Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-1 into 4.7-integration

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-1: (26 commits)
  Compile
  QtScript: Improve performance of type resolution when calling slots
  Improve performance of QScriptValueIterator
  Add default argument values for QScriptValuePrivate property functions
  Move method implementation to private class
  Add benchmarks for QScriptValueIterator
  Fixed the QML browser built into the QML viewer
  Make configure.exe fail for declarative if no script support
  Add QWidget::update() test.
  Add license headers
  Import static contents tests from old manualtests
  Fix Build Failure for Maemo 5 Debug Build
  Add ability to read last mod.time for zip entry.
  Avoid asserting when index passed to QZipReader::entryInfoAt is out of boundaries
  Add isValid() method to QZipReader::FileInfo.
  Add `QIODevice* device() const` public method to QZip classes.
  Rebuild configure.exe (again enable QtDeclarative module by default)
  Update src/3rdparty/javascriptcore and adapt src/script to the changes
  Use index-based approach for iterating over JS array properties
  QFSFileEngine reduce number of system calls
  ...

371 files changed, 22355 insertions, 9631 deletions

diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/APICast.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/APICast.h
index b6d1532..4284c44 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/APICast.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/APICast.h
@@ -27,6 +27,7 @@
 #define APICast_h
 
 #include "JSAPIValueWrapper.h"
+#include "JSGlobalObject.h"
 #include "JSValue.h"
 #include <wtf/Platform.h>
 #include <wtf/UnusedParam.h>
@@ -50,16 +51,20 @@ typedef struct OpaqueJSValue* JSObjectRef;
 
 inline JSC::ExecState* toJS(JSContextRef c)
 {
+    ASSERT(c);
     return reinterpret_cast<JSC::ExecState*>(const_cast<OpaqueJSContext*>(c));
 }
 
 inline JSC::ExecState* toJS(JSGlobalContextRef c)
 {
+    ASSERT(c);
     return reinterpret_cast<JSC::ExecState*>(c);
 }
 
-inline JSC::JSValue toJS(JSC::ExecState*, JSValueRef v)
+inline JSC::JSValue toJS(JSC::ExecState* exec, JSValueRef v)
 {
+    ASSERT_UNUSED(exec, exec);
+    ASSERT(v);
 #if USE(JSVALUE32_64)
     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
     if (!jsCell)
@@ -72,6 +77,20 @@ inline JSC::JSValue toJS(JSC::ExecState*, JSValueRef v)
 #endif
 }
 
+inline JSC::JSValue toJSForGC(JSC::ExecState* exec, JSValueRef v)
+{
+    ASSERT_UNUSED(exec, exec);
+    ASSERT(v);
+#if USE(JSVALUE32_64)
+    JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
+    if (!jsCell)
+        return JSC::JSValue();
+    return jsCell;
+#else
+    return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
+#endif
+}
+
 inline JSC::JSObject* toJS(JSObjectRef o)
 {
     return reinterpret_cast<JSC::JSObject*>(o);
@@ -118,6 +137,7 @@ inline JSContextRef toRef(JSC::ExecState* e)
 
 inline JSGlobalContextRef toGlobalRef(JSC::ExecState* e)
 {
+    ASSERT(e == e->lexicalGlobalObject()->globalExec());
     return reinterpret_cast<JSGlobalContextRef>(e);
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/APIShims.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/APIShims.h
new file mode 100644
index 0000000..f809d5d
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/APIShims.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef APIShims_h
+#define APIShims_h
+
+#include "CallFrame.h"
+#include "JSLock.h"
+
+namespace JSC {
+
+class APIEntryShimWithoutLock {
+protected:
+    APIEntryShimWithoutLock(JSGlobalData* globalData, bool registerThread)
+        : m_globalData(globalData)
+        , m_entryIdentifierTable(setCurrentIdentifierTable(globalData->identifierTable))
+    {
+        if (registerThread)
+            globalData->heap.registerThread();
+        m_globalData->timeoutChecker->start();
+    }
+
+    ~APIEntryShimWithoutLock()
+    {
+        m_globalData->timeoutChecker->stop();
+        setCurrentIdentifierTable(m_entryIdentifierTable);
+    }
+
+private:
+    JSGlobalData* m_globalData;
+    IdentifierTable* m_entryIdentifierTable;
+};
+
+class APIEntryShim : public APIEntryShimWithoutLock {
+public:
+    // Normal API entry
+    APIEntryShim(ExecState* exec, bool registerThread = true)
+        : APIEntryShimWithoutLock(&exec->globalData(), registerThread)
+        , m_lock(exec)
+    {
+    }
+
+    // JSPropertyNameAccumulator only has a globalData.
+    APIEntryShim(JSGlobalData* globalData, bool registerThread = true)
+        : APIEntryShimWithoutLock(globalData, registerThread)
+        , m_lock(globalData->isSharedInstance ? LockForReal : SilenceAssertionsOnly)
+    {
+    }
+
+private:
+    JSLock m_lock;
+};
+
+class APICallbackShim {
+public:
+    APICallbackShim(ExecState* exec)
+        : m_dropAllLocks(exec)
+        , m_globalData(&exec->globalData())
+    {
+        resetCurrentIdentifierTable();
+        m_globalData->timeoutChecker->start();
+    }
+
+    ~APICallbackShim()
+    {
+        m_globalData->timeoutChecker->stop();
+        setCurrentIdentifierTable(m_globalData->identifierTable);
+    }
+
+private:
+    JSLock::DropAllLocks m_dropAllLocks;
+    JSGlobalData* m_globalData;
+};
+
+}
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.cpp
index 4a32d35..ebfeafa 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.cpp
@@ -28,6 +28,7 @@
 #include "JSBasePrivate.h"
 
 #include "APICast.h"
+#include "APIShims.h"
 #include "Completion.h"
 #include "OpaqueJSString.h"
 #include "SourceCode.h"
@@ -43,8 +44,7 @@ using namespace JSC;
 JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsThisObject = toJS(thisObject);
 
@@ -69,8 +69,7 @@ JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef th
 bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber);
     Completion completion = checkSyntax(exec->dynamicGlobalObject()->globalExec(), source);
@@ -94,12 +93,11 @@ void JSGarbageCollect(JSContextRef ctx)
         return;
 
     ExecState* exec = toJS(ctx);
-    JSGlobalData& globalData = exec->globalData();
-
-    JSLock lock(globalData.isSharedInstance ? LockForReal : SilenceAssertionsOnly);
+    APIEntryShim entryShim(exec, false);
 
+    JSGlobalData& globalData = exec->globalData();
     if (!globalData.heap.isBusy())
-        globalData.heap.collect();
+        globalData.heap.collectAllGarbage();
 
     // FIXME: Perhaps we should trigger a second mark and sweep
     // once the garbage collector is done if this is called when
@@ -109,8 +107,6 @@ void JSGarbageCollect(JSContextRef ctx)
 void JSReportExtraMemoryCost(JSContextRef ctx, size_t size)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
-
+    APIEntryShim entryShim(exec);
     exec->globalData().heap.reportExtraMemoryCost(size);
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.h
index 0a0dcda..2e16720 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSBase.h
@@ -64,33 +64,20 @@ typedef struct OpaqueJSValue* JSObjectRef;
 
 /* JavaScript symbol exports */
 
-#if !defined(JS_EXPORT)
-#if defined(BUILDING_WX__)
+#undef JS_EXPORT
+#if defined(JS_NO_EXPORT)
     #define JS_EXPORT
 #elif defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__)
     #define JS_EXPORT __attribute__((visibility("default")))
-#elif defined(_WIN32_WCE)
-    #if defined(JS_BUILDING_JS)
-        #define JS_EXPORT __declspec(dllexport)
-    #elif defined(JS_IMPORT_JS)
-        #define JS_EXPORT __declspec(dllimport)
-    #else
-        #define JS_EXPORT
-    #endif
-#elif defined(WIN32) || defined(_WIN32)
-    /*
-     * TODO: Export symbols with JS_EXPORT when using MSVC.
-     * See http://bugs.webkit.org/show_bug.cgi?id=16227
-     */
+#elif defined(WIN32) || defined(_WIN32) || defined(_WIN32_WCE)
     #if defined(BUILDING_JavaScriptCore) || defined(BUILDING_WTF)
-    #define JS_EXPORT __declspec(dllexport)
+        #define JS_EXPORT __declspec(dllexport)
     #else
-    #define JS_EXPORT __declspec(dllimport)
+        #define JS_EXPORT __declspec(dllimport)
     #endif
 #else
     #define JS_EXPORT
 #endif
-#endif
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.cpp
index 64c83cb..9c5f6d7 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.cpp
@@ -26,6 +26,7 @@
 #include "config.h"
 #include "JSCallbackConstructor.h"
 
+#include "APIShims.h"
 #include "APICast.h"
 #include <runtime/JSGlobalObject.h>
 #include <runtime/JSLock.h>
@@ -36,7 +37,7 @@ namespace JSC {
 
 const ClassInfo JSCallbackConstructor::info = { "CallbackConstructor", 0, 0, 0 };
 
-JSCallbackConstructor::JSCallbackConstructor(PassRefPtr<Structure> structure, JSClassRef jsClass, JSObjectCallAsConstructorCallback callback)
+JSCallbackConstructor::JSCallbackConstructor(NonNullPassRefPtr<Structure> structure, JSClassRef jsClass, JSObjectCallAsConstructorCallback callback)
     : JSObject(structure)
     , m_class(jsClass)
     , m_callback(callback)
@@ -66,7 +67,7 @@ static JSObject* constructJSCallback(ExecState* exec, JSObject* constructor, con
         JSValueRef exception = 0;
         JSObjectRef result;
         {
-            JSLock::DropAllLocks dropAllLocks(exec);
+            APICallbackShim callbackShim(exec);
             result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception);
         }
         if (exception)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.h
index 0497aa2..c4bd7ad 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackConstructor.h
@@ -33,7 +33,7 @@ namespace JSC {
 
 class JSCallbackConstructor : public JSObject {
 public:
-    JSCallbackConstructor(PassRefPtr<Structure>, JSClassRef, JSObjectCallAsConstructorCallback);
+    JSCallbackConstructor(NonNullPassRefPtr<Structure>, JSClassRef, JSObjectCallAsConstructorCallback);
     virtual ~JSCallbackConstructor();
     JSClassRef classRef() const { return m_class; }
     JSObjectCallAsConstructorCallback callback() const { return m_callback; }
@@ -41,9 +41,12 @@ public:
     
     static PassRefPtr<Structure> createStructure(JSValue proto) 
     { 
-        return Structure::create(proto, TypeInfo(ObjectType, ImplementsHasInstance | HasStandardGetOwnPropertySlot | HasDefaultMark | HasDefaultGetPropertyNames)); 
+        return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); 
     }
 
+protected:
+    static const unsigned StructureFlags = ImplementsHasInstance | JSObject::StructureFlags;
+
 private:
     virtual ConstructType getConstructData(ConstructData&);
     virtual const ClassInfo* classInfo() const { return &info; }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.cpp
index b7dd768..0e434d9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.cpp
@@ -27,6 +27,7 @@
 #include <wtf/Platform.h>
 #include "JSCallbackFunction.h"
 
+#include "APIShims.h"
 #include "APICast.h"
 #include "CodeBlock.h"
 #include "JSFunction.h"
@@ -61,7 +62,7 @@ JSValue JSCallbackFunction::call(ExecState* exec, JSObject* functionObject, JSVa
     JSValueRef exception = 0;
     JSValueRef result;
     {
-        JSLock::DropAllLocks dropAllLocks(exec);
+        APICallbackShim callbackShim(exec);
         result = static_cast<JSCallbackFunction*>(functionObject)->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
     }
     if (exception)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.h
index 3a17fa2..0cf25c4 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackFunction.h
@@ -41,7 +41,7 @@ public:
     // refactor the code so this override isn't necessary
     static PassRefPtr<Structure> createStructure(JSValue proto) 
     { 
-        return Structure::create(proto, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultMark)); 
+        return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); 
     }
 
 private:
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObject.h
index e767cb5..2e25991 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObject.h
@@ -36,7 +36,7 @@ namespace JSC {
 template <class Base>
 class JSCallbackObject : public Base {
 public:
-    JSCallbackObject(ExecState*, PassRefPtr<Structure>, JSClassRef, void* data);
+    JSCallbackObject(ExecState*, NonNullPassRefPtr<Structure>, JSClassRef, void* data);
     JSCallbackObject(JSClassRef);
     virtual ~JSCallbackObject();
 
@@ -50,23 +50,27 @@ public:
 
     static PassRefPtr<Structure> createStructure(JSValue proto) 
     { 
-        return Structure::create(proto, TypeInfo(ObjectType, ImplementsHasInstance | OverridesHasInstance)); 
+        return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); 
     }
 
+protected:
+    static const unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | Base::StructureFlags;
+
 private:
     virtual UString className() const;
 
     virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
     virtual bool getOwnPropertySlot(ExecState*, unsigned, PropertySlot&);
+    virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
     
     virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
 
-    virtual bool deleteProperty(ExecState*, const Identifier&, bool checkDontDelete = true);
-    virtual bool deleteProperty(ExecState*, unsigned, bool checkDontDelete = true);
+    virtual bool deleteProperty(ExecState*, const Identifier&);
+    virtual bool deleteProperty(ExecState*, unsigned);
 
     virtual bool hasInstance(ExecState* exec, JSValue value, JSValue proto);
 
-    virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, bool includeNonEnumerable = false);
+    virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
 
     virtual double toNumber(ExecState*) const;
     virtual UString toString(ExecState*) const;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObjectFunctions.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObjectFunctions.h
index c84c191..4b28a99 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObjectFunctions.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSCallbackObjectFunctions.h
@@ -24,6 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
+#include "APIShims.h"
 #include "APICast.h"
 #include "Error.h"
 #include "JSCallbackFunction.h"
@@ -47,7 +48,7 @@ inline JSCallbackObject<Base>* JSCallbackObject<Base>::asCallbackObject(JSValue
 }
 
 template <class Base>
-JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, PassRefPtr<Structure> structure, JSClassRef jsClass, void* data)
+JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, NonNullPassRefPtr<Structure> structure, JSClassRef jsClass, void* data)
     : Base(structure)
     , m_callbackObjectData(new JSCallbackObjectData(data, jsClass))
 {
@@ -79,7 +80,7 @@ void JSCallbackObject<Base>::init(ExecState* exec)
     
     // initialize from base to derived
     for (int i = static_cast<int>(initRoutines.size()) - 1; i >= 0; i--) {
-        JSLock::DropAllLocks dropAllLocks(exec);
+        APICallbackShim callbackShim(exec);
         JSObjectInitializeCallback initialize = initRoutines[i];
         initialize(toRef(exec), toRef(this));
     }
@@ -117,7 +118,7 @@ bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, const Identifie
         if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());
-            JSLock::DropAllLocks dropAllLocks(exec);
+            APICallbackShim callbackShim(exec);
             if (hasProperty(ctx, thisRef, propertyNameRef.get())) {
                 slot.setCustom(this, callbackGetter);
                 return true;
@@ -128,18 +129,18 @@ bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, const Identifie
             JSValueRef exception = 0;
             JSValueRef value;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 value = getProperty(ctx, thisRef, propertyNameRef.get(), &exception);
             }
-            exec->setException(toJS(exec, exception));
-            if (value) {
-                slot.setValue(toJS(exec, value));
-                return true;
-            }
             if (exception) {
+                exec->setException(toJS(exec, exception));
                 slot.setValue(jsUndefined());
                 return true;
             }
+            if (value) {
+                slot.setValue(toJS(exec, value));
+                return true;
+            }
         }
         
         if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
@@ -167,6 +168,25 @@ bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, unsigned proper
 }
 
 template <class Base>
+bool JSCallbackObject<Base>::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
+{
+    PropertySlot slot;
+    if (getOwnPropertySlot(exec, propertyName, slot)) {
+        // Ideally we should return an access descriptor, but returning a value descriptor is better than nothing.
+        JSValue value = slot.getValue(exec, propertyName);
+        if (!exec->hadException())
+            descriptor.setValue(value);
+        // We don't know whether the property is configurable, but assume it is.
+        descriptor.setConfigurable(true);
+        // We don't know whether the property is enumerable (we could call getOwnPropertyNames() to find out), but assume it isn't.
+        descriptor.setEnumerable(false);
+        return true;
+    }
+
+    return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
+}
+
+template <class Base>
 void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
 {
     JSContextRef ctx = toRef(exec);
@@ -181,10 +201,11 @@ void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName
             JSValueRef exception = 0;
             bool result;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
             }
-            exec->setException(toJS(exec, exception));
+            if (exception)
+                exec->setException(toJS(exec, exception));
             if (result || exception)
                 return;
         }
@@ -199,10 +220,11 @@ void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName
                     JSValueRef exception = 0;
                     bool result;
                     {
-                        JSLock::DropAllLocks dropAllLocks(exec);
+                        APICallbackShim callbackShim(exec);
                         result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
                     }
-                    exec->setException(toJS(exec, exception));
+                    if (exception)
+                        exec->setException(toJS(exec, exception));
                     if (result || exception)
                         return;
                 } else
@@ -224,7 +246,7 @@ void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName
 }
 
 template <class Base>
-bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
     JSContextRef ctx = toRef(exec);
     JSObjectRef thisRef = toRef(this);
@@ -237,10 +259,11 @@ bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& p
             JSValueRef exception = 0;
             bool result;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 result = deleteProperty(ctx, thisRef, propertyNameRef.get(), &exception);
             }
-            exec->setException(toJS(exec, exception));
+            if (exception)
+                exec->setException(toJS(exec, exception));
             if (result || exception)
                 return true;
         }
@@ -262,13 +285,13 @@ bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& p
         }
     }
     
-    return Base::deleteProperty(exec, propertyName, checkDontDelete);
+    return Base::deleteProperty(exec, propertyName);
 }
 
 template <class Base>
-bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, unsigned propertyName, bool checkDontDelete)
+bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, unsigned propertyName)
 {
-    return deleteProperty(exec, Identifier::from(exec, propertyName), checkDontDelete);
+    return deleteProperty(exec, Identifier::from(exec, propertyName));
 }
 
 template <class Base>
@@ -298,10 +321,11 @@ JSObject* JSCallbackObject<Base>::construct(ExecState* exec, JSObject* construct
             JSValueRef exception = 0;
             JSObject* result;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 result = toJS(callAsConstructor(execRef, constructorRef, argumentCount, arguments.data(), &exception));
             }
-            exec->setException(toJS(exec, exception));
+            if (exception)
+                exec->setException(toJS(exec, exception));
             return result;
         }
     }
@@ -322,10 +346,11 @@ bool JSCallbackObject<Base>::hasInstance(ExecState* exec, JSValue value, JSValue
             JSValueRef exception = 0;
             bool result;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 result = hasInstance(execRef, thisRef, valueRef, &exception);
             }
-            exec->setException(toJS(exec, exception));
+            if (exception)
+                exec->setException(toJS(exec, exception));
             return result;
         }
     }
@@ -360,10 +385,11 @@ JSValue JSCallbackObject<Base>::call(ExecState* exec, JSObject* functionObject,
             JSValueRef exception = 0;
             JSValue result;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 result = toJS(exec, callAsFunction(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception));
             }
-            exec->setException(toJS(exec, exception));
+            if (exception)
+                exec->setException(toJS(exec, exception));
             return result;
         }
     }
@@ -373,14 +399,14 @@ JSValue JSCallbackObject<Base>::call(ExecState* exec, JSObject* functionObject,
 }
 
 template <class Base>
-void JSCallbackObject<Base>::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void JSCallbackObject<Base>::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
     JSContextRef execRef = toRef(exec);
     JSObjectRef thisRef = toRef(this);
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames) {
-            JSLock::DropAllLocks dropAllLocks(exec);
+            APICallbackShim callbackShim(exec);
             getPropertyNames(execRef, thisRef, toRef(&propertyNames));
         }
         
@@ -390,7 +416,7 @@ void JSCallbackObject<Base>::getOwnPropertyNames(ExecState* exec, PropertyNameAr
             for (iterator it = staticValues->begin(); it != end; ++it) {
                 UString::Rep* name = it->first.get();
                 StaticValueEntry* entry = it->second;
-                if (entry->getProperty && !(entry->attributes & kJSPropertyAttributeDontEnum))
+                if (entry->getProperty && (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties)))
                     propertyNames.add(Identifier(exec, name));
             }
         }
@@ -401,13 +427,13 @@ void JSCallbackObject<Base>::getOwnPropertyNames(ExecState* exec, PropertyNameAr
             for (iterator it = staticFunctions->begin(); it != end; ++it) {
                 UString::Rep* name = it->first.get();
                 StaticFunctionEntry* entry = it->second;
-                if (!(entry->attributes & kJSPropertyAttributeDontEnum))
+                if (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties))
                     propertyNames.add(Identifier(exec, name));
             }
         }
     }
     
-    Base::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+    Base::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 template <class Base>
@@ -426,7 +452,7 @@ double JSCallbackObject<Base>::toNumber(ExecState* exec) const
             JSValueRef exception = 0;
             JSValueRef value;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 value = convertToType(ctx, thisRef, kJSTypeNumber, &exception);
             }
             if (exception) {
@@ -435,7 +461,8 @@ double JSCallbackObject<Base>::toNumber(ExecState* exec) const
             }
 
             double dValue;
-            return toJS(exec, value).getNumber(dValue) ? dValue : NaN;
+            if (value)
+                return toJS(exec, value).getNumber(dValue) ? dValue : NaN;
         }
             
     return Base::toNumber(exec);
@@ -452,14 +479,15 @@ UString JSCallbackObject<Base>::toString(ExecState* exec) const
             JSValueRef exception = 0;
             JSValueRef value;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 value = convertToType(ctx, thisRef, kJSTypeString, &exception);
             }
             if (exception) {
                 exec->setException(toJS(exec, exception));
                 return "";
             }
-            return toJS(exec, value).getString();
+            if (value)
+                return toJS(exec, value).getString(exec);
         }
             
     return Base::toString(exec);
@@ -504,16 +532,17 @@ JSValue JSCallbackObject<Base>::staticValueGetter(ExecState* exec, const Identif
                     JSValueRef exception = 0;
                     JSValueRef value;
                     {
-                        JSLock::DropAllLocks dropAllLocks(exec);
+                        APICallbackShim callbackShim(exec);
                         value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
                     }
-                    exec->setException(toJS(exec, exception));
+                    if (exception) {
+                        exec->setException(toJS(exec, exception));
+                        return jsUndefined();
+                    }
                     if (value)
                         return toJS(exec, value);
-                    if (exception)
-                        return jsUndefined();
                 }
-                    
+
     return throwError(exec, ReferenceError, "Static value property defined with NULL getProperty callback.");
 }
 
@@ -557,14 +586,15 @@ JSValue JSCallbackObject<Base>::callbackGetter(ExecState* exec, const Identifier
             JSValueRef exception = 0;
             JSValueRef value;
             {
-                JSLock::DropAllLocks dropAllLocks(exec);
+                APICallbackShim callbackShim(exec);
                 value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
             }
-            exec->setException(toJS(exec, exception));
+            if (exception) {
+                exec->setException(toJS(exec, exception));
+                return jsUndefined();
+            }
             if (value)
                 return toJS(exec, value);
-            if (exception)
-                return jsUndefined();
         }
             
     return throwError(exec, ReferenceError, "hasProperty callback returned true for a property that doesn't exist.");
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.cpp
index afde7ce..c6685bf 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.cpp
@@ -34,6 +34,7 @@
 #include <runtime/ObjectPrototype.h>
 #include <runtime/Identifier.h>
 
+using namespace std;
 using namespace JSC;
 
 const JSClassDefinition kJSClassDefinitionEmpty = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
@@ -52,7 +53,7 @@ OpaqueJSClass::OpaqueJSClass(const JSClassDefinition* definition, OpaqueJSClass*
     , callAsConstructor(definition->callAsConstructor)
     , hasInstance(definition->hasInstance)
     , convertToType(definition->convertToType)
-    , m_className(UString::Rep::createFromUTF8(definition->className))
+    , m_className(UString::createFromUTF8(definition->className).rep()->ref())
     , m_staticValues(0)
     , m_staticFunctions(0)
 {
@@ -61,8 +62,9 @@ OpaqueJSClass::OpaqueJSClass(const JSClassDefinition* definition, OpaqueJSClass*
     if (const JSStaticValue* staticValue = definition->staticValues) {
         m_staticValues = new OpaqueJSClassStaticValuesTable();
         while (staticValue->name) {
-            m_staticValues->add(UString::Rep::createFromUTF8(staticValue->name),
-                              new StaticValueEntry(staticValue->getProperty, staticValue->setProperty, staticValue->attributes));
+            // Use a local variable here to sidestep an RVCT compiler bug.
+            StaticValueEntry* entry = new StaticValueEntry(staticValue->getProperty, staticValue->setProperty, staticValue->attributes);
+            m_staticValues->add(UString::createFromUTF8(staticValue->name).rep()->ref(), entry);
             ++staticValue;
         }
     }
@@ -70,8 +72,9 @@ OpaqueJSClass::OpaqueJSClass(const JSClassDefinition* definition, OpaqueJSClass*
     if (const JSStaticFunction* staticFunction = definition->staticFunctions) {
         m_staticFunctions = new OpaqueJSClassStaticFunctionsTable();
         while (staticFunction->name) {
-            m_staticFunctions->add(UString::Rep::createFromUTF8(staticFunction->name),
-                                 new StaticFunctionEntry(staticFunction->callAsFunction, staticFunction->attributes));
+            // Use a local variable here to sidestep an RVCT compiler bug.
+            StaticFunctionEntry* entry = new StaticFunctionEntry(staticFunction->callAsFunction, staticFunction->attributes);
+            m_staticFunctions->add(UString::createFromUTF8(staticFunction->name).rep()->ref(), entry);
             ++staticFunction;
         }
     }
@@ -82,12 +85,12 @@ OpaqueJSClass::OpaqueJSClass(const JSClassDefinition* definition, OpaqueJSClass*
 
 OpaqueJSClass::~OpaqueJSClass()
 {
-    ASSERT(!m_className.rep()->identifierTable());
+    ASSERT(!m_className.rep()->isIdentifier());
 
     if (m_staticValues) {
         OpaqueJSClassStaticValuesTable::const_iterator end = m_staticValues->end();
         for (OpaqueJSClassStaticValuesTable::const_iterator it = m_staticValues->begin(); it != end; ++it) {
-            ASSERT(!it->first->identifierTable());
+            ASSERT(!it->first->isIdentifier());
             delete it->second;
         }
         delete m_staticValues;
@@ -96,7 +99,7 @@ OpaqueJSClass::~OpaqueJSClass()
     if (m_staticFunctions) {
         OpaqueJSClassStaticFunctionsTable::const_iterator end = m_staticFunctions->end();
         for (OpaqueJSClassStaticFunctionsTable::const_iterator it = m_staticFunctions->begin(); it != end; ++it) {
-            ASSERT(!it->first->identifierTable());
+            ASSERT(!it->first->isIdentifier());
             delete it->second;
         }
         delete m_staticFunctions;
@@ -118,39 +121,32 @@ static void clearReferenceToPrototype(JSObjectRef prototype)
     jsClassData->cachedPrototype = 0;
 }
 
-PassRefPtr<OpaqueJSClass> OpaqueJSClass::create(const JSClassDefinition* definition)
+PassRefPtr<OpaqueJSClass> OpaqueJSClass::create(const JSClassDefinition* clientDefinition)
 {
-    if (const JSStaticFunction* staticFunctions = definition->staticFunctions) {
-        // copy functions into a prototype class
-        JSClassDefinition protoDefinition = kJSClassDefinitionEmpty;
-        protoDefinition.staticFunctions = staticFunctions;
-        protoDefinition.finalize = clearReferenceToPrototype;
-        
-        // We are supposed to use JSClassRetain/Release but since we know that we currently have
-        // the only reference to this class object we cheat and use a RefPtr instead.
-        RefPtr<OpaqueJSClass> protoClass = adoptRef(new OpaqueJSClass(&protoDefinition, 0));
-
-        // remove functions from the original class
-        JSClassDefinition objectDefinition = *definition;
-        objectDefinition.staticFunctions = 0;
-
-        return adoptRef(new OpaqueJSClass(&objectDefinition, protoClass.get()));
-    }
+    JSClassDefinition definition = *clientDefinition; // Avoid modifying client copy.
 
-    return adoptRef(new OpaqueJSClass(definition, 0));
+    JSClassDefinition protoDefinition = kJSClassDefinitionEmpty;
+    protoDefinition.finalize = clearReferenceToPrototype;
+    swap(definition.staticFunctions, protoDefinition.staticFunctions); // Move static functions to the prototype.
+    
+    // We are supposed to use JSClassRetain/Release but since we know that we currently have
+    // the only reference to this class object we cheat and use a RefPtr instead.
+    RefPtr<OpaqueJSClass> protoClass = adoptRef(new OpaqueJSClass(&protoDefinition, 0));
+    return adoptRef(new OpaqueJSClass(&definition, protoClass.get()));
 }
 
 OpaqueJSClassContextData::OpaqueJSClassContextData(OpaqueJSClass* jsClass)
     : m_class(jsClass)
-    , cachedPrototype(0)
 {
     if (jsClass->m_staticValues) {
         staticValues = new OpaqueJSClassStaticValuesTable;
         OpaqueJSClassStaticValuesTable::const_iterator end = jsClass->m_staticValues->end();
         for (OpaqueJSClassStaticValuesTable::const_iterator it = jsClass->m_staticValues->begin(); it != end; ++it) {
-            ASSERT(!it->first->identifierTable());
-            staticValues->add(UString::Rep::createCopying(it->first->data(), it->first->size()),
-                              new StaticValueEntry(it->second->getProperty, it->second->setProperty, it->second->attributes));
+            ASSERT(!it->first->isIdentifier());
+            // Use a local variable here to sidestep an RVCT compiler bug.
+            StaticValueEntry* entry = new StaticValueEntry(it->second->getProperty, it->second->setProperty, it->second->attributes);
+            staticValues->add(UString::Rep::create(it->first->data(), it->first->size()), entry);
+
         }
             
     } else
@@ -161,9 +157,10 @@ OpaqueJSClassContextData::OpaqueJSClassContextData(OpaqueJSClass* jsClass)
         staticFunctions = new OpaqueJSClassStaticFunctionsTable;
         OpaqueJSClassStaticFunctionsTable::const_iterator end = jsClass->m_staticFunctions->end();
         for (OpaqueJSClassStaticFunctionsTable::const_iterator it = jsClass->m_staticFunctions->begin(); it != end; ++it) {
-            ASSERT(!it->first->identifierTable());
-            staticFunctions->add(UString::Rep::createCopying(it->first->data(), it->first->size()),
-                              new StaticFunctionEntry(it->second->callAsFunction, it->second->attributes));
+            ASSERT(!it->first->isIdentifier());
+            // Use a local variable here to sidestep an RVCT compiler bug.
+            StaticFunctionEntry* entry = new StaticFunctionEntry(it->second->callAsFunction, it->second->attributes);
+            staticFunctions->add(UString::Rep::create(it->first->data(), it->first->size()), entry);
         }
             
     } else
@@ -240,5 +237,5 @@ JSObject* OpaqueJSClass::prototype(ExecState* exec)
                 jsClassData.cachedPrototype->setPrototype(prototype);
         }
     }
-    return jsClassData.cachedPrototype;
+    return jsClassData.cachedPrototype.get();
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.h
index c4777dd..ae60aad 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.h
@@ -31,6 +31,7 @@
 #include <runtime/JSObject.h>
 #include <runtime/Protect.h>
 #include <runtime/UString.h>
+#include <runtime/WeakGCPtr.h>
 #include <wtf/HashMap.h>
 #include <wtf/RefCounted.h>
 
@@ -76,7 +77,7 @@ struct OpaqueJSClassContextData : Noncopyable {
 
     OpaqueJSClassStaticValuesTable* staticValues;
     OpaqueJSClassStaticFunctionsTable* staticFunctions;
-    JSC::JSObject* cachedPrototype;
+    JSC::WeakGCPtr<JSC::JSObject> cachedPrototype;
 };
 
 struct OpaqueJSClass : public ThreadSafeShared<OpaqueJSClass> {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSContextRef.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSContextRef.cpp
index c358a84..6bdc3c8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSContextRef.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSContextRef.cpp
@@ -25,6 +25,7 @@
 
 #include "config.h"
 #include "JSContextRef.h"
+#include "JSContextRefPrivate.h"
 
 #include "APICast.h"
 #include "InitializeThreading.h"
@@ -34,7 +35,7 @@
 #include "JSObject.h"
 #include <wtf/Platform.h>
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 #include <mach-o/dyld.h>
 
 static const int32_t webkitFirstVersionWithConcurrentGlobalContexts = 0x2100500; // 528.5.0
@@ -45,7 +46,7 @@ using namespace JSC;
 JSContextGroupRef JSContextGroupCreate()
 {
     initializeThreading();
-    return toRef(JSGlobalData::create().releaseRef());
+    return toRef(JSGlobalData::createNonDefault().releaseRef());
 }
 
 JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)
@@ -62,7 +63,7 @@ void JSContextGroupRelease(JSContextGroupRef group)
 JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass)
 {
     initializeThreading();
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
     // When running on Tiger or Leopard, or if the application was linked before JSGlobalContextCreate was changed
     // to use a unique JSGlobalData, we use a shared one for compatibility.
 #if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
@@ -73,7 +74,7 @@ JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass)
         JSLock lock(LockForReal);
         return JSGlobalContextCreateInGroup(toRef(&JSGlobalData::sharedInstance()), globalObjectClass);
     }
-#endif // PLATFORM(DARWIN)
+#endif // OS(DARWIN)
 
     return JSGlobalContextCreateInGroup(0, globalObjectClass);
 }
@@ -83,8 +84,9 @@ JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClass
     initializeThreading();
 
     JSLock lock(LockForReal);
+    RefPtr<JSGlobalData> globalData = group ? PassRefPtr<JSGlobalData>(toJS(group)) : JSGlobalData::createNonDefault();
 
-    RefPtr<JSGlobalData> globalData = group ? PassRefPtr<JSGlobalData>(toJS(group)) : JSGlobalData::create();
+    APIEntryShim entryShim(globalData.get(), false);
 
 #if ENABLE(JSC_MULTIPLE_THREADS)
     globalData->makeUsableFromMultipleThreads();
@@ -107,12 +109,9 @@ JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClass
 JSGlobalContextRef JSGlobalContextRetain(JSGlobalContextRef ctx)
 {
     ExecState* exec = toJS(ctx);
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSGlobalData& globalData = exec->globalData();
-
-    globalData.heap.registerThread();
-
     gcProtect(exec->dynamicGlobalObject());
     globalData.ref();
     return ctx;
@@ -121,18 +120,16 @@ JSGlobalContextRef JSGlobalContextRetain(JSGlobalContextRef ctx)
 void JSGlobalContextRelease(JSGlobalContextRef ctx)
 {
     ExecState* exec = toJS(ctx);
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec, false);
 
     gcUnprotect(exec->dynamicGlobalObject());
 
     JSGlobalData& globalData = exec->globalData();
     if (globalData.refCount() == 2) { // One reference is held by JSGlobalObject, another added by JSGlobalContextRetain().
         // The last reference was released, this is our last chance to collect.
-        ASSERT(!globalData.heap.protectedObjectCount());
-        ASSERT(!globalData.heap.isBusy());
         globalData.heap.destroy();
     } else
-        globalData.heap.collect();
+        globalData.heap.collectAllGarbage();
 
     globalData.deref();
 }
@@ -140,8 +137,7 @@ void JSGlobalContextRelease(JSGlobalContextRef ctx)
 JSObjectRef JSContextGetGlobalObject(JSContextRef ctx)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     // It is necessary to call toThisObject to get the wrapper object when used with WebCore.
     return toRef(exec->lexicalGlobalObject()->toThisObject(exec));
@@ -152,3 +148,11 @@ JSContextGroupRef JSContextGetGroup(JSContextRef ctx)
     ExecState* exec = toJS(ctx);
     return toRef(&exec->globalData());
 }
+
+JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx)
+{
+    ExecState* exec = toJS(ctx);
+    APIEntryShim entryShim(exec);
+
+    return toGlobalRef(exec->lexicalGlobalObject()->globalExec());
+}
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSContextRefPrivate.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSContextRefPrivate.h
new file mode 100644
index 0000000..ff014ec
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSContextRefPrivate.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2009 Apple Computer, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef JSContextRefPrivate_h
+#define JSContextRefPrivate_h
+
+#include <JavaScriptCore/JSObjectRef.h>
+#include <JavaScriptCore/JSValueRef.h>
+#include <JavaScriptCore/WebKitAvailability.h>
+
+#ifndef __cplusplus
+#include <stdbool.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*!
+@function
+@abstract Gets the global context of a JavaScript execution context.
+@param ctx The JSContext whose global context you want to get.
+@result ctx's global context.
+*/
+JS_EXPORT JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* JSContextRefPrivate_h */
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSObjectRef.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSObjectRef.cpp
index 06ef578..faaa4eb 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSObjectRef.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSObjectRef.cpp
@@ -76,8 +76,7 @@ void JSClassRelease(JSClassRef jsClass)
 JSObjectRef JSObjectMake(JSContextRef ctx, JSClassRef jsClass, void* data)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     if (!jsClass)
         return toRef(new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure())); // slightly more efficient
@@ -92,8 +91,7 @@ JSObjectRef JSObjectMake(JSContextRef ctx, JSClassRef jsClass, void* data)
 JSObjectRef JSObjectMakeFunctionWithCallback(JSContextRef ctx, JSStringRef name, JSObjectCallAsFunctionCallback callAsFunction)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     Identifier nameID = name ? name->identifier(&exec->globalData()) : Identifier(exec, "anonymous");
     
@@ -103,8 +101,7 @@ JSObjectRef JSObjectMakeFunctionWithCallback(JSContextRef ctx, JSStringRef name,
 JSObjectRef JSObjectMakeConstructor(JSContextRef ctx, JSClassRef jsClass, JSObjectCallAsConstructorCallback callAsConstructor)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsPrototype = jsClass ? jsClass->prototype(exec) : 0;
     if (!jsPrototype)
@@ -118,8 +115,7 @@ JSObjectRef JSObjectMakeConstructor(JSContextRef ctx, JSClassRef jsClass, JSObje
 JSObjectRef JSObjectMakeFunction(JSContextRef ctx, JSStringRef name, unsigned parameterCount, const JSStringRef parameterNames[], JSStringRef body, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     Identifier nameID = name ? name->identifier(&exec->globalData()) : Identifier(exec, "anonymous");
     
@@ -141,8 +137,7 @@ JSObjectRef JSObjectMakeFunction(JSContextRef ctx, JSStringRef name, unsigned pa
 JSObjectRef JSObjectMakeArray(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* result;
     if (argumentCount) {
@@ -167,8 +162,7 @@ JSObjectRef JSObjectMakeArray(JSContextRef ctx, size_t argumentCount, const JSVa
 JSObjectRef JSObjectMakeDate(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     MarkedArgumentBuffer argList;
     for (size_t i = 0; i < argumentCount; ++i)
@@ -188,8 +182,7 @@ JSObjectRef JSObjectMakeDate(JSContextRef ctx, size_t argumentCount, const JSVal
 JSObjectRef JSObjectMakeError(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     MarkedArgumentBuffer argList;
     for (size_t i = 0; i < argumentCount; ++i)
@@ -209,8 +202,7 @@ JSObjectRef JSObjectMakeError(JSContextRef ctx, size_t argumentCount, const JSVa
 JSObjectRef JSObjectMakeRegExp(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     MarkedArgumentBuffer argList;
     for (size_t i = 0; i < argumentCount; ++i)
@@ -230,8 +222,7 @@ JSObjectRef JSObjectMakeRegExp(JSContextRef ctx, size_t argumentCount, const JSV
 JSValueRef JSObjectGetPrototype(JSContextRef ctx, JSObjectRef object)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
     return toRef(exec, jsObject->prototype());
@@ -240,8 +231,7 @@ JSValueRef JSObjectGetPrototype(JSContextRef ctx, JSObjectRef object)
 void JSObjectSetPrototype(JSContextRef ctx, JSObjectRef object, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
     JSValue jsValue = toJS(exec, value);
@@ -252,8 +242,7 @@ void JSObjectSetPrototype(JSContextRef ctx, JSObjectRef object, JSValueRef value
 bool JSObjectHasProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
     
@@ -263,8 +252,7 @@ bool JSObjectHasProperty(JSContextRef ctx, JSObjectRef object, JSStringRef prope
 JSValueRef JSObjectGetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
 
@@ -280,8 +268,7 @@ JSValueRef JSObjectGetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef
 void JSObjectSetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef value, JSPropertyAttributes attributes, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
     Identifier name(propertyName->identifier(&exec->globalData()));
@@ -304,8 +291,7 @@ void JSObjectSetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef prope
 JSValueRef JSObjectGetPropertyAtIndex(JSContextRef ctx, JSObjectRef object, unsigned propertyIndex, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
 
@@ -322,8 +308,7 @@ JSValueRef JSObjectGetPropertyAtIndex(JSContextRef ctx, JSObjectRef object, unsi
 void JSObjectSetPropertyAtIndex(JSContextRef ctx, JSObjectRef object, unsigned propertyIndex, JSValueRef value, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
     JSValue jsValue = toJS(exec, value);
@@ -339,8 +324,7 @@ void JSObjectSetPropertyAtIndex(JSContextRef ctx, JSObjectRef object, unsigned p
 bool JSObjectDeleteProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
 
@@ -389,8 +373,7 @@ bool JSObjectIsFunction(JSContextRef, JSObjectRef object)
 JSValueRef JSObjectCallAsFunction(JSContextRef ctx, JSObjectRef object, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
     JSObject* jsThisObject = toJS(thisObject);
@@ -427,8 +410,7 @@ bool JSObjectIsConstructor(JSContextRef, JSObjectRef object)
 JSObjectRef JSObjectCallAsConstructor(JSContextRef ctx, JSObjectRef object, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSObject* jsObject = toJS(object);
 
@@ -466,8 +448,7 @@ JSPropertyNameArrayRef JSObjectCopyPropertyNames(JSContextRef ctx, JSObjectRef o
 {
     JSObject* jsObject = toJS(object);
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSGlobalData* globalData = &exec->globalData();
 
@@ -492,7 +473,7 @@ JSPropertyNameArrayRef JSPropertyNameArrayRetain(JSPropertyNameArrayRef array)
 void JSPropertyNameArrayRelease(JSPropertyNameArrayRef array)
 {
     if (--array->refCount == 0) {
-        JSLock lock(array->globalData->isSharedInstance ? LockForReal : SilenceAssertionsOnly);
+        APIEntryShim entryShim(array->globalData, false);
         delete array;
     }
 }
@@ -510,9 +491,6 @@ JSStringRef JSPropertyNameArrayGetNameAtIndex(JSPropertyNameArrayRef array, size
 void JSPropertyNameAccumulatorAddName(JSPropertyNameAccumulatorRef array, JSStringRef propertyName)
 {
     PropertyNameArray* propertyNames = toJS(array);
-
-    propertyNames->globalData()->heap.registerThread();
-    JSLock lock(propertyNames->globalData()->isSharedInstance ? LockForReal : SilenceAssertionsOnly);
-
+    APIEntryShim entryShim(propertyNames->globalData());
     propertyNames->add(propertyName->identifier(propertyNames->globalData()));
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSStringRef.h b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSStringRef.h
index 41d8978..c58b958 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSStringRef.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSStringRef.h
@@ -37,7 +37,7 @@
 extern "C" {
 #endif
 
-#if (!defined(WIN32) && !defined(_WIN32) && !defined(__WINSCW__))
+#if !defined(WIN32) && !defined(_WIN32) && !defined(__WINSCW__)
 /*!
 @typedef JSChar
 @abstract A Unicode character.
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSValueRef.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSValueRef.cpp
index 2207181..a12cc34 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/JSValueRef.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/JSValueRef.cpp
@@ -28,6 +28,7 @@
 
 #include <wtf/Platform.h>
 #include "APICast.h"
+#include "APIShims.h"
 #include "JSCallbackObject.h"
 
 #include <runtime/JSGlobalObject.h>
@@ -41,13 +42,14 @@
 
 #include <algorithm> // for std::min
 
-JSType JSValueGetType(JSContextRef ctx, JSValueRef value)
+using namespace JSC;
+
+::JSType JSValueGetType(JSContextRef ctx, JSValueRef value)
 {
-    JSC::ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSC::JSLock lock(exec);
+    ExecState* exec = toJS(ctx);
+    APIEntryShim entryShim(exec);
 
-    JSC::JSValue jsValue = toJS(exec, value);
+    JSValue jsValue = toJS(exec, value);
 
     if (jsValue.isUndefined())
         return kJSTypeUndefined;
@@ -63,13 +65,10 @@ JSType JSValueGetType(JSContextRef ctx, JSValueRef value)
     return kJSTypeObject;
 }
 
-using namespace JSC; // placed here to avoid conflict between JSC::JSType and JSType, above.
-
 bool JSValueIsUndefined(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     return jsValue.isUndefined();
@@ -78,8 +77,7 @@ bool JSValueIsUndefined(JSContextRef ctx, JSValueRef value)
 bool JSValueIsNull(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     return jsValue.isNull();
@@ -88,8 +86,7 @@ bool JSValueIsNull(JSContextRef ctx, JSValueRef value)
 bool JSValueIsBoolean(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     return jsValue.isBoolean();
@@ -98,8 +95,7 @@ bool JSValueIsBoolean(JSContextRef ctx, JSValueRef value)
 bool JSValueIsNumber(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     return jsValue.isNumber();
@@ -108,8 +104,7 @@ bool JSValueIsNumber(JSContextRef ctx, JSValueRef value)
 bool JSValueIsString(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     return jsValue.isString();
@@ -118,8 +113,7 @@ bool JSValueIsString(JSContextRef ctx, JSValueRef value)
 bool JSValueIsObject(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     return jsValue.isObject();
@@ -128,8 +122,7 @@ bool JSValueIsObject(JSContextRef ctx, JSValueRef value)
 bool JSValueIsObjectOfClass(JSContextRef ctx, JSValueRef value, JSClassRef jsClass)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     
@@ -145,8 +138,7 @@ bool JSValueIsObjectOfClass(JSContextRef ctx, JSValueRef value, JSClassRef jsCla
 bool JSValueIsEqual(JSContextRef ctx, JSValueRef a, JSValueRef b, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsA = toJS(exec, a);
     JSValue jsB = toJS(exec, b);
@@ -163,20 +155,18 @@ bool JSValueIsEqual(JSContextRef ctx, JSValueRef a, JSValueRef b, JSValueRef* ex
 bool JSValueIsStrictEqual(JSContextRef ctx, JSValueRef a, JSValueRef b)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsA = toJS(exec, a);
     JSValue jsB = toJS(exec, b);
 
-    return JSValue::strictEqual(jsA, jsB);
+    return JSValue::strictEqual(exec, jsA, jsB);
 }
 
 bool JSValueIsInstanceOfConstructor(JSContextRef ctx, JSValueRef value, JSObjectRef constructor, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
 
@@ -195,8 +185,7 @@ bool JSValueIsInstanceOfConstructor(JSContextRef ctx, JSValueRef value, JSObject
 JSValueRef JSValueMakeUndefined(JSContextRef ctx)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     return toRef(exec, jsUndefined());
 }
@@ -204,8 +193,7 @@ JSValueRef JSValueMakeUndefined(JSContextRef ctx)
 JSValueRef JSValueMakeNull(JSContextRef ctx)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     return toRef(exec, jsNull());
 }
@@ -213,8 +201,7 @@ JSValueRef JSValueMakeNull(JSContextRef ctx)
 JSValueRef JSValueMakeBoolean(JSContextRef ctx, bool value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     return toRef(exec, jsBoolean(value));
 }
@@ -222,8 +209,7 @@ JSValueRef JSValueMakeBoolean(JSContextRef ctx, bool value)
 JSValueRef JSValueMakeNumber(JSContextRef ctx, double value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     return toRef(exec, jsNumber(exec, value));
 }
@@ -231,8 +217,7 @@ JSValueRef JSValueMakeNumber(JSContextRef ctx, double value)
 JSValueRef JSValueMakeString(JSContextRef ctx, JSStringRef string)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     return toRef(exec, jsString(exec, string->ustring()));
 }
@@ -240,8 +225,7 @@ JSValueRef JSValueMakeString(JSContextRef ctx, JSStringRef string)
 bool JSValueToBoolean(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     return jsValue.toBoolean(exec);
@@ -250,8 +234,7 @@ bool JSValueToBoolean(JSContextRef ctx, JSValueRef value)
 double JSValueToNumber(JSContextRef ctx, JSValueRef value, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
 
@@ -268,8 +251,7 @@ double JSValueToNumber(JSContextRef ctx, JSValueRef value, JSValueRef* exception
 JSStringRef JSValueToStringCopy(JSContextRef ctx, JSValueRef value, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     
@@ -286,8 +268,7 @@ JSStringRef JSValueToStringCopy(JSContextRef ctx, JSValueRef value, JSValueRef*
 JSObjectRef JSValueToObject(JSContextRef ctx, JSValueRef value, JSValueRef* exception)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
     JSValue jsValue = toJS(exec, value);
     
@@ -304,19 +285,17 @@ JSObjectRef JSValueToObject(JSContextRef ctx, JSValueRef value, JSValueRef* exce
 void JSValueProtect(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
-    JSValue jsValue = toJS(exec, value);
+    JSValue jsValue = toJSForGC(exec, value);
     gcProtect(jsValue);
 }
 
 void JSValueUnprotect(JSContextRef ctx, JSValueRef value)
 {
     ExecState* exec = toJS(ctx);
-    exec->globalData().heap.registerThread();
-    JSLock lock(exec);
+    APIEntryShim entryShim(exec);
 
-    JSValue jsValue = toJS(exec, value);
+    JSValue jsValue = toJSForGC(exec, value);
     gcUnprotect(jsValue);
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/API/OpaqueJSString.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/API/OpaqueJSString.cpp
index 7c7b1af..f740abe 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/API/OpaqueJSString.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/API/OpaqueJSString.cpp
@@ -42,7 +42,7 @@ PassRefPtr<OpaqueJSString> OpaqueJSString::create(const UString& ustring)
 UString OpaqueJSString::ustring() const
 {
     if (this && m_characters)
-        return UString(m_characters, m_length, true);
+        return UString(m_characters, m_length);
     return UString::null();
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog b/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog
index 5fa56a7..35aabc9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog
@@ -1,3 +1,7410 @@
+2010-01-27  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Oliver Hunt.
+
+        [BREWMP] Add MarkStack fastMalloc implementation for platforms without VirtualAlloc or mmap.
+        https://bugs.webkit.org/show_bug.cgi?id=33582
+
+        Use fastMalloc and fastFree to implement MarkStack::allocateStack and
+        MarkStack::releaseStack for platforms without page level allocation.
+
+        * runtime/MarkStack.h:
+        (JSC::MarkStack::MarkStackArray::shrinkAllocation):
+        * runtime/MarkStackNone.cpp: Added.
+        (JSC::MarkStack::initializePagesize):
+        (JSC::MarkStack::allocateStack):
+        (JSC::MarkStack::releaseStack):
+
+2010-01-27  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Eric Seidel.
+
+        [BREWMP] Don't use time function
+        https://bugs.webkit.org/show_bug.cgi?id=33577
+
+        Calling time(0) in BREW devices causes a crash because time
+        is not properly ported in most devices. Cast currentTime() to
+        time_t to get the same result as time(0).
+
+        * wtf/DateMath.cpp:
+        (WTF::calculateUTCOffset):
+
+2010-01-27  Alexey Proskuryakov  <ap@apple.com>
+
+        Revert r53899 (HashMap<AtomicStringImpl*, Value> key checks) and subsequent build fixes,
+        because they make SVG tests crash in release builds.
+
+        * wtf/HashMap.h:
+        (WTF::::remove):
+        * wtf/HashSet.h:
+        (WTF::::remove):
+        * wtf/HashTable.h:
+        (WTF::::add):
+        (WTF::::addPassingHashCode):
+        (WTF::::removeAndInvalidate):
+        (WTF::::remove):
+        (WTF::::rehash):
+        (WTF::::checkTableConsistency):
+        (WTF::::checkTableConsistencyExceptSize):
+        * wtf/HashTraits.h:
+        (WTF::GenericHashTraits::emptyValue):
+        (WTF::):
+        * wtf/RefPtrHashMap.h:
+        (WTF::::remove):
+
+2010-01-26  Alexey Proskuryakov  <ap@apple.com>
+
+        More Windows build fixing.
+
+        * wtf/HashTraits.h: _msize takes void*, remove const qualifier from type.
+
+2010-01-26  Alexey Proskuryakov  <ap@apple.com>
+
+        Windows build fix.
+
+        * wtf/HashTraits.h: Include malloc.h for _msize().
+
+2010-01-26  Alexey Proskuryakov  <ap@apple.com>
+
+        Build fix.
+
+        * wtf/HashTable.h: (WTF::HashTable::checkTableConsistencyExceptSize): Remove const from a
+        static (empty) version of this function.
+
+2010-01-26  Alexey Proskuryakov  <ap@apple.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=34150
+        WebKit needs a mechanism to catch stale HashMap entries
+
+        It is very difficult to catch stale pointers that are HashMap keys - since a pointer's hash
+        is just its value, it is very unlikely that any observable problem is reproducible.
+
+        This extends hash table consistency checks to check that pointers are referencing allocated
+        memory blocks, and makes it possible to invoke the checks explicitly (it is not feasible
+        to enable CHECK_HASHTABLE_CONSISTENCY by default, because that affects performance too much).
+
+        * wtf/HashMap.h: (WTF::::checkConsistency): Call through to HashTable implementation. We can
+        add similar calls to HashSet and HashCountedSet, but I haven't seen hard to debug problems
+        with those yet.
+
+        * wtf/HashSet.h: (WTF::::remove): The version of checkTableConsistency that's guarded by
+        CHECK_HASHTABLE_CONSISTENCY is now called internalCheckTableConsistency().
+
+        * wtf/HashTable.h:
+        (WTF::HashTable::internalCheckTableConsistency):
+        (WTF::HashTable::internalCheckTableConsistencyExceptSize):
+        (WTF::HashTable::checkTableConsistencyExceptSize):
+        Expose checkTableConsistency() even if CHECK_HASHTABLE_CONSISTENCY is off.
+        (WTF::::add): Updated for checkTableConsistency renaming.
+        (WTF::::addPassingHashCode): Ditto.
+        (WTF::::removeAndInvalidate): Ditto.
+        (WTF::::remove): Ditto.
+        (WTF::::rehash): Ditto.
+        (WTF::::checkTableConsistency): The assertion for !shouldExpand() was not correct - this
+        function returns true for tables with m_table == 0.
+        (WTF::::checkTableConsistencyExceptSize): Call checkValueConsistency for key. Potentially,
+        we could do the same for values.
+
+        * wtf/HashTraits.h:
+        (WTF::GenericHashTraits::checkValueConsistency): An empty function that can be overridden
+        to add checks. Currently, the only override is for pointer hashes.
+
+        * wtf/RefPtrHashMap.h: (WTF::::remove): Updated for checkTableConsistency renaming.
+
+2010-01-26  Lyon Chen  <liachen@rim.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        Opcode.h use const void* for Opcode cause error #1211 for RVCT compiler
+        https://bugs.webkit.org/show_bug.cgi?id=33902
+
+        * bytecode/Opcode.h:
+
+2010-01-26  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Windows build references non-existent include paths
+        https://bugs.webkit.org/show_bug.cgi?id=34175
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreCommon.vsprops:
+        * JavaScriptCore.vcproj/WTF/WTFCommon.vsprops:
+        * JavaScriptCore.vcproj/jsc/jscCommon.vsprops:
+        * JavaScriptCore.vcproj/testapi/testapi.vcproj:
+        * JavaScriptCore.vcproj/testapi/testapiCommon.vsprops:
+
+2010-01-26  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Geoffrey Garen.
+
+        Using JavaScriptCore API with a webkit vended context can result in slow script dialog
+        https://bugs.webkit.org/show_bug.cgi?id=34172
+
+        Make the APIShim correctly increment and decrement the timeout
+        entry counter.
+
+        * API/APIShims.h:
+        (JSC::APIEntryShimWithoutLock::APIEntryShimWithoutLock):
+        (JSC::APIEntryShimWithoutLock::~APIEntryShimWithoutLock):
+        (JSC::APICallbackShim::APICallbackShim):
+        (JSC::APICallbackShim::~APICallbackShim):
+
+2010-01-26  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        [Qt] Fix compilation of QtScript with non-gcc compilers
+
+        Variable length stack arrays are a gcc extension. Use QVarLengthArray
+        as a more portable solution that still tries to allocate on the stack
+        first.
+
+        * qt/api/qscriptvalue_p.h:
+        (QScriptValuePrivate::call):
+
+2010-01-26  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Reviewed by Tor Arne Vestbø.
+
+        [Qt] Fix the build on platforms without JIT support.
+
+        The JIT support should be determined at compile-time via wtf/Platform.h
+
+        * qt/api/QtScript.pro:
+
+2010-01-26  Jedrzej Nowacki  <jedrzej.nowacki@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        First steps of the QtScript API.
+        
+        Two new classes were created; QScriptEngine and QScriptValue.
+        The first should encapsulate a javascript context and the second a script
+        value.
+        
+        This API is still in development, so it isn't compiled by default.
+        To trigger compilation, pass --qmakearg="CONFIG+=build-qtscript" to
+        build-webkit.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32565
+
+        * qt/api/QtScript.pro: Added.
+        * qt/api/qscriptconverter_p.h: Added.
+        (QScriptConverter::toString):
+        * qt/api/qscriptengine.cpp: Added.
+        (QScriptEngine::QScriptEngine):
+        (QScriptEngine::~QScriptEngine):
+        (QScriptEngine::evaluate):
+        (QScriptEngine::collectGarbage):
+        * qt/api/qscriptengine.h: Added.
+        * qt/api/qscriptengine_p.cpp: Added.
+        (QScriptEnginePrivate::QScriptEnginePrivate):
+        (QScriptEnginePrivate::~QScriptEnginePrivate):
+        (QScriptEnginePrivate::evaluate):
+        * qt/api/qscriptengine_p.h: Added.
+        (QScriptEnginePrivate::get):
+        (QScriptEnginePrivate::collectGarbage):
+        (QScriptEnginePrivate::makeJSValue):
+        (QScriptEnginePrivate::context):
+        * qt/api/qscriptvalue.cpp: Added.
+        (QScriptValue::QScriptValue):
+        (QScriptValue::~QScriptValue):
+        (QScriptValue::isValid):
+        (QScriptValue::isBool):
+        (QScriptValue::isBoolean):
+        (QScriptValue::isNumber):
+        (QScriptValue::isNull):
+        (QScriptValue::isString):
+        (QScriptValue::isUndefined):
+        (QScriptValue::isError):
+        (QScriptValue::isObject):
+        (QScriptValue::isFunction):
+        (QScriptValue::toString):
+        (QScriptValue::toNumber):
+        (QScriptValue::toBool):
+        (QScriptValue::toBoolean):
+        (QScriptValue::toInteger):
+        (QScriptValue::toInt32):
+        (QScriptValue::toUInt32):
+        (QScriptValue::toUInt16):
+        (QScriptValue::call):
+        (QScriptValue::engine):
+        (QScriptValue::operator=):
+        (QScriptValue::equals):
+        (QScriptValue::strictlyEquals):
+        * qt/api/qscriptvalue.h: Added.
+        (QScriptValue::):
+        * qt/api/qscriptvalue_p.h: Added.
+        (QScriptValuePrivate::):
+        (QScriptValuePrivate::get):
+        (QScriptValuePrivate::QScriptValuePrivate):
+        (QScriptValuePrivate::isValid):
+        (QScriptValuePrivate::isBool):
+        (QScriptValuePrivate::isNumber):
+        (QScriptValuePrivate::isNull):
+        (QScriptValuePrivate::isString):
+        (QScriptValuePrivate::isUndefined):
+        (QScriptValuePrivate::isError):
+        (QScriptValuePrivate::isObject):
+        (QScriptValuePrivate::isFunction):
+        (QScriptValuePrivate::toString):
+        (QScriptValuePrivate::toNumber):
+        (QScriptValuePrivate::toBool):
+        (QScriptValuePrivate::toInteger):
+        (QScriptValuePrivate::toInt32):
+        (QScriptValuePrivate::toUInt32):
+        (QScriptValuePrivate::toUInt16):
+        (QScriptValuePrivate::equals):
+        (QScriptValuePrivate::strictlyEquals):
+        (QScriptValuePrivate::assignEngine):
+        (QScriptValuePrivate::call):
+        (QScriptValuePrivate::engine):
+        (QScriptValuePrivate::context):
+        (QScriptValuePrivate::value):
+        (QScriptValuePrivate::object):
+        (QScriptValuePrivate::inherits):
+        (QScriptValuePrivate::isJSBased):
+        (QScriptValuePrivate::isNumberBased):
+        (QScriptValuePrivate::isStringBased):
+        * qt/api/qtscriptglobal.h: Added.
+        * qt/tests/qscriptengine/qscriptengine.pro: Added.
+        * qt/tests/qscriptengine/tst_qscriptengine.cpp: Added.
+        (tst_QScriptEngine::tst_QScriptEngine):
+        (tst_QScriptEngine::~tst_QScriptEngine):
+        (tst_QScriptEngine::init):
+        (tst_QScriptEngine::cleanup):
+        (tst_QScriptEngine::collectGarbage):
+        (tst_QScriptEngine::evaluate):
+        * qt/tests/qscriptvalue/qscriptvalue.pro: Added.
+        * qt/tests/qscriptvalue/tst_qscriptvalue.cpp: Added.
+        (tst_QScriptValue::tst_QScriptValue):
+        (tst_QScriptValue::~tst_QScriptValue):
+        (tst_QScriptValue::init):
+        (tst_QScriptValue::cleanup):
+        (tst_QScriptValue::ctor):
+        (tst_QScriptValue::toString_data):
+        (tst_QScriptValue::toString):
+        (tst_QScriptValue::copyConstructor_data):
+        (tst_QScriptValue::copyConstructor):
+        (tst_QScriptValue::assignOperator_data):
+        (tst_QScriptValue::assignOperator):
+        (tst_QScriptValue::dataSharing):
+        (tst_QScriptValue::constructors_data):
+        (tst_QScriptValue::constructors):
+        (tst_QScriptValue::call):
+        * qt/tests/tests.pri: Added.
+        * qt/tests/tests.pro: Added.
+
+2010-01-25  Dmitry Titov  <dimich@chromium.org>
+
+        Reviewed by David Levin.
+
+        Fix Chromium Linux tests: the pthread functions on Linux produce segfault if they receive 0 thread handle.
+        After r53714, we can have 0 thread handles passed to pthread_join and pthread_detach if corresponding threads
+        were already terminated and their threadMap entries cleared.
+        Add a 0 check.
+
+        * wtf/ThreadingPthreads.cpp:
+        (WTF::waitForThreadCompletion):
+        (WTF::detachThread):
+
+2010-01-24  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        Refactor JITStubs.cpp so that DEFINE_STUB_FUNCTION is only used once for each function
+        https://bugs.webkit.org/show_bug.cgi?id=33866
+
+        Place the guard USE(JSVALUE32_64) inside the body of the DEFINE_STUB_FUNCTION
+        macro for those functions that are always present.
+
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+
+2010-01-22  Kevin Watters  <kevinwatters@gmail.com>
+
+        Reviewed by Kevin Ollivier.
+
+        [wx] Remove the Bakefile build system, which is no longer being used.
+        
+        https://bugs.webkit.org/show_bug.cgi?id=34022
+
+        * JavaScriptCoreSources.bkl: Removed.
+        * jscore.bkl: Removed.
+
+2010-01-22  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=34025
+        Enable client-based Geolocation abstraction for Mac, Windows AppleWebKit targets.
+
+        * Configurations/FeatureDefines.xcconfig:
+
+2010-01-22  Dmitry Titov  <dimich@chromium.org>
+
+        Not reviewed, attempted Snow Leopard build fix.
+
+        * wtf/ThreadingPthreads.cpp: Add a forward declaration of a function which is not 'static'.
+
+2009-01-22  Dmitry Titov  <dimich@chromium.org>
+
+        Reviewed by Maciej Stachowiak.
+
+        Fix the leak of ThreadIdentifiers in threadMap across threads.
+        https://bugs.webkit.org/show_bug.cgi?id=32689
+
+        Test is added to DumpRenderTree.mm.
+
+        * Android.mk: Added file ThreadIdentifierDataPthreads.(h|cpp) to build.
+        * Android.v8.wtf.mk: Ditto.
+        * GNUmakefile.am: Ditto.
+        * JavaScriptCore.gyp/JavaScriptCore.gyp: Ditto.
+        * JavaScriptCore.gypi: Ditto.
+        * JavaScriptCore.xcodeproj/project.pbxproj: Ditto.
+
+        * wtf/ThreadIdentifierDataPthreads.cpp: Added. Contains custom implementation of thread-specific data that uses custom destructor.
+        (WTF::ThreadIdentifierData::~ThreadIdentifierData): Removes the ThreadIdentifier from the threadMap.
+        (WTF::ThreadIdentifierData::identifier):
+        (WTF::ThreadIdentifierData::initialize):
+        (WTF::ThreadIdentifierData::destruct): Custom thread-specific destructor. Resets the value for the key again to cause second invoke.
+        (WTF::ThreadIdentifierData::initializeKeyOnceHelper):
+        (WTF::ThreadIdentifierData::initializeKeyOnce): Need to use pthread_once since initialization may come on any thread(s).
+        * wtf/ThreadIdentifierDataPthreads.h: Added.
+        (WTF::ThreadIdentifierData::ThreadIdentifierData):
+
+        * wtf/Threading.cpp:
+        (WTF::threadEntryPoint): Move initializeCurrentThreadInternal to after the lock to make
+                                 sure it is invoked when ThreadIdentifier is already established.
+
+        * wtf/Threading.h: Rename setThreadNameInternal -> initializeCurrentThreadInternal since it does more then only set the name now.
+        * wtf/ThreadingNone.cpp:
+        (WTF::initializeCurrentThreadInternal): Ditto.
+        * wtf/ThreadingWin.cpp:
+        (WTF::initializeCurrentThreadInternal): Ditto.
+        (WTF::initializeThreading): Ditto.
+        * wtf/gtk/ThreadingGtk.cpp:
+        (WTF::initializeCurrentThreadInternal): Ditto.
+        * wtf/qt/ThreadingQt.cpp:
+        (WTF::initializeCurrentThreadInternal): Ditto.
+
+        * wtf/ThreadingPthreads.cpp:
+        (WTF::establishIdentifierForPthreadHandle):
+        (WTF::clearPthreadHandleForIdentifier): Make it not 'static' so the ~ThreadIdentifierData() in another file can call it.
+        (WTF::initializeCurrentThreadInternal): Set the thread-specific data. The ThreadIdentifier is already established by creating thread.
+        (WTF::waitForThreadCompletion): Remove call to clearPthreadHandleForIdentifier(threadID) since it is now done in ~ThreadIdentifierData().
+        (WTF::detachThread): Ditto.
+        (WTF::currentThread): Use the thread-specific data to get the ThreadIdentifier. It's many times faster then Mutex-protected iteration through the map.
+                              Also, set the thread-specific data if called first time on the thread.
+
+2010-01-21  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Alexey Proskuryakov.
+
+        Add ThreadSpecific for ENABLE(SINGLE_THREADED)
+        https://bugs.webkit.org/show_bug.cgi?id=33878
+
+        Implement ThreadSpecific with a simple getter/setter
+        when ENABLE(SINGLE_THREADED) is true.
+
+        Due to the change in https://bugs.webkit.org/show_bug.cgi?id=33236,
+        an implementation of ThreadSpecific must be available to build WebKit.
+        This causes a build failure for platforms without a proper
+        ThreadSpecific implementation.
+
+        * wtf/ThreadSpecific.h:
+        (WTF::::ThreadSpecific):
+        (WTF::::~ThreadSpecific):
+        (WTF::::get):
+        (WTF::::set):
+        (WTF::::destroy):
+
+2010-01-21  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Maciej Stachowiak.
+
+        Add fastStrDup to FastMalloc
+        https://bugs.webkit.org/show_bug.cgi?id=33937
+
+        The new string returned by fastStrDup is obtained with fastMalloc,
+        and can be freed with fastFree. This makes the memory management 
+        more consistent because we don't need to keep strdup allocated pointers
+        and free them with free(). Instead we can use fastFree everywhere.
+
+        * wtf/FastMalloc.cpp:
+        (WTF::fastStrDup):
+        * wtf/FastMalloc.h:
+
+2010-01-21  Brady Eidson  <beidson@apple.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        history.back() for same-document history traversals isn't synchronous as the specification states.
+        <rdar://problem/7535011> and https://bugs.webkit.org/show_bug.cgi?id=33538
+
+        * wtf/Platform.h: Add a "HISTORY_ALWAYS_ASYNC" enable and turn it on for Chromium.
+
+2010-01-21  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Always create a prototype for automatically managed classes.
+        
+        This fixes some errors where prototype chains were not correctly hooked
+        up, and also ensures that API classes work correctly with features like
+        instanceof.
+
+        * API/JSClassRef.cpp:
+        (OpaqueJSClass::create): Cleaned up some of this code. Also changed it
+        to always create a prototype class.
+
+        * API/tests/testapi.c:
+        (Derived2_class):
+        (main): Fixed a null value crash in the exception checking code.
+        * API/tests/testapi.js: Added some tests for the case where a prototype
+        chain would not be hooked up correctly.
+
+2010-01-21  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Geoff Garen.
+
+        Force JSC to create a prototype chain for API classes with a
+        parent class but no static functions.
+
+        * API/JSClassRef.cpp:
+        (OpaqueJSClass::create):
+
+2010-01-21  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Geoffrey Garen.
+
+        Object.getOwnPropertyDescriptor always returns undefined for JS API objects
+        https://bugs.webkit.org/show_bug.cgi?id=33946
+
+        Ideally the getOwnPropertyDescriptor() reimplementation should return an
+        access descriptor that wraps the property getter and setter callbacks, but
+        that approach is much more involved than returning a value descriptor.
+        Keep it simple for now.
+
+        * API/JSCallbackObject.h:
+        * API/JSCallbackObjectFunctions.h:
+        (JSC::::getOwnPropertyDescriptor):
+        * API/tests/testapi.js:
+
+2010-01-20  Mark Rowe  <mrowe@apple.com>
+
+        Build fix.
+
+        * wtf/FastMalloc.cpp:
+        (WTF::TCMalloc_PageHeap::initializeScavenger): Remove unnecessary function call.
+
+2010-01-20  Mark Rowe  <mrowe@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Use the inline i386 assembly for x86_64 as well rather than falling back to using pthread mutexes.
+
+        * wtf/TCSpinLock.h:
+        (TCMalloc_SpinLock::Lock):
+        (TCMalloc_SpinLock::Unlock):
+        (TCMalloc_SlowLock):
+
+2010-01-20  Mark Rowe  <mrowe@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        <rdar://problem/7215063> Use GCD instead of an extra thread for FastMalloc scavenging on platforms where it is supported
+
+        Abstract the background scavenging slightly so that an alternate implementation that uses GCD can be used on platforms
+        where it is supported.
+
+        * wtf/FastMalloc.cpp:
+        (WTF::TCMalloc_PageHeap::init):
+        (WTF::TCMalloc_PageHeap::initializeScavenger):
+        (WTF::TCMalloc_PageHeap::signalScavenger):
+        (WTF::TCMalloc_PageHeap::shouldContinueScavenging):
+        (WTF::TCMalloc_PageHeap::Delete):
+        (WTF::TCMalloc_PageHeap::periodicScavenge):
+        * wtf/Platform.h:
+
+2010-01-20  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        <rdar://problem/7562708> REGRESSION(53460): Heap::destroy may not run
+        all destructors
+
+        * runtime/Collector.cpp:
+        (JSC::Heap::freeBlocks): Instead of fully marking protected objects,
+        just set their mark bits. This prevents protected objects from keeping
+        unprotected objects alive. Destructor order is not guaranteed, so it's
+        OK to destroy objects pointed to by protected objects before destroying
+        protected objects.
+
+2010-01-19  David Levin  <levin@chromium.org>
+
+        Reviewed by Oliver Hunt.
+
+        CrossThreadCopier needs to support ThreadSafeShared better.
+        https://bugs.webkit.org/show_bug.cgi?id=33698
+
+        * wtf/TypeTraits.cpp: Added tests for the new type traits.
+        * wtf/TypeTraits.h:
+        (WTF::IsSubclass): Determines if a class is a derived from another class.
+        (WTF::IsSubclassOfTemplate): Determines if a class is a derived from a
+        template class (with one parameter that is unknown).
+        (WTF::RemoveTemplate): Reveals the type for a template parameter.
+
+2010-01-20  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Darin Adler and Adam Roben.
+
+        Feature defines are difficult to maintain on Windows builds
+        https://bugs.webkit.org/show_bug.cgi?id=33883
+
+        FeatureDefines.vsprops are now maintained in a way similar to
+        Configurations/FeatureDefines.xcconfig, with the added advantage
+        of having a single FeatureDefines file across all projects.
+
+        * Configurations/FeatureDefines.xcconfig: Add comments about keeping feature definitions in sync.
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj: Add FeatureDefines.vsprops inherited property sheet.
+        * JavaScriptCore.vcproj/WTF/WTF.vcproj: Add FeatureDefines.vsprops inherited property sheet.
+
+2010-01-20  Csaba Osztrogonác  <ossy@webkit.org>
+
+        [Qt] Unreviewed buildfix for r53547.
+
+        * DerivedSources.pro:
+
+2010-01-20  Tor Arne Vestbø  <tor.arne.vestbo@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Make extraCompilers for generated sources depend on their scripts
+
+        * DerivedSources.pro:
+
+2010-01-19  Brian Weinstein  <bweinstein@apple.com>
+
+        Reviewed by Tim Hatcher.
+
+        When JavaScriptCore calls Debugger::Exception, have it pass a
+        hasHandler variable that represents if exception is being handled
+        in the same function (not in a parent on the call stack).
+        
+        This just adds a new parameter, no behavior is changed.
+
+        * debugger/Debugger.h:
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::throwException):
+
+2010-01-18  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Adam Barth.
+
+        Inline functions that are hot in DOM manipulation
+        https://bugs.webkit.org/show_bug.cgi?id=33820
+        
+        (3% speedup on Dromaeo DOM Core tests)
+
+        * runtime/WeakGCMap.h:
+        (JSC::::get): inline
+
+2010-01-19  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Unreviewed build fix for JIT with RVCT.
+
+        Remove IMPORT statement; cti_vm_throw is already defined in JITStubs.h.
+        Remove extra ')'.
+
+        * jit/JITStubs.cpp:
+        (JSC::ctiVMThrowTrampoline):
+
+2010-01-19  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        REGRESSION (52082): Crash on worker thread when reloading http://radnan.public.iastate.edu/procedural/
+        https://bugs.webkit.org/show_bug.cgi?id=33826
+
+        This bug was caused by a GC-protected object being destroyed early by
+        Heap::destroy. Clients of the GC protect APIs (reasonably) expect pointers
+        to GC-protected memory to be valid.
+
+        The solution is to do two passes of tear-down in Heap::destroy. The first
+        pass tears down all unprotected objects. The second pass ASSERTs that all
+        previously protected objects are now unprotected, and then tears down
+        all perviously protected objects. These two passes simulate the two passes
+        that would have been required to free a protected object during normal GC.
+        
+        * API/JSContextRef.cpp: Removed some ASSERTs that have moved into Heap.
+
+        * runtime/Collector.cpp:
+        (JSC::Heap::destroy): Moved ASSERTs to here.
+        (JSC::Heap::freeBlock): Tidied up the use of didShrink by moving its
+        setter to the function that does the shrinking.
+        (JSC::Heap::freeBlocks): Implemented above algorithm.
+        (JSC::Heap::shrinkBlocks): Tidied up the use of didShrink.
+
+2010-01-19  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (build fix).
+
+        Reverting r53455, breaks 2 javascriptcore tests.
+
+        * API/JSContextRef.cpp:
+        * runtime/Collector.cpp:
+        (JSC::Heap::destroy):
+        (JSC::Heap::freeBlock):
+        (JSC::Heap::freeBlocks):
+        (JSC::Heap::shrinkBlocks):
+
+2010-01-18  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (build fix).
+
+        Revert r53454, since it causes much sadness in this world.
+
+        * runtime/UString.cpp:
+        (JSC::UString::spliceSubstringsWithSeparators):
+        (JSC::UString::replaceRange):
+        * runtime/UStringImpl.cpp:
+        (JSC::UStringImpl::baseSharedBuffer):
+        (JSC::UStringImpl::sharedBuffer):
+        (JSC::UStringImpl::~UStringImpl):
+        * runtime/UStringImpl.h:
+        (JSC::UntypedPtrAndBitfield::UntypedPtrAndBitfield):
+        (JSC::UntypedPtrAndBitfield::asPtr):
+        (JSC::UntypedPtrAndBitfield::operator&=):
+        (JSC::UntypedPtrAndBitfield::operator|=):
+        (JSC::UntypedPtrAndBitfield::operator&):
+        (JSC::UStringImpl::create):
+        (JSC::UStringImpl::cost):
+        (JSC::UStringImpl::isIdentifier):
+        (JSC::UStringImpl::setIsIdentifier):
+        (JSC::UStringImpl::ref):
+        (JSC::UStringImpl::deref):
+        (JSC::UStringImpl::checkConsistency):
+        (JSC::UStringImpl::UStringImpl):
+        (JSC::UStringImpl::bufferOwnerString):
+        (JSC::UStringImpl::bufferOwnership):
+        (JSC::UStringImpl::isStatic):
+        * wtf/StringHashFunctions.h:
+        (WTF::stringHash):
+
+2010-01-18  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        REGRESSION (52082): Crash on worker thread when reloading http://radnan.public.iastate.edu/procedural/
+        https://bugs.webkit.org/show_bug.cgi?id=33826
+
+        This bug was caused by a GC-protected object being destroyed early by
+        Heap::destroy. Clients of the GC protect APIs (reasonably) expect pointers
+        to GC-protected memory to be valid.
+
+        The solution is to do two passes of tear-down in Heap::destroy. The first
+        pass tears down all unprotected objects. The second pass ASSERTs that all
+        previously protected objects are now unprotected, and then tears down
+        all perviously protected objects. These two passes simulate the two passes
+        that would have been required to free a protected object during normal GC.
+        
+        * API/JSContextRef.cpp: Removed some ASSERTs that have moved into Heap.
+
+        * runtime/Collector.cpp:
+        (JSC::Heap::destroy): Moved ASSERTs to here.
+        (JSC::Heap::freeBlock): Tidied up the use of didShrink by moving its
+        setter to the function that does the shrinking.
+        (JSC::Heap::freeBlocks): Implemented above algorithm.
+        (JSC::Heap::shrinkBlocks): Tidied up the use of didShrink.
+
+2010-01-18  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33731
+        Remove UntypedPtrAndBitfield from UStringImpl (akin to PtrAndFlags).
+
+        This break the OS X Leaks tool.  Instead, free up some more bits from the refCount.
+
+        * runtime/UStringImpl.cpp:
+        (JSC::UStringImpl::sharedBuffer):
+        (JSC::UStringImpl::~UStringImpl):
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::cost):
+        (JSC::UStringImpl::checkConsistency):
+        (JSC::UStringImpl::UStringImpl):
+        (JSC::UStringImpl::bufferOwnerString):
+        (JSC::UStringImpl::):
+        * wtf/StringHashFunctions.h:
+        (WTF::stringHash):
+
+2010-01-18  Kent Tamura  <tkent@chromium.org>
+
+        Reviewed by Darin Adler.
+
+        HTMLInputElement::valueAsDate setter support for type=month.
+        https://bugs.webkit.org/show_bug.cgi?id=33021
+
+        Expose the following functions to be used by WebCore:
+         - WTF::msToyear()
+         - WTF::dayInYear()
+         - WTF::monthFromDayInYear()
+         - WTF::dayInMonthFromDayInYear()
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * wtf/DateMath.cpp:
+        (WTF::msToYear): Remove "static inline".
+        (WTF::dayInYear): Remove "static inline".
+        (WTF::monthFromDayInYear): Remove "static inline".
+        (WTF::dayInMonthFromDayInYear): Remove "static inline".
+        * wtf/DateMath.h: Declare the above functions.
+
+2010-01-18  Darin Adler  <darin@apple.com>
+
+        Fix build by reverting the previous change.
+
+        * runtime/UString.h: Rolled out the FastAllocBase base class.
+        It was making UString larger, and therefore JSString larger,
+        and too big for a garbage collection cell.
+
+        This raises the unpleasant possibility that many classes became
+        larger because we added the FastAllocBase base class. I am
+        worried about this, and it needs to be investigated.
+
+2010-01-18  Zoltan Horvath  <zoltan@webkit.org>
+
+        Reviewed by Darin Adler.
+
+        Allow custom memory allocation control for UString class
+        https://bugs.webkit.org/show_bug.cgi?id=27831
+
+        Inherits the following class from FastAllocBase because it is
+        instantiated by 'new' and no need to be copyable:
+
+        class name     - instantiated at:
+        classs UString - JavaScriptCore/runtime/UString.cpp:160
+
+        * runtime/UString.h:
+
+2010-01-18  Evan Cheng  <evan.cheng@apple.com>
+
+        Reviewed by Darin Adler.
+
+        Add some ALWAYS_INLINE for key functions not inlined by some versions of GCC.
+        rdar://problem/7553780
+
+        * runtime/JSObject.h:
+        (JSC::JSObject::getPropertySlot): ALWAYS_INLINE both overloads.
+        * runtime/JSString.h:
+        (JSC::JSString::JSString): ALWAYS_INLINE the version that takes a UString.
+        * runtime/UString.h:
+        (JSC::operator==): ALWAYS_INLINE the version that compares two UString objects.
+
+2010-01-18  Csaba Osztrogonác  <ossy@webkit.org>
+
+        Reviewed by Darin Adler.
+
+        Delete dftables-xxxxxxxx.in files automatically.
+        https://bugs.webkit.org/show_bug.cgi?id=33796
+
+        * pcre/dftables: unlink unnecessary temporary file.
+
+2010-01-18  Tor Arne Vestbø  <tor.arne.vestbo@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Force qmake to generate a single makefile for DerivedSources.pro
+
+        * DerivedSources.pro:
+
+2010-01-18  Csaba Osztrogonác  <ossy@webkit.org>
+
+        Rubber-stamped by Gustavo Noronha Silva.
+
+        Rolling out r53391 and r53392 because of random crashes on buildbots.
+        https://bugs.webkit.org/show_bug.cgi?id=33731
+
+        * bytecode/CodeBlock.h:
+        (JSC::CallLinkInfo::seenOnce):
+        (JSC::CallLinkInfo::setSeen):
+        (JSC::MethodCallLinkInfo::MethodCallLinkInfo):
+        (JSC::MethodCallLinkInfo::seenOnce):
+        (JSC::MethodCallLinkInfo::setSeen):
+        * jit/JIT.cpp:
+        (JSC::JIT::unlinkCall):
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::patchMethodCallProto):
+        * runtime/UString.cpp:
+        (JSC::UString::spliceSubstringsWithSeparators):
+        (JSC::UString::replaceRange):
+        * runtime/UString.h:
+        * runtime/UStringImpl.cpp:
+        (JSC::UStringImpl::baseSharedBuffer):
+        (JSC::UStringImpl::sharedBuffer):
+        (JSC::UStringImpl::~UStringImpl):
+        * runtime/UStringImpl.h:
+        (JSC::UntypedPtrAndBitfield::UntypedPtrAndBitfield):
+        (JSC::UntypedPtrAndBitfield::asPtr):
+        (JSC::UntypedPtrAndBitfield::operator&=):
+        (JSC::UntypedPtrAndBitfield::operator|=):
+        (JSC::UntypedPtrAndBitfield::operator&):
+        (JSC::UStringImpl::create):
+        (JSC::UStringImpl::cost):
+        (JSC::UStringImpl::isIdentifier):
+        (JSC::UStringImpl::setIsIdentifier):
+        (JSC::UStringImpl::ref):
+        (JSC::UStringImpl::deref):
+        (JSC::UStringImpl::checkConsistency):
+        (JSC::UStringImpl::UStringImpl):
+        (JSC::UStringImpl::bufferOwnerString):
+        (JSC::UStringImpl::bufferOwnership):
+        (JSC::UStringImpl::isStatic):
+        * wtf/StringHashFunctions.h:
+        (WTF::stringHash):
+
+2010-01-18  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        Fix the build with strict gcc and RVCT versions: It's not legal to cast a
+        pointer to a function to a void* without an intermediate cast to a non-pointer
+        type. A cast to a ptrdiff_t inbetween fixes it.
+
+        * runtime/JSString.h:
+        (JSC::Fiber::JSString):
+
+2010-01-15  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33731
+        Remove UntypedPtrAndBitfield from UStringImpl (akin to PtrAndFlags).
+
+        This break the OS X Leaks tool.  Instead, free up some more bits from the refCount.
+
+        * runtime/UStringImpl.cpp:
+        (JSC::UStringImpl::sharedBuffer):
+        (JSC::UStringImpl::~UStringImpl):
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::cost):
+        (JSC::UStringImpl::checkConsistency):
+        (JSC::UStringImpl::UStringImpl):
+        (JSC::UStringImpl::bufferOwnerString):
+        (JSC::UStringImpl::):
+        * wtf/StringHashFunctions.h:
+        (WTF::stringHash):
+
+2010-01-15  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33731
+        Remove uses of PtrAndFlags from JIT data stuctures.
+
+        These break the OS X Leaks tool.  Free up a bit in CallLinkInfo, and invalid
+        permutation of pointer states in MethodCallLinkInfo to represent the removed bits.
+
+        * bytecode/CodeBlock.h:
+        (JSC::CallLinkInfo::seenOnce):
+        (JSC::CallLinkInfo::setSeen):
+        (JSC::MethodCallLinkInfo::MethodCallLinkInfo):
+        (JSC::MethodCallLinkInfo::seenOnce):
+        (JSC::MethodCallLinkInfo::setSeen):
+        * jit/JIT.cpp:
+        (JSC::JIT::unlinkCall):
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::patchMethodCallProto):
+        * runtime/UString.h:
+
+2010-01-16  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Cache JS string values made from DOM strings (Dromaeo speedup)
+        https://bugs.webkit.org/show_bug.cgi?id=33768
+        <rdar://problem/7353576>
+
+        * runtime/JSString.h:
+        (JSC::jsStringWithFinalizer): Added new mechanism for a string to have an optional
+        finalizer callback, for the benefit of weak-referencing caches.
+        (JSC::):
+        (JSC::Fiber::JSString):
+        (JSC::Fiber::~JSString):
+        * runtime/JSString.cpp:
+        (JSC::JSString::resolveRope): Clear fibers so this doesn't look like a string with a finalizer.
+        * runtime/WeakGCMap.h: Include "Collector.h" to make this header includable by itself.
+
+2010-01-15  Sam Weinig  <sam@webkit.org>
+
+        Reviewed by Maciej Stachowiak.
+
+        Fix for <rdar://problem/7548432>
+        Add ALWAYS_INLINE to jsLess for a 1% speedup on llvm-gcc.
+
+        * runtime/Operations.h:
+        (JSC::jsLess):
+
+2010-01-14  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        REGRESISON: Google maps buttons not working properly
+        https://bugs.webkit.org/show_bug.cgi?id=31871
+
+        REGRESSION(r52948): JavaScript exceptions thrown on Google Maps when
+        getting directions for a second time
+        https://bugs.webkit.org/show_bug.cgi?id=33446
+        
+        SunSpider and v8 report no change.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::tryCacheGetByID): Update our cached offset in case
+        flattening the dictionary changed any of its offsets.
+
+        * jit/JITStubs.cpp:
+        (JSC::JITThunks::tryCacheGetByID):
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/Operations.h:
+        (JSC::normalizePrototypeChain): ditto
+
+2010-01-14  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33705
+        UStringImpl::create() should use internal storage
+
+        When creating a UStringImpl copying of a UChar*, we can use an internal buffer,
+        by calling UStringImpl::tryCreateUninitialized().
+
+        Also, remove duplicate of copyChars from JSString, call UStringImpl's version.
+
+        Small (max 0.5%) progression on Sunspidey.
+
+        * runtime/JSString.cpp:
+        (JSC::JSString::resolveRope):
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::create):
+
+2010-01-14  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Make naming & behaviour of UString[Impl] methods more consistent.
+        https://bugs.webkit.org/show_bug.cgi?id=33702
+
+        UString::create() creates a copy of the UChar* passed, but UStringImpl::create() assumes
+        that it should assume ownership of the provided buffer (with UString::createNonCopying()
+        and UStringImpl::createCopying() providing the alternate behaviours).  Unify on create()
+        taking a copy of the provided buffer.  For non-copying cases, use the name 'adopt', and
+        make this method take a Vector<UChar>&.  For cases where non-copying construction was being
+        used, other than from a Vector<UChar>, change the code to allocate the storage along with
+        the UStringImpl using UStringImpl::createUninitialized().  (The adopt() method also more
+        closely matches that of WebCore::StringImpl).
+
+        Also, UString::createUninitialized() and UStringImpl::createUninitialized() have incompatible
+        behaviours, in that the UString form sets the provided UChar* to a null or non-null value to
+        indicate success or failure, but UStringImpl uses the returned PassRefPtr<UStringImpl> to
+        indicate when allocation has failed (potentially leaving the output Char* uninitialized).
+        This is also incompatible with WebCore::StringImpl's behaviour, in that
+        StringImpl::createUninitialized() will CRASH() if unable to allocate.  Some uses of
+        createUninitialized() in JSC are unsafe, since they do not test the result for null.
+        UStringImpl's indication is preferable, since we may want a successful call to set the result
+        buffer to 0 (specifically, StringImpl returns 0 for the buffer where createUninitialized()
+        returns the empty string, which seems reasonable to catch bugs early).  UString's method
+        cannot support UStringImpl's behaviour directly, since it returns an object rather than a
+        pointer.
+            - remove UString::createUninitialized(), replace with calls to UStringImpl::createUninitialized()
+            - create a UStringImpl::tryCreateUninitialized() form UStringImpl::createUninitialized(),
+              with current behaviour, make createUninitialized() crash on failure to allocate.
+            - make cases in JSC that do not check the result call createUninitialized(), and cases that do
+              check call tryCreateUninitialized().
+
+        Rename computedHash() to existingHash(), to bring this in line wih WebCore::StringImpl.
+
+        * API/JSClassRef.cpp:
+        (OpaqueJSClassContextData::OpaqueJSClassContextData):
+        * JavaScriptCore.exp:
+        * runtime/ArrayPrototype.cpp:
+        (JSC::arrayProtoFuncToString):
+        * runtime/Identifier.cpp:
+        (JSC::CStringTranslator::translate):
+        (JSC::UCharBufferTranslator::translate):
+        * runtime/JSString.cpp:
+        (JSC::JSString::resolveRope):
+        * runtime/Lookup.cpp:
+        (JSC::HashTable::createTable):
+        * runtime/Lookup.h:
+        (JSC::HashTable::entry):
+        * runtime/StringBuilder.h:
+        (JSC::StringBuilder::release):
+        * runtime/StringConstructor.cpp:
+        (JSC::stringFromCharCodeSlowCase):
+        * runtime/StringPrototype.cpp:
+        (JSC::substituteBackreferencesSlow):
+        (JSC::stringProtoFuncToLowerCase):
+        (JSC::stringProtoFuncToUpperCase):
+        (JSC::stringProtoFuncFontsize):
+        (JSC::stringProtoFuncLink):
+        * runtime/Structure.cpp:
+        (JSC::Structure::despecifyDictionaryFunction):
+        (JSC::Structure::get):
+        (JSC::Structure::despecifyFunction):
+        (JSC::Structure::put):
+        (JSC::Structure::remove):
+        (JSC::Structure::insertIntoPropertyMapHashTable):
+        (JSC::Structure::checkConsistency):
+        * runtime/Structure.h:
+        (JSC::Structure::get):
+        * runtime/StructureTransitionTable.h:
+        (JSC::StructureTransitionTableHash::hash):
+        * runtime/UString.cpp:
+        (JSC::createRep):
+        (JSC::UString::UString):
+        (JSC::UString::spliceSubstringsWithSeparators):
+        (JSC::UString::replaceRange):
+        (JSC::UString::operator=):
+        * runtime/UString.h:
+        (JSC::UString::adopt):
+        (JSC::IdentifierRepHash::hash):
+        (JSC::makeString):
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::adopt):
+        (JSC::UStringImpl::create):
+        (JSC::UStringImpl::createUninitialized):
+        (JSC::UStringImpl::tryCreateUninitialized):
+        (JSC::UStringImpl::existingHash):
+
+2010-01-13  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Oliver Hunt.
+
+        JSON.stringify and JSON.parse needlessly process properties in the prototype chain
+        https://bugs.webkit.org/show_bug.cgi?id=33053
+
+        * runtime/JSONObject.cpp:
+        (JSC::Stringifier::Holder::appendNextProperty):
+        (JSC::Walker::walk):
+
+2010-01-13  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (buildfix).
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2010-01-13  Alexey Proskuryakov  <ap@apple.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33641
+        Assertion failure in Lexer.cpp if input stream ends while in string escape
+
+        Test: fast/js/end-in-string-escape.html
+
+        * parser/Lexer.cpp: (JSC::Lexer::lex): Bail out quickly on end of stream, not giving the
+        assertion a chance to fire.
+
+2010-01-13  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (buildfix).
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2010-01-13  Gavin Barraclough  <barraclough@apple.com>
+
+        Rubber stamped by Sam Weinig & Darin Adler.
+
+        Three quick fixes to UStringImpl.
+            - The destroy() method can be switched back to a normal destructor; since we've switched
+              the way we protect static strings to be using an odd ref-count the destroy() won't abort.
+            - The cost() calculation logic was wrong.  If you have multiple JSStrings wrapping substrings
+              of a base string, they would each report the full cost of the base string to the heap.
+              Instead we should only be reporting once for the base string.
+            - Remove the overloaded new operator calling fastMalloc, replace this with a 'using' to pick
+              up the implementation from the parent class.
+
+        * JavaScriptCore.exp:
+        * runtime/UStringImpl.cpp:
+        (JSC::UStringImpl::~UStringImpl):
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::cost):
+        (JSC::UStringImpl::deref):
+
+2010-01-13  Jocelyn Turcotte  <jocelyn.turcotte@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Split the build process in two different .pro files.
+        This allows qmake to be run once all source files are available.
+
+        * DerivedSources.pro: Added.
+        * JavaScriptCore.pri: Moved source generation to DerivedSources.pro
+        * pcre/pcre.pri: Moved source generation to DerivedSources.pro
+
+2010-01-12  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Geoffrey Garen.
+
+        [ES5] Implement Object.getOwnPropertyNames
+        https://bugs.webkit.org/show_bug.cgi?id=32242
+
+        Add an extra argument to getPropertyNames() and getOwnPropertyNames()
+        (and all reimplementations thereof) that indicates whether non-enumerable
+        properties should be added.
+
+        * API/JSCallbackObject.h:
+        * API/JSCallbackObjectFunctions.h:
+        (JSC::::getOwnPropertyNames):
+        * JavaScriptCore.exp:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * debugger/DebuggerActivation.cpp:
+        (JSC::DebuggerActivation::getOwnPropertyNames):
+        * debugger/DebuggerActivation.h:
+        * runtime/Arguments.cpp:
+        (JSC::Arguments::getOwnPropertyNames):
+        * runtime/Arguments.h:
+        * runtime/CommonIdentifiers.h:
+        * runtime/JSArray.cpp:
+        (JSC::JSArray::getOwnPropertyNames):
+        * runtime/JSArray.h:
+        * runtime/JSByteArray.cpp:
+        (JSC::JSByteArray::getOwnPropertyNames):
+        * runtime/JSByteArray.h:
+        * runtime/JSFunction.cpp:
+        (JSC::JSFunction::getOwnPropertyNames):
+        * runtime/JSFunction.h:
+        * runtime/JSNotAnObject.cpp:
+        (JSC::JSNotAnObject::getOwnPropertyNames):
+        * runtime/JSNotAnObject.h:
+        * runtime/JSObject.cpp:
+        (JSC::getClassPropertyNames):
+        (JSC::JSObject::getPropertyNames):
+        (JSC::JSObject::getOwnPropertyNames):
+        * runtime/JSObject.h:
+        * runtime/JSVariableObject.cpp:
+        (JSC::JSVariableObject::getOwnPropertyNames):
+        * runtime/JSVariableObject.h:
+        * runtime/ObjectConstructor.cpp:
+        (JSC::ObjectConstructor::ObjectConstructor):
+        (JSC::objectConstructorGetOwnPropertyNames):
+        * runtime/RegExpMatchesArray.h:
+        (JSC::RegExpMatchesArray::getOwnPropertyNames):
+        * runtime/StringObject.cpp:
+        (JSC::StringObject::getOwnPropertyNames):
+        * runtime/StringObject.h:
+        * runtime/Structure.cpp: Rename getEnumerablePropertyNames() to getPropertyNames(), which takes an extra argument.
+        (JSC::Structure::getPropertyNames):
+        * runtime/Structure.h:
+        (JSC::):
+
+2010-01-12  Alexey Proskuryakov  <ap@apple.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33540
+        Make it possible to build in debug mode with assertions disabled
+
+        * jit/JITStubs.cpp: (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/Identifier.cpp: (JSC::Identifier::checkSameIdentifierTable):
+        * wtf/FastMalloc.cpp:
+        * wtf/HashTable.h: (WTF::HashTableConstIterator::checkValidity):
+        * yarr/RegexCompiler.cpp: (JSC::Yarr::compileRegex):
+
+2009-11-23  Yong Li  <yoli@rim.com>
+
+        Reviewed by Adam Treat.
+
+        Make GIF decoder support down-sampling
+        https://bugs.webkit.org/show_bug.cgi?id=31806
+
+        * platform/image-decoders/ImageDecoder.cpp:
+        (WebCore::ImageDecoder::upperBoundScaledY):
+        (WebCore::ImageDecoder::lowerBoundScaledY):
+        * platform/image-decoders/ImageDecoder.h:
+        (WebCore::RGBA32Buffer::scaledRect):
+        (WebCore::RGBA32Buffer::setScaledRect):
+        (WebCore::ImageDecoder::scaledSize):
+        * platform/image-decoders/gif/GIFImageDecoder.cpp:
+        (WebCore::GIFImageDecoder::sizeNowAvailable):
+        (WebCore::GIFImageDecoder::initFrameBuffer):
+        (WebCore::copyOnePixel):
+        (WebCore::GIFImageDecoder::haveDecodedRow):
+        (WebCore::GIFImageDecoder::frameComplete):
+
+2010-01-12  Adam Barth  <abarth@webkit.org>
+
+        Reviewed by Eric Seidel.
+
+        ecma/Date/15.9.5.12-1.js fails every night at midnight
+        https://bugs.webkit.org/show_bug.cgi?id=28041
+
+        Change the test to use a concrete time instead of "now".
+
+        * tests/mozilla/ecma/Date/15.9.5.10-1.js:
+        * tests/mozilla/ecma/Date/15.9.5.12-1.js:
+
+2010-01-11  Csaba Osztrogonác  <ossy@webkit.org>
+
+        Reviewed by Ariya Hidayat.
+
+        [Qt] Enable JIT and YARR_JIT if (CPU(X86_64) && OS(LINUX) && GCC_VERSION >= 40100)
+
+        * wtf/Platform.h:
+
+2010-01-11  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Alexey Proskuryakov.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33481
+        Uninitialized data members in ArrayStorage
+        
+        SunSpider reports no change.
+
+        * runtime/JSArray.cpp:
+        (JSC::JSArray::JSArray): Initialize missing data members in the two cases
+        where we don't use fastZeroedMalloc, so it doesn't happen automatically.
+
+2010-01-11  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33480
+        
+        Improve debugging reliability for WTF on Windows.
+        Store WTF static library's PDB file into a better location.
+
+        * JavaScriptCore.vcproj/WTF/WTF.vcproj:
+
+2010-01-11  Steve Falkenburg  <sfalken@apple.com>
+
+        Windows build fix.
+        Remove extraneous entries from def file causing build warning.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2010-01-10  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        RegExp.prototype.toString returns "//" for empty regular expressions
+        https://bugs.webkit.org/show_bug.cgi?id=33319
+
+        "//" starts a single-line comment, hence "/(?:)/" should be used, according to ECMA.
+
+        * runtime/RegExpPrototype.cpp:
+        (JSC::regExpProtoFuncToString):
+
+        * tests/mozilla/ecma_2/RegExp/properties-001.js:
+        (AddRegExpCases):
+        * tests/mozilla/js1_2/regexp/toString.js:
+        Update relevant Mozilla tests (Mozilla has had this behavior since November 2003).
+
+2010-01-10  Darin Adler  <darin@apple.com>
+
+        * tests/mozilla/ecma/Array/15.4.1.1.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.1.2.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.2.1-1.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.2.2-1.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.2.2-2.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.2.3.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.3.2.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.3.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.4.1.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Array/15.4.4.js: Added property allow-tabs.
+        * tests/mozilla/ecma/LexicalConventions/7.7.4.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Math/15.8.2.13.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Math/15.8.2.16.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Math/15.8.2.18.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Math/15.8.2.2.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Math/15.8.2.4.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Math/15.8.2.5.js: Added property allow-tabs.
+        * tests/mozilla/ecma/Math/15.8.2.7.js: Added property allow-tabs.
+        * tests/mozilla/ecma/String/15.5.1.js: Added property allow-tabs.
+        * tests/mozilla/ecma/String/15.5.2.js: Added property allow-tabs.
+        * tests/mozilla/ecma/String/15.5.3.1-3.js: Added property allow-tabs.
+        * tests/mozilla/ecma/String/15.5.3.1-4.js: Added property allow-tabs.
+        * tests/mozilla/ecma/String/15.5.3.js: Added property allow-tabs.
+        * tests/mozilla/ecma/TypeConversion/9.5-2.js: Added property allow-tabs.
+        * tests/mozilla/ecma/jsref.js: Modified property allow-tabs.
+        * tests/mozilla/ecma/shell.js: Modified property allow-tabs.
+        * tests/mozilla/ecma_2/LexicalConventions/keywords-001.js: Added property allow-tabs.
+        * tests/mozilla/ecma_2/RegExp/exec-001.js: Added property allow-tabs.
+        * tests/mozilla/ecma_2/String/match-004.js: Added property allow-tabs.
+        * tests/mozilla/ecma_2/String/replace-001.js: Added property allow-tabs.
+        * tests/mozilla/ecma_2/String/split-002.js: Added property allow-tabs.
+        * tests/mozilla/ecma_2/jsref.js: Modified property allow-tabs.
+        * tests/mozilla/ecma_2/shell.js: Added property allow-tabs.
+        * tests/mozilla/ecma_3/Date/shell.js: Modified property allow-tabs.
+        * tests/mozilla/ecma_3/Exceptions/regress-181654.js: Added property allow-tabs.
+        * tests/mozilla/ecma_3/RegExp/regress-209067.js: Added property allow-tabs.
+        * tests/mozilla/ecma_3/RegExp/regress-85721.js: Added property allow-tabs.
+        * tests/mozilla/importList.html: Added property allow-tabs.
+        * tests/mozilla/js1_1/shell.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/Array/general1.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/Array/general2.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/Array/slice.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/Array/splice1.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/Array/splice2.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/Objects/toString-001.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/String/charCodeAt.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/String/concat.js: Modified property allow-tabs.
+        * tests/mozilla/js1_2/String/match.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/String/slice.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/function/Function_object.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/function/Number.js: Modified property allow-tabs.
+        * tests/mozilla/js1_2/function/String.js: Modified property allow-tabs.
+        * tests/mozilla/js1_2/function/nesting.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/function/regexparg-1.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/function/regexparg-2-n.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/jsref.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/operator/equality.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/operator/strictEquality.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_dollar_number.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_input.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_input_as_array.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_lastIndex.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_lastMatch.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_lastMatch_as_array.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_lastParen.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_lastParen_as_array.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_leftContext.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_leftContext_as_array.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_multiline.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_multiline_as_array.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_object.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_rightContext.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/RegExp_rightContext_as_array.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/alphanumeric.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/asterisk.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/backslash.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/backspace.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/beginLine.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/character_class.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/compile.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/control_characters.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/digit.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/dot.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/endLine.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/everything.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/exec.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/flags.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/global.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/hexadecimal.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/ignoreCase.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/interval.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/octal.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/parentheses.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/plus.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/question_mark.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/simple_form.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/source.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/special_characters.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/string_replace.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/string_search.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/string_split.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/test.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/toString.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/vertical_bar.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/whitespace.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/regexp/word_boundary.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/shell.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/statements/break.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/statements/continue.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/statements/do_while.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/statements/switch.js: Added property allow-tabs.
+        * tests/mozilla/js1_2/statements/switch2.js: Added property allow-tabs.
+        * tests/mozilla/js1_3/shell.js: Added property allow-tabs.
+        * tests/mozilla/js1_4/shell.js: Added property allow-tabs.
+        * tests/mozilla/js1_5/Regress/regress-111557.js: Added property allow-tabs.
+        * tests/mozilla/js1_5/Regress/regress-216320.js: Added property allow-tabs.
+        * tests/mozilla/menuhead.html: Added property allow-tabs.
+        * tests/mozilla/mklistpage.pl: Added property allow-tabs.
+        * tests/mozilla/runtests.pl: Added property allow-tabs.
+
+2010-01-08  Daniel Bates  <dbates@webkit.org>
+
+        Reviewed by Adam Barth.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33417
+
+        Cleans up style errors exposed by the patch for bug #33198.
+        Moreover, fixes all "Weird number of spaces at line-start. Are you using a 4-space indent?"
+        errors reported by check-webkit-style.
+
+        No functionality was changed. So, no new tests.
+
+        * wtf/Platform.h:
+
+2010-01-08  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Eric Seidel.
+
+        Don't store RegExp flags string representation
+        https://bugs.webkit.org/show_bug.cgi?id=33321
+
+        It's unused; the string representation is reconstructed from flags.
+
+        * runtime/RegExp.cpp:
+        (JSC::RegExp::RegExp):
+        * runtime/RegExp.h:
+
+2010-01-08  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Memory use grows grows possibly unbounded in this JavaScript Array test case
+        https://bugs.webkit.org/show_bug.cgi?id=31675
+
+        This fixes one observed bug in this test case, which is that
+        arrays don't report extra cost for the sparse value maps.
+
+        SunSpider reports a small speedup.
+
+        * runtime/JSArray.cpp:
+        (JSC::JSArray::putSlowCase): Report extra memory cost for
+        the sparse value map.
+        * runtime/JSArray.h: 
+
+2010-01-08  Yong Li  <yoli@rim.com>
+
+        Reviewed by Darin Adler.
+
+        Remove unnecessary #include from FastMalloc.cpp
+        https://bugs.webkit.org/show_bug.cgi?id=33393
+
+        * wtf/FastMalloc.cpp:
+
+2010-01-08  Eric Seidel  <eric@webkit.org>
+
+        No review, rolling out r52983.
+        http://trac.webkit.org/changeset/52983
+        https://bugs.webkit.org/show_bug.cgi?id=33321
+
+        Broke 59 JavaScriptCore tests.  I don't think Kent knew about
+        run-javascriptcore-tests.  Sadly neither does the commit-bot,
+        yet.
+
+        * runtime/RegExp.cpp:
+        (JSC::RegExp::RegExp):
+        * runtime/RegExp.h:
+        (JSC::RegExp::flags):
+
+2010-01-08  Eric Seidel  <eric@webkit.org>
+
+        No review, rolling out r52981.
+        http://trac.webkit.org/changeset/52981
+        https://bugs.webkit.org/show_bug.cgi?id=33319
+
+        Caused two JS tests to start failing:
+        ecma_2/RegExp/properties-001.js and js1_2/regexp/toString.js
+
+        * runtime/RegExpPrototype.cpp:
+        (JSC::regExpProtoFuncToString):
+
+2010-01-08  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        Don't store RegExp flags string representation
+        https://bugs.webkit.org/show_bug.cgi?id=33321
+
+        It's unused; the string representation is reconstructed from flags.
+
+        * runtime/RegExp.cpp:
+        (JSC::RegExp::RegExp):
+        * runtime/RegExp.h:
+
+2010-01-08  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        RegExp.prototype.toString returns "//" for empty regular expressions
+        https://bugs.webkit.org/show_bug.cgi?id=33319
+
+        "//" starts a single-line comment, hence "/(?:)/" should be used, according to ECMA.
+
+        * runtime/RegExpPrototype.cpp:
+        (JSC::regExpProtoFuncToString):
+
+2010-01-08  Norbert Leser  <norbert.leser@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        RVCT compiler with "-Otime -O3" optimization tries to optimize out 
+        inline new'ed pointers that are passed as arguments.
+        Proposed patch assigns new'ed pointer explicitly outside function call.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33084
+
+        * API/JSClassRef.cpp:
+        (OpaqueJSClass::OpaqueJSClass):
+        (OpaqueJSClassContextData::OpaqueJSClassContextData):
+
+2010-01-08  Gabor Loki  <loki@webkit.org>
+
+        Reviewed by Gavin Barraclough.
+
+        Remove an unnecessary cacheFlush from ARM_TRADITIONAL JIT
+        https://bugs.webkit.org/show_bug.cgi?id=33203
+
+        * assembler/ARMAssembler.cpp: Remove obsolete linkBranch function.
+        (JSC::ARMAssembler::executableCopy): Inline a clean linkBranch code.
+        * assembler/ARMAssembler.h:
+        (JSC::ARMAssembler::getLdrImmAddress): Use inline function.
+        (JSC::ARMAssembler::getLdrImmAddressOnPool): Ditto.
+        (JSC::ARMAssembler::patchPointerInternal): Remove an unnecessary cacheFlush.
+        (JSC::ARMAssembler::linkJump): Use patchPointerInternal instead of linkBranch.
+        (JSC::ARMAssembler::linkCall): Ditto.
+        (JSC::ARMAssembler::relinkCall): Ditto.
+
+2010-01-07  Gabor Loki  <loki@webkit.org>
+
+        Reviewed by Gavin Barraclough.
+
+        Build fix for JSVALUE32 when ENABLE_JIT_OPTIMIZE* are disabled
+        https://bugs.webkit.org/show_bug.cgi?id=33311
+
+        Move compileGetDirectOffset function to common part of JSVALUE32
+
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::compileGetDirectOffset):
+
+2010-01-07  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        Allow call sites to determine if ASSERT_* and LOG_* macros are operational
+        https://bugs.webkit.org/show_bug.cgi?id=33020
+
+        * wtf/Assertions.h: Set ASSERT_MSG_DISABLED, FATAL_DISABLED,
+        ERROR_DISABLED, LOG_DISABLED to 1 if the compiler does not support
+        variadic macros. Refactor for better readibility.
+
+2010-01-07  Daniel Bates  <dbates@rim.com>
+
+        Reviewed by Eric Seidel.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32987
+
+        Added ENABLE_XHTMLMP flag. Disabled by default.
+
+        * Configurations/FeatureDefines.xcconfig:
+
+2010-01-07  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Gavin Barraclough.
+
+        [Symbian] Port ARM traditional JIT Trampolines to RVCT
+        https://bugs.webkit.org/show_bug.cgi?id=30552
+
+        Take the GCC implementation and mechanically convert
+        it to RVCT syntax.
+
+        Use 'bx rX' instead of 'mov pc, rX' when it is available.
+
+        Developed in cooperation with Iain Campbell and Gabor Loki.
+
+        * JavaScriptCore.pri: Extra step to generate RVCT stubs. The 
+        script generation intentionally executed all the time not just
+        for RVCT targets.
+
+        * create_rvct_stubs: Added. Perl script to expand precompiler macros
+        for RVCT assembler - the template is defined in JITStubs.cpp.
+
+        * jit/JITStubs.cpp:
+        (JSC::ctiTrampoline):
+        (JSC::ctiVMThrowTrampoline):
+        (JSC::ctiOpThrowNotCaught):
+
+2010-01-07  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Fix a crash seen on the buildbots.
+
+        * runtime/JSGlobalObject.cpp:
+        (JSC::JSGlobalObject::init): Disable specific function tracking here,
+        instead of in WebCore, to ensure that the disabling happens before a
+        specific function can be registered.
+
+2010-01-07  Alexey Proskuryakov  <ap@apple.com>
+
+        Mac build fix.
+
+        * JavaScriptCore.exp: Export new JSGlobalData static data members.
+
+2010-01-07  Alexey Proskuryakov  <ap@apple.com>
+
+        Reviewed by Geoffrey Garen.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33057
+        REGRESSION(r49365): typeof(xhr.responseText) != "string" in Windows
+
+        <rdar://problem/7296920> REGRESSION: WebKit fails to start PeaceKeeper benchmark
+
+        Test: fast/js/webcore-string-comparison.html
+
+        In r49365, some code was moved from JSString.cpp to JSString.h, and as a result, WebCore
+        got a way to directly instantiate JSStrings over DLL borders. Since vftable for JSString was
+        not exported, objects created from WebCore got a different vptr, and JavaScriptCore
+        optimizations that relied on vptr of all JSString objects being equal failed.
+
+        * config.h: Added a JS_EXPORTCLASS macro for exporting classes. It's currently the same as
+        JS_EXPORTDATA, but it clearly needed a new name.
+
+        * runtime/InitializeThreading.cpp:
+        (JSC::initializeThreadingOnce):
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::storeVPtrs):
+        (JSC::JSGlobalData::JSGlobalData):
+        (JSC::JSGlobalData::createNonDefault):
+        (JSC::JSGlobalData::create):
+        (JSC::JSGlobalData::sharedInstance):
+        * runtime/JSGlobalData.h:
+        Store vptrs just once, no need to repeatedly pick and copy them. This makes it possible to
+        assert vptr correctness in object destructors (which don't have access to JSGlobalData,
+        and even Heap::heap(this) will fail for fake objects created from storeVPtrs()).
+
+        * runtime/JSArray.cpp: (JSC::JSArray::~JSArray): Assert that vptr is what we expect it to be.
+        It's important to assert in destructor, because MSVC changes the vptr after constructor
+        is invoked.
+        * runtime/JSByteArray.cpp: (JSC::JSByteArray::~JSByteArray): Ditto.
+        * runtime/JSByteArray.h: Ditto.
+        * runtime/JSFunction.h: Ditto.
+        * runtime/JSFunction.cpp: (JSC::JSFunction::~JSFunction): Ditto.
+
+        * runtime/JSCell.h: (JSC::JSCell::setVPtr): Added a method to substitute vptr for another
+        one.
+
+        * runtime/JSString.h: Export JSString class together with its vftable, and tell other
+        libraries tp import it. This is needed on platforms that have a separate JavaScriptCore
+        dynamic library - and on Mac, we already did the export via JavaScriptCore.exp.
+        (JSC::JSString::~JSString): Assert tha vptr is what we expect it to be.
+        (JSC::fixupVPtr): Store a previously saved primary vftable pointer (do nothing if building
+        JavaScriptCore itself).
+        (JSC::jsSingleCharacterString): Call fixupVPtr in case this is call across DLL boundary.
+        (JSC::jsSingleCharacterSubstring): Ditto.
+        (JSC::jsNontrivialString): Ditto.
+        (JSC::jsString): Ditto.
+        (JSC::jsSubstring): Ditto.
+        (JSC::jsOwnedString): Ditto.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def: Export the new static
+        JSGlobalData members that are used in WebCore via inline functions.
+
+2010-01-07  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Safari memory usage skyrockets using new Google AdWords interface
+        https://bugs.webkit.org/show_bug.cgi?id=33343
+
+        The memory use was caused by the global object creating too many structures
+        as it thrashed between different specific functions.
+
+        * runtime/Structure.cpp:
+        (JSC::Structure::Structure):
+        (JSC::Structure::addPropertyTransition):
+        (JSC::Structure::changePrototypeTransition):
+        (JSC::Structure::despecifyFunctionTransition):
+        (JSC::Structure::addAnonymousSlotsTransition):
+        (JSC::Structure::getterSetterTransition):
+        (JSC::Structure::toDictionaryTransition):
+        (JSC::Structure::addPropertyWithoutTransition):
+        (JSC::Structure::despecifyAllFunctions):
+        * runtime/Structure.h:
+        (JSC::Structure::disableSpecificFunctionTracking): Track a thrash count
+        for specific functions. Disable specific function tracking once the
+        thrash count has been hit.
+
+2010-01-07  Csaba Osztrogonác  <ossy@webkit.org>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Enable JIT in debug mode on win32 after r51141 fixed the crashes.
+
+        * JavaScriptCore.pri:
+
+2010-01-07  Zoltan Horvath  <zoltan@webkit.org>
+
+        Reviewed by Holger Freyther.
+
+        [Mac] Build fix when FAST_MALLOC_MATCH_VALIDATION=1
+        https://bugs.webkit.org/show_bug.cgi?id=33312
+
+        Using of operator += cause compile error on Mac, so it is changed to
+        "= static_cast<AllocAlignmentInteger*>(old_ptr) + 1".
+
+        * wtf/FastMalloc.cpp:
+        (WTF::TCMallocStats::realloc):
+
+2010-01-07  Zoltan Horvath  <zoltan@webkit.org>
+
+        Reviewed by Holger Freyther.
+
+        [Qt] Build fix when FAST_MALLOC_MATCH_VALIDATION=1
+        https://bugs.webkit.org/show_bug.cgi?id=33312
+
+        Remove pByte (committed in r42344 from #20422), because pByte doesn't
+        exist and it is unnecessary.
+
+        * wtf/FastMalloc.cpp:
+        (WTF::TCMallocStats::realloc):
+
+2010-01-06  Gavin Barraclough  <barraclough@apple.com>
+
+        QT build fix.
+
+        * runtime/Identifier.cpp:
+        (JSC::createIdentifierTableSpecific):
+
+2010-01-06  Gavin Barraclough  <barraclough@apple.com>
+
+        Windows build fix part I.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2010-01-06  Dan Bernstein  <mitz@apple.com>
+
+        Build fix
+
+        * runtime/Identifier.cpp:
+        (JSC::createIdentifierTableSpecificCallback):
+
+2010-01-05  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33236
+        Remove m_identifierTable pointer from UString
+
+        Currently every string holds a pointer so that during destruction,
+        if a string has been used as an identifier, it can remove itself
+        from the table.  By instead accessing the identifierTable via a
+        thread specific tracking the table associated with the current
+        globaldata, we can save the memory cost of this pointer.
+
+        * API/APIShims.h:
+        (JSC::APIEntryShimWithoutLock::APIEntryShimWithoutLock):
+        (JSC::APIEntryShimWithoutLock::~APIEntryShimWithoutLock):
+        (JSC::APICallbackShim::APICallbackShim):
+        (JSC::APICallbackShim::~APICallbackShim):
+
+            - change the API shims to track the identifierTable of the current JSGlobalData.
+
+        * API/JSContextRef.cpp:
+        (JSContextGroupCreate):
+
+            - update creation of JSGlobalData for API usage to use new create method.
+            - fix shim instanciation bug in JSGlobalContextCreateInGroup.
+
+        * JavaScriptCore.exp:
+        * runtime/Completion.cpp:
+        (JSC::checkSyntax):
+        (JSC::evaluate):
+
+            - add asserts to check the identifierTable is being tracked correctly.
+
+        * runtime/Identifier.cpp:
+        (JSC::IdentifierTable::~IdentifierTable):
+        (JSC::IdentifierTable::add):
+        (JSC::Identifier::remove):
+        (JSC::Identifier::checkSameIdentifierTable):
+        (JSC::createIdentifierTableSpecificCallback):
+        (JSC::createIdentifierTableSpecific):
+        (JSC::createDefaultDataSpecific):
+
+            - Use currentIdentifierTable() instead of UStringImpl::m_identifierTable.
+            - Define methods to access the thread specific identifier tables.
+
+        * runtime/Identifier.h:
+        (JSC::ThreadIdentifierTableData::ThreadIdentifierTableData):
+        (JSC::defaultIdentifierTable):
+        (JSC::setDefaultIdentifierTable):
+        (JSC::currentIdentifierTable):
+        (JSC::setCurrentIdentifierTable):
+        (JSC::resetCurrentIdentifierTable):
+
+            - Declare methods to access the thread specific identifier tables.
+
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::createNonDefault):
+        (JSC::JSGlobalData::create):
+        (JSC::JSGlobalData::sharedInstance):
+
+            - creation of JSGlobalData objects, other than for API usage, associate themselves with the current thread.
+
+        * runtime/JSGlobalData.h:
+        * runtime/UStringImpl.cpp:
+        (JSC::UStringImpl::destroy):
+
+            - destroy() method should be using isIdentifier().
+
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::isIdentifier):
+        (JSC::UStringImpl::setIsIdentifier):
+        (JSC::UStringImpl::checkConsistency):
+        (JSC::UStringImpl::UStringImpl):
+
+            - replace m_identifierTable with a single m_isIdentifier bit.
+
+        * wtf/StringHashFunctions.h:
+        (WTF::stringHash):
+
+            - change string hash result from 32-bit to 31-bit, to free a bit in UStringImpl for m_isIdentifier.
+
+2009-12-25 Patrick Gansterer <paroga@paroga.com>
+ 
+        Reviewed by Eric Seidel.
+
+        Buildfix for WinCE + style fixes.
+        https://bugs.webkit.org/show_bug.cgi?id=32939
+
+        * jsc.cpp:
+        (functionPrint):
+        (functionQuit):
+        (parseArguments):
+        (fillBufferWithContentsOfFile):
+ 
+2010-01-05  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Eric Seidel.
+
+        WinCE buildfix after r52791 (renamed PLATFORM(WINCE) to OS(WINCE)).
+        https://bugs.webkit.org/show_bug.cgi?id=33205
+
+        * jit/ExecutableAllocator.h:
+
+2010-01-05  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Darin Adler.
+
+        Added compiler error for unsupported platforms.
+        https://bugs.webkit.org/show_bug.cgi?id=33112
+
+        * jit/JITStubs.cpp:
+
+2010-01-05  Gabor Loki  <loki@webkit.org>
+
+        Reviewed by Maciej Stachowiak.
+
+        Follow r52729 in ARMAssembler.
+        https://bugs.webkit.org/show_bug.cgi?id=33208
+
+        Use WTF_ARM_ARCH_AT_LEAST instead of ARM_ARCH_VERSION
+
+        * assembler/ARMAssembler.cpp:
+        (JSC::ARMAssembler::encodeComplexImm): Move tmp declaration to ARMv7
+        * assembler/ARMAssembler.h:
+        (JSC::ARMAssembler::):
+        (JSC::ARMAssembler::bkpt):
+
+2010-01-05  Maciej Stachowiak  <mjs@apple.com>
+
+        Unreviewed build fix for Gtk+
+
+        Don't use // comments in Platform.h, at least some of them seem to make the version of GCC
+        used on the Gtk buildbot unhappy.
+
+        * wtf/Platform.h:
+
+2010-01-04  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Darin Fisher.
+
+        Reorganize, document and rename OS() platform macros.
+        https://bugs.webkit.org/show_bug.cgi?id=33198
+
+        * wtf/Platform.h: Rename, reorganize and document OS() macros.
+
+        Adapt to name changes. Also fixed a few incorrect OS checks.
+
+        * API/JSContextRef.cpp:
+        * assembler/MacroAssemblerARM.cpp:
+        (JSC::isVFPPresent):
+        * assembler/MacroAssemblerX86Common.h:
+        * bytecode/SamplingTool.cpp:
+        * config.h:
+        * interpreter/RegisterFile.cpp:
+        (JSC::RegisterFile::~RegisterFile):
+        * interpreter/RegisterFile.h:
+        (JSC::RegisterFile::RegisterFile):
+        (JSC::RegisterFile::grow):
+        * jit/ExecutableAllocator.h:
+        * jit/ExecutableAllocatorFixedVMPool.cpp:
+        * jit/ExecutableAllocatorPosix.cpp:
+        * jit/ExecutableAllocatorSymbian.cpp:
+        * jit/ExecutableAllocatorWin.cpp:
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::privateCompileCTIMachineTrampolines):
+        * jit/JITStubs.cpp:
+        * jsc.cpp:
+        (main):
+        * parser/Grammar.y:
+        * profiler/ProfileNode.cpp:
+        (JSC::getCount):
+        * runtime/Collector.cpp:
+        (JSC::Heap::Heap):
+        (JSC::Heap::allocateBlock):
+        (JSC::Heap::freeBlockPtr):
+        (JSC::currentThreadStackBase):
+        (JSC::getCurrentPlatformThread):
+        (JSC::suspendThread):
+        (JSC::resumeThread):
+        (JSC::getPlatformThreadRegisters):
+        (JSC::otherThreadStackPointer):
+        * runtime/Collector.h:
+        * runtime/DateConstructor.cpp:
+        * runtime/DatePrototype.cpp:
+        (JSC::formatLocaleDate):
+        * runtime/InitializeThreading.cpp:
+        (JSC::initializeThreading):
+        * runtime/MarkStack.h:
+        (JSC::MarkStack::MarkStackArray::shrinkAllocation):
+        * runtime/MarkStackPosix.cpp:
+        * runtime/MarkStackSymbian.cpp:
+        * runtime/MarkStackWin.cpp:
+        * runtime/StringPrototype.cpp:
+        (JSC::stringProtoFuncLastIndexOf):
+        * runtime/TimeoutChecker.cpp:
+        (JSC::getCPUTime):
+        * runtime/UString.cpp:
+        (JSC::UString::from):
+        * wtf/Assertions.cpp:
+        * wtf/Assertions.h:
+        * wtf/CurrentTime.cpp:
+        (WTF::lowResUTCTime):
+        * wtf/CurrentTime.h:
+        (WTF::getLocalTime):
+        * wtf/DateMath.cpp:
+        * wtf/FastMalloc.cpp:
+        (WTF::TCMalloc_ThreadCache::InitModule):
+        (WTF::TCMallocStats::):
+        * wtf/FastMalloc.h:
+        * wtf/MathExtras.h:
+        * wtf/RandomNumber.cpp:
+        (WTF::randomNumber):
+        * wtf/RandomNumberSeed.h:
+        (WTF::initializeRandomNumberGenerator):
+        * wtf/StringExtras.h:
+        * wtf/TCSpinLock.h:
+        (TCMalloc_SpinLock::Unlock):
+        (TCMalloc_SlowLock):
+        * wtf/TCSystemAlloc.cpp:
+        * wtf/ThreadSpecific.h:
+        (WTF::::destroy):
+        * wtf/Threading.h:
+        * wtf/ThreadingPthreads.cpp:
+        (WTF::initializeThreading):
+        (WTF::isMainThread):
+        * wtf/ThreadingWin.cpp:
+        (WTF::wtfThreadEntryPoint):
+        (WTF::createThreadInternal):
+        * wtf/VMTags.h:
+        * wtf/unicode/icu/CollatorICU.cpp:
+        (WTF::Collator::userDefault):
+        * wtf/win/MainThreadWin.cpp:
+        (WTF::initializeMainThreadPlatform):
+
+2010-01-04  Gustavo Noronha Silva  <gns@gnome.org>
+
+        Add missing files to the build system - make distcheck build fix.
+
+        * GNUmakefile.am:
+
+2010-01-04  Gavin Barraclough <barraclough@apple.com>
+
+        Reviewed by Sam Weinig, additional coding by Mark Rowe.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33163
+        Add string hashing functions to WTF.
+        Use WTF's string hashing functions from UStringImpl.
+
+        * GNUmakefile.am:
+        * JavaScriptCore.exp:
+        * JavaScriptCore.gypi:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * runtime/UStringImpl.cpp:
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::computeHash):
+        * wtf/HashFunctions.h:
+        * wtf/StringHashFunctions.h: Added.
+        (WTF::stringHash):
+
+2010-01-04  Dmitry Titov  <dimich@chromium.org>
+
+        Not reviewed, attempt to fix ARM bulid.
+
+        * wtf/Platform.h:
+
+2010-01-04  Gavin Barraclough  <barraclough@apple.com>
+
+        Rubber stamped by Geoff Garen.
+
+        Add an 'isIdentifier' to UStringImpl, use this where appropriate
+        (where previously 'identifierTable' was being tested).
+
+        * API/JSClassRef.cpp:
+        (OpaqueJSClass::~OpaqueJSClass):
+        (OpaqueJSClassContextData::OpaqueJSClassContextData):
+        * runtime/Identifier.cpp:
+        (JSC::Identifier::addSlowCase):
+        * runtime/Identifier.h:
+        (JSC::Identifier::add):
+        * runtime/PropertyNameArray.cpp:
+        (JSC::PropertyNameArray::add):
+        * runtime/UStringImpl.h:
+        (JSC::UStringImpl::isIdentifier):
+
+2010-01-04  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Sam "Shimmey Shimmey" Weinig.
+
+        https://bugs.webkit.org/show_bug.cgi?id=33158
+        Refactor JSC API entry/exit to use RAII instead of copy/pasting code.
+        Make it easier to change set of actions taken when passing across the API boundary.
+
+        * API/APIShims.h: Added.
+        (JSC::APIEntryShimWithoutLock::APIEntryShimWithoutLock):
+        (JSC::APIEntryShimWithoutLock::~APIEntryShimWithoutLock):
+        (JSC::APIEntryShim::APIEntryShim):
+        (JSC::APICallbackShim::APICallbackShim):
+        (JSC::APICallbackShim::~APICallbackShim):
+        * API/JSBase.cpp:
+        (JSEvaluateScript):
+        (JSCheckScriptSyntax):
+        (JSGarbageCollect):
+        (JSReportExtraMemoryCost):
+        * API/JSCallbackConstructor.cpp:
+        (JSC::constructJSCallback):
+        * API/JSCallbackFunction.cpp:
+        (JSC::JSCallbackFunction::call):
+        * API/JSCallbackObjectFunctions.h:
+        (JSC::::init):
+        (JSC::::getOwnPropertySlot):
+        (JSC::::put):
+        (JSC::::deleteProperty):
+        (JSC::::construct):
+        (JSC::::hasInstance):
+        (JSC::::call):
+        (JSC::::getOwnPropertyNames):
+        (JSC::::toNumber):
+        (JSC::::toString):
+        (JSC::::staticValueGetter):
+        (JSC::::callbackGetter):
+        * API/JSContextRef.cpp:
+        * API/JSObjectRef.cpp:
+        (JSObjectMake):
+        (JSObjectMakeFunctionWithCallback):
+        (JSObjectMakeConstructor):
+        (JSObjectMakeFunction):
+        (JSObjectMakeArray):
+        (JSObjectMakeDate):
+        (JSObjectMakeError):
+        (JSObjectMakeRegExp):
+        (JSObjectGetPrototype):
+        (JSObjectSetPrototype):
+        (JSObjectHasProperty):
+        (JSObjectGetProperty):
+        (JSObjectSetProperty):
+        (JSObjectGetPropertyAtIndex):
+        (JSObjectSetPropertyAtIndex):
+        (JSObjectDeleteProperty):
+        (JSObjectCallAsFunction):
+        (JSObjectCallAsConstructor):
+        (JSObjectCopyPropertyNames):
+        (JSPropertyNameArrayRelease):
+        (JSPropertyNameAccumulatorAddName):
+        * API/JSValueRef.cpp:
+        (JSValueGetType):
+        (JSValueIsUndefined):
+        (JSValueIsNull):
+        (JSValueIsBoolean):
+        (JSValueIsNumber):
+        (JSValueIsString):
+        (JSValueIsObject):
+        (JSValueIsObjectOfClass):
+        (JSValueIsEqual):
+        (JSValueIsStrictEqual):
+        (JSValueIsInstanceOfConstructor):
+        (JSValueMakeUndefined):
+        (JSValueMakeNull):
+        (JSValueMakeBoolean):
+        (JSValueMakeNumber):
+        (JSValueMakeString):
+        (JSValueToBoolean):
+        (JSValueToNumber):
+        (JSValueToStringCopy):
+        (JSValueToObject):
+        (JSValueProtect):
+        (JSValueUnprotect):
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+
+2010-01-04  Dan Bernstein  <mitz@apple.com>
+
+        Reviewed by Ada Chan and Mark Rowe.
+
+        Updated copyright string
+
+        * Info.plist:
+        * JavaScriptCore.vcproj/JavaScriptCore.resources/Info.plist:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.rc:
+
+2010-01-04  Adam Roben  <aroben@apple.com>
+
+        No review, rolling out r52741.
+        http://trac.webkit.org/changeset/52741
+        https://bugs.webkit.org/show_bug.cgi?id=33056
+
+        * wtf/AlwaysInline.h:
+
+2010-01-04  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Darin Adler.
+
+        Add cacheFlush support for WinCE
+        https://bugs.webkit.org/show_bug.cgi?id=33110
+
+        * jit/ExecutableAllocator.h:
+        (JSC::ExecutableAllocator::cacheFlush):
+
+2010-01-04  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Adam Roben.
+
+        Implement NO_RETURN for COMPILER(MSVC).
+        https://bugs.webkit.org/show_bug.cgi?id=33056
+
+        * wtf/AlwaysInline.h:
+
+2010-01-04  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Simon Hausmann.
+
+        Fix some PLATFORM(*_ENDIAN) uses to CPU()
+        https://bugs.webkit.org/show_bug.cgi?id=33148
+
+        * runtime/JSCell.cpp:
+        (JSC::):
+        * runtime/JSValue.h:
+        (JSC::JSValue::):
+
+2010-01-04  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Adam Barth.
+
+        Document CPU() macros in comments.
+        https://bugs.webkit.org/show_bug.cgi?id=33147
+
+        * wtf/Platform.h:
+
+2010-01-04  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Adam Barth.
+
+        Reorganize, document and rename CPU() platform macros.
+        https://bugs.webkit.org/show_bug.cgi?id=33145
+        ExecutableAllocatorSymbian appears to have buggy ARM version check
+        https://bugs.webkit.org/show_bug.cgi?id=33138
+        
+        * wtf/Platform.h:
+        Rename all macros related to detection of particular CPUs or
+        classes of CPUs to CPU(), reorganize and document them.
+
+        All remaining changes are adapting to the renames, plus fixing the
+        second bug cited above.
+        
+        * assembler/ARMAssembler.cpp:
+        * assembler/ARMAssembler.h:
+        * assembler/ARMv7Assembler.h:
+        * assembler/AbstractMacroAssembler.h:
+        (JSC::AbstractMacroAssembler::Imm32::Imm32):
+        * assembler/MacroAssembler.h:
+        * assembler/MacroAssemblerARM.cpp:
+        * assembler/MacroAssemblerARM.h:
+        * assembler/MacroAssemblerCodeRef.h:
+        (JSC::MacroAssemblerCodePtr::MacroAssemblerCodePtr):
+        * assembler/MacroAssemblerX86.h:
+        * assembler/MacroAssemblerX86Common.h:
+        * assembler/MacroAssemblerX86_64.h:
+        * assembler/X86Assembler.h:
+        (JSC::X86Registers::):
+        (JSC::X86Assembler::):
+        (JSC::X86Assembler::movl_mEAX):
+        (JSC::X86Assembler::movl_EAXm):
+        (JSC::X86Assembler::repatchLoadPtrToLEA):
+        (JSC::X86Assembler::X86InstructionFormatter::memoryModRM):
+        * jit/ExecutableAllocator.h:
+        * jit/ExecutableAllocatorFixedVMPool.cpp:
+        * jit/ExecutableAllocatorPosix.cpp:
+        * jit/ExecutableAllocatorSymbian.cpp:
+        (JSC::ExecutableAllocator::intializePageSize):
+        * jit/JIT.cpp:
+        * jit/JIT.h:
+        * jit/JITArithmetic.cpp:
+        * jit/JITInlineMethods.h:
+        (JSC::JIT::beginUninterruptedSequence):
+        (JSC::JIT::restoreArgumentReferenceForTrampoline):
+        (JSC::JIT::emitCount):
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::privateCompileCTIMachineTrampolines):
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::privateCompileGetByIdProto):
+        (JSC::JIT::privateCompileGetByIdProtoList):
+        (JSC::JIT::privateCompileGetByIdChainList):
+        (JSC::JIT::privateCompileGetByIdChain):
+        * jit/JITStubs.cpp:
+        (JSC::JITThunks::JITThunks):
+        * jit/JITStubs.h:
+        * runtime/Collector.cpp:
+        (JSC::currentThreadStackBase):
+        (JSC::getPlatformThreadRegisters):
+        (JSC::otherThreadStackPointer):
+        * wrec/WREC.h:
+        * wrec/WRECGenerator.cpp:
+        (JSC::WREC::Generator::generateEnter):
+        (JSC::WREC::Generator::generateReturnSuccess):
+        (JSC::WREC::Generator::generateReturnFailure):
+        * wrec/WRECGenerator.h:
+        * wtf/FastMalloc.cpp:
+        * wtf/TCSpinLock.h:
+        (TCMalloc_SpinLock::Lock):
+        (TCMalloc_SpinLock::Unlock):
+        (TCMalloc_SlowLock):
+        * wtf/Threading.h:
+        * wtf/dtoa.cpp:
+        * yarr/RegexJIT.cpp:
+        (JSC::Yarr::RegexGenerator::generateEnter):
+        (JSC::Yarr::RegexGenerator::generateReturn):
+        * yarr/RegexJIT.h:
+
+2010-01-04  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Adam Barth.
+
+        Clean up COMPILER macros and remove unused ones.
+        https://bugs.webkit.org/show_bug.cgi?id=33132
+        
+        Removed values are COMPILER(BORLAND) and COMPILER(CYGWIN) - they were
+        not used anywhere.
+
+        * wtf/Platform.h:
+
+2010-01-03  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Eric Seidel.
+
+        Update wtf/Platform.h to document the new system for porting macros.
+        https://bugs.webkit.org/show_bug.cgi?id=33130
+
+        * wtf/Platform.h:
+
+2009-12-29  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        PLATFORM(CAIRO) should be defined by WIN_CAIRO define
+        https://bugs.webkit.org/show_bug.cgi?id=22250
+
+        * wtf/Platform.h: Define WTF_PLATFORM_CAIRO for GTK port only
+        For the WinCairo port WTF_PLATFORM_CAIRO is already defined in config.h
+
+2009-12-28  Shu Chang  <Chang.Shu@nokia.com>
+
+        Reviewed by Laszlo Gombos.
+
+        [Qt] Delete ThreadPrivate instance after it is finished.
+        https://bugs.webkit.org/show_bug.cgi?id=32614
+
+        * wtf/qt/ThreadingQt.cpp:
+        (WTF::ThreadMonitor::instance):
+        (WTF::ThreadMonitor::threadFinished):
+        (WTF::createThreadInternal):
+        (WTF::detachThread):
+
+2009-12-28  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        Cleanup of #define JS_EXPORT.
+
+        * API/JSBase.h:
+
+2009-12-27  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Adam Barth.
+
+        WinCE buildfix (HWND_MESSAGE isn't supported there)
+
+        * wtf/win/MainThreadWin.cpp:
+        (WTF::initializeMainThreadPlatform):
+
+2009-12-27  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Adam Barth.
+
+        Added a file with WinMain function to link agains in WinCE.
+
+        * os-win32/WinMain.cpp: Added.
+        (convertToUtf8):
+        (WinMain):
+
+2009-12-24  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Unreviewed; revert of r52550.
+
+        The change regressed the following LayoutTests for QtWebKit.
+
+        fast/workers/worker-call.html -> crashed
+        fast/workers/worker-close.html -> crashed
+
+        * wtf/qt/ThreadingQt.cpp:
+        (WTF::waitForThreadCompletion):
+        (WTF::detachThread):
+
+2009-12-24  Shu Chang  <Chang.Shu@nokia.com>
+
+        Reviewed by Laszlo Gombos.
+
+        [Qt] Fix memory leak by deleting instance of ThreadPrivate
+        in function waitForThreadCompletion(), synchronously, or in
+        detachThread(), asynchronously.
+        https://bugs.webkit.org/show_bug.cgi?id=32614 
+
+        * wtf/qt/ThreadingQt.cpp:
+        (WTF::waitForThreadCompletion):
+        (WTF::detachThread):
+
+2009-12-23  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Laszlo Gombos.
+
+        Include stddef.h for ptrdiff_t
+        https://bugs.webkit.org/show_bug.cgi?id=32891
+
+        ptrdiff_t is typedef-ed in stddef.h.
+        Include stddef.h in jit/ExecutableAllocator.h.
+
+        * jit/ExecutableAllocator.h:
+
+2009-12-23  Patrick Gansterer  <paroga@paroga.com>
+
+        Reviewed by Eric Seidel.
+
+        Buildfix after r47092.
+
+        * wtf/wince/MemoryManager.cpp:
+        (WTF::tryFastMalloc):
+        (WTF::tryFastZeroedMalloc):
+        (WTF::tryFastCalloc):
+        (WTF::tryFastRealloc):
+
+2009-12-23  Kent Tamura  <tkent@chromium.org>
+
+        Reviewed by Darin Adler.
+
+        HTMLInputElement::valueAsDate getter support.
+        https://bugs.webkit.org/show_bug.cgi?id=32876
+
+        Expose dateToDaysFrom1970().
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * wtf/DateMath.cpp:
+        (WTF::dateToDaysFrom1970):
+        * wtf/DateMath.h:
+
+2009-12-22  Darin Adler  <darin@apple.com>
+
+        Reviewed by Mark Rowe.
+
+        Turn off datagrid by default, at least for all platforms Apple ships.
+        The datagrid implementation isn't ready for general web use yet.
+
+        * Configurations/FeatureDefines.xcconfig: Turn off datagrid by default.
+
+2009-12-22  Steve Block  <steveblock@google.com>
+
+        Reviewed by David Levin.
+
+        Updates Android's scheduleDispatchFunctionsOnMainThread() to use new
+        AndroidThreading class, rather than using JavaSharedClient directly.
+        This fixes the current layering violation.
+        https://bugs.webkit.org/show_bug.cgi?id=32651
+
+        The pattern is copied from Chromium, which uses the ChromiumThreading
+        class. This patch also fixes the style in ChromiumThreading.h.
+
+        * wtf/android/AndroidThreading.h: Added. Declares AndroidThreading.
+        * wtf/android/MainThreadAndroid.cpp: Modified
+        (WTF::scheduleDispatchFunctionsOnMainThread): Uses AndroidThreading.
+        * wtf/chromium/ChromiumThreading.h: Modified. Fixes style.
+
+2009-12-22  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Fix a couple of problems with UntypedPtrAndBitfield.
+
+        Add a m_leaksPtr to reduce false positives from leaks in debug builds
+        (this isn't perfect because we'd like a solution for release builds,
+        but this is now at least as good as a PtrAndFlags would be).
+
+        Switch SmallStringsto use a regular string for the base, rather than
+        a static one.  UntypedPtrAndBitfield assumes all strings are at least
+        8 byte aligned; this migt not be true of static strings.  Shared buffers
+        are heap allocated, as are all UStringImpls other than static strings.
+        Static strings cannot end up being the owner string of substrings,
+        since the only static strings are length 0.
+
+        * runtime/SmallStrings.cpp:
+        (JSC::SmallStringsStorage::SmallStringsStorage):
+        * runtime/UStringImpl.h:
+        (JSC::UntypedPtrAndBitfield::UntypedPtrAndBitfield):
+        (JSC::UStringImpl::UStringImpl):
+
+2009-12-22  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Darin Adler.
+
+        RVCT (__ARMCC_VERSION < 400000) does not provide strcasecmp and strncasecmp
+        https://bugs.webkit.org/show_bug.cgi?id=32857
+
+        Add implementation of strcasecmp and strncasecmp for RVCT < 4.0
+        because earlier versions of RVCT 4.0 does not provide these functions.
+
+        * wtf/StringExtras.cpp: Added.
+        (strcasecmp):
+        (strncasecmp):
+        * wtf/StringExtras.h:
+
+2009-12-22  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Darin Adler.
+
+        Define ALWAYS_INLINE and WTF_PRIVATE_INLINE to __forceinline for RVCT
+        https://bugs.webkit.org/show_bug.cgi?id=32853
+
+        Use __forceinline forces RVCT to compile a C or C++ function
+        inline. The compiler attempts to inline the function, regardless of
+        the characteristics of the function.
+
+        * wtf/AlwaysInline.h:
+        * wtf/FastMalloc.h:
+
+2009-12-21  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Prospective GTK build fix: Add UStringImpl.cpp/h to the build.
+
+        * GNUmakefile.am:
+
+2009-12-21  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Fix the Qt build, add UStringImpl.cpp to the build.
+
+        * JavaScriptCore.pri:
+
+2009-12-21  Gavin Barraclough  <barraclough@apple.com>
+
+        Windows Build fix part 5.
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
+
+2009-12-21  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (build fix).
+        Fix breakage of world introduced in build fix to r52463.
+
+        * runtime/UStringImpl.h:
+
+2009-12-21  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32831
+        Replace UString::Rep implementation, following introduction of ropes to JSC.
+
+            * Remove redundant overcapacity mechanisms.
+            * Reduce memory cost of Rep's.
+            * Add an inline storage mechanism akin to that in WebCore's StringImpl.
+
+        ~1% Sunspider progression.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * runtime/JSString.cpp:
+        (JSC::JSString::resolveRope):
+        * runtime/SmallStrings.cpp:
+        (JSC::SmallStringsStorage::SmallStringsStorage):
+        * runtime/UString.cpp:
+        (JSC::initializeUString):
+        (JSC::createRep):
+        (JSC::UString::createFromUTF8):
+        (JSC::UString::createUninitialized):
+        (JSC::UString::spliceSubstringsWithSeparators):
+        (JSC::UString::replaceRange):
+        (JSC::UString::ascii):
+        (JSC::UString::operator=):
+        (JSC::UString::toStrictUInt32):
+        (JSC::equal):
+        * runtime/UString.h:
+        (JSC::UString::isEmpty):
+        (JSC::UString::cost):
+        (JSC::makeString):
+        * runtime/UStringImpl.cpp: Added.
+        (JSC::UStringImpl::baseSharedBuffer):
+        (JSC::UStringImpl::sharedBuffer):
+        (JSC::UStringImpl::destroy):
+        (JSC::UStringImpl::computeHash):
+        * runtime/UStringImpl.h: Added.
+        (JSC::UntypedPtrAndBitfield::UntypedPtrAndBitfield):
+        (JSC::UntypedPtrAndBitfield::asPtr):
+        (JSC::UntypedPtrAndBitfield::operator&=):
+        (JSC::UntypedPtrAndBitfield::operator|=):
+        (JSC::UntypedPtrAndBitfield::operator&):
+        (JSC::UStringImpl::create):
+        (JSC::UStringImpl::createCopying):
+        (JSC::UStringImpl::createUninitialized):
+        (JSC::UStringImpl::data):
+        (JSC::UStringImpl::size):
+        (JSC::UStringImpl::cost):
+        (JSC::UStringImpl::hash):
+        (JSC::UStringImpl::computedHash):
+        (JSC::UStringImpl::setHash):
+        (JSC::UStringImpl::identifierTable):
+        (JSC::UStringImpl::setIdentifierTable):
+        (JSC::UStringImpl::ref):
+        (JSC::UStringImpl::deref):
+        (JSC::UStringImpl::allocChars):
+        (JSC::UStringImpl::copyChars):
+        (JSC::UStringImpl::computeHash):
+        (JSC::UStringImpl::null):
+        (JSC::UStringImpl::empty):
+        (JSC::UStringImpl::checkConsistency):
+        (JSC::UStringImpl::):
+        (JSC::UStringImpl::UStringImpl):
+        (JSC::UStringImpl::operator new):
+        (JSC::UStringImpl::bufferOwnerString):
+        (JSC::UStringImpl::bufferOwnership):
+        (JSC::UStringImpl::isStatic):
+
+2009-12-18  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        Move some build decisions from Qt build system into source files
+        https://bugs.webkit.org/show_bug.cgi?id=31956
+
+        * JavaScriptCore.pri: Compile files unconditionally
+        * jit/ExecutableAllocatorPosix.cpp: Guard with PLATFORM(UNIX) && !PLATFORM(SYMBIAN)
+        * jit/ExecutableAllocatorWin.cpp: Guard with PLATFORM(WIN_OS)
+        * runtime/MarkStackPosix.cpp: Guard with PLATFORM(UNIX) && !PLATFORM(SYMBIAN)
+        * runtime/MarkStackSymbian.cpp: Guard with PLATFORM(SYMBIAN)
+        * runtime/MarkStackWin.cpp: Guard with PLATFORM(WIN_OS)
+        * wtf/Platform.h: Guard ENABLE_JSC_MULTIPLE_THREADS with ENABLE_SINGLE_THREADED for the Qt port
+        * wtf/ThreadingNone.cpp: Guard with ENABLE(SINGLE_THREADED)
+        * wtf/qt/ThreadingQt.cpp: Guard with !ENABLE(SINGLE_THREADED)
+
+2009-12-18  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Add createNonCopying method to UString to make replace constructor passed bool,
+        to make behaviour more explicit.  Add createFromUTF8 to UString (wrapping method
+        on UString::Rep), since other cases of transliteration (e.g.  from ascii) are
+        performed in UString constructors.  Add/use setHash & size() accessors on Rep,
+        rather than accessing _hash/len directly.
+
+        * API/JSClassRef.cpp:
+        (OpaqueJSClass::OpaqueJSClass):
+        * API/OpaqueJSString.cpp:
+        (OpaqueJSString::ustring):
+        * JavaScriptCore.exp:
+        * runtime/ArrayPrototype.cpp:
+        (JSC::arrayProtoFuncToString):
+        * runtime/Identifier.cpp:
+        (JSC::Identifier::equal):
+        (JSC::CStringTranslator::translate):
+        (JSC::UCharBufferTranslator::translate):
+        (JSC::Identifier::addSlowCase):
+        * runtime/JSString.cpp:
+        (JSC::JSString::resolveRope):
+        * runtime/JSString.h:
+        (JSC::JSString::Rope::Fiber::refAndGetLength):
+        (JSC::JSString::Rope::append):
+        * runtime/StringBuilder.h:
+        (JSC::StringBuilder::release):
+        * runtime/StringConstructor.cpp:
+        (JSC::stringFromCharCodeSlowCase):
+        * runtime/StringPrototype.cpp:
+        (JSC::substituteBackreferencesSlow):
+        (JSC::stringProtoFuncToLowerCase):
+        (JSC::stringProtoFuncToUpperCase):
+        (JSC::stringProtoFuncFontsize):
+        (JSC::stringProtoFuncLink):
+        * runtime/UString.cpp:
+        (JSC::UString::UString):
+        (JSC::UString::createNonCopying):
+        (JSC::UString::createFromUTF8):
+        * runtime/UString.h:
+        (JSC::UString::Rep::setHash):
+        (JSC::UString::~UString):
+        (JSC::makeString):
+
+2009-12-18  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Cameron Zwarich and Gavin Barraclough.
+        
+        Changed Register constructors to assignment operators, to streamline
+        moving values into registers. (In theory, there's no difference between
+        the two, since the constructor should just inline away, but there seems
+        to be a big difference in the addled mind of the GCC optimizer.)
+
+        In the interpreter, this is a 3.5% SunSpider speedup and a 1K-2K
+        reduction in stack usage per privateExecute stack frame.
+
+        * interpreter/CallFrame.h:
+        (JSC::ExecState::setCalleeArguments):
+        (JSC::ExecState::setCallerFrame):
+        (JSC::ExecState::setScopeChain):
+        (JSC::ExecState::init):
+        (JSC::ExecState::setArgumentCount):
+        (JSC::ExecState::setCallee):
+        (JSC::ExecState::setCodeBlock): Added a little bit of casting so these
+        functions could use the new Register assignment operators.
+
+        * interpreter/Register.h:
+        (JSC::Register::withInt):
+        (JSC::Register::Register):
+        (JSC::Register::operator=): Swapped in assignment operators for constructors.
+
+2009-12-18  Yongjun Zhang  <yongjun.zhang@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32713
+        [Qt] make wtf/Assertions.h compile in winscw compiler.
+
+        Add string arg before ellipsis to help winscw compiler resolve variadic
+        macro definitions in wtf/Assertions.h. 
+
+        * wtf/Assertions.h:
+
+2009-12-18  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Adam Roben.
+
+        Fixed intermittent failure seen on Windows buildbot, and in other JSC
+        API clients.
+        
+        Added a WeakGCPtr class and changed OpaqueJSClass::cachedPrototype to
+        use it, to avoid vending a stale object as a prototype.
+
+        * API/JSClassRef.cpp:
+        (OpaqueJSClassContextData::OpaqueJSClassContextData):
+        (OpaqueJSClass::prototype):
+        * API/JSClassRef.h: Use WeakGCPtr.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * runtime/WeakGCPtr.h: Added.
+        (JSC::WeakGCPtr::WeakGCPtr):
+        (JSC::WeakGCPtr::get):
+        (JSC::WeakGCPtr::clear):
+        (JSC::WeakGCPtr::operator*):
+        (JSC::WeakGCPtr::operator->):
+        (JSC::WeakGCPtr::operator!):
+        (JSC::WeakGCPtr::operator bool):
+        (JSC::WeakGCPtr::operator UnspecifiedBoolType):
+        (JSC::WeakGCPtr::assign):
+        (JSC::::operator):
+        (JSC::operator==):
+        (JSC::operator!=):
+        (JSC::static_pointer_cast):
+        (JSC::const_pointer_cast):
+        (JSC::getPtr): Added WeakGCPtr to the project.
+
+2009-12-18  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32720
+
+        * JavaScriptCore.exp:
+            - Remove exports for UString::append
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+            - Make StringBuilder a private header (was project).
+
+2009-12-18  Martin Robinson  <martin.james.robinson@gmail.com>
+
+        Reviewed by Gustavo Noronha Silva.
+
+        [GTK] GRefPtr does not take a reference when assigned a raw pointer
+        https://bugs.webkit.org/show_bug.cgi?id=32709
+
+        Ensure that when assigning a raw pointer to a GRefPtr, the reference
+        count is incremented. Also remove the GRefPtr conversion overload as
+        GRefPtr types have necessarily incompatible reference counting.
+
+        * wtf/gtk/GRefPtr.h:
+        (WTF::GRefPtr::operator=):
+
+2009-12-18  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Reviewed by Tor Arne Vestbø.
+
+        [Qt] Clean up the qmake build system to distinguish between trunk builds and package builds
+
+        https://bugs.webkit.org/show_bug.cgi?id=32716
+
+        * pcre/pcre.pri: Use standalone_package instead of QTDIR_build
+
+2009-12-18  Martin Robinson  <martin.james.robinson@gmail.com>
+
+        Reviewed by Gustavo Noronha Silva.
+
+        [GTK] Compile warning from line 29 of GRefPtr.cpp
+        https://bugs.webkit.org/show_bug.cgi?id=32703
+
+        Fix memory leak and compiler warning in GRefPtr GHashTable template
+        specialization.
+
+        * wtf/gtk/GRefPtr.cpp:
+        (WTF::refGPtr):
+
+2009-12-17  Sam Weinig  <sam@webkit.org>
+
+        Reviewed by Mark Rowe.
+
+        Add BUILDING_ON_SNOW_LEOPARD and TARGETING_SNOW_LEOPARD #defines.
+
+        * wtf/Platform.h:
+
+2009-12-17  Adam Roben  <aroben@apple.com>
+
+        Sync JavaScriptCore.vcproj with JavaScriptCore.xcodeproj and the
+        source tree
+
+        Fixes <http://webkit.org/b/32665>.
+
+        Reviewed by Ada Chan.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj: Moved
+        around files and filters so that the structure matches
+        JavaScriptCore.xcodeproj and the source tree. A few headers that were
+        previously omitted have been added, as well as JSZombie.{cpp,h}.
+
+2009-12-17  Adam Roben  <aroben@apple.com>
+
+        Remove HeavyProfile and TreeProfile completely
+
+        These were mostly removed in r42808, but the empty files were left in
+        place.
+
+        Fixes <http://webkit.org/b/32664>.
+
+        Reviewed by John Sullivan.
+
+        * Android.mk:
+        * GNUmakefile.am:
+        * JavaScriptCore.gypi:
+        * JavaScriptCore.pri:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
+        * JavaScriptCoreSources.bkl:
+        Removed HeavyProfile/TreeProfile source files.
+
+        * profiler/HeavyProfile.cpp: Removed.
+        * profiler/HeavyProfile.h: Removed.
+        * profiler/TreeProfile.cpp: Removed.
+        * profiler/TreeProfile.h: Removed.
+
+2009-12-17  Martin Robinson  <martin.james.robinson@gmail.com>
+
+        Reviewed by Gustavo Noronha Silva.
+
+        [GTK] WebKit GTK needs a wrapper for ref counted glib/gobject structs
+        https://bugs.webkit.org/show_bug.cgi?id=21599
+
+        Implement GRefPtr, a smart pointer for reference counted GObject types.
+
+        * GNUmakefile.am:
+        * wtf/gtk/GOwnPtr.cpp:
+        (WTF::GDir):
+        * wtf/gtk/GRefPtr.h: Added.
+        (WTF::):
+        (WTF::GRefPtr::GRefPtr):
+        (WTF::GRefPtr::~GRefPtr):
+        (WTF::GRefPtr::clear):
+        (WTF::GRefPtr::get):
+        (WTF::GRefPtr::operator*):
+        (WTF::GRefPtr::operator->):
+        (WTF::GRefPtr::operator!):
+        (WTF::GRefPtr::operator UnspecifiedBoolType):
+        (WTF::GRefPtr::hashTableDeletedValue):
+        (WTF::::operator):
+        (WTF::::swap):
+        (WTF::swap):
+        (WTF::operator==):
+        (WTF::operator!=):
+        (WTF::static_pointer_cast):
+        (WTF::const_pointer_cast):
+        (WTF::getPtr):
+        (WTF::adoptGRef):
+        (WTF::refGPtr):
+        (WTF::derefGPtr):
+
+2009-12-17  Gustavo Noronha Silva  <gustavo.noronha@collabora.co.uk>
+
+        Unreviewed. Build fixes for make distcheck.
+
+        * GNUmakefile.am:
+
+2009-12-16  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Fixed <rdar://problem/7355025> Interpreter::privateExecute macro generates
+        bloated code
+        
+        This patch cuts Interpreter stack use by about a third.
+
+        * bytecode/Opcode.h: Changed Opcode to const void* to work with the
+        const static initiliazation we want to do in Interpreter::privateExecute.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::Interpreter): Moved hashtable initialization here to
+        avoid polluting Interpreter::privateExecute's stack, and changed it from a
+        series of add() calls to one add() call in a loop, to cut down on code size.
+
+        (JSC::Interpreter::privateExecute): Changed a series of label computations
+        to a copy of a compile-time constant array to cut down on code size.
+
+2009-12-16  Mark Rowe  <mrowe@apple.com>
+
+        Build fix.  Disable debug variants of WebKit frameworks.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+
+2009-12-15  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam "r=me" Weinig.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32498
+        <rdar://problem/7471495>
+        REGRESSION(r51978-r52039): AJAX "Mark This Forum Read" function no longer
+        works
+        
+        Fixed a tyop.
+
+        * runtime/Operations.h:
+        (JSC::jsAdd): Use the '&&' operator, not the ',' operator.
+
+2009-12-15  Geoffrey Garen  <ggaren@apple.com>
+
+        Try to fix the windows build: don't export this inlined function.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-12-15  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Beth Dakin.
+
+        Inlined JSCell's operator new.
+        
+        3.7% speedup on bench-allocate-nonretained.js.
+
+        * JavaScriptCore.exp:
+        * runtime/JSCell.cpp:
+        * runtime/JSCell.h:
+        (JSC::JSCell::operator new):
+
+2009-12-15  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Removed the number heap, replacing it with a one-item free list for
+        numbers, taking advantage of the fact that two number cells fit inside
+        the space for one regular cell, and number cells don't require destruction.
+        
+        SunSpider says 1.6% faster in JSVALUE32 mode (the only mode that
+        heap-allocates numbers).
+        
+        SunSpider says 1.1% faster in JSVALUE32_64 mode. v8 says 0.8% faster
+        in JSVALUE32_64 mode. 10% speedup on bench-alloc-nonretained.js. 6%
+        speedup on bench-alloc-retained.js.
+        
+        There's a lot of formulaic change in this patch, but not much substance.
+
+        * JavaScriptCore.exp:
+        * debugger/Debugger.cpp:
+        (JSC::Debugger::recompileAllJSFunctions):
+        * runtime/Collector.cpp:
+        (JSC::Heap::Heap):
+        (JSC::Heap::destroy):
+        (JSC::Heap::allocateBlock):
+        (JSC::Heap::freeBlock):
+        (JSC::Heap::freeBlockPtr):
+        (JSC::Heap::freeBlocks):
+        (JSC::Heap::recordExtraCost):
+        (JSC::Heap::allocate):
+        (JSC::Heap::resizeBlocks):
+        (JSC::Heap::growBlocks):
+        (JSC::Heap::shrinkBlocks):
+        (JSC::Heap::markConservatively):
+        (JSC::Heap::clearMarkBits):
+        (JSC::Heap::markedCells):
+        (JSC::Heap::sweep):
+        (JSC::Heap::markRoots):
+        (JSC::Heap::objectCount):
+        (JSC::Heap::addToStatistics):
+        (JSC::Heap::statistics):
+        (JSC::Heap::isBusy):
+        (JSC::Heap::reset):
+        (JSC::Heap::collectAllGarbage):
+        (JSC::Heap::primaryHeapBegin):
+        (JSC::Heap::primaryHeapEnd):
+        * runtime/Collector.h:
+        (JSC::): Removed all code pertaining to the number heap, and changed all
+        heap template functions and classes to non-template functions and classes.
+
+        (JSC::Heap::allocateNumber): A new optimization to replace the number
+        heap: allocate half-sized number cells in pairs, returning the first
+        cell and caching the second cell for the next allocation.
+
+        * runtime/CollectorHeapIterator.h:
+        (JSC::LiveObjectIterator::LiveObjectIterator):
+        (JSC::LiveObjectIterator::operator++):
+        (JSC::DeadObjectIterator::DeadObjectIterator):
+        (JSC::DeadObjectIterator::operator++):
+        (JSC::ObjectIterator::ObjectIterator):
+        (JSC::ObjectIterator::operator++):
+        * runtime/JSCell.h:
+        (JSC::JSCell::isNumber): Removed all code pertaining to the number heap,
+        and changed all heap template functions and classes to non-template functions
+        and classes.
+
+2009-12-15  Zoltan Horvath  <zoltan@webkit.org>
+
+        Reviewed by Darin Adler.
+
+        Allow custom memory allocation control for WeakGCMap class
+        https://bugs.webkit.org/show_bug.cgi?id=32547
+
+        Inherits WeakGCMap from FastAllocBase because it is instantiated by
+        'new' at: WebCore/dom/Document.cpp:512.
+
+        * runtime/WeakGCMap.h:
+
+2009-12-15  Zoltan Horvath  <zoltan@webkit.org>
+
+        Reviewed by Darin Adler.
+
+        Allow custom memory allocation control for dtoa's P5Node struct
+        https://bugs.webkit.org/show_bug.cgi?id=32544
+
+        Inherits P5Node struct from Noncopyable because it is instantiated by
+        'new' at wtf/dtoa.cpp:588 and don't need to be copyable.
+
+        * wtf/dtoa.cpp:
+
+2009-12-14  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Simon Fraser.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32524
+        REGRESSION(52084): fast/dom/prototypes.html failing two CSS tests
+
+        * wtf/StdLibExtras.h:
+        (WTF::bitCount): The original patch put the parentheses in the wrong
+        place, completely changing the calculation and making it almost always
+        wrong. Moved the parentheses around the '+' operation, like the original
+        compiler warning suggested.
+
+2009-12-14  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Unreviewed trivial buildfix.
+
+        Fix crosses initialization of usedPrimaryBlocks for JSValue32
+
+        * runtime/Collector.cpp:
+        (JSC::Heap::markConservatively):
+
+2009-12-14  Csaba Osztrogonác  <ossy@webkit.org>
+
+        Reviewed by Simon Hausmann.
+
+        GCC 4.3.x warning fixed. Suggested parantheses added.
+        warning: ../../../JavaScriptCore/wtf/StdLibExtras.h:77: warning: suggest parentheses around + or - in operand of &
+
+        * wtf/StdLibExtras.h:
+        (WTF::bitCount):
+
+2009-12-13  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+        
+        Changed GC from mark-sweep to mark-allocate.
+        
+        Added WeakGCMap to keep WebCore blissfully ignorant about objects that
+        have become garbage but haven't run their destructors yet.
+        
+        1% SunSpider speedup.
+        7.6% v8 speedup (37% splay speedup).
+        17% speedup on bench-alloc-nonretained.js.
+        18% speedup on bench-alloc-retained.js.
+
+        * API/JSBase.cpp:
+        (JSGarbageCollect):
+        * API/JSContextRef.cpp:
+        * JavaScriptCore.exp:
+        * JavaScriptCore.xcodeproj/project.pbxproj: Updated for renames and new
+        files.
+
+        * debugger/Debugger.cpp:
+        (JSC::Debugger::recompileAllJSFunctions): Updated to use the Collector
+        iterator abstraction.
+
+        * jsc.cpp:
+        (functionGC): Updated for rename.
+
+        * runtime/Collector.cpp: Slightly reduced the number of allocations per
+        collection, so that small workloads only allocate on collector block,
+        rather than two.
+
+        (JSC::Heap::Heap): Updated to use the new allocateBlock function.
+
+        (JSC::Heap::destroy): Updated to use the new freeBlocks function.
+
+        (JSC::Heap::allocateBlock): New function to initialize a block when
+        allocating it.
+
+        (JSC::Heap::freeBlock): Consolidated the responsibility for running
+        destructors into this function.
+
+        (JSC::Heap::freeBlocks): Updated to use freeBlock.
+
+        (JSC::Heap::recordExtraCost): Sweep the heap in this reporting function,
+        so that allocation, which is more common, doesn't have to check extraCost.
+
+        (JSC::Heap::heapAllocate): Run destructors right before recycling a
+        garbage cell. This has better cache utilization than a separate sweep phase.
+
+        (JSC::Heap::resizeBlocks):
+        (JSC::Heap::growBlocks):
+        (JSC::Heap::shrinkBlocks): New set of functions for managing the size of
+        the heap, now that the heap doesn't maintain any information about its
+        size.
+
+        (JSC::isPointerAligned):
+        (JSC::isHalfCellAligned):
+        (JSC::isPossibleCell):
+        (JSC::isCellAligned):
+        (JSC::Heap::markConservatively): Cleaned up this code a bit.
+
+        (JSC::Heap::clearMarkBits):
+        (JSC::Heap::markedCells): Some helper functions for examining the the mark
+        bitmap.
+
+        (JSC::Heap::sweep): Simplified this function by using a DeadObjectIterator.
+
+        (JSC::Heap::markRoots): Reordered some operations for clarity.
+
+        (JSC::Heap::objectCount):
+        (JSC::Heap::addToStatistics):
+        (JSC::Heap::statistics): Rewrote these functions to calculate an object
+        count on demand, since the heap doesn't maintain this information by 
+        itself.
+
+        (JSC::Heap::reset): New function for resetting the heap once we've
+        exhausted heap space.
+
+        (JSC::Heap::collectAllGarbage): This function matches the old collect()
+        behavior, but it's now an uncommon function used only by API.
+
+        * runtime/Collector.h:
+        (JSC::CollectorBitmap::count):
+        (JSC::CollectorBitmap::isEmpty): Added some helper functions for managing
+        the collector mark bitmap.
+
+        (JSC::Heap::reportExtraMemoryCost): Changed reporting from cell equivalents
+        to bytes, so it's easier to understand.
+        
+        * runtime/CollectorHeapIterator.h:
+        (JSC::CollectorHeapIterator::CollectorHeapIterator):
+        (JSC::CollectorHeapIterator::operator!=):
+        (JSC::CollectorHeapIterator::operator*):
+        (JSC::CollectorHeapIterator::advance):
+        (JSC::::LiveObjectIterator):
+        (JSC::::operator):
+        (JSC::::DeadObjectIterator):
+        (JSC::::ObjectIterator): New iterators for encapsulating details about
+        heap layout, and what's live and dead on the heap.
+
+        * runtime/JSArray.cpp:
+        (JSC::JSArray::putSlowCase):
+        (JSC::JSArray::increaseVectorLength): Delay reporting extra cost until
+        we're fully constructed, so the heap mark phase won't visit us in an
+        invalid state.
+
+        * runtime/JSCell.h:
+        (JSC::JSCell::):
+        (JSC::JSCell::createDummyStructure):
+        (JSC::JSCell::JSCell):
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::JSGlobalData):
+        * runtime/JSGlobalData.h: Added a dummy cell to simplify allocation logic.
+
+        * runtime/JSString.h:
+        (JSC::jsSubstring): Don't report extra cost for substrings, since they
+        share a buffer that's already reported extra cost.
+
+        * runtime/Tracing.d:
+        * runtime/Tracing.h: Changed these dtrace hooks not to report object
+        counts, since they're no longer cheap to compute.
+
+        * runtime/UString.h: Updated for renames.
+
+        * runtime/WeakGCMap.h: Added.
+        (JSC::WeakGCMap::isEmpty):
+        (JSC::WeakGCMap::uncheckedGet):
+        (JSC::WeakGCMap::uncheckedBegin):
+        (JSC::WeakGCMap::uncheckedEnd):
+        (JSC::::get):
+        (JSC::::take):
+        (JSC::::set):
+        (JSC::::uncheckedRemove): Mentioned above.
+
+        * wtf/StdLibExtras.h:
+        (WTF::bitCount): Added a bit population count function, so the heap can
+        count live objects to fulfill statistics questions.
+
+The very last cell in the block is not allocated -- should not be marked.
+
+2009-12-13  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: Export some new symbols.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-12-13  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: Removed some old exports.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-12-13  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: Use unsigned instead of uint32_t to avoid dependencies.
+
+        * wtf/StdLibExtras.h:
+        (WTF::bitCount):
+
+2009-12-13  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (speculative Windows build fix).
+
+        * runtime/JSGlobalObjectFunctions.cpp:
+
+2009-12-13  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32496
+        Switch remaining cases of string construction to use StringBuilder.
+        Builds strings using a vector rather than using string append / addition.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * runtime/Executable.cpp:
+        (JSC::FunctionExecutable::paramString):
+        * runtime/FunctionConstructor.cpp:
+        (JSC::constructFunction):
+        * runtime/JSGlobalObjectFunctions.cpp:
+        (JSC::encode):
+        (JSC::decode):
+        (JSC::globalFuncEscape):
+        (JSC::globalFuncUnescape):
+        * runtime/JSONObject.cpp:
+        (JSC::Stringifier::stringify):
+        (JSC::Stringifier::indent):
+        * runtime/JSString.h:
+        * runtime/LiteralParser.cpp:
+        (JSC::LiteralParser::Lexer::lexString):
+        * runtime/NumberPrototype.cpp:
+        (JSC::integerPartNoExp):
+        (JSC::numberProtoFuncToFixed):
+        (JSC::numberProtoFuncToPrecision):
+        * runtime/Operations.h:
+        (JSC::jsString):
+        * runtime/StringPrototype.cpp:
+        (JSC::substituteBackreferencesSlow):
+        (JSC::substituteBackreferences):
+        (JSC::stringProtoFuncConcat):
+
+2009-12-08  Jeremy Moskovich  <jeremy@chromium.org>
+
+        Reviewed by Eric Seidel.
+
+        Add code to allow toggling ATSUI/Core Text rendering at runtime in ComplexTextController.
+        https://bugs.webkit.org/show_bug.cgi?id=31802
+
+        The goal here is to allow for a zero runtime hit for ports that decide to select
+        the API at compile time.
+        When both USE(ATSUI) and USE(CORE_TEXT) are true, the API is toggled
+        at runtime.  Core Text is used for OS Versions >= 10.6.
+
+        * wtf/Platform.h: #define USE_CORE_TEXT and USE_ATSUI on Chrome/Mac.
+
+2009-12-11  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Unify codegen for forward and backward variants of branches
+        https://bugs.webkit.org/show_bug.cgi?id=32463
+
+        * jit/JIT.h:
+        (JSC::JIT::emit_op_loop): Implemented in terms of forward variant.
+        (JSC::JIT::emit_op_loop_if_true): ditto
+        (JSC::JIT::emitSlow_op_loop_if_true): ditto
+        (JSC::JIT::emit_op_loop_if_false): ditto
+        (JSC::JIT::emitSlow_op_loop_if_false): ditto
+        (JSC::JIT::emit_op_loop_if_less): ditto
+        (JSC::JIT::emitSlow_op_loop_if_less): ditto
+        * jit/JITOpcodes.cpp:
+
+2009-12-11  Sam Weinig  <sam@webkit.org>
+
+        Reviewed by Anders Carlsson.
+
+        Allow WTFs concept of the main thread to differ from pthreads when necessary.
+
+        * wtf/ThreadingPthreads.cpp:
+        (WTF::initializeThreading):
+        (WTF::isMainThread):
+        * wtf/mac/MainThreadMac.mm:
+        (WTF::initializeMainThreadPlatform):
+        (WTF::scheduleDispatchFunctionsOnMainThread):
+
+2009-12-11  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32454
+        Refactor construction of simple strings to avoid string concatenation.
+
+        Building strings through concatenation has a memory and performance cost -
+        a memory cost since we must over-allocate the buffer to leave space to append
+        into, and performance in that the string may still require reallocation (and
+        thus copying during construction).  Instead move the full construction to
+        within a single function call (makeString), so that the arguments' lengths
+        can be calculated and an appropriate sized buffer allocated before copying
+        any characters.
+
+        ~No performance change (~2% progression on date tests).
+
+        * bytecode/CodeBlock.cpp:
+        (JSC::escapeQuotes):
+        (JSC::valueToSourceString):
+        (JSC::constantName):
+        (JSC::idName):
+        (JSC::CodeBlock::registerName):
+        (JSC::regexpToSourceString):
+        (JSC::regexpName):
+        * bytecompiler/NodesCodegen.cpp:
+        (JSC::substitute):
+        * profiler/Profiler.cpp:
+        (JSC::Profiler::createCallIdentifier):
+        * runtime/DateConstructor.cpp:
+        (JSC::callDate):
+        * runtime/DateConversion.cpp:
+        (JSC::formatDate):
+        (JSC::formatDateUTCVariant):
+        (JSC::formatTime):
+        (JSC::formatTimeUTC):
+        * runtime/DateConversion.h:
+        (JSC::):
+        * runtime/DatePrototype.cpp:
+        (JSC::dateProtoFuncToString):
+        (JSC::dateProtoFuncToUTCString):
+        (JSC::dateProtoFuncToDateString):
+        (JSC::dateProtoFuncToTimeString):
+        (JSC::dateProtoFuncToGMTString):
+        * runtime/ErrorPrototype.cpp:
+        (JSC::errorProtoFuncToString):
+        * runtime/ExceptionHelpers.cpp:
+        (JSC::createUndefinedVariableError):
+        (JSC::createErrorMessage):
+        (JSC::createInvalidParamError):
+        * runtime/FunctionPrototype.cpp:
+        (JSC::insertSemicolonIfNeeded):
+        (JSC::functionProtoFuncToString):
+        * runtime/ObjectPrototype.cpp:
+        (JSC::objectProtoFuncToString):
+        * runtime/RegExpConstructor.cpp:
+        (JSC::constructRegExp):
+        * runtime/RegExpObject.cpp:
+        (JSC::RegExpObject::match):
+        * runtime/RegExpPrototype.cpp:
+        (JSC::regExpProtoFuncCompile):
+        (JSC::regExpProtoFuncToString):
+        * runtime/StringPrototype.cpp:
+        (JSC::stringProtoFuncBig):
+        (JSC::stringProtoFuncSmall):
+        (JSC::stringProtoFuncBlink):
+        (JSC::stringProtoFuncBold):
+        (JSC::stringProtoFuncFixed):
+        (JSC::stringProtoFuncItalics):
+        (JSC::stringProtoFuncStrike):
+        (JSC::stringProtoFuncSub):
+        (JSC::stringProtoFuncSup):
+        (JSC::stringProtoFuncFontcolor):
+        (JSC::stringProtoFuncFontsize):
+        (JSC::stringProtoFuncAnchor):
+        * runtime/UString.h:
+        (JSC::):
+        (JSC::makeString):
+
+2009-12-10  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32400
+        Switch remaining cases of string addition to use ropes.
+
+        Re-landing r51975 - added toPrimitiveString method,
+        performs toPrimitive then subsequent toString operations.
+
+        ~1% progression on Sunspidey.
+
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/JSString.h:
+        (JSC::JSString::JSString):
+        (JSC::JSString::appendStringInConstruct):
+        * runtime/Operations.cpp:
+        (JSC::jsAddSlowCase):
+        * runtime/Operations.h:
+        (JSC::jsString):
+        (JSC::jsAdd):
+
+2009-12-11  Adam Roben  <aroben@apple.com>
+
+        Windows build fix
+
+        * JavaScriptCore.vcproj/jsc/jscCommon.vsprops: Added
+        $(WebKitOutputDir)/include/private to the include path.
+
+2009-12-11  Adam Roben  <aroben@apple.com>
+
+        Move QuartzCorePresent.h to include/private
+
+        This fixes other projects that use wtf/Platform.h
+
+        Rubber-stamped by Steve Falkenburg.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj: Let VS do its thang.
+        * JavaScriptCore.vcproj/JavaScriptCore/build-generated-files.sh: Write
+        QuartzCorePresent.h to $(WebKitOutputDir)/include/private.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreCommon.vsprops:
+        * JavaScriptCore.vcproj/WTF/WTFCommon.vsprops:
+        Added $(WebKitOutputDir)/include/private to the include path.
+
+2009-12-11  Adam Roben  <aroben@apple.com>
+
+        Fix clean builds and everything rebuilding on every build
+
+        Reviewed by Sam Weinig.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/build-generated-files.sh: Don't
+        write out QuartzCorePresent.h if it exists but is older than
+        QuartzCore.h. Also, create the directory we write QuartzCorePresent.h
+        into first.
+
+2009-12-11  Adam Roben  <aroben@apple.com>
+
+        Windows build fix for systems with spaces in their paths
+
+        * JavaScriptCore.vcproj/JavaScriptCore/build-generated-files.sh: Quote some paths.
+
+2009-12-11  Chris Marrin  <cmarrin@apple.com>
+
+        Reviewed by Adam Roben.
+
+        Add check for presence of QuartzCore headers
+        https://bugs.webkit.org/show_bug.cgi?id=31856
+        
+        The script now checks for the presence of QuartzCore.h. If present
+        it will turn on ACCELERATED_COMPOSITING and 3D_RENDERING to enable
+        HW compositing on Windows. The script writes QuartzCorePresent.h to
+        the build directory which has a define telling whether QuartzCore is 
+        present.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/build-generated-files.sh:
+        * wtf/Platform.h:
+
+2009-12-11  Kent Tamura  <tkent@chromium.org>
+
+        Reviewed by Darin Adler.
+
+        Fix a problem that JSC::gregorianDateTimeToMS() returns a negative
+        value for a huge year value.
+        https://bugs.webkit.org/show_bug.cgi?id=32304
+
+        * wtf/DateMath.cpp:
+        (WTF::dateToDaysFrom1970): Renamed from dateToDayInYear, and changed the return type to double.
+        (WTF::calculateDSTOffset): Follow the dateToDaysFrom1970() change.
+        (WTF::timeClip): Use maxECMAScriptTime.
+        (JSC::gregorianDateTimeToMS): Follow the dateToDaysFrom1970() change.
+
+2009-12-10  Adam Barth  <abarth@webkit.org>
+
+        No review, rolling out r51975.
+        http://trac.webkit.org/changeset/51975
+
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/JSString.h:
+        (JSC::JSString::JSString):
+        (JSC::JSString::appendStringInConstruct):
+        * runtime/Operations.cpp:
+        (JSC::jsAddSlowCase):
+        * runtime/Operations.h:
+        (JSC::jsString):
+        (JSC::jsAdd):
+
+2009-12-10  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Incorrect caching of prototype lookup with dictionary base
+        https://bugs.webkit.org/show_bug.cgi?id=32402
+
+        Make sure we don't add cached prototype lookup to the proto_list
+        lookup chain if the top level object is a dictionary.
+
+        * jit/JITStubs.cpp:
+        (JSC::JITThunks::tryCacheGetByID):
+
+2009-12-10  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32400
+        Switch remaining cases of string addition to use ropes.
+
+        ~1% progression on Sunspidey.
+
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/JSString.h:
+        (JSC::JSString::JSString):
+        (JSC::JSString::appendStringInConstruct):
+        * runtime/Operations.cpp:
+        (JSC::jsAddSlowCase):
+        * runtime/Operations.h:
+        (JSC::jsString):
+        (JSC::jsAdd):
+
+2009-12-10  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Geoffrey Garen.
+
+        Remove JSObject::getPropertyAttributes() and all usage of it.
+        https://bugs.webkit.org/show_bug.cgi?id=31933
+
+        getOwnPropertyDescriptor() should be used instead.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.order:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * debugger/DebuggerActivation.cpp:
+        (JSC::DebuggerActivation::getOwnPropertyDescriptor):
+        * debugger/DebuggerActivation.h:
+        * runtime/JSObject.cpp:
+        (JSC::JSObject::propertyIsEnumerable):
+        * runtime/JSObject.h:
+        * runtime/JSVariableObject.cpp:
+        * runtime/JSVariableObject.h:
+
+2009-12-10  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt & Mark Rowe.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32367
+        Add support for short Ropes (up to 3 entries) inline within JSString.
+        (rather than externally allocating an object to hold the rope).
+        Switch jsAdd of (JSString* + JSString*) to now make use of Ropes.
+
+        ~1% progression on Sunspidey.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::privateExecute):
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::privateCompileCTIMachineTrampolines):
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/JSString.cpp:
+        (JSC::JSString::resolveRope):
+        (JSC::JSString::toBoolean):
+        (JSC::JSString::getStringPropertyDescriptor):
+        * runtime/JSString.h:
+        (JSC::JSString::Rope::Fiber::deref):
+        (JSC::JSString::Rope::Fiber::ref):
+        (JSC::JSString::Rope::Fiber::refAndGetLength):
+        (JSC::JSString::Rope::append):
+        (JSC::JSString::JSString):
+        (JSC::JSString::~JSString):
+        (JSC::JSString::value):
+        (JSC::JSString::tryGetValue):
+        (JSC::JSString::length):
+        (JSC::JSString::canGetIndex):
+        (JSC::JSString::appendStringInConstruct):
+        (JSC::JSString::appendValueInConstructAndIncrementLength):
+        (JSC::JSString::isRope):
+        (JSC::JSString::string):
+        (JSC::JSString::ropeLength):
+        (JSC::JSString::getStringPropertySlot):
+        * runtime/Operations.h:
+        (JSC::jsString):
+        (JSC::jsAdd):
+        (JSC::resolveBase):
+
+2009-12-09  Anders Carlsson  <andersca@apple.com>
+
+        Reviewed by Geoffrey Garen.
+
+        Fix three more things found by compiling with clang++.
+        
+        * runtime/Structure.h:
+        (JSC::StructureTransitionTable::reifySingleTransition):
+        Add the 'std' qualifier to the call to make_pair.
+
+        * wtf/DateMath.cpp:
+        (WTF::initializeDates):
+        Incrementing a bool is deprecated according to the C++ specification.
+        
+        * wtf/PtrAndFlags.h:
+        (WTF::PtrAndFlags::PtrAndFlags):
+        Name lookup should not be done in dependent bases, so explicitly qualify the call to set.
+
+2009-12-09  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Google reader gets stuck in the "Loading..." state and does not complete
+        https://bugs.webkit.org/show_bug.cgi?id=32256
+        <rdar://problem/7456388>
+
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::emitSlow_op_jless): Fix some backward branches.
+
+2009-12-09  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32228
+        Make destruction of ropes non-recursive to prevent stack exhaustion.
+        Also, pass a UString& into initializeFiber rather than a Ustring::Rep*,
+        since the Rep is not being ref counted this could result in usage of a
+        Rep with refcount zero (where the Rep comes from a temporary UString
+        returned from a function).
+
+        * runtime/JSString.cpp:
+        (JSC::JSString::Rope::destructNonRecursive):
+        (JSC::JSString::Rope::~Rope):
+        * runtime/JSString.h:
+        (JSC::JSString::Rope::initializeFiber):
+        * runtime/Operations.h:
+        (JSC::concatenateStrings):
+
+2009-12-09  Zoltan Herczeg  <zherczeg@inf.u-szeged.hu>
+
+        Reviewed by Eric Seidel.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31930
+
+        Update to r51457. ASSERTs changed to COMPILE_ASSERTs.
+        The speedup is 25%.
+
+        * runtime/JSGlobalData.cpp:
+        (JSC::VPtrSet::VPtrSet):
+
+2009-12-09  Steve Block  <steveblock@google.com>
+
+        Reviewed by Adam Barth.
+
+        Updates Android Makefiles with latest additions.
+        https://bugs.webkit.org/show_bug.cgi?id=32278
+
+        * Android.mk: Modified.
+        * Android.v8.wtf.mk: Modified.
+
+2009-12-09  Sam Weinig  <sam@webkit.org>
+
+        Reviewed by Gavin Barraclough.
+
+        Fix a bug found while trying to compile JavaScriptCore with clang++.
+
+        * yarr/RegexPattern.h:
+        (JSC::Yarr::PatternTerm::PatternTerm): Don't self assign here.  Use false instead.
+
+2009-12-09  Anders Carlsson  <andersca@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Attempt to fix the Windows build.
+        
+        * wtf/FastMalloc.h:
+
+2009-12-09  Anders Carlsson  <andersca@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Fix some things found while trying to compile JavaScriptCore with clang++.
+
+        * wtf/FastMalloc.h:
+        Add correct exception specifications for the allocation/deallocation operators.
+        
+        * wtf/Vector.h:
+        * wtf/VectorTraits.h:
+        Fix a bunch of struct/class mismatches.
+
+2009-12-08  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Darin Adler.
+
+        move code generation portions of Nodes.cpp to bytecompiler directory
+        https://bugs.webkit.org/show_bug.cgi?id=32284
+
+        * bytecompiler/NodesCodegen.cpp: Copied from parser/Nodes.cpp. Removed parts that
+        are not about codegen.
+        * parser/Nodes.cpp: Removed everything that is about codegen.
+
+        Update build systems:
+        
+        * Android.mk:
+        * GNUmakefile.am:
+        * JavaScriptCore.gypi:
+        * JavaScriptCore.pri:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * JavaScriptCoreSources.bkl:
+
+2009-12-08  Kevin Watters  <kevinwatters@gmail.com>
+
+        Reviewed by Kevin Ollivier.
+
+        [wx] Mac plugins support.
+        
+        https://bugs.webkit.org/show_bug.cgi?id=32236
+
+        * wtf/Platform.h:
+
+2009-12-08  Dmitry Titov  <dimich@chromium.org>
+
+        Rubber-stamped by David Levin.
+
+        Revert and reopen "Add asserts to RefCounted to make sure ref/deref happens on the right thread."
+        It may have caused massive increase of reported leaks on the bots.
+        https://bugs.webkit.org/show_bug.cgi?id=31639
+
+        * GNUmakefile.am:
+        * JavaScriptCore.gypi:
+        * JavaScriptCore.vcproj/WTF/WTF.vcproj:
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * runtime/Structure.cpp:
+        (JSC::Structure::Structure):
+        * wtf/RefCounted.h:
+        (WTF::RefCountedBase::ref):
+        (WTF::RefCountedBase::hasOneRef):
+        (WTF::RefCountedBase::refCount):
+        (WTF::RefCountedBase::derefBase):
+        * wtf/ThreadVerifier.h: Removed.
+
+2009-12-08  Gustavo Noronha Silva  <gustavo.noronha@collabora.co.uk>
+
+        Reviewed by Darin Adler.
+
+        Make WebKit build correctly on FreeBSD, IA64, and Alpha.
+        Based on work by Petr Salinger <Petr.Salinger@seznam.cz>,
+        and Colin Watson <cjwatson@ubuntu.com>.
+
+        * wtf/Platform.h:
+
+2009-12-08  Dmitry Titov  <dimich@chromium.org>
+
+        Reviewed by Darin Adler.
+
+        Add asserts to RefCounted to make sure ref/deref happens on the right thread.
+        https://bugs.webkit.org/show_bug.cgi?id=31639
+
+        * runtime/Structure.cpp:
+        (JSC::Structure::Structure): Disable thread verification on this class since it uses addressOfCount().
+        * wtf/RefCounted.h:
+        (WTF::RefCountedBase::ref): Add ASSERT.
+        (WTF::RefCountedBase::hasOneRef): Ditto.
+        (WTF::RefCountedBase::refCount): Ditto.
+        (WTF::RefCountedBase::derefBase): Ditto.
+        (WTF::RefCountedBase::disableThreadVerification): delegate to ThreadVerifier method.
+        * wtf/ThreadVerifier.h: Added.
+        (WTF::ThreadVerifier::ThreadVerifier): New Debug-only class to verify that ref/deref of RefCounted is done on the same thread.
+        (WTF::ThreadVerifier::activate): Activates checks. Called when ref count becomes above 2.
+        (WTF::ThreadVerifier::deactivate): Deactivates checks. Called when ref count drops below 2.
+        (WTF::ThreadVerifier::disableThreadVerification): used on objects that should not be checked (StringImpl etc)
+        (WTF::ThreadVerifier::verifyThread):
+        * GNUmakefile.am: Add ThreadVerifier.h to the build file.
+        * JavaScriptCore.gypi: Ditto.
+        * JavaScriptCore.vcproj/WTF/WTF.vcproj: Ditto.
+        * JavaScriptCore.xcodeproj/project.pbxproj: Ditto.
+
+2009-12-08  Steve Block  <steveblock@google.com>
+
+        Reviewed by Adam Barth.
+
+        [Android] Adds Makefiles for Android port.
+        https://bugs.webkit.org/show_bug.cgi?id=31325
+
+        * Android.mk: Added.
+        * Android.v8.wtf.mk: Added.
+
+2009-12-07  Dmitry Titov  <dimich@chromium.org>
+
+        Rubber-stamped by Darin Adler.
+
+        Remove ENABLE_SHARED_SCRIPT flags
+        https://bugs.webkit.org/show_bug.cgi?id=32245
+        This patch was obtained by "git revert" command and then un-reverting of ChangeLog files.
+
+        * Configurations/FeatureDefines.xcconfig:
+        * wtf/Platform.h:
+
+2009-12-07  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (Windows build fixage part I).
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-12-05  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32184
+        Handle out-of-memory conditions with JSC Ropes with a JS exception, rather than crashing.
+        Switch from using fastMalloc to tryFastMalloc, pass an ExecState to record the exception on.
+
+        * API/JSCallbackObjectFunctions.h:
+        (JSC::::toString):
+        * API/JSValueRef.cpp:
+        (JSValueIsStrictEqual):
+        * JavaScriptCore.exp:
+        * bytecompiler/BytecodeGenerator.cpp:
+        (JSC::BytecodeGenerator::emitEqualityOp):
+        * debugger/DebuggerCallFrame.cpp:
+        (JSC::DebuggerCallFrame::functionName):
+        (JSC::DebuggerCallFrame::calculatedFunctionName):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::callEval):
+        (JSC::Interpreter::privateExecute):
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+        * profiler/ProfileGenerator.cpp:
+        (JSC::ProfileGenerator::addParentForConsoleStart):
+        * profiler/Profiler.cpp:
+        (JSC::Profiler::willExecute):
+        (JSC::Profiler::didExecute):
+        (JSC::Profiler::createCallIdentifier):
+        (JSC::createCallIdentifierFromFunctionImp):
+        * profiler/Profiler.h:
+        * runtime/ArrayPrototype.cpp:
+        (JSC::arrayProtoFuncIndexOf):
+        (JSC::arrayProtoFuncLastIndexOf):
+        * runtime/DateConstructor.cpp:
+        (JSC::constructDate):
+        * runtime/FunctionPrototype.cpp:
+        (JSC::functionProtoFuncToString):
+        * runtime/InternalFunction.cpp:
+        (JSC::InternalFunction::name):
+        (JSC::InternalFunction::displayName):
+        (JSC::InternalFunction::calculatedDisplayName):
+        * runtime/InternalFunction.h:
+        * runtime/JSCell.cpp:
+        (JSC::JSCell::getString):
+        * runtime/JSCell.h:
+        (JSC::JSValue::getString):
+        * runtime/JSONObject.cpp:
+        (JSC::gap):
+        (JSC::Stringifier::Stringifier):
+        (JSC::Stringifier::appendStringifiedValue):
+        * runtime/JSObject.cpp:
+        (JSC::JSObject::putDirectFunction):
+        (JSC::JSObject::putDirectFunctionWithoutTransition):
+        (JSC::JSObject::defineOwnProperty):
+        * runtime/JSObject.h:
+        * runtime/JSPropertyNameIterator.cpp:
+        (JSC::JSPropertyNameIterator::get):
+        * runtime/JSString.cpp:
+        (JSC::JSString::Rope::~Rope):
+        (JSC::JSString::resolveRope):
+        (JSC::JSString::getPrimitiveNumber):
+        (JSC::JSString::toNumber):
+        (JSC::JSString::toString):
+        (JSC::JSString::toThisString):
+        (JSC::JSString::getStringPropertyDescriptor):
+        * runtime/JSString.h:
+        (JSC::JSString::Rope::createOrNull):
+        (JSC::JSString::Rope::operator new):
+        (JSC::JSString::value):
+        (JSC::JSString::tryGetValue):
+        (JSC::JSString::getIndex):
+        (JSC::JSString::getStringPropertySlot):
+        (JSC::JSValue::toString):
+        * runtime/JSValue.h:
+        * runtime/NativeErrorConstructor.cpp:
+        (JSC::NativeErrorConstructor::NativeErrorConstructor):
+        * runtime/Operations.cpp:
+        (JSC::JSValue::strictEqualSlowCase):
+        * runtime/Operations.h:
+        (JSC::JSValue::equalSlowCaseInline):
+        (JSC::JSValue::strictEqualSlowCaseInline):
+        (JSC::JSValue::strictEqual):
+        (JSC::jsLess):
+        (JSC::jsLessEq):
+        (JSC::jsAdd):
+        (JSC::concatenateStrings):
+        * runtime/PropertyDescriptor.cpp:
+        (JSC::PropertyDescriptor::equalTo):
+        * runtime/PropertyDescriptor.h:
+        * runtime/StringPrototype.cpp:
+        (JSC::stringProtoFuncReplace):
+        (JSC::stringProtoFuncToLowerCase):
+        (JSC::stringProtoFuncToUpperCase):
+
+2009-12-07  Nikolas Zimmermann  <nzimmermann@rim.com>
+
+        Reviewed by Holger Freyther.
+
+        Turn on (SVG) Filters support, by default.
+        https://bugs.webkit.org/show_bug.cgi?id=32224
+
+        * Configurations/FeatureDefines.xcconfig: Enable FILTERS build flag.
+
+2009-12-07  Steve Falkenburg  <sfalken@apple.com>
+
+        Build fix. Be flexible about which version of ICU is used on Windows.
+
+        * JavaScriptCore.vcproj/jsc/jscCommon.vsprops: Add optional xcopy commands to copy ICU 4.2.
+
+2009-12-07  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        op_loop_if_less JIT codegen is broken for 64-bit
+        https://bugs.webkit.org/show_bug.cgi?id=32221
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_loop_if_false): Fix codegen in this version - test was backwards.
+
+2009-12-07  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        Object.create fails if properties on the descriptor are getters
+        https://bugs.webkit.org/show_bug.cgi?id=32219
+
+        Correctly initialise the PropertySlots with the descriptor object.
+
+        * runtime/ObjectConstructor.cpp:
+        (JSC::toPropertyDescriptor):
+
+2009-12-06  Maciej Stachowiak  <mjs@apple.com>
+
+        Not reviewed, build fix.
+
+        Actually tested 64-bit *and* 32-bit build this time.
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_loop_if_false):
+
+2009-12-06  Maciej Stachowiak  <mjs@apple.com>
+
+        Not reviewed, build fix.
+
+        Really really fix 64-bit build for prior patch (actually tested this time).
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_loop_if_false):
+        (JSC::JIT::emitSlow_op_loop_if_false):
+
+2009-12-06  Maciej Stachowiak  <mjs@apple.com>
+
+        Not reviewed, build fix.
+
+        Really fix 64-bit build for prior patch.
+
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::emitSlow_op_jless):
+
+2009-12-06  Maciej Stachowiak  <mjs@apple.com>
+
+        Not reviewed, build fix.
+
+        Fix 64-bit build for prior patch.
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emitSlow_op_loop_if_less):
+
+2009-12-05  Maciej Stachowiak  <mjs@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        conway benchmark spends half it's time in op_less (jump fusion fails)
+        https://bugs.webkit.org/show_bug.cgi?id=32190
+
+        <1% speedup on SunSpider and V8
+        2x speedup on "conway" benchmark
+        
+        Two optimizations:
+        1) Improve codegen for logical operators &&, || and ! in a condition context
+        
+        When generating code for combinations of &&, || and !, in a
+        condition context (i.e. in an if statement or loop condition), we
+        used to produce a value, and then separately jump based on its
+        truthiness. Now we pass the false and true targets in, and let the
+        logical operators generate jumps directly. This helps in four
+        ways:
+
+        a) Individual clauses of a short-circuit logical operator can now
+        jump directly to the then or else clause of an if statement (or to
+        the top or exit of a loop) instead of jumping to a jump.
+        
+        b) It used to be that jump fusion with the condition of the first
+        clause of a logical operator was inhibited, because the register
+        was ref'd to be used later, in the actual condition jump; this no
+        longer happens since a jump straight to the final target is
+        generated directly.
+
+        c) It used to be that jump fusion with the condition of the second
+        clause of a logical operator was inhibited, because there was a
+        jump target right after the second clause and before the actual
+        condition jump. But now it's no longer necessary for the first
+        clause to jump there so jump fusion is not blocked.
+
+        d) We avoid generating excess mov statements in some cases.
+        
+        As a concrete example this source:
+        
+        if (!((x < q && y < q) || (t < q && z < q))) {
+            // ...
+        }
+        
+        Used to generate this bytecode:
+        
+        [  34] less              r1, r-15, r-19
+        [  38] jfalse            r1, 7(->45)
+        [  41] less              r1, r-16, r-19
+        [  45] jtrue             r1, 14(->59)
+        [  48] less              r1, r-17, r-19
+        [  52] jfalse            r1, 7(->59)
+        [  55] less              r1, r-18, r-19
+        [  59] jtrue             r1, 17(->76)
+        
+        And now generates this bytecode (also taking advantage of the second optimization below):
+        
+        [  34] jnless            r-15, r-19, 8(->42)
+        [  38] jless             r-16, r-19, 26(->64)
+        [  42] jnless            r-17, r-19, 8(->50)
+        [  46] jless             r-18, r-19, 18(->64)
+        
+        Note the jump fusion and the fact that there's less jump
+        indirection - three of the four jumps go straight to the target
+        clause instead of indirecting through another jump.
+        
+        2) Implement jless opcode to take advantage of the above, since we'll now often generate
+        a less followed by a jtrue where fusion is not forbidden.
+       
+        * parser/Nodes.h:
+        (JSC::ExpressionNode::hasConditionContextCodegen): Helper function to determine
+        whether a node supports special conditional codegen. Return false as this is the default.
+        (JSC::ExpressionNode::emitBytecodeInConditionContext): Assert not reached - only really
+        defined for nodes that do have conditional codegen.
+        (JSC::UnaryOpNode::expr): Add const version.
+        (JSC::LogicalNotNode::hasConditionContextCodegen): Returne true only if subexpression
+        supports it.
+        (JSC::LogicalOpNode::hasConditionContextCodegen): Return true.
+        * parser/Nodes.cpp:
+        (JSC::LogicalNotNode::emitBytecodeInConditionContext): Implemented - just swap
+        the true and false targets for the child node.
+        (JSC::LogicalOpNode::emitBytecodeInConditionContext): Implemented - handle jumps
+        directly, improving codegen quality. Also handles further nested conditional codegen.
+        (JSC::ConditionalNode::emitBytecode): Use condition context codegen when available.
+        (JSC::IfNode::emitBytecode): ditto
+        (JSC::IfElseNode::emitBytecode): ditto
+        (JSC::DoWhileNode::emitBytecode): ditto
+        (JSC::WhileNode::emitBytecode): ditto
+        (JSC::ForNode::emitBytecode): ditto
+
+        * bytecode/Opcode.h: 
+        - Added loop_if_false opcode - needed now that falsey jumps can be backwards.
+        - Added jless opcode to take advantage of new fusion opportunities.
+        * bytecode/CodeBlock.cpp:
+        (JSC::CodeBlock::dump): Handle above.
+        * bytecompiler/BytecodeGenerator.cpp:
+        (JSC::BytecodeGenerator::emitJumpIfTrue): Add peephole for less + jtrue ==> jless.
+        (JSC::BytecodeGenerator::emitJumpIfFalse): Add handling of backwrds falsey jumps.
+        * bytecompiler/BytecodeGenerator.h:
+        (JSC::BytecodeGenerator::emitNodeInConditionContext): Wrapper to handle tracking of
+        overly deep expressions etc.
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::privateExecute): Implement the two new opcodes (loop_if_false, jless).
+        * jit/JIT.cpp:
+        (JSC::JIT::privateCompileMainPass): Implement JIT support for the two new opcodes.
+        (JSC::JIT::privateCompileSlowCases): ditto
+        * jit/JIT.h:
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::emit_op_jless):
+        (JSC::JIT::emitSlow_op_jless): ditto
+        (JSC::JIT::emitBinaryDoubleOp): ditto
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emitSlow_op_loop_if_less): ditto
+        (JSC::JIT::emit_op_loop_if_false): ditto
+        (JSC::JIT::emitSlow_op_loop_if_false): ditto
+        * jit/JITStubs.cpp:
+        * jit/JITStubs.h:
+        (JSC::):
+
+2009-12-04  Kent Hansen  <kent.hansen@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        JavaScript delete operator should return false for string properties
+        https://bugs.webkit.org/show_bug.cgi?id=32012
+
+        * runtime/StringObject.cpp:
+        (JSC::StringObject::deleteProperty):
+
+2009-12-03  Drew Wilson  <atwilson@chromium.org>
+
+        Rolled back r51633 because it causes a perf regression in Chromium.
+
+        * wtf/Platform.h:
+
+2009-12-03  Gavin Barraclough  <barraclough@apple.com>
+
+        Try and fix the Windows build.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:  Export a symbol that should be exported.
+
+2009-12-03  Mark Rowe  <mrowe@apple.com>
+
+        Try and fix the Mac build.
+
+        * JavaScriptCore.exp:  Export a symbol that should be exported.
+
+2009-12-03  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        REGRESSION(4.0.3-48777): Crash in JSC::ExecState::propertyNames() (Debug-only?)
+        https://bugs.webkit.org/show_bug.cgi?id=32133
+
+        Work around odd GCC-ism and correct the scopechain for use by
+        calls made while a cachedcall is active on the callstack.
+
+        * interpreter/CachedCall.h:
+        (JSC::CachedCall::newCallFrame):
+        * runtime/JSArray.cpp:
+        (JSC::AVLTreeAbstractorForArrayCompare::compare_key_key):
+        * runtime/StringPrototype.cpp:
+        (JSC::stringProtoFuncReplace):
+
+2009-12-03  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver "Brraaaaiiiinnnnnzzzzzzzz" Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=32136
+        Add a rope representation to JSString.  Presently JSString always holds its data in UString form.
+        Instead, allow the result of a string concatenation to be represented in a tree form - with a
+        variable sized, reference-counted rope node retaining a set of UString::Reps (or other rope nopes).
+
+        Strings must still currently be resolved down to a flat UString representation before being used,
+        but by holding the string in a rope representation during construction we can avoid copying data
+        until we know the final size of the string.
+
+        ~2% progression on SunSpider (~25% on date-format-xparb, ~20% on string-validate-input).
+
+        * JavaScriptCore.exp:
+
+            - Update exports.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::privateExecute):
+
+            - Make use of new JSString::length() method to avoid prematurely resolving ropes.
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::privateCompileCTIMachineTrampolines):
+
+            - Switch the string length trampoline to read the length directly from JSString::m_length,
+              rather than from the JSString's UString::Rep's 'len' property.
+
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+
+            - Modify op_add such that addition of two strings, where either or both strings are already
+              in rope representation, produces a rope as a result.
+
+        * runtime/JSString.cpp:
+        (JSC::JSString::Rope::~Rope):
+        (JSC::copyChars):
+        (JSC::JSString::resolveRope):
+        (JSC::JSString::getPrimitiveNumber):
+        (JSC::JSString::toBoolean):
+        (JSC::JSString::toNumber):
+        (JSC::JSString::toString):
+        (JSC::JSString::toThisString):
+        (JSC::JSString::getStringPropertyDescriptor):
+        * runtime/JSString.h:
+        (JSC::JSString::Rope::Fiber::Fiber):
+        (JSC::JSString::Rope::Fiber::destroy):
+        (JSC::JSString::Rope::Fiber::isRope):
+        (JSC::JSString::Rope::Fiber::rope):
+        (JSC::JSString::Rope::Fiber::string):
+        (JSC::JSString::Rope::create):
+        (JSC::JSString::Rope::initializeFiber):
+        (JSC::JSString::Rope::ropeLength):
+        (JSC::JSString::Rope::stringLength):
+        (JSC::JSString::Rope::fibers):
+        (JSC::JSString::Rope::Rope):
+        (JSC::JSString::Rope::operator new):
+        (JSC::JSString::JSString):
+        (JSC::JSString::value):
+        (JSC::JSString::length):
+        (JSC::JSString::isRope):
+        (JSC::JSString::rope):
+        (JSC::JSString::string):
+        (JSC::JSString::canGetIndex):
+        (JSC::jsSingleCharacterSubstring):
+        (JSC::JSString::getIndex):
+        (JSC::jsSubstring):
+        (JSC::JSString::getStringPropertySlot):
+
+            - Add rope form.
+
+        * runtime/Operations.h:
+        (JSC::jsAdd):
+        (JSC::concatenateStrings):
+
+            - Update string concatenation, and addition of ropes, to produce ropes.
+
+        * runtime/StringObject.cpp:
+        (JSC::StringObject::getOwnPropertyNames):
+
+            - Make use of new JSString::length() method to avoid prematurely resolving ropes.
+
+2009-11-23  Jeremy Moskovich  <jeremy@chromium.org>
+
+        Reviewed by Eric Seidel.
+
+        Switch Chrome/Mac to use Core Text APIs rather than ATSUI APIs.
+        https://bugs.webkit.org/show_bug.cgi?id=31802
+
+        No test since this is already covered by existing pixel tests.
+
+        * wtf/Platform.h: #define USE_CORE_TEXT for Chrome/Mac.
+
+2009-12-02  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Add files missed in prior patch.
+
+        * runtime/JSZombie.cpp:
+        (JSC::):
+        (JSC::JSZombie::leakedZombieStructure):
+        * runtime/JSZombie.h: Added.
+        (JSC::JSZombie::JSZombie):
+        (JSC::JSZombie::isZombie):
+        (JSC::JSZombie::classInfo):
+        (JSC::JSZombie::isGetterSetter):
+        (JSC::JSZombie::isAPIValueWrapper):
+        (JSC::JSZombie::isPropertyNameIterator):
+        (JSC::JSZombie::getCallData):
+        (JSC::JSZombie::getConstructData):
+        (JSC::JSZombie::getUInt32):
+        (JSC::JSZombie::toPrimitive):
+        (JSC::JSZombie::getPrimitiveNumber):
+        (JSC::JSZombie::toBoolean):
+        (JSC::JSZombie::toNumber):
+        (JSC::JSZombie::toString):
+        (JSC::JSZombie::toObject):
+        (JSC::JSZombie::markChildren):
+        (JSC::JSZombie::put):
+        (JSC::JSZombie::deleteProperty):
+        (JSC::JSZombie::toThisObject):
+        (JSC::JSZombie::toThisString):
+        (JSC::JSZombie::toThisJSString):
+        (JSC::JSZombie::getJSNumber):
+        (JSC::JSZombie::getOwnPropertySlot):
+
+2009-12-02  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Add zombies to JSC
+        https://bugs.webkit.org/show_bug.cgi?id=32103
+
+        Add a compile time flag to make the JSC collector replace "unreachable"
+        objects with zombie objects.  The zombie object is a JSCell subclass that
+        ASSERTs on any attempt to use the JSCell methods.  In addition there are
+        a number of additional assertions in bottleneck code to catch zombie usage
+        as quickly as possible.
+
+        Grrr. Argh. Brains.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * interpreter/Register.h:
+        (JSC::Register::Register):
+        * runtime/ArgList.h:
+        (JSC::MarkedArgumentBuffer::append):
+        (JSC::ArgList::ArgList):
+        * runtime/Collector.cpp:
+        (JSC::Heap::destroy):
+        (JSC::Heap::sweep):
+        * runtime/Collector.h:
+        * runtime/JSCell.h:
+        (JSC::JSCell::isZombie):
+        (JSC::JSValue::isZombie):
+        * runtime/JSValue.h:
+        (JSC::JSValue::decode):
+        (JSC::JSValue::JSValue):
+        * wtf/Platform.h:
+
+2009-12-01  Jens Alfke  <snej@chromium.org>
+
+        Reviewed by Darin Adler.
+
+        Added variants of find/contains/add that allow a foreign key type to be used.
+        This will allow AtomicString-keyed maps to be queried by C string without
+        having to create a temporary AtomicString (see HTTPHeaderMap.)
+        The code for this is adapted from the equivalent in HashSet.h.
+
+        * wtf/HashMap.h:
+        (WTF::HashMap::find):
+        (WTF::HashMap::contains):
+        (WTF::HashMap::add):
+        * wtf/HashSet.h: Changed "method" to "function member" in a comment.
+
+2009-12-01  Gustavo Noronha Silva  <gustavo.noronha@collabora.co.uk>
+
+        Revert 51551 because it broke GTK+.
+
+        * wtf/Platform.h:
+
+2009-11-30  Gavin Barraclough  <barraclough@apple.com>
+
+        Windows Build fix.  Reviewed by NOBODY.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-11-24  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Geoff Garen.
+
+        Bug 31859 - Make world selection for JSC IsolatedWorlds automagical.
+
+        WebCore presently has to explicitly specify the world before entering into JSC,
+        which is a little fragile (particularly since property access via a
+        getter/setter might invoke execution). Instead derive the current world from
+        the lexical global object.
+        
+        Remove the temporary duct tape of willExecute/didExecute virtual hooks on the JSGlobalData::ClientData - these are no longer necessary.
+
+        * API/JSBase.cpp:
+        (JSEvaluateScript):
+        * API/JSObjectRef.cpp:
+        (JSObjectCallAsFunction):
+        * JavaScriptCore.exp:
+        * runtime/JSGlobalData.cpp:
+        * runtime/JSGlobalData.h:
+
+2009-11-30  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] Remove obsolete PLATFORM(KDE) code
+        https://bugs.webkit.org/show_bug.cgi?id=31958
+
+        KDE is now using unpatched QtWebKit.
+
+        * parser/Lexer.cpp: Remove obsolete KDE_USE_FINAL guard
+        * wtf/Platform.h: Remove PLATFORM(KDE) definition and code 
+        section that is guarded with it.
+
+2009-11-30  Jan-Arve Sæther  <jan-arve.saether@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Fix compilation with win32-icc
+
+        The Intel compiler does not support the __has_trivial_constructor type
+        trait.  The Intel Compiler can report itself as _MSC_VER >= 1400. The
+        reason for that is that the Intel Compiler depends on the Microsoft
+        Platform SDK, and in order to try to be "fully" MS compatible it will
+        "pretend" to be the same MS compiler as was shipped with the MS PSDK.
+        (Thus, compiling with win32-icc with VC8 SDK will make the source code
+        "think" the compiler at hand supports this type trait).
+
+        * wtf/TypeTraits.h:
+
+2009-11-29  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Eric Seidel.
+
+        [Qt] Mac build has JIT disabled
+        https://bugs.webkit.org/show_bug.cgi?id=31828
+
+        * wtf/Platform.h: Enable JIT for Qt Mac builds
+
+2009-11-28  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Eric Seidel.
+
+        Apply workaround for the limitation of VirtualFree with MEM_RELEASE to all ports running on Windows
+        https://bugs.webkit.org/show_bug.cgi?id=31943
+
+        * runtime/MarkStack.h:
+        (JSC::MarkStack::MarkStackArray::shrinkAllocation):
+
+2009-11-28  Zoltan Herczeg  <zherczeg@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31930
+
+        Seems a typo. We don't need ~270k memory to determine the vptrs.
+
+        * runtime/JSGlobalData.cpp:
+        (JSC::VPtrSet::VPtrSet):
+
+2009-11-27  Shinichiro Hamaji  <hamaji@chromium.org>
+
+        Unreviewed. 
+
+        Move GOwnPtr* from wtf to wtf/gtk
+        https://bugs.webkit.org/show_bug.cgi?id=31793
+
+        Build fix for chromium after r51423.
+        Exclude gtk directory from chromium build.
+
+        * JavaScriptCore.gyp/JavaScriptCore.gyp:
+
+2009-11-25  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Incorrect behaviour of jneq_null in the interpreter
+        https://bugs.webkit.org/show_bug.cgi?id=31901
+
+        Correct the logic of jneq_null.  This is already covered by existing tests.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::privateExecute):
+
+2009-11-26  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Oliver Hunt.
+
+        Move GOwnPtr* from wtf to wtf/gtk
+        https://bugs.webkit.org/show_bug.cgi?id=31793
+
+        * GNUmakefile.am: Change the path for GOwnPtr.*.
+        * JavaScriptCore.gyp/JavaScriptCore.gyp: Remove
+          GOwnPtr.cpp from the exclude list.
+        * JavaScriptCore.gypi: Change the path for GOwnPtr.*.
+        * wscript: Remove GOwnPtr.cpp from the exclude list.
+        * wtf/GOwnPtr.cpp: Removed.
+        * wtf/GOwnPtr.h: Removed.
+        * wtf/Threading.h: Change the path for GOwnPtr.h.
+        * wtf/gtk/GOwnPtr.cpp: Copied from JavaScriptCore/wtf/GOwnPtr.cpp.
+        * wtf/gtk/GOwnPtr.h: Copied from JavaScriptCore/wtf/GOwnPtr.h.
+        * wtf/unicode/glib/UnicodeGLib.h: Change the path for GOwnPtr.h.
+
+2009-11-24  Dmitry Titov  <dimich@chromium.org>
+
+        Reviewed by Eric Seidel.
+
+        Add ENABLE_SHARED_SCRIPT feature define and flag for build-webkit
+        https://bugs.webkit.org/show_bug.cgi?id=31444
+
+        * Configurations/FeatureDefines.xcconfig:
+        * wtf/Platform.h:
+
+2009-11-24  Chris Marrin  <cmarrin@apple.com>
+
+        Reviewed by Simon Fraser.
+
+        Add ability to enable ACCELERATED_COMPOSITING on Windows (currently disabled)
+        https://bugs.webkit.org/show_bug.cgi?id=27314
+
+        * wtf/Platform.h:
+
+2009-11-24  Jason Smith  <dark.panda@gmail.com>
+
+        Reviewed by Alexey Proskuryakov.
+
+        RegExp#exec's returned Array-like object behaves differently from
+        regular Arrays
+        https://bugs.webkit.org/show_bug.cgi?id=31689
+
+        * JavaScriptCore/runtime/RegExpConstructor.cpp: ensure that undefined
+        values are added to the returned RegExpMatchesArray
+
+2009-11-24  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Alexey Proskuryakov.
+
+        JSON.stringify performance on undefined is very poor
+        https://bugs.webkit.org/show_bug.cgi?id=31839
+
+        Switch from a UString to a Vector<UChar> when building
+        the JSON string, allowing us to safely remove the substr-copy
+        we otherwise did when unwinding an undefined property.
+
+        Also turns out to be a ~5% speedup on stringification.
+
+        * runtime/JSONObject.cpp:
+        (JSC::Stringifier::StringBuilder::append):
+        (JSC::Stringifier::stringify):
+        (JSC::Stringifier::Holder::appendNextProperty):
+
+2009-11-24  Mark Rowe  <mrowe@apple.com>
+
+        Fix production builds where the source tree may be read-only.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+
+2009-11-23  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        Include "config.h" to meet Coding Style Guidelines
+        https://bugs.webkit.org/show_bug.cgi?id=31792
+
+        * wtf/unicode/UTF8.cpp:
+        * wtf/unicode/glib/UnicodeGLib.cpp:
+        * wtf/unicode/wince/UnicodeWince.cpp:
+
+2009-11-23  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Streamlined some Math functions where we expect or know the result not
+        to be representable as an int.
+        
+        SunSpider says 0.6% faster.
+
+        * runtime/JSNumberCell.h:
+        (JSC::JSValue::JSValue):
+        * runtime/JSValue.h:
+        (JSC::JSValue::):
+        (JSC::jsDoubleNumber):
+        (JSC::JSValue::JSValue): Added a function for making a numeric JSValue
+        and skipping the "can I encode this as an int?" check, avoiding the
+        overhead of int <-> double roundtripping and double <-> double comparison
+        and branching.
+
+        * runtime/MathObject.cpp:
+        (JSC::mathProtoFuncACos):
+        (JSC::mathProtoFuncASin):
+        (JSC::mathProtoFuncATan):
+        (JSC::mathProtoFuncATan2):
+        (JSC::mathProtoFuncCos):
+        (JSC::mathProtoFuncExp):
+        (JSC::mathProtoFuncLog):
+        (JSC::mathProtoFuncRandom):
+        (JSC::mathProtoFuncSin):
+        (JSC::mathProtoFuncSqrt):
+        (JSC::mathProtoFuncTan): For these functions, which we expect or know
+        to produce results not representable as ints, call jsDoubleNumber instead
+        of jsNumber.
+
+2009-11-23  Mark Rowe  <mrowe@apple.com>
+
+        Unreviewed. Unbreak the regression tests after r51329.
+
+        * API/JSBase.cpp:
+        (JSEvaluateScript): Null-check clientData before dereferencing it.
+        * API/JSObjectRef.cpp:
+        (JSObjectCallAsFunction): Ditto.
+
+2009-11-23  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Geoff Garen.
+
+        Part 1/3 of <rdar://problem/7377477> REGRESSION: Many web pages fail to render after interesting script runs in isolated world
+
+        Some clients of the JavaScriptCore API expect to be able to make callbacks over the JSC API,
+        and for this to automagically cause execution to take place in the world associated with the
+        global object associated with the ExecState (JSContextRef) passed.  However this is not how
+        things work - the world must be explicitly set within WebCore.
+
+        Making this work just for API calls to evaluate & call will be a far from perfect solution,
+        since direct (non-API) use of JSC still relies on WebCore setting the current world correctly.
+        A better solution would be to make this all work automagically all throughout WebCore, but this
+        will require more refactoring.
+
+        Since the API is in JSC but worlds only exist in WebCore, add callbacks on the JSGlobalData::ClientData
+        to allow it to update the current world on entry/exit via the JSC API.  This is temporary duck
+        tape, and should be removed once the current world no longer needs to be explicitly tracked.
+
+        * API/JSBase.cpp:
+        (JSEvaluateScript):
+        * API/JSObjectRef.cpp:
+        (JSObjectCallAsFunction):
+        * JavaScriptCore.exp:
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::ClientData::beginningExecution):
+        (JSC::JSGlobalData::ClientData::completedExecution):
+        * runtime/JSGlobalData.h:
+
+2009-11-23  Steve Block  <steveblock@google.com>
+
+        Reviewed by Dmitry Titov.
+
+        Adds MainThreadAndroid.cpp with Android-specific WTF threading functions.
+        https://bugs.webkit.org/show_bug.cgi?id=31807
+
+        * wtf/android: Added.
+        * wtf/android/MainThreadAndroid.cpp: Added.
+        (WTF::timeoutFired):
+        (WTF::initializeMainThreadPlatform):
+        (WTF::scheduleDispatchFunctionsOnMainThread):
+
+2009-11-23  Alexey Proskuryakov  <ap@apple.com>
+
+        Reviewed by Brady Eidson.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31748
+        Make WebSocketHandleCFNet respect proxy auto-configuration files via CFProxySupport
+
+        * JavaScriptCore.exp: Export callOnMainThreadAndWait.
+
+2009-11-23  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Symbian] Fix lastIndexOf() for Symbian
+        https://bugs.webkit.org/show_bug.cgi?id=31773
+
+        Symbian soft floating point library has problems with operators
+        comparing NaN to numbers. Without a workaround lastIndexOf() 
+        function does not work.
+
+        Patch developed by David Leong.
+
+        * runtime/StringPrototype.cpp:
+        (JSC::stringProtoFuncLastIndexOf):Add an extra test 
+        to check for NaN for Symbian.
+
+2009-11-23  Steve Block  <steveblock@google.com>
+
+        Reviewed by Eric Seidel.
+
+        Android port lacks implementation of atomicIncrement and atomicDecrement.
+        https://bugs.webkit.org/show_bug.cgi?id=31715
+
+        * wtf/Threading.h: Modified.
+        (WTF::atomicIncrement): Added Android implementation.
+        (WTF::atomicDecrement): Added Android implementation.
+
+2009-11-22  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Unreviewed.
+
+        [Qt] Sort source lists and remove obsolete comments 
+        from the build system.
+
+        * JavaScriptCore.pri:
+
+2009-11-21  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Eric Seidel.
+
+        [Qt][Mac] Turn on multiple JavaScript threads for QtWebkit on Mac
+        https://bugs.webkit.org/show_bug.cgi?id=31753
+
+        * wtf/Platform.h:
+
+2009-11-19  Steve Block  <steveblock@google.com>
+
+        Android port lacks configuration in Platform.h and config.h.
+        https://bugs.webkit.org/show_bug.cgi?id=31671
+
+        * wtf/Platform.h: Modified. Added Android-specific configuration.
+
+2009-11-19  Alexey Proskuryakov  <ap@apple.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31690
+        Make SocketStreamHandleCFNet work on Windows
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * wtf/MainThread.cpp:
+        (WTF::FunctionWithContext::FunctionWithContext):
+        (WTF::dispatchFunctionsFromMainThread):
+        (WTF::callOnMainThreadAndWait):
+        * wtf/MainThread.h:
+        Re-add callOnMainThreadAndWait(), which was removed in bug 23926.
+
+2009-11-19  Dmitry Titov  <dimich@chromium.org>
+
+        Reviewed by David Levin.
+
+        isMainThread() on Chromium (Mac and Linux) is so slow it timeouts LayoutTests..
+        https://bugs.webkit.org/show_bug.cgi?id=31693
+
+        * wtf/ThreadingPthreads.cpp:
+        (WTF::initializeThreading): grab and use the pthread_t of the main thread instead of ThreadIdentifier.
+        (WTF::isMainThread): Ditto.
+
+2009-11-19  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        Remove HAVE(STRING_H) guard from JavaScriptCore
+        https://bugs.webkit.org/show_bug.cgi?id=31668
+
+        * config.h:
+        * runtime/UString.cpp:
+
+2009-11-19  Dumitru Daniliuc  <dumi@chromium.org>
+
+        Reviewed by Dmitry Titov.
+
+        Fixing a bug in MessageQueue::removeIf() that leads to an
+        assertion failure.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31657
+
+        * wtf/MessageQueue.h:
+        (WTF::MessageQueue::removeIf):
+
+2009-11-19  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        Remove HAVE(FLOAT_H) guard
+        https://bugs.webkit.org/show_bug.cgi?id=31661
+
+        JavaScriptCore has a dependency on float.h, there is
+        no need to guard float.h.
+
+        * runtime/DatePrototype.cpp: Remove include directive 
+        for float.h as it is included in MathExtras.h already.
+        * runtime/Operations.cpp: Ditto.
+        * runtime/UString.cpp: Ditto.
+        * wtf/dtoa.cpp: Ditto.
+        * wtf/MathExtras.h: Remove HAVE(FLOAT_H) guard.
+        * wtf/Platform.h: Ditto.
+
+2009-11-19  Thiago Macieira <thiago.macieira@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        Build fix for 32-bit Sparc machines: these machines are big-endian.
+
+        * wtf/Platform.h:
+
+2009-11-18  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] Remove support for Qt v4.3 or older versions
+        https://bugs.webkit.org/show_bug.cgi?id=29469
+
+        * JavaScriptCore.pro:
+        * jsc.pro:
+        * wtf/unicode/qt4/UnicodeQt4.h:
+
+2009-11-18  Kent Tamura  <tkent@chromium.org>
+
+        Reviewed by Darin Adler.
+
+        Move UString::from(double) implementation to new
+        WTF::doubleToStringInJavaScriptFormat(), and expose it because WebCore
+        code will use it.
+        https://bugs.webkit.org/show_bug.cgi?id=31330
+
+        - Introduce new function createRep(const char*, unsigned) and
+          UString::UString(const char*, unsigned) to reduce 2 calls to strlen().
+        - Fix a bug that dtoa() doesn't update *rve if the input value is NaN
+          or Infinity.
+
+        No new tests because this doesn't change the behavior.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * runtime/UString.cpp:
+        (JSC::createRep):
+        (JSC::UString::UString):
+        (JSC::UString::from): Move the code to doubleToStringInJavaScriptFormat().
+        * runtime/UString.h:
+        * wtf/dtoa.cpp:
+        (WTF::dtoa): Fix a bug about rve.
+        (WTF::append): A helper for doubleToStringInJavaScriptFormat().
+        (WTF::doubleToStringInJavaScriptFormat): Move the code from UString::from(double).
+        * wtf/dtoa.h:
+
+2009-11-18  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] Remove WTF_USE_JAVASCRIPTCORE_BINDINGS as it is no longer used
+        https://bugs.webkit.org/show_bug.cgi?id=31643
+
+        * JavaScriptCore.pro:
+
+2009-11-18  Nate Chapin  <japhet@chromium.org>
+
+        Reviewed by Darin Fisher.
+
+        Remove Chromium's unnecessary dependency on wtf's tcmalloc files.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31648
+
+        * JavaScriptCore.gyp/JavaScriptCore.gyp:
+
+2009-11-18  Thiago Macieira <thiago.macieira@nokia.com>
+
+        Reviewed by Gavin Barraclough.
+
+        [Qt] Implement symbol hiding for JSC's JIT functions.
+
+        These functions are implemented directly in assembly, so they need the
+        proper directives to enable/disable visibility. On ELF systems, it's
+        .hidden, whereas on Mach-O systems (Mac) it's .private_extern. On
+        Windows, it's not necessary since you have to explicitly export. I
+        also implemented the AIX idiom, though it's unlikely anyone will
+        implement AIX/POWER JIT.
+        https://bugs.webkit.org/show_bug.cgi?id=30864
+
+        * jit/JITStubs.cpp:
+
+2009-11-18  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Alexey Proskuryakov.
+
+        Interpreter may do an out of range access when throwing an exception in the profiler.
+        https://bugs.webkit.org/show_bug.cgi?id=31635
+
+        Add bounds check.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::throwException):
+
+2009-11-18  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Darin Adler.
+
+        Fix the clobber list of cacheFlush for ARM and Thumb2 on Linux
+        https://bugs.webkit.org/show_bug.cgi?id=31631
+
+        * jit/ExecutableAllocator.h:
+        (JSC::ExecutableAllocator::cacheFlush):
+
+2009-11-18  Harald Fernengel  <harald.fernengel@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Fix detection of linux-g++
+
+        Never use "linux-g++*" to check for linux-g++, since this will break embedded
+        builds which use linux-arm-g++ and friends. Use 'linux*-g++*' to check for any
+        g++ on linux mkspec.
+
+        * JavaScriptCore.pri:
+
+2009-11-17  Jon Honeycutt  <jhoneycutt@apple.com>
+
+        Add JSContextRefPrivate.h to list of copied files.
+
+        Reviewed by Mark Rowe.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreGenerated.make:
+
+2009-11-17  Martin Robinson  <martin.james.robinson@gmail.com>
+
+        Reviewed by Adam Barth.
+
+        [GTK] Style cleanup for GOwnPtr
+        https://bugs.webkit.org/show_bug.cgi?id=31506
+
+        Remove forward declaration in GOwnPtr and do some style cleanup.
+
+        * wtf/GOwnPtr.cpp:
+        * wtf/GOwnPtr.h:
+        (WTF::GOwnPtr::GOwnPtr):
+        (WTF::GOwnPtr::~GOwnPtr):
+        (WTF::GOwnPtr::get):
+        (WTF::GOwnPtr::release):
+        (WTF::GOwnPtr::outPtr):
+        (WTF::GOwnPtr::set):
+        (WTF::GOwnPtr::clear):
+        (WTF::GOwnPtr::operator*):
+        (WTF::GOwnPtr::operator->):
+        (WTF::GOwnPtr::operator!):
+        (WTF::GOwnPtr::operator UnspecifiedBoolType):
+        (WTF::GOwnPtr::swap):
+        (WTF::swap):
+        (WTF::operator==):
+        (WTF::operator!=):
+        (WTF::getPtr):
+        (WTF::freeOwnedGPtr):
+
+2009-11-17  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        Incorrect use of JavaScriptCore API in DumpRenderTree
+        https://bugs.webkit.org/show_bug.cgi?id=31577
+
+        Add assertions to the 'toJS' functions to catch mistakes like
+        this early.  Restructure existing code which blindly passed potentially
+        null values to toJS when forwarding exceptions so that a null check is
+        performed first.
+
+        * API/APICast.h:
+        (toJS):
+        (toJSForGC):
+        * API/JSCallbackObjectFunctions.h:
+        (JSC::::getOwnPropertySlot):
+        (JSC::::put):
+        (JSC::::deleteProperty):
+        (JSC::::construct):
+        (JSC::::hasInstance):
+        (JSC::::call):
+        (JSC::::toNumber):
+        (JSC::::toString):
+        (JSC::::staticValueGetter):
+        (JSC::::callbackGetter):
+        * API/tests/testapi.c: Fix errors in the API tester.
+        (MyObject_getProperty):
+        (MyObject_convertToType):
+        (EvilExceptionObject_convertToType):
+
+2009-11-16  Zoltan Herczeg  <zherczeg@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31050
+
+        Minor fixes for JSVALUE32_64: branchConvertDoubleToInt32
+        failed on a CortexA8 CPU, but not on a simulator; and
+        JITCall.cpp modifications was somehow not committed to mainline.
+
+        * assembler/ARMAssembler.h:
+        (JSC::ARMAssembler::fmrs_r):
+        * assembler/MacroAssemblerARM.h:
+        (JSC::MacroAssemblerARM::branchConvertDoubleToInt32):
+        * jit/JITCall.cpp:
+        (JSC::JIT::compileOpCall):
+
+2009-11-16  Joerg Bornemann  <joerg.bornemann@trolltech.com>
+
+        Reviewed by Simon Hausmann.
+
+        Fix Qt build on Windows CE 6.
+
+        * JavaScriptCore.pri: Add missing include path.
+        * wtf/Platform.h: Include ce_time.h for Windows CE 6.
+
+2009-11-13  Zoltan Herczeg  <zherczeg@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31050
+
+        Adding optimization support for mode JSVALUE32_64
+        on ARM systems.
+
+        * jit/JIT.h:
+        * jit/JITCall.cpp:
+        (JSC::JIT::compileOpCall):
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::emit_op_method_check):
+        (JSC::JIT::compileGetByIdHotPath):
+        (JSC::JIT::compileGetByIdSlowCase):
+        (JSC::JIT::emit_op_put_by_id):
+
+2009-11-14  Zoltan Herczeg  <zherczeg@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31050
+
+        Adding JSVALUE32_64 support for ARM (but not turning it
+        on by default). All optimizations must be disabled, since
+        this patch is only the first of a series of patches.
+
+        During the work, a lot of x86 specific code revealed and
+        made platform independent.
+        See revisions: 50531 50541 50593 50594 50595
+
+        * assembler/ARMAssembler.h:
+        (JSC::ARMAssembler::):
+        (JSC::ARMAssembler::fdivd_r):
+        * assembler/MacroAssemblerARM.h:
+        (JSC::MacroAssemblerARM::lshift32):
+        (JSC::MacroAssemblerARM::neg32):
+        (JSC::MacroAssemblerARM::rshift32):
+        (JSC::MacroAssemblerARM::branchOr32):
+        (JSC::MacroAssemblerARM::set8):
+        (JSC::MacroAssemblerARM::setTest8):
+        (JSC::MacroAssemblerARM::loadDouble):
+        (JSC::MacroAssemblerARM::divDouble):
+        (JSC::MacroAssemblerARM::convertInt32ToDouble):
+        (JSC::MacroAssemblerARM::zeroDouble):
+        * jit/JIT.cpp:
+        * jit/JIT.h:
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::privateCompileCTIMachineTrampolines):
+        * jit/JITStubs.cpp:
+        * wtf/StdLibExtras.h:
+
+2009-11-13  Dominik Röttsches  <dominik.roettsches@access-company.com>
+
+        Reviewed by Eric Seidel.
+
+        Unify TextBoundaries implementations by only relying on WTF Unicode abstractions
+        https://bugs.webkit.org/show_bug.cgi?id=31468
+
+        Adding isAlphanumeric abstraction, required
+        by TextBoundaries.cpp.
+
+        * wtf/unicode/glib/UnicodeGLib.h:
+        (WTF::Unicode::isAlphanumeric):
+        * wtf/unicode/icu/UnicodeIcu.h:
+        (WTF::Unicode::isAlphanumeric):
+
+2009-11-13  Norbert Leser  <norbert.leser&nokia.com>
+
+        Reviewed by Eric Seidel.
+
+        Added macros for USERINCLUDE paths within symbian blocks
+        to guarantee inclusion of respective header files from local path
+        first (to avoid clashes with same names of header files in system include path).
+
+        * JavaScriptCore.pri:
+
+2009-11-13  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Geoff Garen.
+
+        JSValueProtect and JSValueUnprotect don't protect API wrapper values
+        https://bugs.webkit.org/show_bug.cgi?id=31485
+
+        Make JSValueProtect/Unprotect use a new 'toJS' function, 'toJSForGC' that
+        does not attempt to to strip out API wrapper objects.
+
+        * API/APICast.h:
+        (toJSForGC):
+        * API/JSValueRef.cpp:
+        (JSValueProtect):
+        (JSValueUnprotect):
+        * API/tests/testapi.c:
+        (makeGlobalNumberValue):
+        (main):
+
+2009-11-13  İsmail Dönmez  <ismail@namtrac.org>
+
+        Reviewed by Antti Koivisto.
+
+        Fix typo, ce_time.cpp should be ce_time.c
+
+        * JavaScriptCore.pri:
+
+2009-11-12  Steve VanDeBogart  <vandebo@chromium.org>
+
+        Reviewed by Adam Barth.
+
+        Calculate the time offset only if we were able to parse
+        the date string. This saves an IPC in Chromium for
+        invalid date strings.
+        https://bugs.webkit.org/show_bug.cgi?id=31416
+
+        * wtf/DateMath.cpp:
+        (WTF::parseDateFromNullTerminatedCharacters):
+        (JSC::parseDateFromNullTerminatedCharacters):
+
+2009-11-12  Oliver Hunt  <oliver@apple.com>
+
+        Rollout r50896 until i can work out why it causes failures.
+
+        * bytecompiler/BytecodeGenerator.cpp:
+        (JSC::BytecodeGenerator::emitReturn):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::execute):
+        * parser/Nodes.cpp:
+        (JSC::EvalNode::emitBytecode):
+
+2009-11-12  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Stephanie Lewis.
+
+        Remove LIBRARY directive from def file to fix Debug_All target.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-11-12  Gustavo Noronha Silva  <gustavo.noronha@collabora.co.uk>
+
+        Rubber-stamped by Holger Freyther.
+
+        Revert r50204, since it makes DRT crash on 32 bits release builds
+        for GTK+.
+
+        * wtf/FastMalloc.h:
+
+2009-11-12  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Start unifying entry logic for function and eval code.
+
+        Eval now uses a ret instruction to end execution, and sets up
+        a callframe more in line with what we do for function entry.
+
+        * bytecompiler/BytecodeGenerator.cpp:
+        (JSC::BytecodeGenerator::emitReturn):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::execute):
+        * parser/Nodes.cpp:
+        (JSC::EvalNode::emitBytecode):
+
+2009-11-12  Richard Moe Gustavsen  <richard.gustavsen@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] Disable pthread_setname_np.
+
+        This allows Qt builds on Mac from 10.6 to run on earlier version
+        where this symbol is not present.
+        https://bugs.webkit.org/show_bug.cgi?id=31403
+
+        * wtf/Platform.h:
+
+2009-11-12  Thiago Macieira <thiago.macieira@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] Fix linking on Linux 32-bit.
+
+        It was missing the ".text" directive at the top of the file,
+        indicating that code would follow. Without it, the assembler created
+        "NOTYPE" symbols, which would result in linker errors.
+        https://bugs.webkit.org/show_bug.cgi?id=30863
+
+        * jit/JITStubs.cpp:
+
+2009-11-11  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Alexey Proskuryakov.
+
+        Refactor multiple JavaScriptCore threads
+        https://bugs.webkit.org/show_bug.cgi?id=31328
+
+        Remove the id field from the PlatformThread structure 
+        as it is not used.
+
+        * runtime/Collector.cpp:
+        (JSC::getCurrentPlatformThread):
+        (JSC::suspendThread):
+        (JSC::resumeThread):
+        (JSC::getPlatformThreadRegisters):
+
+2009-11-10  Geoffrey Garen  <ggaren@apple.com>
+
+        Linux build fix: Added an #include for UINT_MAX.
+
+        * runtime/WeakRandom.h:
+
+2009-11-10  Geoffrey Garen  <ggaren@apple.com>
+
+        JavaScriptGlue build fix: Marked a file 'private' instead of 'project'.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+
+2009-11-10  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Gavin "avGni arBalroguch" Barraclough.
+
+        Faster Math.random, based on GameRand.
+        
+        SunSpider says 1.4% faster.
+
+        * GNUmakefile.am:
+        * JavaScriptCore.gypi:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
+        * JavaScriptCore.xcodeproj/project.pbxproj: Added the header to the project.
+
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::JSGlobalData):
+        * runtime/JSGlobalData.h: Use an object to track random number generation
+        state, initialized to the current time.
+
+        * runtime/MathObject.cpp:
+        (JSC::MathObject::MathObject):
+        (JSC::mathProtoFuncRandom): Use the new hotness.
+
+        * runtime/WeakRandom.h: Added.
+        (JSC::WeakRandom::WeakRandom):
+        (JSC::WeakRandom::get):
+        (JSC::WeakRandom::advance): The new hotness.
+
+2009-11-09  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Imported the v8 DST cache.
+        
+        SunSpider says 1.5% faster.
+
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::resetDateCache): Reset the DST cache when resetting
+        other date data.
+
+        * runtime/JSGlobalData.h:
+        (JSC::DSTOffsetCache::DSTOffsetCache):
+        (JSC::DSTOffsetCache::reset): Added a struct for the DST cache.
+
+        * wtf/DateMath.cpp:
+        (WTF::calculateDSTOffsetSimple):
+        (WTF::calculateDSTOffset):
+        (WTF::parseDateFromNullTerminatedCharacters):
+        (JSC::getDSTOffset):
+        (JSC::gregorianDateTimeToMS):
+        (JSC::msToGregorianDateTime):
+        (JSC::parseDateFromNullTerminatedCharacters):
+        * wtf/DateMath.h: The imported code for probing and updating the cache.
+
+2009-11-09  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Fixed an edge case that could cause the engine not to notice a timezone
+        change.
+        
+        No test because this case would require manual intervention to change
+        the timezone during the test.
+        
+        SunSpider reports no change.
+
+        * runtime/DateInstanceCache.h:
+        (JSC::DateInstanceCache::DateInstanceCache):
+        (JSC::DateInstanceCache::reset): Added a helper function for resetting
+        this cache. Also, shrank the cache, since we'll be resetting it often.
+
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::resetDateCache): Include resetting the DateInstanceCache
+        in resetting Date data. (Otherwise, a cache hit could bypass a necessary
+        timezone update check.)
+
+2009-11-09  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Some manual inlining and constant propogation in Date code.
+        
+        SunSpider reports a 0.4% speedup on date-*, no overall speedup. Shark
+        says some previously evident stalls are now gone.
+
+        * runtime/DateConstructor.cpp:
+        (JSC::callDate):
+        * runtime/DateConversion.cpp:
+        (JSC::formatTime):
+        (JSC::formatTimeUTC): Split formatTime into UTC and non-UTC variants.
+
+        * runtime/DateConversion.h:
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::calculateGregorianDateTime):
+        (JSC::DateInstance::calculateGregorianDateTimeUTC):
+        * runtime/DateInstance.h:
+        (JSC::DateInstance::gregorianDateTime):
+        (JSC::DateInstance::gregorianDateTimeUTC): Split gregorianDateTime into
+        a UTC and non-UTC variant, and split each variant into a fast inline
+        case and a slow out-of-line case.
+
+        * runtime/DatePrototype.cpp:
+        (JSC::formatLocaleDate):
+        (JSC::dateProtoFuncToString):
+        (JSC::dateProtoFuncToUTCString):
+        (JSC::dateProtoFuncToISOString):
+        (JSC::dateProtoFuncToDateString):
+        (JSC::dateProtoFuncToTimeString):
+        (JSC::dateProtoFuncGetFullYear):
+        (JSC::dateProtoFuncGetUTCFullYear):
+        (JSC::dateProtoFuncToGMTString):
+        (JSC::dateProtoFuncGetMonth):
+        (JSC::dateProtoFuncGetUTCMonth):
+        (JSC::dateProtoFuncGetDate):
+        (JSC::dateProtoFuncGetUTCDate):
+        (JSC::dateProtoFuncGetDay):
+        (JSC::dateProtoFuncGetUTCDay):
+        (JSC::dateProtoFuncGetHours):
+        (JSC::dateProtoFuncGetUTCHours):
+        (JSC::dateProtoFuncGetMinutes):
+        (JSC::dateProtoFuncGetUTCMinutes):
+        (JSC::dateProtoFuncGetSeconds):
+        (JSC::dateProtoFuncGetUTCSeconds):
+        (JSC::dateProtoFuncGetTimezoneOffset):
+        (JSC::setNewValueFromTimeArgs):
+        (JSC::setNewValueFromDateArgs):
+        (JSC::dateProtoFuncSetYear):
+        (JSC::dateProtoFuncGetYear): Updated for the gregorianDateTime change above.
+
+2009-11-09  Geoffrey Garen  <ggaren@apple.com>
+
+        Build fix: export a new symbol.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-11-09  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam "Home Wrecker" Weinig.
+
+        Added a tiny cache for Date parsing.
+        
+        SunSpider says 1.2% faster.
+
+        * runtime/DateConversion.cpp:
+        (JSC::parseDate): Try to reuse the last parsed Date, if present.
+
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::resetDateCache):
+        * runtime/JSGlobalData.h: Added storage for last parsed Date. Refactored
+        this code to make resetting the date cache easier.
+
+        * runtime/JSGlobalObject.h:
+        (JSC::DynamicGlobalObjectScope::DynamicGlobalObjectScope): Updated for
+        refactoring.
+
+        * wtf/DateMath.cpp:
+        (JSC::parseDateFromNullTerminatedCharacters):
+        * wtf/DateMath.h: Changed ExecState to be first parameter, as is the JSC custom.
+
+2009-11-09  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Can cache prototype lookups on uncacheable dictionaries.
+        https://bugs.webkit.org/show_bug.cgi?id=31198
+
+        Replace fromDictionaryTransition with flattenDictionaryObject and
+        flattenDictionaryStructure.  This change is necessary as we need to
+        guarantee that our attempt to convert away from a dictionary structure
+        will definitely succeed, and in some cases this requires mutating the
+        object storage itself.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::tryCacheGetByID):
+        * jit/JITStubs.cpp:
+        (JSC::JITThunks::tryCacheGetByID):
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/BatchedTransitionOptimizer.h:
+        (JSC::BatchedTransitionOptimizer::~BatchedTransitionOptimizer):
+        * runtime/JSObject.h:
+        (JSC::JSObject::flattenDictionaryObject):
+        * runtime/Operations.h:
+        (JSC::normalizePrototypeChain):
+        * runtime/Structure.cpp:
+        (JSC::Structure::flattenDictionaryStructure):
+        (JSC::comparePropertyMapEntryIndices):
+        * runtime/Structure.h:
+
+2009-11-09  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Not reviewed, build fix.
+
+        Remove extra character from r50701.
+
+        * JavaScriptCore.pri:
+
+2009-11-09  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Not reviewed, build fix.
+
+        Revert r50695 because it broke QtWebKit (clean builds).
+
+        * JavaScriptCore.pri:
+
+2009-11-09  Norbert Leser  <norbert.leser@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        Prepended $$PWD to GENERATED_SOURCES_DIR to avoid potential ambiguities when included from WebCore.pro.
+        Some preprocessors consider this GENERATED_SOURCES_DIR relative to current invoking dir (e.g., ./WebCore),
+        and not the working dir of JavaCriptCore.pri (i.e., ../JavaScriptCore/).
+
+        * JavaScriptCore.pri:
+
+2009-11-09  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        Use explicit parentheses to silence gcc 4.4 -Wparentheses warnings
+        https://bugs.webkit.org/show_bug.cgi?id=31040
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::privateExecute):
+
+2009-11-08  David Levin  <levin@chromium.org>
+
+        Reviewed by NOBODY (speculative snow leopard and windows build fixes).
+
+        * wtf/DateMath.cpp:
+        (WTF::parseDateFromNullTerminatedCharacters):
+        (JSC::gregorianDateTimeToMS):
+        (JSC::msToGregorianDateTime):
+        (JSC::parseDateFromNullTerminatedCharacters):
+        * wtf/DateMath.h:
+        (JSC::GregorianDateTime::GregorianDateTime):
+
+2009-11-08  David Levin  <levin@chromium.org>
+
+        Reviewed by NOBODY (chromium build fix).
+        
+        Hopefully, the last build fix.
+
+        Create better separation in DateMath about the JSC
+        and non-JSC portions. Also, only expose the non-JSC
+        version in the exports.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * wtf/DateMath.cpp:
+        (WTF::parseDateFromNullTerminatedCharacters):
+        (JSC::getUTCOffset):
+        (JSC::gregorianDateTimeToMS):
+        (JSC::msToGregorianDateTime):
+        (JSC::parseDateFromNullTerminatedCharacters):
+        * wtf/DateMath.h:
+        (JSC::gmtoffset):
+
+2009-11-08  David Levin  <levin@chromium.org>
+
+        Reviewed by NOBODY (chromium build fix).
+
+        For the change in DateMath.
+
+        * config.h:
+        * wtf/DateMath.cpp:
+
+2009-11-06  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: export some symbols.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-11-06  Geoffrey Garen  <ggaren@apple.com>
+
+        Build fix: updated export file.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+
+2009-11-06  Geoffrey Garen  <ggaren@apple.com>
+
+        Build fix: added some #includes.
+
+        * wtf/CurrentTime.h:
+        * wtf/DateMath.h:
+
+2009-11-06  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+        
+        https://bugs.webkit.org/show_bug.cgi?id=31197
+        Implemented a timezone cache not based on Mac OS X's notify_check API.
+        
+        If the VM calculates the local timezone offset from UTC, it caches the
+        result until the end of the current VM invocation. (We don't want to cache
+        forever, because the user's timezone may change over time.)
+        
+        This removes notify_* overhead on Mac, and, more significantly, removes
+        OS time and date call overhead on non-Mac platforms.
+
+        ~8% speedup on Date microbenchmark on Mac. SunSpider reports maybe a tiny
+        speedup on Mac. (Speedup on non-Mac platforms should be even more noticeable.)
+
+        * JavaScriptCore.exp:
+
+        * interpreter/CachedCall.h:
+        (JSC::CachedCall::CachedCall):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::execute):
+        * runtime/JSGlobalObject.h:
+        (JSC::DynamicGlobalObjectScope::DynamicGlobalObjectScope): Made the 
+        DynamicGlobalObjectScope constructor responsible for checking whether a
+        dynamicGlobalObject has already been set. This eliminated some duplicate
+        client code, and allowed me to avoid adding even more duplicate client
+        code. Made DynamicGlobalObjectScope responsible for resetting the
+        local timezone cache upon first entry to the VM.
+
+        * runtime/DateConstructor.cpp:
+        (JSC::constructDate):
+        (JSC::callDate):
+        (JSC::dateParse):
+        (JSC::dateUTC):
+        * runtime/DateConversion.cpp:
+        (JSC::parseDate):
+        * runtime/DateConversion.h:
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::gregorianDateTime):
+        * runtime/DateInstance.h:
+        * runtime/DateInstanceCache.h:
+        * runtime/DatePrototype.cpp:
+        (JSC::setNewValueFromTimeArgs):
+        (JSC::setNewValueFromDateArgs):
+        (JSC::dateProtoFuncSetYear):
+        * runtime/InitializeThreading.cpp:
+        (JSC::initializeThreadingOnce):
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::JSGlobalData):
+        * runtime/JSGlobalData.h:
+        * wtf/DateMath.cpp:
+        (WTF::getCurrentUTCTime):
+        (WTF::getCurrentUTCTimeWithMicroseconds):
+        (WTF::getLocalTime):
+        (JSC::getUTCOffset): Use the new cache. Also, see below.
+        (JSC::gregorianDateTimeToMS):
+        (JSC::msToGregorianDateTime):
+        (JSC::initializeDates):
+        (JSC::parseDateFromNullTerminatedCharacters): Simplified the way this function
+        accounts for the local timezone offset, to accomodate our new caching API,
+        and a (possibly misguided) caller in WebCore. Also, see below.
+        * wtf/DateMath.h:
+        (JSC::GregorianDateTime::GregorianDateTime): Moved most of the code in
+        DateMath.* into the JSC namespace. The code needed to move so it could
+        naturally interact with ExecState and JSGlobalData to support caching.
+        Logically, it seemed right to move it, too, since this code is not really
+        as low-level as the WTF namespace might imply -- it implements a set of
+        date parsing and conversion quirks that are finely tuned to the JavaScript
+        language. Also removed the Mac OS X notify_* infrastructure.
+        
+        * wtf/CurrentTime.h:
+        (WTF::currentTimeMS):
+        (WTF::getLocalTime): Moved the rest of the DateMath code here, and renamed
+        it to make it consistent with WTF's currentTime function.
+
+2009-11-06  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Unreviewed trivial buildfix after r50595.
+
+        Rename the remaining rshiftPtr calls to rshift32
+
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::emit_op_rshift):
+        * jit/JITInlineMethods.h:
+        (JSC::JIT::emitFastArithImmToInt):
+
+2009-11-06  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Tidy up the shift methods on the macro-assembler interface.
+
+        Currently behaviour of shifts of a magnitude > 0x1f is undefined.
+        Instead defined that all shifts are masked to this range.  This makes a lot of
+        practical sense, both since having undefined behaviour is not particularly
+        desirable, and because this behaviour is commonly required (particularly since
+        it is required bt ECMA-262 for shifts).
+
+        Update the ARM assemblers to provide this behaviour.  Remove (now) redundant
+        masks from JITArithmetic, and remove rshiftPtr (this was used in case that
+        could be rewritten in a simpler form using rshift32, only optimized JSVALUE32
+        on x86-64, which uses JSVALUE64!)
+
+        * assembler/MacroAssembler.h:
+        * assembler/MacroAssemblerARM.h:
+        (JSC::MacroAssemblerARM::lshift32):
+        (JSC::MacroAssemblerARM::rshift32):
+        * assembler/MacroAssemblerARMv7.h:
+        (JSC::MacroAssemblerARMv7::lshift32):
+        (JSC::MacroAssemblerARMv7::rshift32):
+        * assembler/MacroAssemblerX86_64.h:
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::emit_op_lshift):
+        (JSC::JIT::emit_op_rshift):
+
+2009-11-05  Gavin Barraclough  <barraclough@apple.com>
+
+        Rubber Stamped by Oliver Hunt.
+
+        Remove a magic number (1) from the JIT, instead compute the value with OBJECT_OFFSET.
+
+        * jit/JITInlineMethods.h:
+        (JSC::JIT::emitPutJITStubArg):
+        (JSC::JIT::emitPutJITStubArgConstant):
+        (JSC::JIT::emitGetJITStubArg):
+        (JSC::JIT::emitPutJITStubArgFromVirtualRegister):
+        * jit/JITStubCall.h:
+        (JSC::JITStubCall::JITStubCall):
+        (JSC::JITStubCall::getArgument):
+        * jit/JITStubs.h:
+
+2009-11-05  Zoltan Herczeg  <zherczeg@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31159
+        Fix branchDouble behaviour on ARM THUMB2 JIT.
+
+        The x86 branchDouble behaviour is reworked, and all JIT
+        ports should follow the x86 port. See bug 31104 and 31151
+
+        This patch contains a fix for the traditional ARM port
+
+        * assembler/ARMAssembler.h:
+        (JSC::ARMAssembler::):
+        (JSC::ARMAssembler::fmrs_r):
+        (JSC::ARMAssembler::ftosid_r):
+        * assembler/MacroAssemblerARM.h:
+        (JSC::MacroAssemblerARM::):
+        (JSC::MacroAssemblerARM::branchDouble):
+        (JSC::MacroAssemblerARM::branchConvertDoubleToInt32):
+
+2009-11-05  Chris Jerdonek  <chris.jerdonek@gmail.com>
+
+        Reviewed by Eric Seidel.
+
+        Removed the "this is part of the KDE project" comments from 
+        all *.h, *.cpp, *.idl, and *.pm files.
+        
+        https://bugs.webkit.org/show_bug.cgi?id=31167
+        
+        The maintenance and architecture page in the project wiki lists
+        this as a task.
+        
+        This change includes no changes or additions to test cases 
+        since the change affects only comments.
+        
+        * wtf/wince/FastMallocWince.h:
+
+2009-11-05  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        Use ARMv7 specific encoding for immediate constants on ARMv7 target
+        https://bugs.webkit.org/show_bug.cgi?id=31060
+
+        * assembler/ARMAssembler.cpp:
+        (JSC::ARMAssembler::getOp2): Use INVALID_IMM
+        (JSC::ARMAssembler::getImm): Use encodeComplexImm for complex immediate
+        (JSC::ARMAssembler::moveImm): Ditto.
+        (JSC::ARMAssembler::encodeComplexImm): Encode a constant by one or two
+        instructions or a PC relative load.
+        * assembler/ARMAssembler.h: Use INVALID_IMM if a constant cannot be
+        encoded as an immediate constant.
+        (JSC::ARMAssembler::):
+        (JSC::ARMAssembler::movw_r): 16-bit immediate load
+        (JSC::ARMAssembler::movt_r): High halfword 16-bit immediate load
+        (JSC::ARMAssembler::getImm16Op2): Encode immediate constant for
+        movw_r and mowt_r
+
+2009-11-04  Mark Mentovai  <mark@chromium.org>
+
+        Reviewed by Mark Rowe.
+
+        Provide TARGETING_TIGER and TARGETING_LEOPARD as analogues to
+        BUILDING_ON_TIGER and BUILDING_ON_LEOPARD.  The TARGETING_ macros
+        consider the deployment target; the BUILDING_ON_ macros consider the
+        headers being built against.
+
+        * wtf/Platform.h:
+
+2009-11-04  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31151
+        Fix branchDouble behaviour on ARM THUMB2 JIT.
+
+        The ARMv7 JIT is currently using ARMv7Assembler::ConditionEQ to branch
+        for DoubleEqualOrUnordered, however this is incorrect – ConditionEQ won't
+        branch on unordered operands.  Similarly, DoubleLessThanOrUnordered &
+        DoubleLessThanOrEqualOrUnordered use ARMv7Assembler::ConditionLO &
+        ARMv7Assembler::ConditionLS, whereas they should be using
+        ARMv7Assembler::ConditionLT & ARMv7Assembler::ConditionLE.
+
+        Fix these, and fill out the missing DoubleConditions.
+
+        * assembler/MacroAssemblerARMv7.h:
+        (JSC::MacroAssemblerARMv7::):
+        (JSC::MacroAssemblerARMv7::branchDouble):
+
+2009-11-04  Gavin Barraclough  <barraclough@apple.com>
+
+        Rubber Stamped by Oliver Hunt.
+
+        Enable native call optimizations on ARMv7.  (Existing ARM_TRADITIONAL
+        implementation was generic, worked perfectly, just needed turning on).
+
+        * jit/JITOpcodes.cpp:
+        * wtf/Platform.h:
+
+2009-11-04  Gavin Barraclough  <barraclough@apple.com>
+
+        Rubber Stamped by Mark Rowe, Oliver Hunt, and Sam Weinig.
+
+        Add a missing assert to the ARMv7 JIT.
+
+        * assembler/ARMv7Assembler.h:
+        (JSC::ARMThumbImmediate::ARMThumbImmediate):
+
+2009-11-04  Mark Rowe  <mrowe@apple.com>
+
+        Rubber-stamped by Oliver Hunt.
+
+        Remove bogus op_ prefix on dumped version of three opcodes.
+
+        * bytecode/CodeBlock.cpp:
+        (JSC::CodeBlock::dump):
+
+2009-11-04  Mark Rowe  <mrowe@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Fix dumping of constants in bytecode so that they aren't printed as large positive register numbers.
+
+        We do this by having the registerName function return information about the constant if the register
+        number corresponds to a constant.  This requires that registerName, and several functions that call it,
+        be converted to member functions of CodeBlock so that the constant value can be retrieved.  The
+        ExecState also needs to be threaded down through these functions so that it can be passed on to
+        constantName when needed.
+
+        * bytecode/CodeBlock.cpp:
+        (JSC::constantName):
+        (JSC::CodeBlock::registerName):
+        (JSC::CodeBlock::printUnaryOp):
+        (JSC::CodeBlock::printBinaryOp):
+        (JSC::CodeBlock::printConditionalJump):
+        (JSC::CodeBlock::printGetByIdOp):
+        (JSC::CodeBlock::printPutByIdOp):
+        (JSC::CodeBlock::dump):
+        * bytecode/CodeBlock.h:
+        (JSC::CodeBlock::isConstantRegisterIndex):
+
+2009-11-04  Pavel Heimlich  <tropikhajma@gmail.com>
+
+        Reviewed by Alexey Proskuryakov.
+
+        https://bugs.webkit.org/show_bug.cgi?id=30647
+        Solaris build failure due to strnstr.
+
+        * wtf/StringExtras.h: Enable strnstr on Solaris, too.
+
+2009-11-04  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31104
+        Refactor x86-specific behaviour out of the JIT.
+
+        - Add explicit double branch conditions for ordered and unordered comparisons (presently the brehaviour is a mix).
+        - Refactor double to int conversion out into the MacroAssembler.
+        - Remove broken double to int conversion for !JSVALUE32_64 builds - this code was broken and slowing us down, fixing it showed it not to be an improvement.
+        - Remove exclusion of double to int conversion from (1 % X) cases in JSVALUE32_64 builds - if this was of benefit this is no longer the case; simplify.
+
+        * assembler/MacroAssemblerARM.h:
+        (JSC::MacroAssemblerARM::):
+        * assembler/MacroAssemblerARMv7.h:
+        (JSC::MacroAssemblerARMv7::):
+        * assembler/MacroAssemblerX86Common.h:
+        (JSC::MacroAssemblerX86Common::):
+        (JSC::MacroAssemblerX86Common::convertInt32ToDouble):
+        (JSC::MacroAssemblerX86Common::branchDouble):
+        (JSC::MacroAssemblerX86Common::branchConvertDoubleToInt32):
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::emitBinaryDoubleOp):
+        (JSC::JIT::emit_op_div):
+        (JSC::JIT::emitSlow_op_jnless):
+        (JSC::JIT::emitSlow_op_jnlesseq):
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_jfalse):
+
+2009-11-04  Mark Mentovai  <mark@chromium.org>
+
+        Reviewed by Eric Seidel.
+
+        Remove BUILDING_ON_LEOPARD from JavaScriptCore.gyp.  This is supposed
+        to be set as needed only in wtf/Platform.h.
+
+        * JavaScriptCore.gyp/JavaScriptCore.gyp:
+
+2009-11-02  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        REGRESSION (r48573): JSC may incorrectly cache chain lookups with a dictionary at the head of the chain
+        https://bugs.webkit.org/show_bug.cgi?id=31045
+
+        Add guards to prevent caching of prototype chain lookups with dictionaries at the
+        head of the chain.  Also add a few tighter assertions to cached prototype lookups
+        to catch this in future.
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::tryCacheGetByID):
+        (JSC::Interpreter::privateExecute):
+        * jit/JITStubs.cpp:
+        (JSC::JITThunks::tryCacheGetByID):
+
+2009-11-02  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        PLATFORM(CF) should be set when building for Qt on Darwin
+        https://bugs.webkit.org/show_bug.cgi?id=23671
+
+        * wtf/Platform.h: Turn on CF support if both QT and DARWIN
+        platforms are defined.
+
+2009-11-02  Dmitry Titov  <dimich@chromium.org>
+
+        Reviewed by David Levin.
+
+        Remove threadsafe refcounting from tasks used with WTF::MessageQueue.
+        https://bugs.webkit.org/show_bug.cgi?id=30612
+
+        * wtf/MessageQueue.h:
+        (WTF::MessageQueue::alwaysTruePredicate):
+        (WTF::MessageQueue::~MessageQueue):
+        (WTF::MessageQueue::append):
+        (WTF::MessageQueue::appendAndCheckEmpty):
+        (WTF::MessageQueue::prepend):
+        (WTF::MessageQueue::waitForMessage):
+        (WTF::MessageQueue::waitForMessageFilteredWithTimeout):
+        (WTF::MessageQueue::tryGetMessage):
+        (WTF::MessageQueue::removeIf):
+        The MessageQueue is changed to act as a queue of OwnPtr<DataType>. It takes ownership
+        of posted tasks and passes it to the new owner (in another thread) when the task is fetched.
+        All methods have arguments of type PassOwnPtr<DataType> and return the same type.
+
+        * wtf/Threading.cpp:
+        (WTF::createThread):
+        Superficial change to trigger rebuild of JSC project on Windows,
+        workaround for https://bugs.webkit.org/show_bug.cgi?id=30890
+
+2009-10-30  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Fixed failing layout test: restore a special case I accidentally deleted.
+
+        * runtime/DatePrototype.cpp:
+        (JSC::setNewValueFromDateArgs): In the case of applying a change to a date
+        that is NaN, reset the date to 0 *and* then apply the change; don't just
+        reset the date to 0.
+
+2009-10-30  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: update for object-to-pointer change.
+
+        * runtime/DatePrototype.cpp:
+        (JSC::formatLocaleDate):
+
+2009-10-29  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=30942
+        Use pointers instead of copies to pass GregorianDateTime objects around.
+        
+        SunSpider reports a shocking 4.5% speedup on date-format-xparb, and 1.3%
+        speedup on date-format-tofte.
+
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::gregorianDateTime):
+        * runtime/DateInstance.h:
+        * runtime/DatePrototype.cpp:
+        (JSC::formatLocaleDate):
+        (JSC::dateProtoFuncToString):
+        (JSC::dateProtoFuncToUTCString):
+        (JSC::dateProtoFuncToISOString):
+        (JSC::dateProtoFuncToDateString):
+        (JSC::dateProtoFuncToTimeString):
+        (JSC::dateProtoFuncGetFullYear):
+        (JSC::dateProtoFuncGetUTCFullYear):
+        (JSC::dateProtoFuncToGMTString):
+        (JSC::dateProtoFuncGetMonth):
+        (JSC::dateProtoFuncGetUTCMonth):
+        (JSC::dateProtoFuncGetDate):
+        (JSC::dateProtoFuncGetUTCDate):
+        (JSC::dateProtoFuncGetDay):
+        (JSC::dateProtoFuncGetUTCDay):
+        (JSC::dateProtoFuncGetHours):
+        (JSC::dateProtoFuncGetUTCHours):
+        (JSC::dateProtoFuncGetMinutes):
+        (JSC::dateProtoFuncGetUTCMinutes):
+        (JSC::dateProtoFuncGetSeconds):
+        (JSC::dateProtoFuncGetUTCSeconds):
+        (JSC::dateProtoFuncGetTimezoneOffset):
+        (JSC::setNewValueFromTimeArgs):
+        (JSC::setNewValueFromDateArgs):
+        (JSC::dateProtoFuncSetYear):
+        (JSC::dateProtoFuncGetYear): Renamed getGregorianDateTime to gregorianDateTime,
+        since it no longer has an out parameter. Uses 0 to indicate invalid dates.
+
+2009-10-30  Zoltan Horvath  <zoltan@webkit.org>
+
+        Reviewed by Darin Adler.
+
+        Allow custom memory allocation control for JavaScriptCore's ListHashSet
+        https://bugs.webkit.org/show_bug.cgi?id=30853
+
+        Inherits ListHashSet class from FastAllocBase because it is
+        instantiated by 'new' in WebCore/rendering/RenderBlock.cpp:1813.
+
+        * wtf/ListHashSet.h:
+
+2009-10-30  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Regression: crash enumerating properties of an object with getters or setters
+        https://bugs.webkit.org/show_bug.cgi?id=30948
+
+        Add a guard to prevent us trying to cache property enumeration on
+        objects with getters or setters.
+
+        * runtime/JSPropertyNameIterator.cpp:
+        (JSC::JSPropertyNameIterator::create):
+
+2009-10-30  Roland Steiner  <rolandsteiner@chromium.org>
+
+        Reviewed by Eric Seidel.
+
+        Remove ENABLE_RUBY guards as discussed with Dave Hyatt and Maciej Stachowiak.
+
+        Bug 28420 -  Implement HTML5 <ruby> rendering
+        (https://bugs.webkit.org/show_bug.cgi?id=28420)
+ 
+        No new tests (no functional change).
+
+        * Configurations/FeatureDefines.xcconfig:
+
+2009-10-29  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        REGRESSION (r50218-r50262): E*TRADE accounts page is missing content
+        https://bugs.webkit.org/show_bug.cgi?id=30947
+        <rdar://problem/7348833>
+
+        The logic for flagging that a structure has non-enumerable properties
+        was in addPropertyWithoutTransition, rather than in the core Structure::put
+        method.  Despite this I was unable to produce a testcase that caused
+        the failure that etrade was experiencing, but the new assertion in
+        getEnumerablePropertyNames triggers on numerous layout tests without
+        the fix, so in effecti all for..in enumeration in any test ends up
+        doing the required consistency check.
+
+        * runtime/Structure.cpp:
+        (JSC::Structure::addPropertyWithoutTransition):
+        (JSC::Structure::put):
+        (JSC::Structure::getEnumerablePropertyNames):
+        (JSC::Structure::checkConsistency):
+
+2009-10-29  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        Add cacheFlush support for Thumb-2 on Linux
+        https://bugs.webkit.org/show_bug.cgi?id=30865
+
+        * jit/ExecutableAllocator.h:
+        (JSC::ExecutableAllocator::cacheFlush):
+
+2009-10-28  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        JSC JIT on ARMv7 cannot link jumps >16Mb range
+        https://bugs.webkit.org/show_bug.cgi?id=30891
+
+        Start planing all relative jumps as move-32-bit-immediate-to-register-BX.
+        In the cases where the jump would fall within a relative jump range, use a relative jump.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * assembler/ARMv7Assembler.h:
+        (JSC::ARMv7Assembler::~ARMv7Assembler):
+        (JSC::ARMv7Assembler::LinkRecord::LinkRecord):
+        (JSC::ARMv7Assembler::):
+        (JSC::ARMv7Assembler::executableCopy):
+        (JSC::ARMv7Assembler::linkJump):
+        (JSC::ARMv7Assembler::relinkJump):
+        (JSC::ARMv7Assembler::setInt32):
+        (JSC::ARMv7Assembler::isB):
+        (JSC::ARMv7Assembler::isBX):
+        (JSC::ARMv7Assembler::isMOV_imm_T3):
+        (JSC::ARMv7Assembler::isMOVT):
+        (JSC::ARMv7Assembler::isNOP_T1):
+        (JSC::ARMv7Assembler::isNOP_T2):
+        (JSC::ARMv7Assembler::linkJumpAbsolute):
+        (JSC::ARMv7Assembler::twoWordOp5i6Imm4Reg4EncodedImmFirst):
+        (JSC::ARMv7Assembler::twoWordOp5i6Imm4Reg4EncodedImmSecond):
+        (JSC::ARMv7Assembler::ARMInstructionFormatter::twoWordOp5i6Imm4Reg4EncodedImm):
+        * assembler/MacroAssemblerARMv7.h:
+        (JSC::MacroAssemblerARMv7::makeJump):
+        (JSC::MacroAssemblerARMv7::makeBranch):
+        * jit/JIT.h:
+        * wtf/Platform.h:
+
+2009-10-28  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Geoff Garen.
+
+        Improve for..in enumeration performance
+        https://bugs.webkit.org/show_bug.cgi?id=30887
+
+        Improve indexing of an object with a for..in iterator by
+        identifying cases where get_by_val is being used with a iterator
+        as the subscript and replace it with a new get_by_pname
+        bytecode.  get_by_pname then optimizes lookups that directly access
+        the base object.
+
+        * bytecode/CodeBlock.cpp:
+        (JSC::CodeBlock::dump):
+        * bytecode/Opcode.h:
+        * bytecompiler/BytecodeGenerator.cpp:
+        (JSC::BytecodeGenerator::emitGetByVal):
+        * bytecompiler/BytecodeGenerator.h:
+        (JSC::BytecodeGenerator::pushOptimisedForIn):
+        (JSC::BytecodeGenerator::popOptimisedForIn):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::privateExecute):
+        * jit/JIT.cpp:
+        (JSC::JIT::privateCompileMainPass):
+        (JSC::JIT::privateCompileSlowCases):
+        * jit/JIT.h:
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::compileGetDirectOffset):
+        (JSC::JIT::emit_op_get_by_pname):
+        (JSC::JIT::emitSlow_op_get_by_pname):
+        * parser/Nodes.cpp:
+        (JSC::ForInNode::emitBytecode):
+        * runtime/JSObject.h:
+        * runtime/JSPropertyNameIterator.cpp:
+        (JSC::JSPropertyNameIterator::create):
+        * runtime/JSPropertyNameIterator.h:
+        (JSC::JSPropertyNameIterator::getOffset):
+        (JSC::JSPropertyNameIterator::JSPropertyNameIterator):
+        * runtime/JSValue.h:
+        (JSC::JSValue::):
+        * runtime/Structure.cpp:
+        (JSC::Structure::addPropertyTransition):
+        (JSC::Structure::changePrototypeTransition):
+        (JSC::Structure::despecifyFunctionTransition):
+        (JSC::Structure::addAnonymousSlotsTransition):
+        (JSC::Structure::getterSetterTransition):
+        (JSC::Structure::toDictionaryTransition):
+        (JSC::Structure::addPropertyWithoutTransition):
+          Track the existence (or not) of non-enumerable properties.
+        * runtime/Structure.h:
+        (JSC::Structure::propertyStorageCapacity):
+        (JSC::Structure::propertyStorageSize):
+        (JSC::Structure::hasNonEnumerableProperties):
+        (JSC::Structure::hasAnonymousSlots):
+
+2009-10-28  Dmitry Titov  <dimich@chromium.org>
+
+        Not reviewed, attemp to fix Windows build.
+
+        Touch the cpp file to cause recompile.
+
+        * wtf/Threading.cpp:
+        (WTF::threadEntryPoint):
+
+2009-10-28  Dmitry Titov  <dimich@chromium.org>
+
+        Reviewed by David Levin.
+
+        https://bugs.webkit.org/show_bug.cgi?id=30805
+        Add MessageQueue::removeIf(Predicate&) to remove certain tasks without pulling them from the queue.
+        Existing Database tests cover this since Database removes tasks when it is stopped.
+
+        * wtf/MessageQueue.h:
+        (WTF::::removeIf):
+
+2009-10-28  Afonso R. Costa Jr.  <afonso.costa@openbossa.org>
+
+        Reviewed by Oliver Hunt.
+
+        [Qt] Enable YARR when YARR_JIT is enabled
+        https://bugs.webkit.org/show_bug.cgi?id=30730
+
+        When enabling or disabling JIT using JAVASCRIPTCORE_JIT, the ENABLE_YARR should
+        be toggled also.
+
+        * JavaScriptCore.pri:
+
+2009-10-24  Martin Robinson  <martin.james.robinson@gmail.com>
+
+        Reviewed by Oliver Hunt.
+
+        Fix strict aliasing warning by switching reinterpret_cast to bitwise_cast.
+
+        strict-aliasing warnings in JSFunction.h
+        https://bugs.webkit.org/show_bug.cgi?id=27869
+
+        * runtime/JSFunction.h:
+        (JSC::JSFunction::nativeFunction):
+        (JSC::JSFunction::scopeChain):
+        (JSC::JSFunction::setScopeChain):
+        (JSC::JSFunction::setNativeFunction):
+
+2009-10-28  Jan-Arve Sæther <jan-arve.saether@nokia.com>
+
+        Reviewed by Tor Arne Vestbø.
+
+        Build-fix for 64-bit Windows
+
+        * wtf/Platform.h: Make sure to use WTF_USE_JSVALUE64
+
+2009-10-28  Gavin Barraclough  <barraclough@apple.com>
+
+        Reviewed by NOBODY (build fix!).
+
+        * jit/JIT.h:
+
+2009-10-26  Holger Hans Peter Freyther  <zecke@selfish.org>
+
+        Rubber-stamped by Darin Adler.
+
+        Export fastMalloc, fastCalloc, fastRealloc and fastFree on GCC/Unix
+        https://bugs.webkit.org/show_bug.cgi?id=30769
+
+        When using -fvisibility=hidden to hide all internal symbols by default
+        the malloc symbols will be hidden as well. For memory instrumentation
+        it is needed to provide an instrumented version of these symbols and
+        override the normal routines and by changing the visibility back to
+        default this becomes possible.
+
+        The only other solution would be to use system malloc instead of the
+        TCmalloc implementation but this will not allow to analyze memory
+        behavior with the default allocator.
+
+        * wtf/FastMalloc.h: Define WTF_FAST_MALLOC_EXPORT for GCC and !darwin
+
+2009-10-27  Gavin Barraclough  <barraclough@apple.com>
+
+        Rubber Stamped by Samuel Q. Weinig.
+
+        Make the asserts protecting the offsets in the JIT more descriptive.
+
+        * jit/JIT.h:
+        * jit/JITCall.cpp:
+        (JSC::JIT::compileOpCall):
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::emit_op_method_check):
+        (JSC::JIT::compileGetByIdHotPath):
+        (JSC::JIT::compileGetByIdSlowCase):
+        (JSC::JIT::emit_op_put_by_id):
+
+2009-10-27  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        A little bit of refactoring in the date code.
+
+        * JavaScriptCore.exp: Don't export this unused symbol.
+
+        * runtime/DateConstructor.cpp:
+        (JSC::constructDate):
+
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::DateInstance):
+        * runtime/DateInstance.h: Removed some unused functions. Changed the default
+        constructor to ensure that a DateInstance is always initialized.
+
+        * runtime/DatePrototype.cpp:
+        (JSC::DatePrototype::DatePrototype): Pass an initializer to our constructor,
+        since it now requires one.
+
+        * wtf/DateMath.cpp:
+        (WTF::msToGregorianDateTime): Only compute our offset from UTC if our
+        output will require it. Otherwise, our offset is 0.
+
+2009-10-27  Geoffrey Garen  <ggaren@apple.com>
+
+        Build fix: Mark DateInstaceCache.h private, so other frameworks can see it.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+
+2009-10-27  Geoffrey Garen  <ggaren@apple.com>
+
+        Build fix: re-readded this file.
+
+        * runtime/DateInstanceCache.h: Added.
+        (JSC::DateInstanceData::create):
+        (JSC::DateInstanceData::DateInstanceData):
+        (JSC::DateInstanceCache::DateInstanceCache):
+        (JSC::DateInstanceCache::add):
+        (JSC::DateInstanceCache::lookup):
+
+2009-10-27  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Darin Adler and Oliver Hunt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=30800
+        Cache recently computed date data.
+        
+        SunSpider reports a ~0.5% speedup, mostly from date-format-tofte.js.
+
+        * GNUmakefile.am:
+        * JavaScriptCore.gypi:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
+        * JavaScriptCore.xcodeproj/project.pbxproj: Added new file.
+
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::DateInstance):
+        (JSC::DateInstance::getGregorianDateTime): Use the shared cache.
+
+        * runtime/DateInstance.h: Renamed m_cache to m_data, to avoid the confusion
+        of a "cache cache".
+
+        * runtime/DatePrototype.cpp:
+        (JSC::formatLocaleDate):
+        (JSC::dateProtoFuncToString):
+        (JSC::dateProtoFuncToUTCString):
+        (JSC::dateProtoFuncToISOString):
+        (JSC::dateProtoFuncToDateString):
+        (JSC::dateProtoFuncToTimeString):
+        (JSC::dateProtoFuncGetFullYear):
+        (JSC::dateProtoFuncGetUTCFullYear):
+        (JSC::dateProtoFuncToGMTString):
+        (JSC::dateProtoFuncGetMonth):
+        (JSC::dateProtoFuncGetUTCMonth):
+        (JSC::dateProtoFuncGetDate):
+        (JSC::dateProtoFuncGetUTCDate):
+        (JSC::dateProtoFuncGetDay):
+        (JSC::dateProtoFuncGetUTCDay):
+        (JSC::dateProtoFuncGetHours):
+        (JSC::dateProtoFuncGetUTCHours):
+        (JSC::dateProtoFuncGetMinutes):
+        (JSC::dateProtoFuncGetUTCMinutes):
+        (JSC::dateProtoFuncGetSeconds):
+        (JSC::dateProtoFuncGetUTCSeconds):
+        (JSC::dateProtoFuncGetTimezoneOffset):
+        (JSC::setNewValueFromTimeArgs):
+        (JSC::setNewValueFromDateArgs):
+        (JSC::dateProtoFuncSetYear):
+        (JSC::dateProtoFuncGetYear): Pass an ExecState to these functions, so they
+        can access the DateInstanceCache.
+
+        * runtime/JSGlobalData.h: Keep a DateInstanceCache.
+
+2009-10-27  James Robinson  <jamesr@chromium.org>
+
+        Reviewed by Darin Fisher.
+
+        Ensures that JavaScriptCore/wtf/CurrentTime.cpp is not built in PLATFORM(CHROMIUM) builds.
+
+        Chromium uses a different method to calculate the current time than is used in
+        JavaScriptCore/wtf/CurrentTime.cpp. This can lead to time skew when calls to currentTime() and Chromium's time
+        function are mixed.  In particular, timers can get scheduled in the past which leads to 100% CPU use.
+        See http://code.google.com/p/chromium/issues/detail?id=25892 for an example.
+
+        https://bugs.webkit.org/show_bug.cgi?id=30833
+
+        * JavaScriptCore.gyp/JavaScriptCore.gyp:
+        * wtf/CurrentTime.cpp:
+
+2009-10-27  Peter Varga  <pvarga@inf.u-szeged.hu>
+
+        Rubber-stamped by Tor Arne Vestbø.
+
+        Fix typo in RegexInterpreter.cpp and RegexJIT.cpp alterantive to
+        alternative.
+
+        * yarr/RegexInterpreter.cpp:
+        (JSC::Yarr::ByteCompiler::alternativeBodyDisjunction):
+        (JSC::Yarr::ByteCompiler::alternativeDisjunction):
+        (JSC::Yarr::ByteCompiler::emitDisjunction):
+        * yarr/RegexJIT.cpp:
+        (JSC::Yarr::RegexGenerator::generateDisjunction):
+
+2009-10-26  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        Make .rc files compile on Windows without depending on MFC headers
+        https://bugs.webkit.org/show_bug.cgi?id=30750
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.rc: Use
+        winresrc.h because it exists even when MFC is not installed, and is
+        all that's needed here.
+
+2009-10-26  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        The thunkReturnAddress is on JITStackFrame on ARM JIT as well
+        https://bugs.webkit.org/show_bug.cgi?id=30782
+
+        Move the thunkReturnAddress from top of the stack into the JITStackFrame
+        structure. This is a requirement for JSValue32_64 support on ARM.
+
+        * assembler/MacroAssemblerARM.h:
+        (JSC::MacroAssemblerARM::ret): Return with link register
+        (JSC::MacroAssemblerARM::prepareCall): Store the return address in link register
+        * jit/JIT.h: Remove unused ctiReturnRegister
+        * jit/JITInlineMethods.h: Same as ARMv7
+        (JSC::JIT::restoreArgumentReference): Ditto.
+        (JSC::JIT::restoreArgumentReferenceForTrampoline): Ditto.
+        * jit/JITOpcodes.cpp: Remove ctiReturnRegister related instruction
+        * jit/JITStubs.cpp: Store thunkReturnAddress on JITStackFrame. Use
+        small trampoline functions which handle return addresses for each
+        CTI_STUB_FUNCTION.
+        * jit/JITStubs.h: Store thunkReturnAddress on JITStackFrame
+        (JSC::JITStackFrame::returnAddressSlot): Return with the address of thunkReturnAddress
+        * yarr/RegexJIT.cpp:
+        (JSC::Yarr::RegexGenerator::generateEnter): Remove the unnecessary instruction
+
+2009-10-26  Steve Block  <steveblock@google.com>
+
+        Reviewed by Darin Adler.
+
+        Adds ability to disable ReadWriteLock on platforms (eg Android) that use pthreads but do not support pthread_rwlock.
+        https://bugs.webkit.org/show_bug.cgi?id=30713
+
+        * wtf/Platform.h: Modified. Defines HAVE_PTHREAD_RWLOCK for all platforms currently using pthreads.
+        * wtf/Threading.h: Modified. Use pthread_rwlock_t only when HAVE_PTHREAD_RWLOCK is defined.
+        * wtf/ThreadingPthreads.cpp: Modified. Build ReadWriteLock methods only when HAVE_PTHREAD_RWLOCK is defined.
+
+2009-10-24  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Holger Freyther.
+
+        [Qt] [Symbian] Set the capability and memory required to run QtWebKit for Symbian
+        https://bugs.webkit.org/show_bug.cgi?id=30476
+
+        Assign ReadUserData WriteUserData NetworkServices Symbian capabilities
+        to jsc.exe.
+
+        * jsc.pro:
+
+2009-10-23  Steve Block  <steveblock@google.com>
+
+        Reviewed by Dmitry Titov.
+
+        Fixes a leak in createThreadInternal on Android.
+        https://bugs.webkit.org/show_bug.cgi?id=30698
+
+        * wtf/ThreadingPthreads.cpp: Modified.
+        (WTF::createThreadInternal): Avoid leaking a ThreadData object on failure.
+
+2009-10-22  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Alexey Proskuryakov.
+
+        Fixed ASSERT when opening Safari's Caches window while the Web Inspector
+        is open.
+
+        * runtime/Collector.cpp:
+        (JSC::typeName): Added two new types to the type name list in the Collector.
+        These types have been around for a while, but nobody remembered to consider them here.
+
+        * runtime/JSCell.h:
+        (JSC::JSCell::isPropertyNameIterator):
+        * runtime/JSPropertyNameIterator.h:
+        (JSC::JSPropertyNameIterator::isPropertyNameIterator): Give the Collector
+        a way to tell if a cell is a JSPropertyNameIterator.
+
+2009-10-22  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Jon Honeycutt.
+
+        https://bugs.webkit.org/show_bug.cgi?id=30686
+        Remove debug-specific def file.
+        Only Debug_All target uses JavaScriptCore_debug.dll naming, and since
+        that target is only used internally, maintaining two files just to
+        suppress a single link warning isn't worthwhile.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreCommon.vsprops:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def: Removed.
+
+2009-10-21  Jon Honeycutt  <jhoneycutt@apple.com>
+
+        <rdar://problem/7270320> Screenshots of off-screen plug-ins are blank
+        <rdar://problem/7270314> After halting a transparent PluginView on
+        Windows, the transparency is applied twice
+
+        Reviewed by Dan Bernstein.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        Export WTF::deleteOwnedPtr(HDC).
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+        Ditto.
+
+2009-10-20  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: updated variable name.
+
+        * runtime/DatePrototype.cpp:
+        (JSC::formatLocaleDate):
+
+2009-10-20  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Mark Rowe.
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_next_pname): Slightly tweaked this #ifdef to match the
+        size of a JSValue because m_jsStrings is an array of JSValues.
+
+2009-10-20  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Mark Rowe.
+
+        Fixed a 64-bit regression caused by the fix for
+        https://bugs.webkit.org/show_bug.cgi?id=30570.
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_next_pname): Use TimesEight stepping on 64-bit, since
+        64-bit pointers are eight bytes long.
+
+2009-10-20  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Refactored DateInstance::msToGregorianDateTime so that a DateInstance's
+        caller doesn't need to supply the DateInstance's own internal value to
+        the DateInstance.
+
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::getGregorianDateTime): Renamed from "msToGregorianDateTime".
+
+        * runtime/DateInstance.h:
+        * runtime/DatePrototype.cpp:
+        (JSC::formatLocaleDate):
+        (JSC::dateProtoFuncToString):
+        (JSC::dateProtoFuncToUTCString):
+        (JSC::dateProtoFuncToISOString):
+        (JSC::dateProtoFuncToDateString):
+        (JSC::dateProtoFuncToTimeString):
+        (JSC::dateProtoFuncToLocaleString):
+        (JSC::dateProtoFuncToLocaleDateString):
+        (JSC::dateProtoFuncToLocaleTimeString):
+        (JSC::dateProtoFuncGetTime):
+        (JSC::dateProtoFuncGetFullYear):
+        (JSC::dateProtoFuncGetUTCFullYear):
+        (JSC::dateProtoFuncToGMTString):
+        (JSC::dateProtoFuncGetMonth):
+        (JSC::dateProtoFuncGetUTCMonth):
+        (JSC::dateProtoFuncGetDate):
+        (JSC::dateProtoFuncGetUTCDate):
+        (JSC::dateProtoFuncGetDay):
+        (JSC::dateProtoFuncGetUTCDay):
+        (JSC::dateProtoFuncGetHours):
+        (JSC::dateProtoFuncGetUTCHours):
+        (JSC::dateProtoFuncGetMinutes):
+        (JSC::dateProtoFuncGetUTCMinutes):
+        (JSC::dateProtoFuncGetSeconds):
+        (JSC::dateProtoFuncGetUTCSeconds):
+        (JSC::dateProtoFuncGetTimezoneOffset):
+        (JSC::setNewValueFromTimeArgs):
+        (JSC::setNewValueFromDateArgs):
+        (JSC::dateProtoFuncSetYear):
+        (JSC::dateProtoFuncGetYear): Also renamed "utc" to "outputIsUTC", for clarity.
+
+2009-10-20  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Geoffrey Garen.
+
+        The op_next_pname should use 4 bytes addressing mode in case of JSValue32
+        https://bugs.webkit.org/show_bug.cgi?id=30570
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_next_pname):
+
+2009-10-20  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Oliver Hunt.
+
+        Move OverridesMarkChildren flag from DatePrototype to its parent class
+        https://bugs.webkit.org/show_bug.cgi?id=30372
+
+        * runtime/DateInstance.h:
+        (JSC::DateInstance::createStructure):
+        * runtime/DatePrototype.h:
+
+2009-10-19  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Tightened up some put_by_id_transition code generation.
+        https://bugs.webkit.org/show_bug.cgi?id=30539
+
+        * jit/JIT.h:
+        * jit/JITPropertyAccess.cpp:
+        (JSC::JIT::testPrototype):
+        (JSC::JIT::privateCompilePutByIdTransition): No need to do object type
+        checks or read Structures and prototypes from objects: they're all known
+        constants at compile time.
+
+2009-10-19  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Added a private API for getting a global context from a context, for
+        clients who want to preserve a context for a later callback.
+
+        * API/APICast.h:
+        (toGlobalRef): Added an ASSERT, since this function is used more often
+        than before.
+
+        * API/JSContextRef.cpp:
+        * API/JSContextRefPrivate.h: Added. The new API.
+
+        * API/tests/testapi.c:
+        (print_callAsFunction):
+        (main): Test the new API.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.xcodeproj/project.pbxproj: Build and export the new API.
+
+2009-10-17  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+        
+        Tightened up some instanceof code generation.
+        https://bugs.webkit.org/show_bug.cgi?id=30488
+
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_instanceof):
+        (JSC::JIT::emitSlow_op_instanceof): No need to do object type checks - 
+        cell type checks and ImplementsDefaultHasIntance checks implicitly
+        supersede object type checks.
+
+2009-10-18  Kwang Yul Seo  <skyul@company100.net>
+
+        Reviewed by Darin Adler.
+
+        Use _stricmp and _strnicmp instead of deprecated stricmp and strnicmp.
+        https://bugs.webkit.org/show_bug.cgi?id=30474
+
+        stricmp and strnicmp are deprecated beginning in Visual
+        C++ 2005. Use _stricmp and _strnicmp instead in StringExtras.h.
+
+        * wtf/StringExtras.h:
+        (strncasecmp):
+        (strcasecmp):
+
+2009-10-16  Geoffrey Garen  <ggaren@apple.com>
+
+        Build fix: apparently we shouldn't export those symbols?
+
+        * JavaScriptCore.exp:
+
+2009-10-16  Geoffrey Garen  <ggaren@apple.com>
+
+        Build fix: export some symbols.
+
+        * JavaScriptCore.exp:
+
+2009-10-16  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        structure typeinfo flags should be inherited.
+        https://bugs.webkit.org/show_bug.cgi?id=30468
+
+        Add StructureFlag constant to the various JSC classes and use
+        it for the TypeInfo construction.  This allows us to simply
+        accumulate flags by basing each classes StructureInfo on its parents.
+
+        * API/JSCallbackConstructor.h:
+        (JSC::JSCallbackConstructor::createStructure):
+        * API/JSCallbackFunction.h:
+        (JSC::JSCallbackFunction::createStructure):
+        * API/JSCallbackObject.h:
+        (JSC::JSCallbackObject::createStructure):
+        * debugger/DebuggerActivation.h:
+        (JSC::DebuggerActivation::createStructure):
+        * runtime/Arguments.h:
+        (JSC::Arguments::createStructure):
+        * runtime/BooleanObject.h:
+        (JSC::BooleanObject::createStructure):
+        * runtime/DatePrototype.h:
+        (JSC::DatePrototype::createStructure):
+        * runtime/FunctionPrototype.h:
+        (JSC::FunctionPrototype::createStructure):
+        * runtime/GlobalEvalFunction.h:
+        (JSC::GlobalEvalFunction::createStructure):
+        * runtime/InternalFunction.h:
+        (JSC::InternalFunction::createStructure):
+        * runtime/JSActivation.h:
+        (JSC::JSActivation::createStructure):
+        * runtime/JSArray.h:
+        (JSC::JSArray::createStructure):
+        * runtime/JSByteArray.cpp:
+        (JSC::JSByteArray::createStructure):
+        * runtime/JSByteArray.h:
+        * runtime/JSFunction.h:
+        (JSC::JSFunction::createStructure):
+        * runtime/JSGlobalObject.h:
+        (JSC::JSGlobalObject::createStructure):
+        * runtime/JSNotAnObject.h:
+        (JSC::JSNotAnObject::createStructure):
+        * runtime/JSONObject.h:
+        (JSC::JSONObject::createStructure):
+        * runtime/JSObject.h:
+        (JSC::JSObject::createStructure):
+        * runtime/JSStaticScopeObject.h:
+        (JSC::JSStaticScopeObject::createStructure):
+        * runtime/JSVariableObject.h:
+        (JSC::JSVariableObject::createStructure):
+        * runtime/JSWrapperObject.h:
+        (JSC::JSWrapperObject::createStructure):
+        * runtime/MathObject.h:
+        (JSC::MathObject::createStructure):
+        * runtime/NumberConstructor.h:
+        (JSC::NumberConstructor::createStructure):
+        * runtime/NumberObject.h:
+        (JSC::NumberObject::createStructure):
+        * runtime/RegExpConstructor.h:
+        (JSC::RegExpConstructor::createStructure):
+        * runtime/RegExpObject.h:
+        (JSC::RegExpObject::createStructure):
+        * runtime/StringObject.h:
+        (JSC::StringObject::createStructure):
+        * runtime/StringObjectThatMasqueradesAsUndefined.h:
+        (JSC::StringObjectThatMasqueradesAsUndefined::createStructure):
+
+2009-10-16  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+        
+        Fast for-in enumeration: Cache JSPropertyNameIterator; cache JSStrings
+        in JSPropertyNameIterator; inline more code.
+
+        1.024x as fast on SunSpider (fasta: 1.43x as fast).
+
+        * bytecode/CodeBlock.cpp:
+        (JSC::CodeBlock::dump):
+        * bytecode/Opcode.h:
+        * bytecompiler/BytecodeGenerator.cpp:
+        (JSC::BytecodeGenerator::emitGetPropertyNames):
+        (JSC::BytecodeGenerator::emitNextPropertyName):
+        * bytecompiler/BytecodeGenerator.h: Added a few extra operands to
+        op_get_pnames and op_next_pname so that we can track iteration state
+        in the register file instead of in the JSPropertyNameIterator. (To be
+        cacheable, the JSPropertyNameIterator must be stateless.)
+
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::tryCachePutByID):
+        (JSC::Interpreter::tryCacheGetByID): Updated for rename to
+        "normalizePrototypeChain" and removal of "isCacheable". 
+
+        (JSC::Interpreter::privateExecute): Updated for in-RegisterFile
+        iteration state tracking.
+
+        * jit/JIT.cpp:
+        (JSC::JIT::privateCompileMainPass):
+        * jit/JIT.h:
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_get_pnames): Updated for in-RegisterFile
+        iteration state tracking.
+
+        (JSC::JIT::emit_op_next_pname): Inlined code generation for op_next_pname.
+
+        * jit/JITStubs.cpp:
+        (JSC::JITThunks::tryCachePutByID):
+        (JSC::JITThunks::tryCacheGetByID): Updated for rename to
+        "normalizePrototypeChain" and removal of "isCacheable". 
+
+        (JSC::DEFINE_STUB_FUNCTION):
+        * jit/JITStubs.h:
+        (JSC::): Added has_property and to_object stubs. Removed op_next_pname
+        stub, since has_property is all we need anymore.
+
+        * parser/Nodes.cpp:
+        (JSC::ForInNode::emitBytecode): Updated for in-RegisterFile
+        iteration state tracking.
+
+        * runtime/JSCell.h:
+        * runtime/JSObject.cpp:
+        (JSC::JSObject::getPropertyNames): Don't do caching at this layer
+        anymore, since we don't create a JSPropertyNameIterator at this layer.
+
+        * runtime/JSPropertyNameIterator.cpp:
+        (JSC::JSPropertyNameIterator::create): Do do caching at this layer.
+        (JSC::JSPropertyNameIterator::get):  Updated for in-RegisterFile
+        iteration state tracking.
+        (JSC::JSPropertyNameIterator::markChildren): Mark our JSStrings.
+
+        * runtime/JSPropertyNameIterator.h:
+        (JSC::JSPropertyNameIterator::size):
+        (JSC::JSPropertyNameIterator::setCachedStructure):
+        (JSC::JSPropertyNameIterator::cachedStructure):
+        (JSC::JSPropertyNameIterator::setCachedPrototypeChain):
+        (JSC::JSPropertyNameIterator::cachedPrototypeChain):
+        (JSC::JSPropertyNameIterator::JSPropertyNameIterator):
+        (JSC::Structure::setEnumerationCache): Don't store iteration state in
+        a JSPropertyNameIterator. Do cache a JSPropertyNameIterator in a
+        Structure.
+
+        * runtime/JSValue.h:
+        (JSC::asCell):
+        * runtime/MarkStack.h: Make those mischievous #include gods happy.
+
+        * runtime/ObjectConstructor.cpp:
+
+        * runtime/Operations.h:
+        (JSC::normalizePrototypeChain): Renamed countPrototypeChainEntriesAndCheckForProxies
+        to normalizePrototypeChain, since it changes dictionary prototypes to
+        non-dictionary objects.
+
+        * runtime/PropertyNameArray.cpp:
+        (JSC::PropertyNameArray::add):
+        * runtime/PropertyNameArray.h:
+        (JSC::PropertyNameArrayData::PropertyNameArrayData):
+        (JSC::PropertyNameArray::data):
+        (JSC::PropertyNameArray::size):
+        (JSC::PropertyNameArray::begin):
+        (JSC::PropertyNameArray::end): Simplified some code here to help with
+        current and future refactoring.
+
+        * runtime/Protect.h:
+        * runtime/Structure.cpp:
+        (JSC::Structure::~Structure):
+        (JSC::Structure::addPropertyWithoutTransition):
+        (JSC::Structure::removePropertyWithoutTransition): No need to clear
+        the enumeration cache with adding / removing properties without
+        transition. It is an error to add / remove properties without transition
+        once an object has been observed, and we can ASSERT to catch that.
+
+        * runtime/Structure.h:
+        (JSC::Structure::enumerationCache): Changed the enumeration cache to
+        hold a JSPropertyNameIterator.
+
+        * runtime/StructureChain.cpp:
+        * runtime/StructureChain.h:
+        (JSC::StructureChain::head): Removed StructureChain::isCacheable because
+        it was wrong-headed in two ways: (1) It gave up when a prototype was a
+        dictionary, but instead we want un-dictionary heavily accessed
+        prototypes; (2) It folded a test for hasDefaultGetPropertyNames() into
+        a generic test for "cacheable-ness", but hasDefaultGetPropertyNames()
+        is only releavant to for-in caching.
+
+2009-10-16  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Adam Roben.
+
+        Add a Debug_All configuration to build entire stack as debug.
+        Change Debug_Internal to:
+        - stop using _debug suffix for all WebKit/Safari binaries
+        - not use _debug as a DLL naming suffix
+        - use non-debug C runtime lib.
+
+        * JavaScriptCore.vcproj/JavaScriptCore.make: Debug build in makefile should build Debug_All.
+        * JavaScriptCore.vcproj/JavaScriptCore.sln: Add Debug_All configuration.
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj: Add Debug_All configuration.
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreGenerated.vcproj: Renamed single configuration from "Release" to "all".
+        * JavaScriptCore.vcproj/JavaScriptCoreSubmit.sln: Add Debug_All configuration.
+        * JavaScriptCore.vcproj/WTF/WTF.vcproj: Add Debug_All configuration.
+        * JavaScriptCore.vcproj/jsc/jsc.vcproj: Add Debug_All configuration.
+        * JavaScriptCore.vcproj/testapi/testapi.vcproj: Add Debug_All configuration.
+
+2009-10-16  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Make typeinfo flags default to false
+        https://bugs.webkit.org/show_bug.cgi?id=30372
+
+        Last part -- replace HasDefaultGetPropertyNames with OverridesGetPropertyNames
+        flag.
+
+        * API/JSCallbackConstructor.h:
+        (JSC::JSCallbackConstructor::createStructure):
+        * API/JSCallbackObject.h:
+        (JSC::JSCallbackObject::createStructure):
+        * debugger/DebuggerActivation.h:
+        (JSC::DebuggerActivation::createStructure):
+        * runtime/Arguments.h:
+        (JSC::Arguments::createStructure):
+        * runtime/BooleanObject.h:
+        (JSC::BooleanObject::createStructure):
+        * runtime/DatePrototype.h:
+        (JSC::DatePrototype::createStructure):
+        * runtime/FunctionPrototype.h:
+        (JSC::FunctionPrototype::createStructure):
+        * runtime/GlobalEvalFunction.h:
+        (JSC::GlobalEvalFunction::createStructure):
+        * runtime/JSAPIValueWrapper.h:
+        (JSC::JSAPIValueWrapper::createStructure):
+        * runtime/JSActivation.h:
+        (JSC::JSActivation::createStructure):
+        * runtime/JSArray.h:
+        (JSC::JSArray::createStructure):
+        * runtime/JSByteArray.cpp:
+        (JSC::JSByteArray::createStructure):
+        * runtime/JSFunction.h:
+        (JSC::JSFunction::createStructure):
+        * runtime/JSGlobalObject.h:
+        (JSC::JSGlobalObject::createStructure):
+        * runtime/JSNotAnObject.h:
+        (JSC::JSNotAnObject::createStructure):
+        * runtime/JSONObject.h:
+        (JSC::JSONObject::createStructure):
+        * runtime/JSObject.cpp:
+        (JSC::JSObject::getPropertyNames):
+        * runtime/JSObject.h:
+        (JSC::JSObject::createStructure):
+        * runtime/JSStaticScopeObject.h:
+        (JSC::JSStaticScopeObject::createStructure):
+        * runtime/JSTypeInfo.h:
+        (JSC::TypeInfo::overridesGetPropertyNames):
+        * runtime/JSVariableObject.h:
+        (JSC::JSVariableObject::createStructure):
+        * runtime/JSWrapperObject.h:
+        (JSC::JSWrapperObject::createStructure):
+        * runtime/MathObject.h:
+        (JSC::MathObject::createStructure):
+        * runtime/NumberConstructor.h:
+        (JSC::NumberConstructor::createStructure):
+        * runtime/NumberObject.h:
+        (JSC::NumberObject::createStructure):
+        * runtime/RegExpConstructor.h:
+        (JSC::RegExpConstructor::createStructure):
+        * runtime/RegExpObject.h:
+        (JSC::RegExpObject::createStructure):
+        * runtime/StringObject.h:
+        (JSC::StringObject::createStructure):
+        * runtime/StringObjectThatMasqueradesAsUndefined.h:
+        (JSC::StringObjectThatMasqueradesAsUndefined::createStructure):
+        * runtime/StructureChain.cpp:
+        (JSC::StructureChain::isCacheable):
+
+2009-10-16  Kevin Ollivier  <kevino@theolliviers.com>
+
+        wxMSW build fix, we can't use the simple hash there because the PlatformModuleVersion 
+        structure differs.
+
+        * wtf/Platform.h:
+
+2009-10-16  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Implement ExecutableAllocator for Symbian
+        https://bugs.webkit.org/show_bug.cgi?id=29946
+
+        Tested with YARR JIT enabled for Symbian; 
+        This patch does not (yet) enable YARR JIT by default.
+
+        * JavaScriptCore.pri:
+        * jit/ExecutableAllocator.h:
+        * jit/ExecutableAllocatorSymbian.cpp: Added.
+        (JSC::ExecutableAllocator::intializePageSize):
+        (JSC::ExecutablePool::systemAlloc):
+        (JSC::ExecutablePool::systemRelease):
+
+2009-10-15  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Darin Adler.
+
+        Make typeinfo flags default to false
+        https://bugs.webkit.org/show_bug.cgi?id=30372
+
+        Part 2 -- Reverse the TypeInfo HasDefaultMark flag to OverridesMarkChildren, etc
+
+        * API/JSCallbackConstructor.h:
+        (JSC::JSCallbackConstructor::createStructure):
+        * API/JSCallbackFunction.h:
+        (JSC::JSCallbackFunction::createStructure):
+        * API/JSCallbackObject.h:
+        (JSC::JSCallbackObject::createStructure):
+        * debugger/DebuggerActivation.h:
+        (JSC::DebuggerActivation::createStructure):
+        * runtime/Arguments.h:
+        (JSC::Arguments::createStructure):
+        * runtime/BooleanObject.h:
+        (JSC::BooleanObject::createStructure):
+        * runtime/DatePrototype.h:
+        (JSC::DatePrototype::createStructure):
+        * runtime/FunctionPrototype.h:
+        (JSC::FunctionPrototype::createStructure):
+        * runtime/GetterSetter.h:
+        (JSC::GetterSetter::createStructure):
+        * runtime/GlobalEvalFunction.h:
+        (JSC::GlobalEvalFunction::createStructure):
+        * runtime/InternalFunction.h:
+        (JSC::InternalFunction::createStructure):
+        * runtime/JSAPIValueWrapper.h:
+        (JSC::JSAPIValueWrapper::createStructure):
+        * runtime/JSActivation.h:
+        (JSC::JSActivation::createStructure):
+        * runtime/JSArray.h:
+        (JSC::JSArray::createStructure):
+        (JSC::MarkStack::markChildren):
+        * runtime/JSByteArray.cpp:
+        (JSC::JSByteArray::createStructure):
+        * runtime/JSFunction.h:
+        (JSC::JSFunction::createStructure):
+        * runtime/JSGlobalObject.h:
+        (JSC::JSGlobalObject::createStructure):
+        * runtime/JSNotAnObject.h:
+        (JSC::JSNotAnObject::createStructure):
+        * runtime/JSNumberCell.h:
+        (JSC::JSNumberCell::createStructure):
+        * runtime/JSONObject.h:
+        (JSC::JSONObject::createStructure):
+        * runtime/JSObject.h:
+        (JSC::JSObject::createStructure):
+        * runtime/JSPropertyNameIterator.h:
+        (JSC::JSPropertyNameIterator::createStructure):
+        * runtime/JSStaticScopeObject.h:
+        (JSC::JSStaticScopeObject::createStructure):
+        * runtime/JSString.h:
+        (JSC::JSString::createStructure):
+        * runtime/JSTypeInfo.h:
+        (JSC::TypeInfo::overridesMarkChildren):
+        * runtime/JSVariableObject.h:
+        (JSC::JSVariableObject::createStructure):
+        * runtime/JSWrapperObject.h:
+        (JSC::JSWrapperObject::createStructure):
+        * runtime/MathObject.h:
+        (JSC::MathObject::createStructure):
+        * runtime/NumberConstructor.h:
+        (JSC::NumberConstructor::createStructure):
+        * runtime/NumberObject.h:
+        (JSC::NumberObject::createStructure):
+        * runtime/RegExpConstructor.h:
+        (JSC::RegExpConstructor::createStructure):
+        * runtime/RegExpObject.h:
+        (JSC::RegExpObject::createStructure):
+        * runtime/StringObject.h:
+        (JSC::StringObject::createStructure):
+        * runtime/StringObjectThatMasqueradesAsUndefined.h:
+        (JSC::StringObjectThatMasqueradesAsUndefined::createStructure):
+
+2009-10-14  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Geoff Garen.
+
+        Make typeinfo flags default to false
+        https://bugs.webkit.org/show_bug.cgi?id=30372
+        
+        Part 1. Reverse the HasStandardGetOwnPropertySlot flag.
+
+        * API/JSCallbackConstructor.h:
+        (JSC::JSCallbackConstructor::createStructure):
+        * API/JSCallbackFunction.h:
+        (JSC::JSCallbackFunction::createStructure):
+        * API/JSCallbackObject.h:
+        (JSC::JSCallbackObject::createStructure):
+        * debugger/DebuggerActivation.h:
+        (JSC::DebuggerActivation::createStructure):
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/Arguments.h:
+        (JSC::Arguments::createStructure):
+        * runtime/BooleanObject.h:
+        (JSC::BooleanObject::createStructure):
+        * runtime/DatePrototype.h:
+        (JSC::DatePrototype::createStructure):
+        * runtime/FunctionPrototype.h:
+        (JSC::FunctionPrototype::createStructure):
+        * runtime/GlobalEvalFunction.h:
+        (JSC::GlobalEvalFunction::createStructure):
+        * runtime/InternalFunction.h:
+        (JSC::InternalFunction::createStructure):
+        * runtime/JSActivation.h:
+        (JSC::JSActivation::createStructure):
+        * runtime/JSArray.h:
+        (JSC::JSArray::createStructure):
+        * runtime/JSByteArray.cpp:
+        (JSC::JSByteArray::createStructure):
+        * runtime/JSFunction.h:
+        (JSC::JSFunction::createStructure):
+        * runtime/JSGlobalObject.h:
+        (JSC::JSGlobalObject::createStructure):
+        * runtime/JSNumberCell.h:
+        (JSC::JSNumberCell::createStructure):
+        * runtime/JSONObject.h:
+        (JSC::JSONObject::createStructure):
+        * runtime/JSObject.h:
+        (JSC::JSObject::createStructure):
+        (JSC::JSCell::fastGetOwnPropertySlot):
+        * runtime/JSStaticScopeObject.h:
+        (JSC::JSStaticScopeObject::createStructure):
+        * runtime/JSString.h:
+        (JSC::JSString::createStructure):
+        * runtime/JSTypeInfo.h:
+        (JSC::TypeInfo::overridesGetOwnPropertySlot):
+        * runtime/JSVariableObject.h:
+        (JSC::JSVariableObject::createStructure):
+        * runtime/JSWrapperObject.h:
+        (JSC::JSWrapperObject::createStructure):
+        * runtime/MathObject.h:
+        (JSC::MathObject::createStructure):
+        * runtime/NumberConstructor.h:
+        (JSC::NumberConstructor::createStructure):
+        * runtime/NumberObject.h:
+        (JSC::NumberObject::createStructure):
+        * runtime/RegExpConstructor.h:
+        (JSC::RegExpConstructor::createStructure):
+        * runtime/RegExpObject.h:
+        (JSC::RegExpObject::createStructure):
+        * runtime/StringObject.h:
+        (JSC::StringObject::createStructure):
+        * runtime/StringObjectThatMasqueradesAsUndefined.h:
+        (JSC::StringObjectThatMasqueradesAsUndefined::createStructure):
+
+2009-10-14  Kevin Ollivier  <kevino@theolliviers.com>
+2009-10-14  Darin Adler  <darin@apple.com>
+
+        Additions so fix for https://bugs.webkit.org/show_bug.cgi?id=18994
+        can build on Windows.
+
+        * wtf/MathExtras.h: Added llround and llroundf for Windows.
+
+2009-10-14  Kevin Ollivier  <kevino@theolliviers.com>
+
+        wx build fix. Set ENABLE_PLUGIN_PACKAGE_SIMPLE_HASH for plugins while we're still building stubs.
+
+        * wtf/Platform.h:
+
+2009-10-13  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        Refactor ENABLE_PLUGIN_PACKAGE_SIMPLE_HASH
+        https://bugs.webkit.org/show_bug.cgi?id=30278
+
+        Move the definition of ENABLE_PLUGIN_PACKAGE_SIMPLE_HASH
+        from the make system into common code.
+
+        * wtf/Platform.h:
+
+2009-10-13  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        ARM compiler does not understand reinterpret_cast<void*>
+        https://bugs.webkit.org/show_bug.cgi?id=29034
+
+        Change reinterpret_cast<void*> to regular C style (void*) cast 
+        for the ARM RVCT compiler.
+
+        * assembler/MacroAssemblerCodeRef.h:
+        (JSC::FunctionPtr::FunctionPtr): 
+        * jit/JITOpcodes.cpp: Cast to FunctionPtr first 
+           instead of directly casting to reinterpret_cast
+        * jit/JITStubCall.h: Ditto + change the type of m_stub
+          from void* to FunctionPtr.
+        (JSC::JITStubCall::JITStubCall): 
+        (JSC::JITStubCall::call):
+        * jit/JITStubs.cpp: Ditto.
+        (JSC::DEFINE_STUB_FUNCTION(EncodedJSValue, op_throw)):
+
+2009-10-11  Oliver Hunt  <oliver@apple.com>
+
+        Re-enable the JIT.
+
+        * wtf/Platform.h:
+
+2009-10-10  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        Support for String.trim(), String.trimLeft() and String.trimRight() methods
+        https://bugs.webkit.org/show_bug.cgi?id=26590
+
+        Implement trim, trimLeft, and trimRight
+
+        * runtime/StringPrototype.cpp:
+        (JSC::isTrimWhitespace):
+           Our normal string whitespace function does not include U+200B which
+           is needed for compatibility with mozilla's implementation of trim.
+           U+200B does not appear to be expected according to spec, however I am
+           choosing to be lax, and match mozilla behavior so have added this
+           exception.
+        (JSC::trimString):
+
+2009-10-09  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Eliminated some legacy bytecode weirdness.
+        
+        Use vPC[x] subscripting instead of ++vPC to access instruction operands.
+        This is simpler, and often more efficient.
+
+        To support this, and to remove use of hard-coded offsets in bytecode and
+        JIT code generation and dumping, calculate jump offsets from the beginning
+        of an instruction, rather than the middle or end.
+        
+        Also, use OPCODE_LENGTH instead of hard-coded constants for the sizes of
+        opcodes.
+        
+        SunSpider reports no change in JIT mode, and a 1.01x speedup in Interpreter
+        mode.
+
+        * bytecode/CodeBlock.cpp:
+        (JSC::printConditionalJump):
+        (JSC::CodeBlock::dump):
+        * bytecompiler/BytecodeGenerator.cpp:
+        (JSC::BytecodeGenerator::emitJump):
+        (JSC::BytecodeGenerator::emitJumpIfTrue):
+        (JSC::BytecodeGenerator::emitJumpIfFalse):
+        (JSC::BytecodeGenerator::emitJumpIfNotFunctionCall):
+        (JSC::BytecodeGenerator::emitJumpIfNotFunctionApply):
+        (JSC::BytecodeGenerator::emitComplexJumpScopes):
+        (JSC::BytecodeGenerator::emitJumpScopes):
+        (JSC::BytecodeGenerator::emitNextPropertyName):
+        (JSC::BytecodeGenerator::emitCatch):
+        (JSC::BytecodeGenerator::emitJumpSubroutine):
+        (JSC::prepareJumpTableForImmediateSwitch):
+        (JSC::prepareJumpTableForCharacterSwitch):
+        (JSC::prepareJumpTableForStringSwitch):
+        (JSC::BytecodeGenerator::endSwitch):
+        * bytecompiler/Label.h:
+        (JSC::Label::setLocation):
+        (JSC::Label::bind):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::resolve):
+        (JSC::Interpreter::resolveSkip):
+        (JSC::Interpreter::resolveGlobal):
+        (JSC::Interpreter::resolveBase):
+        (JSC::Interpreter::resolveBaseAndProperty):
+        (JSC::Interpreter::createExceptionScope):
+        (JSC::Interpreter::privateExecute):
+        * interpreter/Interpreter.h:
+        * jit/JIT.cpp:
+        (JSC::JIT::privateCompile):
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::emit_op_jnless):
+        (JSC::JIT::emitSlow_op_jnless):
+        (JSC::JIT::emit_op_jnlesseq):
+        (JSC::JIT::emitSlow_op_jnlesseq):
+        (JSC::JIT::emitBinaryDoubleOp):
+        * jit/JITOpcodes.cpp:
+        (JSC::JIT::emit_op_jmp):
+        (JSC::JIT::emit_op_loop):
+        (JSC::JIT::emit_op_loop_if_less):
+        (JSC::JIT::emitSlow_op_loop_if_less):
+        (JSC::JIT::emit_op_loop_if_lesseq):
+        (JSC::JIT::emitSlow_op_loop_if_lesseq):
+        (JSC::JIT::emit_op_loop_if_true):
+        (JSC::JIT::emitSlow_op_loop_if_true):
+        (JSC::JIT::emit_op_jfalse):
+        (JSC::JIT::emitSlow_op_jfalse):
+        (JSC::JIT::emit_op_jtrue):
+        (JSC::JIT::emitSlow_op_jtrue):
+        (JSC::JIT::emit_op_jeq_null):
+        (JSC::JIT::emit_op_jneq_null):
+        (JSC::JIT::emit_op_jneq_ptr):
+        (JSC::JIT::emit_op_jsr):
+        (JSC::JIT::emit_op_next_pname):
+        (JSC::JIT::emit_op_jmp_scopes):
+
+2009-10-09  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Migrated some code that didn't belong out of Structure.
+        
+        SunSpider says maybe 1.03x faster.
+
+        * runtime/JSCell.h: Nixed Structure::markAggregate, and made marking of
+        a Structure's prototype the direct responsility of the object using it.
+        (Giving Structure a mark function was misleading because it implied that
+        all live structures get marked during GC, when they don't.)
+        
+        * runtime/JSGlobalObject.cpp:
+        (JSC::markIfNeeded):
+        (JSC::JSGlobalObject::markChildren): Added code to mark prototypes stored
+        on the global object. Maybe this wasn't necessary, but now we don't have
+        to wonder.
+
+        * runtime/JSObject.cpp:
+        (JSC::JSObject::getPropertyNames):
+        (JSC::JSObject::getOwnPropertyNames):
+        (JSC::JSObject::getEnumerableNamesFromClassInfoTable):
+        * runtime/JSObject.h:
+        (JSC::JSObject::markChildrenDirect):
+        * runtime/PropertyNameArray.h:
+        * runtime/Structure.cpp:
+        * runtime/Structure.h:
+        (JSC::Structure::setEnumerationCache):
+        (JSC::Structure::enumerationCache): Moved property name gathering code
+        from Structure to JSObject because having a Structure iterate its JSObject
+        was a layering violation. A JSObject is implemented using a Structure; not
+        the other way around.
+
+2009-10-09  Mark Rowe  <mrowe@apple.com>
+
+        Attempt to fix the GTK release build.
+
+        * GNUmakefile.am: Include Grammar.cpp in release builds now that
+        AllInOneFile.cpp is gone.
+
+2009-10-09  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Rubber-stamped by Eric Seidel.
+
+        Add ARM JIT support for Gtk port (disabled by default)
+        https://bugs.webkit.org/show_bug.cgi?id=30228
+
+        * GNUmakefile.am:
+
+2009-10-08  Geoffrey Garen  <ggaren@apple.com>
+
+        Tiger build fix: added a few more variable initializations.
+
+        * runtime/StringPrototype.cpp:
+        (JSC::stringProtoFuncReplace):
+        (JSC::stringProtoFuncSearch):
+
+2009-10-08  Geoffrey Garen  <ggaren@apple.com>
+
+        Qt build fix: added missing #include.
+
+        * jsc.cpp:
+
+2009-10-08  Geoffrey Garen  <ggaren@apple.com>
+
+        Tiger build fix: initialize variable whose initialization the compiler
+        can't otherwise figure out.
+
+        * runtime/RegExpObject.cpp:
+        (JSC::RegExpObject::match):
+
+2009-10-08  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: updated exports.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+
+2009-10-08  Geoffrey Garen  <ggaren@apple.com>
+
+        Tiger build fix: fixed file name case.
+
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+
+2009-10-08  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Maciej Stachowiak.
+
+        At long last, I pronounce the death of AllInOneFile.cpp.
+        
+        SunSpider reports a 1.01x speedup.
+
+        * AllInOneFile.cpp: Removed.
+        * GNUmakefile.am:
+        * JavaScriptCore.exp:
+        * JavaScriptCore.gypi:
+        * JavaScriptCore.xcodeproj/project.pbxproj: Added missing project files
+        to compilation stages.
+
+        * parser/Grammar.y:
+        * parser/Lexer.cpp:
+        * parser/Lexer.h:
+        (JSC::jscyylex):
+        * runtime/ArrayConstructor.cpp:
+        (JSC::constructArrayWithSizeQuirk):
+        * runtime/Collector.h:
+        * runtime/JSCell.cpp:
+        (JSC::JSCell::operator new):
+        * runtime/JSCell.h:
+        (JSC::JSCell::operator new):
+        * runtime/JSGlobalObject.cpp:
+        (JSC::JSGlobalObject::operator new):
+        * runtime/JSNumberCell.h:
+        (JSC::JSNumberCell::operator new):
+        * runtime/JSString.cpp:
+        * runtime/JSString.h:
+        (JSC::jsString):
+        (JSC::jsSubstring):
+        (JSC::jsOwnedString):
+        * runtime/RegExpConstructor.cpp:
+        * runtime/RegExpConstructor.h:
+        (JSC::RegExpConstructorPrivate::RegExpConstructorPrivate):
+        (JSC::RegExpConstructorPrivate::lastOvector):
+        (JSC::RegExpConstructorPrivate::tempOvector):
+        (JSC::RegExpConstructorPrivate::changeLastOvector):
+        (JSC::RegExpConstructor::performMatch):
+        * runtime/StringPrototype.cpp:
+        (JSC::stringProtoFuncMatch):
+        * yarr/RegexJIT.cpp:
+        * yarr/RegexJIT.h:
+        (JSC::Yarr::executeRegex): Inlined a few things that Shark said
+        were hot, on the presumption that AllInOneFile.cpp used to inline them
+        automatically.
+
+2009-10-08  Zoltan Herczeg  <zherczeg@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        Fix for JIT'ed op_call instructions (evals, constructs, etc.)
+        when !ENABLE(JIT_OPTIMIZE_CALL) && USE(JSVALUE32_64)
+
+        https://bugs.webkit.org/show_bug.cgi?id=30201
+
+        * jit/JITCall.cpp:
+        (JSC::JIT::compileOpCall):
+
+2009-10-07  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: removed no longer exported symbol.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+
+2009-10-07  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Oliver Hunt.
+
+        Fixed <rdar://problem/5751979> Database code takes JSLock on secondary
+        thread, permanently slowing down JavaScript
+        
+        Removed the optional lock from Heap::protect, Heap::unprotect, and friends,
+        since WebCore no longer uses it.
+
+        * JavaScriptCore.exp:
+        * runtime/Collector.cpp:
+        (JSC::Heap::protect):
+        (JSC::Heap::unprotect):
+        (JSC::Heap::markProtectedObjects):
+        (JSC::Heap::protectedGlobalObjectCount):
+        (JSC::Heap::protectedObjectCount):
+        (JSC::Heap::protectedObjectTypeCounts):
+        * runtime/Collector.h:
+
+2009-10-07  Zoltan Horvath  <zoltan@webkit.org>
+
+        Reviewed by Darin Adler.
+
+        Allow custom memory allocation control for JavaScriptCore's IdentifierArena
+        https://bugs.webkit.org/show_bug.cgi?id=30158
+
+        Inherits IdentifierArena class from FastAllocBase because it has been
+        instantiated by 'new' in JavaScriptCore/parser/ParserArena.cpp:36.
+
+        * parser/ParserArena.h:
+
+2009-10-07  Adam Roben  <aroben@apple.com>
+
+        Export DateInstance::info in a way that works on Windows
+
+        Fixes <http://webkit.org/b/30171>
+        fast/dom/Window/window-postmessage-clone.html fails on Windows
+
+        Reviewed by Anders Carlsson.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+        Removed the export of DateInstance::info from here.
+
+        * runtime/DateInstance.h: Use JS_EXPORTDATA to export
+        DateInstance::info, which is the required way of exporting data on
+        Windows.
+
+2009-10-07  Jørgen Lind  <jorgen.lind@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        When enabling or disabling the JIT through .qmake.cache, make sure
+        to also toggle ENABLE_YARR_JIT.
+
+        * JavaScriptCore.pri:
+
+2009-10-06  Priit Laes  <plaes@plaes.org>
+
+        Reviewed by Gavin Barraclough.
+
+        Linking fails with "relocation R_X86_64_PC32 against symbol
+        `cti_vm_throw'"
+        https://bugs.webkit.org/show_bug.cgi?id=28422
+
+        * jit/JITStubs.cpp:
+        Mark cti_vm_throw symbol as PLT-indirect symbol, so it doesn't end up
+        in text segment causing relocation errors on amd64 architecture.
+        Introduced new define SYMBOL_STRING_RELOCATION for such symbols.
+
+2009-10-06  Oliver Hunt  <oliver@apple.com>
+
+        Windows linking fix
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+
+2009-10-06  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by NOBODY (build fix).
+
+        Windows build fix.
+
+        * runtime/DateInstance.cpp:
+
+2009-10-05  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        It should be possible to post (clone) built-in JS objects to Workers
+        https://bugs.webkit.org/show_bug.cgi?id=22878
+
+        Expose helpers to throw correct exceptions during object graph walk
+        used for cloning and add a helper function to create Date instances
+        without going through the JS Date constructor function.
+
+        * JavaScriptCore.exp:
+        * JavaScriptCore.xcodeproj/project.pbxproj:
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::DateInstance):
+        * runtime/DateInstance.h:
+        * runtime/ExceptionHelpers.cpp:
+        (JSC::createTypeError):
+        * runtime/ExceptionHelpers.h:
+
+2009-10-06  David Levin  <levin@chromium.org>
+
+        Reviewed by Oliver Hunt.
+
+        StringImpl needs a method to get an instance for another thread which doesn't copy the underlying buffer.
+        https://bugs.webkit.org/show_bug.cgi?id=30095
+
+        * wtf/CrossThreadRefCounted.h:
+        Removed an unused function and assert improvement.
+        (WTF::CrossThreadRefCounted::isOwnedByCurrentThread): Moved out common code from asserts.
+        (WTF::CrossThreadRefCounted::ref): Changed assert to use the common method.
+        (WTF::CrossThreadRefCounted::deref): Changed assert to use the common method.
+        (WTF::CrossThreadRefCounted::crossThreadCopy): Since this includes a potentially
+        non-threadsafe operation, add an assert that the class is owned by the current thread.
+
+2009-10-05  Kevin Ollivier  <kevino@theolliviers.com>
+
+        wx build fix. Add Symbian files to the list of excludes.
+
+        * wscript:
+
+2009-10-05  Jocelyn Turcotte  <jocelyn.turcotte@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Remove precompiled header from JavaScriptCore compilation to
+        prevent qmake warning during autonomous compilation.
+        https://bugs.webkit.org/show_bug.cgi?id=30069
+
+        * JavaScriptCore.pro:
+
 2009-10-02  Geoffrey Garen  <ggaren@apple.com>
 
         Reviewed by Sam Weinig.
@@ -88,6 +7495,62 @@
         (JSC::JSValue::operator bool): Test for the empty value tag, instead
         of testing for the cell tag with a 0 payload.
 
+2009-10-02  Steve Falkenburg  <sfalken@apple.com>
+
+        Reviewed by Mark Rowe.
+
+        <https://bugs.webkit.org/show_bug.cgi?id=29989>
+        Safari version number shouldn't be exposed in WebKit code
+        
+        For a WebKit version of 532.3.4:
+        Product version is: 5.32.3.4 (was 4.0.3.0)
+        File version is: 5.32.3.4 (was 4.532.3.4)
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.rc:
+
+2009-10-02  Tor Arne Vestbø  <tor.arne.vestbo@nokia.com>
+
+        Rubber-stamped by Simon Hausmann.
+
+        Fix the Qt on Mac OS X build.
+
+        * wtf/FastMalloc.cpp:
+
+2009-10-02  Jørgen Lind  <jorgen.lind@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        Allow enabling and disabling of the JIT through a qmake variable.
+
+        Qt's configure may set this variable through .qmake.cache if a
+        commandline option is given and/or the compile test for hwcap.h
+        failed/succeeded.
+
+        * JavaScriptCore.pri:
+
+2009-10-01  Mark Rowe  <mrowe@apple.com>
+
+        Fix the Tiger build.  Don't unconditionally enable 3D canvas as it is not supported on Tiger.
+
+        * Configurations/FeatureDefines.xcconfig:
+
+2009-10-01  Yongjun Zhang  <yongjun.zhang@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        https://bugs.webkit.org/show_bug.cgi?id=29187
+
+        Don't inline ~ListRefPtr() to work around winscw compiler forward declaration
+        bug regarding templated classes.
+
+        The compiler bug is reported at:
+        https://xdabug001.ext.nokia.com/bugzilla/show_bug.cgi?id=9812
+
+        The change will be reverted when the above bug is fixed in winscw compiler.
+
+        * wtf/ListRefPtr.h:
+        (WTF::::~ListRefPtr):
+
 2009-10-01  Zoltan Horvath  <zoltan@webkit.org>
 
         Reviewed by Simon Hausmann.
@@ -109,6 +7572,25 @@
         (WTF::sleep):
         * wtf/FastMalloc.h:
 
+2009-09-30  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by George Staikos.
+
+        Defines two pseudo-platforms for ARM and Thumb-2 instruction set.
+        https://bugs.webkit.org/show_bug.cgi?id=29122
+
+        Introduces WTF_PLATFORM_ARM_TRADITIONAL and WTF_PLATFORM_ARM_THUMB2
+        macros on ARM platforms. The PLATFORM(ARM_THUMB2) should be used
+        when Thumb-2 instruction set is the required target. The
+        PLATFORM(ARM_TRADITIONAL) is for generic ARM instruction set. In
+        case where the code is common the PLATFORM(ARM) have to be used.
+
+        Modified by George Wright  <gwright@rim.com> to correctly work
+        with the RVCT-defined __TARGET_ARCH_ARM and __TARGET_ARCH_THUMB
+        compiler macros, as well as adding readability changes.
+
+        * wtf/Platform.h:
+
 2009-09-30  Oliver Hunt  <oliver@apple.com>
 
         Reviewed by Geoff Garen.
@@ -143,12 +7625,106 @@
 
         Reviewed by Simon Hausmann.
 
+        Reduce heap size on Symbian from 64MB to 8MB.
+
+        This is not a perfect fix, it requires more fine tuning.
+        But this makes it possible again to debug in the emulator,
+        which is more important in order to be able to fix other
+        run-time issues.
+
+        * runtime/Collector.h:
+
+2009-09-30  Janne Koskinen  <janne.p.koskinen@digia.com> 
+
+        Reviewed by Simon Hausmann.
+
         Fix CRASH() macro for Symbian build.
 
         * wtf/Assertions.h: Added missing }
 
 2009-09-29  Geoffrey Garen  <ggaren@apple.com>
 
+        Reviewed by Gavin Barraclough.
+
+        Inlined a few math operations.
+        
+        ~1% SunSpider speedup.
+
+        * jit/JIT.h:
+        * jit/JITArithmetic.cpp:
+        (JSC::JIT::compileBinaryArithOpSlowCase):
+        (JSC::JIT::emitSlow_op_add):
+        (JSC::JIT::emitSlow_op_mul):
+        (JSC::JIT::emit_op_sub):
+        (JSC::JIT::emitSlow_op_sub): Don't take a stub call when operating on
+        a constant int and a double.
+
+2009-09-28  Oliver Hunt  <oliver@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Tidy up codeblock sampler
+        https://bugs.webkit.org/show_bug.cgi?id=29836
+
+        Some rather simple refactoring of codeblock sampler so that
+        it's easier for us to use it to find problems in non-jsc
+        environments
+
+        * JavaScriptCore.exp:
+        * bytecode/SamplingTool.h:
+        * debugger/Debugger.cpp:
+        (JSC::evaluateInGlobalCallFrame):
+        * debugger/DebuggerCallFrame.cpp:
+        (JSC::DebuggerCallFrame::evaluate):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::Interpreter):
+        (JSC::Interpreter::execute):
+        (JSC::Interpreter::privateExecute):
+        (JSC::Interpreter::enableSampler):
+        (JSC::Interpreter::dumpSampleData):
+        (JSC::Interpreter::startSampling):
+        (JSC::Interpreter::stopSampling):
+        * interpreter/Interpreter.h:
+        (JSC::Interpreter::sampler):
+        * jit/JIT.h:
+        * jsc.cpp:
+        (runWithScripts):
+        * runtime/Completion.cpp:
+        (JSC::checkSyntax):
+        (JSC::evaluate):
+        * runtime/Executable.h:
+        (JSC::EvalExecutable::EvalExecutable):
+        (JSC::ProgramExecutable::create):
+        (JSC::ProgramExecutable::ProgramExecutable):
+        * runtime/JSGlobalData.cpp:
+        (JSC::JSGlobalData::startSampling):
+        (JSC::JSGlobalData::stopSampling):
+        (JSC::JSGlobalData::dumpSampleData):
+        * runtime/JSGlobalData.h:
+        * runtime/JSGlobalObjectFunctions.cpp:
+        (JSC::globalFuncEval):
+
+2009-09-29  Jeremy Orlow  <jorlow@chromium.org>
+
+        Reviewed by Dimitri Glazkov.
+
+        Add GYP generated files to svn:ignore
+        https://bugs.webkit.org/show_bug.cgi?id=29895
+
+        The following files are generated by JavaScriptCore's GYP file and should be ignored:
+
+        pcre.mk
+        wtf.scons
+        wtf.mk
+        SConstruct
+        wtf_config.scons
+        wtf_config.mk
+        pcre.scons
+
+        * JavaScriptCore.gyp: Changed property svn:ignore.
+
+2009-09-29  Geoffrey Garen  <ggaren@apple.com>
+
         Reviewed by Sam Weinig.
 
         Standardized an optimization for adding non-numbers.
@@ -159,6 +7735,32 @@
         (JSC::JIT::emit_op_add):
         (JSC::JIT::emitSlow_op_add):
 
+2009-09-29  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: export a new symbol.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+
+2009-09-28  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Removed virtual destructor from JSGlobalObjectData to eliminate pointer
+        fix-ups when accessing JSGlobalObject::d.
+        
+        Replaced with an explicit destructor function pointer.
+        
+        6% speedup on bench-alloc-nonretained.js.
+
+        * JavaScriptCore.exp:
+        * runtime/JSGlobalObject.cpp:
+        (JSC::JSGlobalObject::~JSGlobalObject):
+        (JSC::JSGlobalObject::destroyJSGlobalObjectData):
+        * runtime/JSGlobalObject.h:
+        (JSC::JSGlobalObject::JSGlobalObjectData::JSGlobalObjectData):
+        (JSC::JSGlobalObject::JSGlobalObject):
+
 2009-09-29  Janne Koskinen  <janne.p.koskinen@digia.com>
 
         Reviewed by David Kilzer.
@@ -187,6 +7789,12 @@
 
 2009-09-28  Mark Rowe  <mrowe@apple.com>
 
+        Fix the PowerPC build.
+
+        * JavaScriptCore.exp:
+
+2009-09-28  Mark Rowe  <mrowe@apple.com>
+
         Reviewed by Gavin Barraclough.
 
         <rdar://problem/7195704> JavaScriptCore fails to mark registers when built for x86_64 using LLVM GCC.
@@ -195,22 +7803,175 @@
         (JSC::Heap::markCurrentThreadConservatively): Force jmp_buf to use the appropriate alignment for a pointer
         to ensure that we correctly interpret the contents of registers during marking.
 
-2009-09-29  Geoffrey Garen  <ggaren@apple.com>
+2009-09-28  Geoffrey Garen  <ggaren@apple.com>
 
-        Reviewed by Gavin Barraclough.
+        Windows build fix: added new exports.
 
-        Inlined a few math operations.
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+
+2009-09-28  Geoffrey Garen  <ggaren@apple.com>
+
+        Windows build fix: removed exports that no longer exist.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+
+2009-09-28  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Darin Adler.
+
+        NotNullPassRefPtr: smart pointer optimized for passing references that are not null
+        https://bugs.webkit.org/show_bug.cgi?id=29822
         
-        ~1% SunSpider speedup.
+        Added NotNullPassRefPtr, and deployed it in all places that initialize
+        JavaScript objects.
+        
+        2.2% speedup on bench-allocate-nonretained.js.
 
-        * jit/JIT.h:
-        * jit/JITArithmetic.cpp:
-        (JSC::JIT::compileBinaryArithOpSlowCase):
-        (JSC::JIT::emitSlow_op_add):
-        (JSC::JIT::emitSlow_op_mul):
-        (JSC::JIT::emit_op_sub):
-        (JSC::JIT::emitSlow_op_sub): Don't take a stub call when operating on
-        a constant int and a double.
+        * API/JSCallbackConstructor.cpp:
+        (JSC::JSCallbackConstructor::JSCallbackConstructor):
+        * API/JSCallbackConstructor.h:
+        * API/JSCallbackObject.h:
+        * API/JSCallbackObjectFunctions.h:
+        (JSC::JSCallbackObject::JSCallbackObject):
+        * JavaScriptCore.exp:
+        * bytecode/CodeBlock.h:
+        (JSC::CodeBlock::addFunctionDecl):
+        (JSC::CodeBlock::addFunctionExpr):
+        * runtime/ArrayConstructor.cpp:
+        (JSC::ArrayConstructor::ArrayConstructor):
+        * runtime/ArrayConstructor.h:
+        * runtime/ArrayPrototype.cpp:
+        (JSC::ArrayPrototype::ArrayPrototype):
+        * runtime/ArrayPrototype.h:
+        * runtime/BooleanConstructor.cpp:
+        (JSC::BooleanConstructor::BooleanConstructor):
+        * runtime/BooleanConstructor.h:
+        * runtime/BooleanObject.cpp:
+        (JSC::BooleanObject::BooleanObject):
+        * runtime/BooleanObject.h:
+        * runtime/BooleanPrototype.cpp:
+        (JSC::BooleanPrototype::BooleanPrototype):
+        * runtime/BooleanPrototype.h:
+        * runtime/DateConstructor.cpp:
+        (JSC::DateConstructor::DateConstructor):
+        * runtime/DateConstructor.h:
+        * runtime/DateInstance.cpp:
+        (JSC::DateInstance::DateInstance):
+        * runtime/DateInstance.h:
+        * runtime/DatePrototype.cpp:
+        (JSC::DatePrototype::DatePrototype):
+        * runtime/DatePrototype.h:
+        * runtime/ErrorConstructor.cpp:
+        (JSC::ErrorConstructor::ErrorConstructor):
+        * runtime/ErrorConstructor.h:
+        * runtime/ErrorInstance.cpp:
+        (JSC::ErrorInstance::ErrorInstance):
+        * runtime/ErrorInstance.h:
+        * runtime/ErrorPrototype.cpp:
+        (JSC::ErrorPrototype::ErrorPrototype):
+        * runtime/ErrorPrototype.h:
+        * runtime/FunctionConstructor.cpp:
+        (JSC::FunctionConstructor::FunctionConstructor):
+        * runtime/FunctionConstructor.h:
+        * runtime/FunctionPrototype.cpp:
+        (JSC::FunctionPrototype::FunctionPrototype):
+        * runtime/FunctionPrototype.h:
+        * runtime/GlobalEvalFunction.cpp:
+        (JSC::GlobalEvalFunction::GlobalEvalFunction):
+        * runtime/GlobalEvalFunction.h:
+        * runtime/InternalFunction.cpp:
+        (JSC::InternalFunction::InternalFunction):
+        * runtime/InternalFunction.h:
+        (JSC::InternalFunction::InternalFunction):
+        * runtime/JSActivation.cpp:
+        (JSC::JSActivation::JSActivation):
+        * runtime/JSActivation.h:
+        (JSC::JSActivation::JSActivationData::JSActivationData):
+        * runtime/JSArray.cpp:
+        (JSC::JSArray::JSArray):
+        * runtime/JSArray.h:
+        * runtime/JSByteArray.cpp:
+        (JSC::JSByteArray::JSByteArray):
+        * runtime/JSByteArray.h:
+        * runtime/JSFunction.cpp:
+        (JSC::JSFunction::JSFunction):
+        * runtime/JSFunction.h:
+        * runtime/JSGlobalObject.h:
+        (JSC::JSGlobalObject::JSGlobalObject):
+        * runtime/JSONObject.h:
+        (JSC::JSONObject::JSONObject):
+        * runtime/JSObject.h:
+        (JSC::JSObject::JSObject):
+        (JSC::JSObject::setStructure):
+        * runtime/JSVariableObject.h:
+        (JSC::JSVariableObject::JSVariableObject):
+        * runtime/JSWrapperObject.h:
+        (JSC::JSWrapperObject::JSWrapperObject):
+        * runtime/MathObject.cpp:
+        (JSC::MathObject::MathObject):
+        * runtime/MathObject.h:
+        * runtime/NativeErrorConstructor.cpp:
+        (JSC::NativeErrorConstructor::NativeErrorConstructor):
+        * runtime/NativeErrorConstructor.h:
+        * runtime/NativeErrorPrototype.cpp:
+        (JSC::NativeErrorPrototype::NativeErrorPrototype):
+        * runtime/NativeErrorPrototype.h:
+        * runtime/NumberConstructor.cpp:
+        (JSC::NumberConstructor::NumberConstructor):
+        * runtime/NumberConstructor.h:
+        * runtime/NumberObject.cpp:
+        (JSC::NumberObject::NumberObject):
+        * runtime/NumberObject.h:
+        * runtime/NumberPrototype.cpp:
+        (JSC::NumberPrototype::NumberPrototype):
+        * runtime/NumberPrototype.h:
+        * runtime/ObjectConstructor.cpp:
+        (JSC::ObjectConstructor::ObjectConstructor):
+        * runtime/ObjectConstructor.h:
+        * runtime/ObjectPrototype.cpp:
+        (JSC::ObjectPrototype::ObjectPrototype):
+        * runtime/ObjectPrototype.h:
+        * runtime/PropertyNameArray.h:
+        (JSC::PropertyNameArrayData::setCachedPrototypeChain):
+        * runtime/PrototypeFunction.cpp:
+        (JSC::PrototypeFunction::PrototypeFunction):
+        * runtime/PrototypeFunction.h:
+        * runtime/RegExpConstructor.cpp:
+        (JSC::RegExpConstructor::RegExpConstructor):
+        * runtime/RegExpConstructor.h:
+        * runtime/RegExpObject.cpp:
+        (JSC::RegExpObject::RegExpObject):
+        * runtime/RegExpObject.h:
+        (JSC::RegExpObject::RegExpObjectData::RegExpObjectData):
+        * runtime/RegExpPrototype.cpp:
+        (JSC::RegExpPrototype::RegExpPrototype):
+        * runtime/RegExpPrototype.h:
+        * runtime/StringConstructor.cpp:
+        (JSC::StringConstructor::StringConstructor):
+        * runtime/StringConstructor.h:
+        * runtime/StringObject.cpp:
+        (JSC::StringObject::StringObject):
+        * runtime/StringObject.h:
+        * runtime/StringObjectThatMasqueradesAsUndefined.h:
+        (JSC::StringObjectThatMasqueradesAsUndefined::StringObjectThatMasqueradesAsUndefined):
+        * runtime/StringPrototype.cpp:
+        (JSC::StringPrototype::StringPrototype):
+        * runtime/StringPrototype.h:
+        * wtf/PassRefPtr.h:
+        (WTF::NotNullPassRefPtr::NotNullPassRefPtr):
+        (WTF::NotNullPassRefPtr::~NotNullPassRefPtr):
+        (WTF::NotNullPassRefPtr::get):
+        (WTF::NotNullPassRefPtr::clear):
+        (WTF::NotNullPassRefPtr::releaseRef):
+        (WTF::NotNullPassRefPtr::operator*):
+        (WTF::NotNullPassRefPtr::operator->):
+        (WTF::NotNullPassRefPtr::operator!):
+        (WTF::NotNullPassRefPtr::operator UnspecifiedBoolType):
+        * wtf/RefPtr.h:
+        (WTF::RefPtr::RefPtr):
+        (WTF::operator==):
 
 2009-09-28  Oliver Hunt  <oliver@apple.com>
 
@@ -249,28 +8010,6 @@
 
         * wtf/Platform.h: Add a WTF_USE_QXMLQUERY #define.
 
-2009-09-28  Yongjun Zhang  <yongjun.zhang@nokia.com>
-
-        Reviewed by Eric Seidel.
-
-        https://bugs.webkit.org/show_bug.cgi?id=28054
-       
-        Use derefInNotNull() to work around winscw compiler forward declaration bug
-        regarding templated classes. 
-
-        The compiler bug is reported at 
-        https://xdabug001.ext.nokia.com/bugzilla/show_bug.cgi?id=9812.
-        
-        The change should be reverted when the above bug is fixed in winscw compiler. 
-
-        Add parenthesis around (RefPtr::*UnspecifiedBoolType) to make winscw compiler
-        work with the default UnSpecifiedBoolType() operator, which removes the winscw hack.
-
-        * wtf/RefPtr.h:
-        (WTF::RefPtr::~RefPtr):
-        (WTF::RefPtr::clear):
-        (WTF::RefPtr::operator UnspecifiedBoolType):
-
 2009-09-28  Gabor Loki  <loki@inf.u-szeged.hu>
 
         Reviewed by Simon Hausmann.
@@ -351,6 +8090,81 @@
         * yarr/RegexJIT.cpp:
         (JSC::Yarr::RegexGenerator::generatePatternCharacterPair):
 
+2009-09-25  Jeremy Orlow  <jorlow@chromium.org>
+
+        This is breaking Chromium try bots, so I'm counting this as a build fix.
+
+        Add more svn:ignore exceptions.  On different platforms, these files are
+        generated with different case for JavaScriptCore.  Also there are some
+        wtf project files that get built apparently.
+
+        * JavaScriptCore.gyp: Changed property svn:ignore.
+
+2009-09-25  Ada Chan  <adachan@apple.com>
+
+        Build fix.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore_debug.def:
+
+2009-09-25  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Darin Adler.
+
+        Inlined some object creation code, including lexicalGlobalObject access
+        https://bugs.webkit.org/show_bug.cgi?id=29750
+        
+        SunSpider says 0.5% faster.
+        
+        0.8% speedup on bench-alloc-nonretained.js.
+        2.5% speedup on v8-splay.js.
+
+        * interpreter/CachedCall.h:
+        (JSC::CachedCall::CachedCall):
+        * interpreter/CallFrame.h:
+        (JSC::ExecState::lexicalGlobalObject):
+        (JSC::ExecState::globalThisValue):
+        * interpreter/Interpreter.cpp:
+        (JSC::Interpreter::dumpRegisters):
+        (JSC::Interpreter::execute):
+        (JSC::Interpreter::privateExecute):
+        * jit/JITStubs.cpp:
+        (JSC::DEFINE_STUB_FUNCTION):
+        * runtime/FunctionConstructor.cpp:
+        (JSC::constructFunction):
+        * runtime/ScopeChain.cpp:
+        (JSC::ScopeChainNode::print):
+        * runtime/ScopeChain.h:
+        (JSC::ScopeChainNode::ScopeChainNode):
+        (JSC::ScopeChainNode::~ScopeChainNode):
+        (JSC::ScopeChainNode::push):
+        (JSC::ScopeChain::ScopeChain):
+        (JSC::ScopeChain::globalObject): Added a globalObject data member to ScopeChainNode.
+        Replaced accessor function for globalObject() with data member. Replaced
+        globalThisObject() accessor with direct access to globalThis, to match.
+
+        * runtime/JSGlobalObject.cpp:
+        (JSC::JSGlobalObject::init):
+        * runtime/JSGlobalObject.h: Inlined array and object construction.
+
+2009-09-25  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Add ARM version detection rules for Symbian
+        https://bugs.webkit.org/show_bug.cgi?id=29715
+
+        * wtf/Platform.h:
+
+2009-09-24  Xan Lopez  <xlopez@igalia.com>
+
+        Reviewed by Mark "Do It!" Rowe.
+
+        Some GCC versions don't like C++-style comments in preprocessor
+        directives, change to C-style to shut them up.
+
+        * wtf/Platform.h:
+
 2009-09-24  Oliver Hunt  <oliver@apple.com>
 
         Reviewed by Gavin Barraclough.
@@ -375,6 +8189,33 @@
         (JSC::JIT::emitLoadInt32ToDouble):
         (JSC::JIT::emitJumpSlowCaseIfNotImmediateNumber):
 
+2009-09-24  Jeremy Orlow  <jorlow@chromium.org>
+
+        Reviewed by Dimitri Glazkov.
+
+        Add GYP generated files to svn:ignore
+        https://bugs.webkit.org/show_bug.cgi?id=29724
+
+        Adding the following files to the svn:ignore list (all in the
+        JavaScriptCore/JavaScriptCore.gyp directory)
+
+        JavaScriptCore.xcodeproj
+        JavaScriptCore.sln
+        JavaScriptCore.vcproj
+        JavaScriptCore_Debug.rules
+        JavaScriptCore_Release.rules
+        JavaScriptCore_Release - no tcmalloc.rules
+        JavaScriptCore_Purify.rules
+        JavaScriptCore.mk
+        JavaScriptCore_Debug_rules.mk
+        JavaScriptCore_Release_rules.mk
+        JavaScriptCore_Release - no tcmalloc_rules.mk
+        JavaScriptCore_Purify_rules.mk
+        JavaScriptCore.scons
+        JavaScriptCore_main.scons
+
+        * JavaScriptCore.gyp: Changed property svn:ignore.
+
 2009-09-24  Yong Li  <yong.li@torchmobile.com>
 
         Reviewed by Adam Barth.
@@ -391,17 +8232,6 @@
 
 2009-09-24  Mark Rowe  <mrowe@apple.com>
 
-        Reviewed by Gavin Barraclough.
-
-        Fix FastMalloc to build with assertions enabled.
-
-        * wtf/FastMalloc.cpp:
-        (WTF::TCMalloc_Central_FreeList::ReleaseToSpans):
-        * wtf/TCSpinLock.h:
-        (TCMalloc_SpinLock::IsHeld):
-
-2009-09-24  Mark Rowe  <mrowe@apple.com>
-
         Reviewed by Sam Weinig.
 
         <rdar://problem/7215058> FastMalloc scavenging thread should be named
@@ -414,12 +8244,87 @@
 
 2009-09-24  Geoffrey Garen  <ggaren@apple.com>
 
+        Reviewed by Sam Weinig.
+
+        Renamed clear to removeAll, as suggested by Darin Adler.
+
+        * wtf/HashCountedSet.h:
+        (WTF::::removeAll):
+
+2009-09-24  Mark Rowe  <mrowe@apple.com>
+
+        Reviewed by Gavin Barraclough.
+
+        Fix FastMalloc to build with assertions enabled.
+
+        * wtf/FastMalloc.cpp:
+        (WTF::TCMalloc_Central_FreeList::ReleaseToSpans):
+        * wtf/TCSpinLock.h:
+        (TCMalloc_SpinLock::IsHeld):
+
+2009-09-24  Geoffrey Garen  <ggaren@apple.com>
+
         Suggested by Darin Adler.
 
         Removed some unnecessary parameter names.
 
         * wtf/HashCountedSet.h:
 
+2009-09-24  Janne Koskinen  <janne.p.koskinen@digia.com>
+
+        Reviewed by Simon Hausmann.
+
+        On Windows JSChar is typedef'ed to wchar_t.
+
+        When building with WINSCW for Symbian we need to do the
+        same typedef.
+
+        * API/JSStringRef.h:
+
+2009-09-23  Geoffrey Garen  <ggaren@apple.com>
+
+        A piece of my last patch that I forgot.
+
+        * wtf/HashCountedSet.h:
+        (WTF::::clear): Added HashCountedSet::clear.
+
+2009-09-24  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Gavin Barraclough.
+
+        Avoid __clear_cache built-in function if DISABLE_BUILTIN_CLEAR_CACHE define is set
+        https://bugs.webkit.org/show_bug.cgi?id=28886
+
+        There are some GCC packages (for example GCC-2006q3 from CodeSourcery)
+        which contain __clear_cache built-in function only for C while the C++
+        version of __clear_cache is missing on ARM architectures.
+
+        Fixed a small bug in the inline assembly of cacheFlush function on
+        ARM_TRADITIONAL.
+
+        * jit/ExecutableAllocator.h:
+        (JSC::ExecutableAllocator::cacheFlush):
+
+2009-09-23  Geoffrey Garen  <ggaren@apple.com>
+
+        Reviewed by Sam Weinig.
+
+        Added the ability to swap vectors with inline capacities, so you can
+        store a vector with inline capacity in a hash table.
+
+        * wtf/Vector.h:
+        (WTF::swap):
+        (WTF::VectorBuffer::swap):
+
+2009-09-23  David Kilzer  <ddkilzer@apple.com>
+
+        Move definition of USE(PLUGIN_HOST_PROCESS) from WebKitPrefix.h to Platform.h
+
+        Reviewed by Mark Rowe.
+
+        * wtf/Platform.h: Define WTF_USE_PLUGIN_HOST_PROCESS to 1 when
+        building on 64-bit SnowLeopard.  Define to 0 elsewhere.
+
 2009-09-22  Oliver Hunt  <oliver@apple.com>
 
         Reviewed by Geoff Garen.
@@ -474,71 +8379,84 @@
 
         * wtf/Forward.h: Added PassOwnPtr.
 
-2009-09-22  Simon Hausmann  <simon.hausmann@nokia.com>
+2009-09-22  Yaar Schnitman  <yaar@chromium.org>
 
-        Unreviewed build fix for Windows CE < 5
+        Reviewed by David Levin.
 
-        Define WINCEBASIC to disable the IsDebuggerPresent() code in
-        wtf/Assertions.cpp.
+        Ported chromium.org's javascriptcore.gyp for the webkit chromium port.
 
-        * JavaScriptCore.pri:
+        https://bugs.webkit.org/show_bug.cgi?id=29617
 
-2009-10-02  Tor Arne Vestbø  <tor.arne.vestbo@nokia.com>
+        * JavaScriptCore.gyp/JavaScriptCore.gyp: Added.
 
-        Rubber-stamped by Simon Hausmann.
+2009-09-22  Thiago Macieira  <thiago.macieira@nokia.com>
 
-        Fix the Qt on Mac OS X build.
+        Reviewed by Simon Hausmann.
 
-        * wtf/FastMalloc.cpp:
+        Fix compilation with WINSCW: no varargs macros
 
-2009-10-02  Jørgen Lind  <jorgen.lind@nokia.com>
+        Disable variadic arguments for WINSCW just like we do
+        for MSVC7.
+
+        * wtf/Assertions.h:
+
+2009-09-22  Kent Hansen  <khansen@trolltech.com>
 
         Reviewed by Simon Hausmann.
 
-        Allow enabling and disabling of the JIT through a qmake variable.
+        Disable variadic macros on MSVC7.
 
-        Qt's configure may set this variable through .qmake.cache if a
-        commandline option is given and/or the compile test for hwcap.h
-        failed/succeeded.
+        This was originally added in r26589 but not extended
+        when LOG_DISABLED/ASSERT_DISABLED was introduced.
+
+        * wtf/Assertions.h:
+
+2009-09-22  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Unreviewed build fix for Windows CE < 5
+
+        Define WINCEBASIC to disable the IsDebuggerPresent() code in
+        wtf/Assertions.cpp.
 
         * JavaScriptCore.pri:
 
-2009-09-23  Geoffrey Garen  <ggaren@apple.com>
+2009-09-22  Joerg Bornemann  <joerg.bornemann@nokia.com>
 
-        A piece of my last patch that I forgot.
+        Reviewed by Simon Hausmann.
 
-        * wtf/HashCountedSet.h:
-        (WTF::::clear): Added HashCountedSet::clear.
+        Fix major memory leak in JavaScriptCore RegisterFile on Windows CE
 
-2009-09-24  Gabor Loki  <loki@inf.u-szeged.hu>
+        https://bugs.webkit.org/show_bug.cgi?id=29367
 
-        Reviewed by Gavin Barraclough.
+        On Widows CE we must decommit all committed pages before we release
+        them. See VirtualFree documentation.
+        Desktop Windows behaves much smoother in this situation.
 
-        Reduce heap size on Symbian from 64MB to 8MB.
+        * interpreter/RegisterFile.cpp:
+        (JSC::RegisterFile::~RegisterFile):
 
-        This is not a perfect fix, it requires more fine tuning.
-        But this makes it possible again to debug in the emulator,
-        which is more important in order to be able to fix other
-        run-time issues.
+2009-09-21  Greg Bolsinga  <bolsinga@apple.com>
 
-        * runtime/Collector.h:
+        Reviewed by Simon Fraser & Sam Weinig.
 
-2009-09-30  Janne Koskinen  <janne.p.koskinen@digia.com> 
+        Add ENABLE(ORIENTATION_EVENTS)
+        https://bugs.webkit.org/show_bug.cgi?id=29508
 
-        Reviewed by Simon Hausmann.
+        * wtf/Platform.h: Also sort PLATFORM(IPHONE) #defines.
 
-        Avoid __clear_cache built-in function if DISABLE_BUILTIN_CLEAR_CACHE define is set
-        https://bugs.webkit.org/show_bug.cgi?id=28886
+2009-09-21  Jedrzej Nowacki  <jedrzej.nowacki@nokia.com>
 
-        There are some GCC packages (for example GCC-2006q3 from CodeSourcery)
-        which contain __clear_cache built-in function only for C while the C++
-        version of __clear_cache is missing on ARM architectures.
+        Reviewed by Eric Seidel.
 
-        Fixed a small bug in the inline assembly of cacheFlush function on
-        ARM_TRADITIONAL.
+        [Fix] SourceCode's uninitialized member
+        
+        Potential source of crashes and bugs was fixed. Default constructor
+        didn't initialized m_provider member.
 
-        * jit/ExecutableAllocator.h:
-        (JSC::ExecutableAllocator::cacheFlush):
+        https://bugs.webkit.org/show_bug.cgi?id=29364
+
+        * parser/SourceCode.h:
+        (JSC::SourceCode::SourceCode):
 
 2009-09-21  Oliver Hunt  <oliver@apple.com>
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/Info.plist b/src/3rdparty/javascriptcore/JavaScriptCore/Info.plist
index 17949b0..77c9eb8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/Info.plist
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/Info.plist
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
@@ -7,7 +7,7 @@
 	<key>CFBundleExecutable</key>
 	<string>${PRODUCT_NAME}</string>
 	<key>CFBundleGetInfoString</key>
-	<string>${BUNDLE_VERSION}, Copyright 2003-2009 Apple Inc.; Copyright 1999-2001 Harri Porten &lt;porten@kde.org&gt;; Copyright 2001 Peter Kelly &lt;pmk@post.com&gt;; Copyright 1997-2005 University of Cambridge; Copyright 1991, 2000, 2001 by Lucent Technologies.</string>
+	<string>${BUNDLE_VERSION}, Copyright 2003-2010 Apple Inc.; Copyright 1999-2001 Harri Porten &lt;porten@kde.org&gt;; Copyright 2001 Peter Kelly &lt;pmk@post.com&gt;; Copyright 1997-2005 University of Cambridge; Copyright 1991, 2000, 2001 by Lucent Technologies.</string>
 	<key>CFBundleIdentifier</key>
 	<string>com.apple.${PRODUCT_NAME}</string>
 	<key>CFBundleInfoDictionaryVersion</key>
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.gypi b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.gypi
index 15a0c0f..24577da 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.gypi
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.gypi
@@ -1,7 +1,6 @@
 {
     'variables': {
         'javascriptcore_files': [
-            'AllInOneFile.cpp',
             'API/APICast.h',
             'API/JavaScript.h',
             'API/JavaScriptCore.h',
@@ -19,6 +18,7 @@
             'API/JSClassRef.h',
             'API/JSContextRef.cpp',
             'API/JSContextRef.h',
+            'API/JSContextRefPrivate.h',
             'API/JSObjectRef.cpp',
             'API/JSObjectRef.h',
             'API/JSProfilerPrivate.cpp',
@@ -64,6 +64,7 @@
             'bytecode/StructureStubInfo.h',
             'bytecompiler/BytecodeGenerator.cpp',
             'bytecompiler/BytecodeGenerator.h',
+            'bytecompiler/NodesCodegen.cpp',
             'bytecompiler/Label.h',
             'bytecompiler/LabelScope.h',
             'bytecompiler/RegisterID.h',
@@ -148,8 +149,6 @@
             'pcre/ucpinternal.h',
             'pcre/ucptable.cpp',
             'profiler/CallIdentifier.h',
-            'profiler/HeavyProfile.cpp',
-            'profiler/HeavyProfile.h',
             'profiler/Profile.cpp',
             'profiler/Profile.h',
             'profiler/ProfileGenerator.cpp',
@@ -159,8 +158,6 @@
             'profiler/Profiler.cpp',
             'profiler/Profiler.h',
             'profiler/ProfilerServer.h',
-            'profiler/TreeProfile.cpp',
-            'profiler/TreeProfile.h',
             'runtime/ArgList.cpp',
             'runtime/ArgList.h',
             'runtime/Arguments.cpp',
@@ -194,6 +191,7 @@
             'runtime/DateConversion.h',
             'runtime/DateInstance.cpp',
             'runtime/DateInstance.h',
+            'runtime/DateInstanceCache.h',
             'runtime/DatePrototype.cpp',
             'runtime/DatePrototype.h',
             'runtime/Error.cpp',
@@ -331,6 +329,7 @@
             'runtime/Tracing.h',
             'runtime/UString.cpp',
             'runtime/UString.h',
+            'runtime/WeakRandom.h',
             'wrec/CharacterClass.cpp',
             'wrec/CharacterClass.h',
             'wrec/CharacterClassConstructor.cpp',
@@ -368,8 +367,8 @@
             'wtf/FastMalloc.h',
             'wtf/Forward.h',
             'wtf/GetPtr.h',
-            'wtf/GOwnPtr.cpp',
-            'wtf/GOwnPtr.h',
+            'wtf/gtk/GOwnPtr.cpp',
+            'wtf/gtk/GOwnPtr.h',
             'wtf/gtk/MainThreadGtk.cpp',
             'wtf/gtk/ThreadingGtk.cpp',
             'wtf/HashCountedSet.h',
@@ -399,8 +398,6 @@
             'wtf/PassRefPtr.h',
             'wtf/Platform.h',
             'wtf/PtrAndFlags.h',
-            'wtf/qt/MainThreadQt.cpp',
-            'wtf/qt/ThreadingQt.cpp',
             'wtf/RandomNumber.cpp',
             'wtf/RandomNumber.h',
             'wtf/RandomNumberSeed.h',
@@ -413,11 +410,16 @@
             'wtf/SegmentedVector.h',
             'wtf/StdLibExtras.h',
             'wtf/StringExtras.h',
+            'wtf/StringHashFunctions.h',
             'wtf/TCPackedCache.h',
+            'wtf/qt/MainThreadQt.cpp',
+            'wtf/qt/ThreadingQt.cpp',
             'wtf/TCPageMap.h',
             'wtf/TCSpinLock.h',
             'wtf/TCSystemAlloc.cpp',
             'wtf/TCSystemAlloc.h',
+            'wtf/ThreadIdentifierDataPthreads.cpp',
+            'wtf/ThreadIdentifierDataPthreads.h',
             'wtf/Threading.cpp',
             'wtf/Threading.h',
             'wtf/ThreadingNone.cpp',
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.order b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.order
index 3ae3ec6..d6f6caa 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.order
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.order
@@ -1625,7 +1625,6 @@ __ZN3JSC18EmptyStatementNode12emitBytecodeERNS_17BytecodeGeneratorEPNS_10Registe
 __ZN3JSCL27compareByStringPairForQSortEPKvS1_
 __Z22jsc_pcre_ucp_othercasej
 __ZN3JSCL35objectProtoFuncPropertyIsEnumerableEPNS_9ExecStateEPNS_8JSObjectENS_7JSValueERKNS_7ArgListE
-__ZNK3JSC8JSObject21getPropertyAttributesEPNS_9ExecStateERKNS_10IdentifierERj
 __ZN3WTF7HashMapIjN3JSC7JSValueENS_7IntHashIjEENS_10HashTraitsIjEENS5_IS2_EEE3setERKjRKS2_
 __ZN3WTF9HashTableIjSt4pairIjN3JSC7JSValueEENS_18PairFirstExtractorIS4_EENS_7IntHashIjEENS_14PairHashTraitsINS_10HashTraitsIjEE
 __ZN3JSC12RegisterFile21releaseExcessCapacityEv
@@ -1841,7 +1840,6 @@ __ZN3JSC6JSCell14toThisJSStringEPNS_9ExecStateE
 __ZNK3JSC6JSCell12toThisStringEPNS_9ExecStateE
 __ZN3JSCL27objectProtoFuncLookupSetterEPNS_9ExecStateEPNS_8JSObjectENS_7JSValueERKNS_7ArgListE
 __ZN3JSC8JSObject12lookupSetterEPNS_9ExecStateERKNS_10IdentifierE
-__ZNK3JSC16JSVariableObject21getPropertyAttributesEPNS_9ExecStateERKNS_10IdentifierERj
 __ZN3JSC9ExecState22regExpConstructorTableEPS0_
 __ZN3JSCL24regExpConstructorDollar7EPNS_9ExecStateERKNS_10IdentifierERKNS_12PropertySlotE
 __ZN3JSCL24regExpConstructorDollar8EPNS_9ExecStateERKNS_10IdentifierERKNS_12PropertySlotE
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri
index a6fb2f8..75737ae 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri
@@ -1,14 +1,23 @@
 # JavaScriptCore - Qt4 build info
 VPATH += $$PWD
 
+CONFIG(standalone_package) {
+    isEmpty(JSC_GENERATED_SOURCES_DIR):JSC_GENERATED_SOURCES_DIR = $$PWD/generated
+} else {
+    isEmpty(JSC_GENERATED_SOURCES_DIR):JSC_GENERATED_SOURCES_DIR = generated
+}
+
 CONFIG(debug, debug|release) {
-    isEmpty(GENERATED_SOURCES_DIR):GENERATED_SOURCES_DIR = generated$${QMAKE_DIR_SEP}debug
     OBJECTS_DIR = obj/debug
 } else { # Release
-    isEmpty(GENERATED_SOURCES_DIR):GENERATED_SOURCES_DIR = generated$${QMAKE_DIR_SEP}release
     OBJECTS_DIR = obj/release
 }
 
+symbian: {
+    # Need to guarantee this comes before system includes of /epoc32/include
+    MMP_RULES += "USERINCLUDE ../JavaScriptCore/profiler"
+}
+
 INCLUDEPATH = \
     $$PWD \
     $$PWD/.. \
@@ -19,6 +28,7 @@ INCLUDEPATH = \
     $$PWD/interpreter \
     $$PWD/jit \
     $$PWD/parser \
+    $$PWD/pcre \
     $$PWD/profiler \
     $$PWD/runtime \
     $$PWD/wrec \
@@ -27,12 +37,11 @@ INCLUDEPATH = \
     $$PWD/yarr \
     $$PWD/API \
     $$PWD/ForwardingHeaders \
-    $$GENERATED_SOURCES_DIR \
+    $$JSC_GENERATED_SOURCES_DIR \
     $$INCLUDEPATH
 
 DEFINES += BUILDING_QT__ BUILDING_JavaScriptCore BUILDING_WTF
 
-GENERATED_SOURCES_DIR_SLASH = $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}
 win32-* {
     LIBS += -lwinmm
 }
@@ -47,11 +56,6 @@ contains(JAVASCRIPTCORE_JIT,no) {
     DEFINES+=ENABLE_YARR=0
 }
 
-# In debug mode JIT disabled until crash fixed
-win32-* {
-    CONFIG(debug):!contains(DEFINES, ENABLE_JIT=1): DEFINES+=ENABLE_JIT=0
-}
-
 # Rules when JIT enabled (not disabled)
 !contains(DEFINES, ENABLE_JIT=0) {
     linux*-g++*:greaterThan(QT_GCC_MAJOR_VERSION,3):greaterThan(QT_GCC_MINOR_VERSION,0) {
@@ -68,33 +72,7 @@ wince* {
 
 include(pcre/pcre.pri)
 
-LUT_FILES += \
-    runtime/DatePrototype.cpp \
-    runtime/JSONObject.cpp \
-    runtime/NumberConstructor.cpp \
-    runtime/StringPrototype.cpp \
-    runtime/ArrayPrototype.cpp \
-    runtime/MathObject.cpp \
-    runtime/RegExpConstructor.cpp \
-    runtime/RegExpObject.cpp
-
-KEYWORDLUT_FILES += \
-    parser/Keywords.table
-
-JSCBISON += \
-    parser/Grammar.y
-
 SOURCES += \
-    wtf/Assertions.cpp \
-    wtf/ByteArray.cpp \
-    wtf/HashTable.cpp \
-    wtf/MainThread.cpp \
-    wtf/RandomNumber.cpp \
-    wtf/RefCountedLeakCounter.cpp \
-    wtf/TypeTraits.cpp \
-    wtf/unicode/CollatorDefault.cpp \
-    wtf/unicode/icu/CollatorICU.cpp \
-    wtf/unicode/UTF8.cpp \
     API/JSBase.cpp \
     API/JSCallbackConstructor.cpp \
     API/JSCallbackFunction.cpp \
@@ -105,55 +83,39 @@ SOURCES += \
     API/JSStringRef.cpp \
     API/JSValueRef.cpp \
     API/OpaqueJSString.cpp \
-    runtime/InitializeThreading.cpp \
-    runtime/JSGlobalData.cpp \
-    runtime/JSGlobalObject.cpp \
-    runtime/JSStaticScopeObject.cpp \
-    runtime/JSVariableObject.cpp \
-    runtime/JSActivation.cpp \
-    runtime/JSNotAnObject.cpp \
-    runtime/JSONObject.cpp \
-    runtime/LiteralParser.cpp \
-    runtime/MarkStack.cpp \
-    runtime/TimeoutChecker.cpp \
-    bytecode/CodeBlock.cpp \
-    bytecode/StructureStubInfo.cpp \
-    bytecode/JumpTable.cpp \
     assembler/ARMAssembler.cpp \
     assembler/MacroAssemblerARM.cpp \
-    jit/JIT.cpp \
-    jit/JITCall.cpp \
+    bytecode/CodeBlock.cpp \
+    bytecode/JumpTable.cpp \
+    bytecode/Opcode.cpp \
+    bytecode/SamplingTool.cpp \
+    bytecode/StructureStubInfo.cpp \
+    bytecompiler/BytecodeGenerator.cpp \
+    bytecompiler/NodesCodegen.cpp \
+    debugger/DebuggerActivation.cpp \
+    debugger/DebuggerCallFrame.cpp \
+    debugger/Debugger.cpp \
+    interpreter/CallFrame.cpp \
+    interpreter/Interpreter.cpp \
+    interpreter/RegisterFile.cpp \
+    jit/ExecutableAllocatorPosix.cpp \
+    jit/ExecutableAllocatorSymbian.cpp \
+    jit/ExecutableAllocatorWin.cpp \
+    jit/ExecutableAllocator.cpp \
     jit/JITArithmetic.cpp \
+    jit/JITCall.cpp \
+    jit/JIT.cpp \
     jit/JITOpcodes.cpp \
     jit/JITPropertyAccess.cpp \
-    jit/ExecutableAllocator.cpp \
     jit/JITStubs.cpp \
-    bytecompiler/BytecodeGenerator.cpp \
-    runtime/ExceptionHelpers.cpp \
-    runtime/JSPropertyNameIterator.cpp \
-    interpreter/Interpreter.cpp \
-    bytecode/Opcode.cpp \
-    bytecode/SamplingTool.cpp \
-    yarr/RegexCompiler.cpp \
-    yarr/RegexInterpreter.cpp \
-    yarr/RegexJIT.cpp \
-    interpreter/RegisterFile.cpp
-
-win32-*|wince* {
-    SOURCES += jit/ExecutableAllocatorWin.cpp \
-               runtime/MarkStackWin.cpp
-} else {
-    SOURCES += jit/ExecutableAllocatorPosix.cpp \
-               runtime/MarkStackPosix.cpp
-}
-
-!contains(DEFINES, USE_SYSTEM_MALLOC) {
-    SOURCES += wtf/TCSystemAlloc.cpp
-}
-
-# AllInOneFile.cpp helps gcc analize and optimize code
-# Other compilers may be able to do this at link time
-SOURCES += \
+    parser/Lexer.cpp \
+    parser/Nodes.cpp \
+    parser/ParserArena.cpp \
+    parser/Parser.cpp \
+    profiler/Profile.cpp \
+    profiler/ProfileGenerator.cpp \
+    profiler/ProfileNode.cpp \
+    profiler/Profiler.cpp \
     runtime/ArgList.cpp \
     runtime/Arguments.cpp \
     runtime/ArrayConstructor.cpp \
@@ -164,62 +126,67 @@ SOURCES += \
     runtime/CallData.cpp \
     runtime/Collector.cpp \
     runtime/CommonIdentifiers.cpp \
+    runtime/Completion.cpp \
     runtime/ConstructData.cpp \
-    wtf/CurrentTime.cpp \
     runtime/DateConstructor.cpp \
     runtime/DateConversion.cpp \
     runtime/DateInstance.cpp \
     runtime/DatePrototype.cpp \
-    debugger/Debugger.cpp \
-    debugger/DebuggerCallFrame.cpp \
-    debugger/DebuggerActivation.cpp \
-    wtf/dtoa.cpp \
-    runtime/Error.cpp \
     runtime/ErrorConstructor.cpp \
+    runtime/Error.cpp \
     runtime/ErrorInstance.cpp \
     runtime/ErrorPrototype.cpp \
-    interpreter/CallFrame.cpp \
+    runtime/ExceptionHelpers.cpp \
     runtime/Executable.cpp \
     runtime/FunctionConstructor.cpp \
     runtime/FunctionPrototype.cpp \
     runtime/GetterSetter.cpp \
     runtime/GlobalEvalFunction.cpp \
     runtime/Identifier.cpp \
+    runtime/InitializeThreading.cpp \
     runtime/InternalFunction.cpp \
-    runtime/Completion.cpp \
-    runtime/JSArray.cpp \
+    runtime/JSActivation.cpp \
     runtime/JSAPIValueWrapper.cpp \
+    runtime/JSArray.cpp \
     runtime/JSByteArray.cpp \
     runtime/JSCell.cpp \
     runtime/JSFunction.cpp \
+    runtime/JSGlobalData.cpp \
+    runtime/JSGlobalObject.cpp \
     runtime/JSGlobalObjectFunctions.cpp \
     runtime/JSImmediate.cpp \
     runtime/JSLock.cpp \
+    runtime/JSNotAnObject.cpp \
     runtime/JSNumberCell.cpp \
     runtime/JSObject.cpp \
+    runtime/JSONObject.cpp \
+    runtime/JSPropertyNameIterator.cpp \
+    runtime/JSStaticScopeObject.cpp \
     runtime/JSString.cpp \
     runtime/JSValue.cpp \
+    runtime/JSVariableObject.cpp \
     runtime/JSWrapperObject.cpp \
-    parser/Lexer.cpp \
+    runtime/LiteralParser.cpp \
     runtime/Lookup.cpp \
+    runtime/MarkStackPosix.cpp \
+    runtime/MarkStackSymbian.cpp \
+    runtime/MarkStackWin.cpp \
+    runtime/MarkStack.cpp \
     runtime/MathObject.cpp \
     runtime/NativeErrorConstructor.cpp \
     runtime/NativeErrorPrototype.cpp \
-    parser/Nodes.cpp \
     runtime/NumberConstructor.cpp \
     runtime/NumberObject.cpp \
     runtime/NumberPrototype.cpp \
     runtime/ObjectConstructor.cpp \
     runtime/ObjectPrototype.cpp \
     runtime/Operations.cpp \
-    parser/Parser.cpp \
-    parser/ParserArena.cpp \
     runtime/PropertyDescriptor.cpp \
     runtime/PropertyNameArray.cpp \
     runtime/PropertySlot.cpp \
     runtime/PrototypeFunction.cpp \
-    runtime/RegExp.cpp \
     runtime/RegExpConstructor.cpp \
+    runtime/RegExp.cpp \
     runtime/RegExpObject.cpp \
     runtime/RegExpPrototype.cpp \
     runtime/ScopeChain.cpp \
@@ -227,50 +194,38 @@ SOURCES += \
     runtime/StringConstructor.cpp \
     runtime/StringObject.cpp \
     runtime/StringPrototype.cpp \
-    runtime/Structure.cpp \
     runtime/StructureChain.cpp \
+    runtime/Structure.cpp \
+    runtime/TimeoutChecker.cpp \
     runtime/UString.cpp \
-    profiler/HeavyProfile.cpp \
-    profiler/Profile.cpp \
-    profiler/ProfileGenerator.cpp \
-    profiler/ProfileNode.cpp \
-    profiler/Profiler.cpp \
-    profiler/TreeProfile.cpp \
+    runtime/UStringImpl.cpp \
+    wtf/Assertions.cpp \
+    wtf/ByteArray.cpp \
+    wtf/CurrentTime.cpp \
     wtf/DateMath.cpp \
+    wtf/dtoa.cpp \
     wtf/FastMalloc.cpp \
+    wtf/HashTable.cpp \
+    wtf/MainThread.cpp \
+    wtf/qt/MainThreadQt.cpp \
+    wtf/qt/ThreadingQt.cpp \
+    wtf/RandomNumber.cpp \
+    wtf/RefCountedLeakCounter.cpp \
+    wtf/ThreadingNone.cpp \
     wtf/Threading.cpp \
-    wtf/qt/MainThreadQt.cpp
-
-!contains(DEFINES, ENABLE_SINGLE_THREADED=1) {
-    SOURCES += wtf/qt/ThreadingQt.cpp
-} else {
-    DEFINES += ENABLE_JSC_MULTIPLE_THREADS=0
-    SOURCES += wtf/ThreadingNone.cpp
-}
-
-# GENERATOR 1-A: LUT creator
-lut.output = $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}${QMAKE_FILE_BASE}.lut.h
-lut.commands = perl $$PWD/create_hash_table ${QMAKE_FILE_NAME} -i > ${QMAKE_FILE_OUT}
-lut.depend = ${QMAKE_FILE_NAME}
-lut.input = LUT_FILES
-lut.CONFIG += no_link
-addExtraCompiler(lut)
+    wtf/TypeTraits.cpp \
+    wtf/unicode/CollatorDefault.cpp \
+    wtf/unicode/icu/CollatorICU.cpp \
+    wtf/unicode/UTF8.cpp \
+    yarr/RegexCompiler.cpp \
+    yarr/RegexInterpreter.cpp \
+    yarr/RegexJIT.cpp
 
-# GENERATOR 1-B: particular LUT creator (for 1 file only)
-keywordlut.output = $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}Lexer.lut.h
-keywordlut.commands = perl $$PWD/create_hash_table ${QMAKE_FILE_NAME} -i > ${QMAKE_FILE_OUT}
-keywordlut.depend = ${QMAKE_FILE_NAME}
-keywordlut.input = KEYWORDLUT_FILES
-keywordlut.CONFIG += no_link
-addExtraCompiler(keywordlut)
+# Generated files, simply list them for JavaScriptCore
+SOURCES += \
+    $${JSC_GENERATED_SOURCES_DIR}/Grammar.cpp
 
-# GENERATOR 2: bison grammar
-jscbison.output = $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}${QMAKE_FILE_BASE}.cpp
-jscbison.commands = bison -d -p jscyy ${QMAKE_FILE_NAME} -o $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}${QMAKE_FILE_BASE}.tab.c && $(MOVE) $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}${QMAKE_FILE_BASE}.tab.c ${QMAKE_FILE_OUT} && $(MOVE) $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}${QMAKE_FILE_BASE}.tab.h $${GENERATED_SOURCES_DIR}$${QMAKE_DIR_SEP}${QMAKE_FILE_BASE}.h
-jscbison.depend = ${QMAKE_FILE_NAME}
-jscbison.input = JSCBISON
-jscbison.variable_out = GENERATED_SOURCES
-jscbison.dependency_type = TYPE_C
-jscbison.CONFIG = target_predeps
-addExtraCompilerWithHeader(jscbison)
+!contains(DEFINES, USE_SYSTEM_MALLOC) {
+    SOURCES += wtf/TCSystemAlloc.cpp
+}
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.cpp
index 1324586..6dd2b87 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.cpp
@@ -26,7 +26,7 @@
 
 #include "config.h"
 
-#if ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#if ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
 
 #include "ARMAssembler.h"
 
@@ -34,39 +34,6 @@ namespace JSC {
 
 // Patching helpers
 
-ARMWord* ARMAssembler::getLdrImmAddress(ARMWord* insn, uint32_t* constPool)
-{
-    // Must be an ldr ..., [pc +/- imm]
-    ASSERT((*insn & 0x0f7f0000) == 0x051f0000);
-
-    if (constPool && (*insn & 0x1))
-        return reinterpret_cast<ARMWord*>(constPool + ((*insn & SDT_OFFSET_MASK) >> 1));
-
-    ARMWord addr = reinterpret_cast<ARMWord>(insn) + 2 * sizeof(ARMWord);
-    if (*insn & DT_UP)
-        return reinterpret_cast<ARMWord*>(addr + (*insn & SDT_OFFSET_MASK));
-    else
-        return reinterpret_cast<ARMWord*>(addr - (*insn & SDT_OFFSET_MASK));
-}
-
-void ARMAssembler::linkBranch(void* code, JmpSrc from, void* to, int useConstantPool)
-{
-    ARMWord* insn = reinterpret_cast<ARMWord*>(code) + (from.m_offset / sizeof(ARMWord));
-
-    if (!useConstantPool) {
-        int diff = reinterpret_cast<ARMWord*>(to) - reinterpret_cast<ARMWord*>(insn + 2);
-
-        if ((diff <= BOFFSET_MAX && diff >= BOFFSET_MIN)) {
-            *insn = B | getConditionalField(*insn) | (diff & BRANCH_MASK);
-            ExecutableAllocator::cacheFlush(insn, sizeof(ARMWord));
-            return;
-        }
-    }
-    ARMWord* addr = getLdrImmAddress(insn);
-    *addr = reinterpret_cast<ARMWord>(to);
-    ExecutableAllocator::cacheFlush(addr, sizeof(ARMWord));
-}
-
 void ARMAssembler::patchConstantPoolLoad(void* loadAddr, void* constPoolAddr)
 {
     ARMWord *ldr = reinterpret_cast<ARMWord*>(loadAddr);
@@ -118,7 +85,7 @@ ARMWord ARMAssembler::getOp2(ARMWord imm)
     if ((imm & 0x00ffffff) == 0)
         return OP2_IMM | (imm >> 24) | (rol << 8);
 
-    return 0;
+    return INVALID_IMM;
 }
 
 int ARMAssembler::genInt(int reg, ARMWord imm, bool positive)
@@ -236,25 +203,18 @@ ARMWord ARMAssembler::getImm(ARMWord imm, int tmpReg, bool invert)
 
     // Do it by 1 instruction
     tmp = getOp2(imm);
-    if (tmp)
+    if (tmp != INVALID_IMM)
         return tmp;
 
     tmp = getOp2(~imm);
-    if (tmp) {
+    if (tmp != INVALID_IMM) {
         if (invert)
             return tmp | OP2_INV_IMM;
         mvn_r(tmpReg, tmp);
         return tmpReg;
     }
 
-    // Do it by 2 instruction
-    if (genInt(tmpReg, imm, true))
-        return tmpReg;
-    if (genInt(tmpReg, ~imm, false))
-        return tmpReg;
-
-    ldr_imm(tmpReg, imm);
-    return tmpReg;
+    return encodeComplexImm(imm, tmpReg);
 }
 
 void ARMAssembler::moveImm(ARMWord imm, int dest)
@@ -263,24 +223,41 @@ void ARMAssembler::moveImm(ARMWord imm, int dest)
 
     // Do it by 1 instruction
     tmp = getOp2(imm);
-    if (tmp) {
+    if (tmp != INVALID_IMM) {
         mov_r(dest, tmp);
         return;
     }
 
     tmp = getOp2(~imm);
-    if (tmp) {
+    if (tmp != INVALID_IMM) {
         mvn_r(dest, tmp);
         return;
     }
 
+    encodeComplexImm(imm, dest);
+}
+
+ARMWord ARMAssembler::encodeComplexImm(ARMWord imm, int dest)
+{
+#if WTF_ARM_ARCH_AT_LEAST(7)
+    ARMWord tmp = getImm16Op2(imm);
+    if (tmp != INVALID_IMM) {
+        movw_r(dest, tmp);
+        return dest;
+    }
+    movw_r(dest, getImm16Op2(imm & 0xffff));
+    movt_r(dest, getImm16Op2(imm >> 16));
+    return dest;
+#else
     // Do it by 2 instruction
     if (genInt(dest, imm, true))
-        return;
+        return dest;
     if (genInt(dest, ~imm, false))
-        return;
+        return dest;
 
     ldr_imm(dest, imm);
+    return dest;
+#endif
 }
 
 // Memory load/store helpers
@@ -378,10 +355,17 @@ void* ARMAssembler::executableCopy(ExecutablePool* allocator)
         // The last bit is set if the constant must be placed on constant pool.
         int pos = (*iter) & (~0x1);
         ARMWord* ldrAddr = reinterpret_cast<ARMWord*>(data + pos);
-        ARMWord offset = *getLdrImmAddress(ldrAddr);
-        if (offset != 0xffffffff) {
-            JmpSrc jmpSrc(pos);
-            linkBranch(data, jmpSrc, data + offset, ((*iter) & 1));
+        ARMWord* addr = getLdrImmAddress(ldrAddr);
+        if (*addr != 0xffffffff) {
+            if (!(*iter & 1)) {
+                int diff = reinterpret_cast<ARMWord*>(data + *addr) - (ldrAddr + DefaultPrefetching);
+
+                if ((diff <= BOFFSET_MAX && diff >= BOFFSET_MIN)) {
+                    *ldrAddr = B | getConditionalField(*ldrAddr) | (diff & BRANCH_MASK);
+                    continue;
+                }
+            }
+            *addr = reinterpret_cast<ARMWord>(data + *addr);
         }
     }
 
@@ -390,4 +374,4 @@ void* ARMAssembler::executableCopy(ExecutablePool* allocator)
 
 } // namespace JSC
 
-#endif // ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#endif // ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.h
index 9f9a450..6967b37 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMAssembler.h
@@ -29,7 +29,7 @@
 
 #include <wtf/Platform.h>
 
-#if ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#if ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
 
 #include "AssemblerBufferWithConstantPool.h"
 #include <wtf/Assertions.h>
@@ -121,6 +121,7 @@ namespace JSC {
             MUL = 0x00000090,
             MULL = 0x00c00090,
             FADDD = 0x0e300b00,
+            FDIVD = 0x0e800b00,
             FSUBD = 0x0e300b40,
             FMULD = 0x0e200b00,
             FCMPD = 0x0eb40b40,
@@ -133,12 +134,18 @@ namespace JSC {
             B = 0x0a000000,
             BL = 0x0b000000,
             FMSR = 0x0e000a10,
+            FMRS = 0x0e100a10,
             FSITOD = 0x0eb80bc0,
+            FTOSID = 0x0ebd0b40,
             FMSTAT = 0x0ef1fa10,
-#if ARM_ARCH_VERSION >= 5
+#if WTF_ARM_ARCH_AT_LEAST(5)
             CLZ = 0x016f0f10,
             BKPT = 0xe120070,
 #endif
+#if WTF_ARM_ARCH_AT_LEAST(7)
+            MOVW = 0x03000000,
+            MOVT = 0x03400000,
+#endif
         };
 
         enum {
@@ -175,6 +182,9 @@ namespace JSC {
             padForAlign32 = 0xee120070,
         };
 
+        static const ARMWord INVALID_IMM = 0xf0000000;
+        static const int DefaultPrefetching = 2;
+
         class JmpSrc {
             friend class ARMAssembler;
         public:
@@ -333,6 +343,20 @@ namespace JSC {
             emitInst(static_cast<ARMWord>(cc) | MOV, rd, ARMRegisters::r0, op2);
         }
 
+#if WTF_ARM_ARCH_AT_LEAST(7)
+        void movw_r(int rd, ARMWord op2, Condition cc = AL)
+        {
+            ASSERT((op2 | 0xf0fff) == 0xf0fff);
+            m_buffer.putInt(static_cast<ARMWord>(cc) | MOVW | RD(rd) | op2);
+        }
+
+        void movt_r(int rd, ARMWord op2, Condition cc = AL)
+        {
+            ASSERT((op2 | 0xf0fff) == 0xf0fff);
+            m_buffer.putInt(static_cast<ARMWord>(cc) | MOVT | RD(rd) | op2);
+        }
+#endif
+
         void movs_r(int rd, ARMWord op2, Condition cc = AL)
         {
             emitInst(static_cast<ARMWord>(cc) | MOV | SET_CC, rd, ARMRegisters::r0, op2);
@@ -378,6 +402,11 @@ namespace JSC {
             emitInst(static_cast<ARMWord>(cc) | FADDD, dd, dn, dm);
         }
 
+        void fdivd_r(int dd, int dn, int dm, Condition cc = AL)
+        {
+            emitInst(static_cast<ARMWord>(cc) | FDIVD, dd, dn, dm);
+        }
+
         void fsubd_r(int dd, int dn, int dm, Condition cc = AL)
         {
             emitInst(static_cast<ARMWord>(cc) | FSUBD, dd, dn, dm);
@@ -482,17 +511,27 @@ namespace JSC {
             emitInst(static_cast<ARMWord>(cc) | FMSR, rn, dd, 0);
         }
 
+        void fmrs_r(int rd, int dn, Condition cc = AL)
+        {
+            emitInst(static_cast<ARMWord>(cc) | FMRS, rd, dn, 0);
+        }
+
         void fsitod_r(int dd, int dm, Condition cc = AL)
         {
             emitInst(static_cast<ARMWord>(cc) | FSITOD, dd, 0, dm);
         }
 
+        void ftosid_r(int fd, int dm, Condition cc = AL)
+        {
+            emitInst(static_cast<ARMWord>(cc) | FTOSID, fd, 0, dm);
+        }
+
         void fmstat(Condition cc = AL)
         {
             m_buffer.putInt(static_cast<ARMWord>(cc) | FMSTAT);
         }
 
-#if ARM_ARCH_VERSION >= 5
+#if WTF_ARM_ARCH_AT_LEAST(5)
         void clz_r(int rd, int rm, Condition cc = AL)
         {
             m_buffer.putInt(static_cast<ARMWord>(cc) | CLZ | RD(rd) | RM(rm));
@@ -501,7 +540,7 @@ namespace JSC {
 
         void bkpt(ARMWord value)
         {
-#if ARM_ARCH_VERSION >= 5
+#if WTF_ARM_ARCH_AT_LEAST(5)
             m_buffer.putInt(BKPT | ((value & 0xff0) << 4) | (value & 0xf));
 #else
             // Cannot access to Zero memory address
@@ -594,15 +633,32 @@ namespace JSC {
 
         // Patching helpers
 
-        static ARMWord* getLdrImmAddress(ARMWord* insn, uint32_t* constPool = 0);
-        static void linkBranch(void* code, JmpSrc from, void* to, int useConstantPool = 0);
+        static ARMWord* getLdrImmAddress(ARMWord* insn)
+        {
+            // Must be an ldr ..., [pc +/- imm]
+            ASSERT((*insn & 0x0f7f0000) == 0x051f0000);
+
+            ARMWord addr = reinterpret_cast<ARMWord>(insn) + DefaultPrefetching * sizeof(ARMWord);
+            if (*insn & DT_UP)
+                return reinterpret_cast<ARMWord*>(addr + (*insn & SDT_OFFSET_MASK));
+            return reinterpret_cast<ARMWord*>(addr - (*insn & SDT_OFFSET_MASK));
+        }
+
+        static ARMWord* getLdrImmAddressOnPool(ARMWord* insn, uint32_t* constPool)
+        {
+            // Must be an ldr ..., [pc +/- imm]
+            ASSERT((*insn & 0x0f7f0000) == 0x051f0000);
+
+            if (*insn & 0x1)
+                return reinterpret_cast<ARMWord*>(constPool + ((*insn & SDT_OFFSET_MASK) >> 1));
+            return getLdrImmAddress(insn);
+        }
 
         static void patchPointerInternal(intptr_t from, void* to)
         {
             ARMWord* insn = reinterpret_cast<ARMWord*>(from);
             ARMWord* addr = getLdrImmAddress(insn);
             *addr = reinterpret_cast<ARMWord>(to);
-            ExecutableAllocator::cacheFlush(addr, sizeof(ARMWord));
         }
 
         static ARMWord patchConstantPoolLoad(ARMWord load, ARMWord value)
@@ -647,12 +703,13 @@ namespace JSC {
         void linkJump(JmpSrc from, JmpDst to)
         {
             ARMWord* insn = reinterpret_cast<ARMWord*>(m_buffer.data()) + (from.m_offset / sizeof(ARMWord));
-            *getLdrImmAddress(insn, m_buffer.poolAddress()) = static_cast<ARMWord>(to.m_offset);
+            ARMWord* addr = getLdrImmAddressOnPool(insn, m_buffer.poolAddress());
+            *addr = static_cast<ARMWord>(to.m_offset);
         }
 
         static void linkJump(void* code, JmpSrc from, void* to)
         {
-            linkBranch(code, from, to);
+            patchPointerInternal(reinterpret_cast<intptr_t>(code) + from.m_offset, to);
         }
 
         static void relinkJump(void* from, void* to)
@@ -662,12 +719,12 @@ namespace JSC {
 
         static void linkCall(void* code, JmpSrc from, void* to)
         {
-            linkBranch(code, from, to, true);
+            patchPointerInternal(reinterpret_cast<intptr_t>(code) + from.m_offset, to);
         }
 
         static void relinkCall(void* from, void* to)
         {
-            relinkJump(from, to);
+            patchPointerInternal(reinterpret_cast<intptr_t>(from) - sizeof(ARMWord), to);
         }
 
         // Address operations
@@ -708,8 +765,18 @@ namespace JSC {
         }
 
         static ARMWord getOp2(ARMWord imm);
+
+#if WTF_ARM_ARCH_AT_LEAST(7)
+        static ARMWord getImm16Op2(ARMWord imm)
+        {
+            if (imm <= 0xffff)
+                return (imm & 0xf000) << 4 | (imm & 0xfff);
+            return INVALID_IMM;
+        }
+#endif
         ARMWord getImm(ARMWord imm, int tmpReg, bool invert = false);
         void moveImm(ARMWord imm, int dest);
+        ARMWord encodeComplexImm(ARMWord imm, int dest);
 
         // Memory load/store helpers
 
@@ -764,6 +831,6 @@ namespace JSC {
 
 } // namespace JSC
 
-#endif // ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#endif // ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
 
 #endif // ARMAssembler_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMv7Assembler.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMv7Assembler.h
index 078de44..6cde63b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMv7Assembler.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/ARMv7Assembler.h
@@ -28,7 +28,7 @@
 
 #include <wtf/Platform.h>
 
-#if ENABLE(ASSEMBLER) && PLATFORM(ARM_THUMB2)
+#if ENABLE(ASSEMBLER) && CPU(ARM_THUMB2)
 
 #include "AssemblerBuffer.h"
 #include <wtf/Assertions.h>
@@ -236,6 +236,11 @@ class ARMThumbImmediate {
     ARMThumbImmediate(ThumbImmediateType type, uint16_t value)
         : m_type(TypeUInt16)
     {
+        // Make sure this constructor is only reached with type TypeUInt16;
+        // this extra parameter makes the code a little clearer by making it
+        // explicit at call sites which type is being constructed
+        ASSERT_UNUSED(type, type == TypeUInt16);
+
         m_value.asInt = value;
     }
 
@@ -407,6 +412,11 @@ register writeback
 
 class ARMv7Assembler {
 public:
+    ~ARMv7Assembler()
+    {
+        ASSERT(m_jumpsToLink.isEmpty());
+    }
+
     typedef ARMRegisters::RegisterID RegisterID;
     typedef ARMRegisters::FPRegisterID FPRegisterID;
 
@@ -477,6 +487,17 @@ public:
 
 private:
 
+    struct LinkRecord {
+        LinkRecord(intptr_t from, intptr_t to)
+            : from(from)
+            , to(to)
+        {
+        }
+
+        intptr_t from;
+        intptr_t to;
+    };
+
     // ARMv7, Appx-A.6.3
     bool BadReg(RegisterID reg)
     {
@@ -574,6 +595,7 @@ private:
         OP_SUB_SP_imm_T1    = 0xB080,
         OP_BKPT             = 0xBE00,
         OP_IT               = 0xBF00,
+        OP_NOP_T1           = 0xBF00,
     } OpcodeID;
 
     typedef enum {
@@ -608,6 +630,7 @@ private:
         OP_MOV_imm_T3   = 0xF240,
         OP_SUB_imm_T4   = 0xF2A0,
         OP_MOVT         = 0xF2C0,
+        OP_NOP_T2a      = 0xF3AF,
         OP_LDRH_reg_T2  = 0xF830,
         OP_LDRH_imm_T3  = 0xF830,
         OP_STR_imm_T4   = 0xF840,
@@ -626,6 +649,7 @@ private:
 
     typedef enum {
         OP_B_T4b        = 0x9000,
+        OP_NOP_T2b      = 0x8000,
     } OpcodeID2;
 
     struct FourFours {
@@ -1481,6 +1505,15 @@ public:
     void* executableCopy(ExecutablePool* allocator)
     {
         void* copy = m_formatter.executableCopy(allocator);
+
+        unsigned jumpCount = m_jumpsToLink.size();
+        for (unsigned i = 0; i < jumpCount; ++i) {
+            uint16_t* location = reinterpret_cast<uint16_t*>(reinterpret_cast<intptr_t>(copy) + m_jumpsToLink[i].from);
+            uint16_t* target = reinterpret_cast<uint16_t*>(reinterpret_cast<intptr_t>(copy) + m_jumpsToLink[i].to);
+            linkJumpAbsolute(location, target);
+        }
+        m_jumpsToLink.clear();
+
         ASSERT(copy);
         return copy;
     }
@@ -1503,11 +1536,7 @@ public:
     {
         ASSERT(to.m_offset != -1);
         ASSERT(from.m_offset != -1);
-
-        uint16_t* location = reinterpret_cast<uint16_t*>(reinterpret_cast<intptr_t>(m_formatter.data()) + from.m_offset);
-        intptr_t relative = to.m_offset - from.m_offset;
-
-        linkWithOffset(location, relative);
+        m_jumpsToLink.append(LinkRecord(from.m_offset, to.m_offset));
     }
 
     static void linkJump(void* code, JmpSrc from, void* to)
@@ -1515,9 +1544,7 @@ public:
         ASSERT(from.m_offset != -1);
         
         uint16_t* location = reinterpret_cast<uint16_t*>(reinterpret_cast<intptr_t>(code) + from.m_offset);
-        intptr_t relative = reinterpret_cast<intptr_t>(to) - reinterpret_cast<intptr_t>(location);
-
-        linkWithOffset(location, relative);
+        linkJumpAbsolute(location, to);
     }
 
     // bah, this mathod should really be static, since it is used by the LinkBuffer.
@@ -1541,10 +1568,9 @@ public:
         ASSERT(!(reinterpret_cast<intptr_t>(from) & 1));
         ASSERT(!(reinterpret_cast<intptr_t>(to) & 1));
 
-        intptr_t relative = reinterpret_cast<intptr_t>(to) - reinterpret_cast<intptr_t>(from);
-        linkWithOffset(reinterpret_cast<uint16_t*>(from), relative);
+        linkJumpAbsolute(reinterpret_cast<uint16_t*>(from), to);
 
-        ExecutableAllocator::cacheFlush(reinterpret_cast<uint16_t*>(from) - 2, 2 * sizeof(uint16_t));
+        ExecutableAllocator::cacheFlush(reinterpret_cast<uint16_t*>(from) - 5, 5 * sizeof(uint16_t));
     }
     
     static void relinkCall(void* from, void* to)
@@ -1613,14 +1639,14 @@ private:
     static void setInt32(void* code, uint32_t value)
     {
         uint16_t* location = reinterpret_cast<uint16_t*>(code);
+        ASSERT(isMOV_imm_T3(location - 4) && isMOVT(location - 2));
 
-        uint16_t lo16 = value;
-        uint16_t hi16 = value >> 16;
-
-        spliceHi5(location - 4, lo16);
-        spliceLo11(location - 3, lo16);
-        spliceHi5(location - 2, hi16);
-        spliceLo11(location - 1, hi16);
+        ARMThumbImmediate lo16 = ARMThumbImmediate::makeUInt16(static_cast<uint16_t>(value));
+        ARMThumbImmediate hi16 = ARMThumbImmediate::makeUInt16(static_cast<uint16_t>(value >> 16));
+        location[-4] = twoWordOp5i6Imm4Reg4EncodedImmFirst(OP_MOV_imm_T3, lo16);
+        location[-3] = twoWordOp5i6Imm4Reg4EncodedImmSecond((location[-3] >> 8) & 0xf, lo16);
+        location[-2] = twoWordOp5i6Imm4Reg4EncodedImmFirst(OP_MOVT, hi16);
+        location[-1] = twoWordOp5i6Imm4Reg4EncodedImmSecond((location[-1] >> 8) & 0xf, hi16);
 
         ExecutableAllocator::cacheFlush(location - 4, 4 * sizeof(uint16_t));
     }
@@ -1630,41 +1656,89 @@ private:
         setInt32(code, reinterpret_cast<uint32_t>(value));
     }
 
-    // Linking & patching:
-    // This method assumes that the JmpSrc being linked is a T4 b instruction.
-    static void linkWithOffset(uint16_t* instruction, intptr_t relative)
-    {
-        // Currently branches > 16m = mostly deathy.
-        if (((relative << 7) >> 7) != relative) {
-            // FIXME: This CRASH means we cannot turn the JIT on by default on arm-v7.
-            fprintf(stderr, "Error: Cannot link T4b.\n");
-            CRASH();
-        }
-        
-        // ARM encoding for the top two bits below the sign bit is 'peculiar'.
-        if (relative >= 0)
-            relative ^= 0xC00000;
+    static bool isB(void* address)
+    {
+        uint16_t* instruction = static_cast<uint16_t*>(address);
+        return ((instruction[0] & 0xf800) == OP_B_T4a) && ((instruction[1] & 0xd000) == OP_B_T4b);
+    }
 
-        // All branch offsets should be an even distance.
-        ASSERT(!(relative & 1));
+    static bool isBX(void* address)
+    {
+        uint16_t* instruction = static_cast<uint16_t*>(address);
+        return (instruction[0] & 0xff87) == OP_BX;
+    }
 
-        int word1 = ((relative & 0x1000000) >> 14) | ((relative & 0x3ff000) >> 12);
-        int word2 = ((relative & 0x800000) >> 10) | ((relative & 0x400000) >> 11) | ((relative & 0xffe) >> 1);
+    static bool isMOV_imm_T3(void* address)
+    {
+        uint16_t* instruction = static_cast<uint16_t*>(address);
+        return ((instruction[0] & 0xFBF0) == OP_MOV_imm_T3) && ((instruction[1] & 0x8000) == 0);
+    }
 
-        instruction[-2] = OP_B_T4a | word1;
-        instruction[-1] = OP_B_T4b | word2;
+    static bool isMOVT(void* address)
+    {
+        uint16_t* instruction = static_cast<uint16_t*>(address);
+        return ((instruction[0] & 0xFBF0) == OP_MOVT) && ((instruction[1] & 0x8000) == 0);
     }
 
-    // These functions can be used to splice 16-bit immediates back into previously generated instructions.
-    static void spliceHi5(uint16_t* where, uint16_t what)
+    static bool isNOP_T1(void* address)
     {
-        uint16_t pattern = (what >> 12) | ((what & 0x0800) >> 1);
-        *where = (*where & 0xFBF0) | pattern;
+        uint16_t* instruction = static_cast<uint16_t*>(address);
+        return instruction[0] == OP_NOP_T1;
     }
-    static void spliceLo11(uint16_t* where, uint16_t what)
+
+    static bool isNOP_T2(void* address)
     {
-        uint16_t pattern = ((what & 0x0700) << 4) | (what & 0x00FF);
-        *where = (*where & 0x8F00) | pattern;
+        uint16_t* instruction = static_cast<uint16_t*>(address);
+        return (instruction[0] == OP_NOP_T2a) && (instruction[1] == OP_NOP_T2b);
+    }
+
+    static void linkJumpAbsolute(uint16_t* instruction, void* target)
+    {
+        // FIMXE: this should be up in the MacroAssembler layer. :-(
+        const uint16_t JUMP_TEMPORARY_REGISTER = ARMRegisters::ip;
+
+        ASSERT(!(reinterpret_cast<intptr_t>(instruction) & 1));
+        ASSERT(!(reinterpret_cast<intptr_t>(target) & 1));
+
+        ASSERT( (isMOV_imm_T3(instruction - 5) && isMOVT(instruction - 3) && isBX(instruction - 1))
+            || (isNOP_T1(instruction - 5) && isNOP_T2(instruction - 4) && isB(instruction - 2)) );
+
+        intptr_t relative = reinterpret_cast<intptr_t>(target) - (reinterpret_cast<intptr_t>(instruction));
+        if (((relative << 7) >> 7) == relative) {
+            // ARM encoding for the top two bits below the sign bit is 'peculiar'.
+            if (relative >= 0)
+                relative ^= 0xC00000;
+
+            // All branch offsets should be an even distance.
+            ASSERT(!(relative & 1));
+            // There may be a better way to fix this, but right now put the NOPs first, since in the
+            // case of an conditional branch this will be coming after an ITTT predicating *three*
+            // instructions!  Looking backwards to modify the ITTT to an IT is not easy, due to
+            // variable wdith encoding - the previous instruction might *look* like an ITTT but
+            // actually be the second half of a 2-word op.
+            instruction[-5] = OP_NOP_T1;
+            instruction[-4] = OP_NOP_T2a;
+            instruction[-3] = OP_NOP_T2b;
+            instruction[-2] = OP_B_T4a | ((relative & 0x1000000) >> 14) | ((relative & 0x3ff000) >> 12);
+            instruction[-1] = OP_B_T4b | ((relative & 0x800000) >> 10) | ((relative & 0x400000) >> 11) | ((relative & 0xffe) >> 1);
+        } else {
+            ARMThumbImmediate lo16 = ARMThumbImmediate::makeUInt16(static_cast<uint16_t>(reinterpret_cast<uint32_t>(target) + 1));
+            ARMThumbImmediate hi16 = ARMThumbImmediate::makeUInt16(static_cast<uint16_t>(reinterpret_cast<uint32_t>(target) >> 16));
+            instruction[-5] = twoWordOp5i6Imm4Reg4EncodedImmFirst(OP_MOV_imm_T3, lo16);
+            instruction[-4] = twoWordOp5i6Imm4Reg4EncodedImmSecond(JUMP_TEMPORARY_REGISTER, lo16);
+            instruction[-3] = twoWordOp5i6Imm4Reg4EncodedImmFirst(OP_MOVT, hi16);
+            instruction[-2] = twoWordOp5i6Imm4Reg4EncodedImmSecond(JUMP_TEMPORARY_REGISTER, hi16);
+            instruction[-1] = OP_BX | (JUMP_TEMPORARY_REGISTER << 3);
+        }
+    }
+
+    static uint16_t twoWordOp5i6Imm4Reg4EncodedImmFirst(uint16_t op, ARMThumbImmediate imm)
+    {
+        return op | (imm.m_value.i << 10) | imm.m_value.imm4;
+    }
+    static uint16_t twoWordOp5i6Imm4Reg4EncodedImmSecond(uint16_t rd, ARMThumbImmediate imm)
+    {
+        return (imm.m_value.imm3 << 12) | (rd << 8) | imm.m_value.imm8;
     }
 
     class ARMInstructionFormatter {
@@ -1723,8 +1797,11 @@ private:
 
         void twoWordOp5i6Imm4Reg4EncodedImm(OpcodeID1 op, int imm4, RegisterID rd, ARMThumbImmediate imm)
         {
-            m_buffer.putShort(op | (imm.m_value.i << 10) | imm4);
-            m_buffer.putShort((imm.m_value.imm3 << 12) | (rd << 8) | imm.m_value.imm8);
+            ARMThumbImmediate newImm = imm;
+            newImm.m_value.imm4 = imm4;
+
+            m_buffer.putShort(ARMv7Assembler::twoWordOp5i6Imm4Reg4EncodedImmFirst(op, newImm));
+            m_buffer.putShort(ARMv7Assembler::twoWordOp5i6Imm4Reg4EncodedImmSecond(rd, newImm));
         }
 
         void twoWordOp12Reg4Reg4Imm12(OpcodeID1 op, RegisterID reg1, RegisterID reg2, uint16_t imm)
@@ -1749,10 +1826,12 @@ private:
     private:
         AssemblerBuffer m_buffer;
     } m_formatter;
+
+    Vector<LinkRecord> m_jumpsToLink;
 };
 
 } // namespace JSC
 
-#endif // ENABLE(ASSEMBLER) && PLATFORM(ARM_THUMB2)
+#endif // ENABLE(ASSEMBLER) && CPU(ARM_THUMB2)
 
 #endif // ARMAssembler_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/AbstractMacroAssembler.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/AbstractMacroAssembler.h
index 525fe98..198e8d1 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/AbstractMacroAssembler.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/AbstractMacroAssembler.h
@@ -173,16 +173,16 @@ public:
     struct Imm32 {
         explicit Imm32(int32_t value)
             : m_value(value)
-#if PLATFORM(ARM)
+#if CPU(ARM)
             , m_isPointer(false)
 #endif
         {
         }
 
-#if !PLATFORM(X86_64)
+#if !CPU(X86_64)
         explicit Imm32(ImmPtr ptr)
             : m_value(ptr.asIntptr())
-#if PLATFORM(ARM)
+#if CPU(ARM)
             , m_isPointer(true)
 #endif
         {
@@ -190,7 +190,7 @@ public:
 #endif
 
         int32_t m_value;
-#if PLATFORM(ARM)
+#if CPU(ARM)
         // We rely on being able to regenerate code to recover exception handling
         // information.  Since ARMv7 supports 16-bit immediates there is a danger
         // that if pointer values change the layout of the generated code will change.
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssembler.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssembler.h
index 2743ab4..76bd205 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssembler.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssembler.h
@@ -30,19 +30,19 @@
 
 #if ENABLE(ASSEMBLER)
 
-#if PLATFORM(ARM_THUMB2)
+#if CPU(ARM_THUMB2)
 #include "MacroAssemblerARMv7.h"
 namespace JSC { typedef MacroAssemblerARMv7 MacroAssemblerBase; };
 
-#elif PLATFORM(ARM_TRADITIONAL)
+#elif CPU(ARM_TRADITIONAL)
 #include "MacroAssemblerARM.h"
 namespace JSC { typedef MacroAssemblerARM MacroAssemblerBase; };
 
-#elif PLATFORM(X86)
+#elif CPU(X86)
 #include "MacroAssemblerX86.h"
 namespace JSC { typedef MacroAssemblerX86 MacroAssemblerBase; };
 
-#elif PLATFORM(X86_64)
+#elif CPU(X86_64)
 #include "MacroAssemblerX86_64.h"
 namespace JSC { typedef MacroAssemblerX86_64 MacroAssemblerBase; };
 
@@ -60,7 +60,7 @@ public:
     using MacroAssemblerBase::jump;
     using MacroAssemblerBase::branch32;
     using MacroAssemblerBase::branch16;
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     using MacroAssemblerBase::branchPtr;
     using MacroAssemblerBase::branchTestPtr;
 #endif
@@ -133,7 +133,8 @@ public:
 
     // Ptr methods
     // On 32-bit platforms (i.e. x86), these methods directly map onto their 32-bit equivalents.
-#if !PLATFORM(X86_64)
+    // FIXME: should this use a test for 32-bitness instead of this specific exception?
+#if !CPU(X86_64)
     void addPtr(RegisterID src, RegisterID dest)
     {
         add32(src, dest);
@@ -179,16 +180,6 @@ public:
         or32(imm, dest);
     }
 
-    void rshiftPtr(RegisterID shift_amount, RegisterID dest)
-    {
-        rshift32(shift_amount, dest);
-    }
-
-    void rshiftPtr(Imm32 imm, RegisterID dest)
-    {
-        rshift32(imm, dest);
-    }
-
     void subPtr(RegisterID src, RegisterID dest)
     {
         sub32(src, dest);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.cpp
index d726ecd..b5b20fa 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.cpp
@@ -26,11 +26,11 @@
 
 #include "config.h"
 
-#if ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#if ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
 
 #include "MacroAssemblerARM.h"
 
-#if PLATFORM(LINUX)
+#if OS(LINUX)
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -43,7 +43,7 @@ namespace JSC {
 
 static bool isVFPPresent()
 {
-#if PLATFORM(LINUX)
+#if OS(LINUX)
     int fd = open("/proc/self/auxv", O_RDONLY);
     if (fd > 0) {
         Elf32_auxv_t aux;
@@ -62,7 +62,8 @@ static bool isVFPPresent()
 
 const bool MacroAssemblerARM::s_isVFPPresent = isVFPPresent();
 
-#if defined(ARM_REQUIRE_NATURAL_ALIGNMENT) && ARM_REQUIRE_NATURAL_ALIGNMENT
+#if CPU(ARMV5_OR_LOWER)
+/* On ARMv5 and below, natural alignment is required. */
 void MacroAssemblerARM::load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest)
 {
     ARMWord op2;
@@ -91,4 +92,4 @@ void MacroAssemblerARM::load32WithUnalignedHalfWords(BaseIndex address, Register
 
 }
 
-#endif // ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#endif // ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.h
index aa8cbb0..21b8de8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARM.h
@@ -30,7 +30,7 @@
 
 #include <wtf/Platform.h>
 
-#if ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#if ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
 
 #include "ARMAssembler.h"
 #include "AbstractMacroAssembler.h"
@@ -38,6 +38,9 @@
 namespace JSC {
 
 class MacroAssemblerARM : public AbstractMacroAssembler<ARMAssembler> {
+    static const int DoubleConditionMask = 0x0f;
+    static const int DoubleConditionBitSpecial = 0x10;
+    COMPILE_ASSERT(!(DoubleConditionBitSpecial & DoubleConditionMask), DoubleConditionBitSpecial_should_not_interfere_with_ARMAssembler_Condition_codes);
 public:
     enum Condition {
         Equal = ARMAssembler::EQ,
@@ -57,14 +60,24 @@ public:
     };
 
     enum DoubleCondition {
+        // These conditions will only evaluate to true if the comparison is ordered - i.e. neither operand is NaN.
         DoubleEqual = ARMAssembler::EQ,
+        DoubleNotEqual = ARMAssembler::NE | DoubleConditionBitSpecial,
         DoubleGreaterThan = ARMAssembler::GT,
         DoubleGreaterThanOrEqual = ARMAssembler::GE,
-        DoubleLessThan = ARMAssembler::LT,
-        DoubleLessThanOrEqual = ARMAssembler::LE,
+        DoubleLessThan = ARMAssembler::CC,
+        DoubleLessThanOrEqual = ARMAssembler::LS,
+        // If either operand is NaN, these conditions always evaluate to true.
+        DoubleEqualOrUnordered = ARMAssembler::EQ | DoubleConditionBitSpecial,
+        DoubleNotEqualOrUnordered = ARMAssembler::NE,
+        DoubleGreaterThanOrUnordered = ARMAssembler::HI,
+        DoubleGreaterThanOrEqualOrUnordered = ARMAssembler::CS,
+        DoubleLessThanOrUnordered = ARMAssembler::LT,
+        DoubleLessThanOrEqualOrUnordered = ARMAssembler::LE,
     };
 
     static const RegisterID stackPointerRegister = ARMRegisters::sp;
+    static const RegisterID linkRegister = ARMRegisters::lr;
 
     static const Scale ScalePtr = TimesFour;
 
@@ -105,14 +118,18 @@ public:
             m_assembler.ands_r(dest, dest, w);
     }
 
-    void lshift32(Imm32 imm, RegisterID dest)
+    void lshift32(RegisterID shift_amount, RegisterID dest)
     {
-        m_assembler.movs_r(dest, m_assembler.lsl(dest, imm.m_value & 0x1f));
+        ARMWord w = ARMAssembler::getOp2(0x1f);
+        ASSERT(w != ARMAssembler::INVALID_IMM);
+        m_assembler.and_r(ARMRegisters::S0, shift_amount, w);
+
+        m_assembler.movs_r(dest, m_assembler.lsl_r(dest, ARMRegisters::S0));
     }
 
-    void lshift32(RegisterID shift_amount, RegisterID dest)
+    void lshift32(Imm32 imm, RegisterID dest)
     {
-        m_assembler.movs_r(dest, m_assembler.lsl_r(dest, shift_amount));
+        m_assembler.movs_r(dest, m_assembler.lsl(dest, imm.m_value & 0x1f));
     }
 
     void mul32(RegisterID src, RegisterID dest)
@@ -130,6 +147,11 @@ public:
         m_assembler.muls_r(dest, src, ARMRegisters::S0);
     }
 
+    void neg32(RegisterID srcDest)
+    {
+        m_assembler.rsbs_r(srcDest, srcDest, ARMAssembler::getOp2(0));
+    }
+
     void not32(RegisterID dest)
     {
         m_assembler.mvns_r(dest, dest);
@@ -147,7 +169,11 @@ public:
 
     void rshift32(RegisterID shift_amount, RegisterID dest)
     {
-        m_assembler.movs_r(dest, m_assembler.asr_r(dest, shift_amount));
+        ARMWord w = ARMAssembler::getOp2(0x1f);
+        ASSERT(w != ARMAssembler::INVALID_IMM);
+        m_assembler.and_r(ARMRegisters::S0, shift_amount, w);
+
+        m_assembler.movs_r(dest, m_assembler.asr_r(dest, ARMRegisters::S0));
     }
 
     void rshift32(Imm32 imm, RegisterID dest)
@@ -198,7 +224,7 @@ public:
         m_assembler.baseIndexTransfer32(true, dest, address.base, address.index, static_cast<int>(address.scale), address.offset);
     }
 
-#if defined(ARM_REQUIRE_NATURAL_ALIGNMENT) && ARM_REQUIRE_NATURAL_ALIGNMENT
+#if CPU(ARMV5_OR_LOWER)
     void load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest);
 #else
     void load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest)
@@ -504,6 +530,13 @@ public:
         return Jump(m_assembler.jmp(ARMCondition(cond)));
     }
 
+    Jump branchOr32(Condition cond, RegisterID src, RegisterID dest)
+    {
+        ASSERT((cond == Signed) || (cond == Zero) || (cond == NonZero));
+        or32(src, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
     void breakpoint()
     {
         m_assembler.bkpt(0);
@@ -530,7 +563,7 @@ public:
 
     void ret()
     {
-        pop(ARMRegisters::pc);
+        m_assembler.mov_r(ARMRegisters::pc, linkRegister);
     }
 
     void set32(Condition cond, RegisterID left, RegisterID right, RegisterID dest)
@@ -547,6 +580,25 @@ public:
         m_assembler.mov_r(dest, ARMAssembler::getOp2(1), ARMCondition(cond));
     }
 
+    void set8(Condition cond, RegisterID left, RegisterID right, RegisterID dest)
+    {
+        // ARM doesn't have byte registers
+        set32(cond, left, right, dest);
+    }
+
+    void set8(Condition cond, Address left, RegisterID right, RegisterID dest)
+    {
+        // ARM doesn't have byte registers
+        load32(left, ARMRegisters::S1);
+        set32(cond, ARMRegisters::S1, right, dest);
+    }
+
+    void set8(Condition cond, RegisterID left, Imm32 right, RegisterID dest)
+    {
+        // ARM doesn't have byte registers
+        set32(cond, left, right, dest);
+    }
+
     void setTest32(Condition cond, Address address, Imm32 mask, RegisterID dest)
     {
         load32(address, ARMRegisters::S1);
@@ -558,6 +610,12 @@ public:
         m_assembler.mov_r(dest, ARMAssembler::getOp2(1), ARMCondition(cond));
     }
 
+    void setTest8(Condition cond, Address address, Imm32 mask, RegisterID dest)
+    {
+        // ARM doesn't have byte registers
+        setTest32(cond, address, mask, dest);
+    }
+
     void add32(Imm32 imm, RegisterID src, RegisterID dest)
     {
         m_assembler.add_r(dest, src, m_assembler.getImm(imm.m_value, ARMRegisters::S0));
@@ -665,6 +723,12 @@ public:
         m_assembler.doubleTransfer(true, dest, address.base, address.offset);
     }
 
+    void loadDouble(void* address, FPRegisterID dest)
+    {
+        m_assembler.ldr_un_imm(ARMRegisters::S0, (ARMWord)address);
+        m_assembler.fdtr_u(true, dest, ARMRegisters::S0, 0);
+    }
+
     void storeDouble(FPRegisterID src, ImplicitAddress address)
     {
         m_assembler.doubleTransfer(false, src, address.base, address.offset);
@@ -681,6 +745,18 @@ public:
         addDouble(ARMRegisters::SD0, dest);
     }
 
+    void divDouble(FPRegisterID src, FPRegisterID dest)
+    {
+        m_assembler.fdivd_r(dest, dest, src);
+    }
+
+    void divDouble(Address src, FPRegisterID dest)
+    {
+        ASSERT_NOT_REACHED(); // Untested
+        loadDouble(src, ARMRegisters::SD0);
+        divDouble(ARMRegisters::SD0, dest);
+    }
+
     void subDouble(FPRegisterID src, FPRegisterID dest)
     {
         m_assembler.fsubd_r(dest, dest, src);
@@ -709,11 +785,30 @@ public:
         m_assembler.fsitod_r(dest, dest);
     }
 
+    void convertInt32ToDouble(Address src, FPRegisterID dest)
+    {
+        ASSERT_NOT_REACHED(); // Untested
+        // flds does not worth the effort here
+        load32(src, ARMRegisters::S1);
+        convertInt32ToDouble(ARMRegisters::S1, dest);
+    }
+
+    void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
+    {
+        ASSERT_NOT_REACHED(); // Untested
+        // flds does not worth the effort here
+        m_assembler.ldr_un_imm(ARMRegisters::S1, (ARMWord)src.m_ptr);
+        m_assembler.dtr_u(true, ARMRegisters::S1, ARMRegisters::S1, 0);
+        convertInt32ToDouble(ARMRegisters::S1, dest);
+    }
+
     Jump branchDouble(DoubleCondition cond, FPRegisterID left, FPRegisterID right)
     {
         m_assembler.fcmpd_r(left, right);
         m_assembler.fmstat();
-        return Jump(m_assembler.jmp(static_cast<ARMAssembler::Condition>(cond)));
+        if (cond & DoubleConditionBitSpecial)
+            m_assembler.cmp_r(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::VS);
+        return Jump(m_assembler.jmp(static_cast<ARMAssembler::Condition>(cond & ~DoubleConditionMask)));
     }
 
     // Truncates 'src' to an integer, and places the resulting 'dest'.
@@ -728,6 +823,29 @@ public:
         return jump();
     }
 
+    // Convert 'src' to an integer, and places the resulting 'dest'.
+    // If the result is not representable as a 32 bit value, branch.
+    // May also branch for some values that are representable in 32 bits
+    // (specifically, in this case, 0).
+    void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID fpTemp)
+    {
+        m_assembler.ftosid_r(ARMRegisters::SD0, src);
+        m_assembler.fmrs_r(dest, ARMRegisters::SD0);
+
+        // Convert the integer result back to float & compare to the original value - if not equal or unordered (NaN) then jump.
+        m_assembler.fsitod_r(ARMRegisters::SD0, ARMRegisters::SD0);
+        failureCases.append(branchDouble(DoubleNotEqualOrUnordered, src, ARMRegisters::SD0));
+
+        // If the result is zero, it might have been -0.0, and 0.0 equals to -0.0
+        failureCases.append(branchTest32(Zero, dest));
+    }
+
+    void zeroDouble(FPRegisterID srcDest)
+    {
+        m_assembler.mov_r(ARMRegisters::S0, ARMAssembler::getOp2(0));
+        convertInt32ToDouble(ARMRegisters::S0, srcDest);
+    }
+
 protected:
     ARMAssembler::Condition ARMCondition(Condition cond)
     {
@@ -746,11 +864,9 @@ protected:
 
     void prepareCall()
     {
-        ensureSpace(3 * sizeof(ARMWord), sizeof(ARMWord));
+        ensureSpace(2 * sizeof(ARMWord), sizeof(ARMWord));
 
-        // S0 might be used for parameter passing
-        m_assembler.add_r(ARMRegisters::S1, ARMRegisters::pc, ARMAssembler::OP2_IMM | 0x4);
-        m_assembler.push_r(ARMRegisters::S1);
+        m_assembler.mov_r(linkRegister, ARMRegisters::pc);
     }
 
     void call32(RegisterID base, int32_t offset)
@@ -812,6 +928,6 @@ private:
 
 }
 
-#endif // ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
+#endif // ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
 
 #endif // MacroAssemblerARM_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARMv7.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARMv7.h
index a549604..532a9cf 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARMv7.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerARMv7.h
@@ -93,13 +93,21 @@ public:
         Zero = ARMv7Assembler::ConditionEQ,
         NonZero = ARMv7Assembler::ConditionNE
     };
-
     enum DoubleCondition {
+        // These conditions will only evaluate to true if the comparison is ordered - i.e. neither operand is NaN.
         DoubleEqual = ARMv7Assembler::ConditionEQ,
+        DoubleNotEqual = ARMv7Assembler::ConditionVC, // Not the right flag! check for this & handle differently.
         DoubleGreaterThan = ARMv7Assembler::ConditionGT,
         DoubleGreaterThanOrEqual = ARMv7Assembler::ConditionGE,
         DoubleLessThan = ARMv7Assembler::ConditionLO,
         DoubleLessThanOrEqual = ARMv7Assembler::ConditionLS,
+        // If either operand is NaN, these conditions always evaluate to true.
+        DoubleEqualOrUnordered = ARMv7Assembler::ConditionVS, // Not the right flag! check for this & handle differently.
+        DoubleNotEqualOrUnordered = ARMv7Assembler::ConditionNE,
+        DoubleGreaterThanOrUnordered = ARMv7Assembler::ConditionHI,
+        DoubleGreaterThanOrEqualOrUnordered = ARMv7Assembler::ConditionHS,
+        DoubleLessThanOrUnordered = ARMv7Assembler::ConditionLT,
+        DoubleLessThanOrEqualOrUnordered = ARMv7Assembler::ConditionLE,
     };
 
     static const RegisterID stackPointerRegister = ARMRegisters::sp;
@@ -189,14 +197,19 @@ public:
         }
     }
 
-    void lshift32(Imm32 imm, RegisterID dest)
+    void lshift32(RegisterID shift_amount, RegisterID dest)
     {
-        m_assembler.lsl(dest, dest, imm.m_value);
+        // Clamp the shift to the range 0..31
+        ARMThumbImmediate armImm = ARMThumbImmediate::makeEncodedImm(0x1f);
+        ASSERT(armImm.isValid());
+        m_assembler.ARM_and(dataTempRegister, shift_amount, armImm);
+
+        m_assembler.lsl(dest, dest, dataTempRegister);
     }
 
-    void lshift32(RegisterID shift_amount, RegisterID dest)
+    void lshift32(Imm32 imm, RegisterID dest)
     {
-        m_assembler.lsl(dest, dest, shift_amount);
+        m_assembler.lsl(dest, dest, imm.m_value & 0x1f);
     }
 
     void mul32(RegisterID src, RegisterID dest)
@@ -233,12 +246,17 @@ public:
 
     void rshift32(RegisterID shift_amount, RegisterID dest)
     {
-        m_assembler.asr(dest, dest, shift_amount);
+        // Clamp the shift to the range 0..31
+        ARMThumbImmediate armImm = ARMThumbImmediate::makeEncodedImm(0x1f);
+        ASSERT(armImm.isValid());
+        m_assembler.ARM_and(dataTempRegister, shift_amount, armImm);
+
+        m_assembler.asr(dest, dest, dataTempRegister);
     }
 
     void rshift32(Imm32 imm, RegisterID dest)
     {
-        m_assembler.asr(dest, dest, imm.m_value);
+        m_assembler.asr(dest, dest, imm.m_value & 0x1f);
     }
 
     void sub32(RegisterID src, RegisterID dest)
@@ -531,6 +549,23 @@ public:
     {
         m_assembler.vcmp_F64(left, right);
         m_assembler.vmrs_APSR_nzcv_FPSCR();
+
+        if (cond == DoubleNotEqual) {
+            // ConditionNE jumps if NotEqual *or* unordered - force the unordered cases not to jump.
+            Jump unordered = makeBranch(ARMv7Assembler::ConditionVS);
+            Jump result = makeBranch(ARMv7Assembler::ConditionNE);
+            unordered.link(this);
+            return result;
+        }
+        if (cond == DoubleEqualOrUnordered) {
+            Jump unordered = makeBranch(ARMv7Assembler::ConditionVS);
+            Jump notEqual = makeBranch(ARMv7Assembler::ConditionNE);
+            unordered.link(this);
+            // We get here if either unordered, or equal.
+            Jump result = makeJump();
+            notEqual.link(this);
+            return result;
+        }
         return makeBranch(cond);
     }
 
@@ -990,13 +1025,15 @@ public:
 protected:
     ARMv7Assembler::JmpSrc makeJump()
     {
-        return m_assembler.b();
+        moveFixedWidthEncoding(Imm32(0), dataTempRegister);
+        return m_assembler.bx(dataTempRegister);
     }
 
     ARMv7Assembler::JmpSrc makeBranch(ARMv7Assembler::Condition cond)
     {
-        m_assembler.it(cond);
-        return m_assembler.b();
+        m_assembler.it(cond, true, true);
+        moveFixedWidthEncoding(Imm32(0), dataTempRegister);
+        return m_assembler.bx(dataTempRegister);
     }
     ARMv7Assembler::JmpSrc makeBranch(Condition cond) { return makeBranch(armV7Condition(cond)); }
     ARMv7Assembler::JmpSrc makeBranch(DoubleCondition cond) { return makeBranch(armV7Condition(cond)); }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerCodeRef.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerCodeRef.h
index 568260a..cae8bf6 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerCodeRef.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerCodeRef.h
@@ -37,7 +37,7 @@
 
 // ASSERT_VALID_CODE_POINTER checks that ptr is a non-null pointer, and that it is a valid
 // instruction address on the platform (for example, check any alignment requirements).
-#if PLATFORM(ARM_THUMB2)
+#if CPU(ARM_THUMB2)
 // ARM/thumb instructions must be 16-bit aligned, but all code pointers to be loaded
 // into the processor are decorated with the bottom bit set, indicating that this is
 // thumb code (as oposed to 32-bit traditional ARM).  The first test checks for both
@@ -69,7 +69,13 @@ public:
 
     template<typename FunctionType>
     explicit FunctionPtr(FunctionType* value)
+#if COMPILER(RVCT)
+     // RVTC compiler needs C-style cast as it fails with the following error
+     // Error:  #694: reinterpret_cast cannot cast away const or other type qualifiers
+        : m_value((void*)(value))
+#else
         : m_value(reinterpret_cast<void*>(value))
+#endif
     {
         ASSERT_VALID_CODE_POINTER(m_value);
     }
@@ -124,7 +130,7 @@ public:
     }
 
     explicit MacroAssemblerCodePtr(void* value)
-#if PLATFORM(ARM_THUMB2)
+#if CPU(ARM_THUMB2)
         // Decorate the pointer as a thumb code pointer.
         : m_value(reinterpret_cast<char*>(value) + 1)
 #else
@@ -141,7 +147,7 @@ public:
     }
 
     void* executableAddress() const { return m_value; }
-#if PLATFORM(ARM_THUMB2)
+#if CPU(ARM_THUMB2)
     // To use this pointer as a data address remove the decoration.
     void* dataLocation() const { ASSERT_VALID_CODE_POINTER(m_value); return reinterpret_cast<char*>(m_value) - 1; }
 #else
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86.h
index 6e96240..ca7c31a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86.h
@@ -28,7 +28,7 @@
 
 #include <wtf/Platform.h>
 
-#if ENABLE(ASSEMBLER) && PLATFORM(X86)
+#if ENABLE(ASSEMBLER) && CPU(X86)
 
 #include "MacroAssemblerX86Common.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86Common.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86Common.h
index 5ebefa7..449df86 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86Common.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86Common.h
@@ -36,6 +36,10 @@
 namespace JSC {
 
 class MacroAssemblerX86Common : public AbstractMacroAssembler<X86Assembler> {
+    static const int DoubleConditionBitInvert = 0x10;
+    static const int DoubleConditionBitSpecial = 0x20;
+    static const int DoubleConditionBits = DoubleConditionBitInvert | DoubleConditionBitSpecial;
+
 public:
 
     enum Condition {
@@ -56,13 +60,24 @@ public:
     };
 
     enum DoubleCondition {
-        DoubleEqual = X86Assembler::ConditionE,
+        // These conditions will only evaluate to true if the comparison is ordered - i.e. neither operand is NaN.
+        DoubleEqual = X86Assembler::ConditionE | DoubleConditionBitSpecial,
         DoubleNotEqual = X86Assembler::ConditionNE,
         DoubleGreaterThan = X86Assembler::ConditionA,
         DoubleGreaterThanOrEqual = X86Assembler::ConditionAE,
-        DoubleLessThan = X86Assembler::ConditionB,
-        DoubleLessThanOrEqual = X86Assembler::ConditionBE,
+        DoubleLessThan = X86Assembler::ConditionA | DoubleConditionBitInvert,
+        DoubleLessThanOrEqual = X86Assembler::ConditionAE | DoubleConditionBitInvert,
+        // If either operand is NaN, these conditions always evaluate to true.
+        DoubleEqualOrUnordered = X86Assembler::ConditionE,
+        DoubleNotEqualOrUnordered = X86Assembler::ConditionNE | DoubleConditionBitSpecial,
+        DoubleGreaterThanOrUnordered = X86Assembler::ConditionB | DoubleConditionBitInvert,
+        DoubleGreaterThanOrEqualOrUnordered = X86Assembler::ConditionBE | DoubleConditionBitInvert,
+        DoubleLessThanOrUnordered = X86Assembler::ConditionB,
+        DoubleLessThanOrEqualOrUnordered = X86Assembler::ConditionBE,
     };
+    COMPILE_ASSERT(
+        !((X86Assembler::ConditionE | X86Assembler::ConditionNE | X86Assembler::ConditionA | X86Assembler::ConditionAE | X86Assembler::ConditionB | X86Assembler::ConditionBE) & DoubleConditionBits),
+        DoubleConditionBits_should_not_interfere_with_X86Assembler_Condition_codes);
 
     static const RegisterID stackPointerRegister = X86Registers::esp;
 
@@ -416,20 +431,35 @@ public:
 
     void convertInt32ToDouble(Address src, FPRegisterID dest)
     {
+        ASSERT(isSSE2Present());
         m_assembler.cvtsi2sd_mr(src.offset, src.base, dest);
     }
 
     Jump branchDouble(DoubleCondition cond, FPRegisterID left, FPRegisterID right)
     {
         ASSERT(isSSE2Present());
-        m_assembler.ucomisd_rr(right, left);
-        return Jump(m_assembler.jCC(x86Condition(cond)));
-    }
 
-    Jump branchDouble(DoubleCondition cond, FPRegisterID left, Address right)
-    {
-        m_assembler.ucomisd_mr(right.offset, right.base, left);
-        return Jump(m_assembler.jCC(x86Condition(cond)));
+        if (cond & DoubleConditionBitInvert)
+            m_assembler.ucomisd_rr(left, right);
+        else
+            m_assembler.ucomisd_rr(right, left);
+
+        if (cond == DoubleEqual) {
+            Jump isUnordered(m_assembler.jp());
+            Jump result = Jump(m_assembler.je());
+            isUnordered.link(this);
+            return result;
+        } else if (cond == DoubleNotEqualOrUnordered) {
+            Jump isUnordered(m_assembler.jp());
+            Jump isEqual(m_assembler.je());
+            isUnordered.link(this);
+            Jump result = jump();
+            isEqual.link(this);
+            return result;
+        }
+
+        ASSERT(!(cond & DoubleConditionBitSpecial));
+        return Jump(m_assembler.jCC(static_cast<X86Assembler::Condition>(cond & ~DoubleConditionBits)));
     }
 
     // Truncates 'src' to an integer, and places the resulting 'dest'.
@@ -443,6 +473,25 @@ public:
         return branch32(Equal, dest, Imm32(0x80000000));
     }
 
+    // Convert 'src' to an integer, and places the resulting 'dest'.
+    // If the result is not representable as a 32 bit value, branch.
+    // May also branch for some values that are representable in 32 bits
+    // (specifically, in this case, 0).
+    void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID fpTemp)
+    {
+        ASSERT(isSSE2Present());
+        m_assembler.cvttsd2si_rr(src, dest);
+
+        // If the result is zero, it might have been -0.0, and the double comparison won't catch this!
+        failureCases.append(branchTest32(Zero, dest));
+
+        // Convert the integer result back to float & compare to the original value - if not equal or unordered (NaN) then jump.
+        convertInt32ToDouble(dest, fpTemp);
+        m_assembler.ucomisd_rr(fpTemp, src);
+        failureCases.append(m_assembler.jp());
+        failureCases.append(m_assembler.jne());
+    }
+
     void zeroDouble(FPRegisterID srcDest)
     {
         ASSERT(isSSE2Present());
@@ -493,7 +542,7 @@ public:
             m_assembler.movl_i32r(imm.m_value, dest);
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void move(RegisterID src, RegisterID dest)
     {
         // Note: on 64-bit this is is a full register move; perhaps it would be
@@ -509,7 +558,8 @@ public:
 
     void swap(RegisterID reg1, RegisterID reg2)
     {
-        m_assembler.xchgq_rr(reg1, reg2);
+        if (reg1 != reg2)
+            m_assembler.xchgq_rr(reg1, reg2);
     }
 
     void signExtend32ToPtr(RegisterID src, RegisterID dest)
@@ -889,18 +939,13 @@ protected:
         return static_cast<X86Assembler::Condition>(cond);
     }
 
-    X86Assembler::Condition x86Condition(DoubleCondition cond)
-    {
-        return static_cast<X86Assembler::Condition>(cond);
-    }
-
 private:
     // Only MacroAssemblerX86 should be using the following method; SSE2 is always available on
     // x86_64, and clients & subclasses of MacroAssembler should be using 'supportsFloatingPoint()'.
     friend class MacroAssemblerX86;
 
-#if PLATFORM(X86)
-#if PLATFORM(MAC)
+#if CPU(X86)
+#if OS(MAC_OS_X)
 
     // All X86 Macs are guaranteed to support at least SSE2,
     static bool isSSE2Present()
@@ -908,7 +953,7 @@ private:
         return true;
     }
 
-#else // PLATFORM(MAC)
+#else // OS(MAC_OS_X)
 
     enum SSE2CheckState {
         NotCheckedSSE2,
@@ -951,8 +996,8 @@ private:
     
     static SSE2CheckState s_sse2CheckState;
 
-#endif // PLATFORM(MAC)
-#elif !defined(NDEBUG) // PLATFORM(X86)
+#endif // OS(MAC_OS_X)
+#elif !defined(NDEBUG) // CPU(X86)
 
     // On x86-64 we should never be checking for SSE2 in a non-debug build,
     // but non debug add this method to keep the asserts above happy.
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86_64.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86_64.h
index 0f95fe6..ec93f8c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86_64.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/MacroAssemblerX86_64.h
@@ -28,7 +28,7 @@
 
 #include <wtf/Platform.h>
 
-#if ENABLE(ASSEMBLER) && PLATFORM(X86_64)
+#if ENABLE(ASSEMBLER) && CPU(X86_64)
 
 #include "MacroAssemblerX86Common.h"
 
@@ -192,33 +192,6 @@ public:
         m_assembler.orq_ir(imm.m_value, dest);
     }
 
-    void rshiftPtr(RegisterID shift_amount, RegisterID dest)
-    {
-        // On x86 we can only shift by ecx; if asked to shift by another register we'll
-        // need rejig the shift amount into ecx first, and restore the registers afterwards.
-        if (shift_amount != X86Registers::ecx) {
-            swap(shift_amount, X86Registers::ecx);
-
-            // E.g. transform "shll %eax, %eax" -> "xchgl %eax, %ecx; shll %ecx, %ecx; xchgl %eax, %ecx"
-            if (dest == shift_amount)
-                m_assembler.sarq_CLr(X86Registers::ecx);
-            // E.g. transform "shll %eax, %ecx" -> "xchgl %eax, %ecx; shll %ecx, %eax; xchgl %eax, %ecx"
-            else if (dest == X86Registers::ecx)
-                m_assembler.sarq_CLr(shift_amount);
-            // E.g. transform "shll %eax, %ebx" -> "xchgl %eax, %ecx; shll %ecx, %ebx; xchgl %eax, %ecx"
-            else
-                m_assembler.sarq_CLr(dest);
-        
-            swap(shift_amount, X86Registers::ecx);
-        } else
-            m_assembler.sarq_CLr(dest);
-    }
-
-    void rshiftPtr(Imm32 imm, RegisterID dest)
-    {
-        m_assembler.sarq_i8r(imm.m_value, dest);
-    }
-
     void subPtr(RegisterID src, RegisterID dest)
     {
         m_assembler.subq_rr(src, dest);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/X86Assembler.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/X86Assembler.h
index cbbaaa5..ab3d05f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/X86Assembler.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/X86Assembler.h
@@ -28,7 +28,7 @@
 
 #include <wtf/Platform.h>
 
-#if ENABLE(ASSEMBLER) && (PLATFORM(X86) || PLATFORM(X86_64))
+#if ENABLE(ASSEMBLER) && (CPU(X86) || CPU(X86_64))
 
 #include "AssemblerBuffer.h"
 #include <stdint.h>
@@ -50,7 +50,7 @@ namespace X86Registers {
         esi,
         edi,
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         r8,
         r9,
         r10,
@@ -118,12 +118,12 @@ private:
         OP_XOR_GvEv                     = 0x33,
         OP_CMP_EvGv                     = 0x39,
         OP_CMP_GvEv                     = 0x3B,
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         PRE_REX                         = 0x40,
 #endif
         OP_PUSH_EAX                     = 0x50,
         OP_POP_EAX                      = 0x58,
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         OP_MOVSXD_GvEv                  = 0x63,
 #endif
         PRE_OPERAND_SIZE                = 0x66,
@@ -296,7 +296,7 @@ public:
 
     // Arithmetic operations:
 
-#if !PLATFORM(X86_64)
+#if !CPU(X86_64)
     void adcl_im(int imm, void* addr)
     {
         if (CAN_SIGN_EXTEND_8_32(imm)) {
@@ -346,7 +346,7 @@ public:
         }
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void addq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_ADD_EvGv, src, dst);
@@ -423,7 +423,7 @@ public:
         }
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void andq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_AND_EvGv, src, dst);
@@ -509,7 +509,7 @@ public:
         }
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void orq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_OR_EvGv, src, dst);
@@ -575,7 +575,7 @@ public:
         }
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void subq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_SUB_EvGv, src, dst);
@@ -641,7 +641,7 @@ public:
         }
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void xorq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_XOR_EvGv, src, dst);
@@ -689,7 +689,7 @@ public:
         m_formatter.oneByteOp(OP_GROUP2_EvCL, GROUP2_OP_SHL, dst);
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void sarq_CLr(RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_GROUP2_EvCL, GROUP2_OP_SAR, dst);
@@ -789,7 +789,7 @@ public:
         m_formatter.immediate32(imm);
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void cmpq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_CMP_EvGv, src, dst);
@@ -897,7 +897,7 @@ public:
         m_formatter.immediate32(imm);
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void testq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_TEST_EvGv, src, dst);
@@ -971,7 +971,7 @@ public:
         m_formatter.oneByteOp(OP_XCHG_EvGv, src, dst);
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void xchgq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_XCHG_EvGv, src, dst);
@@ -1001,7 +1001,7 @@ public:
     void movl_mEAX(void* addr)
     {
         m_formatter.oneByteOp(OP_MOV_EAXOv);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         m_formatter.immediate64(reinterpret_cast<int64_t>(addr));
 #else
         m_formatter.immediate32(reinterpret_cast<int>(addr));
@@ -1038,14 +1038,14 @@ public:
     void movl_EAXm(void* addr)
     {
         m_formatter.oneByteOp(OP_MOV_OvEAX);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         m_formatter.immediate64(reinterpret_cast<int64_t>(addr));
 #else
         m_formatter.immediate32(reinterpret_cast<int>(addr));
 #endif
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void movq_rr(RegisterID src, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_MOV_EvGv, src, dst);
@@ -1157,7 +1157,7 @@ public:
     {
         m_formatter.oneByteOp(OP_LEA, dst, base, offset);
     }
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void leaq_mr(int offset, RegisterID base, RegisterID dst)
     {
         m_formatter.oneByteOp64(OP_LEA, dst, base, offset);
@@ -1323,7 +1323,7 @@ public:
         m_formatter.twoByteOp(OP2_CVTSI2SD_VsdEd, (RegisterID)dst, base, offset);
     }
 
-#if !PLATFORM(X86_64)
+#if !CPU(X86_64)
     void cvtsi2sd_mr(void* address, XMMRegisterID dst)
     {
         m_formatter.prefix(PRE_SSE_F2);
@@ -1343,7 +1343,7 @@ public:
         m_formatter.twoByteOp(OP2_MOVD_EdVd, (RegisterID)src, dst);
     }
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     void movq_rr(XMMRegisterID src, RegisterID dst)
     {
         m_formatter.prefix(PRE_SSE_66);
@@ -1369,7 +1369,7 @@ public:
         m_formatter.twoByteOp(OP2_MOVSD_VsdWsd, (RegisterID)dst, base, offset);
     }
 
-#if !PLATFORM(X86_64)
+#if !CPU(X86_64)
     void movsd_mr(void* address, XMMRegisterID dst)
     {
         m_formatter.prefix(PRE_SSE_F2);
@@ -1535,7 +1535,7 @@ public:
 
     static void repatchLoadPtrToLEA(void* where)
     {
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         // On x86-64 pointer memory accesses require a 64-bit operand, and as such a REX prefix.
         // Skip over the prefix byte.
         where = reinterpret_cast<char*>(where) + 1;
@@ -1679,7 +1679,7 @@ private:
             memoryModRM(reg, base, index, scale, offset);
         }
 
-#if !PLATFORM(X86_64)
+#if !CPU(X86_64)
         void oneByteOp(OneByteOpcodeID opcode, int reg, void* address)
         {
             m_buffer.ensureSpace(maxInstructionSize);
@@ -1722,7 +1722,7 @@ private:
             memoryModRM(reg, base, index, scale, offset);
         }
 
-#if !PLATFORM(X86_64)
+#if !CPU(X86_64)
         void twoByteOp(TwoByteOpcodeID opcode, int reg, void* address)
         {
             m_buffer.ensureSpace(maxInstructionSize);
@@ -1732,7 +1732,7 @@ private:
         }
 #endif
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         // Quad-word-sized operands:
         //
         // Used to format 64-bit operantions, planting a REX.w prefix.
@@ -1891,7 +1891,7 @@ private:
         static const RegisterID noBase = X86Registers::ebp;
         static const RegisterID hasSib = X86Registers::esp;
         static const RegisterID noIndex = X86Registers::esp;
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         static const RegisterID noBase2 = X86Registers::r13;
         static const RegisterID hasSib2 = X86Registers::r12;
 
@@ -1967,7 +1967,7 @@ private:
         void memoryModRM(int reg, RegisterID base, int offset)
         {
             // A base of esp or r12 would be interpreted as a sib, so force a sib with no index & put the base in there.
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
             if ((base == hasSib) || (base == hasSib2)) {
 #else
             if (base == hasSib) {
@@ -1982,7 +1982,7 @@ private:
                     m_buffer.putIntUnchecked(offset);
                 }
             } else {
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
                 if (!offset && (base != noBase) && (base != noBase2))
 #else
                 if (!offset && (base != noBase))
@@ -2001,7 +2001,7 @@ private:
         void memoryModRM_disp32(int reg, RegisterID base, int offset)
         {
             // A base of esp or r12 would be interpreted as a sib, so force a sib with no index & put the base in there.
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
             if ((base == hasSib) || (base == hasSib2)) {
 #else
             if (base == hasSib) {
@@ -2018,7 +2018,7 @@ private:
         {
             ASSERT(index != noIndex);
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
             if (!offset && (base != noBase) && (base != noBase2))
 #else
             if (!offset && (base != noBase))
@@ -2033,7 +2033,7 @@ private:
             }
         }
 
-#if !PLATFORM(X86_64)
+#if !CPU(X86_64)
         void memoryModRM(int reg, void* address)
         {
             // noBase + ModRmMemoryNoDisp means noBase + ModRmMemoryDisp32!
@@ -2048,6 +2048,6 @@ private:
 
 } // namespace JSC
 
-#endif // ENABLE(ASSEMBLER) && PLATFORM(X86)
+#endif // ENABLE(ASSEMBLER) && CPU(X86)
 
 #endif // X86Assembler_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.cpp
index 7e5f6cf..2256583 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.cpp
@@ -51,7 +51,7 @@ static UString escapeQuotes(const UString& str)
     UString result = str;
     int pos = 0;
     while ((pos = result.find('\"', pos)) >= 0) {
-        result = result.substr(0, pos) + "\"\\\"\"" + result.substr(pos + 1);
+        result = makeString(result.substr(0, pos), "\"\\\"\"", result.substr(pos + 1));
         pos += 4;
     }
     return result;
@@ -62,49 +62,50 @@ static UString valueToSourceString(ExecState* exec, JSValue val)
     if (!val)
         return "0";
 
-    if (val.isString()) {
-        UString result("\"");
-        result += escapeQuotes(val.toString(exec)) + "\"";
-        return result;
-    } 
+    if (val.isString())
+        return makeString("\"", escapeQuotes(val.toString(exec)), "\"");
 
     return val.toString(exec);
 }
 
-static CString registerName(int r)
+static CString constantName(ExecState* exec, int k, JSValue value)
 {
-    if (r == missingThisObjectMarker())
-        return "<null>";
-
-    return (UString("r") + UString::from(r)).UTF8String();
+    return makeString(valueToSourceString(exec, value), "(@k", UString::from(k - FirstConstantRegisterIndex), ")").UTF8String();
 }
 
-static CString constantName(ExecState* exec, int k, JSValue value)
+static CString idName(int id0, const Identifier& ident)
 {
-    return (valueToSourceString(exec, value) + "(@k" + UString::from(k) + ")").UTF8String();
+    return makeString(ident.ustring(), "(@id", UString::from(id0), ")").UTF8String();
 }
 
-static CString idName(int id0, const Identifier& ident)
+CString CodeBlock::registerName(ExecState* exec, int r) const
 {
-    return (ident.ustring() + "(@id" + UString::from(id0) +")").UTF8String();
+    if (r == missingThisObjectMarker())
+        return "<null>";
+
+    if (isConstantRegisterIndex(r))
+        return constantName(exec, r, getConstant(r));
+
+    return makeString("r", UString::from(r)).UTF8String();
 }
 
 static UString regexpToSourceString(RegExp* regExp)
 {
-    UString pattern = UString("/") + regExp->pattern() + "/";
+    char postfix[5] = { '/', 0, 0, 0, 0 };
+    int index = 1;
     if (regExp->global())
-        pattern += "g";
+        postfix[index++] = 'g';
     if (regExp->ignoreCase())
-        pattern += "i";
+        postfix[index++] = 'i';
     if (regExp->multiline())
-        pattern += "m";
+        postfix[index] = 'm';
 
-    return pattern;
+    return makeString("/", regExp->pattern(), postfix);
 }
 
 static CString regexpName(int re, RegExp* regexp)
 {
-    return (regexpToSourceString(regexp) + "(@re" + UString::from(re) + ")").UTF8String();
+    return makeString(regexpToSourceString(regexp), "(@re", UString::from(re), ")").UTF8String();
 }
 
 static UString pointerToSourceString(void* p)
@@ -135,49 +136,44 @@ NEVER_INLINE static const char* debugHookName(int debugHookID)
     return "";
 }
 
-static int locationForOffset(const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator& it, int offset)
-{
-    return it - begin + offset;
-}
-
-static void printUnaryOp(int location, Vector<Instruction>::const_iterator& it, const char* op)
+void CodeBlock::printUnaryOp(ExecState* exec, int location, Vector<Instruction>::const_iterator& it, const char* op) const
 {
     int r0 = (++it)->u.operand;
     int r1 = (++it)->u.operand;
 
-    printf("[%4d] %s\t\t %s, %s\n", location, op, registerName(r0).c_str(), registerName(r1).c_str());
+    printf("[%4d] %s\t\t %s, %s\n", location, op, registerName(exec, r0).c_str(), registerName(exec, r1).c_str());
 }
 
-static void printBinaryOp(int location, Vector<Instruction>::const_iterator& it, const char* op)
+void CodeBlock::printBinaryOp(ExecState* exec, int location, Vector<Instruction>::const_iterator& it, const char* op) const
 {
     int r0 = (++it)->u.operand;
     int r1 = (++it)->u.operand;
     int r2 = (++it)->u.operand;
-    printf("[%4d] %s\t\t %s, %s, %s\n", location, op, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
+    printf("[%4d] %s\t\t %s, %s, %s\n", location, op, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), registerName(exec, r2).c_str());
 }
 
-static void printConditionalJump(const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator& it, int location, const char* op)
+void CodeBlock::printConditionalJump(ExecState* exec, const Vector<Instruction>::const_iterator&, Vector<Instruction>::const_iterator& it, int location, const char* op) const
 {
     int r0 = (++it)->u.operand;
     int offset = (++it)->u.operand;
-    printf("[%4d] %s\t\t %s, %d(->%d)\n", location, op, registerName(r0).c_str(), offset, locationForOffset(begin, it, offset));
+    printf("[%4d] %s\t\t %s, %d(->%d)\n", location, op, registerName(exec, r0).c_str(), offset, location + offset);
 }
 
-static void printGetByIdOp(int location, Vector<Instruction>::const_iterator& it, const Vector<Identifier>& m_identifiers, const char* op)
+void CodeBlock::printGetByIdOp(ExecState* exec, int location, Vector<Instruction>::const_iterator& it, const char* op) const
 {
     int r0 = (++it)->u.operand;
     int r1 = (++it)->u.operand;
     int id0 = (++it)->u.operand;
-    printf("[%4d] %s\t %s, %s, %s\n", location, op, registerName(r0).c_str(), registerName(r1).c_str(), idName(id0, m_identifiers[id0]).c_str());
+    printf("[%4d] %s\t %s, %s, %s\n", location, op, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), idName(id0, m_identifiers[id0]).c_str());
     it += 4;
 }
 
-static void printPutByIdOp(int location, Vector<Instruction>::const_iterator& it, const Vector<Identifier>& m_identifiers, const char* op)
+void CodeBlock::printPutByIdOp(ExecState* exec, int location, Vector<Instruction>::const_iterator& it, const char* op) const
 {
     int r0 = (++it)->u.operand;
     int id0 = (++it)->u.operand;
     int r1 = (++it)->u.operand;
-    printf("[%4d] %s\t %s, %s, %s\n", location, op, registerName(r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(r1).c_str());
+    printf("[%4d] %s\t %s, %s, %s\n", location, op, registerName(exec, r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(exec, r1).c_str());
     it += 4;
 }
 
@@ -362,7 +358,7 @@ void CodeBlock::dump(ExecState* exec) const
         unsigned registerIndex = m_numVars;
         size_t i = 0;
         do {
-            printf("   r%u = %s\n", registerIndex, valueToSourceString(exec, m_constantRegisters[i].jsValue()).ascii());
+            printf("   k%u = %s\n", registerIndex, valueToSourceString(exec, m_constantRegisters[i].jsValue()).ascii());
             ++i;
             ++registerIndex;
         } while (i < m_constantRegisters.size());
@@ -486,7 +482,7 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
         }
         case op_enter_with_activation: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] enter_with_activation %s\n", location, registerName(r0).c_str());
+            printf("[%4d] enter_with_activation %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_create_arguments: {
@@ -499,148 +495,148 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
         }
         case op_convert_this: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] convert_this %s\n", location, registerName(r0).c_str());
+            printf("[%4d] convert_this %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_new_object: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] new_object\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] new_object\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_new_array: {
             int dst = (++it)->u.operand;
             int argv = (++it)->u.operand;
             int argc = (++it)->u.operand;
-            printf("[%4d] new_array\t %s, %s, %d\n", location, registerName(dst).c_str(), registerName(argv).c_str(), argc);
+            printf("[%4d] new_array\t %s, %s, %d\n", location, registerName(exec, dst).c_str(), registerName(exec, argv).c_str(), argc);
             break;
         }
         case op_new_regexp: {
             int r0 = (++it)->u.operand;
             int re0 = (++it)->u.operand;
-            printf("[%4d] new_regexp\t %s, %s\n", location, registerName(r0).c_str(), regexpName(re0, regexp(re0)).c_str());
+            printf("[%4d] new_regexp\t %s, %s\n", location, registerName(exec, r0).c_str(), regexpName(re0, regexp(re0)).c_str());
             break;
         }
         case op_mov: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
-            printf("[%4d] mov\t\t %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str());
+            printf("[%4d] mov\t\t %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str());
             break;
         }
         case op_not: {
-            printUnaryOp(location, it, "not");
+            printUnaryOp(exec, location, it, "not");
             break;
         }
         case op_eq: {
-            printBinaryOp(location, it, "eq");
+            printBinaryOp(exec, location, it, "eq");
             break;
         }
         case op_eq_null: {
-            printUnaryOp(location, it, "eq_null");
+            printUnaryOp(exec, location, it, "eq_null");
             break;
         }
         case op_neq: {
-            printBinaryOp(location, it, "neq");
+            printBinaryOp(exec, location, it, "neq");
             break;
         }
         case op_neq_null: {
-            printUnaryOp(location, it, "neq_null");
+            printUnaryOp(exec, location, it, "neq_null");
             break;
         }
         case op_stricteq: {
-            printBinaryOp(location, it, "stricteq");
+            printBinaryOp(exec, location, it, "stricteq");
             break;
         }
         case op_nstricteq: {
-            printBinaryOp(location, it, "nstricteq");
+            printBinaryOp(exec, location, it, "nstricteq");
             break;
         }
         case op_less: {
-            printBinaryOp(location, it, "less");
+            printBinaryOp(exec, location, it, "less");
             break;
         }
         case op_lesseq: {
-            printBinaryOp(location, it, "lesseq");
+            printBinaryOp(exec, location, it, "lesseq");
             break;
         }
         case op_pre_inc: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] pre_inc\t\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] pre_inc\t\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_pre_dec: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] pre_dec\t\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] pre_dec\t\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_post_inc: {
-            printUnaryOp(location, it, "post_inc");
+            printUnaryOp(exec, location, it, "post_inc");
             break;
         }
         case op_post_dec: {
-            printUnaryOp(location, it, "post_dec");
+            printUnaryOp(exec, location, it, "post_dec");
             break;
         }
         case op_to_jsnumber: {
-            printUnaryOp(location, it, "to_jsnumber");
+            printUnaryOp(exec, location, it, "to_jsnumber");
             break;
         }
         case op_negate: {
-            printUnaryOp(location, it, "negate");
+            printUnaryOp(exec, location, it, "negate");
             break;
         }
         case op_add: {
-            printBinaryOp(location, it, "add");
+            printBinaryOp(exec, location, it, "add");
             ++it;
             break;
         }
         case op_mul: {
-            printBinaryOp(location, it, "mul");
+            printBinaryOp(exec, location, it, "mul");
             ++it;
             break;
         }
         case op_div: {
-            printBinaryOp(location, it, "div");
+            printBinaryOp(exec, location, it, "div");
             ++it;
             break;
         }
         case op_mod: {
-            printBinaryOp(location, it, "mod");
+            printBinaryOp(exec, location, it, "mod");
             break;
         }
         case op_sub: {
-            printBinaryOp(location, it, "sub");
+            printBinaryOp(exec, location, it, "sub");
             ++it;
             break;
         }
         case op_lshift: {
-            printBinaryOp(location, it, "lshift");
+            printBinaryOp(exec, location, it, "lshift");
             break;            
         }
         case op_rshift: {
-            printBinaryOp(location, it, "rshift");
+            printBinaryOp(exec, location, it, "rshift");
             break;
         }
         case op_urshift: {
-            printBinaryOp(location, it, "urshift");
+            printBinaryOp(exec, location, it, "urshift");
             break;
         }
         case op_bitand: {
-            printBinaryOp(location, it, "bitand");
+            printBinaryOp(exec, location, it, "bitand");
             ++it;
             break;
         }
         case op_bitxor: {
-            printBinaryOp(location, it, "bitxor");
+            printBinaryOp(exec, location, it, "bitxor");
             ++it;
             break;
         }
         case op_bitor: {
-            printBinaryOp(location, it, "bitor");
+            printBinaryOp(exec, location, it, "bitor");
             ++it;
             break;
         }
         case op_bitnot: {
-            printUnaryOp(location, it, "bitnot");
+            printUnaryOp(exec, location, it, "bitnot");
             break;
         }
         case op_instanceof: {
@@ -648,59 +644,59 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
             int r1 = (++it)->u.operand;
             int r2 = (++it)->u.operand;
             int r3 = (++it)->u.operand;
-            printf("[%4d] instanceof\t\t %s, %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str(), registerName(r3).c_str());
+            printf("[%4d] instanceof\t\t %s, %s, %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), registerName(exec, r2).c_str(), registerName(exec, r3).c_str());
             break;
         }
         case op_typeof: {
-            printUnaryOp(location, it, "typeof");
+            printUnaryOp(exec, location, it, "typeof");
             break;
         }
         case op_is_undefined: {
-            printUnaryOp(location, it, "is_undefined");
+            printUnaryOp(exec, location, it, "is_undefined");
             break;
         }
         case op_is_boolean: {
-            printUnaryOp(location, it, "is_boolean");
+            printUnaryOp(exec, location, it, "is_boolean");
             break;
         }
         case op_is_number: {
-            printUnaryOp(location, it, "is_number");
+            printUnaryOp(exec, location, it, "is_number");
             break;
         }
         case op_is_string: {
-            printUnaryOp(location, it, "is_string");
+            printUnaryOp(exec, location, it, "is_string");
             break;
         }
         case op_is_object: {
-            printUnaryOp(location, it, "is_object");
+            printUnaryOp(exec, location, it, "is_object");
             break;
         }
         case op_is_function: {
-            printUnaryOp(location, it, "is_function");
+            printUnaryOp(exec, location, it, "is_function");
             break;
         }
         case op_in: {
-            printBinaryOp(location, it, "in");
+            printBinaryOp(exec, location, it, "in");
             break;
         }
         case op_resolve: {
             int r0 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
-            printf("[%4d] resolve\t\t %s, %s\n", location, registerName(r0).c_str(), idName(id0, m_identifiers[id0]).c_str());
+            printf("[%4d] resolve\t\t %s, %s\n", location, registerName(exec, r0).c_str(), idName(id0, m_identifiers[id0]).c_str());
             break;
         }
         case op_resolve_skip: {
             int r0 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
             int skipLevels = (++it)->u.operand;
-            printf("[%4d] resolve_skip\t %s, %s, %d\n", location, registerName(r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), skipLevels);
+            printf("[%4d] resolve_skip\t %s, %s, %d\n", location, registerName(exec, r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), skipLevels);
             break;
         }
         case op_resolve_global: {
             int r0 = (++it)->u.operand;
             JSValue scope = JSValue((++it)->u.jsCell);
             int id0 = (++it)->u.operand;
-            printf("[%4d] resolve_global\t %s, %s, %s\n", location, registerName(r0).c_str(), valueToSourceString(exec, scope).ascii(), idName(id0, m_identifiers[id0]).c_str());
+            printf("[%4d] resolve_global\t %s, %s, %s\n", location, registerName(exec, r0).c_str(), valueToSourceString(exec, scope).ascii(), idName(id0, m_identifiers[id0]).c_str());
             it += 2;
             break;
         }
@@ -708,244 +704,265 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
             int r0 = (++it)->u.operand;
             int index = (++it)->u.operand;
             int skipLevels = (++it)->u.operand;
-            printf("[%4d] get_scoped_var\t %s, %d, %d\n", location, registerName(r0).c_str(), index, skipLevels);
+            printf("[%4d] get_scoped_var\t %s, %d, %d\n", location, registerName(exec, r0).c_str(), index, skipLevels);
             break;
         }
         case op_put_scoped_var: {
             int index = (++it)->u.operand;
             int skipLevels = (++it)->u.operand;
             int r0 = (++it)->u.operand;
-            printf("[%4d] put_scoped_var\t %d, %d, %s\n", location, index, skipLevels, registerName(r0).c_str());
+            printf("[%4d] put_scoped_var\t %d, %d, %s\n", location, index, skipLevels, registerName(exec, r0).c_str());
             break;
         }
         case op_get_global_var: {
             int r0 = (++it)->u.operand;
             JSValue scope = JSValue((++it)->u.jsCell);
             int index = (++it)->u.operand;
-            printf("[%4d] get_global_var\t %s, %s, %d\n", location, registerName(r0).c_str(), valueToSourceString(exec, scope).ascii(), index);
+            printf("[%4d] get_global_var\t %s, %s, %d\n", location, registerName(exec, r0).c_str(), valueToSourceString(exec, scope).ascii(), index);
             break;
         }
         case op_put_global_var: {
             JSValue scope = JSValue((++it)->u.jsCell);
             int index = (++it)->u.operand;
             int r0 = (++it)->u.operand;
-            printf("[%4d] put_global_var\t %s, %d, %s\n", location, valueToSourceString(exec, scope).ascii(), index, registerName(r0).c_str());
+            printf("[%4d] put_global_var\t %s, %d, %s\n", location, valueToSourceString(exec, scope).ascii(), index, registerName(exec, r0).c_str());
             break;
         }
         case op_resolve_base: {
             int r0 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
-            printf("[%4d] resolve_base\t %s, %s\n", location, registerName(r0).c_str(), idName(id0, m_identifiers[id0]).c_str());
+            printf("[%4d] resolve_base\t %s, %s\n", location, registerName(exec, r0).c_str(), idName(id0, m_identifiers[id0]).c_str());
             break;
         }
         case op_resolve_with_base: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
-            printf("[%4d] resolve_with_base %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), idName(id0, m_identifiers[id0]).c_str());
+            printf("[%4d] resolve_with_base %s, %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), idName(id0, m_identifiers[id0]).c_str());
             break;
         }
         case op_get_by_id: {
-            printGetByIdOp(location, it, m_identifiers, "get_by_id");
+            printGetByIdOp(exec, location, it, "get_by_id");
             break;
         }
         case op_get_by_id_self: {
-            printGetByIdOp(location, it, m_identifiers, "get_by_id_self");
+            printGetByIdOp(exec, location, it, "get_by_id_self");
             break;
         }
         case op_get_by_id_self_list: {
-            printGetByIdOp(location, it, m_identifiers, "get_by_id_self_list");
+            printGetByIdOp(exec, location, it, "get_by_id_self_list");
             break;
         }
         case op_get_by_id_proto: {
-            printGetByIdOp(location, it, m_identifiers, "get_by_id_proto");
+            printGetByIdOp(exec, location, it, "get_by_id_proto");
             break;
         }
         case op_get_by_id_proto_list: {
-            printGetByIdOp(location, it, m_identifiers, "op_get_by_id_proto_list");
+            printGetByIdOp(exec, location, it, "op_get_by_id_proto_list");
             break;
         }
         case op_get_by_id_chain: {
-            printGetByIdOp(location, it, m_identifiers, "get_by_id_chain");
+            printGetByIdOp(exec, location, it, "get_by_id_chain");
             break;
         }
         case op_get_by_id_generic: {
-            printGetByIdOp(location, it, m_identifiers, "get_by_id_generic");
+            printGetByIdOp(exec, location, it, "get_by_id_generic");
             break;
         }
         case op_get_array_length: {
-            printGetByIdOp(location, it, m_identifiers, "get_array_length");
+            printGetByIdOp(exec, location, it, "get_array_length");
             break;
         }
         case op_get_string_length: {
-            printGetByIdOp(location, it, m_identifiers, "get_string_length");
+            printGetByIdOp(exec, location, it, "get_string_length");
             break;
         }
         case op_put_by_id: {
-            printPutByIdOp(location, it, m_identifiers, "put_by_id");
+            printPutByIdOp(exec, location, it, "put_by_id");
             break;
         }
         case op_put_by_id_replace: {
-            printPutByIdOp(location, it, m_identifiers, "put_by_id_replace");
+            printPutByIdOp(exec, location, it, "put_by_id_replace");
             break;
         }
         case op_put_by_id_transition: {
-            printPutByIdOp(location, it, m_identifiers, "put_by_id_transition");
+            printPutByIdOp(exec, location, it, "put_by_id_transition");
             break;
         }
         case op_put_by_id_generic: {
-            printPutByIdOp(location, it, m_identifiers, "put_by_id_generic");
+            printPutByIdOp(exec, location, it, "put_by_id_generic");
             break;
         }
         case op_put_getter: {
             int r0 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
-            printf("[%4d] put_getter\t %s, %s, %s\n", location, registerName(r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(r1).c_str());
+            printf("[%4d] put_getter\t %s, %s, %s\n", location, registerName(exec, r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(exec, r1).c_str());
             break;
         }
         case op_put_setter: {
             int r0 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
-            printf("[%4d] put_setter\t %s, %s, %s\n", location, registerName(r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(r1).c_str());
+            printf("[%4d] put_setter\t %s, %s, %s\n", location, registerName(exec, r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(exec, r1).c_str());
             break;
         }
         case op_method_check: {
-            printf("[%4d] op_method_check\n", location);
+            printf("[%4d] method_check\n", location);
             break;
         }
         case op_del_by_id: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
-            printf("[%4d] del_by_id\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), idName(id0, m_identifiers[id0]).c_str());
+            printf("[%4d] del_by_id\t %s, %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), idName(id0, m_identifiers[id0]).c_str());
             break;
         }
         case op_get_by_val: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int r2 = (++it)->u.operand;
-            printf("[%4d] get_by_val\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
+            printf("[%4d] get_by_val\t %s, %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), registerName(exec, r2).c_str());
+            break;
+        }
+        case op_get_by_pname: {
+            int r0 = (++it)->u.operand;
+            int r1 = (++it)->u.operand;
+            int r2 = (++it)->u.operand;
+            int r3 = (++it)->u.operand;
+            int r4 = (++it)->u.operand;
+            int r5 = (++it)->u.operand;
+            printf("[%4d] get_by_pname\t %s, %s, %s, %s, %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), registerName(exec, r2).c_str(), registerName(exec, r3).c_str(), registerName(exec, r4).c_str(), registerName(exec, r5).c_str());
             break;
         }
         case op_put_by_val: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int r2 = (++it)->u.operand;
-            printf("[%4d] put_by_val\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
+            printf("[%4d] put_by_val\t %s, %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), registerName(exec, r2).c_str());
             break;
         }
         case op_del_by_val: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int r2 = (++it)->u.operand;
-            printf("[%4d] del_by_val\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
+            printf("[%4d] del_by_val\t %s, %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), registerName(exec, r2).c_str());
             break;
         }
         case op_put_by_index: {
             int r0 = (++it)->u.operand;
             unsigned n0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
-            printf("[%4d] put_by_index\t %s, %u, %s\n", location, registerName(r0).c_str(), n0, registerName(r1).c_str());
+            printf("[%4d] put_by_index\t %s, %u, %s\n", location, registerName(exec, r0).c_str(), n0, registerName(exec, r1).c_str());
             break;
         }
         case op_jmp: {
             int offset = (++it)->u.operand;
-            printf("[%4d] jmp\t\t %d(->%d)\n", location, offset, locationForOffset(begin, it, offset));
+            printf("[%4d] jmp\t\t %d(->%d)\n", location, offset, location + offset);
             break;
         }
         case op_loop: {
             int offset = (++it)->u.operand;
-            printf("[%4d] loop\t\t %d(->%d)\n", location, offset, locationForOffset(begin, it, offset));
+            printf("[%4d] loop\t\t %d(->%d)\n", location, offset, location + offset);
             break;
         }
         case op_jtrue: {
-            printConditionalJump(begin, it, location, "jtrue");
+            printConditionalJump(exec, begin, it, location, "jtrue");
             break;
         }
         case op_loop_if_true: {
-            printConditionalJump(begin, it, location, "loop_if_true");
+            printConditionalJump(exec, begin, it, location, "loop_if_true");
+            break;
+        }
+        case op_loop_if_false: {
+            printConditionalJump(exec, begin, it, location, "loop_if_false");
             break;
         }
         case op_jfalse: {
-            printConditionalJump(begin, it, location, "jfalse");
+            printConditionalJump(exec, begin, it, location, "jfalse");
             break;
         }
         case op_jeq_null: {
-            printConditionalJump(begin, it, location, "jeq_null");
+            printConditionalJump(exec, begin, it, location, "jeq_null");
             break;
         }
         case op_jneq_null: {
-            printConditionalJump(begin, it, location, "jneq_null");
+            printConditionalJump(exec, begin, it, location, "jneq_null");
             break;
         }
         case op_jneq_ptr: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int offset = (++it)->u.operand;
-            printf("[%4d] jneq_ptr\t\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, locationForOffset(begin, it, offset));
+            printf("[%4d] jneq_ptr\t\t %s, %s, %d(->%d)\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), offset, location + offset);
             break;
         }
         case op_jnless: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int offset = (++it)->u.operand;
-            printf("[%4d] jnless\t\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, locationForOffset(begin, it, offset));
+            printf("[%4d] jnless\t\t %s, %s, %d(->%d)\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), offset, location + offset);
             break;
         }
         case op_jnlesseq: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int offset = (++it)->u.operand;
-            printf("[%4d] jnlesseq\t\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, locationForOffset(begin, it, offset));
+            printf("[%4d] jnlesseq\t\t %s, %s, %d(->%d)\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), offset, location + offset);
             break;
         }
         case op_loop_if_less: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int offset = (++it)->u.operand;
-            printf("[%4d] loop_if_less\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, locationForOffset(begin, it, offset));
+            printf("[%4d] loop_if_less\t %s, %s, %d(->%d)\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), offset, location + offset);
+            break;
+        }
+        case op_jless: {
+            int r0 = (++it)->u.operand;
+            int r1 = (++it)->u.operand;
+            int offset = (++it)->u.operand;
+            printf("[%4d] jless\t\t %s, %s, %d(->%d)\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), offset, location + offset);
             break;
         }
         case op_loop_if_lesseq: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int offset = (++it)->u.operand;
-            printf("[%4d] loop_if_lesseq\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, locationForOffset(begin, it, offset));
+            printf("[%4d] loop_if_lesseq\t %s, %s, %d(->%d)\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), offset, location + offset);
             break;
         }
         case op_switch_imm: {
             int tableIndex = (++it)->u.operand;
             int defaultTarget = (++it)->u.operand;
             int scrutineeRegister = (++it)->u.operand;
-            printf("[%4d] switch_imm\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, locationForOffset(begin, it, defaultTarget), registerName(scrutineeRegister).c_str());
+            printf("[%4d] switch_imm\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, location + defaultTarget, registerName(exec, scrutineeRegister).c_str());
             break;
         }
         case op_switch_char: {
             int tableIndex = (++it)->u.operand;
             int defaultTarget = (++it)->u.operand;
             int scrutineeRegister = (++it)->u.operand;
-            printf("[%4d] switch_char\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, locationForOffset(begin, it, defaultTarget), registerName(scrutineeRegister).c_str());
+            printf("[%4d] switch_char\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, location + defaultTarget, registerName(exec, scrutineeRegister).c_str());
             break;
         }
         case op_switch_string: {
             int tableIndex = (++it)->u.operand;
             int defaultTarget = (++it)->u.operand;
             int scrutineeRegister = (++it)->u.operand;
-            printf("[%4d] switch_string\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, locationForOffset(begin, it, defaultTarget), registerName(scrutineeRegister).c_str());
+            printf("[%4d] switch_string\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, location + defaultTarget, registerName(exec, scrutineeRegister).c_str());
             break;
         }
         case op_new_func: {
             int r0 = (++it)->u.operand;
             int f0 = (++it)->u.operand;
-            printf("[%4d] new_func\t\t %s, f%d\n", location, registerName(r0).c_str(), f0);
+            printf("[%4d] new_func\t\t %s, f%d\n", location, registerName(exec, r0).c_str(), f0);
             break;
         }
         case op_new_func_exp: {
             int r0 = (++it)->u.operand;
             int f0 = (++it)->u.operand;
-            printf("[%4d] new_func_exp\t %s, f%d\n", location, registerName(r0).c_str(), f0);
+            printf("[%4d] new_func_exp\t %s, f%d\n", location, registerName(exec, r0).c_str(), f0);
             break;
         }
         case op_call: {
@@ -953,7 +970,7 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
             int func = (++it)->u.operand;
             int argCount = (++it)->u.operand;
             int registerOffset = (++it)->u.operand;
-            printf("[%4d] call\t\t %s, %s, %d, %d\n", location, registerName(dst).c_str(), registerName(func).c_str(), argCount, registerOffset);
+            printf("[%4d] call\t\t %s, %s, %d, %d\n", location, registerName(exec, dst).c_str(), registerName(exec, func).c_str(), argCount, registerOffset);
             break;
         }
         case op_call_eval: {
@@ -961,7 +978,7 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
             int func = (++it)->u.operand;
             int argCount = (++it)->u.operand;
             int registerOffset = (++it)->u.operand;
-            printf("[%4d] call_eval\t %s, %s, %d, %d\n", location, registerName(dst).c_str(), registerName(func).c_str(), argCount, registerOffset);
+            printf("[%4d] call_eval\t %s, %s, %d, %d\n", location, registerName(exec, dst).c_str(), registerName(exec, func).c_str(), argCount, registerOffset);
             break;
         }
         case op_call_varargs: {
@@ -969,16 +986,16 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
             int func = (++it)->u.operand;
             int argCount = (++it)->u.operand;
             int registerOffset = (++it)->u.operand;
-            printf("[%4d] call_varargs\t %s, %s, %s, %d\n", location, registerName(dst).c_str(), registerName(func).c_str(), registerName(argCount).c_str(), registerOffset);
+            printf("[%4d] call_varargs\t %s, %s, %s, %d\n", location, registerName(exec, dst).c_str(), registerName(exec, func).c_str(), registerName(exec, argCount).c_str(), registerOffset);
             break;
         }
         case op_load_varargs: {
-            printUnaryOp(location, it, "load_varargs");
+            printUnaryOp(exec, location, it, "load_varargs");
             break;
         }
         case op_tear_off_activation: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] tear_off_activation\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] tear_off_activation\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_tear_off_arguments: {
@@ -987,7 +1004,7 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
         }
         case op_ret: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] ret\t\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] ret\t\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_construct: {
@@ -997,44 +1014,49 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
             int registerOffset = (++it)->u.operand;
             int proto = (++it)->u.operand;
             int thisRegister = (++it)->u.operand;
-            printf("[%4d] construct\t %s, %s, %d, %d, %s, %s\n", location, registerName(dst).c_str(), registerName(func).c_str(), argCount, registerOffset, registerName(proto).c_str(), registerName(thisRegister).c_str());
+            printf("[%4d] construct\t %s, %s, %d, %d, %s, %s\n", location, registerName(exec, dst).c_str(), registerName(exec, func).c_str(), argCount, registerOffset, registerName(exec, proto).c_str(), registerName(exec, thisRegister).c_str());
             break;
         }
         case op_construct_verify: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
-            printf("[%4d] construct_verify\t %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str());
+            printf("[%4d] construct_verify\t %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str());
             break;
         }
         case op_strcat: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
             int count = (++it)->u.operand;
-            printf("[%4d] op_strcat\t %s, %s, %d\n", location, registerName(r0).c_str(), registerName(r1).c_str(), count);
+            printf("[%4d] strcat\t\t %s, %s, %d\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), count);
             break;
         }
         case op_to_primitive: {
             int r0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
-            printf("[%4d] op_to_primitive\t %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str());
+            printf("[%4d] to_primitive\t %s, %s\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str());
             break;
         }
         case op_get_pnames: {
-            int r0 = (++it)->u.operand;
-            int r1 = (++it)->u.operand;
-            printf("[%4d] get_pnames\t %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str());
+            int r0 = it[1].u.operand;
+            int r1 = it[2].u.operand;
+            int r2 = it[3].u.operand;
+            int r3 = it[4].u.operand;
+            int offset = it[5].u.operand;
+            printf("[%4d] get_pnames\t %s, %s, %s, %s, %d(->%d)\n", location, registerName(exec, r0).c_str(), registerName(exec, r1).c_str(), registerName(exec, r2).c_str(), registerName(exec, r3).c_str(), offset, location + offset);
+            it += OPCODE_LENGTH(op_get_pnames) - 1;
             break;
         }
         case op_next_pname: {
-            int dest = (++it)->u.operand;
-            int iter = (++it)->u.operand;
-            int offset = (++it)->u.operand;
-            printf("[%4d] next_pname\t %s, %s, %d(->%d)\n", location, registerName(dest).c_str(), registerName(iter).c_str(), offset, locationForOffset(begin, it, offset));
+            int dest = it[1].u.operand;
+            int iter = it[4].u.operand;
+            int offset = it[5].u.operand;
+            printf("[%4d] next_pname\t %s, %s, %d(->%d)\n", location, registerName(exec, dest).c_str(), registerName(exec, iter).c_str(), offset, location + offset);
+            it += OPCODE_LENGTH(op_next_pname) - 1;
             break;
         }
         case op_push_scope: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] push_scope\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] push_scope\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_pop_scope: {
@@ -1045,64 +1067,63 @@ void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator&
             int r0 = (++it)->u.operand;
             int id0 = (++it)->u.operand;
             int r1 = (++it)->u.operand;
-            printf("[%4d] push_new_scope \t%s, %s, %s\n", location, registerName(r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(r1).c_str());
+            printf("[%4d] push_new_scope \t%s, %s, %s\n", location, registerName(exec, r0).c_str(), idName(id0, m_identifiers[id0]).c_str(), registerName(exec, r1).c_str());
             break;
         }
         case op_jmp_scopes: {
             int scopeDelta = (++it)->u.operand;
             int offset = (++it)->u.operand;
-            printf("[%4d] jmp_scopes\t^%d, %d(->%d)\n", location, scopeDelta, offset, locationForOffset(begin, it, offset));
+            printf("[%4d] jmp_scopes\t^%d, %d(->%d)\n", location, scopeDelta, offset, location + offset);
             break;
         }
         case op_catch: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] catch\t\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] catch\t\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_throw: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] throw\t\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] throw\t\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
         case op_new_error: {
             int r0 = (++it)->u.operand;
             int errorType = (++it)->u.operand;
             int k0 = (++it)->u.operand;
-            printf("[%4d] new_error\t %s, %d, %s\n", location, registerName(r0).c_str(), errorType, constantName(exec, k0, getConstant(k0)).c_str());
+            printf("[%4d] new_error\t %s, %d, %s\n", location, registerName(exec, r0).c_str(), errorType, constantName(exec, k0, getConstant(k0)).c_str());
             break;
         }
         case op_jsr: {
             int retAddrDst = (++it)->u.operand;
             int offset = (++it)->u.operand;
-            printf("[%4d] jsr\t\t %s, %d(->%d)\n", location, registerName(retAddrDst).c_str(), offset, locationForOffset(begin, it, offset));
+            printf("[%4d] jsr\t\t %s, %d(->%d)\n", location, registerName(exec, retAddrDst).c_str(), offset, location + offset);
             break;
         }
         case op_sret: {
             int retAddrSrc = (++it)->u.operand;
-            printf("[%4d] sret\t\t %s\n", location, registerName(retAddrSrc).c_str());
+            printf("[%4d] sret\t\t %s\n", location, registerName(exec, retAddrSrc).c_str());
             break;
         }
         case op_debug: {
             int debugHookID = (++it)->u.operand;
             int firstLine = (++it)->u.operand;
             int lastLine = (++it)->u.operand;
-            int column = (++it)->u.operand;
-            printf("[%4d] debug\t\t %s, %d, %d, %d\n", location, debugHookName(debugHookID), firstLine, lastLine, column);
+            printf("[%4d] debug\t\t %s, %d, %d\n", location, debugHookName(debugHookID), firstLine, lastLine);
             break;
         }
         case op_profile_will_call: {
             int function = (++it)->u.operand;
-            printf("[%4d] profile_will_call %s\n", location, registerName(function).c_str());
+            printf("[%4d] profile_will_call %s\n", location, registerName(exec, function).c_str());
             break;
         }
         case op_profile_did_call: {
             int function = (++it)->u.operand;
-            printf("[%4d] profile_did_call\t %s\n", location, registerName(function).c_str());
+            printf("[%4d] profile_did_call\t %s\n", location, registerName(exec, function).c_str());
             break;
         }
         case op_end: {
             int r0 = (++it)->u.operand;
-            printf("[%4d] end\t\t %s\n", location, registerName(r0).c_str());
+            printf("[%4d] end\t\t %s\n", location, registerName(exec, r0).c_str());
             break;
         }
     }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.h b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.h
index 0163540..eb874cc 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/CodeBlock.h
@@ -438,13 +438,13 @@ namespace JSC {
         size_t numberOfConstantRegisters() const { return m_constantRegisters.size(); }
         void addConstantRegister(const Register& r) { return m_constantRegisters.append(r); }
         Register& constantRegister(int index) { return m_constantRegisters[index - FirstConstantRegisterIndex]; }
-        ALWAYS_INLINE bool isConstantRegisterIndex(int index) { return index >= FirstConstantRegisterIndex; }
+        ALWAYS_INLINE bool isConstantRegisterIndex(int index) const { return index >= FirstConstantRegisterIndex; }
         ALWAYS_INLINE JSValue getConstant(int index) const { return m_constantRegisters[index - FirstConstantRegisterIndex].jsValue(); }
 
-        unsigned addFunctionDecl(PassRefPtr<FunctionExecutable> n) { unsigned size = m_functionDecls.size(); m_functionDecls.append(n); return size; }
+        unsigned addFunctionDecl(NonNullPassRefPtr<FunctionExecutable> n) { unsigned size = m_functionDecls.size(); m_functionDecls.append(n); return size; }
         FunctionExecutable* functionDecl(int index) { return m_functionDecls[index].get(); }
         int numberOfFunctionDecls() { return m_functionDecls.size(); }
-        unsigned addFunctionExpr(PassRefPtr<FunctionExecutable> n) { unsigned size = m_functionExprs.size(); m_functionExprs.append(n); return size; }
+        unsigned addFunctionExpr(NonNullPassRefPtr<FunctionExecutable> n) { unsigned size = m_functionExprs.size(); m_functionExprs.append(n); return size; }
         FunctionExecutable* functionExpr(int index) { return m_functionExprs[index].get(); }
 
         unsigned addRegExp(RegExp* r) { createRareDataIfNecessary(); unsigned size = m_rareData->m_regexps.size(); m_rareData->m_regexps.append(r); return size; }
@@ -482,6 +482,13 @@ namespace JSC {
     private:
 #if !defined(NDEBUG) || ENABLE(OPCODE_SAMPLING)
         void dump(ExecState*, const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator&) const;
+
+        CString registerName(ExecState*, int r) const;
+        void printUnaryOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
+        void printBinaryOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
+        void printConditionalJump(ExecState*, const Vector<Instruction>::const_iterator&, Vector<Instruction>::const_iterator&, int location, const char* op) const;
+        void printGetByIdOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
+        void printPutByIdOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
 #endif
 
         void reparseForExceptionInfoIfNecessary(CallFrame*);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/Opcode.h b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/Opcode.h
index cf50442..d9b2153 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/Opcode.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/Opcode.h
@@ -113,6 +113,7 @@ namespace JSC {
         macro(op_put_by_id_generic, 8) \
         macro(op_del_by_id, 4) \
         macro(op_get_by_val, 4) \
+        macro(op_get_by_pname, 7) \
         macro(op_put_by_val, 4) \
         macro(op_del_by_val, 4) \
         macro(op_put_by_index, 4) \
@@ -127,9 +128,11 @@ namespace JSC {
         macro(op_jneq_ptr, 4) \
         macro(op_jnless, 4) \
         macro(op_jnlesseq, 4) \
+        macro(op_jless, 4) \
         macro(op_jmp_scopes, 3) \
         macro(op_loop, 2) \
         macro(op_loop_if_true, 3) \
+        macro(op_loop_if_false, 3) \
         macro(op_loop_if_less, 4) \
         macro(op_loop_if_lesseq, 4) \
         macro(op_switch_imm, 4) \
@@ -152,8 +155,8 @@ namespace JSC {
         macro(op_strcat, 4) \
         macro(op_to_primitive, 3) \
         \
-        macro(op_get_pnames, 3) \
-        macro(op_next_pname, 4) \
+        macro(op_get_pnames, 6) \
+        macro(op_next_pname, 7) \
         \
         macro(op_push_scope, 2) \
         macro(op_pop_scope, 1) \
@@ -166,7 +169,7 @@ namespace JSC {
         macro(op_jsr, 3) \
         macro(op_sret, 2) \
         \
-        macro(op_debug, 5) \
+        macro(op_debug, 4) \
         macro(op_profile_will_call, 2) \
         macro(op_profile_did_call, 2) \
         \
@@ -193,8 +196,12 @@ namespace JSC {
     #undef VERIFY_OPCODE_ID
 
 #if HAVE(COMPUTED_GOTO)
+#if COMPILER(RVCT)
     typedef void* Opcode;
 #else
+    typedef const void* Opcode;
+#endif
+#else
     typedef OpcodeID Opcode;
 #endif
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.cpp
index 865c919..3f0babc 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.cpp
@@ -33,7 +33,7 @@
 #include "Interpreter.h"
 #include "Opcode.h"
 
-#if !PLATFORM(WIN_OS)
+#if !OS(WINDOWS)
 #include <unistd.h>
 #endif
 
@@ -91,7 +91,7 @@ void SamplingFlags::stop() {}
 uint32_t SamplingFlags::s_flags = 1 << 15;
 
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 
 static void sleepForMicroseconds(unsigned us)
 {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.h b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.h
index 711b086..c3e6247 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecode/SamplingTool.h
@@ -113,7 +113,11 @@ namespace JSC {
         
         void sample(CodeBlock*, Instruction*);
 
+#if COMPILER(WINSCW) || COMPILER(ACC)
         ScriptExecutable* m_executable;
+#else
+        RefPtr<ScriptExecutable> m_executable;
+#endif
         CodeBlock* m_codeBlock;
         int m_sampleCount;
         int m_opcodeSampleCount;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
index 10a1136..b0a0877 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
@@ -534,7 +534,7 @@ PassRefPtr<LabelScope> BytecodeGenerator::newLabelScope(LabelScope::Type type, c
         m_labelScopes.removeLast();
 
     // Allocate new label scope.
-    LabelScope scope(type, name, scopeDepth(), newLabel(), type == LabelScope::Loop ? newLabel() : PassRefPtr<Label>(0)); // Only loops have continue targets.
+    LabelScope scope(type, name, scopeDepth(), newLabel(), type == LabelScope::Loop ? newLabel() : PassRefPtr<Label>()); // Only loops have continue targets.
     m_labelScopes.append(scope);
     return &m_labelScopes.last();
 }
@@ -608,14 +608,15 @@ void ALWAYS_INLINE BytecodeGenerator::rewindUnaryOp()
 
 PassRefPtr<Label> BytecodeGenerator::emitJump(Label* target)
 {
+    size_t begin = instructions().size();
     emitOpcode(target->isForward() ? op_jmp : op_loop);
-    instructions().append(target->offsetFrom(instructions().size()));
+    instructions().append(target->bind(begin, instructions().size()));
     return target;
 }
 
 PassRefPtr<Label> BytecodeGenerator::emitJumpIfTrue(RegisterID* cond, Label* target)
 {
-    if (m_lastOpcodeID == op_less && !target->isForward()) {
+    if (m_lastOpcodeID == op_less) {
         int dstIndex;
         int src1Index;
         int src2Index;
@@ -624,10 +625,12 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfTrue(RegisterID* cond, Label* tar
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindBinaryOp();
-            emitOpcode(op_loop_if_less);
+
+            size_t begin = instructions().size();
+            emitOpcode(target->isForward() ? op_jless : op_loop_if_less);
             instructions().append(src1Index);
             instructions().append(src2Index);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
     } else if (m_lastOpcodeID == op_lesseq && !target->isForward()) {
@@ -639,10 +642,12 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfTrue(RegisterID* cond, Label* tar
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindBinaryOp();
+
+            size_t begin = instructions().size();
             emitOpcode(op_loop_if_lesseq);
             instructions().append(src1Index);
             instructions().append(src2Index);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
     } else if (m_lastOpcodeID == op_eq_null && target->isForward()) {
@@ -653,9 +658,11 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfTrue(RegisterID* cond, Label* tar
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindUnaryOp();
+
+            size_t begin = instructions().size();
             emitOpcode(op_jeq_null);
             instructions().append(srcIndex);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
     } else if (m_lastOpcodeID == op_neq_null && target->isForward()) {
@@ -666,24 +673,26 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfTrue(RegisterID* cond, Label* tar
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindUnaryOp();
+
+            size_t begin = instructions().size();
             emitOpcode(op_jneq_null);
             instructions().append(srcIndex);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
     }
 
+    size_t begin = instructions().size();
+
     emitOpcode(target->isForward() ? op_jtrue : op_loop_if_true);
     instructions().append(cond->index());
-    instructions().append(target->offsetFrom(instructions().size()));
+    instructions().append(target->bind(begin, instructions().size()));
     return target;
 }
 
 PassRefPtr<Label> BytecodeGenerator::emitJumpIfFalse(RegisterID* cond, Label* target)
 {
-    ASSERT(target->isForward());
-
-    if (m_lastOpcodeID == op_less) {
+    if (m_lastOpcodeID == op_less && target->isForward()) {
         int dstIndex;
         int src1Index;
         int src2Index;
@@ -692,13 +701,15 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfFalse(RegisterID* cond, Label* ta
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindBinaryOp();
+
+            size_t begin = instructions().size();
             emitOpcode(op_jnless);
             instructions().append(src1Index);
             instructions().append(src2Index);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
-    } else if (m_lastOpcodeID == op_lesseq) {
+    } else if (m_lastOpcodeID == op_lesseq && target->isForward()) {
         int dstIndex;
         int src1Index;
         int src2Index;
@@ -707,10 +718,12 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfFalse(RegisterID* cond, Label* ta
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindBinaryOp();
+
+            size_t begin = instructions().size();
             emitOpcode(op_jnlesseq);
             instructions().append(src1Index);
             instructions().append(src2Index);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
     } else if (m_lastOpcodeID == op_not) {
@@ -721,12 +734,14 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfFalse(RegisterID* cond, Label* ta
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindUnaryOp();
-            emitOpcode(op_jtrue);
+
+            size_t begin = instructions().size();
+            emitOpcode(target->isForward() ? op_jtrue : op_loop_if_true);
             instructions().append(srcIndex);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
-    } else if (m_lastOpcodeID == op_eq_null) {
+    } else if (m_lastOpcodeID == op_eq_null && target->isForward()) {
         int dstIndex;
         int srcIndex;
 
@@ -734,12 +749,14 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfFalse(RegisterID* cond, Label* ta
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindUnaryOp();
+
+            size_t begin = instructions().size();
             emitOpcode(op_jneq_null);
             instructions().append(srcIndex);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
-    } else if (m_lastOpcodeID == op_neq_null) {
+    } else if (m_lastOpcodeID == op_neq_null && target->isForward()) {
         int dstIndex;
         int srcIndex;
 
@@ -747,34 +764,41 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpIfFalse(RegisterID* cond, Label* ta
 
         if (cond->index() == dstIndex && cond->isTemporary() && !cond->refCount()) {
             rewindUnaryOp();
+
+            size_t begin = instructions().size();
             emitOpcode(op_jeq_null);
             instructions().append(srcIndex);
-            instructions().append(target->offsetFrom(instructions().size()));
+            instructions().append(target->bind(begin, instructions().size()));
             return target;
         }
     }
 
-    emitOpcode(op_jfalse);
+    size_t begin = instructions().size();
+    emitOpcode(target->isForward() ? op_jfalse : op_loop_if_false);
     instructions().append(cond->index());
-    instructions().append(target->offsetFrom(instructions().size()));
+    instructions().append(target->bind(begin, instructions().size()));
     return target;
 }
 
 PassRefPtr<Label> BytecodeGenerator::emitJumpIfNotFunctionCall(RegisterID* cond, Label* target)
 {
+    size_t begin = instructions().size();
+
     emitOpcode(op_jneq_ptr);
     instructions().append(cond->index());
     instructions().append(m_scopeChain->globalObject()->d()->callFunction);
-    instructions().append(target->offsetFrom(instructions().size()));
+    instructions().append(target->bind(begin, instructions().size()));
     return target;
 }
 
 PassRefPtr<Label> BytecodeGenerator::emitJumpIfNotFunctionApply(RegisterID* cond, Label* target)
 {
+    size_t begin = instructions().size();
+
     emitOpcode(op_jneq_ptr);
     instructions().append(cond->index());
     instructions().append(m_scopeChain->globalObject()->d()->applyFunction);
-    instructions().append(target->offsetFrom(instructions().size()));
+    instructions().append(target->bind(begin, instructions().size()));
     return target;
 }
 
@@ -880,7 +904,7 @@ RegisterID* BytecodeGenerator::emitEqualityOp(OpcodeID opcodeID, RegisterID* dst
             && src1->isTemporary()
             && m_codeBlock->isConstantRegisterIndex(src2->index())
             && m_codeBlock->constantRegister(src2->index()).jsValue().isString()) {
-            const UString& value = asString(m_codeBlock->constantRegister(src2->index()).jsValue())->value();
+            const UString& value = asString(m_codeBlock->constantRegister(src2->index()).jsValue())->tryGetValue();
             if (value == "undefined") {
                 rewindUnaryOp();
                 emitOpcode(op_is_undefined);
@@ -1255,6 +1279,19 @@ RegisterID* BytecodeGenerator::emitDeleteById(RegisterID* dst, RegisterID* base,
 
 RegisterID* BytecodeGenerator::emitGetByVal(RegisterID* dst, RegisterID* base, RegisterID* property)
 {
+    for (size_t i = m_forInContextStack.size(); i > 0; i--) {
+        ForInContext& context = m_forInContextStack[i - 1];
+        if (context.propertyRegister == property) {
+            emitOpcode(op_get_by_pname);
+            instructions().append(dst->index());
+            instructions().append(base->index());
+            instructions().append(property->index());
+            instructions().append(context.expectedSubscriptRegister->index());
+            instructions().append(context.iterRegister->index());
+            instructions().append(context.indexRegister->index());
+            return dst;
+        }
+    }
     emitOpcode(op_get_by_val);
     instructions().append(dst->index());
     instructions().append(base->index());
@@ -1598,7 +1635,7 @@ void BytecodeGenerator::emitPopScope()
     m_dynamicScopeDepth--;
 }
 
-void BytecodeGenerator::emitDebugHook(DebugHookID debugHookID, int firstLine, int lastLine, int column)
+void BytecodeGenerator::emitDebugHook(DebugHookID debugHookID, int firstLine, int lastLine)
 {
     if (!m_shouldEmitDebugHooks)
         return;
@@ -1606,7 +1643,6 @@ void BytecodeGenerator::emitDebugHook(DebugHookID debugHookID, int firstLine, in
     instructions().append(debugHookID);
     instructions().append(firstLine);
     instructions().append(lastLine);
-    instructions().append(column);
 }
 
 void BytecodeGenerator::pushFinallyContext(Label* target, RegisterID* retAddrDst)
@@ -1719,6 +1755,8 @@ PassRefPtr<Label> BytecodeGenerator::emitComplexJumpScopes(Label* target, Contro
         }
 
         if (nNormalScopes) {
+            size_t begin = instructions().size();
+
             // We need to remove a number of dynamic scopes to get to the next
             // finally block
             emitOpcode(op_jmp_scopes);
@@ -1727,14 +1765,14 @@ PassRefPtr<Label> BytecodeGenerator::emitComplexJumpScopes(Label* target, Contro
             // If topScope == bottomScope then there isn't actually a finally block
             // left to emit, so make the jmp_scopes jump directly to the target label
             if (topScope == bottomScope) {
-                instructions().append(target->offsetFrom(instructions().size()));
+                instructions().append(target->bind(begin, instructions().size()));
                 return target;
             }
 
             // Otherwise we just use jmp_scopes to pop a group of scopes and go
             // to the next instruction
             RefPtr<Label> nextInsn = newLabel();
-            instructions().append(nextInsn->offsetFrom(instructions().size()));
+            instructions().append(nextInsn->bind(begin, instructions().size()));
             emitLabel(nextInsn.get());
         }
 
@@ -1759,27 +1797,47 @@ PassRefPtr<Label> BytecodeGenerator::emitJumpScopes(Label* target, int targetSco
     if (m_finallyDepth)
         return emitComplexJumpScopes(target, &m_scopeContextStack.last(), &m_scopeContextStack.last() - scopeDelta);
 
+    size_t begin = instructions().size();
+
     emitOpcode(op_jmp_scopes);
     instructions().append(scopeDelta);
-    instructions().append(target->offsetFrom(instructions().size()));
+    instructions().append(target->bind(begin, instructions().size()));
     return target;
 }
 
-RegisterID* BytecodeGenerator::emitNextPropertyName(RegisterID* dst, RegisterID* iter, Label* target)
+RegisterID* BytecodeGenerator::emitGetPropertyNames(RegisterID* dst, RegisterID* base, RegisterID* i, RegisterID* size, Label* breakTarget)
+{
+    size_t begin = instructions().size();
+
+    emitOpcode(op_get_pnames);
+    instructions().append(dst->index());
+    instructions().append(base->index());
+    instructions().append(i->index());
+    instructions().append(size->index());
+    instructions().append(breakTarget->bind(begin, instructions().size()));
+    return dst;
+}
+
+RegisterID* BytecodeGenerator::emitNextPropertyName(RegisterID* dst, RegisterID* base, RegisterID* i, RegisterID* size, RegisterID* iter, Label* target)
 {
+    size_t begin = instructions().size();
+
     emitOpcode(op_next_pname);
     instructions().append(dst->index());
+    instructions().append(base->index());
+    instructions().append(i->index());
+    instructions().append(size->index());
     instructions().append(iter->index());
-    instructions().append(target->offsetFrom(instructions().size()));
+    instructions().append(target->bind(begin, instructions().size()));
     return dst;
 }
 
 RegisterID* BytecodeGenerator::emitCatch(RegisterID* targetRegister, Label* start, Label* end)
 {
 #if ENABLE(JIT)
-    HandlerInfo info = { start->offsetFrom(0), end->offsetFrom(0), instructions().size(), m_dynamicScopeDepth + m_baseScopeDepth, CodeLocationLabel() };
+    HandlerInfo info = { start->bind(0, 0), end->bind(0, 0), instructions().size(), m_dynamicScopeDepth + m_baseScopeDepth, CodeLocationLabel() };
 #else
-    HandlerInfo info = { start->offsetFrom(0), end->offsetFrom(0), instructions().size(), m_dynamicScopeDepth + m_baseScopeDepth };
+    HandlerInfo info = { start->bind(0, 0), end->bind(0, 0), instructions().size(), m_dynamicScopeDepth + m_baseScopeDepth };
 #endif
 
     m_codeBlock->addExceptionHandler(info);
@@ -1799,9 +1857,11 @@ RegisterID* BytecodeGenerator::emitNewError(RegisterID* dst, ErrorType type, JSV
 
 PassRefPtr<Label> BytecodeGenerator::emitJumpSubroutine(RegisterID* retAddrDst, Label* finally)
 {
+    size_t begin = instructions().size();
+
     emitOpcode(op_jsr);
     instructions().append(retAddrDst->index());
-    instructions().append(finally->offsetFrom(instructions().size()));
+    instructions().append(finally->bind(begin, instructions().size()));
     emitLabel(newLabel().get()); // Record the fact that the next instruction is implicitly labeled, because op_sret will return to it.
     return finally;
 }
@@ -1871,7 +1931,7 @@ static void prepareJumpTableForImmediateSwitch(SimpleJumpTable& jumpTable, int32
         // We're emitting this after the clause labels should have been fixed, so 
         // the labels should not be "forward" references
         ASSERT(!labels[i]->isForward());
-        jumpTable.add(keyForImmediateSwitch(nodes[i], min, max), labels[i]->offsetFrom(switchAddress)); 
+        jumpTable.add(keyForImmediateSwitch(nodes[i], min, max), labels[i]->bind(switchAddress, switchAddress + 3)); 
     }
 }
 
@@ -1897,7 +1957,7 @@ static void prepareJumpTableForCharacterSwitch(SimpleJumpTable& jumpTable, int32
         // We're emitting this after the clause labels should have been fixed, so 
         // the labels should not be "forward" references
         ASSERT(!labels[i]->isForward());
-        jumpTable.add(keyForCharacterSwitch(nodes[i], min, max), labels[i]->offsetFrom(switchAddress)); 
+        jumpTable.add(keyForCharacterSwitch(nodes[i], min, max), labels[i]->bind(switchAddress, switchAddress + 3)); 
     }
 }
 
@@ -1911,7 +1971,7 @@ static void prepareJumpTableForStringSwitch(StringJumpTable& jumpTable, int32_t
         ASSERT(nodes[i]->isString());
         UString::Rep* clause = static_cast<StringNode*>(nodes[i])->value().ustring().rep();
         OffsetLocation location;
-        location.branchOffset = labels[i]->offsetFrom(switchAddress);
+        location.branchOffset = labels[i]->bind(switchAddress, switchAddress + 3);
         jumpTable.offsetTable.add(clause, location);
     }
 }
@@ -1922,23 +1982,23 @@ void BytecodeGenerator::endSwitch(uint32_t clauseCount, RefPtr<Label>* labels, E
     m_switchContextStack.removeLast();
     if (switchInfo.switchType == SwitchInfo::SwitchImmediate) {
         instructions()[switchInfo.bytecodeOffset + 1] = m_codeBlock->numberOfImmediateSwitchJumpTables();
-        instructions()[switchInfo.bytecodeOffset + 2] = defaultLabel->offsetFrom(switchInfo.bytecodeOffset + 3);
+        instructions()[switchInfo.bytecodeOffset + 2] = defaultLabel->bind(switchInfo.bytecodeOffset, switchInfo.bytecodeOffset + 3);
 
         SimpleJumpTable& jumpTable = m_codeBlock->addImmediateSwitchJumpTable();
-        prepareJumpTableForImmediateSwitch(jumpTable, switchInfo.bytecodeOffset + 3, clauseCount, labels, nodes, min, max);
+        prepareJumpTableForImmediateSwitch(jumpTable, switchInfo.bytecodeOffset, clauseCount, labels, nodes, min, max);
     } else if (switchInfo.switchType == SwitchInfo::SwitchCharacter) {
         instructions()[switchInfo.bytecodeOffset + 1] = m_codeBlock->numberOfCharacterSwitchJumpTables();
-        instructions()[switchInfo.bytecodeOffset + 2] = defaultLabel->offsetFrom(switchInfo.bytecodeOffset + 3);
+        instructions()[switchInfo.bytecodeOffset + 2] = defaultLabel->bind(switchInfo.bytecodeOffset, switchInfo.bytecodeOffset + 3);
         
         SimpleJumpTable& jumpTable = m_codeBlock->addCharacterSwitchJumpTable();
-        prepareJumpTableForCharacterSwitch(jumpTable, switchInfo.bytecodeOffset + 3, clauseCount, labels, nodes, min, max);
+        prepareJumpTableForCharacterSwitch(jumpTable, switchInfo.bytecodeOffset, clauseCount, labels, nodes, min, max);
     } else {
         ASSERT(switchInfo.switchType == SwitchInfo::SwitchString);
         instructions()[switchInfo.bytecodeOffset + 1] = m_codeBlock->numberOfStringSwitchJumpTables();
-        instructions()[switchInfo.bytecodeOffset + 2] = defaultLabel->offsetFrom(switchInfo.bytecodeOffset + 3);
+        instructions()[switchInfo.bytecodeOffset + 2] = defaultLabel->bind(switchInfo.bytecodeOffset, switchInfo.bytecodeOffset + 3);
 
         StringJumpTable& jumpTable = m_codeBlock->addStringSwitchJumpTable();
-        prepareJumpTableForStringSwitch(jumpTable, switchInfo.bytecodeOffset + 3, clauseCount, labels, nodes);
+        prepareJumpTableForStringSwitch(jumpTable, switchInfo.bytecodeOffset, clauseCount, labels, nodes);
     }
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.h b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.h
index f614f0b..8b6a425 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/BytecodeGenerator.h
@@ -61,6 +61,13 @@ namespace JSC {
         FinallyContext finallyContext;
     };
 
+    struct ForInContext {
+        RefPtr<RegisterID> expectedSubscriptRegister;
+        RefPtr<RegisterID> iterRegister;
+        RefPtr<RegisterID> indexRegister;
+        RefPtr<RegisterID> propertyRegister;
+    };
+
     class BytecodeGenerator : public FastAllocBase {
     public:
         typedef DeclarationStacks::VarStack VarStack;
@@ -185,6 +192,19 @@ namespace JSC {
             return emitNode(0, n);
         }
 
+        void emitNodeInConditionContext(ExpressionNode* n, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue)
+        {
+            if (!m_codeBlock->numberOfLineInfos() || m_codeBlock->lastLineInfo().lineNumber != n->lineNo()) {
+                LineInfo info = { instructions().size(), n->lineNo() };
+                m_codeBlock->addLineInfo(info);
+            }
+            if (m_emitNodeDepth >= s_maxEmitNodeDepth)
+                emitThrowExpressionTooDeepException();
+            ++m_emitNodeDepth;
+            n->emitBytecodeInConditionContext(*this, trueTarget, falseTarget, fallThroughMeansTrue);
+            --m_emitNodeDepth;
+        }
+
         void emitExpressionInfo(unsigned divot, unsigned startOffset, unsigned endOffset)
         { 
             divot -= m_codeBlock->sourceOffset();
@@ -312,8 +332,8 @@ namespace JSC {
         PassRefPtr<Label> emitJumpSubroutine(RegisterID* retAddrDst, Label*);
         void emitSubroutineReturn(RegisterID* retAddrSrc);
 
-        RegisterID* emitGetPropertyNames(RegisterID* dst, RegisterID* base) { return emitUnaryOp(op_get_pnames, dst, base); }
-        RegisterID* emitNextPropertyName(RegisterID* dst, RegisterID* iter, Label* target);
+        RegisterID* emitGetPropertyNames(RegisterID* dst, RegisterID* base, RegisterID* i, RegisterID* size, Label* breakTarget);
+        RegisterID* emitNextPropertyName(RegisterID* dst, RegisterID* base, RegisterID* i, RegisterID* size, RegisterID* iter, Label* target);
 
         RegisterID* emitCatch(RegisterID*, Label* start, Label* end);
         void emitThrow(RegisterID* exc) { emitUnaryNoDstOp(op_throw, exc); }
@@ -323,7 +343,7 @@ namespace JSC {
         RegisterID* emitPushScope(RegisterID* scope);
         void emitPopScope();
 
-        void emitDebugHook(DebugHookID, int firstLine, int lastLine, int column );
+        void emitDebugHook(DebugHookID, int firstLine, int lastLine);
 
         int scopeDepth() { return m_dynamicScopeDepth + m_finallyDepth; }
         bool hasFinaliser() { return m_finallyDepth != 0; }
@@ -331,6 +351,17 @@ namespace JSC {
         void pushFinallyContext(Label* target, RegisterID* returnAddrDst);
         void popFinallyContext();
 
+        void pushOptimisedForIn(RegisterID* expectedBase, RegisterID* iter, RegisterID* index, RegisterID* propertyRegister)
+        {
+            ForInContext context = { expectedBase, iter, index, propertyRegister };
+            m_forInContextStack.append(context);
+        }
+
+        void popOptimisedForIn()
+        {
+            m_forInContextStack.removeLast();
+        }
+
         LabelScope* breakTarget(const Identifier&);
         LabelScope* continueTarget(const Identifier&);
 
@@ -467,6 +498,7 @@ namespace JSC {
 
         Vector<ControlFlowContext> m_scopeContextStack;
         Vector<SwitchInfo> m_switchContextStack;
+        Vector<ForInContext> m_forInContextStack;
 
         int m_nextGlobalIndex;
         int m_nextParameterIndex;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/Label.h b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/Label.h
index 0b3d038..8cab1db 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/Label.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/Label.h
@@ -51,19 +51,17 @@ namespace JSC {
             m_location = location;
 
             unsigned size = m_unresolvedJumps.size();
-            for (unsigned i = 0; i < size; ++i) {
-                unsigned j = m_unresolvedJumps[i];
-                m_codeBlock->instructions()[j].u.operand = m_location - j;
-            }
+            for (unsigned i = 0; i < size; ++i)
+                m_codeBlock->instructions()[m_unresolvedJumps[i].second].u.operand = m_location - m_unresolvedJumps[i].first;
         }
 
-        int offsetFrom(int location) const
+        int bind(int opcode, int offset) const
         {
             if (m_location == invalidLocation) {
-                m_unresolvedJumps.append(location);
+                m_unresolvedJumps.append(std::make_pair(opcode, offset));
                 return 0;
             }
-            return m_location - location;
+            return m_location - opcode;
         }
 
         void ref() { ++m_refCount; }
@@ -77,7 +75,7 @@ namespace JSC {
         bool isForward() const { return m_location == invalidLocation; }
 
     private:
-        typedef Vector<int, 8> JumpVector;
+        typedef Vector<std::pair<int, int>, 8> JumpVector;
 
         static const unsigned invalidLocation = UINT_MAX;
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/NodesCodegen.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/NodesCodegen.cpp
new file mode 100644
index 0000000..64b059d
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/NodesCodegen.cpp
@@ -0,0 +1,2012 @@
+/*
+*  Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
+*  Copyright (C) 2001 Peter Kelly (pmk@post.com)
+*  Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+*  Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
+*  Copyright (C) 2007 Maks Orlovich
+*  Copyright (C) 2007 Eric Seidel <eric@webkit.org>
+*
+*  This library is free software; you can redistribute it and/or
+*  modify it under the terms of the GNU Library General Public
+*  License as published by the Free Software Foundation; either
+*  version 2 of the License, or (at your option) any later version.
+*
+*  This library is distributed in the hope that it will be useful,
+*  but WITHOUT ANY WARRANTY; without even the implied warranty of
+*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+*  Library General Public License for more details.
+*
+*  You should have received a copy of the GNU Library General Public License
+*  along with this library; see the file COPYING.LIB.  If not, write to
+*  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+*  Boston, MA 02110-1301, USA.
+*
+*/
+
+#include "config.h"
+#include "Nodes.h"
+#include "NodeConstructors.h"
+
+#include "BytecodeGenerator.h"
+#include "CallFrame.h"
+#include "Debugger.h"
+#include "JIT.h"
+#include "JSFunction.h"
+#include "JSGlobalObject.h"
+#include "JSStaticScopeObject.h"
+#include "LabelScope.h"
+#include "Lexer.h"
+#include "Operations.h"
+#include "Parser.h"
+#include "PropertyNameArray.h"
+#include "RegExpObject.h"
+#include "SamplingTool.h"
+#include <wtf/Assertions.h>
+#include <wtf/RefCountedLeakCounter.h>
+#include <wtf/Threading.h>
+
+using namespace WTF;
+
+namespace JSC {
+
+/*
+    Details of the emitBytecode function.
+
+    Return value: The register holding the production's value.
+             dst: An optional parameter specifying the most efficient destination at
+                  which to store the production's value. The callee must honor dst.
+
+    The dst argument provides for a crude form of copy propagation. For example,
+
+        x = 1
+
+    becomes
+    
+        load r[x], 1
+    
+    instead of 
+
+        load r0, 1
+        mov r[x], r0
+    
+    because the assignment node, "x =", passes r[x] as dst to the number node, "1".
+*/
+
+// ------------------------------ ThrowableExpressionData --------------------------------
+
+static void substitute(UString& string, const UString& substring)
+{
+    int position = string.find("%s");
+    ASSERT(position != -1);
+    string = makeString(string.substr(0, position), substring, string.substr(position + 2));
+}
+
+RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* message)
+{
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    RegisterID* exception = generator.emitNewError(generator.newTemporary(), type, jsString(generator.globalData(), message));
+    generator.emitThrow(exception);
+    return exception;
+}
+
+RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* messageTemplate, const UString& label)
+{
+    UString message = messageTemplate;
+    substitute(message, label);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    RegisterID* exception = generator.emitNewError(generator.newTemporary(), type, jsString(generator.globalData(), message));
+    generator.emitThrow(exception);
+    return exception;
+}
+
+inline RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* messageTemplate, const Identifier& label)
+{
+    return emitThrowError(generator, type, messageTemplate, label.ustring());
+}
+
+// ------------------------------ NullNode -------------------------------------
+
+RegisterID* NullNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult())
+        return 0;
+    return generator.emitLoad(dst, jsNull());
+}
+
+// ------------------------------ BooleanNode ----------------------------------
+
+RegisterID* BooleanNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult())
+        return 0;
+    return generator.emitLoad(dst, m_value);
+}
+
+// ------------------------------ NumberNode -----------------------------------
+
+RegisterID* NumberNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult())
+        return 0;
+    return generator.emitLoad(dst, m_value);
+}
+
+// ------------------------------ StringNode -----------------------------------
+
+RegisterID* StringNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult())
+        return 0;
+    return generator.emitLoad(dst, m_value);
+}
+
+// ------------------------------ RegExpNode -----------------------------------
+
+RegisterID* RegExpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegExp> regExp = RegExp::create(generator.globalData(), m_pattern.ustring(), m_flags.ustring());
+    if (!regExp->isValid())
+        return emitThrowError(generator, SyntaxError, "Invalid regular expression: %s", regExp->errorMessage());
+    if (dst == generator.ignoredResult())
+        return 0;
+    return generator.emitNewRegExp(generator.finalDestination(dst), regExp.get());
+}
+
+// ------------------------------ ThisNode -------------------------------------
+
+RegisterID* ThisNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult())
+        return 0;
+    return generator.moveToDestinationIfNeeded(dst, generator.thisRegister());
+}
+
+// ------------------------------ ResolveNode ----------------------------------
+
+bool ResolveNode::isPure(BytecodeGenerator& generator) const
+{
+    return generator.isLocal(m_ident);
+}
+
+RegisterID* ResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (RegisterID* local = generator.registerFor(m_ident)) {
+        if (dst == generator.ignoredResult())
+            return 0;
+        return generator.moveToDestinationIfNeeded(dst, local);
+    }
+    
+    generator.emitExpressionInfo(m_startOffset + m_ident.size(), m_ident.size(), 0);
+    return generator.emitResolve(generator.finalDestination(dst), m_ident);
+}
+
+// ------------------------------ ArrayNode ------------------------------------
+
+RegisterID* ArrayNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    // FIXME: Should we put all of this code into emitNewArray?
+
+    unsigned length = 0;
+    ElementNode* firstPutElement;
+    for (firstPutElement = m_element; firstPutElement; firstPutElement = firstPutElement->next()) {
+        if (firstPutElement->elision())
+            break;
+        ++length;
+    }
+
+    if (!firstPutElement && !m_elision)
+        return generator.emitNewArray(generator.finalDestination(dst), m_element);
+
+    RefPtr<RegisterID> array = generator.emitNewArray(generator.tempDestination(dst), m_element);
+
+    for (ElementNode* n = firstPutElement; n; n = n->next()) {
+        RegisterID* value = generator.emitNode(n->value());
+        length += n->elision();
+        generator.emitPutByIndex(array.get(), length++, value);
+    }
+
+    if (m_elision) {
+        RegisterID* value = generator.emitLoad(0, jsNumber(generator.globalData(), m_elision + length));
+        generator.emitPutById(array.get(), generator.propertyNames().length, value);
+    }
+
+    return generator.moveToDestinationIfNeeded(dst, array.get());
+}
+
+bool ArrayNode::isSimpleArray() const
+{
+    if (m_elision || m_optional)
+        return false;
+    for (ElementNode* ptr = m_element; ptr; ptr = ptr->next()) {
+        if (ptr->elision())
+            return false;
+    }
+    return true;
+}
+
+ArgumentListNode* ArrayNode::toArgumentList(JSGlobalData* globalData) const
+{
+    ASSERT(!m_elision && !m_optional);
+    ElementNode* ptr = m_element;
+    if (!ptr)
+        return 0;
+    ArgumentListNode* head = new (globalData) ArgumentListNode(globalData, ptr->value());
+    ArgumentListNode* tail = head;
+    ptr = ptr->next();
+    for (; ptr; ptr = ptr->next()) {
+        ASSERT(!ptr->elision());
+        tail = new (globalData) ArgumentListNode(globalData, tail, ptr->value());
+    }
+    return head;
+}
+
+// ------------------------------ ObjectLiteralNode ----------------------------
+
+RegisterID* ObjectLiteralNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+     if (!m_list) {
+         if (dst == generator.ignoredResult())
+             return 0;
+         return generator.emitNewObject(generator.finalDestination(dst));
+     }
+     return generator.emitNode(dst, m_list);
+}
+
+// ------------------------------ PropertyListNode -----------------------------
+
+RegisterID* PropertyListNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> newObj = generator.tempDestination(dst);
+    
+    generator.emitNewObject(newObj.get());
+    
+    for (PropertyListNode* p = this; p; p = p->m_next) {
+        RegisterID* value = generator.emitNode(p->m_node->m_assign);
+        
+        switch (p->m_node->m_type) {
+            case PropertyNode::Constant: {
+                generator.emitPutById(newObj.get(), p->m_node->name(), value);
+                break;
+            }
+            case PropertyNode::Getter: {
+                generator.emitPutGetter(newObj.get(), p->m_node->name(), value);
+                break;
+            }
+            case PropertyNode::Setter: {
+                generator.emitPutSetter(newObj.get(), p->m_node->name(), value);
+                break;
+            }
+            default:
+                ASSERT_NOT_REACHED();
+        }
+    }
+    
+    return generator.moveToDestinationIfNeeded(dst, newObj.get());
+}
+
+// ------------------------------ BracketAccessorNode --------------------------------
+
+RegisterID* BracketAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments, m_subscript->isPure(generator));
+    RegisterID* property = generator.emitNode(m_subscript);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitGetByVal(generator.finalDestination(dst), base.get(), property);
+}
+
+// ------------------------------ DotAccessorNode --------------------------------
+
+RegisterID* DotAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RegisterID* base = generator.emitNode(m_base);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitGetById(generator.finalDestination(dst), base, m_ident);
+}
+
+// ------------------------------ ArgumentListNode -----------------------------
+
+RegisterID* ArgumentListNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    ASSERT(m_expr);
+    return generator.emitNode(dst, m_expr);
+}
+
+// ------------------------------ NewExprNode ----------------------------------
+
+RegisterID* NewExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> func = generator.emitNode(m_expr);
+    return generator.emitConstruct(generator.finalDestination(dst), func.get(), m_args, divot(), startOffset(), endOffset());
+}
+
+// ------------------------------ EvalFunctionCallNode ----------------------------------
+
+RegisterID* EvalFunctionCallNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> func = generator.tempDestination(dst);
+    RefPtr<RegisterID> thisRegister = generator.newTemporary();
+    generator.emitExpressionInfo(divot() - startOffset() + 4, 4, 0);
+    generator.emitResolveWithBase(thisRegister.get(), func.get(), generator.propertyNames().eval);
+    return generator.emitCallEval(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+}
+
+// ------------------------------ FunctionCallValueNode ----------------------------------
+
+RegisterID* FunctionCallValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> func = generator.emitNode(m_expr);
+    RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
+    return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+}
+
+// ------------------------------ FunctionCallResolveNode ----------------------------------
+
+RegisterID* FunctionCallResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (RefPtr<RegisterID> local = generator.registerFor(m_ident)) {
+        RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
+        return generator.emitCall(generator.finalDestination(dst, thisRegister.get()), local.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+    }
+
+    int index = 0;
+    size_t depth = 0;
+    JSObject* globalObject = 0;
+    if (generator.findScopedProperty(m_ident, index, depth, false, globalObject) && index != missingSymbolMarker()) {
+        RefPtr<RegisterID> func = generator.emitGetScopedVar(generator.newTemporary(), depth, index, globalObject);
+        RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
+        return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+    }
+
+    RefPtr<RegisterID> func = generator.newTemporary();
+    RefPtr<RegisterID> thisRegister = generator.newTemporary();
+    int identifierStart = divot() - startOffset();
+    generator.emitExpressionInfo(identifierStart + m_ident.size(), m_ident.size(), 0);
+    generator.emitResolveWithBase(thisRegister.get(), func.get(), m_ident);
+    return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+}
+
+// ------------------------------ FunctionCallBracketNode ----------------------------------
+
+RegisterID* FunctionCallBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNode(m_base);
+    RegisterID* property = generator.emitNode(m_subscript);
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    RefPtr<RegisterID> function = generator.emitGetByVal(generator.tempDestination(dst), base.get(), property);
+    RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
+    return generator.emitCall(generator.finalDestination(dst, function.get()), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+}
+
+// ------------------------------ FunctionCallDotNode ----------------------------------
+
+RegisterID* FunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> function = generator.tempDestination(dst);
+    RefPtr<RegisterID> thisRegister = generator.newTemporary();
+    generator.emitNode(thisRegister.get(), m_base);
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    generator.emitMethodCheck();
+    generator.emitGetById(function.get(), thisRegister.get(), m_ident);
+    return generator.emitCall(generator.finalDestination(dst, function.get()), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+}
+
+RegisterID* CallFunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<Label> realCall = generator.newLabel();
+    RefPtr<Label> end = generator.newLabel();
+    RefPtr<RegisterID> base = generator.emitNode(m_base);
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    RefPtr<RegisterID> function = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
+    RefPtr<RegisterID> finalDestination = generator.finalDestination(dst, function.get());
+    generator.emitJumpIfNotFunctionCall(function.get(), realCall.get());
+    {
+        RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+        RefPtr<RegisterID> thisRegister = generator.newTemporary();
+        ArgumentListNode* oldList = m_args->m_listNode;
+        if (m_args->m_listNode && m_args->m_listNode->m_expr) {
+            generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
+            m_args->m_listNode = m_args->m_listNode->m_next;
+        } else
+            generator.emitLoad(thisRegister.get(), jsNull());
+
+        generator.emitCall(finalDestination.get(), realFunction.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+        generator.emitJump(end.get());
+        m_args->m_listNode = oldList;
+    }
+    generator.emitLabel(realCall.get());
+    {
+        RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
+        generator.emitCall(finalDestination.get(), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+    }
+    generator.emitLabel(end.get());
+    return finalDestination.get();
+}
+    
+static bool areTrivialApplyArguments(ArgumentsNode* args)
+{
+    return !args->m_listNode || !args->m_listNode->m_expr || !args->m_listNode->m_next
+        || (!args->m_listNode->m_next->m_next && args->m_listNode->m_next->m_expr->isSimpleArray());
+}
+
+RegisterID* ApplyFunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    // A few simple cases can be trivially handled as ordinary function calls.
+    // function.apply(), function.apply(arg) -> identical to function.call
+    // function.apply(thisArg, [arg0, arg1, ...]) -> can be trivially coerced into function.call(thisArg, arg0, arg1, ...) and saves object allocation
+    bool mayBeCall = areTrivialApplyArguments(m_args);
+
+    RefPtr<Label> realCall = generator.newLabel();
+    RefPtr<Label> end = generator.newLabel();
+    RefPtr<RegisterID> base = generator.emitNode(m_base);
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    RefPtr<RegisterID> function = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
+    RefPtr<RegisterID> finalDestination = generator.finalDestination(dst, function.get());
+    generator.emitJumpIfNotFunctionApply(function.get(), realCall.get());
+    {
+        if (mayBeCall) {
+            RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+            RefPtr<RegisterID> thisRegister = generator.newTemporary();
+            ArgumentListNode* oldList = m_args->m_listNode;
+            if (m_args->m_listNode && m_args->m_listNode->m_expr) {
+                generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
+                m_args->m_listNode = m_args->m_listNode->m_next;
+                if (m_args->m_listNode) {
+                    ASSERT(m_args->m_listNode->m_expr->isSimpleArray());
+                    ASSERT(!m_args->m_listNode->m_next);
+                    m_args->m_listNode = static_cast<ArrayNode*>(m_args->m_listNode->m_expr)->toArgumentList(generator.globalData());
+                }
+            } else
+                generator.emitLoad(thisRegister.get(), jsNull());
+            generator.emitCall(finalDestination.get(), realFunction.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+            m_args->m_listNode = oldList;
+        } else {
+            ASSERT(m_args->m_listNode && m_args->m_listNode->m_next);
+            RefPtr<RegisterID> realFunction = generator.emitMove(generator.newTemporary(), base.get());
+            RefPtr<RegisterID> argsCountRegister = generator.newTemporary();
+            RefPtr<RegisterID> thisRegister = generator.newTemporary();
+            RefPtr<RegisterID> argsRegister = generator.newTemporary();
+            generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
+            ArgumentListNode* args = m_args->m_listNode->m_next;
+            bool isArgumentsApply = false;
+            if (args->m_expr->isResolveNode()) {
+                ResolveNode* resolveNode = static_cast<ResolveNode*>(args->m_expr);
+                isArgumentsApply = generator.willResolveToArguments(resolveNode->identifier());
+                if (isArgumentsApply)
+                    generator.emitMove(argsRegister.get(), generator.uncheckedRegisterForArguments());
+            }
+            if (!isArgumentsApply)
+                generator.emitNode(argsRegister.get(), args->m_expr);
+            while ((args = args->m_next))
+                generator.emitNode(args->m_expr);
+
+            generator.emitLoadVarargs(argsCountRegister.get(), argsRegister.get());
+            generator.emitCallVarargs(finalDestination.get(), realFunction.get(), thisRegister.get(), argsCountRegister.get(), divot(), startOffset(), endOffset());
+        }
+        generator.emitJump(end.get());
+    }
+    generator.emitLabel(realCall.get());
+    {
+        RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
+        generator.emitCall(finalDestination.get(), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
+    }
+    generator.emitLabel(end.get());
+    return finalDestination.get();
+}
+
+// ------------------------------ PostfixResolveNode ----------------------------------
+
+static RegisterID* emitPreIncOrDec(BytecodeGenerator& generator, RegisterID* srcDst, Operator oper)
+{
+    return (oper == OpPlusPlus) ? generator.emitPreInc(srcDst) : generator.emitPreDec(srcDst);
+}
+
+static RegisterID* emitPostIncOrDec(BytecodeGenerator& generator, RegisterID* dst, RegisterID* srcDst, Operator oper)
+{
+    if (srcDst == dst)
+        return generator.emitToJSNumber(dst, srcDst);
+    return (oper == OpPlusPlus) ? generator.emitPostInc(dst, srcDst) : generator.emitPostDec(dst, srcDst);
+}
+
+RegisterID* PostfixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (RegisterID* local = generator.registerFor(m_ident)) {
+        if (generator.isLocalConstant(m_ident)) {
+            if (dst == generator.ignoredResult())
+                return 0;
+            return generator.emitToJSNumber(generator.finalDestination(dst), local);
+        }
+
+        if (dst == generator.ignoredResult())
+            return emitPreIncOrDec(generator, local, m_operator);
+        return emitPostIncOrDec(generator, generator.finalDestination(dst), local, m_operator);
+    }
+
+    int index = 0;
+    size_t depth = 0;
+    JSObject* globalObject = 0;
+    if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
+        RefPtr<RegisterID> value = generator.emitGetScopedVar(generator.newTemporary(), depth, index, globalObject);
+        RegisterID* oldValue;
+        if (dst == generator.ignoredResult()) {
+            oldValue = 0;
+            emitPreIncOrDec(generator, value.get(), m_operator);
+        } else {
+            oldValue = emitPostIncOrDec(generator, generator.finalDestination(dst), value.get(), m_operator);
+        }
+        generator.emitPutScopedVar(depth, index, value.get(), globalObject);
+        return oldValue;
+    }
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    RefPtr<RegisterID> value = generator.newTemporary();
+    RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), value.get(), m_ident);
+    RegisterID* oldValue;
+    if (dst == generator.ignoredResult()) {
+        oldValue = 0;
+        emitPreIncOrDec(generator, value.get(), m_operator);
+    } else {
+        oldValue = emitPostIncOrDec(generator, generator.finalDestination(dst), value.get(), m_operator);
+    }
+    generator.emitPutById(base.get(), m_ident, value.get());
+    return oldValue;
+}
+
+// ------------------------------ PostfixBracketNode ----------------------------------
+
+RegisterID* PostfixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNode(m_base);
+    RefPtr<RegisterID> property = generator.emitNode(m_subscript);
+
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    RefPtr<RegisterID> value = generator.emitGetByVal(generator.newTemporary(), base.get(), property.get());
+    RegisterID* oldValue;
+    if (dst == generator.ignoredResult()) {
+        oldValue = 0;
+        if (m_operator == OpPlusPlus)
+            generator.emitPreInc(value.get());
+        else
+            generator.emitPreDec(value.get());
+    } else {
+        oldValue = (m_operator == OpPlusPlus) ? generator.emitPostInc(generator.finalDestination(dst), value.get()) : generator.emitPostDec(generator.finalDestination(dst), value.get());
+    }
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitPutByVal(base.get(), property.get(), value.get());
+    return oldValue;
+}
+
+// ------------------------------ PostfixDotNode ----------------------------------
+
+RegisterID* PostfixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNode(m_base);
+
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    RefPtr<RegisterID> value = generator.emitGetById(generator.newTemporary(), base.get(), m_ident);
+    RegisterID* oldValue;
+    if (dst == generator.ignoredResult()) {
+        oldValue = 0;
+        if (m_operator == OpPlusPlus)
+            generator.emitPreInc(value.get());
+        else
+            generator.emitPreDec(value.get());
+    } else {
+        oldValue = (m_operator == OpPlusPlus) ? generator.emitPostInc(generator.finalDestination(dst), value.get()) : generator.emitPostDec(generator.finalDestination(dst), value.get());
+    }
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitPutById(base.get(), m_ident, value.get());
+    return oldValue;
+}
+
+// ------------------------------ PostfixErrorNode -----------------------------------
+
+RegisterID* PostfixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus
+        ? "Postfix ++ operator applied to value that is not a reference."
+        : "Postfix -- operator applied to value that is not a reference.");
+}
+
+// ------------------------------ DeleteResolveNode -----------------------------------
+
+RegisterID* DeleteResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (generator.registerFor(m_ident))
+        return generator.emitLoad(generator.finalDestination(dst), false);
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    RegisterID* base = generator.emitResolveBase(generator.tempDestination(dst), m_ident);
+    return generator.emitDeleteById(generator.finalDestination(dst, base), base, m_ident);
+}
+
+// ------------------------------ DeleteBracketNode -----------------------------------
+
+RegisterID* DeleteBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> r0 = generator.emitNode(m_base);
+    RegisterID* r1 = generator.emitNode(m_subscript);
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitDeleteByVal(generator.finalDestination(dst), r0.get(), r1);
+}
+
+// ------------------------------ DeleteDotNode -----------------------------------
+
+RegisterID* DeleteDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RegisterID* r0 = generator.emitNode(m_base);
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitDeleteById(generator.finalDestination(dst), r0, m_ident);
+}
+
+// ------------------------------ DeleteValueNode -----------------------------------
+
+RegisterID* DeleteValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitNode(generator.ignoredResult(), m_expr);
+
+    // delete on a non-location expression ignores the value and returns true
+    return generator.emitLoad(generator.finalDestination(dst), true);
+}
+
+// ------------------------------ VoidNode -------------------------------------
+
+RegisterID* VoidNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult()) {
+        generator.emitNode(generator.ignoredResult(), m_expr);
+        return 0;
+    }
+    RefPtr<RegisterID> r0 = generator.emitNode(m_expr);
+    return generator.emitLoad(dst, jsUndefined());
+}
+
+// ------------------------------ TypeOfValueNode -----------------------------------
+
+RegisterID* TypeOfResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (RegisterID* local = generator.registerFor(m_ident)) {
+        if (dst == generator.ignoredResult())
+            return 0;
+        return generator.emitTypeOf(generator.finalDestination(dst), local);
+    }
+
+    RefPtr<RegisterID> scratch = generator.emitResolveBase(generator.tempDestination(dst), m_ident);
+    generator.emitGetById(scratch.get(), scratch.get(), m_ident);
+    if (dst == generator.ignoredResult())
+        return 0;
+    return generator.emitTypeOf(generator.finalDestination(dst, scratch.get()), scratch.get());
+}
+
+// ------------------------------ TypeOfValueNode -----------------------------------
+
+RegisterID* TypeOfValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult()) {
+        generator.emitNode(generator.ignoredResult(), m_expr);
+        return 0;
+    }
+    RefPtr<RegisterID> src = generator.emitNode(m_expr);
+    return generator.emitTypeOf(generator.finalDestination(dst), src.get());
+}
+
+// ------------------------------ PrefixResolveNode ----------------------------------
+
+RegisterID* PrefixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (RegisterID* local = generator.registerFor(m_ident)) {
+        if (generator.isLocalConstant(m_ident)) {
+            if (dst == generator.ignoredResult())
+                return 0;
+            RefPtr<RegisterID> r0 = generator.emitLoad(generator.finalDestination(dst), (m_operator == OpPlusPlus) ? 1.0 : -1.0);
+            return generator.emitBinaryOp(op_add, r0.get(), local, r0.get(), OperandTypes());
+        }
+
+        emitPreIncOrDec(generator, local, m_operator);
+        return generator.moveToDestinationIfNeeded(dst, local);
+    }
+
+    int index = 0;
+    size_t depth = 0;
+    JSObject* globalObject = 0;
+    if (generator.findScopedProperty(m_ident, index, depth, false, globalObject) && index != missingSymbolMarker()) {
+        RefPtr<RegisterID> propDst = generator.emitGetScopedVar(generator.tempDestination(dst), depth, index, globalObject);
+        emitPreIncOrDec(generator, propDst.get(), m_operator);
+        generator.emitPutScopedVar(depth, index, propDst.get(), globalObject);
+        return generator.moveToDestinationIfNeeded(dst, propDst.get());
+    }
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    RefPtr<RegisterID> propDst = generator.tempDestination(dst);
+    RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), propDst.get(), m_ident);
+    emitPreIncOrDec(generator, propDst.get(), m_operator);
+    generator.emitPutById(base.get(), m_ident, propDst.get());
+    return generator.moveToDestinationIfNeeded(dst, propDst.get());
+}
+
+// ------------------------------ PrefixBracketNode ----------------------------------
+
+RegisterID* PrefixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNode(m_base);
+    RefPtr<RegisterID> property = generator.emitNode(m_subscript);
+    RefPtr<RegisterID> propDst = generator.tempDestination(dst);
+
+    generator.emitExpressionInfo(divot() + m_subexpressionDivotOffset, m_subexpressionStartOffset, endOffset() - m_subexpressionDivotOffset);
+    RegisterID* value = generator.emitGetByVal(propDst.get(), base.get(), property.get());
+    if (m_operator == OpPlusPlus)
+        generator.emitPreInc(value);
+    else
+        generator.emitPreDec(value);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitPutByVal(base.get(), property.get(), value);
+    return generator.moveToDestinationIfNeeded(dst, propDst.get());
+}
+
+// ------------------------------ PrefixDotNode ----------------------------------
+
+RegisterID* PrefixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNode(m_base);
+    RefPtr<RegisterID> propDst = generator.tempDestination(dst);
+
+    generator.emitExpressionInfo(divot() + m_subexpressionDivotOffset, m_subexpressionStartOffset, endOffset() - m_subexpressionDivotOffset);
+    RegisterID* value = generator.emitGetById(propDst.get(), base.get(), m_ident);
+    if (m_operator == OpPlusPlus)
+        generator.emitPreInc(value);
+    else
+        generator.emitPreDec(value);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitPutById(base.get(), m_ident, value);
+    return generator.moveToDestinationIfNeeded(dst, propDst.get());
+}
+
+// ------------------------------ PrefixErrorNode -----------------------------------
+
+RegisterID* PrefixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus
+        ? "Prefix ++ operator applied to value that is not a reference."
+        : "Prefix -- operator applied to value that is not a reference.");
+}
+
+// ------------------------------ Unary Operation Nodes -----------------------------------
+
+RegisterID* UnaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RegisterID* src = generator.emitNode(m_expr);
+    return generator.emitUnaryOp(opcodeID(), generator.finalDestination(dst), src);
+}
+
+
+// ------------------------------ LogicalNotNode -----------------------------------
+
+void LogicalNotNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue)
+{
+    ASSERT(expr()->hasConditionContextCodegen());
+
+    // reverse the true and false targets
+    generator.emitNodeInConditionContext(expr(), falseTarget, trueTarget, !fallThroughMeansTrue);
+}
+
+
+// ------------------------------ Binary Operation Nodes -----------------------------------
+
+// BinaryOpNode::emitStrcat:
+//
+// This node generates an op_strcat operation.  This opcode can handle concatenation of three or
+// more values, where we can determine a set of separate op_add operations would be operating on
+// string values.
+//
+// This function expects to be operating on a graph of AST nodes looking something like this:
+//
+//     (a)...     (b)
+//          \   /
+//           (+)     (c)
+//              \   /
+//      [d]     ((+))
+//         \    /
+//          [+=]
+//
+// The assignment operation is optional, if it exists the register holding the value on the
+// lefthand side of the assignment should be passing as the optional 'lhs' argument.
+//
+// The method should be called on the node at the root of the tree of regular binary add
+// operations (marked in the diagram with a double set of parentheses).  This node must
+// be performing a string concatenation (determined by statically detecting that at least
+// one child must be a string).  
+//
+// Since the minimum number of values being concatenated together is expected to be 3, if
+// a lhs to a concatenating assignment is not provided then the  root add should have at
+// least one left child that is also an add that can be determined to be operating on strings.
+//
+RegisterID* BinaryOpNode::emitStrcat(BytecodeGenerator& generator, RegisterID* dst, RegisterID* lhs, ReadModifyResolveNode* emitExpressionInfoForMe)
+{
+    ASSERT(isAdd());
+    ASSERT(resultDescriptor().definitelyIsString());
+
+    // Create a list of expressions for all the adds in the tree of nodes we can convert into
+    // a string concatenation.  The rightmost node (c) is added first.  The rightmost node is
+    // added first, and the leftmost child is never added, so the vector produced for the
+    // example above will be [ c, b ].
+    Vector<ExpressionNode*, 16> reverseExpressionList;
+    reverseExpressionList.append(m_expr2);
+
+    // Examine the left child of the add.  So long as this is a string add, add its right-child
+    // to the list, and keep processing along the left fork.
+    ExpressionNode* leftMostAddChild = m_expr1;
+    while (leftMostAddChild->isAdd() && leftMostAddChild->resultDescriptor().definitelyIsString()) {
+        reverseExpressionList.append(static_cast<AddNode*>(leftMostAddChild)->m_expr2);
+        leftMostAddChild = static_cast<AddNode*>(leftMostAddChild)->m_expr1;
+    }
+
+    Vector<RefPtr<RegisterID>, 16> temporaryRegisters;
+
+    // If there is an assignment, allocate a temporary to hold the lhs after conversion.
+    // We could possibly avoid this (the lhs is converted last anyway, we could let the
+    // op_strcat node handle its conversion if required).
+    if (lhs)
+        temporaryRegisters.append(generator.newTemporary());
+
+    // Emit code for the leftmost node ((a) in the example).
+    temporaryRegisters.append(generator.newTemporary());
+    RegisterID* leftMostAddChildTempRegister = temporaryRegisters.last().get();
+    generator.emitNode(leftMostAddChildTempRegister, leftMostAddChild);
+
+    // Note on ordering of conversions:
+    //
+    // We maintain the same ordering of conversions as we would see if the concatenations
+    // was performed as a sequence of adds (otherwise this optimization could change
+    // behaviour should an object have been provided a valueOf or toString method).
+    //
+    // Considering the above example, the sequnce of execution is:
+    //     * evaluate operand (a)
+    //     * evaluate operand (b)
+    //     * convert (a) to primitive   <-  (this would be triggered by the first add)
+    //     * convert (b) to primitive   <-  (ditto)
+    //     * evaluate operand (c)
+    //     * convert (c) to primitive   <-  (this would be triggered by the second add)
+    // And optionally, if there is an assignment:
+    //     * convert (d) to primitive   <-  (this would be triggered by the assigning addition)
+    //
+    // As such we do not plant an op to convert the leftmost child now.  Instead, use
+    // 'leftMostAddChildTempRegister' as a flag to trigger generation of the conversion
+    // once the second node has been generated.  However, if the leftmost child is an
+    // immediate we can trivially determine that no conversion will be required.
+    // If this is the case
+    if (leftMostAddChild->isString())
+        leftMostAddChildTempRegister = 0;
+
+    while (reverseExpressionList.size()) {
+        ExpressionNode* node = reverseExpressionList.last();
+        reverseExpressionList.removeLast();
+
+        // Emit the code for the current node.
+        temporaryRegisters.append(generator.newTemporary());
+        generator.emitNode(temporaryRegisters.last().get(), node);
+
+        // On the first iteration of this loop, when we first reach this point we have just
+        // generated the second node, which means it is time to convert the leftmost operand.
+        if (leftMostAddChildTempRegister) {
+            generator.emitToPrimitive(leftMostAddChildTempRegister, leftMostAddChildTempRegister);
+            leftMostAddChildTempRegister = 0; // Only do this once.
+        }
+        // Plant a conversion for this node, if necessary.
+        if (!node->isString())
+            generator.emitToPrimitive(temporaryRegisters.last().get(), temporaryRegisters.last().get());
+    }
+    ASSERT(temporaryRegisters.size() >= 3);
+
+    // Certain read-modify nodes require expression info to be emitted *after* m_right has been generated.
+    // If this is required the node is passed as 'emitExpressionInfoForMe'; do so now.
+    if (emitExpressionInfoForMe)
+        generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->startOffset(), emitExpressionInfoForMe->endOffset());
+
+    // If there is an assignment convert the lhs now.  This will also copy lhs to
+    // the temporary register we allocated for it.
+    if (lhs)
+        generator.emitToPrimitive(temporaryRegisters[0].get(), lhs);
+
+    return generator.emitStrcat(generator.finalDestination(dst, temporaryRegisters[0].get()), temporaryRegisters[0].get(), temporaryRegisters.size());
+}
+
+RegisterID* BinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    OpcodeID opcodeID = this->opcodeID();
+
+    if (opcodeID == op_add && m_expr1->isAdd() && m_expr1->resultDescriptor().definitelyIsString())
+        return emitStrcat(generator, dst);
+
+    if (opcodeID == op_neq) {
+        if (m_expr1->isNull() || m_expr2->isNull()) {
+            RefPtr<RegisterID> src = generator.tempDestination(dst);
+            generator.emitNode(src.get(), m_expr1->isNull() ? m_expr2 : m_expr1);
+            return generator.emitUnaryOp(op_neq_null, generator.finalDestination(dst, src.get()), src.get());
+        }
+    }
+
+    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
+    RegisterID* src2 = generator.emitNode(m_expr2);
+    return generator.emitBinaryOp(opcodeID, generator.finalDestination(dst, src1.get()), src1.get(), src2, OperandTypes(m_expr1->resultDescriptor(), m_expr2->resultDescriptor()));
+}
+
+RegisterID* EqualNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (m_expr1->isNull() || m_expr2->isNull()) {
+        RefPtr<RegisterID> src = generator.tempDestination(dst);
+        generator.emitNode(src.get(), m_expr1->isNull() ? m_expr2 : m_expr1);
+        return generator.emitUnaryOp(op_eq_null, generator.finalDestination(dst, src.get()), src.get());
+    }
+
+    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
+    RegisterID* src2 = generator.emitNode(m_expr2);
+    return generator.emitEqualityOp(op_eq, generator.finalDestination(dst, src1.get()), src1.get(), src2);
+}
+
+RegisterID* StrictEqualNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
+    RegisterID* src2 = generator.emitNode(m_expr2);
+    return generator.emitEqualityOp(op_stricteq, generator.finalDestination(dst, src1.get()), src1.get(), src2);
+}
+
+RegisterID* ReverseBinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
+    RegisterID* src2 = generator.emitNode(m_expr2);
+    return generator.emitBinaryOp(opcodeID(), generator.finalDestination(dst, src1.get()), src2, src1.get(), OperandTypes(m_expr2->resultDescriptor(), m_expr1->resultDescriptor()));
+}
+
+RegisterID* ThrowableBinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
+    RegisterID* src2 = generator.emitNode(m_expr2);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitBinaryOp(opcodeID(), generator.finalDestination(dst, src1.get()), src1.get(), src2, OperandTypes(m_expr1->resultDescriptor(), m_expr2->resultDescriptor()));
+}
+
+RegisterID* InstanceOfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
+    RefPtr<RegisterID> src2 = generator.emitNode(m_expr2);
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitGetByIdExceptionInfo(op_instanceof);
+    RegisterID* src2Prototype = generator.emitGetById(generator.newTemporary(), src2.get(), generator.globalData()->propertyNames->prototype);
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitInstanceOf(generator.finalDestination(dst, src1.get()), src1.get(), src2.get(), src2Prototype);
+}
+
+// ------------------------------ LogicalOpNode ----------------------------
+
+RegisterID* LogicalOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> temp = generator.tempDestination(dst);
+    RefPtr<Label> target = generator.newLabel();
+    
+    generator.emitNode(temp.get(), m_expr1);
+    if (m_operator == OpLogicalAnd)
+        generator.emitJumpIfFalse(temp.get(), target.get());
+    else
+        generator.emitJumpIfTrue(temp.get(), target.get());
+    generator.emitNode(temp.get(), m_expr2);
+    generator.emitLabel(target.get());
+
+    return generator.moveToDestinationIfNeeded(dst, temp.get());
+}
+
+void LogicalOpNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue)
+{
+    if (m_expr1->hasConditionContextCodegen()) {
+        RefPtr<Label> afterExpr1 = generator.newLabel();
+        if (m_operator == OpLogicalAnd)
+            generator.emitNodeInConditionContext(m_expr1, afterExpr1.get(), falseTarget, true);
+        else 
+            generator.emitNodeInConditionContext(m_expr1, trueTarget, afterExpr1.get(), false);
+        generator.emitLabel(afterExpr1.get());
+    } else {
+        RegisterID* temp = generator.emitNode(m_expr1);
+        if (m_operator == OpLogicalAnd)
+            generator.emitJumpIfFalse(temp, falseTarget);
+        else
+            generator.emitJumpIfTrue(temp, trueTarget);
+    }
+
+    if (m_expr2->hasConditionContextCodegen())
+        generator.emitNodeInConditionContext(m_expr2, trueTarget, falseTarget, fallThroughMeansTrue);
+    else {
+        RegisterID* temp = generator.emitNode(m_expr2);
+        if (fallThroughMeansTrue)
+            generator.emitJumpIfFalse(temp, falseTarget);
+        else
+            generator.emitJumpIfTrue(temp, trueTarget);
+    }
+}
+
+// ------------------------------ ConditionalNode ------------------------------
+
+RegisterID* ConditionalNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> newDst = generator.finalDestination(dst);
+    RefPtr<Label> beforeElse = generator.newLabel();
+    RefPtr<Label> afterElse = generator.newLabel();
+
+    if (m_logical->hasConditionContextCodegen()) {
+        RefPtr<Label> beforeThen = generator.newLabel();
+        generator.emitNodeInConditionContext(m_logical, beforeThen.get(), beforeElse.get(), true);
+        generator.emitLabel(beforeThen.get());
+    } else {
+        RegisterID* cond = generator.emitNode(m_logical);
+        generator.emitJumpIfFalse(cond, beforeElse.get());
+    }
+
+    generator.emitNode(newDst.get(), m_expr1);
+    generator.emitJump(afterElse.get());
+
+    generator.emitLabel(beforeElse.get());
+    generator.emitNode(newDst.get(), m_expr2);
+
+    generator.emitLabel(afterElse.get());
+
+    return newDst.get();
+}
+
+// ------------------------------ ReadModifyResolveNode -----------------------------------
+
+// FIXME: should this be moved to be a method on BytecodeGenerator?
+static ALWAYS_INLINE RegisterID* emitReadModifyAssignment(BytecodeGenerator& generator, RegisterID* dst, RegisterID* src1, ExpressionNode* m_right, Operator oper, OperandTypes types, ReadModifyResolveNode* emitExpressionInfoForMe = 0)
+{
+    OpcodeID opcodeID;
+    switch (oper) {
+        case OpMultEq:
+            opcodeID = op_mul;
+            break;
+        case OpDivEq:
+            opcodeID = op_div;
+            break;
+        case OpPlusEq:
+            if (m_right->isAdd() && m_right->resultDescriptor().definitelyIsString())
+                return static_cast<AddNode*>(m_right)->emitStrcat(generator, dst, src1, emitExpressionInfoForMe);
+            opcodeID = op_add;
+            break;
+        case OpMinusEq:
+            opcodeID = op_sub;
+            break;
+        case OpLShift:
+            opcodeID = op_lshift;
+            break;
+        case OpRShift:
+            opcodeID = op_rshift;
+            break;
+        case OpURShift:
+            opcodeID = op_urshift;
+            break;
+        case OpAndEq:
+            opcodeID = op_bitand;
+            break;
+        case OpXOrEq:
+            opcodeID = op_bitxor;
+            break;
+        case OpOrEq:
+            opcodeID = op_bitor;
+            break;
+        case OpModEq:
+            opcodeID = op_mod;
+            break;
+        default:
+            ASSERT_NOT_REACHED();
+            return dst;
+    }
+
+    RegisterID* src2 = generator.emitNode(m_right);
+
+    // Certain read-modify nodes require expression info to be emitted *after* m_right has been generated.
+    // If this is required the node is passed as 'emitExpressionInfoForMe'; do so now.
+    if (emitExpressionInfoForMe)
+        generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->startOffset(), emitExpressionInfoForMe->endOffset());
+
+    return generator.emitBinaryOp(opcodeID, dst, src1, src2, types);
+}
+
+RegisterID* ReadModifyResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (RegisterID* local = generator.registerFor(m_ident)) {
+        if (generator.isLocalConstant(m_ident)) {
+            return emitReadModifyAssignment(generator, generator.finalDestination(dst), local, m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
+        }
+        
+        if (generator.leftHandSideNeedsCopy(m_rightHasAssignments, m_right->isPure(generator))) {
+            RefPtr<RegisterID> result = generator.newTemporary();
+            generator.emitMove(result.get(), local);
+            emitReadModifyAssignment(generator, result.get(), result.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
+            generator.emitMove(local, result.get());
+            return generator.moveToDestinationIfNeeded(dst, result.get());
+        }
+        
+        RegisterID* result = emitReadModifyAssignment(generator, local, local, m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
+        return generator.moveToDestinationIfNeeded(dst, result);
+    }
+
+    int index = 0;
+    size_t depth = 0;
+    JSObject* globalObject = 0;
+    if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
+        RefPtr<RegisterID> src1 = generator.emitGetScopedVar(generator.tempDestination(dst), depth, index, globalObject);
+        RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
+        generator.emitPutScopedVar(depth, index, result, globalObject);
+        return result;
+    }
+
+    RefPtr<RegisterID> src1 = generator.tempDestination(dst);
+    generator.emitExpressionInfo(divot() - startOffset() + m_ident.size(), m_ident.size(), 0);
+    RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), src1.get(), m_ident);
+    RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()), this);
+    return generator.emitPutById(base.get(), m_ident, result);
+}
+
+// ------------------------------ AssignResolveNode -----------------------------------
+
+RegisterID* AssignResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (RegisterID* local = generator.registerFor(m_ident)) {
+        if (generator.isLocalConstant(m_ident))
+            return generator.emitNode(dst, m_right);
+        
+        RegisterID* result = generator.emitNode(local, m_right);
+        return generator.moveToDestinationIfNeeded(dst, result);
+    }
+
+    int index = 0;
+    size_t depth = 0;
+    JSObject* globalObject = 0;
+    if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
+        if (dst == generator.ignoredResult())
+            dst = 0;
+        RegisterID* value = generator.emitNode(dst, m_right);
+        generator.emitPutScopedVar(depth, index, value, globalObject);
+        return value;
+    }
+
+    RefPtr<RegisterID> base = generator.emitResolveBase(generator.newTemporary(), m_ident);
+    if (dst == generator.ignoredResult())
+        dst = 0;
+    RegisterID* value = generator.emitNode(dst, m_right);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitPutById(base.get(), m_ident, value);
+}
+
+// ------------------------------ AssignDotNode -----------------------------------
+
+RegisterID* AssignDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_rightHasAssignments, m_right->isPure(generator));
+    RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
+    RegisterID* result = generator.emitNode(value.get(), m_right);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitPutById(base.get(), m_ident, result);
+    return generator.moveToDestinationIfNeeded(dst, result);
+}
+
+// ------------------------------ ReadModifyDotNode -----------------------------------
+
+RegisterID* ReadModifyDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_rightHasAssignments, m_right->isPure(generator));
+
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    RefPtr<RegisterID> value = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
+    RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    return generator.emitPutById(base.get(), m_ident, updatedValue);
+}
+
+// ------------------------------ AssignErrorNode -----------------------------------
+
+RegisterID* AssignErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    return emitThrowError(generator, ReferenceError, "Left side of assignment is not a reference.");
+}
+
+// ------------------------------ AssignBracketNode -----------------------------------
+
+RegisterID* AssignBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
+    RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript, m_rightHasAssignments, m_right->isPure(generator));
+    RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
+    RegisterID* result = generator.emitNode(value.get(), m_right);
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitPutByVal(base.get(), property.get(), result);
+    return generator.moveToDestinationIfNeeded(dst, result);
+}
+
+// ------------------------------ ReadModifyBracketNode -----------------------------------
+
+RegisterID* ReadModifyBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
+    RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript, m_rightHasAssignments, m_right->isPure(generator));
+
+    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+    RefPtr<RegisterID> value = generator.emitGetByVal(generator.tempDestination(dst), base.get(), property.get());
+    RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
+
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitPutByVal(base.get(), property.get(), updatedValue);
+
+    return updatedValue;
+}
+
+// ------------------------------ CommaNode ------------------------------------
+
+RegisterID* CommaNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    ASSERT(m_expressions.size() > 1);
+    for (size_t i = 0; i < m_expressions.size() - 1; i++)
+        generator.emitNode(generator.ignoredResult(), m_expressions[i]);
+    return generator.emitNode(dst, m_expressions.last());
+}
+
+// ------------------------------ ConstDeclNode ------------------------------------
+
+RegisterID* ConstDeclNode::emitCodeSingle(BytecodeGenerator& generator)
+{
+    if (RegisterID* local = generator.constRegisterFor(m_ident)) {
+        if (!m_init)
+            return local;
+
+        return generator.emitNode(local, m_init);
+    }
+
+    if (generator.codeType() != EvalCode) {
+        if (m_init)
+            return generator.emitNode(m_init);
+        else
+            return generator.emitResolve(generator.newTemporary(), m_ident);
+    }
+    // FIXME: While this code should only be hit in eval code, it will potentially
+    // assign to the wrong base if m_ident exists in an intervening dynamic scope.
+    RefPtr<RegisterID> base = generator.emitResolveBase(generator.newTemporary(), m_ident);
+    RegisterID* value = m_init ? generator.emitNode(m_init) : generator.emitLoad(0, jsUndefined());
+    return generator.emitPutById(base.get(), m_ident, value);
+}
+
+RegisterID* ConstDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    RegisterID* result = 0;
+    for (ConstDeclNode* n = this; n; n = n->m_next)
+        result = n->emitCodeSingle(generator);
+
+    return result;
+}
+
+// ------------------------------ ConstStatementNode -----------------------------
+
+RegisterID* ConstStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    return generator.emitNode(m_next);
+}
+
+// ------------------------------ SourceElements -------------------------------
+
+
+inline StatementNode* SourceElements::lastStatement() const
+{
+    size_t size = m_statements.size();
+    return size ? m_statements[size - 1] : 0;
+}
+
+inline void SourceElements::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    size_t size = m_statements.size();
+    for (size_t i = 0; i < size; ++i)
+        generator.emitNode(dst, m_statements[i]);
+}
+
+// ------------------------------ BlockNode ------------------------------------
+
+inline StatementNode* BlockNode::lastStatement() const
+{
+    return m_statements ? m_statements->lastStatement() : 0;
+}
+
+RegisterID* BlockNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (m_statements)
+        m_statements->emitBytecode(generator, dst);
+    return 0;
+}
+
+// ------------------------------ EmptyStatementNode ---------------------------
+
+RegisterID* EmptyStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    return dst;
+}
+
+// ------------------------------ DebuggerStatementNode ---------------------------
+
+RegisterID* DebuggerStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(DidReachBreakpoint, firstLine(), lastLine());
+    return dst;
+}
+
+// ------------------------------ ExprStatementNode ----------------------------
+
+RegisterID* ExprStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    ASSERT(m_expr);
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine()); 
+    return generator.emitNode(dst, m_expr);
+}
+
+// ------------------------------ VarStatementNode ----------------------------
+
+RegisterID* VarStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    ASSERT(m_expr);
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    return generator.emitNode(m_expr);
+}
+
+// ------------------------------ IfNode ---------------------------------------
+
+RegisterID* IfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    
+    RefPtr<Label> afterThen = generator.newLabel();
+
+    if (m_condition->hasConditionContextCodegen()) {
+        RefPtr<Label> beforeThen = generator.newLabel();
+        generator.emitNodeInConditionContext(m_condition, beforeThen.get(), afterThen.get(), true);
+        generator.emitLabel(beforeThen.get());
+    } else {
+        RegisterID* cond = generator.emitNode(m_condition);
+        generator.emitJumpIfFalse(cond, afterThen.get());
+    }
+
+    generator.emitNode(dst, m_ifBlock);
+    generator.emitLabel(afterThen.get());
+
+    // FIXME: This should return the last statement executed so that it can be returned as a Completion.
+    return 0;
+}
+
+// ------------------------------ IfElseNode ---------------------------------------
+
+RegisterID* IfElseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    
+    RefPtr<Label> beforeElse = generator.newLabel();
+    RefPtr<Label> afterElse = generator.newLabel();
+
+    if (m_condition->hasConditionContextCodegen()) {
+        RefPtr<Label> beforeThen = generator.newLabel();
+        generator.emitNodeInConditionContext(m_condition, beforeThen.get(), beforeElse.get(), true);
+        generator.emitLabel(beforeThen.get());
+    } else {
+        RegisterID* cond = generator.emitNode(m_condition);
+        generator.emitJumpIfFalse(cond, beforeElse.get());
+    }
+
+    generator.emitNode(dst, m_ifBlock);
+    generator.emitJump(afterElse.get());
+
+    generator.emitLabel(beforeElse.get());
+
+    generator.emitNode(dst, m_elseBlock);
+
+    generator.emitLabel(afterElse.get());
+
+    // FIXME: This should return the last statement executed so that it can be returned as a Completion.
+    return 0;
+}
+
+// ------------------------------ DoWhileNode ----------------------------------
+
+RegisterID* DoWhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
+
+    RefPtr<Label> topOfLoop = generator.newLabel();
+    generator.emitLabel(topOfLoop.get());
+
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+   
+    RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
+
+    generator.emitLabel(scope->continueTarget());
+#ifndef QT_BUILD_SCRIPT_LIB
+    generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
+#endif
+    if (m_expr->hasConditionContextCodegen())
+        generator.emitNodeInConditionContext(m_expr, topOfLoop.get(), scope->breakTarget(), false);
+    else {
+        RegisterID* cond = generator.emitNode(m_expr);
+        generator.emitJumpIfTrue(cond, topOfLoop.get());
+    }
+
+    generator.emitLabel(scope->breakTarget());
+    return result.get();
+}
+
+// ------------------------------ WhileNode ------------------------------------
+
+RegisterID* WhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
+
+#ifdef QT_BUILD_SCRIPT_LIB
+    generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
+#endif
+    generator.emitJump(scope->continueTarget());
+
+    RefPtr<Label> topOfLoop = generator.newLabel();
+    generator.emitLabel(topOfLoop.get());
+    
+    generator.emitNode(dst, m_statement);
+
+    generator.emitLabel(scope->continueTarget());
+#ifndef QT_BUILD_SCRIPT_LIB
+    generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
+#endif
+
+    if (m_expr->hasConditionContextCodegen())
+        generator.emitNodeInConditionContext(m_expr, topOfLoop.get(), scope->breakTarget(), false);
+    else {
+        RegisterID* cond = generator.emitNode(m_expr);
+        generator.emitJumpIfTrue(cond, topOfLoop.get());
+    }
+
+    generator.emitLabel(scope->breakTarget());
+    
+    // FIXME: This should return the last statement executed so that it can be returned as a Completion
+    return 0;
+}
+
+// ------------------------------ ForNode --------------------------------------
+
+RegisterID* ForNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
+
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+
+    if (m_expr1)
+        generator.emitNode(generator.ignoredResult(), m_expr1);
+
+    RefPtr<Label> condition = generator.newLabel();
+    generator.emitJump(condition.get());
+
+    RefPtr<Label> topOfLoop = generator.newLabel();
+    generator.emitLabel(topOfLoop.get());
+
+    RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
+
+    generator.emitLabel(scope->continueTarget());
+#ifndef QT_BUILD_SCRIPT_LIB
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+#endif
+    if (m_expr3)
+        generator.emitNode(generator.ignoredResult(), m_expr3);
+
+    generator.emitLabel(condition.get());
+    if (m_expr2) {
+        if (m_expr2->hasConditionContextCodegen())
+            generator.emitNodeInConditionContext(m_expr2, topOfLoop.get(), scope->breakTarget(), false);
+        else {
+            RegisterID* cond = generator.emitNode(m_expr2);
+            generator.emitJumpIfTrue(cond, topOfLoop.get());
+        }
+    } else
+        generator.emitJump(topOfLoop.get());
+
+    generator.emitLabel(scope->breakTarget());
+    return result.get();
+}
+
+// ------------------------------ ForInNode ------------------------------------
+
+RegisterID* ForInNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
+
+    if (!m_lexpr->isLocation())
+        return emitThrowError(generator, ReferenceError, "Left side of for-in statement is not a reference.");
+
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+
+    if (m_init)
+        generator.emitNode(generator.ignoredResult(), m_init);
+
+    RefPtr<RegisterID> base = generator.newTemporary();
+    generator.emitNode(base.get(), m_expr);
+    RefPtr<RegisterID> i = generator.newTemporary();
+    RefPtr<RegisterID> size = generator.newTemporary();
+    RefPtr<RegisterID> expectedSubscript;
+    RefPtr<RegisterID> iter = generator.emitGetPropertyNames(generator.newTemporary(), base.get(), i.get(), size.get(), scope->breakTarget());
+    generator.emitJump(scope->continueTarget());
+
+    RefPtr<Label> loopStart = generator.newLabel();
+    generator.emitLabel(loopStart.get());
+
+    RegisterID* propertyName;
+    bool optimizedForinAccess = false;
+    if (m_lexpr->isResolveNode()) {
+        const Identifier& ident = static_cast<ResolveNode*>(m_lexpr)->identifier();
+        propertyName = generator.registerFor(ident);
+        if (!propertyName) {
+            propertyName = generator.newTemporary();
+            RefPtr<RegisterID> protect = propertyName;
+            RegisterID* base = generator.emitResolveBase(generator.newTemporary(), ident);
+
+            generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+            generator.emitPutById(base, ident, propertyName);
+        } else {
+            expectedSubscript = generator.emitMove(generator.newTemporary(), propertyName);
+            generator.pushOptimisedForIn(expectedSubscript.get(), iter.get(), i.get(), propertyName);
+            optimizedForinAccess = true;
+        }
+    } else if (m_lexpr->isDotAccessorNode()) {
+        DotAccessorNode* assignNode = static_cast<DotAccessorNode*>(m_lexpr);
+        const Identifier& ident = assignNode->identifier();
+        propertyName = generator.newTemporary();
+        RefPtr<RegisterID> protect = propertyName;
+        RegisterID* base = generator.emitNode(assignNode->base());
+
+        generator.emitExpressionInfo(assignNode->divot(), assignNode->startOffset(), assignNode->endOffset());
+        generator.emitPutById(base, ident, propertyName);
+    } else {
+        ASSERT(m_lexpr->isBracketAccessorNode());
+        BracketAccessorNode* assignNode = static_cast<BracketAccessorNode*>(m_lexpr);
+        propertyName = generator.newTemporary();
+        RefPtr<RegisterID> protect = propertyName;
+        RefPtr<RegisterID> base = generator.emitNode(assignNode->base());
+        RegisterID* subscript = generator.emitNode(assignNode->subscript());
+        
+        generator.emitExpressionInfo(assignNode->divot(), assignNode->startOffset(), assignNode->endOffset());
+        generator.emitPutByVal(base.get(), subscript, propertyName);
+    }   
+
+    generator.emitNode(dst, m_statement);
+
+    if (optimizedForinAccess)
+        generator.popOptimisedForIn();
+
+    generator.emitLabel(scope->continueTarget());
+    generator.emitNextPropertyName(propertyName, base.get(), i.get(), size.get(), iter.get(), loopStart.get());
+#ifndef QT_BUILD_SCRIPT_LIB
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+#endif
+    generator.emitLabel(scope->breakTarget());
+    return dst;
+}
+
+// ------------------------------ ContinueNode ---------------------------------
+
+// ECMA 12.7
+RegisterID* ContinueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    
+    LabelScope* scope = generator.continueTarget(m_ident);
+
+    if (!scope)
+        return m_ident.isEmpty()
+            ? emitThrowError(generator, SyntaxError, "Invalid continue statement.")
+            : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
+
+    generator.emitJumpScopes(scope->continueTarget(), scope->scopeDepth());
+    return dst;
+}
+
+// ------------------------------ BreakNode ------------------------------------
+
+// ECMA 12.8
+RegisterID* BreakNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    
+    LabelScope* scope = generator.breakTarget(m_ident);
+    
+    if (!scope)
+        return m_ident.isEmpty()
+            ? emitThrowError(generator, SyntaxError, "Invalid break statement.")
+            : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
+
+    generator.emitJumpScopes(scope->breakTarget(), scope->scopeDepth());
+    return dst;
+}
+
+// ------------------------------ ReturnNode -----------------------------------
+
+RegisterID* ReturnNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    if (generator.codeType() != FunctionCode)
+        return emitThrowError(generator, SyntaxError, "Invalid return statement.");
+
+    if (dst == generator.ignoredResult())
+        dst = 0;
+    RegisterID* r0 = m_value ? generator.emitNode(dst, m_value) : generator.emitLoad(dst, jsUndefined());
+    RefPtr<RegisterID> returnRegister;
+    if (generator.scopeDepth()) {
+        RefPtr<Label> l0 = generator.newLabel();
+        if (generator.hasFinaliser() && !r0->isTemporary()) {
+            returnRegister = generator.emitMove(generator.newTemporary(), r0);
+            r0 = returnRegister.get();
+        }
+        generator.emitJumpScopes(l0.get(), 0);
+        generator.emitLabel(l0.get());
+    }
+    generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine());
+    return generator.emitReturn(r0);
+}
+
+// ------------------------------ WithNode -------------------------------------
+
+RegisterID* WithNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    
+    RefPtr<RegisterID> scope = generator.newTemporary();
+    generator.emitNode(scope.get(), m_expr); // scope must be protected until popped
+    generator.emitExpressionInfo(m_divot, m_expressionLength, 0);
+    generator.emitPushScope(scope.get());
+    RegisterID* result = generator.emitNode(dst, m_statement);
+    generator.emitPopScope();
+    return result;
+}
+
+// ------------------------------ CaseClauseNode --------------------------------
+
+inline void CaseClauseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (m_statements)
+        m_statements->emitBytecode(generator, dst);
+}
+
+// ------------------------------ CaseBlockNode --------------------------------
+
+enum SwitchKind { 
+    SwitchUnset = 0,
+    SwitchNumber = 1, 
+    SwitchString = 2, 
+    SwitchNeither = 3 
+};
+
+static void processClauseList(ClauseListNode* list, Vector<ExpressionNode*, 8>& literalVector, SwitchKind& typeForTable, bool& singleCharacterSwitch, int32_t& min_num, int32_t& max_num)
+{
+    for (; list; list = list->getNext()) {
+        ExpressionNode* clauseExpression = list->getClause()->expr();
+        literalVector.append(clauseExpression);
+        if (clauseExpression->isNumber()) {
+            double value = static_cast<NumberNode*>(clauseExpression)->value();
+            int32_t intVal = static_cast<int32_t>(value);
+            if ((typeForTable & ~SwitchNumber) || (intVal != value)) {
+                typeForTable = SwitchNeither;
+                break;
+            }
+            if (intVal < min_num)
+                min_num = intVal;
+            if (intVal > max_num)
+                max_num = intVal;
+            typeForTable = SwitchNumber;
+            continue;
+        }
+        if (clauseExpression->isString()) {
+            if (typeForTable & ~SwitchString) {
+                typeForTable = SwitchNeither;
+                break;
+            }
+            const UString& value = static_cast<StringNode*>(clauseExpression)->value().ustring();
+            if (singleCharacterSwitch &= value.size() == 1) {
+                int32_t intVal = value.rep()->data()[0];
+                if (intVal < min_num)
+                    min_num = intVal;
+                if (intVal > max_num)
+                    max_num = intVal;
+            }
+            typeForTable = SwitchString;
+            continue;
+        }
+        typeForTable = SwitchNeither;
+        break;        
+    }
+}
+    
+SwitchInfo::SwitchType CaseBlockNode::tryOptimizedSwitch(Vector<ExpressionNode*, 8>& literalVector, int32_t& min_num, int32_t& max_num)
+{
+    SwitchKind typeForTable = SwitchUnset;
+    bool singleCharacterSwitch = true;
+    
+    processClauseList(m_list1, literalVector, typeForTable, singleCharacterSwitch, min_num, max_num);
+    processClauseList(m_list2, literalVector, typeForTable, singleCharacterSwitch, min_num, max_num);
+    
+    if (typeForTable == SwitchUnset || typeForTable == SwitchNeither)
+        return SwitchInfo::SwitchNone;
+    
+    if (typeForTable == SwitchNumber) {
+        int32_t range = max_num - min_num;
+        if (min_num <= max_num && range <= 1000 && (range / literalVector.size()) < 10)
+            return SwitchInfo::SwitchImmediate;
+        return SwitchInfo::SwitchNone;
+    } 
+    
+    ASSERT(typeForTable == SwitchString);
+    
+    if (singleCharacterSwitch) {
+        int32_t range = max_num - min_num;
+        if (min_num <= max_num && range <= 1000 && (range / literalVector.size()) < 10)
+            return SwitchInfo::SwitchCharacter;
+    }
+
+    return SwitchInfo::SwitchString;
+}
+
+RegisterID* CaseBlockNode::emitBytecodeForBlock(BytecodeGenerator& generator, RegisterID* switchExpression, RegisterID* dst)
+{
+    RefPtr<Label> defaultLabel;
+    Vector<RefPtr<Label>, 8> labelVector;
+    Vector<ExpressionNode*, 8> literalVector;
+    int32_t min_num = std::numeric_limits<int32_t>::max();
+    int32_t max_num = std::numeric_limits<int32_t>::min();
+    SwitchInfo::SwitchType switchType = tryOptimizedSwitch(literalVector, min_num, max_num);
+
+    if (switchType != SwitchInfo::SwitchNone) {
+        // Prepare the various labels
+        for (uint32_t i = 0; i < literalVector.size(); i++)
+            labelVector.append(generator.newLabel());
+        defaultLabel = generator.newLabel();
+        generator.beginSwitch(switchExpression, switchType);
+    } else {
+        // Setup jumps
+        for (ClauseListNode* list = m_list1; list; list = list->getNext()) {
+            RefPtr<RegisterID> clauseVal = generator.newTemporary();
+            generator.emitNode(clauseVal.get(), list->getClause()->expr());
+            generator.emitBinaryOp(op_stricteq, clauseVal.get(), clauseVal.get(), switchExpression, OperandTypes());
+            labelVector.append(generator.newLabel());
+            generator.emitJumpIfTrue(clauseVal.get(), labelVector[labelVector.size() - 1].get());
+        }
+        
+        for (ClauseListNode* list = m_list2; list; list = list->getNext()) {
+            RefPtr<RegisterID> clauseVal = generator.newTemporary();
+            generator.emitNode(clauseVal.get(), list->getClause()->expr());
+            generator.emitBinaryOp(op_stricteq, clauseVal.get(), clauseVal.get(), switchExpression, OperandTypes());
+            labelVector.append(generator.newLabel());
+            generator.emitJumpIfTrue(clauseVal.get(), labelVector[labelVector.size() - 1].get());
+        }
+        defaultLabel = generator.newLabel();
+        generator.emitJump(defaultLabel.get());
+    }
+
+    RegisterID* result = 0;
+
+    size_t i = 0;
+    for (ClauseListNode* list = m_list1; list; list = list->getNext()) {
+        generator.emitLabel(labelVector[i++].get());
+        list->getClause()->emitBytecode(generator, dst);
+    }
+
+    if (m_defaultClause) {
+        generator.emitLabel(defaultLabel.get());
+        m_defaultClause->emitBytecode(generator, dst);
+    }
+
+    for (ClauseListNode* list = m_list2; list; list = list->getNext()) {
+        generator.emitLabel(labelVector[i++].get());
+        list->getClause()->emitBytecode(generator, dst);
+    }
+    if (!m_defaultClause)
+        generator.emitLabel(defaultLabel.get());
+
+    ASSERT(i == labelVector.size());
+    if (switchType != SwitchInfo::SwitchNone) {
+        ASSERT(labelVector.size() == literalVector.size());
+        generator.endSwitch(labelVector.size(), labelVector.data(), literalVector.data(), defaultLabel.get(), min_num, max_num);
+    }
+    return result;
+}
+
+// ------------------------------ SwitchNode -----------------------------------
+
+RegisterID* SwitchNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+    
+    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Switch);
+
+    RefPtr<RegisterID> r0 = generator.emitNode(m_expr);
+    RegisterID* r1 = m_block->emitBytecodeForBlock(generator, r0.get(), dst);
+
+    generator.emitLabel(scope->breakTarget());
+    return r1;
+}
+
+// ------------------------------ LabelNode ------------------------------------
+
+RegisterID* LabelNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+
+    if (generator.breakTarget(m_name))
+        return emitThrowError(generator, SyntaxError, "Duplicate label: %s.", m_name);
+
+    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::NamedLabel, &m_name);
+    RegisterID* r0 = generator.emitNode(dst, m_statement);
+
+    generator.emitLabel(scope->breakTarget());
+    return r0;
+}
+
+// ------------------------------ ThrowNode ------------------------------------
+
+RegisterID* ThrowNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+
+    if (dst == generator.ignoredResult())
+        dst = 0;
+    RefPtr<RegisterID> expr = generator.emitNode(m_expr);
+    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+    generator.emitThrow(expr.get());
+    return 0;
+}
+
+// ------------------------------ TryNode --------------------------------------
+
+RegisterID* TryNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    // NOTE: The catch and finally blocks must be labeled explicitly, so the
+    // optimizer knows they may be jumped to from anywhere.
+
+#ifndef QT_BUILD_SCRIPT_LIB
+    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+#endif
+
+    RefPtr<Label> tryStartLabel = generator.newLabel();
+    RefPtr<Label> finallyStart;
+    RefPtr<RegisterID> finallyReturnAddr;
+    if (m_finallyBlock) {
+        finallyStart = generator.newLabel();
+        finallyReturnAddr = generator.newTemporary();
+        generator.pushFinallyContext(finallyStart.get(), finallyReturnAddr.get());
+    }
+
+    generator.emitLabel(tryStartLabel.get());
+    generator.emitNode(dst, m_tryBlock);
+
+    if (m_catchBlock) {
+        RefPtr<Label> catchEndLabel = generator.newLabel();
+        
+        // Normal path: jump over the catch block.
+        generator.emitJump(catchEndLabel.get());
+
+        // Uncaught exception path: the catch block.
+        RefPtr<Label> here = generator.emitLabel(generator.newLabel().get());
+        RefPtr<RegisterID> exceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), here.get());
+        if (m_catchHasEval) {
+            RefPtr<RegisterID> dynamicScopeObject = generator.emitNewObject(generator.newTemporary());
+            generator.emitPutById(dynamicScopeObject.get(), m_exceptionIdent, exceptionRegister.get());
+            generator.emitMove(exceptionRegister.get(), dynamicScopeObject.get());
+            generator.emitPushScope(exceptionRegister.get());
+        } else
+            generator.emitPushNewScope(exceptionRegister.get(), m_exceptionIdent, exceptionRegister.get());
+        generator.emitNode(dst, m_catchBlock);
+        generator.emitPopScope();
+        generator.emitLabel(catchEndLabel.get());
+    }
+
+    if (m_finallyBlock) {
+        generator.popFinallyContext();
+        // there may be important registers live at the time we jump
+        // to a finally block (such as for a return or throw) so we
+        // ref the highest register ever used as a conservative
+        // approach to not clobbering anything important
+        RefPtr<RegisterID> highestUsedRegister = generator.highestUsedRegister();
+        RefPtr<Label> finallyEndLabel = generator.newLabel();
+
+        // Normal path: invoke the finally block, then jump over it.
+        generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
+        generator.emitJump(finallyEndLabel.get());
+
+        // Uncaught exception path: invoke the finally block, then re-throw the exception.
+        RefPtr<Label> here = generator.emitLabel(generator.newLabel().get());
+        RefPtr<RegisterID> tempExceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), here.get());
+        generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
+        generator.emitThrow(tempExceptionRegister.get());
+
+        // The finally block.
+        generator.emitLabel(finallyStart.get());
+        generator.emitNode(dst, m_finallyBlock);
+        generator.emitSubroutineReturn(finallyReturnAddr.get());
+
+        generator.emitLabel(finallyEndLabel.get());
+    }
+
+    return dst;
+}
+
+// ------------------------------ ScopeNode -----------------------------
+
+inline void ScopeNode::emitStatementsBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (m_data->m_statements)
+        m_data->m_statements->emitBytecode(generator, dst);
+}
+
+// ------------------------------ ProgramNode -----------------------------
+
+RegisterID* ProgramNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine());
+
+    RefPtr<RegisterID> dstRegister = generator.newTemporary();
+    generator.emitLoad(dstRegister.get(), jsUndefined());
+    emitStatementsBytecode(generator, dstRegister.get());
+
+    generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine());
+    generator.emitEnd(dstRegister.get());
+    return 0;
+}
+
+// ------------------------------ EvalNode -----------------------------
+
+RegisterID* EvalNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine());
+
+    RefPtr<RegisterID> dstRegister = generator.newTemporary();
+    generator.emitLoad(dstRegister.get(), jsUndefined());
+    emitStatementsBytecode(generator, dstRegister.get());
+
+    generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine());
+    generator.emitEnd(dstRegister.get());
+    return 0;
+}
+
+// ------------------------------ FunctionBodyNode -----------------------------
+
+RegisterID* FunctionBodyNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+    generator.emitDebugHook(DidEnterCallFrame, firstLine(), lastLine());
+    emitStatementsBytecode(generator, generator.ignoredResult());
+    StatementNode* singleStatement = this->singleStatement();
+    if (singleStatement && singleStatement->isBlock()) {
+        StatementNode* lastStatementInBlock = static_cast<BlockNode*>(singleStatement)->lastStatement();
+        if (lastStatementInBlock && lastStatementInBlock->isReturnNode())
+            return 0;
+    }
+
+    RegisterID* r0 = generator.emitLoad(0, jsUndefined());
+    generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine());
+    generator.emitReturn(r0);
+    return 0;
+}
+
+// ------------------------------ FuncDeclNode ---------------------------------
+
+RegisterID* FuncDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    if (dst == generator.ignoredResult())
+        dst = 0;
+    return dst;
+}
+
+// ------------------------------ FuncExprNode ---------------------------------
+
+RegisterID* FuncExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    return generator.emitNewFunctionExpression(generator.finalDestination(dst), this);
+}
+
+} // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/config.h b/src/3rdparty/javascriptcore/JavaScriptCore/config.h
index 5e70265..d5fdfe9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/config.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/config.h
@@ -25,26 +25,26 @@
 
 #include <wtf/Platform.h>
 
-#if !defined(JS_EXPORTDATA)
-#if PLATFORM(WIN_OS) && !defined(BUILDING_WX__) && !COMPILER(GCC)
+#if OS(WINDOWS) && !defined(BUILDING_WX__) && !COMPILER(GCC)
 #if defined(BUILDING_JavaScriptCore) || defined(BUILDING_WTF)
 #define JS_EXPORTDATA __declspec(dllexport)
 #else
 #define JS_EXPORTDATA __declspec(dllimport)
 #endif
+#define JS_EXPORTCLASS JS_EXPORTDATA
 #else
 #define JS_EXPORTDATA
-#endif
+#define JS_EXPORTCLASS
 #endif
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 
 // If we don't define these, they get defined in windef.h. 
 // We want to use std::min and std::max
 #define max max
 #define min min
 
-#if !COMPILER(MSVC7) && !PLATFORM(WINCE)
+#if !COMPILER(MSVC7) && !OS(WINCE)
 // We need to define this before the first #include of stdlib.h or it won't contain rand_s.
 #ifndef _CRT_RAND_S
 #define _CRT_RAND_S
@@ -53,13 +53,12 @@
 
 #endif
 
-#if PLATFORM(FREEBSD) || PLATFORM(OPENBSD)
+#if OS(FREEBSD) || OS(OPENBSD)
 #define HAVE_PTHREAD_NP_H 1
 #endif
 
 /* FIXME: if all platforms have these, do they really need #defines? */
 #define HAVE_STDINT_H 1
-#define HAVE_STRING_H 1
 
 #define WTF_CHANGES 1
 
@@ -76,3 +75,15 @@
 #include <wtf/DisallowCType.h>
 #endif
 
+#if PLATFORM(CHROMIUM)
+#if !defined(WTF_USE_V8)
+#define WTF_USE_V8 1
+#endif
+#endif /* PLATFORM(CHROMIUM) */
+
+#if !defined(WTF_USE_V8)
+#define WTF_USE_V8 0
+#endif /* !defined(WTF_USE_V8) */
+
+/* Using V8 implies not using JSC and vice versa */
+#define WTF_USE_JSC !WTF_USE_V8
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.cpp
index db02329..1d2e4fb 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.cpp
@@ -67,8 +67,9 @@ void Debugger::recompileAllJSFunctions(JSGlobalData* globalData)
     FunctionExecutableSet functionExecutables;
     SourceProviderMap sourceProviders;
 
-    Heap::iterator heapEnd = globalData->heap.primaryHeapEnd();
-    for (Heap::iterator it = globalData->heap.primaryHeapBegin(); it != heapEnd; ++it) {
+    LiveObjectIterator it = globalData->heap.primaryHeapBegin();
+    LiveObjectIterator heapEnd = globalData->heap.primaryHeapEnd();
+    for ( ; it != heapEnd; ++it) {
         if (!(*it)->inherits(&JSFunction::info))
             continue;
 
@@ -100,12 +101,12 @@ JSValue evaluateInGlobalCallFrame(const UString& script, JSValue& exception, JSG
 {
     CallFrame* globalCallFrame = globalObject->globalExec();
 
-    EvalExecutable eval(globalCallFrame, makeSource(script));
-    JSObject* error = eval.compile(globalCallFrame, globalCallFrame->scopeChain());
+    RefPtr<EvalExecutable> eval = EvalExecutable::create(globalCallFrame, makeSource(script));
+    JSObject* error = eval->compile(globalCallFrame, globalCallFrame->scopeChain());
     if (error)
         return error;
 
-    return globalObject->globalData()->interpreter->execute(&eval, globalCallFrame, globalObject, globalCallFrame->scopeChain(), &exception);
+    return globalObject->globalData()->interpreter->execute(eval.get(), globalCallFrame, globalObject, globalCallFrame->scopeChain(), &exception);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.h b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.h
index 811818d..3725478 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/Debugger.h
@@ -47,8 +47,7 @@ namespace JSC {
         {
             UNUSED_PARAM(id);
         };
-        virtual void scriptLoad(QT_PREPEND_NAMESPACE(qint64) id,
-                            const UString &program,
+        virtual void scriptLoad(QT_PREPEND_NAMESPACE(qint64) id, const UString &program,
                             const UString &fileName, int baseLineNumber)
         {
             UNUSED_PARAM(id);
@@ -90,14 +89,14 @@ namespace JSC {
 #endif
 
         virtual void sourceParsed(ExecState*, const SourceCode&, int errorLineNumber, const UString& errorMessage) = 0;
-        virtual void exception(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber) = 0;
-        virtual void atStatement(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber, int column) = 0;
+        virtual void exception(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber, bool hasHandler) = 0;
+        virtual void atStatement(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber) = 0;
         virtual void callEvent(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber) = 0;
         virtual void returnEvent(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber) = 0;
 
         virtual void willExecuteProgram(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber) = 0;
         virtual void didExecuteProgram(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber) = 0;
-        virtual void didReachBreakpoint(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber, int column) = 0;
+        virtual void didReachBreakpoint(const DebuggerCallFrame&, intptr_t sourceID, int lineNumber) = 0;
 
         void recompileAllJSFunctions(JSGlobalData*);
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.cpp
index fa41374..0444d23 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.cpp
@@ -66,19 +66,19 @@ void DebuggerActivation::putWithAttributes(ExecState* exec, const Identifier& pr
     m_activation->putWithAttributes(exec, propertyName, value, attributes);
 }
 
-bool DebuggerActivation::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool DebuggerActivation::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
-    return m_activation->deleteProperty(exec, propertyName, checkDontDelete);
+    return m_activation->deleteProperty(exec, propertyName);
 }
 
-void DebuggerActivation::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void DebuggerActivation::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
-    m_activation->getPropertyNames(exec, propertyNames);
+    m_activation->getPropertyNames(exec, propertyNames, mode);
 }
 
-bool DebuggerActivation::getPropertyAttributes(JSC::ExecState* exec, const Identifier& propertyName, unsigned& attributes) const
+bool DebuggerActivation::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
 {
-    return m_activation->getPropertyAttributes(exec, propertyName, attributes);
+    return m_activation->getOwnPropertyDescriptor(exec, propertyName, descriptor);
 }
 
 void DebuggerActivation::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunction, unsigned attributes)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.h b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.h
index 9bb1acd..354fcb8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerActivation.h
@@ -41,9 +41,9 @@ namespace JSC {
         virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
         virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
         virtual void putWithAttributes(ExecState*, const Identifier& propertyName, JSValue, unsigned attributes);
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
-        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, bool includeNonEnumerable = false);
-        virtual bool getPropertyAttributes(ExecState*, const Identifier& propertyName, unsigned& attributes) const;
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
+        virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
         virtual void defineGetter(ExecState*, const Identifier& propertyName, JSObject* getterFunction, unsigned attributes);
         virtual void defineSetter(ExecState*, const Identifier& propertyName, JSObject* setterFunction, unsigned attributes);
         virtual JSValue lookupGetter(ExecState*, const Identifier& propertyName);
@@ -51,9 +51,12 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype) 
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasDefaultGetPropertyNames)); 
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags)); 
         }
 
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | JSObject::StructureFlags;
+
     private:
         JSActivation* m_activation;
     };
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerCallFrame.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerCallFrame.cpp
index 88b14e6..c6b4223 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerCallFrame.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/debugger/DebuggerCallFrame.cpp
@@ -44,7 +44,7 @@ const UString* DebuggerCallFrame::functionName() const
     JSFunction* function = asFunction(m_callFrame->callee());
     if (!function)
         return 0;
-    return &function->name(&m_callFrame->globalData());
+    return &function->name(m_callFrame);
 }
     
 UString DebuggerCallFrame::calculatedFunctionName() const
@@ -55,7 +55,7 @@ UString DebuggerCallFrame::calculatedFunctionName() const
     JSFunction* function = asFunction(m_callFrame->callee());
     if (!function)
         return 0;
-    return function->calculatedDisplayName(&m_callFrame->globalData());
+    return function->calculatedDisplayName(m_callFrame);
 }
 
 DebuggerCallFrame::Type DebuggerCallFrame::type() const
@@ -79,12 +79,12 @@ JSValue DebuggerCallFrame::evaluate(const UString& script, JSValue& exception) c
     if (!m_callFrame->codeBlock())
         return JSValue();
 
-    EvalExecutable eval(m_callFrame, makeSource(script));
-    JSObject* error = eval.compile(m_callFrame, m_callFrame->scopeChain());
+    RefPtr<EvalExecutable> eval = EvalExecutable::create(m_callFrame, makeSource(script));
+    JSObject* error = eval->compile(m_callFrame, m_callFrame->scopeChain());
     if (error)
         return error;
 
-    return m_callFrame->scopeChain()->globalData->interpreter->execute(&eval, m_callFrame, thisObject(), m_callFrame->scopeChain(), &exception);
+    return m_callFrame->scopeChain()->globalData->interpreter->execute(eval.get(), m_callFrame, thisObject(), m_callFrame->scopeChain(), &exception);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/ArrayPrototype.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/ArrayPrototype.lut.h
index 5732add..860176e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/ArrayPrototype.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/ArrayPrototype.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../runtime/ArrayPrototype.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/ArrayPrototype.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/DatePrototype.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/DatePrototype.lut.h
index 8b1c735..395669a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/DatePrototype.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/DatePrototype.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../runtime/DatePrototype.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/DatePrototype.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/GeneratedJITStubs_RVCT.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/GeneratedJITStubs_RVCT.h
new file mode 100644
index 0000000..ef77e19
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/GeneratedJITStubs_RVCT.h
@@ -0,0 +1,1199 @@
+extern "C" EncodedJSValue JITStubThunked_op_convert_this(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_convert_this(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_convert_this
+    str lr, [sp, #32]
+    bl JITStubThunked_op_convert_this
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_end(STUB_ARGS_DECLARATION);
+__asm void cti_op_end(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_end
+    str lr, [sp, #32]
+    bl JITStubThunked_op_end
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_add(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_add(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_add
+    str lr, [sp, #32]
+    bl JITStubThunked_op_add
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_pre_inc(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_pre_inc(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_pre_inc
+    str lr, [sp, #32]
+    bl JITStubThunked_op_pre_inc
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_timeout_check(STUB_ARGS_DECLARATION);
+__asm int cti_timeout_check(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_timeout_check
+    str lr, [sp, #32]
+    bl JITStubThunked_timeout_check
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_register_file_check(STUB_ARGS_DECLARATION);
+__asm void cti_register_file_check(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_register_file_check
+    str lr, [sp, #32]
+    bl JITStubThunked_register_file_check
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_op_loop_if_lesseq(STUB_ARGS_DECLARATION);
+__asm int cti_op_loop_if_lesseq(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_loop_if_lesseq
+    str lr, [sp, #32]
+    bl JITStubThunked_op_loop_if_lesseq
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_new_object(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_new_object(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_new_object
+    str lr, [sp, #32]
+    bl JITStubThunked_op_new_object
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_by_id_generic(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_by_id_generic(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_by_id_generic
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_by_id_generic
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_generic(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_generic(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_generic
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_generic
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_by_id(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_by_id(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_by_id
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_by_id
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_by_id_fail(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_by_id_fail(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_by_id_fail
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_by_id_fail
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_put_by_id_transition_realloc(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_put_by_id_transition_realloc(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_by_id_transition_realloc
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_by_id_transition_realloc
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_method_check(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_method_check(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_method_check
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_method_check
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_self_fail(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_self_fail(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_self_fail
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_self_fail
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_proto_list(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_proto_list(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_proto_list
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_proto_list
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_proto_list_full(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_proto_list_full(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_proto_list_full
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_proto_list_full
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_proto_fail(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_proto_fail(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_proto_fail
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_proto_fail
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_array_fail(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_array_fail(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_array_fail
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_array_fail
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_id_string_fail(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_id_string_fail(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_id_string_fail
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_id_string_fail
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_instanceof(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_instanceof(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_instanceof
+    str lr, [sp, #32]
+    bl JITStubThunked_op_instanceof
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_del_by_id(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_del_by_id(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_del_by_id
+    str lr, [sp, #32]
+    bl JITStubThunked_op_del_by_id
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_mul(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_mul(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_mul
+    str lr, [sp, #32]
+    bl JITStubThunked_op_mul
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_new_func(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_new_func(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_new_func
+    str lr, [sp, #32]
+    bl JITStubThunked_op_new_func
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void* JITStubThunked_op_call_JSFunction(STUB_ARGS_DECLARATION);
+__asm void* cti_op_call_JSFunction(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_call_JSFunction
+    str lr, [sp, #32]
+    bl JITStubThunked_op_call_JSFunction
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" VoidPtrPair JITStubThunked_op_call_arityCheck(STUB_ARGS_DECLARATION);
+__asm VoidPtrPair cti_op_call_arityCheck(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_call_arityCheck
+    str lr, [sp, #32]
+    bl JITStubThunked_op_call_arityCheck
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void* JITStubThunked_vm_lazyLinkCall(STUB_ARGS_DECLARATION);
+__asm void* cti_vm_lazyLinkCall(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_vm_lazyLinkCall
+    str lr, [sp, #32]
+    bl JITStubThunked_vm_lazyLinkCall
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_push_activation(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_push_activation(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_push_activation
+    str lr, [sp, #32]
+    bl JITStubThunked_op_push_activation
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_call_NotJSFunction(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_call_NotJSFunction(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_call_NotJSFunction
+    str lr, [sp, #32]
+    bl JITStubThunked_op_call_NotJSFunction
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_create_arguments(STUB_ARGS_DECLARATION);
+__asm void cti_op_create_arguments(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_create_arguments
+    str lr, [sp, #32]
+    bl JITStubThunked_op_create_arguments
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_create_arguments_no_params(STUB_ARGS_DECLARATION);
+__asm void cti_op_create_arguments_no_params(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_create_arguments_no_params
+    str lr, [sp, #32]
+    bl JITStubThunked_op_create_arguments_no_params
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_tear_off_activation(STUB_ARGS_DECLARATION);
+__asm void cti_op_tear_off_activation(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_tear_off_activation
+    str lr, [sp, #32]
+    bl JITStubThunked_op_tear_off_activation
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_tear_off_arguments(STUB_ARGS_DECLARATION);
+__asm void cti_op_tear_off_arguments(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_tear_off_arguments
+    str lr, [sp, #32]
+    bl JITStubThunked_op_tear_off_arguments
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_profile_will_call(STUB_ARGS_DECLARATION);
+__asm void cti_op_profile_will_call(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_profile_will_call
+    str lr, [sp, #32]
+    bl JITStubThunked_op_profile_will_call
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_profile_did_call(STUB_ARGS_DECLARATION);
+__asm void cti_op_profile_did_call(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_profile_did_call
+    str lr, [sp, #32]
+    bl JITStubThunked_op_profile_did_call
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_ret_scopeChain(STUB_ARGS_DECLARATION);
+__asm void cti_op_ret_scopeChain(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_ret_scopeChain
+    str lr, [sp, #32]
+    bl JITStubThunked_op_ret_scopeChain
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_new_array(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_new_array(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_new_array
+    str lr, [sp, #32]
+    bl JITStubThunked_op_new_array
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_resolve(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_resolve(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_resolve
+    str lr, [sp, #32]
+    bl JITStubThunked_op_resolve
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_construct_JSConstruct(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_construct_JSConstruct(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_construct_JSConstruct
+    str lr, [sp, #32]
+    bl JITStubThunked_op_construct_JSConstruct
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_construct_NotJSConstruct(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_construct_NotJSConstruct(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_construct_NotJSConstruct
+    str lr, [sp, #32]
+    bl JITStubThunked_op_construct_NotJSConstruct
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_val(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_val(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_val
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_val
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_val_string(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_val_string(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_val_string
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_val_string
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_get_by_val_byte_array(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_get_by_val_byte_array(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_by_val_byte_array
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_by_val_byte_array
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_sub(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_sub(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_sub
+    str lr, [sp, #32]
+    bl JITStubThunked_op_sub
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_by_val(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_by_val(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_by_val
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_by_val
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_by_val_byte_array(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_by_val_byte_array(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_by_val_byte_array
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_by_val_byte_array
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_lesseq(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_lesseq(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_lesseq
+    str lr, [sp, #32]
+    bl JITStubThunked_op_lesseq
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_op_load_varargs(STUB_ARGS_DECLARATION);
+__asm int cti_op_load_varargs(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_load_varargs
+    str lr, [sp, #32]
+    bl JITStubThunked_op_load_varargs
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_negate(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_negate(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_negate
+    str lr, [sp, #32]
+    bl JITStubThunked_op_negate
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_resolve_base(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_resolve_base(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_resolve_base
+    str lr, [sp, #32]
+    bl JITStubThunked_op_resolve_base
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_resolve_skip(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_resolve_skip(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_resolve_skip
+    str lr, [sp, #32]
+    bl JITStubThunked_op_resolve_skip
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_resolve_global(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_resolve_global(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_resolve_global
+    str lr, [sp, #32]
+    bl JITStubThunked_op_resolve_global
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_div(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_div(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_div
+    str lr, [sp, #32]
+    bl JITStubThunked_op_div
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_pre_dec(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_pre_dec(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_pre_dec
+    str lr, [sp, #32]
+    bl JITStubThunked_op_pre_dec
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_op_jless(STUB_ARGS_DECLARATION);
+__asm int cti_op_jless(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_jless
+    str lr, [sp, #32]
+    bl JITStubThunked_op_jless
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_op_jlesseq(STUB_ARGS_DECLARATION);
+__asm int cti_op_jlesseq(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_jlesseq
+    str lr, [sp, #32]
+    bl JITStubThunked_op_jlesseq
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_not(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_not(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_not
+    str lr, [sp, #32]
+    bl JITStubThunked_op_not
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_op_jtrue(STUB_ARGS_DECLARATION);
+__asm int cti_op_jtrue(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_jtrue
+    str lr, [sp, #32]
+    bl JITStubThunked_op_jtrue
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_post_inc(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_post_inc(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_post_inc
+    str lr, [sp, #32]
+    bl JITStubThunked_op_post_inc
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_op_eq(STUB_ARGS_DECLARATION);
+__asm int cti_op_eq(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_eq
+    str lr, [sp, #32]
+    bl JITStubThunked_op_eq
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_op_eq_strings(STUB_ARGS_DECLARATION);
+__asm int cti_op_eq_strings(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_eq_strings
+    str lr, [sp, #32]
+    bl JITStubThunked_op_eq_strings
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_lshift(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_lshift(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_lshift
+    str lr, [sp, #32]
+    bl JITStubThunked_op_lshift
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_bitand(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_bitand(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_bitand
+    str lr, [sp, #32]
+    bl JITStubThunked_op_bitand
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_rshift(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_rshift(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_rshift
+    str lr, [sp, #32]
+    bl JITStubThunked_op_rshift
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_bitnot(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_bitnot(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_bitnot
+    str lr, [sp, #32]
+    bl JITStubThunked_op_bitnot
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_resolve_with_base(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_resolve_with_base(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_resolve_with_base
+    str lr, [sp, #32]
+    bl JITStubThunked_op_resolve_with_base
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_new_func_exp(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_new_func_exp(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_new_func_exp
+    str lr, [sp, #32]
+    bl JITStubThunked_op_new_func_exp
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_mod(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_mod(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_mod
+    str lr, [sp, #32]
+    bl JITStubThunked_op_mod
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_less(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_less(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_less
+    str lr, [sp, #32]
+    bl JITStubThunked_op_less
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_post_dec(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_post_dec(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_post_dec
+    str lr, [sp, #32]
+    bl JITStubThunked_op_post_dec
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_urshift(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_urshift(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_urshift
+    str lr, [sp, #32]
+    bl JITStubThunked_op_urshift
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_bitxor(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_bitxor(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_bitxor
+    str lr, [sp, #32]
+    bl JITStubThunked_op_bitxor
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_new_regexp(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_new_regexp(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_new_regexp
+    str lr, [sp, #32]
+    bl JITStubThunked_op_new_regexp
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_bitor(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_bitor(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_bitor
+    str lr, [sp, #32]
+    bl JITStubThunked_op_bitor
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_call_eval(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_call_eval(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_call_eval
+    str lr, [sp, #32]
+    bl JITStubThunked_op_call_eval
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_throw(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_throw(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_throw
+    str lr, [sp, #32]
+    bl JITStubThunked_op_throw
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSPropertyNameIterator* JITStubThunked_op_get_pnames(STUB_ARGS_DECLARATION);
+__asm JSPropertyNameIterator* cti_op_get_pnames(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_get_pnames
+    str lr, [sp, #32]
+    bl JITStubThunked_op_get_pnames
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" int JITStubThunked_has_property(STUB_ARGS_DECLARATION);
+__asm int cti_has_property(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_has_property
+    str lr, [sp, #32]
+    bl JITStubThunked_has_property
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_push_scope(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_push_scope(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_push_scope
+    str lr, [sp, #32]
+    bl JITStubThunked_op_push_scope
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_pop_scope(STUB_ARGS_DECLARATION);
+__asm void cti_op_pop_scope(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_pop_scope
+    str lr, [sp, #32]
+    bl JITStubThunked_op_pop_scope
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_typeof(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_typeof(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_typeof
+    str lr, [sp, #32]
+    bl JITStubThunked_op_typeof
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_is_undefined(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_is_undefined(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_is_undefined
+    str lr, [sp, #32]
+    bl JITStubThunked_op_is_undefined
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_is_boolean(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_is_boolean(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_is_boolean
+    str lr, [sp, #32]
+    bl JITStubThunked_op_is_boolean
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_is_number(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_is_number(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_is_number
+    str lr, [sp, #32]
+    bl JITStubThunked_op_is_number
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_is_string(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_is_string(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_is_string
+    str lr, [sp, #32]
+    bl JITStubThunked_op_is_string
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_is_object(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_is_object(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_is_object
+    str lr, [sp, #32]
+    bl JITStubThunked_op_is_object
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_is_function(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_is_function(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_is_function
+    str lr, [sp, #32]
+    bl JITStubThunked_op_is_function
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_stricteq(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_stricteq(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_stricteq
+    str lr, [sp, #32]
+    bl JITStubThunked_op_stricteq
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_to_primitive(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_to_primitive(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_to_primitive
+    str lr, [sp, #32]
+    bl JITStubThunked_op_to_primitive
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_strcat(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_strcat(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_strcat
+    str lr, [sp, #32]
+    bl JITStubThunked_op_strcat
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_nstricteq(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_nstricteq(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_nstricteq
+    str lr, [sp, #32]
+    bl JITStubThunked_op_nstricteq
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_to_jsnumber(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_to_jsnumber(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_to_jsnumber
+    str lr, [sp, #32]
+    bl JITStubThunked_op_to_jsnumber
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_in(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_in(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_in
+    str lr, [sp, #32]
+    bl JITStubThunked_op_in
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_push_new_scope(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_push_new_scope(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_push_new_scope
+    str lr, [sp, #32]
+    bl JITStubThunked_op_push_new_scope
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_jmp_scopes(STUB_ARGS_DECLARATION);
+__asm void cti_op_jmp_scopes(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_jmp_scopes
+    str lr, [sp, #32]
+    bl JITStubThunked_op_jmp_scopes
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_by_index(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_by_index(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_by_index
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_by_index
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void* JITStubThunked_op_switch_imm(STUB_ARGS_DECLARATION);
+__asm void* cti_op_switch_imm(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_switch_imm
+    str lr, [sp, #32]
+    bl JITStubThunked_op_switch_imm
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void* JITStubThunked_op_switch_char(STUB_ARGS_DECLARATION);
+__asm void* cti_op_switch_char(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_switch_char
+    str lr, [sp, #32]
+    bl JITStubThunked_op_switch_char
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void* JITStubThunked_op_switch_string(STUB_ARGS_DECLARATION);
+__asm void* cti_op_switch_string(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_switch_string
+    str lr, [sp, #32]
+    bl JITStubThunked_op_switch_string
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_op_del_by_val(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_op_del_by_val(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_del_by_val
+    str lr, [sp, #32]
+    bl JITStubThunked_op_del_by_val
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_getter(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_getter(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_getter
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_getter
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_put_setter(STUB_ARGS_DECLARATION);
+__asm void cti_op_put_setter(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_put_setter
+    str lr, [sp, #32]
+    bl JITStubThunked_op_put_setter
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" JSObject* JITStubThunked_op_new_error(STUB_ARGS_DECLARATION);
+__asm JSObject* cti_op_new_error(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_new_error
+    str lr, [sp, #32]
+    bl JITStubThunked_op_new_error
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_debug(STUB_ARGS_DECLARATION);
+__asm void cti_op_debug(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_debug
+    str lr, [sp, #32]
+    bl JITStubThunked_op_debug
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_debug_catch(STUB_ARGS_DECLARATION);
+__asm void cti_op_debug_catch(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_debug_catch
+    str lr, [sp, #32]
+    bl JITStubThunked_op_debug_catch
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" void JITStubThunked_op_debug_return(STUB_ARGS_DECLARATION);
+__asm void cti_op_debug_return(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_op_debug_return
+    str lr, [sp, #32]
+    bl JITStubThunked_op_debug_return
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_vm_throw(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_vm_throw(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_vm_throw
+    str lr, [sp, #32]
+    bl JITStubThunked_vm_throw
+    ldr lr, [sp, #32]
+    bx lr
+}
+
+extern "C" EncodedJSValue JITStubThunked_to_object(STUB_ARGS_DECLARATION);
+__asm EncodedJSValue cti_to_object(STUB_ARGS_DECLARATION)
+{
+    ARM
+    IMPORT JITStubThunked_to_object
+    str lr, [sp, #32]
+    bl JITStubThunked_to_object
+    ldr lr, [sp, #32]
+    bx lr
+}
+
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.cpp
index f1fa708..6ac1b9b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.cpp
@@ -208,7 +208,7 @@
 
 
 /* Copy the first part of user declarations.  */
-#line 3 "../parser/Grammar.y"
+#line 3 "parser/Grammar.y"
 
 
 /*
@@ -236,6 +236,7 @@
 
 #include "JSObject.h"
 #include "JSString.h"
+#include "Lexer.h"
 #include "NodeConstructors.h"
 #include "NodeInfo.h"
 #include <stdlib.h>
@@ -251,13 +252,12 @@
 // Default values for bison.
 #define YYDEBUG 0 // Set to 1 to debug a parse error.
 #define jscyydebug 0 // Set to 1 to debug a parse error.
-#if !PLATFORM(DARWIN)
+#if !OS(DARWIN)
 // Avoid triggering warnings in older bison by not setting this on the Darwin platform.
 // FIXME: Is this still needed?
 #define YYERROR_VERBOSE
 #endif
 
-int jscyylex(void* lvalp, void* llocp, void* globalPtr);
 int jscyyerror(const char*);
 
 static inline bool allowAutomaticSemicolon(JSC::Lexer&, int);
@@ -372,7 +372,7 @@ static inline void appendToVarDeclarationList(JSGlobalData* globalData, ParserAr
 
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 typedef union YYSTYPE
-#line 146 "../parser/Grammar.y"
+#line 146 "parser/Grammar.y"
 {
     int                 intValue;
     double              doubleValue;
@@ -405,7 +405,7 @@ typedef union YYSTYPE
     Operator            op;
 }
 /* Line 187 of yacc.c.  */
-#line 409 "JavaScriptCore/tmp/../generated/Grammar.tab.c"
+#line 409 "generated/Grammar.tab.c"
 	YYSTYPE;
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
@@ -427,12 +427,12 @@ typedef struct YYLTYPE
 
 
 /* Copy the second part of user declarations.  */
-#line 178 "../parser/Grammar.y"
+#line 178 "parser/Grammar.y"
 
 
 template <typename T> inline void setStatementLocation(StatementNode* statement, const T& start, const T& end)
 {
-    statement->setLoc(start.first_line, end.last_line, start.first_column);
+    statement->setLoc(start.first_line, end.last_line);
 }
 
 static inline void setExceptionLocation(ThrowableExpressionData* node, unsigned start, unsigned divot, unsigned end)
@@ -443,7 +443,7 @@ static inline void setExceptionLocation(ThrowableExpressionData* node, unsigned
 
 
 /* Line 216 of yacc.c.  */
-#line 447 "JavaScriptCore/tmp/../generated/Grammar.tab.c"
+#line 447 "generated/Grammar.tab.c"
 
 #ifdef short
 # undef short
@@ -3010,32 +3010,32 @@ yyreduce:
   switch (yyn)
     {
         case 2:
-#line 293 "../parser/Grammar.y"
+#line 293 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) NullNode(GLOBAL_DATA), 0, 1); ;}
     break;
 
   case 3:
-#line 294 "../parser/Grammar.y"
+#line 294 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BooleanNode(GLOBAL_DATA, true), 0, 1); ;}
     break;
 
   case 4:
-#line 295 "../parser/Grammar.y"
+#line 295 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BooleanNode(GLOBAL_DATA, false), 0, 1); ;}
     break;
 
   case 5:
-#line 296 "../parser/Grammar.y"
+#line 296 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeNumberNode(GLOBAL_DATA, (yyvsp[(1) - (1)].doubleValue)), 0, 1); ;}
     break;
 
   case 6:
-#line 297 "../parser/Grammar.y"
+#line 297 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) StringNode(GLOBAL_DATA, *(yyvsp[(1) - (1)].ident)), 0, 1); ;}
     break;
 
   case 7:
-#line 298 "../parser/Grammar.y"
+#line 298 "parser/Grammar.y"
     {
                                             Lexer& l = *GLOBAL_DATA->lexer;
                                             const Identifier* pattern;
@@ -3050,7 +3050,7 @@ yyreduce:
     break;
 
   case 8:
-#line 309 "../parser/Grammar.y"
+#line 309 "parser/Grammar.y"
     {
                                             Lexer& l = *GLOBAL_DATA->lexer;
                                             const Identifier* pattern;
@@ -3065,27 +3065,27 @@ yyreduce:
     break;
 
   case 9:
-#line 323 "../parser/Grammar.y"
+#line 323 "parser/Grammar.y"
     { (yyval.propertyNode) = createNodeInfo<PropertyNode*>(new (GLOBAL_DATA) PropertyNode(GLOBAL_DATA, *(yyvsp[(1) - (3)].ident), (yyvsp[(3) - (3)].expressionNode).m_node, PropertyNode::Constant), (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 10:
-#line 324 "../parser/Grammar.y"
+#line 324 "parser/Grammar.y"
     { (yyval.propertyNode) = createNodeInfo<PropertyNode*>(new (GLOBAL_DATA) PropertyNode(GLOBAL_DATA, *(yyvsp[(1) - (3)].ident), (yyvsp[(3) - (3)].expressionNode).m_node, PropertyNode::Constant), (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 11:
-#line 325 "../parser/Grammar.y"
+#line 325 "parser/Grammar.y"
     { (yyval.propertyNode) = createNodeInfo<PropertyNode*>(new (GLOBAL_DATA) PropertyNode(GLOBAL_DATA, (yyvsp[(1) - (3)].doubleValue), (yyvsp[(3) - (3)].expressionNode).m_node, PropertyNode::Constant), (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 12:
-#line 326 "../parser/Grammar.y"
+#line 326 "parser/Grammar.y"
     { (yyval.propertyNode) = createNodeInfo<PropertyNode*>(makeGetterOrSetterPropertyNode(GLOBAL_DATA, *(yyvsp[(1) - (7)].ident), *(yyvsp[(2) - (7)].ident), 0, (yyvsp[(6) - (7)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(5) - (7)].intValue), (yyvsp[(7) - (7)].intValue), (yylsp[(5) - (7)]).first_line)), ClosureFeature, 0); setStatementLocation((yyvsp[(6) - (7)].functionBodyNode), (yylsp[(5) - (7)]), (yylsp[(7) - (7)])); if (!(yyval.propertyNode).m_node) YYABORT; ;}
     break;
 
   case 13:
-#line 328 "../parser/Grammar.y"
+#line 328 "parser/Grammar.y"
     {
                                                                  (yyval.propertyNode) = createNodeInfo<PropertyNode*>(makeGetterOrSetterPropertyNode(GLOBAL_DATA, *(yyvsp[(1) - (8)].ident), *(yyvsp[(2) - (8)].ident), (yyvsp[(4) - (8)].parameterList).m_node.head, (yyvsp[(7) - (8)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(6) - (8)].intValue), (yyvsp[(8) - (8)].intValue), (yylsp[(6) - (8)]).first_line)), (yyvsp[(4) - (8)].parameterList).m_features | ClosureFeature, 0); 
                                                                  if ((yyvsp[(4) - (8)].parameterList).m_features & ArgumentsFeature)
@@ -3097,7 +3097,7 @@ yyreduce:
     break;
 
   case 14:
-#line 339 "../parser/Grammar.y"
+#line 339 "parser/Grammar.y"
     { (yyval.propertyList).m_node.head = new (GLOBAL_DATA) PropertyListNode(GLOBAL_DATA, (yyvsp[(1) - (1)].propertyNode).m_node); 
                                           (yyval.propertyList).m_node.tail = (yyval.propertyList).m_node.head;
                                           (yyval.propertyList).m_features = (yyvsp[(1) - (1)].propertyNode).m_features;
@@ -3105,7 +3105,7 @@ yyreduce:
     break;
 
   case 15:
-#line 343 "../parser/Grammar.y"
+#line 343 "parser/Grammar.y"
     { (yyval.propertyList).m_node.head = (yyvsp[(1) - (3)].propertyList).m_node.head;
                                           (yyval.propertyList).m_node.tail = new (GLOBAL_DATA) PropertyListNode(GLOBAL_DATA, (yyvsp[(3) - (3)].propertyNode).m_node, (yyvsp[(1) - (3)].propertyList).m_node.tail);
                                           (yyval.propertyList).m_features = (yyvsp[(1) - (3)].propertyList).m_features | (yyvsp[(3) - (3)].propertyNode).m_features;
@@ -3113,52 +3113,52 @@ yyreduce:
     break;
 
   case 17:
-#line 351 "../parser/Grammar.y"
+#line 351 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ObjectLiteralNode(GLOBAL_DATA), 0, 0); ;}
     break;
 
   case 18:
-#line 352 "../parser/Grammar.y"
+#line 352 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ObjectLiteralNode(GLOBAL_DATA, (yyvsp[(2) - (3)].propertyList).m_node.head), (yyvsp[(2) - (3)].propertyList).m_features, (yyvsp[(2) - (3)].propertyList).m_numConstants); ;}
     break;
 
   case 19:
-#line 354 "../parser/Grammar.y"
+#line 354 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ObjectLiteralNode(GLOBAL_DATA, (yyvsp[(2) - (4)].propertyList).m_node.head), (yyvsp[(2) - (4)].propertyList).m_features, (yyvsp[(2) - (4)].propertyList).m_numConstants); ;}
     break;
 
   case 20:
-#line 358 "../parser/Grammar.y"
+#line 358 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ThisNode(GLOBAL_DATA), ThisFeature, 0); ;}
     break;
 
   case 23:
-#line 361 "../parser/Grammar.y"
+#line 361 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ResolveNode(GLOBAL_DATA, *(yyvsp[(1) - (1)].ident), (yylsp[(1) - (1)]).first_column), (*(yyvsp[(1) - (1)].ident) == GLOBAL_DATA->propertyNames->arguments) ? ArgumentsFeature : 0, 0); ;}
     break;
 
   case 24:
-#line 362 "../parser/Grammar.y"
+#line 362 "parser/Grammar.y"
     { (yyval.expressionNode) = (yyvsp[(2) - (3)].expressionNode); ;}
     break;
 
   case 25:
-#line 366 "../parser/Grammar.y"
+#line 366 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ArrayNode(GLOBAL_DATA, (yyvsp[(2) - (3)].intValue)), 0, (yyvsp[(2) - (3)].intValue) ? 1 : 0); ;}
     break;
 
   case 26:
-#line 367 "../parser/Grammar.y"
+#line 367 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ArrayNode(GLOBAL_DATA, (yyvsp[(2) - (3)].elementList).m_node.head), (yyvsp[(2) - (3)].elementList).m_features, (yyvsp[(2) - (3)].elementList).m_numConstants); ;}
     break;
 
   case 27:
-#line 368 "../parser/Grammar.y"
+#line 368 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ArrayNode(GLOBAL_DATA, (yyvsp[(4) - (5)].intValue), (yyvsp[(2) - (5)].elementList).m_node.head), (yyvsp[(2) - (5)].elementList).m_features, (yyvsp[(4) - (5)].intValue) ? (yyvsp[(2) - (5)].elementList).m_numConstants + 1 : (yyvsp[(2) - (5)].elementList).m_numConstants); ;}
     break;
 
   case 28:
-#line 372 "../parser/Grammar.y"
+#line 372 "parser/Grammar.y"
     { (yyval.elementList).m_node.head = new (GLOBAL_DATA) ElementNode(GLOBAL_DATA, (yyvsp[(1) - (2)].intValue), (yyvsp[(2) - (2)].expressionNode).m_node);
                                           (yyval.elementList).m_node.tail = (yyval.elementList).m_node.head;
                                           (yyval.elementList).m_features = (yyvsp[(2) - (2)].expressionNode).m_features;
@@ -3166,7 +3166,7 @@ yyreduce:
     break;
 
   case 29:
-#line 377 "../parser/Grammar.y"
+#line 377 "parser/Grammar.y"
     { (yyval.elementList).m_node.head = (yyvsp[(1) - (4)].elementList).m_node.head;
                                           (yyval.elementList).m_node.tail = new (GLOBAL_DATA) ElementNode(GLOBAL_DATA, (yyvsp[(1) - (4)].elementList).m_node.tail, (yyvsp[(3) - (4)].intValue), (yyvsp[(4) - (4)].expressionNode).m_node);
                                           (yyval.elementList).m_features = (yyvsp[(1) - (4)].elementList).m_features | (yyvsp[(4) - (4)].expressionNode).m_features;
@@ -3174,27 +3174,27 @@ yyreduce:
     break;
 
   case 30:
-#line 384 "../parser/Grammar.y"
+#line 384 "parser/Grammar.y"
     { (yyval.intValue) = 0; ;}
     break;
 
   case 32:
-#line 389 "../parser/Grammar.y"
+#line 389 "parser/Grammar.y"
     { (yyval.intValue) = 1; ;}
     break;
 
   case 33:
-#line 390 "../parser/Grammar.y"
+#line 390 "parser/Grammar.y"
     { (yyval.intValue) = (yyvsp[(1) - (2)].intValue) + 1; ;}
     break;
 
   case 35:
-#line 395 "../parser/Grammar.y"
+#line 395 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>((yyvsp[(1) - (1)].funcExprNode).m_node, (yyvsp[(1) - (1)].funcExprNode).m_features, (yyvsp[(1) - (1)].funcExprNode).m_numConstants); ;}
     break;
 
   case 36:
-#line 396 "../parser/Grammar.y"
+#line 396 "parser/Grammar.y"
     { BracketAccessorNode* node = new (GLOBAL_DATA) BracketAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (4)]).first_column, (yylsp[(1) - (4)]).last_column, (yylsp[(4) - (4)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (4)].expressionNode).m_features | (yyvsp[(3) - (4)].expressionNode).m_features, (yyvsp[(1) - (4)].expressionNode).m_numConstants + (yyvsp[(3) - (4)].expressionNode).m_numConstants); 
@@ -3202,7 +3202,7 @@ yyreduce:
     break;
 
   case 37:
-#line 400 "../parser/Grammar.y"
+#line 400 "parser/Grammar.y"
     { DotAccessorNode* node = new (GLOBAL_DATA) DotAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, *(yyvsp[(3) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(1) - (3)]).last_column, (yylsp[(3) - (3)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants);
@@ -3210,7 +3210,7 @@ yyreduce:
     break;
 
   case 38:
-#line 404 "../parser/Grammar.y"
+#line 404 "parser/Grammar.y"
     { NewExprNode* node = new (GLOBAL_DATA) NewExprNode(GLOBAL_DATA, (yyvsp[(2) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].argumentsNode).m_node);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(3) - (3)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(2) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].argumentsNode).m_features, (yyvsp[(2) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].argumentsNode).m_numConstants);
@@ -3218,7 +3218,7 @@ yyreduce:
     break;
 
   case 40:
-#line 412 "../parser/Grammar.y"
+#line 412 "parser/Grammar.y"
     { BracketAccessorNode* node = new (GLOBAL_DATA) BracketAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (4)]).first_column, (yylsp[(1) - (4)]).last_column, (yylsp[(4) - (4)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (4)].expressionNode).m_features | (yyvsp[(3) - (4)].expressionNode).m_features, (yyvsp[(1) - (4)].expressionNode).m_numConstants + (yyvsp[(3) - (4)].expressionNode).m_numConstants); 
@@ -3226,7 +3226,7 @@ yyreduce:
     break;
 
   case 41:
-#line 416 "../parser/Grammar.y"
+#line 416 "parser/Grammar.y"
     { DotAccessorNode* node = new (GLOBAL_DATA) DotAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, *(yyvsp[(3) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(1) - (3)]).last_column, (yylsp[(3) - (3)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants);
@@ -3234,7 +3234,7 @@ yyreduce:
     break;
 
   case 42:
-#line 420 "../parser/Grammar.y"
+#line 420 "parser/Grammar.y"
     { NewExprNode* node = new (GLOBAL_DATA) NewExprNode(GLOBAL_DATA, (yyvsp[(2) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].argumentsNode).m_node);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(3) - (3)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(2) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].argumentsNode).m_features, (yyvsp[(2) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].argumentsNode).m_numConstants);
@@ -3242,7 +3242,7 @@ yyreduce:
     break;
 
   case 44:
-#line 428 "../parser/Grammar.y"
+#line 428 "parser/Grammar.y"
     { NewExprNode* node = new (GLOBAL_DATA) NewExprNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).last_column, (yylsp[(2) - (2)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); 
@@ -3250,7 +3250,7 @@ yyreduce:
     break;
 
   case 46:
-#line 436 "../parser/Grammar.y"
+#line 436 "parser/Grammar.y"
     { NewExprNode* node = new (GLOBAL_DATA) NewExprNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).last_column, (yylsp[(2) - (2)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants);
@@ -3258,17 +3258,17 @@ yyreduce:
     break;
 
   case 47:
-#line 443 "../parser/Grammar.y"
+#line 443 "parser/Grammar.y"
     { (yyval.expressionNode) = makeFunctionCallNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode), (yyvsp[(2) - (2)].argumentsNode), (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column); ;}
     break;
 
   case 48:
-#line 444 "../parser/Grammar.y"
+#line 444 "parser/Grammar.y"
     { (yyval.expressionNode) = makeFunctionCallNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode), (yyvsp[(2) - (2)].argumentsNode), (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column); ;}
     break;
 
   case 49:
-#line 445 "../parser/Grammar.y"
+#line 445 "parser/Grammar.y"
     { BracketAccessorNode* node = new (GLOBAL_DATA) BracketAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (4)]).first_column, (yylsp[(1) - (4)]).last_column, (yylsp[(4) - (4)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (4)].expressionNode).m_features | (yyvsp[(3) - (4)].expressionNode).m_features, (yyvsp[(1) - (4)].expressionNode).m_numConstants + (yyvsp[(3) - (4)].expressionNode).m_numConstants); 
@@ -3276,24 +3276,24 @@ yyreduce:
     break;
 
   case 50:
-#line 449 "../parser/Grammar.y"
+#line 449 "parser/Grammar.y"
     { DotAccessorNode* node = new (GLOBAL_DATA) DotAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, *(yyvsp[(3) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(1) - (3)]).last_column, (yylsp[(3) - (3)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 51:
-#line 455 "../parser/Grammar.y"
+#line 455 "parser/Grammar.y"
     { (yyval.expressionNode) = makeFunctionCallNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode), (yyvsp[(2) - (2)].argumentsNode), (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column); ;}
     break;
 
   case 52:
-#line 456 "../parser/Grammar.y"
+#line 456 "parser/Grammar.y"
     { (yyval.expressionNode) = makeFunctionCallNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode), (yyvsp[(2) - (2)].argumentsNode), (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column); ;}
     break;
 
   case 53:
-#line 457 "../parser/Grammar.y"
+#line 457 "parser/Grammar.y"
     { BracketAccessorNode* node = new (GLOBAL_DATA) BracketAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_node, (yyvsp[(3) - (4)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (4)]).first_column, (yylsp[(1) - (4)]).last_column, (yylsp[(4) - (4)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (4)].expressionNode).m_features | (yyvsp[(3) - (4)].expressionNode).m_features, (yyvsp[(1) - (4)].expressionNode).m_numConstants + (yyvsp[(3) - (4)].expressionNode).m_numConstants); 
@@ -3301,7 +3301,7 @@ yyreduce:
     break;
 
   case 54:
-#line 461 "../parser/Grammar.y"
+#line 461 "parser/Grammar.y"
     { DotAccessorNode* node = new (GLOBAL_DATA) DotAccessorNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, *(yyvsp[(3) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(1) - (3)]).last_column, (yylsp[(3) - (3)]).last_column);
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants); 
@@ -3309,17 +3309,17 @@ yyreduce:
     break;
 
   case 55:
-#line 468 "../parser/Grammar.y"
+#line 468 "parser/Grammar.y"
     { (yyval.argumentsNode) = createNodeInfo<ArgumentsNode*>(new (GLOBAL_DATA) ArgumentsNode(GLOBAL_DATA), 0, 0); ;}
     break;
 
   case 56:
-#line 469 "../parser/Grammar.y"
+#line 469 "parser/Grammar.y"
     { (yyval.argumentsNode) = createNodeInfo<ArgumentsNode*>(new (GLOBAL_DATA) ArgumentsNode(GLOBAL_DATA, (yyvsp[(2) - (3)].argumentList).m_node.head), (yyvsp[(2) - (3)].argumentList).m_features, (yyvsp[(2) - (3)].argumentList).m_numConstants); ;}
     break;
 
   case 57:
-#line 473 "../parser/Grammar.y"
+#line 473 "parser/Grammar.y"
     { (yyval.argumentList).m_node.head = new (GLOBAL_DATA) ArgumentListNode(GLOBAL_DATA, (yyvsp[(1) - (1)].expressionNode).m_node);
                                           (yyval.argumentList).m_node.tail = (yyval.argumentList).m_node.head;
                                           (yyval.argumentList).m_features = (yyvsp[(1) - (1)].expressionNode).m_features;
@@ -3327,7 +3327,7 @@ yyreduce:
     break;
 
   case 58:
-#line 477 "../parser/Grammar.y"
+#line 477 "parser/Grammar.y"
     { (yyval.argumentList).m_node.head = (yyvsp[(1) - (3)].argumentList).m_node.head;
                                           (yyval.argumentList).m_node.tail = new (GLOBAL_DATA) ArgumentListNode(GLOBAL_DATA, (yyvsp[(1) - (3)].argumentList).m_node.tail, (yyvsp[(3) - (3)].expressionNode).m_node);
                                           (yyval.argumentList).m_features = (yyvsp[(1) - (3)].argumentList).m_features | (yyvsp[(3) - (3)].expressionNode).m_features;
@@ -3335,528 +3335,528 @@ yyreduce:
     break;
 
   case 64:
-#line 495 "../parser/Grammar.y"
+#line 495 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePostfixNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode).m_node, OpPlusPlus, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column), (yyvsp[(1) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(1) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 65:
-#line 496 "../parser/Grammar.y"
+#line 496 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePostfixNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode).m_node, OpMinusMinus, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column), (yyvsp[(1) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(1) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 67:
-#line 501 "../parser/Grammar.y"
+#line 501 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePostfixNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode).m_node, OpPlusPlus, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column), (yyvsp[(1) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(1) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 68:
-#line 502 "../parser/Grammar.y"
+#line 502 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePostfixNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode).m_node, OpMinusMinus, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(2) - (2)]).last_column), (yyvsp[(1) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(1) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 69:
-#line 506 "../parser/Grammar.y"
+#line 506 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeDeleteNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).last_column, (yylsp[(2) - (2)]).last_column), (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 70:
-#line 507 "../parser/Grammar.y"
+#line 507 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) VoidNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node), (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants + 1); ;}
     break;
 
   case 71:
-#line 508 "../parser/Grammar.y"
+#line 508 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeTypeOfNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node), (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 72:
-#line 509 "../parser/Grammar.y"
+#line 509 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePrefixNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node, OpPlusPlus, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).first_column + 1, (yylsp[(2) - (2)]).last_column), (yyvsp[(2) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 73:
-#line 510 "../parser/Grammar.y"
+#line 510 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePrefixNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node, OpPlusPlus, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).first_column + 1, (yylsp[(2) - (2)]).last_column), (yyvsp[(2) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 74:
-#line 511 "../parser/Grammar.y"
+#line 511 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePrefixNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node, OpMinusMinus, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).first_column + 1, (yylsp[(2) - (2)]).last_column), (yyvsp[(2) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 75:
-#line 512 "../parser/Grammar.y"
+#line 512 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makePrefixNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node, OpMinusMinus, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).first_column + 1, (yylsp[(2) - (2)]).last_column), (yyvsp[(2) - (2)].expressionNode).m_features | AssignFeature, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 76:
-#line 513 "../parser/Grammar.y"
+#line 513 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) UnaryPlusNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node), (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 77:
-#line 514 "../parser/Grammar.y"
+#line 514 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeNegateNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node), (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 78:
-#line 515 "../parser/Grammar.y"
+#line 515 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeBitwiseNotNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node), (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 79:
-#line 516 "../parser/Grammar.y"
+#line 516 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LogicalNotNode(GLOBAL_DATA, (yyvsp[(2) - (2)].expressionNode).m_node), (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 85:
-#line 530 "../parser/Grammar.y"
+#line 530 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeMultNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 86:
-#line 531 "../parser/Grammar.y"
+#line 531 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeDivNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 87:
-#line 532 "../parser/Grammar.y"
+#line 532 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ModNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 89:
-#line 538 "../parser/Grammar.y"
+#line 538 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeMultNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 90:
-#line 540 "../parser/Grammar.y"
+#line 540 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeDivNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 91:
-#line 542 "../parser/Grammar.y"
+#line 542 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ModNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 93:
-#line 547 "../parser/Grammar.y"
+#line 547 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeAddNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 94:
-#line 548 "../parser/Grammar.y"
+#line 548 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeSubNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 96:
-#line 554 "../parser/Grammar.y"
+#line 554 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeAddNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 97:
-#line 556 "../parser/Grammar.y"
+#line 556 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeSubNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 99:
-#line 561 "../parser/Grammar.y"
+#line 561 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeLeftShiftNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 100:
-#line 562 "../parser/Grammar.y"
+#line 562 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeRightShiftNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 101:
-#line 563 "../parser/Grammar.y"
+#line 563 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) UnsignedRightShiftNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 103:
-#line 568 "../parser/Grammar.y"
+#line 568 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeLeftShiftNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 104:
-#line 569 "../parser/Grammar.y"
+#line 569 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeRightShiftNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 105:
-#line 570 "../parser/Grammar.y"
+#line 570 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) UnsignedRightShiftNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 107:
-#line 575 "../parser/Grammar.y"
+#line 575 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LessNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 108:
-#line 576 "../parser/Grammar.y"
+#line 576 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) GreaterNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 109:
-#line 577 "../parser/Grammar.y"
+#line 577 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LessEqNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 110:
-#line 578 "../parser/Grammar.y"
+#line 578 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) GreaterEqNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 111:
-#line 579 "../parser/Grammar.y"
+#line 579 "parser/Grammar.y"
     { InstanceOfNode* node = new (GLOBAL_DATA) InstanceOfNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(3) - (3)]).first_column, (yylsp[(3) - (3)]).last_column);  
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 112:
-#line 582 "../parser/Grammar.y"
+#line 582 "parser/Grammar.y"
     { InNode* node = new (GLOBAL_DATA) InNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(3) - (3)]).first_column, (yylsp[(3) - (3)]).last_column);  
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 114:
-#line 589 "../parser/Grammar.y"
+#line 589 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LessNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 115:
-#line 590 "../parser/Grammar.y"
+#line 590 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) GreaterNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 116:
-#line 591 "../parser/Grammar.y"
+#line 591 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LessEqNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 117:
-#line 592 "../parser/Grammar.y"
+#line 592 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) GreaterEqNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 118:
-#line 594 "../parser/Grammar.y"
+#line 594 "parser/Grammar.y"
     { InstanceOfNode* node = new (GLOBAL_DATA) InstanceOfNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(3) - (3)]).first_column, (yylsp[(3) - (3)]).last_column);  
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 120:
-#line 601 "../parser/Grammar.y"
+#line 601 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LessNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 121:
-#line 602 "../parser/Grammar.y"
+#line 602 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) GreaterNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 122:
-#line 603 "../parser/Grammar.y"
+#line 603 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LessEqNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 123:
-#line 604 "../parser/Grammar.y"
+#line 604 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) GreaterEqNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 124:
-#line 606 "../parser/Grammar.y"
+#line 606 "parser/Grammar.y"
     { InstanceOfNode* node = new (GLOBAL_DATA) InstanceOfNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(3) - (3)]).first_column, (yylsp[(3) - (3)]).last_column);  
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 125:
-#line 610 "../parser/Grammar.y"
+#line 610 "parser/Grammar.y"
     { InNode* node = new (GLOBAL_DATA) InNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(3) - (3)]).first_column, (yylsp[(3) - (3)]).last_column);  
                                           (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(node, (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 127:
-#line 617 "../parser/Grammar.y"
+#line 617 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) EqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 128:
-#line 618 "../parser/Grammar.y"
+#line 618 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) NotEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 129:
-#line 619 "../parser/Grammar.y"
+#line 619 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) StrictEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 130:
-#line 620 "../parser/Grammar.y"
+#line 620 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) NotStrictEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 132:
-#line 626 "../parser/Grammar.y"
+#line 626 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) EqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 133:
-#line 628 "../parser/Grammar.y"
+#line 628 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) NotEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 134:
-#line 630 "../parser/Grammar.y"
+#line 630 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) StrictEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 135:
-#line 632 "../parser/Grammar.y"
+#line 632 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) NotStrictEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 137:
-#line 638 "../parser/Grammar.y"
+#line 638 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) EqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 138:
-#line 639 "../parser/Grammar.y"
+#line 639 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) NotEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 139:
-#line 641 "../parser/Grammar.y"
+#line 641 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) StrictEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 140:
-#line 643 "../parser/Grammar.y"
+#line 643 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) NotStrictEqualNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 142:
-#line 648 "../parser/Grammar.y"
+#line 648 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitAndNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 144:
-#line 654 "../parser/Grammar.y"
+#line 654 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitAndNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 146:
-#line 659 "../parser/Grammar.y"
+#line 659 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitAndNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 148:
-#line 664 "../parser/Grammar.y"
+#line 664 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitXOrNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 150:
-#line 670 "../parser/Grammar.y"
+#line 670 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitXOrNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 152:
-#line 676 "../parser/Grammar.y"
+#line 676 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitXOrNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 154:
-#line 681 "../parser/Grammar.y"
+#line 681 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitOrNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 156:
-#line 687 "../parser/Grammar.y"
+#line 687 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitOrNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 158:
-#line 693 "../parser/Grammar.y"
+#line 693 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) BitOrNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 160:
-#line 698 "../parser/Grammar.y"
+#line 698 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LogicalOpNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, OpLogicalAnd), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 162:
-#line 704 "../parser/Grammar.y"
+#line 704 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LogicalOpNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, OpLogicalAnd), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 164:
-#line 710 "../parser/Grammar.y"
+#line 710 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LogicalOpNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, OpLogicalAnd), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 166:
-#line 715 "../parser/Grammar.y"
+#line 715 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LogicalOpNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, OpLogicalOr), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 168:
-#line 721 "../parser/Grammar.y"
+#line 721 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LogicalOpNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, OpLogicalOr), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 170:
-#line 726 "../parser/Grammar.y"
+#line 726 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) LogicalOpNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node, OpLogicalOr), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 172:
-#line 732 "../parser/Grammar.y"
+#line 732 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ConditionalNode(GLOBAL_DATA, (yyvsp[(1) - (5)].expressionNode).m_node, (yyvsp[(3) - (5)].expressionNode).m_node, (yyvsp[(5) - (5)].expressionNode).m_node), (yyvsp[(1) - (5)].expressionNode).m_features | (yyvsp[(3) - (5)].expressionNode).m_features | (yyvsp[(5) - (5)].expressionNode).m_features, (yyvsp[(1) - (5)].expressionNode).m_numConstants + (yyvsp[(3) - (5)].expressionNode).m_numConstants + (yyvsp[(5) - (5)].expressionNode).m_numConstants); ;}
     break;
 
   case 174:
-#line 738 "../parser/Grammar.y"
+#line 738 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ConditionalNode(GLOBAL_DATA, (yyvsp[(1) - (5)].expressionNode).m_node, (yyvsp[(3) - (5)].expressionNode).m_node, (yyvsp[(5) - (5)].expressionNode).m_node), (yyvsp[(1) - (5)].expressionNode).m_features | (yyvsp[(3) - (5)].expressionNode).m_features | (yyvsp[(5) - (5)].expressionNode).m_features, (yyvsp[(1) - (5)].expressionNode).m_numConstants + (yyvsp[(3) - (5)].expressionNode).m_numConstants + (yyvsp[(5) - (5)].expressionNode).m_numConstants); ;}
     break;
 
   case 176:
-#line 744 "../parser/Grammar.y"
+#line 744 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(new (GLOBAL_DATA) ConditionalNode(GLOBAL_DATA, (yyvsp[(1) - (5)].expressionNode).m_node, (yyvsp[(3) - (5)].expressionNode).m_node, (yyvsp[(5) - (5)].expressionNode).m_node), (yyvsp[(1) - (5)].expressionNode).m_features | (yyvsp[(3) - (5)].expressionNode).m_features | (yyvsp[(5) - (5)].expressionNode).m_features, (yyvsp[(1) - (5)].expressionNode).m_numConstants + (yyvsp[(3) - (5)].expressionNode).m_numConstants + (yyvsp[(5) - (5)].expressionNode).m_numConstants); ;}
     break;
 
   case 178:
-#line 750 "../parser/Grammar.y"
+#line 750 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeAssignNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(2) - (3)].op), (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(1) - (3)].expressionNode).m_features & AssignFeature, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature, 
                                                                                                      (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).first_column + 1, (yylsp[(3) - (3)]).last_column), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features | AssignFeature, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); 
                                         ;}
     break;
 
   case 180:
-#line 758 "../parser/Grammar.y"
+#line 758 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeAssignNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(2) - (3)].op), (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(1) - (3)].expressionNode).m_features & AssignFeature, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature, 
                                                                                                      (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).first_column + 1, (yylsp[(3) - (3)]).last_column), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features | AssignFeature, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants);
                                         ;}
     break;
 
   case 182:
-#line 766 "../parser/Grammar.y"
+#line 766 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(makeAssignNode(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(2) - (3)].op), (yyvsp[(3) - (3)].expressionNode).m_node, (yyvsp[(1) - (3)].expressionNode).m_features & AssignFeature, (yyvsp[(3) - (3)].expressionNode).m_features & AssignFeature,
                                                                                                      (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).first_column + 1, (yylsp[(3) - (3)]).last_column), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features | AssignFeature, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); 
                                         ;}
     break;
 
   case 183:
-#line 772 "../parser/Grammar.y"
+#line 772 "parser/Grammar.y"
     { (yyval.op) = OpEqual; ;}
     break;
 
   case 184:
-#line 773 "../parser/Grammar.y"
+#line 773 "parser/Grammar.y"
     { (yyval.op) = OpPlusEq; ;}
     break;
 
   case 185:
-#line 774 "../parser/Grammar.y"
+#line 774 "parser/Grammar.y"
     { (yyval.op) = OpMinusEq; ;}
     break;
 
   case 186:
-#line 775 "../parser/Grammar.y"
+#line 775 "parser/Grammar.y"
     { (yyval.op) = OpMultEq; ;}
     break;
 
   case 187:
-#line 776 "../parser/Grammar.y"
+#line 776 "parser/Grammar.y"
     { (yyval.op) = OpDivEq; ;}
     break;
 
   case 188:
-#line 777 "../parser/Grammar.y"
+#line 777 "parser/Grammar.y"
     { (yyval.op) = OpLShift; ;}
     break;
 
   case 189:
-#line 778 "../parser/Grammar.y"
+#line 778 "parser/Grammar.y"
     { (yyval.op) = OpRShift; ;}
     break;
 
   case 190:
-#line 779 "../parser/Grammar.y"
+#line 779 "parser/Grammar.y"
     { (yyval.op) = OpURShift; ;}
     break;
 
   case 191:
-#line 780 "../parser/Grammar.y"
+#line 780 "parser/Grammar.y"
     { (yyval.op) = OpAndEq; ;}
     break;
 
   case 192:
-#line 781 "../parser/Grammar.y"
+#line 781 "parser/Grammar.y"
     { (yyval.op) = OpXOrEq; ;}
     break;
 
   case 193:
-#line 782 "../parser/Grammar.y"
+#line 782 "parser/Grammar.y"
     { (yyval.op) = OpOrEq; ;}
     break;
 
   case 194:
-#line 783 "../parser/Grammar.y"
+#line 783 "parser/Grammar.y"
     { (yyval.op) = OpModEq; ;}
     break;
 
   case 196:
-#line 788 "../parser/Grammar.y"
+#line 788 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(combineCommaNodes(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 198:
-#line 793 "../parser/Grammar.y"
+#line 793 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(combineCommaNodes(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 200:
-#line 798 "../parser/Grammar.y"
+#line 798 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(combineCommaNodes(GLOBAL_DATA, (yyvsp[(1) - (3)].expressionNode).m_node, (yyvsp[(3) - (3)].expressionNode).m_node), (yyvsp[(1) - (3)].expressionNode).m_features | (yyvsp[(3) - (3)].expressionNode).m_features, (yyvsp[(1) - (3)].expressionNode).m_numConstants + (yyvsp[(3) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 218:
-#line 822 "../parser/Grammar.y"
+#line 822 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) BlockNode(GLOBAL_DATA, 0), 0, 0, 0, 0);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(2) - (2)])); ;}
     break;
 
   case 219:
-#line 824 "../parser/Grammar.y"
+#line 824 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) BlockNode(GLOBAL_DATA, (yyvsp[(2) - (3)].sourceElements).m_node), (yyvsp[(2) - (3)].sourceElements).m_varDeclarations, (yyvsp[(2) - (3)].sourceElements).m_funcDeclarations, (yyvsp[(2) - (3)].sourceElements).m_features, (yyvsp[(2) - (3)].sourceElements).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(3) - (3)])); ;}
     break;
 
   case 220:
-#line 829 "../parser/Grammar.y"
+#line 829 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(makeVarStatementNode(GLOBAL_DATA, (yyvsp[(2) - (3)].varDeclList).m_node), (yyvsp[(2) - (3)].varDeclList).m_varDeclarations, (yyvsp[(2) - (3)].varDeclList).m_funcDeclarations, (yyvsp[(2) - (3)].varDeclList).m_features, (yyvsp[(2) - (3)].varDeclList).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(3) - (3)])); ;}
     break;
 
   case 221:
-#line 831 "../parser/Grammar.y"
+#line 831 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(makeVarStatementNode(GLOBAL_DATA, (yyvsp[(2) - (3)].varDeclList).m_node), (yyvsp[(2) - (3)].varDeclList).m_varDeclarations, (yyvsp[(2) - (3)].varDeclList).m_funcDeclarations, (yyvsp[(2) - (3)].varDeclList).m_features, (yyvsp[(2) - (3)].varDeclList).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(2) - (3)]));
                                           AUTO_SEMICOLON; ;}
     break;
 
   case 222:
-#line 837 "../parser/Grammar.y"
+#line 837 "parser/Grammar.y"
     { (yyval.varDeclList).m_node = 0;
                                           (yyval.varDeclList).m_varDeclarations = new (GLOBAL_DATA) ParserArenaData<DeclarationStacks::VarStack>;
                                           appendToVarDeclarationList(GLOBAL_DATA, (yyval.varDeclList).m_varDeclarations, *(yyvsp[(1) - (1)].ident), 0);
@@ -3867,7 +3867,7 @@ yyreduce:
     break;
 
   case 223:
-#line 844 "../parser/Grammar.y"
+#line 844 "parser/Grammar.y"
     { AssignResolveNode* node = new (GLOBAL_DATA) AssignResolveNode(GLOBAL_DATA, *(yyvsp[(1) - (2)].ident), (yyvsp[(2) - (2)].expressionNode).m_node, (yyvsp[(2) - (2)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).first_column + 1, (yylsp[(2) - (2)]).last_column);
                                           (yyval.varDeclList).m_node = node;
@@ -3880,7 +3880,7 @@ yyreduce:
     break;
 
   case 224:
-#line 854 "../parser/Grammar.y"
+#line 854 "parser/Grammar.y"
     { (yyval.varDeclList).m_node = (yyvsp[(1) - (3)].varDeclList).m_node;
                                           (yyval.varDeclList).m_varDeclarations = (yyvsp[(1) - (3)].varDeclList).m_varDeclarations;
                                           appendToVarDeclarationList(GLOBAL_DATA, (yyval.varDeclList).m_varDeclarations, *(yyvsp[(3) - (3)].ident), 0);
@@ -3891,7 +3891,7 @@ yyreduce:
     break;
 
   case 225:
-#line 862 "../parser/Grammar.y"
+#line 862 "parser/Grammar.y"
     { AssignResolveNode* node = new (GLOBAL_DATA) AssignResolveNode(GLOBAL_DATA, *(yyvsp[(3) - (4)].ident), (yyvsp[(4) - (4)].expressionNode).m_node, (yyvsp[(4) - (4)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(3) - (4)]).first_column, (yylsp[(4) - (4)]).first_column + 1, (yylsp[(4) - (4)]).last_column);
                                           (yyval.varDeclList).m_node = combineCommaNodes(GLOBAL_DATA, (yyvsp[(1) - (4)].varDeclList).m_node, node);
@@ -3904,7 +3904,7 @@ yyreduce:
     break;
 
   case 226:
-#line 874 "../parser/Grammar.y"
+#line 874 "parser/Grammar.y"
     { (yyval.varDeclList).m_node = 0;
                                           (yyval.varDeclList).m_varDeclarations = new (GLOBAL_DATA) ParserArenaData<DeclarationStacks::VarStack>;
                                           appendToVarDeclarationList(GLOBAL_DATA, (yyval.varDeclList).m_varDeclarations, *(yyvsp[(1) - (1)].ident), 0);
@@ -3915,7 +3915,7 @@ yyreduce:
     break;
 
   case 227:
-#line 881 "../parser/Grammar.y"
+#line 881 "parser/Grammar.y"
     { AssignResolveNode* node = new (GLOBAL_DATA) AssignResolveNode(GLOBAL_DATA, *(yyvsp[(1) - (2)].ident), (yyvsp[(2) - (2)].expressionNode).m_node, (yyvsp[(2) - (2)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(2) - (2)]).first_column + 1, (yylsp[(2) - (2)]).last_column);
                                           (yyval.varDeclList).m_node = node;
@@ -3928,7 +3928,7 @@ yyreduce:
     break;
 
   case 228:
-#line 891 "../parser/Grammar.y"
+#line 891 "parser/Grammar.y"
     { (yyval.varDeclList).m_node = (yyvsp[(1) - (3)].varDeclList).m_node;
                                           (yyval.varDeclList).m_varDeclarations = (yyvsp[(1) - (3)].varDeclList).m_varDeclarations;
                                           appendToVarDeclarationList(GLOBAL_DATA, (yyval.varDeclList).m_varDeclarations, *(yyvsp[(3) - (3)].ident), 0);
@@ -3939,7 +3939,7 @@ yyreduce:
     break;
 
   case 229:
-#line 899 "../parser/Grammar.y"
+#line 899 "parser/Grammar.y"
     { AssignResolveNode* node = new (GLOBAL_DATA) AssignResolveNode(GLOBAL_DATA, *(yyvsp[(3) - (4)].ident), (yyvsp[(4) - (4)].expressionNode).m_node, (yyvsp[(4) - (4)].expressionNode).m_features & AssignFeature);
                                           setExceptionLocation(node, (yylsp[(3) - (4)]).first_column, (yylsp[(4) - (4)]).first_column + 1, (yylsp[(4) - (4)]).last_column);
                                           (yyval.varDeclList).m_node = combineCommaNodes(GLOBAL_DATA, (yyvsp[(1) - (4)].varDeclList).m_node, node);
@@ -3952,19 +3952,19 @@ yyreduce:
     break;
 
   case 230:
-#line 911 "../parser/Grammar.y"
+#line 911 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) ConstStatementNode(GLOBAL_DATA, (yyvsp[(2) - (3)].constDeclList).m_node.head), (yyvsp[(2) - (3)].constDeclList).m_varDeclarations, (yyvsp[(2) - (3)].constDeclList).m_funcDeclarations, (yyvsp[(2) - (3)].constDeclList).m_features, (yyvsp[(2) - (3)].constDeclList).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(3) - (3)])); ;}
     break;
 
   case 231:
-#line 914 "../parser/Grammar.y"
+#line 914 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) ConstStatementNode(GLOBAL_DATA, (yyvsp[(2) - (3)].constDeclList).m_node.head), (yyvsp[(2) - (3)].constDeclList).m_varDeclarations, (yyvsp[(2) - (3)].constDeclList).m_funcDeclarations, (yyvsp[(2) - (3)].constDeclList).m_features, (yyvsp[(2) - (3)].constDeclList).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(2) - (3)])); AUTO_SEMICOLON; ;}
     break;
 
   case 232:
-#line 919 "../parser/Grammar.y"
+#line 919 "parser/Grammar.y"
     { (yyval.constDeclList).m_node.head = (yyvsp[(1) - (1)].constDeclNode).m_node;
                                           (yyval.constDeclList).m_node.tail = (yyval.constDeclList).m_node.head;
                                           (yyval.constDeclList).m_varDeclarations = new (GLOBAL_DATA) ParserArenaData<DeclarationStacks::VarStack>;
@@ -3976,7 +3976,7 @@ yyreduce:
     break;
 
   case 233:
-#line 928 "../parser/Grammar.y"
+#line 928 "parser/Grammar.y"
     { (yyval.constDeclList).m_node.head = (yyvsp[(1) - (3)].constDeclList).m_node.head;
                                           (yyvsp[(1) - (3)].constDeclList).m_node.tail->m_next = (yyvsp[(3) - (3)].constDeclNode).m_node;
                                           (yyval.constDeclList).m_node.tail = (yyvsp[(3) - (3)].constDeclNode).m_node;
@@ -3988,50 +3988,50 @@ yyreduce:
     break;
 
   case 234:
-#line 939 "../parser/Grammar.y"
+#line 939 "parser/Grammar.y"
     { (yyval.constDeclNode) = createNodeInfo<ConstDeclNode*>(new (GLOBAL_DATA) ConstDeclNode(GLOBAL_DATA, *(yyvsp[(1) - (1)].ident), 0), (*(yyvsp[(1) - (1)].ident) == GLOBAL_DATA->propertyNames->arguments) ? ArgumentsFeature : 0, 0); ;}
     break;
 
   case 235:
-#line 940 "../parser/Grammar.y"
+#line 940 "parser/Grammar.y"
     { (yyval.constDeclNode) = createNodeInfo<ConstDeclNode*>(new (GLOBAL_DATA) ConstDeclNode(GLOBAL_DATA, *(yyvsp[(1) - (2)].ident), (yyvsp[(2) - (2)].expressionNode).m_node), ((*(yyvsp[(1) - (2)].ident) == GLOBAL_DATA->propertyNames->arguments) ? ArgumentsFeature : 0) | (yyvsp[(2) - (2)].expressionNode).m_features, (yyvsp[(2) - (2)].expressionNode).m_numConstants); ;}
     break;
 
   case 236:
-#line 944 "../parser/Grammar.y"
+#line 944 "parser/Grammar.y"
     { (yyval.expressionNode) = (yyvsp[(2) - (2)].expressionNode); ;}
     break;
 
   case 237:
-#line 948 "../parser/Grammar.y"
+#line 948 "parser/Grammar.y"
     { (yyval.expressionNode) = (yyvsp[(2) - (2)].expressionNode); ;}
     break;
 
   case 238:
-#line 952 "../parser/Grammar.y"
+#line 952 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) EmptyStatementNode(GLOBAL_DATA), 0, 0, 0, 0); ;}
     break;
 
   case 239:
-#line 956 "../parser/Grammar.y"
+#line 956 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) ExprStatementNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode).m_node), 0, 0, (yyvsp[(1) - (2)].expressionNode).m_features, (yyvsp[(1) - (2)].expressionNode).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(2) - (2)])); ;}
     break;
 
   case 240:
-#line 958 "../parser/Grammar.y"
+#line 958 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) ExprStatementNode(GLOBAL_DATA, (yyvsp[(1) - (2)].expressionNode).m_node), 0, 0, (yyvsp[(1) - (2)].expressionNode).m_features, (yyvsp[(1) - (2)].expressionNode).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(1) - (2)])); AUTO_SEMICOLON; ;}
     break;
 
   case 241:
-#line 964 "../parser/Grammar.y"
+#line 964 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) IfNode(GLOBAL_DATA, (yyvsp[(3) - (5)].expressionNode).m_node, (yyvsp[(5) - (5)].statementNode).m_node), (yyvsp[(5) - (5)].statementNode).m_varDeclarations, (yyvsp[(5) - (5)].statementNode).m_funcDeclarations, (yyvsp[(3) - (5)].expressionNode).m_features | (yyvsp[(5) - (5)].statementNode).m_features, (yyvsp[(3) - (5)].expressionNode).m_numConstants + (yyvsp[(5) - (5)].statementNode).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (5)]), (yylsp[(4) - (5)])); ;}
     break;
 
   case 242:
-#line 967 "../parser/Grammar.y"
+#line 967 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) IfElseNode(GLOBAL_DATA, (yyvsp[(3) - (7)].expressionNode).m_node, (yyvsp[(5) - (7)].statementNode).m_node, (yyvsp[(7) - (7)].statementNode).m_node), 
                                                                                          mergeDeclarationLists((yyvsp[(5) - (7)].statementNode).m_varDeclarations, (yyvsp[(7) - (7)].statementNode).m_varDeclarations),
                                                                                          mergeDeclarationLists((yyvsp[(5) - (7)].statementNode).m_funcDeclarations, (yyvsp[(7) - (7)].statementNode).m_funcDeclarations),
@@ -4041,25 +4041,25 @@ yyreduce:
     break;
 
   case 243:
-#line 976 "../parser/Grammar.y"
+#line 976 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) DoWhileNode(GLOBAL_DATA, (yyvsp[(2) - (7)].statementNode).m_node, (yyvsp[(5) - (7)].expressionNode).m_node), (yyvsp[(2) - (7)].statementNode).m_varDeclarations, (yyvsp[(2) - (7)].statementNode).m_funcDeclarations, (yyvsp[(2) - (7)].statementNode).m_features | (yyvsp[(5) - (7)].expressionNode).m_features, (yyvsp[(2) - (7)].statementNode).m_numConstants + (yyvsp[(5) - (7)].expressionNode).m_numConstants);
                                              setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (7)]), (yylsp[(3) - (7)])); ;}
     break;
 
   case 244:
-#line 978 "../parser/Grammar.y"
+#line 978 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) DoWhileNode(GLOBAL_DATA, (yyvsp[(2) - (7)].statementNode).m_node, (yyvsp[(5) - (7)].expressionNode).m_node), (yyvsp[(2) - (7)].statementNode).m_varDeclarations, (yyvsp[(2) - (7)].statementNode).m_funcDeclarations, (yyvsp[(2) - (7)].statementNode).m_features | (yyvsp[(5) - (7)].expressionNode).m_features, (yyvsp[(2) - (7)].statementNode).m_numConstants + (yyvsp[(5) - (7)].expressionNode).m_numConstants);
                                              setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (7)]), (yylsp[(3) - (7)])); ;}
     break;
 
   case 245:
-#line 980 "../parser/Grammar.y"
+#line 980 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) WhileNode(GLOBAL_DATA, (yyvsp[(3) - (5)].expressionNode).m_node, (yyvsp[(5) - (5)].statementNode).m_node), (yyvsp[(5) - (5)].statementNode).m_varDeclarations, (yyvsp[(5) - (5)].statementNode).m_funcDeclarations, (yyvsp[(3) - (5)].expressionNode).m_features | (yyvsp[(5) - (5)].statementNode).m_features, (yyvsp[(3) - (5)].expressionNode).m_numConstants + (yyvsp[(5) - (5)].statementNode).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (5)]), (yylsp[(4) - (5)])); ;}
     break;
 
   case 246:
-#line 983 "../parser/Grammar.y"
+#line 983 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) ForNode(GLOBAL_DATA, (yyvsp[(3) - (9)].expressionNode).m_node, (yyvsp[(5) - (9)].expressionNode).m_node, (yyvsp[(7) - (9)].expressionNode).m_node, (yyvsp[(9) - (9)].statementNode).m_node, false), (yyvsp[(9) - (9)].statementNode).m_varDeclarations, (yyvsp[(9) - (9)].statementNode).m_funcDeclarations, 
                                                                                          (yyvsp[(3) - (9)].expressionNode).m_features | (yyvsp[(5) - (9)].expressionNode).m_features | (yyvsp[(7) - (9)].expressionNode).m_features | (yyvsp[(9) - (9)].statementNode).m_features,
                                                                                          (yyvsp[(3) - (9)].expressionNode).m_numConstants + (yyvsp[(5) - (9)].expressionNode).m_numConstants + (yyvsp[(7) - (9)].expressionNode).m_numConstants + (yyvsp[(9) - (9)].statementNode).m_numConstants);
@@ -4068,7 +4068,7 @@ yyreduce:
     break;
 
   case 247:
-#line 989 "../parser/Grammar.y"
+#line 989 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) ForNode(GLOBAL_DATA, (yyvsp[(4) - (10)].varDeclList).m_node, (yyvsp[(6) - (10)].expressionNode).m_node, (yyvsp[(8) - (10)].expressionNode).m_node, (yyvsp[(10) - (10)].statementNode).m_node, true),
                                                                                          mergeDeclarationLists((yyvsp[(4) - (10)].varDeclList).m_varDeclarations, (yyvsp[(10) - (10)].statementNode).m_varDeclarations),
                                                                                          mergeDeclarationLists((yyvsp[(4) - (10)].varDeclList).m_funcDeclarations, (yyvsp[(10) - (10)].statementNode).m_funcDeclarations),
@@ -4078,7 +4078,7 @@ yyreduce:
     break;
 
   case 248:
-#line 996 "../parser/Grammar.y"
+#line 996 "parser/Grammar.y"
     {
                                             ForInNode* node = new (GLOBAL_DATA) ForInNode(GLOBAL_DATA, (yyvsp[(3) - (7)].expressionNode).m_node, (yyvsp[(5) - (7)].expressionNode).m_node, (yyvsp[(7) - (7)].statementNode).m_node);
                                             setExceptionLocation(node, (yylsp[(3) - (7)]).first_column, (yylsp[(3) - (7)]).last_column, (yylsp[(5) - (7)]).last_column);
@@ -4090,7 +4090,7 @@ yyreduce:
     break;
 
   case 249:
-#line 1005 "../parser/Grammar.y"
+#line 1005 "parser/Grammar.y"
     { ForInNode *forIn = new (GLOBAL_DATA) ForInNode(GLOBAL_DATA, *(yyvsp[(4) - (8)].ident), 0, (yyvsp[(6) - (8)].expressionNode).m_node, (yyvsp[(8) - (8)].statementNode).m_node, (yylsp[(5) - (8)]).first_column, (yylsp[(5) - (8)]).first_column - (yylsp[(4) - (8)]).first_column, (yylsp[(6) - (8)]).last_column - (yylsp[(5) - (8)]).first_column);
                                           setExceptionLocation(forIn, (yylsp[(4) - (8)]).first_column, (yylsp[(5) - (8)]).first_column + 1, (yylsp[(6) - (8)]).last_column);
                                           appendToVarDeclarationList(GLOBAL_DATA, (yyvsp[(8) - (8)].statementNode).m_varDeclarations, *(yyvsp[(4) - (8)].ident), DeclarationStacks::HasInitializer);
@@ -4099,7 +4099,7 @@ yyreduce:
     break;
 
   case 250:
-#line 1011 "../parser/Grammar.y"
+#line 1011 "parser/Grammar.y"
     { ForInNode *forIn = new (GLOBAL_DATA) ForInNode(GLOBAL_DATA, *(yyvsp[(4) - (9)].ident), (yyvsp[(5) - (9)].expressionNode).m_node, (yyvsp[(7) - (9)].expressionNode).m_node, (yyvsp[(9) - (9)].statementNode).m_node, (yylsp[(5) - (9)]).first_column, (yylsp[(5) - (9)]).first_column - (yylsp[(4) - (9)]).first_column, (yylsp[(5) - (9)]).last_column - (yylsp[(5) - (9)]).first_column);
                                           setExceptionLocation(forIn, (yylsp[(4) - (9)]).first_column, (yylsp[(6) - (9)]).first_column + 1, (yylsp[(7) - (9)]).last_column);
                                           appendToVarDeclarationList(GLOBAL_DATA, (yyvsp[(9) - (9)].statementNode).m_varDeclarations, *(yyvsp[(4) - (9)].ident), DeclarationStacks::HasInitializer);
@@ -4110,17 +4110,17 @@ yyreduce:
     break;
 
   case 251:
-#line 1021 "../parser/Grammar.y"
+#line 1021 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(0, 0, 0); ;}
     break;
 
   case 253:
-#line 1026 "../parser/Grammar.y"
+#line 1026 "parser/Grammar.y"
     { (yyval.expressionNode) = createNodeInfo<ExpressionNode*>(0, 0, 0); ;}
     break;
 
   case 255:
-#line 1031 "../parser/Grammar.y"
+#line 1031 "parser/Grammar.y"
     { ContinueNode* node = new (GLOBAL_DATA) ContinueNode(GLOBAL_DATA);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(1) - (2)]).last_column); 
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0);
@@ -4128,7 +4128,7 @@ yyreduce:
     break;
 
   case 256:
-#line 1035 "../parser/Grammar.y"
+#line 1035 "parser/Grammar.y"
     { ContinueNode* node = new (GLOBAL_DATA) ContinueNode(GLOBAL_DATA);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(1) - (2)]).last_column); 
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0);
@@ -4136,7 +4136,7 @@ yyreduce:
     break;
 
   case 257:
-#line 1039 "../parser/Grammar.y"
+#line 1039 "parser/Grammar.y"
     { ContinueNode* node = new (GLOBAL_DATA) ContinueNode(GLOBAL_DATA, *(yyvsp[(2) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column); 
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0);
@@ -4144,7 +4144,7 @@ yyreduce:
     break;
 
   case 258:
-#line 1043 "../parser/Grammar.y"
+#line 1043 "parser/Grammar.y"
     { ContinueNode* node = new (GLOBAL_DATA) ContinueNode(GLOBAL_DATA, *(yyvsp[(2) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column); 
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0);
@@ -4152,82 +4152,82 @@ yyreduce:
     break;
 
   case 259:
-#line 1050 "../parser/Grammar.y"
+#line 1050 "parser/Grammar.y"
     { BreakNode* node = new (GLOBAL_DATA) BreakNode(GLOBAL_DATA);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(1) - (2)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(2) - (2)])); ;}
     break;
 
   case 260:
-#line 1053 "../parser/Grammar.y"
+#line 1053 "parser/Grammar.y"
     { BreakNode* node = new (GLOBAL_DATA) BreakNode(GLOBAL_DATA);
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(1) - (2)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) BreakNode(GLOBAL_DATA), 0, 0, 0, 0); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(1) - (2)])); AUTO_SEMICOLON; ;}
     break;
 
   case 261:
-#line 1056 "../parser/Grammar.y"
+#line 1056 "parser/Grammar.y"
     { BreakNode* node = new (GLOBAL_DATA) BreakNode(GLOBAL_DATA, *(yyvsp[(2) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(3) - (3)])); ;}
     break;
 
   case 262:
-#line 1059 "../parser/Grammar.y"
+#line 1059 "parser/Grammar.y"
     { BreakNode* node = new (GLOBAL_DATA) BreakNode(GLOBAL_DATA, *(yyvsp[(2) - (3)].ident));
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) BreakNode(GLOBAL_DATA, *(yyvsp[(2) - (3)].ident)), 0, 0, 0, 0); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(2) - (3)])); AUTO_SEMICOLON; ;}
     break;
 
   case 263:
-#line 1065 "../parser/Grammar.y"
+#line 1065 "parser/Grammar.y"
     { ReturnNode* node = new (GLOBAL_DATA) ReturnNode(GLOBAL_DATA, 0); 
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(1) - (2)]).last_column); 
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(2) - (2)])); ;}
     break;
 
   case 264:
-#line 1068 "../parser/Grammar.y"
+#line 1068 "parser/Grammar.y"
     { ReturnNode* node = new (GLOBAL_DATA) ReturnNode(GLOBAL_DATA, 0); 
                                           setExceptionLocation(node, (yylsp[(1) - (2)]).first_column, (yylsp[(1) - (2)]).last_column, (yylsp[(1) - (2)]).last_column); 
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, 0, 0); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(1) - (2)])); AUTO_SEMICOLON; ;}
     break;
 
   case 265:
-#line 1071 "../parser/Grammar.y"
+#line 1071 "parser/Grammar.y"
     { ReturnNode* node = new (GLOBAL_DATA) ReturnNode(GLOBAL_DATA, (yyvsp[(2) - (3)].expressionNode).m_node); 
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, (yyvsp[(2) - (3)].expressionNode).m_features, (yyvsp[(2) - (3)].expressionNode).m_numConstants); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(3) - (3)])); ;}
     break;
 
   case 266:
-#line 1074 "../parser/Grammar.y"
+#line 1074 "parser/Grammar.y"
     { ReturnNode* node = new (GLOBAL_DATA) ReturnNode(GLOBAL_DATA, (yyvsp[(2) - (3)].expressionNode).m_node); 
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column); 
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, (yyvsp[(2) - (3)].expressionNode).m_features, (yyvsp[(2) - (3)].expressionNode).m_numConstants); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(2) - (3)])); AUTO_SEMICOLON; ;}
     break;
 
   case 267:
-#line 1080 "../parser/Grammar.y"
+#line 1080 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) WithNode(GLOBAL_DATA, (yyvsp[(3) - (5)].expressionNode).m_node, (yyvsp[(5) - (5)].statementNode).m_node, (yylsp[(3) - (5)]).last_column, (yylsp[(3) - (5)]).last_column - (yylsp[(3) - (5)]).first_column),
                                                                                          (yyvsp[(5) - (5)].statementNode).m_varDeclarations, (yyvsp[(5) - (5)].statementNode).m_funcDeclarations, (yyvsp[(3) - (5)].expressionNode).m_features | (yyvsp[(5) - (5)].statementNode).m_features | WithFeature, (yyvsp[(3) - (5)].expressionNode).m_numConstants + (yyvsp[(5) - (5)].statementNode).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (5)]), (yylsp[(4) - (5)])); ;}
     break;
 
   case 268:
-#line 1086 "../parser/Grammar.y"
+#line 1086 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) SwitchNode(GLOBAL_DATA, (yyvsp[(3) - (5)].expressionNode).m_node, (yyvsp[(5) - (5)].caseBlockNode).m_node), (yyvsp[(5) - (5)].caseBlockNode).m_varDeclarations, (yyvsp[(5) - (5)].caseBlockNode).m_funcDeclarations,
                                                                                          (yyvsp[(3) - (5)].expressionNode).m_features | (yyvsp[(5) - (5)].caseBlockNode).m_features, (yyvsp[(3) - (5)].expressionNode).m_numConstants + (yyvsp[(5) - (5)].caseBlockNode).m_numConstants);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (5)]), (yylsp[(4) - (5)])); ;}
     break;
 
   case 269:
-#line 1092 "../parser/Grammar.y"
+#line 1092 "parser/Grammar.y"
     { (yyval.caseBlockNode) = createNodeDeclarationInfo<CaseBlockNode*>(new (GLOBAL_DATA) CaseBlockNode(GLOBAL_DATA, (yyvsp[(2) - (3)].clauseList).m_node.head, 0, 0), (yyvsp[(2) - (3)].clauseList).m_varDeclarations, (yyvsp[(2) - (3)].clauseList).m_funcDeclarations, (yyvsp[(2) - (3)].clauseList).m_features, (yyvsp[(2) - (3)].clauseList).m_numConstants); ;}
     break;
 
   case 270:
-#line 1094 "../parser/Grammar.y"
+#line 1094 "parser/Grammar.y"
     { (yyval.caseBlockNode) = createNodeDeclarationInfo<CaseBlockNode*>(new (GLOBAL_DATA) CaseBlockNode(GLOBAL_DATA, (yyvsp[(2) - (5)].clauseList).m_node.head, (yyvsp[(3) - (5)].caseClauseNode).m_node, (yyvsp[(4) - (5)].clauseList).m_node.head),
                                                                                          mergeDeclarationLists(mergeDeclarationLists((yyvsp[(2) - (5)].clauseList).m_varDeclarations, (yyvsp[(3) - (5)].caseClauseNode).m_varDeclarations), (yyvsp[(4) - (5)].clauseList).m_varDeclarations),
                                                                                          mergeDeclarationLists(mergeDeclarationLists((yyvsp[(2) - (5)].clauseList).m_funcDeclarations, (yyvsp[(3) - (5)].caseClauseNode).m_funcDeclarations), (yyvsp[(4) - (5)].clauseList).m_funcDeclarations),
@@ -4236,12 +4236,12 @@ yyreduce:
     break;
 
   case 271:
-#line 1102 "../parser/Grammar.y"
+#line 1102 "parser/Grammar.y"
     { (yyval.clauseList).m_node.head = 0; (yyval.clauseList).m_node.tail = 0; (yyval.clauseList).m_varDeclarations = 0; (yyval.clauseList).m_funcDeclarations = 0; (yyval.clauseList).m_features = 0; (yyval.clauseList).m_numConstants = 0; ;}
     break;
 
   case 273:
-#line 1107 "../parser/Grammar.y"
+#line 1107 "parser/Grammar.y"
     { (yyval.clauseList).m_node.head = new (GLOBAL_DATA) ClauseListNode(GLOBAL_DATA, (yyvsp[(1) - (1)].caseClauseNode).m_node);
                                           (yyval.clauseList).m_node.tail = (yyval.clauseList).m_node.head;
                                           (yyval.clauseList).m_varDeclarations = (yyvsp[(1) - (1)].caseClauseNode).m_varDeclarations;
@@ -4251,7 +4251,7 @@ yyreduce:
     break;
 
   case 274:
-#line 1113 "../parser/Grammar.y"
+#line 1113 "parser/Grammar.y"
     { (yyval.clauseList).m_node.head = (yyvsp[(1) - (2)].clauseList).m_node.head;
                                           (yyval.clauseList).m_node.tail = new (GLOBAL_DATA) ClauseListNode(GLOBAL_DATA, (yyvsp[(1) - (2)].clauseList).m_node.tail, (yyvsp[(2) - (2)].caseClauseNode).m_node);
                                           (yyval.clauseList).m_varDeclarations = mergeDeclarationLists((yyvsp[(1) - (2)].clauseList).m_varDeclarations, (yyvsp[(2) - (2)].caseClauseNode).m_varDeclarations);
@@ -4262,34 +4262,34 @@ yyreduce:
     break;
 
   case 275:
-#line 1123 "../parser/Grammar.y"
+#line 1123 "parser/Grammar.y"
     { (yyval.caseClauseNode) = createNodeDeclarationInfo<CaseClauseNode*>(new (GLOBAL_DATA) CaseClauseNode(GLOBAL_DATA, (yyvsp[(2) - (3)].expressionNode).m_node), 0, 0, (yyvsp[(2) - (3)].expressionNode).m_features, (yyvsp[(2) - (3)].expressionNode).m_numConstants); ;}
     break;
 
   case 276:
-#line 1124 "../parser/Grammar.y"
+#line 1124 "parser/Grammar.y"
     { (yyval.caseClauseNode) = createNodeDeclarationInfo<CaseClauseNode*>(new (GLOBAL_DATA) CaseClauseNode(GLOBAL_DATA, (yyvsp[(2) - (4)].expressionNode).m_node, (yyvsp[(4) - (4)].sourceElements).m_node), (yyvsp[(4) - (4)].sourceElements).m_varDeclarations, (yyvsp[(4) - (4)].sourceElements).m_funcDeclarations, (yyvsp[(2) - (4)].expressionNode).m_features | (yyvsp[(4) - (4)].sourceElements).m_features, (yyvsp[(2) - (4)].expressionNode).m_numConstants + (yyvsp[(4) - (4)].sourceElements).m_numConstants); ;}
     break;
 
   case 277:
-#line 1128 "../parser/Grammar.y"
+#line 1128 "parser/Grammar.y"
     { (yyval.caseClauseNode) = createNodeDeclarationInfo<CaseClauseNode*>(new (GLOBAL_DATA) CaseClauseNode(GLOBAL_DATA, 0), 0, 0, 0, 0); ;}
     break;
 
   case 278:
-#line 1129 "../parser/Grammar.y"
+#line 1129 "parser/Grammar.y"
     { (yyval.caseClauseNode) = createNodeDeclarationInfo<CaseClauseNode*>(new (GLOBAL_DATA) CaseClauseNode(GLOBAL_DATA, 0, (yyvsp[(3) - (3)].sourceElements).m_node), (yyvsp[(3) - (3)].sourceElements).m_varDeclarations, (yyvsp[(3) - (3)].sourceElements).m_funcDeclarations, (yyvsp[(3) - (3)].sourceElements).m_features, (yyvsp[(3) - (3)].sourceElements).m_numConstants); ;}
     break;
 
   case 279:
-#line 1133 "../parser/Grammar.y"
+#line 1133 "parser/Grammar.y"
     { LabelNode* node = new (GLOBAL_DATA) LabelNode(GLOBAL_DATA, *(yyvsp[(1) - (3)].ident), (yyvsp[(3) - (3)].statementNode).m_node);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, (yyvsp[(3) - (3)].statementNode).m_varDeclarations, (yyvsp[(3) - (3)].statementNode).m_funcDeclarations, (yyvsp[(3) - (3)].statementNode).m_features, (yyvsp[(3) - (3)].statementNode).m_numConstants); ;}
     break;
 
   case 280:
-#line 1139 "../parser/Grammar.y"
+#line 1139 "parser/Grammar.y"
     { ThrowNode* node = new (GLOBAL_DATA) ThrowNode(GLOBAL_DATA, (yyvsp[(2) - (3)].expressionNode).m_node);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, (yyvsp[(2) - (3)].expressionNode).m_features, (yyvsp[(2) - (3)].expressionNode).m_numConstants); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(2) - (3)]));
@@ -4297,7 +4297,7 @@ yyreduce:
     break;
 
   case 281:
-#line 1143 "../parser/Grammar.y"
+#line 1143 "parser/Grammar.y"
     { ThrowNode* node = new (GLOBAL_DATA) ThrowNode(GLOBAL_DATA, (yyvsp[(2) - (3)].expressionNode).m_node);
                                           setExceptionLocation(node, (yylsp[(1) - (3)]).first_column, (yylsp[(2) - (3)]).last_column, (yylsp[(2) - (3)]).last_column);
                                           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(node, 0, 0, (yyvsp[(2) - (3)].expressionNode).m_features, (yyvsp[(2) - (3)].expressionNode).m_numConstants); setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (3)]), (yylsp[(2) - (3)])); AUTO_SEMICOLON; 
@@ -4305,7 +4305,7 @@ yyreduce:
     break;
 
   case 282:
-#line 1150 "../parser/Grammar.y"
+#line 1150 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) TryNode(GLOBAL_DATA, (yyvsp[(2) - (4)].statementNode).m_node, GLOBAL_DATA->propertyNames->nullIdentifier, false, 0, (yyvsp[(4) - (4)].statementNode).m_node),
                                                                                          mergeDeclarationLists((yyvsp[(2) - (4)].statementNode).m_varDeclarations, (yyvsp[(4) - (4)].statementNode).m_varDeclarations),
                                                                                          mergeDeclarationLists((yyvsp[(2) - (4)].statementNode).m_funcDeclarations, (yyvsp[(4) - (4)].statementNode).m_funcDeclarations),
@@ -4315,7 +4315,7 @@ yyreduce:
     break;
 
   case 283:
-#line 1156 "../parser/Grammar.y"
+#line 1156 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) TryNode(GLOBAL_DATA, (yyvsp[(2) - (7)].statementNode).m_node, *(yyvsp[(5) - (7)].ident), ((yyvsp[(7) - (7)].statementNode).m_features & EvalFeature) != 0, (yyvsp[(7) - (7)].statementNode).m_node, 0),
                                                                                          mergeDeclarationLists((yyvsp[(2) - (7)].statementNode).m_varDeclarations, (yyvsp[(7) - (7)].statementNode).m_varDeclarations),
                                                                                          mergeDeclarationLists((yyvsp[(2) - (7)].statementNode).m_funcDeclarations, (yyvsp[(7) - (7)].statementNode).m_funcDeclarations),
@@ -4325,7 +4325,7 @@ yyreduce:
     break;
 
   case 284:
-#line 1163 "../parser/Grammar.y"
+#line 1163 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) TryNode(GLOBAL_DATA, (yyvsp[(2) - (9)].statementNode).m_node, *(yyvsp[(5) - (9)].ident), ((yyvsp[(7) - (9)].statementNode).m_features & EvalFeature) != 0, (yyvsp[(7) - (9)].statementNode).m_node, (yyvsp[(9) - (9)].statementNode).m_node),
                                                                                          mergeDeclarationLists(mergeDeclarationLists((yyvsp[(2) - (9)].statementNode).m_varDeclarations, (yyvsp[(7) - (9)].statementNode).m_varDeclarations), (yyvsp[(9) - (9)].statementNode).m_varDeclarations),
                                                                                          mergeDeclarationLists(mergeDeclarationLists((yyvsp[(2) - (9)].statementNode).m_funcDeclarations, (yyvsp[(7) - (9)].statementNode).m_funcDeclarations), (yyvsp[(9) - (9)].statementNode).m_funcDeclarations),
@@ -4335,24 +4335,24 @@ yyreduce:
     break;
 
   case 285:
-#line 1172 "../parser/Grammar.y"
+#line 1172 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) DebuggerStatementNode(GLOBAL_DATA), 0, 0, 0, 0);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(2) - (2)])); ;}
     break;
 
   case 286:
-#line 1174 "../parser/Grammar.y"
+#line 1174 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) DebuggerStatementNode(GLOBAL_DATA), 0, 0, 0, 0);
                                           setStatementLocation((yyval.statementNode).m_node, (yylsp[(1) - (2)]), (yylsp[(1) - (2)])); AUTO_SEMICOLON; ;}
     break;
 
   case 287:
-#line 1179 "../parser/Grammar.y"
+#line 1179 "parser/Grammar.y"
     { (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) FuncDeclNode(GLOBAL_DATA, *(yyvsp[(2) - (7)].ident), (yyvsp[(6) - (7)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(5) - (7)].intValue), (yyvsp[(7) - (7)].intValue), (yylsp[(5) - (7)]).first_line)), 0, new (GLOBAL_DATA) ParserArenaData<DeclarationStacks::FunctionStack>, ((*(yyvsp[(2) - (7)].ident) == GLOBAL_DATA->propertyNames->arguments) ? ArgumentsFeature : 0) | ClosureFeature, 0); setStatementLocation((yyvsp[(6) - (7)].functionBodyNode), (yylsp[(5) - (7)]), (yylsp[(7) - (7)])); (yyval.statementNode).m_funcDeclarations->data.append(static_cast<FuncDeclNode*>((yyval.statementNode).m_node)->body()); ;}
     break;
 
   case 288:
-#line 1181 "../parser/Grammar.y"
+#line 1181 "parser/Grammar.y"
     {
           (yyval.statementNode) = createNodeDeclarationInfo<StatementNode*>(new (GLOBAL_DATA) FuncDeclNode(GLOBAL_DATA, *(yyvsp[(2) - (8)].ident), (yyvsp[(7) - (8)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(6) - (8)].intValue), (yyvsp[(8) - (8)].intValue), (yylsp[(6) - (8)]).first_line), (yyvsp[(4) - (8)].parameterList).m_node.head), 0, new (GLOBAL_DATA) ParserArenaData<DeclarationStacks::FunctionStack>, ((*(yyvsp[(2) - (8)].ident) == GLOBAL_DATA->propertyNames->arguments) ? ArgumentsFeature : 0) | (yyvsp[(4) - (8)].parameterList).m_features | ClosureFeature, 0);
           if ((yyvsp[(4) - (8)].parameterList).m_features & ArgumentsFeature)
@@ -4363,12 +4363,12 @@ yyreduce:
     break;
 
   case 289:
-#line 1191 "../parser/Grammar.y"
+#line 1191 "parser/Grammar.y"
     { (yyval.funcExprNode) = createNodeInfo(new (GLOBAL_DATA) FuncExprNode(GLOBAL_DATA, GLOBAL_DATA->propertyNames->nullIdentifier, (yyvsp[(5) - (6)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(4) - (6)].intValue), (yyvsp[(6) - (6)].intValue), (yylsp[(4) - (6)]).first_line)), ClosureFeature, 0); setStatementLocation((yyvsp[(5) - (6)].functionBodyNode), (yylsp[(4) - (6)]), (yylsp[(6) - (6)])); ;}
     break;
 
   case 290:
-#line 1193 "../parser/Grammar.y"
+#line 1193 "parser/Grammar.y"
     {
           (yyval.funcExprNode) = createNodeInfo(new (GLOBAL_DATA) FuncExprNode(GLOBAL_DATA, GLOBAL_DATA->propertyNames->nullIdentifier, (yyvsp[(6) - (7)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(5) - (7)].intValue), (yyvsp[(7) - (7)].intValue), (yylsp[(5) - (7)]).first_line), (yyvsp[(3) - (7)].parameterList).m_node.head), (yyvsp[(3) - (7)].parameterList).m_features | ClosureFeature, 0);
           if ((yyvsp[(3) - (7)].parameterList).m_features & ArgumentsFeature)
@@ -4378,12 +4378,12 @@ yyreduce:
     break;
 
   case 291:
-#line 1199 "../parser/Grammar.y"
+#line 1199 "parser/Grammar.y"
     { (yyval.funcExprNode) = createNodeInfo(new (GLOBAL_DATA) FuncExprNode(GLOBAL_DATA, *(yyvsp[(2) - (7)].ident), (yyvsp[(6) - (7)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(5) - (7)].intValue), (yyvsp[(7) - (7)].intValue), (yylsp[(5) - (7)]).first_line)), ClosureFeature, 0); setStatementLocation((yyvsp[(6) - (7)].functionBodyNode), (yylsp[(5) - (7)]), (yylsp[(7) - (7)])); ;}
     break;
 
   case 292:
-#line 1201 "../parser/Grammar.y"
+#line 1201 "parser/Grammar.y"
     {
           (yyval.funcExprNode) = createNodeInfo(new (GLOBAL_DATA) FuncExprNode(GLOBAL_DATA, *(yyvsp[(2) - (8)].ident), (yyvsp[(7) - (8)].functionBodyNode), GLOBAL_DATA->lexer->sourceCode((yyvsp[(6) - (8)].intValue), (yyvsp[(8) - (8)].intValue), (yylsp[(6) - (8)]).first_line), (yyvsp[(4) - (8)].parameterList).m_node.head), (yyvsp[(4) - (8)].parameterList).m_features | ClosureFeature, 0); 
           if ((yyvsp[(4) - (8)].parameterList).m_features & ArgumentsFeature)
@@ -4393,42 +4393,42 @@ yyreduce:
     break;
 
   case 293:
-#line 1210 "../parser/Grammar.y"
+#line 1210 "parser/Grammar.y"
     { (yyval.parameterList).m_node.head = new (GLOBAL_DATA) ParameterNode(GLOBAL_DATA, *(yyvsp[(1) - (1)].ident));
                                           (yyval.parameterList).m_features = (*(yyvsp[(1) - (1)].ident) == GLOBAL_DATA->propertyNames->arguments) ? ArgumentsFeature : 0;
                                           (yyval.parameterList).m_node.tail = (yyval.parameterList).m_node.head; ;}
     break;
 
   case 294:
-#line 1213 "../parser/Grammar.y"
+#line 1213 "parser/Grammar.y"
     { (yyval.parameterList).m_node.head = (yyvsp[(1) - (3)].parameterList).m_node.head;
                                           (yyval.parameterList).m_features = (yyvsp[(1) - (3)].parameterList).m_features | ((*(yyvsp[(3) - (3)].ident) == GLOBAL_DATA->propertyNames->arguments) ? ArgumentsFeature : 0);
                                           (yyval.parameterList).m_node.tail = new (GLOBAL_DATA) ParameterNode(GLOBAL_DATA, (yyvsp[(1) - (3)].parameterList).m_node.tail, *(yyvsp[(3) - (3)].ident));  ;}
     break;
 
   case 295:
-#line 1219 "../parser/Grammar.y"
+#line 1219 "parser/Grammar.y"
     { (yyval.functionBodyNode) = FunctionBodyNode::create(GLOBAL_DATA); ;}
     break;
 
   case 296:
-#line 1220 "../parser/Grammar.y"
+#line 1220 "parser/Grammar.y"
     { (yyval.functionBodyNode) = FunctionBodyNode::create(GLOBAL_DATA); ;}
     break;
 
   case 297:
-#line 1224 "../parser/Grammar.y"
+#line 1224 "parser/Grammar.y"
     { GLOBAL_DATA->parser->didFinishParsing(new (GLOBAL_DATA) SourceElements(GLOBAL_DATA), 0, 0, NoFeatures, (yylsp[(0) - (0)]).last_line, 0); ;}
     break;
 
   case 298:
-#line 1225 "../parser/Grammar.y"
+#line 1225 "parser/Grammar.y"
     { GLOBAL_DATA->parser->didFinishParsing((yyvsp[(1) - (1)].sourceElements).m_node, (yyvsp[(1) - (1)].sourceElements).m_varDeclarations, (yyvsp[(1) - (1)].sourceElements).m_funcDeclarations, (yyvsp[(1) - (1)].sourceElements).m_features, 
                                                                                 (yylsp[(1) - (1)]).last_line, (yyvsp[(1) - (1)].sourceElements).m_numConstants); ;}
     break;
 
   case 299:
-#line 1230 "../parser/Grammar.y"
+#line 1230 "parser/Grammar.y"
     { (yyval.sourceElements).m_node = new (GLOBAL_DATA) SourceElements(GLOBAL_DATA);
                                           (yyval.sourceElements).m_node->append((yyvsp[(1) - (1)].statementNode).m_node);
                                           (yyval.sourceElements).m_varDeclarations = (yyvsp[(1) - (1)].statementNode).m_varDeclarations;
@@ -4439,7 +4439,7 @@ yyreduce:
     break;
 
   case 300:
-#line 1237 "../parser/Grammar.y"
+#line 1237 "parser/Grammar.y"
     { (yyval.sourceElements).m_node->append((yyvsp[(2) - (2)].statementNode).m_node);
                                           (yyval.sourceElements).m_varDeclarations = mergeDeclarationLists((yyvsp[(1) - (2)].sourceElements).m_varDeclarations, (yyvsp[(2) - (2)].statementNode).m_varDeclarations);
                                           (yyval.sourceElements).m_funcDeclarations = mergeDeclarationLists((yyvsp[(1) - (2)].sourceElements).m_funcDeclarations, (yyvsp[(2) - (2)].statementNode).m_funcDeclarations);
@@ -4449,188 +4449,188 @@ yyreduce:
     break;
 
   case 304:
-#line 1251 "../parser/Grammar.y"
+#line 1251 "parser/Grammar.y"
     { ;}
     break;
 
   case 305:
-#line 1252 "../parser/Grammar.y"
+#line 1252 "parser/Grammar.y"
     { ;}
     break;
 
   case 306:
-#line 1253 "../parser/Grammar.y"
+#line 1253 "parser/Grammar.y"
     { if (!GLOBAL_DATA->lexer->skipRegExp()) YYABORT; ;}
     break;
 
   case 307:
-#line 1254 "../parser/Grammar.y"
+#line 1254 "parser/Grammar.y"
     { if (!GLOBAL_DATA->lexer->skipRegExp()) YYABORT; ;}
     break;
 
   case 308:
-#line 1258 "../parser/Grammar.y"
+#line 1258 "parser/Grammar.y"
     { ;}
     break;
 
   case 309:
-#line 1259 "../parser/Grammar.y"
+#line 1259 "parser/Grammar.y"
     { ;}
     break;
 
   case 310:
-#line 1260 "../parser/Grammar.y"
+#line 1260 "parser/Grammar.y"
     { ;}
     break;
 
   case 311:
-#line 1261 "../parser/Grammar.y"
+#line 1261 "parser/Grammar.y"
     { if (*(yyvsp[(1) - (7)].ident) != "get" && *(yyvsp[(1) - (7)].ident) != "set") YYABORT; ;}
     break;
 
   case 312:
-#line 1262 "../parser/Grammar.y"
+#line 1262 "parser/Grammar.y"
     { if (*(yyvsp[(1) - (8)].ident) != "get" && *(yyvsp[(1) - (8)].ident) != "set") YYABORT; ;}
     break;
 
   case 316:
-#line 1272 "../parser/Grammar.y"
+#line 1272 "parser/Grammar.y"
     { ;}
     break;
 
   case 317:
-#line 1273 "../parser/Grammar.y"
+#line 1273 "parser/Grammar.y"
     { ;}
     break;
 
   case 318:
-#line 1275 "../parser/Grammar.y"
+#line 1275 "parser/Grammar.y"
     { ;}
     break;
 
   case 322:
-#line 1282 "../parser/Grammar.y"
+#line 1282 "parser/Grammar.y"
     { ;}
     break;
 
   case 517:
-#line 1650 "../parser/Grammar.y"
+#line 1650 "parser/Grammar.y"
     { ;}
     break;
 
   case 518:
-#line 1651 "../parser/Grammar.y"
+#line 1651 "parser/Grammar.y"
     { ;}
     break;
 
   case 520:
-#line 1656 "../parser/Grammar.y"
+#line 1656 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 521:
-#line 1660 "../parser/Grammar.y"
+#line 1660 "parser/Grammar.y"
     { ;}
     break;
 
   case 522:
-#line 1661 "../parser/Grammar.y"
+#line 1661 "parser/Grammar.y"
     { ;}
     break;
 
   case 525:
-#line 1667 "../parser/Grammar.y"
+#line 1667 "parser/Grammar.y"
     { ;}
     break;
 
   case 526:
-#line 1668 "../parser/Grammar.y"
+#line 1668 "parser/Grammar.y"
     { ;}
     break;
 
   case 530:
-#line 1675 "../parser/Grammar.y"
+#line 1675 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 533:
-#line 1684 "../parser/Grammar.y"
+#line 1684 "parser/Grammar.y"
     { ;}
     break;
 
   case 534:
-#line 1685 "../parser/Grammar.y"
+#line 1685 "parser/Grammar.y"
     { ;}
     break;
 
   case 539:
-#line 1702 "../parser/Grammar.y"
+#line 1702 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 555:
-#line 1733 "../parser/Grammar.y"
+#line 1733 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 557:
-#line 1735 "../parser/Grammar.y"
+#line 1735 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 559:
-#line 1740 "../parser/Grammar.y"
+#line 1740 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 561:
-#line 1742 "../parser/Grammar.y"
+#line 1742 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 563:
-#line 1747 "../parser/Grammar.y"
+#line 1747 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 565:
-#line 1749 "../parser/Grammar.y"
+#line 1749 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 568:
-#line 1761 "../parser/Grammar.y"
+#line 1761 "parser/Grammar.y"
     { ;}
     break;
 
   case 569:
-#line 1762 "../parser/Grammar.y"
+#line 1762 "parser/Grammar.y"
     { ;}
     break;
 
   case 578:
-#line 1786 "../parser/Grammar.y"
+#line 1786 "parser/Grammar.y"
     { ;}
     break;
 
   case 580:
-#line 1791 "../parser/Grammar.y"
+#line 1791 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 585:
-#line 1802 "../parser/Grammar.y"
+#line 1802 "parser/Grammar.y"
     { AUTO_SEMICOLON; ;}
     break;
 
   case 592:
-#line 1818 "../parser/Grammar.y"
+#line 1818 "parser/Grammar.y"
     { ;}
     break;
 
 
 /* Line 1267 of yacc.c.  */
-#line 4634 "JavaScriptCore/tmp/../generated/Grammar.tab.c"
+#line 4634 "generated/Grammar.tab.c"
       default: break;
     }
   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
@@ -4850,7 +4850,7 @@ yyreturn:
 }
 
 
-#line 1834 "../parser/Grammar.y"
+#line 1834 "parser/Grammar.y"
 
 
 #undef GLOBAL_DATA
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.h
index 1fdb035..43a605a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/Grammar.h
@@ -174,7 +174,7 @@
 
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 typedef union YYSTYPE
-#line 146 "../parser/Grammar.y"
+#line 146 "parser/Grammar.y"
 {
     int                 intValue;
     double              doubleValue;
@@ -207,7 +207,7 @@ typedef union YYSTYPE
     Operator            op;
 }
 /* Line 1489 of yacc.c.  */
-#line 211 "JavaScriptCore/tmp/../generated/Grammar.tab.h"
+#line 211 "generated/Grammar.tab.h"
 	YYSTYPE;
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/JSONObject.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/JSONObject.lut.h
index a9b1631..f1a8210 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/JSONObject.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/JSONObject.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../runtime/JSONObject.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/JSONObject.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/Lexer.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/Lexer.lut.h
index 95c33b6..107d98a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/Lexer.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/Lexer.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../parser/Keywords.table using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from parser/Keywords.table using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/MathObject.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/MathObject.lut.h
index 9cb0ee2..becbb8c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/MathObject.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/MathObject.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../runtime/MathObject.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/MathObject.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/NumberConstructor.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/NumberConstructor.lut.h
index 6285d62..9d754c7 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/NumberConstructor.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/NumberConstructor.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../runtime/NumberConstructor.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/NumberConstructor.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpConstructor.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpConstructor.lut.h
index a3f15b3..c5fe7ad 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpConstructor.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpConstructor.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../runtime/RegExpConstructor.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/RegExpConstructor.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpObject.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpObject.lut.h
index 8c87f16..2d684ae 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpObject.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/RegExpObject.lut.h
@@ -1,4 +1,4 @@
-// Automatically generated from ../runtime/RegExpObject.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/RegExpObject.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/generated/StringPrototype.lut.h b/src/3rdparty/javascriptcore/JavaScriptCore/generated/StringPrototype.lut.h
index f912298..c5dd4f0 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/generated/StringPrototype.lut.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/generated/StringPrototype.lut.h
@@ -1,10 +1,10 @@
-// Automatically generated from ../runtime/StringPrototype.cpp using JavaScriptCore/create_hash_table. DO NOT EDIT!
+// Automatically generated from runtime/StringPrototype.cpp using /home/khansen/dev/qtwebkit-qtscript-integration/JavaScriptCore/create_hash_table. DO NOT EDIT!
 
 #include "Lookup.h"
 
 namespace JSC {
 
-static const struct HashTableValue stringTableValues[33] = {
+static const struct HashTableValue stringTableValues[36] = {
    { "toString", DontEnum|Function, (intptr_t)stringProtoFuncToString, (intptr_t)0 },
    { "valueOf", DontEnum|Function, (intptr_t)stringProtoFuncToString, (intptr_t)0 },
    { "charAt", DontEnum|Function, (intptr_t)stringProtoFuncCharAt, (intptr_t)1 },
@@ -37,9 +37,12 @@ static const struct HashTableValue stringTableValues[33] = {
    { "fontsize", DontEnum|Function, (intptr_t)stringProtoFuncFontsize, (intptr_t)1 },
    { "anchor", DontEnum|Function, (intptr_t)stringProtoFuncAnchor, (intptr_t)1 },
    { "link", DontEnum|Function, (intptr_t)stringProtoFuncLink, (intptr_t)1 },
+   { "trim", DontEnum|Function, (intptr_t)stringProtoFuncTrim, (intptr_t)0 },
+   { "trimLeft", DontEnum|Function, (intptr_t)stringProtoFuncTrimLeft, (intptr_t)0 },
+   { "trimRight", DontEnum|Function, (intptr_t)stringProtoFuncTrimRight, (intptr_t)0 },
    { 0, 0, 0, 0 }
 };
 
 extern JSC_CONST_HASHTABLE HashTable stringTable =
-    { 71, 63, stringTableValues, 0 };
+    { 133, 127, stringTableValues, 0 };
 } // namespace
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CachedCall.h b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CachedCall.h
index b9fa484..eb48a03 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CachedCall.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CachedCall.h
@@ -38,7 +38,7 @@ namespace JSC {
             : m_valid(false)
             , m_interpreter(callFrame->interpreter())
             , m_exception(exception)
-            , m_globalObjectScope(callFrame, callFrame->globalData().dynamicGlobalObject ? callFrame->globalData().dynamicGlobalObject : function->scope().node()->globalObject())
+            , m_globalObjectScope(callFrame, function->scope().globalObject())
         {
             ASSERT(!function->isHostFunction());
             m_closure = m_interpreter->prepareForRepeatCall(function->jsExecutable(), callFrame, function, argCount, function->scope().node(), exception);
@@ -52,7 +52,14 @@ namespace JSC {
         }
         void setThis(JSValue v) { m_closure.setArgument(0, v); }
         void setArgument(int n, JSValue v) { m_closure.setArgument(n + 1, v); }
-        CallFrame* newCallFrame() { return m_closure.newCallFrame; }
+
+        CallFrame* newCallFrame(ExecState* exec)
+        {
+            CallFrame* callFrame = m_closure.newCallFrame;
+            callFrame->setScopeChain(exec->scopeChain());
+            return callFrame;
+        }
+
         ~CachedCall()
         {
             if (m_valid)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CallFrame.h b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CallFrame.h
index b04e1c1..6432f99 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CallFrame.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/CallFrame.h
@@ -39,7 +39,11 @@ namespace JSC  {
     public:
         JSObject* callee() const { return this[RegisterFile::Callee].object(); }
         CodeBlock* codeBlock() const { return this[RegisterFile::CodeBlock].Register::codeBlock(); }
-        ScopeChainNode* scopeChain() const { return this[RegisterFile::ScopeChain].Register::scopeChain(); }
+        ScopeChainNode* scopeChain() const
+        {
+            ASSERT(this[RegisterFile::ScopeChain].Register::scopeChain());
+            return this[RegisterFile::ScopeChain].Register::scopeChain();
+        }
         int argumentCount() const { return this[RegisterFile::ArgumentCount].i(); }
 
         JSValue thisValue();
@@ -51,14 +55,14 @@ namespace JSC  {
         // Differs from dynamicGlobalObject() during function calls across web browser frames.
         JSGlobalObject* lexicalGlobalObject() const
         {
-            return scopeChain()->globalObject();
+            return scopeChain()->globalObject;
         }
 
         // Differs from lexicalGlobalObject because this will have DOM window shell rather than
         // the actual DOM window, which can't be "this" for security reasons.
         JSObject* globalThisValue() const
         {
-            return scopeChain()->globalThisObject();
+            return scopeChain()->globalThis;
         }
 
         // FIXME: Elsewhere, we use JSGlobalData* rather than JSGlobalData&.
@@ -66,6 +70,7 @@ namespace JSC  {
         // or a pointer everywhere.
         JSGlobalData& globalData() const
         {
+            ASSERT(scopeChain()->globalData);
             return *scopeChain()->globalData;
         }
 
@@ -105,9 +110,9 @@ namespace JSC  {
         Arguments* optionalCalleeArguments() const { return this[RegisterFile::OptionalCalleeArguments].arguments(); }
         Instruction* returnPC() const { return this[RegisterFile::ReturnPC].vPC(); }
 
-        void setCalleeArguments(JSValue arguments) { this[RegisterFile::OptionalCalleeArguments] = arguments; }
-        void setCallerFrame(CallFrame* callerFrame) { this[RegisterFile::CallerFrame] = callerFrame; }
-        void setScopeChain(ScopeChainNode* scopeChain) { this[RegisterFile::ScopeChain] = scopeChain; }
+        void setCalleeArguments(JSValue arguments) { static_cast<Register*>(this)[RegisterFile::OptionalCalleeArguments] = arguments; }
+        void setCallerFrame(CallFrame* callerFrame) { static_cast<Register*>(this)[RegisterFile::CallerFrame] = callerFrame; }
+        void setScopeChain(ScopeChainNode* scopeChain) { static_cast<Register*>(this)[RegisterFile::ScopeChain] = scopeChain; }
 
         ALWAYS_INLINE void init(CodeBlock* codeBlock, Instruction* vPC, ScopeChainNode* scopeChain,
             CallFrame* callerFrame, int returnValueRegister, int argc, JSObject* callee)
@@ -117,8 +122,8 @@ namespace JSC  {
             setCodeBlock(codeBlock);
             setScopeChain(scopeChain);
             setCallerFrame(callerFrame);
-            this[RegisterFile::ReturnPC] = vPC; // This is either an Instruction* or a pointer into JIT generated code stored as an Instruction*.
-            this[RegisterFile::ReturnValueRegister] = Register::withInt(returnValueRegister);
+            static_cast<Register*>(this)[RegisterFile::ReturnPC] = vPC; // This is either an Instruction* or a pointer into JIT generated code stored as an Instruction*.
+            static_cast<Register*>(this)[RegisterFile::ReturnValueRegister] = Register::withInt(returnValueRegister);
             setArgumentCount(argc); // original argument count (for the sake of the "arguments" object)
             setCallee(callee);
             setCalleeArguments(JSValue());
@@ -135,9 +140,9 @@ namespace JSC  {
         CallFrame* removeHostCallFrameFlag() { return reinterpret_cast<CallFrame*>(reinterpret_cast<intptr_t>(this) & ~HostCallFrameFlag); }
 
     private:
-        void setArgumentCount(int count) { this[RegisterFile::ArgumentCount] = Register::withInt(count); }
-        void setCallee(JSObject* callee) { this[RegisterFile::Callee] = callee; }
-        void setCodeBlock(CodeBlock* codeBlock) { this[RegisterFile::CodeBlock] = codeBlock; }
+        void setArgumentCount(int count) { static_cast<Register*>(this)[RegisterFile::ArgumentCount] = Register::withInt(count); }
+        void setCallee(JSObject* callee) { static_cast<Register*>(this)[RegisterFile::Callee] = callee; }
+        void setCodeBlock(CodeBlock* codeBlock) { static_cast<Register*>(this)[RegisterFile::CodeBlock] = codeBlock; }
 
         static const intptr_t HostCallFrameFlag = 1;
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp
index 4f00b2b..2164b1d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp
@@ -95,8 +95,8 @@ static int depth(CodeBlock* codeBlock, ScopeChain& sc)
 #if USE(INTERPRETER)
 NEVER_INLINE bool Interpreter::resolve(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
 {
-    int dst = (vPC + 1)->u.operand;
-    int property = (vPC + 2)->u.operand;
+    int dst = vPC[1].u.operand;
+    int property = vPC[2].u.operand;
 
     ScopeChainNode* scopeChain = callFrame->scopeChain();
     ScopeChainIterator iter = scopeChain->begin();
@@ -125,9 +125,9 @@ NEVER_INLINE bool Interpreter::resolveSkip(CallFrame* callFrame, Instruction* vP
 {
     CodeBlock* codeBlock = callFrame->codeBlock();
 
-    int dst = (vPC + 1)->u.operand;
-    int property = (vPC + 2)->u.operand;
-    int skip = (vPC + 3)->u.operand + codeBlock->needsFullScopeChain();
+    int dst = vPC[1].u.operand;
+    int property = vPC[2].u.operand;
+    int skip = vPC[3].u.operand + codeBlock->needsFullScopeChain();
 
     ScopeChainNode* scopeChain = callFrame->scopeChain();
     ScopeChainIterator iter = scopeChain->begin();
@@ -156,12 +156,12 @@ NEVER_INLINE bool Interpreter::resolveSkip(CallFrame* callFrame, Instruction* vP
 
 NEVER_INLINE bool Interpreter::resolveGlobal(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
 {
-    int dst = (vPC + 1)->u.operand;
-    JSGlobalObject* globalObject = static_cast<JSGlobalObject*>((vPC + 2)->u.jsCell);
+    int dst = vPC[1].u.operand;
+    JSGlobalObject* globalObject = static_cast<JSGlobalObject*>(vPC[2].u.jsCell);
     ASSERT(globalObject->isGlobalObject());
-    int property = (vPC + 3)->u.operand;
-    Structure* structure = (vPC + 4)->u.structure;
-    int offset = (vPC + 5)->u.operand;
+    int property = vPC[3].u.operand;
+    Structure* structure = vPC[4].u.structure;
+    int offset = vPC[5].u.operand;
 
     if (structure == globalObject->structure()) {
         callFrame->r(dst) = JSValue(globalObject->getDirectOffset(offset));
@@ -196,16 +196,16 @@ NEVER_INLINE bool Interpreter::resolveGlobal(CallFrame* callFrame, Instruction*
 
 NEVER_INLINE void Interpreter::resolveBase(CallFrame* callFrame, Instruction* vPC)
 {
-    int dst = (vPC + 1)->u.operand;
-    int property = (vPC + 2)->u.operand;
+    int dst = vPC[1].u.operand;
+    int property = vPC[2].u.operand;
     callFrame->r(dst) = JSValue(JSC::resolveBase(callFrame, callFrame->codeBlock()->identifier(property), callFrame->scopeChain()));
 }
 
 NEVER_INLINE bool Interpreter::resolveBaseAndProperty(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
 {
-    int baseDst = (vPC + 1)->u.operand;
-    int propDst = (vPC + 2)->u.operand;
-    int property = (vPC + 3)->u.operand;
+    int baseDst = vPC[1].u.operand;
+    int propDst = vPC[2].u.operand;
+    int property = vPC[3].u.operand;
 
     ScopeChainNode* scopeChain = callFrame->scopeChain();
     ScopeChainIterator iter = scopeChain->begin();
@@ -237,51 +237,6 @@ NEVER_INLINE bool Interpreter::resolveBaseAndProperty(CallFrame* callFrame, Inst
     return false;
 }
 
-NEVER_INLINE bool Interpreter::resolveBaseAndFunc(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
-{
-    int baseDst = (vPC + 1)->u.operand;
-    int funcDst = (vPC + 2)->u.operand;
-    int property = (vPC + 3)->u.operand;
-
-    ScopeChainNode* scopeChain = callFrame->scopeChain();
-    ScopeChainIterator iter = scopeChain->begin();
-    ScopeChainIterator end = scopeChain->end();
-
-    // FIXME: add scopeDepthIsZero optimization
-
-    ASSERT(iter != end);
-
-    CodeBlock* codeBlock = callFrame->codeBlock();
-    Identifier& ident = codeBlock->identifier(property);
-    JSObject* base;
-    do {
-        base = *iter;
-        PropertySlot slot(base);
-        if (base->getPropertySlot(callFrame, ident, slot)) {            
-            // ECMA 11.2.3 says that if we hit an activation the this value should be null.
-            // However, section 10.2.3 says that in the case where the value provided
-            // by the caller is null, the global object should be used. It also says
-            // that the section does not apply to internal functions, but for simplicity
-            // of implementation we use the global object anyway here. This guarantees
-            // that in host objects you always get a valid object for this.
-            // We also handle wrapper substitution for the global object at the same time.
-            JSObject* thisObj = base->toThisObject(callFrame);
-            JSValue result = slot.getValue(callFrame, ident);
-            exceptionValue = callFrame->globalData().exception;
-            if (exceptionValue)
-                return false;
-
-            callFrame->r(baseDst) = JSValue(thisObj);
-            callFrame->r(funcDst) = JSValue(result);
-            return true;
-        }
-        ++iter;
-    } while (iter != end);
-
-    exceptionValue = createUndefinedVariableError(callFrame, ident, vPC - codeBlock->instructions().begin(), codeBlock);
-    return false;
-}
-
 #endif // USE(INTERPRETER)
 
 ALWAYS_INLINE CallFrame* Interpreter::slideRegisterWindowForCall(CodeBlock* newCodeBlock, RegisterFile* registerFile, CallFrame* callFrame, size_t registerOffset, int argc)
@@ -349,7 +304,7 @@ NEVER_INLINE JSValue Interpreter::callEval(CallFrame* callFrame, RegisterFile* r
     if (!program.isString())
         return program;
 
-    UString programSource = asString(program)->value();
+    UString programSource = asString(program)->value(callFrame);
 
     LiteralParser preparser(callFrame, programSource, LiteralParser::NonStrictJSON);
     if (JSValue parsedObject = preparser.tryLiteralParse())
@@ -367,10 +322,19 @@ NEVER_INLINE JSValue Interpreter::callEval(CallFrame* callFrame, RegisterFile* r
 }
 
 Interpreter::Interpreter()
-    : m_sampler(0)
+    : m_sampleEntryDepth(0)
     , m_reentryDepth(0)
 {
+#if HAVE(COMPUTED_GOTO)
     privateExecute(InitializeAndReturn, 0, 0, 0);
+
+    for (int i = 0; i < numOpcodeIDs; ++i)
+        m_opcodeIDTable.add(m_opcodeTable[i], static_cast<OpcodeID>(i));
+#endif // HAVE(COMPUTED_GOTO)
+
+#if ENABLE(OPCODE_SAMPLING)
+    enableSampler();
+#endif
 }
 
 #ifndef NDEBUG
@@ -389,7 +353,7 @@ void Interpreter::dumpRegisters(CallFrame* callFrame)
     printf("-----------------------------------------------------------------------------\n");
 
     CodeBlock* codeBlock = callFrame->codeBlock();
-    RegisterFile* registerFile = &callFrame->scopeChain()->globalObject()->globalData()->interpreter->registerFile();
+    RegisterFile* registerFile = &callFrame->scopeChain()->globalObject->globalData()->interpreter->registerFile();
     const Register* it;
     const Register* end;
     JSValue v;
@@ -577,7 +541,8 @@ NEVER_INLINE HandlerInfo* Interpreter::throwException(CallFrame*& callFrame, JSV
     Debugger* debugger = callFrame->dynamicGlobalObject()->debugger();
     if (debugger) {
         DebuggerCallFrame debuggerCallFrame(callFrame, exceptionValue);
-        debugger->exception(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->lineNumberForBytecodeOffset(callFrame, bytecodeOffset));
+        bool hasHandler = codeBlock->handlerForBytecodeOffset(bytecodeOffset);
+        debugger->exception(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->lineNumberForBytecodeOffset(callFrame, bytecodeOffset), hasHandler);
     }
 
     // If we throw in the middle of a call instruction, we need to notify
@@ -587,7 +552,7 @@ NEVER_INLINE HandlerInfo* Interpreter::throwException(CallFrame*& callFrame, JSV
 #if !ENABLE(JIT)
         if (isCallBytecode(codeBlock->instructions()[bytecodeOffset].u.opcode))
             profiler->didExecute(callFrame, callFrame->r(codeBlock->instructions()[bytecodeOffset + 2].u.operand).jsValue());
-        else if (codeBlock->instructions()[bytecodeOffset + 8].u.opcode == getOpcode(op_construct))
+        else if (codeBlock->instructions().size() > (bytecodeOffset + 8) && codeBlock->instructions()[bytecodeOffset + 8].u.opcode == getOpcode(op_construct))
             profiler->didExecute(callFrame, callFrame->r(codeBlock->instructions()[bytecodeOffset + 10].u.operand).jsValue());
 #else
         int functionRegisterIndex;
@@ -659,7 +624,7 @@ JSValue Interpreter::execute(ProgramExecutable* program, CallFrame* callFrame, S
         return jsNull();
     }
 
-    DynamicGlobalObjectScope globalObjectScope(callFrame, scopeChain->globalObject());
+    DynamicGlobalObjectScope globalObjectScope(callFrame, scopeChain->globalObject);
 
     JSGlobalObject* lastGlobalObject = m_registerFile.globalObject();
     JSGlobalObject* globalObject = callFrame->dynamicGlobalObject();
@@ -678,7 +643,7 @@ JSValue Interpreter::execute(ProgramExecutable* program, CallFrame* callFrame, S
 
     JSValue result;
     {
-        SamplingTool::CallRecord callRecord(m_sampler);
+        SamplingTool::CallRecord callRecord(m_sampler.get());
 
         m_reentryDepth++;
 #if ENABLE(JIT)
@@ -719,7 +684,7 @@ JSValue Interpreter::execute(FunctionExecutable* functionExecutable, CallFrame*
         return jsNull();
     }
 
-    DynamicGlobalObjectScope globalObjectScope(callFrame, callFrame->globalData().dynamicGlobalObject ? callFrame->globalData().dynamicGlobalObject : scopeChain->globalObject());
+    DynamicGlobalObjectScope globalObjectScope(callFrame, scopeChain->globalObject);
 
     CallFrame* newCallFrame = CallFrame::create(oldEnd);
     size_t dst = 0;
@@ -744,7 +709,7 @@ JSValue Interpreter::execute(FunctionExecutable* functionExecutable, CallFrame*
 
     JSValue result;
     {
-        SamplingTool::CallRecord callRecord(m_sampler);
+        SamplingTool::CallRecord callRecord(m_sampler.get());
 
         m_reentryDepth++;
 #if ENABLE(JIT)
@@ -812,7 +777,7 @@ JSValue Interpreter::execute(CallFrameClosure& closure, JSValue* exception)
     
     JSValue result;
     {
-        SamplingTool::CallRecord callRecord(m_sampler);
+        SamplingTool::CallRecord callRecord(m_sampler.get());
         
         m_reentryDepth++;
 #if ENABLE(JIT)
@@ -849,7 +814,7 @@ JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSObjec
         }
     }
 
-    DynamicGlobalObjectScope globalObjectScope(callFrame, callFrame->globalData().dynamicGlobalObject ? callFrame->globalData().dynamicGlobalObject : scopeChain->globalObject());
+    DynamicGlobalObjectScope globalObjectScope(callFrame, scopeChain->globalObject);
 
     EvalCodeBlock* codeBlock = &eval->bytecode(callFrame, scopeChain);
 
@@ -914,7 +879,7 @@ JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSObjec
 
     JSValue result;
     {
-        SamplingTool::CallRecord callRecord(m_sampler);
+        SamplingTool::CallRecord callRecord(m_sampler.get());
 
         m_reentryDepth++;
 #if ENABLE(JIT)
@@ -932,7 +897,7 @@ JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSObjec
     return result;
 }
 
-NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHookID, int firstLine, int lastLine, int column)
+NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHookID, int firstLine, int lastLine)
 {
     Debugger* debugger = callFrame->dynamicGlobalObject()->debugger();
     if (!debugger)
@@ -946,7 +911,7 @@ NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHook
             debugger->returnEvent(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), lastLine);
             return;
         case WillExecuteStatement:
-            debugger->atStatement(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), firstLine, column);
+            debugger->atStatement(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), firstLine);
             return;
         case WillExecuteProgram:
             debugger->willExecuteProgram(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), firstLine);
@@ -955,7 +920,7 @@ NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHook
             debugger->didExecuteProgram(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), lastLine);
             return;
         case DidReachBreakpoint:
-            debugger->didReachBreakpoint(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), lastLine, column);
+            debugger->didReachBreakpoint(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), lastLine);
             return;
     }
 }
@@ -963,10 +928,10 @@ NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHook
 #if USE(INTERPRETER)
 NEVER_INLINE ScopeChainNode* Interpreter::createExceptionScope(CallFrame* callFrame, const Instruction* vPC)
 {
-    int dst = (++vPC)->u.operand;
+    int dst = vPC[1].u.operand;
     CodeBlock* codeBlock = callFrame->codeBlock();
-    Identifier& property = codeBlock->identifier((++vPC)->u.operand);
-    JSValue value = callFrame->r((++vPC)->u.operand).jsValue();
+    Identifier& property = codeBlock->identifier(vPC[2].u.operand);
+    JSValue value = callFrame->r(vPC[3].u.operand).jsValue();
     JSObject* scope = new (callFrame) JSStaticScopeObject(callFrame, property, value, DontDelete);
     callFrame->r(dst) = JSValue(scope);
 
@@ -1018,22 +983,20 @@ NEVER_INLINE void Interpreter::tryCachePutByID(CallFrame* callFrame, CodeBlock*
         return;
     }
 
-    StructureChain* protoChain = structure->prototypeChain(callFrame);
-    if (!protoChain->isCacheable()) {
-        vPC[0] = getOpcode(op_put_by_id_generic);
-        return;
-    }
-
     // Structure transition, cache transition info
     if (slot.type() == PutPropertySlot::NewProperty) {
         if (structure->isDictionary()) {
             vPC[0] = getOpcode(op_put_by_id_generic);
             return;
         }
+
+        // put_by_id_transition checks the prototype chain for setters.
+        normalizePrototypeChain(callFrame, baseCell);
+
         vPC[0] = getOpcode(op_put_by_id_transition);
         vPC[4] = structure->previousID();
         vPC[5] = structure;
-        vPC[6] = protoChain;
+        vPC[6] = structure->prototypeChain(callFrame);
         vPC[7] = slot.cachedOffset();
         codeBlock->refStructures(vPC);
         return;
@@ -1111,41 +1074,46 @@ NEVER_INLINE void Interpreter::tryCacheGetByID(CallFrame* callFrame, CodeBlock*
         return;
     }
 
+    if (structure->isDictionary()) {
+        vPC[0] = getOpcode(op_get_by_id_generic);
+        return;
+    }
+
     if (slot.slotBase() == structure->prototypeForLookup(callFrame)) {
         ASSERT(slot.slotBase().isObject());
 
         JSObject* baseObject = asObject(slot.slotBase());
+        size_t offset = slot.cachedOffset();
 
         // Since we're accessing a prototype in a loop, it's a good bet that it
         // should not be treated as a dictionary.
-        if (baseObject->structure()->isDictionary())
-            baseObject->setStructure(Structure::fromDictionaryTransition(baseObject->structure()));
+        if (baseObject->structure()->isDictionary()) {
+            baseObject->flattenDictionaryObject();
+            offset = baseObject->structure()->get(propertyName);
+        }
+
+        ASSERT(!baseObject->structure()->isUncacheableDictionary());
 
         vPC[0] = getOpcode(op_get_by_id_proto);
         vPC[5] = baseObject->structure();
-        vPC[6] = slot.cachedOffset();
+        vPC[6] = offset;
 
         codeBlock->refStructures(vPC);
         return;
     }
 
-    size_t count = countPrototypeChainEntriesAndCheckForProxies(callFrame, baseValue, slot);
+    size_t offset = slot.cachedOffset();
+    size_t count = normalizePrototypeChain(callFrame, baseValue, slot.slotBase(), propertyName, offset);
     if (!count) {
         vPC[0] = getOpcode(op_get_by_id_generic);
         return;
     }
 
-    StructureChain* protoChain = structure->prototypeChain(callFrame);
-    if (!protoChain->isCacheable()) {
-        vPC[0] = getOpcode(op_get_by_id_generic);
-        return;
-    }
-
     vPC[0] = getOpcode(op_get_by_id_chain);
     vPC[4] = structure;
-    vPC[5] = protoChain;
+    vPC[5] = structure->prototypeChain(callFrame);
     vPC[6] = count;
-    vPC[7] = slot.cachedOffset();
+    vPC[7] = offset;
     codeBlock->refStructures(vPC);
 }
 
@@ -1162,16 +1130,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 {
     // One-time initialization of our address tables. We have to put this code
     // here because our labels are only in scope inside this function.
-    if (flag == InitializeAndReturn) {
+    if (UNLIKELY(flag == InitializeAndReturn)) {
         #if HAVE(COMPUTED_GOTO)
-            #define ADD_BYTECODE(id, length) m_opcodeTable[id] = &&id;
-                FOR_EACH_OPCODE_ID(ADD_BYTECODE);
-            #undef ADD_BYTECODE
-
-            #define ADD_OPCODE_ID(id, length) m_opcodeIDTable.add(&&id, id);
-                FOR_EACH_OPCODE_ID(ADD_OPCODE_ID);
-            #undef ADD_OPCODE_ID
-            ASSERT(m_opcodeIDTable.size() == numOpcodeIDs);
+            #define LIST_OPCODE_LABEL(id, length) &&id,
+                static Opcode labels[] = { FOR_EACH_OPCODE_ID(LIST_OPCODE_LABEL) };
+                for (size_t i = 0; i < sizeof(labels) / sizeof(Opcode); ++i)
+                    m_opcodeTable[i] = labels[i];
+            #undef LIST_OPCODE_LABEL
         #endif // HAVE(COMPUTED_GOTO)
         return JSValue();
     }
@@ -1249,10 +1214,10 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Constructs a new empty Object instance using the original
            constructor, and puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
         callFrame->r(dst) = JSValue(constructEmptyObject(callFrame));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_new_object);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_new_array) {
@@ -1263,13 +1228,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            The array will contain argCount elements with values
            taken from registers starting at register firstArg.
         */
-        int dst = (++vPC)->u.operand;
-        int firstArg = (++vPC)->u.operand;
-        int argCount = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int firstArg = vPC[2].u.operand;
+        int argCount = vPC[3].u.operand;
         ArgList args(callFrame->registers() + firstArg, argCount);
         callFrame->r(dst) = JSValue(constructArray(callFrame, args));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_new_array);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_new_regexp) {
@@ -1279,11 +1244,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            constructor from regexp regExp, and puts the result in
            register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int regExp = (++vPC)->u.operand;
-        callFrame->r(dst) = JSValue(new (globalData) RegExpObject(callFrame->scopeChain()->globalObject()->regExpStructure(), callFrame->codeBlock()->regexp(regExp)));
+        int dst = vPC[1].u.operand;
+        int regExp = vPC[2].u.operand;
+        callFrame->r(dst) = JSValue(new (globalData) RegExpObject(callFrame->scopeChain()->globalObject->regExpStructure(), callFrame->codeBlock()->regexp(regExp)));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_new_regexp);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_mov) {
@@ -1291,11 +1256,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
            Copies register src to register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         callFrame->r(dst) = callFrame->r(src);
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_mov);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_eq) {
@@ -1305,9 +1270,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            as with the ECMAScript '==' operator, and puts the result
            as a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         if (src1.isInt32() && src2.isInt32())
             callFrame->r(dst) = jsBoolean(src1.asInt32() == src2.asInt32());
         else {
@@ -1316,7 +1281,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_eq);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_eq_null) {
@@ -1325,17 +1290,17 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Checks whether register src is null, as with the ECMAScript '!='
            operator, and puts the result as a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
 
         if (src.isUndefinedOrNull()) {
             callFrame->r(dst) = jsBoolean(true);
-            ++vPC;
+            vPC += OPCODE_LENGTH(op_eq_null);
             NEXT_INSTRUCTION();
         }
         
         callFrame->r(dst) = jsBoolean(src.isCell() && src.asCell()->structure()->typeInfo().masqueradesAsUndefined());
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_eq_null);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_neq) {
@@ -1345,9 +1310,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            equal, as with the ECMAScript '!=' operator, and puts the
            result as a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         if (src1.isInt32() && src2.isInt32())
             callFrame->r(dst) = jsBoolean(src1.asInt32() != src2.asInt32());
         else {
@@ -1356,7 +1321,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_neq);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_neq_null) {
@@ -1365,17 +1330,17 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Checks whether register src is not null, as with the ECMAScript '!='
            operator, and puts the result as a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
 
         if (src.isUndefinedOrNull()) {
             callFrame->r(dst) = jsBoolean(false);
-            ++vPC;
+            vPC += OPCODE_LENGTH(op_neq_null);
             NEXT_INSTRUCTION();
         }
         
         callFrame->r(dst) = jsBoolean(!src.isCell() || !asCell(src)->structure()->typeInfo().masqueradesAsUndefined());
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_neq_null);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_stricteq) {
@@ -1385,12 +1350,12 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            equal, as with the ECMAScript '===' operator, and puts the
            result as a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        callFrame->r(dst) = jsBoolean(JSValue::strictEqual(src1, src2));
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
+        callFrame->r(dst) = jsBoolean(JSValue::strictEqual(callFrame, src1, src2));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_stricteq);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_nstricteq) {
@@ -1400,12 +1365,12 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            strictly equal, as with the ECMAScript '!==' operator, and
            puts the result as a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        callFrame->r(dst) = jsBoolean(!JSValue::strictEqual(src1, src2));
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
+        callFrame->r(dst) = jsBoolean(!JSValue::strictEqual(callFrame, src1, src2));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_nstricteq);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_less) {
@@ -1415,14 +1380,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            with the ECMAScript '<' operator, and puts the result as
            a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         JSValue result = jsBoolean(jsLess(callFrame, src1, src2));
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_less);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_lesseq) {
@@ -1432,14 +1397,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            register src2, as with the ECMAScript '<=' operator, and
            puts the result as a boolean in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         JSValue result = jsBoolean(jsLessEq(callFrame, src1, src2));
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_lesseq);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_pre_inc) {
@@ -1448,7 +1413,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Converts register srcDst to number, adds one, and puts the result
            back in register srcDst.
         */
-        int srcDst = (++vPC)->u.operand;
+        int srcDst = vPC[1].u.operand;
         JSValue v = callFrame->r(srcDst).jsValue();
         if (v.isInt32() && v.asInt32() < INT_MAX)
             callFrame->r(srcDst) = jsNumber(callFrame, v.asInt32() + 1);
@@ -1458,7 +1423,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(srcDst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_pre_inc);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_pre_dec) {
@@ -1467,7 +1432,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Converts register srcDst to number, subtracts one, and puts the result
            back in register srcDst.
         */
-        int srcDst = (++vPC)->u.operand;
+        int srcDst = vPC[1].u.operand;
         JSValue v = callFrame->r(srcDst).jsValue();
         if (v.isInt32() && v.asInt32() > INT_MIN)
             callFrame->r(srcDst) = jsNumber(callFrame, v.asInt32() - 1);
@@ -1477,7 +1442,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(srcDst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_pre_dec);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_post_inc) {
@@ -1487,8 +1452,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            written to register dst, and the number plus one is written
            back to register srcDst.
         */
-        int dst = (++vPC)->u.operand;
-        int srcDst = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int srcDst = vPC[2].u.operand;
         JSValue v = callFrame->r(srcDst).jsValue();
         if (v.isInt32() && v.asInt32() < INT_MAX) {
             callFrame->r(srcDst) = jsNumber(callFrame, v.asInt32() + 1);
@@ -1500,7 +1465,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = number;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_post_inc);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_post_dec) {
@@ -1510,8 +1475,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            written to register dst, and the number minus one is written
            back to register srcDst.
         */
-        int dst = (++vPC)->u.operand;
-        int srcDst = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int srcDst = vPC[2].u.operand;
         JSValue v = callFrame->r(srcDst).jsValue();
         if (v.isInt32() && v.asInt32() > INT_MIN) {
             callFrame->r(srcDst) = jsNumber(callFrame, v.asInt32() - 1);
@@ -1523,7 +1488,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = number;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_post_dec);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_to_jsnumber) {
@@ -1532,8 +1497,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Converts register src to number, and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
 
         JSValue srcVal = callFrame->r(src).jsValue();
 
@@ -1545,7 +1510,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_to_jsnumber);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_negate) {
@@ -1554,8 +1519,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Converts register src to number, negates it, and puts the
            result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
         if (src.isInt32() && src.asInt32())
             callFrame->r(dst) = jsNumber(callFrame, -src.asInt32());
         else {
@@ -1564,7 +1529,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_negate);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_add) {
@@ -1574,17 +1539,17 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            in register dst. (JS add may be string concatenation or
            numeric add, depending on the types of the operands.)
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | src2.asInt32() & 0xc0000000)) // no overflow
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
+        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
             callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() + src2.asInt32());
         else {
             JSValue result = jsAdd(callFrame, src1, src2);
             CHECK_FOR_EXCEPTION();
             callFrame->r(dst) = result;
         }
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_add);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_mul) {
@@ -1593,9 +1558,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Multiplies register src1 and register src2 (converted to
            numbers), and puts the product in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | src2.asInt32() >> 15)) // no overflow
                 callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() * src2.asInt32());
         else {
@@ -1604,7 +1569,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_mul);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_div) {
@@ -1614,15 +1579,15 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            register divisor (converted to number), and puts the
            quotient in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue dividend = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue divisor = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue dividend = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue divisor = callFrame->r(vPC[3].u.operand).jsValue();
 
         JSValue result = jsNumber(callFrame, dividend.toNumber(callFrame) / divisor.toNumber(callFrame));
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
 
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_div);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_mod) {
@@ -1632,15 +1597,15 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            register divisor (converted to number), and puts the
            remainder in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue dividend = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue divisor = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue dividend = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue divisor = callFrame->r(vPC[3].u.operand).jsValue();
 
         if (dividend.isInt32() && divisor.isInt32() && divisor.asInt32() != 0) {
             JSValue result = jsNumber(callFrame, dividend.asInt32() % divisor.asInt32());
             ASSERT(result);
             callFrame->r(dst) = result;
-            ++vPC;
+            vPC += OPCODE_LENGTH(op_mod);
             NEXT_INSTRUCTION();
         }
 
@@ -1651,7 +1616,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         JSValue result = jsNumber(callFrame, fmod(d1, d2));
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_mod);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_sub) {
@@ -1661,17 +1626,17 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            src1 (converted to number), and puts the difference in
            register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | src2.asInt32() & 0xc0000000)) // no overflow
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
+        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
             callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() - src2.asInt32());
         else {
             JSValue result = jsNumber(callFrame, src1.toNumber(callFrame) - src2.toNumber(callFrame));
             CHECK_FOR_EXCEPTION();
             callFrame->r(dst) = result;
         }
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_sub);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_lshift) {
@@ -1681,9 +1646,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            register shift (converted to uint32), and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue val = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue shift = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
 
         if (val.isInt32() && shift.isInt32())
             callFrame->r(dst) = jsNumber(callFrame, val.asInt32() << (shift.asInt32() & 0x1f));
@@ -1693,7 +1658,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_lshift);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_rshift) {
@@ -1703,9 +1668,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            to int32) by register shift (converted to
            uint32), and puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue val = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue shift = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
 
         if (val.isInt32() && shift.isInt32())
             callFrame->r(dst) = jsNumber(callFrame, val.asInt32() >> (shift.asInt32() & 0x1f));
@@ -1715,7 +1680,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_rshift);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_urshift) {
@@ -1725,9 +1690,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            to uint32) by register shift (converted to
            uint32), and puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue val = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue shift = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
         if (val.isUInt32() && shift.isInt32())
             callFrame->r(dst) = jsNumber(callFrame, val.asInt32() >> (shift.asInt32() & 0x1f));
         else {
@@ -1736,7 +1701,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_urshift);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_bitand) {
@@ -1746,9 +1711,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            and register src2 (converted to int32), and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         if (src1.isInt32() && src2.isInt32())
             callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() & src2.asInt32());
         else {
@@ -1757,7 +1722,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_bitand);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_bitxor) {
@@ -1767,9 +1732,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            and register src2 (converted to int32), and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         if (src1.isInt32() && src2.isInt32())
             callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() ^ src2.asInt32());
         else {
@@ -1778,7 +1743,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_bitxor);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_bitor) {
@@ -1788,9 +1753,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            and register src2 (converted to int32), and puts the
            result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
         if (src1.isInt32() && src2.isInt32())
             callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() | src2.asInt32());
         else {
@@ -1799,7 +1764,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = result;
         }
 
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_bitor);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_bitnot) {
@@ -1808,8 +1773,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Computes bitwise NOT of register src1 (converted to int32),
            and puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        JSValue src = callFrame->r((++vPC)->u.operand).jsValue();
+        int dst = vPC[1].u.operand;
+        JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
         if (src.isInt32())
             callFrame->r(dst) = jsNumber(callFrame, ~src.asInt32());
         else {
@@ -1817,7 +1782,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             CHECK_FOR_EXCEPTION();
             callFrame->r(dst) = result;
         }
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_bitnot);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_not) {
@@ -1826,13 +1791,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Computes logical NOT of register src (converted to
            boolean), and puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         JSValue result = jsBoolean(!callFrame->r(src).jsValue().toBoolean(callFrame));
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_not);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_instanceof) {
@@ -1862,7 +1827,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = jsBoolean(result);
 
-        vPC += 5;
+        vPC += OPCODE_LENGTH(op_instanceof);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_typeof) {
@@ -1871,11 +1836,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Determines the type string for src according to ECMAScript
            rules, and puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         callFrame->r(dst) = JSValue(jsTypeStringForValue(callFrame, callFrame->r(src).jsValue()));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_typeof);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_is_undefined) {
@@ -1885,12 +1850,12 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            the ECMAScript rules is "undefined", and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         JSValue v = callFrame->r(src).jsValue();
         callFrame->r(dst) = jsBoolean(v.isCell() ? v.asCell()->structure()->typeInfo().masqueradesAsUndefined() : v.isUndefined());
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_is_undefined);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_is_boolean) {
@@ -1900,11 +1865,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            the ECMAScript rules is "boolean", and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         callFrame->r(dst) = jsBoolean(callFrame->r(src).jsValue().isBoolean());
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_is_boolean);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_is_number) {
@@ -1914,11 +1879,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            the ECMAScript rules is "number", and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         callFrame->r(dst) = jsBoolean(callFrame->r(src).jsValue().isNumber());
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_is_number);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_is_string) {
@@ -1928,11 +1893,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            the ECMAScript rules is "string", and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         callFrame->r(dst) = jsBoolean(callFrame->r(src).jsValue().isString());
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_is_string);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_is_object) {
@@ -1942,11 +1907,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            the ECMAScript rules is "object", and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         callFrame->r(dst) = jsBoolean(jsIsObjectType(callFrame->r(src).jsValue()));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_is_object);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_is_function) {
@@ -1956,11 +1921,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            the ECMAScript rules is "function", and puts the result
            in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
         callFrame->r(dst) = jsBoolean(jsIsFunctionType(callFrame->r(src).jsValue()));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_is_function);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_in) {
@@ -1972,9 +1937,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Raises an exception if register constructor is not an
            object.
         */
-        int dst = (++vPC)->u.operand;
-        int property = (++vPC)->u.operand;
-        int base = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int property = vPC[2].u.operand;
+        int base = vPC[3].u.operand;
 
         JSValue baseVal = callFrame->r(base).jsValue();
         if (isInvalidParamForIn(callFrame, callFrame->codeBlock(), vPC, baseVal, exceptionValue))
@@ -1993,7 +1958,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             callFrame->r(dst) = jsBoolean(baseObj->hasProperty(callFrame, property));
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_in);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_resolve) {
@@ -2006,7 +1971,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (UNLIKELY(!resolve(callFrame, vPC, exceptionValue)))
             goto vm_throw;
 
-        vPC += 3;
+        vPC += OPCODE_LENGTH(op_resolve);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_resolve_skip) {
@@ -2019,7 +1984,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (UNLIKELY(!resolveSkip(callFrame, vPC, exceptionValue)))
             goto vm_throw;
 
-        vPC += 4;
+        vPC += OPCODE_LENGTH(op_resolve_skip);
 
         NEXT_INSTRUCTION();
     }
@@ -2034,7 +1999,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (UNLIKELY(!resolveGlobal(callFrame, vPC, exceptionValue)))
             goto vm_throw;
         
-        vPC += 6;
+        vPC += OPCODE_LENGTH(op_resolve_global);
         
         NEXT_INSTRUCTION();
     }
@@ -2043,13 +2008,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
            Gets the global var at global slot index and places it in register dst.
          */
-        int dst = (++vPC)->u.operand;
-        JSGlobalObject* scope = static_cast<JSGlobalObject*>((++vPC)->u.jsCell);
+        int dst = vPC[1].u.operand;
+        JSGlobalObject* scope = static_cast<JSGlobalObject*>(vPC[2].u.jsCell);
         ASSERT(scope->isGlobalObject());
-        int index = (++vPC)->u.operand;
+        int index = vPC[3].u.operand;
 
         callFrame->r(dst) = scope->registerAt(index);
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_get_global_var);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_put_global_var) {
@@ -2057,13 +2022,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
          
            Puts value into global slot index.
          */
-        JSGlobalObject* scope = static_cast<JSGlobalObject*>((++vPC)->u.jsCell);
+        JSGlobalObject* scope = static_cast<JSGlobalObject*>(vPC[1].u.jsCell);
         ASSERT(scope->isGlobalObject());
-        int index = (++vPC)->u.operand;
-        int value = (++vPC)->u.operand;
+        int index = vPC[2].u.operand;
+        int value = vPC[3].u.operand;
         
         scope->registerAt(index) = JSValue(callFrame->r(value).jsValue());
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_put_global_var);
         NEXT_INSTRUCTION();
     }            
     DEFINE_OPCODE(op_get_scoped_var) {
@@ -2072,9 +2037,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
          Loads the contents of the index-th local from the scope skip nodes from
          the top of the scope chain, and places it in register dst
          */
-        int dst = (++vPC)->u.operand;
-        int index = (++vPC)->u.operand;
-        int skip = (++vPC)->u.operand + callFrame->codeBlock()->needsFullScopeChain();
+        int dst = vPC[1].u.operand;
+        int index = vPC[2].u.operand;
+        int skip = vPC[3].u.operand + callFrame->codeBlock()->needsFullScopeChain();
 
         ScopeChainNode* scopeChain = callFrame->scopeChain();
         ScopeChainIterator iter = scopeChain->begin();
@@ -2088,16 +2053,16 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         ASSERT((*iter)->isVariableObject());
         JSVariableObject* scope = static_cast<JSVariableObject*>(*iter);
         callFrame->r(dst) = scope->registerAt(index);
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_get_scoped_var);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_put_scoped_var) {
         /* put_scoped_var index(n) skip(n) value(r)
 
          */
-        int index = (++vPC)->u.operand;
-        int skip = (++vPC)->u.operand + callFrame->codeBlock()->needsFullScopeChain();
-        int value = (++vPC)->u.operand;
+        int index = vPC[1].u.operand;
+        int skip = vPC[2].u.operand + callFrame->codeBlock()->needsFullScopeChain();
+        int value = vPC[3].u.operand;
 
         ScopeChainNode* scopeChain = callFrame->scopeChain();
         ScopeChainIterator iter = scopeChain->begin();
@@ -2111,7 +2076,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         ASSERT((*iter)->isVariableObject());
         JSVariableObject* scope = static_cast<JSVariableObject*>(*iter);
         scope->registerAt(index) = JSValue(callFrame->r(value).jsValue());
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_put_scoped_var);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_resolve_base) {
@@ -2124,7 +2089,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         */
         resolveBase(callFrame, vPC);
 
-        vPC += 3;
+        vPC += OPCODE_LENGTH(op_resolve_base);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_resolve_with_base) {
@@ -2142,7 +2107,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (UNLIKELY(!resolveBaseAndProperty(callFrame, vPC, exceptionValue)))
             goto vm_throw;
 
-        vPC += 4;
+        vPC += OPCODE_LENGTH(op_resolve_with_base);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_get_by_id) {
@@ -2165,7 +2130,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         tryCacheGetByID(callFrame, codeBlock, vPC, baseValue, ident, slot);
 
         callFrame->r(dst) = result;
-        vPC += 8;
+        vPC += OPCODE_LENGTH(op_get_by_id);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_get_by_id_self) {
@@ -2191,7 +2156,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                 ASSERT(baseObject->get(callFrame, callFrame->codeBlock()->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
                 callFrame->r(dst) = JSValue(baseObject->getDirectOffset(offset));
 
-                vPC += 8;
+                vPC += OPCODE_LENGTH(op_get_by_id_self);
                 NEXT_INSTRUCTION();
             }
         }
@@ -2223,9 +2188,10 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                     int offset = vPC[6].u.operand;
 
                     ASSERT(protoObject->get(callFrame, callFrame->codeBlock()->identifier(vPC[3].u.operand)) == protoObject->getDirectOffset(offset));
+                    ASSERT(baseValue.get(callFrame, callFrame->codeBlock()->identifier(vPC[3].u.operand)) == protoObject->getDirectOffset(offset));
                     callFrame->r(dst) = JSValue(protoObject->getDirectOffset(offset));
 
-                    vPC += 8;
+                    vPC += OPCODE_LENGTH(op_get_by_id_proto);
                     NEXT_INSTRUCTION();
                 }
             }
@@ -2238,14 +2204,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         // Polymorphic self access caching currently only supported when JITting.
         ASSERT_NOT_REACHED();
         // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
-        vPC += 8;
+        vPC += OPCODE_LENGTH(op_get_by_id_self_list);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_get_by_id_proto_list) {
         // Polymorphic prototype access caching currently only supported when JITting.
         ASSERT_NOT_REACHED();
         // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
-        vPC += 8;
+        vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_get_by_id_chain) {
@@ -2278,9 +2244,10 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                         int offset = vPC[7].u.operand;
 
                         ASSERT(baseObject->get(callFrame, callFrame->codeBlock()->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
+                        ASSERT(baseValue.get(callFrame, callFrame->codeBlock()->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
                         callFrame->r(dst) = JSValue(baseObject->getDirectOffset(offset));
 
-                        vPC += 8;
+                        vPC += OPCODE_LENGTH(op_get_by_id_chain);
                         NEXT_INSTRUCTION();
                     }
 
@@ -2310,7 +2277,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         CHECK_FOR_EXCEPTION();
 
         callFrame->r(dst) = result;
-        vPC += 8;
+        vPC += OPCODE_LENGTH(op_get_by_id_generic);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_get_array_length) {
@@ -2326,7 +2293,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (LIKELY(isJSArray(globalData, baseValue))) {
             int dst = vPC[1].u.operand;
             callFrame->r(dst) = jsNumber(callFrame, asArray(baseValue)->length());
-            vPC += 8;
+            vPC += OPCODE_LENGTH(op_get_array_length);
             NEXT_INSTRUCTION();
         }
 
@@ -2345,8 +2312,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         JSValue baseValue = callFrame->r(base).jsValue();
         if (LIKELY(isJSString(globalData, baseValue))) {
             int dst = vPC[1].u.operand;
-            callFrame->r(dst) = jsNumber(callFrame, asString(baseValue)->value().size());
-            vPC += 8;
+            callFrame->r(dst) = jsNumber(callFrame, asString(baseValue)->length());
+            vPC += OPCODE_LENGTH(op_get_string_length);
             NEXT_INSTRUCTION();
         }
 
@@ -2376,7 +2343,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
         tryCachePutByID(callFrame, codeBlock, vPC, baseValue, slot);
 
-        vPC += 8;
+        vPC += OPCODE_LENGTH(op_put_by_id);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_put_by_id_transition) {
@@ -2421,7 +2388,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                 ASSERT(baseObject->offsetForLocation(baseObject->getDirectLocation(callFrame->codeBlock()->identifier(vPC[2].u.operand))) == offset);
                 baseObject->putDirectOffset(offset, callFrame->r(value).jsValue());
 
-                vPC += 8;
+                vPC += OPCODE_LENGTH(op_put_by_id_transition);
                 NEXT_INSTRUCTION();
             }
         }
@@ -2456,7 +2423,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                 ASSERT(baseObject->offsetForLocation(baseObject->getDirectLocation(callFrame->codeBlock()->identifier(vPC[2].u.operand))) == offset);
                 baseObject->putDirectOffset(offset, callFrame->r(value).jsValue());
 
-                vPC += 8;
+                vPC += OPCODE_LENGTH(op_put_by_id_replace);
                 NEXT_INSTRUCTION();
             }
         }
@@ -2483,7 +2450,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         baseValue.put(callFrame, ident, callFrame->r(value).jsValue(), slot);
         CHECK_FOR_EXCEPTION();
 
-        vPC += 8;
+        vPC += OPCODE_LENGTH(op_put_by_id_generic);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_del_by_id) {
@@ -2494,16 +2461,43 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            boolean indicating success (if true) or failure (if false)
            to register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int base = (++vPC)->u.operand;
-        int property = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int base = vPC[2].u.operand;
+        int property = vPC[3].u.operand;
 
         JSObject* baseObj = callFrame->r(base).jsValue().toObject(callFrame);
         Identifier& ident = callFrame->codeBlock()->identifier(property);
         JSValue result = jsBoolean(baseObj->deleteProperty(callFrame, ident));
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_del_by_id);
+        NEXT_INSTRUCTION();
+    }
+    DEFINE_OPCODE(op_get_by_pname) {
+        int dst = vPC[1].u.operand;
+        int base = vPC[2].u.operand;
+        int property = vPC[3].u.operand;
+        int expected = vPC[4].u.operand;
+        int iter = vPC[5].u.operand;
+        int i = vPC[6].u.operand;
+
+        JSValue baseValue = callFrame->r(base).jsValue();
+        JSPropertyNameIterator* it = callFrame->r(iter).propertyNameIterator();
+        JSValue subscript = callFrame->r(property).jsValue();
+        JSValue expectedSubscript = callFrame->r(expected).jsValue();
+        int index = callFrame->r(i).i() - 1;
+        JSValue result;
+        int offset = 0;
+        if (subscript == expectedSubscript && baseValue.isCell() && (baseValue.asCell()->structure() == it->cachedStructure()) && it->getOffset(index, offset)) {
+            callFrame->r(dst) = asObject(baseValue)->getDirectOffset(offset);
+            vPC += OPCODE_LENGTH(op_get_by_pname);
+            NEXT_INSTRUCTION();
+        }
+        Identifier propertyName(callFrame, subscript.toString(callFrame));
+        result = baseValue.get(callFrame, propertyName);
+        CHECK_FOR_EXCEPTION();
+        callFrame->r(dst) = result;
+        vPC += OPCODE_LENGTH(op_get_by_pname);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_get_by_val) {
@@ -2514,9 +2508,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            in register dst. property is nominally converted to string
            but numbers are treated more efficiently.
         */
-        int dst = (++vPC)->u.operand;
-        int base = (++vPC)->u.operand;
-        int property = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int base = vPC[2].u.operand;
+        int property = vPC[3].u.operand;
         
         JSValue baseValue = callFrame->r(base).jsValue();
         JSValue subscript = callFrame->r(property).jsValue();
@@ -2532,7 +2526,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                 else
                     result = jsArray->JSArray::get(callFrame, i);
             } else if (isJSString(globalData, baseValue) && asString(baseValue)->canGetIndex(i))
-                result = asString(baseValue)->getIndex(&callFrame->globalData(), i);
+                result = asString(baseValue)->getIndex(callFrame, i);
             else if (isJSByteArray(globalData, baseValue) && asByteArray(baseValue)->canAccessIndex(i))
                 result = asByteArray(baseValue)->getIndex(callFrame, i);
             else
@@ -2544,7 +2538,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_get_by_val);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_put_by_val) {
@@ -2558,9 +2552,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Unlike many opcodes, this one does not write any output to
            the register file.
         */
-        int base = (++vPC)->u.operand;
-        int property = (++vPC)->u.operand;
-        int value = (++vPC)->u.operand;
+        int base = vPC[1].u.operand;
+        int property = vPC[2].u.operand;
+        int value = vPC[3].u.operand;
 
         JSValue baseValue = callFrame->r(base).jsValue();
         JSValue subscript = callFrame->r(property).jsValue();
@@ -2594,7 +2588,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         }
 
         CHECK_FOR_EXCEPTION();
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_put_by_val);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_del_by_val) {
@@ -2605,9 +2599,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            boolean indicating success (if true) or failure (if false)
            to register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int base = (++vPC)->u.operand;
-        int property = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int base = vPC[2].u.operand;
+        int property = vPC[3].u.operand;
 
         JSObject* baseObj = callFrame->r(base).jsValue().toObject(callFrame); // may throw
 
@@ -2625,7 +2619,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
         CHECK_FOR_EXCEPTION();
         callFrame->r(dst) = result;
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_del_by_val);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_put_by_index) {
@@ -2640,13 +2634,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
            This opcode is mainly used to initialize array literals.
         */
-        int base = (++vPC)->u.operand;
-        unsigned property = (++vPC)->u.operand;
-        int value = (++vPC)->u.operand;
+        int base = vPC[1].u.operand;
+        unsigned property = vPC[2].u.operand;
+        int value = vPC[3].u.operand;
 
         callFrame->r(base).jsValue().put(callFrame, property, callFrame->r(value).jsValue());
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_put_by_index);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_loop) {
@@ -2661,7 +2655,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 #if ENABLE(OPCODE_STATS)
         OpcodeStats::resetLastInstruction();
 #endif
-        int target = (++vPC)->u.operand;
+        int target = vPC[1].u.operand;
         CHECK_FOR_TIMEOUT();
         vPC += target;
         NEXT_INSTRUCTION();
@@ -2675,7 +2669,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 #if ENABLE(OPCODE_STATS)
         OpcodeStats::resetLastInstruction();
 #endif
-        int target = (++vPC)->u.operand;
+        int target = vPC[1].u.operand;
 
         vPC += target;
         NEXT_INSTRUCTION();
@@ -2689,15 +2683,35 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Additionally this loop instruction may terminate JS execution is
            the JS timeout is reached.
          */
-        int cond = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
+        int cond = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
         if (callFrame->r(cond).jsValue().toBoolean(callFrame)) {
             vPC += target;
             CHECK_FOR_TIMEOUT();
             NEXT_INSTRUCTION();
         }
         
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_loop_if_true);
+        NEXT_INSTRUCTION();
+    }
+    DEFINE_OPCODE(op_loop_if_false) {
+        /* loop_if_true cond(r) target(offset)
+         
+           Jumps to offset target from the current instruction, if and
+           only if register cond converts to boolean as false.
+
+           Additionally this loop instruction may terminate JS execution is
+           the JS timeout is reached.
+         */
+        int cond = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
+        if (!callFrame->r(cond).jsValue().toBoolean(callFrame)) {
+            vPC += target;
+            CHECK_FOR_TIMEOUT();
+            NEXT_INSTRUCTION();
+        }
+        
+        vPC += OPCODE_LENGTH(op_loop_if_true);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jtrue) {
@@ -2706,14 +2720,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Jumps to offset target from the current instruction, if and
            only if register cond converts to boolean as true.
         */
-        int cond = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
+        int cond = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
         if (callFrame->r(cond).jsValue().toBoolean(callFrame)) {
             vPC += target;
             NEXT_INSTRUCTION();
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_jtrue);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jfalse) {
@@ -2722,14 +2736,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Jumps to offset target from the current instruction, if and
            only if register cond converts to boolean as false.
         */
-        int cond = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
+        int cond = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
         if (!callFrame->r(cond).jsValue().toBoolean(callFrame)) {
             vPC += target;
             NEXT_INSTRUCTION();
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_jfalse);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jeq_null) {
@@ -2738,8 +2752,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Jumps to offset target from the current instruction, if and
            only if register src is null.
         */
-        int src = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
+        int src = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
         JSValue srcValue = callFrame->r(src).jsValue();
 
         if (srcValue.isUndefinedOrNull() || (srcValue.isCell() && srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
@@ -2747,7 +2761,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             NEXT_INSTRUCTION();
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_jeq_null);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jneq_null) {
@@ -2756,16 +2770,16 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Jumps to offset target from the current instruction, if and
            only if register src is not null.
         */
-        int src = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
+        int src = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
         JSValue srcValue = callFrame->r(src).jsValue();
 
-        if (!srcValue.isUndefinedOrNull() || (srcValue.isCell() && !srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
+        if (!srcValue.isUndefinedOrNull() && (!srcValue.isCell() || !srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
             vPC += target;
             NEXT_INSTRUCTION();
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_jneq_null);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jneq_ptr) {
@@ -2774,16 +2788,16 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Jumps to offset target from the current instruction, if the value r is equal
            to ptr, using pointer equality.
          */
-        int src = (++vPC)->u.operand;
-        JSValue ptr = JSValue((++vPC)->u.jsCell);
-        int target = (++vPC)->u.operand;
+        int src = vPC[1].u.operand;
+        JSValue ptr = JSValue(vPC[2].u.jsCell);
+        int target = vPC[3].u.operand;
         JSValue srcValue = callFrame->r(src).jsValue();
         if (srcValue != ptr) {
             vPC += target;
             NEXT_INSTRUCTION();
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_jneq_ptr);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_loop_if_less) {
@@ -2797,9 +2811,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Additionally this loop instruction may terminate JS execution is
            the JS timeout is reached.
          */
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        int target = (++vPC)->u.operand;
+        JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
+        int target = vPC[3].u.operand;
         
         bool result = jsLess(callFrame, src1, src2);
         CHECK_FOR_EXCEPTION();
@@ -2810,7 +2824,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             NEXT_INSTRUCTION();
         }
         
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_loop_if_less);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_loop_if_lesseq) {
@@ -2824,9 +2838,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Additionally this loop instruction may terminate JS execution is
            the JS timeout is reached.
         */
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        int target = (++vPC)->u.operand;
+        JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
+        int target = vPC[3].u.operand;
         
         bool result = jsLessEq(callFrame, src1, src2);
         CHECK_FOR_EXCEPTION();
@@ -2837,7 +2851,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             NEXT_INSTRUCTION();
         }
         
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_loop_if_lesseq);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jnless) {
@@ -2848,9 +2862,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            target from the current instruction, if and only if the 
            result of the comparison is false.
         */
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        int target = (++vPC)->u.operand;
+        JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
+        int target = vPC[3].u.operand;
 
         bool result = jsLess(callFrame, src1, src2);
         CHECK_FOR_EXCEPTION();
@@ -2860,7 +2874,30 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             NEXT_INSTRUCTION();
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_jnless);
+        NEXT_INSTRUCTION();
+    }
+    DEFINE_OPCODE(op_jless) {
+        /* jless src1(r) src2(r) target(offset)
+
+           Checks whether register src1 is less than register src2, as
+           with the ECMAScript '<' operator, and then jumps to offset
+           target from the current instruction, if and only if the 
+           result of the comparison is true.
+        */
+        JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
+        int target = vPC[3].u.operand;
+
+        bool result = jsLess(callFrame, src1, src2);
+        CHECK_FOR_EXCEPTION();
+        
+        if (result) {
+            vPC += target;
+            NEXT_INSTRUCTION();
+        }
+
+        vPC += OPCODE_LENGTH(op_jless);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jnlesseq) {
@@ -2871,9 +2908,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            and then jumps to offset target from the current instruction,
            if and only if theresult of the comparison is false.
         */
-        JSValue src1 = callFrame->r((++vPC)->u.operand).jsValue();
-        JSValue src2 = callFrame->r((++vPC)->u.operand).jsValue();
-        int target = (++vPC)->u.operand;
+        JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
+        int target = vPC[3].u.operand;
 
         bool result = jsLessEq(callFrame, src1, src2);
         CHECK_FOR_EXCEPTION();
@@ -2883,7 +2920,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             NEXT_INSTRUCTION();
         }
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_jnlesseq);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_switch_imm) {
@@ -2895,9 +2932,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            table, and the value at jumpTable[scrutinee value] is non-zero, then
            that value is used as the jump offset, otherwise defaultOffset is used.
          */
-        int tableIndex = (++vPC)->u.operand;
-        int defaultOffset = (++vPC)->u.operand;
-        JSValue scrutinee = callFrame->r((++vPC)->u.operand).jsValue();
+        int tableIndex = vPC[1].u.operand;
+        int defaultOffset = vPC[2].u.operand;
+        JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
         if (scrutinee.isInt32())
             vPC += callFrame->codeBlock()->immediateSwitchJumpTable(tableIndex).offsetForValue(scrutinee.asInt32(), defaultOffset);
         else {
@@ -2919,13 +2956,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            table, and the value at jumpTable[scrutinee value] is non-zero, then
            that value is used as the jump offset, otherwise defaultOffset is used.
          */
-        int tableIndex = (++vPC)->u.operand;
-        int defaultOffset = (++vPC)->u.operand;
-        JSValue scrutinee = callFrame->r((++vPC)->u.operand).jsValue();
+        int tableIndex = vPC[1].u.operand;
+        int defaultOffset = vPC[2].u.operand;
+        JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
         if (!scrutinee.isString())
             vPC += defaultOffset;
         else {
-            UString::Rep* value = asString(scrutinee)->value().rep();
+            UString::Rep* value = asString(scrutinee)->value(callFrame).rep();
             if (value->size() != 1)
                 vPC += defaultOffset;
             else
@@ -2942,13 +2979,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            jump table, then the value associated with the string is used as the 
            jump offset, otherwise defaultOffset is used.
          */
-        int tableIndex = (++vPC)->u.operand;
-        int defaultOffset = (++vPC)->u.operand;
-        JSValue scrutinee = callFrame->r((++vPC)->u.operand).jsValue();
+        int tableIndex = vPC[1].u.operand;
+        int defaultOffset = vPC[2].u.operand;
+        JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
         if (!scrutinee.isString())
             vPC += defaultOffset;
         else 
-            vPC += callFrame->codeBlock()->stringSwitchJumpTable(tableIndex).offsetForValue(asString(scrutinee)->value().rep(), defaultOffset);
+            vPC += callFrame->codeBlock()->stringSwitchJumpTable(tableIndex).offsetForValue(asString(scrutinee)->value(callFrame).rep(), defaultOffset);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_new_func) {
@@ -2959,12 +2996,12 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            constructor, using the rules for function declarations, and
            puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int func = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int func = vPC[2].u.operand;
 
         callFrame->r(dst) = JSValue(callFrame->codeBlock()->functionDecl(func)->make(callFrame, callFrame->scopeChain()));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_new_func);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_new_func_exp) {
@@ -2975,8 +3012,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            constructor, using the rules for function expressions, and
            puts the result in register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int funcIndex = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int funcIndex = vPC[2].u.operand;
 
         FunctionExecutable* function = callFrame->codeBlock()->functionExpr(funcIndex);
         JSFunction* func = function->make(callFrame, callFrame->scopeChain());
@@ -2995,7 +3032,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
         callFrame->r(dst) = JSValue(func);
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_new_func_exp);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_call_eval) {
@@ -3020,7 +3057,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         Register* newCallFrame = callFrame->registers() + registerOffset;
         Register* argv = newCallFrame - RegisterFile::CallFrameHeaderSize - argCount;
         JSValue thisValue = argv[0].jsValue();
-        JSGlobalObject* globalObject = callFrame->scopeChain()->globalObject();
+        JSGlobalObject* globalObject = callFrame->scopeChain()->globalObject;
 
         if (thisValue == globalObject && funcVal == globalObject->evalFunction()) {
             JSValue result = callEval(callFrame, registerFile, argv, argCount, registerOffset, exceptionValue);
@@ -3028,7 +3065,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                 goto vm_throw;
             callFrame->r(dst) = result;
 
-            vPC += 5;
+            vPC += OPCODE_LENGTH(op_call_eval);
             NEXT_INSTRUCTION();
         }
 
@@ -3088,7 +3125,6 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 #else
             newCallFrame->init(0, vPC + 5, scopeChain, callFrame, dst, argCount, asObject(v));
 #endif
-
             Register* thisRegister = newCallFrame->registers() - RegisterFile::CallFrameHeaderSize - argCount;
             ArgList args(thisRegister + 1, argCount - 1);
 
@@ -3099,14 +3135,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
             JSValue returnValue;
             {
-                SamplingTool::HostCallRecord callRecord(m_sampler);
+                SamplingTool::HostCallRecord callRecord(m_sampler.get());
                 returnValue = callData.native.function(newCallFrame, asObject(v), thisValue, args);
             }
             CHECK_FOR_EXCEPTION();
 
             callFrame->r(dst) = returnValue;
 
-            vPC += 5;
+            vPC += OPCODE_LENGTH(op_call);
             NEXT_INSTRUCTION();
         }
 
@@ -3116,8 +3152,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         goto vm_throw;
     }
     DEFINE_OPCODE(op_load_varargs) {
-        int argCountDst = (++vPC)->u.operand;
-        int argsOffset = (++vPC)->u.operand;
+        int argCountDst = vPC[1].u.operand;
+        int argsOffset = vPC[2].u.operand;
         
         JSValue arguments = callFrame->r(argsOffset).jsValue();
         int32_t argCount = 0;
@@ -3189,7 +3225,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         }
         CHECK_FOR_EXCEPTION();
         callFrame->r(argCountDst) = Register::withInt(argCount + 1);
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_load_varargs);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_call_varargs) {
@@ -3246,7 +3282,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 #else
             newCallFrame->init(0, vPC + 5, scopeChain, callFrame, dst, argCount, asObject(v));
 #endif
-
+            
             Register* thisRegister = newCallFrame->registers() - RegisterFile::CallFrameHeaderSize - argCount;
             ArgList args(thisRegister + 1, argCount - 1);
             
@@ -3257,14 +3293,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             
             JSValue returnValue;
             {
-                SamplingTool::HostCallRecord callRecord(m_sampler);
+                SamplingTool::HostCallRecord callRecord(m_sampler.get());
                 returnValue = callData.native.function(newCallFrame, asObject(v), thisValue, args);
             }
             CHECK_FOR_EXCEPTION();
             
             callFrame->r(dst) = returnValue;
             
-            vPC += 5;
+            vPC += OPCODE_LENGTH(op_call_varargs);
             NEXT_INSTRUCTION();
         }
         
@@ -3286,12 +3322,12 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            This opcode should only be used immediately before op_ret.
         */
 
-        int src = (++vPC)->u.operand;
+        int src = vPC[1].u.operand;
         ASSERT(callFrame->codeBlock()->needsFullScopeChain());
 
         asActivation(callFrame->r(src).jsValue())->copyRegisters(callFrame->optionalCalleeArguments());
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_tear_off_activation);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_tear_off_arguments) {
@@ -3312,7 +3348,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (callFrame->optionalCalleeArguments())
             callFrame->optionalCalleeArguments()->copyRegisters();
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_tear_off_arguments);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_ret) {
@@ -3330,22 +3366,21 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         intptr_t sourceId = callFrame->codeBlock()->source()->asID();
 #endif
 
-        int result = (++vPC)->u.operand;
+        int result = vPC[1].u.operand;
 
         if (callFrame->codeBlock()->needsFullScopeChain())
             callFrame->scopeChain()->deref();
 
         JSValue returnValue = callFrame->r(result).jsValue();
 #ifdef QT_BUILD_SCRIPT_LIB
-        if (debugger) {
+        if (debugger)
             debugger->functionExit(returnValue, sourceId);
-        }
 #endif
 
         vPC = callFrame->returnPC();
         int dst = callFrame->returnValueRegister();
         callFrame = callFrame->callerFrame();
-
+        
         if (callFrame->hasHostCallFrameFlag())
             return returnValue;
 
@@ -3370,7 +3405,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         for (size_t count = codeBlock->m_numVars; i < count; ++i)
             callFrame->r(i) = jsUndefined();
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_enter);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_enter_with_activation) {
@@ -3392,12 +3427,12 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         for (size_t count = codeBlock->m_numVars; i < count; ++i)
             callFrame->r(i) = jsUndefined();
 
-        int dst = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
         JSActivation* activation = new (globalData) JSActivation(callFrame, static_cast<FunctionExecutable*>(codeBlock->ownerExecutable()));
         callFrame->r(dst) = JSValue(activation);
         callFrame->setScopeChain(callFrame->scopeChain()->copy()->push(activation));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_enter_with_activation);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_convert_this) {
@@ -3412,12 +3447,12 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            block.
         */
 
-        int thisRegister = (++vPC)->u.operand;
+        int thisRegister = vPC[1].u.operand;
         JSValue thisVal = callFrame->r(thisRegister).jsValue();
         if (thisVal.needsThisConversion())
             callFrame->r(thisRegister) = JSValue(thisVal.toThisObject(callFrame));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_convert_this);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_init_arguments) {
@@ -3431,7 +3466,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            block.
          */
         callFrame->r(RegisterFile::ArgumentsRegister) = JSValue();
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_init_arguments);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_create_arguments) {
@@ -3447,7 +3482,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
              callFrame->setCalleeArguments(arguments);
              callFrame->r(RegisterFile::ArgumentsRegister) = JSValue(arguments);
          }
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_create_arguments);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_construct) {
@@ -3486,11 +3521,10 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             if (prototype.isObject())
                 structure = asObject(prototype)->inheritorID();
             else
-                structure = callDataScopeChain->globalObject()->emptyObjectStructure();
+                structure = callDataScopeChain->globalObject->emptyObjectStructure();
 #ifdef QT_BUILD_SCRIPT_LIB
             // ### world-class hack
-            QT_PREPEND_NAMESPACE(QScriptObject)* newObject
-                = new (globalData) QT_PREPEND_NAMESPACE(QScriptObject)(structure);
+            QT_PREPEND_NAMESPACE(QScriptObject)* newObject = new (globalData) QT_PREPEND_NAMESPACE(QScriptObject)(structure);
 #else
             JSObject* newObject = new (globalData) JSObject(structure);
 #endif
@@ -3519,7 +3553,6 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             ArgList args(callFrame->registers() + thisRegister + 1, argCount - 1);
 
             ScopeChainNode* scopeChain = callFrame->scopeChain();
-
             CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset);
 #ifdef QT_BUILD_SCRIPT_LIB //we need the returnValue to be 0 as it is used as flags
             newCallFrame->init(0, vPC + 7, scopeChain, callFrame, 0, argCount, asObject(v));
@@ -3529,13 +3562,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
             JSValue returnValue;
             {
-                SamplingTool::HostCallRecord callRecord(m_sampler);
+                SamplingTool::HostCallRecord callRecord(m_sampler.get());
                 returnValue = constructData.native.function(newCallFrame, asObject(v), args);
             }
             CHECK_FOR_EXCEPTION();
             callFrame->r(dst) = JSValue(returnValue);
 
-            vPC += 7;
+            vPC += OPCODE_LENGTH(op_construct);
             NEXT_INSTRUCTION();
         }
 
@@ -3553,32 +3586,33 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 
         int dst = vPC[1].u.operand;
         if (LIKELY(callFrame->r(dst).jsValue().isObject())) {
-            vPC += 3;
+            vPC += OPCODE_LENGTH(op_construct_verify);
             NEXT_INSTRUCTION();
         }
 
         int override = vPC[2].u.operand;
         callFrame->r(dst) = callFrame->r(override);
 
-        vPC += 3;
+        vPC += OPCODE_LENGTH(op_construct_verify);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_strcat) {
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
-        int count = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
+        int count = vPC[3].u.operand;
 
-        callFrame->r(dst) = concatenateStrings(callFrame, &callFrame->registers()[src], count);
-        ++vPC;
+        callFrame->r(dst) = jsString(callFrame, &callFrame->registers()[src], count);
+        CHECK_FOR_EXCEPTION();
+        vPC += OPCODE_LENGTH(op_strcat);
 
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_to_primitive) {
-        int dst = (++vPC)->u.operand;
-        int src = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int src = vPC[2].u.operand;
 
         callFrame->r(dst) = callFrame->r(src).jsValue().toPrimitive(callFrame);
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_to_primitive);
 
         NEXT_INSTRUCTION();
     }
@@ -3589,7 +3623,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            of the current scope chain.  The contents of the register scope
            are replaced by the result of toObject conversion of the scope.
         */
-        int scope = (++vPC)->u.operand;
+        int scope = vPC[1].u.operand;
         JSValue v = callFrame->r(scope).jsValue();
         JSObject* o = v.toObject(callFrame);
         CHECK_FOR_EXCEPTION();
@@ -3597,7 +3631,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         callFrame->r(scope) = JSValue(o);
         callFrame->setScopeChain(callFrame->scopeChain()->push(o));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_push_scope);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_pop_scope) {
@@ -3607,47 +3641,69 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         */
         callFrame->setScopeChain(callFrame->scopeChain()->pop());
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_pop_scope);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_get_pnames) {
-        /* get_pnames dst(r) base(r)
+        /* get_pnames dst(r) base(r) i(n) size(n) breakTarget(offset)
 
            Creates a property name list for register base and puts it
-           in register dst. This is not a true JavaScript value, just
-           a synthetic value used to keep the iteration state in a
-           register.
+           in register dst, initializing i and size for iteration. If
+           base is undefined or null, jumps to breakTarget.
         */
-        int dst = (++vPC)->u.operand;
-        int base = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int base = vPC[2].u.operand;
+        int i = vPC[3].u.operand;
+        int size = vPC[4].u.operand;
+        int breakTarget = vPC[5].u.operand;
+
+        JSValue v = callFrame->r(base).jsValue();
+        if (v.isUndefinedOrNull()) {
+            vPC += breakTarget;
+            NEXT_INSTRUCTION();
+        }
 
-        callFrame->r(dst) = JSPropertyNameIterator::create(callFrame, callFrame->r(base).jsValue());
-        ++vPC;
+        JSObject* o = v.toObject(callFrame);
+        Structure* structure = o->structure();
+        JSPropertyNameIterator* jsPropertyNameIterator = structure->enumerationCache();
+        if (!jsPropertyNameIterator || jsPropertyNameIterator->cachedPrototypeChain() != structure->prototypeChain(callFrame))
+            jsPropertyNameIterator = JSPropertyNameIterator::create(callFrame, o);
+
+        callFrame->r(dst) = jsPropertyNameIterator;
+        callFrame->r(base) = JSValue(o);
+        callFrame->r(i) = Register::withInt(0);
+        callFrame->r(size) = Register::withInt(jsPropertyNameIterator->size());
+        vPC += OPCODE_LENGTH(op_get_pnames);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_next_pname) {
-        /* next_pname dst(r) iter(r) target(offset)
+        /* next_pname dst(r) base(r) i(n) size(n) iter(r) target(offset)
 
-           Tries to copies the next name from property name list in
-           register iter. If there are names left, then copies one to
-           register dst, and jumps to offset target. If there are none
-           left, invalidates the iterator and continues to the next
+           Copies the next name from the property name list in
+           register iter to dst, then jumps to offset target. If there are no
+           names left, invalidates the iterator and continues to the next
            instruction.
         */
-        int dst = (++vPC)->u.operand;
-        int iter = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int base = vPC[2].u.operand;
+        int i = vPC[3].u.operand;
+        int size = vPC[4].u.operand;
+        int iter = vPC[5].u.operand;
+        int target = vPC[6].u.operand;
 
         JSPropertyNameIterator* it = callFrame->r(iter).propertyNameIterator();
-        if (JSValue temp = it->next(callFrame)) {
-            CHECK_FOR_TIMEOUT();
-            callFrame->r(dst) = JSValue(temp);
-            vPC += target;
-            NEXT_INSTRUCTION();
+        while (callFrame->r(i).i() != callFrame->r(size).i()) {
+            JSValue key = it->get(callFrame, asObject(callFrame->r(base).jsValue()), callFrame->r(i).i());
+            callFrame->r(i) = Register::withInt(callFrame->r(i).i() + 1);
+            if (key) {
+                CHECK_FOR_TIMEOUT();
+                callFrame->r(dst) = key;
+                vPC += target;
+                NEXT_INSTRUCTION();
+            }
         }
-        it->invalidate();
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_next_pname);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_jmp_scopes) {
@@ -3657,8 +3713,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            specified by immediate number count, then jumps to offset
            target.
         */
-        int count = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
+        int count = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
 
         ScopeChainNode* tmp = callFrame->scopeChain();
         while (count--)
@@ -3681,7 +3737,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
          */
         callFrame->setScopeChain(createExceptionScope(callFrame, vPC));
 
-        vPC += 4;
+        vPC += OPCODE_LENGTH(op_push_new_scope);
         NEXT_INSTRUCTION();
     }
 #if HAVE(COMPUTED_GOTO)
@@ -3706,11 +3762,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         }
 #endif
 
-        int ex = (++vPC)->u.operand;
+        int ex = vPC[1].u.operand;
         callFrame->r(ex) = exceptionValue;
         exceptionValue = JSValue();
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_catch);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_throw) {
@@ -3724,7 +3780,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            else the script returns control to the nearest native caller.
         */
 
-        int ex = (++vPC)->u.operand;
+        int ex = vPC[1].u.operand;
         exceptionValue = callFrame->r(ex).jsValue();
 
         handler = throwException(callFrame, exceptionValue, vPC - callFrame->codeBlock()->instructions().begin(), true);
@@ -3744,14 +3800,14 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            constant message as the message string. The result is
            written to register dst.
         */
-        int dst = (++vPC)->u.operand;
-        int type = (++vPC)->u.operand;
-        int message = (++vPC)->u.operand;
+        int dst = vPC[1].u.operand;
+        int type = vPC[2].u.operand;
+        int message = vPC[3].u.operand;
 
         CodeBlock* codeBlock = callFrame->codeBlock();
         callFrame->r(dst) = JSValue(Error::create(callFrame, (ErrorType)type, callFrame->r(message).jsValue().toString(callFrame), codeBlock->lineNumberForBytecodeOffset(callFrame, vPC - codeBlock->instructions().begin()), codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL()));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_new_error);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_end) {
@@ -3766,7 +3822,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
             ASSERT(scopeChain->refCount > 1);
             scopeChain->deref();
         }
-        int result = (++vPC)->u.operand;
+        int result = vPC[1].u.operand;
         return callFrame->r(result).jsValue();
     }
     DEFINE_OPCODE(op_put_getter) {
@@ -3780,9 +3836,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Unlike many opcodes, this one does not write any output to
            the register file.
         */
-        int base = (++vPC)->u.operand;
-        int property = (++vPC)->u.operand;
-        int function = (++vPC)->u.operand;
+        int base = vPC[1].u.operand;
+        int property = vPC[2].u.operand;
+        int function = vPC[3].u.operand;
 
         ASSERT(callFrame->r(base).jsValue().isObject());
         JSObject* baseObj = asObject(callFrame->r(base).jsValue());
@@ -3790,7 +3846,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         ASSERT(callFrame->r(function).jsValue().isObject());
         baseObj->defineGetter(callFrame, ident, asObject(callFrame->r(function).jsValue()));
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_put_getter);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_put_setter) {
@@ -3804,9 +3860,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Unlike many opcodes, this one does not write any output to
            the register file.
         */
-        int base = (++vPC)->u.operand;
-        int property = (++vPC)->u.operand;
-        int function = (++vPC)->u.operand;
+        int base = vPC[1].u.operand;
+        int property = vPC[2].u.operand;
+        int function = vPC[3].u.operand;
 
         ASSERT(callFrame->r(base).jsValue().isObject());
         JSObject* baseObj = asObject(callFrame->r(base).jsValue());
@@ -3814,7 +3870,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         ASSERT(callFrame->r(function).jsValue().isObject());
         baseObj->defineSetter(callFrame, ident, asObject(callFrame->r(function).jsValue()), 0);
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_put_setter);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_method_check) {
@@ -3827,9 +3883,9 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
            Places the address of the next instruction into the retAddrDst
            register and jumps to offset target from the current instruction.
         */
-        int retAddrDst = (++vPC)->u.operand;
-        int target = (++vPC)->u.operand;
-        callFrame->r(retAddrDst) = vPC + 1;
+        int retAddrDst = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
+        callFrame->r(retAddrDst) = vPC + OPCODE_LENGTH(op_jsr);
 
         vPC += target;
         NEXT_INSTRUCTION();
@@ -3841,24 +3897,23 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
          differs from op_jmp because the target address is stored in a
          register, not as an immediate.
         */
-        int retAddrSrc = (++vPC)->u.operand;
+        int retAddrSrc = vPC[1].u.operand;
         vPC = callFrame->r(retAddrSrc).vPC();
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_debug) {
-        /* debug debugHookID(n) firstLine(n) lastLine(n) columnNumber(n)
+        /* debug debugHookID(n) firstLine(n) lastLine(n)
 
          Notifies the debugger of the current state of execution. This opcode
          is only generated while the debugger is attached.
         */
-        int debugHookID = (++vPC)->u.operand;
-        int firstLine = (++vPC)->u.operand;
-        int lastLine = (++vPC)->u.operand;
-        int column = (++vPC)->u.operand;
+        int debugHookID = vPC[1].u.operand;
+        int firstLine = vPC[2].u.operand;
+        int lastLine = vPC[3].u.operand;
 
-        debug(callFrame, static_cast<DebugHookID>(debugHookID), firstLine, lastLine, column);
+        debug(callFrame, static_cast<DebugHookID>(debugHookID), firstLine, lastLine);
 
-        ++vPC;
+        vPC += OPCODE_LENGTH(op_debug);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_profile_will_call) {
@@ -3872,7 +3927,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (*enabledProfilerReference)
             (*enabledProfilerReference)->willExecute(callFrame, callFrame->r(function).jsValue());
 
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_profile_will_call);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_profile_did_call) {
@@ -3886,7 +3941,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (*enabledProfilerReference)
             (*enabledProfilerReference)->didExecute(callFrame, callFrame->r(function).jsValue());
 
-        vPC += 2;
+        vPC += OPCODE_LENGTH(op_profile_did_call);
         NEXT_INSTRUCTION();
     }
     vm_throw: {
@@ -3992,4 +4047,40 @@ CallFrame* Interpreter::findFunctionCallFrame(CallFrame* callFrame, InternalFunc
     return 0;
 }
 
+void Interpreter::enableSampler()
+{
+#if ENABLE(OPCODE_SAMPLING)
+    if (!m_sampler) {
+        m_sampler.set(new SamplingTool(this));
+        m_sampler->setup();
+    }
+#endif
+}
+void Interpreter::dumpSampleData(ExecState* exec)
+{
+#if ENABLE(OPCODE_SAMPLING)
+    if (m_sampler)
+        m_sampler->dump(exec);
+#else
+    UNUSED_PARAM(exec);
+#endif
+}
+void Interpreter::startSampling()
+{
+#if ENABLE(SAMPLING_THREAD)
+    if (!m_sampleEntryDepth)
+        SamplingThread::start();
+
+    m_sampleEntryDepth++;
+#endif
+}
+void Interpreter::stopSampling()
+{
+#if ENABLE(SAMPLING_THREAD)
+    m_sampleEntryDepth--;
+    if (!m_sampleEntryDepth)
+        SamplingThread::stop();
+#endif
+}
+
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.h b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.h
index 157e0c7..e17b055 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.h
@@ -105,13 +105,15 @@ namespace JSC {
         
         void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
         
-        void setSampler(SamplingTool* sampler) { m_sampler = sampler; }
-        SamplingTool* sampler() { return m_sampler; }
+        SamplingTool* sampler() { return m_sampler.get(); }
 
         NEVER_INLINE JSValue callEval(CallFrame*, RegisterFile*, Register* argv, int argc, int registerOffset, JSValue& exceptionValue);
         NEVER_INLINE HandlerInfo* throwException(CallFrame*&, JSValue&, unsigned bytecodeOffset, bool);
-        NEVER_INLINE void debug(CallFrame*, DebugHookID, int firstLine, int lastLine, int column);
+        NEVER_INLINE void debug(CallFrame*, DebugHookID, int firstLine, int lastLine);
 
+        void dumpSampleData(ExecState* exec);
+        void startSampling();
+        void stopSampling();
     private:
         enum ExecutionFlag { Normal, InitializeAndReturn };
 
@@ -127,7 +129,6 @@ namespace JSC {
         NEVER_INLINE bool resolveGlobal(CallFrame*, Instruction*, JSValue& exceptionValue);
         NEVER_INLINE void resolveBase(CallFrame*, Instruction* vPC);
         NEVER_INLINE bool resolveBaseAndProperty(CallFrame*, Instruction*, JSValue& exceptionValue);
-        NEVER_INLINE bool resolveBaseAndFunc(CallFrame*, Instruction*, JSValue& exceptionValue);
         NEVER_INLINE ScopeChainNode* createExceptionScope(CallFrame*, const Instruction* vPC);
 
         void tryCacheGetByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const Identifier& propertyName, const PropertySlot&);
@@ -149,7 +150,9 @@ namespace JSC {
         
         bool isCallBytecode(Opcode opcode) { return opcode == getOpcode(op_call) || opcode == getOpcode(op_construct) || opcode == getOpcode(op_call_eval); }
 
-        SamplingTool* m_sampler;
+        void enableSampler();
+        int m_sampleEntryDepth;
+        OwnPtr<SamplingTool> m_sampler;
 
         int m_reentryDepth;
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Register.h b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Register.h
index ea1f849..3486fa7 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Register.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/Register.h
@@ -50,17 +50,18 @@ namespace JSC {
     class Register : public WTF::FastAllocBase {
     public:
         Register();
-        Register(JSValue);
 
+        Register(const JSValue&);
+        Register& operator=(const JSValue&);
         JSValue jsValue() const;
         
-        Register(JSActivation*);
-        Register(CallFrame*);
-        Register(CodeBlock*);
-        Register(JSObject*);
-        Register(JSPropertyNameIterator*);
-        Register(ScopeChainNode*);
-        Register(Instruction*);
+        Register& operator=(JSActivation*);
+        Register& operator=(CallFrame*);
+        Register& operator=(CodeBlock*);
+        Register& operator=(JSObject*);
+        Register& operator=(JSPropertyNameIterator*);
+        Register& operator=(ScopeChainNode*);
+        Register& operator=(Instruction*);
 
         int32_t i() const;
         JSActivation* activation() const;
@@ -74,12 +75,12 @@ namespace JSC {
 
         static Register withInt(int32_t i)
         {
-            return Register(i);
+            Register r;
+            r.u.i = i;
+            return r;
         }
 
     private:
-        Register(int32_t);
-
         union {
             int32_t i;
             EncodedJSValue value;
@@ -97,13 +98,25 @@ namespace JSC {
     ALWAYS_INLINE Register::Register()
     {
 #ifndef NDEBUG
-        u.value = JSValue::encode(JSValue());
+        *this = JSValue();
+#endif
+    }
+
+    ALWAYS_INLINE Register::Register(const JSValue& v)
+    {
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!v.isZombie());
 #endif
+        u.value = JSValue::encode(v);
     }
 
-    ALWAYS_INLINE Register::Register(JSValue v)
+    ALWAYS_INLINE Register& Register::operator=(const JSValue& v)
     {
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!v.isZombie());
+#endif
         u.value = JSValue::encode(v);
+        return *this;
     }
 
     ALWAYS_INLINE JSValue Register::jsValue() const
@@ -113,44 +126,46 @@ namespace JSC {
 
     // Interpreter functions
 
-    ALWAYS_INLINE Register::Register(JSActivation* activation)
+    ALWAYS_INLINE Register& Register::operator=(JSActivation* activation)
     {
         u.activation = activation;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(CallFrame* callFrame)
+    ALWAYS_INLINE Register& Register::operator=(CallFrame* callFrame)
     {
         u.callFrame = callFrame;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(CodeBlock* codeBlock)
+    ALWAYS_INLINE Register& Register::operator=(CodeBlock* codeBlock)
     {
         u.codeBlock = codeBlock;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(JSObject* object)
+    ALWAYS_INLINE Register& Register::operator=(JSObject* object)
     {
         u.object = object;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(Instruction* vPC)
+    ALWAYS_INLINE Register& Register::operator=(Instruction* vPC)
     {
         u.vPC = vPC;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(ScopeChainNode* scopeChain)
+    ALWAYS_INLINE Register& Register::operator=(ScopeChainNode* scopeChain)
     {
         u.scopeChain = scopeChain;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(JSPropertyNameIterator* propertyNameIterator)
+    ALWAYS_INLINE Register& Register::operator=(JSPropertyNameIterator* propertyNameIterator)
     {
         u.propertyNameIterator = propertyNameIterator;
-    }
-
-    ALWAYS_INLINE Register::Register(int32_t i)
-    {
-        u.i = i;
+        return *this;
     }
 
     ALWAYS_INLINE int32_t Register::i() const
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.cpp
index de5175e..939573b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.cpp
@@ -36,7 +36,7 @@ RegisterFile::~RegisterFile()
 #if HAVE(MMAP)
     munmap(reinterpret_cast<char*>(m_buffer), ((m_max - m_start) + m_maxGlobals) * sizeof(Register));
 #elif HAVE(VIRTUALALLOC)
-#if PLATFORM(WINCE)
+#if OS(WINCE)
     VirtualFree(m_buffer, DWORD(m_commitEnd) - DWORD(m_buffer), MEM_DECOMMIT);
 #endif
     VirtualFree(m_buffer, 0, MEM_RELEASE);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.h b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.h
index 0eeff0e..34e2504 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/interpreter/RegisterFile.h
@@ -176,7 +176,7 @@ namespace JSC {
     #if HAVE(MMAP)
         m_buffer = reinterpret_cast<Register*>(mmap(0, bufferLength, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, VM_TAG_FOR_REGISTERFILE_MEMORY, 0));
         if (m_buffer == MAP_FAILED) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
             fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
             fprintf(stderr, "Could not allocate register file: %d\n", errno);
@@ -186,7 +186,7 @@ namespace JSC {
     #elif HAVE(VIRTUALALLOC)
         m_buffer = static_cast<Register*>(VirtualAlloc(0, roundUpAllocationSize(bufferLength, commitSize), MEM_RESERVE, PAGE_READWRITE));
         if (!m_buffer) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
             fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
             fprintf(stderr, "Could not allocate register file: %d\n", errno);
@@ -196,7 +196,7 @@ namespace JSC {
         size_t committedSize = roundUpAllocationSize(maxGlobals * sizeof(Register), commitSize);
         void* commitCheck = VirtualAlloc(m_buffer, committedSize, MEM_COMMIT, PAGE_READWRITE);
         if (commitCheck != m_buffer) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
             fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
             fprintf(stderr, "Could not allocate register file: %d\n", errno);
@@ -242,7 +242,7 @@ namespace JSC {
         if (newEnd > m_commitEnd) {
             size_t size = roundUpAllocationSize(reinterpret_cast<char*>(newEnd) - reinterpret_cast<char*>(m_commitEnd), commitSize);
             if (!VirtualAlloc(m_commitEnd, size, MEM_COMMIT, PAGE_READWRITE)) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
                 fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
                 fprintf(stderr, "Could not allocate register file: %d\n", errno);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocator.h b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocator.h
index 3274fcc..1fb8ff7 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocator.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocator.h
@@ -26,6 +26,7 @@
 #ifndef ExecutableAllocator_h
 #define ExecutableAllocator_h
 
+#include <stddef.h> // for ptrdiff_t
 #include <limits>
 #include <wtf/Assertions.h>
 #include <wtf/PassRefPtr.h>
@@ -33,15 +34,21 @@
 #include <wtf/UnusedParam.h>
 #include <wtf/Vector.h>
 
-#if PLATFORM(IPHONE)
+#if OS(IPHONE_OS)
 #include <libkern/OSCacheControl.h>
 #include <sys/mman.h>
 #endif
 
-#if PLATFORM(SYMBIAN)
+#if OS(SYMBIAN)
 #include <e32std.h>
 #endif
 
+#if OS(WINCE)
+// From pkfuncs.h (private header file from the Platform Builder)
+#define CACHE_SYNC_ALL 0x07F
+extern "C" __declspec(dllimport) void CacheRangeFlush(LPVOID pAddr, DWORD dwLength, DWORD dwFlags);
+#endif
+
 #define JIT_ALLOCATOR_PAGE_SIZE (ExecutableAllocator::pageSize)
 #define JIT_ALLOCATOR_LARGE_ALLOC_SIZE (ExecutableAllocator::pageSize * 4)
 
@@ -78,6 +85,9 @@ private:
     struct Allocation {
         char* pages;
         size_t size;
+#if OS(SYMBIAN)
+        RChunk* chunk;
+#endif
     };
     typedef Vector<Allocation, 2> AllocationList;
 
@@ -176,22 +186,38 @@ public:
 #endif
 
 
-#if PLATFORM(X86) || PLATFORM(X86_64)
+#if CPU(X86) || CPU(X86_64)
     static void cacheFlush(void*, size_t)
     {
     }
-#elif PLATFORM(ARM_THUMB2) && PLATFORM(IPHONE)
+#elif CPU(ARM_THUMB2) && OS(IPHONE_OS)
     static void cacheFlush(void* code, size_t size)
     {
         sys_dcache_flush(code, size);
         sys_icache_invalidate(code, size);
     }
-#elif PLATFORM(SYMBIAN)
+#elif CPU(ARM_THUMB2) && OS(LINUX)
+    static void cacheFlush(void* code, size_t size)
+    {
+        asm volatile (
+            "push    {r7}\n"
+            "mov     r0, %0\n"
+            "mov     r1, %1\n"
+            "movw    r7, #0x2\n"
+            "movt    r7, #0xf\n"
+            "movs    r2, #0x0\n"
+            "svc     0x0\n"
+            "pop     {r7}\n"
+            :
+            : "r" (code), "r" (reinterpret_cast<char*>(code) + size)
+            : "r0", "r1", "r2");
+    }
+#elif OS(SYMBIAN)
     static void cacheFlush(void* code, size_t size)
     {
         User::IMB_Range(code, static_cast<char*>(code) + size);
     }
-#elif PLATFORM(ARM_TRADITIONAL) && PLATFORM(LINUX)
+#elif CPU(ARM_TRADITIONAL) && OS(LINUX)
     static void cacheFlush(void* code, size_t size)
     {
         asm volatile (
@@ -205,7 +231,12 @@ public:
             "pop     {r7}\n"
             :
             : "r" (code), "r" (reinterpret_cast<char*>(code) + size)
-            : "r0", "r1");
+            : "r0", "r1", "r2");
+    }
+#elif OS(WINCE)
+    static void cacheFlush(void* code, size_t size)
+    {
+        CacheRangeFlush(code, size, CACHE_SYNC_ALL);
     }
 #else
     #error "The cacheFlush support is missing on this platform."
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorFixedVMPool.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorFixedVMPool.cpp
index 7682b9c..dd1db4e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorFixedVMPool.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorFixedVMPool.cpp
@@ -29,7 +29,7 @@
 
 #include <errno.h>
 
-#if ENABLE(ASSEMBLER) && PLATFORM(MAC) && PLATFORM(X86_64)
+#if ENABLE(ASSEMBLER) && OS(DARWIN) && CPU(X86_64)
 
 #include "TCSpinLock.h"
 #include <mach/mach_init.h>
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorPosix.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorPosix.cpp
index 13a8626..2eb0c87 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorPosix.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorPosix.cpp
@@ -27,7 +27,7 @@
 
 #include "ExecutableAllocator.h"
 
-#if ENABLE(ASSEMBLER)
+#if ENABLE(ASSEMBLER) && OS(UNIX) && !OS(SYMBIAN)
 
 #include <sys/mman.h>
 #include <unistd.h>
@@ -35,7 +35,7 @@
 
 namespace JSC {
 
-#if !(PLATFORM(MAC) && PLATFORM(X86_64))
+#if !(OS(DARWIN) && !PLATFORM(QT) && CPU(X86_64))
 
 void ExecutableAllocator::intializePageSize()
 {
@@ -57,7 +57,7 @@ void ExecutablePool::systemRelease(const ExecutablePool::Allocation& alloc)
     ASSERT_UNUSED(result, !result);
 }
 
-#endif // !(PLATFORM(MAC) && PLATFORM(X86_64))
+#endif // !(OS(DARWIN) && !PLATFORM(QT) && CPU(X86_64))
 
 #if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
 void ExecutableAllocator::reprotectRegion(void* start, size_t size, ProtectionSeting setting)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorSymbian.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorSymbian.cpp
new file mode 100644
index 0000000..e82975c
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorSymbian.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, 
+ *  Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "config.h"
+
+#include "ExecutableAllocator.h"
+
+#if ENABLE(ASSEMBLER) && OS(SYMBIAN)
+
+#include <e32hal.h>
+#include <e32std.h>
+
+// Set the page size to 256 Kb to compensate for moving memory model limitation
+const size_t MOVING_MEM_PAGE_SIZE = 256 * 1024; 
+
+namespace JSC {
+
+void ExecutableAllocator::intializePageSize()
+{
+#if CPU(ARMV5_OR_LOWER)
+    // The moving memory model (as used in ARMv5 and earlier platforms)
+    // on Symbian OS limits the number of chunks for each process to 16. 
+    // To mitigate this limitation increase the pagesize to 
+    // allocate less of larger chunks.
+    ExecutableAllocator::pageSize = MOVING_MEM_PAGE_SIZE;
+#else
+    TInt page_size;
+    UserHal::PageSizeInBytes(page_size);
+    ExecutableAllocator::pageSize = page_size;
+#endif
+}
+
+ExecutablePool::Allocation ExecutablePool::systemAlloc(size_t n)
+{
+    RChunk* codeChunk = new RChunk();
+
+    TInt errorCode = codeChunk->CreateLocalCode(n, n);
+
+    char* allocation = reinterpret_cast<char*>(codeChunk->Base());
+    if (!allocation)
+        CRASH();
+    ExecutablePool::Allocation alloc = { allocation, n, codeChunk };
+    return alloc;
+}
+
+void ExecutablePool::systemRelease(const ExecutablePool::Allocation& alloc)
+{ 
+    alloc.chunk->Close();
+    delete alloc.chunk;
+}
+
+#if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
+#error "ASSEMBLER_WX_EXCLUSIVE not yet suported on this platform."
+#endif
+
+}
+
+#endif // HAVE(ASSEMBLER)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorWin.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorWin.cpp
index e6ac855..e38323c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorWin.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/ExecutableAllocatorWin.cpp
@@ -27,7 +27,7 @@
 
 #include "ExecutableAllocator.h"
 
-#if ENABLE(ASSEMBLER)
+#if ENABLE(ASSEMBLER) && OS(WINDOWS)
 
 #include "windows.h"
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.cpp
index ea8434e..c0da66d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.cpp
@@ -27,7 +27,7 @@
 #include "JIT.h"
 
 // This probably does not belong here; adding here for now as a quick Windows build fix.
-#if ENABLE(ASSEMBLER) && PLATFORM(X86) && !PLATFORM(MAC)
+#if ENABLE(ASSEMBLER) && CPU(X86) && !OS(MAC_OS_X)
 #include "MacroAssembler.h"
 JSC::MacroAssemblerX86Common::SSE2CheckState JSC::MacroAssemblerX86Common::s_sse2CheckState = NotCheckedSSE2;
 #endif
@@ -37,7 +37,6 @@ JSC::MacroAssemblerX86Common::SSE2CheckState JSC::MacroAssemblerX86Common::s_sse
 #include "CodeBlock.h"
 #include "Interpreter.h"
 #include "JITInlineMethods.h"
-#include "JITStubs.h"
 #include "JITStubCall.h"
 #include "JSArray.h"
 #include "JSFunction.h"
@@ -202,7 +201,6 @@ void JIT::privateCompileMainPass()
         DEFINE_BINARY_OP(op_less)
         DEFINE_BINARY_OP(op_lesseq)
         DEFINE_BINARY_OP(op_urshift)
-        DEFINE_UNARY_OP(op_get_pnames)
         DEFINE_UNARY_OP(op_is_boolean)
         DEFINE_UNARY_OP(op_is_function)
         DEFINE_UNARY_OP(op_is_number)
@@ -240,7 +238,9 @@ void JIT::privateCompileMainPass()
         DEFINE_OP(op_eq_null)
         DEFINE_OP(op_get_by_id)
         DEFINE_OP(op_get_by_val)
+        DEFINE_OP(op_get_by_pname)
         DEFINE_OP(op_get_global_var)
+        DEFINE_OP(op_get_pnames)
         DEFINE_OP(op_get_scoped_var)
         DEFINE_OP(op_instanceof)
         DEFINE_OP(op_jeq_null)
@@ -250,6 +250,7 @@ void JIT::privateCompileMainPass()
         DEFINE_OP(op_jneq_null)
         DEFINE_OP(op_jneq_ptr)
         DEFINE_OP(op_jnless)
+        DEFINE_OP(op_jless)
         DEFINE_OP(op_jnlesseq)
         DEFINE_OP(op_jsr)
         DEFINE_OP(op_jtrue)
@@ -258,6 +259,7 @@ void JIT::privateCompileMainPass()
         DEFINE_OP(op_loop_if_less)
         DEFINE_OP(op_loop_if_lesseq)
         DEFINE_OP(op_loop_if_true)
+        DEFINE_OP(op_loop_if_false)
         DEFINE_OP(op_lshift)
         DEFINE_OP(op_method_check)
         DEFINE_OP(op_mod)
@@ -385,14 +387,17 @@ void JIT::privateCompileSlowCases()
         DEFINE_SLOWCASE_OP(op_eq)
         DEFINE_SLOWCASE_OP(op_get_by_id)
         DEFINE_SLOWCASE_OP(op_get_by_val)
+        DEFINE_SLOWCASE_OP(op_get_by_pname)
         DEFINE_SLOWCASE_OP(op_instanceof)
         DEFINE_SLOWCASE_OP(op_jfalse)
         DEFINE_SLOWCASE_OP(op_jnless)
+        DEFINE_SLOWCASE_OP(op_jless)
         DEFINE_SLOWCASE_OP(op_jnlesseq)
         DEFINE_SLOWCASE_OP(op_jtrue)
         DEFINE_SLOWCASE_OP(op_loop_if_less)
         DEFINE_SLOWCASE_OP(op_loop_if_lesseq)
         DEFINE_SLOWCASE_OP(op_loop_if_true)
+        DEFINE_SLOWCASE_OP(op_loop_if_false)
         DEFINE_SLOWCASE_OP(op_lshift)
         DEFINE_SLOWCASE_OP(op_method_check)
         DEFINE_SLOWCASE_OP(op_mod)
@@ -489,21 +494,21 @@ JITCode JIT::privateCompile()
             ASSERT(record.type == SwitchRecord::Immediate || record.type == SwitchRecord::Character); 
             ASSERT(record.jumpTable.simpleJumpTable->branchOffsets.size() == record.jumpTable.simpleJumpTable->ctiOffsets.size());
 
-            record.jumpTable.simpleJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeIndex + 3 + record.defaultOffset]);
+            record.jumpTable.simpleJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeIndex + record.defaultOffset]);
 
             for (unsigned j = 0; j < record.jumpTable.simpleJumpTable->branchOffsets.size(); ++j) {
                 unsigned offset = record.jumpTable.simpleJumpTable->branchOffsets[j];
-                record.jumpTable.simpleJumpTable->ctiOffsets[j] = offset ? patchBuffer.locationOf(m_labels[bytecodeIndex + 3 + offset]) : record.jumpTable.simpleJumpTable->ctiDefault;
+                record.jumpTable.simpleJumpTable->ctiOffsets[j] = offset ? patchBuffer.locationOf(m_labels[bytecodeIndex + offset]) : record.jumpTable.simpleJumpTable->ctiDefault;
             }
         } else {
             ASSERT(record.type == SwitchRecord::String);
 
-            record.jumpTable.stringJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeIndex + 3 + record.defaultOffset]);
+            record.jumpTable.stringJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeIndex + record.defaultOffset]);
 
             StringJumpTable::StringOffsetTable::iterator end = record.jumpTable.stringJumpTable->offsetTable.end();            
             for (StringJumpTable::StringOffsetTable::iterator it = record.jumpTable.stringJumpTable->offsetTable.begin(); it != end; ++it) {
                 unsigned offset = it->second.branchOffset;
-                it->second.ctiOffset = offset ? patchBuffer.locationOf(m_labels[bytecodeIndex + 3 + offset]) : record.jumpTable.stringJumpTable->ctiDefault;
+                it->second.ctiOffset = offset ? patchBuffer.locationOf(m_labels[bytecodeIndex + offset]) : record.jumpTable.stringJumpTable->ctiDefault;
             }
         }
     }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.h b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.h
index fcbc45e..8e0c9ac 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JIT.h
@@ -38,6 +38,8 @@
 #define JIT_CLASS_ALIGNMENT
 #endif
 
+#define ASSERT_JIT_OFFSET(actual, expected) ASSERT_WITH_MESSAGE(actual == expected, "JIT Offset \"%s\" should be %d, not %d.\n", #expected, static_cast<int>(actual), static_cast<int>(expected));
+
 #include "CodeBlock.h"
 #include "Interpreter.h"
 #include "JITCode.h"
@@ -190,7 +192,7 @@ namespace JSC {
         // on x86/x86-64 it is ecx for performance reasons, since the
         // MacroAssembler will need to plant register swaps if it is not -
         // however the code will still function correctly.
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         static const RegisterID returnValueRegister = X86Registers::eax;
         static const RegisterID cachedResultRegister = X86Registers::eax;
         static const RegisterID firstArgumentRegister = X86Registers::edi;
@@ -208,7 +210,7 @@ namespace JSC {
         static const FPRegisterID fpRegT0 = X86Registers::xmm0;
         static const FPRegisterID fpRegT1 = X86Registers::xmm1;
         static const FPRegisterID fpRegT2 = X86Registers::xmm2;
-#elif PLATFORM(X86)
+#elif CPU(X86)
         static const RegisterID returnValueRegister = X86Registers::eax;
         static const RegisterID cachedResultRegister = X86Registers::eax;
         // On x86 we always use fastcall conventions = but on
@@ -226,7 +228,7 @@ namespace JSC {
         static const FPRegisterID fpRegT0 = X86Registers::xmm0;
         static const FPRegisterID fpRegT1 = X86Registers::xmm1;
         static const FPRegisterID fpRegT2 = X86Registers::xmm2;
-#elif PLATFORM(ARM_THUMB2)
+#elif CPU(ARM_THUMB2)
         static const RegisterID returnValueRegister = ARMRegisters::r0;
         static const RegisterID cachedResultRegister = ARMRegisters::r0;
         static const RegisterID firstArgumentRegister = ARMRegisters::r0;
@@ -242,14 +244,13 @@ namespace JSC {
         static const FPRegisterID fpRegT0 = ARMRegisters::d0;
         static const FPRegisterID fpRegT1 = ARMRegisters::d1;
         static const FPRegisterID fpRegT2 = ARMRegisters::d2;
-#elif PLATFORM(ARM_TRADITIONAL)
+#elif CPU(ARM_TRADITIONAL)
         static const RegisterID returnValueRegister = ARMRegisters::r0;
         static const RegisterID cachedResultRegister = ARMRegisters::r0;
         static const RegisterID firstArgumentRegister = ARMRegisters::r0;
 
         static const RegisterID timeoutCheckRegister = ARMRegisters::r5;
         static const RegisterID callFrameRegister = ARMRegisters::r4;
-        static const RegisterID ctiReturnRegister = ARMRegisters::r6;
 
         static const RegisterID regT0 = ARMRegisters::r0;
         static const RegisterID regT1 = ARMRegisters::r1;
@@ -386,6 +387,8 @@ namespace JSC {
 
         Address addressFor(unsigned index, RegisterID base = callFrameRegister);
 
+        void testPrototype(Structure*, JumpList& failureCases);
+
 #if USE(JSVALUE32_64)
         Address tagFor(unsigned index, RegisterID base = callFrameRegister);
         Address payloadFor(unsigned index, RegisterID base = callFrameRegister);
@@ -425,6 +428,7 @@ namespace JSC {
 #endif
         void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, Structure* structure, size_t cachedOffset);
         void compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset);
+        void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID structure, RegisterID offset);
         void compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, Structure* structure, size_t cachedOffset);
 
         // Arithmetic opcode helpers
@@ -432,7 +436,7 @@ namespace JSC {
         void emitSub32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
         void emitBinaryDoubleOp(OpcodeID, unsigned dst, unsigned op1, unsigned op2, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true);
 
-#if PLATFORM(X86)
+#if CPU(X86)
         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
         static const int patchOffsetPutByIdStructure = 7;
         static const int patchOffsetPutByIdExternalLoad = 13;
@@ -461,6 +465,47 @@ namespace JSC {
         static const int patchOffsetMethodCheckProtoObj = 11;
         static const int patchOffsetMethodCheckProtoStruct = 18;
         static const int patchOffsetMethodCheckPutFunction = 29;
+#elif CPU(ARM_TRADITIONAL)
+        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
+        static const int patchOffsetPutByIdStructure = 4;
+        static const int patchOffsetPutByIdExternalLoad = 16;
+        static const int patchLengthPutByIdExternalLoad = 4;
+        static const int patchOffsetPutByIdPropertyMapOffset1 = 20;
+        static const int patchOffsetPutByIdPropertyMapOffset2 = 28;
+        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
+        static const int patchOffsetGetByIdStructure = 4;
+        static const int patchOffsetGetByIdBranchToSlowCase = 16;
+        static const int patchOffsetGetByIdExternalLoad = 16;
+        static const int patchLengthGetByIdExternalLoad = 4;
+        static const int patchOffsetGetByIdPropertyMapOffset1 = 20;
+        static const int patchOffsetGetByIdPropertyMapOffset2 = 28;
+        static const int patchOffsetGetByIdPutResult = 36;
+#if ENABLE(OPCODE_SAMPLING)
+        #error "OPCODE_SAMPLING is not yet supported"
+#else
+        static const int patchOffsetGetByIdSlowCaseCall = 32;
+#endif
+        static const int patchOffsetOpCallCompareToJump = 12;
+
+        static const int patchOffsetMethodCheckProtoObj = 12;
+        static const int patchOffsetMethodCheckProtoStruct = 20;
+        static const int patchOffsetMethodCheckPutFunction = 32;
+
+        // sequenceOpCall
+        static const int sequenceOpCallInstructionSpace = 12;
+        static const int sequenceOpCallConstantSpace = 2;
+        // sequenceMethodCheck
+        static const int sequenceMethodCheckInstructionSpace = 40;
+        static const int sequenceMethodCheckConstantSpace = 6;
+        // sequenceGetByIdHotPath
+        static const int sequenceGetByIdHotPathInstructionSpace = 36;
+        static const int sequenceGetByIdHotPathConstantSpace = 4;
+        // sequenceGetByIdSlowCase
+        static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
+        static const int sequenceGetByIdSlowCaseConstantSpace = 2;
+        // sequencePutById
+        static const int sequencePutByIdInstructionSpace = 36;
+        static const int sequencePutByIdConstantSpace = 4;
 #else
 #error "JSVALUE32_64 not supported on this platform."
 #endif
@@ -526,9 +571,10 @@ namespace JSC {
 #endif
         void compileGetDirectOffset(RegisterID base, RegisterID result, Structure* structure, size_t cachedOffset);
         void compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID result, size_t cachedOffset);
+        void compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID structure, RegisterID offset, RegisterID scratch);
         void compilePutDirectOffset(RegisterID base, RegisterID value, Structure* structure, size_t cachedOffset);
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
         static const int patchOffsetPutByIdStructure = 10;
         static const int patchOffsetPutByIdExternalLoad = 20;
@@ -542,7 +588,7 @@ namespace JSC {
         static const int patchOffsetGetByIdPropertyMapOffset = 31;
         static const int patchOffsetGetByIdPutResult = 31;
 #if ENABLE(OPCODE_SAMPLING)
-        static const int patchOffsetGetByIdSlowCaseCall = 63;
+        static const int patchOffsetGetByIdSlowCaseCall = 64;
 #else
         static const int patchOffsetGetByIdSlowCaseCall = 41;
 #endif
@@ -551,7 +597,7 @@ namespace JSC {
         static const int patchOffsetMethodCheckProtoObj = 20;
         static const int patchOffsetMethodCheckProtoStruct = 30;
         static const int patchOffsetMethodCheckPutFunction = 50;
-#elif PLATFORM(X86)
+#elif CPU(X86)
         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
         static const int patchOffsetPutByIdStructure = 7;
         static const int patchOffsetPutByIdExternalLoad = 13;
@@ -578,30 +624,30 @@ namespace JSC {
         static const int patchOffsetMethodCheckProtoObj = 11;
         static const int patchOffsetMethodCheckProtoStruct = 18;
         static const int patchOffsetMethodCheckPutFunction = 29;
-#elif PLATFORM(ARM_THUMB2)
+#elif CPU(ARM_THUMB2)
         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
         static const int patchOffsetPutByIdStructure = 10;
-        static const int patchOffsetPutByIdExternalLoad = 20;
+        static const int patchOffsetPutByIdExternalLoad = 26;
         static const int patchLengthPutByIdExternalLoad = 12;
-        static const int patchOffsetPutByIdPropertyMapOffset = 40;
+        static const int patchOffsetPutByIdPropertyMapOffset = 46;
         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
         static const int patchOffsetGetByIdStructure = 10;
-        static const int patchOffsetGetByIdBranchToSlowCase = 20;
-        static const int patchOffsetGetByIdExternalLoad = 20;
+        static const int patchOffsetGetByIdBranchToSlowCase = 26;
+        static const int patchOffsetGetByIdExternalLoad = 26;
         static const int patchLengthGetByIdExternalLoad = 12;
-        static const int patchOffsetGetByIdPropertyMapOffset = 40;
-        static const int patchOffsetGetByIdPutResult = 44;
+        static const int patchOffsetGetByIdPropertyMapOffset = 46;
+        static const int patchOffsetGetByIdPutResult = 50;
 #if ENABLE(OPCODE_SAMPLING)
         static const int patchOffsetGetByIdSlowCaseCall = 0; // FIMXE
 #else
         static const int patchOffsetGetByIdSlowCaseCall = 28;
 #endif
-        static const int patchOffsetOpCallCompareToJump = 10;
+        static const int patchOffsetOpCallCompareToJump = 16;
 
-        static const int patchOffsetMethodCheckProtoObj = 18;
-        static const int patchOffsetMethodCheckProtoStruct = 28;
-        static const int patchOffsetMethodCheckPutFunction = 46;
-#elif PLATFORM(ARM_TRADITIONAL)
+        static const int patchOffsetMethodCheckProtoObj = 24;
+        static const int patchOffsetMethodCheckProtoStruct = 34;
+        static const int patchOffsetMethodCheckPutFunction = 58;
+#elif CPU(ARM_TRADITIONAL)
         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
         static const int patchOffsetPutByIdStructure = 4;
         static const int patchOffsetPutByIdExternalLoad = 16;
@@ -617,17 +663,14 @@ namespace JSC {
 #if ENABLE(OPCODE_SAMPLING)
         #error "OPCODE_SAMPLING is not yet supported"
 #else
-        static const int patchOffsetGetByIdSlowCaseCall = 36;
+        static const int patchOffsetGetByIdSlowCaseCall = 28;
 #endif
         static const int patchOffsetOpCallCompareToJump = 12;
 
         static const int patchOffsetMethodCheckProtoObj = 12;
         static const int patchOffsetMethodCheckProtoStruct = 20;
         static const int patchOffsetMethodCheckPutFunction = 32;
-#endif
-#endif // USE(JSVALUE32_64)
 
-#if PLATFORM(ARM_TRADITIONAL)
         // sequenceOpCall
         static const int sequenceOpCallInstructionSpace = 12;
         static const int sequenceOpCallConstantSpace = 2;
@@ -638,12 +681,13 @@ namespace JSC {
         static const int sequenceGetByIdHotPathInstructionSpace = 28;
         static const int sequenceGetByIdHotPathConstantSpace = 3;
         // sequenceGetByIdSlowCase
-        static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
+        static const int sequenceGetByIdSlowCaseInstructionSpace = 32;
         static const int sequenceGetByIdSlowCaseConstantSpace = 2;
         // sequencePutById
         static const int sequencePutByIdInstructionSpace = 28;
         static const int sequencePutByIdConstantSpace = 3;
 #endif
+#endif // USE(JSVALUE32_64)
 
 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
 #define BEGIN_UNINTERRUPTED_SEQUENCE(name) beginUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace)
@@ -680,6 +724,7 @@ namespace JSC {
         void emit_op_eq_null(Instruction*);
         void emit_op_get_by_id(Instruction*);
         void emit_op_get_by_val(Instruction*);
+        void emit_op_get_by_pname(Instruction*);
         void emit_op_get_global_var(Instruction*);
         void emit_op_get_scoped_var(Instruction*);
         void emit_op_init_arguments(Instruction*);
@@ -691,6 +736,7 @@ namespace JSC {
         void emit_op_jneq_null(Instruction*);
         void emit_op_jneq_ptr(Instruction*);
         void emit_op_jnless(Instruction*);
+        void emit_op_jless(Instruction*);
         void emit_op_jnlesseq(Instruction*);
         void emit_op_jsr(Instruction*);
         void emit_op_jtrue(Instruction*);
@@ -699,6 +745,7 @@ namespace JSC {
         void emit_op_loop_if_less(Instruction*);
         void emit_op_loop_if_lesseq(Instruction*);
         void emit_op_loop_if_true(Instruction*);
+        void emit_op_loop_if_false(Instruction*);
         void emit_op_lshift(Instruction*);
         void emit_op_method_check(Instruction*);
         void emit_op_mod(Instruction*);
@@ -713,6 +760,7 @@ namespace JSC {
         void emit_op_new_func_exp(Instruction*);
         void emit_op_new_object(Instruction*);
         void emit_op_new_regexp(Instruction*);
+        void emit_op_get_pnames(Instruction*);
         void emit_op_next_pname(Instruction*);
         void emit_op_not(Instruction*);
         void emit_op_nstricteq(Instruction*);
@@ -768,14 +816,17 @@ namespace JSC {
         void emitSlow_op_eq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_get_by_pname(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_instanceof(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jfalse(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jnless(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_jless(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jnlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jtrue(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_loop_if_less(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_loop_if_lesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_loop_if_true(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_loop_if_false(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_lshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&);
@@ -903,6 +954,46 @@ namespace JSC {
 #endif
 #endif
     } JIT_CLASS_ALIGNMENT;
+
+    inline void JIT::emit_op_loop(Instruction* currentInstruction)
+    {
+        emitTimeoutCheck();
+        emit_op_jmp(currentInstruction);
+    }
+
+    inline void JIT::emit_op_loop_if_true(Instruction* currentInstruction)
+    {
+        emitTimeoutCheck();
+        emit_op_jtrue(currentInstruction);
+    }
+
+    inline void JIT::emitSlow_op_loop_if_true(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+    {
+        emitSlow_op_jtrue(currentInstruction, iter);
+    }
+
+    inline void JIT::emit_op_loop_if_false(Instruction* currentInstruction)
+    {
+        emitTimeoutCheck();
+        emit_op_jfalse(currentInstruction);
+    }
+
+    inline void JIT::emitSlow_op_loop_if_false(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+    {
+        emitSlow_op_jfalse(currentInstruction, iter);
+    }
+
+    inline void JIT::emit_op_loop_if_less(Instruction* currentInstruction)
+    {
+        emitTimeoutCheck();
+        emit_op_jless(currentInstruction);
+    }
+
+    inline void JIT::emitSlow_op_loop_if_less(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+    {
+        emitSlow_op_jless(currentInstruction, iter);
+    }
+
 } // namespace JSC
 
 #endif // ENABLE(JIT)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITArithmetic.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITArithmetic.cpp
index 7afc1f2..feee8d2 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITArithmetic.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITArithmetic.cpp
@@ -98,16 +98,16 @@ void JIT::emit_op_jnless(Instruction* currentInstruction)
     if (isOperandConstantImmediateInt(op1)) {
         emitLoad(op2, regT3, regT2);
         notInt32Op2.append(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(LessThanOrEqual, regT2, Imm32(getConstantOperand(op1).asInt32())), target + 3);
+        addJump(branch32(LessThanOrEqual, regT2, Imm32(getConstantOperand(op1).asInt32())), target);
     } else if (isOperandConstantImmediateInt(op2)) {
         emitLoad(op1, regT1, regT0);
         notInt32Op1.append(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(GreaterThanOrEqual, regT0, Imm32(getConstantOperand(op2).asInt32())), target + 3);
+        addJump(branch32(GreaterThanOrEqual, regT0, Imm32(getConstantOperand(op2).asInt32())), target);
     } else {
         emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
         notInt32Op1.append(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
         notInt32Op2.append(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(GreaterThanOrEqual, regT0, regT2), target + 3);
+        addJump(branch32(GreaterThanOrEqual, regT0, regT2), target);
     }
 
     if (!supportsFloatingPoint()) {
@@ -145,7 +145,70 @@ void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEnt
     stubCall.addArgument(op1);
     stubCall.addArgument(op2);
     stubCall.call();
-    emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+    emitJumpSlowToHot(branchTest32(Zero, regT0), target);
+}
+
+void JIT::emit_op_jless(Instruction* currentInstruction)
+{
+    unsigned op1 = currentInstruction[1].u.operand;
+    unsigned op2 = currentInstruction[2].u.operand;
+    unsigned target = currentInstruction[3].u.operand;
+
+    JumpList notInt32Op1;
+    JumpList notInt32Op2;
+
+    // Int32 less.
+    if (isOperandConstantImmediateInt(op1)) {
+        emitLoad(op2, regT3, regT2);
+        notInt32Op2.append(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
+        addJump(branch32(GreaterThan, regT2, Imm32(getConstantOperand(op1).asInt32())), target);
+    } else if (isOperandConstantImmediateInt(op2)) {
+        emitLoad(op1, regT1, regT0);
+        notInt32Op1.append(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
+        addJump(branch32(LessThan, regT0, Imm32(getConstantOperand(op2).asInt32())), target);
+    } else {
+        emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
+        notInt32Op1.append(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
+        notInt32Op2.append(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
+        addJump(branch32(LessThan, regT0, regT2), target);
+    }
+
+    if (!supportsFloatingPoint()) {
+        addSlowCase(notInt32Op1);
+        addSlowCase(notInt32Op2);
+        return;
+    }
+    Jump end = jump();
+
+    // Double less.
+    emitBinaryDoubleOp(op_jless, target, op1, op2, OperandTypes(), notInt32Op1, notInt32Op2, !isOperandConstantImmediateInt(op1), isOperandConstantImmediateInt(op1) || !isOperandConstantImmediateInt(op2));
+    end.link(this);
+}
+
+void JIT::emitSlow_op_jless(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    unsigned op1 = currentInstruction[1].u.operand;
+    unsigned op2 = currentInstruction[2].u.operand;
+    unsigned target = currentInstruction[3].u.operand;
+
+    if (!supportsFloatingPoint()) {
+        if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
+            linkSlowCase(iter); // int32 check
+        linkSlowCase(iter); // int32 check
+    } else {
+        if (!isOperandConstantImmediateInt(op1)) {
+            linkSlowCase(iter); // double check
+            linkSlowCase(iter); // int32 check
+        }
+        if (isOperandConstantImmediateInt(op1) || !isOperandConstantImmediateInt(op2))
+            linkSlowCase(iter); // double check
+    }
+
+    JITStubCall stubCall(this, cti_op_jless);
+    stubCall.addArgument(op1);
+    stubCall.addArgument(op2);
+    stubCall.call();
+    emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
 }
 
 void JIT::emit_op_jnlesseq(Instruction* currentInstruction)
@@ -161,16 +224,16 @@ void JIT::emit_op_jnlesseq(Instruction* currentInstruction)
     if (isOperandConstantImmediateInt(op1)) {
         emitLoad(op2, regT3, regT2);
         notInt32Op2.append(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(LessThan, regT2, Imm32(getConstantOperand(op1).asInt32())), target + 3);
+        addJump(branch32(LessThan, regT2, Imm32(getConstantOperand(op1).asInt32())), target);
     } else if (isOperandConstantImmediateInt(op2)) {
         emitLoad(op1, regT1, regT0);
         notInt32Op1.append(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(GreaterThan, regT0, Imm32(getConstantOperand(op2).asInt32())), target + 3);
+        addJump(branch32(GreaterThan, regT0, Imm32(getConstantOperand(op2).asInt32())), target);
     } else {
         emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
         notInt32Op1.append(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
         notInt32Op2.append(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(GreaterThan, regT0, regT2), target + 3);
+        addJump(branch32(GreaterThan, regT0, regT2), target);
     }
 
     if (!supportsFloatingPoint()) {
@@ -208,7 +271,7 @@ void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseE
     stubCall.addArgument(op1);
     stubCall.addArgument(op2);
     stubCall.call();
-    emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+    emitJumpSlowToHot(branchTest32(Zero, regT0), target);
 }
 
 // LeftShift (<<)
@@ -829,11 +892,15 @@ void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsi
                 break;
             case op_jnless:
                 emitLoadDouble(op1, fpRegT2);
-                addJump(branchDouble(DoubleLessThanOrEqual, fpRegT0, fpRegT2), dst + 3);
+                addJump(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT0, fpRegT2), dst);
+                break;
+            case op_jless:
+                emitLoadDouble(op1, fpRegT2);
+                addJump(branchDouble(DoubleLessThan, fpRegT2, fpRegT0), dst);
                 break;
             case op_jnlesseq:
                 emitLoadDouble(op1, fpRegT2);
-                addJump(branchDouble(DoubleLessThan, fpRegT0, fpRegT2), dst + 3);
+                addJump(branchDouble(DoubleLessThanOrUnordered, fpRegT0, fpRegT2), dst);
                 break;
             default:
                 ASSERT_NOT_REACHED();
@@ -882,11 +949,15 @@ void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsi
                 break;
             case op_jnless:
                 emitLoadDouble(op2, fpRegT1);
-                addJump(branchDouble(DoubleLessThanOrEqual, fpRegT1, fpRegT0), dst + 3);
+                addJump(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT1, fpRegT0), dst);
+                break;
+            case op_jless:
+                emitLoadDouble(op2, fpRegT1);
+                addJump(branchDouble(DoubleLessThan, fpRegT0, fpRegT1), dst);
                 break;
             case op_jnlesseq:
                 emitLoadDouble(op2, fpRegT1);
-                addJump(branchDouble(DoubleLessThan, fpRegT1, fpRegT0), dst + 3);
+                addJump(branchDouble(DoubleLessThanOrUnordered, fpRegT1, fpRegT0), dst);
                 break;
             default:
                 ASSERT_NOT_REACHED();
@@ -1000,20 +1071,11 @@ void JIT::emit_op_div(Instruction* currentInstruction)
     divDouble(fpRegT1, fpRegT0);
 
     JumpList doubleResult;
-    if (!isOperandConstantImmediateInt(op1) || getConstantOperand(op1).asInt32() > 1) {
-        m_assembler.cvttsd2si_rr(fpRegT0, regT0);
-        convertInt32ToDouble(regT0, fpRegT1);
-        m_assembler.ucomisd_rr(fpRegT1, fpRegT0);
-
-        doubleResult.append(m_assembler.jne());
-        doubleResult.append(m_assembler.jp());
-        
-        doubleResult.append(branchTest32(Zero, regT0));
+    branchConvertDoubleToInt32(fpRegT0, regT0, doubleResult, fpRegT1);
 
-        // Int32 result.
-        emitStoreInt32(dst, regT0, (op1 == dst || op2 == dst));
-        end.append(jump());
-    }
+    // Int32 result.
+    emitStoreInt32(dst, regT0, (op1 == dst || op2 == dst));
+    end.append(jump());
 
     // Double result.
     doubleResult.link(this);
@@ -1054,7 +1116,7 @@ void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>
 
 /* ------------------------------ BEGIN: OP_MOD ------------------------------ */
 
-#if PLATFORM(X86) || PLATFORM(X86_64)
+#if CPU(X86) || CPU(X86_64)
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
@@ -1116,7 +1178,7 @@ void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>
     stubCall.call(dst);
 }
 
-#else // PLATFORM(X86) || PLATFORM(X86_64)
+#else // CPU(X86) || CPU(X86_64)
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
@@ -1134,7 +1196,7 @@ void JIT::emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&)
 {
 }
 
-#endif // PLATFORM(X86) || PLATFORM(X86_64)
+#endif // CPU(X86) || CPU(X86_64)
 
 /* ------------------------------ END: OP_MOD ------------------------------ */
 
@@ -1152,13 +1214,8 @@ void JIT::emit_op_lshift(Instruction* currentInstruction)
     emitJumpSlowCaseIfNotImmediateInteger(regT2);
     emitFastArithImmToInt(regT0);
     emitFastArithImmToInt(regT2);
-#if !PLATFORM(X86)
-    // Mask with 0x1f as per ecma-262 11.7.2 step 7.
-    // On 32-bit x86 this is not necessary, since the shift anount is implicitly masked in the instruction.
-    and32(Imm32(0x1f), regT2);
-#endif
     lshift32(regT2, regT0);
-#if !USE(JSVALUE64)
+#if USE(JSVALUE32)
     addSlowCase(branchAdd32(Overflow, regT0, regT0));
     signExtend32ToPtr(regT0, regT0);
 #endif
@@ -1203,11 +1260,7 @@ void JIT::emit_op_rshift(Instruction* currentInstruction)
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         // Mask with 0x1f as per ecma-262 11.7.2 step 7.
-#if USE(JSVALUE64)
         rshift32(Imm32(getConstantOperandImmediateInt(op2) & 0x1f), regT0);
-#else
-        rshiftPtr(Imm32(getConstantOperandImmediateInt(op2) & 0x1f), regT0);
-#endif
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT2);
         if (supportsFloatingPointTruncate()) {
@@ -1234,15 +1287,9 @@ void JIT::emit_op_rshift(Instruction* currentInstruction)
             emitJumpSlowCaseIfNotImmediateInteger(regT2);
         }
         emitFastArithImmToInt(regT2);
-#if !PLATFORM(X86)
-        // Mask with 0x1f as per ecma-262 11.7.2 step 7.
-        // On 32-bit x86 this is not necessary, since the shift anount is implicitly masked in the instruction.
-        and32(Imm32(0x1f), regT2);
-#endif
-#if USE(JSVALUE64)
         rshift32(regT2, regT0);
-#else
-        rshiftPtr(regT2, regT0);
+#if USE(JSVALUE32)
+        signExtend32ToPtr(regT0, regT0);
 #endif
     }
 #if USE(JSVALUE64)
@@ -1313,7 +1360,7 @@ void JIT::emit_op_jnless(Instruction* currentInstruction)
 #else
         int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
 #endif
-        addJump(branch32(GreaterThanOrEqual, regT0, Imm32(op2imm)), target + 3);
+        addJump(branch32(GreaterThanOrEqual, regT0, Imm32(op2imm)), target);
     } else if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
@@ -1322,13 +1369,13 @@ void JIT::emit_op_jnless(Instruction* currentInstruction)
 #else
         int32_t op1imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)));
 #endif
-        addJump(branch32(LessThanOrEqual, regT1, Imm32(op1imm)), target + 3);
+        addJump(branch32(LessThanOrEqual, regT1, Imm32(op1imm)), target);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
 
-        addJump(branch32(GreaterThanOrEqual, regT0, regT1), target + 3);
+        addJump(branch32(GreaterThanOrEqual, regT0, regT1), target);
     }
 }
 
@@ -1365,7 +1412,7 @@ void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEnt
             move(Imm32(op2imm), regT1);
             convertInt32ToDouble(regT1, fpRegT1);
 
-            emitJumpSlowToHot(branchDouble(DoubleLessThanOrEqual, fpRegT1, fpRegT0), target + 3);
+            emitJumpSlowToHot(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
@@ -1382,7 +1429,7 @@ void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEnt
         stubCall.addArgument(regT0);
         stubCall.addArgument(op2, regT2);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(Zero, regT0), target);
 
     } else if (isOperandConstantImmediateInt(op1)) {
         linkSlowCase(iter);
@@ -1406,7 +1453,7 @@ void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEnt
             move(Imm32(op1imm), regT0);
             convertInt32ToDouble(regT0, fpRegT0);
 
-            emitJumpSlowToHot(branchDouble(DoubleLessThanOrEqual, fpRegT1, fpRegT0), target + 3);
+            emitJumpSlowToHot(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
@@ -1423,7 +1470,7 @@ void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEnt
         stubCall.addArgument(op1, regT2);
         stubCall.addArgument(regT1);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(Zero, regT0), target);
 
     } else {
         linkSlowCase(iter);
@@ -1452,7 +1499,7 @@ void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEnt
             loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
 #endif
 
-            emitJumpSlowToHot(branchDouble(DoubleLessThanOrEqual, fpRegT1, fpRegT0), target + 3);
+            emitJumpSlowToHot(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
@@ -1475,7 +1522,192 @@ void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEnt
         stubCall.addArgument(regT0);
         stubCall.addArgument(regT1);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(Zero, regT0), target);
+    }
+}
+
+void JIT::emit_op_jless(Instruction* currentInstruction)
+{
+    unsigned op1 = currentInstruction[1].u.operand;
+    unsigned op2 = currentInstruction[2].u.operand;
+    unsigned target = currentInstruction[3].u.operand;
+
+    // We generate inline code for the following cases in the fast path:
+    // - int immediate to constant int immediate
+    // - constant int immediate to int immediate
+    // - int immediate to int immediate
+
+    if (isOperandConstantImmediateInt(op2)) {
+        emitGetVirtualRegister(op1, regT0);
+        emitJumpSlowCaseIfNotImmediateInteger(regT0);
+#if USE(JSVALUE64)
+        int32_t op2imm = getConstantOperandImmediateInt(op2);
+#else
+        int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
+#endif
+        addJump(branch32(LessThan, regT0, Imm32(op2imm)), target);
+    } else if (isOperandConstantImmediateInt(op1)) {
+        emitGetVirtualRegister(op2, regT1);
+        emitJumpSlowCaseIfNotImmediateInteger(regT1);
+#if USE(JSVALUE64)
+        int32_t op1imm = getConstantOperandImmediateInt(op1);
+#else
+        int32_t op1imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)));
+#endif
+        addJump(branch32(GreaterThan, regT1, Imm32(op1imm)), target);
+    } else {
+        emitGetVirtualRegisters(op1, regT0, op2, regT1);
+        emitJumpSlowCaseIfNotImmediateInteger(regT0);
+        emitJumpSlowCaseIfNotImmediateInteger(regT1);
+
+        addJump(branch32(LessThan, regT0, regT1), target);
+    }
+}
+
+void JIT::emitSlow_op_jless(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    unsigned op1 = currentInstruction[1].u.operand;
+    unsigned op2 = currentInstruction[2].u.operand;
+    unsigned target = currentInstruction[3].u.operand;
+
+    // We generate inline code for the following cases in the slow path:
+    // - floating-point number to constant int immediate
+    // - constant int immediate to floating-point number
+    // - floating-point number to floating-point number.
+
+    if (isOperandConstantImmediateInt(op2)) {
+        linkSlowCase(iter);
+
+        if (supportsFloatingPoint()) {
+#if USE(JSVALUE64)
+            Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
+            addPtr(tagTypeNumberRegister, regT0);
+            movePtrToDouble(regT0, fpRegT0);
+#else
+            Jump fail1;
+            if (!m_codeBlock->isKnownNotImmediate(op1))
+                fail1 = emitJumpIfNotJSCell(regT0);
+
+            Jump fail2 = checkStructure(regT0, m_globalData->numberStructure.get());
+            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
+#endif
+            
+            int32_t op2imm = getConstantOperand(op2).asInt32();
+                    
+            move(Imm32(op2imm), regT1);
+            convertInt32ToDouble(regT1, fpRegT1);
+
+            emitJumpSlowToHot(branchDouble(DoubleLessThan, fpRegT0, fpRegT1), target);
+
+            emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
+
+#if USE(JSVALUE64)
+            fail1.link(this);
+#else
+            if (!m_codeBlock->isKnownNotImmediate(op1))
+                fail1.link(this);
+            fail2.link(this);
+#endif
+        }
+
+        JITStubCall stubCall(this, cti_op_jless);
+        stubCall.addArgument(regT0);
+        stubCall.addArgument(op2, regT2);
+        stubCall.call();
+        emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
+
+    } else if (isOperandConstantImmediateInt(op1)) {
+        linkSlowCase(iter);
+
+        if (supportsFloatingPoint()) {
+#if USE(JSVALUE64)
+            Jump fail1 = emitJumpIfNotImmediateNumber(regT1);
+            addPtr(tagTypeNumberRegister, regT1);
+            movePtrToDouble(regT1, fpRegT1);
+#else
+            Jump fail1;
+            if (!m_codeBlock->isKnownNotImmediate(op2))
+                fail1 = emitJumpIfNotJSCell(regT1);
+            
+            Jump fail2 = checkStructure(regT1, m_globalData->numberStructure.get());
+            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
+#endif
+            
+            int32_t op1imm = getConstantOperand(op1).asInt32();
+                    
+            move(Imm32(op1imm), regT0);
+            convertInt32ToDouble(regT0, fpRegT0);
+
+            emitJumpSlowToHot(branchDouble(DoubleLessThan, fpRegT0, fpRegT1), target);
+
+            emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
+
+#if USE(JSVALUE64)
+            fail1.link(this);
+#else
+            if (!m_codeBlock->isKnownNotImmediate(op2))
+                fail1.link(this);
+            fail2.link(this);
+#endif
+        }
+
+        JITStubCall stubCall(this, cti_op_jless);
+        stubCall.addArgument(op1, regT2);
+        stubCall.addArgument(regT1);
+        stubCall.call();
+        emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
+
+    } else {
+        linkSlowCase(iter);
+
+        if (supportsFloatingPoint()) {
+#if USE(JSVALUE64)
+            Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
+            Jump fail2 = emitJumpIfNotImmediateNumber(regT1);
+            Jump fail3 = emitJumpIfImmediateInteger(regT1);
+            addPtr(tagTypeNumberRegister, regT0);
+            addPtr(tagTypeNumberRegister, regT1);
+            movePtrToDouble(regT0, fpRegT0);
+            movePtrToDouble(regT1, fpRegT1);
+#else
+            Jump fail1;
+            if (!m_codeBlock->isKnownNotImmediate(op1))
+                fail1 = emitJumpIfNotJSCell(regT0);
+
+            Jump fail2;
+            if (!m_codeBlock->isKnownNotImmediate(op2))
+                fail2 = emitJumpIfNotJSCell(regT1);
+
+            Jump fail3 = checkStructure(regT0, m_globalData->numberStructure.get());
+            Jump fail4 = checkStructure(regT1, m_globalData->numberStructure.get());
+            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
+            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
+#endif
+
+            emitJumpSlowToHot(branchDouble(DoubleLessThan, fpRegT0, fpRegT1), target);
+
+            emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
+
+#if USE(JSVALUE64)
+            fail1.link(this);
+            fail2.link(this);
+            fail3.link(this);
+#else
+            if (!m_codeBlock->isKnownNotImmediate(op1))
+                fail1.link(this);
+            if (!m_codeBlock->isKnownNotImmediate(op2))
+                fail2.link(this);
+            fail3.link(this);
+            fail4.link(this);
+#endif
+        }
+
+        linkSlowCase(iter);
+        JITStubCall stubCall(this, cti_op_jless);
+        stubCall.addArgument(regT0);
+        stubCall.addArgument(regT1);
+        stubCall.call();
+        emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
     }
 }
 
@@ -1498,7 +1730,7 @@ void JIT::emit_op_jnlesseq(Instruction* currentInstruction)
 #else
         int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
 #endif
-        addJump(branch32(GreaterThan, regT0, Imm32(op2imm)), target + 3);
+        addJump(branch32(GreaterThan, regT0, Imm32(op2imm)), target);
     } else if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
@@ -1507,13 +1739,13 @@ void JIT::emit_op_jnlesseq(Instruction* currentInstruction)
 #else
         int32_t op1imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)));
 #endif
-        addJump(branch32(LessThan, regT1, Imm32(op1imm)), target + 3);
+        addJump(branch32(LessThan, regT1, Imm32(op1imm)), target);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
 
-        addJump(branch32(GreaterThan, regT0, regT1), target + 3);
+        addJump(branch32(GreaterThan, regT0, regT1), target);
     }
 }
 
@@ -1550,7 +1782,7 @@ void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseE
             move(Imm32(op2imm), regT1);
             convertInt32ToDouble(regT1, fpRegT1);
 
-            emitJumpSlowToHot(branchDouble(DoubleLessThan, fpRegT1, fpRegT0), target + 3);
+            emitJumpSlowToHot(branchDouble(DoubleLessThanOrUnordered, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnlesseq));
 
@@ -1567,7 +1799,7 @@ void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseE
         stubCall.addArgument(regT0);
         stubCall.addArgument(op2, regT2);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(Zero, regT0), target);
 
     } else if (isOperandConstantImmediateInt(op1)) {
         linkSlowCase(iter);
@@ -1591,7 +1823,7 @@ void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseE
             move(Imm32(op1imm), regT0);
             convertInt32ToDouble(regT0, fpRegT0);
 
-            emitJumpSlowToHot(branchDouble(DoubleLessThan, fpRegT1, fpRegT0), target + 3);
+            emitJumpSlowToHot(branchDouble(DoubleLessThanOrUnordered, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnlesseq));
 
@@ -1608,7 +1840,7 @@ void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseE
         stubCall.addArgument(op1, regT2);
         stubCall.addArgument(regT1);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(Zero, regT0), target);
 
     } else {
         linkSlowCase(iter);
@@ -1637,7 +1869,7 @@ void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseE
             loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
 #endif
 
-            emitJumpSlowToHot(branchDouble(DoubleLessThan, fpRegT1, fpRegT0), target + 3);
+            emitJumpSlowToHot(branchDouble(DoubleLessThanOrUnordered, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnlesseq));
 
@@ -1660,7 +1892,7 @@ void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseE
         stubCall.addArgument(regT0);
         stubCall.addArgument(regT1);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(Zero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(Zero, regT0), target);
     }
 }
 
@@ -1849,7 +2081,7 @@ void JIT::emitSlow_op_pre_dec(Instruction* currentInstruction, Vector<SlowCaseEn
 
 /* ------------------------------ BEGIN: OP_MOD ------------------------------ */
 
-#if PLATFORM(X86) || PLATFORM(X86_64)
+#if CPU(X86) || CPU(X86_64)
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
@@ -1898,7 +2130,7 @@ void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>
     stubCall.call(result);
 }
 
-#else // PLATFORM(X86) || PLATFORM(X86_64)
+#else // CPU(X86) || CPU(X86_64)
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
@@ -1917,7 +2149,7 @@ void JIT::emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&)
     ASSERT_NOT_REACHED();
 }
 
-#endif // PLATFORM(X86) || PLATFORM(X86_64)
+#endif // CPU(X86) || CPU(X86_64)
 
 /* ------------------------------ END: OP_MOD ------------------------------ */
 
@@ -2160,27 +2392,10 @@ void JIT::emit_op_div(Instruction* currentInstruction)
     }
     divDouble(fpRegT1, fpRegT0);
 
-    JumpList doubleResult;
-    Jump end;
-    bool attemptIntConversion = (!isOperandConstantImmediateInt(op1) || getConstantOperand(op1).asInt32() > 1) && isOperandConstantImmediateInt(op2);
-    if (attemptIntConversion) {
-        m_assembler.cvttsd2si_rr(fpRegT0, regT0);
-        doubleResult.append(branchTest32(Zero, regT0));
-        m_assembler.ucomisd_rr(fpRegT1, fpRegT0);
-        
-        doubleResult.append(m_assembler.jne());
-        doubleResult.append(m_assembler.jp());
-        emitFastArithIntToImmNoCheck(regT0, regT0);
-        end = jump();
-    }
-
     // Double result.
-    doubleResult.link(this);
     moveDoubleToPtr(fpRegT0, regT0);
     subPtr(tagTypeNumberRegister, regT0);
 
-    if (attemptIntConversion)
-        end.link(this);
     emitPutVirtualRegister(dst, regT0);
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITCall.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITCall.cpp
index f4f6e62..07253e1 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITCall.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITCall.cpp
@@ -249,10 +249,10 @@ void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
         stubCall.addArgument(JIT::Imm32(registerOffset));
         stubCall.addArgument(JIT::Imm32(argCount));
         stubCall.call();
-        wasEval = branch32(Equal, regT1, Imm32(JSValue::EmptyValueTag));
+        wasEval = branch32(NotEqual, regT1, Imm32(JSValue::EmptyValueTag));
     }
 
-    emitLoad(callee, regT1, regT2);
+    emitLoad(callee, regT1, regT0);
 
     if (opcodeID == op_call)
         compileOpCallSetupArgs(instruction);
@@ -260,12 +260,12 @@ void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
         compileOpConstructSetupArgs(instruction);
 
     emitJumpSlowCaseIfNotJSCell(callee, regT1);
-    addSlowCase(branchPtr(NotEqual, Address(regT2), ImmPtr(m_globalData->jsFunctionVPtr)));
+    addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr)));
 
     // First, in the case of a construct, allocate the new object.
     if (opcodeID == op_construct) {
         JITStubCall(this, cti_op_construct_JSConstruct).call(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
-        emitLoad(callee, regT1, regT2);
+        emitLoad(callee, regT1, regT0);
     }
 
     // Speculatively roll the callframe, assuming argCount will match the arity.
@@ -278,7 +278,7 @@ void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
     if (opcodeID == op_call_eval)
         wasEval.link(this);
 
-    emitStore(dst, regT1, regT0);;
+    emitStore(dst, regT1, regT0);
 
     sampleCodeBlock(m_codeBlock);
 }
@@ -321,7 +321,13 @@ void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned ca
     emitLoad(callee, regT1, regT0);
 
     DataLabelPtr addressOfLinkedFunctionCheck;
+
+    BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+
     Jump jumpToSlow = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, ImmPtr(0));
+
+    END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+
     addSlowCase(jumpToSlow);
     ASSERT(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow) == patchOffsetOpCallCompareToJump);
     m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
@@ -620,7 +626,7 @@ void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned ca
     END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
 
     addSlowCase(jumpToSlow);
-    ASSERT(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow) == patchOffsetOpCallCompareToJump);
+    ASSERT_JIT_OFFSET(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow), patchOffsetOpCallCompareToJump);
     m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
 
     // The following is the fast case, only used whan a callee can be linked.
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITInlineMethods.h b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITInlineMethods.h
index f26457a..5af7565 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITInlineMethods.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITInlineMethods.h
@@ -37,7 +37,7 @@ namespace JSC {
 // puts an arg onto the stack, as an arg to a context threaded function.
 ALWAYS_INLINE void JIT::emitPutJITStubArg(RegisterID src, unsigned argumentNumber)
 {
-    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + 1;
+    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
     poke(src, argumentStackOffset);
 }
 
@@ -45,7 +45,7 @@ ALWAYS_INLINE void JIT::emitPutJITStubArg(RegisterID src, unsigned argumentNumbe
 
 ALWAYS_INLINE void JIT::emitPutJITStubArgConstant(unsigned value, unsigned argumentNumber)
 {
-    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + 1;
+    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
     poke(Imm32(value), argumentStackOffset);
 }
 
@@ -53,7 +53,7 @@ ALWAYS_INLINE void JIT::emitPutJITStubArgConstant(unsigned value, unsigned argum
 
 ALWAYS_INLINE void JIT::emitPutJITStubArgConstant(void* value, unsigned argumentNumber)
 {
-    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + 1;
+    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
     poke(ImmPtr(value), argumentStackOffset);
 }
 
@@ -61,7 +61,7 @@ ALWAYS_INLINE void JIT::emitPutJITStubArgConstant(void* value, unsigned argument
 
 ALWAYS_INLINE void JIT::emitGetJITStubArg(unsigned argumentNumber, RegisterID dst)
 {
-    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + 1;
+    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
     peek(dst, argumentStackOffset);
 }
 
@@ -115,7 +115,7 @@ ALWAYS_INLINE JIT::Call JIT::emitNakedCall(CodePtr function)
 
 ALWAYS_INLINE void JIT::beginUninterruptedSequence(int insnSpace, int constSpace)
 {
-#if PLATFORM(ARM_TRADITIONAL)
+#if CPU(ARM_TRADITIONAL)
 #ifndef NDEBUG
     // Ensure the label after the sequence can also fit
     insnSpace += sizeof(ARMWord);
@@ -144,7 +144,7 @@ ALWAYS_INLINE void JIT::endUninterruptedSequence(int insnSpace, int constSpace)
 
 #endif
 
-#if PLATFORM(ARM_THUMB2)
+#if CPU(ARM)
 
 ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg)
 {
@@ -161,7 +161,7 @@ ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address)
     loadPtr(address, linkRegister);
 }
 
-#else // PLATFORM(X86) || PLATFORM(X86_64) || PLATFORM(ARM_TRADITIONAL)
+#else // CPU(X86) || CPU(X86_64)
 
 ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg)
 {
@@ -191,16 +191,13 @@ ALWAYS_INLINE void JIT::restoreArgumentReference()
 {
     move(stackPointerRegister, firstArgumentRegister);
     poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof (void*));
-#if PLATFORM(ARM_TRADITIONAL)
-    move(ctiReturnRegister, ARMRegisters::lr);
-#endif
 }
 ALWAYS_INLINE void JIT::restoreArgumentReferenceForTrampoline()
 {
-#if PLATFORM(X86)
+#if CPU(X86)
     // Within a trampoline the return address will be on the stack at this point.
     addPtr(Imm32(sizeof(void*)), stackPointerRegister, firstArgumentRegister);
-#elif PLATFORM(ARM_THUMB2)
+#elif CPU(ARM)
     move(stackPointerRegister, firstArgumentRegister);
 #endif
     // In the trampoline on x86-64, the first argument register is not overwritten.
@@ -268,9 +265,9 @@ ALWAYS_INLINE void JIT::clearSamplingFlag(int32_t flag)
 #if ENABLE(SAMPLING_COUNTERS)
 ALWAYS_INLINE void JIT::emitCount(AbstractSamplingCounter& counter, uint32_t count)
 {
-#if PLATFORM(X86_64) // Or any other 64-bit plattform.
+#if CPU(X86_64) // Or any other 64-bit plattform.
     addPtr(Imm32(count), AbsoluteAddress(&counter.m_counter));
-#elif PLATFORM(X86) // Or any other little-endian 32-bit plattform.
+#elif CPU(X86) // Or any other little-endian 32-bit plattform.
     intptr_t hiWord = reinterpret_cast<intptr_t>(&counter.m_counter) + sizeof(int32_t);
     add32(Imm32(count), AbsoluteAddress(&counter.m_counter));
     addWithCarry32(Imm32(0), AbsoluteAddress(reinterpret_cast<void*>(hiWord)));
@@ -281,7 +278,7 @@ ALWAYS_INLINE void JIT::emitCount(AbstractSamplingCounter& counter, uint32_t cou
 #endif
 
 #if ENABLE(OPCODE_SAMPLING)
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
 ALWAYS_INLINE void JIT::sampleInstruction(Instruction* instruction, bool inHostFunction)
 {
     move(ImmPtr(m_interpreter->sampler()->sampleSlot()), X86Registers::ecx);
@@ -296,7 +293,7 @@ ALWAYS_INLINE void JIT::sampleInstruction(Instruction* instruction, bool inHostF
 #endif
 
 #if ENABLE(CODEBLOCK_SAMPLING)
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
 ALWAYS_INLINE void JIT::sampleCodeBlock(CodeBlock* codeBlock)
 {
     move(ImmPtr(m_interpreter->sampler()->codeBlockSlot()), X86Registers::ecx);
@@ -588,7 +585,7 @@ ALWAYS_INLINE bool JIT::getOperandConstantImmediateInt(unsigned op1, unsigned op
 
 ALWAYS_INLINE void JIT::emitPutJITStubArg(RegisterID tag, RegisterID payload, unsigned argumentNumber)
 {
-    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + 1;
+    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
     poke(payload, argumentStackOffset);
     poke(tag, argumentStackOffset + 1);
 }
@@ -597,7 +594,7 @@ ALWAYS_INLINE void JIT::emitPutJITStubArg(RegisterID tag, RegisterID payload, un
 
 ALWAYS_INLINE void JIT::emitPutJITStubArgFromVirtualRegister(unsigned src, unsigned argumentNumber, RegisterID scratch1, RegisterID scratch2)
 {
-    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + 1;
+    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
     if (m_codeBlock->isConstantRegisterIndex(src)) {
         JSValue constant = m_codeBlock->getConstant(src);
         poke(Imm32(constant.payload()), argumentStackOffset);
@@ -820,7 +817,7 @@ ALWAYS_INLINE void JIT::emitFastArithImmToInt(RegisterID reg)
 #if USE(JSVALUE64)
     UNUSED_PARAM(reg);
 #else
-    rshiftPtr(Imm32(JSImmediate::IntegerPayloadShift), reg);
+    rshift32(Imm32(JSImmediate::IntegerPayloadShift), reg);
 #endif
 }
 
@@ -849,7 +846,7 @@ ALWAYS_INLINE void JIT::emitTagAsBoolImmediate(RegisterID reg)
 // get arg puts an arg from the SF register array onto the stack, as an arg to a context threaded function.
 ALWAYS_INLINE void JIT::emitPutJITStubArgFromVirtualRegister(unsigned src, unsigned argumentNumber, RegisterID scratch)
 {
-    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + 1;
+    unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
     if (m_codeBlock->isConstantRegisterIndex(src)) {
         JSValue value = m_codeBlock->getConstant(src);
         poke(ImmPtr(JSValue::encode(value)), argumentStackOffset);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITOpcodes.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITOpcodes.cpp
index b5f6597..601f2d6 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITOpcodes.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITOpcodes.cpp
@@ -33,6 +33,7 @@
 #include "JSArray.h"
 #include "JSCell.h"
 #include "JSFunction.h"
+#include "JSPropertyNameIterator.h"
 #include "LinkBuffer.h"
 
 namespace JSC {
@@ -51,8 +52,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     Jump string_failureCases2 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsStringVPtr));
 
     // Checks out okay! - get the length from the Ustring.
-    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSString, m_value) + OBJECT_OFFSETOF(UString, m_rep)), regT2);
-    load32(Address(regT2, OBJECT_OFFSETOF(UString::Rep, len)), regT2);
+    load32(Address(regT0, OBJECT_OFFSETOF(JSString, m_stringLength)), regT2);
 
     Jump string_failureCases3 = branch32(Above, regT2, Imm32(INT_MAX));
     move(regT2, regT0);
@@ -137,7 +137,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     loadPtr(Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_jitCode)), regT0);
     jump(regT0);
 
-#if PLATFORM(X86)
+#if CPU(X86) || CPU(ARM_TRADITIONAL)
     Label nativeCallThunk = align();
     preserveReturnAddressAfterCall(regT0);
     emitPutToCallFrameHeader(regT0, RegisterFile::ReturnPC); // Push return address
@@ -148,6 +148,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT1);
     emitPutToCallFrameHeader(regT1, RegisterFile::ScopeChain);
     
+#if CPU(X86)
     emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, regT0);
 
     /* We have two structs that we use to describe the stackframe we set up for our
@@ -159,7 +160,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
      * stack pointer by the right amount after the call.
      */
 
-#if COMPILER(MSVC) || PLATFORM(LINUX)
+#if COMPILER(MSVC) || OS(LINUX)
 #if COMPILER(MSVC)
 #pragma pack(push)
 #pragma pack(4)
@@ -222,7 +223,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     storePtr(regT2, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, thisValue) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
     storePtr(regT3, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, thisValue) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
 
-#if COMPILER(MSVC) || PLATFORM(LINUX)
+#if COMPILER(MSVC) || OS(LINUX)
     // ArgList is passed by reference so is stackPointerRegister + 4 * sizeof(Register)
     addPtr(Imm32(OBJECT_OFFSETOF(NativeCallFrameStructure, result)), stackPointerRegister, X86Registers::ecx);
 
@@ -247,6 +248,66 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     // so pull them off now
     addPtr(Imm32(NativeCallFrameSize - sizeof(NativeFunctionCalleeSignature)), stackPointerRegister);
 
+#elif CPU(ARM_TRADITIONAL)
+    emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, regT0);
+
+    // Allocate stack space for our arglist
+    COMPILE_ASSERT((sizeof(ArgList) & 0x7) == 0 && sizeof(JSValue) == 8 && sizeof(Register) == 8, ArgList_should_by_8byte_aligned);
+    subPtr(Imm32(sizeof(ArgList)), stackPointerRegister);
+
+    // Set up arguments
+    subPtr(Imm32(1), regT0); // Don't include 'this' in argcount
+
+    // Push argcount
+    storePtr(regT0, Address(stackPointerRegister, OBJECT_OFFSETOF(ArgList, m_argCount)));
+
+    // Calculate the start of the callframe header, and store in regT1
+    move(callFrameRegister, regT1);
+    sub32(Imm32(RegisterFile::CallFrameHeaderSize * (int32_t)sizeof(Register)), regT1);
+
+    // Calculate start of arguments as callframe header - sizeof(Register) * argcount (regT1)
+    mul32(Imm32(sizeof(Register)), regT0, regT0);
+    subPtr(regT0, regT1);
+
+    // push pointer to arguments
+    storePtr(regT1, Address(stackPointerRegister, OBJECT_OFFSETOF(ArgList, m_args)));
+
+    // Argument passing method:
+    // r0 - points to return value
+    // r1 - callFrame
+    // r2 - callee
+    // stack: this(JSValue) and a pointer to ArgList
+
+    move(stackPointerRegister, regT3);
+    subPtr(Imm32(8), stackPointerRegister);
+    move(stackPointerRegister, regT0);
+    subPtr(Imm32(8 + 4 + 4 /* padding */), stackPointerRegister);
+
+    // Setup arg4:
+    storePtr(regT3, Address(stackPointerRegister, 8));
+
+    // Setup arg3
+    // regT1 currently points to the first argument, regT1-sizeof(Register) points to 'this'
+    load32(Address(regT1, -(int32_t)sizeof(void*) * 2), regT3);
+    storePtr(regT3, Address(stackPointerRegister, 0));
+    load32(Address(regT1, -(int32_t)sizeof(void*)), regT3);
+    storePtr(regT3, Address(stackPointerRegister, 4));
+
+    // Setup arg2:
+    emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT2);
+
+    // Setup arg1:
+    move(callFrameRegister, regT1);
+
+    call(Address(regT2, OBJECT_OFFSETOF(JSFunction, m_data)));
+
+    // Load return value
+    load32(Address(stackPointerRegister, 16), regT0);
+    load32(Address(stackPointerRegister, 20), regT1);
+
+    addPtr(Imm32(sizeof(ArgList) + 16 + 8), stackPointerRegister);
+#endif
+
     // Check for an exception
     move(ImmPtr(&globalData->exception), regT2);
     Jump sawException = branch32(NotEqual, tagFor(0, regT2), Imm32(JSValue::EmptyValueTag));
@@ -267,7 +328,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT1);
     move(ImmPtr(&globalData->exceptionLocation), regT2);
     storePtr(regT1, regT2);
-    move(ImmPtr(reinterpret_cast<void*>(ctiVMThrowTrampoline)), regT2);
+    move(ImmPtr(FunctionPtr(ctiVMThrowTrampoline).value()), regT2);
     emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
     poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof (void*));
     restoreReturnAddressBeforeReturn(regT2);
@@ -345,59 +406,7 @@ void JIT::emit_op_end(Instruction* currentInstruction)
 void JIT::emit_op_jmp(Instruction* currentInstruction)
 {
     unsigned target = currentInstruction[1].u.operand;
-    addJump(jump(), target + 1);
-}
-
-void JIT::emit_op_loop(Instruction* currentInstruction)
-{
-    unsigned target = currentInstruction[1].u.operand;
-    emitTimeoutCheck();
-    addJump(jump(), target + 1);
-}
-
-void JIT::emit_op_loop_if_less(Instruction* currentInstruction)
-{
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
-    unsigned target = currentInstruction[3].u.operand;
-
-    emitTimeoutCheck();
-
-    if (isOperandConstantImmediateInt(op1)) {
-        emitLoad(op2, regT1, regT0);
-        addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(GreaterThan, regT0, Imm32(getConstantOperand(op1).asInt32())), target + 3);
-        return;
-    }
-    
-    if (isOperandConstantImmediateInt(op2)) {
-        emitLoad(op1, regT1, regT0);
-        addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(LessThan, regT0, Imm32(getConstantOperand(op2).asInt32())), target + 3);
-        return;
-    }
-
-    emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
-    addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
-    addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
-    addJump(branch32(LessThan, regT0, regT2), target + 3);
-}
-
-void JIT::emitSlow_op_loop_if_less(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
-    unsigned target = currentInstruction[3].u.operand;
-
-    if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
-        linkSlowCase(iter); // int32 check
-    linkSlowCase(iter); // int32 check
-
-    JITStubCall stubCall(this, cti_op_loop_if_less);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call();
-    emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 3);
+    addJump(jump(), target);
 }
 
 void JIT::emit_op_loop_if_lesseq(Instruction* currentInstruction)
@@ -411,21 +420,21 @@ void JIT::emit_op_loop_if_lesseq(Instruction* currentInstruction)
     if (isOperandConstantImmediateInt(op1)) {
         emitLoad(op2, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(GreaterThanOrEqual, regT0, Imm32(getConstantOperand(op1).asInt32())), target + 3);
+        addJump(branch32(GreaterThanOrEqual, regT0, Imm32(getConstantOperand(op1).asInt32())), target);
         return;
     }
 
     if (isOperandConstantImmediateInt(op2)) {
         emitLoad(op1, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
-        addJump(branch32(LessThanOrEqual, regT0, Imm32(getConstantOperand(op2).asInt32())), target + 3);
+        addJump(branch32(LessThanOrEqual, regT0, Imm32(getConstantOperand(op2).asInt32())), target);
         return;
     }
 
     emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
     addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
-    addJump(branch32(LessThanOrEqual, regT0, regT2), target + 3);
+    addJump(branch32(LessThanOrEqual, regT0, regT2), target);
 }
 
 void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
@@ -442,7 +451,7 @@ void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<Slo
     stubCall.addArgument(op1);
     stubCall.addArgument(op2);
     stubCall.call();
-    emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 3);
+    emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
 }
 
 void JIT::emit_op_new_object(Instruction* currentInstruction)
@@ -457,30 +466,20 @@ void JIT::emit_op_instanceof(Instruction* currentInstruction)
     unsigned baseVal = currentInstruction[3].u.operand;
     unsigned proto = currentInstruction[4].u.operand;
 
-    // Load the operands (baseVal, proto, and value respectively) into registers.
+    // Load the operands into registers.
     // We use regT0 for baseVal since we will be done with this first, and we can then use it for the result.
-    emitLoadPayload(proto, regT1);
-    emitLoadPayload(baseVal, regT0);
     emitLoadPayload(value, regT2);
+    emitLoadPayload(baseVal, regT0);
+    emitLoadPayload(proto, regT1);
 
-    // Check that baseVal & proto are cells.
-    emitJumpSlowCaseIfNotJSCell(proto);
+    // Check that value, baseVal, and proto are cells.
+    emitJumpSlowCaseIfNotJSCell(value);
     emitJumpSlowCaseIfNotJSCell(baseVal);
+    emitJumpSlowCaseIfNotJSCell(proto);
 
-    // Check that baseVal is an object, that it 'ImplementsHasInstance' but that it does not 'OverridesHasInstance'.
+    // Check that baseVal 'ImplementsDefaultHasInstance'.
     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
-    addSlowCase(branch32(NotEqual, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType))); // FIXME: Maybe remove this test.
-    addSlowCase(branchTest32(Zero, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(ImplementsHasInstance))); // FIXME: TOT checks ImplementsDefaultHasInstance.
-
-    // If value is not an Object, return false.
-    emitLoadTag(value, regT0);
-    Jump valueIsImmediate = branch32(NotEqual, regT0, Imm32(JSValue::CellTag));
-    loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
-    Jump valueIsNotObject = branch32(NotEqual, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType)); // FIXME: Maybe remove this test.
-
-    // Check proto is object.
-    loadPtr(Address(regT1, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
-    addSlowCase(branch32(NotEqual, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType)));
+    addSlowCase(branchTest32(Zero, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(ImplementsDefaultHasInstance)));
 
     // Optimistically load the result true, and start looping.
     // Initially, regT1 still contains proto and regT2 still contains value.
@@ -488,16 +487,14 @@ void JIT::emit_op_instanceof(Instruction* currentInstruction)
     move(Imm32(JSValue::TrueTag), regT0);
     Label loop(this);
 
-    // Load the prototype of the object in regT2.  If this is equal to regT1 - WIN!
+    // Load the prototype of the cell in regT2.  If this is equal to regT1 - WIN!
     // Otherwise, check if we've hit null - if we have then drop out of the loop, if not go again.
     loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
     load32(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT2);
     Jump isInstance = branchPtr(Equal, regT2, regT1);
-    branch32(NotEqual, regT2, Imm32(0), loop);
+    branchTest32(NonZero, regT2).linkTo(loop, this);
 
     // We get here either by dropping out of the loop, or if value was not an Object.  Result is false.
-    valueIsImmediate.link(this);
-    valueIsNotObject.link(this);
     move(Imm32(JSValue::FalseTag), regT0);
 
     // isInstance jumps right down to here, to skip setting the result to false (it has already set true).
@@ -512,11 +509,10 @@ void JIT::emitSlow_op_instanceof(Instruction* currentInstruction, Vector<SlowCas
     unsigned baseVal = currentInstruction[3].u.operand;
     unsigned proto = currentInstruction[4].u.operand;
 
+    linkSlowCaseIfNotJSCell(iter, value);
     linkSlowCaseIfNotJSCell(iter, baseVal);
     linkSlowCaseIfNotJSCell(iter, proto);
     linkSlowCase(iter);
-    linkSlowCase(iter);
-    linkSlowCase(iter);
 
     JITStubCall stubCall(this, cti_op_instanceof);
     stubCall.addArgument(value);
@@ -661,40 +657,6 @@ void JIT::emit_op_strcat(Instruction* currentInstruction)
     stubCall.call(currentInstruction[1].u.operand);
 }
 
-void JIT::emit_op_loop_if_true(Instruction* currentInstruction)
-{
-    unsigned cond = currentInstruction[1].u.operand;
-    unsigned target = currentInstruction[2].u.operand;
-
-    emitTimeoutCheck();
-
-    emitLoad(cond, regT1, regT0);
-
-    Jump isNotInteger = branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag));
-    addJump(branch32(NotEqual, regT0, Imm32(0)), target + 2);
-    Jump isNotZero = jump();
-
-    isNotInteger.link(this);
-
-    addJump(branch32(Equal, regT1, Imm32(JSValue::TrueTag)), target + 2);
-    addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::FalseTag)));
-
-    isNotZero.link(this);
-}
-
-void JIT::emitSlow_op_loop_if_true(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    unsigned cond = currentInstruction[1].u.operand;
-    unsigned target = currentInstruction[2].u.operand;
-
-    linkSlowCase(iter);
-
-    JITStubCall stubCall(this, cti_op_jtrue);
-    stubCall.addArgument(cond);
-    stubCall.call();
-    emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 2);
-}
-
 void JIT::emit_op_resolve_base(Instruction* currentInstruction)
 {
     JITStubCall stubCall(this, cti_op_resolve_base);
@@ -785,11 +747,11 @@ void JIT::emit_op_jfalse(Instruction* currentInstruction)
     emitLoad(cond, regT1, regT0);
 
     Jump isTrue = branch32(Equal, regT1, Imm32(JSValue::TrueTag));
-    addJump(branch32(Equal, regT1, Imm32(JSValue::FalseTag)), target + 2);
+    addJump(branch32(Equal, regT1, Imm32(JSValue::FalseTag)), target);
 
     Jump isNotInteger = branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag));
     Jump isTrue2 = branch32(NotEqual, regT0, Imm32(0));
-    addJump(jump(), target + 2);
+    addJump(jump(), target);
 
     if (supportsFloatingPoint()) {
         isNotInteger.link(this);
@@ -798,7 +760,7 @@ void JIT::emit_op_jfalse(Instruction* currentInstruction)
 
         zeroDouble(fpRegT0);
         emitLoadDouble(cond, fpRegT1);
-        addJump(branchDouble(DoubleEqual, fpRegT0, fpRegT1), target + 2);
+        addJump(branchDouble(DoubleEqualOrUnordered, fpRegT0, fpRegT1), target);
     } else
         addSlowCase(isNotInteger);
 
@@ -815,7 +777,7 @@ void JIT::emitSlow_op_jfalse(Instruction* currentInstruction, Vector<SlowCaseEnt
     JITStubCall stubCall(this, cti_op_jtrue);
     stubCall.addArgument(cond);
     stubCall.call();
-    emitJumpSlowToHot(branchTest32(Zero, regT0), target + 2); // Inverted.
+    emitJumpSlowToHot(branchTest32(Zero, regT0), target); // Inverted.
 }
 
 void JIT::emit_op_jtrue(Instruction* currentInstruction)
@@ -826,11 +788,11 @@ void JIT::emit_op_jtrue(Instruction* currentInstruction)
     emitLoad(cond, regT1, regT0);
 
     Jump isFalse = branch32(Equal, regT1, Imm32(JSValue::FalseTag));
-    addJump(branch32(Equal, regT1, Imm32(JSValue::TrueTag)), target + 2);
+    addJump(branch32(Equal, regT1, Imm32(JSValue::TrueTag)), target);
 
     Jump isNotInteger = branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag));
     Jump isFalse2 = branch32(Equal, regT0, Imm32(0));
-    addJump(jump(), target + 2);
+    addJump(jump(), target);
 
     if (supportsFloatingPoint()) {
         isNotInteger.link(this);
@@ -839,7 +801,7 @@ void JIT::emit_op_jtrue(Instruction* currentInstruction)
 
         zeroDouble(fpRegT0);
         emitLoadDouble(cond, fpRegT1);
-        addJump(branchDouble(DoubleNotEqual, fpRegT0, fpRegT1), target + 2);
+        addJump(branchDouble(DoubleNotEqual, fpRegT0, fpRegT1), target);
     } else
         addSlowCase(isNotInteger);
 
@@ -856,7 +818,7 @@ void JIT::emitSlow_op_jtrue(Instruction* currentInstruction, Vector<SlowCaseEntr
     JITStubCall stubCall(this, cti_op_jtrue);
     stubCall.addArgument(cond);
     stubCall.call();
-    emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 2);
+    emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
 }
 
 void JIT::emit_op_jeq_null(Instruction* currentInstruction)
@@ -870,7 +832,7 @@ void JIT::emit_op_jeq_null(Instruction* currentInstruction)
 
     // First, handle JSCell cases - check MasqueradesAsUndefined bit on the structure.
     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-    addJump(branchTest32(NonZero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target + 2);
+    addJump(branchTest32(NonZero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target);
 
     Jump wasNotImmediate = jump();
 
@@ -881,7 +843,7 @@ void JIT::emit_op_jeq_null(Instruction* currentInstruction)
     set32(Equal, regT1, Imm32(JSValue::UndefinedTag), regT1);
     or32(regT2, regT1);
 
-    addJump(branchTest32(NonZero, regT1), target + 2);
+    addJump(branchTest32(NonZero, regT1), target);
 
     wasNotImmediate.link(this);
 }
@@ -897,7 +859,7 @@ void JIT::emit_op_jneq_null(Instruction* currentInstruction)
 
     // First, handle JSCell cases - check MasqueradesAsUndefined bit on the structure.
     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-    addJump(branchTest32(Zero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target + 2);
+    addJump(branchTest32(Zero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target);
 
     Jump wasNotImmediate = jump();
 
@@ -908,7 +870,7 @@ void JIT::emit_op_jneq_null(Instruction* currentInstruction)
     set32(Equal, regT1, Imm32(JSValue::UndefinedTag), regT1);
     or32(regT2, regT1);
 
-    addJump(branchTest32(Zero, regT1), target + 2);
+    addJump(branchTest32(Zero, regT1), target);
 
     wasNotImmediate.link(this);
 }
@@ -920,8 +882,8 @@ void JIT::emit_op_jneq_ptr(Instruction* currentInstruction)
     unsigned target = currentInstruction[3].u.operand;
 
     emitLoad(src, regT1, regT0);
-    addJump(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)), target + 3);
-    addJump(branchPtr(NotEqual, regT0, ImmPtr(ptr)), target + 3);
+    addJump(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)), target);
+    addJump(branchPtr(NotEqual, regT0, ImmPtr(ptr)), target);
 }
 
 void JIT::emit_op_jsr(Instruction* currentInstruction)
@@ -929,7 +891,7 @@ void JIT::emit_op_jsr(Instruction* currentInstruction)
     int retAddrDst = currentInstruction[1].u.operand;
     int target = currentInstruction[2].u.operand;
     DataLabelPtr storeLocation = storePtrWithPatch(ImmPtr(0), Address(callFrameRegister, sizeof(Register) * retAddrDst));
-    addJump(jump(), target + 2);
+    addJump(jump(), target);
     m_jsrSites.append(JSRInfo(storeLocation, label()));
 }
 
@@ -1195,23 +1157,109 @@ void JIT::emit_op_throw(Instruction* currentInstruction)
 #endif
 }
 
+void JIT::emit_op_get_pnames(Instruction* currentInstruction)
+{
+    int dst = currentInstruction[1].u.operand;
+    int base = currentInstruction[2].u.operand;
+    int i = currentInstruction[3].u.operand;
+    int size = currentInstruction[4].u.operand;
+    int breakTarget = currentInstruction[5].u.operand;
+
+    JumpList isNotObject;
+
+    emitLoad(base, regT1, regT0);
+    if (!m_codeBlock->isKnownNotImmediate(base))
+        isNotObject.append(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
+    if (base != m_codeBlock->thisRegister()) {
+        loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+        isNotObject.append(branch32(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType)));
+    }
+
+    // We could inline the case where you have a valid cache, but
+    // this call doesn't seem to be hot.
+    Label isObject(this);
+    JITStubCall getPnamesStubCall(this, cti_op_get_pnames);
+    getPnamesStubCall.addArgument(regT0);
+    getPnamesStubCall.call(dst);
+    load32(Address(regT0, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStringsSize)), regT3);
+    store32(Imm32(0), addressFor(i));
+    store32(regT3, addressFor(size));
+    Jump end = jump();
+
+    isNotObject.link(this);
+    addJump(branch32(Equal, regT1, Imm32(JSValue::NullTag)), breakTarget);
+    addJump(branch32(Equal, regT1, Imm32(JSValue::UndefinedTag)), breakTarget);
+    JITStubCall toObjectStubCall(this, cti_to_object);
+    toObjectStubCall.addArgument(regT1, regT0);
+    toObjectStubCall.call(base);
+    jump().linkTo(isObject, this);
+    
+    end.link(this);
+}
+
 void JIT::emit_op_next_pname(Instruction* currentInstruction)
 {
     int dst = currentInstruction[1].u.operand;
-    int iter = currentInstruction[2].u.operand;
-    int target = currentInstruction[3].u.operand;
+    int base = currentInstruction[2].u.operand;
+    int i = currentInstruction[3].u.operand;
+    int size = currentInstruction[4].u.operand;
+    int it = currentInstruction[5].u.operand;
+    int target = currentInstruction[6].u.operand;
+    
+    JumpList callHasProperty;
+
+    Label begin(this);
+    load32(addressFor(i), regT0);
+    Jump end = branch32(Equal, regT0, addressFor(size));
+
+    // Grab key @ i
+    loadPtr(addressFor(it), regT1);
+    loadPtr(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStrings)), regT2);
+    load32(BaseIndex(regT2, regT0, TimesEight), regT2);
+    store32(Imm32(JSValue::CellTag), tagFor(dst));
+    store32(regT2, payloadFor(dst));
+
+    // Increment i
+    add32(Imm32(1), regT0);
+    store32(regT0, addressFor(i));
+
+    // Verify that i is valid:
+    loadPtr(addressFor(base), regT0);
+
+    // Test base's structure
+    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+    callHasProperty.append(branchPtr(NotEqual, regT2, Address(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure)))));
+
+    // Test base's prototype chain
+    loadPtr(Address(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedPrototypeChain))), regT3);
+    loadPtr(Address(regT3, OBJECT_OFFSETOF(StructureChain, m_vector)), regT3);
+    addJump(branchTestPtr(Zero, Address(regT3)), target);
+
+    Label checkPrototype(this);
+    callHasProperty.append(branch32(Equal, Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), Imm32(JSValue::NullTag)));
+    loadPtr(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT2);
+    loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+    callHasProperty.append(branchPtr(NotEqual, regT2, Address(regT3)));
+    addPtr(Imm32(sizeof(Structure*)), regT3);
+    branchTestPtr(NonZero, Address(regT3)).linkTo(checkPrototype, this);
 
-    load32(Address(callFrameRegister, (iter * sizeof(Register))), regT0);
+    // Continue loop.
+    addJump(jump(), target);
 
-    JITStubCall stubCall(this, cti_op_next_pname);
+    // Slow case: Ask the object if i is valid.
+    callHasProperty.link(this);
+    loadPtr(addressFor(dst), regT1);
+    JITStubCall stubCall(this, cti_has_property);
     stubCall.addArgument(regT0);
+    stubCall.addArgument(regT1);
     stubCall.call();
 
-    Jump endOfIter = branchTestPtr(Zero, regT0);
-    emitStore(dst, regT1, regT0);
-    map(m_bytecodeIndex + OPCODE_LENGTH(op_next_pname), dst, regT1, regT0);
-    addJump(jump(), target + 3);
-    endOfIter.link(this);
+    // Test for valid key.
+    addJump(branchTest32(NonZero, regT0), target);
+    jump().linkTo(begin, this);
+
+    // End of loop.
+    end.link(this);
 }
 
 void JIT::emit_op_push_scope(Instruction* currentInstruction)
@@ -1286,7 +1334,7 @@ void JIT::emit_op_jmp_scopes(Instruction* currentInstruction)
     JITStubCall stubCall(this, cti_op_jmp_scopes);
     stubCall.addArgument(Imm32(currentInstruction[1].u.operand));
     stubCall.call();
-    addJump(jump(), currentInstruction[2].u.operand + 2);
+    addJump(jump(), currentInstruction[2].u.operand);
 }
 
 void JIT::emit_op_switch_imm(Instruction* currentInstruction)
@@ -1361,7 +1409,6 @@ void JIT::emit_op_debug(Instruction* currentInstruction)
     stubCall.addArgument(Imm32(currentInstruction[1].u.operand));
     stubCall.addArgument(Imm32(currentInstruction[2].u.operand));
     stubCall.addArgument(Imm32(currentInstruction[3].u.operand));
-    stubCall.addArgument(Imm32(currentInstruction[4].u.operand));
     stubCall.call();
 }
 
@@ -1464,8 +1511,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     Jump string_failureCases2 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsStringVPtr));
 
     // Checks out okay! - get the length from the Ustring.
-    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSString, m_value) + OBJECT_OFFSETOF(UString, m_rep)), regT0);
-    load32(Address(regT0, OBJECT_OFFSETOF(UString::Rep, len)), regT0);
+    load32(Address(regT0, OBJECT_OFFSETOF(JSString, m_stringLength)), regT0);
 
     Jump string_failureCases3 = branch32(Above, regT0, Imm32(JSImmediate::maxImmediateInt));
 
@@ -1560,7 +1606,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     emitPutToCallFrameHeader(regT1, RegisterFile::ScopeChain);
     
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, X86Registers::ecx);
 
     // Allocate stack space for our arglist
@@ -1596,7 +1642,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     call(Address(X86Registers::esi, OBJECT_OFFSETOF(JSFunction, m_data)));
     
     addPtr(Imm32(sizeof(ArgList)), stackPointerRegister);
-#elif PLATFORM(X86)
+#elif CPU(X86)
     emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, regT0);
 
     /* We have two structs that we use to describe the stackframe we set up for our
@@ -1607,7 +1653,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
      * not the rest of the callframe so we need a nice way to ensure we increment the
      * stack pointer by the right amount after the call.
      */
-#if COMPILER(MSVC) || PLATFORM(LINUX)
+#if COMPILER(MSVC) || OS(LINUX)
     struct NativeCallFrameStructure {
       //  CallFrame* callFrame; // passed in EDX
         JSObject* callee;
@@ -1660,7 +1706,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     loadPtr(Address(regT1, -(int)sizeof(Register)), regT1);
     storePtr(regT1, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, thisValue)));
 
-#if COMPILER(MSVC) || PLATFORM(LINUX)
+#if COMPILER(MSVC) || OS(LINUX)
     // ArgList is passed by reference so is stackPointerRegister + 4 * sizeof(Register)
     addPtr(Imm32(OBJECT_OFFSETOF(NativeCallFrameStructure, result)), stackPointerRegister, X86Registers::ecx);
 
@@ -1688,7 +1734,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     // so pull them off now
     addPtr(Imm32(NativeCallFrameSize - sizeof(NativeFunctionCalleeSignature)), stackPointerRegister);
 
-#elif PLATFORM(ARM_TRADITIONAL)
+#elif CPU(ARM)
     emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, regT0);
 
     // Allocate stack space for our arglist
@@ -1722,9 +1768,8 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     move(callFrameRegister, regT0);
 
     // Setup arg4: This is a plain hack
-    move(stackPointerRegister, ARMRegisters::S0);
+    move(stackPointerRegister, ARMRegisters::r3);
 
-    move(ctiReturnRegister, ARMRegisters::lr);
     call(Address(regT1, OBJECT_OFFSETOF(JSFunction, m_data)));
 
     addPtr(Imm32(sizeof(ArgList)), stackPointerRegister);
@@ -1755,7 +1800,7 @@ void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executable
     emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT1);
     move(ImmPtr(&globalData->exceptionLocation), regT2);
     storePtr(regT1, regT2);
-    move(ImmPtr(reinterpret_cast<void*>(ctiVMThrowTrampoline)), regT2);
+    move(ImmPtr(FunctionPtr(ctiVMThrowTrampoline).value()), regT2);
     emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
     poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof (void*));
     restoreReturnAddressBeforeReturn(regT2);
@@ -1831,49 +1876,8 @@ void JIT::emit_op_end(Instruction* currentInstruction)
 void JIT::emit_op_jmp(Instruction* currentInstruction)
 {
     unsigned target = currentInstruction[1].u.operand;
-    addJump(jump(), target + 1);
-    RECORD_JUMP_TARGET(target + 1);
-}
-
-void JIT::emit_op_loop(Instruction* currentInstruction)
-{
-    emitTimeoutCheck();
-
-    unsigned target = currentInstruction[1].u.operand;
-    addJump(jump(), target + 1);
-}
-
-void JIT::emit_op_loop_if_less(Instruction* currentInstruction)
-{
-    emitTimeoutCheck();
-
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
-    unsigned target = currentInstruction[3].u.operand;
-    if (isOperandConstantImmediateInt(op2)) {
-        emitGetVirtualRegister(op1, regT0);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
-        int32_t op2imm = getConstantOperandImmediateInt(op2);
-#else
-        int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
-#endif
-        addJump(branch32(LessThan, regT0, Imm32(op2imm)), target + 3);
-    } else if (isOperandConstantImmediateInt(op1)) {
-        emitGetVirtualRegister(op2, regT0);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
-        int32_t op1imm = getConstantOperandImmediateInt(op1);
-#else
-        int32_t op1imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)));
-#endif
-        addJump(branch32(GreaterThan, regT0, Imm32(op1imm)), target + 3);
-    } else {
-        emitGetVirtualRegisters(op1, regT0, op2, regT1);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-        emitJumpSlowCaseIfNotImmediateInteger(regT1);
-        addJump(branch32(LessThan, regT0, regT1), target + 3);
-    }
+    addJump(jump(), target);
+    RECORD_JUMP_TARGET(target);
 }
 
 void JIT::emit_op_loop_if_lesseq(Instruction* currentInstruction)
@@ -1891,12 +1895,12 @@ void JIT::emit_op_loop_if_lesseq(Instruction* currentInstruction)
 #else
         int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
 #endif
-        addJump(branch32(LessThanOrEqual, regT0, Imm32(op2imm)), target + 3);
+        addJump(branch32(LessThanOrEqual, regT0, Imm32(op2imm)), target);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
-        addJump(branch32(LessThanOrEqual, regT0, regT1), target + 3);
+        addJump(branch32(LessThanOrEqual, regT0, regT1), target);
     }
 }
 
@@ -1907,30 +1911,26 @@ void JIT::emit_op_new_object(Instruction* currentInstruction)
 
 void JIT::emit_op_instanceof(Instruction* currentInstruction)
 {
+    unsigned dst = currentInstruction[1].u.operand;
+    unsigned value = currentInstruction[2].u.operand;
+    unsigned baseVal = currentInstruction[3].u.operand;
+    unsigned proto = currentInstruction[4].u.operand;
+
     // Load the operands (baseVal, proto, and value respectively) into registers.
     // We use regT0 for baseVal since we will be done with this first, and we can then use it for the result.
-    emitGetVirtualRegister(currentInstruction[3].u.operand, regT0);
-    emitGetVirtualRegister(currentInstruction[4].u.operand, regT1);
-    emitGetVirtualRegister(currentInstruction[2].u.operand, regT2);
+    emitGetVirtualRegister(value, regT2);
+    emitGetVirtualRegister(baseVal, regT0);
+    emitGetVirtualRegister(proto, regT1);
 
     // Check that baseVal & proto are cells.
-    emitJumpSlowCaseIfNotJSCell(regT0);
-    emitJumpSlowCaseIfNotJSCell(regT1);
+    emitJumpSlowCaseIfNotJSCell(regT2, value);
+    emitJumpSlowCaseIfNotJSCell(regT0, baseVal);
+    emitJumpSlowCaseIfNotJSCell(regT1, proto);
 
-    // Check that baseVal is an object, that it 'ImplementsHasInstance' but that it does not 'OverridesHasInstance'.
+    // Check that baseVal 'ImplementsDefaultHasInstance'.
     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
-    addSlowCase(branch32(NotEqual, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType)));
     addSlowCase(branchTest32(Zero, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(ImplementsDefaultHasInstance)));
 
-    // If value is not an Object, return false.
-    Jump valueIsImmediate = emitJumpIfNotJSCell(regT2);
-    loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
-    Jump valueIsNotObject = branch32(NotEqual, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType));
-
-    // Check proto is object.
-    loadPtr(Address(regT1, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
-    addSlowCase(branch32(NotEqual, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType)));
-
     // Optimistically load the result true, and start looping.
     // Initially, regT1 still contains proto and regT2 still contains value.
     // As we loop regT2 will be updated with its prototype, recursively walking the prototype chain.
@@ -1942,16 +1942,14 @@ void JIT::emit_op_instanceof(Instruction* currentInstruction)
     loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
     loadPtr(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype)), regT2);
     Jump isInstance = branchPtr(Equal, regT2, regT1);
-    branchPtr(NotEqual, regT2, ImmPtr(JSValue::encode(jsNull())), loop);
+    emitJumpIfJSCell(regT2).linkTo(loop, this);
 
     // We get here either by dropping out of the loop, or if value was not an Object.  Result is false.
-    valueIsImmediate.link(this);
-    valueIsNotObject.link(this);
     move(ImmPtr(JSValue::encode(jsBoolean(false))), regT0);
 
     // isInstance jumps right down to here, to skip setting the result to false (it has already set true).
     isInstance.link(this);
-    emitPutVirtualRegister(currentInstruction[1].u.operand);
+    emitPutVirtualRegister(dst);
 }
 
 void JIT::emit_op_new_func(Instruction* currentInstruction)
@@ -2125,21 +2123,6 @@ void JIT::emit_op_strcat(Instruction* currentInstruction)
     stubCall.call(currentInstruction[1].u.operand);
 }
 
-void JIT::emit_op_loop_if_true(Instruction* currentInstruction)
-{
-    emitTimeoutCheck();
-
-    unsigned target = currentInstruction[2].u.operand;
-    emitGetVirtualRegister(currentInstruction[1].u.operand, regT0);
-
-    Jump isZero = branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsNumber(m_globalData, 0))));
-    addJump(emitJumpIfImmediateInteger(regT0), target + 2);
-
-    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsBoolean(true)))), target + 2);
-    addSlowCase(branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(jsBoolean(false)))));
-
-    isZero.link(this);
-};
 void JIT::emit_op_resolve_base(Instruction* currentInstruction)
 {
     JITStubCall stubCall(this, cti_op_resolve_base);
@@ -2202,14 +2185,14 @@ void JIT::emit_op_jfalse(Instruction* currentInstruction)
     unsigned target = currentInstruction[2].u.operand;
     emitGetVirtualRegister(currentInstruction[1].u.operand, regT0);
 
-    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsNumber(m_globalData, 0)))), target + 2);
+    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsNumber(m_globalData, 0)))), target);
     Jump isNonZero = emitJumpIfImmediateInteger(regT0);
 
-    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsBoolean(false)))), target + 2);
+    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsBoolean(false)))), target);
     addSlowCase(branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(jsBoolean(true)))));
 
     isNonZero.link(this);
-    RECORD_JUMP_TARGET(target + 2);
+    RECORD_JUMP_TARGET(target);
 };
 void JIT::emit_op_jeq_null(Instruction* currentInstruction)
 {
@@ -2221,16 +2204,16 @@ void JIT::emit_op_jeq_null(Instruction* currentInstruction)
 
     // First, handle JSCell cases - check MasqueradesAsUndefined bit on the structure.
     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-    addJump(branchTest32(NonZero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target + 2);
+    addJump(branchTest32(NonZero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target);
     Jump wasNotImmediate = jump();
 
     // Now handle the immediate cases - undefined & null
     isImmediate.link(this);
     andPtr(Imm32(~JSImmediate::ExtendedTagBitUndefined), regT0);
-    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsNull()))), target + 2);            
+    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsNull()))), target);            
 
     wasNotImmediate.link(this);
-    RECORD_JUMP_TARGET(target + 2);
+    RECORD_JUMP_TARGET(target);
 };
 void JIT::emit_op_jneq_null(Instruction* currentInstruction)
 {
@@ -2242,16 +2225,16 @@ void JIT::emit_op_jneq_null(Instruction* currentInstruction)
 
     // First, handle JSCell cases - check MasqueradesAsUndefined bit on the structure.
     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-    addJump(branchTest32(Zero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target + 2);
+    addJump(branchTest32(Zero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target);
     Jump wasNotImmediate = jump();
 
     // Now handle the immediate cases - undefined & null
     isImmediate.link(this);
     andPtr(Imm32(~JSImmediate::ExtendedTagBitUndefined), regT0);
-    addJump(branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(jsNull()))), target + 2);            
+    addJump(branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(jsNull()))), target);            
 
     wasNotImmediate.link(this);
-    RECORD_JUMP_TARGET(target + 2);
+    RECORD_JUMP_TARGET(target);
 }
 
 void JIT::emit_op_jneq_ptr(Instruction* currentInstruction)
@@ -2261,9 +2244,9 @@ void JIT::emit_op_jneq_ptr(Instruction* currentInstruction)
     unsigned target = currentInstruction[3].u.operand;
     
     emitGetVirtualRegister(src, regT0);
-    addJump(branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(JSValue(ptr)))), target + 3);            
+    addJump(branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(JSValue(ptr)))), target);            
 
-    RECORD_JUMP_TARGET(target + 3);
+    RECORD_JUMP_TARGET(target);
 }
 
 void JIT::emit_op_jsr(Instruction* currentInstruction)
@@ -2271,10 +2254,10 @@ void JIT::emit_op_jsr(Instruction* currentInstruction)
     int retAddrDst = currentInstruction[1].u.operand;
     int target = currentInstruction[2].u.operand;
     DataLabelPtr storeLocation = storePtrWithPatch(ImmPtr(0), Address(callFrameRegister, sizeof(Register) * retAddrDst));
-    addJump(jump(), target + 2);
+    addJump(jump(), target);
     m_jsrSites.append(JSRInfo(storeLocation, label()));
     killLastResultRegister();
-    RECORD_JUMP_TARGET(target + 2);
+    RECORD_JUMP_TARGET(target);
 }
 
 void JIT::emit_op_sret(Instruction* currentInstruction)
@@ -2326,13 +2309,13 @@ void JIT::emit_op_jtrue(Instruction* currentInstruction)
     emitGetVirtualRegister(currentInstruction[1].u.operand, regT0);
 
     Jump isZero = branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsNumber(m_globalData, 0))));
-    addJump(emitJumpIfImmediateInteger(regT0), target + 2);
+    addJump(emitJumpIfImmediateInteger(regT0), target);
 
-    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsBoolean(true)))), target + 2);
+    addJump(branchPtr(Equal, regT0, ImmPtr(JSValue::encode(jsBoolean(true)))), target);
     addSlowCase(branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(jsBoolean(false)))));
 
     isZero.link(this);
-    RECORD_JUMP_TARGET(target + 2);
+    RECORD_JUMP_TARGET(target);
 }
 
 void JIT::emit_op_neq(Instruction* currentInstruction)
@@ -2383,15 +2366,116 @@ void JIT::emit_op_throw(Instruction* currentInstruction)
 #endif
 }
 
+void JIT::emit_op_get_pnames(Instruction* currentInstruction)
+{
+    int dst = currentInstruction[1].u.operand;
+    int base = currentInstruction[2].u.operand;
+    int i = currentInstruction[3].u.operand;
+    int size = currentInstruction[4].u.operand;
+    int breakTarget = currentInstruction[5].u.operand;
+
+    JumpList isNotObject;
+
+    emitGetVirtualRegister(base, regT0);
+    if (!m_codeBlock->isKnownNotImmediate(base))
+        isNotObject.append(emitJumpIfNotJSCell(regT0));
+    if (base != m_codeBlock->thisRegister()) {
+        loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+        isNotObject.append(branch32(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType)));
+    }
+
+    // We could inline the case where you have a valid cache, but
+    // this call doesn't seem to be hot.
+    Label isObject(this);
+    JITStubCall getPnamesStubCall(this, cti_op_get_pnames);
+    getPnamesStubCall.addArgument(regT0);
+    getPnamesStubCall.call(dst);
+    load32(Address(regT0, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStringsSize)), regT3);
+    store32(Imm32(0), addressFor(i));
+    store32(regT3, addressFor(size));
+    Jump end = jump();
+
+    isNotObject.link(this);
+    move(regT0, regT1);
+    and32(Imm32(~JSImmediate::ExtendedTagBitUndefined), regT1);
+    addJump(branch32(Equal, regT1, Imm32(JSImmediate::FullTagTypeNull)), breakTarget);
+
+    JITStubCall toObjectStubCall(this, cti_to_object);
+    toObjectStubCall.addArgument(regT0);
+    toObjectStubCall.call(base);
+    jump().linkTo(isObject, this);
+    
+    end.link(this);
+}
+
 void JIT::emit_op_next_pname(Instruction* currentInstruction)
 {
-    JITStubCall stubCall(this, cti_op_next_pname);
-    stubCall.addArgument(currentInstruction[2].u.operand, regT2);
+    int dst = currentInstruction[1].u.operand;
+    int base = currentInstruction[2].u.operand;
+    int i = currentInstruction[3].u.operand;
+    int size = currentInstruction[4].u.operand;
+    int it = currentInstruction[5].u.operand;
+    int target = currentInstruction[6].u.operand;
+    
+    JumpList callHasProperty;
+
+    Label begin(this);
+    load32(addressFor(i), regT0);
+    Jump end = branch32(Equal, regT0, addressFor(size));
+
+    // Grab key @ i
+    loadPtr(addressFor(it), regT1);
+    loadPtr(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStrings)), regT2);
+
+#if USE(JSVALUE64)
+    loadPtr(BaseIndex(regT2, regT0, TimesEight), regT2);
+#else
+    loadPtr(BaseIndex(regT2, regT0, TimesFour), regT2);
+#endif
+
+    emitPutVirtualRegister(dst, regT2);
+
+    // Increment i
+    add32(Imm32(1), regT0);
+    store32(regT0, addressFor(i));
+
+    // Verify that i is valid:
+    emitGetVirtualRegister(base, regT0);
+
+    // Test base's structure
+    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+    callHasProperty.append(branchPtr(NotEqual, regT2, Address(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure)))));
+
+    // Test base's prototype chain
+    loadPtr(Address(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedPrototypeChain))), regT3);
+    loadPtr(Address(regT3, OBJECT_OFFSETOF(StructureChain, m_vector)), regT3);
+    addJump(branchTestPtr(Zero, Address(regT3)), target);
+
+    Label checkPrototype(this);
+    loadPtr(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype)), regT2);
+    callHasProperty.append(emitJumpIfNotJSCell(regT2));
+    loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+    callHasProperty.append(branchPtr(NotEqual, regT2, Address(regT3)));
+    addPtr(Imm32(sizeof(Structure*)), regT3);
+    branchTestPtr(NonZero, Address(regT3)).linkTo(checkPrototype, this);
+
+    // Continue loop.
+    addJump(jump(), target);
+
+    // Slow case: Ask the object if i is valid.
+    callHasProperty.link(this);
+    emitGetVirtualRegister(dst, regT1);
+    JITStubCall stubCall(this, cti_has_property);
+    stubCall.addArgument(regT0);
+    stubCall.addArgument(regT1);
     stubCall.call();
-    Jump endOfIter = branchTestPtr(Zero, regT0);
-    emitPutVirtualRegister(currentInstruction[1].u.operand);
-    addJump(jump(), currentInstruction[3].u.operand + 3);
-    endOfIter.link(this);
+
+    // Test for valid key.
+    addJump(branchTest32(NonZero, regT0), target);
+    jump().linkTo(begin, this);
+
+    // End of loop.
+    end.link(this);
 }
 
 void JIT::emit_op_push_scope(Instruction* currentInstruction)
@@ -2480,8 +2564,8 @@ void JIT::emit_op_jmp_scopes(Instruction* currentInstruction)
     JITStubCall stubCall(this, cti_op_jmp_scopes);
     stubCall.addArgument(Imm32(currentInstruction[1].u.operand));
     stubCall.call();
-    addJump(jump(), currentInstruction[2].u.operand + 2);
-    RECORD_JUMP_TARGET(currentInstruction[2].u.operand + 2);
+    addJump(jump(), currentInstruction[2].u.operand);
+    RECORD_JUMP_TARGET(currentInstruction[2].u.operand);
 }
 
 void JIT::emit_op_switch_imm(Instruction* currentInstruction)
@@ -2552,7 +2636,6 @@ void JIT::emit_op_debug(Instruction* currentInstruction)
     stubCall.addArgument(Imm32(currentInstruction[1].u.operand));
     stubCall.addArgument(Imm32(currentInstruction[2].u.operand));
     stubCall.addArgument(Imm32(currentInstruction[3].u.operand));
-    stubCall.addArgument(Imm32(currentInstruction[4].u.operand));
     stubCall.call();
 }
 
@@ -2724,36 +2807,6 @@ void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector<SlowCas
     stubCall.call(dst);
 }
 
-void JIT::emitSlow_op_loop_if_less(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
-    unsigned target = currentInstruction[3].u.operand;
-    if (isOperandConstantImmediateInt(op2)) {
-        linkSlowCase(iter);
-        JITStubCall stubCall(this, cti_op_loop_if_less);
-        stubCall.addArgument(regT0);
-        stubCall.addArgument(op2, regT2);
-        stubCall.call();
-        emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 3);
-    } else if (isOperandConstantImmediateInt(op1)) {
-        linkSlowCase(iter);
-        JITStubCall stubCall(this, cti_op_loop_if_less);
-        stubCall.addArgument(op1, regT2);
-        stubCall.addArgument(regT0);
-        stubCall.call();
-        emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 3);
-    } else {
-        linkSlowCase(iter);
-        linkSlowCase(iter);
-        JITStubCall stubCall(this, cti_op_loop_if_less);
-        stubCall.addArgument(regT0);
-        stubCall.addArgument(regT1);
-        stubCall.call();
-        emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 3);
-    }
-}
-
 void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
     unsigned op2 = currentInstruction[2].u.operand;
@@ -2764,7 +2817,7 @@ void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<Slo
         stubCall.addArgument(regT0);
         stubCall.addArgument(currentInstruction[2].u.operand, regT2);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
     } else {
         linkSlowCase(iter);
         linkSlowCase(iter);
@@ -2772,7 +2825,7 @@ void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<Slo
         stubCall.addArgument(regT0);
         stubCall.addArgument(regT1);
         stubCall.call();
-        emitJumpSlowToHot(branchTest32(NonZero, regT0), target + 3);
+        emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
     }
 }
 
@@ -2794,15 +2847,6 @@ void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector<SlowCas
     stubPutByValCall.call();
 }
 
-void JIT::emitSlow_op_loop_if_true(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    linkSlowCase(iter);
-    JITStubCall stubCall(this, cti_op_jtrue);
-    stubCall.addArgument(regT0);
-    stubCall.call();
-    emitJumpSlowToHot(branchTest32(NonZero, regT0), currentInstruction[2].u.operand + 2);
-}
-
 void JIT::emitSlow_op_not(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
     linkSlowCase(iter);
@@ -2818,7 +2862,7 @@ void JIT::emitSlow_op_jfalse(Instruction* currentInstruction, Vector<SlowCaseEnt
     JITStubCall stubCall(this, cti_op_jtrue);
     stubCall.addArgument(regT0);
     stubCall.call();
-    emitJumpSlowToHot(branchTest32(Zero, regT0), currentInstruction[2].u.operand + 2); // inverted!
+    emitJumpSlowToHot(branchTest32(Zero, regT0), currentInstruction[2].u.operand); // inverted!
 }
 
 void JIT::emitSlow_op_bitnot(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
@@ -2835,7 +2879,7 @@ void JIT::emitSlow_op_jtrue(Instruction* currentInstruction, Vector<SlowCaseEntr
     JITStubCall stubCall(this, cti_op_jtrue);
     stubCall.addArgument(regT0);
     stubCall.call();
-    emitJumpSlowToHot(branchTest32(NonZero, regT0), currentInstruction[2].u.operand + 2);
+    emitJumpSlowToHot(branchTest32(NonZero, regT0), currentInstruction[2].u.operand);
 }
 
 void JIT::emitSlow_op_bitxor(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
@@ -2901,16 +2945,20 @@ void JIT::emitSlow_op_nstricteq(Instruction* currentInstruction, Vector<SlowCase
 
 void JIT::emitSlow_op_instanceof(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    linkSlowCase(iter);
-    linkSlowCase(iter);
-    linkSlowCase(iter);
-    linkSlowCase(iter);
+    unsigned dst = currentInstruction[1].u.operand;
+    unsigned value = currentInstruction[2].u.operand;
+    unsigned baseVal = currentInstruction[3].u.operand;
+    unsigned proto = currentInstruction[4].u.operand;
+
+    linkSlowCaseIfNotJSCell(iter, value);
+    linkSlowCaseIfNotJSCell(iter, baseVal);
+    linkSlowCaseIfNotJSCell(iter, proto);
     linkSlowCase(iter);
     JITStubCall stubCall(this, cti_op_instanceof);
-    stubCall.addArgument(currentInstruction[2].u.operand, regT2);
-    stubCall.addArgument(currentInstruction[3].u.operand, regT2);
-    stubCall.addArgument(currentInstruction[4].u.operand, regT2);
-    stubCall.call(currentInstruction[1].u.operand);
+    stubCall.addArgument(value, regT2);
+    stubCall.addArgument(baseVal, regT2);
+    stubCall.addArgument(proto, regT2);
+    stubCall.call(dst);
 }
 
 void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITPropertyAccess.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITPropertyAccess.cpp
index 9edfd01..ef95f99 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITPropertyAccess.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITPropertyAccess.cpp
@@ -33,6 +33,7 @@
 #include "JITStubCall.h"
 #include "JSArray.h"
 #include "JSFunction.h"
+#include "JSPropertyNameIterator.h"
 #include "Interpreter.h"
 #include "LinkBuffer.h"
 #include "RepatchBuffer.h"
@@ -211,12 +212,17 @@ void JIT::emit_op_method_check(Instruction* currentInstruction)
     emitLoad(base, regT1, regT0);
     emitJumpSlowCaseIfNotJSCell(base, regT1);
 
+    BEGIN_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
+
     Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), info.structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
     DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(ImmPtr(0), regT2);
     Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), protoStructureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
 
     // This will be relinked to load the function without doing a load.
     DataLabelPtr putFunction = moveWithPatch(ImmPtr(0), regT0);
+ 
+    END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
+    
     move(Imm32(JSValue::CellTag), regT1);
     Jump match = jump();
 
@@ -373,6 +379,9 @@ void JIT::compileGetByIdHotPath()
     // Additionally, for get_by_id we need patch the offset of the branch to the slow case (we patch this to jump
     // to array-length / prototype access tranpolines, and finally we also the the property-map access offset as a label
     // to jump back to if one of these trampolies finds a match.
+
+    BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
+    
     Label hotPathBegin(this);
     m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
     m_propertyAccessInstructionIndex++;
@@ -395,6 +404,8 @@ void JIT::compileGetByIdHotPath()
 
     Label putResult(this);
     ASSERT(differenceBetween(hotPathBegin, putResult) == patchOffsetGetByIdPutResult);
+
+    END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
 }
 
 void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
@@ -416,13 +427,18 @@ void JIT::compileGetByIdSlowCase(int dst, int base, Identifier* ident, Vector<Sl
     linkSlowCaseIfNotJSCell(iter, base);
     linkSlowCase(iter);
 
-    Label coldPathBegin(this);
+    BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
 
+#ifndef NDEBUG
+    Label coldPathBegin(this);
+#endif
     JITStubCall stubCall(this, isMethodCheck ? cti_op_get_by_id_method_check : cti_op_get_by_id);
     stubCall.addArgument(regT1, regT0);
     stubCall.addArgument(ImmPtr(ident));
     Call call = stubCall.call(dst);
 
+    END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
+
     ASSERT(differenceBetween(coldPathBegin, call) == patchOffsetGetByIdSlowCaseCall);
 
     // Track the location of the call; this will be used to recover patch information.
@@ -443,6 +459,8 @@ void JIT::emit_op_put_by_id(Instruction* currentInstruction)
 
     emitJumpSlowCaseIfNotJSCell(base, regT1);
 
+    BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
+
     Label hotPathBegin(this);
     m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
     m_propertyAccessInstructionIndex++;
@@ -460,6 +478,9 @@ void JIT::emit_op_put_by_id(Instruction* currentInstruction)
 
     DataLabel32 displacementLabel1 = storePtrWithAddressOffsetPatch(regT2, Address(regT0, patchGetByIdDefaultOffset)); // payload
     DataLabel32 displacementLabel2 = storePtrWithAddressOffsetPatch(regT3, Address(regT0, patchGetByIdDefaultOffset)); // tag
+
+    END_UNINTERRUPTED_SEQUENCE(sequencePutById);
+
     ASSERT(differenceBetween(hotPathBegin, displacementLabel1) == patchOffsetPutByIdPropertyMapOffset1);
     ASSERT(differenceBetween(hotPathBegin, displacementLabel2) == patchOffsetPutByIdPropertyMapOffset2);
 }
@@ -521,22 +542,26 @@ void JIT::compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID res
     load32(Address(temp, offset + 4), resultTag);
 }
 
+void JIT::testPrototype(Structure* structure, JumpList& failureCases)
+{
+    if (structure->m_prototype.isNull())
+        return;
+
+    failureCases.append(branchPtr(NotEqual, AbsoluteAddress(&asCell(structure->m_prototype)->m_structure), ImmPtr(asCell(structure->m_prototype)->m_structure)));
+}
+
 void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress)
 {
     // It is assumed that regT0 contains the basePayload and regT1 contains the baseTag.  The value can be found on the stack.
 
     JumpList failureCases;
     failureCases.append(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
-
-    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-    failureCases.append(branchPtr(NotEqual, regT2, ImmPtr(oldStructure)));
+    failureCases.append(branchPtr(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(oldStructure)));
+    testPrototype(oldStructure, failureCases);
 
     // Verify that nothing in the prototype chain has a setter for this property. 
-    for (RefPtr<Structure>* it = chain->head(); *it; ++it) {
-        loadPtr(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype)), regT2);
-        loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-        failureCases.append(branchPtr(NotEqual, regT2, ImmPtr(it->get())));
-    }
+    for (RefPtr<Structure>* it = chain->head(); *it; ++it)
+        testPrototype(it->get(), failureCases);
 
     // Reallocate property storage if needed.
     Call callTarget;
@@ -705,7 +730,7 @@ void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* str
 
     // Check the prototype object's Structure had not changed.
     Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     move(ImmPtr(prototypeStructure), regT3);
     Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
 #else
@@ -785,7 +810,7 @@ void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, Polymorphi
 
     // Check the prototype object's Structure had not changed.
     Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     move(ImmPtr(prototypeStructure), regT3);
     Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
 #else
@@ -838,7 +863,7 @@ void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, Polymorphi
 
         // Check the prototype object's Structure had not changed.
         Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         move(ImmPtr(currStructure), regT3);
         bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
 #else
@@ -893,7 +918,7 @@ void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* str
 
         // Check the prototype object's Structure had not changed.
         Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         move(ImmPtr(currStructure), regT3);
         bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
 #else
@@ -930,6 +955,69 @@ void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* str
 
 #endif // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
 
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID structure, RegisterID offset)
+{
+    ASSERT(sizeof(((Structure*)0)->m_propertyStorageCapacity) == sizeof(int32_t));
+    ASSERT(sizeof(JSObject::inlineStorageCapacity) == sizeof(int32_t));
+    ASSERT(sizeof(JSValue) == 8);
+
+    Jump notUsingInlineStorage = branch32(NotEqual, Address(structure, OBJECT_OFFSETOF(Structure, m_propertyStorageCapacity)), Imm32(JSObject::inlineStorageCapacity));
+    loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
+    loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
+    Jump finishedLoad = jump();
+    notUsingInlineStorage.link(this);
+    loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
+    loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
+    loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
+    finishedLoad.link(this);
+}
+
+void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
+{
+    unsigned dst = currentInstruction[1].u.operand;
+    unsigned base = currentInstruction[2].u.operand;
+    unsigned property = currentInstruction[3].u.operand;
+    unsigned expected = currentInstruction[4].u.operand;
+    unsigned iter = currentInstruction[5].u.operand;
+    unsigned i = currentInstruction[6].u.operand;
+
+    emitLoad2(property, regT1, regT0, base, regT3, regT2);
+    emitJumpSlowCaseIfNotJSCell(property, regT1);
+    addSlowCase(branchPtr(NotEqual, regT0, payloadFor(expected)));
+    // Property registers are now available as the property is known
+    emitJumpSlowCaseIfNotJSCell(base, regT3);
+    emitLoadPayload(iter, regT1);
+    
+    // Test base's structure
+    loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
+    addSlowCase(branchPtr(NotEqual, regT0, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
+    load32(addressFor(i), regT3);
+    sub32(Imm32(1), regT3);
+    addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
+    compileGetDirectOffset(regT2, regT1, regT0, regT0, regT3);    
+
+    emitStore(dst, regT1, regT0);
+    map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_pname), dst, regT1, regT0);
+}
+
+void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    unsigned dst = currentInstruction[1].u.operand;
+    unsigned base = currentInstruction[2].u.operand;
+    unsigned property = currentInstruction[3].u.operand;
+    
+    linkSlowCaseIfNotJSCell(iter, property);
+    linkSlowCase(iter);
+    linkSlowCaseIfNotJSCell(iter, base);
+    linkSlowCase(iter);
+    linkSlowCase(iter);
+    
+    JITStubCall stubCall(this, cti_op_get_by_val);
+    stubCall.addArgument(base);
+    stubCall.addArgument(property);
+    stubCall.call(dst);
+}
+
 #else // USE(JSVALUE32_64)
 
 void JIT::emit_op_get_by_val(Instruction* currentInstruction)
@@ -963,6 +1051,62 @@ void JIT::emit_op_get_by_val(Instruction* currentInstruction)
     emitPutVirtualRegister(dst);
 }
 
+void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID structure, RegisterID offset, RegisterID scratch)
+{
+    ASSERT(sizeof(((Structure*)0)->m_propertyStorageCapacity) == sizeof(int32_t));
+    ASSERT(sizeof(JSObject::inlineStorageCapacity) == sizeof(int32_t));
+
+    Jump notUsingInlineStorage = branch32(NotEqual, Address(structure, OBJECT_OFFSETOF(Structure, m_propertyStorageCapacity)), Imm32(JSObject::inlineStorageCapacity));
+    loadPtr(BaseIndex(base, offset, ScalePtr, OBJECT_OFFSETOF(JSObject, m_inlineStorage)), result);
+    Jump finishedLoad = jump();
+    notUsingInlineStorage.link(this);
+    loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), scratch);
+    loadPtr(BaseIndex(scratch, offset, ScalePtr, 0), result);
+    finishedLoad.link(this);
+}
+
+void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
+{
+    unsigned dst = currentInstruction[1].u.operand;
+    unsigned base = currentInstruction[2].u.operand;
+    unsigned property = currentInstruction[3].u.operand;
+    unsigned expected = currentInstruction[4].u.operand;
+    unsigned iter = currentInstruction[5].u.operand;
+    unsigned i = currentInstruction[6].u.operand;
+
+    emitGetVirtualRegister(property, regT0);
+    addSlowCase(branchPtr(NotEqual, regT0, addressFor(expected)));
+    emitGetVirtualRegisters(base, regT0, iter, regT1);
+    emitJumpSlowCaseIfNotJSCell(regT0, base);
+
+    // Test base's structure
+    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+    addSlowCase(branchPtr(NotEqual, regT2, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
+    load32(addressFor(i), regT3);
+    sub32(Imm32(1), regT3);
+    addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
+    compileGetDirectOffset(regT0, regT0, regT2, regT3, regT1);
+
+    emitPutVirtualRegister(dst, regT0);
+}
+
+void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    unsigned dst = currentInstruction[1].u.operand;
+    unsigned base = currentInstruction[2].u.operand;
+    unsigned property = currentInstruction[3].u.operand;
+
+    linkSlowCase(iter);
+    linkSlowCaseIfNotJSCell(iter, base);
+    linkSlowCase(iter);
+    linkSlowCase(iter);
+
+    JITStubCall stubCall(this, cti_op_get_by_val);
+    stubCall.addArgument(base, regT2);
+    stubCall.addArgument(property, regT2);
+    stubCall.call(dst);
+}
+
 void JIT::emit_op_put_by_val(Instruction* currentInstruction)
 {
     unsigned base = currentInstruction[1].u.operand;
@@ -1128,9 +1272,9 @@ void JIT::emit_op_method_check(Instruction* currentInstruction)
 
     Jump match = jump();
 
-    ASSERT(differenceBetween(info.structureToCompare, protoObj) == patchOffsetMethodCheckProtoObj);
-    ASSERT(differenceBetween(info.structureToCompare, protoStructureToCompare) == patchOffsetMethodCheckProtoStruct);
-    ASSERT(differenceBetween(info.structureToCompare, putFunction) == patchOffsetMethodCheckPutFunction);
+    ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, protoObj), patchOffsetMethodCheckProtoObj);
+    ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, protoStructureToCompare), patchOffsetMethodCheckProtoStruct);
+    ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, putFunction), patchOffsetMethodCheckPutFunction);
 
     // Link the failure cases here.
     notCell.link(this);
@@ -1197,22 +1341,22 @@ void JIT::compileGetByIdHotPath(int, int baseVReg, Identifier*, unsigned propert
     DataLabelPtr structureToCompare;
     Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
     addSlowCase(structureCheck);
-    ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetGetByIdStructure);
-    ASSERT(differenceBetween(hotPathBegin, structureCheck) == patchOffsetGetByIdBranchToSlowCase);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetGetByIdStructure);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureCheck), patchOffsetGetByIdBranchToSlowCase)
 
     Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
     Label externalLoadComplete(this);
-    ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetGetByIdExternalLoad);
-    ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthGetByIdExternalLoad);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, externalLoad), patchOffsetGetByIdExternalLoad);
+    ASSERT_JIT_OFFSET(differenceBetween(externalLoad, externalLoadComplete), patchLengthGetByIdExternalLoad);
 
     DataLabel32 displacementLabel = loadPtrWithAddressOffsetPatch(Address(regT0, patchGetByIdDefaultOffset), regT0);
-    ASSERT(differenceBetween(hotPathBegin, displacementLabel) == patchOffsetGetByIdPropertyMapOffset);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, displacementLabel), patchOffsetGetByIdPropertyMapOffset);
 
     Label putResult(this);
 
     END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
 
-    ASSERT(differenceBetween(hotPathBegin, putResult) == patchOffsetGetByIdPutResult);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, putResult), patchOffsetGetByIdPutResult);
 }
 
 void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
@@ -1247,7 +1391,7 @@ void JIT::compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident
 
     END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
 
-    ASSERT(differenceBetween(coldPathBegin, call) == patchOffsetGetByIdSlowCaseCall);
+    ASSERT_JIT_OFFSET(differenceBetween(coldPathBegin, call), patchOffsetGetByIdSlowCaseCall);
 
     // Track the location of the call; this will be used to recover patch information.
     m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
@@ -1278,19 +1422,19 @@ void JIT::emit_op_put_by_id(Instruction* currentInstruction)
     // It is important that the following instruction plants a 32bit immediate, in order that it can be patched over.
     DataLabelPtr structureToCompare;
     addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
-    ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetPutByIdStructure);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetPutByIdStructure);
 
     // Plant a load from a bogus ofset in the object's property map; we will patch this later, if it is to be used.
     Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
     Label externalLoadComplete(this);
-    ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetPutByIdExternalLoad);
-    ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthPutByIdExternalLoad);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, externalLoad), patchOffsetPutByIdExternalLoad);
+    ASSERT_JIT_OFFSET(differenceBetween(externalLoad, externalLoadComplete), patchLengthPutByIdExternalLoad);
 
     DataLabel32 displacementLabel = storePtrWithAddressOffsetPatch(regT1, Address(regT0, patchGetByIdDefaultOffset));
 
     END_UNINTERRUPTED_SEQUENCE(sequencePutById);
 
-    ASSERT(differenceBetween(hotPathBegin, displacementLabel) == patchOffsetPutByIdPropertyMapOffset);
+    ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, displacementLabel), patchOffsetPutByIdPropertyMapOffset);
 }
 
 void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
@@ -1347,35 +1491,27 @@ void JIT::compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID res
     } 
 }
 
+void JIT::testPrototype(Structure* structure, JumpList& failureCases)
+{
+    if (structure->m_prototype.isNull())
+        return;
+
+    move(ImmPtr(&asCell(structure->m_prototype)->m_structure), regT2);
+    move(ImmPtr(asCell(structure->m_prototype)->m_structure), regT3);
+    failureCases.append(branchPtr(NotEqual, Address(regT2), regT3));
+}
+
 void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress)
 {
     JumpList failureCases;
     // Check eax is an object of the right Structure.
     failureCases.append(emitJumpIfNotJSCell(regT0));
     failureCases.append(branchPtr(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(oldStructure)));
-    JumpList successCases;
-
-    // ecx = baseObject
-    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-    // proto(ecx) = baseObject->structure()->prototype()
-    failureCases.append(branch32(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo) + OBJECT_OFFSETOF(TypeInfo, m_type)), Imm32(ObjectType)));
+    testPrototype(oldStructure, failureCases);
 
-    loadPtr(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype)), regT2);
-    
     // ecx = baseObject->m_structure
-    for (RefPtr<Structure>* it = chain->head(); *it; ++it) {
-        // null check the prototype
-        successCases.append(branchPtr(Equal, regT2, ImmPtr(JSValue::encode(jsNull()))));
-
-        // Check the structure id
-        failureCases.append(branchPtr(NotEqual, Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(it->get())));
-        
-        loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
-        failureCases.append(branch32(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo) + OBJECT_OFFSETOF(TypeInfo, m_type)), Imm32(ObjectType)));
-        loadPtr(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype)), regT2);
-    }
-
-    successCases.link(this);
+    for (RefPtr<Structure>* it = chain->head(); *it; ++it)
+        testPrototype(it->get(), failureCases);
 
     Call callTarget;
 
@@ -1540,7 +1676,7 @@ void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* str
 
     // Check the prototype object's Structure had not changed.
     Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     move(ImmPtr(prototypeStructure), regT3);
     Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
 #else
@@ -1615,7 +1751,7 @@ void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, Polymorphi
 
     // Check the prototype object's Structure had not changed.
     Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     move(ImmPtr(prototypeStructure), regT3);
     Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
 #else
@@ -1668,7 +1804,7 @@ void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, Polymorphi
 
         // Check the prototype object's Structure had not changed.
         Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         move(ImmPtr(currStructure), regT3);
         bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
 #else
@@ -1721,7 +1857,7 @@ void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* str
 
         // Check the prototype object's Structure had not changed.
         Structure** prototypeStructureAddress = &(protoObject->m_structure);
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         move(ImmPtr(currStructure), regT3);
         bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
 #else
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubCall.h b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubCall.h
index cb5354b..cfbd7dc 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubCall.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubCall.h
@@ -26,7 +26,7 @@
 #ifndef JITStubCall_h
 #define JITStubCall_h
 
-#include <wtf/Platform.h>
+#include "MacroAssemblerCodeRef.h"
 
 #if ENABLE(JIT)
 
@@ -36,58 +36,58 @@ namespace JSC {
     public:
         JITStubCall(JIT* jit, JSObject* (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
             : m_jit(jit)
-            , m_stub(reinterpret_cast<void*>(stub))
+            , m_stub(stub)
             , m_returnType(Cell)
-            , m_stackIndex(stackIndexStart)
+            , m_stackIndex(JITSTACKFRAME_ARGS_INDEX)
         {
         }
 
         JITStubCall(JIT* jit, JSPropertyNameIterator* (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
             : m_jit(jit)
-            , m_stub(reinterpret_cast<void*>(stub))
+            , m_stub(stub)
             , m_returnType(Cell)
-            , m_stackIndex(stackIndexStart)
+            , m_stackIndex(JITSTACKFRAME_ARGS_INDEX)
         {
         }
 
         JITStubCall(JIT* jit, void* (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
             : m_jit(jit)
-            , m_stub(reinterpret_cast<void*>(stub))
+            , m_stub(stub)
             , m_returnType(VoidPtr)
-            , m_stackIndex(stackIndexStart)
+            , m_stackIndex(JITSTACKFRAME_ARGS_INDEX)
         {
         }
 
         JITStubCall(JIT* jit, int (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
             : m_jit(jit)
-            , m_stub(reinterpret_cast<void*>(stub))
+            , m_stub(stub)
             , m_returnType(Int)
-            , m_stackIndex(stackIndexStart)
+            , m_stackIndex(JITSTACKFRAME_ARGS_INDEX)
         {
         }
 
         JITStubCall(JIT* jit, bool (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
             : m_jit(jit)
-            , m_stub(reinterpret_cast<void*>(stub))
+            , m_stub(stub)
             , m_returnType(Int)
-            , m_stackIndex(stackIndexStart)
+            , m_stackIndex(JITSTACKFRAME_ARGS_INDEX)
         {
         }
 
         JITStubCall(JIT* jit, void (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
             : m_jit(jit)
-            , m_stub(reinterpret_cast<void*>(stub))
+            , m_stub(stub)
             , m_returnType(Void)
-            , m_stackIndex(stackIndexStart)
+            , m_stackIndex(JITSTACKFRAME_ARGS_INDEX)
         {
         }
 
 #if USE(JSVALUE32_64)
         JITStubCall(JIT* jit, EncodedJSValue (JIT_STUB *stub)(STUB_ARGS_DECLARATION))
             : m_jit(jit)
-            , m_stub(reinterpret_cast<void*>(stub))
+            , m_stub(stub)
             , m_returnType(Value)
-            , m_stackIndex(stackIndexStart)
+            , m_stackIndex(JITSTACKFRAME_ARGS_INDEX)
         {
         }
 #endif
@@ -145,7 +145,7 @@ namespace JSC {
 
         void getArgument(size_t argumentNumber, JIT::RegisterID tag, JIT::RegisterID payload)
         {
-            size_t stackIndex = stackIndexStart + (argumentNumber * stackIndexStep);
+            size_t stackIndex = JITSTACKFRAME_ARGS_INDEX + (argumentNumber * stackIndexStep);
             m_jit->peek(payload, stackIndex);
             m_jit->peek(tag, stackIndex + 1);
         }
@@ -171,7 +171,7 @@ namespace JSC {
 
             m_jit->restoreArgumentReference();
             JIT::Call call = m_jit->call();
-            m_jit->m_calls.append(CallRecord(call, m_jit->m_bytecodeIndex, m_stub));
+            m_jit->m_calls.append(CallRecord(call, m_jit->m_bytecodeIndex, m_stub.value()));
 
 #if ENABLE(OPCODE_SAMPLING)
             if (m_jit->m_bytecodeIndex != (unsigned)-1)
@@ -222,10 +222,9 @@ namespace JSC {
 
     private:
         static const size_t stackIndexStep = sizeof(EncodedJSValue) == 2 * sizeof(void*) ? 2 : 1;
-        static const size_t stackIndexStart = 1; // Index 0 is reserved for restoreArgumentReference().
 
         JIT* m_jit;
-        void* m_stub;
+        FunctionPtr m_stub;
         enum { Void, VoidPtr, Int, Value, Cell } m_returnType;
         size_t m_stackIndex;
     };
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp
index b098728..91b9401 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp
@@ -56,6 +56,7 @@
 #include "RegExpPrototype.h"
 #include "Register.h"
 #include "SamplingTool.h"
+#include <wtf/StdLibExtras.h>
 #include <stdarg.h>
 #include <stdio.h>
 
@@ -67,25 +68,37 @@ using namespace std;
 
 namespace JSC {
 
-#if PLATFORM(DARWIN) || PLATFORM(WIN_OS)
+#if OS(DARWIN) || OS(WINDOWS)
 #define SYMBOL_STRING(name) "_" #name
 #else
 #define SYMBOL_STRING(name) #name
 #endif
 
-#if PLATFORM(IPHONE)
+#if OS(IPHONE_OS)
 #define THUMB_FUNC_PARAM(name) SYMBOL_STRING(name)
 #else
 #define THUMB_FUNC_PARAM(name)
 #endif
 
-#if PLATFORM(DARWIN)
+#if OS(LINUX) && CPU(X86_64)
+#define SYMBOL_STRING_RELOCATION(name) #name "@plt"
+#else
+#define SYMBOL_STRING_RELOCATION(name) SYMBOL_STRING(name)
+#endif
+
+#if OS(DARWIN)
     // Mach-O platform
 #define HIDE_SYMBOL(name) ".private_extern _" #name
-#elif PLATFORM(AIX)
+#elif OS(AIX)
     // IBM's own file format
 #define HIDE_SYMBOL(name) ".lglobl " #name
-#elif PLATFORM(LINUX) || PLATFORM(FREEBSD) || PLATFORM(OPENBSD) || PLATFORM(SOLARIS) || (PLATFORM(HPUX) && PLATFORM(IA64)) || PLATFORM(SYMBIAN) || PLATFORM(NETBSD)
+#elif   OS(LINUX)               \
+     || OS(FREEBSD)             \
+     || OS(OPENBSD)             \
+     || OS(SOLARIS)             \
+     || (OS(HPUX) && CPU(IA64)) \
+     || OS(SYMBIAN)             \
+     || OS(NETBSD)
     // ELF platform
 #define HIDE_SYMBOL(name) ".hidden " #name
 #else
@@ -94,7 +107,7 @@ namespace JSC {
 
 #if USE(JSVALUE32_64)
 
-#if COMPILER(GCC) && PLATFORM(X86)
+#if COMPILER(GCC) && CPU(X86)
 
 // These ASSERTs remind you that, if you change the layout of JITStackFrame, you
 // need to change the assembly trampolines below to match.
@@ -104,6 +117,7 @@ COMPILE_ASSERT(offsetof(struct JITStackFrame, callFrame) == 0x58, JITStackFrame_
 COMPILE_ASSERT(offsetof(struct JITStackFrame, code) == 0x50, JITStackFrame_code_offset_matches_ctiTrampoline);
 
 asm volatile (
+".text\n"
 ".globl " SYMBOL_STRING(ctiTrampoline) "\n"
 HIDE_SYMBOL(ctiTrampoline) "\n"
 SYMBOL_STRING(ctiTrampoline) ":" "\n"
@@ -131,7 +145,7 @@ SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
 #if !USE(JIT_STUB_ARGUMENT_VA_LIST)
     "movl %esp, %ecx" "\n"
 #endif
-    "call " SYMBOL_STRING(cti_vm_throw) "\n"
+    "call " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
     "addl $0x3c, %esp" "\n"
     "popl %ebx" "\n"
     "popl %edi" "\n"
@@ -152,7 +166,7 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "ret" "\n"
 );
     
-#elif COMPILER(GCC) && PLATFORM(X86_64)
+#elif COMPILER(GCC) && CPU(X86_64)
 
 #if USE(JIT_STUB_ARGUMENT_VA_LIST)
 #error "JIT_STUB_ARGUMENT_VA_LIST not supported on x86-64."
@@ -197,7 +211,7 @@ asm volatile (
 HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
 SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
     "movq %rsp, %rdi" "\n"
-    "call " SYMBOL_STRING(cti_vm_throw) "\n"
+    "call " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
     "addq $0x48, %rsp" "\n"
     "popq %rbx" "\n"
     "popq %r15" "\n"
@@ -222,7 +236,7 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "ret" "\n"
 );
 
-#elif COMPILER(GCC) && PLATFORM(ARM_THUMB2)
+#elif COMPILER(GCC) && CPU(ARM_THUMB2)
 
 #if USE(JIT_STUB_ARGUMENT_VA_LIST)
 #error "JIT_STUB_ARGUMENT_VA_LIST not supported on ARMv7."
@@ -232,9 +246,9 @@ asm volatile (
 ".text" "\n"
 ".align 2" "\n"
 ".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
 ".thumb" "\n"
 ".thumb_func " THUMB_FUNC_PARAM(ctiTrampoline) "\n"
-HIDE_SYMBOL(ctiTrampoline) "\n"
 SYMBOL_STRING(ctiTrampoline) ":" "\n"
     "sub sp, sp, #0x3c" "\n"
     "str lr, [sp, #0x20]" "\n"
@@ -259,12 +273,12 @@ asm volatile (
 ".text" "\n"
 ".align 2" "\n"
 ".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
 ".thumb" "\n"
 ".thumb_func " THUMB_FUNC_PARAM(ctiVMThrowTrampoline) "\n"
-HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
 SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
     "cpy r0, sp" "\n"
-    "bl " SYMBOL_STRING(cti_vm_throw) "\n"
+    "bl " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
     "ldr r6, [sp, #0x2c]" "\n"
     "ldr r5, [sp, #0x28]" "\n"
     "ldr r4, [sp, #0x24]" "\n"
@@ -277,9 +291,9 @@ asm volatile (
 ".text" "\n"
 ".align 2" "\n"
 ".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
 ".thumb" "\n"
 ".thumb_func " THUMB_FUNC_PARAM(ctiOpThrowNotCaught) "\n"
-HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
 SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "ldr r6, [sp, #0x2c]" "\n"
     "ldr r5, [sp, #0x28]" "\n"
@@ -289,7 +303,44 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "bx lr" "\n"
 );
 
-#elif COMPILER(MSVC)
+#elif COMPILER(GCC) && CPU(ARM_TRADITIONAL)
+
+asm volatile (
+".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
+SYMBOL_STRING(ctiTrampoline) ":" "\n"
+    "stmdb sp!, {r1-r3}" "\n"
+    "stmdb sp!, {r4-r8, lr}" "\n"
+    "sub sp, sp, #68" "\n"
+    "mov r4, r2" "\n"
+    "mov r5, #512" "\n"
+    // r0 contains the code
+    "mov lr, pc" "\n"
+    "mov pc, r0" "\n"
+    "add sp, sp, #68" "\n"
+    "ldmia sp!, {r4-r8, lr}" "\n"
+    "add sp, sp, #12" "\n"
+    "mov pc, lr" "\n"
+);
+
+asm volatile (
+".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
+SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
+    "mov r0, sp" "\n"
+    "bl " SYMBOL_STRING(cti_vm_throw) "\n"
+
+// Both has the same return sequence
+".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
+SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
+    "add sp, sp, #68" "\n"
+    "ldmia sp!, {r4-r8, lr}" "\n"
+    "add sp, sp, #12" "\n"
+    "mov pc, lr" "\n"
+);
+
+#elif COMPILER(MSVC) && CPU(X86)
 
 #if USE(JIT_STUB_ARGUMENT_VA_LIST)
 #error "JIT_STUB_ARGUMENT_VA_LIST configuration not supported on MSVC."
@@ -353,11 +404,13 @@ extern "C" {
     }
 }
 
-#endif // COMPILER(GCC) && PLATFORM(X86)
+#else
+    #error "JIT not supported on this platform."
+#endif
 
 #else // USE(JSVALUE32_64)
 
-#if COMPILER(GCC) && PLATFORM(X86)
+#if COMPILER(GCC) && CPU(X86)
 
 // These ASSERTs remind you that, if you change the layout of JITStackFrame, you
 // need to change the assembly trampolines below to match.
@@ -366,6 +419,7 @@ COMPILE_ASSERT(offsetof(struct JITStackFrame, code) == 0x30, JITStackFrame_code_
 COMPILE_ASSERT(offsetof(struct JITStackFrame, savedEBX) == 0x1c, JITStackFrame_stub_argument_space_matches_ctiTrampoline);
 
 asm volatile (
+".text\n"
 ".globl " SYMBOL_STRING(ctiTrampoline) "\n"
 HIDE_SYMBOL(ctiTrampoline) "\n"
 SYMBOL_STRING(ctiTrampoline) ":" "\n"
@@ -393,7 +447,7 @@ SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
 #if !USE(JIT_STUB_ARGUMENT_VA_LIST)
     "movl %esp, %ecx" "\n"
 #endif
-    "call " SYMBOL_STRING(cti_vm_throw) "\n"
+    "call " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
     "addl $0x1c, %esp" "\n"
     "popl %ebx" "\n"
     "popl %edi" "\n"
@@ -414,7 +468,7 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "ret" "\n"
 );
     
-#elif COMPILER(GCC) && PLATFORM(X86_64)
+#elif COMPILER(GCC) && CPU(X86_64)
 
 #if USE(JIT_STUB_ARGUMENT_VA_LIST)
 #error "JIT_STUB_ARGUMENT_VA_LIST not supported on x86-64."
@@ -427,6 +481,7 @@ COMPILE_ASSERT(offsetof(struct JITStackFrame, code) == 0x48, JITStackFrame_code_
 COMPILE_ASSERT(offsetof(struct JITStackFrame, savedRBX) == 0x78, JITStackFrame_stub_argument_space_matches_ctiTrampoline);
 
 asm volatile (
+".text\n"
 ".globl " SYMBOL_STRING(ctiTrampoline) "\n"
 HIDE_SYMBOL(ctiTrampoline) "\n"
 SYMBOL_STRING(ctiTrampoline) ":" "\n"
@@ -465,7 +520,7 @@ asm volatile (
 HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
 SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
     "movq %rsp, %rdi" "\n"
-    "call " SYMBOL_STRING(cti_vm_throw) "\n"
+    "call " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
     "addq $0x78, %rsp" "\n"
     "popq %rbx" "\n"
     "popq %r15" "\n"
@@ -490,7 +545,7 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "ret" "\n"
 );
 
-#elif COMPILER(GCC) && PLATFORM(ARM_THUMB2)
+#elif COMPILER(GCC) && CPU(ARM_THUMB2)
 
 #if USE(JIT_STUB_ARGUMENT_VA_LIST)
 #error "JIT_STUB_ARGUMENT_VA_LIST not supported on ARMv7."
@@ -532,7 +587,7 @@ HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
 ".thumb_func " THUMB_FUNC_PARAM(ctiVMThrowTrampoline) "\n"
 SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
     "cpy r0, sp" "\n"
-    "bl " SYMBOL_STRING(cti_vm_throw) "\n"
+    "bl " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
     "ldr r6, [sp, #0x2c]" "\n"
     "ldr r5, [sp, #0x28]" "\n"
     "ldr r4, [sp, #0x24]" "\n"
@@ -557,30 +612,24 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "bx lr" "\n"
 );
 
-#elif COMPILER(GCC) && PLATFORM(ARM_TRADITIONAL)
+#elif COMPILER(GCC) && CPU(ARM_TRADITIONAL)
 
 asm volatile (
+".text\n"
 ".globl " SYMBOL_STRING(ctiTrampoline) "\n"
 HIDE_SYMBOL(ctiTrampoline) "\n"
 SYMBOL_STRING(ctiTrampoline) ":" "\n"
     "stmdb sp!, {r1-r3}" "\n"
     "stmdb sp!, {r4-r8, lr}" "\n"
-    "mov r6, pc" "\n"
-    "add r6, r6, #40" "\n"
-    "sub sp, sp, #32" "\n"
-    "ldr r4, [sp, #60]" "\n"
+    "sub sp, sp, #36" "\n"
+    "mov r4, r2" "\n"
     "mov r5, #512" "\n"
-    // r0 contains the code
-    "add r8, pc, #4" "\n"
-    "str r8, [sp, #-4]!" "\n"
+    "mov lr, pc" "\n"
     "mov pc, r0" "\n"
-    "add sp, sp, #32" "\n"
+    "add sp, sp, #36" "\n"
     "ldmia sp!, {r4-r8, lr}" "\n"
     "add sp, sp, #12" "\n"
     "mov pc, lr" "\n"
-
-    // the return instruction
-    "ldr pc, [sp], #4" "\n"
 );
 
 asm volatile (
@@ -588,22 +637,58 @@ asm volatile (
 HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
 SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
     "mov r0, sp" "\n"
-    "mov lr, r6" "\n"
-    "add r8, pc, #4" "\n"
-    "str r8, [sp, #-4]!" "\n"
-    "b " SYMBOL_STRING(cti_vm_throw) "\n"
+    "bl " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
 
 // Both has the same return sequence
 ".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
 HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
 SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
-    "add sp, sp, #32" "\n"
+    "add sp, sp, #36" "\n"
     "ldmia sp!, {r4-r8, lr}" "\n"
     "add sp, sp, #12" "\n"
     "mov pc, lr" "\n"
 );
 
-#elif COMPILER(MSVC)
+#elif COMPILER(RVCT) && CPU(ARM_TRADITIONAL)
+
+__asm EncodedJSValue ctiTrampoline(void*, RegisterFile*, CallFrame*, JSValue*, Profiler**, JSGlobalData*)
+{
+    ARM
+    stmdb sp!, {r1-r3}
+    stmdb sp!, {r4-r8, lr}
+    sub sp, sp, #36
+    mov r4, r2
+    mov r5, #512
+    mov lr, pc
+    bx r0
+    add sp, sp, #36
+    ldmia sp!, {r4-r8, lr}
+    add sp, sp, #12
+    bx lr
+}
+
+__asm void ctiVMThrowTrampoline()
+{
+    ARM
+    PRESERVE8
+    mov r0, sp
+    bl cti_vm_throw
+    add sp, sp, #36
+    ldmia sp!, {r4-r8, lr}
+    add sp, sp, #12
+    bx lr
+}
+
+__asm void ctiOpThrowNotCaught()
+{
+    ARM
+    add sp, sp, #36
+    ldmia sp!, {r4-r8, lr}
+    add sp, sp, #12
+    bx lr
+}
+
+#elif COMPILER(MSVC) && CPU(X86)
 
 #if USE(JIT_STUB_ARGUMENT_VA_LIST)
 #error "JIT_STUB_ARGUMENT_VA_LIST configuration not supported on MSVC."
@@ -666,7 +751,9 @@ extern "C" {
      }
 }
 
-#endif // COMPILER(GCC) && PLATFORM(X86)
+#else
+    #error "JIT not supported on this platform."
+#endif
 
 #endif // USE(JSVALUE32_64)
 
@@ -680,7 +767,7 @@ JITThunks::JITThunks(JSGlobalData* globalData)
 {
     JIT::compileCTIMachineTrampolines(globalData, &m_executablePool, &m_ctiStringLengthTrampoline, &m_ctiVirtualCallLink, &m_ctiVirtualCall, &m_ctiNativeCallThunk);
 
-#if PLATFORM(ARM_THUMB2)
+#if CPU(ARM_THUMB2)
     // Unfortunate the arm compiler does not like the use of offsetof on JITStackFrame (since it contains non POD types),
     // and the OBJECT_OFFSETOF macro does not appear constantish enough for it to be happy with its use in COMPILE_ASSERT
     // macros.
@@ -732,11 +819,15 @@ NEVER_INLINE void JITThunks::tryCachePutByID(CallFrame* callFrame, CodeBlock* co
 
     // Structure transition, cache transition info
     if (slot.type() == PutPropertySlot::NewProperty) {
-        StructureChain* prototypeChain = structure->prototypeChain(callFrame);
-        if (!prototypeChain->isCacheable() || structure->isDictionary()) {
+        if (structure->isDictionary()) {
             ctiPatchCallByReturnAddress(codeBlock, returnAddress, FunctionPtr(cti_op_put_by_id_generic));
             return;
         }
+
+        // put_by_id_transition checks the prototype chain for setters.
+        normalizePrototypeChain(callFrame, baseCell);
+
+        StructureChain* prototypeChain = structure->prototypeChain(callFrame);
         stubInfo->initPutByIdTransition(structure->previousID(), structure, prototypeChain);
         JIT::compilePutByIdTransition(callFrame->scopeChain()->globalData, codeBlock, stubInfo, structure->previousID(), structure, slot.cachedOffset(), prototypeChain, returnAddress);
         return;
@@ -796,35 +887,42 @@ NEVER_INLINE void JITThunks::tryCacheGetByID(CallFrame* callFrame, CodeBlock* co
         return;
     }
 
+    if (structure->isDictionary()) {
+        ctiPatchCallByReturnAddress(codeBlock, returnAddress, FunctionPtr(cti_op_get_by_id_generic));
+        return;
+    }
+
     if (slot.slotBase() == structure->prototypeForLookup(callFrame)) {
         ASSERT(slot.slotBase().isObject());
 
         JSObject* slotBaseObject = asObject(slot.slotBase());
-
+        size_t offset = slot.cachedOffset();
+        
         // Since we're accessing a prototype in a loop, it's a good bet that it
         // should not be treated as a dictionary.
-        if (slotBaseObject->structure()->isDictionary())
-            slotBaseObject->setStructure(Structure::fromDictionaryTransition(slotBaseObject->structure()));
+        if (slotBaseObject->structure()->isDictionary()) {
+            slotBaseObject->flattenDictionaryObject();
+            offset = slotBaseObject->structure()->get(propertyName);
+        }
         
         stubInfo->initGetByIdProto(structure, slotBaseObject->structure());
 
-        JIT::compileGetByIdProto(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, structure, slotBaseObject->structure(), slot.cachedOffset(), returnAddress);
+        ASSERT(!structure->isDictionary());
+        ASSERT(!slotBaseObject->structure()->isDictionary());
+        JIT::compileGetByIdProto(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, structure, slotBaseObject->structure(), offset, returnAddress);
         return;
     }
 
-    size_t count = countPrototypeChainEntriesAndCheckForProxies(callFrame, baseValue, slot);
+    size_t offset = slot.cachedOffset();
+    size_t count = normalizePrototypeChain(callFrame, baseValue, slot.slotBase(), propertyName, offset);
     if (!count) {
         stubInfo->accessType = access_get_by_id_generic;
         return;
     }
 
     StructureChain* prototypeChain = structure->prototypeChain(callFrame);
-    if (!prototypeChain->isCacheable()) {
-        ctiPatchCallByReturnAddress(codeBlock, returnAddress, FunctionPtr(cti_op_get_by_id_generic));
-        return;
-    }
     stubInfo->initGetByIdChain(structure, prototypeChain);
-    JIT::compileGetByIdChain(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, structure, prototypeChain, count, slot.cachedOffset(), returnAddress);
+    JIT::compileGetByIdChain(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, structure, prototypeChain, count, offset, returnAddress);
 }
 
 #endif // ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
@@ -920,7 +1018,7 @@ static NEVER_INLINE void throwStackOverflowError(CallFrame* callFrame, JSGlobalD
         } \
     } while (0)
 
-#if PLATFORM(ARM_THUMB2)
+#if CPU(ARM_THUMB2)
 
 #define DEFINE_STUB_FUNCTION(rtype, op) \
     extern "C" { \
@@ -941,6 +1039,57 @@ static NEVER_INLINE void throwStackOverflowError(CallFrame* callFrame, JSGlobalD
         ); \
     rtype JITStubThunked_##op(STUB_ARGS_DECLARATION) \
 
+#elif CPU(ARM_TRADITIONAL) && COMPILER(GCC)
+
+#if USE(JSVALUE32_64)
+#define THUNK_RETURN_ADDRESS_OFFSET 64
+#else
+#define THUNK_RETURN_ADDRESS_OFFSET 32
+#endif
+
+COMPILE_ASSERT(offsetof(struct JITStackFrame, thunkReturnAddress) == THUNK_RETURN_ADDRESS_OFFSET, JITStackFrame_thunkReturnAddress_offset_mismatch);
+
+#define DEFINE_STUB_FUNCTION(rtype, op) \
+    extern "C" { \
+        rtype JITStubThunked_##op(STUB_ARGS_DECLARATION); \
+    }; \
+    asm volatile ( \
+        ".globl " SYMBOL_STRING(cti_##op) "\n" \
+        HIDE_SYMBOL(cti_##op) "\n"             \
+        SYMBOL_STRING(cti_##op) ":" "\n" \
+        "str lr, [sp, #" STRINGIZE_VALUE_OF(THUNK_RETURN_ADDRESS_OFFSET) "]" "\n" \
+        "bl " SYMBOL_STRING(JITStubThunked_##op) "\n" \
+        "ldr lr, [sp, #" STRINGIZE_VALUE_OF(THUNK_RETURN_ADDRESS_OFFSET) "]" "\n" \
+        "mov pc, lr" "\n" \
+        ); \
+    rtype JITStubThunked_##op(STUB_ARGS_DECLARATION)
+
+#elif CPU(ARM_TRADITIONAL) && COMPILER(RVCT)
+
+#define DEFINE_STUB_FUNCTION(rtype, op) rtype JITStubThunked_##op(STUB_ARGS_DECLARATION)
+
+/* The following is a workaround for RVCT toolchain; precompiler macros are not expanded before the code is passed to the assembler */
+
+/* The following section is a template to generate code for GeneratedJITStubs_RVCT.h */
+/* The pattern "#xxx#" will be replaced with "xxx" */
+
+/*
+RVCT(extern "C" #rtype# JITStubThunked_#op#(STUB_ARGS_DECLARATION);)
+RVCT(__asm #rtype# cti_#op#(STUB_ARGS_DECLARATION))
+RVCT({)
+RVCT(    ARM)
+RVCT(    IMPORT JITStubThunked_#op#)
+RVCT(    str lr, [sp, #32])
+RVCT(    bl JITStubThunked_#op#)
+RVCT(    ldr lr, [sp, #32])
+RVCT(    bx lr)
+RVCT(})
+RVCT()
+*/
+
+/* Include the generated file */
+#include "GeneratedJITStubs_RVCT.h"
+
 #else
 #define DEFINE_STUB_FUNCTION(rtype, op) rtype JIT_STUB cti_##op(STUB_ARGS_DECLARATION)
 #endif
@@ -972,38 +1121,19 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_add)
 
     JSValue v1 = stackFrame.args[0].jsValue();
     JSValue v2 = stackFrame.args[1].jsValue();
-
-    double left;
-    double right = 0.0;
-
-    bool rightIsNumber = v2.getNumber(right);
-    if (rightIsNumber && v1.getNumber(left))
-        return JSValue::encode(jsNumber(stackFrame.globalData, left + right));
-    
     CallFrame* callFrame = stackFrame.callFrame;
 
-    bool leftIsString = v1.isString();
-    if (leftIsString && v2.isString()) {
-        RefPtr<UString::Rep> value = concatenate(asString(v1)->value().rep(), asString(v2)->value().rep());
-        if (UNLIKELY(!value)) {
-            throwOutOfMemoryError(callFrame);
-            VM_THROW_EXCEPTION();
-        }
-
-        return JSValue::encode(jsString(stackFrame.globalData, value.release()));
+    if (v1.isString()) {
+        JSValue result = v2.isString()
+            ? jsString(callFrame, asString(v1), asString(v2))
+            : jsString(callFrame, asString(v1), v2.toPrimitiveString(callFrame));
+        CHECK_FOR_EXCEPTION_AT_END();
+        return JSValue::encode(result);
     }
 
-    if (rightIsNumber & leftIsString) {
-        RefPtr<UString::Rep> value = v2.isInt32() ?
-            concatenate(asString(v1)->value().rep(), v2.asInt32()) :
-            concatenate(asString(v1)->value().rep(), right);
-
-        if (UNLIKELY(!value)) {
-            throwOutOfMemoryError(callFrame);
-            VM_THROW_EXCEPTION();
-        }
-        return JSValue::encode(jsString(stackFrame.globalData, value.release()));
-    }
+    double left = 0.0, right;
+    if (v1.getNumber(left) && v2.getNumber(right))
+        return JSValue::encode(jsNumber(stackFrame.globalData, left + right));
 
     // All other cases are pretty uncommon
     JSValue result = jsAddSlowCase(callFrame, v1, v2);
@@ -1053,19 +1183,6 @@ DEFINE_STUB_FUNCTION(void, register_file_check)
     throwStackOverflowError(oldCallFrame, stackFrame.globalData, ReturnAddressPtr(oldCallFrame->returnPC()), STUB_RETURN_ADDRESS);
 }
 
-DEFINE_STUB_FUNCTION(int, op_loop_if_less)
-{
-    STUB_INIT_STACK_FRAME(stackFrame);
-
-    JSValue src1 = stackFrame.args[0].jsValue();
-    JSValue src2 = stackFrame.args[1].jsValue();
-    CallFrame* callFrame = stackFrame.callFrame;
-
-    bool result = jsLess(callFrame, src1, src2);
-    CHECK_FOR_EXCEPTION_AT_END();
-    return result;
-}
-
 DEFINE_STUB_FUNCTION(int, op_loop_if_lesseq)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
@@ -1204,7 +1321,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_get_by_id_method_check)
         // Since we're accessing a prototype in a loop, it's a good bet that it
         // should not be treated as a dictionary.
         if (slotBaseObject->structure()->isDictionary())
-            slotBaseObject->setStructure(Structure::fromDictionaryTransition(slotBaseObject->structure()));
+            slotBaseObject->flattenDictionaryObject();
 
         // The result fetched should always be the callee!
         ASSERT(result == JSValue(callee));
@@ -1222,7 +1339,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_get_by_id_method_check)
         // for now.  For now it performs a check on a special object on the global object only used for this
         // purpose.  The object is in no way exposed, and as such the check will always pass.
         if (slot.slotBase() == baseValue) {
-            JIT::patchMethodCallProto(codeBlock, methodCallLinkInfo, callee, structure, callFrame->scopeChain()->globalObject()->methodCallDummy(), STUB_RETURN_ADDRESS);
+            JIT::patchMethodCallProto(codeBlock, methodCallLinkInfo, callee, structure, callFrame->scopeChain()->globalObject->methodCallDummy(), STUB_RETURN_ADDRESS);
             return JSValue::encode(result);
         }
     }
@@ -1332,14 +1449,15 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_get_by_id_proto_list)
     STUB_INIT_STACK_FRAME(stackFrame);
 
     CallFrame* callFrame = stackFrame.callFrame;
+    const Identifier& propertyName = stackFrame.args[1].identifier();
 
     JSValue baseValue = stackFrame.args[0].jsValue();
     PropertySlot slot(baseValue);
-    JSValue result = baseValue.get(callFrame, stackFrame.args[1].identifier(), slot);
+    JSValue result = baseValue.get(callFrame, propertyName, slot);
 
     CHECK_FOR_EXCEPTION();
 
-    if (!baseValue.isCell() || !slot.isCacheable() || asCell(baseValue)->structure()->isUncacheableDictionary()) {
+    if (!baseValue.isCell() || !slot.isCacheable() || asCell(baseValue)->structure()->isDictionary()) {
         ctiPatchCallByReturnAddress(callFrame->codeBlock(), STUB_RETURN_ADDRESS, FunctionPtr(cti_op_get_by_id_proto_fail));
         return JSValue::encode(result);
     }
@@ -1350,32 +1468,34 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_get_by_id_proto_list)
 
     ASSERT(slot.slotBase().isObject());
     JSObject* slotBaseObject = asObject(slot.slotBase());
+    
+    size_t offset = slot.cachedOffset();
 
     if (slot.slotBase() == baseValue)
         ctiPatchCallByReturnAddress(codeBlock, STUB_RETURN_ADDRESS, FunctionPtr(cti_op_get_by_id_proto_fail));
     else if (slot.slotBase() == asCell(baseValue)->structure()->prototypeForLookup(callFrame)) {
+        ASSERT(!asCell(baseValue)->structure()->isDictionary());
         // Since we're accessing a prototype in a loop, it's a good bet that it
         // should not be treated as a dictionary.
-        if (slotBaseObject->structure()->isDictionary())
-            slotBaseObject->setStructure(Structure::fromDictionaryTransition(slotBaseObject->structure()));
+        if (slotBaseObject->structure()->isDictionary()) {
+            slotBaseObject->flattenDictionaryObject();
+            offset = slotBaseObject->structure()->get(propertyName);
+        }
 
         int listIndex;
         PolymorphicAccessStructureList* prototypeStructureList = getPolymorphicAccessStructureListSlot(stubInfo, listIndex);
 
-        JIT::compileGetByIdProtoList(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, prototypeStructureList, listIndex, structure, slotBaseObject->structure(), slot.cachedOffset());
+        JIT::compileGetByIdProtoList(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, prototypeStructureList, listIndex, structure, slotBaseObject->structure(), offset);
 
         if (listIndex == (POLYMORPHIC_LIST_CACHE_SIZE - 1))
             ctiPatchCallByReturnAddress(codeBlock, STUB_RETURN_ADDRESS, FunctionPtr(cti_op_get_by_id_proto_list_full));
-    } else if (size_t count = countPrototypeChainEntriesAndCheckForProxies(callFrame, baseValue, slot)) {
-        StructureChain* protoChain = structure->prototypeChain(callFrame);
-        if (!protoChain->isCacheable()) {
-            ctiPatchCallByReturnAddress(codeBlock, STUB_RETURN_ADDRESS, FunctionPtr(cti_op_get_by_id_proto_fail));
-            return JSValue::encode(result);
-        }
-        
+    } else if (size_t count = normalizePrototypeChain(callFrame, baseValue, slot.slotBase(), propertyName, offset)) {
+        ASSERT(!asCell(baseValue)->structure()->isDictionary());
         int listIndex;
         PolymorphicAccessStructureList* prototypeStructureList = getPolymorphicAccessStructureListSlot(stubInfo, listIndex);
-        JIT::compileGetByIdChainList(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, prototypeStructureList, listIndex, structure, protoChain, count, slot.cachedOffset());
+
+        StructureChain* protoChain = structure->prototypeChain(callFrame);
+        JIT::compileGetByIdChainList(callFrame->scopeChain()->globalData, callFrame, codeBlock, stubInfo, prototypeStructureList, listIndex, structure, protoChain, count, offset);
 
         if (listIndex == (POLYMORPHIC_LIST_CACHE_SIZE - 1))
             ctiPatchCallByReturnAddress(codeBlock, STUB_RETURN_ADDRESS, FunctionPtr(cti_op_get_by_id_proto_list_full));
@@ -1452,7 +1572,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_instanceof)
 
     // ECMA-262 15.3.5.3:
     // Throw an exception either if baseVal is not an object, or if it does not implement 'HasInstance' (i.e. is a function).
-    TypeInfo typeInfo(UnspecifiedType, 0);
+    TypeInfo typeInfo(UnspecifiedType);
     if (!baseVal.isObject() || !(typeInfo = asObject(baseVal)->structure()->typeInfo()).implementsHasInstance()) {
         CallFrame* callFrame = stackFrame.callFrame;
         CodeBlock* codeBlock = callFrame->codeBlock();
@@ -1520,7 +1640,7 @@ DEFINE_STUB_FUNCTION(void*, op_call_JSFunction)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
 
-#ifndef NDEBUG
+#if !ASSERT_DISABLED
     CallData callData;
     ASSERT(stackFrame.args[0].jsValue().getCallData(callData) == CallTypeJS);
 #endif
@@ -1769,7 +1889,7 @@ DEFINE_STUB_FUNCTION(JSObject*, op_construct_JSConstruct)
         VM_THROW_EXCEPTION();
     }
 
-#ifndef NDEBUG
+#if !ASSERT_DISABLED
     ConstructData constructData;
     ASSERT(constructor->getConstructData(constructData) == ConstructTypeJS);
 #endif
@@ -1778,7 +1898,7 @@ DEFINE_STUB_FUNCTION(JSObject*, op_construct_JSConstruct)
     if (stackFrame.args[3].jsValue().isObject())
         structure = asObject(stackFrame.args[3].jsValue())->inheritorID();
     else
-        structure = constructor->scope().node()->globalObject()->emptyObjectStructure();
+        structure = constructor->scope().node()->globalObject->emptyObjectStructure();
 #ifdef QT_BUILD_SCRIPT_LIB
     return new (stackFrame.globalData) QT_PREPEND_NAMESPACE(QScriptObject)(structure);
 #else
@@ -1843,7 +1963,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_get_by_val)
         } else if (isJSString(globalData, baseValue) && asString(baseValue)->canGetIndex(i)) {
             // All fast byte array accesses are safe from exceptions so return immediately to avoid exception checks.
             ctiPatchCallByReturnAddress(callFrame->codeBlock(), STUB_RETURN_ADDRESS, FunctionPtr(cti_op_get_by_val_string));
-            result = asString(baseValue)->getIndex(stackFrame.globalData, i);
+            result = asString(baseValue)->getIndex(callFrame, i);
         } else if (isJSByteArray(globalData, baseValue) && asByteArray(baseValue)->canAccessIndex(i)) {
             // All fast byte array accesses are safe from exceptions so return immediately to avoid exception checks.
             ctiPatchCallByReturnAddress(callFrame->codeBlock(), STUB_RETURN_ADDRESS, FunctionPtr(cti_op_get_by_val_byte_array));
@@ -1874,7 +1994,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_get_by_val_string)
     if (LIKELY(subscript.isUInt32())) {
         uint32_t i = subscript.asUInt32();
         if (isJSString(globalData, baseValue) && asString(baseValue)->canGetIndex(i))
-            result = asString(baseValue)->getIndex(stackFrame.globalData, i);
+            result = asString(baseValue)->getIndex(callFrame, i);
         else {
             result = baseValue.get(callFrame, i);
             if (!isJSString(globalData, baseValue))
@@ -2039,19 +2159,6 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_lesseq)
     return JSValue::encode(result);
 }
 
-DEFINE_STUB_FUNCTION(int, op_loop_if_true)
-{
-    STUB_INIT_STACK_FRAME(stackFrame);
-
-    JSValue src1 = stackFrame.args[0].jsValue();
-
-    CallFrame* callFrame = stackFrame.callFrame;
-
-    bool result = src1.toBoolean(callFrame);
-    CHECK_FOR_EXCEPTION_AT_END();
-    return result;
-}
-    
 DEFINE_STUB_FUNCTION(int, op_load_varargs)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
@@ -2326,8 +2433,6 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_post_inc)
     return JSValue::encode(number);
 }
 
-#if USE(JSVALUE32_64)
-
 DEFINE_STUB_FUNCTION(int, op_eq)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
@@ -2335,6 +2440,7 @@ DEFINE_STUB_FUNCTION(int, op_eq)
     JSValue src1 = stackFrame.args[0].jsValue();
     JSValue src2 = stackFrame.args[1].jsValue();
 
+#if USE(JSVALUE32_64)
     start:
     if (src2.isUndefined()) {
         return src1.isNull() || 
@@ -2390,20 +2496,20 @@ DEFINE_STUB_FUNCTION(int, op_eq)
 
     if (cell1->isString()) {
         if (src2.isInt32())
-            return static_cast<JSString*>(cell1)->value().toDouble() == src2.asInt32();
+            return static_cast<JSString*>(cell1)->value(stackFrame.callFrame).toDouble() == src2.asInt32();
             
         if (src2.isDouble())
-            return static_cast<JSString*>(cell1)->value().toDouble() == src2.asDouble();
+            return static_cast<JSString*>(cell1)->value(stackFrame.callFrame).toDouble() == src2.asDouble();
 
         if (src2.isTrue())
-            return static_cast<JSString*>(cell1)->value().toDouble() == 1.0;
+            return static_cast<JSString*>(cell1)->value(stackFrame.callFrame).toDouble() == 1.0;
 
         if (src2.isFalse())
-            return static_cast<JSString*>(cell1)->value().toDouble() == 0.0;
+            return static_cast<JSString*>(cell1)->value(stackFrame.callFrame).toDouble() == 0.0;
 
         JSCell* cell2 = asCell(src2);
         if (cell2->isString())
-            return static_cast<JSString*>(cell1)->value() == static_cast<JSString*>(cell2)->value();
+            return static_cast<JSString*>(cell1)->value(stackFrame.callFrame) == static_cast<JSString*>(cell2)->value(stackFrame.callFrame);
 
         src2 = asObject(cell2)->toPrimitive(stackFrame.callFrame);
         CHECK_FOR_EXCEPTION();
@@ -2420,8 +2526,18 @@ DEFINE_STUB_FUNCTION(int, op_eq)
     src1 = asObject(cell1)->toPrimitive(stackFrame.callFrame);
     CHECK_FOR_EXCEPTION();
     goto start;
+    
+#else // USE(JSVALUE32_64)
+    CallFrame* callFrame = stackFrame.callFrame;
+    
+    bool result = JSValue::equalSlowCaseInline(callFrame, src1, src2);
+    CHECK_FOR_EXCEPTION_AT_END();
+    return result;
+#endif // USE(JSVALUE32_64)
 }
 
+#if USE(JSVALUE32_64)
+
 DEFINE_STUB_FUNCTION(int, op_eq_strings)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
@@ -2431,26 +2547,10 @@ DEFINE_STUB_FUNCTION(int, op_eq_strings)
 
     ASSERT(string1->isString());
     ASSERT(string2->isString());
-    return string1->value() == string2->value();
-}
-
-#else // USE(JSVALUE32_64)
-
-DEFINE_STUB_FUNCTION(int, op_eq)
-{
-    STUB_INIT_STACK_FRAME(stackFrame);
-
-    JSValue src1 = stackFrame.args[0].jsValue();
-    JSValue src2 = stackFrame.args[1].jsValue();
-
-    CallFrame* callFrame = stackFrame.callFrame;
-
-    bool result = JSValue::equalSlowCaseInline(callFrame, src1, src2);
-    CHECK_FOR_EXCEPTION_AT_END();
-    return result;
+    return string1->value(stackFrame.callFrame) == string2->value(stackFrame.callFrame);
 }
 
-#endif // USE(JSVALUE32_64)
+#endif
 
 DEFINE_STUB_FUNCTION(EncodedJSValue, op_lshift)
 {
@@ -2668,7 +2768,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_call_eval)
     Register* newCallFrame = callFrame->registers() + registerOffset;
     Register* argv = newCallFrame - RegisterFile::CallFrameHeaderSize - argCount;
     JSValue thisValue = argv[0].jsValue();
-    JSGlobalObject* globalObject = callFrame->scopeChain()->globalObject();
+    JSGlobalObject* globalObject = callFrame->scopeChain()->globalObject;
 
     if (thisValue == globalObject && funcVal == globalObject->evalFunction()) {
         JSValue exceptionValue;
@@ -2699,7 +2799,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_throw)
 
     if (!handler) {
         *stackFrame.exception = exceptionValue;
-        STUB_SET_RETURN_ADDRESS(reinterpret_cast<void*>(ctiOpThrowNotCaught));
+        STUB_SET_RETURN_ADDRESS(FunctionPtr(ctiOpThrowNotCaught).value());
         return JSValue::encode(jsNull());
     }
 
@@ -2714,18 +2814,22 @@ DEFINE_STUB_FUNCTION(JSPropertyNameIterator*, op_get_pnames)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
 
-    return JSPropertyNameIterator::create(stackFrame.callFrame, stackFrame.args[0].jsValue());
+    CallFrame* callFrame = stackFrame.callFrame;
+    JSObject* o = stackFrame.args[0].jsObject();
+    Structure* structure = o->structure();
+    JSPropertyNameIterator* jsPropertyNameIterator = structure->enumerationCache();
+    if (!jsPropertyNameIterator || jsPropertyNameIterator->cachedPrototypeChain() != structure->prototypeChain(callFrame))
+        jsPropertyNameIterator = JSPropertyNameIterator::create(callFrame, o);
+    return jsPropertyNameIterator;
 }
 
-DEFINE_STUB_FUNCTION(EncodedJSValue, op_next_pname)
+DEFINE_STUB_FUNCTION(int, has_property)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
 
-    JSPropertyNameIterator* it = stackFrame.args[0].propertyNameIterator();
-    JSValue temp = it->next(stackFrame.callFrame);
-    if (!temp)
-        it->invalidate();
-    return JSValue::encode(temp);
+    JSObject* base = stackFrame.args[0].jsObject();
+    JSString* property = stackFrame.args[1].jsString();
+    return base->hasProperty(stackFrame.callFrame, Identifier(stackFrame.callFrame, property->value(stackFrame.callFrame)));
 }
 
 DEFINE_STUB_FUNCTION(JSObject*, op_push_scope)
@@ -2802,7 +2906,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_stricteq)
     JSValue src1 = stackFrame.args[0].jsValue();
     JSValue src2 = stackFrame.args[1].jsValue();
 
-    return JSValue::encode(jsBoolean(JSValue::strictEqual(src1, src2)));
+    return JSValue::encode(jsBoolean(JSValue::strictEqual(stackFrame.callFrame, src1, src2)));
 }
 
 DEFINE_STUB_FUNCTION(EncodedJSValue, op_to_primitive)
@@ -2816,7 +2920,9 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_strcat)
 {
     STUB_INIT_STACK_FRAME(stackFrame);
 
-    return JSValue::encode(concatenateStrings(stackFrame.callFrame, &stackFrame.callFrame->registers()[stackFrame.args[0].int32()], stackFrame.args[1].int32()));
+    JSValue result = jsString(stackFrame.callFrame, &stackFrame.callFrame->registers()[stackFrame.args[0].int32()], stackFrame.args[1].int32());
+    CHECK_FOR_EXCEPTION_AT_END();
+    return JSValue::encode(result);
 }
 
 DEFINE_STUB_FUNCTION(EncodedJSValue, op_nstricteq)
@@ -2826,7 +2932,7 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, op_nstricteq)
     JSValue src1 = stackFrame.args[0].jsValue();
     JSValue src2 = stackFrame.args[1].jsValue();
 
-    return JSValue::encode(jsBoolean(!JSValue::strictEqual(src1, src2)));
+    return JSValue::encode(jsBoolean(!JSValue::strictEqual(stackFrame.callFrame, src1, src2)));
 }
 
 DEFINE_STUB_FUNCTION(EncodedJSValue, op_to_jsnumber)
@@ -2935,7 +3041,7 @@ DEFINE_STUB_FUNCTION(void*, op_switch_char)
     void* result = codeBlock->characterSwitchJumpTable(tableIndex).ctiDefault.executableAddress();
 
     if (scrutinee.isString()) {
-        UString::Rep* value = asString(scrutinee)->value().rep();
+        UString::Rep* value = asString(scrutinee)->value(callFrame).rep();
         if (value->size() == 1)
             result = codeBlock->characterSwitchJumpTable(tableIndex).ctiForValue(value->data()[0]).executableAddress();
     }
@@ -2955,7 +3061,7 @@ DEFINE_STUB_FUNCTION(void*, op_switch_string)
     void* result = codeBlock->stringSwitchJumpTable(tableIndex).ctiDefault.executableAddress();
 
     if (scrutinee.isString()) {
-        UString::Rep* value = asString(scrutinee)->value().rep();
+        UString::Rep* value = asString(scrutinee)->value(callFrame).rep();
         result = codeBlock->stringSwitchJumpTable(tableIndex).ctiForValue(value).executableAddress();
     }
 
@@ -3034,9 +3140,8 @@ DEFINE_STUB_FUNCTION(void, op_debug)
     int debugHookID = stackFrame.args[0].int32();
     int firstLine = stackFrame.args[1].int32();
     int lastLine = stackFrame.args[2].int32();
-    int column = stackFrame.args[3].int32();
 
-    stackFrame.globalData->interpreter->debug(callFrame, static_cast<DebugHookID>(debugHookID), firstLine, lastLine, column);
+    stackFrame.globalData->interpreter->debug(callFrame, static_cast<DebugHookID>(debugHookID), firstLine, lastLine);
 }
 
 #ifdef QT_BUILD_SCRIPT_LIB
@@ -3092,6 +3197,14 @@ DEFINE_STUB_FUNCTION(EncodedJSValue, vm_throw)
     return JSValue::encode(exceptionValue);
 }
 
+DEFINE_STUB_FUNCTION(EncodedJSValue, to_object)
+{
+    STUB_INIT_STACK_FRAME(stackFrame);
+
+    CallFrame* callFrame = stackFrame.callFrame;
+    return JSValue::encode(stackFrame.args[0].jsValue().toObject(callFrame));
+}
+
 } // namespace JSC
 
- #endif // ENABLE(JIT)
+#endif // ENABLE(JIT)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h
index c2b8c02..da80133 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h
@@ -63,6 +63,7 @@ namespace JSC {
         int32_t asInt32;
 
         JSValue jsValue() { return JSValue::decode(asEncodedJSValue); }
+        JSObject* jsObject() { return static_cast<JSObject*>(asPointer); }
         Identifier& identifier() { return *static_cast<Identifier*>(asPointer); }
         int32_t int32() { return asInt32; }
         CodeBlock* codeBlock() { return static_cast<CodeBlock*>(asPointer); }
@@ -74,7 +75,7 @@ namespace JSC {
         ReturnAddressPtr returnAddress() { return ReturnAddressPtr(asPointer); }
     };
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     struct JITStackFrame {
         void* reserved; // Unused
         JITStubArg args[6];
@@ -98,7 +99,7 @@ namespace JSC {
         // When JIT code makes a call, it pushes its return address just below the rest of the stack.
         ReturnAddressPtr* returnAddressSlot() { return reinterpret_cast<ReturnAddressPtr*>(this) - 1; }
     };
-#elif PLATFORM(X86)
+#elif CPU(X86)
 #if COMPILER(MSVC)
 #pragma pack(push)
 #pragma pack(4)
@@ -129,7 +130,7 @@ namespace JSC {
 #if COMPILER(MSVC)
 #pragma pack(pop)
 #endif // COMPILER(MSVC)
-#elif PLATFORM(ARM_THUMB2)
+#elif CPU(ARM_THUMB2)
     struct JITStackFrame {
         void* reserved; // Unused
         JITStubArg args[6];
@@ -157,11 +158,13 @@ namespace JSC {
         
         ReturnAddressPtr* returnAddressSlot() { return &thunkReturnAddress; }
     };
-#elif PLATFORM(ARM_TRADITIONAL)
+#elif CPU(ARM_TRADITIONAL)
     struct JITStackFrame {
         JITStubArg padding; // Unused
         JITStubArg args[7];
 
+        ReturnAddressPtr thunkReturnAddress;
+
         void* preservedR4;
         void* preservedR5;
         void* preservedR6;
@@ -172,16 +175,20 @@ namespace JSC {
         RegisterFile* registerFile;
         CallFrame* callFrame;
         JSValue* exception;
+
+        // These arguments passed on the stack.
         Profiler** enabledProfilerReference;
         JSGlobalData* globalData;
 
         // When JIT code makes a call, it pushes its return address just below the rest of the stack.
-        ReturnAddressPtr* returnAddressSlot() { return reinterpret_cast<ReturnAddressPtr*>(this) - 1; }
+        ReturnAddressPtr* returnAddressSlot() { return &thunkReturnAddress; }
     };
 #else
 #error "JITStackFrame not defined for this platform."
 #endif
 
+#define JITSTACKFRAME_ARGS_INDEX (OBJECT_OFFSETOF(JITStackFrame, args) / sizeof(void*))
+
 #if USE(JIT_STUB_ARGUMENT_VA_LIST)
     #define STUB_ARGS_DECLARATION void* args, ...
     #define STUB_ARGS (reinterpret_cast<void**>(vl_args) - 1)
@@ -195,16 +202,16 @@ namespace JSC {
     #define STUB_ARGS_DECLARATION void** args
     #define STUB_ARGS (args)
 
-    #if PLATFORM(X86) && COMPILER(MSVC)
+    #if CPU(X86) && COMPILER(MSVC)
     #define JIT_STUB __fastcall
-    #elif PLATFORM(X86) && COMPILER(GCC)
+    #elif CPU(X86) && COMPILER(GCC)
     #define JIT_STUB  __attribute__ ((fastcall))
     #else
     #define JIT_STUB
     #endif
 #endif
 
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
     struct VoidPtrPair {
         void* first;
         void* second;
@@ -289,7 +296,6 @@ extern "C" {
     EncodedJSValue JIT_STUB cti_op_mod(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_mul(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_negate(STUB_ARGS_DECLARATION);
-    EncodedJSValue JIT_STUB cti_op_next_pname(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_not(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_nstricteq(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_post_dec(STUB_ARGS_DECLARATION);
@@ -311,6 +317,7 @@ extern "C" {
     EncodedJSValue JIT_STUB cti_op_typeof(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_urshift(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_vm_throw(STUB_ARGS_DECLARATION);
+    EncodedJSValue JIT_STUB cti_to_object(STUB_ARGS_DECLARATION);
     JSObject* JIT_STUB cti_op_construct_JSConstruct(STUB_ARGS_DECLARATION);
     JSObject* JIT_STUB cti_op_new_array(STUB_ARGS_DECLARATION);
     JSObject* JIT_STUB cti_op_new_error(STUB_ARGS_DECLARATION);
@@ -332,10 +339,9 @@ extern "C" {
     int JIT_STUB cti_op_jlesseq(STUB_ARGS_DECLARATION);
     int JIT_STUB cti_op_jtrue(STUB_ARGS_DECLARATION);
     int JIT_STUB cti_op_load_varargs(STUB_ARGS_DECLARATION);
-    int JIT_STUB cti_op_loop_if_less(STUB_ARGS_DECLARATION);
     int JIT_STUB cti_op_loop_if_lesseq(STUB_ARGS_DECLARATION);
-    int JIT_STUB cti_op_loop_if_true(STUB_ARGS_DECLARATION);
     int JIT_STUB cti_timeout_check(STUB_ARGS_DECLARATION);
+    int JIT_STUB cti_has_property(STUB_ARGS_DECLARATION);
     void JIT_STUB cti_op_create_arguments(STUB_ARGS_DECLARATION);
     void JIT_STUB cti_op_create_arguments_no_params(STUB_ARGS_DECLARATION);
     void JIT_STUB cti_op_debug(STUB_ARGS_DECLARATION);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jsc.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/jsc.cpp
index ee4e393..252fb96 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jsc.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jsc.cpp
@@ -29,6 +29,7 @@
 #include "JSArray.h"
 #include "JSFunction.h"
 #include "JSLock.h"
+#include "JSString.h"
 #include "PrototypeFunction.h"
 #include "SamplingTool.h"
 #include <math.h>
@@ -36,7 +37,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#if !PLATFORM(WIN_OS)
+#if !OS(WINDOWS)
 #include <unistd.h>
 #endif
 
@@ -53,10 +54,10 @@
 #include <signal.h>
 #endif
 
-#if COMPILER(MSVC) && !PLATFORM(WINCE)
+#if COMPILER(MSVC) && !OS(WINCE)
 #include <crtdbg.h>
-#include <windows.h>
 #include <mmsystem.h>
+#include <windows.h>
 #endif
 
 #if PLATFORM(QT)
@@ -87,8 +88,8 @@ static JSValue JSC_HOST_CALL functionClearSamplingFlags(ExecState*, JSObject*, J
 
 struct Script {
     bool isFile;
-    char *argument;
-    
+    char* argument;
+
     Script(bool isFile, char *argument)
         : isFile(isFile)
         , argument(argument)
@@ -173,12 +174,12 @@ GlobalObject::GlobalObject(const Vector<UString>& arguments)
 JSValue JSC_HOST_CALL functionPrint(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
     for (unsigned i = 0; i < args.size(); ++i) {
-        if (i != 0)
+        if (i)
             putchar(' ');
-        
+
         printf("%s", args.at(i).toString(exec).UTF8String().c_str());
     }
-    
+
     putchar('\n');
     fflush(stdout);
     return jsUndefined();
@@ -193,7 +194,7 @@ JSValue JSC_HOST_CALL functionDebug(ExecState* exec, JSObject*, JSValue, const A
 JSValue JSC_HOST_CALL functionGC(ExecState* exec, JSObject*, JSValue, const ArgList&)
 {
     JSLock lock(SilenceAssertionsOnly);
-    exec->heap()->collect();
+    exec->heap()->collectAllGarbage();
     return jsUndefined();
 }
 
@@ -291,8 +292,18 @@ JSValue JSC_HOST_CALL functionReadline(ExecState* exec, JSObject*, JSValue, cons
 
 JSValue JSC_HOST_CALL functionQuit(ExecState* exec, JSObject*, JSValue, const ArgList&)
 {
+    // Technically, destroying the heap in the middle of JS execution is a no-no,
+    // but we want to maintain compatibility with the Mozilla test suite, so
+    // we pretend that execution has terminated to avoid ASSERTs, then tear down the heap.
+    exec->globalData().dynamicGlobalObject = 0;
+
     cleanupGlobalData(&exec->globalData());
     exit(EXIT_SUCCESS);
+
+#if COMPILER(MSVC) && OS(WINCE)
+    // Without this, Visual Studio will complain that this method does not return a value.
+    return jsUndefined();
+#endif
 }
 
 // Use SEH for Release builds only to get rid of the crash report dialog
@@ -312,7 +323,7 @@ int jscmain(int argc, char** argv, JSGlobalData*);
 
 int main(int argc, char** argv)
 {
-#if defined(_DEBUG) && PLATFORM(WIN_OS)
+#if defined(_DEBUG) && OS(WINDOWS)
     _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
     _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
     _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
@@ -321,7 +332,7 @@ int main(int argc, char** argv)
     _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
 #endif
 
-#if COMPILER(MSVC) && !PLATFORM(WINCE)
+#if COMPILER(MSVC) && !OS(WINCE)
     timeBeginPeriod(1);
 #endif
 
@@ -360,11 +371,8 @@ static bool runWithScripts(GlobalObject* globalObject, const Vector<Script>& scr
     if (dump)
         BytecodeGenerator::setDumpsGeneratedCode(true);
 
-#if ENABLE(OPCODE_SAMPLING)
-    Interpreter* interpreter = globalObject->globalData()->interpreter;
-    interpreter->setSampler(new SamplingTool(interpreter));
-    interpreter->sampler()->setup();
-#endif
+    JSGlobalData* globalData = globalObject->globalData();
+
 #if ENABLE(SAMPLING_FLAGS)
     SamplingFlags::start();
 #endif
@@ -381,9 +389,7 @@ static bool runWithScripts(GlobalObject* globalObject, const Vector<Script>& scr
             fileName = "[Command Line]";
         }
 
-#if ENABLE(SAMPLING_THREAD)
-        SamplingThread::start();
-#endif
+        globalData->startSampling();
 
         Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), makeSource(script, fileName));
         success = success && completion.complType() != Throw;
@@ -394,20 +400,14 @@ static bool runWithScripts(GlobalObject* globalObject, const Vector<Script>& scr
                 printf("End: %s\n", completion.value().toString(globalObject->globalExec()).ascii());
         }
 
-#if ENABLE(SAMPLING_THREAD)
-        SamplingThread::stop();
-#endif
-
+        globalData->stopSampling();
         globalObject->globalExec()->clearException();
     }
 
 #if ENABLE(SAMPLING_FLAGS)
     SamplingFlags::stop();
 #endif
-#if ENABLE(OPCODE_SAMPLING)
-    interpreter->sampler()->dump(globalObject->globalExec());
-    delete interpreter->sampler();
-#endif
+    globalData->dumpSampleData(globalObject->globalExec());
 #if ENABLE(SAMPLING_COUNTERS)
     AbstractSamplingCounter::dump();
 #endif
@@ -473,30 +473,27 @@ static void parseArguments(int argc, char** argv, Options& options, JSGlobalData
     int i = 1;
     for (; i < argc; ++i) {
         const char* arg = argv[i];
-        if (strcmp(arg, "-f") == 0) {
+        if (!strcmp(arg, "-f")) {
             if (++i == argc)
                 printUsageStatement(globalData);
             options.scripts.append(Script(true, argv[i]));
             continue;
         }
-        if (strcmp(arg, "-e") == 0) {
+        if (!strcmp(arg, "-e")) {
             if (++i == argc)
                 printUsageStatement(globalData);
             options.scripts.append(Script(false, argv[i]));
             continue;
         }
-        if (strcmp(arg, "-h") == 0 || strcmp(arg, "--help") == 0) {
-            printUsageStatement(globalData, true);
-        }
-        if (strcmp(arg, "-i") == 0) {
+        if (!strcmp(arg, "-i")) {
             options.interactive = true;
             continue;
         }
-        if (strcmp(arg, "-d") == 0) {
+        if (!strcmp(arg, "-d")) {
             options.dump = true;
             continue;
         }
-        if (strcmp(arg, "-s") == 0) {
+        if (!strcmp(arg, "-s")) {
 #if HAVE(SIGNAL_H)
             signal(SIGILL, _exit);
             signal(SIGFPE, _exit);
@@ -505,16 +502,18 @@ static void parseArguments(int argc, char** argv, Options& options, JSGlobalData
 #endif
             continue;
         }
-        if (strcmp(arg, "--") == 0) {
+        if (!strcmp(arg, "--")) {
             ++i;
             break;
         }
+        if (!strcmp(arg, "-h") || !strcmp(arg, "--help"))
+            printUsageStatement(globalData, true);
         options.scripts.append(Script(true, argv[i]));
     }
-    
+
     if (options.scripts.isEmpty())
         options.interactive = true;
-    
+
     for (; i < argc; ++i)
         options.arguments.append(argv[i]);
 }
@@ -542,20 +541,20 @@ static bool fillBufferWithContentsOfFile(const UString& fileName, Vector<char>&
         return false;
     }
 
-    size_t buffer_size = 0;
-    size_t buffer_capacity = 1024;
+    size_t bufferSize = 0;
+    size_t bufferCapacity = 1024;
 
-    buffer.resize(buffer_capacity);
+    buffer.resize(bufferCapacity);
 
     while (!feof(f) && !ferror(f)) {
-        buffer_size += fread(buffer.data() + buffer_size, 1, buffer_capacity - buffer_size, f);
-        if (buffer_size == buffer_capacity) { // guarantees space for trailing '\0'
-            buffer_capacity *= 2;
-            buffer.resize(buffer_capacity);
+        bufferSize += fread(buffer.data() + bufferSize, 1, bufferCapacity - bufferSize, f);
+        if (bufferSize == bufferCapacity) { // guarantees space for trailing '\0'
+            bufferCapacity *= 2;
+            buffer.resize(bufferCapacity);
         }
     }
     fclose(f);
-    buffer[buffer_size] = '\0';
+    buffer[bufferSize] = '\0';
 
     return true;
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/os-win32/WinMain.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/os-win32/WinMain.cpp
new file mode 100644
index 0000000..17800d0
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/os-win32/WinMain.cpp
@@ -0,0 +1,81 @@
+/*
+ *  Copyright (C) 2009 Patrick Gansterer (paroga@paroga.com)
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "Vector.h"
+#include <winbase.h>
+#include <winnls.h>
+#include <wtf/UnusedParam.h>
+
+int main(int argc, char** argv);
+
+static inline char* convertToUtf8(LPCWSTR widecharString, int length)
+{
+    int requiredSize = WideCharToMultiByte(CP_UTF8, 0, widecharString, length, 0, 0, 0, 0);
+    char* multibyteString = new char[requiredSize + 1];
+
+    WideCharToMultiByte(CP_UTF8, 0, widecharString, length, multibyteString, requiredSize, 0, 0);
+    multibyteString[requiredSize] = '\0';
+
+    return multibyteString;
+}
+
+int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow)
+{
+    UNUSED_PARAM(hInstance);
+    UNUSED_PARAM(hPrevInstance);
+    UNUSED_PARAM(nCmdShow);
+
+    Vector<char*> arguments;
+    TCHAR buffer[MAX_PATH];
+
+    int length = GetModuleFileNameW(0, buffer, MAX_PATH);
+    arguments.append(convertToUtf8(buffer, length));
+
+    WCHAR* commandLine = lpCmdLine;
+    while (commandLine[0] != '\0') {
+        int commandLineLength = 1;
+        WCHAR endChar = ' ';
+
+        while (commandLine[0] == ' ')
+            ++commandLine;
+
+        if (commandLine[0] == '\"') {
+            ++commandLine;
+            endChar = '\"';
+        }
+
+        while (commandLine[commandLineLength] != endChar && commandLine[commandLineLength] != '\0')
+            ++commandLineLength;
+
+        arguments.append(convertToUtf8(commandLine, commandLineLength));
+
+        commandLine += commandLineLength;
+        if (endChar != ' ' && commandLine[0] != '\0')
+            ++commandLine;
+    }
+
+    int res = main(arguments.size(), arguments.data());
+
+    for (size_t i = 0; i < arguments.size(); i++)
+        delete arguments[i];
+
+    return res;
+}
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Grammar.y b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Grammar.y
index fa4ffd0..717a266 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Grammar.y
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Grammar.y
@@ -27,6 +27,7 @@
 
 #include "JSObject.h"
 #include "JSString.h"
+#include "Lexer.h"
 #include "NodeConstructors.h"
 #include "NodeInfo.h"
 #include <stdlib.h>
@@ -42,13 +43,12 @@
 // Default values for bison.
 #define YYDEBUG 0 // Set to 1 to debug a parse error.
 #define jscyydebug 0 // Set to 1 to debug a parse error.
-#if !PLATFORM(DARWIN)
+#if !OS(DARWIN)
 // Avoid triggering warnings in older bison by not setting this on the Darwin platform.
 // FIXME: Is this still needed?
 #define YYERROR_VERBOSE
 #endif
 
-int jscyylex(void* lvalp, void* llocp, void* globalPtr);
 int jscyyerror(const char*);
 
 static inline bool allowAutomaticSemicolon(JSC::Lexer&, int);
@@ -179,7 +179,7 @@ static inline void appendToVarDeclarationList(JSGlobalData* globalData, ParserAr
 
 template <typename T> inline void setStatementLocation(StatementNode* statement, const T& start, const T& end)
 {
-    statement->setLoc(start.first_line, end.last_line, start.first_column);
+    statement->setLoc(start.first_line, end.last_line);
 }
 
 static inline void setExceptionLocation(ThrowableExpressionData* node, unsigned start, unsigned divot, unsigned end)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.cpp
index a85ed3d..e616c7a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.cpp
@@ -39,19 +39,10 @@ using namespace Unicode;
 // We can't specify the namespace in yacc's C output, so do it here instead.
 using namespace JSC;
 
-#ifndef KDE_USE_FINAL
 #include "Grammar.h"
-#endif
-
 #include "Lookup.h"
 #include "Lexer.lut.h"
 
-// A bridge for yacc from the C world to the C++ world.
-int jscyylex(void* lvalp, void* llocp, void* globalData)
-{
-    return static_cast<JSGlobalData*>(globalData)->lexer->lex(lvalp, llocp);
-}
-
 namespace JSC {
 
 static const UChar byteOrderMark = 0xFEFF;
@@ -652,6 +643,8 @@ inStringEscapeSequence:
         shiftLineTerminator();
         goto inString;
     }
+    if (m_current == -1)
+        goto returnError;
     record16(singleEscape(m_current));
     shift1();
     goto inString;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.h b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.h
index 174e05a..c76696c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Lexer.h
@@ -136,6 +136,12 @@ namespace JSC {
         return (convertHex(c1, c2) << 8) | convertHex(c3, c4);
     }
 
+    // A bridge for yacc from the C world to the C++ world.
+    inline int jscyylex(void* lvalp, void* llocp, void* globalData)
+    {
+        return static_cast<JSGlobalData*>(globalData)->lexer->lex(lvalp, llocp);
+    }
+
 } // namespace JSC
 
 #endif // Lexer_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/NodeConstructors.h b/src/3rdparty/javascriptcore/JavaScriptCore/parser/NodeConstructors.h
index 5431e18..8c9135f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/NodeConstructors.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/NodeConstructors.h
@@ -46,7 +46,6 @@ namespace JSC {
     inline StatementNode::StatementNode(JSGlobalData* globalData)
         : Node(globalData)
         , m_lastLine(-1)
-        , m_column(-1)
     {
     }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.cpp
index 89bbc11..4b97e9a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.cpp
@@ -49,71 +49,13 @@ using namespace WTF;
 
 namespace JSC {
 
-/*
-    Details of the emitBytecode function.
-
-    Return value: The register holding the production's value.
-             dst: An optional parameter specifying the most efficient destination at
-                  which to store the production's value. The callee must honor dst.
-
-    The dst argument provides for a crude form of copy propagation. For example,
-
-        x = 1
-
-    becomes
-    
-        load r[x], 1
-    
-    instead of 
-
-        load r0, 1
-        mov r[x], r0
-    
-    because the assignment node, "x =", passes r[x] as dst to the number node, "1".
-*/
-
-// ------------------------------ ThrowableExpressionData --------------------------------
-
-static void substitute(UString& string, const UString& substring)
-{
-    int position = string.find("%s");
-    ASSERT(position != -1);
-    UString newString = string.substr(0, position);
-    newString.append(substring);
-    newString.append(string.substr(position + 2));
-    string = newString;
-}
-
-RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* message)
-{
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    RegisterID* exception = generator.emitNewError(generator.newTemporary(), type, jsString(generator.globalData(), message));
-    generator.emitThrow(exception);
-    return exception;
-}
-
-RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* messageTemplate, const UString& label)
-{
-    UString message = messageTemplate;
-    substitute(message, label);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    RegisterID* exception = generator.emitNewError(generator.newTemporary(), type, jsString(generator.globalData(), message));
-    generator.emitThrow(exception);
-    return exception;
-}
-
-inline RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* messageTemplate, const Identifier& label)
-{
-    return emitThrowError(generator, type, messageTemplate, label.ustring());
-}
 
 // ------------------------------ StatementNode --------------------------------
 
-void StatementNode::setLoc(int firstLine, int lastLine, int column)
+void StatementNode::setLoc(int firstLine, int lastLine)
 {
     m_line = firstLine;
     m_lastLine = lastLine;
-    m_column = column;
 }
 
 // ------------------------------ SourceElements --------------------------------
@@ -131,1754 +73,6 @@ inline StatementNode* SourceElements::singleStatement() const
     return size == 1 ? m_statements[0] : 0;
 }
 
-inline StatementNode* SourceElements::lastStatement() const
-{
-    size_t size = m_statements.size();
-    return size ? m_statements[size - 1] : 0;
-}
-
-// ------------------------------ NullNode -------------------------------------
-
-RegisterID* NullNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult())
-        return 0;
-    return generator.emitLoad(dst, jsNull());
-}
-
-// ------------------------------ BooleanNode ----------------------------------
-
-RegisterID* BooleanNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult())
-        return 0;
-    return generator.emitLoad(dst, m_value);
-}
-
-// ------------------------------ NumberNode -----------------------------------
-
-RegisterID* NumberNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult())
-        return 0;
-    return generator.emitLoad(dst, m_value);
-}
-
-// ------------------------------ StringNode -----------------------------------
-
-RegisterID* StringNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult())
-        return 0;
-    return generator.emitLoad(dst, m_value);
-}
-
-// ------------------------------ RegExpNode -----------------------------------
-
-RegisterID* RegExpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegExp> regExp = RegExp::create(generator.globalData(), m_pattern.ustring(), m_flags.ustring());
-    if (!regExp->isValid())
-        return emitThrowError(generator, SyntaxError, "Invalid regular expression: %s", regExp->errorMessage());
-    if (dst == generator.ignoredResult())
-        return 0;
-    return generator.emitNewRegExp(generator.finalDestination(dst), regExp.get());
-}
-
-// ------------------------------ ThisNode -------------------------------------
-
-RegisterID* ThisNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult())
-        return 0;
-    return generator.moveToDestinationIfNeeded(dst, generator.thisRegister());
-}
-
-// ------------------------------ ResolveNode ----------------------------------
-
-bool ResolveNode::isPure(BytecodeGenerator& generator) const
-{
-    return generator.isLocal(m_ident);
-}
-
-RegisterID* ResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (RegisterID* local = generator.registerFor(m_ident)) {
-        if (dst == generator.ignoredResult())
-            return 0;
-        return generator.moveToDestinationIfNeeded(dst, local);
-    }
-    
-    generator.emitExpressionInfo(m_startOffset + m_ident.size(), m_ident.size(), 0);
-    return generator.emitResolve(generator.finalDestination(dst), m_ident);
-}
-
-// ------------------------------ ArrayNode ------------------------------------
-
-RegisterID* ArrayNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    // FIXME: Should we put all of this code into emitNewArray?
-
-    unsigned length = 0;
-    ElementNode* firstPutElement;
-    for (firstPutElement = m_element; firstPutElement; firstPutElement = firstPutElement->next()) {
-        if (firstPutElement->elision())
-            break;
-        ++length;
-    }
-
-    if (!firstPutElement && !m_elision)
-        return generator.emitNewArray(generator.finalDestination(dst), m_element);
-
-    RefPtr<RegisterID> array = generator.emitNewArray(generator.tempDestination(dst), m_element);
-
-    for (ElementNode* n = firstPutElement; n; n = n->next()) {
-        RegisterID* value = generator.emitNode(n->value());
-        length += n->elision();
-        generator.emitPutByIndex(array.get(), length++, value);
-    }
-
-    if (m_elision) {
-        RegisterID* value = generator.emitLoad(0, jsNumber(generator.globalData(), m_elision + length));
-        generator.emitPutById(array.get(), generator.propertyNames().length, value);
-    }
-
-    return generator.moveToDestinationIfNeeded(dst, array.get());
-}
-
-bool ArrayNode::isSimpleArray() const
-{
-    if (m_elision || m_optional)
-        return false;
-    for (ElementNode* ptr = m_element; ptr; ptr = ptr->next()) {
-        if (ptr->elision())
-            return false;
-    }
-    return true;
-}
-
-ArgumentListNode* ArrayNode::toArgumentList(JSGlobalData* globalData) const
-{
-    ASSERT(!m_elision && !m_optional);
-    ElementNode* ptr = m_element;
-    if (!ptr)
-        return 0;
-    ArgumentListNode* head = new (globalData) ArgumentListNode(globalData, ptr->value());
-    ArgumentListNode* tail = head;
-    ptr = ptr->next();
-    for (; ptr; ptr = ptr->next()) {
-        ASSERT(!ptr->elision());
-        tail = new (globalData) ArgumentListNode(globalData, tail, ptr->value());
-    }
-    return head;
-}
-
-// ------------------------------ ObjectLiteralNode ----------------------------
-
-RegisterID* ObjectLiteralNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-     if (!m_list) {
-         if (dst == generator.ignoredResult())
-             return 0;
-         return generator.emitNewObject(generator.finalDestination(dst));
-     }
-     return generator.emitNode(dst, m_list);
-}
-
-// ------------------------------ PropertyListNode -----------------------------
-
-RegisterID* PropertyListNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> newObj = generator.tempDestination(dst);
-    
-    generator.emitNewObject(newObj.get());
-    
-    for (PropertyListNode* p = this; p; p = p->m_next) {
-        RegisterID* value = generator.emitNode(p->m_node->m_assign);
-        
-        switch (p->m_node->m_type) {
-            case PropertyNode::Constant: {
-                generator.emitPutById(newObj.get(), p->m_node->name(), value);
-                break;
-            }
-            case PropertyNode::Getter: {
-                generator.emitPutGetter(newObj.get(), p->m_node->name(), value);
-                break;
-            }
-            case PropertyNode::Setter: {
-                generator.emitPutSetter(newObj.get(), p->m_node->name(), value);
-                break;
-            }
-            default:
-                ASSERT_NOT_REACHED();
-        }
-    }
-    
-    return generator.moveToDestinationIfNeeded(dst, newObj.get());
-}
-
-// ------------------------------ BracketAccessorNode --------------------------------
-
-RegisterID* BracketAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments, m_subscript->isPure(generator));
-    RegisterID* property = generator.emitNode(m_subscript);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitGetByVal(generator.finalDestination(dst), base.get(), property);
-}
-
-// ------------------------------ DotAccessorNode --------------------------------
-
-RegisterID* DotAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RegisterID* base = generator.emitNode(m_base);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitGetById(generator.finalDestination(dst), base, m_ident);
-}
-
-// ------------------------------ ArgumentListNode -----------------------------
-
-RegisterID* ArgumentListNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    ASSERT(m_expr);
-    return generator.emitNode(dst, m_expr);
-}
-
-// ------------------------------ NewExprNode ----------------------------------
-
-RegisterID* NewExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> func = generator.emitNode(m_expr);
-    return generator.emitConstruct(generator.finalDestination(dst), func.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ EvalFunctionCallNode ----------------------------------
-
-RegisterID* EvalFunctionCallNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> func = generator.tempDestination(dst);
-    RefPtr<RegisterID> thisRegister = generator.newTemporary();
-    generator.emitExpressionInfo(divot() - startOffset() + 4, 4, 0);
-    generator.emitResolveWithBase(thisRegister.get(), func.get(), generator.propertyNames().eval);
-    return generator.emitCallEval(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallValueNode ----------------------------------
-
-RegisterID* FunctionCallValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> func = generator.emitNode(m_expr);
-    RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
-    return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallResolveNode ----------------------------------
-
-RegisterID* FunctionCallResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (RefPtr<RegisterID> local = generator.registerFor(m_ident)) {
-        RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
-        return generator.emitCall(generator.finalDestination(dst, thisRegister.get()), local.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-    }
-
-    int index = 0;
-    size_t depth = 0;
-    JSObject* globalObject = 0;
-    if (generator.findScopedProperty(m_ident, index, depth, false, globalObject) && index != missingSymbolMarker()) {
-        RefPtr<RegisterID> func = generator.emitGetScopedVar(generator.newTemporary(), depth, index, globalObject);
-        RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
-        return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-    }
-
-    RefPtr<RegisterID> func = generator.newTemporary();
-    RefPtr<RegisterID> thisRegister = generator.newTemporary();
-    int identifierStart = divot() - startOffset();
-    generator.emitExpressionInfo(identifierStart + m_ident.size(), m_ident.size(), 0);
-    generator.emitResolveWithBase(thisRegister.get(), func.get(), m_ident);
-    return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallBracketNode ----------------------------------
-
-RegisterID* FunctionCallBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNode(m_base);
-    RegisterID* property = generator.emitNode(m_subscript);
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    RefPtr<RegisterID> function = generator.emitGetByVal(generator.tempDestination(dst), base.get(), property);
-    RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
-    return generator.emitCall(generator.finalDestination(dst, function.get()), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallDotNode ----------------------------------
-
-RegisterID* FunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> function = generator.tempDestination(dst);
-    RefPtr<RegisterID> thisRegister = generator.newTemporary();
-    generator.emitNode(thisRegister.get(), m_base);
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    generator.emitMethodCheck();
-    generator.emitGetById(function.get(), thisRegister.get(), m_ident);
-    return generator.emitCall(generator.finalDestination(dst, function.get()), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-RegisterID* CallFunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<Label> realCall = generator.newLabel();
-    RefPtr<Label> end = generator.newLabel();
-    RefPtr<RegisterID> base = generator.emitNode(m_base);
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    RefPtr<RegisterID> function = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
-    RefPtr<RegisterID> finalDestination = generator.finalDestination(dst, function.get());
-    generator.emitJumpIfNotFunctionCall(function.get(), realCall.get());
-    {
-        RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
-        RefPtr<RegisterID> thisRegister = generator.newTemporary();
-        ArgumentListNode* oldList = m_args->m_listNode;
-        if (m_args->m_listNode && m_args->m_listNode->m_expr) {
-            generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
-            m_args->m_listNode = m_args->m_listNode->m_next;
-        } else
-            generator.emitLoad(thisRegister.get(), jsNull());
-
-        generator.emitCall(finalDestination.get(), realFunction.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-        generator.emitJump(end.get());
-        m_args->m_listNode = oldList;
-    }
-    generator.emitLabel(realCall.get());
-    {
-        RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
-        generator.emitCall(finalDestination.get(), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-    }
-    generator.emitLabel(end.get());
-    return finalDestination.get();
-}
-    
-static bool areTrivialApplyArguments(ArgumentsNode* args)
-{
-    return !args->m_listNode || !args->m_listNode->m_expr || !args->m_listNode->m_next
-        || (!args->m_listNode->m_next->m_next && args->m_listNode->m_next->m_expr->isSimpleArray());
-}
-
-RegisterID* ApplyFunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    // A few simple cases can be trivially handled as ordinary function calls.
-    // function.apply(), function.apply(arg) -> identical to function.call
-    // function.apply(thisArg, [arg0, arg1, ...]) -> can be trivially coerced into function.call(thisArg, arg0, arg1, ...) and saves object allocation
-    bool mayBeCall = areTrivialApplyArguments(m_args);
-
-    RefPtr<Label> realCall = generator.newLabel();
-    RefPtr<Label> end = generator.newLabel();
-    RefPtr<RegisterID> base = generator.emitNode(m_base);
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    RefPtr<RegisterID> function = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
-    RefPtr<RegisterID> finalDestination = generator.finalDestination(dst, function.get());
-    generator.emitJumpIfNotFunctionApply(function.get(), realCall.get());
-    {
-        if (mayBeCall) {
-            RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
-            RefPtr<RegisterID> thisRegister = generator.newTemporary();
-            ArgumentListNode* oldList = m_args->m_listNode;
-            if (m_args->m_listNode && m_args->m_listNode->m_expr) {
-                generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
-                m_args->m_listNode = m_args->m_listNode->m_next;
-                if (m_args->m_listNode) {
-                    ASSERT(m_args->m_listNode->m_expr->isSimpleArray());
-                    ASSERT(!m_args->m_listNode->m_next);
-                    m_args->m_listNode = static_cast<ArrayNode*>(m_args->m_listNode->m_expr)->toArgumentList(generator.globalData());
-                }
-            } else
-                generator.emitLoad(thisRegister.get(), jsNull());
-            generator.emitCall(finalDestination.get(), realFunction.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-            m_args->m_listNode = oldList;
-        } else {
-            ASSERT(m_args->m_listNode && m_args->m_listNode->m_next);
-            RefPtr<RegisterID> realFunction = generator.emitMove(generator.newTemporary(), base.get());
-            RefPtr<RegisterID> argsCountRegister = generator.newTemporary();
-            RefPtr<RegisterID> thisRegister = generator.newTemporary();
-            RefPtr<RegisterID> argsRegister = generator.newTemporary();
-            generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
-            ArgumentListNode* args = m_args->m_listNode->m_next;
-            bool isArgumentsApply = false;
-            if (args->m_expr->isResolveNode()) {
-                ResolveNode* resolveNode = static_cast<ResolveNode*>(args->m_expr);
-                isArgumentsApply = generator.willResolveToArguments(resolveNode->identifier());
-                if (isArgumentsApply)
-                    generator.emitMove(argsRegister.get(), generator.uncheckedRegisterForArguments());
-            }
-            if (!isArgumentsApply)
-                generator.emitNode(argsRegister.get(), args->m_expr);
-            while ((args = args->m_next))
-                generator.emitNode(args->m_expr);
-
-            generator.emitLoadVarargs(argsCountRegister.get(), argsRegister.get());
-            generator.emitCallVarargs(finalDestination.get(), realFunction.get(), thisRegister.get(), argsCountRegister.get(), divot(), startOffset(), endOffset());
-        }
-        generator.emitJump(end.get());
-    }
-    generator.emitLabel(realCall.get());
-    {
-        RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
-        generator.emitCall(finalDestination.get(), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-    }
-    generator.emitLabel(end.get());
-    return finalDestination.get();
-}
-
-// ------------------------------ PostfixResolveNode ----------------------------------
-
-static RegisterID* emitPreIncOrDec(BytecodeGenerator& generator, RegisterID* srcDst, Operator oper)
-{
-    return (oper == OpPlusPlus) ? generator.emitPreInc(srcDst) : generator.emitPreDec(srcDst);
-}
-
-static RegisterID* emitPostIncOrDec(BytecodeGenerator& generator, RegisterID* dst, RegisterID* srcDst, Operator oper)
-{
-    if (srcDst == dst)
-        return generator.emitToJSNumber(dst, srcDst);
-    return (oper == OpPlusPlus) ? generator.emitPostInc(dst, srcDst) : generator.emitPostDec(dst, srcDst);
-}
-
-RegisterID* PostfixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (RegisterID* local = generator.registerFor(m_ident)) {
-        if (generator.isLocalConstant(m_ident)) {
-            if (dst == generator.ignoredResult())
-                return 0;
-            return generator.emitToJSNumber(generator.finalDestination(dst), local);
-        }
-
-        if (dst == generator.ignoredResult())
-            return emitPreIncOrDec(generator, local, m_operator);
-        return emitPostIncOrDec(generator, generator.finalDestination(dst), local, m_operator);
-    }
-
-    int index = 0;
-    size_t depth = 0;
-    JSObject* globalObject = 0;
-    if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
-        RefPtr<RegisterID> value = generator.emitGetScopedVar(generator.newTemporary(), depth, index, globalObject);
-        RegisterID* oldValue;
-        if (dst == generator.ignoredResult()) {
-            oldValue = 0;
-            emitPreIncOrDec(generator, value.get(), m_operator);
-        } else {
-            oldValue = emitPostIncOrDec(generator, generator.finalDestination(dst), value.get(), m_operator);
-        }
-        generator.emitPutScopedVar(depth, index, value.get(), globalObject);
-        return oldValue;
-    }
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    RefPtr<RegisterID> value = generator.newTemporary();
-    RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), value.get(), m_ident);
-    RegisterID* oldValue;
-    if (dst == generator.ignoredResult()) {
-        oldValue = 0;
-        emitPreIncOrDec(generator, value.get(), m_operator);
-    } else {
-        oldValue = emitPostIncOrDec(generator, generator.finalDestination(dst), value.get(), m_operator);
-    }
-    generator.emitPutById(base.get(), m_ident, value.get());
-    return oldValue;
-}
-
-// ------------------------------ PostfixBracketNode ----------------------------------
-
-RegisterID* PostfixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNode(m_base);
-    RefPtr<RegisterID> property = generator.emitNode(m_subscript);
-
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    RefPtr<RegisterID> value = generator.emitGetByVal(generator.newTemporary(), base.get(), property.get());
-    RegisterID* oldValue;
-    if (dst == generator.ignoredResult()) {
-        oldValue = 0;
-        if (m_operator == OpPlusPlus)
-            generator.emitPreInc(value.get());
-        else
-            generator.emitPreDec(value.get());
-    } else {
-        oldValue = (m_operator == OpPlusPlus) ? generator.emitPostInc(generator.finalDestination(dst), value.get()) : generator.emitPostDec(generator.finalDestination(dst), value.get());
-    }
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitPutByVal(base.get(), property.get(), value.get());
-    return oldValue;
-}
-
-// ------------------------------ PostfixDotNode ----------------------------------
-
-RegisterID* PostfixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNode(m_base);
-
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    RefPtr<RegisterID> value = generator.emitGetById(generator.newTemporary(), base.get(), m_ident);
-    RegisterID* oldValue;
-    if (dst == generator.ignoredResult()) {
-        oldValue = 0;
-        if (m_operator == OpPlusPlus)
-            generator.emitPreInc(value.get());
-        else
-            generator.emitPreDec(value.get());
-    } else {
-        oldValue = (m_operator == OpPlusPlus) ? generator.emitPostInc(generator.finalDestination(dst), value.get()) : generator.emitPostDec(generator.finalDestination(dst), value.get());
-    }
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitPutById(base.get(), m_ident, value.get());
-    return oldValue;
-}
-
-// ------------------------------ PostfixErrorNode -----------------------------------
-
-RegisterID* PostfixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus
-        ? "Postfix ++ operator applied to value that is not a reference."
-        : "Postfix -- operator applied to value that is not a reference.");
-}
-
-// ------------------------------ DeleteResolveNode -----------------------------------
-
-RegisterID* DeleteResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (generator.registerFor(m_ident))
-        return generator.emitLoad(generator.finalDestination(dst), false);
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    RegisterID* base = generator.emitResolveBase(generator.tempDestination(dst), m_ident);
-    return generator.emitDeleteById(generator.finalDestination(dst, base), base, m_ident);
-}
-
-// ------------------------------ DeleteBracketNode -----------------------------------
-
-RegisterID* DeleteBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> r0 = generator.emitNode(m_base);
-    RegisterID* r1 = generator.emitNode(m_subscript);
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitDeleteByVal(generator.finalDestination(dst), r0.get(), r1);
-}
-
-// ------------------------------ DeleteDotNode -----------------------------------
-
-RegisterID* DeleteDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RegisterID* r0 = generator.emitNode(m_base);
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitDeleteById(generator.finalDestination(dst), r0, m_ident);
-}
-
-// ------------------------------ DeleteValueNode -----------------------------------
-
-RegisterID* DeleteValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitNode(generator.ignoredResult(), m_expr);
-
-    // delete on a non-location expression ignores the value and returns true
-    return generator.emitLoad(generator.finalDestination(dst), true);
-}
-
-// ------------------------------ VoidNode -------------------------------------
-
-RegisterID* VoidNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult()) {
-        generator.emitNode(generator.ignoredResult(), m_expr);
-        return 0;
-    }
-    RefPtr<RegisterID> r0 = generator.emitNode(m_expr);
-    return generator.emitLoad(dst, jsUndefined());
-}
-
-// ------------------------------ TypeOfValueNode -----------------------------------
-
-RegisterID* TypeOfResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (RegisterID* local = generator.registerFor(m_ident)) {
-        if (dst == generator.ignoredResult())
-            return 0;
-        return generator.emitTypeOf(generator.finalDestination(dst), local);
-    }
-
-    RefPtr<RegisterID> scratch = generator.emitResolveBase(generator.tempDestination(dst), m_ident);
-    generator.emitGetById(scratch.get(), scratch.get(), m_ident);
-    if (dst == generator.ignoredResult())
-        return 0;
-    return generator.emitTypeOf(generator.finalDestination(dst, scratch.get()), scratch.get());
-}
-
-// ------------------------------ TypeOfValueNode -----------------------------------
-
-RegisterID* TypeOfValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult()) {
-        generator.emitNode(generator.ignoredResult(), m_expr);
-        return 0;
-    }
-    RefPtr<RegisterID> src = generator.emitNode(m_expr);
-    return generator.emitTypeOf(generator.finalDestination(dst), src.get());
-}
-
-// ------------------------------ PrefixResolveNode ----------------------------------
-
-RegisterID* PrefixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (RegisterID* local = generator.registerFor(m_ident)) {
-        if (generator.isLocalConstant(m_ident)) {
-            if (dst == generator.ignoredResult())
-                return 0;
-            RefPtr<RegisterID> r0 = generator.emitLoad(generator.finalDestination(dst), (m_operator == OpPlusPlus) ? 1.0 : -1.0);
-            return generator.emitBinaryOp(op_add, r0.get(), local, r0.get(), OperandTypes());
-        }
-
-        emitPreIncOrDec(generator, local, m_operator);
-        return generator.moveToDestinationIfNeeded(dst, local);
-    }
-
-    int index = 0;
-    size_t depth = 0;
-    JSObject* globalObject = 0;
-    if (generator.findScopedProperty(m_ident, index, depth, false, globalObject) && index != missingSymbolMarker()) {
-        RefPtr<RegisterID> propDst = generator.emitGetScopedVar(generator.tempDestination(dst), depth, index, globalObject);
-        emitPreIncOrDec(generator, propDst.get(), m_operator);
-        generator.emitPutScopedVar(depth, index, propDst.get(), globalObject);
-        return generator.moveToDestinationIfNeeded(dst, propDst.get());
-    }
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    RefPtr<RegisterID> propDst = generator.tempDestination(dst);
-    RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), propDst.get(), m_ident);
-    emitPreIncOrDec(generator, propDst.get(), m_operator);
-    generator.emitPutById(base.get(), m_ident, propDst.get());
-    return generator.moveToDestinationIfNeeded(dst, propDst.get());
-}
-
-// ------------------------------ PrefixBracketNode ----------------------------------
-
-RegisterID* PrefixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNode(m_base);
-    RefPtr<RegisterID> property = generator.emitNode(m_subscript);
-    RefPtr<RegisterID> propDst = generator.tempDestination(dst);
-
-    generator.emitExpressionInfo(divot() + m_subexpressionDivotOffset, m_subexpressionStartOffset, endOffset() - m_subexpressionDivotOffset);
-    RegisterID* value = generator.emitGetByVal(propDst.get(), base.get(), property.get());
-    if (m_operator == OpPlusPlus)
-        generator.emitPreInc(value);
-    else
-        generator.emitPreDec(value);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitPutByVal(base.get(), property.get(), value);
-    return generator.moveToDestinationIfNeeded(dst, propDst.get());
-}
-
-// ------------------------------ PrefixDotNode ----------------------------------
-
-RegisterID* PrefixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNode(m_base);
-    RefPtr<RegisterID> propDst = generator.tempDestination(dst);
-
-    generator.emitExpressionInfo(divot() + m_subexpressionDivotOffset, m_subexpressionStartOffset, endOffset() - m_subexpressionDivotOffset);
-    RegisterID* value = generator.emitGetById(propDst.get(), base.get(), m_ident);
-    if (m_operator == OpPlusPlus)
-        generator.emitPreInc(value);
-    else
-        generator.emitPreDec(value);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitPutById(base.get(), m_ident, value);
-    return generator.moveToDestinationIfNeeded(dst, propDst.get());
-}
-
-// ------------------------------ PrefixErrorNode -----------------------------------
-
-RegisterID* PrefixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus
-        ? "Prefix ++ operator applied to value that is not a reference."
-        : "Prefix -- operator applied to value that is not a reference.");
-}
-
-// ------------------------------ Unary Operation Nodes -----------------------------------
-
-RegisterID* UnaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RegisterID* src = generator.emitNode(m_expr);
-    return generator.emitUnaryOp(opcodeID(), generator.finalDestination(dst), src);
-}
-
-// ------------------------------ Binary Operation Nodes -----------------------------------
-
-// BinaryOpNode::emitStrcat:
-//
-// This node generates an op_strcat operation.  This opcode can handle concatenation of three or
-// more values, where we can determine a set of separate op_add operations would be operating on
-// string values.
-//
-// This function expects to be operating on a graph of AST nodes looking something like this:
-//
-//     (a)...     (b)
-//          \   /
-//           (+)     (c)
-//              \   /
-//      [d]     ((+))
-//         \    /
-//          [+=]
-//
-// The assignment operation is optional, if it exists the register holding the value on the
-// lefthand side of the assignment should be passing as the optional 'lhs' argument.
-//
-// The method should be called on the node at the root of the tree of regular binary add
-// operations (marked in the diagram with a double set of parentheses).  This node must
-// be performing a string concatenation (determined by statically detecting that at least
-// one child must be a string).  
-//
-// Since the minimum number of values being concatenated together is expected to be 3, if
-// a lhs to a concatenating assignment is not provided then the  root add should have at
-// least one left child that is also an add that can be determined to be operating on strings.
-//
-RegisterID* BinaryOpNode::emitStrcat(BytecodeGenerator& generator, RegisterID* dst, RegisterID* lhs, ReadModifyResolveNode* emitExpressionInfoForMe)
-{
-    ASSERT(isAdd());
-    ASSERT(resultDescriptor().definitelyIsString());
-
-    // Create a list of expressions for all the adds in the tree of nodes we can convert into
-    // a string concatenation.  The rightmost node (c) is added first.  The rightmost node is
-    // added first, and the leftmost child is never added, so the vector produced for the
-    // example above will be [ c, b ].
-    Vector<ExpressionNode*, 16> reverseExpressionList;
-    reverseExpressionList.append(m_expr2);
-
-    // Examine the left child of the add.  So long as this is a string add, add its right-child
-    // to the list, and keep processing along the left fork.
-    ExpressionNode* leftMostAddChild = m_expr1;
-    while (leftMostAddChild->isAdd() && leftMostAddChild->resultDescriptor().definitelyIsString()) {
-        reverseExpressionList.append(static_cast<AddNode*>(leftMostAddChild)->m_expr2);
-        leftMostAddChild = static_cast<AddNode*>(leftMostAddChild)->m_expr1;
-    }
-
-    Vector<RefPtr<RegisterID>, 16> temporaryRegisters;
-
-    // If there is an assignment, allocate a temporary to hold the lhs after conversion.
-    // We could possibly avoid this (the lhs is converted last anyway, we could let the
-    // op_strcat node handle its conversion if required).
-    if (lhs)
-        temporaryRegisters.append(generator.newTemporary());
-
-    // Emit code for the leftmost node ((a) in the example).
-    temporaryRegisters.append(generator.newTemporary());
-    RegisterID* leftMostAddChildTempRegister = temporaryRegisters.last().get();
-    generator.emitNode(leftMostAddChildTempRegister, leftMostAddChild);
-
-    // Note on ordering of conversions:
-    //
-    // We maintain the same ordering of conversions as we would see if the concatenations
-    // was performed as a sequence of adds (otherwise this optimization could change
-    // behaviour should an object have been provided a valueOf or toString method).
-    //
-    // Considering the above example, the sequnce of execution is:
-    //     * evaluate operand (a)
-    //     * evaluate operand (b)
-    //     * convert (a) to primitive   <-  (this would be triggered by the first add)
-    //     * convert (b) to primitive   <-  (ditto)
-    //     * evaluate operand (c)
-    //     * convert (c) to primitive   <-  (this would be triggered by the second add)
-    // And optionally, if there is an assignment:
-    //     * convert (d) to primitive   <-  (this would be triggered by the assigning addition)
-    //
-    // As such we do not plant an op to convert the leftmost child now.  Instead, use
-    // 'leftMostAddChildTempRegister' as a flag to trigger generation of the conversion
-    // once the second node has been generated.  However, if the leftmost child is an
-    // immediate we can trivially determine that no conversion will be required.
-    // If this is the case
-    if (leftMostAddChild->isString())
-        leftMostAddChildTempRegister = 0;
-
-    while (reverseExpressionList.size()) {
-        ExpressionNode* node = reverseExpressionList.last();
-        reverseExpressionList.removeLast();
-
-        // Emit the code for the current node.
-        temporaryRegisters.append(generator.newTemporary());
-        generator.emitNode(temporaryRegisters.last().get(), node);
-
-        // On the first iteration of this loop, when we first reach this point we have just
-        // generated the second node, which means it is time to convert the leftmost operand.
-        if (leftMostAddChildTempRegister) {
-            generator.emitToPrimitive(leftMostAddChildTempRegister, leftMostAddChildTempRegister);
-            leftMostAddChildTempRegister = 0; // Only do this once.
-        }
-        // Plant a conversion for this node, if necessary.
-        if (!node->isString())
-            generator.emitToPrimitive(temporaryRegisters.last().get(), temporaryRegisters.last().get());
-    }
-    ASSERT(temporaryRegisters.size() >= 3);
-
-    // Certain read-modify nodes require expression info to be emitted *after* m_right has been generated.
-    // If this is required the node is passed as 'emitExpressionInfoForMe'; do so now.
-    if (emitExpressionInfoForMe)
-        generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->startOffset(), emitExpressionInfoForMe->endOffset());
-
-    // If there is an assignment convert the lhs now.  This will also copy lhs to
-    // the temporary register we allocated for it.
-    if (lhs)
-        generator.emitToPrimitive(temporaryRegisters[0].get(), lhs);
-
-    return generator.emitStrcat(generator.finalDestination(dst, temporaryRegisters[0].get()), temporaryRegisters[0].get(), temporaryRegisters.size());
-}
-
-RegisterID* BinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    OpcodeID opcodeID = this->opcodeID();
-
-    if (opcodeID == op_add && m_expr1->isAdd() && m_expr1->resultDescriptor().definitelyIsString())
-        return emitStrcat(generator, dst);
-
-    if (opcodeID == op_neq) {
-        if (m_expr1->isNull() || m_expr2->isNull()) {
-            RefPtr<RegisterID> src = generator.tempDestination(dst);
-            generator.emitNode(src.get(), m_expr1->isNull() ? m_expr2 : m_expr1);
-            return generator.emitUnaryOp(op_neq_null, generator.finalDestination(dst, src.get()), src.get());
-        }
-    }
-
-    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
-    RegisterID* src2 = generator.emitNode(m_expr2);
-    return generator.emitBinaryOp(opcodeID, generator.finalDestination(dst, src1.get()), src1.get(), src2, OperandTypes(m_expr1->resultDescriptor(), m_expr2->resultDescriptor()));
-}
-
-RegisterID* EqualNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (m_expr1->isNull() || m_expr2->isNull()) {
-        RefPtr<RegisterID> src = generator.tempDestination(dst);
-        generator.emitNode(src.get(), m_expr1->isNull() ? m_expr2 : m_expr1);
-        return generator.emitUnaryOp(op_eq_null, generator.finalDestination(dst, src.get()), src.get());
-    }
-
-    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
-    RegisterID* src2 = generator.emitNode(m_expr2);
-    return generator.emitEqualityOp(op_eq, generator.finalDestination(dst, src1.get()), src1.get(), src2);
-}
-
-RegisterID* StrictEqualNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
-    RegisterID* src2 = generator.emitNode(m_expr2);
-    return generator.emitEqualityOp(op_stricteq, generator.finalDestination(dst, src1.get()), src1.get(), src2);
-}
-
-RegisterID* ReverseBinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
-    RegisterID* src2 = generator.emitNode(m_expr2);
-    return generator.emitBinaryOp(opcodeID(), generator.finalDestination(dst, src1.get()), src2, src1.get(), OperandTypes(m_expr2->resultDescriptor(), m_expr1->resultDescriptor()));
-}
-
-RegisterID* ThrowableBinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
-    RegisterID* src2 = generator.emitNode(m_expr2);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitBinaryOp(opcodeID(), generator.finalDestination(dst, src1.get()), src1.get(), src2, OperandTypes(m_expr1->resultDescriptor(), m_expr2->resultDescriptor()));
-}
-
-RegisterID* InstanceOfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
-    RefPtr<RegisterID> src2 = generator.emitNode(m_expr2);
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitGetByIdExceptionInfo(op_instanceof);
-    RegisterID* src2Prototype = generator.emitGetById(generator.newTemporary(), src2.get(), generator.globalData()->propertyNames->prototype);
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitInstanceOf(generator.finalDestination(dst, src1.get()), src1.get(), src2.get(), src2Prototype);
-}
-
-// ------------------------------ LogicalOpNode ----------------------------
-
-RegisterID* LogicalOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> temp = generator.tempDestination(dst);
-    RefPtr<Label> target = generator.newLabel();
-    
-    generator.emitNode(temp.get(), m_expr1);
-    if (m_operator == OpLogicalAnd)
-        generator.emitJumpIfFalse(temp.get(), target.get());
-    else
-        generator.emitJumpIfTrue(temp.get(), target.get());
-    generator.emitNode(temp.get(), m_expr2);
-    generator.emitLabel(target.get());
-
-    return generator.moveToDestinationIfNeeded(dst, temp.get());
-}
-
-// ------------------------------ ConditionalNode ------------------------------
-
-RegisterID* ConditionalNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> newDst = generator.finalDestination(dst);
-    RefPtr<Label> beforeElse = generator.newLabel();
-    RefPtr<Label> afterElse = generator.newLabel();
-
-    RegisterID* cond = generator.emitNode(m_logical);
-    generator.emitJumpIfFalse(cond, beforeElse.get());
-
-    generator.emitNode(newDst.get(), m_expr1);
-    generator.emitJump(afterElse.get());
-
-    generator.emitLabel(beforeElse.get());
-    generator.emitNode(newDst.get(), m_expr2);
-
-    generator.emitLabel(afterElse.get());
-
-    return newDst.get();
-}
-
-// ------------------------------ ReadModifyResolveNode -----------------------------------
-
-// FIXME: should this be moved to be a method on BytecodeGenerator?
-static ALWAYS_INLINE RegisterID* emitReadModifyAssignment(BytecodeGenerator& generator, RegisterID* dst, RegisterID* src1, ExpressionNode* m_right, Operator oper, OperandTypes types, ReadModifyResolveNode* emitExpressionInfoForMe = 0)
-{
-    OpcodeID opcodeID;
-    switch (oper) {
-        case OpMultEq:
-            opcodeID = op_mul;
-            break;
-        case OpDivEq:
-            opcodeID = op_div;
-            break;
-        case OpPlusEq:
-            if (m_right->isAdd() && m_right->resultDescriptor().definitelyIsString())
-                return static_cast<AddNode*>(m_right)->emitStrcat(generator, dst, src1, emitExpressionInfoForMe);
-            opcodeID = op_add;
-            break;
-        case OpMinusEq:
-            opcodeID = op_sub;
-            break;
-        case OpLShift:
-            opcodeID = op_lshift;
-            break;
-        case OpRShift:
-            opcodeID = op_rshift;
-            break;
-        case OpURShift:
-            opcodeID = op_urshift;
-            break;
-        case OpAndEq:
-            opcodeID = op_bitand;
-            break;
-        case OpXOrEq:
-            opcodeID = op_bitxor;
-            break;
-        case OpOrEq:
-            opcodeID = op_bitor;
-            break;
-        case OpModEq:
-            opcodeID = op_mod;
-            break;
-        default:
-            ASSERT_NOT_REACHED();
-            return dst;
-    }
-
-    RegisterID* src2 = generator.emitNode(m_right);
-
-    // Certain read-modify nodes require expression info to be emitted *after* m_right has been generated.
-    // If this is required the node is passed as 'emitExpressionInfoForMe'; do so now.
-    if (emitExpressionInfoForMe)
-        generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->startOffset(), emitExpressionInfoForMe->endOffset());
-
-    return generator.emitBinaryOp(opcodeID, dst, src1, src2, types);
-}
-
-RegisterID* ReadModifyResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (RegisterID* local = generator.registerFor(m_ident)) {
-        if (generator.isLocalConstant(m_ident)) {
-            return emitReadModifyAssignment(generator, generator.finalDestination(dst), local, m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-        }
-        
-        if (generator.leftHandSideNeedsCopy(m_rightHasAssignments, m_right->isPure(generator))) {
-            RefPtr<RegisterID> result = generator.newTemporary();
-            generator.emitMove(result.get(), local);
-            emitReadModifyAssignment(generator, result.get(), result.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-            generator.emitMove(local, result.get());
-            return generator.moveToDestinationIfNeeded(dst, result.get());
-        }
-        
-        RegisterID* result = emitReadModifyAssignment(generator, local, local, m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-        return generator.moveToDestinationIfNeeded(dst, result);
-    }
-
-    int index = 0;
-    size_t depth = 0;
-    JSObject* globalObject = 0;
-    if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
-        RefPtr<RegisterID> src1 = generator.emitGetScopedVar(generator.tempDestination(dst), depth, index, globalObject);
-        RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-        generator.emitPutScopedVar(depth, index, result, globalObject);
-        return result;
-    }
-
-    RefPtr<RegisterID> src1 = generator.tempDestination(dst);
-    generator.emitExpressionInfo(divot() - startOffset() + m_ident.size(), m_ident.size(), 0);
-    RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), src1.get(), m_ident);
-    RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()), this);
-    return generator.emitPutById(base.get(), m_ident, result);
-}
-
-// ------------------------------ AssignResolveNode -----------------------------------
-
-RegisterID* AssignResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (RegisterID* local = generator.registerFor(m_ident)) {
-        if (generator.isLocalConstant(m_ident))
-            return generator.emitNode(dst, m_right);
-        
-        RegisterID* result = generator.emitNode(local, m_right);
-        return generator.moveToDestinationIfNeeded(dst, result);
-    }
-
-    int index = 0;
-    size_t depth = 0;
-    JSObject* globalObject = 0;
-    if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
-        if (dst == generator.ignoredResult())
-            dst = 0;
-        RegisterID* value = generator.emitNode(dst, m_right);
-        generator.emitPutScopedVar(depth, index, value, globalObject);
-        return value;
-    }
-
-    RefPtr<RegisterID> base = generator.emitResolveBase(generator.newTemporary(), m_ident);
-    if (dst == generator.ignoredResult())
-        dst = 0;
-    RegisterID* value = generator.emitNode(dst, m_right);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitPutById(base.get(), m_ident, value);
-}
-
-// ------------------------------ AssignDotNode -----------------------------------
-
-RegisterID* AssignDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_rightHasAssignments, m_right->isPure(generator));
-    RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
-    RegisterID* result = generator.emitNode(value.get(), m_right);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitPutById(base.get(), m_ident, result);
-    return generator.moveToDestinationIfNeeded(dst, result);
-}
-
-// ------------------------------ ReadModifyDotNode -----------------------------------
-
-RegisterID* ReadModifyDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_rightHasAssignments, m_right->isPure(generator));
-
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    RefPtr<RegisterID> value = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
-    RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    return generator.emitPutById(base.get(), m_ident, updatedValue);
-}
-
-// ------------------------------ AssignErrorNode -----------------------------------
-
-RegisterID* AssignErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    return emitThrowError(generator, ReferenceError, "Left side of assignment is not a reference.");
-}
-
-// ------------------------------ AssignBracketNode -----------------------------------
-
-RegisterID* AssignBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
-    RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript, m_rightHasAssignments, m_right->isPure(generator));
-    RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
-    RegisterID* result = generator.emitNode(value.get(), m_right);
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitPutByVal(base.get(), property.get(), result);
-    return generator.moveToDestinationIfNeeded(dst, result);
-}
-
-// ------------------------------ ReadModifyBracketNode -----------------------------------
-
-RegisterID* ReadModifyBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
-    RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript, m_rightHasAssignments, m_right->isPure(generator));
-
-    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
-    RefPtr<RegisterID> value = generator.emitGetByVal(generator.tempDestination(dst), base.get(), property.get());
-    RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitPutByVal(base.get(), property.get(), updatedValue);
-
-    return updatedValue;
-}
-
-// ------------------------------ CommaNode ------------------------------------
-
-RegisterID* CommaNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    ASSERT(m_expressions.size() > 1);
-    for (size_t i = 0; i < m_expressions.size() - 1; i++)
-        generator.emitNode(generator.ignoredResult(), m_expressions[i]);
-    return generator.emitNode(dst, m_expressions.last());
-}
-
-// ------------------------------ ConstDeclNode ------------------------------------
-
-RegisterID* ConstDeclNode::emitCodeSingle(BytecodeGenerator& generator)
-{
-    if (RegisterID* local = generator.constRegisterFor(m_ident)) {
-        if (!m_init)
-            return local;
-
-        return generator.emitNode(local, m_init);
-    }
-
-    if (generator.codeType() != EvalCode) {
-        if (m_init)
-            return generator.emitNode(m_init);
-        else
-            return generator.emitResolve(generator.newTemporary(), m_ident);
-    }
-    // FIXME: While this code should only be hit in eval code, it will potentially
-    // assign to the wrong base if m_ident exists in an intervening dynamic scope.
-    RefPtr<RegisterID> base = generator.emitResolveBase(generator.newTemporary(), m_ident);
-    RegisterID* value = m_init ? generator.emitNode(m_init) : generator.emitLoad(0, jsUndefined());
-    return generator.emitPutById(base.get(), m_ident, value);
-}
-
-RegisterID* ConstDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    RegisterID* result = 0;
-    for (ConstDeclNode* n = this; n; n = n->m_next)
-        result = n->emitCodeSingle(generator);
-
-    return result;
-}
-
-// ------------------------------ ConstStatementNode -----------------------------
-
-RegisterID* ConstStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    return generator.emitNode(m_next);
-}
-
-// ------------------------------ SourceElements -------------------------------
-
-inline void SourceElements::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    size_t size = m_statements.size();
-    for (size_t i = 0; i < size; ++i)
-        generator.emitNode(dst, m_statements[i]);
-}
-
-// ------------------------------ BlockNode ------------------------------------
-
-inline StatementNode* BlockNode::lastStatement() const
-{
-    return m_statements ? m_statements->lastStatement() : 0;
-}
-
-RegisterID* BlockNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (m_statements)
-        m_statements->emitBytecode(generator, dst);
-    return 0;
-}
-
-// ------------------------------ EmptyStatementNode ---------------------------
-
-RegisterID* EmptyStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    return dst;
-}
-
-// ------------------------------ DebuggerStatementNode ---------------------------
-
-RegisterID* DebuggerStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(DidReachBreakpoint, firstLine(), lastLine(), column());
-    return dst;
-}
-
-// ------------------------------ ExprStatementNode ----------------------------
-
-RegisterID* ExprStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    ASSERT(m_expr);
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column()); 
-    return generator.emitNode(dst, m_expr);
-}
-
-// ------------------------------ VarStatementNode ----------------------------
-
-RegisterID* VarStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    ASSERT(m_expr);
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    return generator.emitNode(m_expr);
-}
-
-// ------------------------------ IfNode ---------------------------------------
-
-RegisterID* IfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    
-    RefPtr<Label> afterThen = generator.newLabel();
-
-    RegisterID* cond = generator.emitNode(m_condition);
-    generator.emitJumpIfFalse(cond, afterThen.get());
-
-    generator.emitNode(dst, m_ifBlock);
-    generator.emitLabel(afterThen.get());
-
-    // FIXME: This should return the last statement executed so that it can be returned as a Completion.
-    return 0;
-}
-
-// ------------------------------ IfElseNode ---------------------------------------
-
-RegisterID* IfElseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    
-    RefPtr<Label> beforeElse = generator.newLabel();
-    RefPtr<Label> afterElse = generator.newLabel();
-
-    RegisterID* cond = generator.emitNode(m_condition);
-    generator.emitJumpIfFalse(cond, beforeElse.get());
-
-    generator.emitNode(dst, m_ifBlock);
-    generator.emitJump(afterElse.get());
-
-    generator.emitLabel(beforeElse.get());
-
-    generator.emitNode(dst, m_elseBlock);
-
-    generator.emitLabel(afterElse.get());
-
-    // FIXME: This should return the last statement executed so that it can be returned as a Completion.
-    return 0;
-}
-
-// ------------------------------ DoWhileNode ----------------------------------
-
-RegisterID* DoWhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
-    RefPtr<Label> topOfLoop = generator.newLabel();
-    generator.emitLabel(topOfLoop.get());
-
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-   
-    RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
-
-    generator.emitLabel(scope->continueTarget());
-#ifndef QT_BUILD_SCRIPT_LIB
-    generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo(), column());
-#endif
-    RegisterID* cond = generator.emitNode(m_expr);
-    generator.emitJumpIfTrue(cond, topOfLoop.get());
-
-    generator.emitLabel(scope->breakTarget());
-    return result.get();
-}
-
-// ------------------------------ WhileNode ------------------------------------
-
-RegisterID* WhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-#ifdef QT_BUILD_SCRIPT_LIB
-    generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo(), column());
-#endif
-    generator.emitJump(scope->continueTarget());
-
-    RefPtr<Label> topOfLoop = generator.newLabel();
-    generator.emitLabel(topOfLoop.get());
-    
-    generator.emitNode(dst, m_statement);
-
-    generator.emitLabel(scope->continueTarget());
-#ifndef QT_BUILD_SCRIPT_LIB
-    generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo(), column());
-#endif
-    RegisterID* cond = generator.emitNode(m_expr);
-    generator.emitJumpIfTrue(cond, topOfLoop.get());
-
-    generator.emitLabel(scope->breakTarget());
-    
-    // FIXME: This should return the last statement executed so that it can be returned as a Completion
-    return 0;
-}
-
-// ------------------------------ ForNode --------------------------------------
-
-RegisterID* ForNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-
-    if (m_expr1)
-        generator.emitNode(generator.ignoredResult(), m_expr1);
-
-    RefPtr<Label> condition = generator.newLabel();
-    generator.emitJump(condition.get());
-
-    RefPtr<Label> topOfLoop = generator.newLabel();
-    generator.emitLabel(topOfLoop.get());
-
-    RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
-
-    generator.emitLabel(scope->continueTarget());
-#ifndef QT_BUILD_SCRIPT_LIB
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-#endif
-    if (m_expr3)
-        generator.emitNode(generator.ignoredResult(), m_expr3);
-
-    generator.emitLabel(condition.get());
-    if (m_expr2) {
-        RegisterID* cond = generator.emitNode(m_expr2);
-        generator.emitJumpIfTrue(cond, topOfLoop.get());
-    } else
-        generator.emitJump(topOfLoop.get());
-
-    generator.emitLabel(scope->breakTarget());
-    return result.get();
-}
-
-// ------------------------------ ForInNode ------------------------------------
-
-RegisterID* ForInNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
-    if (!m_lexpr->isLocation())
-        return emitThrowError(generator, ReferenceError, "Left side of for-in statement is not a reference.");
-
-    RefPtr<Label> continueTarget = generator.newLabel(); 
-
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-
-    if (m_init)
-        generator.emitNode(generator.ignoredResult(), m_init);
-    RegisterID* forInBase = generator.emitNode(m_expr);
-    RefPtr<RegisterID> iter = generator.emitGetPropertyNames(generator.newTemporary(), forInBase);
-    generator.emitJump(scope->continueTarget());
-
-    RefPtr<Label> loopStart = generator.newLabel();
-    generator.emitLabel(loopStart.get());
-
-    RegisterID* propertyName;
-    if (m_lexpr->isResolveNode()) {
-        const Identifier& ident = static_cast<ResolveNode*>(m_lexpr)->identifier();
-        propertyName = generator.registerFor(ident);
-        if (!propertyName) {
-            propertyName = generator.newTemporary();
-            RefPtr<RegisterID> protect = propertyName;
-            RegisterID* base = generator.emitResolveBase(generator.newTemporary(), ident);
-
-            generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-            generator.emitPutById(base, ident, propertyName);
-        }
-    } else if (m_lexpr->isDotAccessorNode()) {
-        DotAccessorNode* assignNode = static_cast<DotAccessorNode*>(m_lexpr);
-        const Identifier& ident = assignNode->identifier();
-        propertyName = generator.newTemporary();
-        RefPtr<RegisterID> protect = propertyName;
-        RegisterID* base = generator.emitNode(assignNode->base());
-
-        generator.emitExpressionInfo(assignNode->divot(), assignNode->startOffset(), assignNode->endOffset());
-        generator.emitPutById(base, ident, propertyName);
-    } else {
-        ASSERT(m_lexpr->isBracketAccessorNode());
-        BracketAccessorNode* assignNode = static_cast<BracketAccessorNode*>(m_lexpr);
-        propertyName = generator.newTemporary();
-        RefPtr<RegisterID> protect = propertyName;
-        RefPtr<RegisterID> base = generator.emitNode(assignNode->base());
-        RegisterID* subscript = generator.emitNode(assignNode->subscript());
-        
-        generator.emitExpressionInfo(assignNode->divot(), assignNode->startOffset(), assignNode->endOffset());
-        generator.emitPutByVal(base.get(), subscript, propertyName);
-    }   
-
-    generator.emitNode(dst, m_statement);
-
-    generator.emitLabel(scope->continueTarget());
-    generator.emitNextPropertyName(propertyName, iter.get(), loopStart.get());
-#ifndef QT_BUILD_SCRIPT_LIB
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-#endif
-    generator.emitLabel(scope->breakTarget());
-    return dst;
-}
-
-// ------------------------------ ContinueNode ---------------------------------
-
-// ECMA 12.7
-RegisterID* ContinueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    
-    LabelScope* scope = generator.continueTarget(m_ident);
-
-    if (!scope)
-        return m_ident.isEmpty()
-            ? emitThrowError(generator, SyntaxError, "Invalid continue statement.")
-            : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
-
-    generator.emitJumpScopes(scope->continueTarget(), scope->scopeDepth());
-    return dst;
-}
-
-// ------------------------------ BreakNode ------------------------------------
-
-// ECMA 12.8
-RegisterID* BreakNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    
-    LabelScope* scope = generator.breakTarget(m_ident);
-    
-    if (!scope)
-        return m_ident.isEmpty()
-            ? emitThrowError(generator, SyntaxError, "Invalid break statement.")
-            : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
-
-    generator.emitJumpScopes(scope->breakTarget(), scope->scopeDepth());
-    return dst;
-}
-
-// ------------------------------ ReturnNode -----------------------------------
-
-RegisterID* ReturnNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    if (generator.codeType() != FunctionCode)
-        return emitThrowError(generator, SyntaxError, "Invalid return statement.");
-
-    if (dst == generator.ignoredResult())
-        dst = 0;
-    RegisterID* r0 = m_value ? generator.emitNode(dst, m_value) : generator.emitLoad(dst, jsUndefined());
-    RefPtr<RegisterID> returnRegister;
-    if (generator.scopeDepth()) {
-        RefPtr<Label> l0 = generator.newLabel();
-        if (generator.hasFinaliser() && !r0->isTemporary()) {
-            returnRegister = generator.emitMove(generator.newTemporary(), r0);
-            r0 = returnRegister.get();
-        }
-        generator.emitJumpScopes(l0.get(), 0);
-        generator.emitLabel(l0.get());
-    }
-    generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine(), column());
-    return generator.emitReturn(r0);
-}
-
-// ------------------------------ WithNode -------------------------------------
-
-RegisterID* WithNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    
-    RefPtr<RegisterID> scope = generator.newTemporary();
-    generator.emitNode(scope.get(), m_expr); // scope must be protected until popped
-    generator.emitExpressionInfo(m_divot, m_expressionLength, 0);
-    generator.emitPushScope(scope.get());
-    RegisterID* result = generator.emitNode(dst, m_statement);
-    generator.emitPopScope();
-    return result;
-}
-
-// ------------------------------ CaseClauseNode --------------------------------
-
-inline void CaseClauseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (m_statements)
-        m_statements->emitBytecode(generator, dst);
-}
-
-// ------------------------------ CaseBlockNode --------------------------------
-
-enum SwitchKind { 
-    SwitchUnset = 0,
-    SwitchNumber = 1, 
-    SwitchString = 2, 
-    SwitchNeither = 3 
-};
-
-static void processClauseList(ClauseListNode* list, Vector<ExpressionNode*, 8>& literalVector, SwitchKind& typeForTable, bool& singleCharacterSwitch, int32_t& min_num, int32_t& max_num)
-{
-    for (; list; list = list->getNext()) {
-        ExpressionNode* clauseExpression = list->getClause()->expr();
-        literalVector.append(clauseExpression);
-        if (clauseExpression->isNumber()) {
-            double value = static_cast<NumberNode*>(clauseExpression)->value();
-            int32_t intVal = static_cast<int32_t>(value);
-            if ((typeForTable & ~SwitchNumber) || (intVal != value)) {
-                typeForTable = SwitchNeither;
-                break;
-            }
-            if (intVal < min_num)
-                min_num = intVal;
-            if (intVal > max_num)
-                max_num = intVal;
-            typeForTable = SwitchNumber;
-            continue;
-        }
-        if (clauseExpression->isString()) {
-            if (typeForTable & ~SwitchString) {
-                typeForTable = SwitchNeither;
-                break;
-            }
-            const UString& value = static_cast<StringNode*>(clauseExpression)->value().ustring();
-            if (singleCharacterSwitch &= value.size() == 1) {
-                int32_t intVal = value.rep()->data()[0];
-                if (intVal < min_num)
-                    min_num = intVal;
-                if (intVal > max_num)
-                    max_num = intVal;
-            }
-            typeForTable = SwitchString;
-            continue;
-        }
-        typeForTable = SwitchNeither;
-        break;        
-    }
-}
-    
-SwitchInfo::SwitchType CaseBlockNode::tryOptimizedSwitch(Vector<ExpressionNode*, 8>& literalVector, int32_t& min_num, int32_t& max_num)
-{
-    SwitchKind typeForTable = SwitchUnset;
-    bool singleCharacterSwitch = true;
-    
-    processClauseList(m_list1, literalVector, typeForTable, singleCharacterSwitch, min_num, max_num);
-    processClauseList(m_list2, literalVector, typeForTable, singleCharacterSwitch, min_num, max_num);
-    
-    if (typeForTable == SwitchUnset || typeForTable == SwitchNeither)
-        return SwitchInfo::SwitchNone;
-    
-    if (typeForTable == SwitchNumber) {
-        int32_t range = max_num - min_num;
-        if (min_num <= max_num && range <= 1000 && (range / literalVector.size()) < 10)
-            return SwitchInfo::SwitchImmediate;
-        return SwitchInfo::SwitchNone;
-    } 
-    
-    ASSERT(typeForTable == SwitchString);
-    
-    if (singleCharacterSwitch) {
-        int32_t range = max_num - min_num;
-        if (min_num <= max_num && range <= 1000 && (range / literalVector.size()) < 10)
-            return SwitchInfo::SwitchCharacter;
-    }
-
-    return SwitchInfo::SwitchString;
-}
-
-RegisterID* CaseBlockNode::emitBytecodeForBlock(BytecodeGenerator& generator, RegisterID* switchExpression, RegisterID* dst)
-{
-    RefPtr<Label> defaultLabel;
-    Vector<RefPtr<Label>, 8> labelVector;
-    Vector<ExpressionNode*, 8> literalVector;
-    int32_t min_num = std::numeric_limits<int32_t>::max();
-    int32_t max_num = std::numeric_limits<int32_t>::min();
-    SwitchInfo::SwitchType switchType = tryOptimizedSwitch(literalVector, min_num, max_num);
-
-    if (switchType != SwitchInfo::SwitchNone) {
-        // Prepare the various labels
-        for (uint32_t i = 0; i < literalVector.size(); i++)
-            labelVector.append(generator.newLabel());
-        defaultLabel = generator.newLabel();
-        generator.beginSwitch(switchExpression, switchType);
-    } else {
-        // Setup jumps
-        for (ClauseListNode* list = m_list1; list; list = list->getNext()) {
-            RefPtr<RegisterID> clauseVal = generator.newTemporary();
-            generator.emitNode(clauseVal.get(), list->getClause()->expr());
-            generator.emitBinaryOp(op_stricteq, clauseVal.get(), clauseVal.get(), switchExpression, OperandTypes());
-            labelVector.append(generator.newLabel());
-            generator.emitJumpIfTrue(clauseVal.get(), labelVector[labelVector.size() - 1].get());
-        }
-        
-        for (ClauseListNode* list = m_list2; list; list = list->getNext()) {
-            RefPtr<RegisterID> clauseVal = generator.newTemporary();
-            generator.emitNode(clauseVal.get(), list->getClause()->expr());
-            generator.emitBinaryOp(op_stricteq, clauseVal.get(), clauseVal.get(), switchExpression, OperandTypes());
-            labelVector.append(generator.newLabel());
-            generator.emitJumpIfTrue(clauseVal.get(), labelVector[labelVector.size() - 1].get());
-        }
-        defaultLabel = generator.newLabel();
-        generator.emitJump(defaultLabel.get());
-    }
-
-    RegisterID* result = 0;
-
-    size_t i = 0;
-    for (ClauseListNode* list = m_list1; list; list = list->getNext()) {
-        generator.emitLabel(labelVector[i++].get());
-        list->getClause()->emitBytecode(generator, dst);
-    }
-
-    if (m_defaultClause) {
-        generator.emitLabel(defaultLabel.get());
-        m_defaultClause->emitBytecode(generator, dst);
-    }
-
-    for (ClauseListNode* list = m_list2; list; list = list->getNext()) {
-        generator.emitLabel(labelVector[i++].get());
-        list->getClause()->emitBytecode(generator, dst);
-    }
-    if (!m_defaultClause)
-        generator.emitLabel(defaultLabel.get());
-
-    ASSERT(i == labelVector.size());
-    if (switchType != SwitchInfo::SwitchNone) {
-        ASSERT(labelVector.size() == literalVector.size());
-        generator.endSwitch(labelVector.size(), labelVector.data(), literalVector.data(), defaultLabel.get(), min_num, max_num);
-    }
-    return result;
-}
-
-// ------------------------------ SwitchNode -----------------------------------
-
-RegisterID* SwitchNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-    
-    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Switch);
-
-    RefPtr<RegisterID> r0 = generator.emitNode(m_expr);
-    RegisterID* r1 = m_block->emitBytecodeForBlock(generator, r0.get(), dst);
-
-    generator.emitLabel(scope->breakTarget());
-    return r1;
-}
-
-// ------------------------------ LabelNode ------------------------------------
-
-RegisterID* LabelNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-
-    if (generator.breakTarget(m_name))
-        return emitThrowError(generator, SyntaxError, "Duplicate label: %s.", m_name);
-
-    RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::NamedLabel, &m_name);
-    RegisterID* r0 = generator.emitNode(dst, m_statement);
-
-    generator.emitLabel(scope->breakTarget());
-    return r0;
-}
-
-// ------------------------------ ThrowNode ------------------------------------
-
-RegisterID* ThrowNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-
-    if (dst == generator.ignoredResult())
-        dst = 0;
-    RefPtr<RegisterID> expr = generator.emitNode(m_expr);
-    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
-    generator.emitThrow(expr.get());
-    return 0;
-}
-
-// ------------------------------ TryNode --------------------------------------
-
-RegisterID* TryNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    // NOTE: The catch and finally blocks must be labeled explicitly, so the
-    // optimizer knows they may be jumped to from anywhere.
-
-#ifndef QT_BUILD_SCRIPT_LIB
-    generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine(), column());
-#endif
-
-    RefPtr<Label> tryStartLabel = generator.newLabel();
-    RefPtr<Label> finallyStart;
-    RefPtr<RegisterID> finallyReturnAddr;
-    if (m_finallyBlock) {
-        finallyStart = generator.newLabel();
-        finallyReturnAddr = generator.newTemporary();
-        generator.pushFinallyContext(finallyStart.get(), finallyReturnAddr.get());
-    }
-
-    generator.emitLabel(tryStartLabel.get());
-    generator.emitNode(dst, m_tryBlock);
-
-    if (m_catchBlock) {
-        RefPtr<Label> catchEndLabel = generator.newLabel();
-        
-        // Normal path: jump over the catch block.
-        generator.emitJump(catchEndLabel.get());
-
-        // Uncaught exception path: the catch block.
-        RefPtr<Label> here = generator.emitLabel(generator.newLabel().get());
-        RefPtr<RegisterID> exceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), here.get());
-        if (m_catchHasEval) {
-            RefPtr<RegisterID> dynamicScopeObject = generator.emitNewObject(generator.newTemporary());
-            generator.emitPutById(dynamicScopeObject.get(), m_exceptionIdent, exceptionRegister.get());
-            generator.emitMove(exceptionRegister.get(), dynamicScopeObject.get());
-            generator.emitPushScope(exceptionRegister.get());
-        } else
-            generator.emitPushNewScope(exceptionRegister.get(), m_exceptionIdent, exceptionRegister.get());
-        generator.emitNode(dst, m_catchBlock);
-        generator.emitPopScope();
-        generator.emitLabel(catchEndLabel.get());
-    }
-
-    if (m_finallyBlock) {
-        generator.popFinallyContext();
-        // there may be important registers live at the time we jump
-        // to a finally block (such as for a return or throw) so we
-        // ref the highest register ever used as a conservative
-        // approach to not clobbering anything important
-        RefPtr<RegisterID> highestUsedRegister = generator.highestUsedRegister();
-        RefPtr<Label> finallyEndLabel = generator.newLabel();
-
-        // Normal path: invoke the finally block, then jump over it.
-        generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
-        generator.emitJump(finallyEndLabel.get());
-
-        // Uncaught exception path: invoke the finally block, then re-throw the exception.
-        RefPtr<Label> here = generator.emitLabel(generator.newLabel().get());
-        RefPtr<RegisterID> tempExceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), here.get());
-        generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
-        generator.emitThrow(tempExceptionRegister.get());
-
-        // The finally block.
-        generator.emitLabel(finallyStart.get());
-        generator.emitNode(dst, m_finallyBlock);
-        generator.emitSubroutineReturn(finallyReturnAddr.get());
-
-        generator.emitLabel(finallyEndLabel.get());
-    }
-
-    return dst;
-}
-
 // -----------------------------ScopeNodeData ---------------------------
 
 ScopeNodeData::ScopeNodeData(ParserArena& arena, SourceElements* statements, VarStack* varStack, FunctionStack* funcStack, int numConstants)
@@ -1910,12 +104,6 @@ ScopeNode::ScopeNode(JSGlobalData* globalData, const SourceCode& source, SourceE
 {
 }
 
-inline void ScopeNode::emitStatementsBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (m_data->m_statements)
-        m_data->m_statements->emitBytecode(generator, dst);
-}
-
 StatementNode* ScopeNode::singleStatement() const
 {
     return m_data->m_statements ? m_data->m_statements->singleStatement() : 0;
@@ -1939,19 +127,6 @@ PassRefPtr<ProgramNode> ProgramNode::create(JSGlobalData* globalData, SourceElem
     return node.release();
 }
 
-RegisterID* ProgramNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine(), column());
-
-    RefPtr<RegisterID> dstRegister = generator.newTemporary();
-    generator.emitLoad(dstRegister.get(), jsUndefined());
-    emitStatementsBytecode(generator, dstRegister.get());
-
-    generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine(), column());
-    generator.emitEnd(dstRegister.get());
-    return 0;
-}
-
 // ------------------------------ EvalNode -----------------------------
 
 inline EvalNode::EvalNode(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& source, CodeFeatures features, int numConstants)
@@ -1970,19 +145,6 @@ PassRefPtr<EvalNode> EvalNode::create(JSGlobalData* globalData, SourceElements*
     return node.release();
 }
 
-RegisterID* EvalNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine(), column());
-
-    RefPtr<RegisterID> dstRegister = generator.newTemporary();
-    generator.emitLoad(dstRegister.get(), jsUndefined());
-    emitStatementsBytecode(generator, dstRegister.get());
-
-    generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine(), column());
-    generator.emitEnd(dstRegister.get());
-    return 0;
-}
-
 // ------------------------------ FunctionBodyNode -----------------------------
 
 FunctionParameters::FunctionParameters(ParameterNode* firstParameter)
@@ -2001,10 +163,6 @@ inline FunctionBodyNode::FunctionBodyNode(JSGlobalData* globalData, SourceElemen
 {
 }
 
-FunctionBodyNode::~FunctionBodyNode()
-{
-}
-
 void FunctionBodyNode::finishParsing(const SourceCode& source, ParameterNode* firstParameter, const Identifier& ident)
 {
     setSource(source);
@@ -2034,37 +192,4 @@ PassRefPtr<FunctionBodyNode> FunctionBodyNode::create(JSGlobalData* globalData,
     return node.release();
 }
 
-RegisterID* FunctionBodyNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
-    generator.emitDebugHook(DidEnterCallFrame, firstLine(), lastLine(), column());
-    emitStatementsBytecode(generator, generator.ignoredResult());
-    StatementNode* singleStatement = this->singleStatement();
-    if (singleStatement && singleStatement->isBlock()) {
-        StatementNode* lastStatementInBlock = static_cast<BlockNode*>(singleStatement)->lastStatement();
-        if (lastStatementInBlock && lastStatementInBlock->isReturnNode())
-            return 0;
-    }
-
-    RegisterID* r0 = generator.emitLoad(0, jsUndefined());
-    generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine(), column());
-    generator.emitReturn(r0);
-    return 0;
-}
-
-// ------------------------------ FuncDeclNode ---------------------------------
-
-RegisterID* FuncDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    if (dst == generator.ignoredResult())
-        dst = 0;
-    return dst;
-}
-
-// ------------------------------ FuncExprNode ---------------------------------
-
-RegisterID* FuncExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
-    return generator.emitNewFunctionExpression(generator.finalDestination(dst), this);
-}
-
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.h b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.h
index 2f8d850..c216ea8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Nodes.h
@@ -40,6 +40,7 @@ namespace JSC {
     class ArgumentListNode;
     class BytecodeGenerator;
     class FunctionBodyNode;
+    class Label;
     class PropertyListNode;
     class ReadModifyResolveNode;
     class RegisterID;
@@ -151,6 +152,9 @@ namespace JSC {
         virtual bool isCommaNode() const { return false; }
         virtual bool isSimpleArray() const { return false; }
         virtual bool isAdd() const { return false; }
+        virtual bool hasConditionContextCodegen() const { return false; }
+
+        virtual void emitBytecodeInConditionContext(BytecodeGenerator&, Label*, Label*, bool) { ASSERT_NOT_REACHED(); }
 
         virtual ExpressionNode* stripUnaryPlus() { return this; }
 
@@ -165,10 +169,9 @@ namespace JSC {
         StatementNode(JSGlobalData*);
 
     public:
-        void setLoc(int firstLine, int lastLine, int column);
+        void setLoc(int firstLine, int lastLine);
         int firstLine() const { return lineNo(); }
         int lastLine() const { return m_lastLine; }
-        int column() const { return m_column; }
 
         virtual bool isEmptyStatement() const { return false; }
         virtual bool isReturnNode() const { return false; }
@@ -178,7 +181,6 @@ namespace JSC {
 
     private:
         int m_lastLine;
-        int m_column;
     };
 
     class NullNode : public ExpressionNode {
@@ -759,6 +761,7 @@ namespace JSC {
 
     protected:
         ExpressionNode* expr() { return m_expr; }
+        const ExpressionNode* expr() const { return m_expr; }
 
     private:
         virtual RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0);
@@ -790,6 +793,9 @@ namespace JSC {
     class LogicalNotNode : public UnaryOpNode {
     public:
         LogicalNotNode(JSGlobalData*, ExpressionNode*);
+    private:
+        void emitBytecodeInConditionContext(BytecodeGenerator&, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue);
+        virtual bool hasConditionContextCodegen() const { return expr()->hasConditionContextCodegen(); }
     };
 
     class BinaryOpNode : public ExpressionNode {
@@ -954,6 +960,8 @@ namespace JSC {
 
     private:
         virtual RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0);
+        void emitBytecodeInConditionContext(BytecodeGenerator&, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue);
+        virtual bool hasConditionContextCodegen() const { return true; }
 
         ExpressionNode* m_expr1;
         ExpressionNode* m_expr2;
@@ -1460,8 +1468,6 @@ namespace JSC {
         static FunctionBodyNode* create(JSGlobalData*);
         static PassRefPtr<FunctionBodyNode> create(JSGlobalData*, SourceElements*, VarStack*, FunctionStack*, const SourceCode&, CodeFeatures, int numConstants);
 
-        virtual ~FunctionBodyNode();
-
         FunctionParameters* parameters() const { return m_parameters.get(); }
         size_t parameterCount() const { return m_parameters->size(); }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Parser.h b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Parser.h
index 7f20480..894f709 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/Parser.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/Parser.h
@@ -83,8 +83,7 @@ namespace JSC {
             source,
             m_features,
             m_numConstants);
-            int column = m_source->startOffset(); //is it good way to find column number?
-            result->setLoc(m_source->firstLine(), m_lastLine, column);
+            result->setLoc(m_source->firstLine(), m_lastLine);
         }
 
         m_arena.reset();
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h b/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h
index 2fd4fc1..eef8e93 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h
@@ -34,7 +34,7 @@ namespace JSC {
     class ParserArenaDeletable;
     class ParserArenaRefCounted;
 
-    class IdentifierArena {
+    class IdentifierArena : public FastAllocBase {
     public:
         ALWAYS_INLINE const Identifier& makeIdentifier(JSGlobalData*, const UChar* characters, size_t length);
         const Identifier& makeNumericIdentifier(JSGlobalData*, double number);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/SourceCode.h b/src/3rdparty/javascriptcore/JavaScriptCore/parser/SourceCode.h
index 305b804..bef8e78 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/SourceCode.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/SourceCode.h
@@ -37,7 +37,8 @@ namespace JSC {
     class SourceCode {
     public:
         SourceCode()
-            : m_startChar(0)
+            : m_provider(0)
+            , m_startChar(0)
             , m_endChar(0)
             , m_firstLine(0)
         {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/pcre/dftables b/src/3rdparty/javascriptcore/JavaScriptCore/pcre/dftables
index 1f0ea01..669b948 100755
--- a/src/3rdparty/javascriptcore/JavaScriptCore/pcre/dftables
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/pcre/dftables
@@ -269,4 +269,5 @@ sub readHeaderValues()
     
     eval $content;
     die "$@" if $@;
+    unlink $tempFile;
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre.pri b/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre.pri
index c33c67c..4f59e17 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre.pri
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre.pri
@@ -3,8 +3,6 @@ VPATH += $$PWD
 INCLUDEPATH += $$PWD $$OUTPUT_DIR/JavaScriptCore/tmp
 DEPENDPATH += $$PWD
 
-isEmpty(GENERATED_SOURCES_DIR):GENERATED_SOURCES_DIR = tmp
-
 SOURCES += \
     pcre_compile.cpp \
     pcre_exec.cpp \
@@ -12,24 +10,3 @@ SOURCES += \
     pcre_ucp_searchfuncs.cpp \
     pcre_xclass.cpp
 
-!CONFIG(QTDIR_build) {
-    defineTest(addExtraCompiler) {
-        QMAKE_EXTRA_COMPILERS += $$1
-        generated_files.depends += compiler_$${1}_make_all
-        export(QMAKE_EXTRA_COMPILERS)
-        export(generated_files.depends)
-        return(true)
-    }
-}
-
-# GENERATOR: "chartables.c": compile and execute the chartables generator (and add it to sources)
-win32-msvc*|wince*: PREPROCESSOR = "--preprocessor=\"$$QMAKE_CC /E\""
-DFTABLES = $$PWD/dftables
-ctgen.input = DFTABLES
-ctgen.output = $$GENERATED_SOURCES_DIR/chartables.c
-ctgen.commands = perl $$DFTABLES ${QMAKE_FILE_OUT} $$PREPROCESSOR
-ctgen.CONFIG += target_predeps no_link
-ctgen.variable_out = GENERATED_SOURCES
-ctgen.dependency_type = TYPE_C
-ctgen.clean = ${QMAKE_FILE_OUT} ${QMAKE_VAR_GENERATED_SOURCES_DIR}${QMAKE_FILE_BASE}
-addExtraCompiler(ctgen)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre_exec.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre_exec.cpp
index 16619d4..8ca2eb4 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre_exec.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/pcre/pcre_exec.cpp
@@ -2164,14 +2164,14 @@ void Histogram::add(const JSRegExp* re, double elapsedTime)
 
 HistogramTimeLogger::HistogramTimeLogger(const JSRegExp* re)
     : m_re(re)
-    , m_startTime(getCurrentUTCTimeWithMicroseconds())
+    , m_startTime(currentTimeMS())
 {
 }
 
 HistogramTimeLogger::~HistogramTimeLogger()
 {
     static Histogram histogram;
-    histogram.add(m_re, getCurrentUTCTimeWithMicroseconds() - m_startTime);
+    histogram.add(m_re, currentTimeMS() - m_startTime);
 }
 
 #endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/HeavyProfile.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/HeavyProfile.cpp
deleted file mode 100644
index e69de29..0000000
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/HeavyProfile.cpp
+++ /dev/null
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/HeavyProfile.h b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/HeavyProfile.h
deleted file mode 100644
index e69de29..0000000
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/HeavyProfile.h
+++ /dev/null
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileGenerator.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileGenerator.cpp
index dc68ecb..17d37d7 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileGenerator.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileGenerator.cpp
@@ -63,7 +63,7 @@ void ProfileGenerator::addParentForConsoleStart(ExecState* exec)
     JSValue function;
 
     exec->interpreter()->retrieveLastCaller(exec, lineNumber, sourceID, sourceURL, function);
-    m_currentNode = ProfileNode::create(Profiler::createCallIdentifier(&exec->globalData(), function ? function.toThisObject(exec) : 0, sourceURL, lineNumber), m_head.get(), m_head.get());
+    m_currentNode = ProfileNode::create(Profiler::createCallIdentifier(exec, function ? function.toThisObject(exec) : 0, sourceURL, lineNumber), m_head.get(), m_head.get());
     m_head->insertNode(m_currentNode.get());
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileNode.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileNode.cpp
index 19050aa..fb126b3 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileNode.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/ProfileNode.cpp
@@ -33,15 +33,17 @@
 #include <stdio.h>
 #include <wtf/DateMath.h>
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 #include <windows.h>
 #endif
 
+using namespace WTF;
+
 namespace JSC {
 
 static double getCount()
 {
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
     static LARGE_INTEGER frequency = {0};
     if (!frequency.QuadPart)
         QueryPerformanceFrequency(&frequency);
@@ -49,7 +51,7 @@ static double getCount()
     QueryPerformanceCounter(&counter);
     return static_cast<double>(counter.QuadPart) / frequency.QuadPart;
 #else
-    return WTF::getCurrentUTCTimeWithMicroseconds();
+    return currentTimeMS();
 #endif
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.cpp
index 6f72e08..fe8727a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.cpp
@@ -46,7 +46,7 @@ static const char* GlobalCodeExecution = "(program)";
 static const char* AnonymousFunction = "(anonymous function)";
 static unsigned ProfilesUID = 0;
 
-static CallIdentifier createCallIdentifierFromFunctionImp(JSGlobalData*, JSFunction*);
+static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSFunction*);
 
 Profiler* Profiler::s_sharedProfiler = 0;
 Profiler* Profiler::s_sharedEnabledProfilerReference = 0;
@@ -109,14 +109,14 @@ void Profiler::willExecute(ExecState* exec, JSValue function)
 {
     ASSERT(!m_currentProfiles.isEmpty());
 
-    dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(&exec->globalData(), function, "", 0), exec->lexicalGlobalObject()->profileGroup());
+    dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(exec, function, "", 0), exec->lexicalGlobalObject()->profileGroup());
 }
 
 void Profiler::willExecute(ExecState* exec, const UString& sourceURL, int startingLineNumber)
 {
     ASSERT(!m_currentProfiles.isEmpty());
 
-    CallIdentifier callIdentifier = createCallIdentifier(&exec->globalData(), JSValue(), sourceURL, startingLineNumber);
+    CallIdentifier callIdentifier = createCallIdentifier(exec, JSValue(), sourceURL, startingLineNumber);
 
     dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::willExecute, callIdentifier, exec->lexicalGlobalObject()->profileGroup());
 }
@@ -125,17 +125,17 @@ void Profiler::didExecute(ExecState* exec, JSValue function)
 {
     ASSERT(!m_currentProfiles.isEmpty());
 
-    dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(&exec->globalData(), function, "", 0), exec->lexicalGlobalObject()->profileGroup());
+    dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(exec, function, "", 0), exec->lexicalGlobalObject()->profileGroup());
 }
 
 void Profiler::didExecute(ExecState* exec, const UString& sourceURL, int startingLineNumber)
 {
     ASSERT(!m_currentProfiles.isEmpty());
 
-    dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(&exec->globalData(), JSValue(), sourceURL, startingLineNumber), exec->lexicalGlobalObject()->profileGroup());
+    dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(exec, JSValue(), sourceURL, startingLineNumber), exec->lexicalGlobalObject()->profileGroup());
 }
 
-CallIdentifier Profiler::createCallIdentifier(JSGlobalData* globalData, JSValue functionValue, const UString& defaultSourceURL, int defaultLineNumber)
+CallIdentifier Profiler::createCallIdentifier(ExecState* exec, JSValue functionValue, const UString& defaultSourceURL, int defaultLineNumber)
 {
     if (!functionValue)
         return CallIdentifier(GlobalCodeExecution, defaultSourceURL, defaultLineNumber);
@@ -144,17 +144,17 @@ CallIdentifier Profiler::createCallIdentifier(JSGlobalData* globalData, JSValue
     if (asObject(functionValue)->inherits(&JSFunction::info)) {
         JSFunction* function = asFunction(functionValue);
         if (!function->executable()->isHostFunction())
-            return createCallIdentifierFromFunctionImp(globalData, function);
+            return createCallIdentifierFromFunctionImp(exec, function);
     }
     if (asObject(functionValue)->inherits(&InternalFunction::info))
-        return CallIdentifier(static_cast<InternalFunction*>(asObject(functionValue))->name(globalData), defaultSourceURL, defaultLineNumber);
-    return CallIdentifier("(" + asObject(functionValue)->className() + " object)", defaultSourceURL, defaultLineNumber);
+        return CallIdentifier(static_cast<InternalFunction*>(asObject(functionValue))->name(exec), defaultSourceURL, defaultLineNumber);
+    return CallIdentifier(makeString("(", asObject(functionValue)->className(), " object)"), defaultSourceURL, defaultLineNumber);
 }
 
-CallIdentifier createCallIdentifierFromFunctionImp(JSGlobalData* globalData, JSFunction* function)
+CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSFunction* function)
 {
     ASSERT(!function->isHostFunction());
-    const UString& name = function->calculatedDisplayName(globalData);
+    const UString& name = function->calculatedDisplayName(exec);
     return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, function->jsExecutable()->sourceURL(), function->jsExecutable()->lineNo());
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.h b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.h
index 21621bf..4b8b4a0 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.h
@@ -52,7 +52,7 @@ namespace JSC {
         }
 
         static Profiler* profiler(); 
-        static CallIdentifier createCallIdentifier(JSGlobalData*, JSValue, const UString& sourceURL, int lineNumber);
+        static CallIdentifier createCallIdentifier(ExecState* exec, JSValue, const UString& sourceURL, int lineNumber);
 
         void startProfiling(ExecState*, const UString& title);
         PassRefPtr<Profile> stopProfiling(ExecState*, const UString& title);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/TreeProfile.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/TreeProfile.cpp
deleted file mode 100644
index e69de29..0000000
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/TreeProfile.cpp
+++ /dev/null
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/TreeProfile.h b/src/3rdparty/javascriptcore/JavaScriptCore/profiler/TreeProfile.h
deleted file mode 100644
index e69de29..0000000
--- a/src/3rdparty/javascriptcore/JavaScriptCore/profiler/TreeProfile.h
+++ /dev/null
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArgList.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArgList.h
index 3227770..8e1fdbe 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArgList.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArgList.h
@@ -104,7 +104,11 @@ namespace JSC {
         void append(JSValue v)
         {
             ASSERT(!m_isReadOnly);
-            
+
+#if ENABLE(JSC_ZOMBIES)
+            ASSERT(!v.isZombie());
+#endif
+
             if (m_isUsingInlineBuffer && m_size < inlineCapacity) {
                 m_vector.uncheckedAppend(v);
                 ++m_size;
@@ -187,6 +191,10 @@ namespace JSC {
             : m_args(args)
             , m_argCount(argCount)
         {
+#if ENABLE(JSC_ZOMBIES)
+            for (size_t i = 0; i < argCount; i++)
+                ASSERT(!m_args[i].isZombie());
+#endif
         }
         
         ArgList(Register* args, int argCount)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.cpp
index d90ea15..bb30e3b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.cpp
@@ -204,6 +204,19 @@ bool Arguments::getOwnPropertyDescriptor(ExecState* exec, const Identifier& prop
     return JSObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
 }
 
+void Arguments::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
+{
+    if (mode == IncludeDontEnumProperties) {
+        for (unsigned i = 0; i < d->numArguments; ++i) {
+            if (!d->deletedArguments || !d->deletedArguments[i])
+                propertyNames.add(Identifier(exec, UString::from(i)));
+        }
+        propertyNames.add(exec->propertyNames().callee);
+        propertyNames.add(exec->propertyNames().length);
+    }
+    JSObject::getOwnPropertyNames(exec, propertyNames, mode);
+}
+
 void Arguments::put(ExecState* exec, unsigned i, JSValue value, PutPropertySlot& slot)
 {
     if (i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
@@ -244,7 +257,7 @@ void Arguments::put(ExecState* exec, const Identifier& propertyName, JSValue val
     JSObject::put(exec, propertyName, value, slot);
 }
 
-bool Arguments::deleteProperty(ExecState* exec, unsigned i, bool checkDontDelete)
+bool Arguments::deleteProperty(ExecState* exec, unsigned i) 
 {
     if (i < d->numArguments) {
         if (!d->deletedArguments) {
@@ -257,10 +270,10 @@ bool Arguments::deleteProperty(ExecState* exec, unsigned i, bool checkDontDelete
         }
     }
 
-    return JSObject::deleteProperty(exec, Identifier(exec, UString::from(i)), checkDontDelete);
+    return JSObject::deleteProperty(exec, Identifier(exec, UString::from(i)));
 }
 
-bool Arguments::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool Arguments::deleteProperty(ExecState* exec, const Identifier& propertyName) 
 {
     bool isArrayIndex;
     unsigned i = propertyName.toArrayIndex(&isArrayIndex);
@@ -285,17 +298,7 @@ bool Arguments::deleteProperty(ExecState* exec, const Identifier& propertyName,
         return true;
     }
 
-    return JSObject::deleteProperty(exec, propertyName, checkDontDelete);
-}
-
-bool Arguments::getPropertyAttributes(ExecState* exec, const Identifier& propertyName, unsigned& attributes) const
-{
-    if ((propertyName == exec->propertyNames().length)
-        || (propertyName == exec->propertyNames().callee)) {
-        attributes = DontEnum;
-        return true;
-    }
-    return JSObject::getPropertyAttributes(exec, propertyName, attributes);
+    return JSObject::deleteProperty(exec, propertyName);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.h
index 2aa0921..d4a8c95 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Arguments.h
@@ -85,19 +85,22 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype) 
         { 
-            return Structure::create(prototype, TypeInfo(ObjectType)); 
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags)); 
         }
 
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags;
+
     private:
         void getArgumentsData(CallFrame*, JSObject*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
         virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
         virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
         virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
         virtual void put(ExecState*, unsigned propertyName, JSValue, PutPropertySlot&);
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
-        virtual bool deleteProperty(ExecState*, unsigned propertyName, bool checkDontDelete = true);
-        virtual bool getPropertyAttributes(ExecState*, const Identifier& propertyName, unsigned& attributes) const;
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+        virtual bool deleteProperty(ExecState*, unsigned propertyName);
 
         virtual const ClassInfo* classInfo() const { return &info; }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.cpp
index c60cb0e..fb44494 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.cpp
@@ -37,7 +37,7 @@ ASSERT_CLASS_FITS_IN_CELL(ArrayConstructor);
     
 static JSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState*, JSObject*, JSValue, const ArgList&);
 
-ArrayConstructor::ArrayConstructor(ExecState* exec, PassRefPtr<Structure> structure, ArrayPrototype* arrayPrototype, Structure* prototypeFunctionStructure)
+ArrayConstructor::ArrayConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, ArrayPrototype* arrayPrototype, Structure* prototypeFunctionStructure)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, arrayPrototype->classInfo()->className))
 {
     // ECMA 15.4.3.1 Array.prototype
@@ -50,7 +50,7 @@ ArrayConstructor::ArrayConstructor(ExecState* exec, PassRefPtr<Structure> struct
     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().isArray, arrayConstructorIsArray), DontEnum);
 }
 
-static JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args)
+static inline JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args)
 {
     // a single numeric argument denotes the array size (!)
     if (args.size() == 1 && args.at(0).isNumber()) {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.h
index 2b79510..6d25400 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayConstructor.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class ArrayConstructor : public InternalFunction {
     public:
-        ArrayConstructor(ExecState*, PassRefPtr<Structure>, ArrayPrototype*, Structure*);
+        ArrayConstructor(ExecState*, NonNullPassRefPtr<Structure>, ArrayPrototype*, Structure*);
 
         virtual ConstructType getConstructData(ConstructData&);
         virtual CallType getCallData(CallData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.cpp
index c453b22..ce814b2 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.cpp
@@ -115,7 +115,7 @@ const ClassInfo ArrayPrototype::info = {"Array", &JSArray::info, 0, ExecState::a
 */
 
 // ECMA 15.4.4
-ArrayPrototype::ArrayPrototype(PassRefPtr<Structure> structure)
+ArrayPrototype::ArrayPrototype(NonNullPassRefPtr<Structure> structure)
     : JSArray(structure)
 {
 }
@@ -204,8 +204,7 @@ JSValue JSC_HOST_CALL arrayProtoFuncToString(ExecState* exec, JSObject*, JSValue
             buffer.append(rep->data(), rep->size());
     }
     ASSERT(buffer.size() == totalSize);
-    unsigned finalSize = buffer.size();
-    return jsString(exec, UString(buffer.releaseBuffer(), finalSize, false));
+    return jsString(exec, UString::adopt(buffer));
 }
 
 JSValue JSC_HOST_CALL arrayProtoFuncToLocaleString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -745,8 +744,8 @@ JSValue JSC_HOST_CALL arrayProtoFuncEvery(ExecState* exec, JSObject*, JSValue th
             cachedCall.setArgument(0, array->getIndex(k));
             cachedCall.setArgument(1, jsNumber(exec, k));
             cachedCall.setArgument(2, thisObj);
-            
-            if (!cachedCall.call().toBoolean(exec))
+            JSValue result = cachedCall.call();
+            if (!result.toBoolean(cachedCall.newCallFrame(exec)))
                 return jsBoolean(false);
         }
     }
@@ -846,8 +845,8 @@ JSValue JSC_HOST_CALL arrayProtoFuncSome(ExecState* exec, JSObject*, JSValue thi
             cachedCall.setArgument(0, array->getIndex(k));
             cachedCall.setArgument(1, jsNumber(exec, k));
             cachedCall.setArgument(2, thisObj);
-            
-            if (cachedCall.call().toBoolean(exec))
+            JSValue result = cachedCall.call();
+            if (result.toBoolean(cachedCall.newCallFrame(exec)))
                 return jsBoolean(true);
         }
     }
@@ -1034,7 +1033,7 @@ JSValue JSC_HOST_CALL arrayProtoFuncIndexOf(ExecState* exec, JSObject*, JSValue
         JSValue e = getProperty(exec, thisObj, index);
         if (!e)
             continue;
-        if (JSValue::strictEqual(searchElement, e))
+        if (JSValue::strictEqual(exec, searchElement, e))
             return jsNumber(exec, index);
     }
 
@@ -1065,7 +1064,7 @@ JSValue JSC_HOST_CALL arrayProtoFuncLastIndexOf(ExecState* exec, JSObject*, JSVa
         JSValue e = getProperty(exec, thisObj, index);
         if (!e)
             continue;
-        if (JSValue::strictEqual(searchElement, e))
+        if (JSValue::strictEqual(exec, searchElement, e))
             return jsNumber(exec, index);
     }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.h
index 6f7ed12..e52914c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ArrayPrototype.h
@@ -28,7 +28,7 @@ namespace JSC {
 
     class ArrayPrototype : public JSArray {
     public:
-        explicit ArrayPrototype(PassRefPtr<Structure>);
+        explicit ArrayPrototype(NonNullPassRefPtr<Structure>);
 
         bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BatchedTransitionOptimizer.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BatchedTransitionOptimizer.h
index 929a5e7..74089a5 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BatchedTransitionOptimizer.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BatchedTransitionOptimizer.h
@@ -43,7 +43,7 @@ namespace JSC {
 
         ~BatchedTransitionOptimizer()
         {
-            m_object->setStructure(Structure::fromDictionaryTransition(m_object->structure()));
+            m_object->flattenDictionaryObject();
         }
 
     private:
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.cpp
index 9fcba37..b0d8df3 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.cpp
@@ -28,7 +28,7 @@ namespace JSC {
 
 ASSERT_CLASS_FITS_IN_CELL(BooleanConstructor);
 
-BooleanConstructor::BooleanConstructor(ExecState* exec, PassRefPtr<Structure> structure, BooleanPrototype* booleanPrototype)
+BooleanConstructor::BooleanConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, BooleanPrototype* booleanPrototype)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, booleanPrototype->classInfo()->className))
 {
     putDirectWithoutTransition(exec->propertyNames().prototype, booleanPrototype, DontEnum | DontDelete | ReadOnly);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.h
index d9f51ab..1d8a26a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanConstructor.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class BooleanConstructor : public InternalFunction {
     public:
-        BooleanConstructor(ExecState*, PassRefPtr<Structure>, BooleanPrototype*);
+        BooleanConstructor(ExecState*, NonNullPassRefPtr<Structure>, BooleanPrototype*);
 
     private:
         virtual ConstructType getConstructData(ConstructData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.cpp
index 01f695a..c9b3846 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.cpp
@@ -27,7 +27,7 @@ ASSERT_CLASS_FITS_IN_CELL(BooleanObject);
 
 const ClassInfo BooleanObject::info = { "Boolean", 0, 0, 0 };
 
-BooleanObject::BooleanObject(PassRefPtr<Structure> structure)
+BooleanObject::BooleanObject(NonNullPassRefPtr<Structure> structure)
     : JSWrapperObject(structure)
 {
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.h
index 5f3e5f0..69c2e51 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanObject.h
@@ -27,14 +27,14 @@ namespace JSC {
 
     class BooleanObject : public JSWrapperObject {
     public:
-        explicit BooleanObject(PassRefPtr<Structure>);
+        explicit BooleanObject(NonNullPassRefPtr<Structure>);
 
         virtual const ClassInfo* classInfo() const { return &info; }
         static const ClassInfo info;
         
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultMark | HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
     };
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.cpp
index cf4fbd7..8d338f9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.cpp
@@ -37,7 +37,7 @@ static JSValue JSC_HOST_CALL booleanProtoFuncValueOf(ExecState*, JSObject*, JSVa
 
 // ECMA 15.6.4
 
-BooleanPrototype::BooleanPrototype(ExecState* exec, PassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
+BooleanPrototype::BooleanPrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
     : BooleanObject(structure)
 {
     setInternalValue(jsBoolean(false));
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.h
index 16f80b5..cc69b3f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/BooleanPrototype.h
@@ -27,7 +27,7 @@ namespace JSC {
 
     class BooleanPrototype : public BooleanObject {
     public:
-        BooleanPrototype(ExecState*, PassRefPtr<Structure>, Structure* prototypeFunctionStructure);
+        BooleanPrototype(ExecState*, NonNullPassRefPtr<Structure>, Structure* prototypeFunctionStructure);
     };
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.h
index ef4988b..32e1e52 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.h
@@ -60,12 +60,12 @@ namespace JSC {
         }
         inline operator NativeFunction() const {return ptr;}
         inline operator bool() const {return ptr;}
-       
+
         JSValue operator()(ExecState* exec, JSObject* jsobj, JSValue thisValue, const ArgList& argList) const;
     };
 #endif
 
-#if defined(QT_BUILD_SCRIPT_LIB) && PLATFORM(SOLARIS)
+#if defined(QT_BUILD_SCRIPT_LIB) && OS(SOLARIS)
     struct
 #else
     union
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp
index abe15c8..29df7a5 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp
@@ -32,6 +32,7 @@
 #include "JSONObject.h"
 #include "JSString.h"
 #include "JSValue.h"
+#include "JSZombie.h"
 #include "MarkStack.h"
 #include "Nodes.h"
 #include "Tracing.h"
@@ -44,7 +45,7 @@
 #include <wtf/UnusedParam.h>
 #include <wtf/VMTags.h>
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 
 #include <mach/mach_init.h>
 #include <mach/mach_port.h>
@@ -52,29 +53,29 @@
 #include <mach/thread_act.h>
 #include <mach/vm_map.h>
 
-#elif PLATFORM(SYMBIAN)
+#elif OS(SYMBIAN)
 #include <e32std.h>
 #include <e32cmn.h>
 #include <unistd.h>
 
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
 
 #include <windows.h>
 #include <malloc.h>
 
-#elif PLATFORM(HAIKU)
+#elif OS(HAIKU)
 
 #include <OS.h>
 
-#elif PLATFORM(UNIX)
+#elif OS(UNIX)
 
 #include <stdlib.h>
-#if !PLATFORM(HAIKU)
+#if !OS(HAIKU)
 #include <sys/mman.h>
 #endif
 #include <unistd.h>
 
-#if PLATFORM(SOLARIS)
+#if OS(SOLARIS)
 #include <thread.h>
 #else
 #include <pthread.h>
@@ -84,7 +85,7 @@
 #include <pthread_np.h>
 #endif
 
-#if PLATFORM(QNX)
+#if OS(QNX)
 #include <fcntl.h>
 #include <sys/procfs.h>
 #include <stdio.h>
@@ -103,26 +104,22 @@ namespace JSC {
 
 const size_t GROWTH_FACTOR = 2;
 const size_t LOW_WATER_FACTOR = 4;
-const size_t ALLOCATIONS_PER_COLLECTION = 4000;
+const size_t ALLOCATIONS_PER_COLLECTION = 3600;
 // This value has to be a macro to be used in max() without introducing
 // a PIC branch in Mach-O binaries, see <rdar://problem/5971391>.
 #define MIN_ARRAY_SIZE (static_cast<size_t>(14))
 
-#if PLATFORM(SYMBIAN)
+#if OS(SYMBIAN)
 const size_t MAX_NUM_BLOCKS = 256; // Max size of collector heap set to 16 MB
 static RHeap* userChunk = 0;
 #endif
 
 #if ENABLE(JSC_MULTIPLE_THREADS)
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 typedef mach_port_t PlatformThread;
-#elif PLATFORM(WIN_OS)
-struct PlatformThread {
-    PlatformThread(DWORD _id, HANDLE _handle) : id(_id), handle(_handle) {}
-    DWORD id;
-    HANDLE handle;
-};
+#elif OS(WINDOWS)
+typedef HANDLE PlatformThread;
 #endif
 
 class Heap::Thread {
@@ -151,8 +148,8 @@ Heap::Heap(JSGlobalData* globalData)
     , m_globalData(globalData)
 {
     ASSERT(globalData);
-
-#if PLATFORM(SYMBIAN)
+    
+#if OS(SYMBIAN)
     // Symbian OpenC supports mmap but currently not the MAP_ANON flag.
     // Using fastMalloc() does not properly align blocks on 64k boundaries
     // and previous implementation was flawed/incomplete.
@@ -170,10 +167,10 @@ Heap::Heap(JSGlobalData* globalData)
         if (!userChunk)
             CRASH();
     }
-#endif // PLATFORM(SYMBIAN)
+#endif // OS(SYMBIAN)
     
-    memset(&primaryHeap, 0, sizeof(CollectorHeap));
-    memset(&numberHeap, 0, sizeof(CollectorHeap));
+    memset(&m_heap, 0, sizeof(CollectorHeap));
+    allocateBlock();
 }
 
 Heap::~Heap()
@@ -189,6 +186,9 @@ void Heap::destroy()
     if (!m_globalData)
         return;
 
+    ASSERT(!m_globalData->dynamicGlobalObject);
+    ASSERT(!isBusy());
+    
     // The global object is not GC protected at this point, so sweeping may delete it
     // (and thus the global data) before other objects that may use the global data.
     RefPtr<JSGlobalData> protect(m_globalData);
@@ -196,13 +196,7 @@ void Heap::destroy()
     delete m_markListSet;
     m_markListSet = 0;
 
-    sweep<PrimaryHeap>();
-    // No need to sweep number heap, because the JSNumber destructor doesn't do anything.
-
-    ASSERT(!primaryHeap.numLiveObjects);
-
-    freeBlocks(&primaryHeap);
-    freeBlocks(&numberHeap);
+    freeBlocks();
 
 #if ENABLE(JSC_MULTIPLE_THREADS)
     if (m_currentThreadRegistrar) {
@@ -221,27 +215,23 @@ void Heap::destroy()
     m_globalData = 0;
 }
 
-template <HeapType heapType>
 NEVER_INLINE CollectorBlock* Heap::allocateBlock()
 {
     // Disable the use of vm_map for the Qt build on Darwin, because when compiled on 10.4
     // it crashes on 10.5
-#if PLATFORM(DARWIN) && !PLATFORM(QT)
+#if OS(DARWIN) && !PLATFORM(QT)
     vm_address_t address = 0;
-    // FIXME: tag the region as a JavaScriptCore heap when we get a registered VM tag: <rdar://problem/6054788>.
     vm_map(current_task(), &address, BLOCK_SIZE, BLOCK_OFFSET_MASK, VM_FLAGS_ANYWHERE | VM_TAG_FOR_COLLECTOR_MEMORY, MEMORY_OBJECT_NULL, 0, FALSE, VM_PROT_DEFAULT, VM_PROT_DEFAULT, VM_INHERIT_DEFAULT);
-#elif PLATFORM(SYMBIAN)
+#elif OS(SYMBIAN)
     // Allocate a 64 kb aligned CollectorBlock
     unsigned char* mask = reinterpret_cast<unsigned char*>(userChunk->Alloc(BLOCK_SIZE));
     if (!mask)
         CRASH();
     uintptr_t address = reinterpret_cast<uintptr_t>(mask);
-
-    memset(reinterpret_cast<void*>(address), 0, BLOCK_SIZE);
-#elif PLATFORM(WINCE)
+#elif OS(WINCE)
     void* address = VirtualAlloc(NULL, BLOCK_SIZE, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
-#elif PLATFORM(WIN_OS)
-#if COMPILER(MINGW) && !PLATFORM(X86_64)
+#elif OS(WINDOWS)
+#if COMPILER(MINGW) && !CPU(X86_64)
     void* address = __mingw_aligned_malloc(BLOCK_SIZE, BLOCK_SIZE);
 #else
     void* address = _aligned_malloc(BLOCK_SIZE, BLOCK_SIZE);
@@ -250,7 +240,6 @@ NEVER_INLINE CollectorBlock* Heap::allocateBlock()
 #elif HAVE(POSIX_MEMALIGN)
     void* address;
     posix_memalign(&address, BLOCK_SIZE, BLOCK_SIZE);
-    memset(address, 0, BLOCK_SIZE);
 #else
 
 #if ENABLE(JSC_MULTIPLE_THREADS)
@@ -276,58 +265,66 @@ NEVER_INLINE CollectorBlock* Heap::allocateBlock()
         munmap(reinterpret_cast<char*>(address + adjust + BLOCK_SIZE), extra - adjust);
 
     address += adjust;
-    memset(reinterpret_cast<void*>(address), 0, BLOCK_SIZE);
 #endif
 
+    // Initialize block.
+
     CollectorBlock* block = reinterpret_cast<CollectorBlock*>(address);
-    block->freeList = block->cells;
     block->heap = this;
-    block->type = heapType;
+    clearMarkBits(block);
 
-    CollectorHeap& heap = heapType == PrimaryHeap ? primaryHeap : numberHeap;
-    size_t numBlocks = heap.numBlocks;
-    if (heap.usedBlocks == numBlocks) {
+    Structure* dummyMarkableCellStructure = m_globalData->dummyMarkableCellStructure.get();
+    for (size_t i = 0; i < HeapConstants::cellsPerBlock; ++i)
+        new (block->cells + i) JSCell(dummyMarkableCellStructure);
+    
+    // Add block to blocks vector.
+
+    size_t numBlocks = m_heap.numBlocks;
+    if (m_heap.usedBlocks == numBlocks) {
         static const size_t maxNumBlocks = ULONG_MAX / sizeof(CollectorBlock*) / GROWTH_FACTOR;
         if (numBlocks > maxNumBlocks)
             CRASH();
         numBlocks = max(MIN_ARRAY_SIZE, numBlocks * GROWTH_FACTOR);
-        heap.numBlocks = numBlocks;
-        heap.blocks = static_cast<CollectorBlock**>(fastRealloc(heap.blocks, numBlocks * sizeof(CollectorBlock*)));
+        m_heap.numBlocks = numBlocks;
+        m_heap.blocks = static_cast<CollectorBlock**>(fastRealloc(m_heap.blocks, numBlocks * sizeof(CollectorBlock*)));
     }
-    heap.blocks[heap.usedBlocks++] = block;
+    m_heap.blocks[m_heap.usedBlocks++] = block;
 
     return block;
 }
 
-template <HeapType heapType>
 NEVER_INLINE void Heap::freeBlock(size_t block)
 {
-    CollectorHeap& heap = heapType == PrimaryHeap ? primaryHeap : numberHeap;
+    m_heap.didShrink = true;
 
-    freeBlock(heap.blocks[block]);
+    ObjectIterator it(m_heap, block);
+    ObjectIterator end(m_heap, block + 1);
+    for ( ; it != end; ++it)
+        (*it)->~JSCell();
+    freeBlockPtr(m_heap.blocks[block]);
 
     // swap with the last block so we compact as we go
-    heap.blocks[block] = heap.blocks[heap.usedBlocks - 1];
-    heap.usedBlocks--;
+    m_heap.blocks[block] = m_heap.blocks[m_heap.usedBlocks - 1];
+    m_heap.usedBlocks--;
 
-    if (heap.numBlocks > MIN_ARRAY_SIZE && heap.usedBlocks < heap.numBlocks / LOW_WATER_FACTOR) {
-        heap.numBlocks = heap.numBlocks / GROWTH_FACTOR; 
-        heap.blocks = static_cast<CollectorBlock**>(fastRealloc(heap.blocks, heap.numBlocks * sizeof(CollectorBlock*)));
+    if (m_heap.numBlocks > MIN_ARRAY_SIZE && m_heap.usedBlocks < m_heap.numBlocks / LOW_WATER_FACTOR) {
+        m_heap.numBlocks = m_heap.numBlocks / GROWTH_FACTOR; 
+        m_heap.blocks = static_cast<CollectorBlock**>(fastRealloc(m_heap.blocks, m_heap.numBlocks * sizeof(CollectorBlock*)));
     }
 }
 
-NEVER_INLINE void Heap::freeBlock(CollectorBlock* block)
+NEVER_INLINE void Heap::freeBlockPtr(CollectorBlock* block)
 {
     // Disable the use of vm_deallocate for the Qt build on Darwin, because when compiled on 10.4
     // it crashes on 10.5
-#if PLATFORM(DARWIN) && !PLATFORM(QT)
+#if OS(DARWIN) && !PLATFORM(QT)
     vm_deallocate(current_task(), reinterpret_cast<vm_address_t>(block), BLOCK_SIZE);
-#elif PLATFORM(SYMBIAN)
+#elif OS(SYMBIAN)
     userChunk->Free(reinterpret_cast<TAny*>(block));
-#elif PLATFORM(WINCE)
+#elif OS(WINCE)
     VirtualFree(block, 0, MEM_RELEASE);
-#elif PLATFORM(WIN_OS)
-#if COMPILER(MINGW) && !PLATFORM(X86_64)
+#elif OS(WINDOWS)
+#if COMPILER(MINGW) && !CPU(X86_64)
     __mingw_aligned_free(block);
 #else
     _aligned_free(block);
@@ -339,13 +336,34 @@ NEVER_INLINE void Heap::freeBlock(CollectorBlock* block)
 #endif
 }
 
-void Heap::freeBlocks(CollectorHeap* heap)
+void Heap::freeBlocks()
 {
-    for (size_t i = 0; i < heap->usedBlocks; ++i)
-        if (heap->blocks[i])
-            freeBlock(heap->blocks[i]);
-    fastFree(heap->blocks);
-    memset(heap, 0, sizeof(CollectorHeap));
+    ProtectCountSet protectedValuesCopy = m_protectedValues;
+
+    clearMarkBits();
+    ProtectCountSet::iterator protectedValuesEnd = protectedValuesCopy.end();
+    for (ProtectCountSet::iterator it = protectedValuesCopy.begin(); it != protectedValuesEnd; ++it)
+        markCell(it->first);
+
+    m_heap.nextCell = 0;
+    m_heap.nextBlock = 0;
+    DeadObjectIterator it(m_heap, m_heap.nextBlock, m_heap.nextCell);
+    DeadObjectIterator end(m_heap, m_heap.usedBlocks);
+    for ( ; it != end; ++it)
+        (*it)->~JSCell();
+
+    ASSERT(!protectedObjectCount());
+
+    protectedValuesEnd = protectedValuesCopy.end();
+    for (ProtectCountSet::iterator it = protectedValuesCopy.begin(); it != protectedValuesEnd; ++it)
+        it->first->~JSCell();
+
+    for (size_t block = 0; block < m_heap.usedBlocks; ++block)
+        freeBlockPtr(m_heap.blocks[block]);
+
+    fastFree(m_heap.blocks);
+
+    memset(&m_heap, 0, sizeof(CollectorHeap));
 }
 
 void Heap::recordExtraCost(size_t cost)
@@ -360,123 +378,109 @@ void Heap::recordExtraCost(size_t cost)
     // are either very short lived temporaries, or have extremely long lifetimes. So
     // if a large value survives one garbage collection, there is not much point to
     // collecting more frequently as long as it stays alive.
-    // NOTE: we target the primaryHeap unconditionally as JSNumber doesn't modify cost 
 
-    primaryHeap.extraCost += cost;
+    if (m_heap.extraCost > maxExtraCost && m_heap.extraCost > m_heap.usedBlocks * BLOCK_SIZE / 2) {
+        // If the last iteration through the heap deallocated blocks, we need
+        // to clean up remaining garbage before marking. Otherwise, the conservative
+        // marking mechanism might follow a pointer to unmapped memory.
+        if (m_heap.didShrink)
+            sweep();
+        reset();
+    }
+    m_heap.extraCost += cost;
 }
 
-template <HeapType heapType> ALWAYS_INLINE void* Heap::heapAllocate(size_t s)
+void* Heap::allocate(size_t s)
 {
-    typedef typename HeapConstants<heapType>::Block Block;
-    typedef typename HeapConstants<heapType>::Cell Cell;
-
-    CollectorHeap& heap = heapType == PrimaryHeap ? primaryHeap : numberHeap;
+    typedef HeapConstants::Block Block;
+    typedef HeapConstants::Cell Cell;
+    
     ASSERT(JSLock::lockCount() > 0);
     ASSERT(JSLock::currentThreadIsHoldingLock());
-    ASSERT_UNUSED(s, s <= HeapConstants<heapType>::cellSize);
+    ASSERT_UNUSED(s, s <= HeapConstants::cellSize);
 
-    ASSERT(heap.operationInProgress == NoOperation);
-    ASSERT(heapType == PrimaryHeap || heap.extraCost == 0);
-    // FIXME: If another global variable access here doesn't hurt performance
-    // too much, we could CRASH() in NDEBUG builds, which could help ensure we
-    // don't spend any time debugging cases where we allocate inside an object's
-    // deallocation code.
+    ASSERT(m_heap.operationInProgress == NoOperation);
 
 #if COLLECT_ON_EVERY_ALLOCATION
-    collect();
+    collectAllGarbage();
+    ASSERT(m_heap.operationInProgress == NoOperation);
 #endif
 
-    size_t numLiveObjects = heap.numLiveObjects;
-    size_t usedBlocks = heap.usedBlocks;
-    size_t i = heap.firstBlockWithPossibleSpace;
-
-    // if we have a huge amount of extra cost, we'll try to collect even if we still have
-    // free cells left.
-    if (heapType == PrimaryHeap && heap.extraCost > ALLOCATIONS_PER_COLLECTION) {
-        size_t numLiveObjectsAtLastCollect = heap.numLiveObjectsAtLastCollect;
-        size_t numNewObjects = numLiveObjects - numLiveObjectsAtLastCollect;
-        const size_t newCost = numNewObjects + heap.extraCost;
-        if (newCost >= ALLOCATIONS_PER_COLLECTION && newCost >= numLiveObjectsAtLastCollect)
-            goto collect;
-    }
+allocate:
 
-    ASSERT(heap.operationInProgress == NoOperation);
-#ifndef NDEBUG
-    // FIXME: Consider doing this in NDEBUG builds too (see comment above).
-    heap.operationInProgress = Allocation;
-#endif
+    // Fast case: find the next garbage cell and recycle it.
 
-scan:
-    Block* targetBlock;
-    size_t targetBlockUsedCells;
-    if (i != usedBlocks) {
-        targetBlock = reinterpret_cast<Block*>(heap.blocks[i]);
-        targetBlockUsedCells = targetBlock->usedCells;
-        ASSERT(targetBlockUsedCells <= HeapConstants<heapType>::cellsPerBlock);
-        while (targetBlockUsedCells == HeapConstants<heapType>::cellsPerBlock) {
-            if (++i == usedBlocks)
-                goto collect;
-            targetBlock = reinterpret_cast<Block*>(heap.blocks[i]);
-            targetBlockUsedCells = targetBlock->usedCells;
-            ASSERT(targetBlockUsedCells <= HeapConstants<heapType>::cellsPerBlock);
-        }
-        heap.firstBlockWithPossibleSpace = i;
-    } else {
+    do {
+        ASSERT(m_heap.nextBlock < m_heap.usedBlocks);
+        Block* block = reinterpret_cast<Block*>(m_heap.blocks[m_heap.nextBlock]);
+        do {
+            ASSERT(m_heap.nextCell < HeapConstants::cellsPerBlock);
+            if (!block->marked.get(m_heap.nextCell)) { // Always false for the last cell in the block
+                Cell* cell = block->cells + m_heap.nextCell;
 
-collect:
-        size_t numLiveObjectsAtLastCollect = heap.numLiveObjectsAtLastCollect;
-        size_t numNewObjects = numLiveObjects - numLiveObjectsAtLastCollect;
-        const size_t newCost = numNewObjects + heap.extraCost;
+                m_heap.operationInProgress = Allocation;
+                JSCell* imp = reinterpret_cast<JSCell*>(cell);
+                imp->~JSCell();
+                m_heap.operationInProgress = NoOperation;
 
-        if (newCost >= ALLOCATIONS_PER_COLLECTION && newCost >= numLiveObjectsAtLastCollect) {
-#ifndef NDEBUG
-            heap.operationInProgress = NoOperation;
-#endif
-            bool foundGarbage = collect();
-            numLiveObjects = heap.numLiveObjects;
-            usedBlocks = heap.usedBlocks;
-            i = heap.firstBlockWithPossibleSpace;
-#ifndef NDEBUG
-            heap.operationInProgress = Allocation;
-#endif
-            if (foundGarbage)
-                goto scan;
-        }
+                ++m_heap.nextCell;
+                return cell;
+            }
+        } while (++m_heap.nextCell != HeapConstants::cellsPerBlock);
+        m_heap.nextCell = 0;
+    } while (++m_heap.nextBlock != m_heap.usedBlocks);
 
-        // didn't find a block, and GC didn't reclaim anything, need to allocate a new block
-        targetBlock = reinterpret_cast<Block*>(allocateBlock<heapType>());
-        heap.firstBlockWithPossibleSpace = heap.usedBlocks - 1;
-        targetBlockUsedCells = 0;
-    }
+    // Slow case: reached the end of the heap. Mark live objects and start over.
 
-    // find a free spot in the block and detach it from the free list
-    Cell* newCell = targetBlock->freeList;
+    reset();
+    goto allocate;
+}
 
-    // "next" field is a cell offset -- 0 means next cell, so a zeroed block is already initialized
-    targetBlock->freeList = (newCell + 1) + newCell->u.freeCell.next;
+void Heap::resizeBlocks()
+{
+    m_heap.didShrink = false;
 
-    targetBlock->usedCells = static_cast<uint32_t>(targetBlockUsedCells + 1);
-    heap.numLiveObjects = numLiveObjects + 1;
+    size_t usedCellCount = markedCells();
+    size_t minCellCount = usedCellCount + max(ALLOCATIONS_PER_COLLECTION, usedCellCount);
+    size_t minBlockCount = (minCellCount + HeapConstants::cellsPerBlock - 1) / HeapConstants::cellsPerBlock;
 
-#ifndef NDEBUG
-    // FIXME: Consider doing this in NDEBUG builds too (see comment above).
-    heap.operationInProgress = NoOperation;
-#endif
+    size_t maxCellCount = 1.25f * minCellCount;
+    size_t maxBlockCount = (maxCellCount + HeapConstants::cellsPerBlock - 1) / HeapConstants::cellsPerBlock;
 
-    return newCell;
+    if (m_heap.usedBlocks < minBlockCount)
+        growBlocks(minBlockCount);
+    else if (m_heap.usedBlocks > maxBlockCount)
+        shrinkBlocks(maxBlockCount);
 }
 
-void* Heap::allocate(size_t s)
+void Heap::growBlocks(size_t neededBlocks)
 {
-    return heapAllocate<PrimaryHeap>(s);
+    ASSERT(m_heap.usedBlocks < neededBlocks);
+    while (m_heap.usedBlocks < neededBlocks)
+        allocateBlock();
 }
 
-void* Heap::allocateNumber(size_t s)
+void Heap::shrinkBlocks(size_t neededBlocks)
 {
-    return heapAllocate<NumberHeap>(s);
+    ASSERT(m_heap.usedBlocks > neededBlocks);
+    
+    // Clear the always-on last bit, so isEmpty() isn't fooled by it.
+    for (size_t i = 0; i < m_heap.usedBlocks; ++i)
+        m_heap.blocks[i]->marked.clear(HeapConstants::cellsPerBlock - 1);
+
+    for (size_t i = 0; i != m_heap.usedBlocks && m_heap.usedBlocks != neededBlocks; ) {
+        if (m_heap.blocks[i]->marked.isEmpty()) {
+            freeBlock(i);
+        } else
+            ++i;
+    }
+
+    // Reset the always-on last bit.
+    for (size_t i = 0; i < m_heap.usedBlocks; ++i)
+        m_heap.blocks[i]->marked.set(HeapConstants::cellsPerBlock - 1);
 }
 
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 void* g_stackBase = 0;
 
 inline bool isPageWritable(void* page)
@@ -532,7 +536,8 @@ static void* getStackBase(void* previousFrame)
     }
 }
 #endif
-#if PLATFORM(HPUX)
+
+#if OS(HPUX)
 struct hpux_get_stack_base_data
 {
     pthread_t thread;
@@ -576,7 +581,7 @@ static void *hpux_get_stack_base()
 }
 #endif
 
-#if PLATFORM(QNX)
+#if OS(QNX)
 static inline void *currentThreadStackBaseQNX()
 {
     static void* stackBase = 0;
@@ -605,10 +610,10 @@ static inline void *currentThreadStackBaseQNX()
 
 static inline void* currentThreadStackBase()
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
     pthread_t thread = pthread_self();
     return pthread_get_stackaddr_np(thread);
-#elif PLATFORM(WIN_OS) && PLATFORM(X86) && COMPILER(MSVC)
+#elif OS(WINDOWS) && CPU(X86) && COMPILER(MSVC)
     // offset 0x18 from the FS segment register gives a pointer to
     // the thread information block for the current thread
     NT_TIB* pTib;
@@ -617,10 +622,11 @@ static inline void* currentThreadStackBase()
         MOV pTib, EAX
     }
     return static_cast<void*>(pTib->StackBase);
-#elif PLATFORM(WIN_OS) && PLATFORM(X86_64) && (COMPILER(MSVC) ||COMPILER(GCC))
+#elif OS(WINDOWS) && CPU(X86_64) && (COMPILER(MSVC) || COMPILER(GCC))
+    // FIXME: why only for MSVC?
     PNT_TIB64 pTib = reinterpret_cast<PNT_TIB64>(NtCurrentTeb());
     return reinterpret_cast<void*>(pTib->StackBase);
-#elif PLATFORM(WIN_OS) && PLATFORM(X86) && COMPILER(GCC)
+#elif OS(WINDOWS) && CPU(X86) && COMPILER(GCC)
     // offset 0x18 from the FS segment register gives a pointer to
     // the thread information block for the current thread
     NT_TIB* pTib;
@@ -628,15 +634,15 @@ static inline void* currentThreadStackBase()
           : "=r" (pTib)
         );
     return static_cast<void*>(pTib->StackBase);
-#elif PLATFORM(QNX)
-    return currentThreadStackBaseQNX();
-#elif PLATFORM(HPUX)
+#elif OS(HPUX)
     return hpux_get_stack_base();
-#elif PLATFORM(SOLARIS)
+#elif OS(QNX)
+    return currentThreadStackBaseQNX();
+#elif OS(SOLARIS)
     stack_t s;
     thr_stksegment(&s);
     return s.ss_sp;
-#elif PLATFORM(AIX)
+#elif OS(AIX)
     pthread_t thread = pthread_self();
     struct __pthrdsinfo threadinfo;
     char regbuf[256];
@@ -648,12 +654,12 @@ static inline void* currentThreadStackBase()
         return threadinfo.__pi_stackaddr;
 
     return 0;
-#elif PLATFORM(OPENBSD)
+#elif OS(OPENBSD)
     pthread_t thread = pthread_self();
     stack_t stack;
     pthread_stackseg_np(thread, &stack);
     return stack.ss_sp;
-#elif PLATFORM(SYMBIAN)
+#elif OS(SYMBIAN)
     static void* stackBase = 0;
     if (stackBase == 0) {
         TThreadStackInfo info;
@@ -662,11 +668,11 @@ static inline void* currentThreadStackBase()
         stackBase = (void*)info.iBase;
     }
     return (void*)stackBase;
-#elif PLATFORM(HAIKU)
+#elif OS(HAIKU)
     thread_info threadInfo;
     get_thread_info(find_thread(NULL), &threadInfo);
     return threadInfo.stack_end;
-#elif PLATFORM(UNIX)
+#elif OS(UNIX)
     static void* stackBase = 0;
     static size_t stackSize = 0;
     static pthread_t stackThread;
@@ -674,7 +680,7 @@ static inline void* currentThreadStackBase()
     if (stackBase == 0 || thread != stackThread) {
         pthread_attr_t sattr;
         pthread_attr_init(&sattr);
-#if HAVE(PTHREAD_NP_H) || PLATFORM(NETBSD)
+#if HAVE(PTHREAD_NP_H) || OS(NETBSD)
         // e.g. on FreeBSD 5.4, neundorf@kde.org
         pthread_attr_get_np(thread, &sattr);
 #else
@@ -688,7 +694,7 @@ static inline void* currentThreadStackBase()
         stackThread = thread;
     }
     return static_cast<char*>(stackBase) + stackSize;
-#elif PLATFORM(WINCE)
+#elif OS(WINCE)
     if (g_stackBase)
         return g_stackBase;
     else {
@@ -704,11 +710,10 @@ static inline void* currentThreadStackBase()
 
 static inline PlatformThread getCurrentPlatformThread()
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
     return pthread_mach_thread_np(pthread_self());
-#elif PLATFORM(WIN_OS)
-    HANDLE threadHandle = pthread_getw32threadhandle_np(pthread_self());
-    return PlatformThread(GetCurrentThreadId(), threadHandle);
+#elif OS(WINDOWS)
+    return pthread_getw32threadhandle_np(pthread_self());
 #endif
 }
 
@@ -777,10 +782,37 @@ void Heap::registerThread()
 
 #endif
 
-#define IS_POINTER_ALIGNED(p) (((intptr_t)(p) & (sizeof(char*) - 1)) == 0)
+inline bool isPointerAligned(void* p)
+{
+    return (((intptr_t)(p) & (sizeof(char*) - 1)) == 0);
+}
 
-// cell size needs to be a power of two for this to be valid
-#define IS_HALF_CELL_ALIGNED(p) (((intptr_t)(p) & (CELL_MASK >> 1)) == 0)
+// Cell size needs to be a power of two for isPossibleCell to be valid.
+COMPILE_ASSERT(sizeof(CollectorCell) % 2 == 0, Collector_cell_size_is_power_of_two);
+
+#if USE(JSVALUE32)
+static bool isHalfCellAligned(void *p)
+{
+    return (((intptr_t)(p) & (CELL_MASK >> 1)) == 0);
+}
+
+static inline bool isPossibleCell(void* p)
+{
+    return isHalfCellAligned(p) && p;
+}
+
+#else
+
+static inline bool isCellAligned(void *p)
+{
+    return (((intptr_t)(p) & CELL_MASK) == 0);
+}
+
+static inline bool isPossibleCell(void* p)
+{
+    return isCellAligned(p) && p;
+}
+#endif // USE(JSVALUE32)
 
 void Heap::markConservatively(MarkStack& markStack, void* start, void* end)
 {
@@ -791,46 +823,33 @@ void Heap::markConservatively(MarkStack& markStack, void* start, void* end)
     }
 
     ASSERT((static_cast<char*>(end) - static_cast<char*>(start)) < 0x1000000);
-    ASSERT(IS_POINTER_ALIGNED(start));
-    ASSERT(IS_POINTER_ALIGNED(end));
+    ASSERT(isPointerAligned(start));
+    ASSERT(isPointerAligned(end));
 
     char** p = static_cast<char**>(start);
     char** e = static_cast<char**>(end);
 
-    size_t usedPrimaryBlocks = primaryHeap.usedBlocks;
-    size_t usedNumberBlocks = numberHeap.usedBlocks;
-    CollectorBlock** primaryBlocks = primaryHeap.blocks;
-    CollectorBlock** numberBlocks = numberHeap.blocks;
-
-    const size_t lastCellOffset = sizeof(CollectorCell) * (CELLS_PER_BLOCK - 1);
-
+    CollectorBlock** blocks = m_heap.blocks;
     while (p != e) {
         char* x = *p++;
-        if (IS_HALF_CELL_ALIGNED(x) && x) {
+        if (isPossibleCell(x)) {
+            size_t usedBlocks;
             uintptr_t xAsBits = reinterpret_cast<uintptr_t>(x);
             xAsBits &= CELL_ALIGN_MASK;
+
             uintptr_t offset = xAsBits & BLOCK_OFFSET_MASK;
+            const size_t lastCellOffset = sizeof(CollectorCell) * (CELLS_PER_BLOCK - 1);
+            if (offset > lastCellOffset)
+                continue;
+
             CollectorBlock* blockAddr = reinterpret_cast<CollectorBlock*>(xAsBits - offset);
-            // Mark the the number heap, we can mark these Cells directly to avoid the virtual call cost
-            for (size_t block = 0; block < usedNumberBlocks; block++) {
-                if ((numberBlocks[block] == blockAddr) & (offset <= lastCellOffset)) {
-                    Heap::markCell(reinterpret_cast<JSCell*>(xAsBits));
-                    goto endMarkLoop;
-                }
+            usedBlocks = m_heap.usedBlocks;
+            for (size_t block = 0; block < usedBlocks; block++) {
+                if (blocks[block] != blockAddr)
+                    continue;
+                markStack.append(reinterpret_cast<JSCell*>(xAsBits));
+                markStack.drain();
             }
-          
-            // Mark the primary heap
-            for (size_t block = 0; block < usedPrimaryBlocks; block++) {
-                if ((primaryBlocks[block] == blockAddr) & (offset <= lastCellOffset)) {
-                    if (reinterpret_cast<CollectorCell*>(xAsBits)->u.freeCell.zeroIfFree) {
-                        markStack.append(reinterpret_cast<JSCell*>(xAsBits));
-                        markStack.drain();
-                    }
-                    break;
-                }
-            }
-        endMarkLoop:
-            ;
         }
     }
 }
@@ -869,10 +888,10 @@ void Heap::markCurrentThreadConservatively(MarkStack& markStack)
 
 static inline void suspendThread(const PlatformThread& platformThread)
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
     thread_suspend(platformThread);
-#elif PLATFORM(WIN_OS)
-    SuspendThread(platformThread.handle);
+#elif OS(WINDOWS)
+    SuspendThread(platformThread);
 #else
 #error Need a way to suspend threads on this platform
 #endif
@@ -880,10 +899,10 @@ static inline void suspendThread(const PlatformThread& platformThread)
 
 static inline void resumeThread(const PlatformThread& platformThread)
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
     thread_resume(platformThread);
-#elif PLATFORM(WIN_OS)
-    ResumeThread(platformThread.handle);
+#elif OS(WINDOWS)
+    ResumeThread(platformThread);
 #else
 #error Need a way to resume threads on this platform
 #endif
@@ -891,23 +910,23 @@ static inline void resumeThread(const PlatformThread& platformThread)
 
 typedef unsigned long usword_t; // word size, assumed to be either 32 or 64 bit
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 
-#if PLATFORM(X86)
+#if CPU(X86)
 typedef i386_thread_state_t PlatformThreadRegisters;
-#elif PLATFORM(X86_64)
+#elif CPU(X86_64)
 typedef x86_thread_state64_t PlatformThreadRegisters;
-#elif PLATFORM(PPC)
+#elif CPU(PPC)
 typedef ppc_thread_state_t PlatformThreadRegisters;
-#elif PLATFORM(PPC64)
+#elif CPU(PPC64)
 typedef ppc_thread_state64_t PlatformThreadRegisters;
-#elif PLATFORM(ARM)
+#elif CPU(ARM)
 typedef arm_thread_state_t PlatformThreadRegisters;
 #else
 #error Unknown Architecture
 #endif
 
-#elif PLATFORM(WIN_OS)&& PLATFORM(X86)
+#elif OS(WINDOWS) && CPU(X86)
 typedef CONTEXT PlatformThreadRegisters;
 #else
 #error Need a thread register struct for this platform
@@ -915,21 +934,21 @@ typedef CONTEXT PlatformThreadRegisters;
 
 static size_t getPlatformThreadRegisters(const PlatformThread& platformThread, PlatformThreadRegisters& regs)
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 
-#if PLATFORM(X86)
+#if CPU(X86)
     unsigned user_count = sizeof(regs)/sizeof(int);
     thread_state_flavor_t flavor = i386_THREAD_STATE;
-#elif PLATFORM(X86_64)
+#elif CPU(X86_64)
     unsigned user_count = x86_THREAD_STATE64_COUNT;
     thread_state_flavor_t flavor = x86_THREAD_STATE64;
-#elif PLATFORM(PPC) 
+#elif CPU(PPC) 
     unsigned user_count = PPC_THREAD_STATE_COUNT;
     thread_state_flavor_t flavor = PPC_THREAD_STATE;
-#elif PLATFORM(PPC64)
+#elif CPU(PPC64)
     unsigned user_count = PPC_THREAD_STATE64_COUNT;
     thread_state_flavor_t flavor = PPC_THREAD_STATE64;
-#elif PLATFORM(ARM)
+#elif CPU(ARM)
     unsigned user_count = ARM_THREAD_STATE_COUNT;
     thread_state_flavor_t flavor = ARM_THREAD_STATE;
 #else
@@ -943,11 +962,11 @@ static size_t getPlatformThreadRegisters(const PlatformThread& platformThread, P
         CRASH();
     }
     return user_count * sizeof(usword_t);
-// end PLATFORM(DARWIN)
+// end OS(DARWIN)
 
-#elif PLATFORM(WIN_OS) && PLATFORM(X86)
+#elif OS(WINDOWS) && CPU(X86)
     regs.ContextFlags = CONTEXT_INTEGER | CONTEXT_CONTROL | CONTEXT_SEGMENTS;
-    GetThreadContext(platformThread.handle, &regs);
+    GetThreadContext(platformThread, &regs);
     return sizeof(CONTEXT);
 #else
 #error Need a way to get thread registers on this platform
@@ -956,17 +975,17 @@ static size_t getPlatformThreadRegisters(const PlatformThread& platformThread, P
 
 static inline void* otherThreadStackPointer(const PlatformThreadRegisters& regs)
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 
 #if __DARWIN_UNIX03
 
-#if PLATFORM(X86)
+#if CPU(X86)
     return reinterpret_cast<void*>(regs.__esp);
-#elif PLATFORM(X86_64)
+#elif CPU(X86_64)
     return reinterpret_cast<void*>(regs.__rsp);
-#elif PLATFORM(PPC) || PLATFORM(PPC64)
+#elif CPU(PPC) || CPU(PPC64)
     return reinterpret_cast<void*>(regs.__r1);
-#elif PLATFORM(ARM)
+#elif CPU(ARM)
     return reinterpret_cast<void*>(regs.__sp);
 #else
 #error Unknown Architecture
@@ -974,11 +993,11 @@ static inline void* otherThreadStackPointer(const PlatformThreadRegisters& regs)
 
 #else // !__DARWIN_UNIX03
 
-#if PLATFORM(X86)
+#if CPU(X86)
     return reinterpret_cast<void*>(regs.esp);
-#elif PLATFORM(X86_64)
+#elif CPU(X86_64)
     return reinterpret_cast<void*>(regs.rsp);
-#elif (PLATFORM(PPC) || PLATFORM(PPC64))
+#elif CPU(PPC) || CPU(PPC64)
     return reinterpret_cast<void*>(regs.r1);
 #else
 #error Unknown Architecture
@@ -986,8 +1005,8 @@ static inline void* otherThreadStackPointer(const PlatformThreadRegisters& regs)
 
 #endif // __DARWIN_UNIX03
 
-// end PLATFORM(DARWIN)
-#elif PLATFORM(X86) && PLATFORM(WIN_OS)
+// end OS(DARWIN)
+#elif CPU(X86) && OS(WINDOWS)
     return reinterpret_cast<void*>((uintptr_t) regs.Esp);
 #else
 #error Need a way to get the stack pointer for another thread on this platform
@@ -1041,16 +1060,6 @@ void Heap::markStackObjectsConservatively(MarkStack& markStack)
 #endif
 }
 
-void Heap::setGCProtectNeedsLocking()
-{
-    // Most clients do not need to call this, with the notable exception of WebCore.
-    // Clients that use shared heap have JSLock protection, while others are supposed
-    // to do explicit locking. WebCore violates this contract in Database code,
-    // which calls gcUnprotect from a secondary thread.
-    if (!m_protectedValuesMutex)
-        m_protectedValuesMutex.set(new Mutex);
-}
-
 void Heap::protect(JSValue k)
 {
     ASSERT(k);
@@ -1059,13 +1068,7 @@ void Heap::protect(JSValue k)
     if (!k.isCell())
         return;
 
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->lock();
-
     m_protectedValues.add(k.asCell());
-
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->unlock();
 }
 
 void Heap::unprotect(JSValue k)
@@ -1076,133 +1079,80 @@ void Heap::unprotect(JSValue k)
     if (!k.isCell())
         return;
 
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->lock();
-
     m_protectedValues.remove(k.asCell());
-
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->unlock();
 }
 
 void Heap::markProtectedObjects(MarkStack& markStack)
 {
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->lock();
-
     ProtectCountSet::iterator end = m_protectedValues.end();
     for (ProtectCountSet::iterator it = m_protectedValues.begin(); it != end; ++it) {
         markStack.append(it->first);
         markStack.drain();
     }
+}
 
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->unlock();
+void Heap::clearMarkBits()
+{
+    for (size_t i = 0; i < m_heap.usedBlocks; ++i)
+        clearMarkBits(m_heap.blocks[i]);
 }
 
-template <HeapType heapType> size_t Heap::sweep()
+void Heap::clearMarkBits(CollectorBlock* block)
 {
-    typedef typename HeapConstants<heapType>::Block Block;
-    typedef typename HeapConstants<heapType>::Cell Cell;
+    // allocate assumes that the last cell in every block is marked.
+    block->marked.clearAll();
+    block->marked.set(HeapConstants::cellsPerBlock - 1);
+}
 
-    // SWEEP: delete everything with a zero refcount (garbage) and unmark everything else
-    CollectorHeap& heap = heapType == PrimaryHeap ? primaryHeap : numberHeap;
-    
-    size_t emptyBlocks = 0;
-    size_t numLiveObjects = heap.numLiveObjects;
-    
-    for (size_t block = 0; block < heap.usedBlocks; block++) {
-        Block* curBlock = reinterpret_cast<Block*>(heap.blocks[block]);
-        
-        size_t usedCells = curBlock->usedCells;
-        Cell* freeList = curBlock->freeList;
-        
-        if (usedCells == HeapConstants<heapType>::cellsPerBlock) {
-            // special case with a block where all cells are used -- testing indicates this happens often
-            for (size_t i = 0; i < HeapConstants<heapType>::cellsPerBlock; i++) {
-                if (!curBlock->marked.get(i >> HeapConstants<heapType>::bitmapShift)) {
-                    Cell* cell = curBlock->cells + i;
-                    
-                    if (heapType != NumberHeap) {
-                        JSCell* imp = reinterpret_cast<JSCell*>(cell);
-                        // special case for allocated but uninitialized object
-                        // (We don't need this check earlier because nothing prior this point 
-                        // assumes the object has a valid vptr.)
-                        if (cell->u.freeCell.zeroIfFree == 0)
-                            continue;
-                        
-                        imp->~JSCell();
-                    }
-                    
-                    --usedCells;
-                    --numLiveObjects;
-                    
-                    // put cell on the free list
-                    cell->u.freeCell.zeroIfFree = 0;
-                    cell->u.freeCell.next = freeList - (cell + 1);
-                    freeList = cell;
-                }
-            }
-        } else {
-            size_t minimumCellsToProcess = usedCells;
-            for (size_t i = 0; (i < minimumCellsToProcess) & (i < HeapConstants<heapType>::cellsPerBlock); i++) {
-                Cell* cell = curBlock->cells + i;
-                if (cell->u.freeCell.zeroIfFree == 0) {
-                    ++minimumCellsToProcess;
-                } else {
-                    if (!curBlock->marked.get(i >> HeapConstants<heapType>::bitmapShift)) {
-                        if (heapType != NumberHeap) {
-                            JSCell* imp = reinterpret_cast<JSCell*>(cell);
-                            imp->~JSCell();
-                        }
-                        --usedCells;
-                        --numLiveObjects;
-                        
-                        // put cell on the free list
-                        cell->u.freeCell.zeroIfFree = 0;
-                        cell->u.freeCell.next = freeList - (cell + 1); 
-                        freeList = cell;
-                    }
-                }
-            }
-        }
-        
-        curBlock->usedCells = static_cast<uint32_t>(usedCells);
-        curBlock->freeList = freeList;
-        curBlock->marked.clearAll();
-        
-        if (!usedCells)
-            ++emptyBlocks;
-    }
-    
-    if (heap.numLiveObjects != numLiveObjects)
-        heap.firstBlockWithPossibleSpace = 0;
-    
-    heap.numLiveObjects = numLiveObjects;
-    heap.numLiveObjectsAtLastCollect = numLiveObjects;
-    heap.extraCost = 0;
-    
-    if (!emptyBlocks)
-        return numLiveObjects;
+size_t Heap::markedCells(size_t startBlock, size_t startCell) const
+{
+    ASSERT(startBlock <= m_heap.usedBlocks);
+    ASSERT(startCell < HeapConstants::cellsPerBlock);
 
-    size_t neededCells = 1.25f * (numLiveObjects + max(ALLOCATIONS_PER_COLLECTION, numLiveObjects));
-    size_t neededBlocks = (neededCells + HeapConstants<heapType>::cellsPerBlock - 1) / HeapConstants<heapType>::cellsPerBlock;
-    for (size_t block = 0; block < heap.usedBlocks; block++) {
-        if (heap.usedBlocks <= neededBlocks)
-            break;
+    if (startBlock >= m_heap.usedBlocks)
+        return 0;
+
+    size_t result = 0;
+    result += m_heap.blocks[startBlock]->marked.count(startCell);
+    for (size_t i = startBlock + 1; i < m_heap.usedBlocks; ++i)
+        result += m_heap.blocks[i]->marked.count();
+
+    return result;
+}
 
-        Block* curBlock = reinterpret_cast<Block*>(heap.blocks[block]);
-        if (curBlock->usedCells)
-            continue;
+void Heap::sweep()
+{
+    ASSERT(m_heap.operationInProgress == NoOperation);
+    if (m_heap.operationInProgress != NoOperation)
+        CRASH();
+    m_heap.operationInProgress = Collection;
+    
+#if !ENABLE(JSC_ZOMBIES)
+    Structure* dummyMarkableCellStructure = m_globalData->dummyMarkableCellStructure.get();
+#endif
 
-        freeBlock<heapType>(block);
-        block--; // Don't move forward a step in this case
+    DeadObjectIterator it(m_heap, m_heap.nextBlock, m_heap.nextCell);
+    DeadObjectIterator end(m_heap, m_heap.usedBlocks);
+    for ( ; it != end; ++it) {
+        JSCell* cell = *it;
+#if ENABLE(JSC_ZOMBIES)
+        if (!cell->isZombie()) {
+            const ClassInfo* info = cell->classInfo();
+            cell->~JSCell();
+            new (cell) JSZombie(info, JSZombie::leakedZombieStructure());
+            Heap::markCell(cell);
+        }
+#else
+        cell->~JSCell();
+        // Callers of sweep assume it's safe to mark any cell in the heap.
+        new (cell) JSCell(dummyMarkableCellStructure);
+#endif
     }
 
-    return numLiveObjects;
+    m_heap.operationInProgress = NoOperation;
 }
 
-bool Heap::collect()
+void Heap::markRoots()
 {
 #ifndef NDEBUG
     if (m_globalData->isSharedInstance) {
@@ -1211,27 +1161,34 @@ bool Heap::collect()
     }
 #endif
 
-    ASSERT((primaryHeap.operationInProgress == NoOperation) | (numberHeap.operationInProgress == NoOperation));
-    if ((primaryHeap.operationInProgress != NoOperation) | (numberHeap.operationInProgress != NoOperation))
+    ASSERT(m_heap.operationInProgress == NoOperation);
+    if (m_heap.operationInProgress != NoOperation)
         CRASH();
 
-    JAVASCRIPTCORE_GC_BEGIN();
-    primaryHeap.operationInProgress = Collection;
-    numberHeap.operationInProgress = Collection;
+    m_heap.operationInProgress = Collection;
 
-    // MARK: first mark all referenced objects recursively starting out from the set of root objects
     MarkStack& markStack = m_globalData->markStack;
+
+    // Reset mark bits.
+    clearMarkBits();
+
+    // Mark stack roots.
     markStackObjectsConservatively(markStack);
+    m_globalData->interpreter->registerFile().markCallFrames(markStack, this);
+
+    // Mark explicitly registered roots.
     markProtectedObjects(markStack);
+
 #if QT_BUILD_SCRIPT_LIB
     if (m_globalData->clientData)
         m_globalData->clientData->mark(markStack);
 #endif
+
+    // Mark misc. other roots.
     if (m_markListSet && m_markListSet->size())
         MarkedArgumentBuffer::markLists(markStack, *m_markListSet);
     if (m_globalData->exception)
         markStack.append(m_globalData->exception);
-    m_globalData->interpreter->registerFile().markCallFrames(markStack, this);
     m_globalData->smallStrings.markChildren(markStack);
     if (m_globalData->functionCodeBlockBeingReparsed)
         m_globalData->functionCodeBlockBeingReparsed->markAggregate(markStack);
@@ -1240,41 +1197,28 @@ bool Heap::collect()
 
     markStack.drain();
     markStack.compact();
-    JAVASCRIPTCORE_GC_MARKED();
-
-    size_t originalLiveObjects = primaryHeap.numLiveObjects + numberHeap.numLiveObjects;
-    size_t numLiveObjects = sweep<PrimaryHeap>();
-    numLiveObjects += sweep<NumberHeap>();
-
-    primaryHeap.operationInProgress = NoOperation;
-    numberHeap.operationInProgress = NoOperation;
-    JAVASCRIPTCORE_GC_END(originalLiveObjects, numLiveObjects);
 
-    return numLiveObjects < originalLiveObjects;
+    m_heap.operationInProgress = NoOperation;
 }
 
-size_t Heap::objectCount() 
+size_t Heap::objectCount() const
 {
-    return primaryHeap.numLiveObjects + numberHeap.numLiveObjects - m_globalData->smallStrings.count(); 
+    return m_heap.nextBlock * HeapConstants::cellsPerBlock // allocated full blocks
+           + m_heap.nextCell // allocated cells in current block
+           + markedCells(m_heap.nextBlock, m_heap.nextCell) // marked cells in remainder of m_heap
+           - m_heap.usedBlocks; // 1 cell per block is a dummy sentinel
 }
 
-template <HeapType heapType> 
-static void addToStatistics(Heap::Statistics& statistics, const CollectorHeap& heap)
+void Heap::addToStatistics(Heap::Statistics& statistics) const
 {
-    typedef HeapConstants<heapType> HC;
-    for (size_t i = 0; i < heap.usedBlocks; ++i) {
-        if (heap.blocks[i]) {
-            statistics.size += BLOCK_SIZE;
-            statistics.free += (HC::cellsPerBlock - heap.blocks[i]->usedCells) * HC::cellSize;
-        }
-    }
+    statistics.size += m_heap.usedBlocks * BLOCK_SIZE;
+    statistics.free += m_heap.usedBlocks * BLOCK_SIZE - (objectCount() * HeapConstants::cellSize);
 }
 
 Heap::Statistics Heap::statistics() const
 {
     Statistics statistics = { 0, 0 };
-    JSC::addToStatistics<PrimaryHeap>(statistics, primaryHeap);
-    JSC::addToStatistics<NumberHeap>(statistics, numberHeap);
+    addToStatistics(statistics);
     return statistics;
 }
 
@@ -1293,9 +1237,6 @@ size_t Heap::globalObjectCount()
 
 size_t Heap::protectedGlobalObjectCount()
 {
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->lock();
-
     size_t count = 0;
     if (JSGlobalObject* head = m_globalData->head) {
         JSGlobalObject* o = head;
@@ -1306,23 +1247,12 @@ size_t Heap::protectedGlobalObjectCount()
         } while (o != head);
     }
 
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->unlock();
-
     return count;
 }
 
 size_t Heap::protectedObjectCount()
 {
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->lock();
-
-    size_t result = m_protectedValues.size();
-
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->unlock();
-
-    return result;
+    return m_protectedValues.size();
 }
 
 static const char* typeName(JSCell* cell)
@@ -1335,6 +1265,10 @@ static const char* typeName(JSCell* cell)
 #endif
     if (cell->isGetterSetter())
         return "gettersetter";
+    if (cell->isAPIValueWrapper())
+        return "value wrapper";
+    if (cell->isPropertyNameIterator())
+        return "for-in iterator";
     ASSERT(cell->isObject());
     const ClassInfo* info = cell->classInfo();
     return info ? info->className : "Object";
@@ -1344,32 +1278,70 @@ HashCountedSet<const char*>* Heap::protectedObjectTypeCounts()
 {
     HashCountedSet<const char*>* counts = new HashCountedSet<const char*>;
 
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->lock();
-
     ProtectCountSet::iterator end = m_protectedValues.end();
     for (ProtectCountSet::iterator it = m_protectedValues.begin(); it != end; ++it)
         counts->add(typeName(it->first));
 
-    if (m_protectedValuesMutex)
-        m_protectedValuesMutex->unlock();
-
     return counts;
 }
 
 bool Heap::isBusy()
 {
-    return (primaryHeap.operationInProgress != NoOperation) | (numberHeap.operationInProgress != NoOperation);
+    return m_heap.operationInProgress != NoOperation;
+}
+
+void Heap::reset()
+{
+    JAVASCRIPTCORE_GC_BEGIN();
+
+    markRoots();
+
+    JAVASCRIPTCORE_GC_MARKED();
+
+    m_heap.nextCell = 0;
+    m_heap.nextBlock = 0;
+    m_heap.nextNumber = 0;
+    m_heap.extraCost = 0;
+#if ENABLE(JSC_ZOMBIES)
+    sweep();
+#endif
+    resizeBlocks();
+
+    JAVASCRIPTCORE_GC_END();
+}
+
+void Heap::collectAllGarbage()
+{
+    JAVASCRIPTCORE_GC_BEGIN();
+
+    // If the last iteration through the heap deallocated blocks, we need
+    // to clean up remaining garbage before marking. Otherwise, the conservative
+    // marking mechanism might follow a pointer to unmapped memory.
+    if (m_heap.didShrink)
+        sweep();
+
+    markRoots();
+
+    JAVASCRIPTCORE_GC_MARKED();
+
+    m_heap.nextCell = 0;
+    m_heap.nextBlock = 0;
+    m_heap.nextNumber = 0;
+    m_heap.extraCost = 0;
+    sweep();
+    resizeBlocks();
+
+    JAVASCRIPTCORE_GC_END();
 }
 
-Heap::iterator Heap::primaryHeapBegin()
+LiveObjectIterator Heap::primaryHeapBegin()
 {
-    return iterator(primaryHeap.blocks, primaryHeap.blocks + primaryHeap.usedBlocks);
+    return LiveObjectIterator(m_heap, 0);
 }
 
-Heap::iterator Heap::primaryHeapEnd()
+LiveObjectIterator Heap::primaryHeapEnd()
 {
-    return iterator(primaryHeap.blocks + primaryHeap.usedBlocks, primaryHeap.blocks + primaryHeap.usedBlocks);
+    return LiveObjectIterator(m_heap, m_heap.usedBlocks);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.h
index 0ecff19..7f7a679 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.h
@@ -28,9 +28,9 @@
 #include <wtf/HashSet.h>
 #include <wtf/Noncopyable.h>
 #include <wtf/OwnPtr.h>
+#include <wtf/StdLibExtras.h>
 #include <wtf/Threading.h>
 
-// This is supremely lame that we require pthreads to build on windows.
 #if ENABLE(JSC_MULTIPLE_THREADS)
 #include <pthread.h>
 #endif
@@ -47,19 +47,21 @@ namespace JSC {
     class MarkStack;
 
     enum OperationInProgress { NoOperation, Allocation, Collection };
-    enum HeapType { PrimaryHeap, NumberHeap };
 
-    template <HeapType> class CollectorHeapIterator;
+    class LiveObjectIterator;
 
     struct CollectorHeap {
+        size_t nextBlock;
+        size_t nextCell;
         CollectorBlock** blocks;
+        
+        void* nextNumber;
+
         size_t numBlocks;
         size_t usedBlocks;
-        size_t firstBlockWithPossibleSpace;
 
-        size_t numLiveObjects;
-        size_t numLiveObjectsAtLastCollect;
         size_t extraCost;
+        bool didShrink;
 
         OperationInProgress operationInProgress;
     };
@@ -67,36 +69,27 @@ namespace JSC {
     class Heap : public Noncopyable {
     public:
         class Thread;
-        typedef CollectorHeapIterator<PrimaryHeap> iterator;
 
         void destroy();
 
-#ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
-        // We can inline these functions because everything is compiled as
-        // one file, so the heapAllocate template definitions are available.
-        // However, allocateNumber is used via jsNumberCell outside JavaScriptCore.
-        // Thus allocateNumber needs to provide a non-inline version too.
-        void* inlineAllocateNumber(size_t s) { return heapAllocate<NumberHeap>(s); }
-        void* inlineAllocate(size_t s) { return heapAllocate<PrimaryHeap>(s); }
-#endif
         void* allocateNumber(size_t);
         void* allocate(size_t);
 
-        bool collect();
         bool isBusy(); // true if an allocation or collection is in progress
+        void collectAllGarbage();
 
-        static const size_t minExtraCostSize = 256;
+        static const size_t minExtraCost = 256;
+        static const size_t maxExtraCost = 1024 * 1024;
 
         void reportExtraMemoryCost(size_t cost);
 
-        size_t objectCount();
+        size_t objectCount() const;
         struct Statistics {
             size_t size;
             size_t free;
         };
         Statistics statistics() const;
 
-        void setGCProtectNeedsLocking();
         void protect(JSValue);
         void unprotect(JSValue);
 
@@ -120,13 +113,12 @@ namespace JSC {
         JSGlobalData* globalData() const { return m_globalData; }
         static bool isNumber(JSCell*);
         
-        // Iterators for the object heap.
-        iterator primaryHeapBegin();
-        iterator primaryHeapEnd();
+        LiveObjectIterator primaryHeapBegin();
+        LiveObjectIterator primaryHeapEnd();
 
     private:
-        template <HeapType heapType> void* heapAllocate(size_t);
-        template <HeapType heapType> size_t sweep();
+        void reset();
+        void sweep();
         static CollectorBlock* cellBlock(const JSCell*);
         static size_t cellOffset(const JSCell*);
 
@@ -134,12 +126,22 @@ namespace JSC {
         Heap(JSGlobalData*);
         ~Heap();
 
-        template <HeapType heapType> NEVER_INLINE CollectorBlock* allocateBlock();
-        template <HeapType heapType> NEVER_INLINE void freeBlock(size_t);
-        NEVER_INLINE void freeBlock(CollectorBlock*);
-        void freeBlocks(CollectorHeap*);
+        NEVER_INLINE CollectorBlock* allocateBlock();
+        NEVER_INLINE void freeBlock(size_t);
+        NEVER_INLINE void freeBlockPtr(CollectorBlock*);
+        void freeBlocks();
+        void resizeBlocks();
+        void growBlocks(size_t neededBlocks);
+        void shrinkBlocks(size_t neededBlocks);
+        void clearMarkBits();
+        void clearMarkBits(CollectorBlock*);
+        size_t markedCells(size_t startBlock = 0, size_t startCell = 0) const;
 
         void recordExtraCost(size_t);
+
+        void addToStatistics(Statistics&) const;
+
+        void markRoots();
         void markProtectedObjects(MarkStack&);
         void markCurrentThreadConservatively(MarkStack&);
         void markCurrentThreadConservativelyInternal(MarkStack&);
@@ -148,10 +150,8 @@ namespace JSC {
 
         typedef HashCountedSet<JSCell*> ProtectCountSet;
 
-        CollectorHeap primaryHeap;
-        CollectorHeap numberHeap;
+        CollectorHeap m_heap;
 
-        OwnPtr<Mutex> m_protectedValuesMutex; // Only non-null if the client explicitly requested it via setGCPrtotectNeedsLocking().
         ProtectCountSet m_protectedValues;
 
         HashSet<MarkedArgumentBuffer*>* m_markListSet;
@@ -181,7 +181,7 @@ namespace JSC {
 #endif
     template<> struct CellSize<sizeof(uint64_t)> { static const size_t m_value = 64; };
 
-#if PLATFORM(WINCE) || PLATFORM(SYMBIAN)
+#if OS(WINCE) || OS(SYMBIAN)
     const size_t BLOCK_SIZE = 64 * 1024; // 64k
 #else
     const size_t BLOCK_SIZE = 64 * 4096; // 256k
@@ -196,87 +196,60 @@ namespace JSC {
     const size_t SMALL_CELL_SIZE = CELL_SIZE / 2;
     const size_t CELL_MASK = CELL_SIZE - 1;
     const size_t CELL_ALIGN_MASK = ~CELL_MASK;
-    const size_t CELLS_PER_BLOCK = (BLOCK_SIZE * 8 - sizeof(uint32_t) * 8 - sizeof(void *) * 8 - 2 * (7 + 3 * 8)) / (CELL_SIZE * 8 + 2);
-    const size_t SMALL_CELLS_PER_BLOCK = 2 * CELLS_PER_BLOCK;
+    const size_t CELLS_PER_BLOCK = (BLOCK_SIZE - sizeof(Heap*)) * 8 * CELL_SIZE / (8 * CELL_SIZE + 1) / CELL_SIZE; // one bitmap byte can represent 8 cells.
+    
     const size_t BITMAP_SIZE = (CELLS_PER_BLOCK + 7) / 8;
     const size_t BITMAP_WORDS = (BITMAP_SIZE + 3) / sizeof(uint32_t);
-  
+
     struct CollectorBitmap {
         uint32_t bits[BITMAP_WORDS];
         bool get(size_t n) const { return !!(bits[n >> 5] & (1 << (n & 0x1F))); } 
         void set(size_t n) { bits[n >> 5] |= (1 << (n & 0x1F)); } 
         void clear(size_t n) { bits[n >> 5] &= ~(1 << (n & 0x1F)); } 
         void clearAll() { memset(bits, 0, sizeof(bits)); }
+        size_t count(size_t startCell = 0)
+        {
+            size_t result = 0;
+            for ( ; (startCell & 0x1F) != 0; ++startCell) {
+                if (get(startCell))
+                    ++result;
+            }
+            for (size_t i = startCell >> 5; i < BITMAP_WORDS; ++i)
+                result += WTF::bitCount(bits[i]);
+            return result;
+        }
+        size_t isEmpty() // Much more efficient than testing count() == 0.
+        {
+            for (size_t i = 0; i < BITMAP_WORDS; ++i)
+                if (bits[i] != 0)
+                    return false;
+            return true;
+        }
     };
   
     struct CollectorCell {
-        union {
-            double memory[CELL_ARRAY_LENGTH];
-            struct {
-                void* zeroIfFree;
-                ptrdiff_t next;
-            } freeCell;
-        } u;
-    };
-
-    struct SmallCollectorCell {
-        union {
-            double memory[CELL_ARRAY_LENGTH / 2];
-            struct {
-                void* zeroIfFree;
-                ptrdiff_t next;
-            } freeCell;
-        } u;
+        double memory[CELL_ARRAY_LENGTH];
     };
 
     class CollectorBlock {
     public:
         CollectorCell cells[CELLS_PER_BLOCK];
-        uint32_t usedCells;
-        CollectorCell* freeList;
-        CollectorBitmap marked;
-        Heap* heap;
-        HeapType type;
-    };
-
-    class SmallCellCollectorBlock {
-    public:
-        SmallCollectorCell cells[SMALL_CELLS_PER_BLOCK];
-        uint32_t usedCells;
-        SmallCollectorCell* freeList;
         CollectorBitmap marked;
         Heap* heap;
-        HeapType type;
     };
-    
-    template <HeapType heapType> struct HeapConstants;
 
-    template <> struct HeapConstants<PrimaryHeap> {
+    struct HeapConstants {
         static const size_t cellSize = CELL_SIZE;
         static const size_t cellsPerBlock = CELLS_PER_BLOCK;
-        static const size_t bitmapShift = 0;
         typedef CollectorCell Cell;
         typedef CollectorBlock Block;
     };
 
-    template <> struct HeapConstants<NumberHeap> {
-        static const size_t cellSize = SMALL_CELL_SIZE;
-        static const size_t cellsPerBlock = SMALL_CELLS_PER_BLOCK;
-        static const size_t bitmapShift = 1;
-        typedef SmallCollectorCell Cell;
-        typedef SmallCellCollectorBlock Block;
-    };
-
     inline CollectorBlock* Heap::cellBlock(const JSCell* cell)
     {
         return reinterpret_cast<CollectorBlock*>(reinterpret_cast<uintptr_t>(cell) & BLOCK_MASK);
     }
 
-    inline bool Heap::isNumber(JSCell* cell)
-    {
-        return Heap::cellBlock(cell)->type == NumberHeap;
-    }
-
     inline size_t Heap::cellOffset(const JSCell* cell)
     {
         return (reinterpret_cast<uintptr_t>(cell) & BLOCK_OFFSET_MASK) / CELL_SIZE;
@@ -294,8 +267,20 @@ namespace JSC {
 
     inline void Heap::reportExtraMemoryCost(size_t cost)
     {
-        if (cost > minExtraCostSize) 
-            recordExtraCost(cost / (CELL_SIZE * 2)); 
+        if (cost > minExtraCost) 
+            recordExtraCost(cost);
+    }
+    
+    inline void* Heap::allocateNumber(size_t s)
+    {
+        if (void* result = m_heap.nextNumber) {
+            m_heap.nextNumber = 0;
+            return result;
+        }
+
+        void* result = allocate(s);
+        m_heap.nextNumber = static_cast<char*>(result) + (CELL_SIZE / 2);
+        return result;
     }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CollectorHeapIterator.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CollectorHeapIterator.h
index e38a852..e4f2f91 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CollectorHeapIterator.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CollectorHeapIterator.h
@@ -31,58 +31,108 @@
 
 namespace JSC {
 
-    template <HeapType heapType> class CollectorHeapIterator {
+    class CollectorHeapIterator {
     public:
-        CollectorHeapIterator(CollectorBlock** block, CollectorBlock** endBlock);
-
-        bool operator!=(const CollectorHeapIterator<heapType>& other) { return m_block != other.m_block || m_cell != other.m_cell; }
-        CollectorHeapIterator<heapType>& operator++();
+        bool operator!=(const CollectorHeapIterator& other);
         JSCell* operator*() const;
     
-    private:
-        typedef typename HeapConstants<heapType>::Block Block;
-        typedef typename HeapConstants<heapType>::Cell Cell;
-
-        Block** m_block;
-        Block** m_endBlock;
-        Cell* m_cell;
-        Cell* m_endCell;
+    protected:
+        CollectorHeapIterator(CollectorHeap&, size_t startBlock, size_t startCell);
+        void advance(size_t cellsPerBlock);
+
+        CollectorHeap& m_heap;
+        size_t m_block;
+        size_t m_cell;
+    };
+
+    class LiveObjectIterator : public CollectorHeapIterator {
+    public:
+        LiveObjectIterator(CollectorHeap&, size_t startBlock, size_t startCell = 0);
+        LiveObjectIterator& operator++();
+    };
+
+    class DeadObjectIterator : public CollectorHeapIterator {
+    public:
+        DeadObjectIterator(CollectorHeap&, size_t startBlock, size_t startCell = 0);
+        DeadObjectIterator& operator++();
+    };
+
+    class ObjectIterator : public CollectorHeapIterator {
+    public:
+        ObjectIterator(CollectorHeap&, size_t startBlock, size_t startCell = 0);
+        ObjectIterator& operator++();
     };
 
-    template <HeapType heapType> 
-    CollectorHeapIterator<heapType>::CollectorHeapIterator(CollectorBlock** block, CollectorBlock** endBlock)
-        : m_block(reinterpret_cast<Block**>(block))
-        , m_endBlock(reinterpret_cast<Block**>(endBlock))
-        , m_cell(m_block == m_endBlock ? 0 : (*m_block)->cells)
-        , m_endCell(m_block == m_endBlock ? 0 : (*m_block)->cells + HeapConstants<heapType>::cellsPerBlock)
+    inline CollectorHeapIterator::CollectorHeapIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
+        : m_heap(heap)
+        , m_block(startBlock)
+        , m_cell(startCell)
+    {
+    }
+
+    inline bool CollectorHeapIterator::operator!=(const CollectorHeapIterator& other)
+    {
+        return m_block != other.m_block || m_cell != other.m_cell;
+    }
+
+    inline JSCell* CollectorHeapIterator::operator*() const
+    {
+        return reinterpret_cast<JSCell*>(m_heap.blocks[m_block]->cells + m_cell);
+    }
+    
+    inline void CollectorHeapIterator::advance(size_t cellsPerBlock)
+    {
+        ++m_cell;
+        if (m_cell == cellsPerBlock) {
+            m_cell = 0;
+            ++m_block;
+        }
+    }
+
+    inline LiveObjectIterator::LiveObjectIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
+        : CollectorHeapIterator(heap, startBlock, startCell - 1)
+    {
+        ++(*this);
+    }
+
+    inline LiveObjectIterator& LiveObjectIterator::operator++()
+    {
+        if (m_block < m_heap.nextBlock || m_cell < m_heap.nextCell) {
+            advance(HeapConstants::cellsPerBlock);
+            return *this;
+        }
+
+        do {
+            advance(HeapConstants::cellsPerBlock);
+        } while (m_block < m_heap.usedBlocks && !m_heap.blocks[m_block]->marked.get(m_cell));
+        return *this;
+    }
+
+    inline DeadObjectIterator::DeadObjectIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
+        : CollectorHeapIterator(heap, startBlock, startCell - 1)
     {
-        if (m_cell && m_cell->u.freeCell.zeroIfFree == 0)
-            ++*this;
+        ++(*this);
     }
 
-    template <HeapType heapType> 
-    CollectorHeapIterator<heapType>& CollectorHeapIterator<heapType>::operator++()
+    inline DeadObjectIterator& DeadObjectIterator::operator++()
     {
         do {
-            for (++m_cell; m_cell != m_endCell; ++m_cell)
-                if (m_cell->u.freeCell.zeroIfFree != 0) {
-                    return *this;
-                }
-
-            if (++m_block != m_endBlock) {
-                m_cell = (*m_block)->cells;
-                m_endCell = (*m_block)->cells + HeapConstants<heapType>::cellsPerBlock;
-            }
-        } while(m_block != m_endBlock);
-
-        m_cell = 0;
+            advance(HeapConstants::cellsPerBlock);
+            ASSERT(m_block > m_heap.nextBlock || (m_block == m_heap.nextBlock && m_cell >= m_heap.nextCell));
+        } while (m_block < m_heap.usedBlocks && m_heap.blocks[m_block]->marked.get(m_cell));
         return *this;
     }
 
-    template <HeapType heapType> 
-    JSCell* CollectorHeapIterator<heapType>::operator*() const
+    inline ObjectIterator::ObjectIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
+        : CollectorHeapIterator(heap, startBlock, startCell - 1)
     {
-        return reinterpret_cast<JSCell*>(m_cell);
+        ++(*this);
+    }
+
+    inline ObjectIterator& ObjectIterator::operator++()
+    {
+        advance(HeapConstants::cellsPerBlock);
+        return *this;
     }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CommonIdentifiers.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CommonIdentifiers.h
index abe5038..de24f4a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CommonIdentifiers.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/CommonIdentifiers.h
@@ -50,6 +50,7 @@
     macro(get) \
     macro(getPrototypeOf) \
     macro(getOwnPropertyDescriptor) \
+    macro(getOwnPropertyNames) \
     macro(hasOwnProperty) \
     macro(ignoreCase) \
     macro(index) \
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Completion.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Completion.cpp
index 3ad467d..2f88df9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Completion.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Completion.cpp
@@ -31,18 +31,15 @@
 #include "Debugger.h"
 #include <stdio.h>
 
-#ifdef QT_BUILD_SCRIPT_LIB
-#include "DebuggerCallFrame.h"
-#endif
-
 namespace JSC {
 
 Completion checkSyntax(ExecState* exec, const SourceCode& source)
 {
     JSLock lock(exec);
+    ASSERT(exec->globalData().identifierTable == currentIdentifierTable());
 
-    ProgramExecutable program(exec, source);
-    JSObject* error = program.checkSyntax(exec);
+    RefPtr<ProgramExecutable> program = ProgramExecutable::create(exec, source);
+    JSObject* error = program->checkSyntax(exec);
     if (error)
         return Completion(Throw, error);
 
@@ -52,23 +49,23 @@ Completion checkSyntax(ExecState* exec, const SourceCode& source)
 Completion evaluate(ExecState* exec, ScopeChain& scopeChain, const SourceCode& source, JSValue thisValue)
 {
     JSLock lock(exec);
+    ASSERT(exec->globalData().identifierTable == currentIdentifierTable());
 
-    ProgramExecutable program(exec, source);
-    JSObject* error = program.compile(exec, scopeChain.node());
+    RefPtr<ProgramExecutable> program = ProgramExecutable::create(exec, source);
+    JSObject* error = program->compile(exec, scopeChain.node());
     if (error)
         return Completion(Throw, error);
 
     JSObject* thisObj = (!thisValue || thisValue.isUndefinedOrNull()) ? exec->dynamicGlobalObject() : thisValue.toObject(exec);
 
     JSValue exception;
-    JSValue result = exec->interpreter()->execute(&program, exec, scopeChain.node(), thisObj, &exception);
+    JSValue result = exec->interpreter()->execute(program.get(), exec, scopeChain.node(), thisObj, &exception);
 
     if (exception) {
         if (exception.isObject() && asObject(exception)->isWatchdogException())
             return Completion(Interrupted, exception);
         return Completion(Throw, exception);
     }
-
     return Completion(Normal, result);
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.cpp
index 3dfc918..06f9459 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.cpp
@@ -28,7 +28,6 @@
 
 #include "JSFunction.h"
 
-
 #ifdef QT_BUILD_SCRIPT_LIB
 #include "Debugger.h"
 #include "DebuggerCallFrame.h"
@@ -53,13 +52,13 @@ JSObject* JSC::NativeConstrWrapper::operator() (ExecState* exec, JSObject* jsobj
 }
 #endif
 
-JSObject* construct(ExecState* exec, JSValue callee, ConstructType constructType, const ConstructData& constructData, const ArgList& args)
+JSObject* construct(ExecState* exec, JSValue object, ConstructType constructType, const ConstructData& constructData, const ArgList& args)
 {
     if (constructType == ConstructTypeHost)
-        return constructData.native.function(exec, asObject(callee), args);
+        return constructData.native.function(exec, asObject(object), args);
     ASSERT(constructType == ConstructTypeJS);
     // FIXME: Can this be done more efficiently using the constructData?
-    return asFunction(callee)->construct(exec, args);
+    return asFunction(object)->construct(exec, args);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.h
index 1dcfb00..9298f51 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ConstructData.h
@@ -70,7 +70,7 @@ namespace JSC {
     };
 #endif
 
-#if defined(QT_BUILD_SCRIPT_LIB) && PLATFORM(SOLARIS)
+#if defined(QT_BUILD_SCRIPT_LIB) && OS(SOLARIS)
     struct
 #else
     union
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.cpp
index 1879c3f..2e476b3 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.cpp
@@ -35,7 +35,7 @@
 #include <wtf/DateMath.h>
 #include <wtf/MathExtras.h>
 
-#if PLATFORM(WINCE) && !PLATFORM(QT)
+#if OS(WINCE) && !PLATFORM(QT)
 extern "C" time_t time(time_t* timer); // Provided by libce.
 #endif
 
@@ -57,7 +57,7 @@ static JSValue JSC_HOST_CALL dateParse(ExecState*, JSObject*, JSValue, const Arg
 static JSValue JSC_HOST_CALL dateNow(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL dateUTC(ExecState*, JSObject*, JSValue, const ArgList&);
 
-DateConstructor::DateConstructor(ExecState* exec, PassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, DatePrototype* datePrototype)
+DateConstructor::DateConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, DatePrototype* datePrototype)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, datePrototype->classInfo()->className))
 {
       putDirectWithoutTransition(exec->propertyNames().prototype, datePrototype, DontEnum|DontDelete|ReadOnly);
@@ -77,14 +77,14 @@ JSObject* constructDate(ExecState* exec, const ArgList& args)
     double value;
 
     if (numArgs == 0) // new Date() ECMA 15.9.3.3
-        value = getCurrentUTCTime();
+        value = jsCurrentTime();
     else if (numArgs == 1) {
         if (args.at(0).inherits(&DateInstance::info))
             value = asDateInstance(args.at(0))->internalNumber();
         else {
             JSValue primitive = args.at(0).toPrimitive(exec);
             if (primitive.isString())
-                value = parseDate(primitive.getString());
+                value = parseDate(exec, primitive.getString(exec));
             else
                 value = primitive.toNumber(exec);
         }
@@ -108,13 +108,11 @@ JSObject* constructDate(ExecState* exec, const ArgList& args)
             t.second = args.at(5).toInt32(exec);
             t.isDST = -1;
             double ms = (numArgs >= 7) ? args.at(6).toNumber(exec) : 0;
-            value = gregorianDateTimeToMS(t, ms, false);
+            value = gregorianDateTimeToMS(exec, t, ms, false);
         }
     }
 
-    DateInstance* result = new (exec) DateInstance(exec->lexicalGlobalObject()->dateStructure());
-    result->setInternalValue(jsNumber(exec, timeClip(value)));
-    return result;
+    return new (exec) DateInstance(exec, value);
 }
     
 static JSObject* constructWithDateConstructor(ExecState* exec, JSObject*, const ArgList& args)
@@ -134,8 +132,12 @@ static JSValue JSC_HOST_CALL callDate(ExecState* exec, JSObject*, JSValue, const
     time_t localTime = time(0);
     tm localTM;
     getLocalTime(&localTime, &localTM);
-    GregorianDateTime ts(localTM);
-    return jsNontrivialString(exec, formatDate(ts) + " " + formatTime(ts, false));
+    GregorianDateTime ts(exec, localTM);
+    DateConversionBuffer date;
+    DateConversionBuffer time;
+    formatDate(ts, date);
+    formatTime(ts, time);
+    return jsNontrivialString(exec, makeString(date, " ", time));
 }
 
 CallType DateConstructor::getCallData(CallData& callData)
@@ -146,12 +148,12 @@ CallType DateConstructor::getCallData(CallData& callData)
 
 static JSValue JSC_HOST_CALL dateParse(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, parseDate(args.at(0).toString(exec)));
+    return jsNumber(exec, parseDate(exec, args.at(0).toString(exec)));
 }
 
 static JSValue JSC_HOST_CALL dateNow(ExecState* exec, JSObject*, JSValue, const ArgList&)
 {
-    return jsNumber(exec, getCurrentUTCTime());
+    return jsNumber(exec, jsCurrentTime());
 }
 
 static JSValue JSC_HOST_CALL dateUTC(ExecState* exec, JSObject*, JSValue, const ArgList& args) 
@@ -175,7 +177,7 @@ static JSValue JSC_HOST_CALL dateUTC(ExecState* exec, JSObject*, JSValue, const
     t.minute = args.at(4).toInt32(exec);
     t.second = args.at(5).toInt32(exec);
     double ms = (n >= 7) ? args.at(6).toNumber(exec) : 0;
-    return jsNumber(exec, gregorianDateTimeToMS(t, ms, true));
+    return jsNumber(exec, gregorianDateTimeToMS(exec, t, ms, true));
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.h
index dcef3cc..10e450e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConstructor.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class DateConstructor : public InternalFunction {
     public:
-        DateConstructor(ExecState*, PassRefPtr<Structure>, Structure* prototypeFunctionStructure, DatePrototype*);
+        DateConstructor(ExecState*, NonNullPassRefPtr<Structure>, Structure* prototypeFunctionStructure, DatePrototype*);
 
     private:
         virtual ConstructType getConstructData(ConstructData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.cpp
index a725478..f129407 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.cpp
@@ -43,6 +43,7 @@
 #include "config.h"
 #include "DateConversion.h"
 
+#include "CallFrame.h"
 #include "UString.h"
 #include <wtf/DateMath.h>
 #include <wtf/StringExtras.h>
@@ -51,51 +52,51 @@ using namespace WTF;
 
 namespace JSC {
 
-double parseDate(const UString &date)
+double parseDate(ExecState* exec, const UString &date)
 {
-    return parseDateFromNullTerminatedCharacters(date.UTF8String().c_str());
+    if (date == exec->globalData().cachedDateString)
+        return exec->globalData().cachedDateStringValue;
+    double value = parseDateFromNullTerminatedCharacters(exec, date.UTF8String().c_str());
+    exec->globalData().cachedDateString = date;
+    exec->globalData().cachedDateStringValue = value;
+    return value;
 }
 
-UString formatDate(const GregorianDateTime &t)
+void formatDate(const GregorianDateTime &t, DateConversionBuffer& buffer)
 {
-    char buffer[100];
-    snprintf(buffer, sizeof(buffer), "%s %s %02d %04d",
+    snprintf(buffer, DateConversionBufferSize, "%s %s %02d %04d",
         weekdayName[(t.weekDay + 6) % 7],
         monthName[t.month], t.monthDay, t.year + 1900);
-    return buffer;
 }
 
-UString formatDateUTCVariant(const GregorianDateTime &t)
+void formatDateUTCVariant(const GregorianDateTime &t, DateConversionBuffer& buffer)
 {
-    char buffer[100];
-    snprintf(buffer, sizeof(buffer), "%s, %02d %s %04d",
+    snprintf(buffer, DateConversionBufferSize, "%s, %02d %s %04d",
         weekdayName[(t.weekDay + 6) % 7],
         t.monthDay, monthName[t.month], t.year + 1900);
-    return buffer;
 }
 
-UString formatTime(const GregorianDateTime &t, bool utc)
+void formatTime(const GregorianDateTime &t, DateConversionBuffer& buffer)
 {
-    char buffer[100];
-    if (utc) {
-        snprintf(buffer, sizeof(buffer), "%02d:%02d:%02d GMT", t.hour, t.minute, t.second);
-    } else {
-        int offset = abs(gmtoffset(t));
-        char timeZoneName[70];
-        struct tm gtm = t;
-        strftime(timeZoneName, sizeof(timeZoneName), "%Z", &gtm);
+    int offset = abs(gmtoffset(t));
+    char timeZoneName[70];
+    struct tm gtm = t;
+    strftime(timeZoneName, sizeof(timeZoneName), "%Z", &gtm);
 
-        if (timeZoneName[0]) {
-            snprintf(buffer, sizeof(buffer), "%02d:%02d:%02d GMT%c%02d%02d (%s)",
-                t.hour, t.minute, t.second,
-                gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60, timeZoneName);
-        } else {
-            snprintf(buffer, sizeof(buffer), "%02d:%02d:%02d GMT%c%02d%02d",
-                t.hour, t.minute, t.second,
-                gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60);
-        }
+    if (timeZoneName[0]) {
+        snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT%c%02d%02d (%s)",
+            t.hour, t.minute, t.second,
+            gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60, timeZoneName);
+    } else {
+        snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT%c%02d%02d",
+            t.hour, t.minute, t.second,
+            gmtoffset(t) < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60);
     }
-    return UString(buffer);
+}
+
+void formatTimeUTC(const GregorianDateTime &t, DateConversionBuffer& buffer)
+{
+    snprintf(buffer, DateConversionBufferSize, "%02d:%02d:%02d GMT", t.hour, t.minute, t.second);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.h
index 0d12815..ff32b50 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateConversion.h
@@ -42,18 +42,21 @@
 #ifndef DateConversion_h
 #define DateConversion_h
 
-namespace WTF {
-    struct GregorianDateTime;
-}
+#include "UString.h"
 
 namespace JSC {
 
-class UString;
+class ExecState;
+struct GregorianDateTime;
 
-double parseDate(const UString&);
-UString formatDate(const WTF::GregorianDateTime&);
-UString formatDateUTCVariant(const WTF::GregorianDateTime&);
-UString formatTime(const WTF::GregorianDateTime&, bool inputIsUTC);
+static const unsigned DateConversionBufferSize = 100;
+typedef char DateConversionBuffer[DateConversionBufferSize];
+
+double parseDate(ExecState* exec, const UString&);
+void formatDate(const GregorianDateTime&, DateConversionBuffer&);
+void formatDateUTCVariant(const GregorianDateTime&, DateConversionBuffer&);
+void formatTime(const GregorianDateTime&, DateConversionBuffer&);
+void formatTimeUTC(const GregorianDateTime&, DateConversionBuffer&);
 
 } // namespace JSC
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.cpp
index 62791ae..77a92be 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.cpp
@@ -22,6 +22,8 @@
 #include "config.h"
 #include "DateInstance.h"
 
+#include "JSGlobalObject.h"
+
 #include <math.h>
 #include <wtf/DateMath.h>
 #include <wtf/MathExtras.h>
@@ -30,89 +32,50 @@ using namespace WTF;
 
 namespace JSC {
 
-struct DateInstance::Cache {
-    double m_gregorianDateTimeCachedForMS;
-    GregorianDateTime m_cachedGregorianDateTime;
-    double m_gregorianDateTimeUTCCachedForMS;
-    GregorianDateTime m_cachedGregorianDateTimeUTC;
-};
-
 const ClassInfo DateInstance::info = {"Date", 0, 0, 0};
 
-DateInstance::DateInstance(PassRefPtr<Structure> structure)
+DateInstance::DateInstance(ExecState* exec, NonNullPassRefPtr<Structure> structure)
     : JSWrapperObject(structure)
-    , m_cache(0)
 {
+    setInternalValue(jsNaN(exec));
 }
 
-DateInstance::~DateInstance()
+DateInstance::DateInstance(ExecState* exec, double time)
+    : JSWrapperObject(exec->lexicalGlobalObject()->dateStructure())
 {
-    delete m_cache;
+    setInternalValue(jsNumber(exec, timeClip(time)));
 }
 
-void DateInstance::msToGregorianDateTime(double milli, bool outputIsUTC, GregorianDateTime& t) const
-{
-    if (!m_cache) {
-        m_cache = new Cache;
-        m_cache->m_gregorianDateTimeCachedForMS = NaN;
-        m_cache->m_gregorianDateTimeUTCCachedForMS = NaN;
-    }
-
-    if (outputIsUTC) {
-        if (m_cache->m_gregorianDateTimeUTCCachedForMS != milli) {
-            WTF::msToGregorianDateTime(milli, true, m_cache->m_cachedGregorianDateTimeUTC);
-            m_cache->m_gregorianDateTimeUTCCachedForMS = milli;
-        }
-        t.copyFrom(m_cache->m_cachedGregorianDateTimeUTC);
-    } else {
-        if (m_cache->m_gregorianDateTimeCachedForMS != milli) {
-            WTF::msToGregorianDateTime(milli, false, m_cache->m_cachedGregorianDateTime);
-            m_cache->m_gregorianDateTimeCachedForMS = milli;
-        }
-        t.copyFrom(m_cache->m_cachedGregorianDateTime);
-    }
-}
-
-bool DateInstance::getTime(GregorianDateTime& t, int& offset) const
+const GregorianDateTime* DateInstance::calculateGregorianDateTime(ExecState* exec) const
 {
     double milli = internalNumber();
     if (isnan(milli))
-        return false;
-    
-    msToGregorianDateTime(milli, false, t);
-    offset = gmtoffset(t);
-    return true;
+        return 0;
+
+    if (!m_data)
+        m_data = exec->globalData().dateInstanceCache.add(milli);
+
+    if (m_data->m_gregorianDateTimeCachedForMS != milli) {
+        msToGregorianDateTime(exec, milli, false, m_data->m_cachedGregorianDateTime);
+        m_data->m_gregorianDateTimeCachedForMS = milli;
+    }
+    return &m_data->m_cachedGregorianDateTime;
 }
 
-bool DateInstance::getUTCTime(GregorianDateTime& t) const
+const GregorianDateTime* DateInstance::calculateGregorianDateTimeUTC(ExecState* exec) const
 {
     double milli = internalNumber();
     if (isnan(milli))
-        return false;
-    
-    msToGregorianDateTime(milli, true, t);
-    return true;
-}
+        return 0;
 
-bool DateInstance::getTime(double& milli, int& offset) const
-{
-    milli = internalNumber();
-    if (isnan(milli))
-        return false;
-    
-    GregorianDateTime t;
-    msToGregorianDateTime(milli, false, t);
-    offset = gmtoffset(t);
-    return true;
-}
+    if (!m_data)
+        m_data = exec->globalData().dateInstanceCache.add(milli);
 
-bool DateInstance::getUTCTime(double& milli) const
-{
-    milli = internalNumber();
-    if (isnan(milli))
-        return false;
-    
-    return true;
+    if (m_data->m_gregorianDateTimeUTCCachedForMS != milli) {
+        msToGregorianDateTime(exec, milli, true, m_data->m_cachedGregorianDateTimeUTC);
+        m_data->m_gregorianDateTimeUTCCachedForMS = milli;
+    }
+    return &m_data->m_cachedGregorianDateTimeUTC;
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.h
index 3b73521..44b7521 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstance.h
@@ -31,27 +31,41 @@ namespace JSC {
 
     class DateInstance : public JSWrapperObject {
     public:
-        explicit DateInstance(PassRefPtr<Structure>);
-        virtual ~DateInstance();
+        DateInstance(ExecState*, double);
+        explicit DateInstance(ExecState*, NonNullPassRefPtr<Structure>);
 
         double internalNumber() const { return internalValue().uncheckedGetNumber(); }
 
-        bool getTime(WTF::GregorianDateTime&, int& offset) const;
-        bool getUTCTime(WTF::GregorianDateTime&) const;
-        bool getTime(double& milliseconds, int& offset) const;
-        bool getUTCTime(double& milliseconds) const;
-
-        static const ClassInfo info;
-
-        void msToGregorianDateTime(double, bool outputIsUTC, WTF::GregorianDateTime&) const;
+        static JS_EXPORTDATA const ClassInfo info;
+
+        const GregorianDateTime* gregorianDateTime(ExecState* exec) const
+        {
+            if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())
+                return &m_data->m_cachedGregorianDateTime;
+            return calculateGregorianDateTime(exec);
+        }
+        
+        const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const
+        {
+            if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())
+                return &m_data->m_cachedGregorianDateTimeUTC;
+            return calculateGregorianDateTimeUTC(exec);
+        }
+
+        static PassRefPtr<Structure> createStructure(JSValue prototype)
+        {
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
+        }
+
+    protected:
+        static const unsigned StructureFlags = OverridesMarkChildren | JSWrapperObject::StructureFlags;
 
     private:
+        const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;
+        const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;
         virtual const ClassInfo* classInfo() const { return &info; }
 
-        using JSWrapperObject::internalValue;
-
-        struct Cache;
-        mutable Cache* m_cache;
+        mutable RefPtr<DateInstanceData> m_data;
     };
 
     DateInstance* asDateInstance(JSValue);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstanceCache.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstanceCache.h
new file mode 100644
index 0000000..d208580
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DateInstanceCache.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef DateInstanceCache_h
+#define DateInstanceCache_h
+
+#include <wtf/DateMath.h>
+#include <wtf/HashFunctions.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace JSC {
+
+    extern const double NaN;
+
+    class DateInstanceData : public RefCounted<DateInstanceData> {
+    public:
+        static PassRefPtr<DateInstanceData> create() { return adoptRef(new DateInstanceData); }
+
+        double m_gregorianDateTimeCachedForMS;
+        GregorianDateTime m_cachedGregorianDateTime;
+        double m_gregorianDateTimeUTCCachedForMS;
+        GregorianDateTime m_cachedGregorianDateTimeUTC;
+
+    private:
+        DateInstanceData()
+            : m_gregorianDateTimeCachedForMS(NaN)
+            , m_gregorianDateTimeUTCCachedForMS(NaN)
+        {
+        }
+    };
+
+    class DateInstanceCache {
+    public:
+        DateInstanceCache()
+        {
+            reset();
+        }
+        
+        void reset()
+        {
+            for (size_t i = 0; i < cacheSize; ++i)
+                m_cache[i].key = NaN;
+        }
+        
+        DateInstanceData* add(double d)
+        {
+            CacheEntry& entry = lookup(d);
+            if (d == entry.key)
+                return entry.value.get();
+
+            entry.key = d;
+            entry.value = DateInstanceData::create();
+            return entry.value.get();
+        }
+
+    private:
+        static const size_t cacheSize = 16;
+
+        struct CacheEntry {
+            double key;
+            RefPtr<DateInstanceData> value;
+        };
+
+        CacheEntry& lookup(double d) { return m_cache[WTF::FloatHash<double>::hash(d) & (cacheSize - 1)]; }
+
+        CacheEntry m_cache[cacheSize];
+    };
+
+} // namespace JSC
+
+#endif // DateInstanceCache_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.cpp
index c6f7dec..ca9d4ea 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.cpp
@@ -28,7 +28,6 @@
 #include "JSString.h"
 #include "ObjectPrototype.h"
 #include "DateInstance.h"
-#include <float.h>
 
 #if !PLATFORM(MAC) && HAVE(LANGINFO_H)
 #include <langinfo.h>
@@ -60,7 +59,7 @@
 #include <CoreFoundation/CoreFoundation.h>
 #endif
 
-#if PLATFORM(WINCE) && !PLATFORM(QT)
+#if OS(WINCE) && !PLATFORM(QT)
 extern "C" size_t strftime(char * const s, const size_t maxsize, const char * const format, const struct tm * const t); //provided by libce
 #endif
 
@@ -198,7 +197,7 @@ static JSCell* formatLocaleDate(ExecState* exec, const GregorianDateTime& gdt, L
 {
 #if HAVE(LANGINFO_H)
     static const nl_item formats[] = { D_T_FMT, D_FMT, T_FMT };
-#elif (PLATFORM(WINCE) && !PLATFORM(QT)) || PLATFORM(SYMBIAN)
+#elif (OS(WINCE) && !PLATFORM(QT)) || OS(SYMBIAN)
      // strftime() does not support '#' on WinCE or Symbian
     static const char* const formatStrings[] = { "%c", "%x", "%X" };
 #else
@@ -251,12 +250,12 @@ static JSCell* formatLocaleDate(ExecState* exec, const GregorianDateTime& gdt, L
     return jsNontrivialString(exec, timebuffer);
 }
 
-static JSCell* formatLocaleDate(ExecState* exec, DateInstance* dateObject, double timeInMilliseconds, LocaleDateTimeFormat format, const ArgList&)
+static JSCell* formatLocaleDate(ExecState* exec, DateInstance* dateObject, double, LocaleDateTimeFormat format, const ArgList&)
 {
-    GregorianDateTime gregorianDateTime;
-    const bool notUTC = false;
-    dateObject->msToGregorianDateTime(timeInMilliseconds, notUTC, gregorianDateTime);
-    return formatLocaleDate(exec, gregorianDateTime, format);
+    const GregorianDateTime* gregorianDateTime = dateObject->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNontrivialString(exec, "Invalid Date");
+    return formatLocaleDate(exec, *gregorianDateTime, format);
 }
 
 #endif // !PLATFORM(MAC)
@@ -395,10 +394,9 @@ const ClassInfo DatePrototype::info = {"Date", &DateInstance::info, 0, ExecState
 
 // ECMA 15.9.4
 
-DatePrototype::DatePrototype(ExecState* exec, PassRefPtr<Structure> structure)
-    : DateInstance(structure)
+DatePrototype::DatePrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure)
+    : DateInstance(exec, structure)
 {
-    setInternalValue(jsNaN(exec));
     // The constructor will be added later, after DateConstructor has been built.
 }
 
@@ -420,16 +418,16 @@ JSValue JSC_HOST_CALL dateProtoFuncToString(ExecState* exec, JSObject*, JSValue
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNontrivialString(exec, formatDate(t) + " " + formatTime(t, utc));
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNontrivialString(exec, "Invalid Date");
+    DateConversionBuffer date;
+    DateConversionBuffer time;
+    formatDate(*gregorianDateTime, date);
+    formatTime(*gregorianDateTime, time);
+    return jsNontrivialString(exec, makeString(date, " ", time));
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToUTCString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -437,16 +435,16 @@ JSValue JSC_HOST_CALL dateProtoFuncToUTCString(ExecState* exec, JSObject*, JSVal
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNontrivialString(exec, formatDateUTCVariant(t) + " " + formatTime(t, utc));
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNontrivialString(exec, "Invalid Date");
+    DateConversionBuffer date;
+    DateConversionBuffer time;
+    formatDateUTCVariant(*gregorianDateTime, date);
+    formatTimeUTC(*gregorianDateTime, time);
+    return jsNontrivialString(exec, makeString(date, " ", time));
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToISOString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -454,19 +452,15 @@ JSValue JSC_HOST_CALL dateProtoFuncToISOString(ExecState* exec, JSObject*, JSVal
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
     
-    const bool utc = true;
-    
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (!isfinite(milli))
-        return jsNontrivialString(exec, "Invalid Date");
     
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNontrivialString(exec, "Invalid Date");
     // Maximum amount of space we need in buffer: 6 (max. digits in year) + 2 * 5 (2 characters each for month, day, hour, minute, second) + 4 (. + 3 digits for milliseconds)
     // 6 for formatting and one for null termination = 27.  We add one extra character to allow us to force null termination.
     char buffer[28];
-    snprintf(buffer, sizeof(buffer) - 1, "%04d-%02d-%02dT%02d:%02d:%02d.%03dZ", 1900 + t.year, t.month + 1, t.monthDay, t.hour, t.minute, t.second, static_cast<int>(fmod(milli, 1000)));
+    snprintf(buffer, sizeof(buffer) - 1, "%04d-%02d-%02dT%02d:%02d:%02d.%03dZ", 1900 + gregorianDateTime->year, gregorianDateTime->month + 1, gregorianDateTime->monthDay, gregorianDateTime->hour, gregorianDateTime->minute, gregorianDateTime->second, static_cast<int>(fmod(thisDateObj->internalNumber(), 1000)));
     buffer[sizeof(buffer) - 1] = 0;
     return jsNontrivialString(exec, buffer);
 }
@@ -476,16 +470,14 @@ JSValue JSC_HOST_CALL dateProtoFuncToDateString(ExecState* exec, JSObject*, JSVa
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNontrivialString(exec, formatDate(t));
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNontrivialString(exec, "Invalid Date");
+    DateConversionBuffer date;
+    formatDate(*gregorianDateTime, date);
+    return jsNontrivialString(exec, date);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToTimeString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -493,16 +485,14 @@ JSValue JSC_HOST_CALL dateProtoFuncToTimeString(ExecState* exec, JSObject*, JSVa
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNontrivialString(exec, formatTime(t, utc));
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNontrivialString(exec, "Invalid Date");
+    DateConversionBuffer time;
+    formatTime(*gregorianDateTime, time);
+    return jsNontrivialString(exec, time);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToLocaleString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -511,11 +501,7 @@ JSValue JSC_HOST_CALL dateProtoFuncToLocaleString(ExecState* exec, JSObject*, JS
         return throwError(exec, TypeError);
 
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
-
-    return formatLocaleDate(exec, thisDateObj, milli, LocaleDateAndTime, args);
+    return formatLocaleDate(exec, thisDateObj, thisDateObj->internalNumber(), LocaleDateAndTime, args);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToLocaleDateString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -524,11 +510,7 @@ JSValue JSC_HOST_CALL dateProtoFuncToLocaleDateString(ExecState* exec, JSObject*
         return throwError(exec, TypeError);
 
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
-
-    return formatLocaleDate(exec, thisDateObj, milli, LocaleDate, args);
+    return formatLocaleDate(exec, thisDateObj, thisDateObj->internalNumber(), LocaleDate, args);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToLocaleTimeString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -537,11 +519,7 @@ JSValue JSC_HOST_CALL dateProtoFuncToLocaleTimeString(ExecState* exec, JSObject*
         return throwError(exec, TypeError);
 
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
-
-    return formatLocaleDate(exec, thisDateObj, milli, LocaleTime, args);
+    return formatLocaleDate(exec, thisDateObj, thisDateObj->internalNumber(), LocaleTime, args);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetTime(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -549,12 +527,7 @@ JSValue JSC_HOST_CALL dateProtoFuncGetTime(ExecState* exec, JSObject*, JSValue t
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
-
-    return jsNumber(exec, milli);
+    return asDateInstance(thisValue)->internalValue(); 
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetFullYear(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -562,16 +535,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetFullYear(ExecState* exec, JSObject*, JSVal
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, 1900 + t.year);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, 1900 + gregorianDateTime->year);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetUTCFullYear(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -579,16 +548,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetUTCFullYear(ExecState* exec, JSObject*, JS
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, 1900 + t.year);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, 1900 + gregorianDateTime->year);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToGMTString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -596,16 +561,16 @@ JSValue JSC_HOST_CALL dateProtoFuncToGMTString(ExecState* exec, JSObject*, JSVal
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNontrivialString(exec, "Invalid Date");
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNontrivialString(exec, formatDateUTCVariant(t) + " " + formatTime(t, utc));
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNontrivialString(exec, "Invalid Date");
+    DateConversionBuffer date;
+    DateConversionBuffer time;
+    formatDateUTCVariant(*gregorianDateTime, date);
+    formatTimeUTC(*gregorianDateTime, time);
+    return jsNontrivialString(exec, makeString(date, " ", time));
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetMonth(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -613,16 +578,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetMonth(ExecState* exec, JSObject*, JSValue
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.month);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->month);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetUTCMonth(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -630,16 +591,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetUTCMonth(ExecState* exec, JSObject*, JSVal
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.month);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->month);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetDate(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -647,16 +604,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetDate(ExecState* exec, JSObject*, JSValue t
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.monthDay);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->monthDay);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetUTCDate(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -664,16 +617,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetUTCDate(ExecState* exec, JSObject*, JSValu
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.monthDay);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->monthDay);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetDay(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -681,16 +630,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetDay(ExecState* exec, JSObject*, JSValue th
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.weekDay);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->weekDay);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetUTCDay(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -698,16 +643,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetUTCDay(ExecState* exec, JSObject*, JSValue
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.weekDay);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->weekDay);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetHours(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -715,16 +656,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetHours(ExecState* exec, JSObject*, JSValue
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.hour);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->hour);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetUTCHours(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -732,16 +669,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetUTCHours(ExecState* exec, JSObject*, JSVal
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.hour);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->hour);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetMinutes(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -749,16 +682,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetMinutes(ExecState* exec, JSObject*, JSValu
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.minute);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->minute);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetUTCMinutes(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -766,16 +695,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetUTCMinutes(ExecState* exec, JSObject*, JSV
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.minute);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->minute);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetSeconds(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -783,16 +708,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetSeconds(ExecState* exec, JSObject*, JSValu
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.second);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->second);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetUTCSeconds(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -800,16 +721,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetUTCSeconds(ExecState* exec, JSObject*, JSV
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = true;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, t.second);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTimeUTC(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, gregorianDateTime->second);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncGetMilliSeconds(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
@@ -847,16 +764,12 @@ JSValue JSC_HOST_CALL dateProtoFuncGetTimezoneOffset(ExecState* exec, JSObject*,
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
-    return jsNumber(exec, -gmtoffset(t) / minutesPerHour);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
+    return jsNumber(exec, -gregorianDateTime->utcOffset / minutesPerHour);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncSetTime(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -889,16 +802,21 @@ static JSValue setNewValueFromTimeArgs(ExecState* exec, JSValue thisValue, const
     double secs = floor(milli / msPerSecond);
     double ms = milli - secs * msPerSecond;
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, inputIsUTC, t);
+    const GregorianDateTime* other = inputIsUTC 
+        ? thisDateObj->gregorianDateTimeUTC(exec)
+        : thisDateObj->gregorianDateTime(exec);
+    if (!other)
+        return jsNaN(exec);
 
-    if (!fillStructuresUsingTimeArgs(exec, args, numArgsToUse, &ms, &t)) {
+    GregorianDateTime gregorianDateTime;
+    gregorianDateTime.copyFrom(*other);
+    if (!fillStructuresUsingTimeArgs(exec, args, numArgsToUse, &ms, &gregorianDateTime)) {
         JSValue result = jsNaN(exec);
         thisDateObj->setInternalValue(result);
         return result;
     } 
     
-    JSValue result = jsNumber(exec, gregorianDateTimeToMS(t, ms, inputIsUTC));
+    JSValue result = jsNumber(exec, gregorianDateTimeToMS(exec, gregorianDateTime, ms, inputIsUTC));
     thisDateObj->setInternalValue(result);
     return result;
 }
@@ -916,26 +834,28 @@ static JSValue setNewValueFromDateArgs(ExecState* exec, JSValue thisValue, const
     }      
     
     double milli = thisDateObj->internalNumber();
-    double ms = 0;
-
-    GregorianDateTime t;
-    if (numArgsToUse == 3 && isnan(milli))
-        // Based on ECMA 262 15.9.5.40 - .41 (set[UTC]FullYear)
-        // the time must be reset to +0 if it is NaN. 
-        thisDateObj->msToGregorianDateTime(0, true, t);
-    else {
-        double secs = floor(milli / msPerSecond);
-        ms = milli - secs * msPerSecond;
-        thisDateObj->msToGregorianDateTime(milli, inputIsUTC, t);
+    double ms = 0; 
+
+    GregorianDateTime gregorianDateTime; 
+    if (numArgsToUse == 3 && isnan(milli)) 
+        msToGregorianDateTime(exec, 0, true, gregorianDateTime); 
+    else { 
+        ms = milli - floor(milli / msPerSecond) * msPerSecond; 
+        const GregorianDateTime* other = inputIsUTC 
+            ? thisDateObj->gregorianDateTimeUTC(exec)
+            : thisDateObj->gregorianDateTime(exec);
+        if (!other)
+            return jsNaN(exec);
+        gregorianDateTime.copyFrom(*other);
     }
     
-    if (!fillStructuresUsingDateArgs(exec, args, numArgsToUse, &ms, &t)) {
+    if (!fillStructuresUsingDateArgs(exec, args, numArgsToUse, &ms, &gregorianDateTime)) {
         JSValue result = jsNaN(exec);
         thisDateObj->setInternalValue(result);
         return result;
     } 
            
-    JSValue result = jsNumber(exec, gregorianDateTimeToMS(t, ms, inputIsUTC));
+    JSValue result = jsNumber(exec, gregorianDateTimeToMS(exec, gregorianDateTime, ms, inputIsUTC));
     thisDateObj->setInternalValue(result);
     return result;
 }
@@ -1029,8 +949,6 @@ JSValue JSC_HOST_CALL dateProtoFuncSetYear(ExecState* exec, JSObject*, JSValue t
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue);     
     if (args.isEmpty()) { 
         JSValue result = jsNaN(exec);
@@ -1041,15 +959,16 @@ JSValue JSC_HOST_CALL dateProtoFuncSetYear(ExecState* exec, JSObject*, JSValue t
     double milli = thisDateObj->internalNumber();
     double ms = 0;
 
-    GregorianDateTime t;
+    GregorianDateTime gregorianDateTime;
     if (isnan(milli))
         // Based on ECMA 262 B.2.5 (setYear)
         // the time must be reset to +0 if it is NaN. 
-        thisDateObj->msToGregorianDateTime(0, true, t);
+        msToGregorianDateTime(exec, 0, true, gregorianDateTime);
     else {   
         double secs = floor(milli / msPerSecond);
         ms = milli - secs * msPerSecond;
-        thisDateObj->msToGregorianDateTime(milli, utc, t);
+        if (const GregorianDateTime* other = thisDateObj->gregorianDateTime(exec))
+            gregorianDateTime.copyFrom(*other);
     }
     
     bool ok = true;
@@ -1060,8 +979,8 @@ JSValue JSC_HOST_CALL dateProtoFuncSetYear(ExecState* exec, JSObject*, JSValue t
         return result;
     }
             
-    t.year = (year > 99 || year < 0) ? year - 1900 : year;
-    JSValue result = jsNumber(exec, gregorianDateTimeToMS(t, ms, utc));
+    gregorianDateTime.year = (year > 99 || year < 0) ? year - 1900 : year;
+    JSValue result = jsNumber(exec, gregorianDateTimeToMS(exec, gregorianDateTime, ms, false));
     thisDateObj->setInternalValue(result);
     return result;
 }
@@ -1071,18 +990,14 @@ JSValue JSC_HOST_CALL dateProtoFuncGetYear(ExecState* exec, JSObject*, JSValue t
     if (!thisValue.inherits(&DateInstance::info))
         return throwError(exec, TypeError);
 
-    const bool utc = false;
-
     DateInstance* thisDateObj = asDateInstance(thisValue); 
-    double milli = thisDateObj->internalNumber();
-    if (isnan(milli))
-        return jsNaN(exec);
 
-    GregorianDateTime t;
-    thisDateObj->msToGregorianDateTime(milli, utc, t);
+    const GregorianDateTime* gregorianDateTime = thisDateObj->gregorianDateTime(exec);
+    if (!gregorianDateTime)
+        return jsNaN(exec);
 
     // NOTE: IE returns the full year even in getYear.
-    return jsNumber(exec, t.year);
+    return jsNumber(exec, gregorianDateTime->year);
 }
 
 JSValue JSC_HOST_CALL dateProtoFuncToJSON(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.h
index 12fabda..f565775 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/DatePrototype.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class DatePrototype : public DateInstance {
     public:
-        DatePrototype(ExecState*, PassRefPtr<Structure>);
+        DatePrototype(ExecState*, NonNullPassRefPtr<Structure>);
 
         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
@@ -39,8 +39,12 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
+
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | DateInstance::StructureFlags;
+
     };
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.cpp
index 07b7e23..b9c3f58 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.cpp
@@ -29,7 +29,7 @@ namespace JSC {
 
 ASSERT_CLASS_FITS_IN_CELL(ErrorConstructor);
 
-ErrorConstructor::ErrorConstructor(ExecState* exec, PassRefPtr<Structure> structure, ErrorPrototype* errorPrototype)
+ErrorConstructor::ErrorConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, ErrorPrototype* errorPrototype)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, errorPrototype->classInfo()->className))
 {
     // ECMA 15.11.3.1 Error.prototype
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.h
index 2dd4124..e3d789b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorConstructor.h
@@ -30,7 +30,7 @@ namespace JSC {
 
     class ErrorConstructor : public InternalFunction {
     public:
-        ErrorConstructor(ExecState*, PassRefPtr<Structure>, ErrorPrototype*);
+        ErrorConstructor(ExecState*, NonNullPassRefPtr<Structure>, ErrorPrototype*);
 
     private:
         virtual ConstructType getConstructData(ConstructData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.cpp
index 2e2cdce..1cdb87a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.cpp
@@ -25,7 +25,7 @@ namespace JSC {
 
 const ClassInfo ErrorInstance::info = { "Error", 0, 0, 0 };
 
-ErrorInstance::ErrorInstance(PassRefPtr<Structure> structure)
+ErrorInstance::ErrorInstance(NonNullPassRefPtr<Structure> structure)
     : JSObject(structure)
 {
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.h
index 6f9d262..9f53b51 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorInstance.h
@@ -27,7 +27,7 @@ namespace JSC {
 
     class ErrorInstance : public JSObject {
     public:
-        explicit ErrorInstance(PassRefPtr<Structure>);
+        explicit ErrorInstance(NonNullPassRefPtr<Structure>);
 
         virtual const ClassInfo* classInfo() const { return &info; }
         static const ClassInfo info;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.cpp
index 599390e..be9e4b8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.cpp
@@ -34,7 +34,7 @@ ASSERT_CLASS_FITS_IN_CELL(ErrorPrototype);
 static JSValue JSC_HOST_CALL errorProtoFuncToString(ExecState*, JSObject*, JSValue, const ArgList&);
 
 // ECMA 15.9.4
-ErrorPrototype::ErrorPrototype(ExecState* exec, PassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
+ErrorPrototype::ErrorPrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
     : ErrorInstance(structure)
 {
     // The constructor will be added later in ErrorConstructor's constructor
@@ -48,21 +48,19 @@ ErrorPrototype::ErrorPrototype(ExecState* exec, PassRefPtr<Structure> structure,
 JSValue JSC_HOST_CALL errorProtoFuncToString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     JSObject* thisObj = thisValue.toThisObject(exec);
+    JSValue name = thisObj->get(exec, exec->propertyNames().name);
+    JSValue message = thisObj->get(exec, exec->propertyNames().message);
 
-    UString s = "Error";
+    // Mozilla-compatible format.
 
-    JSValue v = thisObj->get(exec, exec->propertyNames().name);
-    if (!v.isUndefined())
-        s = v.toString(exec);
-
-    v = thisObj->get(exec, exec->propertyNames().message);
-    if (!v.isUndefined()) {
-        // Mozilla-compatible format.
-        s += ": ";
-        s += v.toString(exec);
+    if (!name.isUndefined()) {
+        if (!message.isUndefined())
+            return jsNontrivialString(exec, makeString(name.toString(exec), ": ", message.toString(exec)));
+        return jsNontrivialString(exec, name.toString(exec));
     }
-
-    return jsNontrivialString(exec, s);
+    if (!message.isUndefined())
+        return jsNontrivialString(exec, makeString("Error: ", message.toString(exec)));
+    return jsNontrivialString(exec, "Error");
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.h
index 53d12d9..a561590 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ErrorPrototype.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class ErrorPrototype : public ErrorInstance {
     public:
-        ErrorPrototype(ExecState*, PassRefPtr<Structure>, Structure* prototypeFunctionStructure);
+        ErrorPrototype(ExecState*, NonNullPassRefPtr<Structure>, Structure* prototypeFunctionStructure);
     };
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.cpp
index cc18b95..9bb740e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.cpp
@@ -66,15 +66,18 @@ JSValue createStackOverflowError(ExecState* exec)
     return createError(exec, RangeError, "Maximum call stack size exceeded.");
 }
 
+JSValue createTypeError(ExecState* exec, const char* message)
+{
+    return createError(exec, TypeError, message);
+}
+
 JSValue createUndefinedVariableError(ExecState* exec, const Identifier& ident, unsigned bytecodeOffset, CodeBlock* codeBlock)
 {
     int startOffset = 0;
     int endOffset = 0;
     int divotPoint = 0;
     int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
-    UString message = "Can't find variable: ";
-    message.append(ident.ustring());
-    JSObject* exception = Error::create(exec, ReferenceError, message, line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL());
+    JSObject* exception = Error::create(exec, ReferenceError, makeString("Can't find variable: ", ident.ustring()), line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL());
     exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
     exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
     exception->putWithAttributes(exec, Identifier(exec, expressionEndOffsetPropertyName), jsNumber(exec, divotPoint + endOffset), ReadOnly | DontDelete);
@@ -83,59 +86,36 @@ JSValue createUndefinedVariableError(ExecState* exec, const Identifier& ident, u
     
 static UString createErrorMessage(ExecState* exec, CodeBlock* codeBlock, int, int expressionStart, int expressionStop, JSValue value, UString error)
 {
-    if (!expressionStop || expressionStart > codeBlock->source()->length()) {
-        UString errorText = value.toString(exec);
-        errorText.append(" is ");
-        errorText.append(error);
-        return errorText;
-    }
+    if (!expressionStop || expressionStart > codeBlock->source()->length())
+        return makeString(value.toString(exec), " is ", error);
+    if (expressionStart < expressionStop)
+        return makeString("Result of expression '", codeBlock->source()->getRange(expressionStart, expressionStop), "' [", value.toString(exec), "] is ", error, ".");
 
-    UString errorText = "Result of expression ";
-    
-    if (expressionStart < expressionStop) {
-        errorText.append('\'');
-        errorText.append(codeBlock->source()->getRange(expressionStart, expressionStop));
-        errorText.append("' [");
-        errorText.append(value.toString(exec));
-        errorText.append("] is ");
-    } else {
-        // No range information, so give a few characters of context
-        const UChar* data = codeBlock->source()->data();
-        int dataLength = codeBlock->source()->length();
-        int start = expressionStart;
-        int stop = expressionStart;
-        // Get up to 20 characters of context to the left and right of the divot, clamping to the line.
-        // then strip whitespace.
-        while (start > 0 && (expressionStart - start < 20) && data[start - 1] != '\n')
-            start--;
-        while (start < (expressionStart - 1) && isStrWhiteSpace(data[start]))
-            start++;
-        while (stop < dataLength && (stop - expressionStart < 20) && data[stop] != '\n')
-            stop++;
-        while (stop > expressionStart && isStrWhiteSpace(data[stop]))
-            stop--;
-        errorText.append("near '...");
-        errorText.append(codeBlock->source()->getRange(start, stop));
-        errorText.append("...' [");
-        errorText.append(value.toString(exec));
-        errorText.append("] is ");
-    }
-    errorText.append(error);
-    errorText.append(".");
-    return errorText;
+    // No range information, so give a few characters of context
+    const UChar* data = codeBlock->source()->data();
+    int dataLength = codeBlock->source()->length();
+    int start = expressionStart;
+    int stop = expressionStart;
+    // Get up to 20 characters of context to the left and right of the divot, clamping to the line.
+    // then strip whitespace.
+    while (start > 0 && (expressionStart - start < 20) && data[start - 1] != '\n')
+        start--;
+    while (start < (expressionStart - 1) && isStrWhiteSpace(data[start]))
+        start++;
+    while (stop < dataLength && (stop - expressionStart < 20) && data[stop] != '\n')
+        stop++;
+    while (stop > expressionStart && isStrWhiteSpace(data[stop]))
+        stop--;
+    return makeString("Result of expression near '...", codeBlock->source()->getRange(start, stop), "...' [", value.toString(exec), "] is ", error, ".");
 }
 
 JSObject* createInvalidParamError(ExecState* exec, const char* op, JSValue value, unsigned bytecodeOffset, CodeBlock* codeBlock)
 {
-    UString message = "not a valid argument for '";
-    message.append(op);
-    message.append("'");
-    
     int startOffset = 0;
     int endOffset = 0;
     int divotPoint = 0;
     int line = codeBlock->expressionRangeForBytecodeOffset(exec, bytecodeOffset, divotPoint, startOffset, endOffset);
-    UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint, divotPoint + endOffset, value, message);
+    UString errorMessage = createErrorMessage(exec, codeBlock, line, divotPoint, divotPoint + endOffset, value, makeString("not a valid argument for '", op, "'"));
     JSObject* exception = Error::create(exec, TypeError, errorMessage, line, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->sourceURL());
     exception->putWithAttributes(exec, Identifier(exec, expressionBeginOffsetPropertyName), jsNumber(exec, divotPoint - startOffset), ReadOnly | DontDelete);
     exception->putWithAttributes(exec, Identifier(exec, expressionCaretOffsetPropertyName), jsNumber(exec, divotPoint), ReadOnly | DontDelete);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.h
index 4c5bec1..e739d09 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ExceptionHelpers.h
@@ -44,6 +44,7 @@ namespace JSC {
     
     JSValue createInterruptedExecutionException(JSGlobalData*);
     JSValue createStackOverflowError(ExecState*);
+    JSValue createTypeError(ExecState*, const char* message);
     JSValue createUndefinedVariableError(ExecState*, const Identifier&, unsigned bytecodeOffset, CodeBlock*);
     JSNotAnObjectErrorStub* createNotAnObjectErrorStub(ExecState*, bool isNull);
     JSObject* createInvalidParamError(ExecState*, const char* op, JSValue, unsigned bytecodeOffset, CodeBlock*);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.cpp
index 7586746..bc18cc9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.cpp
@@ -30,6 +30,7 @@
 #include "CodeBlock.h"
 #include "JIT.h"
 #include "Parser.h"
+#include "StringBuilder.h"
 #include "Vector.h"
 
 namespace JSC {
@@ -265,14 +266,13 @@ PassRefPtr<FunctionExecutable> FunctionExecutable::fromGlobalCode(const Identifi
 UString FunctionExecutable::paramString() const
 {
     FunctionParameters& parameters = *m_parameters;
-    UString s("");
+    StringBuilder builder;
     for (size_t pos = 0; pos < parameters.size(); ++pos) {
-        if (!s.isEmpty())
-            s += ", ";
-        s += parameters[pos].ustring();
+        if (!builder.isEmpty())
+            builder.append(", ");
+        builder.append(parameters[pos].ustring());
     }
-
-    return s;
+    return builder.release();
 }
 
 };
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.h
index 76764f9..d1d38de 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Executable.h
@@ -158,11 +158,6 @@ namespace JSC {
 
     class EvalExecutable : public ScriptExecutable {
     public:
-        EvalExecutable(ExecState* exec, const SourceCode& source)
-            : ScriptExecutable(exec, source)
-            , m_evalCodeBlock(0)
-        {
-        }
 
         ~EvalExecutable();
 
@@ -181,6 +176,11 @@ namespace JSC {
         static PassRefPtr<EvalExecutable> create(ExecState* exec, const SourceCode& source) { return adoptRef(new EvalExecutable(exec, source)); }
 
     private:
+        EvalExecutable(ExecState* exec, const SourceCode& source)
+            : ScriptExecutable(exec, source)
+            , m_evalCodeBlock(0)
+        {
+        }
         EvalCodeBlock* m_evalCodeBlock;
 
 #if ENABLE(JIT)
@@ -199,12 +199,11 @@ namespace JSC {
 
     class ProgramExecutable : public ScriptExecutable {
     public:
-        ProgramExecutable(ExecState* exec, const SourceCode& source)
-            : ScriptExecutable(exec, source)
-            , m_programCodeBlock(0)
+        static PassRefPtr<ProgramExecutable> create(ExecState* exec, const SourceCode& source)
         {
+            return adoptRef(new ProgramExecutable(exec, source));
         }
-        
+
         ~ProgramExecutable();
 
         ProgramCodeBlock& bytecode(ExecState* exec, ScopeChainNode* scopeChainNode)
@@ -223,6 +222,11 @@ namespace JSC {
         ExceptionInfo* reparseExceptionInfo(JSGlobalData*, ScopeChainNode*, CodeBlock*) { ASSERT_NOT_REACHED(); return 0; }
 
     private:
+        ProgramExecutable(ExecState* exec, const SourceCode& source)
+            : ScriptExecutable(exec, source)
+            , m_programCodeBlock(0)
+        {
+        }
         ProgramCodeBlock* m_programCodeBlock;
 
 #if ENABLE(JIT)
@@ -282,7 +286,9 @@ namespace JSC {
         size_t parameterCount() const { return m_parameters->size(); }
         size_t variableCount() const { return m_numVariables; }
         UString paramString() const;
+#ifdef QT_BUILD_SCRIPT_LIB
         UString parameterName(int i) const { return (*m_parameters)[i].ustring(); }
+#endif
 
         void recompile(ExecState*);
         ExceptionInfo* reparseExceptionInfo(JSGlobalData*, ScopeChainNode*, CodeBlock*);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.cpp
index d5eb20f..9d55dd1 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.cpp
@@ -21,20 +21,21 @@
 #include "config.h"
 #include "FunctionConstructor.h"
 
+#include "Debugger.h"
 #include "FunctionPrototype.h"
 #include "JSFunction.h"
 #include "JSGlobalObject.h"
 #include "JSString.h"
-#include "Parser.h"
-#include "Debugger.h"
 #include "Lexer.h"
 #include "Nodes.h"
+#include "Parser.h"
+#include "StringBuilder.h"
 
 namespace JSC {
 
 ASSERT_CLASS_FITS_IN_CELL(FunctionConstructor);
 
-FunctionConstructor::FunctionConstructor(ExecState* exec, PassRefPtr<Structure> structure, FunctionPrototype* functionPrototype)
+FunctionConstructor::FunctionConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, FunctionPrototype* functionPrototype)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, functionPrototype->classInfo()->className))
 {
     putDirectWithoutTransition(exec->propertyNames().prototype, functionPrototype, DontEnum | DontDelete | ReadOnly);
@@ -76,12 +77,19 @@ JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifi
     if (args.isEmpty())
         program = "(function() { \n})";
     else if (args.size() == 1)
-        program = "(function() { " + args.at(0).toString(exec) + "\n})";
+        program = makeString("(function() { ", args.at(0).toString(exec), "\n})");
     else {
-        program = "(function(" + args.at(0).toString(exec);
-        for (size_t i = 1; i < args.size() - 1; i++)
-            program += "," + args.at(i).toString(exec);
-        program += ") { " + args.at(args.size() - 1).toString(exec) + "\n})";
+        StringBuilder builder;
+        builder.append("(function(");
+        builder.append(args.at(0).toString(exec));
+        for (size_t i = 1; i < args.size() - 1; i++) {
+            builder.append(",");
+            builder.append(args.at(i).toString(exec));
+        }
+        builder.append(") { ");
+        builder.append(args.at(args.size() - 1).toString(exec));
+        builder.append("\n})");
+        program = builder.release();
     }
 
     int errLine;
@@ -92,7 +100,7 @@ JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifi
         return throwError(exec, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
 
     JSGlobalObject* globalObject = exec->lexicalGlobalObject();
-    ScopeChain scopeChain(globalObject, globalObject->globalData(), exec->globalThisValue());
+    ScopeChain scopeChain(globalObject, globalObject->globalData(), globalObject, exec->globalThisValue());
     return new (exec) JSFunction(exec, function, scopeChain.node());
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.h
index e8486dc..197f320 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionConstructor.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class FunctionConstructor : public InternalFunction {
     public:
-        FunctionConstructor(ExecState*, PassRefPtr<Structure>, FunctionPrototype*);
+        FunctionConstructor(ExecState*, NonNullPassRefPtr<Structure>, FunctionPrototype*);
 
     private:
         virtual ConstructType getConstructData(ConstructData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.cpp
index 1df998d..00f307e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.cpp
@@ -37,7 +37,7 @@ static JSValue JSC_HOST_CALL functionProtoFuncToString(ExecState*, JSObject*, JS
 static JSValue JSC_HOST_CALL functionProtoFuncApply(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL functionProtoFuncCall(ExecState*, JSObject*, JSValue, const ArgList&);
 
-FunctionPrototype::FunctionPrototype(ExecState* exec, PassRefPtr<Structure> structure)
+FunctionPrototype::FunctionPrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure)
     : InternalFunction(&exec->globalData(), structure, exec->propertyNames().nullIdentifier)
 {
     putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 0), DontDelete | ReadOnly | DontEnum);
@@ -76,7 +76,7 @@ static inline void insertSemicolonIfNeeded(UString& functionBody)
         UChar ch = functionBody[i];
         if (!Lexer::isWhiteSpace(ch) && !Lexer::isLineTerminator(ch)) {
             if (ch != ';' && ch != '}')
-                functionBody = functionBody.substr(0, i + 1) + ";" + functionBody.substr(i + 1, functionBody.size() - (i + 1));
+                functionBody = makeString(functionBody.substr(0, i + 1), ";", functionBody.substr(i + 1, functionBody.size() - (i + 1)));
             return;
         }
     }
@@ -90,13 +90,13 @@ JSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec, JSObject*, JSVa
             FunctionExecutable* executable = function->jsExecutable();
             UString sourceString = executable->source().toString();
             insertSemicolonIfNeeded(sourceString);
-            return jsString(exec, "function " + function->name(&exec->globalData()) + "(" + executable->paramString() + ") " + sourceString);
+            return jsString(exec, makeString("function ", function->name(exec), "(", executable->paramString(), ") ", sourceString));
         }
     }
 
     if (thisValue.inherits(&InternalFunction::info)) {
         InternalFunction* function = asInternalFunction(thisValue);
-        return jsString(exec, "function " + function->name(&exec->globalData()) + "() {\n    [native code]\n}");
+        return jsString(exec, makeString("function ", function->name(exec), "() {\n    [native code]\n}"));
     }
 
 #ifdef QT_BUILD_SCRIPT_LIB  //same error message as in the old engine, and in mozilla
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.h
index 469191e..d1d6a1d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/FunctionPrototype.h
@@ -29,12 +29,12 @@ namespace JSC {
 
     class FunctionPrototype : public InternalFunction {
     public:
-        FunctionPrototype(ExecState*, PassRefPtr<Structure>);
+        FunctionPrototype(ExecState*, NonNullPassRefPtr<Structure>);
         void addFunctionProperties(ExecState*, Structure* prototypeFunctionStructure, NativeFunctionWrapper** callFunction, NativeFunctionWrapper** applyFunction);
 
         static PassRefPtr<Structure> createStructure(JSValue proto)
         {
-            return Structure::create(proto, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultMark | HasDefaultGetPropertyNames));
+            return Structure::create(proto, TypeInfo(ObjectType, StructureFlags));
         }
 
     private:
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GetterSetter.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GetterSetter.h
index 73dd854..68e9ea3 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GetterSetter.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GetterSetter.h
@@ -50,7 +50,7 @@ namespace JSC {
         void setSetter(JSObject* setter) { m_setter = setter; }
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(GetterSetterType));
+            return Structure::create(prototype, TypeInfo(GetterSetterType, OverridesMarkChildren));
         }
     private:
         virtual bool isGetterSetter() const;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.cpp
index 3074f95..c26002b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.cpp
@@ -32,7 +32,7 @@ namespace JSC {
 
 ASSERT_CLASS_FITS_IN_CELL(GlobalEvalFunction);
 
-GlobalEvalFunction::GlobalEvalFunction(ExecState* exec, PassRefPtr<Structure> structure, int len, const Identifier& name, NativeFunction function, JSGlobalObject* cachedGlobalObject)
+GlobalEvalFunction::GlobalEvalFunction(ExecState* exec, NonNullPassRefPtr<Structure> structure, int len, const Identifier& name, NativeFunction function, JSGlobalObject* cachedGlobalObject)
     : PrototypeFunction(exec, structure, len, name, function)
     , m_cachedGlobalObject(cachedGlobalObject)
 {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.h
index c56b0dc..389b1c3 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/GlobalEvalFunction.h
@@ -32,14 +32,17 @@ namespace JSC {
 
     class GlobalEvalFunction : public PrototypeFunction {
     public:
-        GlobalEvalFunction(ExecState*, PassRefPtr<Structure>, int len, const Identifier&, NativeFunction, JSGlobalObject* expectedThisObject);
+        GlobalEvalFunction(ExecState*, NonNullPassRefPtr<Structure>, int len, const Identifier&, NativeFunction, JSGlobalObject* expectedThisObject);
         JSGlobalObject* cachedGlobalObject() const { return m_cachedGlobalObject; }
 
         static PassRefPtr<Structure> createStructure(JSValue prototype) 
         { 
-            return Structure::create(prototype, TypeInfo(ObjectType, ImplementsHasInstance | HasStandardGetOwnPropertySlot));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
+    protected:
+        static const unsigned StructureFlags = ImplementsHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | PrototypeFunction::StructureFlags;
+
     private:
         virtual void markChildren(MarkStack&);
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp
index 7db723b..747c4ac 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp
@@ -28,6 +28,8 @@
 #include <wtf/FastMalloc.h>
 #include <wtf/HashSet.h>
 
+using WTF::ThreadSpecific;
+
 namespace JSC {
 
 typedef HashMap<const char*, RefPtr<UString::Rep>, PtrHash<const char*> > LiteralIdentifierTable;
@@ -38,13 +40,13 @@ public:
     {
         HashSet<UString::Rep*>::iterator end = m_table.end();
         for (HashSet<UString::Rep*>::iterator iter = m_table.begin(); iter != end; ++iter)
-            (*iter)->setIdentifierTable(0);
+            (*iter)->setIsIdentifier(false);
     }
     
     std::pair<HashSet<UString::Rep*>::iterator, bool> add(UString::Rep* value)
     {
         std::pair<HashSet<UString::Rep*>::iterator, bool> result = m_table.add(value);
-        (*result.first)->setIdentifierTable(this);
+        (*result.first)->setIsIdentifier(true);
         return result;
     }
 
@@ -52,7 +54,7 @@ public:
     std::pair<HashSet<UString::Rep*>::iterator, bool> add(U value)
     {
         std::pair<HashSet<UString::Rep*>::iterator, bool> result = m_table.add<U, V>(value);
-        (*result.first)->setIdentifierTable(this);
+        (*result.first)->setIsIdentifier(true);
         return result;
     }
 
@@ -77,7 +79,7 @@ void deleteIdentifierTable(IdentifierTable* table)
 
 bool Identifier::equal(const UString::Rep* r, const char* s)
 {
-    int length = r->len;
+    int length = r->size();
     const UChar* d = r->data();
     for (int i = 0; i != length; ++i)
         if (d[i] != (unsigned char)s[i])
@@ -87,7 +89,7 @@ bool Identifier::equal(const UString::Rep* r, const char* s)
 
 bool Identifier::equal(const UString::Rep* r, const UChar* s, int length)
 {
-    if (r->len != length)
+    if (r->size() != length)
         return false;
     const UChar* d = r->data();
     for (int i = 0; i != length; ++i)
@@ -110,13 +112,11 @@ struct CStringTranslator {
     static void translate(UString::Rep*& location, const char* c, unsigned hash)
     {
         size_t length = strlen(c);
-        UChar* d = static_cast<UChar*>(fastMalloc(sizeof(UChar) * length));
+        UChar* d;
+        UString::Rep* r = UString::Rep::createUninitialized(length, d).releaseRef();
         for (size_t i = 0; i != length; i++)
             d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
-        
-        UString::Rep* r = UString::Rep::create(d, static_cast<int>(length)).releaseRef();
-        r->_hash = hash;
-
+        r->setHash(hash);
         location = r;
     }
 };
@@ -175,13 +175,11 @@ struct UCharBufferTranslator {
 
     static void translate(UString::Rep*& location, const UCharBuffer& buf, unsigned hash)
     {
-        UChar* d = static_cast<UChar*>(fastMalloc(sizeof(UChar) * buf.length));
+        UChar* d;
+        UString::Rep* r = UString::Rep::createUninitialized(buf.length, d).releaseRef();
         for (unsigned i = 0; i != buf.length; i++)
             d[i] = buf.s[i];
-        
-        UString::Rep* r = UString::Rep::create(d, buf.length).releaseRef();
-        r->_hash = hash;
-        
+        r->setHash(hash);
         location = r; 
     }
 };
@@ -212,19 +210,19 @@ PassRefPtr<UString::Rep> Identifier::add(ExecState* exec, const UChar* s, int le
 
 PassRefPtr<UString::Rep> Identifier::addSlowCase(JSGlobalData* globalData, UString::Rep* r)
 {
-    ASSERT(!r->identifierTable());
-    if (r->len == 1) {
+    ASSERT(!r->isIdentifier());
+    if (r->size() == 1) {
         UChar c = r->data()[0];
         if (c <= 0xFF)
             r = globalData->smallStrings.singleCharacterStringRep(c);
-            if (r->identifierTable()) {
+            if (r->isIdentifier()) {
 #ifndef NDEBUG
                 checkSameIdentifierTable(globalData, r);
 #endif
                 return r;
             }
     }
-    if (!r->len) {
+    if (!r->size()) {
         UString::Rep::empty().hash();
         return &UString::Rep::empty();
     }
@@ -238,19 +236,19 @@ PassRefPtr<UString::Rep> Identifier::addSlowCase(ExecState* exec, UString::Rep*
 
 void Identifier::remove(UString::Rep* r)
 {
-    r->identifierTable()->remove(r);
+    currentIdentifierTable()->remove(r);
 }
 
 #ifndef NDEBUG
 
-void Identifier::checkSameIdentifierTable(ExecState* exec, UString::Rep* rep)
+void Identifier::checkSameIdentifierTable(ExecState* exec, UString::Rep*)
 {
-    ASSERT(rep->identifierTable() == exec->globalData().identifierTable);
+    ASSERT_UNUSED(exec, exec->globalData().identifierTable == currentIdentifierTable());
 }
 
-void Identifier::checkSameIdentifierTable(JSGlobalData* globalData, UString::Rep* rep)
+void Identifier::checkSameIdentifierTable(JSGlobalData* globalData, UString::Rep*)
 {
-    ASSERT(rep->identifierTable() == globalData->identifierTable);
+    ASSERT_UNUSED(globalData, globalData->identifierTable == currentIdentifierTable());
 }
 
 #else
@@ -265,4 +263,30 @@ void Identifier::checkSameIdentifierTable(JSGlobalData*, UString::Rep*)
 
 #endif
 
+ThreadSpecific<ThreadIdentifierTableData>* g_identifierTableSpecific = 0;
+
+#if ENABLE(JSC_MULTIPLE_THREADS)
+
+pthread_once_t createIdentifierTableSpecificOnce = PTHREAD_ONCE_INIT;
+static void createIdentifierTableSpecificCallback()
+{
+    ASSERT(!g_identifierTableSpecific);
+    g_identifierTableSpecific = new ThreadSpecific<ThreadIdentifierTableData>();
+}
+void createIdentifierTableSpecific()
+{
+    pthread_once(&createIdentifierTableSpecificOnce, createIdentifierTableSpecificCallback);
+    ASSERT(g_identifierTableSpecific);
+}
+
+#else 
+
+void createIdentifierTableSpecific()
+{
+    ASSERT(!g_identifierTableSpecific);
+    g_identifierTableSpecific = new ThreadSpecific<ThreadIdentifierTableData>();
+}
+
+#endif
+
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.h
index 2249179..1d1bd18 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.h
@@ -22,6 +22,7 @@
 #define Identifier_h
 
 #include "JSGlobalData.h"
+#include "ThreadSpecific.h"
 #include "UString.h"
 
 namespace JSC {
@@ -92,7 +93,7 @@ namespace JSC {
 
         static PassRefPtr<UString::Rep> add(ExecState* exec, UString::Rep* r)
         {
-            if (r->identifierTable()) {
+            if (r->isIdentifier()) {
 #ifndef NDEBUG
                 checkSameIdentifierTable(exec, r);
 #endif
@@ -102,7 +103,7 @@ namespace JSC {
         }
         static PassRefPtr<UString::Rep> add(JSGlobalData* globalData, UString::Rep* r)
         {
-            if (r->identifierTable()) {
+            if (r->isIdentifier()) {
 #ifndef NDEBUG
                 checkSameIdentifierTable(globalData, r);
 #endif
@@ -141,6 +142,67 @@ namespace JSC {
     IdentifierTable* createIdentifierTable();
     void deleteIdentifierTable(IdentifierTable*);
 
+    struct ThreadIdentifierTableData {
+        ThreadIdentifierTableData()
+            : defaultIdentifierTable(0)
+            , currentIdentifierTable(0)
+        {
+        }
+
+        IdentifierTable* defaultIdentifierTable;
+        IdentifierTable* currentIdentifierTable;
+    };
+
+    extern WTF::ThreadSpecific<ThreadIdentifierTableData>* g_identifierTableSpecific;
+    void createIdentifierTableSpecific();
+
+    inline IdentifierTable* defaultIdentifierTable()
+    {
+        if (!g_identifierTableSpecific)
+            createIdentifierTableSpecific();
+        ThreadIdentifierTableData& data = **g_identifierTableSpecific;
+
+        return data.defaultIdentifierTable;
+    }
+
+    inline void setDefaultIdentifierTable(IdentifierTable* identifierTable)
+    {
+        if (!g_identifierTableSpecific)
+            createIdentifierTableSpecific();
+        ThreadIdentifierTableData& data = **g_identifierTableSpecific;
+
+        data.defaultIdentifierTable = identifierTable;
+    }
+
+    inline IdentifierTable* currentIdentifierTable()
+    {
+        if (!g_identifierTableSpecific)
+            createIdentifierTableSpecific();
+        ThreadIdentifierTableData& data = **g_identifierTableSpecific;
+
+        return data.currentIdentifierTable;
+    }
+
+    inline IdentifierTable* setCurrentIdentifierTable(IdentifierTable* identifierTable)
+    {
+        if (!g_identifierTableSpecific)
+            createIdentifierTableSpecific();
+        ThreadIdentifierTableData& data = **g_identifierTableSpecific;
+
+        IdentifierTable* oldIdentifierTable = data.currentIdentifierTable;
+        data.currentIdentifierTable = identifierTable;
+        return oldIdentifierTable;
+    }
+
+    inline void resetCurrentIdentifierTable()
+    {
+        if (!g_identifierTableSpecific)
+            createIdentifierTableSpecific();
+        ThreadIdentifierTableData& data = **g_identifierTableSpecific;
+
+        data.currentIdentifierTable = data.defaultIdentifierTable;
+    }
+
 } // namespace JSC
 
 #endif // Identifier_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InitializeThreading.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InitializeThreading.cpp
index fea89f8..2605a9a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InitializeThreading.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InitializeThreading.cpp
@@ -41,7 +41,7 @@ using namespace WTF;
 
 namespace JSC {
 
-#if PLATFORM(DARWIN) && ENABLE(JSC_MULTIPLE_THREADS)
+#if OS(DARWIN) && ENABLE(JSC_MULTIPLE_THREADS)
 static pthread_once_t initializeThreadingKeyOnce = PTHREAD_ONCE_INIT;
 #endif
 
@@ -49,15 +49,16 @@ static void initializeThreadingOnce()
 {
     WTF::initializeThreading();
     initializeUString();
+    JSGlobalData::storeVPtrs();
 #if ENABLE(JSC_MULTIPLE_THREADS)
     s_dtoaP5Mutex = new Mutex;
-    WTF::initializeDates();
+    initializeDates();
 #endif
 }
 
 void initializeThreading()
 {
-#if PLATFORM(DARWIN) && ENABLE(JSC_MULTIPLE_THREADS)
+#if OS(DARWIN) && ENABLE(JSC_MULTIPLE_THREADS)
     pthread_once(&initializeThreadingKeyOnce, initializeThreadingOnce);
 #else
     static bool initializedThreading = false;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.cpp
index b5c9571..c48d628 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.cpp
@@ -37,35 +37,35 @@ const ClassInfo* InternalFunction::classInfo() const
     return &info;
 }
 
-InternalFunction::InternalFunction(JSGlobalData* globalData, PassRefPtr<Structure> structure, const Identifier& name)
+InternalFunction::InternalFunction(JSGlobalData* globalData, NonNullPassRefPtr<Structure> structure, const Identifier& name)
     : JSObject(structure)
 {
     putDirect(globalData->propertyNames->name, jsString(globalData, name.ustring()), DontDelete | ReadOnly | DontEnum);
 }
 
-const UString& InternalFunction::name(JSGlobalData* globalData)
+const UString& InternalFunction::name(ExecState* exec)
 {
-    return asString(getDirect(globalData->propertyNames->name))->value();
+    return asString(getDirect(exec->globalData().propertyNames->name))->value(exec);
 }
 
-const UString InternalFunction::displayName(JSGlobalData* globalData)
+const UString InternalFunction::displayName(ExecState* exec)
 {
-    JSValue displayName = getDirect(globalData->propertyNames->displayName);
+    JSValue displayName = getDirect(exec->globalData().propertyNames->displayName);
     
-    if (displayName && isJSString(globalData, displayName))
-        return asString(displayName)->value();
+    if (displayName && isJSString(&exec->globalData(), displayName))
+        return asString(displayName)->value(exec);
     
     return UString::null();
 }
 
-const UString InternalFunction::calculatedDisplayName(JSGlobalData* globalData)
+const UString InternalFunction::calculatedDisplayName(ExecState* exec)
 {
-    const UString explicitName = displayName(globalData);
+    const UString explicitName = displayName(exec);
     
     if (!explicitName.isEmpty())
         return explicitName;
     
-    return name(globalData);
+    return name(exec);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.h
index 37077f6..fa1e5aa 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/InternalFunction.h
@@ -36,18 +36,20 @@ namespace JSC {
         virtual const ClassInfo* classInfo() const; 
         static JS_EXPORTDATA const ClassInfo info;
 
-        const UString& name(JSGlobalData*);
-        const UString displayName(JSGlobalData*);
-        const UString calculatedDisplayName(JSGlobalData*);
+        const UString& name(ExecState*);
+        const UString displayName(ExecState*);
+        const UString calculatedDisplayName(ExecState*);
 
         static PassRefPtr<Structure> createStructure(JSValue proto) 
         { 
-            return Structure::create(proto, TypeInfo(ObjectType, ImplementsHasInstance | HasStandardGetOwnPropertySlot | HasDefaultMark)); 
+            return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); 
         }
 
     protected:
-        InternalFunction(PassRefPtr<Structure> structure) : JSObject(structure) { }
-        InternalFunction(JSGlobalData*, PassRefPtr<Structure>, const Identifier&);
+        static const unsigned StructureFlags = ImplementsHasInstance | JSObject::StructureFlags;
+
+        InternalFunction(NonNullPassRefPtr<Structure> structure) : JSObject(structure) { }
+        InternalFunction(JSGlobalData*, NonNullPassRefPtr<Structure>, const Identifier&);
 
     private:
         virtual CallType getCallData(CallData&) = 0;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSAPIValueWrapper.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSAPIValueWrapper.h
index 88a8493..aca550e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSAPIValueWrapper.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSAPIValueWrapper.h
@@ -39,7 +39,7 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(CompoundType));
+            return Structure::create(prototype, TypeInfo(CompoundType, OverridesMarkChildren | OverridesGetPropertyNames));
         }
 
         
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.cpp
index d989a89..22fdaaf 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.cpp
@@ -39,7 +39,7 @@ ASSERT_CLASS_FITS_IN_CELL(JSActivation);
 
 const ClassInfo JSActivation::info = { "JSActivation", 0, 0, 0 };
 
-JSActivation::JSActivation(CallFrame* callFrame, PassRefPtr<FunctionExecutable> functionExecutable)
+JSActivation::JSActivation(CallFrame* callFrame, NonNullPassRefPtr<FunctionExecutable> functionExecutable)
     : Base(callFrame->globalData().activationStructure, new JSActivationData(functionExecutable, callFrame->registers()))
 {
 }
@@ -121,12 +121,12 @@ void JSActivation::putWithAttributes(ExecState* exec, const Identifier& property
     JSObject::putWithAttributes(exec, propertyName, value, attributes, true, slot);
 }
 
-bool JSActivation::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool JSActivation::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
     if (propertyName == exec->propertyNames().arguments)
         return false;
 
-    return Base::deleteProperty(exec, propertyName, checkDontDelete);
+    return Base::deleteProperty(exec, propertyName);
 }
 
 JSObject* JSActivation::toThisObject(ExecState* exec) const
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.h
index 90815a1..ee98191 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.h
@@ -43,7 +43,7 @@ namespace JSC {
     class JSActivation : public JSVariableObject {
         typedef JSVariableObject Base;
     public:
-        JSActivation(CallFrame*, PassRefPtr<FunctionExecutable>);
+        JSActivation(CallFrame*, NonNullPassRefPtr<FunctionExecutable>);
         virtual ~JSActivation();
 
         virtual void markChildren(MarkStack&);
@@ -57,7 +57,7 @@ namespace JSC {
         virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
 
         virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
 
         virtual JSObject* toThisObject(ExecState*) const;
 
@@ -66,11 +66,14 @@ namespace JSC {
         virtual const ClassInfo* classInfo() const { return &info; }
         static const ClassInfo info;
 
-        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, NeedsThisConversion)); }
+        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); }
+
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
 
     private:
         struct JSActivationData : public JSVariableObjectData {
-            JSActivationData(PassRefPtr<FunctionExecutable> _functionExecutable, Register* registers)
+            JSActivationData(NonNullPassRefPtr<FunctionExecutable> _functionExecutable, Register* registers)
                 : JSVariableObjectData(_functionExecutable->generatedBytecode().symbolTable(), registers)
                 , functionExecutable(_functionExecutable)
             {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.cpp
index 9e0ab59..2be7371 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.cpp
@@ -130,7 +130,7 @@ inline void JSArray::checkConsistency(ConsistencyCheckType)
 
 #endif
 
-JSArray::JSArray(PassRefPtr<Structure> structure)
+JSArray::JSArray(NonNullPassRefPtr<Structure> structure)
     : JSObject(structure)
 {
     unsigned initialCapacity = 0;
@@ -141,7 +141,7 @@ JSArray::JSArray(PassRefPtr<Structure> structure)
     checkConsistency();
 }
 
-JSArray::JSArray(PassRefPtr<Structure> structure, unsigned initialLength)
+JSArray::JSArray(NonNullPassRefPtr<Structure> structure, unsigned initialLength)
     : JSObject(structure)
 {
     unsigned initialCapacity = min(initialLength, MIN_SPARSE_ARRAY_INDEX);
@@ -152,6 +152,7 @@ JSArray::JSArray(PassRefPtr<Structure> structure, unsigned initialLength)
     m_storage->m_numValuesInVector = 0;
     m_storage->m_sparseValueMap = 0;
     m_storage->lazyCreationData = 0;
+    m_storage->reportedMapCapacity = 0;
 
     JSValue* vector = m_storage->m_vector;
     for (size_t i = 0; i < initialCapacity; ++i)
@@ -162,7 +163,7 @@ JSArray::JSArray(PassRefPtr<Structure> structure, unsigned initialLength)
     Heap::heap(this)->reportExtraMemoryCost(initialCapacity * sizeof(JSValue));
 }
 
-JSArray::JSArray(PassRefPtr<Structure> structure, const ArgList& list)
+JSArray::JSArray(NonNullPassRefPtr<Structure> structure, const ArgList& list)
     : JSObject(structure)
 {
     unsigned initialCapacity = list.size();
@@ -172,6 +173,8 @@ JSArray::JSArray(PassRefPtr<Structure> structure, const ArgList& list)
     m_vectorLength = initialCapacity;
     m_storage->m_numValuesInVector = initialCapacity;
     m_storage->m_sparseValueMap = 0;
+    m_storage->lazyCreationData = 0;
+    m_storage->reportedMapCapacity = 0;
 
     size_t i = 0;
     ArgList::const_iterator end = list.end();
@@ -185,6 +188,7 @@ JSArray::JSArray(PassRefPtr<Structure> structure, const ArgList& list)
 
 JSArray::~JSArray()
 {
+    ASSERT(vptr() == JSGlobalData::jsArrayVPtr);
     checkConsistency(DestructorConsistencyCheck);
 
     delete m_storage->m_sparseValueMap;
@@ -328,13 +332,24 @@ NEVER_INLINE void JSArray::putSlowCase(ExecState* exec, unsigned i, JSValue valu
         }
 
         // We miss some cases where we could compact the storage, such as a large array that is being filled from the end
-        // (which will only be compacted as we reach indices that are less than cutoff) - but this makes the check much faster.
+        // (which will only be compacted as we reach indices that are less than MIN_SPARSE_ARRAY_INDEX) - but this makes the check much faster.
         if ((i > MAX_STORAGE_VECTOR_INDEX) || !isDenseEnoughForVector(i + 1, storage->m_numValuesInVector + 1)) {
             if (!map) {
                 map = new SparseArrayValueMap;
                 storage->m_sparseValueMap = map;
             }
-            map->set(i, value);
+
+            pair<SparseArrayValueMap::iterator, bool> result = map->add(i, value);
+            if (!result.second) { // pre-existing entry
+                result.first->second = value;
+                return;
+            }
+
+            size_t capacity = map->capacity();
+            if (capacity != storage->reportedMapCapacity) {
+                Heap::heap(this)->reportExtraMemoryCost((capacity - storage->reportedMapCapacity) * (sizeof(unsigned) + sizeof(JSValue)));
+                storage->reportedMapCapacity = capacity;
+            }
             return;
         }
     }
@@ -380,8 +395,6 @@ NEVER_INLINE void JSArray::putSlowCase(ExecState* exec, unsigned i, JSValue valu
 
     unsigned vectorLength = m_vectorLength;
 
-    Heap::heap(this)->reportExtraMemoryCost(storageSize(newVectorLength) - storageSize(vectorLength));
-
     if (newNumValuesInVector == storage->m_numValuesInVector + 1) {
         for (unsigned j = vectorLength; j < newVectorLength; ++j)
             storage->m_vector[j] = JSValue();
@@ -402,22 +415,24 @@ NEVER_INLINE void JSArray::putSlowCase(ExecState* exec, unsigned i, JSValue valu
     m_storage = storage;
 
     checkConsistency();
+
+    Heap::heap(this)->reportExtraMemoryCost(storageSize(newVectorLength) - storageSize(vectorLength));
 }
 
-bool JSArray::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool JSArray::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
     bool isArrayIndex;
     unsigned i = propertyName.toArrayIndex(&isArrayIndex);
     if (isArrayIndex)
-        return deleteProperty(exec, i, checkDontDelete);
+        return deleteProperty(exec, i);
 
     if (propertyName == exec->propertyNames().length)
         return false;
 
-    return JSObject::deleteProperty(exec, propertyName, checkDontDelete);
+    return JSObject::deleteProperty(exec, propertyName);
 }
 
-bool JSArray::deleteProperty(ExecState* exec, unsigned i, bool checkDontDelete)
+bool JSArray::deleteProperty(ExecState* exec, unsigned i)
 {
     checkConsistency();
 
@@ -449,12 +464,12 @@ bool JSArray::deleteProperty(ExecState* exec, unsigned i, bool checkDontDelete)
     checkConsistency();
 
     if (i > MAX_ARRAY_INDEX)
-        return deleteProperty(exec, Identifier::from(exec, i), checkDontDelete);
+        return deleteProperty(exec, Identifier::from(exec, i));
 
     return false;
 }
 
-void JSArray::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void JSArray::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
     // FIXME: Filling PropertyNameArray with an identifier for every integer
     // is incredibly inefficient for large arrays. We need a different approach,
@@ -474,7 +489,10 @@ void JSArray::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNa
             propertyNames.add(Identifier::from(exec, it->first));
     }
 
-    JSObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+    if (mode == IncludeDontEnumProperties)
+        propertyNames.add(exec->propertyNames().length);
+
+    JSObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 bool JSArray::increaseVectorLength(unsigned newLength)
@@ -492,13 +510,15 @@ bool JSArray::increaseVectorLength(unsigned newLength)
     if (!tryFastRealloc(storage, storageSize(newVectorLength)).getValue(storage))
         return false;
 
-    Heap::heap(this)->reportExtraMemoryCost(storageSize(newVectorLength) - storageSize(vectorLength));
     m_vectorLength = newVectorLength;
 
     for (unsigned i = vectorLength; i < newVectorLength; ++i)
         storage->m_vector[i] = JSValue();
 
     m_storage = storage;
+
+    Heap::heap(this)->reportExtraMemoryCost(storageSize(newVectorLength) - storageSize(vectorLength));
+
     return true;
 }
 
@@ -785,7 +805,7 @@ struct AVLTreeAbstractorForArrayCompare {
             m_cachedCall->setThis(m_globalThisValue);
             m_cachedCall->setArgument(0, va);
             m_cachedCall->setArgument(1, vb);
-            compareResult = m_cachedCall->call().toNumber(m_cachedCall->newCallFrame());
+            compareResult = m_cachedCall->call().toNumber(m_cachedCall->newCallFrame(m_exec));
         } else {
             MarkedArgumentBuffer arguments;
             arguments.append(va);
@@ -1051,26 +1071,4 @@ void JSArray::checkConsistency(ConsistencyCheckType type)
 
 #endif
 
-JSArray* constructEmptyArray(ExecState* exec)
-{
-    return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure());
-}
-
-JSArray* constructEmptyArray(ExecState* exec, unsigned initialLength)
-{
-    return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), initialLength);
-}
-
-JSArray* constructArray(ExecState* exec, JSValue singleItemValue)
-{
-    MarkedArgumentBuffer values;
-    values.append(singleItemValue);
-    return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), values);
-}
-
-JSArray* constructArray(ExecState* exec, const ArgList& values)
-{
-    return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), values);
-}
-
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.h
index 2613991..64b2ff1 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSArray.h
@@ -32,6 +32,7 @@ namespace JSC {
         unsigned m_numValuesInVector;
         SparseArrayValueMap* m_sparseValueMap;
         void* lazyCreationData; // A JSArray subclass can use this to fill the vector lazily.
+        size_t reportedMapCapacity;
         JSValue m_vector[1];
     };
 
@@ -40,9 +41,9 @@ namespace JSC {
         friend class Walker;
 
     public:
-        explicit JSArray(PassRefPtr<Structure>);
-        JSArray(PassRefPtr<Structure>, unsigned initialLength);
-        JSArray(PassRefPtr<Structure>, const ArgList& initialValues);
+        explicit JSArray(NonNullPassRefPtr<Structure>);
+        JSArray(NonNullPassRefPtr<Structure>, unsigned initialLength);
+        JSArray(NonNullPassRefPtr<Structure>, const ArgList& initialValues);
         virtual ~JSArray();
 
         virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
@@ -87,16 +88,17 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
         
         inline void markChildrenDirect(MarkStack& markStack);
 
     protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags;
         virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
-        virtual bool deleteProperty(ExecState*, unsigned propertyName, bool checkDontDelete = true);
-        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, bool includeNonEnumerable = false);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+        virtual bool deleteProperty(ExecState*, unsigned propertyName);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
         virtual void markChildren(MarkStack&);
 
         void* lazyCreationData();
@@ -121,11 +123,6 @@ namespace JSC {
 
     JSArray* asArray(JSValue);
 
-    JSArray* constructEmptyArray(ExecState*);
-    JSArray* constructEmptyArray(ExecState*, unsigned initialLength);
-    JSArray* constructArray(ExecState*, JSValue singleItemValue);
-    JSArray* constructArray(ExecState*, const ArgList& values);
-
     inline JSArray* asArray(JSCell* cell)
     {
         ASSERT(cell->inherits(&JSArray::info));
@@ -162,7 +159,7 @@ namespace JSC {
     inline void MarkStack::markChildren(JSCell* cell)
     {
         ASSERT(Heap::isCellMarked(cell));
-        if (cell->structure()->typeInfo().hasDefaultMark()) {
+        if (!cell->structure()->typeInfo().overridesMarkChildren()) {
 #ifdef NDEBUG
             asObject(cell)->markChildrenDirect(*this);
 #else
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.cpp
index 0907099..f8ab1e8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.cpp
@@ -35,17 +35,25 @@ namespace JSC {
 
 const ClassInfo JSByteArray::s_defaultInfo = { "ByteArray", 0, 0, 0 };
 
-JSByteArray::JSByteArray(ExecState* exec, PassRefPtr<Structure> structure, ByteArray* storage, const JSC::ClassInfo* classInfo)
+JSByteArray::JSByteArray(ExecState* exec, NonNullPassRefPtr<Structure> structure, ByteArray* storage, const JSC::ClassInfo* classInfo)
     : JSObject(structure)
     , m_storage(storage)
     , m_classInfo(classInfo)
 {
     putDirect(exec->globalData().propertyNames->length, jsNumber(exec, m_storage->length()), ReadOnly | DontDelete);
 }
-    
+
+#if !ASSERT_DISABLED
+JSByteArray::~JSByteArray()
+{
+    ASSERT(vptr() == JSGlobalData::jsByteArrayVPtr);
+}
+#endif
+
+
 PassRefPtr<Structure> JSByteArray::createStructure(JSValue prototype)
 {
-    PassRefPtr<Structure> result = Structure::create(prototype, TypeInfo(ObjectType, HasDefaultMark));
+    PassRefPtr<Structure> result = Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
     return result;
 }
 
@@ -96,12 +104,12 @@ void JSByteArray::put(ExecState* exec, unsigned propertyName, JSValue value)
     setIndex(exec, propertyName, value);
 }
 
-void JSByteArray::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void JSByteArray::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
     unsigned length = m_storage->length();
     for (unsigned i = 0; i < length; ++i)
         propertyNames.add(Identifier::from(exec, i));
-    JSObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+    JSObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.h
index 5ea0505..5b7adcf 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSByteArray.h
@@ -33,7 +33,7 @@
 namespace JSC {
 
     class JSByteArray : public JSObject {
-        friend struct VPtrSet;
+        friend class JSGlobalData;
     public:
         bool canAccessIndex(unsigned i) { return i < m_storage->length(); }
         JSValue getIndex(ExecState* exec, unsigned i)
@@ -73,7 +73,7 @@ namespace JSC {
                 setIndex(i, byteValue);
         }
 
-        JSByteArray(ExecState* exec, PassRefPtr<Structure>, WTF::ByteArray* storage, const JSC::ClassInfo* = &s_defaultInfo);
+        JSByteArray(ExecState* exec, NonNullPassRefPtr<Structure>, WTF::ByteArray* storage, const JSC::ClassInfo* = &s_defaultInfo);
         static PassRefPtr<Structure> createStructure(JSValue prototype);
         
         virtual bool getOwnPropertySlot(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertySlot&);
@@ -82,7 +82,7 @@ namespace JSC {
         virtual void put(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSValue, JSC::PutPropertySlot&);
         virtual void put(JSC::ExecState*, unsigned propertyName, JSC::JSValue);
 
-        virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&, bool includeNonEnumerable = false);
+        virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
 
         virtual const ClassInfo* classInfo() const { return m_classInfo; }
         static const ClassInfo s_defaultInfo;
@@ -91,6 +91,13 @@ namespace JSC {
 
         WTF::ByteArray* storage() const { return m_storage.get(); }
 
+#if !ASSERT_DISABLED
+        virtual ~JSByteArray();
+#endif
+
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesGetPropertyNames | JSObject::StructureFlags;
+
     private:
         enum VPtrStealingHackType { VPtrStealingHack };
         JSByteArray(VPtrStealingHackType) 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.cpp
index 1cfe72d..869fbfc 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.cpp
@@ -59,10 +59,10 @@ static const union {
     } doubles;
     
 } NaNInf = { {
-#if PLATFORM(BIG_ENDIAN)
+#if CPU(BIG_ENDIAN)
     { 0x7f, 0xf8, 0, 0, 0, 0, 0, 0 },
     { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 }
-#elif PLATFORM(MIDDLE_ENDIAN)
+#elif CPU(MIDDLE_ENDIAN)
     { 0, 0, 0xf8, 0x7f, 0, 0, 0, 0 },
     { 0, 0, 0xf0, 0x7f, 0, 0, 0, 0 }
 #else
@@ -76,31 +76,22 @@ extern const double Inf = NaNInf.doubles.Inf_Double;
  
 #endif // !(defined NAN && defined INFINITY)
 
-void* JSCell::operator new(size_t size, ExecState* exec)
-{
-#ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
-    return exec->heap()->inlineAllocate(size);
-#else
-    return exec->heap()->allocate(size);
-#endif
-}
-
 bool JSCell::getUInt32(uint32_t&) const
 {
     return false;
 }
 
-bool JSCell::getString(UString&stringValue) const
+bool JSCell::getString(ExecState* exec, UString&stringValue) const
 {
     if (!isString())
         return false;
-    stringValue = static_cast<const JSString*>(this)->value();
+    stringValue = static_cast<const JSString*>(this)->value(exec);
     return true;
 }
 
-UString JSCell::getString() const
+UString JSCell::getString(ExecState* exec) const
 {
-    return isString() ? static_cast<const JSString*>(this)->value() : UString();
+    return isString() ? static_cast<const JSString*>(this)->value(exec) : UString();
 }
 
 JSObject* JSCell::getObject()
@@ -157,14 +148,14 @@ void JSCell::put(ExecState* exec, unsigned identifier, JSValue value)
     toObject(exec)->put(exec, identifier, value);
 }
 
-bool JSCell::deleteProperty(ExecState* exec, const Identifier& identifier, bool checkDontDelete)
+bool JSCell::deleteProperty(ExecState* exec, const Identifier& identifier)
 {
-    return toObject(exec)->deleteProperty(exec, identifier, checkDontDelete);
+    return toObject(exec)->deleteProperty(exec, identifier);
 }
 
-bool JSCell::deleteProperty(ExecState* exec, unsigned identifier, bool checkDontDelete)
+bool JSCell::deleteProperty(ExecState* exec, unsigned identifier)
 {
-    return toObject(exec)->deleteProperty(exec, identifier, checkDontDelete);
+    return toObject(exec)->deleteProperty(exec, identifier);
 }
 
 JSObject* JSCell::toThisObject(ExecState* exec) const
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.h
index d015b9c..36bfd66 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSCell.h
@@ -42,14 +42,19 @@ namespace JSC {
         friend class JSString;
         friend class JSValue;
         friend class JSAPIValueWrapper;
-        friend struct VPtrSet;
+        friend class JSZombie;
+        friend class JSGlobalData;
 
     private:
         explicit JSCell(Structure*);
-        JSCell(); // Only used for initializing Collector blocks.
         virtual ~JSCell();
 
     public:
+        static PassRefPtr<Structure> createDummyStructure()
+        {
+            return Structure::create(jsNull(), TypeInfo(UnspecifiedType));
+        }
+
         // Querying the type.
 #if USE(JSVALUE32)
         bool isNumber() const;
@@ -59,12 +64,13 @@ namespace JSC {
         virtual bool isGetterSetter() const;
         bool inherits(const ClassInfo*) const;
         virtual bool isAPIValueWrapper() const { return false; }
+        virtual bool isPropertyNameIterator() const { return false; }
 
         Structure* structure() const;
 
         // Extracting the value.
-        bool getString(UString&) const;
-        UString getString() const; // null string if not a string
+        bool getString(ExecState* exec, UString&) const;
+        UString getString(ExecState* exec) const; // null string if not a string
         JSObject* getObject(); // NULL if not an object
         const JSObject* getObject() const; // NULL if not an object
         
@@ -89,19 +95,23 @@ namespace JSC {
         void* operator new(size_t, void* placementNewDestination) { return placementNewDestination; }
 
         virtual void markChildren(MarkStack&);
+#if ENABLE(JSC_ZOMBIES)
+        virtual bool isZombie() const { return false; }
+#endif
 
         // Object operations, with the toObject operation included.
         virtual const ClassInfo* classInfo() const;
         virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
         virtual void put(ExecState*, unsigned propertyName, JSValue);
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
-        virtual bool deleteProperty(ExecState*, unsigned propertyName, bool checkDontDelete = true);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+        virtual bool deleteProperty(ExecState*, unsigned propertyName);
 
         virtual JSObject* toThisObject(ExecState*) const;
         virtual UString toThisString(ExecState*) const;
         virtual JSString* toThisJSString(ExecState*);
         virtual JSValue getJSNumber();
         void* vptr() { return *reinterpret_cast<void**>(this); }
+        void setVPtr(void* vptr) { *reinterpret_cast<void**>(this) = vptr; }
 
     private:
         // Base implementation; for non-object classes implements getPropertySlot.
@@ -112,24 +122,11 @@ namespace JSC {
         Structure* m_structure;
     };
 
-    // FIXME: We should deprecate this and just use JSValue::asCell() instead.
-    JSCell* asCell(JSValue);
-
-    inline JSCell* asCell(JSValue value)
-    {
-        return value.asCell();
-    }
-
     inline JSCell::JSCell(Structure* structure)
         : m_structure(structure)
     {
     }
 
-    // Only used for initializing Collector blocks.
-    inline JSCell::JSCell()
-    {
-    }
-
     inline JSCell::~JSCell()
     {
     }
@@ -137,7 +134,7 @@ namespace JSC {
 #if USE(JSVALUE32)
     inline bool JSCell::isNumber() const
     {
-        return Heap::isNumber(const_cast<JSCell*>(this));
+        return m_structure->typeInfo().type() == NumberType;
     }
 #endif
 
@@ -162,11 +159,12 @@ namespace JSC {
 
     inline void* JSCell::operator new(size_t size, JSGlobalData* globalData)
     {
-#ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
-        return globalData->heap.inlineAllocate(size);
-#else
         return globalData->heap.allocate(size);
-#endif
+    }
+
+    inline void* JSCell::operator new(size_t size, ExecState* exec)
+    {
+        return exec->heap()->allocate(size);
     }
 
     // --- JSValue inlines ----------------------------
@@ -186,14 +184,14 @@ namespace JSC {
         return isCell() && asCell()->isObject();
     }
 
-    inline bool JSValue::getString(UString& s) const
+    inline bool JSValue::getString(ExecState* exec, UString& s) const
     {
-        return isCell() && asCell()->getString(s);
+        return isCell() && asCell()->getString(exec, s);
     }
 
-    inline UString JSValue::getString() const
+    inline UString JSValue::getString(ExecState* exec) const
     {
-        return isCell() ? asCell()->getString() : UString();
+        return isCell() ? asCell()->getString(exec) : UString();
     }
 
     inline JSObject* JSValue::getObject() const
@@ -342,11 +340,6 @@ namespace JSC {
             append(value.asCell());
     }
 
-    inline void Structure::markAggregate(MarkStack& markStack)
-    {
-        markStack.append(m_prototype);
-    }
-
     inline Heap* Heap::heap(JSValue v)
     {
         if (!v.isCell())
@@ -358,7 +351,13 @@ namespace JSC {
     {
         return cellBlock(c)->heap;
     }
-
+    
+#if ENABLE(JSC_ZOMBIES)
+    inline bool JSValue::isZombie() const
+    {
+        return isCell() && asCell() && asCell()->isZombie();
+    }
+#endif
 } // namespace JSC
 
 #endif // JSCell_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.cpp
index bf4e34d..d213b4a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.cpp
@@ -50,13 +50,13 @@ bool JSFunction::isHostFunctionNonInline() const
     return isHostFunction();
 }
 
-JSFunction::JSFunction(PassRefPtr<Structure> structure)
+JSFunction::JSFunction(NonNullPassRefPtr<Structure> structure)
     : Base(structure)
     , m_executable(adoptRef(new VPtrHackExecutable()))
 {
 }
 
-JSFunction::JSFunction(ExecState* exec, PassRefPtr<Structure> structure, int length, const Identifier& name, NativeFunction func)
+JSFunction::JSFunction(ExecState* exec, NonNullPassRefPtr<Structure> structure, int length, const Identifier& name, NativeFunction func)
     : Base(&exec->globalData(), structure, name)
 #if ENABLE(JIT)
     , m_executable(adoptRef(new NativeExecutable(exec)))
@@ -72,7 +72,7 @@ JSFunction::JSFunction(ExecState* exec, PassRefPtr<Structure> structure, int len
 #endif
 }
 
-JSFunction::JSFunction(ExecState* exec, PassRefPtr<FunctionExecutable> executable, ScopeChainNode* scopeChainNode)
+JSFunction::JSFunction(ExecState* exec, NonNullPassRefPtr<FunctionExecutable> executable, ScopeChainNode* scopeChainNode)
     : Base(&exec->globalData(), exec->lexicalGlobalObject()->functionStructure(), executable->name())
     , m_executable(executable)
 {
@@ -81,6 +81,8 @@ JSFunction::JSFunction(ExecState* exec, PassRefPtr<FunctionExecutable> executabl
 
 JSFunction::~JSFunction()
 {
+    ASSERT(vptr() == JSGlobalData::jsFunctionVPtr);
+
     // JIT code for other functions may have had calls linked directly to the code for this function; these links
     // are based on a check for the this pointer value for this JSFunction - which will no longer be valid once
     // this memory is freed and may be reused (potentially for another, different JSFunction).
@@ -206,6 +208,17 @@ bool JSFunction::getOwnPropertySlot(ExecState* exec, const Identifier& propertyN
         return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
     }
     
+void JSFunction::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
+{
+    if (!isHostFunction() && (mode == IncludeDontEnumProperties)) {
+        propertyNames.add(exec->propertyNames().arguments);
+        propertyNames.add(exec->propertyNames().callee);
+        propertyNames.add(exec->propertyNames().caller);
+        propertyNames.add(exec->propertyNames().length);
+    }
+    Base::getOwnPropertyNames(exec, propertyNames, mode);
+}
+
 void JSFunction::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
 {
     if (isHostFunction()) {
@@ -217,13 +230,13 @@ void JSFunction::put(ExecState* exec, const Identifier& propertyName, JSValue va
     Base::put(exec, propertyName, value, slot);
 }
 
-bool JSFunction::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool JSFunction::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
     if (isHostFunction())
-        return Base::deleteProperty(exec, propertyName, checkDontDelete);
+        return Base::deleteProperty(exec, propertyName);
     if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length)
         return false;
-    return Base::deleteProperty(exec, propertyName, checkDontDelete);
+    return Base::deleteProperty(exec, propertyName);
 }
 
 // ECMA 13.2.2 [[Construct]]
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.h
index 416a58a..bdb79b8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.h
@@ -36,13 +36,13 @@ namespace JSC {
 
     class JSFunction : public InternalFunction {
         friend class JIT;
-        friend struct VPtrSet;
+        friend class JSGlobalData;
 
         typedef InternalFunction Base;
 
     public:
-        JSFunction(ExecState*, PassRefPtr<Structure>, int length, const Identifier&, NativeFunction);
-        JSFunction(ExecState*, PassRefPtr<FunctionExecutable>, ScopeChainNode*);
+        JSFunction(ExecState*, NonNullPassRefPtr<Structure>, int length, const Identifier&, NativeFunction);
+        JSFunction(ExecState*, NonNullPassRefPtr<FunctionExecutable>, ScopeChainNode*);
         virtual ~JSFunction();
 
         JSObject* construct(ExecState*, const ArgList&);
@@ -61,26 +61,30 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype) 
         { 
-            return Structure::create(prototype, TypeInfo(ObjectType, ImplementsHasInstance)); 
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags)); 
         }
 
         NativeFunction nativeFunction()
         {
-            return *reinterpret_cast<NativeFunction*>(m_data);
+            return *WTF::bitwise_cast<NativeFunction*>(m_data);
         }
 
         virtual ConstructType getConstructData(ConstructData&);
         virtual CallType getCallData(CallData&);
 
+    protected:
+        const static unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | InternalFunction::StructureFlags;
+
     private:
-        JSFunction(PassRefPtr<Structure>);
+        JSFunction(NonNullPassRefPtr<Structure>);
 
         bool isHostFunctionNonInline() const;
 
         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
         virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
 
         virtual void markChildren(MarkStack&);
 
@@ -94,7 +98,7 @@ namespace JSC {
         ScopeChain& scopeChain()
         {
             ASSERT(!isHostFunctionNonInline());
-            return *reinterpret_cast<ScopeChain*>(m_data);
+            return *WTF::bitwise_cast<ScopeChain*>(m_data);
         }
         void clearScopeChain()
         {
@@ -109,11 +113,11 @@ namespace JSC {
         void setScopeChain(const ScopeChain& sc)
         {
             ASSERT(!isHostFunctionNonInline());
-            *reinterpret_cast<ScopeChain*>(m_data) = sc;
+            *WTF::bitwise_cast<ScopeChain*>(m_data) = sc;
         }
         void setNativeFunction(NativeFunction func)
         {
-            *reinterpret_cast<NativeFunction*>(m_data) = func;
+            *WTF::bitwise_cast<NativeFunction*>(m_data) = func;
         }
         unsigned char m_data[sizeof(void*)];
     };
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.cpp
index 4496d6c..34b5f82 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.cpp
@@ -45,10 +45,10 @@
 #include "JSNotAnObject.h"
 #include "JSPropertyNameIterator.h"
 #include "JSStaticScopeObject.h"
-#include "Parser.h"
 #include "Lexer.h"
 #include "Lookup.h"
 #include "Nodes.h"
+#include "Parser.h"
 
 #if ENABLE(JSC_MULTIPLE_THREADS)
 #include <wtf/Threading.h>
@@ -71,40 +71,38 @@ extern JSC_CONST_HASHTABLE HashTable regExpTable;
 extern JSC_CONST_HASHTABLE HashTable regExpConstructorTable;
 extern JSC_CONST_HASHTABLE HashTable stringTable;
 
-struct VPtrSet {
-    VPtrSet();
-
-    void* jsArrayVPtr;
-    void* jsByteArrayVPtr;
-    void* jsStringVPtr;
-    void* jsFunctionVPtr;
-};
+void* JSGlobalData::jsArrayVPtr;
+void* JSGlobalData::jsByteArrayVPtr;
+void* JSGlobalData::jsStringVPtr;
+void* JSGlobalData::jsFunctionVPtr;
 
-VPtrSet::VPtrSet()
+void JSGlobalData::storeVPtrs()
 {
-    // Bizarrely, calling fastMalloc here is faster than allocating space on the stack.
-    void* storage = fastMalloc(sizeof(CollectorBlock));
+    CollectorCell cell;
+    void* storage = &cell;
 
+    COMPILE_ASSERT(sizeof(JSArray) <= sizeof(CollectorCell), sizeof_JSArray_must_be_less_than_CollectorCell);
     JSCell* jsArray = new (storage) JSArray(JSArray::createStructure(jsNull()));
-    jsArrayVPtr = jsArray->vptr();
+    JSGlobalData::jsArrayVPtr = jsArray->vptr();
     jsArray->~JSCell();
 
+    COMPILE_ASSERT(sizeof(JSByteArray) <= sizeof(CollectorCell), sizeof_JSByteArray_must_be_less_than_CollectorCell);
     JSCell* jsByteArray = new (storage) JSByteArray(JSByteArray::VPtrStealingHack);
-    jsByteArrayVPtr = jsByteArray->vptr();
+    JSGlobalData::jsByteArrayVPtr = jsByteArray->vptr();
     jsByteArray->~JSCell();
 
+    COMPILE_ASSERT(sizeof(JSString) <= sizeof(CollectorCell), sizeof_JSString_must_be_less_than_CollectorCell);
     JSCell* jsString = new (storage) JSString(JSString::VPtrStealingHack);
-    jsStringVPtr = jsString->vptr();
+    JSGlobalData::jsStringVPtr = jsString->vptr();
     jsString->~JSCell();
 
+    COMPILE_ASSERT(sizeof(JSFunction) <= sizeof(CollectorCell), sizeof_JSFunction_must_be_less_than_CollectorCell);
     JSCell* jsFunction = new (storage) JSFunction(JSFunction::createStructure(jsNull()));
-    jsFunctionVPtr = jsFunction->vptr();
+    JSGlobalData::jsFunctionVPtr = jsFunction->vptr();
     jsFunction->~JSCell();
-
-    fastFree(storage);
 }
 
-JSGlobalData::JSGlobalData(bool isShared, const VPtrSet& vptrSet)
+JSGlobalData::JSGlobalData(bool isShared)
     : isSharedInstance(isShared)
     , clientData(0)
     , arrayTable(fastNew<HashTable>(JSC::arrayTable))
@@ -124,13 +122,10 @@ JSGlobalData::JSGlobalData(bool isShared, const VPtrSet& vptrSet)
     , propertyNameIteratorStructure(JSPropertyNameIterator::createStructure(jsNull()))
     , getterSetterStructure(GetterSetter::createStructure(jsNull()))
     , apiWrapperStructure(JSAPIValueWrapper::createStructure(jsNull()))
+    , dummyMarkableCellStructure(JSCell::createDummyStructure())
 #if USE(JSVALUE32)
     , numberStructure(JSNumberCell::createStructure(jsNull()))
 #endif
-    , jsArrayVPtr(vptrSet.jsArrayVPtr)
-    , jsByteArrayVPtr(vptrSet.jsByteArrayVPtr)
-    , jsStringVPtr(vptrSet.jsStringVPtr)
-    , jsFunctionVPtr(vptrSet.jsFunctionVPtr)
     , identifierTable(createIdentifierTable())
     , propertyNames(new CommonIdentifiers(this))
     , emptyList(new MarkedArgumentBuffer)
@@ -147,7 +142,9 @@ JSGlobalData::JSGlobalData(bool isShared, const VPtrSet& vptrSet)
     , dynamicGlobalObject(0)
     , functionCodeBlockBeingReparsed(0)
     , firstStringifierToMark(0)
-    , markStack(vptrSet.jsArrayVPtr)
+    , markStack(jsArrayVPtr)
+    , cachedUTCOffset(NaN)
+    , weakRandom(static_cast<int>(currentTime()))
 #ifndef NDEBUG
     , mainThreadOnly(false)
 #endif
@@ -199,9 +196,17 @@ JSGlobalData::~JSGlobalData()
     delete clientData;
 }
 
-PassRefPtr<JSGlobalData> JSGlobalData::create(bool isShared)
+PassRefPtr<JSGlobalData> JSGlobalData::createNonDefault()
+{
+    return adoptRef(new JSGlobalData(false));
+}
+
+PassRefPtr<JSGlobalData> JSGlobalData::create()
 {
-    return adoptRef(new JSGlobalData(isShared, VPtrSet()));
+    JSGlobalData* globalData = new JSGlobalData(false);
+    setDefaultIdentifierTable(globalData->identifierTable);
+    setCurrentIdentifierTable(globalData->identifierTable);
+    return adoptRef(globalData);
 }
 
 PassRefPtr<JSGlobalData> JSGlobalData::createLeaked()
@@ -221,7 +226,7 @@ JSGlobalData& JSGlobalData::sharedInstance()
 {
     JSGlobalData*& instance = sharedInstanceInternal();
     if (!instance) {
-        instance = create(true).releaseRef();
+        instance = new JSGlobalData(true);
 #if ENABLE(JSC_MULTIPLE_THREADS)
         instance->makeUsableFromMultipleThreads();
 #endif
@@ -253,4 +258,27 @@ JSGlobalData::ClientData::~ClientData()
 {
 }
 
+void JSGlobalData::resetDateCache()
+{
+    cachedUTCOffset = NaN;
+    dstOffsetCache.reset();
+    cachedDateString = UString();
+    dateInstanceCache.reset();
+}
+
+void JSGlobalData::startSampling()
+{
+    interpreter->startSampling();
+}
+
+void JSGlobalData::stopSampling()
+{
+    interpreter->stopSampling();
+}
+
+void JSGlobalData::dumpSampleData(ExecState* exec)
+{
+    interpreter->dumpSampleData(exec);
+}
+
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.h
index c9887e8..49a6c4c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalData.h
@@ -30,6 +30,7 @@
 #define JSGlobalData_h
 
 #include "Collector.h"
+#include "DateInstanceCache.h"
 #include "ExecutableAllocator.h"
 #include "JITStubs.h"
 #include "JSValue.h"
@@ -37,6 +38,7 @@
 #include "NumericStrings.h"
 #include "SmallStrings.h"
 #include "TimeoutChecker.h"
+#include "WeakRandom.h"
 #include <wtf/Forward.h>
 #include <wtf/HashMap.h>
 #include <wtf/RefCounted.h>
@@ -60,7 +62,26 @@ namespace JSC {
 
     struct HashTable;
     struct Instruction;    
-    struct VPtrSet;
+
+    struct DSTOffsetCache {
+        DSTOffsetCache()
+        {
+            reset();
+        }
+        
+        void reset()
+        {
+            offset = 0.0;
+            start = 0.0;
+            end = -1.0;
+            increment = 0.0;
+        }
+
+        double offset;
+        double start;
+        double end;
+        double increment;
+    };
 
     class JSGlobalData : public RefCounted<JSGlobalData> {
     public:
@@ -74,8 +95,9 @@ namespace JSC {
         static bool sharedInstanceExists();
         static JSGlobalData& sharedInstance();
 
-        static PassRefPtr<JSGlobalData> create(bool isShared = false);
+        static PassRefPtr<JSGlobalData> create();
         static PassRefPtr<JSGlobalData> createLeaked();
+        static PassRefPtr<JSGlobalData> createNonDefault();
         ~JSGlobalData();
 
 #if ENABLE(JSC_MULTIPLE_THREADS)
@@ -104,22 +126,25 @@ namespace JSC {
         RefPtr<Structure> propertyNameIteratorStructure;
         RefPtr<Structure> getterSetterStructure;
         RefPtr<Structure> apiWrapperStructure;
+        RefPtr<Structure> dummyMarkableCellStructure;
 
 #if USE(JSVALUE32)
         RefPtr<Structure> numberStructure;
 #endif
 
-        void* jsArrayVPtr;
-        void* jsByteArrayVPtr;
-        void* jsStringVPtr;
-        void* jsFunctionVPtr;
+        static void storeVPtrs();
+        static JS_EXPORTDATA void* jsArrayVPtr;
+        static JS_EXPORTDATA void* jsByteArrayVPtr;
+        static JS_EXPORTDATA void* jsStringVPtr;
+        static JS_EXPORTDATA void* jsFunctionVPtr;
 
         IdentifierTable* identifierTable;
         CommonIdentifiers* propertyNames;
         const MarkedArgumentBuffer* emptyList; // Lists are supposed to be allocated on the stack to have their elements properly marked, which is not the case here - but this list has nothing to mark.
         SmallStrings smallStrings;
         NumericStrings numericStrings;
-
+        DateInstanceCache dateInstanceCache;
+        
 #if ENABLE(ASSEMBLER)
         ExecutableAllocator executableAllocator;
 #endif
@@ -154,16 +179,29 @@ namespace JSC {
 
         MarkStack markStack;
 
+        double cachedUTCOffset;
+        DSTOffsetCache dstOffsetCache;
+        
+        UString cachedDateString;
+        double cachedDateStringValue;
+        
+        WeakRandom weakRandom;
+
 #ifndef NDEBUG
         bool mainThreadOnly;
 #endif
 
+        void resetDateCache();
+
+        void startSampling();
+        void stopSampling();
+        void dumpSampleData(ExecState* exec);
     private:
-        JSGlobalData(bool isShared, const VPtrSet&);
+        JSGlobalData(bool isShared);
         static JSGlobalData*& sharedInstanceInternal();
         void createNativeThunk();
     };
-
+    
 } // namespace JSC
 
 #endif // JSGlobalData_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.cpp
index 60eb1b4..a2e9928 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.cpp
@@ -89,7 +89,7 @@ static inline void markIfNeeded(MarkStack& markStack, JSValue v)
 static inline void markIfNeeded(MarkStack& markStack, const RefPtr<Structure>& s)
 {
     if (s)
-        s->markAggregate(markStack);
+        markIfNeeded(markStack, s->storedPrototype());
 }
 
 JSGlobalObject::~JSGlobalObject()
@@ -121,15 +121,17 @@ JSGlobalObject::~JSGlobalObject()
         registerFile.setGlobalObject(0);
         registerFile.setNumGlobals(0);
     }
-    delete d();
+    d()->destructor(d());
 }
 
 void JSGlobalObject::init(JSObject* thisValue)
 {
     ASSERT(JSLock::currentThreadIsHoldingLock());
 
+    structure()->disableSpecificFunctionTracking();
+
     d()->globalData = Heap::heap(this)->globalData();
-    d()->globalScopeChain = ScopeChain(this, d()->globalData.get(), thisValue);
+    d()->globalScopeChain = ScopeChain(this, d()->globalData.get(), this, thisValue);
 
     JSGlobalObject::globalExec()->init(0, 0, d()->globalScopeChain.node(), CallFrame::noCaller(), 0, 0, 0);
 
@@ -396,6 +398,21 @@ void JSGlobalObject::markChildren(MarkStack& markStack)
     markIfNeeded(markStack, d()->methodCallDummy);
 
     markIfNeeded(markStack, d()->errorStructure);
+    markIfNeeded(markStack, d()->argumentsStructure);
+    markIfNeeded(markStack, d()->arrayStructure);
+    markIfNeeded(markStack, d()->booleanObjectStructure);
+    markIfNeeded(markStack, d()->callbackConstructorStructure);
+    markIfNeeded(markStack, d()->callbackFunctionStructure);
+    markIfNeeded(markStack, d()->callbackObjectStructure);
+    markIfNeeded(markStack, d()->dateStructure);
+    markIfNeeded(markStack, d()->emptyObjectStructure);
+    markIfNeeded(markStack, d()->errorStructure);
+    markIfNeeded(markStack, d()->functionStructure);
+    markIfNeeded(markStack, d()->numberObjectStructure);
+    markIfNeeded(markStack, d()->prototypeFunctionStructure);
+    markIfNeeded(markStack, d()->regExpMatchesArrayStructure);
+    markIfNeeded(markStack, d()->regExpStructure);
+    markIfNeeded(markStack, d()->stringObjectStructure);
 
     // No need to mark the other structures, because their prototypes are all
     // guaranteed to be referenced elsewhere.
@@ -450,11 +467,12 @@ void JSGlobalObject::copyGlobalsTo(RegisterFile& registerFile)
 
 void* JSGlobalObject::operator new(size_t size, JSGlobalData* globalData)
 {
-#ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
-    return globalData->heap.inlineAllocate(size);
-#else
     return globalData->heap.allocate(size);
-#endif
+}
+
+void JSGlobalObject::destroyJSGlobalObjectData(void* jsGlobalObjectData)
+{
+    delete static_cast<JSGlobalObjectData*>(jsGlobalObjectData);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.h
index 7459c2e..340e04d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObject.h
@@ -22,6 +22,7 @@
 #ifndef JSGlobalObject_h
 #define JSGlobalObject_h
 
+#include "JSArray.h"
 #include "JSGlobalData.h"
 #include "JSVariableObject.h"
 #include "NativeFunctionWrapper.h"
@@ -52,14 +53,22 @@ namespace JSC {
     struct HashTable;
 
     typedef Vector<ExecState*, 16> ExecStateStack;
-
+    
     class JSGlobalObject : public JSVariableObject {
     protected:
         using JSVariableObject::JSVariableObjectData;
 
         struct JSGlobalObjectData : public JSVariableObjectData {
-            JSGlobalObjectData()
+            // We use an explicit destructor function pointer instead of a
+            // virtual destructor because we want to avoid adding a vtable
+            // pointer to this struct. Adding a vtable pointer would force the
+            // compiler to emit costly pointer fixup code when casting from
+            // JSVariableObjectData* to JSGlobalObjectData*.
+            typedef void (*Destructor)(void*);
+
+            JSGlobalObjectData(Destructor destructor)
                 : JSVariableObjectData(&symbolTable, 0)
+                , destructor(destructor)
                 , registerArraySize(0)
                 , globalScopeChain(NoScopeChain())
                 , regExpConstructor(0)
@@ -85,10 +94,8 @@ namespace JSC {
             {
             }
             
-            virtual ~JSGlobalObjectData()
-            {
-            }
-
+            Destructor destructor;
+            
             size_t registerArraySize;
 
             JSGlobalObject* next;
@@ -153,13 +160,13 @@ namespace JSC {
         void* operator new(size_t, JSGlobalData*);
 
         explicit JSGlobalObject()
-            : JSVariableObject(JSGlobalObject::createStructure(jsNull()), new JSGlobalObjectData)
+            : JSVariableObject(JSGlobalObject::createStructure(jsNull()), new JSGlobalObjectData(destroyJSGlobalObjectData))
         {
             init(this);
         }
 
     protected:
-        JSGlobalObject(PassRefPtr<Structure> structure, JSGlobalObjectData* data, JSObject* thisValue)
+        JSGlobalObject(NonNullPassRefPtr<Structure> structure, JSGlobalObjectData* data, JSObject* thisValue)
             : JSVariableObject(structure, data)
         {
             init(thisValue);
@@ -229,10 +236,7 @@ namespace JSC {
         unsigned profileGroup() const { return d()->profileGroup; }
 
         Debugger* debugger() const { return d()->debugger; }
-        void setDebugger(Debugger* debugger)
-        {
-            d()->debugger = debugger;
-        }
+        void setDebugger(Debugger* debugger) { d()->debugger = debugger; }
         
         virtual bool supportsProfiling() const { return false; }
         
@@ -264,10 +268,13 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
     protected:
+
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
+
         struct GlobalPropertyInfo {
             GlobalPropertyInfo(const Identifier& i, JSValue v, unsigned a)
                 : identifier(i)
@@ -283,6 +290,8 @@ namespace JSC {
         void addStaticGlobals(GlobalPropertyInfo*, int count);
 
     private:
+        static void destroyJSGlobalObjectData(void*);
+
         // FIXME: Fold reset into init.
         void init(JSObject* thisValue);
         void reset(JSValue prototype);
@@ -347,14 +356,6 @@ namespace JSC {
         return symbolTableGet(propertyName, slot, slotIsWriteable);
     }
 
-    inline JSGlobalObject* ScopeChainNode::globalObject() const
-    {
-        const ScopeChainNode* n = this;
-        while (n->next)
-            n = n->next;
-        return asGlobalObject(n->object);
-    }
-
     inline JSValue Structure::prototypeForLookup(ExecState* exec) const
     {
         if (typeInfo().type() == ObjectType)
@@ -409,13 +410,46 @@ namespace JSC {
         return globalData().dynamicGlobalObject;
     }
 
+    inline JSObject* constructEmptyObject(ExecState* exec)
+    {
+        return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure());
+    }
+
+    inline JSArray* constructEmptyArray(ExecState* exec)
+    {
+        return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure());
+    }
+
+    inline JSArray* constructEmptyArray(ExecState* exec, unsigned initialLength)
+    {
+        return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), initialLength);
+    }
+
+    inline JSArray* constructArray(ExecState* exec, JSValue singleItemValue)
+    {
+        MarkedArgumentBuffer values;
+        values.append(singleItemValue);
+        return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), values);
+    }
+
+    inline JSArray* constructArray(ExecState* exec, const ArgList& values)
+    {
+        return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), values);
+    }
+
     class DynamicGlobalObjectScope : public Noncopyable {
     public:
         DynamicGlobalObjectScope(CallFrame* callFrame, JSGlobalObject* dynamicGlobalObject) 
             : m_dynamicGlobalObjectSlot(callFrame->globalData().dynamicGlobalObject)
             , m_savedDynamicGlobalObject(m_dynamicGlobalObjectSlot)
         {
-            m_dynamicGlobalObjectSlot = dynamicGlobalObject;
+            if (!m_dynamicGlobalObjectSlot) {
+                m_dynamicGlobalObjectSlot = dynamicGlobalObject;
+
+                // Reset the date cache between JS invocations to force the VM
+                // to observe time zone changes.
+                callFrame->globalData().resetDateCache();
+            }
         }
 
         ~DynamicGlobalObjectScope()
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp
index 5ded370..0bc1274 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp
@@ -27,14 +27,16 @@
 
 #include "CallFrame.h"
 #include "GlobalEvalFunction.h"
+#include "Interpreter.h"
 #include "JSGlobalObject.h"
-#include "LiteralParser.h"
 #include "JSString.h"
-#include "Interpreter.h"
-#include "Parser.h"
-#include "dtoa.h"
 #include "Lexer.h"
+#include "LiteralParser.h"
 #include "Nodes.h"
+#include "Parser.h"
+#include "StringBuilder.h"
+#include "StringExtras.h"
+#include "dtoa.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -55,24 +57,24 @@ static JSValue encode(ExecState* exec, const ArgList& args, const char* doNotEsc
     if (!cstr.c_str())
         return throwError(exec, URIError, "String contained an illegal UTF-16 sequence.");
 
-    UString result = "";
+    StringBuilder builder;
     const char* p = cstr.c_str();
     for (size_t k = 0; k < cstr.size(); k++, p++) {
         char c = *p;
         if (c && strchr(doNotEscape, c))
-            result.append(c);
+            builder.append(c);
         else {
             char tmp[4];
-            sprintf(tmp, "%%%02X", static_cast<unsigned char>(c));
-            result += tmp;
+            snprintf(tmp, 4, "%%%02X", static_cast<unsigned char>(c));
+            builder.append((const char*)tmp);
         }
     }
-    return jsString(exec, result);
+    return jsString(exec, builder.release());
 }
 
 static JSValue decode(ExecState* exec, const ArgList& args, const char* doNotUnescape, bool strict)
 {
-    UString result = "";
+    StringBuilder builder;
     UString str = args.at(0).toString(exec);
     int k = 0;
     int len = str.size();
@@ -106,7 +108,7 @@ static JSValue decode(ExecState* exec, const ArgList& args, const char* doNotUne
                             charLen = 0;
                         else if (character >= 0x10000) {
                             // Convert to surrogate pair.
-                            result.append(static_cast<UChar>(0xD800 | ((character - 0x10000) >> 10)));
+                            builder.append(static_cast<UChar>(0xD800 | ((character - 0x10000) >> 10)));
                             u = static_cast<UChar>(0xDC00 | ((character - 0x10000) & 0x3FF));
                         } else
                             u = static_cast<UChar>(character);
@@ -131,9 +133,9 @@ static JSValue decode(ExecState* exec, const ArgList& args, const char* doNotUne
             }
         }
         k++;
-        result.append(c);
+        builder.append(c);
     }
-    return jsString(exec, result);
+    return jsString(exec, builder.release());
 }
 
 bool isStrWhiteSpace(UChar c)
@@ -286,12 +288,12 @@ JSValue JSC_HOST_CALL globalFuncEval(ExecState* exec, JSObject* function, JSValu
     if (JSValue parsedObject = preparser.tryLiteralParse())
         return parsedObject;
 
-    EvalExecutable eval(exec, makeSource(s));
-    JSObject* error = eval.compile(exec, static_cast<JSGlobalObject*>(unwrappedObject)->globalScopeChain().node());
+    RefPtr<EvalExecutable> eval = EvalExecutable::create(exec, makeSource(s));
+    JSObject* error = eval->compile(exec, static_cast<JSGlobalObject*>(unwrappedObject)->globalScopeChain().node());
     if (error)
         return throwError(exec, error);
 
-    return exec->interpreter()->execute(&eval, exec, thisObject, static_cast<JSGlobalObject*>(unwrappedObject)->globalScopeChain().node(), exec->exceptionSlot());
+    return exec->interpreter()->execute(eval.get(), exec, thisObject, static_cast<JSGlobalObject*>(unwrappedObject)->globalScopeChain().node(), exec->exceptionSlot());
 }
 
 JSValue JSC_HOST_CALL globalFuncParseInt(ExecState* exec, JSObject*, JSValue, const ArgList& args)
@@ -376,7 +378,7 @@ JSValue JSC_HOST_CALL globalFuncEscape(ExecState* exec, JSObject*, JSValue, cons
         "0123456789"
         "*+-./@_";
 
-    UString result = "";
+    StringBuilder builder;
     UString s;
     UString str = args.at(0).toString(exec);
     const UChar* c = str.data();
@@ -393,15 +395,15 @@ JSValue JSC_HOST_CALL globalFuncEscape(ExecState* exec, JSObject*, JSValue, cons
             sprintf(tmp, "%%%02X", u);
             s = UString(tmp);
         }
-        result += s;
+        builder.append(s);
     }
 
-    return jsString(exec, result);
+    return jsString(exec, builder.release());
 }
 
 JSValue JSC_HOST_CALL globalFuncUnescape(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    UString result = "";
+    StringBuilder builder;
     UString str = args.at(0).toString(exec);
     int k = 0;
     int len = str.size();
@@ -420,10 +422,10 @@ JSValue JSC_HOST_CALL globalFuncUnescape(ExecState* exec, JSObject*, JSValue, co
             k += 2;
         }
         k++;
-        result.append(*c);
+        builder.append(*c);
     }
 
-    return jsString(exec, result);
+    return jsString(exec, builder.release());
 }
 
 #ifndef NDEBUG
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.cpp
index 321762a..f4764e2 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.cpp
@@ -121,7 +121,7 @@ bool JSNotAnObject::deleteProperty(ExecState* exec, unsigned)
     return false;
 }
 
-void JSNotAnObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray&, bool)
+void JSNotAnObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray&, EnumerationMode)
 {
     ASSERT_UNUSED(exec, exec->hadException() && exec->exception() == m_exception);
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.h
index 57347af..d5f430c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNotAnObject.h
@@ -62,10 +62,13 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
      private:
+        
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags;
+
         // JSValue methods
         virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const;
         virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue&);
@@ -88,7 +91,7 @@ namespace JSC {
         virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
         virtual bool deleteProperty(ExecState*, unsigned propertyName);
 
-        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, bool includeNonEnumerable = false);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
 
         JSNotAnObjectErrorStub* m_exception;
     };
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNumberCell.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNumberCell.h
index 6a48081..e9e2470 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNumberCell.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSNumberCell.h
@@ -68,23 +68,15 @@ namespace JSC {
 
         void* operator new(size_t size, ExecState* exec)
         {
-    #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
-            return exec->heap()->inlineAllocateNumber(size);
-    #else
             return exec->heap()->allocateNumber(size);
-    #endif
         }
 
         void* operator new(size_t size, JSGlobalData* globalData)
         {
-    #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
-            return globalData->heap.inlineAllocateNumber(size);
-    #else
             return globalData->heap.allocateNumber(size);
-    #endif
         }
 
-        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(NumberType, NeedsThisConversion | HasDefaultMark)); }
+        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(NumberType, OverridesGetOwnPropertySlot | NeedsThisConversion)); }
 
     private:
         JSNumberCell(JSGlobalData* globalData, double value)
@@ -117,6 +109,11 @@ namespace JSC {
         return static_cast<JSNumberCell*>(v.asCell());
     }
 
+    ALWAYS_INLINE JSValue::JSValue(EncodeAsDoubleTag, ExecState* exec, double d)
+    {
+        *this = jsNumberCell(exec, d);
+    }
+
     inline JSValue::JSValue(ExecState* exec, double d)
     {
         JSValue v = JSImmediate::from(d);
@@ -201,6 +198,11 @@ namespace JSC {
 #endif // USE(JSVALUE32)
 
 #if USE(JSVALUE64)
+    ALWAYS_INLINE JSValue::JSValue(EncodeAsDoubleTag, ExecState*, double d)
+    {
+        *this = JSImmediate::fromNumberOutsideIntegerRange(d);
+    }
+
     inline JSValue::JSValue(ExecState*, double d)
     {
         JSValue v = JSImmediate::from(d);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.cpp
index 377c9d1..b089584 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.cpp
@@ -32,6 +32,7 @@
 #include "JSArray.h"
 #include "LiteralParser.h"
 #include "PropertyNameArray.h"
+#include "StringBuilder.h"
 #include <wtf/MathExtras.h>
 
 namespace JSC {
@@ -70,8 +71,6 @@ public:
     void markAggregate(MarkStack&);
 
 private:
-    typedef UString StringBuilder;
-
     class Holder {
     public:
         Holder(JSObject*);
@@ -156,7 +155,7 @@ static inline UString gap(ExecState* exec, JSValue space)
     }
 
     // If the space value is a string, use it as the gap string, otherwise use no gap string.
-    UString spaces = space.getString();
+    UString spaces = space.getString(exec);
     if (spaces.size() > maxGapLength) {
         spaces = spaces.substr(0, maxGapLength);
     }
@@ -213,7 +212,7 @@ Stringifier::Stringifier(ExecState* exec, JSValue replacer, JSValue space)
                 break;
 
             UString propertyName;
-            if (name.getString(propertyName)) {
+            if (name.getString(exec, propertyName)) {
                 m_arrayReplacerPropertyNames.add(Identifier(exec, propertyName));
                 continue;
             }
@@ -269,7 +268,7 @@ JSValue Stringifier::stringify(JSValue value)
     if (m_exec->hadException())
         return jsNull();
 
-    return jsString(m_exec, result);
+    return jsString(m_exec, result.release());
 }
 
 void Stringifier::appendQuotedString(StringBuilder& builder, const UString& value)
@@ -389,7 +388,7 @@ Stringifier::StringifyResult Stringifier::appendStringifiedValue(StringBuilder&
     }
 
     UString stringValue;
-    if (value.getString(stringValue)) {
+    if (value.getString(m_exec, stringValue)) {
         appendQuotedString(builder, stringValue);
         return StringifySucceeded;
     }
@@ -461,7 +460,7 @@ inline void Stringifier::indent()
     // Use a single shared string, m_repeatedGap, so we don't keep allocating new ones as we indent and unindent.
     int newSize = m_indent.size() + m_gap.size();
     if (newSize > m_repeatedGap.size())
-        m_repeatedGap.append(m_gap);
+        m_repeatedGap = makeString(m_repeatedGap, m_gap);
     ASSERT(newSize <= m_repeatedGap.size());
     m_indent = m_repeatedGap.substr(0, newSize);
 }
@@ -504,7 +503,7 @@ bool Stringifier::Holder::appendNextProperty(Stringifier& stringifier, StringBui
                 m_propertyNames = stringifier.m_arrayReplacerPropertyNames.data();
             else {
                 PropertyNameArray objectPropertyNames(exec);
-                m_object->getPropertyNames(exec, objectPropertyNames);
+                m_object->getOwnPropertyNames(exec, objectPropertyNames);
                 m_propertyNames = objectPropertyNames.releaseData();
             }
             m_size = m_propertyNames->propertyNameVector().size();
@@ -588,7 +587,7 @@ bool Stringifier::Holder::appendNextProperty(Stringifier& stringifier, StringBui
             // This only occurs when get an undefined value for an object property.
             // In this case we don't want the separator and property name that we
             // already appended, so roll back.
-            builder = builder.substr(0, rollBackPoint);
+            builder.resize(rollBackPoint);
             break;
     }
 
@@ -750,7 +749,7 @@ NEVER_INLINE JSValue Walker::walk(JSValue unfiltered)
                 objectStack.append(object);
                 indexStack.append(0);
                 propertyStack.append(PropertyNameArray(m_exec));
-                object->getPropertyNames(m_exec, propertyStack.last());
+                object->getOwnPropertyNames(m_exec, propertyStack.last());
                 // fallthrough
             }
             objectStartVisitMember:
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.h
index 0705a69..ec3fa40 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSONObject.h
@@ -34,18 +34,21 @@ namespace JSC {
 
     class JSONObject : public JSObject {
     public:
-        JSONObject(PassRefPtr<Structure> structure)
+        JSONObject(NonNullPassRefPtr<Structure> structure)
             : JSObject(structure)
         {
         }
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasDefaultMark | HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
         static void markStringifiers(MarkStack&, Stringifier*);
 
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | JSObject::StructureFlags;
+
     private:
         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.cpp
index 01f74ac..c6835fe 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.cpp
@@ -42,6 +42,25 @@ namespace JSC {
 
 ASSERT_CLASS_FITS_IN_CELL(JSObject);
 
+static inline void getClassPropertyNames(ExecState* exec, const ClassInfo* classInfo, PropertyNameArray& propertyNames, EnumerationMode mode)
+{
+    // Add properties from the static hashtables of properties
+    for (; classInfo; classInfo = classInfo->parentClass) {
+        const HashTable* table = classInfo->propHashTable(exec);
+        if (!table)
+            continue;
+        table->initializeIfNeeded(exec);
+        ASSERT(table->table);
+
+        int hashSizeMask = table->compactSize - 1;
+        const HashEntry* entry = table->table;
+        for (int i = 0; i <= hashSizeMask; ++i, ++entry) {
+            if (entry->key() && (!(entry->attributes() & DontEnum) || (mode == IncludeDontEnumProperties)))
+                propertyNames.add(entry->key());
+        }
+    }
+}
+
 void JSObject::markChildren(MarkStack& markStack)
 {
 #ifndef NDEBUG
@@ -187,12 +206,12 @@ bool JSObject::hasProperty(ExecState* exec, unsigned propertyName) const
 }
 
 // ECMA 8.6.2.5
-bool JSObject::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool JSObject::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
     unsigned attributes;
     JSCell* specificValue;
     if (m_structure->get(propertyName, attributes, specificValue) != WTF::notFound) {
-        if ((attributes & DontDelete) && checkDontDelete)
+        if ((attributes & DontDelete))
             return false;
         removeDirect(propertyName);
         return true;
@@ -200,7 +219,7 @@ bool JSObject::deleteProperty(ExecState* exec, const Identifier& propertyName, b
 
     // Look in the static hashtable of properties
     const HashEntry* entry = findPropertyHashEntry(exec, propertyName);
-    if (entry && (entry->attributes() & DontDelete) && checkDontDelete)
+    if (entry && entry->attributes() & DontDelete)
         return false; // this builtin property can't be deleted
 
     // FIXME: Should the code here actually do some deletion?
@@ -213,9 +232,9 @@ bool JSObject::hasOwnProperty(ExecState* exec, const Identifier& propertyName) c
     return const_cast<JSObject*>(this)->getOwnPropertySlot(exec, propertyName, slot);
 }
 
-bool JSObject::deleteProperty(ExecState* exec, unsigned propertyName, bool checkDontDelete)
+bool JSObject::deleteProperty(ExecState* exec, unsigned propertyName)
 {
-    return deleteProperty(exec, Identifier::from(exec, propertyName), checkDontDelete);
+    return deleteProperty(exec, Identifier::from(exec, propertyName));
 }
 
 static ALWAYS_INLINE JSValue callDefaultValueFunction(ExecState* exec, const JSObject* object, const Identifier& propertyName)
@@ -395,26 +414,10 @@ bool JSObject::hasInstance(ExecState* exec, JSValue value, JSValue proto)
 
 bool JSObject::propertyIsEnumerable(ExecState* exec, const Identifier& propertyName) const
 {
-    unsigned attributes;
-    if (!getPropertyAttributes(exec, propertyName, attributes))
+    PropertyDescriptor descriptor;
+    if (!const_cast<JSObject*>(this)->getOwnPropertyDescriptor(exec, propertyName, descriptor))
         return false;
-    return !(attributes & DontEnum);
-}
-
-bool JSObject::getPropertyAttributes(ExecState* exec, const Identifier& propertyName, unsigned& attributes) const
-{
-    JSCell* specificValue;
-    if (m_structure->get(propertyName, attributes, specificValue) != WTF::notFound)
-        return true;
-    
-    // Look in the static hashtable of properties
-    const HashEntry* entry = findPropertyHashEntry(exec, propertyName);
-    if (entry) {
-        attributes = entry->attributes();
-        return true;
-    }
-    
-    return false;
+    return descriptor.enumerable();
 }
 
 bool JSObject::getPropertySpecificValue(ExecState*, const Identifier& propertyName, JSCell*& specificValue) const
@@ -430,14 +433,31 @@ bool JSObject::getPropertySpecificValue(ExecState*, const Identifier& propertyNa
     return false;
 }
 
-void JSObject::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
+void JSObject::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
-    m_structure->getEnumerablePropertyNames(exec, propertyNames, this);
+    getOwnPropertyNames(exec, propertyNames, mode);
+
+    if (prototype().isNull())
+        return;
+
+    JSObject* prototype = asObject(this->prototype());
+    while(1) {
+        if (prototype->structure()->typeInfo().overridesGetPropertyNames()) {
+            prototype->getPropertyNames(exec, propertyNames, mode);
+            break;
+        }
+        prototype->getOwnPropertyNames(exec, propertyNames, mode);
+        JSValue nextProto = prototype->prototype();
+        if (nextProto.isNull())
+            break;
+        prototype = asObject(nextProto);
+    }
 }
 
-void JSObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void JSObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
-    m_structure->getOwnPropertyNames(exec, propertyNames, this, includeNonEnumerable);
+    m_structure->getPropertyNames(propertyNames, mode);
+    getClassPropertyNames(exec, classInfo(), propertyNames, mode);
 }
 
 bool JSObject::toBoolean(ExecState*) const
@@ -494,12 +514,12 @@ void JSObject::removeDirect(const Identifier& propertyName)
 
 void JSObject::putDirectFunction(ExecState* exec, InternalFunction* function, unsigned attr)
 {
-    putDirectFunction(Identifier(exec, function->name(&exec->globalData())), function, attr);
+    putDirectFunction(Identifier(exec, function->name(exec)), function, attr);
 }
 
 void JSObject::putDirectFunctionWithoutTransition(ExecState* exec, InternalFunction* function, unsigned attr)
 {
-    putDirectFunctionWithoutTransition(Identifier(exec, function->name(&exec->globalData())), function, attr);
+    putDirectFunctionWithoutTransition(Identifier(exec, function->name(exec)), function, attr);
 }
 
 NEVER_INLINE void JSObject::fillGetterPropertySlot(PropertySlot& slot, JSValue* location)
@@ -526,11 +546,6 @@ void JSObject::allocatePropertyStorage(size_t oldSize, size_t newSize)
     allocatePropertyStorageInline(oldSize, newSize);
 }
 
-JSObject* constructEmptyObject(ExecState* exec)
-{
-    return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure());
-}
-
 bool JSObject::getOwnPropertyDescriptor(ExecState*, const Identifier& propertyName, PropertyDescriptor& descriptor)
 {
     unsigned attributes = 0;
@@ -581,7 +596,7 @@ bool JSObject::defineOwnProperty(ExecState* exec, const Identifier& propertyName
     if (descriptor.isEmpty())
         return true;
 
-    if (current.equalTo(descriptor))
+    if (current.equalTo(exec, descriptor))
         return true;
 
     // Filter out invalid changes
@@ -627,7 +642,7 @@ bool JSObject::defineOwnProperty(ExecState* exec, const Identifier& propertyName
                 return false;
             }
             if (!current.writable()) {
-                if (descriptor.value() || !JSValue::strictEqual(current.value(), descriptor.value())) {
+                if (descriptor.value() || !JSValue::strictEqual(exec, current.value(), descriptor.value())) {
                     if (throwException)
                         throwError(exec, TypeError, "Attempting to change value of a readonly property.");
                     return false;
@@ -649,12 +664,12 @@ bool JSObject::defineOwnProperty(ExecState* exec, const Identifier& propertyName
     // Changing the accessor functions of an existing accessor property
     ASSERT(descriptor.isAccessorDescriptor());
     if (!current.configurable()) {
-        if (descriptor.setterPresent() && !(current.setter() && JSValue::strictEqual(current.setter(), descriptor.setter()))) {
+        if (descriptor.setterPresent() && !(current.setter() && JSValue::strictEqual(exec, current.setter(), descriptor.setter()))) {
             if (throwException)
                 throwError(exec, TypeError, "Attempting to change the setter of an unconfigurable property.");
             return false;
         }
-        if (descriptor.getterPresent() && !(current.getter() && JSValue::strictEqual(current.getter(), descriptor.getter()))) {
+        if (descriptor.getterPresent() && !(current.getter() && JSValue::strictEqual(exec, current.getter(), descriptor.getter()))) {
             if (throwException)
                 throwError(exec, TypeError, "Attempting to change the getter of an unconfigurable property.");
             return false;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.h
index 9eb4e3e..21dbfe9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.h
@@ -74,7 +74,7 @@ namespace JSC {
         friend class JSCell;
 
     public:
-        explicit JSObject(PassRefPtr<Structure>);
+        explicit JSObject(NonNullPassRefPtr<Structure>);
 
         virtual void markChildren(MarkStack&);
         ALWAYS_INLINE void markChildrenDirect(MarkStack& markStack);
@@ -86,7 +86,7 @@ namespace JSC {
         JSValue prototype() const;
         void setPrototype(JSValue prototype);
         
-        void setStructure(PassRefPtr<Structure>);
+        void setStructure(NonNullPassRefPtr<Structure>);
         Structure* inheritorID();
 
         virtual UString className() const;
@@ -115,15 +115,15 @@ namespace JSC {
         bool hasProperty(ExecState*, unsigned propertyName) const;
         bool hasOwnProperty(ExecState*, const Identifier& propertyName) const;
 
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
-        virtual bool deleteProperty(ExecState*, unsigned propertyName, bool checkDontDelete = true);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+        virtual bool deleteProperty(ExecState*, unsigned propertyName);
 
         virtual JSValue defaultValue(ExecState*, PreferredPrimitiveType) const;
 
         virtual bool hasInstance(ExecState*, JSValue, JSValue prototypeProperty);
 
-        virtual void getPropertyNames(ExecState*, PropertyNameArray&);
-        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, bool includeNonEnumerable = false);
+        virtual void getPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
 
         virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType = NoPreference) const;
         virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue& value);
@@ -135,7 +135,6 @@ namespace JSC {
         virtual JSObject* toThisObject(ExecState*) const;
         virtual JSObject* unwrappedObject();
 
-        virtual bool getPropertyAttributes(ExecState*, const Identifier& propertyName, unsigned& attributes) const;
         bool getPropertySpecificValue(ExecState* exec, const Identifier& propertyName, JSCell*& specificFunction) const;
 
         // This get function only looks at the property map.
@@ -197,7 +196,6 @@ namespace JSC {
         virtual bool isActivationObject() const { return false; }
         virtual bool isWatchdogException() const { return false; }
         virtual bool isNotAnObjectErrorStub() const { return false; }
-
 #ifdef QT_BUILD_SCRIPT_LIB
         virtual bool compareToObject(ExecState*, JSObject *other) { return other == this; }
 #endif
@@ -206,15 +204,22 @@ namespace JSC {
         void allocatePropertyStorageInline(size_t oldSize, size_t newSize);
         bool isUsingInlineStorage() const { return m_structure->isUsingInlineStorage(); }
 
-        static const size_t inlineStorageCapacity = sizeof(EncodedJSValue) == 2 * sizeof(void*) ? 4 : 3;
-        static const size_t nonInlineBaseStorageCapacity = 16;
+        static const unsigned inlineStorageCapacity = sizeof(EncodedJSValue) == 2 * sizeof(void*) ? 4 : 3;
+        static const unsigned nonInlineBaseStorageCapacity = 16;
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultMark | HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
+        }
+
+        void flattenDictionaryObject()
+        {
+            m_structure->flattenDictionaryStructure(this);
         }
 
     protected:
+        static const unsigned StructureFlags = 0;
+
         void addAnonymousSlots(unsigned count);
         void putAnonymousValue(unsigned index, JSValue value)
         {
@@ -231,7 +236,7 @@ namespace JSC {
         using JSCell::isGetterSetter;
         using JSCell::toObject;
         void getObject();
-        void getString();
+        void getString(ExecState* exec);
         void isObject();
         void isString();
 #if USE(JSVALUE32)
@@ -268,8 +273,6 @@ namespace JSC {
         RefPtr<Structure> m_inheritorID;
     };
     
-JSObject* constructEmptyObject(ExecState*);
-
 inline JSObject* asObject(JSCell* cell)
 {
     ASSERT(cell->isObject());
@@ -281,10 +284,9 @@ inline JSObject* asObject(JSValue value)
     return asObject(value.asCell());
 }
 
-inline JSObject::JSObject(PassRefPtr<Structure> structure)
+inline JSObject::JSObject(NonNullPassRefPtr<Structure> structure)
     : JSCell(structure.releaseRef()) // ~JSObject balances this ref()
 {
-    ASSERT(m_structure);
     ASSERT(m_structure->propertyStorageCapacity() == inlineStorageCapacity);
     ASSERT(m_structure->isEmpty());
     ASSERT(prototype().isNull() || Heap::heap(this) == Heap::heap(prototype()));
@@ -313,7 +315,7 @@ inline void JSObject::setPrototype(JSValue prototype)
     setStructure(newStructure.release());
 }
 
-inline void JSObject::setStructure(PassRefPtr<Structure> structure)
+inline void JSObject::setStructure(NonNullPassRefPtr<Structure> structure)
 {
     m_structure->deref();
     m_structure = structure.releaseRef(); // ~JSObject balances this ref()
@@ -375,14 +377,14 @@ ALWAYS_INLINE bool JSObject::getOwnPropertySlot(ExecState* exec, const Identifie
 
 ALWAYS_INLINE bool JSCell::fastGetOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
 {
-    if (structure()->typeInfo().hasStandardGetOwnPropertySlot())
+    if (!structure()->typeInfo().overridesGetOwnPropertySlot())
         return asObject(this)->inlineGetOwnPropertySlot(exec, propertyName, slot);
     return getOwnPropertySlot(exec, propertyName, slot);
 }
 
 // It may seem crazy to inline a function this large but it makes a big difference
 // since this is function very hot in variable lookup
-inline bool JSObject::getPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
+ALWAYS_INLINE bool JSObject::getPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
 {
     JSObject* object = this;
     while (true) {
@@ -395,7 +397,7 @@ inline bool JSObject::getPropertySlot(ExecState* exec, const Identifier& propert
     }
 }
 
-inline bool JSObject::getPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
+ALWAYS_INLINE bool JSObject::getPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
 {
     JSObject* object = this;
     while (true) {
@@ -689,7 +691,7 @@ ALWAYS_INLINE void JSObject::markChildrenDirect(MarkStack& markStack)
 {
     JSCell::markChildren(markStack);
 
-    m_structure->markAggregate(markStack);
+    markStack.append(prototype());
     
     PropertyStorage storage = propertyStorage();
     size_t storageSize = m_structure->propertyStorageSize();
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.cpp
index e08a3d9..d3dcb83 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.cpp
@@ -29,26 +29,62 @@
 #include "config.h"
 #include "JSPropertyNameIterator.h"
 
+#include "JSGlobalObject.h"
+
 namespace JSC {
 
 ASSERT_CLASS_FITS_IN_CELL(JSPropertyNameIterator);
 
-JSPropertyNameIterator::~JSPropertyNameIterator()
+JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, JSObject* o)
 {
+    ASSERT(!o->structure()->enumerationCache() ||
+            o->structure()->enumerationCache()->cachedStructure() != o->structure() ||
+            o->structure()->enumerationCache()->cachedPrototypeChain() != o->structure()->prototypeChain(exec));
+
+    PropertyNameArray propertyNames(exec);
+    o->getPropertyNames(exec, propertyNames);
+    size_t numCacheableSlots = 0;
+    if (!o->structure()->hasNonEnumerableProperties() && !o->structure()->hasAnonymousSlots() &&
+        !o->structure()->hasGetterSetterProperties() && !o->structure()->isUncacheableDictionary() &&
+        !o->structure()->typeInfo().overridesGetPropertyNames())
+        numCacheableSlots = o->structure()->propertyStorageSize();
+
+    JSPropertyNameIterator* jsPropertyNameIterator = new (exec) JSPropertyNameIterator(exec, propertyNames.data(), numCacheableSlots);
+
+    if (o->structure()->isDictionary())
+        return jsPropertyNameIterator;
+
+    if (o->structure()->typeInfo().overridesGetPropertyNames())
+        return jsPropertyNameIterator;
+    
+    size_t count = normalizePrototypeChain(exec, o);
+    StructureChain* structureChain = o->structure()->prototypeChain(exec);
+    RefPtr<Structure>* structure = structureChain->head();
+    for (size_t i = 0; i < count; ++i) {
+        if (structure[i]->typeInfo().overridesGetPropertyNames())
+            return jsPropertyNameIterator;
+    }
+
+    jsPropertyNameIterator->setCachedPrototypeChain(structureChain);
+    jsPropertyNameIterator->setCachedStructure(o->structure());
+    o->structure()->setEnumerationCache(jsPropertyNameIterator);
+    return jsPropertyNameIterator;
 }
 
-void JSPropertyNameIterator::markChildren(MarkStack& markStack)
+JSValue JSPropertyNameIterator::get(ExecState* exec, JSObject* base, size_t i)
 {
-    JSCell::markChildren(markStack);
-    if (m_object)
-        markStack.append(m_object);
+    JSValue& identifier = m_jsStrings[i];
+    if (m_cachedStructure == base->structure() && m_cachedPrototypeChain == base->structure()->prototypeChain(exec))
+        return identifier;
+
+    if (!base->hasProperty(exec, Identifier(exec, asString(identifier)->value(exec))))
+        return JSValue();
+    return identifier;
 }
 
-void JSPropertyNameIterator::invalidate()
+void JSPropertyNameIterator::markChildren(MarkStack& markStack)
 {
-    ASSERT(m_position == m_end);
-    m_object = 0;
-    m_data.clear();
+    markStack.appendValues(m_jsStrings.get(), m_jsStringsSize, MayContainNullValues);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h
index d2849a8..f5c64bb 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h
@@ -31,7 +31,9 @@
 
 #include "JSObject.h"
 #include "JSString.h"
+#include "Operations.h"
 #include "PropertyNameArray.h"
+#include "StructureChain.h"
 
 namespace JSC {
 
@@ -39,73 +41,63 @@ namespace JSC {
     class JSObject;
 
     class JSPropertyNameIterator : public JSCell {
+        friend class JIT;
+
     public:
-        static JSPropertyNameIterator* create(ExecState*, JSValue);
+        static JSPropertyNameIterator* create(ExecState*, JSObject*);
+        
+        static PassRefPtr<Structure> createStructure(JSValue prototype)
+        {
+            return Structure::create(prototype, TypeInfo(CompoundType, OverridesMarkChildren));
+        }
 
-        virtual ~JSPropertyNameIterator();
+        virtual bool isPropertyNameIterator() const { return true; }
 
         virtual void markChildren(MarkStack&);
 
-        JSValue next(ExecState*);
-        void invalidate();
-        
-        static PassRefPtr<Structure> createStructure(JSValue prototype)
+        bool getOffset(size_t i, int& offset)
         {
-            return Structure::create(prototype, TypeInfo(CompoundType));
+            if (i >= m_numCacheableSlots)
+                return false;
+            offset = i;
+            return true;
         }
+
+        JSValue get(ExecState*, JSObject*, size_t i);
+        size_t size() { return m_jsStringsSize; }
+
+        void setCachedStructure(Structure* structure) { m_cachedStructure = structure; }
+        Structure* cachedStructure() { return m_cachedStructure; }
+
+        void setCachedPrototypeChain(NonNullPassRefPtr<StructureChain> cachedPrototypeChain) { m_cachedPrototypeChain = cachedPrototypeChain; }
+        StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); }
+
     private:
-        JSPropertyNameIterator(ExecState*);
-        JSPropertyNameIterator(ExecState*, JSObject*, PassRefPtr<PropertyNameArrayData> propertyNameArrayData);
+        JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot);
 
-        JSObject* m_object;
-        RefPtr<PropertyNameArrayData> m_data;
-        PropertyNameArrayData::const_iterator m_position;
-        PropertyNameArrayData::const_iterator m_end;
+        Structure* m_cachedStructure;
+        RefPtr<StructureChain> m_cachedPrototypeChain;
+        uint32_t m_numCacheableSlots;
+        uint32_t m_jsStringsSize;
+        OwnArrayPtr<JSValue> m_jsStrings;
     };
 
-inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec)
+inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlots)
     : JSCell(exec->globalData().propertyNameIteratorStructure.get())
-    , m_object(0)
-    , m_position(0)
-    , m_end(0)
+    , m_cachedStructure(0)
+    , m_numCacheableSlots(numCacheableSlots)
+    , m_jsStringsSize(propertyNameArrayData->propertyNameVector().size())
+    , m_jsStrings(new JSValue[m_jsStringsSize])
 {
+    PropertyNameArrayData::PropertyNameVector& propertyNameVector = propertyNameArrayData->propertyNameVector();
+    for (size_t i = 0; i < m_jsStringsSize; ++i)
+        m_jsStrings[i] = jsOwnedString(exec, propertyNameVector[i].ustring());
 }
 
-inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec, JSObject* object, PassRefPtr<PropertyNameArrayData> propertyNameArrayData)
-    : JSCell(exec->globalData().propertyNameIteratorStructure.get())
-    , m_object(object)
-    , m_data(propertyNameArrayData)
-    , m_position(m_data->begin())
-    , m_end(m_data->end())
-{
-}
-
-inline JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, JSValue v)
+inline void Structure::setEnumerationCache(JSPropertyNameIterator* enumerationCache)
 {
-    if (v.isUndefinedOrNull())
-        return new (exec) JSPropertyNameIterator(exec);
-
-    JSObject* o = v.toObject(exec);
-    PropertyNameArray propertyNames(exec);
-    o->getPropertyNames(exec, propertyNames);
-    return new (exec) JSPropertyNameIterator(exec, o, propertyNames.releaseData());
-}
-
-inline JSValue JSPropertyNameIterator::next(ExecState* exec)
-{
-    if (m_position == m_end)
-        return JSValue();
-
-    if (m_data->cachedStructure() == m_object->structure() && m_data->cachedPrototypeChain() == m_object->structure()->prototypeChain(exec))
-        return jsOwnedString(exec, (*m_position++).ustring());
-
-    do {
-        if (m_object->hasProperty(exec, *m_position))
-            return jsOwnedString(exec, (*m_position++).ustring());
-        m_position++;
-    } while (m_position != m_end);
-
-    return JSValue();
+    ASSERT(!isDictionary());
+    m_enumerationCache = enumerationCache;
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSStaticScopeObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSStaticScopeObject.h
index 5eb0e4b..2542878 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSStaticScopeObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSStaticScopeObject.h
@@ -57,7 +57,10 @@ namespace JSC{
         virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
         void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
 
-        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, NeedsThisConversion)); }
+        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); }
+
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
 
     private:
         JSStaticScopeObjectData* d() { return static_cast<JSStaticScopeObjectData*>(JSVariableObject::d); }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.cpp
index a30f729..1e23a15 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.cpp
@@ -25,41 +25,150 @@
 
 #include "JSGlobalObject.h"
 #include "JSObject.h"
+#include "Operations.h"
 #include "StringObject.h"
 #include "StringPrototype.h"
 
 namespace JSC {
 
+void JSString::Rope::destructNonRecursive()
+{
+    Vector<Rope*, 32> workQueue;
+    Rope* rope = this;
+
+    while (true) {
+        unsigned length = rope->ropeLength();
+        for (unsigned i = 0; i < length; ++i) {
+            Fiber& fiber = rope->fibers(i);
+            if (fiber.isString())
+                fiber.string()->deref();
+            else {
+                Rope* nextRope = fiber.rope();
+                if (nextRope->hasOneRef())
+                    workQueue.append(nextRope);
+                else
+                    nextRope->deref();
+            }
+        }
+        if (rope != this)
+            fastFree(rope);
+
+        if (workQueue.isEmpty())
+            return;
+
+        rope = workQueue.last();
+        workQueue.removeLast();
+    }
+}
+
+JSString::Rope::~Rope()
+{
+    destructNonRecursive();
+}
+
+// Overview: this methods converts a JSString from holding a string in rope form
+// down to a simple UString representation.  It does so by building up the string
+// backwards, since we want to avoid recursion, we expect that the tree structure
+// representing the rope is likely imbalanced with more nodes down the left side
+// (since appending to the string is likely more common) - and as such resolving
+// in this fashion should minimize work queue size.  (If we built the queue forwards
+// we would likely have to place all of the constituent UString::Reps into the
+// Vector before performing any concatenation, but by working backwards we likely
+// only fill the queue with the number of substrings at any given level in a
+// rope-of-ropes.)
+void JSString::resolveRope(ExecState* exec) const
+{
+    ASSERT(isRope());
+
+    // Allocate the buffer to hold the final string, position initially points to the end.
+    UChar* buffer;
+    if (PassRefPtr<UStringImpl> newImpl = UStringImpl::tryCreateUninitialized(m_stringLength, buffer))
+        m_value = newImpl;
+    else {
+        for (unsigned i = 0; i < m_ropeLength; ++i) {
+            m_fibers[i].deref();
+            m_fibers[i] = static_cast<void*>(0);
+        }
+        m_ropeLength = 0;
+        ASSERT(!isRope());
+        ASSERT(m_value == UString());
+        throwOutOfMemoryError(exec);
+        return;
+    }
+    UChar* position = buffer + m_stringLength;
+
+    // Start with the current Rope.
+    Vector<Rope::Fiber, 32> workQueue;
+    Rope::Fiber currentFiber;
+    for (unsigned i = 0; i < (m_ropeLength - 1); ++i)
+        workQueue.append(m_fibers[i]);
+    currentFiber = m_fibers[m_ropeLength - 1];
+    while (true) {
+        if (currentFiber.isRope()) {
+            Rope* rope = currentFiber.rope();
+            // Copy the contents of the current rope into the workQueue, with the last item in 'currentFiber'
+            // (we will be working backwards over the rope).
+            unsigned ropeLengthMinusOne = rope->ropeLength() - 1;
+            for (unsigned i = 0; i < ropeLengthMinusOne; ++i)
+                workQueue.append(rope->fibers(i));
+            currentFiber = rope->fibers(ropeLengthMinusOne);
+        } else {
+            UString::Rep* string = currentFiber.string();
+            unsigned length = string->size();
+            position -= length;
+            UStringImpl::copyChars(position, string->data(), length);
+
+            // Was this the last item in the work queue?
+            if (workQueue.isEmpty()) {
+                // Create a string from the UChar buffer, clear the rope RefPtr.
+                ASSERT(buffer == position);
+                for (unsigned i = 0; i < m_ropeLength; ++i) {
+                    m_fibers[i].deref();
+                    m_fibers[i] = static_cast<void*>(0);
+                }
+                m_ropeLength = 0;
+
+                ASSERT(!isRope());
+                return;
+            }
+
+            // No! - set the next item up to process.
+            currentFiber = workQueue.last();
+            workQueue.removeLast();
+        }
+    }
+}
+
 JSValue JSString::toPrimitive(ExecState*, PreferredPrimitiveType) const
 {
     return const_cast<JSString*>(this);
 }
 
-bool JSString::getPrimitiveNumber(ExecState*, double& number, JSValue& value)
+bool JSString::getPrimitiveNumber(ExecState* exec, double& number, JSValue& result)
 {
-    value = this;
-    number = m_value.toDouble();
+    result = this;
+    number = value(exec).toDouble();
     return false;
 }
 
 bool JSString::toBoolean(ExecState*) const
 {
-    return !m_value.isEmpty();
+    return m_stringLength;
 }
 
-double JSString::toNumber(ExecState*) const
+double JSString::toNumber(ExecState* exec) const
 {
-    return m_value.toDouble();
+    return value(exec).toDouble();
 }
 
-UString JSString::toString(ExecState*) const
+UString JSString::toString(ExecState* exec) const
 {
-    return m_value;
+    return value(exec);
 }
 
-UString JSString::toThisString(ExecState*) const
+UString JSString::toThisString(ExecState* exec) const
 {
-    return m_value;
+    return value(exec);
 }
 
 JSString* JSString::toThisJSString(ExecState*)
@@ -106,14 +215,14 @@ bool JSString::getOwnPropertySlot(ExecState* exec, const Identifier& propertyNam
 bool JSString::getStringPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
 {
     if (propertyName == exec->propertyNames().length) {
-        descriptor.setDescriptor(jsNumber(exec, m_value.size()), DontEnum | DontDelete | ReadOnly);
+        descriptor.setDescriptor(jsNumber(exec, m_stringLength), DontEnum | DontDelete | ReadOnly);
         return true;
     }
     
     bool isStrictUInt32;
     unsigned i = propertyName.toStrictUInt32(&isStrictUInt32);
-    if (isStrictUInt32 && i < static_cast<unsigned>(m_value.size())) {
-        descriptor.setDescriptor(jsSingleCharacterSubstring(exec, m_value, i), DontDelete | ReadOnly);
+    if (isStrictUInt32 && i < m_stringLength) {
+        descriptor.setDescriptor(jsSingleCharacterSubstring(exec, value(exec), i), DontDelete | ReadOnly);
         return true;
     }
     
@@ -139,60 +248,4 @@ bool JSString::getOwnPropertySlot(ExecState* exec, unsigned propertyName, Proper
     return JSString::getOwnPropertySlot(exec, Identifier::from(exec, propertyName), slot);
 }
 
-bool JSString::getStringPropertyAttributes(ExecState* exec, const Identifier& propertyName, unsigned& attributes) const
-{
-    if (propertyName == exec->propertyNames().length) {
-        attributes = DontEnum | DontDelete | ReadOnly;
-        return true;
-    }
-    bool isStrictUInt32;
-    unsigned i = propertyName.toStrictUInt32(&isStrictUInt32);
-    if (isStrictUInt32 && i < static_cast<unsigned>(m_value.size())) {
-        attributes = DontDelete | ReadOnly;
-        return true;
-    }
-    return false;
-}
-
-JSString* jsString(JSGlobalData* globalData, const UString& s)
-{
-    int size = s.size();
-    if (!size)
-        return globalData->smallStrings.emptyString(globalData);
-    if (size == 1) {
-        UChar c = s.data()[0];
-        if (c <= 0xFF)
-            return globalData->smallStrings.singleCharacterString(globalData, c);
-    }
-    return new (globalData) JSString(globalData, s);
-}
-    
-JSString* jsSubstring(JSGlobalData* globalData, const UString& s, unsigned offset, unsigned length)
-{
-    ASSERT(offset <= static_cast<unsigned>(s.size()));
-    ASSERT(length <= static_cast<unsigned>(s.size()));
-    ASSERT(offset + length <= static_cast<unsigned>(s.size()));
-    if (!length)
-        return globalData->smallStrings.emptyString(globalData);
-    if (length == 1) {
-        UChar c = s.data()[offset];
-        if (c <= 0xFF)
-            return globalData->smallStrings.singleCharacterString(globalData, c);
-    }
-    return new (globalData) JSString(globalData, UString::Rep::create(s.rep(), offset, length));
-}
-
-JSString* jsOwnedString(JSGlobalData* globalData, const UString& s)
-{
-    int size = s.size();
-    if (!size)
-        return globalData->smallStrings.emptyString(globalData);
-    if (size == 1) {
-        UChar c = s.data()[0];
-        if (c <= 0xFF)
-            return globalData->smallStrings.singleCharacterString(globalData, c);
-    }
-    return new (globalData) JSString(globalData, s, JSString::HasOtherOwner);
-}
-
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.h
index eeada2e..e1c6aba 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSString.h
@@ -59,14 +59,117 @@ namespace JSC {
     JSString* jsOwnedString(JSGlobalData*, const UString&); 
     JSString* jsOwnedString(ExecState*, const UString&); 
 
-    class JSString : public JSCell {
-        friend class JIT;
-        friend struct VPtrSet;
+    typedef void (*JSStringFinalizerCallback)(JSString*, void* context);
+    JSString* jsStringWithFinalizer(ExecState*, const UString&, JSStringFinalizerCallback callback, void* context);
 
+    class JS_EXPORTCLASS JSString : public JSCell {
     public:
-        JSString(JSGlobalData* globalData, const UString& value)
+        friend class JIT;
+        friend class JSGlobalData;
+
+        // A Rope is a string composed of a set of substrings.
+        class Rope : public RefCounted<Rope> {
+        public:
+            // A Rope is composed from a set of smaller strings called Fibers.
+            // Each Fiber in a rope is either UString::Rep or another Rope.
+            class Fiber {
+            public:
+                Fiber() : m_value(0) {}
+                Fiber(UString::Rep* string) : m_value(reinterpret_cast<intptr_t>(string)) {}
+                Fiber(Rope* rope) : m_value(reinterpret_cast<intptr_t>(rope) | 1) {}
+
+                Fiber(void* nonFiber) : m_value(reinterpret_cast<intptr_t>(nonFiber)) {}
+
+                void deref()
+                {
+                    if (isRope())
+                        rope()->deref();
+                    else
+                        string()->deref();
+                }
+
+                Fiber& ref()
+                {
+                    if (isString())
+                        string()->ref();
+                    else
+                        rope()->ref();
+                    return *this;
+                }
+
+                unsigned refAndGetLength()
+                {
+                    if (isString()) {
+                        UString::Rep* rep = string();
+                        return rep->ref()->size();
+                    } else {
+                        Rope* r = rope();
+                        r->ref();
+                        return r->stringLength();
+                    }
+                }
+
+                bool isRope() { return m_value & 1; }
+                Rope* rope() { return reinterpret_cast<Rope*>(m_value & ~1); }
+                bool isString() { return !isRope(); }
+                UString::Rep* string() { return reinterpret_cast<UString::Rep*>(m_value); }
+
+                void* nonFiber() { return reinterpret_cast<void*>(m_value); }
+            private:
+                intptr_t m_value;
+            };
+
+            // Creates a Rope comprising of 'ropeLength' Fibers.
+            // The Rope is constructed in an uninitialized state - initialize must be called for each Fiber in the Rope.
+            static PassRefPtr<Rope> createOrNull(unsigned ropeLength)
+            {
+                void* allocation;
+                if (tryFastMalloc(sizeof(Rope) + (ropeLength - 1) * sizeof(Fiber)).getValue(allocation))
+                    return adoptRef(new (allocation) Rope(ropeLength));
+                return 0;
+            }
+
+            ~Rope();
+            void destructNonRecursive();
+
+            void append(unsigned &index, Fiber& fiber)
+            {
+                m_fibers[index++] = fiber;
+                m_stringLength += fiber.refAndGetLength();
+            }
+            void append(unsigned &index, const UString& string)
+            {
+                UString::Rep* rep = string.rep();
+                m_fibers[index++] = Fiber(rep);
+                m_stringLength += rep->ref()->size();
+            }
+            void append(unsigned& index, JSString* jsString)
+            {
+                if (jsString->isRope()) {
+                    for (unsigned i = 0; i < jsString->m_ropeLength; ++i)
+                        append(index, jsString->m_fibers[i]);
+                } else
+                    append(index, jsString->string());
+            }
+
+            unsigned ropeLength() { return m_ropeLength; }
+            unsigned stringLength() { return m_stringLength; }
+            Fiber& fibers(unsigned index) { return m_fibers[index]; }
+
+        private:
+            Rope(unsigned ropeLength) : m_ropeLength(ropeLength), m_stringLength(0) {}
+            void* operator new(size_t, void* inPlace) { return inPlace; }
+            
+            unsigned m_ropeLength;
+            unsigned m_stringLength;
+            Fiber m_fibers[1];
+        };
+
+        ALWAYS_INLINE JSString(JSGlobalData* globalData, const UString& value)
             : JSCell(globalData->stringStructure.get())
+            , m_stringLength(value.size())
             , m_value(value)
+            , m_ropeLength(0)
         {
             Heap::heap(this)->reportExtraMemoryCost(value.cost());
         }
@@ -74,33 +177,164 @@ namespace JSC {
         enum HasOtherOwnerType { HasOtherOwner };
         JSString(JSGlobalData* globalData, const UString& value, HasOtherOwnerType)
             : JSCell(globalData->stringStructure.get())
+            , m_stringLength(value.size())
             , m_value(value)
+            , m_ropeLength(0)
         {
         }
         JSString(JSGlobalData* globalData, PassRefPtr<UString::Rep> value, HasOtherOwnerType)
             : JSCell(globalData->stringStructure.get())
+            , m_stringLength(value->size())
             , m_value(value)
+            , m_ropeLength(0)
         {
         }
-        
-        const UString& value() const { return m_value; }
+        JSString(JSGlobalData* globalData, PassRefPtr<JSString::Rope> rope)
+            : JSCell(globalData->stringStructure.get())
+            , m_stringLength(rope->stringLength())
+            , m_ropeLength(1)
+        {
+            m_fibers[0] = rope.releaseRef();
+        }
+        // This constructor constructs a new string by concatenating s1 & s2.
+        // This should only be called with ropeLength <= 3.
+        JSString(JSGlobalData* globalData, unsigned ropeLength, JSString* s1, JSString* s2)
+            : JSCell(globalData->stringStructure.get())
+            , m_stringLength(s1->length() + s2->length())
+            , m_ropeLength(ropeLength)
+        {
+            ASSERT(ropeLength <= s_maxInternalRopeLength);
+            unsigned index = 0;
+            appendStringInConstruct(index, s1);
+            appendStringInConstruct(index, s2);
+            ASSERT(ropeLength == index);
+        }
+        // This constructor constructs a new string by concatenating s1 & s2.
+        // This should only be called with ropeLength <= 3.
+        JSString(JSGlobalData* globalData, unsigned ropeLength, JSString* s1, const UString& u2)
+            : JSCell(globalData->stringStructure.get())
+            , m_stringLength(s1->length() + u2.size())
+            , m_ropeLength(ropeLength)
+        {
+            ASSERT(ropeLength <= s_maxInternalRopeLength);
+            unsigned index = 0;
+            appendStringInConstruct(index, s1);
+            appendStringInConstruct(index, u2);
+            ASSERT(ropeLength == index);
+        }
+        // This constructor constructs a new string by concatenating s1 & s2.
+        // This should only be called with ropeLength <= 3.
+        JSString(JSGlobalData* globalData, unsigned ropeLength, const UString& u1, JSString* s2)
+            : JSCell(globalData->stringStructure.get())
+            , m_stringLength(u1.size() + s2->length())
+            , m_ropeLength(ropeLength)
+        {
+            ASSERT(ropeLength <= s_maxInternalRopeLength);
+            unsigned index = 0;
+            appendStringInConstruct(index, u1);
+            appendStringInConstruct(index, s2);
+            ASSERT(ropeLength == index);
+        }
+        // This constructor constructs a new string by concatenating v1, v2 & v3.
+        // This should only be called with ropeLength <= 3 ... which since every
+        // value must require a ropeLength of at least one implies that the length
+        // for each value must be exactly 1!
+        JSString(ExecState* exec, JSValue v1, JSValue v2, JSValue v3)
+            : JSCell(exec->globalData().stringStructure.get())
+            , m_stringLength(0)
+            , m_ropeLength(s_maxInternalRopeLength)
+        {
+            unsigned index = 0;
+            appendValueInConstructAndIncrementLength(exec, index, v1);
+            appendValueInConstructAndIncrementLength(exec, index, v2);
+            appendValueInConstructAndIncrementLength(exec, index, v3);
+            ASSERT(index == s_maxInternalRopeLength);
+        }
+
+        JSString(JSGlobalData* globalData, const UString& value, JSStringFinalizerCallback finalizer, void* context)
+            : JSCell(globalData->stringStructure.get())
+            , m_stringLength(value.size())
+            , m_value(value)
+            , m_ropeLength(0)
+        {
+            // nasty hack because we can't union non-POD types
+            m_fibers[0] = reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(finalizer));
+            m_fibers[1] = context;
+            Heap::heap(this)->reportExtraMemoryCost(value.cost());
+        }
+
+        ~JSString()
+        {
+            ASSERT(vptr() == JSGlobalData::jsStringVPtr);
+            for (unsigned i = 0; i < m_ropeLength; ++i)
+                m_fibers[i].deref();
+
+            if (!m_ropeLength && m_fibers[0].nonFiber()) {
+                JSStringFinalizerCallback finalizer = (JSStringFinalizerCallback)(m_fibers[0].nonFiber());
+                finalizer(this, m_fibers[1].nonFiber());
+            }
+        }
+
+        const UString& value(ExecState* exec) const
+        {
+            if (isRope())
+                resolveRope(exec);
+            return m_value;
+        }
+        const UString tryGetValue() const
+        {
+            if (isRope())
+                UString();
+            return m_value;
+        }
+        unsigned length() { return m_stringLength; }
 
         bool getStringPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
         bool getStringPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
         bool getStringPropertyDescriptor(ExecState*, const Identifier& propertyName, PropertyDescriptor&);
 
-        bool getStringPropertyAttributes(ExecState*, const Identifier& propertyName, unsigned&) const;
-
-        bool canGetIndex(unsigned i) { return i < static_cast<unsigned>(m_value.size()); }
-        JSString* getIndex(JSGlobalData*, unsigned);
+        bool canGetIndex(unsigned i) { return i < m_stringLength; }
+        JSString* getIndex(ExecState*, unsigned);
 
-        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(StringType, NeedsThisConversion | HasDefaultMark)); }
+        static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(StringType, OverridesGetOwnPropertySlot | NeedsThisConversion)); }
 
     private:
         enum VPtrStealingHackType { VPtrStealingHack };
         JSString(VPtrStealingHackType) 
             : JSCell(0)
+            , m_ropeLength(0)
+        {
+        }
+
+        void resolveRope(ExecState*) const;
+
+        void appendStringInConstruct(unsigned& index, const UString& string)
+        {
+            m_fibers[index++] = Rope::Fiber(string.rep()->ref());
+        }
+
+        void appendStringInConstruct(unsigned& index, JSString* jsString)
         {
+            if (jsString->isRope()) {
+                for (unsigned i = 0; i < jsString->m_ropeLength; ++i)
+                    m_fibers[index++] = jsString->m_fibers[i].ref();
+            } else
+                appendStringInConstruct(index, jsString->string());
+        }
+
+        void appendValueInConstructAndIncrementLength(ExecState* exec, unsigned& index, JSValue v)
+        {
+            if (v.isString()) {
+                ASSERT(asCell(v)->isString());
+                JSString* s = static_cast<JSString*>(asCell(v));
+                ASSERT(s->ropeLength() == 1);
+                appendStringInConstruct(index, s);
+                m_stringLength += s->length();
+            } else {
+                UString u(v.toString(exec));
+                m_fibers[index++] = Rope::Fiber(u.rep()->ref());
+                m_stringLength += u.size();
+            }
         }
 
         virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const;
@@ -119,11 +353,38 @@ namespace JSC {
         virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
 
-        UString m_value;
+        static const unsigned s_maxInternalRopeLength = 3;
+
+        // A string is represented either by a UString or a Rope.
+        unsigned m_stringLength;
+        mutable UString m_value;
+        mutable unsigned m_ropeLength;
+        mutable Rope::Fiber m_fibers[s_maxInternalRopeLength];
+
+        bool isRope() const { return m_ropeLength; }
+        UString& string() { ASSERT(!isRope()); return m_value; }
+        unsigned ropeLength() { return m_ropeLength ? m_ropeLength : 1; }
+
+        friend JSValue jsString(ExecState* exec, JSString* s1, JSString* s2);
+        friend JSValue jsString(ExecState* exec, const UString& u1, JSString* s2);
+        friend JSValue jsString(ExecState* exec, JSString* s1, const UString& u2);
+        friend JSValue jsString(ExecState* exec, Register* strings, unsigned count);
+        friend JSValue jsString(ExecState* exec, JSValue thisValue, const ArgList& args);
+        friend JSString* jsStringWithFinalizer(ExecState*, const UString&, JSStringFinalizerCallback callback, void* context);
     };
 
     JSString* asString(JSValue);
 
+    // When an object is created from a different DLL, MSVC changes vptr to a "local" one right after invoking a constructor,
+    // see <http://groups.google.com/group/microsoft.public.vc.language/msg/55cdcefeaf770212>.
+    // This breaks isJSString(), and we don't need that hack anyway, so we change vptr back to primary one.
+    // The below function must be called by any inline function that invokes a JSString constructor.
+#if COMPILER(MSVC) && !defined(BUILDING_JavaScriptCore)
+    inline JSString* fixupVPtr(JSGlobalData* globalData, JSString* string) { string->setVPtr(globalData->jsStringVPtr); return string; }
+#else
+    inline JSString* fixupVPtr(JSGlobalData*, JSString* string) { return string; }
+#endif
+
     inline JSString* asString(JSValue value)
     {
         ASSERT(asCell(value)->isString());
@@ -139,7 +400,7 @@ namespace JSC {
     {
         if (c <= 0xFF)
             return globalData->smallStrings.singleCharacterString(globalData, c);
-        return new (globalData) JSString(globalData, UString(&c, 1));
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, UString(&c, 1)));
     }
 
     inline JSString* jsSingleCharacterSubstring(JSGlobalData* globalData, const UString& s, unsigned offset)
@@ -148,7 +409,7 @@ namespace JSC {
         UChar c = s.data()[offset];
         if (c <= 0xFF)
             return globalData->smallStrings.singleCharacterString(globalData, c);
-        return new (globalData) JSString(globalData, UString::Rep::create(s.rep(), offset, 1));
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, UString(UString::Rep::create(s.rep(), offset, 1))));
     }
 
     inline JSString* jsNontrivialString(JSGlobalData* globalData, const char* s)
@@ -156,19 +417,67 @@ namespace JSC {
         ASSERT(s);
         ASSERT(s[0]);
         ASSERT(s[1]);
-        return new (globalData) JSString(globalData, s);
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, s));
     }
 
     inline JSString* jsNontrivialString(JSGlobalData* globalData, const UString& s)
     {
         ASSERT(s.size() > 1);
-        return new (globalData) JSString(globalData, s);
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, s));
     }
 
-    inline JSString* JSString::getIndex(JSGlobalData* globalData, unsigned i)
+    inline JSString* JSString::getIndex(ExecState* exec, unsigned i)
     {
         ASSERT(canGetIndex(i));
-        return jsSingleCharacterSubstring(globalData, m_value, i);
+        return jsSingleCharacterSubstring(&exec->globalData(), value(exec), i);
+    }
+
+    inline JSString* jsString(JSGlobalData* globalData, const UString& s)
+    {
+        int size = s.size();
+        if (!size)
+            return globalData->smallStrings.emptyString(globalData);
+        if (size == 1) {
+            UChar c = s.data()[0];
+            if (c <= 0xFF)
+                return globalData->smallStrings.singleCharacterString(globalData, c);
+        }
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, s));
+    }
+
+    inline JSString* jsStringWithFinalizer(ExecState* exec, const UString& s, JSStringFinalizerCallback callback, void* context)
+    {
+        ASSERT(s.size() && (s.size() > 1 || s.data()[0] > 0xFF));
+        JSGlobalData* globalData = &exec->globalData();
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, s, callback, context));
+    }
+
+    inline JSString* jsSubstring(JSGlobalData* globalData, const UString& s, unsigned offset, unsigned length)
+    {
+        ASSERT(offset <= static_cast<unsigned>(s.size()));
+        ASSERT(length <= static_cast<unsigned>(s.size()));
+        ASSERT(offset + length <= static_cast<unsigned>(s.size()));
+        if (!length)
+            return globalData->smallStrings.emptyString(globalData);
+        if (length == 1) {
+            UChar c = s.data()[offset];
+            if (c <= 0xFF)
+                return globalData->smallStrings.singleCharacterString(globalData, c);
+        }
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, UString(UString::Rep::create(s.rep(), offset, length)), JSString::HasOtherOwner));
+    }
+
+    inline JSString* jsOwnedString(JSGlobalData* globalData, const UString& s)
+    {
+        int size = s.size();
+        if (!size)
+            return globalData->smallStrings.emptyString(globalData);
+        if (size == 1) {
+            UChar c = s.data()[0];
+            if (c <= 0xFF)
+                return globalData->smallStrings.singleCharacterString(globalData, c);
+        }
+        return fixupVPtr(globalData, new (globalData) JSString(globalData, s, JSString::HasOtherOwner));
     }
 
     inline JSString* jsEmptyString(ExecState* exec) { return jsEmptyString(&exec->globalData()); }
@@ -183,14 +492,14 @@ namespace JSC {
     ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
     {
         if (propertyName == exec->propertyNames().length) {
-            slot.setValue(jsNumber(exec, m_value.size()));
+            slot.setValue(jsNumber(exec, m_stringLength));
             return true;
         }
 
         bool isStrictUInt32;
         unsigned i = propertyName.toStrictUInt32(&isStrictUInt32);
-        if (isStrictUInt32 && i < static_cast<unsigned>(m_value.size())) {
-            slot.setValue(jsSingleCharacterSubstring(exec, m_value, i));
+        if (isStrictUInt32 && i < m_stringLength) {
+            slot.setValue(jsSingleCharacterSubstring(exec, value(exec), i));
             return true;
         }
 
@@ -199,8 +508,8 @@ namespace JSC {
         
     ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
     {
-        if (propertyName < static_cast<unsigned>(m_value.size())) {
-            slot.setValue(jsSingleCharacterSubstring(exec, m_value, propertyName));
+        if (propertyName < m_stringLength) {
+            slot.setValue(jsSingleCharacterSubstring(exec, value(exec), propertyName));
             return true;
         }
 
@@ -219,7 +528,7 @@ namespace JSC {
     inline UString JSValue::toString(ExecState* exec) const
     {
         if (isString())
-            return static_cast<JSString*>(asCell())->value();
+            return static_cast<JSString*>(asCell())->value(exec);
         if (isInt32())
             return exec->globalData().numericStrings.add(asInt32());
         if (isDouble())
@@ -236,6 +545,26 @@ namespace JSC {
         return asCell()->toString(exec);
     }
 
+    inline UString JSValue::toPrimitiveString(ExecState* exec) const
+    {
+        if (isString())
+            return static_cast<JSString*>(asCell())->value(exec);
+        if (isInt32())
+            return exec->globalData().numericStrings.add(asInt32());
+        if (isDouble())
+            return exec->globalData().numericStrings.add(asDouble());
+        if (isTrue())
+            return "true";
+        if (isFalse())
+            return "false";
+        if (isNull())
+            return "null";
+        if (isUndefined())
+            return "undefined";
+        ASSERT(isCell());
+        return asCell()->toPrimitive(exec, NoPreference).toString(exec);
+    }
+
 } // namespace JSC
 
 #endif // JSString_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSTypeInfo.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSTypeInfo.h
index 279510b..7c89600 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSTypeInfo.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSTypeInfo.h
@@ -40,9 +40,9 @@ namespace JSC {
     static const unsigned OverridesHasInstance = 1 << 2;
     static const unsigned ImplementsDefaultHasInstance = 1 << 3;
     static const unsigned NeedsThisConversion = 1 << 4;
-    static const unsigned HasStandardGetOwnPropertySlot = 1 << 5;
-    static const unsigned HasDefaultMark = 1 << 6;
-    static const unsigned HasDefaultGetPropertyNames = 1 << 7;
+    static const unsigned OverridesGetOwnPropertySlot = 1 << 5;
+    static const unsigned OverridesMarkChildren = 1 << 6;
+    static const unsigned OverridesGetPropertyNames = 1 << 7;
 
     class TypeInfo {
         friend class JIT;
@@ -63,9 +63,9 @@ namespace JSC {
         bool implementsHasInstance() const { return m_flags & ImplementsHasInstance; }
         bool overridesHasInstance() const { return m_flags & OverridesHasInstance; }
         bool needsThisConversion() const { return m_flags & NeedsThisConversion; }
-        bool hasStandardGetOwnPropertySlot() const { return m_flags & HasStandardGetOwnPropertySlot; }
-        bool hasDefaultMark() const { return m_flags & HasDefaultMark; }
-        bool hasDefaultGetPropertyNames() const { return m_flags & HasDefaultGetPropertyNames; }
+        bool overridesGetOwnPropertySlot() const { return m_flags & OverridesGetOwnPropertySlot; }
+        bool overridesMarkChildren() const { return m_flags & OverridesMarkChildren; }
+        bool overridesGetPropertyNames() const { return m_flags & OverridesGetPropertyNames; }
         unsigned flags() const { return m_flags; }
 
     private:
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSValue.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSValue.h
index 3c511d8..6da921f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSValue.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSValue.h
@@ -80,6 +80,7 @@ namespace JSC {
         enum JSUndefinedTag { JSUndefined };
         enum JSTrueTag { JSTrue };
         enum JSFalseTag { JSFalse };
+        enum EncodeAsDoubleTag { EncodeAsDouble };
 
         JSValue();
         JSValue(JSNullTag);
@@ -90,6 +91,7 @@ namespace JSC {
         JSValue(const JSCell* ptr);
 
         // Numbers
+        JSValue(EncodeAsDoubleTag, ExecState*, double);
         JSValue(ExecState*, double);
         JSValue(ExecState*, char);
         JSValue(ExecState*, unsigned char);
@@ -135,8 +137,8 @@ namespace JSC {
         bool getBoolean() const; // false if not a boolean
         bool getNumber(double&) const;
         double uncheckedGetNumber() const;
-        bool getString(UString&) const;
-        UString getString() const; // null string if not a string
+        bool getString(ExecState* exec, UString&) const;
+        UString getString(ExecState* exec) const; // null string if not a string
         JSObject* getObject() const; // 0 if not an object
 
         CallType getCallData(CallData&);
@@ -156,6 +158,7 @@ namespace JSC {
         double toNumber(ExecState*) const;
         JSValue toJSNumber(ExecState*) const; // Fast path for when you expect that the value is an immediate number.
         UString toString(ExecState*) const;
+        UString toPrimitiveString(ExecState*) const;
         JSObject* toObject(ExecState*) const;
 
         // Integer conversions.
@@ -166,6 +169,10 @@ namespace JSC {
         uint32_t toUInt32(ExecState*) const;
         uint32_t toUInt32(ExecState*, bool& ok) const;
 
+#if ENABLE(JSC_ZOMBIES)
+        bool isZombie() const;
+#endif
+
         // Floating point conversions (this is a convenience method for webcore;
         // signle precision float is not a representation used in JS or JSC).
         float toFloat(ExecState* exec) const { return static_cast<float>(toNumber(exec)); }
@@ -186,9 +193,9 @@ namespace JSC {
         static bool equal(ExecState* exec, JSValue v1, JSValue v2);
         static bool equalSlowCase(ExecState* exec, JSValue v1, JSValue v2);
         static bool equalSlowCaseInline(ExecState* exec, JSValue v1, JSValue v2);
-        static bool strictEqual(JSValue v1, JSValue v2);
-        static bool strictEqualSlowCase(JSValue v1, JSValue v2);
-        static bool strictEqualSlowCaseInline(JSValue v1, JSValue v2);
+        static bool strictEqual(ExecState* exec, JSValue v1, JSValue v2);
+        static bool strictEqualSlowCase(ExecState* exec, JSValue v1, JSValue v2);
+        static bool strictEqualSlowCaseInline(ExecState* exec, JSValue v1, JSValue v2);
 
         JSValue getJSNumber(); // JSValue() if this is not a JSNumber or number object
 
@@ -228,7 +235,7 @@ namespace JSC {
         union {
             EncodedJSValue asEncodedJSValue;
             double asDouble;
-#if PLATFORM(BIG_ENDIAN)
+#if CPU(BIG_ENDIAN)
             struct {
                 int32_t tag;
                 int32_t payload;
@@ -279,6 +286,11 @@ namespace JSC {
         return b ? JSValue(JSValue::JSTrue) : JSValue(JSValue::JSFalse);
     }
 
+    ALWAYS_INLINE JSValue jsDoubleNumber(ExecState* exec, double d)
+    {
+        return JSValue(JSValue::EncodeAsDouble, exec, d);
+    }
+
     ALWAYS_INLINE JSValue jsNumber(ExecState* exec, double d)
     {
         return JSValue(exec, d);
@@ -373,6 +385,14 @@ namespace JSC {
         return static_cast<uint32_t>(val);
     }
 
+    // FIXME: We should deprecate this and just use JSValue::asCell() instead.
+    JSCell* asCell(JSValue);
+
+    inline JSCell* asCell(JSValue value)
+    {
+        return value.asCell();
+    }
+
     ALWAYS_INLINE int32_t JSValue::toInt32(ExecState* exec) const
     {
         if (isInt32())
@@ -423,6 +443,9 @@ namespace JSC {
     {
         JSValue v;
         v.u.asEncodedJSValue = encodedJSValue;
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!v.isZombie());
+#endif
         return v;
     }
 
@@ -469,6 +492,9 @@ namespace JSC {
         else
             u.asBits.tag = EmptyValueTag;
         u.asBits.payload = reinterpret_cast<int32_t>(ptr);
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!isZombie());
+#endif
     }
 
     inline JSValue::JSValue(const JSCell* ptr)
@@ -478,6 +504,9 @@ namespace JSC {
         else
             u.asBits.tag = EmptyValueTag;
         u.asBits.payload = reinterpret_cast<int32_t>(const_cast<JSCell*>(ptr));
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!isZombie());
+#endif
     }
 
     inline JSValue::operator bool() const
@@ -575,6 +604,11 @@ namespace JSC {
         return reinterpret_cast<JSCell*>(u.asBits.payload);
     }
 
+    ALWAYS_INLINE JSValue::JSValue(EncodeAsDoubleTag, ExecState*, double d)
+    {
+        u.asDouble = d;
+    }
+
     inline JSValue::JSValue(ExecState* exec, double d)
     {
         const int32_t asInt32 = static_cast<int32_t>(d);
@@ -773,11 +807,17 @@ namespace JSC {
     inline JSValue::JSValue(JSCell* ptr)
         : m_ptr(ptr)
     {
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!isZombie());
+#endif
     }
 
     inline JSValue::JSValue(const JSCell* ptr)
         : m_ptr(const_cast<JSCell*>(ptr))
     {
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!isZombie());
+#endif
     }
 
     inline JSValue::operator bool() const
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.cpp
index ac193ca..7365001 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.cpp
@@ -34,33 +34,23 @@
 
 namespace JSC {
 
-bool JSVariableObject::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool JSVariableObject::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
     if (symbolTable().contains(propertyName.ustring().rep()))
         return false;
 
-    return JSObject::deleteProperty(exec, propertyName, checkDontDelete);
+    return JSObject::deleteProperty(exec, propertyName);
 }
 
-void JSVariableObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void JSVariableObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
     SymbolTable::const_iterator end = symbolTable().end();
     for (SymbolTable::const_iterator it = symbolTable().begin(); it != end; ++it) {
-        if (!(it->second.getAttributes() & DontEnum) || includeNonEnumerable)
+        if (!(it->second.getAttributes() & DontEnum) || (mode == IncludeDontEnumProperties))
             propertyNames.add(Identifier(exec, it->first.get()));
     }
     
-    JSObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
-}
-
-bool JSVariableObject::getPropertyAttributes(ExecState* exec, const Identifier& propertyName, unsigned& attributes) const
-{
-    SymbolTableEntry entry = symbolTable().get(propertyName.ustring().rep());
-    if (!entry.isNull()) {
-        attributes = entry.getAttributes() | DontDelete;
-        return true;
-    }
-    return JSObject::getPropertyAttributes(exec, propertyName, attributes);
+    JSObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 bool JSVariableObject::isVariableObject() const
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.h
index fe92729..737816d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSVariableObject.h
@@ -48,22 +48,21 @@ namespace JSC {
 
         virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes) = 0;
 
-        virtual bool deleteProperty(ExecState*, const Identifier&, bool checkDontDelete = true);
-        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, bool includeNonEnumerable = false);
+        virtual bool deleteProperty(ExecState*, const Identifier&);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
         
         virtual bool isVariableObject() const;
         virtual bool isDynamicScope() const = 0;
 
-        virtual bool getPropertyAttributes(ExecState*, const Identifier& propertyName, unsigned& attributes) const;
-
         Register& registerAt(int index) const { return d->registers[index]; }
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultMark));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
         
     protected:
+        static const unsigned StructureFlags = OverridesGetPropertyNames | JSObject::StructureFlags;
         // Subclasses of JSVariableObject can subclass this struct to add data
         // without increasing their own size (since there's a hard limit on the
         // size of a JSCell).
@@ -84,7 +83,7 @@ namespace JSC {
             JSVariableObjectData& operator=(const JSVariableObjectData&);
         };
 
-        JSVariableObject(PassRefPtr<Structure> structure, JSVariableObjectData* data)
+        JSVariableObject(NonNullPassRefPtr<Structure> structure, JSVariableObjectData* data)
             : JSObject(structure)
             , d(data) // Subclass owns this pointer.
         {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSWrapperObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSWrapperObject.h
index b56a58d..191ff3b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSWrapperObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSWrapperObject.h
@@ -30,7 +30,7 @@ namespace JSC {
     // Number, Boolean and Date which are wrappers for primitive types.
     class JSWrapperObject : public JSObject {
     protected:
-        explicit JSWrapperObject(PassRefPtr<Structure>);
+        explicit JSWrapperObject(NonNullPassRefPtr<Structure>);
 
     public:
         JSValue internalValue() const { return m_internalValue; }
@@ -38,7 +38,7 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype) 
         { 
-            return Structure::create(prototype, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultGetPropertyNames | HasDefaultMark));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
     private:
@@ -47,7 +47,7 @@ namespace JSC {
         JSValue m_internalValue;
     };
 
-    inline JSWrapperObject::JSWrapperObject(PassRefPtr<Structure> structure)
+    inline JSWrapperObject::JSWrapperObject(NonNullPassRefPtr<Structure> structure)
         : JSObject(structure)
     {
         addAnonymousSlots(1);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSZombie.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSZombie.cpp
new file mode 100644
index 0000000..072d29b
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSZombie.cpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "JSZombie.h"
+#include "ClassInfo.h"
+
+#if ENABLE(JSC_ZOMBIES)
+
+namespace JSC {
+
+const ClassInfo JSZombie::s_info = { "Zombie", 0, 0, 0 };
+
+Structure* JSZombie::leakedZombieStructure() {
+    static Structure* structure = 0;
+    if (!structure) {
+        Structure::startIgnoringLeaks();
+        structure = Structure::create(jsNull(), TypeInfo(UnspecifiedType)).releaseRef();
+        Structure::stopIgnoringLeaks();
+    }
+    return structure;
+}
+
+}
+
+#endif // ENABLE(JSC_ZOMBIES)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSZombie.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSZombie.h
new file mode 100644
index 0000000..8b33ea6
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSZombie.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef JSZombie_h
+#define JSZombie_h
+
+#include "JSCell.h"
+
+#if ENABLE(JSC_ZOMBIES)
+namespace JSC {
+
+class JSZombie : public JSCell {
+public:
+    JSZombie(const ClassInfo* oldInfo, Structure* structure)
+        : JSCell(structure)
+        , m_oldInfo(oldInfo)
+    {
+    }
+    virtual bool isZombie() const { return true; }
+    virtual const ClassInfo* classInfo() const { return &s_info; }
+    static Structure* leakedZombieStructure();
+
+    virtual bool isGetterSetter() const { ASSERT_NOT_REACHED(); return false; }
+    virtual bool isAPIValueWrapper() const { ASSERT_NOT_REACHED(); return false; }
+    virtual bool isPropertyNameIterator() const { ASSERT_NOT_REACHED(); return false; }
+    virtual CallType getCallData(CallData&) { ASSERT_NOT_REACHED(); return CallTypeNone; }
+    virtual ConstructType getConstructData(ConstructData&) { ASSERT_NOT_REACHED(); return ConstructTypeNone; }
+    virtual bool getUInt32(uint32_t&) const { ASSERT_NOT_REACHED(); return false; }
+    virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const { ASSERT_NOT_REACHED(); return jsNull(); }
+    virtual bool getPrimitiveNumber(ExecState*, double&, JSValue&) { ASSERT_NOT_REACHED(); return false; }
+    virtual bool toBoolean(ExecState*) const { ASSERT_NOT_REACHED(); return false; }
+    virtual double toNumber(ExecState*) const { ASSERT_NOT_REACHED(); return 0.0; }
+    virtual UString toString(ExecState*) const { ASSERT_NOT_REACHED(); return ""; }
+    virtual JSObject* toObject(ExecState*) const { ASSERT_NOT_REACHED(); return 0; }
+    virtual void markChildren(MarkStack&) { ASSERT_NOT_REACHED(); }
+    virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&) { ASSERT_NOT_REACHED(); }
+    virtual void put(ExecState*, unsigned, JSValue) { ASSERT_NOT_REACHED(); }
+    virtual bool deleteProperty(ExecState*, const Identifier&) { ASSERT_NOT_REACHED(); return false; }
+    virtual bool deleteProperty(ExecState*, unsigned) { ASSERT_NOT_REACHED(); return false; }
+    virtual JSObject* toThisObject(ExecState*) const { ASSERT_NOT_REACHED(); return 0; }
+    virtual UString toThisString(ExecState*) const { ASSERT_NOT_REACHED(); return ""; }
+    virtual JSString* toThisJSString(ExecState*) { ASSERT_NOT_REACHED(); return 0; }
+    virtual JSValue getJSNumber() { ASSERT_NOT_REACHED(); return jsNull(); }
+    virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&) { ASSERT_NOT_REACHED(); return false; }
+    virtual bool getOwnPropertySlot(ExecState*, unsigned, PropertySlot&) { ASSERT_NOT_REACHED(); return false; }
+    
+    static const ClassInfo s_info;
+private:
+    const ClassInfo* m_oldInfo;
+};
+
+}
+
+#endif // ENABLE(JSC_ZOMBIES)
+
+#endif // JSZombie_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/LiteralParser.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/LiteralParser.cpp
index d242282..aa1e5ed 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/LiteralParser.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/LiteralParser.cpp
@@ -29,6 +29,7 @@
 #include "JSArray.h"
 #include "JSString.h"
 #include "Lexer.h"
+#include "StringBuilder.h"
 #include <wtf/ASCIICType.h>
 #include <wtf/dtoa.h>
 
@@ -134,48 +135,48 @@ template <LiteralParser::ParserMode mode> inline LiteralParser::TokenType Litera
 {
     ++m_ptr;
     const UChar* runStart;
-    token.stringToken = UString();
+    StringBuilder builder;
     do {
         runStart = m_ptr;
         while (m_ptr < m_end && isSafeStringCharacter<mode>(*m_ptr))
             ++m_ptr;
         if (runStart < m_ptr)
-            token.stringToken.append(runStart, m_ptr - runStart);
+            builder.append(runStart, m_ptr - runStart);
         if ((mode == StrictJSON) && m_ptr < m_end && *m_ptr == '\\') {
             ++m_ptr;
             if (m_ptr >= m_end)
                 return TokError;
             switch (*m_ptr) {
                 case '"':
-                    token.stringToken.append('"');
+                    builder.append('"');
                     m_ptr++;
                     break;
                 case '\\':
-                    token.stringToken.append('\\');
+                    builder.append('\\');
                     m_ptr++;
                     break;
                 case '/':
-                    token.stringToken.append('/');
+                    builder.append('/');
                     m_ptr++;
                     break;
                 case 'b':
-                    token.stringToken.append('\b');
+                    builder.append('\b');
                     m_ptr++;
                     break;
                 case 'f':
-                    token.stringToken.append('\f');
+                    builder.append('\f');
                     m_ptr++;
                     break;
                 case 'n':
-                    token.stringToken.append('\n');
+                    builder.append('\n');
                     m_ptr++;
                     break;
                 case 'r':
-                    token.stringToken.append('\r');
+                    builder.append('\r');
                     m_ptr++;
                     break;
                 case 't':
-                    token.stringToken.append('\t');
+                    builder.append('\t');
                     m_ptr++;
                     break;
 
@@ -186,7 +187,7 @@ template <LiteralParser::ParserMode mode> inline LiteralParser::TokenType Litera
                         if (!isASCIIHexDigit(m_ptr[i]))
                             return TokError;
                     }
-                    token.stringToken.append(JSC::Lexer::convertUnicode(m_ptr[1], m_ptr[2], m_ptr[3], m_ptr[4]));
+                    builder.append(JSC::Lexer::convertUnicode(m_ptr[1], m_ptr[2], m_ptr[3], m_ptr[4]));
                     m_ptr += 5;
                     break;
 
@@ -199,6 +200,7 @@ template <LiteralParser::ParserMode mode> inline LiteralParser::TokenType Litera
     if (m_ptr >= m_end || *m_ptr != '"')
         return TokError;
 
+    token.stringToken = builder.release();
     token.type = TokString;
     token.end = ++m_ptr;
     return TokString;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.cpp
index 8359ff7..4e9e086 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.cpp
@@ -34,7 +34,7 @@ void HashTable::createTable(JSGlobalData* globalData) const
         entries[i].setKey(0);
     for (int i = 0; values[i].key; ++i) {
         UString::Rep* identifier = Identifier::add(globalData, values[i].key).releaseRef();
-        int hashIndex = identifier->computedHash() & compactHashSizeMask;
+        int hashIndex = identifier->existingHash() & compactHashSizeMask;
         HashEntry* entry = &entries[hashIndex];
 
         if (entry->key()) {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.h
index 4d70689..e673c09 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Lookup.h
@@ -144,7 +144,7 @@ namespace JSC {
         {
             ASSERT(table);
 
-            const HashEntry* entry = &table[identifier.ustring().rep()->computedHash() & compactHashSizeMask];
+            const HashEntry* entry = &table[identifier.ustring().rep()->existingHash() & compactHashSizeMask];
 
             if (!entry->key())
                 return 0;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStack.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStack.h
index 5bc85fa..c551bac 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStack.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStack.h
@@ -47,7 +47,7 @@ namespace JSC {
         }
 
         ALWAYS_INLINE void append(JSValue);
-        ALWAYS_INLINE void append(JSCell*);
+        void append(JSCell*);
         
         ALWAYS_INLINE void appendValues(Register* values, size_t count, MarkSetProperties properties = NoNullValues)
         {
@@ -153,7 +153,7 @@ namespace JSC {
                 ASSERT(0 == (size % MarkStack::pageSize()));
                 if (size == m_allocated)
                     return;
-#if PLATFORM(WIN)
+#if OS(WINDOWS) || OS(SYMBIAN) || PLATFORM(BREWMP)
                 // We cannot release a part of a region with VirtualFree.  To get around this,
                 // we'll release the entire region and reallocate the size that we want.
                 releaseStack(m_data, m_allocated);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackNone.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackNone.cpp
new file mode 100644
index 0000000..b1ff48b
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackNone.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2009 Company 100, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include "MarkStack.h"
+
+#include "FastMalloc.h"
+
+namespace JSC {
+
+void MarkStack::initializePagesize()
+{
+    MarkStack::s_pageSize = 4096;
+}
+
+void* MarkStack::allocateStack(size_t size)
+{
+    return fastMalloc(size);
+}
+
+void MarkStack::releaseStack(void* addr, size_t)
+{
+    return fastFree(addr);
+}
+
+}
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackPosix.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackPosix.cpp
index aec968e..de5e8ba 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackPosix.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackPosix.cpp
@@ -24,49 +24,29 @@
  */
 
 #include "config.h"
-
-
 #include "MarkStack.h"
 
+#if OS(UNIX) && !OS(SYMBIAN)
+
 #include <unistd.h>
-#if defined (__SYMBIAN32__)
-#include "wtf/FastMalloc.h"
-#include <e32base.h>
-#include <e32std.h>
-#include <e32hal.h>
-#include <hal.h>
-#else
 #include <sys/mman.h>
-#endif
 
 namespace JSC {
 
 void MarkStack::initializePagesize()
 {
-#if defined (__SYMBIAN32__)
-    TInt page_size;
-    UserHal::PageSizeInBytes(page_size);
-    MarkStack::s_pageSize = page_size;
-#else
     MarkStack::s_pageSize = getpagesize();
-#endif
 }
 
 void* MarkStack::allocateStack(size_t size)
 {
-#if defined (__SYMBIAN32__)
-    return fastMalloc(size);
-#else
     return mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
-#endif
 }
 void MarkStack::releaseStack(void* addr, size_t size)
 {
-#if defined (__SYMBIAN32__)
-    fastFree(addr);
-#else
     munmap(reinterpret_cast<char*>(addr), size);
-#endif
 }
 
 }
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackSymbian.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackSymbian.cpp
new file mode 100644
index 0000000..bda14ac
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackSymbian.cpp
@@ -0,0 +1,48 @@
+/*
+    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include "config.h"
+#include "MarkStack.h"
+
+#if OS(SYMBIAN)
+
+#include <e32hal.h>
+
+namespace JSC {
+
+void MarkStack::initializePagesize()
+{
+    TInt page_size;
+    UserHal::PageSizeInBytes(page_size);
+    MarkStack::s_pageSize = page_size;
+}
+
+void* MarkStack::allocateStack(size_t size)
+{
+    return fastMalloc(size);
+}
+
+void MarkStack::releaseStack(void* addr, size_t size)
+{
+    return fastFree(addr);
+}
+
+}
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackWin.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackWin.cpp
index 1fdd06a..a171c78 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackWin.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MarkStackWin.cpp
@@ -24,10 +24,10 @@
  */
 
 #include "config.h"
-
-
 #include "MarkStack.h"
 
+#if OS(WINDOWS)
+
 #include "windows.h"
 
 namespace JSC {
@@ -51,3 +51,5 @@ void MarkStack::releaseStack(void* addr, size_t)
 }
 
 }
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.cpp
index 36771ab..98ff3ba 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.cpp
@@ -85,7 +85,7 @@ const ClassInfo MathObject::info = { "Math", 0, 0, ExecState::mathTable };
 @end
 */
 
-MathObject::MathObject(ExecState* exec, PassRefPtr<Structure> structure)
+MathObject::MathObject(ExecState* exec, NonNullPassRefPtr<Structure> structure)
     : JSObject(structure)
 {
     putDirectWithoutTransition(Identifier(exec, "E"), jsNumber(exec, exp(1.0)), DontDelete | DontEnum | ReadOnly);
@@ -96,7 +96,6 @@ MathObject::MathObject(ExecState* exec, PassRefPtr<Structure> structure)
     putDirectWithoutTransition(Identifier(exec, "PI"), jsNumber(exec, piDouble), DontDelete | DontEnum | ReadOnly);
     putDirectWithoutTransition(Identifier(exec, "SQRT1_2"), jsNumber(exec, sqrt(0.5)), DontDelete | DontEnum | ReadOnly);
     putDirectWithoutTransition(Identifier(exec, "SQRT2"), jsNumber(exec, sqrt(2.0)), DontDelete | DontEnum | ReadOnly);
-    WTF::initializeWeakRandomNumberGenerator();
 }
 
 // ECMA 15.8
@@ -120,22 +119,22 @@ JSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState* exec, JSObject*, JSValue, cons
 
 JSValue JSC_HOST_CALL mathProtoFuncACos(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, acos(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, acos(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncASin(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, asin(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, asin(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncATan(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, atan(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, atan(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncATan2(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, atan2(args.at(0).toNumber(exec), args.at(1).toNumber(exec)));
+    return jsDoubleNumber(exec, atan2(args.at(0).toNumber(exec), args.at(1).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncCeil(ExecState* exec, JSObject*, JSValue, const ArgList& args)
@@ -145,12 +144,12 @@ JSValue JSC_HOST_CALL mathProtoFuncCeil(ExecState* exec, JSObject*, JSValue, con
 
 JSValue JSC_HOST_CALL mathProtoFuncCos(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, cos(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, cos(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncExp(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, exp(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, exp(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncFloor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
@@ -160,7 +159,7 @@ JSValue JSC_HOST_CALL mathProtoFuncFloor(ExecState* exec, JSObject*, JSValue, co
 
 JSValue JSC_HOST_CALL mathProtoFuncLog(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, log(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, log(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncMax(ExecState* exec, JSObject*, JSValue, const ArgList& args)
@@ -211,7 +210,7 @@ JSValue JSC_HOST_CALL mathProtoFuncPow(ExecState* exec, JSObject*, JSValue, cons
 
 JSValue JSC_HOST_CALL mathProtoFuncRandom(ExecState* exec, JSObject*, JSValue, const ArgList&)
 {
-    return jsNumber(exec, WTF::weakRandomNumber());
+    return jsDoubleNumber(exec, exec->globalData().weakRandom.get());
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncRound(ExecState* exec, JSObject*, JSValue, const ArgList& args)
@@ -224,17 +223,17 @@ JSValue JSC_HOST_CALL mathProtoFuncRound(ExecState* exec, JSObject*, JSValue, co
 
 JSValue JSC_HOST_CALL mathProtoFuncSin(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, sin(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, sin(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, sqrt(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, sqrt(args.at(0).toNumber(exec)));
 }
 
 JSValue JSC_HOST_CALL mathProtoFuncTan(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
-    return jsNumber(exec, tan(args.at(0).toNumber(exec)));
+    return jsDoubleNumber(exec, tan(args.at(0).toNumber(exec)));
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.h
index a2e065f..7f474b8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/MathObject.h
@@ -27,7 +27,7 @@ namespace JSC {
 
     class MathObject : public JSObject {
     public:
-        MathObject(ExecState*, PassRefPtr<Structure>);
+        MathObject(ExecState*, NonNullPassRefPtr<Structure>);
 
         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
@@ -37,8 +37,11 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasDefaultMark | HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
+
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | JSObject::StructureFlags;
     };
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.cpp
index 0205fc5..403fc7e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.cpp
@@ -32,8 +32,8 @@ ASSERT_CLASS_FITS_IN_CELL(NativeErrorConstructor);
 
 const ClassInfo NativeErrorConstructor::info = { "Function", &InternalFunction::info, 0, 0 };
 
-NativeErrorConstructor::NativeErrorConstructor(ExecState* exec, PassRefPtr<Structure> structure, NativeErrorPrototype* nativeErrorPrototype)
-    : InternalFunction(&exec->globalData(), structure, Identifier(exec, nativeErrorPrototype->getDirect(exec->propertyNames().name).getString()))
+NativeErrorConstructor::NativeErrorConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, NativeErrorPrototype* nativeErrorPrototype)
+    : InternalFunction(&exec->globalData(), structure, Identifier(exec, nativeErrorPrototype->getDirect(exec->propertyNames().name).getString(exec)))
     , m_errorStructure(ErrorInstance::createStructure(nativeErrorPrototype))
 {
     putDirect(exec->propertyNames().length, jsNumber(exec, 1), DontDelete | ReadOnly | DontEnum); // ECMA 15.11.7.5
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.h
index 118d1f4..152dbac 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorConstructor.h
@@ -31,7 +31,7 @@ namespace JSC {
 
     class NativeErrorConstructor : public InternalFunction {
     public:
-        NativeErrorConstructor(ExecState*, PassRefPtr<Structure>, NativeErrorPrototype*);
+        NativeErrorConstructor(ExecState*, NonNullPassRefPtr<Structure>, NativeErrorPrototype*);
 
         static const ClassInfo info;
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.cpp
index 650a0fd..ca12798 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.cpp
@@ -29,7 +29,7 @@ namespace JSC {
 
 ASSERT_CLASS_FITS_IN_CELL(NativeErrorPrototype);
 
-NativeErrorPrototype::NativeErrorPrototype(ExecState* exec, PassRefPtr<Structure> structure, const UString& name, const UString& message)
+NativeErrorPrototype::NativeErrorPrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure, const UString& name, const UString& message)
 #ifdef QT_BUILD_SCRIPT_LIB
     : ErrorInstance(structure)
 #else
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.h
index 48a9d7e..39a02c8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NativeErrorPrototype.h
@@ -36,7 +36,7 @@ namespace JSC {
 #endif
     {
     public:
-        NativeErrorPrototype(ExecState*, PassRefPtr<Structure>, const UString& name, const UString& message);
+        NativeErrorPrototype(ExecState*, NonNullPassRefPtr<Structure>, const UString& name, const UString& message);
     };
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.cpp
index a95106d..cc6c51d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.cpp
@@ -53,7 +53,7 @@ const ClassInfo NumberConstructor::info = { "Function", &InternalFunction::info,
 @end
 */
 
-NumberConstructor::NumberConstructor(ExecState* exec, PassRefPtr<Structure> structure, NumberPrototype* numberPrototype)
+NumberConstructor::NumberConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, NumberPrototype* numberPrototype)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, numberPrototype->info.className))
 {
     // Number.Prototype
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.h
index 710ac86..cf19b6f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class NumberConstructor : public InternalFunction {
     public:
-        NumberConstructor(ExecState*, PassRefPtr<Structure>, NumberPrototype*);
+        NumberConstructor(ExecState*, NonNullPassRefPtr<Structure>, NumberPrototype*);
 
         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
@@ -39,11 +39,14 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue proto) 
         { 
-            return Structure::create(proto, TypeInfo(ObjectType, ImplementsHasInstance | HasDefaultMark | HasDefaultGetPropertyNames)); 
+            return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); 
         }
 
         enum { NaNValue, NegInfinity, PosInfinity, MaxValue, MinValue };
 
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | InternalFunction::StructureFlags;
+
     private:
         virtual ConstructType getConstructData(ConstructData&);
         virtual CallType getCallData(CallData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.cpp
index 0e8df17..1a7e44c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.cpp
@@ -31,7 +31,7 @@ ASSERT_CLASS_FITS_IN_CELL(NumberObject);
 
 const ClassInfo NumberObject::info = { "Number", 0, 0, 0 };
 
-NumberObject::NumberObject(PassRefPtr<Structure> structure)
+NumberObject::NumberObject(NonNullPassRefPtr<Structure> structure)
     : JSWrapperObject(structure)
 {
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.h
index f502bee..8223a90 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberObject.h
@@ -27,20 +27,22 @@ namespace JSC {
 
     class NumberObject : public JSWrapperObject {
     public:
-        explicit NumberObject(PassRefPtr<Structure>);
+        explicit NumberObject(NonNullPassRefPtr<Structure>);
 
         static const ClassInfo info;
-#if USE(JSVALUE32)
+
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
+
+    protected:
+#if USE(JSVALUE32)
+        static const unsigned StructureFlags = OverridesMarkChildren | JSWrapperObject::StructureFlags;
 #else
-        static PassRefPtr<Structure> createStructure(JSValue prototype)
-        {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasStandardGetOwnPropertySlot | HasDefaultMark | HasDefaultGetPropertyNames));
-        }
+        static const unsigned StructureFlags = JSWrapperObject::StructureFlags;
 #endif
+
     private:
         virtual const ClassInfo* classInfo() const { return &info; }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.cpp
index 947324c..67210fa 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.cpp
@@ -25,9 +25,10 @@
 #include "Error.h"
 #include "JSFunction.h"
 #include "JSString.h"
+#include "Operations.h"
 #include "PrototypeFunction.h"
+#include "StringBuilder.h"
 #include "dtoa.h"
-#include "Operations.h"
 #include <wtf/Assertions.h>
 #include <wtf/MathExtras.h>
 #include <wtf/Vector.h>
@@ -45,7 +46,7 @@ static JSValue JSC_HOST_CALL numberProtoFuncToPrecision(ExecState*, JSObject*, J
 
 // ECMA 15.7.4
 
-NumberPrototype::NumberPrototype(ExecState* exec, PassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
+NumberPrototype::NumberPrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
     : NumberObject(structure)
 {
     setInternalValue(jsNumber(exec, 0));
@@ -73,11 +74,12 @@ static UString integerPartNoExp(double d)
     bool resultIsInfOrNan = (decimalPoint == 9999);
     size_t length = strlen(result);
 
-    UString str = sign ? "-" : "";
+    StringBuilder builder;
+    builder.append(sign ? "-" : "");
     if (resultIsInfOrNan)
-        str += result;
+        builder.append((const char*)result);
     else if (decimalPoint <= 0)
-        str += "0";
+        builder.append("0");
     else {
         Vector<char, 1024> buf(decimalPoint + 1);
 
@@ -89,10 +91,10 @@ static UString integerPartNoExp(double d)
             strncpy(buf.data(), result, decimalPoint);
         buf[decimalPoint] = '\0';
 
-        str.append(buf.data());
+        builder.append((const char*)(buf.data()));
     }
 
-    return str;
+    return builder.release();
 }
 
 static UString charSequence(char c, int count)
@@ -236,13 +238,16 @@ JSValue JSC_HOST_CALL numberProtoFuncToFixed(ExecState* exec, JSObject*, JSValue
 
     UString s;
     if (x < 0) {
-        s.append('-');
+        s = "-";
         x = -x;
-    } else if (x == -0.0)
-        x = 0;
+    } else {
+        s = "";
+        if (x == -0.0)
+            x = 0;
+    }
 
     if (x >= pow(10.0, 21.0))
-        return jsString(exec, s + UString::from(x));
+        return jsString(exec, makeString(s, UString::from(x)));
 
     const double tenToTheF = pow(10.0, f);
     double n = floor(x * tenToTheF);
@@ -253,17 +258,19 @@ JSValue JSC_HOST_CALL numberProtoFuncToFixed(ExecState* exec, JSObject*, JSValue
 
     int k = m.size();
     if (k <= f) {
-        UString z;
+        StringBuilder z;
         for (int i = 0; i < f + 1 - k; i++)
             z.append('0');
-        m = z + m;
+        z.append(m);
+        m = z.release();
         k = f + 1;
         ASSERT(k == m.size());
     }
     int kMinusf = k - f;
+
     if (kMinusf < m.size())
-        return jsString(exec, s + m.substr(0, kMinusf) + "." + m.substr(kMinusf));
-    return jsString(exec, s + m.substr(0, kMinusf));
+        return jsString(exec, makeString(s, m.substr(0, kMinusf), ".", m.substr(kMinusf)));
+    return jsString(exec, makeString(s, m.substr(0, kMinusf)));
 }
 
 static void fractionalPartToString(char* buf, int& i, const char* result, int resultLength, int fractionalDigits)
@@ -391,7 +398,8 @@ JSValue JSC_HOST_CALL numberProtoFuncToPrecision(ExecState* exec, JSObject*, JSV
     if (x < 0) {
         s = "-";
         x = -x;
-    }
+    } else
+        s = "";
 
     if (!(doublePrecision >= 1 && doublePrecision <= 21)) // true for NaN
         return throwError(exec, RangeError, "toPrecision() argument must be between 1 and 21");
@@ -422,10 +430,10 @@ JSValue JSC_HOST_CALL numberProtoFuncToPrecision(ExecState* exec, JSObject*, JSV
         m = integerPartNoExp(n);
         if (e < -6 || e >= precision) {
             if (m.size() > 1)
-                m = m.substr(0, 1) + "." + m.substr(1);
+                m = makeString(m.substr(0, 1), ".", m.substr(1));
             if (e >= 0)
-                return jsNontrivialString(exec, s + m + "e+" + UString::from(e));
-            return jsNontrivialString(exec, s + m + "e-" + UString::from(-e));
+                return jsNontrivialString(exec, makeString(s, m, "e+", UString::from(e)));
+            return jsNontrivialString(exec, makeString(s, m, "e-", UString::from(-e)));
         }
     } else {
         m = charSequence('0', precision);
@@ -433,13 +441,13 @@ JSValue JSC_HOST_CALL numberProtoFuncToPrecision(ExecState* exec, JSObject*, JSV
     }
 
     if (e == precision - 1)
-        return jsString(exec, s + m);
+        return jsString(exec, makeString(s, m));
     if (e >= 0) {
         if (e + 1 < m.size())
-            return jsString(exec, s + m.substr(0, e + 1) + "." + m.substr(e + 1));
-        return jsString(exec, s + m);
+            return jsString(exec, makeString(s, m.substr(0, e + 1), ".", m.substr(e + 1)));
+        return jsString(exec, makeString(s, m));
     }
-    return jsNontrivialString(exec, s + "0." + charSequence('0', -(e + 1)) + m);
+    return jsNontrivialString(exec, makeString(s, "0.", charSequence('0', -(e + 1)), m));
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.h
index 0a3a544..1fb2077 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberPrototype.h
@@ -27,7 +27,7 @@ namespace JSC {
 
     class NumberPrototype : public NumberObject {
     public:
-        NumberPrototype(ExecState*, PassRefPtr<Structure>, Structure* prototypeFunctionStructure);
+        NumberPrototype(ExecState*, NonNullPassRefPtr<Structure>, Structure* prototypeFunctionStructure);
     };
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.cpp
index 2992f1b..0838eb4 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.cpp
@@ -36,12 +36,13 @@ ASSERT_CLASS_FITS_IN_CELL(ObjectConstructor);
 
 static JSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState*, JSObject*, JSValue, const ArgList&);
+static JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL objectConstructorKeys(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL objectConstructorCreate(ExecState*, JSObject*, JSValue, const ArgList&);
 
-ObjectConstructor::ObjectConstructor(ExecState* exec, PassRefPtr<Structure> structure, ObjectPrototype* objectPrototype, Structure* prototypeFunctionStructure)
+ObjectConstructor::ObjectConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, ObjectPrototype* objectPrototype, Structure* prototypeFunctionStructure)
 : InternalFunction(&exec->globalData(), structure, Identifier(exec, "Object"))
 {
     // ECMA 15.2.3.1
@@ -52,6 +53,7 @@ ObjectConstructor::ObjectConstructor(ExecState* exec, PassRefPtr<Structure> stru
     
     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().getPrototypeOf, objectConstructorGetPrototypeOf), DontEnum);
     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 2, exec->propertyNames().getOwnPropertyDescriptor, objectConstructorGetOwnPropertyDescriptor), DontEnum);
+    putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().getOwnPropertyNames, objectConstructorGetOwnPropertyNames), DontEnum);
     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().keys, objectConstructorKeys), DontEnum);
     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 3, exec->propertyNames().defineProperty, objectConstructorDefineProperty), DontEnum);
     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 2, exec->propertyNames().defineProperties, objectConstructorDefineProperties), DontEnum);
@@ -125,6 +127,21 @@ JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState* exec,
     return description;
 }
 
+// FIXME: Use the enumeration cache.
+JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+    if (!args.at(0).isObject())
+        return throwError(exec, TypeError, "Requested property names of a value that is not an object.");
+    PropertyNameArray properties(exec);
+    asObject(args.at(0))->getOwnPropertyNames(exec, properties, IncludeDontEnumProperties);
+    JSArray* names = constructEmptyArray(exec);
+    size_t numProperties = properties.size();
+    for (size_t i = 0; i < numProperties; i++)
+        names->push(exec, jsOwnedString(exec, properties[i].ustring()));
+    return names;
+}
+
+// FIXME: Use the enumeration cache.
 JSValue JSC_HOST_CALL objectConstructorKeys(ExecState* exec, JSObject*, JSValue, const ArgList& args)
 {
     if (!args.at(0).isObject())
@@ -147,14 +164,14 @@ static bool toPropertyDescriptor(ExecState* exec, JSValue in, PropertyDescriptor
     }
     JSObject* description = asObject(in);
 
-    PropertySlot enumerableSlot;
+    PropertySlot enumerableSlot(description);
     if (description->getPropertySlot(exec, exec->propertyNames().enumerable, enumerableSlot)) {
         desc.setEnumerable(enumerableSlot.getValue(exec, exec->propertyNames().enumerable).toBoolean(exec));
         if (exec->hadException())
             return false;
     }
 
-    PropertySlot configurableSlot;
+    PropertySlot configurableSlot(description);
     if (description->getPropertySlot(exec, exec->propertyNames().configurable, configurableSlot)) {
         desc.setConfigurable(configurableSlot.getValue(exec, exec->propertyNames().configurable).toBoolean(exec));
         if (exec->hadException())
@@ -162,21 +179,21 @@ static bool toPropertyDescriptor(ExecState* exec, JSValue in, PropertyDescriptor
     }
 
     JSValue value;
-    PropertySlot valueSlot;
+    PropertySlot valueSlot(description);
     if (description->getPropertySlot(exec, exec->propertyNames().value, valueSlot)) {
         desc.setValue(valueSlot.getValue(exec, exec->propertyNames().value));
         if (exec->hadException())
             return false;
     }
 
-    PropertySlot writableSlot;
+    PropertySlot writableSlot(description);
     if (description->getPropertySlot(exec, exec->propertyNames().writable, writableSlot)) {
         desc.setWritable(writableSlot.getValue(exec, exec->propertyNames().writable).toBoolean(exec));
         if (exec->hadException())
             return false;
     }
 
-    PropertySlot getSlot;
+    PropertySlot getSlot(description);
     if (description->getPropertySlot(exec, exec->propertyNames().get, getSlot)) {
         JSValue get = getSlot.getValue(exec, exec->propertyNames().get);
         if (exec->hadException())
@@ -192,7 +209,7 @@ static bool toPropertyDescriptor(ExecState* exec, JSValue in, PropertyDescriptor
         desc.setGetter(get);
     }
 
-    PropertySlot setSlot;
+    PropertySlot setSlot(description);
     if (description->getPropertySlot(exec, exec->propertyNames().set, setSlot)) {
         JSValue set = setSlot.getValue(exec, exec->propertyNames().set);
         if (exec->hadException())
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.h
index 9373781..1d2cdde 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectConstructor.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class ObjectConstructor : public InternalFunction {
     public:
-        ObjectConstructor(ExecState*, PassRefPtr<Structure>, ObjectPrototype*, Structure* prototypeFunctionStructure);
+        ObjectConstructor(ExecState*, NonNullPassRefPtr<Structure>, ObjectPrototype*, Structure* prototypeFunctionStructure);
 
     private:
         virtual ConstructType getConstructData(ConstructData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.cpp
index fccc44a..3065c6d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.cpp
@@ -40,7 +40,7 @@ static JSValue JSC_HOST_CALL objectProtoFuncLookupSetter(ExecState*, JSObject*,
 static JSValue JSC_HOST_CALL objectProtoFuncPropertyIsEnumerable(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL objectProtoFuncToLocaleString(ExecState*, JSObject*, JSValue, const ArgList&);
 
-ObjectPrototype::ObjectPrototype(ExecState* exec, PassRefPtr<Structure> stucture, Structure* prototypeFunctionStructure)
+ObjectPrototype::ObjectPrototype(ExecState* exec, NonNullPassRefPtr<Structure> stucture, Structure* prototypeFunctionStructure)
     : JSObject(stucture)
     , m_hasNoPropertiesWithUInt32Names(true)
 {
@@ -148,7 +148,7 @@ JSValue JSC_HOST_CALL objectProtoFuncToLocaleString(ExecState* exec, JSObject*,
 
 JSValue JSC_HOST_CALL objectProtoFuncToString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
-    return jsNontrivialString(exec, "[object " + thisValue.toThisObject(exec)->className() + "]");
+    return jsNontrivialString(exec, makeString("[object ", thisValue.toThisObject(exec)->className(), "]"));
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.h
index 6dd3c28..489d962 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ObjectPrototype.h
@@ -27,7 +27,7 @@ namespace JSC {
 
     class ObjectPrototype : public JSObject {
     public:
-        ObjectPrototype(ExecState*, PassRefPtr<Structure>, Structure* prototypeFunctionStructure);
+        ObjectPrototype(ExecState*, NonNullPassRefPtr<Structure>, Structure* prototypeFunctionStructure);
 
     private:
         virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.cpp
index 093bbec..0e1887c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.cpp
@@ -29,10 +29,6 @@
 #include <stdio.h>
 #include <wtf/MathExtras.h>
 
-#if HAVE(FLOAT_H)
-#include <float.h>
-#endif
-
 namespace JSC {
 
 bool JSValue::equalSlowCase(ExecState* exec, JSValue v1, JSValue v2)
@@ -40,9 +36,9 @@ bool JSValue::equalSlowCase(ExecState* exec, JSValue v1, JSValue v2)
     return equalSlowCaseInline(exec, v1, v2);
 }
 
-bool JSValue::strictEqualSlowCase(JSValue v1, JSValue v2)
+bool JSValue::strictEqualSlowCase(ExecState* exec, JSValue v1, JSValue v2)
 {
-    return strictEqualSlowCaseInline(v1, v2);
+    return strictEqualSlowCaseInline(exec, v1, v2);
 }
 
 NEVER_INLINE JSValue throwOutOfMemoryError(ExecState* exec)
@@ -58,12 +54,13 @@ NEVER_INLINE JSValue jsAddSlowCase(CallFrame* callFrame, JSValue v1, JSValue v2)
     JSValue p1 = v1.toPrimitive(callFrame);
     JSValue p2 = v2.toPrimitive(callFrame);
 
-    if (p1.isString() || p2.isString()) {
-        RefPtr<UString::Rep> value = concatenate(p1.toString(callFrame).rep(), p2.toString(callFrame).rep());
-        if (!value)
-            return throwOutOfMemoryError(callFrame);
-        return jsString(callFrame, value.release());
+    if (p1.isString()) {
+        return p2.isString()
+            ? jsString(callFrame, asString(p1), asString(p2))
+            : jsString(callFrame, asString(p1), p2.toString(callFrame));
     }
+    if (p2.isString())
+        return jsString(callFrame, p1.toString(callFrame), asString(p2));
 
     return jsNumber(callFrame, p1.toNumber(callFrame) + p2.toNumber(callFrame));
 }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.h
index 21120f5..d1d6eaa 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Operations.h
@@ -35,6 +35,136 @@ namespace JSC {
     bool jsIsObjectType(JSValue);
     bool jsIsFunctionType(JSValue);
 
+    ALWAYS_INLINE JSValue jsString(ExecState* exec, JSString* s1, JSString* s2)
+    {
+        if (!s1->length())
+            return s2;
+        if (!s2->length())
+            return s1;
+
+        unsigned ropeLength = s1->ropeLength() + s2->ropeLength();
+        JSGlobalData* globalData = &exec->globalData();
+
+        if (ropeLength <= JSString::s_maxInternalRopeLength)
+            return new (globalData) JSString(globalData, ropeLength, s1, s2);
+
+        unsigned index = 0;
+        RefPtr<JSString::Rope> rope = JSString::Rope::createOrNull(ropeLength);
+        if (UNLIKELY(!rope))
+            return throwOutOfMemoryError(exec);
+        rope->append(index, s1);
+        rope->append(index, s2);
+        ASSERT(index == ropeLength);
+        return new (globalData) JSString(globalData, rope.release());
+    }
+
+    ALWAYS_INLINE JSValue jsString(ExecState* exec, const UString& u1, JSString* s2)
+    {
+        unsigned ropeLength = 1 + s2->ropeLength();
+        JSGlobalData* globalData = &exec->globalData();
+
+        if (ropeLength <= JSString::s_maxInternalRopeLength)
+            return new (globalData) JSString(globalData, ropeLength, u1, s2);
+
+        unsigned index = 0;
+        RefPtr<JSString::Rope> rope = JSString::Rope::createOrNull(ropeLength);
+        if (UNLIKELY(!rope))
+            return throwOutOfMemoryError(exec);
+        rope->append(index, u1);
+        rope->append(index, s2);
+        ASSERT(index == ropeLength);
+        return new (globalData) JSString(globalData, rope.release());
+    }
+
+    ALWAYS_INLINE JSValue jsString(ExecState* exec, JSString* s1, const UString& u2)
+    {
+        unsigned ropeLength = s1->ropeLength() + 1;
+        JSGlobalData* globalData = &exec->globalData();
+
+        if (ropeLength <= JSString::s_maxInternalRopeLength)
+            return new (globalData) JSString(globalData, ropeLength, s1, u2);
+
+        unsigned index = 0;
+        RefPtr<JSString::Rope> rope = JSString::Rope::createOrNull(ropeLength);
+        if (UNLIKELY(!rope))
+            return throwOutOfMemoryError(exec);
+        rope->append(index, s1);
+        rope->append(index, u2);
+        ASSERT(index == ropeLength);
+        return new (globalData) JSString(globalData, rope.release());
+    }
+
+    ALWAYS_INLINE JSValue jsString(ExecState* exec, Register* strings, unsigned count)
+    {
+        ASSERT(count >= 3);
+
+        unsigned ropeLength = 0;
+        for (unsigned i = 0; i < count; ++i) {
+            JSValue v = strings[i].jsValue();
+            if (LIKELY(v.isString()))
+                ropeLength += asString(v)->ropeLength();
+            else
+                ++ropeLength;
+        }
+
+        JSGlobalData* globalData = &exec->globalData();
+        if (ropeLength == 3)
+            return new (globalData) JSString(exec, strings[0].jsValue(), strings[1].jsValue(), strings[2].jsValue());
+
+        RefPtr<JSString::Rope> rope = JSString::Rope::createOrNull(ropeLength);
+        if (UNLIKELY(!rope))
+            return throwOutOfMemoryError(exec);
+
+        unsigned index = 0;
+        for (unsigned i = 0; i < count; ++i) {
+            JSValue v = strings[i].jsValue();
+            if (LIKELY(v.isString()))
+                rope->append(index, asString(v));
+            else
+                rope->append(index, v.toString(exec));
+        }
+
+        ASSERT(index == ropeLength);
+        return new (globalData) JSString(globalData, rope.release());
+    }
+
+    ALWAYS_INLINE JSValue jsString(ExecState* exec, JSValue thisValue, const ArgList& args)
+    {
+        unsigned ropeLength = 0;
+        if (LIKELY(thisValue.isString()))
+            ropeLength += asString(thisValue)->ropeLength();
+        else
+            ++ropeLength;
+        for (unsigned i = 0; i < args.size(); ++i) {
+            JSValue v = args.at(i);
+            if (LIKELY(v.isString()))
+                ropeLength += asString(v)->ropeLength();
+            else
+                ++ropeLength;
+        }
+
+        RefPtr<JSString::Rope> rope = JSString::Rope::createOrNull(ropeLength);
+        if (UNLIKELY(!rope))
+            return throwOutOfMemoryError(exec);
+
+        unsigned index = 0;
+        if (LIKELY(thisValue.isString()))
+            rope->append(index, asString(thisValue));
+        else
+            rope->append(index, thisValue.toString(exec));
+        for (unsigned i = 0; i < args.size(); ++i) {
+            JSValue v = args.at(i);
+            if (LIKELY(v.isString()))
+                rope->append(index, asString(v));
+            else
+                rope->append(index, v.toString(exec));
+        }
+        ASSERT(index == ropeLength);
+
+        JSGlobalData* globalData = &exec->globalData();
+        return new (globalData) JSString(globalData, rope.release());
+    }
+
     // ECMA 11.9.3
     inline bool JSValue::equal(ExecState* exec, JSValue v1, JSValue v2)
     {
@@ -53,7 +183,7 @@ namespace JSC {
             bool s1 = v1.isString();
             bool s2 = v2.isString();
             if (s1 && s2)
-                return asString(v1)->value() == asString(v2)->value();
+                return asString(v1)->value(exec) == asString(v2)->value(exec);
 
             if (v1.isUndefinedOrNull()) {
                 if (v2.isUndefinedOrNull())
@@ -70,13 +200,12 @@ namespace JSC {
             }
 
             if (v1.isObject()) {
-                if (v2.isObject()) {
+                if (v2.isObject())
                     return v1 == v2
 #ifdef QT_BUILD_SCRIPT_LIB
                         || asObject(v1)->compareToObject(exec, asObject(v2))
 #endif
                         ;
-                }
                 JSValue p1 = v1.toPrimitive(exec);
                 if (exec->hadException())
                     return false;
@@ -115,17 +244,17 @@ namespace JSC {
     }
 
     // ECMA 11.9.3
-    ALWAYS_INLINE bool JSValue::strictEqualSlowCaseInline(JSValue v1, JSValue v2)
+    ALWAYS_INLINE bool JSValue::strictEqualSlowCaseInline(ExecState* exec, JSValue v1, JSValue v2)
     {
         ASSERT(v1.isCell() && v2.isCell());
 
         if (v1.asCell()->isString() && v2.asCell()->isString())
-            return asString(v1)->value() == asString(v2)->value();
+            return asString(v1)->value(exec) == asString(v2)->value(exec);
 
         return v1 == v2;
     }
 
-    inline bool JSValue::strictEqual(JSValue v1, JSValue v2)
+    inline bool JSValue::strictEqual(ExecState* exec, JSValue v1, JSValue v2)
     {
         if (v1.isInt32() && v2.isInt32())
             return v1 == v2;
@@ -136,10 +265,10 @@ namespace JSC {
         if (!v1.isCell() || !v2.isCell())
             return v1 == v2;
 
-        return strictEqualSlowCaseInline(v1, v2);
+        return strictEqualSlowCaseInline(exec, v1, v2);
     }
 
-    inline bool jsLess(CallFrame* callFrame, JSValue v1, JSValue v2)
+    ALWAYS_INLINE bool jsLess(CallFrame* callFrame, JSValue v1, JSValue v2)
     {
         if (v1.isInt32() && v2.isInt32())
             return v1.asInt32() < v2.asInt32();
@@ -151,7 +280,7 @@ namespace JSC {
 
         JSGlobalData* globalData = &callFrame->globalData();
         if (isJSString(globalData, v1) && isJSString(globalData, v2))
-            return asString(v1)->value() < asString(v2)->value();
+            return asString(v1)->value(callFrame) < asString(v2)->value(callFrame);
 
         JSValue p1;
         JSValue p2;
@@ -161,7 +290,7 @@ namespace JSC {
         if (wasNotString1 | wasNotString2)
             return n1 < n2;
 
-        return asString(p1)->value() < asString(p2)->value();
+        return asString(p1)->value(callFrame) < asString(p2)->value(callFrame);
     }
 
     inline bool jsLessEq(CallFrame* callFrame, JSValue v1, JSValue v2)
@@ -176,7 +305,7 @@ namespace JSC {
 
         JSGlobalData* globalData = &callFrame->globalData();
         if (isJSString(globalData, v1) && isJSString(globalData, v2))
-            return !(asString(v2)->value() < asString(v1)->value());
+            return !(asString(v2)->value(callFrame) < asString(v1)->value(callFrame));
 
         JSValue p1;
         JSValue p2;
@@ -186,7 +315,7 @@ namespace JSC {
         if (wasNotString1 | wasNotString2)
             return n1 <= n2;
 
-        return !(asString(p2)->value() < asString(p1)->value());
+        return !(asString(p2)->value(callFrame) < asString(p1)->value(callFrame));
     }
 
     // Fast-path choices here are based on frequency data from SunSpider:
@@ -200,44 +329,29 @@ namespace JSC {
 
     ALWAYS_INLINE JSValue jsAdd(CallFrame* callFrame, JSValue v1, JSValue v2)
     {
-        double left;
-        double right = 0.0;
-
-        bool rightIsNumber = v2.getNumber(right);
-        if (rightIsNumber && v1.getNumber(left))
+        double left = 0.0, right;
+        if (v1.getNumber(left) && v2.getNumber(right))
             return jsNumber(callFrame, left + right);
         
-        bool leftIsString = v1.isString();
-        if (leftIsString && v2.isString()) {
-            RefPtr<UString::Rep> value = concatenate(asString(v1)->value().rep(), asString(v2)->value().rep());
-            if (!value)
-                return throwOutOfMemoryError(callFrame);
-            return jsString(callFrame, value.release());
-        }
-
-        if (rightIsNumber & leftIsString) {
-            RefPtr<UString::Rep> value = v2.isInt32() ?
-                concatenate(asString(v1)->value().rep(), v2.asInt32()) :
-                concatenate(asString(v1)->value().rep(), right);
-
-            if (!value)
-                return throwOutOfMemoryError(callFrame);
-            return jsString(callFrame, value.release());
+        if (v1.isString()) {
+            return v2.isString()
+                ? jsString(callFrame, asString(v1), asString(v2))
+                : jsString(callFrame, asString(v1), v2.toPrimitiveString(callFrame));
         }
 
         // All other cases are pretty uncommon
         return jsAddSlowCase(callFrame, v1, v2);
     }
 
-    inline size_t countPrototypeChainEntriesAndCheckForProxies(CallFrame* callFrame, JSValue baseValue, const PropertySlot& slot)
+    inline size_t normalizePrototypeChain(CallFrame* callFrame, JSValue base, JSValue slotBase, const Identifier& propertyName, size_t& slotOffset)
     {
-        JSCell* cell = asCell(baseValue);
+        JSCell* cell = asCell(base);
         size_t count = 0;
 
-        while (slot.slotBase() != cell) {
+        while (slotBase != cell) {
             JSValue v = cell->structure()->prototypeForLookup(callFrame);
 
-            // If we didn't find slotBase in baseValue's prototype chain, then baseValue
+            // If we didn't find slotBase in base's prototype chain, then base
             // must be a proxy for another object.
 
             if (v.isNull())
@@ -247,8 +361,11 @@ namespace JSC {
 
             // Since we're accessing a prototype in a loop, it's a good bet that it
             // should not be treated as a dictionary.
-            if (cell->structure()->isDictionary())
-                asObject(cell)->setStructure(Structure::fromDictionaryTransition(cell->structure()));
+            if (cell->structure()->isDictionary()) {
+                asObject(cell)->flattenDictionaryObject();
+                if (slotBase == cell)
+                    slotOffset = cell->structure()->get(propertyName); 
+            }
 
             ++count;
         }
@@ -257,6 +374,25 @@ namespace JSC {
         return count;
     }
 
+    inline size_t normalizePrototypeChain(CallFrame* callFrame, JSCell* base)
+    {
+        size_t count = 0;
+        while (1) {
+            JSValue v = base->structure()->prototypeForLookup(callFrame);
+            if (v.isNull())
+                return count;
+
+            base = asCell(v);
+
+            // Since we're accessing a prototype in a loop, it's a good bet that it
+            // should not be treated as a dictionary.
+            if (base->structure()->isDictionary())
+                asObject(base)->flattenDictionaryObject();
+
+            ++count;
+        }
+    }
+
     ALWAYS_INLINE JSValue resolveBase(CallFrame* callFrame, Identifier& property, ScopeChainNode* scopeChain)
     {
         ScopeChainIterator iter = scopeChain->begin();
@@ -279,52 +415,6 @@ namespace JSC {
         ASSERT_NOT_REACHED();
         return JSValue();
     }
-
-    ALWAYS_INLINE JSValue concatenateStrings(CallFrame* callFrame, Register* strings, unsigned count)
-    {
-        ASSERT(count >= 3);
-
-        // Estimate the amount of space required to hold the entire string.  If all
-        // arguments are strings, we can easily calculate the exact amount of space
-        // required.  For any other arguments, for now let's assume they may require
-        // 11 UChars of storage.  This is enouch to hold any int, and likely is also
-        // reasonable for the other immediates.  We may want to come back and tune
-        // this value at some point.
-        unsigned bufferSize = 0;
-        for (unsigned i = 0; i < count; ++i) {
-            JSValue v = strings[i].jsValue();
-            if (LIKELY(v.isString()))
-                bufferSize += asString(v)->value().size();
-            else
-                bufferSize += 11;
-        }
-
-        // Allocate an output string to store the result.
-        // If the first argument is a String, and if it has the capacity (or can grow
-        // its capacity) to hold the entire result then use this as a base to concatenate
-        // onto.  Otherwise, allocate a new empty output buffer.
-        JSValue firstValue = strings[0].jsValue();
-        RefPtr<UString::Rep> resultRep;
-        if (firstValue.isString() && (resultRep = asString(firstValue)->value().rep())->reserveCapacity(bufferSize)) {
-            // We're going to concatenate onto the first string - remove it from the list of items to be appended.
-            ++strings;
-            --count;
-        } else
-            resultRep = UString::Rep::createEmptyBuffer(bufferSize);
-        UString result(resultRep);
-
-        // Loop over the operands, writing them into the output buffer.
-        for (unsigned i = 0; i < count; ++i) {
-            JSValue v = strings[i].jsValue();
-            if (LIKELY(v.isString()))
-                result.append(asString(v)->value());
-            else
-                result.append(v.toString(callFrame));
-        }
-
-        return jsString(callFrame, result);
-    }
-
 } // namespace JSC
 
 #endif // Operations_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.cpp
index 4db814f..558ae28 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.cpp
@@ -153,15 +153,15 @@ void PropertyDescriptor::setGetter(JSValue getter)
     m_attributes &= ~ReadOnly;
 }
 
-bool PropertyDescriptor::equalTo(const PropertyDescriptor& other) const
+bool PropertyDescriptor::equalTo(ExecState* exec, const PropertyDescriptor& other) const
 {
     if (!other.m_value == m_value ||
         !other.m_getter == m_getter ||
         !other.m_setter == m_setter)
         return false;
-    return (!m_value || JSValue::strictEqual(other.m_value, m_value)) && 
-           (!m_getter || JSValue::strictEqual(other.m_getter, m_getter)) && 
-           (!m_setter || JSValue::strictEqual(other.m_setter, m_setter)) &&
+    return (!m_value || JSValue::strictEqual(exec, other.m_value, m_value)) && 
+           (!m_getter || JSValue::strictEqual(exec, other.m_getter, m_getter)) && 
+           (!m_setter || JSValue::strictEqual(exec, other.m_setter, m_setter)) &&
            attributesEqual(other);
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.h
index 40bec86..ff9f160 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyDescriptor.h
@@ -61,7 +61,7 @@ namespace JSC {
         bool configurablePresent() const { return m_seenAttributes & ConfigurablePresent; }
         bool setterPresent() const { return m_setter; }
         bool getterPresent() const { return m_getter; }
-        bool equalTo(const PropertyDescriptor& other) const;
+        bool equalTo(ExecState* exec, const PropertyDescriptor& other) const;
         bool attributesEqual(const PropertyDescriptor& other) const;
         unsigned attributesWithOverride(const PropertyDescriptor& other) const;
     private:
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.cpp
index 0878e73..5108272 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.cpp
@@ -21,13 +21,16 @@
 #include "config.h"
 #include "PropertyNameArray.h"
 
+#include "Structure.h"
+#include "StructureChain.h"
+
 namespace JSC {
 
 static const size_t setThreshold = 20;
 
 void PropertyNameArray::add(UString::Rep* identifier)
 {
-    ASSERT(identifier == &UString::Rep::null() || identifier == &UString::Rep::empty() || identifier->identifierTable());
+    ASSERT(identifier == &UString::Rep::null() || identifier == &UString::Rep::empty() || identifier->isIdentifier());
 
     size_t size = m_data->propertyNameVector().size();
     if (size < setThreshold) {
@@ -44,7 +47,7 @@ void PropertyNameArray::add(UString::Rep* identifier)
             return;
     }
 
-    m_data->propertyNameVector().append(Identifier(m_globalData, identifier));
+    addKnownUnique(identifier);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.h
index 67ee9c8..3dbcc9d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PropertyNameArray.h
@@ -23,46 +23,35 @@
 
 #include "CallFrame.h"
 #include "Identifier.h"
-#include "Structure.h"
-#include "StructureChain.h"
 #include <wtf/HashSet.h>
+#include <wtf/OwnArrayPtr.h>
 #include <wtf/Vector.h>
 
 namespace JSC {
+    
+    class Structure;
+    class StructureChain;
 
+    // FIXME: Rename to PropertyNameArray.
     class PropertyNameArrayData : public RefCounted<PropertyNameArrayData> {
     public:
         typedef Vector<Identifier, 20> PropertyNameVector;
-        typedef PropertyNameVector::const_iterator const_iterator;
 
         static PassRefPtr<PropertyNameArrayData> create() { return adoptRef(new PropertyNameArrayData); }
 
-        const_iterator begin() const { return m_propertyNameVector.begin(); }
-        const_iterator end() const { return m_propertyNameVector.end(); }
-
         PropertyNameVector& propertyNameVector() { return m_propertyNameVector; }
 
-        void setCachedStructure(Structure* structure) { m_cachedStructure = structure; }
-        Structure* cachedStructure() const { return m_cachedStructure; }
-
-        void setCachedPrototypeChain(PassRefPtr<StructureChain> cachedPrototypeChain) { m_cachedPrototypeChain = cachedPrototypeChain; }
-        StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); }
-
     private:
         PropertyNameArrayData()
-            : m_cachedStructure(0)
         {
         }
 
         PropertyNameVector m_propertyNameVector;
-        Structure* m_cachedStructure;
-        RefPtr<StructureChain> m_cachedPrototypeChain;
     };
 
+    // FIXME: Rename to PropertyNameArrayBuilder.
     class PropertyNameArray {
     public:
-        typedef PropertyNameArrayData::const_iterator const_iterator;
-
         PropertyNameArray(JSGlobalData* globalData)
             : m_data(PropertyNameArrayData::create())
             , m_globalData(globalData)
@@ -83,21 +72,18 @@ namespace JSC {
         void add(UString::Rep*);
         void addKnownUnique(UString::Rep* identifier) { m_data->propertyNameVector().append(Identifier(m_globalData, identifier)); }
 
-        size_t size() const { return m_data->propertyNameVector().size(); }
-
         Identifier& operator[](unsigned i) { return m_data->propertyNameVector()[i]; }
         const Identifier& operator[](unsigned i) const { return m_data->propertyNameVector()[i]; }
 
-        const_iterator begin() const { return m_data->begin(); }
-        const_iterator end() const { return m_data->end(); }
-
         void setData(PassRefPtr<PropertyNameArrayData> data) { m_data = data; }
         PropertyNameArrayData* data() { return m_data.get(); }
-
         PassRefPtr<PropertyNameArrayData> releaseData() { return m_data.release(); }
 
-        void setShouldCache(bool shouldCache) { m_shouldCache = shouldCache; }
-        bool shouldCache() const { return m_shouldCache; }
+        // FIXME: Remove these functions.
+        typedef PropertyNameArrayData::PropertyNameVector::const_iterator const_iterator;
+        size_t size() const { return m_data->propertyNameVector().size(); }
+        const_iterator begin() const { return m_data->propertyNameVector().begin(); }
+        const_iterator end() const { return m_data->propertyNameVector().end(); }
 
     private:
         typedef HashSet<UString::Rep*, PtrHash<UString::Rep*> > IdentifierSet;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Protect.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Protect.h
index 6e7984c..c2d7f0c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Protect.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Protect.h
@@ -22,8 +22,8 @@
 #ifndef Protect_h
 #define Protect_h
 
-#include "JSCell.h"
 #include "Collector.h"
+#include "JSValue.h"
 
 namespace JSC {
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.cpp
index 8e3d107..38f8adb 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.cpp
@@ -40,7 +40,7 @@ PrototypeFunction::PrototypeFunction(ExecState* exec, int length, const Identifi
     putDirect(exec->propertyNames().length, jsNumber(exec, length), DontDelete | ReadOnly | DontEnum);
 }
 
-PrototypeFunction::PrototypeFunction(ExecState* exec, PassRefPtr<Structure> prototypeFunctionStructure, int length, const Identifier& name, NativeFunction function)
+PrototypeFunction::PrototypeFunction(ExecState* exec, NonNullPassRefPtr<Structure> prototypeFunctionStructure, int length, const Identifier& name, NativeFunction function)
     : InternalFunction(&exec->globalData(), prototypeFunctionStructure, name)
     , m_function(function)
 {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.h
index 99ab327..70ee034 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/PrototypeFunction.h
@@ -32,7 +32,7 @@ namespace JSC {
     class PrototypeFunction : public InternalFunction {
     public:
         PrototypeFunction(ExecState*, int length, const Identifier&, NativeFunction);
-        PrototypeFunction(ExecState*, PassRefPtr<Structure>, int length, const Identifier&, NativeFunction);
+        PrototypeFunction(ExecState*, NonNullPassRefPtr<Structure>, int length, const Identifier&, NativeFunction);
 
     private:
         virtual CallType getCallData(CallData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.cpp
index b366b58..430a5c0 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.cpp
@@ -65,7 +65,6 @@ inline RegExp::RegExp(JSGlobalData* globalData, const UString& pattern)
 
 inline RegExp::RegExp(JSGlobalData* globalData, const UString& pattern, const UString& flags)
     : m_pattern(pattern)
-    , m_flags(flags)
     , m_flagBits(0)
     , m_constructionError(0)
     , m_numSubpatterns(0)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.h
index 24d4199..61ab0bc 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExp.h
@@ -49,7 +49,6 @@ namespace JSC {
         bool multiline() const { return m_flagBits & Multiline; }
 
         const UString& pattern() const { return m_pattern; }
-        const UString& flags() const { return m_flags; }
 
         bool isValid() const { return !m_constructionError; }
         const char* errorMessage() const { return m_constructionError; }
@@ -66,7 +65,6 @@ namespace JSC {
         enum FlagBits { Global = 1, IgnoreCase = 2, Multiline = 4 };
 
         UString m_pattern; // FIXME: Just decompile m_regExp instead of storing this.
-        UString m_flags; // FIXME: Just decompile m_regExp instead of storing this.
         int m_flagBits;
         const char* m_constructionError;
         unsigned m_numSubpatterns;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.cpp
index 1c95175..6f00142 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.cpp
@@ -90,29 +90,7 @@ const ClassInfo RegExpConstructor::info = { "Function", &InternalFunction::info,
 @end
 */
 
-struct RegExpConstructorPrivate : FastAllocBase {
-    // Global search cache / settings
-    RegExpConstructorPrivate()
-        : lastNumSubPatterns(0)
-        , multiline(false)
-        , lastOvectorIndex(0)
-    {
-    }
-
-    const Vector<int, 32>& lastOvector() const { return ovector[lastOvectorIndex]; }
-    Vector<int, 32>& lastOvector() { return ovector[lastOvectorIndex]; }
-    Vector<int, 32>& tempOvector() { return ovector[lastOvectorIndex ? 0 : 1]; }
-    void changeLastOvector() { lastOvectorIndex = lastOvectorIndex ? 0 : 1; }
-
-    UString input;
-    UString lastInput;
-    Vector<int, 32> ovector[2];
-    unsigned lastNumSubPatterns : 30;
-    bool multiline : 1;
-    unsigned lastOvectorIndex : 1;
-};
-
-RegExpConstructor::RegExpConstructor(ExecState* exec, PassRefPtr<Structure> structure, RegExpPrototype* regExpPrototype)
+RegExpConstructor::RegExpConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, RegExpPrototype* regExpPrototype)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, "RegExp"))
     , d(new RegExpConstructorPrivate)
 {
@@ -123,30 +101,6 @@ RegExpConstructor::RegExpConstructor(ExecState* exec, PassRefPtr<Structure> stru
     putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 2), ReadOnly | DontDelete | DontEnum);
 }
 
-/* 
-  To facilitate result caching, exec(), test(), match(), search(), and replace() dipatch regular
-  expression matching through the performMatch function. We use cached results to calculate, 
-  e.g., RegExp.lastMatch and RegExp.leftParen.
-*/
-void RegExpConstructor::performMatch(RegExp* r, const UString& s, int startOffset, int& position, int& length, int** ovector)
-{
-    position = r->match(s, startOffset, &d->tempOvector());
-
-    if (ovector)
-        *ovector = d->tempOvector().data();
-
-    if (position != -1) {
-        ASSERT(!d->tempOvector().isEmpty());
-
-        length = d->tempOvector()[1] - d->tempOvector()[0];
-
-        d->input = s;
-        d->lastInput = s;
-        d->changeLastOvector();
-        d->lastNumSubPatterns = r->numSubpatterns();
-    }
-}
-
 RegExpMatchesArray::RegExpMatchesArray(ExecState* exec, RegExpConstructorPrivate* data)
     : JSArray(exec->lexicalGlobalObject()->regExpMatchesArrayStructure(), data->lastNumSubPatterns + 1)
 {
@@ -178,6 +132,8 @@ void RegExpMatchesArray::fillArrayInstance(ExecState* exec)
         int start = d->lastOvector()[2 * i];
         if (start >= 0)
             JSArray::put(exec, i, jsSubstring(exec, d->lastInput, start, d->lastOvector()[2 * i + 1] - start));
+        else
+            JSArray::put(exec, i, jsUndefined());
     }
 
     PutPropertySlot slot;
@@ -346,7 +302,7 @@ JSObject* constructRegExp(ExecState* exec, const ArgList& args)
 
     RefPtr<RegExp> regExp = RegExp::create(&exec->globalData(), pattern, flags);
     if (!regExp->isValid())
-        return throwError(exec, SyntaxError, UString("Invalid regular expression: ").append(regExp->errorMessage()));
+        return throwError(exec, SyntaxError, makeString("Invalid regular expression: ", regExp->errorMessage()));
     return new (exec) RegExpObject(exec->lexicalGlobalObject()->regExpStructure(), regExp.release());
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.h
index 4b06b51..f9ca9cf 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpConstructor.h
@@ -22,6 +22,7 @@
 #define RegExpConstructor_h
 
 #include "InternalFunction.h"
+#include "RegExp.h"
 #include <wtf/OwnPtr.h>
 
 namespace JSC {
@@ -30,13 +31,35 @@ namespace JSC {
     class RegExpPrototype;
     struct RegExpConstructorPrivate;
 
+    struct RegExpConstructorPrivate : FastAllocBase {
+        // Global search cache / settings
+        RegExpConstructorPrivate()
+            : lastNumSubPatterns(0)
+            , multiline(false)
+            , lastOvectorIndex(0)
+        {
+        }
+
+        const Vector<int, 32>& lastOvector() const { return ovector[lastOvectorIndex]; }
+        Vector<int, 32>& lastOvector() { return ovector[lastOvectorIndex]; }
+        Vector<int, 32>& tempOvector() { return ovector[lastOvectorIndex ? 0 : 1]; }
+        void changeLastOvector() { lastOvectorIndex = lastOvectorIndex ? 0 : 1; }
+
+        UString input;
+        UString lastInput;
+        Vector<int, 32> ovector[2];
+        unsigned lastNumSubPatterns : 30;
+        bool multiline : 1;
+        unsigned lastOvectorIndex : 1;
+    };
+
     class RegExpConstructor : public InternalFunction {
     public:
-        RegExpConstructor(ExecState*, PassRefPtr<Structure>, RegExpPrototype*);
+        RegExpConstructor(ExecState*, NonNullPassRefPtr<Structure>, RegExpPrototype*);
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, ImplementsHasInstance | HasDefaultMark | HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
         virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
@@ -59,6 +82,9 @@ namespace JSC {
         JSValue getLeftContext(ExecState*) const;
         JSValue getRightContext(ExecState*) const;
 
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | InternalFunction::StructureFlags;
+
     private:
         virtual ConstructType getConstructData(ConstructData&);
         virtual CallType getCallData(CallData&);
@@ -78,6 +104,30 @@ namespace JSC {
         return static_cast<RegExpConstructor*>(asObject(value));
     }
 
+    /* 
+      To facilitate result caching, exec(), test(), match(), search(), and replace() dipatch regular
+      expression matching through the performMatch function. We use cached results to calculate, 
+      e.g., RegExp.lastMatch and RegExp.leftParen.
+    */
+    inline void RegExpConstructor::performMatch(RegExp* r, const UString& s, int startOffset, int& position, int& length, int** ovector)
+    {
+        position = r->match(s, startOffset, &d->tempOvector());
+
+        if (ovector)
+            *ovector = d->tempOvector().data();
+
+        if (position != -1) {
+            ASSERT(!d->tempOvector().isEmpty());
+
+            length = d->tempOvector()[1] - d->tempOvector()[0];
+
+            d->input = s;
+            d->lastInput = s;
+            d->changeLastOvector();
+            d->lastNumSubPatterns = r->numSubpatterns();
+        }
+    }
+
 } // namespace JSC
 
 #endif // RegExpConstructor_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpMatchesArray.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpMatchesArray.h
index c1a5a25..38d3cb4 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpMatchesArray.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpMatchesArray.h
@@ -65,25 +65,25 @@ namespace JSC {
             JSArray::put(exec, propertyName, v);
         }
 
-        virtual bool deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete = true)
+        virtual bool deleteProperty(ExecState* exec, const Identifier& propertyName)
         {
             if (lazyCreationData())
                 fillArrayInstance(exec);
-            return JSArray::deleteProperty(exec, propertyName, checkDontDelete);
+            return JSArray::deleteProperty(exec, propertyName);
         }
 
-        virtual bool deleteProperty(ExecState* exec, unsigned propertyName, bool checkDontDelete = true)
+        virtual bool deleteProperty(ExecState* exec, unsigned propertyName)
         {
             if (lazyCreationData())
                 fillArrayInstance(exec);
-            return JSArray::deleteProperty(exec, propertyName, checkDontDelete);
+            return JSArray::deleteProperty(exec, propertyName);
         }
 
-        virtual void getOwnPropertyNames(ExecState* exec, PropertyNameArray& arr, bool includeNonEnumerable = false)
+        virtual void getOwnPropertyNames(ExecState* exec, PropertyNameArray& arr, EnumerationMode mode = ExcludeDontEnumProperties)
         {
             if (lazyCreationData())
                 fillArrayInstance(exec);
-            JSArray::getOwnPropertyNames(exec, arr, includeNonEnumerable);
+            JSArray::getOwnPropertyNames(exec, arr, mode);
         }
 
         void fillArrayInstance(ExecState*);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.cpp
index 9d9dd7d..42bfcef 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.cpp
@@ -57,7 +57,7 @@ const ClassInfo RegExpObject::info = { "RegExp", 0, 0, ExecState::regExpTable };
 @end
 */
 
-RegExpObject::RegExpObject(PassRefPtr<Structure> structure, PassRefPtr<RegExp> regExp)
+RegExpObject::RegExpObject(NonNullPassRefPtr<Structure> structure, NonNullPassRefPtr<RegExp> regExp)
     : JSObject(structure)
     , d(new RegExpObjectData(regExp, 0))
 {
@@ -142,7 +142,7 @@ bool RegExpObject::match(ExecState* exec, const ArgList& args)
 
     UString input = args.isEmpty() ? regExpConstructor->input() : args.at(0).toString(exec);
     if (input.isNull()) {
-        throwError(exec, GeneralError, "No input to " + toString(exec) + ".");
+        throwError(exec, GeneralError, makeString("No input to ", toString(exec), "."));
         return false;
     }
 
@@ -159,7 +159,7 @@ bool RegExpObject::match(ExecState* exec, const ArgList& args)
     }
 
     int position;
-    int length;
+    int length = 0;
     regExpConstructor->performMatch(d->regExp.get(), input, static_cast<int>(d->lastIndex), position, length);
     if (position < 0) {
         d->lastIndex = 0;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.h
index 67113b6..3117c86 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpObject.h
@@ -28,7 +28,7 @@ namespace JSC {
 
     class RegExpObject : public JSObject {
     public:
-        RegExpObject(PassRefPtr<Structure>, PassRefPtr<RegExp>);
+        RegExpObject(NonNullPassRefPtr<Structure>, NonNullPassRefPtr<RegExp>);
         virtual ~RegExpObject();
 
         void setRegExp(PassRefPtr<RegExp> r) { d->regExp = r; }
@@ -49,16 +49,19 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType, HasDefaultMark | HasDefaultGetPropertyNames));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | JSObject::StructureFlags;
+
     private:
         bool match(ExecState*, const ArgList&);
 
         virtual CallType getCallData(CallData&);
 
         struct RegExpObjectData : FastAllocBase {
-            RegExpObjectData(PassRefPtr<RegExp> regExp, double lastIndex)
+            RegExpObjectData(NonNullPassRefPtr<RegExp> regExp, double lastIndex)
                 : regExp(regExp)
                 , lastIndex(lastIndex)
             {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.cpp
index 4714171..5f9d357 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.cpp
@@ -46,7 +46,7 @@ static JSValue JSC_HOST_CALL regExpProtoFuncToString(ExecState*, JSObject*, JSVa
 
 const ClassInfo RegExpPrototype::info = { "RegExpPrototype", 0, 0, 0 };
 
-RegExpPrototype::RegExpPrototype(ExecState* exec, PassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
+RegExpPrototype::RegExpPrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure)
     : JSObject(structure)
 {
     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 0, exec->propertyNames().compile, regExpProtoFuncCompile), DontEnum);
@@ -91,7 +91,7 @@ JSValue JSC_HOST_CALL regExpProtoFuncCompile(ExecState* exec, JSObject*, JSValue
     }
 
     if (!regExp->isValid())
-        return throwError(exec, SyntaxError, UString("Invalid regular expression: ").append(regExp->errorMessage()));
+        return throwError(exec, SyntaxError, makeString("Invalid regular expression: ", regExp->errorMessage()));
 
     asRegExpObject(thisValue)->setRegExp(regExp.release());
     asRegExpObject(thisValue)->setLastIndex(0);
@@ -106,19 +106,17 @@ JSValue JSC_HOST_CALL regExpProtoFuncToString(ExecState* exec, JSObject*, JSValu
         return throwError(exec, TypeError);
     }
 
-    UString result = "/" + asRegExpObject(thisValue)->get(exec, exec->propertyNames().source).toString(exec);
-#ifdef QT_BUILD_SCRIPT_LIB
-    if (result.size() == 1)
-        result.append("(?:)");
-#endif
-    result.append('/');
+    char postfix[5] = { '/', 0, 0, 0, 0 };
+    int index = 1;
     if (asRegExpObject(thisValue)->get(exec, exec->propertyNames().global).toBoolean(exec))
-        result.append('g');
+        postfix[index++] = 'g';
     if (asRegExpObject(thisValue)->get(exec, exec->propertyNames().ignoreCase).toBoolean(exec))
-        result.append('i');
+        postfix[index++] = 'i';
     if (asRegExpObject(thisValue)->get(exec, exec->propertyNames().multiline).toBoolean(exec))
-        result.append('m');
-    return jsNontrivialString(exec, result);
+        postfix[index] = 'm';
+    UString source = asRegExpObject(thisValue)->get(exec, exec->propertyNames().source).toString(exec);
+    // If source is empty, use "/(?:)/" to avoid colliding with comment syntax
+    return jsNontrivialString(exec, makeString("/", source.size() ? source : UString("(?:)"), postfix));
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.h
index f5db720..d3979bd 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/RegExpPrototype.h
@@ -27,7 +27,7 @@ namespace JSC {
 
     class RegExpPrototype : public JSObject {
     public:
-        RegExpPrototype(ExecState*, PassRefPtr<Structure>, Structure* prototypeFunctionStructure);
+        RegExpPrototype(ExecState*, NonNullPassRefPtr<Structure>, Structure* prototypeFunctionStructure);
 
         virtual const ClassInfo* classInfo() const { return &info; }
         static const ClassInfo info;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.cpp
index 960c525..981794b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.cpp
@@ -36,8 +36,8 @@ void ScopeChainNode::print() const
     ScopeChainIterator scopeEnd = end();
     for (ScopeChainIterator scopeIter = begin(); scopeIter != scopeEnd; ++scopeIter) {
         JSObject* o = *scopeIter;
-        PropertyNameArray propertyNames(globalObject()->globalExec());
-        o->getPropertyNames(globalObject()->globalExec(), propertyNames);
+        PropertyNameArray propertyNames(globalObject->globalExec());
+        o->getPropertyNames(globalObject->globalExec(), propertyNames);
         PropertyNameArray::const_iterator propEnd = propertyNames.end();
 
         fprintf(stderr, "----- [scope %p] -----\n", o);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.h
index c5e16c9..0b15b67 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/ScopeChain.h
@@ -33,14 +33,16 @@ namespace JSC {
     
     class ScopeChainNode : public FastAllocBase {
     public:
-        ScopeChainNode(ScopeChainNode* next, JSObject* object, JSGlobalData* globalData, JSObject* globalThis)
+        ScopeChainNode(ScopeChainNode* next, JSObject* object, JSGlobalData* globalData, JSGlobalObject* globalObject, JSObject* globalThis)
             : next(next)
             , object(object)
             , globalData(globalData)
+            , globalObject(globalObject)
             , globalThis(globalThis)
             , refCount(1)
         {
             ASSERT(globalData);
+            ASSERT(globalObject);
         }
 #ifndef NDEBUG
         // Due to the number of subtle and timing dependent bugs that have occurred due
@@ -51,6 +53,7 @@ namespace JSC {
             next = 0;
             object = 0;
             globalData = 0;
+            globalObject = 0;
             globalThis = 0;
         }
 #endif
@@ -58,6 +61,7 @@ namespace JSC {
         ScopeChainNode* next;
         JSObject* object;
         JSGlobalData* globalData;
+        JSGlobalObject* globalObject;
         JSObject* globalThis;
         int refCount;
 
@@ -82,9 +86,6 @@ namespace JSC {
         ScopeChainIterator begin() const;
         ScopeChainIterator end() const;
 
-        JSGlobalObject* globalObject() const; // defined in JSGlobalObject.h
-        JSObject* globalThisObject() const { return globalThis; }
-
 #ifndef NDEBUG        
         void print() const;
 #endif
@@ -93,7 +94,7 @@ namespace JSC {
     inline ScopeChainNode* ScopeChainNode::push(JSObject* o)
     {
         ASSERT(o);
-        return new ScopeChainNode(this, o, globalData, globalThis);
+        return new ScopeChainNode(this, o, globalData, globalObject, globalThis);
     }
 
     inline ScopeChainNode* ScopeChainNode::pop()
@@ -163,8 +164,8 @@ namespace JSC {
         {
         }
 
-        ScopeChain(JSObject* o, JSGlobalData* globalData, JSObject* globalThis)
-            : m_node(new ScopeChainNode(0, o, globalData, globalThis))
+        ScopeChain(JSObject* o, JSGlobalData* globalData, JSGlobalObject* globalObject, JSObject* globalThis)
+            : m_node(new ScopeChainNode(0, o, globalData, globalObject, globalThis))
         {
         }
 
@@ -203,7 +204,7 @@ namespace JSC {
         void pop() { m_node = m_node->pop(); }
         void clear() { m_node->deref(); m_node = 0; }
         
-        JSGlobalObject* globalObject() const { return m_node->globalObject(); }
+        JSGlobalObject* globalObject() const { return m_node->globalObject; }
 
         void markAggregate(MarkStack&) const;
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/SmallStrings.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/SmallStrings.cpp
index 04701cb..ac71735 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/SmallStrings.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/SmallStrings.cpp
@@ -41,30 +41,16 @@ public:
     UString::Rep* rep(unsigned char character) { return &m_reps[character]; }
 
 private:
-    UChar m_characters[numCharactersToStore];
-    UString::BaseString m_base;
     UString::Rep m_reps[numCharactersToStore];
 };
 
 SmallStringsStorage::SmallStringsStorage()
-    : m_base(m_characters, numCharactersToStore)
 {
-    m_base.rc = numCharactersToStore + 1;
-    // make sure UString doesn't try to reuse the buffer by pretending we have one more character in it
-    m_base.usedCapacity = numCharactersToStore + 1;
-    m_base.capacity = numCharactersToStore + 1;
-    m_base.checkConsistency();
-
-    for (unsigned i = 0; i < numCharactersToStore; ++i)
-        m_characters[i] = i;
-
-    memset(&m_reps, 0, sizeof(m_reps));
+    UChar* characterBuffer = 0;
+    RefPtr<UStringImpl> baseString = UStringImpl::createUninitialized(numCharactersToStore, characterBuffer);
     for (unsigned i = 0; i < numCharactersToStore; ++i) {
-        m_reps[i].offset = i;
-        m_reps[i].len = 1;
-        m_reps[i].rc = 1;
-        m_reps[i].setBaseString(&m_base);
-        m_reps[i].checkConsistency();
+        characterBuffer[i] = i;
+        new (&m_reps[i]) UString::Rep(&characterBuffer[i], 1, PassRefPtr<UStringImpl>(baseString));
     }
 }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringBuilder.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringBuilder.h
new file mode 100644
index 0000000..8e18d37
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringBuilder.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef StringBuilder_h
+#define StringBuilder_h
+
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+class StringBuilder {
+public:
+    void append(const UChar u)
+    {
+        buffer.append(u);
+    }
+
+    void append(const char* str)
+    {
+        buffer.append(str, strlen(str));
+    }
+
+    void append(const char* str, size_t len)
+    {
+        buffer.reserveCapacity(buffer.size() + len);
+        for (size_t i = 0; i < len; i++)
+            buffer.append(static_cast<unsigned char>(str[i]));
+    }
+
+    void append(const UChar* str, size_t len)
+    {
+        buffer.append(str, len);
+    }
+
+    void append(const UString& str)
+    {
+        buffer.append(str.data(), str.size());
+    }
+
+    bool isEmpty() { return buffer.isEmpty(); }
+    void reserveCapacity(size_t newCapacity) { buffer.reserveCapacity(newCapacity); }
+    void resize(size_t size) { buffer.resize(size); }
+    size_t size() const { return buffer.size(); }
+
+    UChar operator[](size_t i) const { return buffer.at(i); }
+
+    UString release()
+    {
+        buffer.shrinkToFit();
+        return UString::adopt(buffer);
+    }
+
+private:
+    Vector<UChar, 64> buffer;
+};
+
+}
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.cpp
index 6380445..c7b62bf 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.cpp
@@ -30,12 +30,12 @@ namespace JSC {
 
 static NEVER_INLINE JSValue stringFromCharCodeSlowCase(ExecState* exec, const ArgList& args)
 {
-    UChar* buf = static_cast<UChar*>(fastMalloc(args.size() * sizeof(UChar)));
-    UChar* p = buf;
-    ArgList::const_iterator end = args.end();
-    for (ArgList::const_iterator it = args.begin(); it != end; ++it)
-        *p++ = static_cast<UChar>((*it).toUInt32(exec));
-    return jsString(exec, UString(buf, p - buf, false));
+    unsigned length = args.size();
+    UChar* buf;
+    PassRefPtr<UStringImpl> impl = UStringImpl::createUninitialized(length, buf);
+    for (unsigned i = 0; i < length; ++i)
+        buf[i] = static_cast<UChar>(args.at(i).toUInt32(exec));
+    return jsString(exec, impl);
 }
 
 static JSValue JSC_HOST_CALL stringFromCharCode(ExecState* exec, JSObject*, JSValue, const ArgList& args)
@@ -47,7 +47,7 @@ static JSValue JSC_HOST_CALL stringFromCharCode(ExecState* exec, JSObject*, JSVa
 
 ASSERT_CLASS_FITS_IN_CELL(StringConstructor);
 
-StringConstructor::StringConstructor(ExecState* exec, PassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, StringPrototype* stringPrototype)
+StringConstructor::StringConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, StringPrototype* stringPrototype)
     : InternalFunction(&exec->globalData(), structure, Identifier(exec, stringPrototype->classInfo()->className))
 {
     // ECMA 15.5.3.1 String.prototype
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.h
index 7d52c69..e511f7b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringConstructor.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class StringConstructor : public InternalFunction {
     public:
-        StringConstructor(ExecState*, PassRefPtr<Structure>, Structure* prototypeFunctionStructure, StringPrototype*);
+        StringConstructor(ExecState*, NonNullPassRefPtr<Structure>, Structure* prototypeFunctionStructure, StringPrototype*);
 
         virtual ConstructType getConstructData(ConstructData&);
         virtual CallType getCallData(CallData&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.cpp
index dd1ac5d..f8e0e87 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.cpp
@@ -29,19 +29,19 @@ ASSERT_CLASS_FITS_IN_CELL(StringObject);
 
 const ClassInfo StringObject::info = { "String", 0, 0, 0 };
 
-StringObject::StringObject(ExecState* exec, PassRefPtr<Structure> structure)
+StringObject::StringObject(ExecState* exec, NonNullPassRefPtr<Structure> structure)
     : JSWrapperObject(structure)
 {
     setInternalValue(jsEmptyString(exec));
 }
 
-StringObject::StringObject(PassRefPtr<Structure> structure, JSString* string)
+StringObject::StringObject(NonNullPassRefPtr<Structure> structure, JSString* string)
     : JSWrapperObject(structure)
 {
     setInternalValue(string);
 }
 
-StringObject::StringObject(ExecState* exec, PassRefPtr<Structure> structure, const UString& string)
+StringObject::StringObject(ExecState* exec, NonNullPassRefPtr<Structure> structure, const UString& string)
     : JSWrapperObject(structure)
 {
     setInternalValue(jsString(exec, string));
@@ -75,7 +75,7 @@ void StringObject::put(ExecState* exec, const Identifier& propertyName, JSValue
     JSObject::put(exec, propertyName, value, slot);
 }
 
-bool StringObject::deleteProperty(ExecState* exec, const Identifier& propertyName, bool checkDontDelete)
+bool StringObject::deleteProperty(ExecState* exec, const Identifier& propertyName)
 {
     if (propertyName == exec->propertyNames().length)
         return false;
@@ -83,15 +83,17 @@ bool StringObject::deleteProperty(ExecState* exec, const Identifier& propertyNam
     unsigned i = propertyName.toStrictUInt32(&isStrictUInt32);
     if (isStrictUInt32 && internalValue()->canGetIndex(i))
         return false;
-    return JSObject::deleteProperty(exec, propertyName, checkDontDelete);
+    return JSObject::deleteProperty(exec, propertyName);
 }
 
-void StringObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void StringObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
-    int size = internalValue()->value().size();
+    int size = internalValue()->length();
     for (int i = 0; i < size; ++i)
         propertyNames.add(Identifier(exec, UString::from(i)));
-    return JSObject::getOwnPropertyNames(exec, propertyNames);
+    if (mode == IncludeDontEnumProperties)
+        propertyNames.add(exec->propertyNames().length);
+    return JSObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.h
index 2f5927a..b720b90 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObject.h
@@ -28,8 +28,8 @@ namespace JSC {
 
     class StringObject : public JSWrapperObject {
     public:
-        StringObject(ExecState*, PassRefPtr<Structure>);
-        StringObject(ExecState*, PassRefPtr<Structure>, const UString&);
+        StringObject(ExecState*, NonNullPassRefPtr<Structure>);
+        StringObject(ExecState*, NonNullPassRefPtr<Structure>, const UString&);
 
         static StringObject* create(ExecState*, JSString*);
 
@@ -38,8 +38,8 @@ namespace JSC {
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
 
         virtual void put(ExecState* exec, const Identifier& propertyName, JSValue, PutPropertySlot&);
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName, bool checkDontDelete = true);
-        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, bool includeNonEnumerable = false);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
 
         virtual const ClassInfo* classInfo() const { return &info; }
         static const JS_EXPORTDATA ClassInfo info;
@@ -48,11 +48,12 @@ namespace JSC {
 
         static PassRefPtr<Structure> createStructure(JSValue prototype)
         {
-            return Structure::create(prototype, TypeInfo(ObjectType));
+            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
         }
 
     protected:
-        StringObject(PassRefPtr<Structure>, JSString*);
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSWrapperObject::StructureFlags;
+        StringObject(NonNullPassRefPtr<Structure>, JSString*);
   };
 
     StringObject* asStringObject(JSValue);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObjectThatMasqueradesAsUndefined.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObjectThatMasqueradesAsUndefined.h
index 1d2e03f..69e1939 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObjectThatMasqueradesAsUndefined.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringObjectThatMasqueradesAsUndefined.h
@@ -37,16 +37,18 @@ namespace JSC {
         }
 
     private:
-        StringObjectThatMasqueradesAsUndefined(ExecState* exec, PassRefPtr<Structure> structure, const UString& string)
+        StringObjectThatMasqueradesAsUndefined(ExecState* exec, NonNullPassRefPtr<Structure> structure, const UString& string)
             : StringObject(exec, structure, string)
         {
         }
 
         static PassRefPtr<Structure> createStructure(JSValue proto) 
         { 
-            return Structure::create(proto, TypeInfo(ObjectType, MasqueradesAsUndefined | HasDefaultMark)); 
+            return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); 
         }
 
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | MasqueradesAsUndefined | OverridesGetPropertyNames | StringObject::StructureFlags;
+
         virtual bool toBoolean(ExecState*) const { return false; }
     };
  
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.cpp
index c9a32b6..d002e07 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.cpp
@@ -25,9 +25,11 @@
 #include "CachedCall.h"
 #include "Error.h"
 #include "Executable.h"
+#include "JSGlobalObjectFunctions.h"
 #include "JSArray.h"
 #include "JSFunction.h"
 #include "ObjectPrototype.h"
+#include "Operations.h"
 #include "PropertyNameArray.h"
 #include "RegExpConstructor.h"
 #include "RegExpObject.h"
@@ -72,6 +74,10 @@ static JSValue JSC_HOST_CALL stringProtoFuncFontsize(ExecState*, JSObject*, JSVa
 static JSValue JSC_HOST_CALL stringProtoFuncAnchor(ExecState*, JSObject*, JSValue, const ArgList&);
 static JSValue JSC_HOST_CALL stringProtoFuncLink(ExecState*, JSObject*, JSValue, const ArgList&);
 
+static JSValue JSC_HOST_CALL stringProtoFuncTrim(ExecState*, JSObject*, JSValue, const ArgList&);
+static JSValue JSC_HOST_CALL stringProtoFuncTrimLeft(ExecState*, JSObject*, JSValue, const ArgList&);
+static JSValue JSC_HOST_CALL stringProtoFuncTrimRight(ExecState*, JSObject*, JSValue, const ArgList&);
+
 }
 
 #include "StringPrototype.lut.h"
@@ -117,11 +123,14 @@ const ClassInfo StringPrototype::info = { "String", &StringObject::info, 0, Exec
     fontsize              stringProtoFuncFontsize          DontEnum|Function       1
     anchor                stringProtoFuncAnchor            DontEnum|Function       1
     link                  stringProtoFuncLink              DontEnum|Function       1
+    trim                  stringProtoFuncTrim              DontEnum|Function       0
+    trimLeft              stringProtoFuncTrimLeft          DontEnum|Function       0
+    trimRight             stringProtoFuncTrimRight         DontEnum|Function       0
 @end
 */
 
 // ECMA 15.5.4
-StringPrototype::StringPrototype(ExecState* exec, PassRefPtr<Structure> structure)
+StringPrototype::StringPrototype(ExecState* exec, NonNullPassRefPtr<Structure> structure)
     : StringObject(exec, structure)
 {
     // The constructor will be added later, after StringConstructor has been built
@@ -140,12 +149,11 @@ bool StringPrototype::getOwnPropertyDescriptor(ExecState* exec, const Identifier
 
 // ------------------------------ Functions --------------------------
 
-static inline UString substituteBackreferences(const UString& replacement, const UString& source, const int* ovector, RegExp* reg)
+static NEVER_INLINE UString substituteBackreferencesSlow(const UString& replacement, const UString& source, const int* ovector, RegExp* reg, int i)
 {
-    UString substitutedReplacement;
+    Vector<UChar> substitutedReplacement;
     int offset = 0;
-    int i = -1;
-    while ((i = replacement.find('$', i + 1)) != -1) {
+    do {
         if (i + 1 == replacement.size())
             break;
 
@@ -197,15 +205,21 @@ static inline UString substituteBackreferences(const UString& replacement, const
         i += 1 + advance;
         offset = i + 1;
         substitutedReplacement.append(source.data() + backrefStart, backrefLength);
-    }
-
-    if (!offset)
-        return replacement;
+    } while ((i = replacement.find('$', i + 1)) != -1);
 
     if (replacement.size() - offset)
         substitutedReplacement.append(replacement.data() + offset, replacement.size() - offset);
 
-    return substitutedReplacement;
+    substitutedReplacement.shrinkToFit();
+    return UString::adopt(substitutedReplacement);
+}
+
+static inline UString substituteBackreferences(const UString& replacement, const UString& source, const int* ovector, RegExp* reg)
+{
+    int i = replacement.find('$', 0);
+    if (UNLIKELY(i != -1))
+        return substituteBackreferencesSlow(replacement, source, ovector, reg, i);
+    return replacement;
 }
 
 static inline int localeCompare(const UString& a, const UString& b)
@@ -216,7 +230,7 @@ static inline int localeCompare(const UString& a, const UString& b)
 JSValue JSC_HOST_CALL stringProtoFuncReplace(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
 {
     JSString* sourceVal = thisValue.toThisJSString(exec);
-    const UString& source = sourceVal->value();
+    const UString& source = sourceVal->value(exec);
 
     JSValue pattern = args.at(0);
 
@@ -249,7 +263,7 @@ JSValue JSC_HOST_CALL stringProtoFuncReplace(ExecState* exec, JSObject*, JSValue
                 return jsNull();
             while (true) {
                 int matchIndex;
-                int matchLen;
+                int matchLen = 0;
                 int* ovector;
                 regExpConstructor->performMatch(reg, source, startPosition, matchIndex, matchLen, &ovector);
                 if (matchIndex < 0)
@@ -273,7 +287,8 @@ JSValue JSC_HOST_CALL stringProtoFuncReplace(ExecState* exec, JSObject*, JSValue
                 cachedCall.setArgument(i++, sourceVal);
                 
                 cachedCall.setThis(exec->globalThisValue());
-                replacements.append(cachedCall.call().toString(cachedCall.newCallFrame()));
+                JSValue result = cachedCall.call();
+                replacements.append(result.toString(cachedCall.newCallFrame(exec)));
                 if (exec->hadException())
                     break;
 
@@ -290,7 +305,7 @@ JSValue JSC_HOST_CALL stringProtoFuncReplace(ExecState* exec, JSObject*, JSValue
         } else {
             do {
                 int matchIndex;
-                int matchLen;
+                int matchLen = 0;
                 int* ovector;
                 regExpConstructor->performMatch(reg, source, startPosition, matchIndex, matchLen, &ovector);
                 if (matchIndex < 0)
@@ -414,12 +429,14 @@ JSValue JSC_HOST_CALL stringProtoFuncCharCodeAt(ExecState* exec, JSObject*, JSVa
 
 JSValue JSC_HOST_CALL stringProtoFuncConcat(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
 {
-    UString s = thisValue.toThisString(exec);
+    if (thisValue.isString() && (args.size() == 1)) {
+        JSValue v = args.at(0);
+        return v.isString()
+            ? jsString(exec, asString(thisValue), asString(v))
+            : jsString(exec, asString(thisValue), v.toString(exec));
+    }
 
-    ArgList::const_iterator end = args.end();
-    for (ArgList::const_iterator it = args.begin(); it != end; ++it)
-        s += (*it).toString(exec);
-    return jsString(exec, s);
+    return jsString(exec, thisValue, args);
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncIndexOf(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -461,6 +478,11 @@ JSValue JSC_HOST_CALL stringProtoFuncLastIndexOf(ExecState* exec, JSObject*, JSV
         dpos = 0;
     else if (!(dpos <= len)) // true for NaN
         dpos = len;
+#if OS(SYMBIAN)
+    // Work around for broken NaN compare operator
+    else if (isnan(dpos))
+        dpos = len;
+#endif
     return jsNumber(exec, s.rfind(u2, static_cast<int>(dpos)));
 }
 
@@ -485,7 +507,7 @@ JSValue JSC_HOST_CALL stringProtoFuncMatch(ExecState* exec, JSObject*, JSValue t
     }
     RegExpConstructor* regExpConstructor = exec->lexicalGlobalObject()->regExpConstructor();
     int pos;
-    int matchLength;
+    int matchLength = 0;
     regExpConstructor->performMatch(reg.get(), u, 0, pos, matchLength);
     if (!(reg->global())) {
         // case without 'g' flag is handled like RegExp.prototype.exec
@@ -535,7 +557,7 @@ JSValue JSC_HOST_CALL stringProtoFuncSearch(ExecState* exec, JSObject*, JSValue
     }
     RegExpConstructor* regExpConstructor = exec->lexicalGlobalObject()->regExpConstructor();
     int pos;
-    int matchLength;
+    int matchLength = 0;
     regExpConstructor->performMatch(reg.get(), u, 0, pos, matchLength);
     return jsNumber(exec, pos);
 }
@@ -683,7 +705,7 @@ JSValue JSC_HOST_CALL stringProtoFuncSubstring(ExecState* exec, JSObject*, JSVal
 JSValue JSC_HOST_CALL stringProtoFuncToLowerCase(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     JSString* sVal = thisValue.toThisJSString(exec);
-    const UString& s = sVal->value();
+    const UString& s = sVal->value(exec);
 
     int sSize = s.size();
     if (!sSize)
@@ -699,7 +721,7 @@ JSValue JSC_HOST_CALL stringProtoFuncToLowerCase(ExecState* exec, JSObject*, JSV
         buffer[i] = toASCIILower(c);
     }
     if (!(ored & ~0x7f))
-        return jsString(exec, UString(buffer.releaseBuffer(), sSize, false));
+        return jsString(exec, UString::adopt(buffer));
 
     bool error;
     int length = Unicode::toLower(buffer.data(), sSize, sData, sSize, &error);
@@ -709,15 +731,18 @@ JSValue JSC_HOST_CALL stringProtoFuncToLowerCase(ExecState* exec, JSObject*, JSV
         if (error)
             return sVal;
     }
-    if (length == sSize && memcmp(buffer.data(), sData, length * sizeof(UChar)) == 0)
-        return sVal;
-    return jsString(exec, UString(buffer.releaseBuffer(), length, false));
+    if (length == sSize) {
+        if (memcmp(buffer.data(), sData, length * sizeof(UChar)) == 0)
+            return sVal;
+    } else
+        buffer.resize(length);
+    return jsString(exec, UString::adopt(buffer));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncToUpperCase(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     JSString* sVal = thisValue.toThisJSString(exec);
-    const UString& s = sVal->value();
+    const UString& s = sVal->value(exec);
 
     int sSize = s.size();
     if (!sSize)
@@ -733,7 +758,7 @@ JSValue JSC_HOST_CALL stringProtoFuncToUpperCase(ExecState* exec, JSObject*, JSV
         buffer[i] = toASCIIUpper(c);
     }
     if (!(ored & ~0x7f))
-        return jsString(exec, UString(buffer.releaseBuffer(), sSize, false));
+        return jsString(exec, UString::adopt(buffer));
 
     bool error;
     int length = Unicode::toUpper(buffer.data(), sSize, sData, sSize, &error);
@@ -743,9 +768,12 @@ JSValue JSC_HOST_CALL stringProtoFuncToUpperCase(ExecState* exec, JSObject*, JSV
         if (error)
             return sVal;
     }
-    if (length == sSize && memcmp(buffer.data(), sData, length * sizeof(UChar)) == 0)
-        return sVal;
-    return jsString(exec, UString(buffer.releaseBuffer(), length, false));
+    if (length == sSize) {
+        if (memcmp(buffer.data(), sData, length * sizeof(UChar)) == 0)
+            return sVal;
+    } else
+        buffer.resize(length);
+    return jsString(exec, UString::adopt(buffer));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncLocaleCompare(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -761,62 +789,62 @@ JSValue JSC_HOST_CALL stringProtoFuncLocaleCompare(ExecState* exec, JSObject*, J
 JSValue JSC_HOST_CALL stringProtoFuncBig(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<big>" + s + "</big>");
+    return jsNontrivialString(exec, makeString("<big>", s, "</big>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncSmall(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<small>" + s + "</small>");
+    return jsNontrivialString(exec, makeString("<small>", s, "</small>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncBlink(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<blink>" + s + "</blink>");
+    return jsNontrivialString(exec, makeString("<blink>", s, "</blink>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncBold(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<b>" + s + "</b>");
+    return jsNontrivialString(exec, makeString("<b>", s, "</b>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncFixed(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsString(exec, "<tt>" + s + "</tt>");
+    return jsString(exec, makeString("<tt>", s, "</tt>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncItalics(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<i>" + s + "</i>");
+    return jsNontrivialString(exec, makeString("<i>", s, "</i>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncStrike(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<strike>" + s + "</strike>");
+    return jsNontrivialString(exec, makeString("<strike>", s, "</strike>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncSub(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<sub>" + s + "</sub>");
+    return jsNontrivialString(exec, makeString("<sub>", s, "</sub>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncSup(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
 {
     UString s = thisValue.toThisString(exec);
-    return jsNontrivialString(exec, "<sup>" + s + "</sup>");
+    return jsNontrivialString(exec, makeString("<sup>", s, "</sup>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncFontcolor(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
 {
     UString s = thisValue.toThisString(exec);
     JSValue a0 = args.at(0);
-    return jsNontrivialString(exec, "<font color=\"" + a0.toString(exec) + "\">" + s + "</font>");
+    return jsNontrivialString(exec, makeString("<font color=\"", a0.toString(exec), "\">", s, "</font>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncFontsize(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -829,7 +857,8 @@ JSValue JSC_HOST_CALL stringProtoFuncFontsize(ExecState* exec, JSObject*, JSValu
         unsigned stringSize = s.size();
         unsigned bufferSize = 22 + stringSize;
         UChar* buffer;
-        if (!tryFastMalloc(bufferSize * sizeof(UChar)).getValue(buffer))
+        PassRefPtr<UStringImpl> impl = UStringImpl::tryCreateUninitialized(bufferSize, buffer);
+        if (!impl)
             return jsUndefined();
         buffer[0] = '<';
         buffer[1] = 'f';
@@ -854,17 +883,17 @@ JSValue JSC_HOST_CALL stringProtoFuncFontsize(ExecState* exec, JSObject*, JSValu
         buffer[19 + stringSize] = 'n';
         buffer[20 + stringSize] = 't';
         buffer[21 + stringSize] = '>';
-        return jsNontrivialString(exec, UString(buffer, bufferSize, false));
+        return jsNontrivialString(exec, impl);
     }
 
-    return jsNontrivialString(exec, "<font size=\"" + a0.toString(exec) + "\">" + s + "</font>");
+    return jsNontrivialString(exec, makeString("<font size=\"", a0.toString(exec), "\">", s, "</font>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncAnchor(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
 {
     UString s = thisValue.toThisString(exec);
     JSValue a0 = args.at(0);
-    return jsNontrivialString(exec, "<a name=\"" + a0.toString(exec) + "\">" + s + "</a>");
+    return jsNontrivialString(exec, makeString("<a name=\"", a0.toString(exec), "\">", s, "</a>"));
 }
 
 JSValue JSC_HOST_CALL stringProtoFuncLink(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
@@ -877,7 +906,8 @@ JSValue JSC_HOST_CALL stringProtoFuncLink(ExecState* exec, JSObject*, JSValue th
     unsigned stringSize = s.size();
     unsigned bufferSize = 15 + linkTextSize + stringSize;
     UChar* buffer;
-    if (!tryFastMalloc(bufferSize * sizeof(UChar)).getValue(buffer))
+    PassRefPtr<UStringImpl> impl = UStringImpl::tryCreateUninitialized(bufferSize, buffer);
+    if (!impl)
         return jsUndefined();
     buffer[0] = '<';
     buffer[1] = 'a';
@@ -896,7 +926,54 @@ JSValue JSC_HOST_CALL stringProtoFuncLink(ExecState* exec, JSObject*, JSValue th
     buffer[12 + linkTextSize + stringSize] = '/';
     buffer[13 + linkTextSize + stringSize] = 'a';
     buffer[14 + linkTextSize + stringSize] = '>';
-    return jsNontrivialString(exec, UString(buffer, bufferSize, false));
+    return jsNontrivialString(exec, impl);
 }
 
+enum {
+    TrimLeft = 1,
+    TrimRight = 2
+};
+
+static inline bool isTrimWhitespace(UChar c)
+{
+    return isStrWhiteSpace(c) || c == 0x200b;
+}
+
+static inline JSValue trimString(ExecState* exec, JSValue thisValue, int trimKind)
+{
+    UString str = thisValue.toThisString(exec);
+    int left = 0;
+    if (trimKind & TrimLeft) {
+        while (left < str.size() && isTrimWhitespace(str[left]))
+            left++;
+    }
+    int right = str.size();
+    if (trimKind & TrimRight) {
+        while (right > left && isTrimWhitespace(str[right - 1]))
+            right--;
+    }
+
+    // Don't gc allocate a new string if we don't have to.
+    if (left == 0 && right == str.size() && thisValue.isString())
+        return thisValue;
+
+    return jsString(exec, str.substr(left, right - left));
+}
+
+JSValue JSC_HOST_CALL stringProtoFuncTrim(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
+{
+    return trimString(exec, thisValue, TrimLeft | TrimRight);
+}
+
+JSValue JSC_HOST_CALL stringProtoFuncTrimLeft(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
+{
+    return trimString(exec, thisValue, TrimLeft);
+}
+
+JSValue JSC_HOST_CALL stringProtoFuncTrimRight(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
+{
+    return trimString(exec, thisValue, TrimRight);
+}
+    
+    
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.h
index 580e13d..3a6a2a3 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StringPrototype.h
@@ -29,7 +29,7 @@ namespace JSC {
 
     class StringPrototype : public StringObject {
     public:
-        StringPrototype(ExecState*, PassRefPtr<Structure>);
+        StringPrototype(ExecState*, NonNullPassRefPtr<Structure>);
 
         virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.cpp
index be817c3..8e50dd1 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.cpp
@@ -28,9 +28,10 @@
 
 #include "Identifier.h"
 #include "JSObject.h"
+#include "JSPropertyNameIterator.h"
+#include "Lookup.h"
 #include "PropertyNameArray.h"
 #include "StructureChain.h"
-#include "Lookup.h"
 #include <wtf/RefCountedLeakCounter.h>
 #include <wtf/RefPtr.h>
 
@@ -75,6 +76,8 @@ static HashSet<Structure*>& ignoreSet = *(new HashSet<Structure*>);
 static HashSet<Structure*>& liveStructureSet = *(new HashSet<Structure*>);
 #endif
 
+static int comparePropertyMapEntryIndices(const void* a, const void* b);
+
 void Structure::dumpStatistics()
 {
 #if DUMP_STRUCTURE_ID_STATISTICS
@@ -130,6 +133,7 @@ Structure::Structure(JSValue prototype, const TypeInfo& typeInfo)
     , m_isPinnedPropertyTable(false)
     , m_hasGetterSetterProperties(false)
     , m_attributesInPrevious(0)
+    , m_specificFunctionThrashCount(0)
 {
     ASSERT(m_prototype);
     ASSERT(m_prototype.isObject() || m_prototype.isNull());
@@ -158,9 +162,9 @@ Structure::~Structure()
             m_previous->table.removeAnonymousSlotTransition(m_anonymousSlotsInPrevious);
 
     }
-
-    if (m_cachedPropertyNameArrayData)
-        m_cachedPropertyNameArrayData->setCachedStructure(0);
+    
+    if (m_enumerationCache)
+        m_enumerationCache->setCachedStructure(0);
 
     if (m_propertyTable) {
         unsigned entryCount = m_propertyTable->keyCount + m_propertyTable->deletedSentinelCount;
@@ -281,59 +285,6 @@ void Structure::materializePropertyMap()
     }
 }
 
-void Structure::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, JSObject* baseObject, bool includeNonEnumerable)
-{
-    getNamesFromPropertyTable(propertyNames, includeNonEnumerable);
-    getNamesFromClassInfoTable(exec, baseObject->classInfo(), propertyNames, includeNonEnumerable);
-}
-
-void Structure::getEnumerablePropertyNames(ExecState* exec, PropertyNameArray& propertyNames, JSObject* baseObject)
-{
-    bool shouldCache = propertyNames.shouldCache() && !(propertyNames.size() || isDictionary());
-
-    if (shouldCache && m_cachedPropertyNameArrayData) {
-        if (m_cachedPropertyNameArrayData->cachedPrototypeChain() == prototypeChain(exec)) {
-            propertyNames.setData(m_cachedPropertyNameArrayData);
-            return;
-        }
-        clearEnumerationCache();
-    }
-
-    baseObject->getOwnPropertyNames(exec, propertyNames);
-
-    if (m_prototype.isObject()) {
-        propertyNames.setShouldCache(false); // No need for our prototypes to waste memory on caching, since they're not being enumerated directly.
-        JSObject* prototype = asObject(m_prototype);
-        while(1) {
-            if (!prototype->structure()->typeInfo().hasDefaultGetPropertyNames()) {
-                prototype->getPropertyNames(exec, propertyNames);
-                break;
-            }
-            prototype->getOwnPropertyNames(exec, propertyNames);
-            JSValue nextProto = prototype->prototype();
-            if (!nextProto.isObject())
-                break;
-            prototype = asObject(nextProto);
-        }
-    }
-
-    if (shouldCache) {
-        StructureChain* protoChain = prototypeChain(exec);
-        m_cachedPropertyNameArrayData = propertyNames.data();
-        if (!protoChain->isCacheable())
-            return;
-        m_cachedPropertyNameArrayData->setCachedPrototypeChain(protoChain);
-        m_cachedPropertyNameArrayData->setCachedStructure(this);
-    }
-}
-
-void Structure::clearEnumerationCache()
-{
-    if (m_cachedPropertyNameArrayData)
-        m_cachedPropertyNameArrayData->setCachedStructure(0);
-    m_cachedPropertyNameArrayData.clear();
-}
-
 void Structure::growPropertyStorageCapacity()
 {
     if (m_propertyStorageCapacity == JSObject::inlineStorageCapacity)
@@ -351,7 +302,7 @@ void Structure::despecifyDictionaryFunction(const Identifier& propertyName)
     ASSERT(isDictionary());
     ASSERT(m_propertyTable);
 
-    unsigned i = rep->computedHash();
+    unsigned i = rep->existingHash();
 
 #if DUMP_PROPERTYMAP_STATS
     ++numProbes;
@@ -369,7 +320,7 @@ void Structure::despecifyDictionaryFunction(const Identifier& propertyName)
     ++numCollisions;
 #endif
 
-    unsigned k = 1 | doubleHash(rep->computedHash());
+    unsigned k = 1 | doubleHash(rep->existingHash());
 
     while (1) {
         i += k;
@@ -407,6 +358,9 @@ PassRefPtr<Structure> Structure::addPropertyTransition(Structure* structure, con
     ASSERT(!structure->isDictionary());
     ASSERT(structure->typeInfo().type() == ObjectType);
     ASSERT(!Structure::addPropertyTransitionToExistingStructure(structure, propertyName, attributes, specificValue, offset));
+    
+    if (structure->m_specificFunctionThrashCount == maxSpecificFunctionThrashCount)
+        specificValue = 0;
 
     if (structure->transitionCount() > s_maxTransitionLength) {
         RefPtr<Structure> transition = toCacheableDictionaryTransition(structure);
@@ -426,6 +380,8 @@ PassRefPtr<Structure> Structure::addPropertyTransition(Structure* structure, con
     transition->m_specificValueInPrevious = specificValue;
     transition->m_propertyStorageCapacity = structure->m_propertyStorageCapacity;
     transition->m_hasGetterSetterProperties = structure->m_hasGetterSetterProperties;
+    transition->m_hasNonEnumerableProperties = structure->m_hasNonEnumerableProperties;
+    transition->m_specificFunctionThrashCount = structure->m_specificFunctionThrashCount;
 
     if (structure->m_propertyTable) {
         if (structure->m_isPinnedPropertyTable)
@@ -468,6 +424,8 @@ PassRefPtr<Structure> Structure::changePrototypeTransition(Structure* structure,
 
     transition->m_propertyStorageCapacity = structure->m_propertyStorageCapacity;
     transition->m_hasGetterSetterProperties = structure->m_hasGetterSetterProperties;
+    transition->m_hasNonEnumerableProperties = structure->m_hasNonEnumerableProperties;
+    transition->m_specificFunctionThrashCount = structure->m_specificFunctionThrashCount;
 
     // Don't set m_offset, as one can not transition to this.
 
@@ -480,10 +438,13 @@ PassRefPtr<Structure> Structure::changePrototypeTransition(Structure* structure,
 
 PassRefPtr<Structure> Structure::despecifyFunctionTransition(Structure* structure, const Identifier& replaceFunction)
 {
+    ASSERT(structure->m_specificFunctionThrashCount < maxSpecificFunctionThrashCount);
     RefPtr<Structure> transition = create(structure->storedPrototype(), structure->typeInfo());
 
     transition->m_propertyStorageCapacity = structure->m_propertyStorageCapacity;
     transition->m_hasGetterSetterProperties = structure->m_hasGetterSetterProperties;
+    transition->m_hasNonEnumerableProperties = structure->m_hasNonEnumerableProperties;
+    transition->m_specificFunctionThrashCount = structure->m_specificFunctionThrashCount + 1;
 
     // Don't set m_offset, as one can not transition to this.
 
@@ -491,8 +452,12 @@ PassRefPtr<Structure> Structure::despecifyFunctionTransition(Structure* structur
     transition->m_propertyTable = structure->copyPropertyTable();
     transition->m_isPinnedPropertyTable = true;
 
-    bool removed = transition->despecifyFunction(replaceFunction);
-    ASSERT_UNUSED(removed, removed);
+    if (transition->m_specificFunctionThrashCount == maxSpecificFunctionThrashCount)
+        transition->despecifyAllFunctions();
+    else {
+        bool removed = transition->despecifyFunction(replaceFunction);
+        ASSERT_UNUSED(removed, removed);
+    }
 
     return transition.release();
 }
@@ -515,6 +480,8 @@ PassRefPtr<Structure> Structure::addAnonymousSlotsTransition(Structure* structur
     transition->m_specificValueInPrevious = 0;
     transition->m_propertyStorageCapacity = structure->m_propertyStorageCapacity;
     transition->m_hasGetterSetterProperties = structure->m_hasGetterSetterProperties;
+    transition->m_hasNonEnumerableProperties = structure->m_hasNonEnumerableProperties;
+    transition->m_specificFunctionThrashCount = structure->m_specificFunctionThrashCount;
 
     if (structure->m_propertyTable) {
         if (structure->m_isPinnedPropertyTable)
@@ -543,6 +510,8 @@ PassRefPtr<Structure> Structure::getterSetterTransition(Structure* structure)
     RefPtr<Structure> transition = create(structure->storedPrototype(), structure->typeInfo());
     transition->m_propertyStorageCapacity = structure->m_propertyStorageCapacity;
     transition->m_hasGetterSetterProperties = transition->m_hasGetterSetterProperties;
+    transition->m_hasNonEnumerableProperties = structure->m_hasNonEnumerableProperties;
+    transition->m_specificFunctionThrashCount = structure->m_specificFunctionThrashCount;
 
     // Don't set m_offset, as one can not transition to this.
 
@@ -561,6 +530,8 @@ PassRefPtr<Structure> Structure::toDictionaryTransition(Structure* structure, Di
     transition->m_dictionaryKind = kind;
     transition->m_propertyStorageCapacity = structure->m_propertyStorageCapacity;
     transition->m_hasGetterSetterProperties = structure->m_hasGetterSetterProperties;
+    transition->m_hasNonEnumerableProperties = structure->m_hasNonEnumerableProperties;
+    transition->m_specificFunctionThrashCount = structure->m_specificFunctionThrashCount;
     
     structure->materializePropertyMapIfNecessary();
     transition->m_propertyTable = structure->copyPropertyTable();
@@ -579,43 +550,75 @@ PassRefPtr<Structure> Structure::toUncacheableDictionaryTransition(Structure* st
     return toDictionaryTransition(structure, UncachedDictionaryKind);
 }
 
-PassRefPtr<Structure> Structure::fromDictionaryTransition(Structure* structure)
+PassRefPtr<Structure> Structure::flattenDictionaryStructure(JSObject* object)
 {
-    ASSERT(structure->isDictionary());
-
-    // Since dictionary Structures are not shared, and no opcodes specialize
-    // for them, we don't need to allocate a new Structure when transitioning
-    // to non-dictionary status.
-
-    // FIMXE: We can make this more efficient by canonicalizing the Structure (draining the
-    // deleted offsets vector) before transitioning from dictionary. 
-    if (!structure->m_propertyTable || !structure->m_propertyTable->deletedOffsets || structure->m_propertyTable->deletedOffsets->isEmpty())
-        structure->m_dictionaryKind = NoneDictionaryKind;
+    ASSERT(isDictionary());
+    if (isUncacheableDictionary()) {
+        ASSERT(m_propertyTable);
+        Vector<PropertyMapEntry*> sortedPropertyEntries(m_propertyTable->keyCount);
+        PropertyMapEntry** p = sortedPropertyEntries.data();
+        unsigned entryCount = m_propertyTable->keyCount + m_propertyTable->deletedSentinelCount;
+        for (unsigned i = 1; i <= entryCount; i++) {
+            if (m_propertyTable->entries()[i].key)
+                *p++ = &m_propertyTable->entries()[i];
+        }
+        size_t propertyCount = p - sortedPropertyEntries.data();
+        qsort(sortedPropertyEntries.data(), propertyCount, sizeof(PropertyMapEntry*), comparePropertyMapEntryIndices);
+        sortedPropertyEntries.resize(propertyCount);
+
+        // We now have the properties currently defined on this object
+        // in the order that they are expected to be in, but we need to
+        // reorder the storage, so we have to copy the current values out
+        Vector<JSValue> values(propertyCount);
+        unsigned anonymousSlotCount = m_propertyTable->anonymousSlotCount;
+        for (unsigned i = 0; i < propertyCount; i++) {
+            PropertyMapEntry* entry = sortedPropertyEntries[i];
+            values[i] = object->getDirectOffset(entry->offset);
+            // Update property table to have the new property offsets
+            entry->offset = anonymousSlotCount + i;
+            entry->index = i;
+        }
+        
+        // Copy the original property values into their final locations
+        for (unsigned i = 0; i < propertyCount; i++)
+            object->putDirectOffset(anonymousSlotCount + i, values[i]);
+
+        if (m_propertyTable->deletedOffsets) {
+            delete m_propertyTable->deletedOffsets;
+            m_propertyTable->deletedOffsets = 0;
+        }
+    }
 
-    return structure;
+    m_dictionaryKind = NoneDictionaryKind;
+    return this;
 }
 
 size_t Structure::addPropertyWithoutTransition(const Identifier& propertyName, unsigned attributes, JSCell* specificValue)
 {
+    ASSERT(!m_enumerationCache);
+
+    if (m_specificFunctionThrashCount == maxSpecificFunctionThrashCount)
+        specificValue = 0;
+
     materializePropertyMapIfNecessary();
 
     m_isPinnedPropertyTable = true;
+
     size_t offset = put(propertyName, attributes, specificValue);
     if (propertyStorageSize() > propertyStorageCapacity())
         growPropertyStorageCapacity();
-    clearEnumerationCache();
     return offset;
 }
 
 size_t Structure::removePropertyWithoutTransition(const Identifier& propertyName)
 {
     ASSERT(isUncacheableDictionary());
+    ASSERT(!m_enumerationCache);
 
     materializePropertyMapIfNecessary();
 
     m_isPinnedPropertyTable = true;
     size_t offset = remove(propertyName);
-    clearEnumerationCache();
     return offset;
 }
 
@@ -682,7 +685,7 @@ size_t Structure::get(const UString::Rep* rep, unsigned& attributes, JSCell*& sp
     if (!m_propertyTable)
         return notFound;
 
-    unsigned i = rep->computedHash();
+    unsigned i = rep->existingHash();
 
 #if DUMP_PROPERTYMAP_STATS
     ++numProbes;
@@ -702,7 +705,7 @@ size_t Structure::get(const UString::Rep* rep, unsigned& attributes, JSCell*& sp
     ++numCollisions;
 #endif
 
-    unsigned k = 1 | doubleHash(rep->computedHash());
+    unsigned k = 1 | doubleHash(rep->existingHash());
 
     while (1) {
         i += k;
@@ -733,7 +736,7 @@ bool Structure::despecifyFunction(const Identifier& propertyName)
 
     UString::Rep* rep = propertyName._ustring.rep();
 
-    unsigned i = rep->computedHash();
+    unsigned i = rep->existingHash();
 
 #if DUMP_PROPERTYMAP_STATS
     ++numProbes;
@@ -753,7 +756,7 @@ bool Structure::despecifyFunction(const Identifier& propertyName)
     ++numCollisions;
 #endif
 
-    unsigned k = 1 | doubleHash(rep->computedHash());
+    unsigned k = 1 | doubleHash(rep->existingHash());
 
     while (1) {
         i += k;
@@ -774,6 +777,17 @@ bool Structure::despecifyFunction(const Identifier& propertyName)
     }
 }
 
+void Structure::despecifyAllFunctions()
+{
+    materializePropertyMapIfNecessary();
+    if (!m_propertyTable)
+        return;
+    
+    unsigned entryCount = m_propertyTable->keyCount + m_propertyTable->deletedSentinelCount;
+    for (unsigned i = 1; i <= entryCount; ++i)
+        m_propertyTable->entries()[i].specificValue = 0;
+}
+
 size_t Structure::put(const Identifier& propertyName, unsigned attributes, JSCell* specificValue)
 {
     ASSERT(!propertyName.isNull());
@@ -781,6 +795,9 @@ size_t Structure::put(const Identifier& propertyName, unsigned attributes, JSCel
 
     checkConsistency();
 
+    if (attributes & DontEnum)
+        m_hasNonEnumerableProperties = true;
+
     UString::Rep* rep = propertyName._ustring.rep();
 
     if (!m_propertyTable)
@@ -788,7 +805,7 @@ size_t Structure::put(const Identifier& propertyName, unsigned attributes, JSCel
 
     // FIXME: Consider a fast case for tables with no deleted sentinels.
 
-    unsigned i = rep->computedHash();
+    unsigned i = rep->existingHash();
     unsigned k = 0;
     bool foundDeletedElement = false;
     unsigned deletedElementIndex = 0; // initialize to make the compiler happy
@@ -811,7 +828,7 @@ size_t Structure::put(const Identifier& propertyName, unsigned attributes, JSCel
         }
 
         if (k == 0) {
-            k = 1 | doubleHash(rep->computedHash());
+            k = 1 | doubleHash(rep->existingHash());
 #if DUMP_PROPERTYMAP_STATS
             ++numCollisions;
 #endif
@@ -891,7 +908,7 @@ size_t Structure::remove(const Identifier& propertyName)
 #endif
 
     // Find the thing to remove.
-    unsigned i = rep->computedHash();
+    unsigned i = rep->existingHash();
     unsigned k = 0;
     unsigned entryIndex;
     UString::Rep* key = 0;
@@ -905,7 +922,7 @@ size_t Structure::remove(const Identifier& propertyName)
             break;
 
         if (k == 0) {
-            k = 1 | doubleHash(rep->computedHash());
+            k = 1 | doubleHash(rep->existingHash());
 #if DUMP_PROPERTYMAP_STATS
             ++numCollisions;
 #endif
@@ -949,7 +966,7 @@ void Structure::insertIntoPropertyMapHashTable(const PropertyMapEntry& entry)
 {
     ASSERT(m_propertyTable);
 
-    unsigned i = entry.key->computedHash();
+    unsigned i = entry.key->existingHash();
     unsigned k = 0;
 
 #if DUMP_PROPERTYMAP_STATS
@@ -962,7 +979,7 @@ void Structure::insertIntoPropertyMapHashTable(const PropertyMapEntry& entry)
             break;
 
         if (k == 0) {
-            k = 1 | doubleHash(entry.key->computedHash());
+            k = 1 | doubleHash(entry.key->existingHash());
 #if DUMP_PROPERTYMAP_STATS
             ++numCollisions;
 #endif
@@ -1045,7 +1062,7 @@ void Structure::rehashPropertyMapHashTable(unsigned newTableSize)
     checkConsistency();
 }
 
-static int comparePropertyMapEntryIndices(const void* a, const void* b)
+int comparePropertyMapEntryIndices(const void* a, const void* b)
 {
     unsigned ia = static_cast<PropertyMapEntry* const*>(a)[0]->index;
     unsigned ib = static_cast<PropertyMapEntry* const*>(b)[0]->index;
@@ -1056,7 +1073,7 @@ static int comparePropertyMapEntryIndices(const void* a, const void* b)
     return 0;
 }
 
-void Structure::getNamesFromPropertyTable(PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void Structure::getPropertyNames(PropertyNameArray& propertyNames, EnumerationMode mode)
 {
     materializePropertyMapIfNecessary();
     if (!m_propertyTable)
@@ -1067,7 +1084,8 @@ void Structure::getNamesFromPropertyTable(PropertyNameArray& propertyNames, bool
         int i = 0;
         unsigned entryCount = m_propertyTable->keyCount + m_propertyTable->deletedSentinelCount;
         for (unsigned k = 1; k <= entryCount; k++) {
-            if (m_propertyTable->entries()[k].key && (!(m_propertyTable->entries()[k].attributes & DontEnum) || includeNonEnumerable)) {
+            ASSERT(m_hasNonEnumerableProperties || !(m_propertyTable->entries()[k].attributes & DontEnum));
+            if (m_propertyTable->entries()[k].key && (!(m_propertyTable->entries()[k].attributes & DontEnum) || (mode == IncludeDontEnumProperties))) {
                 PropertyMapEntry* value = &m_propertyTable->entries()[k];
                 int j;
                 for (j = i - 1; j >= 0 && a[j]->index > value->index; --j)
@@ -1094,7 +1112,7 @@ void Structure::getNamesFromPropertyTable(PropertyNameArray& propertyNames, bool
     PropertyMapEntry** p = sortedEnumerables.data();
     unsigned entryCount = m_propertyTable->keyCount + m_propertyTable->deletedSentinelCount;
     for (unsigned i = 1; i <= entryCount; i++) {
-        if (m_propertyTable->entries()[i].key && (!(m_propertyTable->entries()[i].attributes & DontEnum) || includeNonEnumerable))
+        if (m_propertyTable->entries()[i].key && (!(m_propertyTable->entries()[i].attributes & DontEnum) || (mode == IncludeDontEnumProperties)))
             *p++ = &m_propertyTable->entries()[i];
     }
 
@@ -1113,25 +1131,6 @@ void Structure::getNamesFromPropertyTable(PropertyNameArray& propertyNames, bool
     }
 }
 
-void Structure::getNamesFromClassInfoTable(ExecState* exec, const ClassInfo* classInfo, PropertyNameArray& propertyNames, bool includeNonEnumerable)
-{
-    // Add properties from the static hashtables of properties
-    for (; classInfo; classInfo = classInfo->parentClass) {
-        const HashTable* table = classInfo->propHashTable(exec);
-        if (!table)
-            continue;
-        table->initializeIfNeeded(exec);
-        ASSERT(table->table);
-
-        int hashSizeMask = table->compactSize - 1;
-        const HashEntry* entry = table->table;
-        for (int i = 0; i <= hashSizeMask; ++i, ++entry) {
-            if (entry->key() && (!(entry->attributes() & DontEnum) || includeNonEnumerable))
-                propertyNames.add(entry->key());
-        }
-    }
-}
-
 #if DO_PROPERTYMAP_CONSTENCY_CHECK
 
 void Structure::checkConsistency()
@@ -1173,11 +1172,12 @@ void Structure::checkConsistency()
 
     unsigned nonEmptyEntryCount = 0;
     for (unsigned c = 1; c <= m_propertyTable->keyCount + m_propertyTable->deletedSentinelCount; ++c) {
+        ASSERT(m_hasNonEnumerableProperties || !(m_propertyTable->entries()[c].attributes & DontEnum));
         UString::Rep* rep = m_propertyTable->entries()[c].key;
         if (!rep)
             continue;
         ++nonEmptyEntryCount;
-        unsigned i = rep->computedHash();
+        unsigned i = rep->existingHash();
         unsigned k = 0;
         unsigned entryIndex;
         while (1) {
@@ -1186,7 +1186,7 @@ void Structure::checkConsistency()
             if (rep == m_propertyTable->entries()[entryIndex - 1].key)
                 break;
             if (k == 0)
-                k = 1 | doubleHash(rep->computedHash());
+                k = 1 | doubleHash(rep->existingHash());
             i += k;
         }
         ASSERT(entryIndex == c + 1);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.h
index d012ba9..5284258 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Structure.h
@@ -30,6 +30,8 @@
 #include "JSType.h"
 #include "JSValue.h"
 #include "PropertyMapHashTable.h"
+#include "PropertyNameArray.h"
+#include "Protect.h"
 #include "StructureTransitionTable.h"
 #include "JSTypeInfo.h"
 #include "UString.h"
@@ -49,6 +51,11 @@ namespace JSC {
     class PropertyNameArrayData;
     class StructureChain;
 
+    enum EnumerationMode {
+        ExcludeDontEnumProperties,
+        IncludeDontEnumProperties
+    };
+
     class Structure : public RefCounted<Structure> {
     public:
         friend class JIT;
@@ -72,11 +79,10 @@ namespace JSC {
         static PassRefPtr<Structure> getterSetterTransition(Structure*);
         static PassRefPtr<Structure> toCacheableDictionaryTransition(Structure*);
         static PassRefPtr<Structure> toUncacheableDictionaryTransition(Structure*);
-        static PassRefPtr<Structure> fromDictionaryTransition(Structure*);
 
-        ~Structure();
+        PassRefPtr<Structure> flattenDictionaryStructure(JSObject*);
 
-        void markAggregate(MarkStack&);
+        ~Structure();
 
         // These should be used with caution.  
         size_t addPropertyWithoutTransition(const Identifier& propertyName, unsigned attributes, JSCell* specificValue);
@@ -95,8 +101,8 @@ namespace JSC {
         Structure* previousID() const { return m_previous.get(); }
 
         void growPropertyStorageCapacity();
-        size_t propertyStorageCapacity() const { return m_propertyStorageCapacity; }
-        size_t propertyStorageSize() const { return m_propertyTable ? m_propertyTable->keyCount + m_propertyTable->anonymousSlotCount + (m_propertyTable->deletedOffsets ? m_propertyTable->deletedOffsets->size() : 0) : m_offset + 1; }
+        unsigned propertyStorageCapacity() const { return m_propertyStorageCapacity; }
+        unsigned propertyStorageSize() const { return m_propertyTable ? m_propertyTable->keyCount + m_propertyTable->anonymousSlotCount + (m_propertyTable->deletedOffsets ? m_propertyTable->deletedOffsets->size() : 0) : m_offset + 1; }
         bool isUsingInlineStorage() const;
 
         size_t get(const Identifier& propertyName);
@@ -116,17 +122,22 @@ namespace JSC {
             return hasTransition(propertyName._ustring.rep(), attributes);
         }
 
-        void getEnumerablePropertyNames(ExecState*, PropertyNameArray&, JSObject*);
-        void getOwnPropertyNames(ExecState*, PropertyNameArray&, JSObject*, bool includeNonEnumerable = false);
-
         bool hasGetterSetterProperties() const { return m_hasGetterSetterProperties; }
         void setHasGetterSetterProperties(bool hasGetterSetterProperties) { m_hasGetterSetterProperties = hasGetterSetterProperties; }
 
+        bool hasNonEnumerableProperties() const { return m_hasNonEnumerableProperties; }
+
+        bool hasAnonymousSlots() const { return m_propertyTable && m_propertyTable->anonymousSlotCount; }
+        
         bool isEmpty() const { return m_propertyTable ? !m_propertyTable->keyCount : m_offset == noOffset; }
 
-        JSCell* specificValue() { return m_specificValueInPrevious; }
         void despecifyDictionaryFunction(const Identifier& propertyName);
+        void disableSpecificFunctionTracking() { m_specificFunctionThrashCount = maxSpecificFunctionThrashCount; }
 
+        void setEnumerationCache(JSPropertyNameIterator* enumerationCache); // Defined in JSPropertyNameIterator.h.
+        JSPropertyNameIterator* enumerationCache() { return m_enumerationCache.get(); }
+        void getPropertyNames(PropertyNameArray&, EnumerationMode mode);
+        
     private:
         Structure(JSValue prototype, const TypeInfo&);
         
@@ -140,8 +151,6 @@ namespace JSC {
         size_t put(const Identifier& propertyName, unsigned attributes, JSCell* specificValue);
         size_t remove(const Identifier& propertyName);
         void addAnonymousSlots(unsigned slotCount);
-        void getNamesFromPropertyTable(PropertyNameArray&, bool includeNonEnumerable = false);
-        void getNamesFromClassInfoTable(ExecState*, const ClassInfo*, PropertyNameArray&, bool includeNonEnumerable = false);
 
         void expandPropertyMapHashTable();
         void rehashPropertyMapHashTable();
@@ -152,6 +161,7 @@ namespace JSC {
         void checkConsistency();
 
         bool despecifyFunction(const Identifier&);
+        void despecifyAllFunctions();
 
         PropertyMapHashTable* copyPropertyTable();
         void materializePropertyMap();
@@ -162,8 +172,6 @@ namespace JSC {
             materializePropertyMap();
         }
 
-        void clearEnumerationCache();
-
         signed char transitionCount() const
         {
             // Since the number of transitions is always the same as m_offset, we keep the size of Structure down by not storing both.
@@ -178,6 +186,8 @@ namespace JSC {
 
         static const signed char noOffset = -1;
 
+        static const unsigned maxSpecificFunctionThrashCount = 3;
+
         TypeInfo m_typeInfo;
 
         JSValue m_prototype;
@@ -189,16 +199,17 @@ namespace JSC {
 
         StructureTransitionTable table;
 
-        RefPtr<PropertyNameArrayData> m_cachedPropertyNameArrayData;
+        ProtectedPtr<JSPropertyNameIterator> m_enumerationCache;
 
         PropertyMapHashTable* m_propertyTable;
 
-        size_t m_propertyStorageCapacity;
+        uint32_t m_propertyStorageCapacity;
         signed char m_offset;
 
         unsigned m_dictionaryKind : 2;
         bool m_isPinnedPropertyTable : 1;
         bool m_hasGetterSetterProperties : 1;
+        bool m_hasNonEnumerableProperties : 1;
 #if COMPILER(WINSCW)
         // Workaround for Symbian WINSCW compiler that cannot resolve unsigned type of the declared 
         // bitfield, when used as argument in make_pair() function calls in structure.ccp.
@@ -208,6 +219,8 @@ namespace JSC {
         unsigned m_attributesInPrevious : 7;
 #endif
         unsigned m_anonymousSlotsInPrevious : 6;
+        unsigned m_specificFunctionThrashCount : 2;
+        // 4 free bits
     };
 
     inline size_t Structure::get(const Identifier& propertyName)
@@ -220,7 +233,7 @@ namespace JSC {
 
         UString::Rep* rep = propertyName._ustring.rep();
 
-        unsigned i = rep->computedHash();
+        unsigned i = rep->existingHash();
 
 #if DUMP_PROPERTYMAP_STATS
         ++numProbes;
@@ -237,7 +250,7 @@ namespace JSC {
         ++numCollisions;
 #endif
 
-        unsigned k = 1 | WTF::doubleHash(rep->computedHash());
+        unsigned k = 1 | WTF::doubleHash(rep->existingHash());
 
         while (1) {
             i += k;
@@ -304,7 +317,7 @@ namespace JSC {
         TransitionTable* transitionTable = new TransitionTable;
         setTransitionTable(transitionTable);
         if (existingTransition)
-            add(make_pair(RefPtr<UString::Rep>(existingTransition->m_nameInPrevious.get()), existingTransition->m_attributesInPrevious), existingTransition, existingTransition->m_specificValueInPrevious);
+            add(std::make_pair(RefPtr<UString::Rep>(existingTransition->m_nameInPrevious.get()), existingTransition->m_attributesInPrevious), existingTransition, existingTransition->m_specificValueInPrevious);
     }
 } // namespace JSC
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.cpp
index 2c38b67..76e5518 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.cpp
@@ -25,7 +25,6 @@
 
 #include "config.h"
 #include "StructureChain.h"
-#include "Structure.h"
 
 #include "JSObject.h"
 #include "Structure.h"
@@ -47,23 +46,11 @@ StructureChain::StructureChain(Structure* head)
     m_vector[i] = 0;
 }
 
+#if OS(HPUX)
 PassRefPtr<StructureChain> StructureChain::create(Structure* head)
 {
     return adoptRef(new StructureChain(head));
 }
-
-bool StructureChain::isCacheable() const
-{
-    uint32_t i = 0;
-    
-    while (m_vector[i]) {
-        // Both classes of dictionary structure may change arbitrarily so we can't cache them
-        if (m_vector[i]->isDictionary())
-            return false;
-        if (!m_vector[i++]->typeInfo().hasDefaultGetPropertyNames())
-            return false;
-    }
-    return true;
-}
+#endif
 
 } // namespace JSC
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.h
index 5990e17..3496400 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureChain.h
@@ -36,10 +36,15 @@ namespace JSC {
     class Structure;
 
     class StructureChain : public RefCounted<StructureChain> {
+        friend class JIT;
+
     public:
+#if OS(HPUX)
         static PassRefPtr<StructureChain> create(Structure* head);
+#else
+        static PassRefPtr<StructureChain> create(Structure* head) { return adoptRef(new StructureChain(head)); }
+#endif
         RefPtr<Structure>* head() { return m_vector.get(); }
-        bool isCacheable() const;
 
     private:
         StructureChain(Structure* head);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureTransitionTable.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureTransitionTable.h
index 0fa7b73..35fb7e4 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureTransitionTable.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/StructureTransitionTable.h
@@ -42,7 +42,7 @@ namespace JSC {
         typedef std::pair<RefPtr<UString::Rep>, unsigned> Key;
         static unsigned hash(const Key& p)
         {
-            return p.first->computedHash();
+            return p.first->existingHash();
         }
 
         static bool equal(const Key& a, const Key& b)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/TimeoutChecker.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/TimeoutChecker.cpp
index 0a8bbd3..9e1f8b4 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/TimeoutChecker.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/TimeoutChecker.cpp
@@ -33,9 +33,9 @@
 #include "CallFrame.h"
 #include "JSGlobalObject.h"
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 #include <mach/mach.h>
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
 #include <windows.h>
 #else
 #include "CurrentTime.h"
@@ -54,7 +54,7 @@ static const int defaultIntervalBetweenChecks = 1000;
 // Returns the time the current thread has spent executing, in milliseconds.
 static inline unsigned getCPUTime()
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
     mach_msg_type_number_t infoCount = THREAD_BASIC_INFO_COUNT;
     thread_basic_info_data_t info;
 
@@ -67,7 +67,7 @@ static inline unsigned getCPUTime()
     time += info.system_time.seconds * 1000 + info.system_time.microseconds / 1000;
     
     return time;
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
     union {
         FILETIME fileTime;
         unsigned long long fileTimeAsLong;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Tracing.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Tracing.h
index e544f66..c28c85f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Tracing.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Tracing.h
@@ -33,7 +33,7 @@
 #define JAVASCRIPTCORE_GC_BEGIN()
 #define JAVASCRIPTCORE_GC_BEGIN_ENABLED() 0
 
-#define JAVASCRIPTCORE_GC_END(arg0, arg1)
+#define JAVASCRIPTCORE_GC_END()
 #define JAVASCRIPTCORE_GC_END_ENABLED() 0
 
 #define JAVASCRIPTCORE_GC_MARKED()
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.cpp
index e66ca93..a6b66cb 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.cpp
@@ -30,12 +30,12 @@
 #include "Identifier.h"
 #include "Operations.h"
 #include <ctype.h>
-#include <float.h>
 #include <limits.h>
 #include <limits>
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <wtf/ASCIICType.h>
 #include <wtf/Assertions.h>
 #include <wtf/MathExtras.h>
@@ -44,9 +44,6 @@
 #include <wtf/unicode/UTF8.h>
 #include <wtf/StringExtras.h>
 
-#if HAVE(STRING_H)
-#include <string.h>
-#endif
 #if HAVE(STRINGS_H)
 #include <strings.h>
 #endif
@@ -55,52 +52,11 @@ using namespace WTF;
 using namespace WTF::Unicode;
 using namespace std;
 
-// This can be tuned differently per platform by putting platform #ifs right here.
-// If you don't define this macro at all, then copyChars will just call directly
-// to memcpy.
-#define USTRING_COPY_CHARS_INLINE_CUTOFF 20
-
 namespace JSC {
  
 extern const double NaN;
 extern const double Inf;
 
-// This number must be at least 2 to avoid sharing empty, null as well as 1 character strings from SmallStrings.
-static const int minLengthToShare = 10;
-
-static inline size_t overflowIndicator() { return std::numeric_limits<size_t>::max(); }
-static inline size_t maxUChars() { return std::numeric_limits<size_t>::max() / sizeof(UChar); }
-
-static inline PossiblyNull<UChar*> allocChars(size_t length)
-{
-    ASSERT(length);
-    if (length > maxUChars())
-        return 0;
-    return tryFastMalloc(sizeof(UChar) * length);
-}
-
-static inline PossiblyNull<UChar*> reallocChars(UChar* buffer, size_t length)
-{
-    ASSERT(length);
-    if (length > maxUChars())
-        return 0;
-    return tryFastRealloc(buffer, sizeof(UChar) * length);
-}
-
-static inline void copyChars(UChar* destination, const UChar* source, unsigned numCharacters)
-{
-#ifdef USTRING_COPY_CHARS_INLINE_CUTOFF
-    if (numCharacters <= USTRING_COPY_CHARS_INLINE_CUTOFF) {
-        for (unsigned i = 0; i < numCharacters; ++i)
-            destination[i] = source[i];
-        return;
-    }
-#endif
-    memcpy(destination, source, numCharacters * sizeof(UChar));
-}
-
-COMPILE_ASSERT(sizeof(UChar) == 2, uchar_is_2_bytes);
-
 CString::CString(const char* c)
     : m_length(strlen(c))
     , m_data(new char[m_length + 1])
@@ -193,389 +149,52 @@ bool operator==(const CString& c1, const CString& c2)
 // These static strings are immutable, except for rc, whose initial value is chosen to 
 // reduce the possibility of it becoming zero due to ref/deref not being thread-safe.
 static UChar sharedEmptyChar;
-UString::BaseString* UString::Rep::nullBaseString;
-UString::BaseString* UString::Rep::emptyBaseString;
+UStringImpl* UStringImpl::s_null;
+UStringImpl* UStringImpl::s_empty;
 UString* UString::nullUString;
 
-static void initializeStaticBaseString(UString::BaseString& base)
-{
-    base.rc = INT_MAX / 2;
-    base.m_identifierTableAndFlags.setFlag(UString::Rep::StaticFlag);
-    base.checkConsistency();
-}
-
 void initializeUString()
 {
-    UString::Rep::nullBaseString = new UString::BaseString(0, 0);
-    initializeStaticBaseString(*UString::Rep::nullBaseString);
-
-    UString::Rep::emptyBaseString = new UString::BaseString(&sharedEmptyChar, 0);
-    initializeStaticBaseString(*UString::Rep::emptyBaseString);
-
+    UStringImpl::s_null = new UStringImpl(0, 0, UStringImpl::ConstructStaticString);
+    UStringImpl::s_empty = new UStringImpl(&sharedEmptyChar, 0, UStringImpl::ConstructStaticString);
     UString::nullUString = new UString;
 }
 
-static char* statBuffer = 0; // Only used for debugging via UString::ascii().
-
-PassRefPtr<UString::Rep> UString::Rep::createCopying(const UChar* d, int l)
-{
-    UChar* copyD = static_cast<UChar*>(fastMalloc(l * sizeof(UChar)));
-    copyChars(copyD, d, l);
-    return create(copyD, l);
-}
-
-PassRefPtr<UString::Rep> UString::Rep::createFromUTF8(const char* string)
+static PassRefPtr<UString::Rep> createRep(const char* c)
 {
-    if (!string)
-        return &UString::Rep::null();
-
-    size_t length = strlen(string);
-    Vector<UChar, 1024> buffer(length);
-    UChar* p = buffer.data();
-    if (conversionOK != convertUTF8ToUTF16(&string, string + length, &p, p + length))
+    if (!c)
         return &UString::Rep::null();
 
-    return UString::Rep::createCopying(buffer.data(), p - buffer.data());
-}
-
-PassRefPtr<UString::Rep> UString::Rep::create(UChar* string, int length, PassRefPtr<UString::SharedUChar> sharedBuffer)
-{
-    PassRefPtr<UString::Rep> rep = create(string, length);
-    rep->baseString()->setSharedBuffer(sharedBuffer);
-    rep->checkConsistency();
-    return rep;
-}
-
-UString::SharedUChar* UString::Rep::sharedBuffer()
-{
-    UString::BaseString* base = baseString();
-    if (len < minLengthToShare)
-        return 0;
-
-    return base->sharedBuffer();
-}
-
-void UString::Rep::destroy()
-{
-    checkConsistency();
-
-    // Static null and empty strings can never be destroyed, but we cannot rely on 
-    // reference counting, because ref/deref are not thread-safe.
-    if (!isStatic()) {
-        if (identifierTable())
-            Identifier::remove(this);
-
-        UString::BaseString* base = baseString();
-        if (base == this) {
-            if (m_sharedBuffer)
-                m_sharedBuffer->deref();
-            else
-                fastFree(base->buf);
-        } else
-            base->deref();
-
-        delete this;
-    }
-}
-
-// Golden ratio - arbitrary start value to avoid mapping all 0's to all 0's
-// or anything like that.
-const unsigned PHI = 0x9e3779b9U;
-
-// Paul Hsieh's SuperFastHash
-// http://www.azillionmonkeys.com/qed/hash.html
-unsigned UString::Rep::computeHash(const UChar* s, int len)
-{
-    unsigned l = len;
-    uint32_t hash = PHI;
-    uint32_t tmp;
-
-    int rem = l & 1;
-    l >>= 1;
-
-    // Main loop
-    for (; l > 0; l--) {
-        hash += s[0];
-        tmp = (s[1] << 11) ^ hash;
-        hash = (hash << 16) ^ tmp;
-        s += 2;
-        hash += hash >> 11;
-    }
-
-    // Handle end case
-    if (rem) {
-        hash += s[0];
-        hash ^= hash << 11;
-        hash += hash >> 17;
-    }
-
-    // Force "avalanching" of final 127 bits
-    hash ^= hash << 3;
-    hash += hash >> 5;
-    hash ^= hash << 2;
-    hash += hash >> 15;
-    hash ^= hash << 10;
-
-    // this avoids ever returning a hash code of 0, since that is used to
-    // signal "hash not computed yet", using a value that is likely to be
-    // effectively the same as 0 when the low bits are masked
-    if (hash == 0)
-        hash = 0x80000000;
-
-    return hash;
-}
-
-// Paul Hsieh's SuperFastHash
-// http://www.azillionmonkeys.com/qed/hash.html
-unsigned UString::Rep::computeHash(const char* s, int l)
-{
-    // This hash is designed to work on 16-bit chunks at a time. But since the normal case
-    // (above) is to hash UTF-16 characters, we just treat the 8-bit chars as if they
-    // were 16-bit chunks, which should give matching results
-
-    uint32_t hash = PHI;
-    uint32_t tmp;
-
-    size_t rem = l & 1;
-    l >>= 1;
-
-    // Main loop
-    for (; l > 0; l--) {
-        hash += static_cast<unsigned char>(s[0]);
-        tmp = (static_cast<unsigned char>(s[1]) << 11) ^ hash;
-        hash = (hash << 16) ^ tmp;
-        s += 2;
-        hash += hash >> 11;
-    }
-
-    // Handle end case
-    if (rem) {
-        hash += static_cast<unsigned char>(s[0]);
-        hash ^= hash << 11;
-        hash += hash >> 17;
-    }
-
-    // Force "avalanching" of final 127 bits
-    hash ^= hash << 3;
-    hash += hash >> 5;
-    hash ^= hash << 2;
-    hash += hash >> 15;
-    hash ^= hash << 10;
-
-    // this avoids ever returning a hash code of 0, since that is used to
-    // signal "hash not computed yet", using a value that is likely to be
-    // effectively the same as 0 when the low bits are masked
-    if (hash == 0)
-        hash = 0x80000000;
-
-    return hash;
-}
-
-#ifndef NDEBUG
-void UString::Rep::checkConsistency() const
-{
-    const UString::BaseString* base = baseString();
-
-    // There is no recursion for base strings.
-    ASSERT(base == base->baseString());
-
-    if (isStatic()) {
-        // There are only two static strings: null and empty.
-        ASSERT(!len);
-
-        // Static strings cannot get in identifier tables, because they are globally shared.
-        ASSERT(!identifierTable());
-    }
-
-    // The string fits in buffer.
-    ASSERT(base->usedPreCapacity <= base->preCapacity);
-    ASSERT(base->usedCapacity <= base->capacity);
-    ASSERT(-offset <= base->usedPreCapacity);
-    ASSERT(offset + len <= base->usedCapacity);
-}
-#endif
-
-UString::SharedUChar* UString::BaseString::sharedBuffer()
-{
-    if (!m_sharedBuffer)
-        setSharedBuffer(SharedUChar::create(new OwnFastMallocPtr<UChar>(buf)));
-    return m_sharedBuffer;
-}
-
-void UString::BaseString::setSharedBuffer(PassRefPtr<UString::SharedUChar> sharedBuffer)
-{
-    // The manual steps below are because m_sharedBuffer can't be a RefPtr. m_sharedBuffer
-    // is in a union with another variable to avoid making BaseString any larger.
-    if (m_sharedBuffer)
-        m_sharedBuffer->deref();
-    m_sharedBuffer = sharedBuffer.releaseRef();
-}
-
-bool UString::BaseString::slowIsBufferReadOnly()
-{
-    // The buffer may not be modified as soon as the underlying data has been shared with another class.
-    if (m_sharedBuffer->isShared())
-        return true;
-
-    // At this point, we know it that the underlying buffer isn't shared outside of this base class,
-    // so get rid of m_sharedBuffer.
-    OwnPtr<OwnFastMallocPtr<UChar> > mallocPtr(m_sharedBuffer->release());
-    UChar* unsharedBuf = const_cast<UChar*>(mallocPtr->release());
-    setSharedBuffer(0);
-    preCapacity += (buf - unsharedBuf);
-    buf = unsharedBuf;
-    return false;
-}
-
-// Put these early so they can be inlined.
-static inline size_t expandedSize(size_t capacitySize, size_t precapacitySize)
-{
-    // Combine capacitySize & precapacitySize to produce a single size to allocate,
-    // check that doing so does not result in overflow.
-    size_t size = capacitySize + precapacitySize;
-    if (size < capacitySize)
-        return overflowIndicator();
-
-    // Small Strings (up to 4 pages):
-    // Expand the allocation size to 112.5% of the amount requested.  This is largely sicking
-    // to our previous policy, however 112.5% is cheaper to calculate.
-    if (size < 0x4000) {
-        size_t expandedSize = ((size + (size >> 3)) | 15) + 1;
-        // Given the limited range within which we calculate the expansion in this
-        // fashion the above calculation should never overflow.
-        ASSERT(expandedSize >= size);
-        ASSERT(expandedSize < maxUChars());
-        return expandedSize;
-    }
-
-    // Medium Strings (up to 128 pages):
-    // For pages covering multiple pages over-allocation is less of a concern - any unused
-    // space will not be paged in if it is not used, so this is purely a VM overhead.  For
-    // these strings allocate 2x the requested size.
-    if (size < 0x80000) {
-        size_t expandedSize = ((size + size) | 0xfff) + 1;
-        // Given the limited range within which we calculate the expansion in this
-        // fashion the above calculation should never overflow.
-        ASSERT(expandedSize >= size);
-        ASSERT(expandedSize < maxUChars());
-        return expandedSize;
-    }
-
-    // Large Strings (to infinity and beyond!):
-    // Revert to our 112.5% policy - probably best to limit the amount of unused VM we allow
-    // any individual string be responsible for.
-    size_t expandedSize = ((size + (size >> 3)) | 0xfff) + 1;
-
-    // Check for overflow - any result that is at least as large as requested (but
-    // still below the limit) is okay.
-    if ((expandedSize >= size) && (expandedSize < maxUChars()))
-        return expandedSize;
-    return overflowIndicator();
-}
-
-static inline bool expandCapacity(UString::Rep* rep, int requiredLength)
-{
-    rep->checkConsistency();
-    ASSERT(!rep->baseString()->isBufferReadOnly());
-
-    UString::BaseString* base = rep->baseString();
-
-    if (requiredLength > base->capacity) {
-        size_t newCapacity = expandedSize(requiredLength, base->preCapacity);
-        UChar* oldBuf = base->buf;
-        if (!reallocChars(base->buf, newCapacity).getValue(base->buf)) {
-            base->buf = oldBuf;
-            return false;
-        }
-        base->capacity = newCapacity - base->preCapacity;
-    }
-    if (requiredLength > base->usedCapacity)
-        base->usedCapacity = requiredLength;
-
-    rep->checkConsistency();
-    return true;
-}
-
-bool UString::Rep::reserveCapacity(int capacity)
-{
-    // If this is an empty string there is no point 'growing' it - just allocate a new one.
-    // If the BaseString is shared with another string that is using more capacity than this
-    // string is, then growing the buffer won't help.
-    // If the BaseString's buffer is readonly, then it isn't allowed to grow.
-    UString::BaseString* base = baseString();
-    if (!base->buf || !base->capacity || (offset + len) != base->usedCapacity || base->isBufferReadOnly())
-        return false;
-    
-    // If there is already sufficient capacity, no need to grow!
-    if (capacity <= base->capacity)
-        return true;
-
-    checkConsistency();
-
-    size_t newCapacity = expandedSize(capacity, base->preCapacity);
-    UChar* oldBuf = base->buf;
-    if (!reallocChars(base->buf, newCapacity).getValue(base->buf)) {
-        base->buf = oldBuf;
-        return false;
-    }
-    base->capacity = newCapacity - base->preCapacity;
-
-    checkConsistency();
-    return true;
-}
-
-void UString::expandCapacity(int requiredLength)
-{
-    if (!JSC::expandCapacity(m_rep.get(), requiredLength))
-        makeNull();
-}
-
-void UString::expandPreCapacity(int requiredPreCap)
-{
-    m_rep->checkConsistency();
-    ASSERT(!m_rep->baseString()->isBufferReadOnly());
-
-    BaseString* base = m_rep->baseString();
-
-    if (requiredPreCap > base->preCapacity) {
-        size_t newCapacity = expandedSize(requiredPreCap, base->capacity);
-        int delta = newCapacity - base->capacity - base->preCapacity;
-
-        UChar* newBuf;
-        if (!allocChars(newCapacity).getValue(newBuf)) {
-            makeNull();
-            return;
-        }
-        copyChars(newBuf + delta, base->buf, base->capacity + base->preCapacity);
-        fastFree(base->buf);
-        base->buf = newBuf;
+    if (!c[0])
+        return &UString::Rep::empty();
 
-        base->preCapacity = newCapacity - base->capacity;
-    }
-    if (requiredPreCap > base->usedPreCapacity)
-        base->usedPreCapacity = requiredPreCap;
+    size_t length = strlen(c);
+    UChar* d;
+    PassRefPtr<UStringImpl> result = UStringImpl::tryCreateUninitialized(length, d);
+    if (!result)
+        return &UString::Rep::null();
 
-    m_rep->checkConsistency();
+    for (size_t i = 0; i < length; i++)
+        d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
+    return result;
 }
 
-static PassRefPtr<UString::Rep> createRep(const char* c)
+static inline PassRefPtr<UString::Rep> createRep(const char* c, int length)
 {
     if (!c)
         return &UString::Rep::null();
 
-    if (!c[0])
+    if (!length)
         return &UString::Rep::empty();
 
-    size_t length = strlen(c);
     UChar* d;
-    if (!allocChars(length).getValue(d))
+    PassRefPtr<UStringImpl> result = UStringImpl::tryCreateUninitialized(length, d);
+    if (!result)
         return &UString::Rep::null();
-    else {
-        for (size_t i = 0; i < length; i++)
-            d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
-        return UString::Rep::create(d, static_cast<int>(length));
-    }
 
+    for (int i = 0; i < length; i++)
+        d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
+    return result;
 }
 
 UString::UString(const char* c)
@@ -583,335 +202,31 @@ UString::UString(const char* c)
 {
 }
 
-UString::UString(const UChar* c, int length)
+UString::UString(const char* c, int length)
+    : m_rep(createRep(c, length))
 {
-    if (length == 0) 
-        m_rep = &Rep::empty();
-    else
-        m_rep = Rep::createCopying(c, length);
 }
 
-UString::UString(UChar* c, int length, bool copy)
+UString::UString(const UChar* c, int length)
 {
-    if (length == 0)
+    if (length == 0) 
         m_rep = &Rep::empty();
-    else if (copy)
-        m_rep = Rep::createCopying(c, length);
     else
         m_rep = Rep::create(c, length);
 }
 
-UString::UString(const Vector<UChar>& buffer)
-{
-    if (!buffer.size())
-        m_rep = &Rep::empty();
-    else
-        m_rep = Rep::createCopying(buffer.data(), buffer.size());
-}
-
-static ALWAYS_INLINE int newCapacityWithOverflowCheck(const int currentCapacity, const int extendLength, const bool plusOne = false)
-{
-    ASSERT_WITH_MESSAGE(extendLength >= 0, "extendedLength = %d", extendLength);
-
-    const int plusLength = plusOne ? 1 : 0;
-    if (currentCapacity > std::numeric_limits<int>::max() - extendLength - plusLength)
-        CRASH();
-
-    return currentCapacity + extendLength + plusLength;
-}
-
-static ALWAYS_INLINE PassRefPtr<UString::Rep> concatenate(PassRefPtr<UString::Rep> r, const UChar* tData, int tSize)
-{
-    RefPtr<UString::Rep> rep = r;
-
-    rep->checkConsistency();
-
-    int thisSize = rep->size();
-    int thisOffset = rep->offset;
-    int length = thisSize + tSize;
-    UString::BaseString* base = rep->baseString();
-
-    // possible cases:
-    if (tSize == 0) {
-        // t is empty
-    } else if (thisSize == 0) {
-        // this is empty
-        rep = UString::Rep::createCopying(tData, tSize);
-    } else if (rep == base && !base->isShared()) {
-        // this is direct and has refcount of 1 (so we can just alter it directly)
-        if (!expandCapacity(rep.get(), newCapacityWithOverflowCheck(thisOffset, length)))
-            rep = &UString::Rep::null();
-        if (rep->data()) {
-            copyChars(rep->data() + thisSize, tData, tSize);
-            rep->len = length;
-            rep->_hash = 0;
-        }
-    } else if (thisOffset + thisSize == base->usedCapacity && thisSize >= minShareSize && !base->isBufferReadOnly()) {
-        // this reaches the end of the buffer - extend it if it's long enough to append to
-        if (!expandCapacity(rep.get(), newCapacityWithOverflowCheck(thisOffset, length)))
-            rep = &UString::Rep::null();
-        if (rep->data()) {
-            copyChars(rep->data() + thisSize, tData, tSize);
-            rep = UString::Rep::create(rep, 0, length);
-        }
-    } else {
-        // This is shared in some way that prevents us from modifying base, so we must make a whole new string.
-        size_t newCapacity = expandedSize(length, 0);
-        UChar* d;
-        if (!allocChars(newCapacity).getValue(d))
-            rep = &UString::Rep::null();
-        else {
-            copyChars(d, rep->data(), thisSize);
-            copyChars(d + thisSize, tData, tSize);
-            rep = UString::Rep::create(d, length);
-            rep->baseString()->capacity = newCapacity;
-        }
-    }
-
-    rep->checkConsistency();
-
-    return rep.release();
-}
-
-static ALWAYS_INLINE PassRefPtr<UString::Rep> concatenate(PassRefPtr<UString::Rep> r, const char* t)
-{
-    RefPtr<UString::Rep> rep = r;
-
-    rep->checkConsistency();
-
-    int thisSize = rep->size();
-    int thisOffset = rep->offset;
-    int tSize = static_cast<int>(strlen(t));
-    int length = thisSize + tSize;
-    UString::BaseString* base = rep->baseString();
-
-    // possible cases:
-    if (thisSize == 0) {
-        // this is empty
-        rep = createRep(t);
-    } else if (tSize == 0) {
-        // t is empty, we'll just return *this below.
-    } else if (rep == base && !base->isShared()) {
-        // this is direct and has refcount of 1 (so we can just alter it directly)
-        expandCapacity(rep.get(), newCapacityWithOverflowCheck(thisOffset, length));
-        UChar* d = rep->data();
-        if (d) {
-            for (int i = 0; i < tSize; ++i)
-                d[thisSize + i] = static_cast<unsigned char>(t[i]); // use unsigned char to zero-extend instead of sign-extend
-            rep->len = length;
-            rep->_hash = 0;
-        }
-    } else if (thisOffset + thisSize == base->usedCapacity && thisSize >= minShareSize && !base->isBufferReadOnly()) {
-        // this string reaches the end of the buffer - extend it
-        expandCapacity(rep.get(), newCapacityWithOverflowCheck(thisOffset, length));
-        UChar* d = rep->data();
-        if (d) {
-            for (int i = 0; i < tSize; ++i)
-                d[thisSize + i] = static_cast<unsigned char>(t[i]); // use unsigned char to zero-extend instead of sign-extend
-            rep = UString::Rep::create(rep, 0, length);
-        }
-    } else {
-        // This is shared in some way that prevents us from modifying base, so we must make a whole new string.
-        size_t newCapacity = expandedSize(length, 0);
-        UChar* d;
-        if (!allocChars(newCapacity).getValue(d))
-            rep = &UString::Rep::null();
-        else {
-            copyChars(d, rep->data(), thisSize);
-            for (int i = 0; i < tSize; ++i)
-                d[thisSize + i] = static_cast<unsigned char>(t[i]); // use unsigned char to zero-extend instead of sign-extend
-            rep = UString::Rep::create(d, length);
-            rep->baseString()->capacity = newCapacity;
-        }
-    }
-
-    rep->checkConsistency();
-
-    return rep.release();
-}
-
-PassRefPtr<UString::Rep> concatenate(UString::Rep* a, UString::Rep* b)
-{
-    a->checkConsistency();
-    b->checkConsistency();
-
-    int aSize = a->size();
-    int bSize = b->size();
-    int aOffset = a->offset;
-
-    // possible cases:
-
-    UString::BaseString* aBase = a->baseString();
-    if (bSize == 1 && aOffset + aSize == aBase->usedCapacity && aOffset + aSize < aBase->capacity && !aBase->isBufferReadOnly()) {
-        // b is a single character (common fast case)
-        ++aBase->usedCapacity;
-        a->data()[aSize] = b->data()[0];
-        return UString::Rep::create(a, 0, aSize + 1);
-    }
-
-    // a is empty
-    if (aSize == 0)
-        return b;
-    // b is empty
-    if (bSize == 0)
-        return a;
-
-    int bOffset = b->offset;
-    int length = aSize + bSize;
-
-    UString::BaseString* bBase = b->baseString();
-    if (aOffset + aSize == aBase->usedCapacity && aSize >= minShareSize && 4 * aSize >= bSize
-        && (-bOffset != bBase->usedPreCapacity || aSize >= bSize) && !aBase->isBufferReadOnly()) {
-        // - a reaches the end of its buffer so it qualifies for shared append
-        // - also, it's at least a quarter the length of b - appending to a much shorter
-        //   string does more harm than good
-        // - however, if b qualifies for prepend and is longer than a, we'd rather prepend
-        
-        UString x(a);
-        x.expandCapacity(newCapacityWithOverflowCheck(aOffset, length));
-        if (!a->data() || !x.data())
-            return 0;
-        copyChars(a->data() + aSize, b->data(), bSize);
-        PassRefPtr<UString::Rep> result = UString::Rep::create(a, 0, length);
-
-        a->checkConsistency();
-        b->checkConsistency();
-        result->checkConsistency();
-
-        return result;
-    }
-
-    if (-bOffset == bBase->usedPreCapacity && bSize >= minShareSize && 4 * bSize >= aSize && !bBase->isBufferReadOnly()) {
-        // - b reaches the beginning of its buffer so it qualifies for shared prepend
-        // - also, it's at least a quarter the length of a - prepending to a much shorter
-        //   string does more harm than good
-        UString y(b);
-        y.expandPreCapacity(-bOffset + aSize);
-        if (!b->data() || !y.data())
-            return 0;
-        copyChars(b->data() - aSize, a->data(), aSize);
-        PassRefPtr<UString::Rep> result = UString::Rep::create(b, -aSize, length);
-
-        a->checkConsistency();
-        b->checkConsistency();
-        result->checkConsistency();
-
-        return result;
-    }
-
-    // a does not qualify for append, and b does not qualify for prepend, gotta make a whole new string
-    size_t newCapacity = expandedSize(length, 0);
-    UChar* d;
-    if (!allocChars(newCapacity).getValue(d))
-        return 0;
-    copyChars(d, a->data(), aSize);
-    copyChars(d + aSize, b->data(), bSize);
-    PassRefPtr<UString::Rep> result = UString::Rep::create(d, length);
-    result->baseString()->capacity = newCapacity;
-
-    a->checkConsistency();
-    b->checkConsistency();
-    result->checkConsistency();
-
-    return result;
-}
-
-PassRefPtr<UString::Rep> concatenate(UString::Rep* rep, int i)
-{
-    UChar buf[1 + sizeof(i) * 3];
-    UChar* end = buf + sizeof(buf) / sizeof(UChar);
-    UChar* p = end;
-  
-    if (i == 0)
-        *--p = '0';
-    else if (i == INT_MIN) {
-        char minBuf[1 + sizeof(i) * 3];
-        sprintf(minBuf, "%d", INT_MIN);
-        return concatenate(rep, minBuf);
-    } else {
-        bool negative = false;
-        if (i < 0) {
-            negative = true;
-            i = -i;
-        }
-        while (i) {
-            *--p = static_cast<unsigned short>((i % 10) + '0');
-            i /= 10;
-        }
-        if (negative)
-            *--p = '-';
-    }
-
-    return concatenate(rep, p, static_cast<int>(end - p));
-
-}
-
-PassRefPtr<UString::Rep> concatenate(UString::Rep* rep, double d)
+UString UString::createFromUTF8(const char* string)
 {
-    // avoid ever printing -NaN, in JS conceptually there is only one NaN value
-    if (isnan(d))
-        return concatenate(rep, "NaN");
-
-    if (d == 0.0) // stringify -0 as 0
-        d = 0.0;
+    if (!string)
+        return null();
 
-    char buf[80];
-    int decimalPoint;
-    int sign;
+    size_t length = strlen(string);
+    Vector<UChar, 1024> buffer(length);
+    UChar* p = buffer.data();
+    if (conversionOK != convertUTF8ToUTF16(&string, string + length, &p, p + length))
+        return null();
 
-    char result[80];
-    WTF::dtoa(result, d, 0, &decimalPoint, &sign, NULL);
-    int length = static_cast<int>(strlen(result));
-  
-    int i = 0;
-    if (sign)
-        buf[i++] = '-';
-  
-    if (decimalPoint <= 0 && decimalPoint > -6) {
-        buf[i++] = '0';
-        buf[i++] = '.';
-        for (int j = decimalPoint; j < 0; j++)
-            buf[i++] = '0';
-        strcpy(buf + i, result);
-    } else if (decimalPoint <= 21 && decimalPoint > 0) {
-        if (length <= decimalPoint) {
-            strcpy(buf + i, result);
-            i += length;
-            for (int j = 0; j < decimalPoint - length; j++)
-                buf[i++] = '0';
-            buf[i] = '\0';
-        } else {
-            strncpy(buf + i, result, decimalPoint);
-            i += decimalPoint;
-            buf[i++] = '.';
-            strcpy(buf + i, result + decimalPoint);
-        }
-    } else if (result[0] < '0' || result[0] > '9')
-        strcpy(buf + i, result);
-    else {
-        buf[i++] = result[0];
-        if (length > 1) {
-            buf[i++] = '.';
-            strcpy(buf + i, result + 1);
-            i += length - 1;
-        }
-        
-        buf[i++] = 'e';
-        buf[i++] = (decimalPoint >= 0) ? '+' : '-';
-        // decimalPoint can't be more than 3 digits decimal given the
-        // nature of float representation
-        int exponential = decimalPoint - 1;
-        if (exponential < 0)
-            exponential = -exponential;
-        if (exponential >= 100)
-            buf[i++] = static_cast<char>('0' + exponential / 100);
-        if (exponential >= 10)
-            buf[i++] = static_cast<char>('0' + (exponential % 100) / 10);
-        buf[i++] = static_cast<char>('0' + exponential % 10);
-        buf[i++] = '\0';
-    }
-    
-    return concatenate(rep, buf);
+    return UString(buffer.data(), p - buffer.data());
 }
 
 UString UString::from(int i)
@@ -953,7 +268,7 @@ UString UString::from(long long i)
         *--p = '0';
     else if (i == std::numeric_limits<long long>::min()) {
         char minBuf[1 + sizeof(i) * 3];
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
         snprintf(minBuf, sizeof(minBuf) - 1, "%I64d", std::numeric_limits<long long>::min());
 #else
         snprintf(minBuf, sizeof(minBuf) - 1, "%lld", std::numeric_limits<long long>::min());
@@ -1025,69 +340,10 @@ UString UString::from(long l)
 
 UString UString::from(double d)
 {
-    // avoid ever printing -NaN, in JS conceptually there is only one NaN value
-    if (isnan(d))
-        return "NaN";
-    if (!d)
-        return "0"; // -0 -> "0"
-
-    char buf[80];
-    int decimalPoint;
-    int sign;
-    
-    char result[80];
-    WTF::dtoa(result, d, 0, &decimalPoint, &sign, NULL);
-    int length = static_cast<int>(strlen(result));
-  
-    int i = 0;
-    if (sign)
-        buf[i++] = '-';
-  
-    if (decimalPoint <= 0 && decimalPoint > -6) {
-        buf[i++] = '0';
-        buf[i++] = '.';
-        for (int j = decimalPoint; j < 0; j++)
-            buf[i++] = '0';
-        strcpy(buf + i, result);
-    } else if (decimalPoint <= 21 && decimalPoint > 0) {
-        if (length <= decimalPoint) {
-            strcpy(buf + i, result);
-            i += length;
-            for (int j = 0; j < decimalPoint - length; j++)
-                buf[i++] = '0';
-            buf[i] = '\0';
-        } else {
-            strncpy(buf + i, result, decimalPoint);
-            i += decimalPoint;
-            buf[i++] = '.';
-            strcpy(buf + i, result + decimalPoint);
-        }
-    } else if (result[0] < '0' || result[0] > '9')
-        strcpy(buf + i, result);
-    else {
-        buf[i++] = result[0];
-        if (length > 1) {
-            buf[i++] = '.';
-            strcpy(buf + i, result + 1);
-            i += length - 1;
-        }
-        
-        buf[i++] = 'e';
-        buf[i++] = (decimalPoint >= 0) ? '+' : '-';
-        // decimalPoint can't be more than 3 digits decimal given the
-        // nature of float representation
-        int exponential = decimalPoint - 1;
-        if (exponential < 0)
-            exponential = -exponential;
-        if (exponential >= 100)
-            buf[i++] = static_cast<char>('0' + exponential / 100);
-        if (exponential >= 10)
-            buf[i++] = static_cast<char>('0' + (exponential % 100) / 10);
-        buf[i++] = static_cast<char>('0' + exponential % 10);
-        buf[i++] = '\0';
-    }
-    
-    return UString(buf);
+    DtoaBuffer buffer;
+    unsigned length;
+    doubleToStringInJavaScriptFormat(d, buffer, &length);
+    return UString(buffer, length);
 }
 
 UString UString::spliceSubstringsWithSeparators(const Range* substringRanges, int rangeCount, const UString* separators, int separatorCount) const
@@ -1113,23 +369,24 @@ UString UString::spliceSubstringsWithSeparators(const Range* substringRanges, in
         return "";
 
     UChar* buffer;
-    if (!allocChars(totalLength).getValue(buffer))
+    PassRefPtr<Rep> rep = Rep::tryCreateUninitialized(totalLength, buffer);
+    if (!rep)
         return null();
 
     int maxCount = max(rangeCount, separatorCount);
     int bufferPos = 0;
     for (int i = 0; i < maxCount; i++) {
         if (i < rangeCount) {
-            copyChars(buffer + bufferPos, data() + substringRanges[i].position, substringRanges[i].length);
+            UStringImpl::copyChars(buffer + bufferPos, data() + substringRanges[i].position, substringRanges[i].length);
             bufferPos += substringRanges[i].length;
         }
         if (i < separatorCount) {
-            copyChars(buffer + bufferPos, separators[i].data(), separators[i].size());
+            UStringImpl::copyChars(buffer + bufferPos, separators[i].data(), separators[i].size());
             bufferPos += separators[i].size();
         }
     }
 
-    return UString::Rep::create(buffer, totalLength);
+    return rep;
 }
 
 UString UString::replaceRange(int rangeStart, int rangeLength, const UString& replacement) const
@@ -1142,136 +399,16 @@ UString UString::replaceRange(int rangeStart, int rangeLength, const UString& re
         return "";
 
     UChar* buffer;
-    if (!allocChars(totalLength).getValue(buffer))
+    PassRefPtr<Rep> rep = Rep::tryCreateUninitialized(totalLength, buffer);
+    if (!rep)
         return null();
 
-    copyChars(buffer, data(), rangeStart);
-    copyChars(buffer + rangeStart, replacement.data(), replacementLength);
+    UStringImpl::copyChars(buffer, data(), rangeStart);
+    UStringImpl::copyChars(buffer + rangeStart, replacement.data(), replacementLength);
     int rangeEnd = rangeStart + rangeLength;
-    copyChars(buffer + rangeStart + replacementLength, data() + rangeEnd, size() - rangeEnd);
-
-    return UString::Rep::create(buffer, totalLength);
-}
-
-
-UString& UString::append(const UString &t)
-{
-    m_rep->checkConsistency();
-    t.rep()->checkConsistency();
-
-    int thisSize = size();
-    int thisOffset = m_rep->offset;
-    int tSize = t.size();
-    int length = thisSize + tSize;
-    BaseString* base = m_rep->baseString();
-
-    // possible cases:
-    if (thisSize == 0) {
-        // this is empty
-        *this = t;
-    } else if (tSize == 0) {
-        // t is empty
-    } else if (m_rep == base && !base->isShared()) {
-        // this is direct and has refcount of 1 (so we can just alter it directly)
-        expandCapacity(newCapacityWithOverflowCheck(thisOffset, length));
-        if (data()) {
-            copyChars(m_rep->data() + thisSize, t.data(), tSize);
-            m_rep->len = length;
-            m_rep->_hash = 0;
-        }
-    } else if (thisOffset + thisSize == base->usedCapacity && thisSize >= minShareSize && !base->isBufferReadOnly()) {
-        // this reaches the end of the buffer - extend it if it's long enough to append to
-        expandCapacity(newCapacityWithOverflowCheck(thisOffset, length));
-        if (data()) {
-            copyChars(m_rep->data() + thisSize, t.data(), tSize);
-            m_rep = Rep::create(m_rep, 0, length);
-        }
-    } else {
-        // This is shared in some way that prevents us from modifying base, so we must make a whole new string.
-        size_t newCapacity = expandedSize(length, 0);
-        UChar* d;
-        if (!allocChars(newCapacity).getValue(d))
-            makeNull();
-        else {
-            copyChars(d, data(), thisSize);
-            copyChars(d + thisSize, t.data(), tSize);
-            m_rep = Rep::create(d, length);
-            m_rep->baseString()->capacity = newCapacity;
-        }
-    }
-
-    m_rep->checkConsistency();
-    t.rep()->checkConsistency();
-
-    return *this;
-}
-
-UString& UString::append(const UChar* tData, int tSize)
-{
-    m_rep = concatenate(m_rep.release(), tData, tSize);
-    return *this;
-}
-
-UString& UString::append(const char* t)
-{
-    m_rep = concatenate(m_rep.release(), t);
-    return *this;
-}
-
-UString& UString::append(UChar c)
-{
-    m_rep->checkConsistency();
+    UStringImpl::copyChars(buffer + rangeStart + replacementLength, data() + rangeEnd, size() - rangeEnd);
 
-    int thisOffset = m_rep->offset;
-    int length = size();
-    BaseString* base = m_rep->baseString();
-
-    // possible cases:
-    if (length == 0) {
-        // this is empty - must make a new m_rep because we don't want to pollute the shared empty one 
-        size_t newCapacity = expandedSize(1, 0);
-        UChar* d;
-        if (!allocChars(newCapacity).getValue(d))
-            makeNull();
-        else {
-            d[0] = c;
-            m_rep = Rep::create(d, 1);
-            m_rep->baseString()->capacity = newCapacity;
-        }
-    } else if (m_rep == base && !base->isShared()) {
-        // this is direct and has refcount of 1 (so we can just alter it directly)
-        expandCapacity(newCapacityWithOverflowCheck(thisOffset, length, true));
-        UChar* d = m_rep->data();
-        if (d) {
-            d[length] = c;
-            m_rep->len = length + 1;
-            m_rep->_hash = 0;
-        }
-    } else if (thisOffset + length == base->usedCapacity && length >= minShareSize && !base->isBufferReadOnly()) {
-        // this reaches the end of the string - extend it and share
-        expandCapacity(newCapacityWithOverflowCheck(thisOffset, length, true));
-        UChar* d = m_rep->data();
-        if (d) {
-            d[length] = c;
-            m_rep = Rep::create(m_rep, 0, length + 1);
-        }
-    } else {
-        // This is shared in some way that prevents us from modifying base, so we must make a whole new string.
-        size_t newCapacity = expandedSize(length + 1, 0);
-        UChar* d;
-        if (!allocChars(newCapacity).getValue(d))
-            makeNull();
-        else {
-            copyChars(d, data(), length);
-            d[length] = c;
-            m_rep = Rep::create(d, length + 1);
-            m_rep->baseString()->capacity = newCapacity;
-        }
-    }
-
-    m_rep->checkConsistency();
-
-    return *this;
+    return rep;
 }
 
 bool UString::getCString(CStringBuffer& buffer) const
@@ -1299,13 +436,15 @@ bool UString::getCString(CStringBuffer& buffer) const
 
 char* UString::ascii() const
 {
+    static char* asciiBuffer = 0;
+
     int length = size();
     int neededSize = length + 1;
-    delete[] statBuffer;
-    statBuffer = new char[neededSize];
+    delete[] asciiBuffer;
+    asciiBuffer = new char[neededSize];
 
     const UChar* p = data();
-    char* q = statBuffer;
+    char* q = asciiBuffer;
     const UChar* limit = p + length;
     while (p != limit) {
         *q = static_cast<char>(p[0]);
@@ -1314,7 +453,7 @@ char* UString::ascii() const
     }
     *q = '\0';
 
-    return statBuffer;
+    return asciiBuffer;
 }
 
 UString& UString::operator=(const char* c)
@@ -1330,21 +469,13 @@ UString& UString::operator=(const char* c)
     }
 
     int l = static_cast<int>(strlen(c));
-    UChar* d;
-    BaseString* base = m_rep->baseString();
-    if (!base->isShared() && l <= base->capacity && m_rep == base && m_rep->offset == 0 && base->preCapacity == 0) {
-        d = base->buf;
-        m_rep->_hash = 0;
-        m_rep->len = l;
-    } else {
-        if (!allocChars(l).getValue(d)) {
-            makeNull();
-            return *this;
-        }
-        m_rep = Rep::create(d, l);
-    }
-    for (int i = 0; i < l; i++)
-        d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
+    UChar* d = 0;
+    m_rep = Rep::tryCreateUninitialized(l, d);
+    if (m_rep) {
+        for (int i = 0; i < l; i++)
+            d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
+    } else
+        makeNull();
 
     return *this;
 }
@@ -1502,7 +633,7 @@ uint32_t UString::toStrictUInt32(bool* ok) const
         *ok = false;
 
     // Empty string is not OK.
-    int len = m_rep->len;
+    int len = m_rep->size();
     if (len == 0)
         return 0;
     const UChar* p = m_rep->data();
@@ -1727,10 +858,15 @@ int compare(const UString& s1, const UString& s2)
     return (l1 > l2) ? 1 : -1;
 }
 
+#if OS(SOLARIS) && COMPILER(SUNCC)
+// Signature must match that of UStringImpl.h, otherwise the linker complains about undefined symbol.
+bool equal(const UStringImpl* r, const UStringImpl* b)
+#else
 bool equal(const UString::Rep* r, const UString::Rep* b)
+#endif
 {
-    int length = r->len;
-    if (length != b->len)
+    int length = r->size();
+    if (length != b->size())
         return false;
     const UChar* d = r->data();
     const UChar* s = b->data();
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.h
index 58c3615..307ce68 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UString.h
@@ -24,6 +24,7 @@
 #define UString_h
 
 #include "Collector.h"
+#include "UStringImpl.h"
 #include <stdint.h>
 #include <string.h>
 #include <wtf/Assertions.h>
@@ -40,8 +41,6 @@ namespace JSC {
     using WTF::PlacementNewAdoptType;
     using WTF::PlacementNewAdopt;
 
-    class IdentifierTable;
-  
     class CString {
     public:
         CString()
@@ -71,192 +70,58 @@ namespace JSC {
         char* m_data;
     };
 
+    bool operator==(const CString&, const CString&);
+
     typedef Vector<char, 32> CStringBuffer;
 
     class UString {
         friend class JIT;
 
     public:
+#if PLATFORM(QT)
+        operator QString() const
+        {
+            return QString(reinterpret_cast<const QChar*>(this->data()), this->size());
+        }
 
-        typedef CrossThreadRefCounted<OwnFastMallocPtr<UChar> > SharedUChar;
-        struct BaseString;
-        struct Rep : Noncopyable {
-            friend class JIT;
-
-            static PassRefPtr<Rep> create(UChar* buffer, int length)
-            {
-                return adoptRef(new BaseString(buffer, length));
-            }
-
-            static PassRefPtr<Rep> createEmptyBuffer(size_t size)
-            {
-                // Guard against integer overflow
-                if (size < (std::numeric_limits<size_t>::max() / sizeof(UChar))) {
-                    void* buf = 0;
-                    if (tryFastMalloc(size * sizeof(UChar)).getValue(buf))
-                        return adoptRef(new BaseString(static_cast<UChar*>(buf), 0, size));
-                }
-                return adoptRef(new BaseString(0, 0, 0));
-            }
-
-            static PassRefPtr<Rep> createCopying(const UChar*, int);
-            static PassRefPtr<Rep> create(PassRefPtr<Rep> base, int offset, int length);
-
-            // Constructs a string from a UTF-8 string, using strict conversion (see comments in UTF8.h).
-            // Returns UString::Rep::null for null input or conversion failure.
-            static PassRefPtr<Rep> createFromUTF8(const char*);
-
-            // Uses SharedUChar to have joint ownership over the UChar*.
-            static PassRefPtr<Rep> create(UChar*, int, PassRefPtr<SharedUChar>);
-
-            SharedUChar* sharedBuffer();
-            void destroy();
-
-            bool baseIsSelf() const { return m_identifierTableAndFlags.isFlagSet(BaseStringFlag); }
-            UChar* data() const;
-            int size() const { return len; }
-
-            unsigned hash() const { if (_hash == 0) _hash = computeHash(data(), len); return _hash; }
-            unsigned computedHash() const { ASSERT(_hash); return _hash; } // fast path for Identifiers
-
-            static unsigned computeHash(const UChar*, int length);
-            static unsigned computeHash(const char*, int length);
-            static unsigned computeHash(const char* s) { return computeHash(s, strlen(s)); }
-
-            IdentifierTable* identifierTable() const { return m_identifierTableAndFlags.get(); }
-            void setIdentifierTable(IdentifierTable* table) { ASSERT(!isStatic()); m_identifierTableAndFlags.set(table); }
-
-            bool isStatic() const { return m_identifierTableAndFlags.isFlagSet(StaticFlag); }
-            void setStatic(bool);
-            void setBaseString(PassRefPtr<BaseString>);
-            BaseString* baseString();
-            const BaseString* baseString() const;
-
-            Rep* ref() { ++rc; return this; }
-            ALWAYS_INLINE void deref() { if (--rc == 0) destroy(); }
-
-            void checkConsistency() const;
-            enum UStringFlags {
-                StaticFlag,
-                BaseStringFlag
-            };
-
-            // unshared data
-            int offset;
-            int len;
-            int rc; // For null and empty static strings, this field does not reflect a correct count, because ref/deref are not thread-safe. A special case in destroy() guarantees that these do not get deleted.
-            mutable unsigned _hash;
-            PtrAndFlags<IdentifierTable, UStringFlags> m_identifierTableAndFlags;
-
-            static BaseString& null() { return *nullBaseString; }
-            static BaseString& empty() { return *emptyBaseString; }
-
-            bool reserveCapacity(int capacity);
-
-        protected:
-            // Constructor for use by BaseString subclass; they use the union with m_baseString for another purpose.
-            Rep(int length)
-                : offset(0)
-                , len(length)
-                , rc(1)
-                , _hash(0)
-                , m_baseString(0)
-            {
-            }
-
-            Rep(PassRefPtr<BaseString> base, int offsetInBase, int length)
-                : offset(offsetInBase)
-                , len(length)
-                , rc(1)
-                , _hash(0)
-                , m_baseString(base.releaseRef())
-            {
-                checkConsistency();
-            }
-
-            union {
-                // If !baseIsSelf()
-                BaseString* m_baseString;
-                // If baseIsSelf()
-                SharedUChar* m_sharedBuffer;
-            };
-
-        private:
-            // For SmallStringStorage which allocates an array and does initialization manually.
-            Rep() { }
-
-            friend class SmallStringsStorage;
-            friend void initializeUString();
-            JS_EXPORTDATA static BaseString* nullBaseString;
-            JS_EXPORTDATA static BaseString* emptyBaseString;
-        };
-
-
-        struct BaseString : public Rep {
-            bool isShared() { return rc != 1 || isBufferReadOnly(); }
-            void setSharedBuffer(PassRefPtr<SharedUChar>);
-
-            bool isBufferReadOnly()
-            {
-                if (!m_sharedBuffer)
-                    return false;
-                return slowIsBufferReadOnly();
-            }
-
-            // potentially shared data.
-            UChar* buf;
-            int preCapacity;
-            int usedPreCapacity;
-            int capacity;
-            int usedCapacity;
-
-            size_t reportedCost;
-
-        private:
-            BaseString(UChar* buffer, int length, int additionalCapacity = 0)
-                : Rep(length)
-                , buf(buffer)
-                , preCapacity(0)
-                , usedPreCapacity(0)
-                , capacity(length + additionalCapacity)
-                , usedCapacity(length)
-                , reportedCost(0)
-            {
-                m_identifierTableAndFlags.setFlag(BaseStringFlag);
-                checkConsistency();
-            }
-
-            SharedUChar* sharedBuffer();
-            bool slowIsBufferReadOnly();
-
-            friend struct Rep;
-            friend class SmallStringsStorage;
-            friend void initializeUString();
-        };
-
+        UString(const QString& str)
+        {
+            *this = JSC::UString(reinterpret_cast<const UChar*>(str.constData()), str.length());
+        }
+#endif
+        typedef UStringImpl Rep;
+    
     public:
+        // UString constructors passed char*s assume ISO Latin-1 encoding; for UTF8 use 'createFromUTF8', below.
         UString();
-        UString(const char*);
+        UString(const char*); // Constructor for null-terminated string.
+        UString(const char*, int length);
         UString(const UChar*, int length);
-        UString(UChar*, int length, bool copy);
+        UString(const Vector<UChar>& buffer);
 
         UString(const UString& s)
             : m_rep(s.m_rep)
         {
         }
 
-        UString(const Vector<UChar>& buffer);
+        // Special constructor for cases where we overwrite an object in place.
+        UString(PlacementNewAdoptType)
+            : m_rep(PlacementNewAdopt)
+        {
+        }
 
         ~UString()
         {
         }
 
-        // Special constructor for cases where we overwrite an object in place.
-        UString(PlacementNewAdoptType)
-            : m_rep(PlacementNewAdopt)
+        template<size_t inlineCapacity>
+        static PassRefPtr<UStringImpl> adopt(Vector<UChar, inlineCapacity>& vector)
         {
+            return Rep::adopt(vector);
         }
 
+        static UString createFromUTF8(const char*);
+
         static UString from(int);
         static UString from(long long);
         static UString from(unsigned int);
@@ -283,12 +148,6 @@ namespace JSC {
 
         UString replaceRange(int rangeStart, int RangeEnd, const UString& replacement) const;
 
-        UString& append(const UString&);
-        UString& append(const char*);
-        UString& append(UChar);
-        UString& append(char c) { return append(static_cast<UChar>(static_cast<unsigned char>(c))); }
-        UString& append(const UChar*, int size);
-
         bool getCString(CStringBuffer&) const;
 
         // NOTE: This method should only be used for *debugging* purposes as it
@@ -307,13 +166,10 @@ namespace JSC {
 
         UString& operator=(const char*c);
 
-        UString& operator+=(const UString& s) { return append(s); }
-        UString& operator+=(const char* s) { return append(s); }
-
         const UChar* data() const { return m_rep->data(); }
 
-        bool isNull() const { return (m_rep == &Rep::null()); }
-        bool isEmpty() const { return (!m_rep->len); }
+        bool isNull() const { return m_rep == &Rep::null(); }
+        bool isEmpty() const { return !m_rep->size(); }
 
         bool is8Bit() const;
 
@@ -349,36 +205,9 @@ namespace JSC {
             ASSERT(m_rep);
         }
 
-        size_t cost() const;
-
-        // Attempt to grow this string such that it can grow to a total length of 'capacity'
-        // without reallocation.  This may fail a number of reasons - if the BasicString is
-        // shared and another string is using part of the capacity beyond our end point, if
-        // the realloc fails, or if this string is empty and has no storage.
-        //
-        // This method returns a boolean indicating success.
-        bool reserveCapacity(int capacity)
-        {
-            return m_rep->reserveCapacity(capacity);
-        }
-
-#if PLATFORM(QT)
-        operator QT_PREPEND_NAMESPACE(QString)() const
-        {
-            QT_USE_NAMESPACE;
-            return QString(reinterpret_cast<const QChar*>(this->data()), this->size());
-        }
-
-        UString(const QT_PREPEND_NAMESPACE(QString)& str)
-        {
-            *this = JSC::UString(reinterpret_cast<const UChar*>(str.constData()), str.length());
-        }
-#endif
-
+        size_t cost() const { return m_rep->cost(); }
 
     private:
-        void expandCapacity(int requiredLength);
-        void expandPreCapacity(int requiredPreCap);
         void makeNull();
 
         RefPtr<Rep> m_rep;
@@ -386,13 +215,9 @@ namespace JSC {
 
         friend void initializeUString();
         friend bool operator==(const UString&, const UString&);
-        friend PassRefPtr<Rep> concatenate(Rep*, Rep*); // returns 0 if out of memory
     };
-    PassRefPtr<UString::Rep> concatenate(UString::Rep*, UString::Rep*);
-    PassRefPtr<UString::Rep> concatenate(UString::Rep*, int);
-    PassRefPtr<UString::Rep> concatenate(UString::Rep*, double);
 
-    inline bool operator==(const UString& s1, const UString& s2)
+    ALWAYS_INLINE bool operator==(const UString& s1, const UString& s2)
     {
         int size = s1.size();
         switch (size) {
@@ -438,72 +263,8 @@ namespace JSC {
         return !JSC::operator==(s1, s2);
     }
 
-    bool operator==(const CString&, const CString&);
-
-    inline UString operator+(const UString& s1, const UString& s2)
-    {
-        RefPtr<UString::Rep> result = concatenate(s1.rep(), s2.rep());
-        return UString(result ? result.release() : UString::nullRep());
-    }
-
     int compare(const UString&, const UString&);
 
-    bool equal(const UString::Rep*, const UString::Rep*);
-
-    inline PassRefPtr<UString::Rep> UString::Rep::create(PassRefPtr<UString::Rep> rep, int offset, int length)
-    {
-        ASSERT(rep);
-        rep->checkConsistency();
-
-        int repOffset = rep->offset;
-
-        PassRefPtr<BaseString> base = rep->baseString();
-
-        ASSERT(-(offset + repOffset) <= base->usedPreCapacity);
-        ASSERT(offset + repOffset + length <= base->usedCapacity);
-
-        // Steal the single reference this Rep was created with.
-        return adoptRef(new Rep(base, repOffset + offset, length));
-    }
-
-    inline UChar* UString::Rep::data() const
-    {
-        const BaseString* base = baseString();
-        return base->buf + base->preCapacity + offset;
-    }
-
-    inline void UString::Rep::setStatic(bool v)
-    {
-        ASSERT(!identifierTable());
-        if (v)
-            m_identifierTableAndFlags.setFlag(StaticFlag);
-        else
-            m_identifierTableAndFlags.clearFlag(StaticFlag);
-    }
-
-    inline void UString::Rep::setBaseString(PassRefPtr<BaseString> base)
-    {
-        ASSERT(base != this);
-        ASSERT(!baseIsSelf());
-        m_baseString = base.releaseRef();
-    }
-
-    inline UString::BaseString* UString::Rep::baseString()
-    {
-        return !baseIsSelf() ? m_baseString : reinterpret_cast<BaseString*>(this) ;
-    }
-
-    inline const UString::BaseString* UString::Rep::baseString() const
-    {
-        return const_cast<Rep*>(this)->baseString();
-    }
-
-#ifdef NDEBUG
-    inline void UString::Rep::checkConsistency() const
-    {
-    }
-#endif
-
     inline UString::UString()
         : m_rep(&Rep::null())
     {
@@ -524,45 +285,288 @@ namespace JSC {
     // huge buffer.
     // FIXME: this should be size_t but that would cause warnings until we
     // fix UString sizes to be size_t instead of int
-    static const int minShareSize = Heap::minExtraCostSize / sizeof(UChar);
+    static const int minShareSize = Heap::minExtraCost / sizeof(UChar);
 
-    inline size_t UString::cost() const
-    {
-        BaseString* base = m_rep->baseString();
-        size_t capacity = (base->capacity + base->preCapacity) * sizeof(UChar);
-        size_t reportedCost = base->reportedCost;
-        ASSERT(capacity >= reportedCost);
+    struct IdentifierRepHash : PtrHash<RefPtr<JSC::UString::Rep> > {
+        static unsigned hash(const RefPtr<JSC::UString::Rep>& key) { return key->existingHash(); }
+        static unsigned hash(JSC::UString::Rep* key) { return key->existingHash(); }
+    };
+
+    void initializeUString();
 
-        size_t capacityDelta = capacity - reportedCost;
+    template<typename StringType>
+    class StringTypeAdapter {
+    };
 
-        if (capacityDelta < static_cast<size_t>(minShareSize))
-            return 0;
+    template<>
+    class StringTypeAdapter<char*> {
+    public:
+        StringTypeAdapter<char*>(char* buffer)
+            : m_buffer((unsigned char*)buffer)
+            , m_length(strlen(buffer))
+        {
+        }
 
-        base->reportedCost = capacity;
+        unsigned length() { return m_length; }
 
-        return capacityDelta;
-    }
+        void writeTo(UChar* destination)
+        {
+            for (unsigned i = 0; i < m_length; ++i)
+                destination[i] = m_buffer[i];
+        }
 
-#if PLATFORM(QT)
+    private:
+        const unsigned char* m_buffer;
+        unsigned m_length;
+    };
 
-        inline UString operator+(const char* s1, const UString& s2)
+    template<>
+    class StringTypeAdapter<const char*> {
+    public:
+        StringTypeAdapter<const char*>(const char* buffer)
+            : m_buffer((unsigned char*)buffer)
+            , m_length(strlen(buffer))
         {
-            return operator+(UString(s1), s2);
         }
 
-        inline UString operator+(const UString& s1, const char* s2)
+        unsigned length() { return m_length; }
+
+        void writeTo(UChar* destination)
         {
-            return operator+(s1, UString(s2));
+            for (unsigned i = 0; i < m_length; ++i)
+                destination[i] = m_buffer[i];
         }
 
-#endif
+    private:
+        const unsigned char* m_buffer;
+        unsigned m_length;
+    };
 
-    struct IdentifierRepHash : PtrHash<RefPtr<JSC::UString::Rep> > {
-        static unsigned hash(const RefPtr<JSC::UString::Rep>& key) { return key->computedHash(); }
-        static unsigned hash(JSC::UString::Rep* key) { return key->computedHash(); }
+    template<>
+    class StringTypeAdapter<UString> {
+    public:
+        StringTypeAdapter<UString>(UString& string)
+            : m_data(string.data())
+            , m_length(string.size())
+        {
+        }
+
+        unsigned length() { return m_length; }
+
+        void writeTo(UChar* destination)
+        {
+            for (unsigned i = 0; i < m_length; ++i)
+                destination[i] = m_data[i];
+        }
+
+    private:
+        const UChar* m_data;
+        unsigned m_length;
     };
 
-    void initializeUString();
+    template<typename StringType1, typename StringType2>
+    UString makeString(StringType1 string1, StringType2 string2)
+    {
+        StringTypeAdapter<StringType1> adapter1(string1);
+        StringTypeAdapter<StringType2> adapter2(string2);
+
+        UChar* buffer;
+        unsigned length = adapter1.length() + adapter2.length();
+        PassRefPtr<UStringImpl> resultImpl = UStringImpl::tryCreateUninitialized(length, buffer);
+        if (!resultImpl)
+            return UString();
+
+        UChar* result = buffer;
+        adapter1.writeTo(result);
+        result += adapter1.length();
+        adapter2.writeTo(result);
+
+        return resultImpl;
+    }
+
+    template<typename StringType1, typename StringType2, typename StringType3>
+    UString makeString(StringType1 string1, StringType2 string2, StringType3 string3)
+    {
+        StringTypeAdapter<StringType1> adapter1(string1);
+        StringTypeAdapter<StringType2> adapter2(string2);
+        StringTypeAdapter<StringType3> adapter3(string3);
+
+        UChar* buffer;
+        unsigned length = adapter1.length() + adapter2.length() + adapter3.length();
+        PassRefPtr<UStringImpl> resultImpl = UStringImpl::tryCreateUninitialized(length, buffer);
+        if (!resultImpl)
+            return UString();
+
+        UChar* result = buffer;
+        adapter1.writeTo(result);
+        result += adapter1.length();
+        adapter2.writeTo(result);
+        result += adapter2.length();
+        adapter3.writeTo(result);
+
+        return resultImpl;
+    }
+
+    template<typename StringType1, typename StringType2, typename StringType3, typename StringType4>
+    UString makeString(StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4)
+    {
+        StringTypeAdapter<StringType1> adapter1(string1);
+        StringTypeAdapter<StringType2> adapter2(string2);
+        StringTypeAdapter<StringType3> adapter3(string3);
+        StringTypeAdapter<StringType4> adapter4(string4);
+
+        UChar* buffer;
+        unsigned length = adapter1.length() + adapter2.length() + adapter3.length() + adapter4.length();
+        PassRefPtr<UStringImpl> resultImpl = UStringImpl::tryCreateUninitialized(length, buffer);
+        if (!resultImpl)
+            return UString();
+
+        UChar* result = buffer;
+        adapter1.writeTo(result);
+        result += adapter1.length();
+        adapter2.writeTo(result);
+        result += adapter2.length();
+        adapter3.writeTo(result);
+        result += adapter3.length();
+        adapter4.writeTo(result);
+
+        return resultImpl;
+    }
+
+    template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5>
+    UString makeString(StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5)
+    {
+        StringTypeAdapter<StringType1> adapter1(string1);
+        StringTypeAdapter<StringType2> adapter2(string2);
+        StringTypeAdapter<StringType3> adapter3(string3);
+        StringTypeAdapter<StringType4> adapter4(string4);
+        StringTypeAdapter<StringType5> adapter5(string5);
+
+        UChar* buffer;
+        unsigned length = adapter1.length() + adapter2.length() + adapter3.length() + adapter4.length() + adapter5.length();
+        PassRefPtr<UStringImpl> resultImpl = UStringImpl::tryCreateUninitialized(length, buffer);
+        if (!resultImpl)
+            return UString();
+
+        UChar* result = buffer;
+        adapter1.writeTo(result);
+        result += adapter1.length();
+        adapter2.writeTo(result);
+        result += adapter2.length();
+        adapter3.writeTo(result);
+        result += adapter3.length();
+        adapter4.writeTo(result);
+        result += adapter4.length();
+        adapter5.writeTo(result);
+
+        return resultImpl;
+    }
+
+    template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5, typename StringType6>
+    UString makeString(StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5, StringType6 string6)
+    {
+        StringTypeAdapter<StringType1> adapter1(string1);
+        StringTypeAdapter<StringType2> adapter2(string2);
+        StringTypeAdapter<StringType3> adapter3(string3);
+        StringTypeAdapter<StringType4> adapter4(string4);
+        StringTypeAdapter<StringType5> adapter5(string5);
+        StringTypeAdapter<StringType6> adapter6(string6);
+
+        UChar* buffer;
+        unsigned length = adapter1.length() + adapter2.length() + adapter3.length() + adapter4.length() + adapter5.length() + adapter6.length();
+        PassRefPtr<UStringImpl> resultImpl = UStringImpl::tryCreateUninitialized(length, buffer);
+        if (!resultImpl)
+            return UString();
+
+        UChar* result = buffer;
+        adapter1.writeTo(result);
+        result += adapter1.length();
+        adapter2.writeTo(result);
+        result += adapter2.length();
+        adapter3.writeTo(result);
+        result += adapter3.length();
+        adapter4.writeTo(result);
+        result += adapter4.length();
+        adapter5.writeTo(result);
+        result += adapter5.length();
+        adapter6.writeTo(result);
+
+        return resultImpl;
+    }
+
+    template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5, typename StringType6, typename StringType7>
+    UString makeString(StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5, StringType6 string6, StringType7 string7)
+    {
+        StringTypeAdapter<StringType1> adapter1(string1);
+        StringTypeAdapter<StringType2> adapter2(string2);
+        StringTypeAdapter<StringType3> adapter3(string3);
+        StringTypeAdapter<StringType4> adapter4(string4);
+        StringTypeAdapter<StringType5> adapter5(string5);
+        StringTypeAdapter<StringType6> adapter6(string6);
+        StringTypeAdapter<StringType7> adapter7(string7);
+
+        UChar* buffer;
+        unsigned length = adapter1.length() + adapter2.length() + adapter3.length() + adapter4.length() + adapter5.length() + adapter6.length() + adapter7.length();
+        PassRefPtr<UStringImpl> resultImpl = UStringImpl::tryCreateUninitialized(length, buffer);
+        if (!resultImpl)
+            return UString();
+
+        UChar* result = buffer;
+        adapter1.writeTo(result);
+        result += adapter1.length();
+        adapter2.writeTo(result);
+        result += adapter2.length();
+        adapter3.writeTo(result);
+        result += adapter3.length();
+        adapter4.writeTo(result);
+        result += adapter4.length();
+        adapter5.writeTo(result);
+        result += adapter5.length();
+        adapter6.writeTo(result);
+        result += adapter6.length();
+        adapter7.writeTo(result);
+
+        return resultImpl;
+    }
+
+    template<typename StringType1, typename StringType2, typename StringType3, typename StringType4, typename StringType5, typename StringType6, typename StringType7, typename StringType8>
+    UString makeString(StringType1 string1, StringType2 string2, StringType3 string3, StringType4 string4, StringType5 string5, StringType6 string6, StringType7 string7, StringType8 string8)
+    {
+        StringTypeAdapter<StringType1> adapter1(string1);
+        StringTypeAdapter<StringType2> adapter2(string2);
+        StringTypeAdapter<StringType3> adapter3(string3);
+        StringTypeAdapter<StringType4> adapter4(string4);
+        StringTypeAdapter<StringType5> adapter5(string5);
+        StringTypeAdapter<StringType6> adapter6(string6);
+        StringTypeAdapter<StringType7> adapter7(string7);
+        StringTypeAdapter<StringType8> adapter8(string8);
+
+        UChar* buffer;
+        unsigned length = adapter1.length() + adapter2.length() + adapter3.length() + adapter4.length() + adapter5.length() + adapter6.length() + adapter7.length() + adapter8.length();
+        PassRefPtr<UStringImpl> resultImpl = UStringImpl::tryCreateUninitialized(length, buffer);
+        if (!resultImpl)
+            return UString();
+
+        UChar* result = buffer;
+        adapter1.writeTo(result);
+        result += adapter1.length();
+        adapter2.writeTo(result);
+        result += adapter2.length();
+        adapter3.writeTo(result);
+        result += adapter3.length();
+        adapter4.writeTo(result);
+        result += adapter4.length();
+        adapter5.writeTo(result);
+        result += adapter5.length();
+        adapter6.writeTo(result);
+        result += adapter6.length();
+        adapter7.writeTo(result);
+        result += adapter7.length();
+        adapter8.writeTo(result);
+
+        return resultImpl;
+    }
+
 } // namespace JSC
 
 namespace WTF {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UStringImpl.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UStringImpl.cpp
new file mode 100644
index 0000000..4b0d1c9
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UStringImpl.cpp
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "UStringImpl.h"
+
+#include "Identifier.h"
+#include "UString.h"
+#include <wtf/unicode/UTF8.h>
+
+using namespace WTF::Unicode;
+using namespace std;
+
+namespace JSC {
+ 
+SharedUChar* UStringImpl::baseSharedBuffer()
+{
+    ASSERT((bufferOwnership() == BufferShared)
+        || ((bufferOwnership() == BufferOwned) && !m_dataBuffer.asPtr<void*>()));
+
+    if (bufferOwnership() != BufferShared)
+        m_dataBuffer = UntypedPtrAndBitfield(SharedUChar::create(new OwnFastMallocPtr<UChar>(m_data)).releaseRef(), BufferShared);
+
+    return m_dataBuffer.asPtr<SharedUChar*>();
+}
+
+SharedUChar* UStringImpl::sharedBuffer()
+{
+    if (m_length < s_minLengthToShare)
+        return 0;
+    ASSERT(!isStatic());
+
+    UStringImpl* owner = bufferOwnerString();
+    if (owner->bufferOwnership() == BufferInternal)
+        return 0;
+
+    return owner->baseSharedBuffer();
+}
+
+UStringImpl::~UStringImpl()
+{
+    ASSERT(!isStatic());
+    checkConsistency();
+
+    if (isIdentifier())
+        Identifier::remove(this);
+
+    if (bufferOwnership() != BufferInternal) {
+        if (bufferOwnership() == BufferOwned)
+            fastFree(m_data);
+        else if (bufferOwnership() == BufferSubstring)
+            m_dataBuffer.asPtr<UStringImpl*>()->deref();
+        else {
+            ASSERT(bufferOwnership() == BufferShared);
+            m_dataBuffer.asPtr<SharedUChar*>()->deref();
+        }
+    }
+}
+
+}
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UStringImpl.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UStringImpl.h
new file mode 100644
index 0000000..4e1ddc7
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/UStringImpl.h
@@ -0,0 +1,313 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef UStringImpl_h
+#define UStringImpl_h
+
+#include <limits>
+#include <wtf/CrossThreadRefCounted.h>
+#include <wtf/OwnFastMallocPtr.h>
+#include <wtf/PossiblyNull.h>
+#include <wtf/StringHashFunctions.h>
+#include <wtf/Vector.h>
+#include <wtf/unicode/Unicode.h>
+
+namespace JSC {
+
+class IdentifierTable;
+  
+typedef CrossThreadRefCounted<OwnFastMallocPtr<UChar> > SharedUChar;
+
+class UntypedPtrAndBitfield {
+public:
+    UntypedPtrAndBitfield() {}
+
+    UntypedPtrAndBitfield(void* ptrValue, uintptr_t bitValue)
+        : m_value(reinterpret_cast<uintptr_t>(ptrValue) | bitValue)
+#ifndef NDEBUG
+        , m_leaksPtr(ptrValue)
+#endif
+    {
+        ASSERT(ptrValue == asPtr<void*>());
+        ASSERT((*this & ~s_alignmentMask) == bitValue);
+    }
+
+    template<typename T>
+    T asPtr() const { return reinterpret_cast<T>(m_value & s_alignmentMask); }
+
+    UntypedPtrAndBitfield& operator&=(uintptr_t bits)
+    {
+        m_value &= bits | s_alignmentMask;
+        return *this;
+    }
+
+    UntypedPtrAndBitfield& operator|=(uintptr_t bits)
+    {
+        m_value |= bits & ~s_alignmentMask;
+        return *this;
+    }
+
+    uintptr_t operator&(uintptr_t mask) const
+    {
+        return m_value & mask & ~s_alignmentMask;
+    }
+
+private:
+    static const uintptr_t s_alignmentMask = ~static_cast<uintptr_t>(0x7);
+    uintptr_t m_value;
+#ifndef NDEBUG
+        void* m_leaksPtr; // Only used to allow tools like leaks on OSX to detect that the memory is referenced.
+#endif
+};
+
+class UStringImpl : Noncopyable {
+public:
+    template<size_t inlineCapacity>
+    static PassRefPtr<UStringImpl> adopt(Vector<UChar, inlineCapacity>& vector)
+    {
+        if (unsigned length = vector.size())
+            return adoptRef(new UStringImpl(vector.releaseBuffer(), length, BufferOwned));
+        return &empty();
+    }
+
+    static PassRefPtr<UStringImpl> create(const UChar* buffer, int length)
+    {
+        UChar* newBuffer;
+        if (PassRefPtr<UStringImpl> impl = tryCreateUninitialized(length, newBuffer)) {
+            copyChars(newBuffer, buffer, length);
+            return impl;
+        }
+        return &null();
+    }
+
+    static PassRefPtr<UStringImpl> create(PassRefPtr<UStringImpl> rep, int offset, int length)
+    {
+        ASSERT(rep);
+        rep->checkConsistency();
+        return adoptRef(new UStringImpl(rep->m_data + offset, length, rep->bufferOwnerString()));
+    }
+
+    static PassRefPtr<UStringImpl> create(PassRefPtr<SharedUChar> sharedBuffer, UChar* buffer, int length)
+    {
+        return adoptRef(new UStringImpl(buffer, length, sharedBuffer));
+    }
+
+    static PassRefPtr<UStringImpl> createUninitialized(unsigned length, UChar*& output)
+    {
+        if (!length) {
+            output = 0;
+            return &empty();
+        }
+
+        if (length > ((std::numeric_limits<size_t>::max() - sizeof(UStringImpl)) / sizeof(UChar)))
+            CRASH();
+        UStringImpl* resultImpl = static_cast<UStringImpl*>(fastMalloc(sizeof(UChar) * length + sizeof(UStringImpl)));
+        output = reinterpret_cast<UChar*>(resultImpl + 1);
+        return adoptRef(new(resultImpl) UStringImpl(output, length, BufferInternal));
+    }
+
+    static PassRefPtr<UStringImpl> tryCreateUninitialized(unsigned length, UChar*& output)
+    {
+        if (!length) {
+            output = 0;
+            return &empty();
+        }
+
+        if (length > ((std::numeric_limits<size_t>::max() - sizeof(UStringImpl)) / sizeof(UChar)))
+            return 0;
+        UStringImpl* resultImpl;
+        if (!tryFastMalloc(sizeof(UChar) * length + sizeof(UStringImpl)).getValue(resultImpl))
+            return 0;
+        output = reinterpret_cast<UChar*>(resultImpl + 1);
+        return adoptRef(new(resultImpl) UStringImpl(output, length, BufferInternal));
+    }
+
+    SharedUChar* sharedBuffer();
+    UChar* data() const { return m_data; }
+    int size() const { return m_length; }
+    size_t cost()
+    {
+        // For substrings, return the cost of the base string.
+        if (bufferOwnership() == BufferSubstring)
+            return m_dataBuffer.asPtr<UStringImpl*>()->cost();
+
+        if (m_dataBuffer & s_reportedCostBit)
+            return 0;
+        m_dataBuffer |= s_reportedCostBit;
+        return m_length;
+    }
+    unsigned hash() const { if (!m_hash) m_hash = computeHash(data(), m_length); return m_hash; }
+    unsigned existingHash() const { ASSERT(m_hash); return m_hash; } // fast path for Identifiers
+    void setHash(unsigned hash) { ASSERT(hash == computeHash(data(), m_length)); m_hash = hash; } // fast path for Identifiers
+    bool isIdentifier() const { return m_isIdentifier; }
+    void setIsIdentifier(bool isIdentifier) { m_isIdentifier = isIdentifier; }
+
+    UStringImpl* ref() { m_refCount += s_refCountIncrement; return this; }
+    ALWAYS_INLINE void deref() { if (!(m_refCount -= s_refCountIncrement)) delete this; }
+
+    static void copyChars(UChar* destination, const UChar* source, unsigned numCharacters)
+    {
+        if (numCharacters <= s_copyCharsInlineCutOff) {
+            for (unsigned i = 0; i < numCharacters; ++i)
+                destination[i] = source[i];
+        } else
+            memcpy(destination, source, numCharacters * sizeof(UChar));
+    }
+
+    static unsigned computeHash(const UChar* s, int length) { ASSERT(length >= 0); return WTF::stringHash(s, length); }
+    static unsigned computeHash(const char* s, int length) { ASSERT(length >= 0); return WTF::stringHash(s, length); }
+    static unsigned computeHash(const char* s) { return WTF::stringHash(s); }
+
+    static UStringImpl& null() { return *s_null; }
+    static UStringImpl& empty() { return *s_empty; }
+
+    ALWAYS_INLINE void checkConsistency() const
+    {
+        // There is no recursion of substrings.
+        ASSERT(bufferOwnerString()->bufferOwnership() != BufferSubstring);
+        // Static strings cannot be put in identifier tables, because they are globally shared.
+        ASSERT(!isStatic() || !isIdentifier());
+    }
+
+private:
+    enum BufferOwnership {
+        BufferInternal,
+        BufferOwned,
+        BufferSubstring,
+        BufferShared,
+    };
+
+    // For SmallStringStorage, which allocates an array and uses an in-place new.
+    UStringImpl() { }
+
+    // Used to construct normal strings with an internal or external buffer.
+    UStringImpl(UChar* data, int length, BufferOwnership ownership)
+        : m_data(data)
+        , m_length(length)
+        , m_refCount(s_refCountIncrement)
+        , m_hash(0)
+        , m_isIdentifier(false)
+        , m_dataBuffer(0, ownership)
+    {
+        ASSERT((ownership == BufferInternal) || (ownership == BufferOwned));
+        checkConsistency();
+    }
+
+    // Used to construct static strings, which have an special refCount that can never hit zero.
+    // This means that the static string will never be destroyed, which is important because
+    // static strings will be shared across threads & ref-counted in a non-threadsafe manner.
+    enum StaticStringConstructType { ConstructStaticString };
+    UStringImpl(UChar* data, int length, StaticStringConstructType)
+        : m_data(data)
+        , m_length(length)
+        , m_refCount(s_staticRefCountInitialValue)
+        , m_hash(0)
+        , m_isIdentifier(false)
+        , m_dataBuffer(0, BufferOwned)
+    {
+        checkConsistency();
+    }
+
+    // Used to create new strings that are a substring of an existing string.
+    UStringImpl(UChar* data, int length, PassRefPtr<UStringImpl> base)
+        : m_data(data)
+        , m_length(length)
+        , m_refCount(s_refCountIncrement)
+        , m_hash(0)
+        , m_isIdentifier(false)
+        , m_dataBuffer(base.releaseRef(), BufferSubstring)
+    {
+        // Do use static strings as a base for substrings; UntypedPtrAndBitfield assumes
+        // that all pointers will be at least 8-byte aligned, we cannot guarantee that of
+        // UStringImpls that are not heap allocated.
+        ASSERT(m_dataBuffer.asPtr<UStringImpl*>()->size());
+        ASSERT(!m_dataBuffer.asPtr<UStringImpl*>()->isStatic());
+        checkConsistency();
+    }
+
+    // Used to construct new strings sharing an existing shared buffer.
+    UStringImpl(UChar* data, int length, PassRefPtr<SharedUChar> sharedBuffer)
+        : m_data(data)
+        , m_length(length)
+        , m_refCount(s_refCountIncrement)
+        , m_hash(0)
+        , m_isIdentifier(false)
+        , m_dataBuffer(sharedBuffer.releaseRef(), BufferShared)
+    {
+        checkConsistency();
+    }
+
+#if OS(SOLARIS) && COMPILER(SUNCC)
+public: // Otherwise the compiler complains about operator new not being accessible.
+#endif
+#if COMPILER(WINSCW) || COMPILER(XLC)
+    void* operator new(size_t size) { return Noncopyable::operator new(size); }
+#else
+    using Noncopyable::operator new;
+#endif
+#if OS(SOLARIS) && COMPILER(SUNCC)
+private:
+#endif
+    void* operator new(size_t, void* p) { return p; }
+
+    ~UStringImpl();
+
+    // This number must be at least 2 to avoid sharing empty, null as well as 1 character strings from SmallStrings.
+    static const int s_minLengthToShare = 10;
+    static const unsigned s_copyCharsInlineCutOff = 20;
+    static const uintptr_t s_bufferOwnershipMask = 3;
+    static const uintptr_t s_reportedCostBit = 4;
+    // We initialize and increment/decrement the refCount for all normal (non-static) strings by the value 2.
+    // We initialize static strings with an odd number (specifically, 1), such that the refCount cannot reach zero.
+    static const int s_refCountIncrement = 2;
+    static const int s_staticRefCountInitialValue = 1;
+
+    UStringImpl* bufferOwnerString() { return (bufferOwnership() == BufferSubstring) ? m_dataBuffer.asPtr<UStringImpl*>() :  this; }
+    const UStringImpl* bufferOwnerString() const { return (bufferOwnership() == BufferSubstring) ? m_dataBuffer.asPtr<UStringImpl*>() :  this; }
+    SharedUChar* baseSharedBuffer();
+    unsigned bufferOwnership() const { return m_dataBuffer & s_bufferOwnershipMask; }
+    bool isStatic() const { return m_refCount & 1; }
+
+    // unshared data
+    UChar* m_data;
+    int m_length;
+    unsigned m_refCount;
+    mutable unsigned m_hash : 31;
+    mutable unsigned m_isIdentifier : 1;
+    UntypedPtrAndBitfield m_dataBuffer;
+
+    JS_EXPORTDATA static UStringImpl* s_null;
+    JS_EXPORTDATA static UStringImpl* s_empty;
+
+    friend class JIT;
+    friend class SmallStringsStorage;
+    friend void initializeUString();
+};
+
+bool equal(const UStringImpl*, const UStringImpl*);
+
+}
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakGCMap.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakGCMap.h
new file mode 100644
index 0000000..39a91c5
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakGCMap.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WeakGCMap_h
+#define WeakGCMap_h
+
+#include "Collector.h"
+#include <wtf/HashMap.h>
+
+namespace JSC {
+
+class JSCell;
+
+// A HashMap whose get() function returns emptyValue() for cells awaiting destruction.
+template<typename KeyType, typename MappedType>
+class WeakGCMap : public FastAllocBase {
+    /*
+    Invariants:
+        * A value enters the WeakGCMap marked. (Guaranteed by set().)
+        * A value that becomes unmarked leaves the WeakGCMap before being recycled. (Guaranteed by the value's destructor removing it from the WeakGCMap.)
+        * A value that becomes unmarked leaves the WeakGCMap before becoming marked again. (Guaranteed by all destructors running before the mark phase begins.)
+        * During the mark phase, all values in the WeakGCMap are valid. (Guaranteed by all destructors running before the mark phase begins.)
+    */
+
+public:
+    typedef typename HashMap<KeyType, MappedType>::iterator iterator;
+    typedef typename HashMap<KeyType, MappedType>::const_iterator const_iterator;
+    
+    bool isEmpty() { return m_map.isEmpty(); }
+
+    MappedType get(const KeyType& key) const;
+    pair<iterator, bool> set(const KeyType&, const MappedType&); 
+    MappedType take(const KeyType& key);
+
+    // These unchecked functions provide access to a value even if the value's
+    // mark bit is not set. This is used, among other things, to retrieve values
+    // during the GC mark phase, which begins by clearing all mark bits.
+
+    MappedType uncheckedGet(const KeyType& key) const { return m_map.get(key); }
+    bool uncheckedRemove(const KeyType&, const MappedType&);
+
+    iterator uncheckedBegin() { return m_map.begin(); }
+    iterator uncheckedEnd() { return m_map.end(); }
+
+    const_iterator uncheckedBegin() const { return m_map.begin(); }
+    const_iterator uncheckedEnd() const { return m_map.end(); }
+
+private:
+    HashMap<KeyType, MappedType> m_map;
+};
+
+template<typename KeyType, typename MappedType>
+inline MappedType WeakGCMap<KeyType, MappedType>::get(const KeyType& key) const
+{
+    MappedType result = m_map.get(key);
+    if (result == HashTraits<MappedType>::emptyValue())
+        return result;
+    if (!Heap::isCellMarked(result))
+        return HashTraits<MappedType>::emptyValue();
+    return result;
+}
+
+template<typename KeyType, typename MappedType>
+MappedType WeakGCMap<KeyType, MappedType>::take(const KeyType& key)
+{
+    MappedType result = m_map.take(key);
+    if (result == HashTraits<MappedType>::emptyValue())
+        return result;
+    if (!Heap::isCellMarked(result))
+        return HashTraits<MappedType>::emptyValue();
+    return result;
+}
+
+template<typename KeyType, typename MappedType>
+pair<typename HashMap<KeyType, MappedType>::iterator, bool> WeakGCMap<KeyType, MappedType>::set(const KeyType& key, const MappedType& value)
+{
+    Heap::markCell(value); // If value is newly allocated, it's not marked, so mark it now.
+    pair<iterator, bool> result = m_map.add(key, value);
+    if (!result.second) { // pre-existing entry
+        result.second = !Heap::isCellMarked(result.first->second);
+        result.first->second = value;
+    }
+    return result;
+}
+
+template<typename KeyType, typename MappedType>
+bool WeakGCMap<KeyType, MappedType>::uncheckedRemove(const KeyType& key, const MappedType& value)
+{
+    iterator it = m_map.find(key);
+    if (it == m_map.end())
+        return false;
+    if (it->second != value)
+        return false;
+    m_map.remove(it);
+    return true;
+}
+
+} // namespace JSC
+
+#endif // WeakGCMap_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakGCPtr.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakGCPtr.h
new file mode 100644
index 0000000..8653721
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakGCPtr.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WeakGCPtr_h
+#define WeakGCPtr_h
+
+#include "Collector.h"
+#include <wtf/Noncopyable.h>
+
+namespace JSC {
+
+// A smart pointer whose get() function returns 0 for cells awaiting destruction.
+template <typename T> class WeakGCPtr : Noncopyable {
+public:
+    WeakGCPtr() : m_ptr(0) { }
+    WeakGCPtr(T* ptr) { assign(ptr); }
+
+    T* get() const
+    {
+        if (!m_ptr || !Heap::isCellMarked(m_ptr))
+            return 0;
+        return m_ptr;
+    }
+    
+    void clear() { m_ptr = 0; }
+
+    T& operator*() const { return *get(); }
+    T* operator->() const { return get(); }
+    
+    bool operator!() const { return !get(); }
+
+    // This conversion operator allows implicit conversion to bool but not to other integer types.
+#if COMPILER(WINSCW)
+    operator bool() const { return m_ptr; }
+#else
+    typedef T* WeakGCPtr::*UnspecifiedBoolType;
+    operator UnspecifiedBoolType() const { return get() ? &WeakGCPtr::m_ptr : 0; }
+#endif
+
+    WeakGCPtr& operator=(T*);
+
+private:
+    void assign(T* ptr)
+    {
+        if (ptr)
+            Heap::markCell(ptr);
+        m_ptr = ptr;
+    }
+
+    T* m_ptr;
+};
+
+template <typename T> inline WeakGCPtr<T>& WeakGCPtr<T>::operator=(T* optr)
+{
+    assign(optr);
+    return *this;
+}
+
+template <typename T, typename U> inline bool operator==(const WeakGCPtr<T>& a, const WeakGCPtr<U>& b)
+{ 
+    return a.get() == b.get(); 
+}
+
+template <typename T, typename U> inline bool operator==(const WeakGCPtr<T>& a, U* b)
+{ 
+    return a.get() == b; 
+}
+
+template <typename T, typename U> inline bool operator==(T* a, const WeakGCPtr<U>& b) 
+{
+    return a == b.get(); 
+}
+
+template <typename T, typename U> inline bool operator!=(const WeakGCPtr<T>& a, const WeakGCPtr<U>& b)
+{ 
+    return a.get() != b.get(); 
+}
+
+template <typename T, typename U> inline bool operator!=(const WeakGCPtr<T>& a, U* b)
+{
+    return a.get() != b; 
+}
+
+template <typename T, typename U> inline bool operator!=(T* a, const WeakGCPtr<U>& b)
+{ 
+    return a != b.get(); 
+}
+
+template <typename T, typename U> inline WeakGCPtr<T> static_pointer_cast(const WeakGCPtr<U>& p)
+{ 
+    return WeakGCPtr<T>(static_cast<T*>(p.get())); 
+}
+
+template <typename T, typename U> inline WeakGCPtr<T> const_pointer_cast(const WeakGCPtr<U>& p)
+{ 
+    return WeakGCPtr<T>(const_cast<T*>(p.get())); 
+}
+
+template <typename T> inline T* getPtr(const WeakGCPtr<T>& p)
+{
+    return p.get();
+}
+
+} // namespace JSC
+
+#endif // WeakGCPtr_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakRandom.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakRandom.h
new file mode 100644
index 0000000..ff3995e
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/WeakRandom.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ *
+ *
+ * Copyright (c) 2009 Ian C. Bullard
+ * 
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef WeakRandom_h
+#define WeakRandom_h
+
+#include <limits.h>
+#include <wtf/StdLibExtras.h>
+
+namespace JSC {
+
+class WeakRandom {
+public:
+    WeakRandom(unsigned seed)
+        : m_low(seed ^ 0x49616E42)
+        , m_high(seed)
+    {
+    }
+
+    double get()
+    {
+        return advance() / (UINT_MAX + 1.0);
+    }
+
+private:
+    unsigned advance()
+    {
+        m_high = (m_high << 16) + (m_high >> 16);
+        m_high += m_low;
+        m_low += m_high;
+        return m_high;
+    }
+
+    unsigned m_low;
+    unsigned m_high;
+};
+
+} // namespace JSC
+
+#endif // WeakRandom_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WREC.h b/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WREC.h
index 483dce0..13324e7 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WREC.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WREC.h
@@ -32,7 +32,7 @@
 
 #include <wtf/unicode/Unicode.h>
 
-#if COMPILER(GCC) && PLATFORM(X86)
+#if COMPILER(GCC) && CPU(X86)
 #define WREC_CALL __attribute__ ((regparm (3)))
 #else
 #define WREC_CALL
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.cpp
index e62add3..7105984 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.cpp
@@ -40,7 +40,7 @@ namespace JSC { namespace WREC {
 
 void Generator::generateEnter()
 {
-#if PLATFORM(X86)
+#if CPU(X86)
     // On x86 edi & esi are callee preserved registers.
     push(X86Registers::edi);
     push(X86Registers::esi);
@@ -71,7 +71,7 @@ void Generator::generateReturnSuccess()
     store32(index, Address(output, 4)); // match end
     
     // Restore callee save registers.
-#if PLATFORM(X86)
+#if CPU(X86)
     pop(X86Registers::esi);
     pop(X86Registers::edi);
 #endif
@@ -110,7 +110,7 @@ void Generator::generateReturnFailure()
     pop();
     move(Imm32(-1), returnRegister);
 
-#if PLATFORM(X86)
+#if CPU(X86)
     pop(X86Registers::esi);
     pop(X86Registers::edi);
 #endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.h b/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.h
index 294c3d0..d707a6e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wrec/WRECGenerator.h
@@ -62,7 +62,7 @@ namespace JSC {
         {
         }
 
-#if PLATFORM(X86)
+#if CPU(X86)
         static const RegisterID input = X86Registers::eax;
         static const RegisterID index = X86Registers::edx;
         static const RegisterID length = X86Registers::ecx;
@@ -73,7 +73,7 @@ namespace JSC {
 
         static const RegisterID returnRegister = X86Registers::eax;
 #endif
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         static const RegisterID input = X86Registers::edi;
         static const RegisterID index = X86Registers::esi;
         static const RegisterID length = X86Registers::edx;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wscript b/src/3rdparty/javascriptcore/JavaScriptCore/wscript
index 9dd37c9..356950f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wscript
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wscript
@@ -29,8 +29,8 @@ import commands
 
 from settings import *
 
-jscore_excludes = ['jsc.cpp', 'ucptable.cpp', 'GOwnPtr.cpp']
-jscore_excludes.extend(get_excludes(jscore_dir, ['*CF.cpp']))
+jscore_excludes = ['jsc.cpp', 'ucptable.cpp']
+jscore_excludes.extend(get_excludes(jscore_dir, ['*CF.cpp', '*Symbian.cpp']))
 
 sources = []
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/AlwaysInline.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/AlwaysInline.h
index 64fdd99..4e7224c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/AlwaysInline.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/AlwaysInline.h
@@ -23,7 +23,7 @@
 #ifndef ALWAYS_INLINE
 #if COMPILER(GCC) && defined(NDEBUG) && !COMPILER(MINGW)
 #define ALWAYS_INLINE inline __attribute__((__always_inline__))
-#elif COMPILER(MSVC) && defined(NDEBUG)
+#elif (COMPILER(MSVC) || COMPILER(RVCT)) && defined(NDEBUG)
 #define ALWAYS_INLINE __forceinline
 #else
 #define ALWAYS_INLINE inline
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.cpp
index 5af1377..4615810 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.cpp
@@ -35,7 +35,7 @@
 #include <CoreFoundation/CFString.h>
 #endif
 
-#if COMPILER(MSVC) && !PLATFORM(WINCE)
+#if COMPILER(MSVC) && !OS(WINCE)
 #ifndef WINVER
 #define WINVER 0x0500
 #endif
@@ -46,7 +46,7 @@
 #include <crtdbg.h>
 #endif
 
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 #include <winbase.h>
 #endif
 
@@ -85,7 +85,7 @@ static void vprintf_stderr_common(const char* format, va_list args)
                 break;
 
             if (_vsnprintf(buffer, size, format, args) != -1) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
                 // WinCE only supports wide chars
                 wchar_t* wideBuffer = (wchar_t*)malloc(size * sizeof(wchar_t));
                 if (wideBuffer == NULL)
@@ -108,7 +108,7 @@ static void vprintf_stderr_common(const char* format, va_list args)
         } while (size > 1024);
     }
 #endif
-#if PLATFORM(SYMBIAN)
+#if OS(SYMBIAN)
     vfprintf(stdout, format, args);
 #else
     vfprintf(stderr, format, args);
@@ -126,7 +126,7 @@ static void printf_stderr_common(const char* format, ...)
 
 static void printCallSite(const char* file, int line, const char* function)
 {
-#if PLATFORM(WIN) && !PLATFORM(WINCE) && defined _DEBUG
+#if OS(WIN) && !OS(WINCE) && defined _DEBUG
     _CrtDbgReport(_CRT_WARN, file, line, NULL, "%s\n", function);
 #else
     printf_stderr_common("(%s:%d %s)\n", file, line, function);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.h
index f529a62..352a74b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Assertions.h
@@ -50,7 +50,7 @@
 #include <inttypes.h>
 #endif
 
-#if PLATFORM(SYMBIAN)
+#if OS(SYMBIAN)
 #include <e32def.h>
 #include <e32debug.h>
 #endif
@@ -61,24 +61,50 @@
 #define ASSERTIONS_DISABLED_DEFAULT 0
 #endif
 
+#if COMPILER(MSVC7) || COMPILER(WINSCW)
+#define HAVE_VARIADIC_MACRO 0
+#else
+#define HAVE_VARIADIC_MACRO 1
+#endif
+
 #ifndef ASSERT_DISABLED
 #define ASSERT_DISABLED ASSERTIONS_DISABLED_DEFAULT
 #endif
 
+#ifndef ASSERT_MSG_DISABLED
+#if HAVE(VARIADIC_MACRO)
+#define ASSERT_MSG_DISABLED ASSERTIONS_DISABLED_DEFAULT
+#else
+#define ASSERT_MSG_DISABLED 1
+#endif
+#endif
+
 #ifndef ASSERT_ARG_DISABLED
 #define ASSERT_ARG_DISABLED ASSERTIONS_DISABLED_DEFAULT
 #endif
 
 #ifndef FATAL_DISABLED
+#if HAVE(VARIADIC_MACRO)
 #define FATAL_DISABLED ASSERTIONS_DISABLED_DEFAULT
+#else
+#define FATAL_DISABLED 1
+#endif
 #endif
 
 #ifndef ERROR_DISABLED
+#if HAVE(VARIADIC_MACRO)
 #define ERROR_DISABLED ASSERTIONS_DISABLED_DEFAULT
+#else
+#define ERROR_DISABLED 1
+#endif
 #endif
 
 #ifndef LOG_DISABLED
+#if HAVE(VARIADIC_MACRO)
 #define LOG_DISABLED ASSERTIONS_DISABLED_DEFAULT
+#else
+#define LOG_DISABLED 1
+#endif
 #endif
 
 #if COMPILER(GCC)
@@ -125,7 +151,7 @@ void WTFLogVerbose(const char* file, int line, const char* function, WTFLogChann
 /* CRASH -- gets us into the debugger or the crash reporter -- signals are ignored by the crash reporter so we must do better */
 
 #ifndef CRASH
-#if PLATFORM(SYMBIAN)
+#if OS(SYMBIAN)
 #define CRASH() do { \
     __DEBUGGER(); \
     User::Panic(_L("Webkit CRASH"),0); \
@@ -138,9 +164,9 @@ void WTFLogVerbose(const char* file, int line, const char* function, WTFLogChann
 #endif
 #endif
 
-/* ASSERT, ASSERT_WITH_MESSAGE, ASSERT_NOT_REACHED */
+/* ASSERT, ASSERT_NOT_REACHED, ASSERT_UNUSED */
 
-#if PLATFORM(WINCE) && !PLATFORM(TORCHMOBILE)
+#if OS(WINCE) && !PLATFORM(TORCHMOBILE)
 /* FIXME: We include this here only to avoid a conflict with the ASSERT macro. */
 #include <windows.h>
 #undef min
@@ -148,7 +174,7 @@ void WTFLogVerbose(const char* file, int line, const char* function, WTFLogChann
 #undef ERROR
 #endif
 
-#if PLATFORM(WIN_OS) || PLATFORM(SYMBIAN)
+#if OS(WINDOWS) || OS(SYMBIAN)
 /* FIXME: Change to use something other than ASSERT to avoid this conflict with the underlying platform */
 #undef ASSERT
 #endif
@@ -156,13 +182,6 @@ void WTFLogVerbose(const char* file, int line, const char* function, WTFLogChann
 #if ASSERT_DISABLED
 
 #define ASSERT(assertion) ((void)0)
-#if COMPILER(MSVC7)
-#define ASSERT_WITH_MESSAGE(assertion) ((void)0)
-#elif PLATFORM(SYMBIAN)
-#define ASSERT_WITH_MESSAGE(assertion...) ((void)0)
-#else
-#define ASSERT_WITH_MESSAGE(assertion, ...) ((void)0)
-#endif /* COMPILER(MSVC7) */
 #define ASSERT_NOT_REACHED() ((void)0)
 #define ASSERT_UNUSED(variable, assertion) ((void)variable)
 
@@ -174,10 +193,24 @@ void WTFLogVerbose(const char* file, int line, const char* function, WTFLogChann
         CRASH(); \
     } \
 while (0)
+
+#define ASSERT_NOT_REACHED() do { \
+    WTFReportAssertionFailure(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, 0); \
+    CRASH(); \
+} while (0)
+
+#define ASSERT_UNUSED(variable, assertion) ASSERT(assertion)
+
+#endif
+
+/* ASSERT_WITH_MESSAGE */
+
 #if COMPILER(MSVC7)
 #define ASSERT_WITH_MESSAGE(assertion) ((void)0)
-#elif PLATFORM(SYMBIAN)
-#define ASSERT_WITH_MESSAGE(assertion...) ((void)0)
+#elif COMPILER(WINSCW)
+#define ASSERT_WITH_MESSAGE(assertion, arg...) ((void)0)
+#elif ASSERT_MSG_DISABLED
+#define ASSERT_WITH_MESSAGE(assertion, ...) ((void)0)
 #else
 #define ASSERT_WITH_MESSAGE(assertion, ...) do \
     if (!(assertion)) { \
@@ -185,16 +218,9 @@ while (0)
         CRASH(); \
     } \
 while (0)
-#endif /* COMPILER(MSVC7) */
-#define ASSERT_NOT_REACHED() do { \
-    WTFReportAssertionFailure(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, 0); \
-    CRASH(); \
-} while (0)
-
-#define ASSERT_UNUSED(variable, assertion) ASSERT(assertion)
-
 #endif
-
+                        
+                        
 /* ASSERT_ARG */
 
 #if ASSERT_ARG_DISABLED
@@ -219,12 +245,12 @@ while (0)
 
 /* FATAL */
 
-#if FATAL_DISABLED && !COMPILER(MSVC7) && !PLATFORM(SYMBIAN)
-#define FATAL(...) ((void)0)
-#elif COMPILER(MSVC7)
+#if COMPILER(MSVC7)
 #define FATAL() ((void)0)
-#elif PLATFORM(SYMBIAN)
-#define FATAL(args...) ((void)0)
+#elif COMPILER(WINSCW)
+#define FATAL(arg...) ((void)0)
+#elif FATAL_DISABLED
+#define FATAL(...) ((void)0)
 #else
 #define FATAL(...) do { \
     WTFReportFatalError(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, __VA_ARGS__); \
@@ -234,24 +260,24 @@ while (0)
 
 /* LOG_ERROR */
 
-#if ERROR_DISABLED && !COMPILER(MSVC7) && !PLATFORM(SYMBIAN)
-#define LOG_ERROR(...) ((void)0)
-#elif COMPILER(MSVC7)
+#if COMPILER(MSVC7)
 #define LOG_ERROR() ((void)0)
-#elif PLATFORM(SYMBIAN)
-#define LOG_ERROR(args...) ((void)0)
+#elif COMPILER(WINSCW)
+#define LOG_ERROR(arg...)  ((void)0)
+#elif ERROR_DISABLED
+#define LOG_ERROR(...) ((void)0)
 #else
 #define LOG_ERROR(...) WTFReportError(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, __VA_ARGS__)
 #endif
 
 /* LOG */
 
-#if LOG_DISABLED && !COMPILER(MSVC7) && !PLATFORM(SYMBIAN)
-#define LOG(channel, ...) ((void)0)
-#elif COMPILER(MSVC7)
+#if COMPILER(MSVC7)
 #define LOG() ((void)0)
-#elif PLATFORM(SYMBIAN)
-#define LOG(channel, args...) ((void)0)
+#elif COMPILER(WINSCW)
+#define LOG(arg...) ((void)0)
+#elif LOG_DISABLED
+#define LOG(channel, ...) ((void)0)
 #else
 #define LOG(channel, ...) WTFLog(&JOIN_LOG_CHANNEL_WITH_PREFIX(LOG_CHANNEL_PREFIX, channel), __VA_ARGS__)
 #define JOIN_LOG_CHANNEL_WITH_PREFIX(prefix, channel) JOIN_LOG_CHANNEL_WITH_PREFIX_LEVEL_2(prefix, channel)
@@ -260,12 +286,12 @@ while (0)
 
 /* LOG_VERBOSE */
 
-#if LOG_DISABLED && !COMPILER(MSVC7) && !PLATFORM(SYMBIAN)
-#define LOG_VERBOSE(channel, ...) ((void)0)
-#elif COMPILER(MSVC7)
+#if COMPILER(MSVC7)
 #define LOG_VERBOSE(channel) ((void)0)
-#elif PLATFORM(SYMBIAN)
-#define LOG_VERBOSE(channel, args...) ((void)0)
+#elif COMPILER(WINSCW)
+#define LOG_VERBOSE(channel, arg...) ((void)0)
+#elif LOG_DISABLED
+#define LOG_VERBOSE(channel, ...) ((void)0)
 #else
 #define LOG_VERBOSE(channel, ...) WTFLogVerbose(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, &JOIN_LOG_CHANNEL_WITH_PREFIX(LOG_CHANNEL_PREFIX, channel), __VA_ARGS__)
 #endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CrossThreadRefCounted.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CrossThreadRefCounted.h
index 6a05211..f682f0d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CrossThreadRefCounted.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CrossThreadRefCounted.h
@@ -70,10 +70,6 @@ namespace WTF {
             return !m_refCounter.hasOneRef() || (m_threadSafeRefCounter && !m_threadSafeRefCounter->hasOneRef());
         }
 
-#ifndef NDEBUG
-        bool mayBePassedToAnotherThread() const { ASSERT(!m_threadId); return m_refCounter.hasOneRef(); }
-#endif
-
     private:
         CrossThreadRefCounted(T* data, ThreadSafeSharedBase* threadedCounter)
             : m_threadSafeRefCounter(threadedCounter)
@@ -92,6 +88,10 @@ namespace WTF {
 
         void threadSafeDeref();
 
+#ifndef NDEBUG
+        bool isOwnedByCurrentThread() const { return !m_threadId || m_threadId == currentThread(); }
+#endif
+
         RefCountedBase m_refCounter;
         ThreadSafeSharedBase* m_threadSafeRefCounter;
         T* m_data;
@@ -103,7 +103,7 @@ namespace WTF {
     template<class T>
     void CrossThreadRefCounted<T>::ref()
     {
-        ASSERT(!m_threadId || m_threadId == currentThread());
+        ASSERT(isOwnedByCurrentThread());
         m_refCounter.ref();
 #ifndef NDEBUG
         // Store the threadId as soon as the ref count gets to 2.
@@ -119,7 +119,7 @@ namespace WTF {
     template<class T>
     void CrossThreadRefCounted<T>::deref()
     {
-        ASSERT(!m_threadId || m_threadId == currentThread());
+        ASSERT(isOwnedByCurrentThread());
         if (m_refCounter.derefBase()) {
             threadSafeDeref();
             delete this;
@@ -146,10 +146,12 @@ namespace WTF {
     template<class T>
     PassRefPtr<CrossThreadRefCounted<T> > CrossThreadRefCounted<T>::crossThreadCopy()
     {
+        ASSERT(isOwnedByCurrentThread());
         if (m_threadSafeRefCounter)
             m_threadSafeRefCounter->ref();
         else
             m_threadSafeRefCounter = new ThreadSafeSharedBase(2);
+
         return adoptRef(new CrossThreadRefCounted<T>(m_data, m_threadSafeRefCounter));
     }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp
index a3d5290..b272874 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp
@@ -33,7 +33,7 @@
 #include "config.h"
 #include "CurrentTime.h"
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 
 // Windows is first since we want to use hires timers, despite PLATFORM(CF)
 // being defined.
@@ -45,7 +45,7 @@
 #include <time.h>
 
 #if USE(QUERY_PERFORMANCE_COUNTER)
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 extern "C" time_t mktime(struct tm *t);
 #else
 #include <sys/timeb.h>
@@ -63,11 +63,15 @@ extern "C" time_t mktime(struct tm *t);
 #include <sys/time.h>
 #endif
 
+#if PLATFORM(CHROMIUM)
+#error Chromium uses a different timer implementation
+#endif
+
 namespace WTF {
 
 const double msPerSecond = 1000.0;
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 
 #if USE(QUERY_PERFORMANCE_COUNTER)
 
@@ -119,7 +123,7 @@ static double highResUpTime()
 
 static double lowResUTCTime()
 {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
     SYSTEMTIME systemTime;
     GetSystemTime(&systemTime);
     struct tm tmtime;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.h
index 31f1ec8..334a6e9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.h
@@ -32,13 +32,32 @@
 #ifndef CurrentTime_h
 #define CurrentTime_h
 
+#include <time.h>
+
 namespace WTF {
 
-    // Returns the current system (UTC) time in seconds, starting January 1, 1970.
-    // Precision varies depending on a platform but usually is as good or better 
+    // Returns the current UTC time in seconds, counted from January 1, 1970.
+    // Precision varies depending on platform but is usually as good or better 
     // than a millisecond.
     double currentTime();
 
+    // Same thing, in milliseconds.
+    inline double currentTimeMS()
+    {
+        return currentTime() * 1000.0; 
+    }
+
+    inline void getLocalTime(const time_t* localTime, struct tm* localTM)
+    {
+    #if COMPILER(MSVC7) || COMPILER(MINGW) || OS(WINCE)
+        *localTM = *localtime(localTime);
+    #elif COMPILER(MSVC)
+        localtime_s(localTM, localTime);
+    #else
+        localtime_r(localTime, localTM);
+    #endif
+    }
+
 } // namespace WTF
 
 using WTF::currentTime;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.cpp
index 0386494..b9a0207 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.cpp
@@ -39,6 +39,33 @@
  * other provisions required by the MPL or the GPL, as the case may be.
  * If you do not delete the provisions above, a recipient may use your
  * version of this file under any of the LGPL, the MPL or the GPL.
+
+ * Copyright 2006-2008 the V8 project authors. All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
@@ -61,11 +88,7 @@
 #include <errno.h>
 #endif
 
-#if PLATFORM(DARWIN)
-#include <notify.h>
-#endif
-
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 extern "C" size_t strftime(char * const s, const size_t maxsize, const char * const format, const struct tm * const t);
 extern "C" struct tm * localtime(const time_t *timer);
 #endif
@@ -78,8 +101,14 @@ extern "C" struct tm * localtime(const time_t *timer);
 #include <sys/timeb.h>
 #endif
 
+#if USE(JSC)
+#include "CallFrame.h"
+#endif
+
 #define NaN std::numeric_limits<double>::quiet_NaN()
 
+using namespace WTF;
+
 namespace WTF {
 
 /* Constants */
@@ -91,6 +120,10 @@ static const double secondsPerYear = 24.0 * 60.0 * 60.0 * 365.0;
 static const double usecPerSec = 1000000.0;
 
 static const double maxUnixTime = 2145859200.0; // 12/31/2037
+// ECMAScript asks not to support for a date of which total
+// millisecond value is larger than the following value.
+// See 15.9.1.14 of ECMA-262 5th edition.
+static const double maxECMAScriptTime = 8.64E15;
 
 // Day of year for the first day of each month, where index 0 is January, and day 0 is January 1.
 // First for non-leap years, then for leap years.
@@ -139,7 +172,7 @@ static inline double msToDays(double ms)
     return floor(ms / msPerDay);
 }
 
-static inline int msToYear(double ms)
+int msToYear(double ms)
 {
     int approxYear = static_cast<int>(floor(ms / (msPerDay * 365.2425)) + 1970);
     double msFromApproxYearTo1970 = msPerDay * daysFrom1970ToYear(approxYear);
@@ -150,7 +183,7 @@ static inline int msToYear(double ms)
     return approxYear;
 }
 
-static inline int dayInYear(double ms, int year)
+int dayInYear(double ms, int year)
 {
     return static_cast<int>(msToDays(ms) - daysFrom1970ToYear(year));
 }
@@ -196,7 +229,7 @@ static inline int msToHours(double ms)
     return static_cast<int>(result);
 }
 
-static inline int monthFromDayInYear(int dayInYear, bool leapYear)
+int monthFromDayInYear(int dayInYear, bool leapYear)
 {
     const int d = dayInYear;
     int step;
@@ -234,7 +267,7 @@ static inline bool checkMonth(int dayInYear, int& startDayOfThisMonth, int& star
     return (dayInYear <= startDayOfNextMonth);
 }
 
-static inline int dayInMonthFromDayInYear(int dayInYear, bool leapYear)
+int dayInMonthFromDayInYear(int dayInYear, bool leapYear)
 {
     const int d = dayInYear;
     int step;
@@ -277,7 +310,7 @@ static inline double timeToMS(double hour, double min, double sec, double ms)
     return (((hour * minutesPerHour + min) * secondsPerMinute + sec) * msPerSecond + ms);
 }
 
-static int dateToDayInYear(int year, int month, int day)
+double dateToDaysFrom1970(int year, int month, int day)
 {
     year += month / 12;
 
@@ -287,34 +320,13 @@ static int dateToDayInYear(int year, int month, int day)
         --year;
     }
 
-    int yearday = static_cast<int>(floor(daysFrom1970ToYear(year)));
+    double yearday = floor(daysFrom1970ToYear(year));
+    ASSERT((year >= 1970 && yearday >= 0) || (year < 1970 && yearday < 0));
     int monthday = monthToDayInYear(month, isLeapYear(year));
 
     return yearday + monthday + day - 1;
 }
 
-double getCurrentUTCTime()
-{
-    return floor(getCurrentUTCTimeWithMicroseconds());
-}
-
-// Returns current time in milliseconds since 1 Jan 1970.
-double getCurrentUTCTimeWithMicroseconds()
-{
-    return currentTime() * 1000.0; 
-}
-
-void getLocalTime(const time_t* localTime, struct tm* localTM)
-{
-#if COMPILER(MSVC7) || COMPILER(MINGW) || PLATFORM(WINCE)
-    *localTM = *localtime(localTime);
-#elif COMPILER(MSVC)
-    localtime_s(localTM, localTime);
-#else
-    localtime_r(localTime, localTM);
-#endif
-}
-
 // There is a hard limit at 2038 that we currently do not have a workaround
 // for (rdar://problem/5052975).
 static inline int maximumYearForDST()
@@ -328,7 +340,7 @@ static inline int minimumYearForDST()
     // greater than the max year minus 27 (2010), we want to use the max year
     // minus 27 instead, to ensure there is a range of 28 years that all years
     // can map to.
-    return std::min(msToYear(getCurrentUTCTime()), maximumYearForDST() - 27) ;
+    return std::min(msToYear(jsCurrentTime()), maximumYearForDST() - 27) ;
 }
 
 /*
@@ -367,7 +379,11 @@ int equivalentYearForDST(int year)
 
 static int32_t calculateUTCOffset()
 {
+#if PLATFORM(BREWMP)
+    time_t localTime = static_cast<time_t>(currentTime());
+#else
     time_t localTime = time(0);
+#endif
     tm localt;
     getLocalTime(&localTime, &localt);
 
@@ -399,44 +415,10 @@ static int32_t calculateUTCOffset()
     return static_cast<int32_t>(utcOffset * 1000);
 }
 
-#if PLATFORM(DARWIN)
-static int32_t s_cachedUTCOffset; // In milliseconds. An assumption here is that access to an int32_t variable is atomic on platforms that take this code path.
-static bool s_haveCachedUTCOffset;
-static int s_notificationToken;
-#endif
-
-/*
- * Get the difference in milliseconds between this time zone and UTC (GMT)
- * NOT including DST.
- */
-double getUTCOffset()
-{
-#if PLATFORM(DARWIN)
-    if (s_haveCachedUTCOffset) {
-        int notified;
-        uint32_t status = notify_check(s_notificationToken, &notified);
-        if (status == NOTIFY_STATUS_OK && !notified)
-            return s_cachedUTCOffset;
-    }
-#endif
-
-    int32_t utcOffset = calculateUTCOffset();
-
-#if PLATFORM(DARWIN)
-    // Theoretically, it is possible that several threads will be executing this code at once, in which case we will have a race condition,
-    // and a newer value may be overwritten. In practice, time zones don't change that often.
-    s_cachedUTCOffset = utcOffset;
-#endif
-
-    return utcOffset;
-}
-
 /*
- * Get the DST offset for the time passed in.  Takes
- * seconds (not milliseconds) and cannot handle dates before 1970
- * on some OS'
+ * Get the DST offset for the time passed in.
  */
-static double getDSTOffsetSimple(double localTimeSeconds, double utcOffset)
+static double calculateDSTOffsetSimple(double localTimeSeconds, double utcOffset)
 {
     if (localTimeSeconds > maxUnixTime)
         localTimeSeconds = maxUnixTime;
@@ -465,9 +447,9 @@ static double getDSTOffsetSimple(double localTimeSeconds, double utcOffset)
 }
 
 // Get the DST offset, given a time in UTC
-static double getDSTOffset(double ms, double utcOffset)
+static double calculateDSTOffset(double ms, double utcOffset)
 {
-    // On Mac OS X, the call to localtime (see getDSTOffsetSimple) will return historically accurate
+    // On Mac OS X, the call to localtime (see calculateDSTOffsetSimple) will return historically accurate
     // DST information (e.g. New Zealand did not have DST from 1946 to 1974) however the JavaScript
     // standard explicitly dictates that historical information should not be considered when
     // determining DST. For this reason we shift away from years that localtime can handle but would
@@ -479,70 +461,22 @@ static double getDSTOffset(double ms, double utcOffset)
         int dayInYearLocal = dayInYear(ms, year);
         int dayInMonth = dayInMonthFromDayInYear(dayInYearLocal, leapYear);
         int month = monthFromDayInYear(dayInYearLocal, leapYear);
-        int day = dateToDayInYear(equivalentYear, month, dayInMonth);
+        double day = dateToDaysFrom1970(equivalentYear, month, dayInMonth);
         ms = (day * msPerDay) + msToMilliseconds(ms);
     }
 
-    return getDSTOffsetSimple(ms / msPerSecond, utcOffset);
-}
-
-double gregorianDateTimeToMS(const GregorianDateTime& t, double milliSeconds, bool inputIsUTC)
-{
-    int day = dateToDayInYear(t.year + 1900, t.month, t.monthDay);
-    double ms = timeToMS(t.hour, t.minute, t.second, milliSeconds);
-    double result = (day * msPerDay) + ms;
-
-    if (!inputIsUTC) { // convert to UTC
-        double utcOffset = getUTCOffset();
-        result -= utcOffset;
-        result -= getDSTOffset(result, utcOffset);
-    }
-
-    return result;
-}
-
-void msToGregorianDateTime(double ms, bool outputIsUTC, GregorianDateTime& tm)
-{
-    // input is UTC
-    double dstOff = 0.0;
-    const double utcOff = getUTCOffset();
-
-    if (!outputIsUTC) {  // convert to local time
-        dstOff = getDSTOffset(ms, utcOff);
-        ms += dstOff + utcOff;
-    }
-
-    const int year = msToYear(ms);
-    tm.second   =  msToSeconds(ms);
-    tm.minute   =  msToMinutes(ms);
-    tm.hour     =  msToHours(ms);
-    tm.weekDay  =  msToWeekDay(ms);
-    tm.yearDay  =  dayInYear(ms, year);
-    tm.monthDay =  dayInMonthFromDayInYear(tm.yearDay, isLeapYear(year));
-    tm.month    =  monthFromDayInYear(tm.yearDay, isLeapYear(year));
-    tm.year     =  year - 1900;
-    tm.isDST    =  dstOff != 0.0;
-
-    tm.utcOffset = outputIsUTC ? 0 : static_cast<long>((dstOff + utcOff) / msPerSecond);
-    tm.timeZone = NULL;
+    return calculateDSTOffsetSimple(ms / msPerSecond, utcOffset);
 }
 
 void initializeDates()
 {
 #ifndef NDEBUG
     static bool alreadyInitialized;
-    ASSERT(!alreadyInitialized++);
+    ASSERT(!alreadyInitialized);
+    alreadyInitialized = true;
 #endif
 
     equivalentYearForDST(2000); // Need to call once to initialize a static used in this function.
-#if PLATFORM(DARWIN)
-    // Register for a notification whenever the time zone changes.
-    uint32_t status = notify_register_check("com.apple.system.timezone", &s_notificationToken);
-    if (status == NOTIFY_STATUS_OK) {
-        s_cachedUTCOffset = calculateUTCOffset();
-        s_haveCachedUTCOffset = true;
-    }
-#endif
 }
 
 static inline double ymdhmsToSeconds(long year, int mon, int day, int hour, int minute, int second)
@@ -558,7 +492,7 @@ static inline double ymdhmsToSeconds(long year, int mon, int day, int hour, int
 // We follow the recommendation of RFC 2822 to consider all
 // obsolete time zones not listed here equivalent to "-0000".
 static const struct KnownZone {
-#if !PLATFORM(WIN_OS)
+#if !OS(WINDOWS)
     const
 #endif
         char tzName[4];
@@ -623,8 +557,12 @@ static bool parseLong(const char* string, char** stopPosition, int base, long* r
     return true;
 }
 
-double parseDateFromNullTerminatedCharacters(const char* dateString)
+// Odd case where 'exec' is allowed to be 0, to accomodate a caller in WebCore.
+static double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveTZ, int& offset)
 {
+    haveTZ = false;
+    offset = 0;
+
     // This parses a date in the form:
     //     Tuesday, 09-Nov-99 23:12:40 GMT
     // or
@@ -825,9 +763,6 @@ double parseDateFromNullTerminatedCharacters(const char* dateString)
         }
     }
 
-    bool haveTZ = false;
-    int offset = 0;
-
     // Don't fail if the time zone is missing. 
     // Some websites omit the time zone (4275206).
     if (*dateString) {
@@ -890,33 +825,172 @@ double parseDateFromNullTerminatedCharacters(const char* dateString)
         else
             year += 1900;
     }
+    
+    return ymdhmsToSeconds(year, month + 1, day, hour, minute, second) * msPerSecond;
+}
+
+double parseDateFromNullTerminatedCharacters(const char* dateString)
+{
+    bool haveTZ;
+    int offset;
+    double ms = parseDateFromNullTerminatedCharacters(dateString, haveTZ, offset);
+    if (isnan(ms))
+        return NaN;
 
     // fall back to local timezone
     if (!haveTZ) {
-        GregorianDateTime t;
-        t.monthDay = day;
-        t.month = month;
-        t.year = year - 1900;
-        t.isDST = -1;
-        t.second = second;
-        t.minute = minute;
-        t.hour = hour;
-
-        // Use our gregorianDateTimeToMS() rather than mktime() as the latter can't handle the full year range.
-        return gregorianDateTimeToMS(t, 0, false);
+        double utcOffset = calculateUTCOffset();
+        double dstOffset = calculateDSTOffset(ms, utcOffset);
+        offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
     }
-
-    return (ymdhmsToSeconds(year, month + 1, day, hour, minute, second) - (offset * 60.0)) * msPerSecond;
+    return ms - (offset * msPerMinute);
 }
 
 double timeClip(double t)
 {
     if (!isfinite(t))
         return NaN;
-    if (fabs(t) > 8.64E15)
+    if (fabs(t) > maxECMAScriptTime)
         return NaN;
     return trunc(t);
 }
+} // namespace WTF
+
+#if USE(JSC)
+namespace JSC {
+
+// Get the DST offset for the time passed in.
+//
+// NOTE: The implementation relies on the fact that no time zones have
+// more than one daylight savings offset change per month.
+// If this function is called with NaN it returns NaN.
+static double getDSTOffset(ExecState* exec, double ms, double utcOffset)
+{
+    DSTOffsetCache& cache = exec->globalData().dstOffsetCache;
+    double start = cache.start;
+    double end = cache.end;
+
+    if (start <= ms) {
+        // If the time fits in the cached interval, return the cached offset.
+        if (ms <= end) return cache.offset;
+
+        // Compute a possible new interval end.
+        double newEnd = end + cache.increment;
+
+        if (ms <= newEnd) {
+            double endOffset = calculateDSTOffset(newEnd, utcOffset);
+            if (cache.offset == endOffset) {
+                // If the offset at the end of the new interval still matches
+                // the offset in the cache, we grow the cached time interval
+                // and return the offset.
+                cache.end = newEnd;
+                cache.increment = msPerMonth;
+                return endOffset;
+            } else {
+                double offset = calculateDSTOffset(ms, utcOffset);
+                if (offset == endOffset) {
+                    // The offset at the given time is equal to the offset at the
+                    // new end of the interval, so that means that we've just skipped
+                    // the point in time where the DST offset change occurred. Updated
+                    // the interval to reflect this and reset the increment.
+                    cache.start = ms;
+                    cache.end = newEnd;
+                    cache.increment = msPerMonth;
+                } else {
+                    // The interval contains a DST offset change and the given time is
+                    // before it. Adjust the increment to avoid a linear search for
+                    // the offset change point and change the end of the interval.
+                    cache.increment /= 3;
+                    cache.end = ms;
+                }
+                // Update the offset in the cache and return it.
+                cache.offset = offset;
+                return offset;
+            }
+        }
+    }
+
+    // Compute the DST offset for the time and shrink the cache interval
+    // to only contain the time. This allows fast repeated DST offset
+    // computations for the same time.
+    double offset = calculateDSTOffset(ms, utcOffset);
+    cache.offset = offset;
+    cache.start = ms;
+    cache.end = ms;
+    cache.increment = msPerMonth;
+    return offset;
+}
+
+/*
+ * Get the difference in milliseconds between this time zone and UTC (GMT)
+ * NOT including DST.
+ */
+double getUTCOffset(ExecState* exec)
+{
+    double utcOffset = exec->globalData().cachedUTCOffset;
+    if (!isnan(utcOffset))
+        return utcOffset;
+    exec->globalData().cachedUTCOffset = calculateUTCOffset();
+    return exec->globalData().cachedUTCOffset;
+}
 
+double gregorianDateTimeToMS(ExecState* exec, const GregorianDateTime& t, double milliSeconds, bool inputIsUTC)
+{
+    double day = dateToDaysFrom1970(t.year + 1900, t.month, t.monthDay);
+    double ms = timeToMS(t.hour, t.minute, t.second, milliSeconds);
+    double result = (day * WTF::msPerDay) + ms;
 
-} // namespace WTF
+    if (!inputIsUTC) { // convert to UTC
+        double utcOffset = getUTCOffset(exec);
+        result -= utcOffset;
+        result -= getDSTOffset(exec, result, utcOffset);
+    }
+
+    return result;
+}
+
+// input is UTC
+void msToGregorianDateTime(ExecState* exec, double ms, bool outputIsUTC, GregorianDateTime& tm)
+{
+    double dstOff = 0.0;
+    double utcOff = 0.0;
+    if (!outputIsUTC) {
+        utcOff = getUTCOffset(exec);
+        dstOff = getDSTOffset(exec, ms, utcOff);
+        ms += dstOff + utcOff;
+    }
+
+    const int year = msToYear(ms);
+    tm.second   =  msToSeconds(ms);
+    tm.minute   =  msToMinutes(ms);
+    tm.hour     =  msToHours(ms);
+    tm.weekDay  =  msToWeekDay(ms);
+    tm.yearDay  =  dayInYear(ms, year);
+    tm.monthDay =  dayInMonthFromDayInYear(tm.yearDay, isLeapYear(year));
+    tm.month    =  monthFromDayInYear(tm.yearDay, isLeapYear(year));
+    tm.year     =  year - 1900;
+    tm.isDST    =  dstOff != 0.0;
+    tm.utcOffset = static_cast<long>((dstOff + utcOff) / WTF::msPerSecond);
+    tm.timeZone = NULL;
+}
+
+double parseDateFromNullTerminatedCharacters(ExecState* exec, const char* dateString)
+{
+    ASSERT(exec);
+    bool haveTZ;
+    int offset;
+    double ms = WTF::parseDateFromNullTerminatedCharacters(dateString, haveTZ, offset);
+    if (isnan(ms))
+        return NaN;
+
+    // fall back to local timezone
+    if (!haveTZ) {
+        double utcOffset = getUTCOffset(exec);
+        double dstOffset = getDSTOffset(exec, ms, utcOffset);
+        offset = static_cast<int>((utcOffset + dstOffset) / WTF::msPerMinute);
+    }
+    return ms - (offset * WTF::msPerMinute);
+}
+
+} // namespace JSC
+#endif // USE(JSC)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.h
index 6110f76..033d25e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/DateMath.h
@@ -42,27 +42,27 @@
 #ifndef DateMath_h
 #define DateMath_h
 
-#include <time.h>
+#include <math.h>
 #include <string.h>
+#include <time.h>
+#include <wtf/CurrentTime.h>
 #include <wtf/Noncopyable.h>
+#include <wtf/UnusedParam.h>
 
 namespace WTF {
-
-struct GregorianDateTime;
-
 void initializeDates();
-void msToGregorianDateTime(double, bool outputIsUTC, GregorianDateTime&);
-double gregorianDateTimeToMS(const GregorianDateTime&, double, bool inputIsUTC);
-double getUTCOffset();
 int equivalentYearForDST(int year);
-double getCurrentUTCTime();
-double getCurrentUTCTimeWithMicroseconds();
-void getLocalTime(const time_t*, tm*);
 
 // Not really math related, but this is currently the only shared place to put these.  
-double parseDateFromNullTerminatedCharacters(const char*);
+double parseDateFromNullTerminatedCharacters(const char* dateString);
 double timeClip(double);
 
+inline double jsCurrentTime()
+{
+    // JavaScript doesn't recognize fractions of a millisecond.
+    return floor(WTF::currentTimeMS());
+}
+
 const char * const weekdayName[7] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" };
 const char * const monthName[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
 
@@ -74,9 +74,39 @@ const double msPerSecond = 1000.0;
 const double msPerMinute = 60.0 * 1000.0;
 const double msPerHour = 60.0 * 60.0 * 1000.0;
 const double msPerDay = 24.0 * 60.0 * 60.0 * 1000.0;
+const double msPerMonth = 2592000000.0;
 
-// Intentionally overridding the default tm of the system
-// Tee members of tm differ on various operating systems.
+// Returns the number of days from 1970-01-01 to the specified date.
+double dateToDaysFrom1970(int year, int month, int day);
+int msToYear(double ms);
+int dayInYear(double ms, int year);
+int monthFromDayInYear(int dayInYear, bool leapYear);
+int dayInMonthFromDayInYear(int dayInYear, bool leapYear);
+
+} // namespace WTF
+
+using WTF::dateToDaysFrom1970;
+using WTF::dayInMonthFromDayInYear;
+using WTF::dayInYear;
+using WTF::minutesPerHour;
+using WTF::monthFromDayInYear;
+using WTF::msPerDay;
+using WTF::msPerSecond;
+using WTF::msToYear;
+using WTF::secondsPerMinute;
+
+#if USE(JSC)
+namespace JSC {
+class ExecState;
+struct GregorianDateTime;
+
+void msToGregorianDateTime(ExecState*, double, bool outputIsUTC, GregorianDateTime&);
+double gregorianDateTimeToMS(ExecState*, const GregorianDateTime&, double, bool inputIsUTC);
+double getUTCOffset(ExecState*);
+double parseDateFromNullTerminatedCharacters(ExecState*, const char* dateString);
+
+// Intentionally overridding the default tm of the system.
+// The members of tm differ on various operating systems.
 struct GregorianDateTime : Noncopyable {
     GregorianDateTime()
         : second(0)
@@ -98,7 +128,7 @@ struct GregorianDateTime : Noncopyable {
         delete [] timeZone;
     }
 
-    GregorianDateTime(const tm& inTm)
+    GregorianDateTime(ExecState* exec, const tm& inTm)
         : second(inTm.tm_sec)
         , minute(inTm.tm_min)
         , hour(inTm.tm_hour)
@@ -109,10 +139,11 @@ struct GregorianDateTime : Noncopyable {
         , year(inTm.tm_year)
         , isDST(inTm.tm_isdst)
     {
+        UNUSED_PARAM(exec);
 #if HAVE(TM_GMTOFF)
         utcOffset = static_cast<int>(inTm.tm_gmtoff);
 #else
-        utcOffset = static_cast<int>(getUTCOffset() / msPerSecond + (isDST ? secondsPerHour : 0));
+        utcOffset = static_cast<int>(getUTCOffset(exec) / WTF::msPerSecond + (isDST ? WTF::secondsPerHour : 0));
 #endif
 
 #if HAVE(TM_ZONE)
@@ -186,7 +217,7 @@ static inline int gmtoffset(const GregorianDateTime& t)
 {
     return t.utcOffset;
 }
-
-} // namespace WTF
+} // namespace JSC
+#endif // USE(JSC)
 
 #endif // DateMath_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp
index f3ded7e..d95f078 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp
@@ -119,11 +119,13 @@ static void initializeIsForbiddenKey()
   pthread_key_create(&isForbiddenKey, 0);
 }
 
+#if !ASSERT_DISABLED
 static bool isForbidden()
 {
     pthread_once(&isForbiddenKeyOnce, initializeIsForbiddenKey);
     return !!pthread_getspecific(isForbiddenKey);
 }
+#endif
 
 void fastMallocForbid()
 {
@@ -182,6 +184,17 @@ void* fastZeroedMalloc(size_t n)
     memset(result, 0, n);
     return result;
 }
+
+char* fastStrDup(const char* src)
+{
+    int len = strlen(src) + 1;
+    char* dup = static_cast<char*>(fastMalloc(len));
+
+    if (dup)
+        memcpy(dup, src, len);
+
+    return dup;
+}
     
 TryMallocReturnValue tryFastZeroedMalloc(size_t n) 
 {
@@ -196,13 +209,6 @@ TryMallocReturnValue tryFastZeroedMalloc(size_t n)
 
 #if FORCE_SYSTEM_MALLOC
 
-#include <stdlib.h>
-#if !PLATFORM(WIN_OS)
-    #include <pthread.h>
-#else
-    #include "windows.h"
-#endif
-
 namespace WTF {
 
 TryMallocReturnValue tryFastMalloc(size_t n) 
@@ -354,7 +360,7 @@ FastMallocStatistics fastMallocStatistics()
 
 } // namespace WTF
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 // This symbol is present in the JavaScriptCore exports file even when FastMalloc is disabled.
 // It will never be used in this case, so it's type and value are less interesting than its presence.
 extern "C" const int jscore_fastmalloc_introspection = 0;
@@ -384,7 +390,7 @@ extern "C" const int jscore_fastmalloc_introspection = 0;
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdio.h>
-#if PLATFORM(UNIX)
+#if OS(UNIX)
 #include <unistd.h>
 #endif
 #if COMPILER(MSVC)
@@ -396,11 +402,15 @@ extern "C" const int jscore_fastmalloc_introspection = 0;
 
 #if WTF_CHANGES
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 #include "MallocZoneSupport.h"
 #include <wtf/HashSet.h>
 #include <wtf/Vector.h>
 #endif
+#if HAVE(DISPATCH_H)
+#include <dispatch/dispatch.h>
+#endif
+
 
 #ifndef PRIuS
 #define PRIuS "zu"
@@ -410,7 +420,7 @@ extern "C" const int jscore_fastmalloc_introspection = 0;
 // call to the function on Mac OS X, and it's used in performance-critical code. So we
 // use a function pointer. But that's not necessarily faster on other platforms, and we had
 // problems with this technique on Windows, so we'll do this only on Mac OS X.
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 static void* (*pthread_getspecific_function_pointer)(pthread_key_t) = pthread_getspecific;
 #define pthread_getspecific(key) pthread_getspecific_function_pointer(key)
 #endif
@@ -438,7 +448,7 @@ namespace WTF {
 #define MESSAGE LOG_ERROR
 #define CHECK_CONDITION ASSERT
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 class Span;
 class TCMalloc_Central_FreeListPadded;
 class TCMalloc_PageHeap;
@@ -995,7 +1005,7 @@ class PageHeapAllocator {
 
   int inuse() const { return inuse_; }
 
-#if defined(WTF_CHANGES) && PLATFORM(DARWIN)
+#if defined(WTF_CHANGES) && OS(DARWIN)
   template <class Recorder>
   void recordAdministrativeRegions(Recorder& recorder, const RemoteMemoryReader& reader)
   {
@@ -1177,7 +1187,7 @@ template <int BITS> class MapSelector {
 };
 
 #if defined(WTF_CHANGES)
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
 // On all known X86-64 platforms, the upper 16 bits are always unused and therefore 
 // can be excluded from the PageMap key.
 // See http://en.wikipedia.org/wiki/X86-64#Virtual_address_space_details
@@ -1228,7 +1238,7 @@ static const int kScavengeTimerDelayInSeconds = 5;
 static const size_t kMinimumFreeCommittedPageCount = 512;
 
 // During a scavenge, we'll release up to a fraction of the free committed pages.
-#if PLATFORM(WIN)
+#if OS(WINDOWS)
 // We are slightly less aggressive in releasing memory on Windows due to performance reasons.
 static const int kMaxScavengeAmountFactor = 3;
 #else
@@ -1377,26 +1387,34 @@ class TCMalloc_PageHeap {
   // Index of last free list we scavenged
   size_t scavenge_index_;
   
-#if defined(WTF_CHANGES) && PLATFORM(DARWIN)
+#if defined(WTF_CHANGES) && OS(DARWIN)
   friend class FastMallocZone;
 #endif
 
 #if USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
-  static NO_RETURN void* runScavengerThread(void*);
+  void initializeScavenger();
+  ALWAYS_INLINE void signalScavenger();
+  void scavenge();
+  ALWAYS_INLINE bool shouldContinueScavenging() const;
 
+#if !HAVE(DISPATCH_H)
+  static NO_RETURN void* runScavengerThread(void*);
   NO_RETURN void scavengerThread();
 
-  void scavenge();
-
-  inline bool shouldContinueScavenging() const;
+  // Keeps track of whether the background thread is actively scavenging memory every kScavengeTimerDelayInSeconds, or
+  // it's blocked waiting for more pages to be deleted.
+  bool m_scavengeThreadActive;
 
   pthread_mutex_t m_scavengeMutex;
-
   pthread_cond_t m_scavengeCondition;
+#else // !HAVE(DISPATCH_H)
+  void periodicScavenge();
+
+  dispatch_queue_t m_scavengeQueue;
+  dispatch_source_t m_scavengeTimer;
+  bool m_scavengingScheduled;
+#endif
 
-  // Keeps track of whether the background thread is actively scavenging memory every kScavengeTimerDelayInSeconds, or
-  // it's blocked waiting for more pages to be deleted.
-  bool m_scavengeThreadActive;
 #endif  // USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
 };
 
@@ -1424,24 +1442,60 @@ void TCMalloc_PageHeap::init()
   }
 
 #if USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
+  initializeScavenger();
+#endif  // USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
+}
+
+#if USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
+
+#if !HAVE(DISPATCH_H)
+
+void TCMalloc_PageHeap::initializeScavenger()
+{
   pthread_mutex_init(&m_scavengeMutex, 0);
   pthread_cond_init(&m_scavengeCondition, 0);
   m_scavengeThreadActive = true;
   pthread_t thread;
   pthread_create(&thread, 0, runScavengerThread, this);
-#endif  // USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
 }
 
-#if USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
 void* TCMalloc_PageHeap::runScavengerThread(void* context)
 {
   static_cast<TCMalloc_PageHeap*>(context)->scavengerThread();
-#if COMPILER(MSVC) || PLATFORM(SOLARIS)
+#if COMPILER(MSVC) || OS(SOLARIS)
   // Without this, Visual Studio will complain that this method does not return a value.
   return 0;
 #endif
 }
 
+ALWAYS_INLINE void TCMalloc_PageHeap::signalScavenger()
+{
+  if (!m_scavengeThreadActive && shouldContinueScavenging())
+    pthread_cond_signal(&m_scavengeCondition);
+}
+
+#else // !HAVE(DISPATCH_H)
+
+void TCMalloc_PageHeap::initializeScavenger()
+{
+  m_scavengeQueue = dispatch_queue_create("com.apple.JavaScriptCore.FastMallocSavenger", NULL);
+  m_scavengeTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, m_scavengeQueue);
+  dispatch_time_t startTime = dispatch_time(DISPATCH_TIME_NOW, kScavengeTimerDelayInSeconds * NSEC_PER_SEC);
+  dispatch_source_set_timer(m_scavengeTimer, startTime, kScavengeTimerDelayInSeconds * NSEC_PER_SEC, 1000 * NSEC_PER_USEC);
+  dispatch_source_set_event_handler(m_scavengeTimer, ^{ periodicScavenge(); });
+  m_scavengingScheduled = false;
+}
+
+ALWAYS_INLINE void TCMalloc_PageHeap::signalScavenger()
+{
+  if (!m_scavengingScheduled && shouldContinueScavenging()) {
+    m_scavengingScheduled = true;
+    dispatch_resume(m_scavengeTimer);
+  }
+}
+
+#endif
+
 void TCMalloc_PageHeap::scavenge() 
 {
     // If we have to commit memory in the last 5 seconds, it means we don't have enough free committed pages
@@ -1477,7 +1531,7 @@ void TCMalloc_PageHeap::scavenge()
     free_committed_pages_ -= pagesDecommitted;
 }
 
-inline bool TCMalloc_PageHeap::shouldContinueScavenging() const 
+ALWAYS_INLINE bool TCMalloc_PageHeap::shouldContinueScavenging() const 
 {
     return free_committed_pages_ > kMinimumFreeCommittedPageCount; 
 }
@@ -1739,8 +1793,7 @@ inline void TCMalloc_PageHeap::Delete(Span* span) {
   }
 
   // Make sure the scavenge thread becomes active if we have enough freed pages to release some back to the system.
-  if (!m_scavengeThreadActive && shouldContinueScavenging())
-      pthread_cond_signal(&m_scavengeCondition);
+  signalScavenger();
 #else
   IncrementalScavenge(n);
 #endif
@@ -2283,7 +2336,9 @@ static inline TCMalloc_PageHeap* getPageHeap()
 #define pageheap getPageHeap()
 
 #if USE_BACKGROUND_THREAD_TO_SCAVENGE_MEMORY
-#if PLATFORM(WIN_OS)
+
+#if !HAVE(DISPATCH_H)
+#if OS(WINDOWS)
 static void sleep(unsigned seconds)
 {
     ::Sleep(seconds * 1000);
@@ -2312,6 +2367,23 @@ void TCMalloc_PageHeap::scavengerThread()
       }
   }
 }
+
+#else
+
+void TCMalloc_PageHeap::periodicScavenge()
+{
+  {
+    SpinLockHolder h(&pageheap_lock);
+    pageheap->scavenge();
+  }
+
+  if (!shouldContinueScavenging()) {
+    m_scavengingScheduled = false;
+    dispatch_suspend(m_scavengeTimer);
+  }
+}
+#endif // HAVE(DISPATCH_H)
+
 #endif
 
 // If TLS is available, we also store a copy
@@ -2821,7 +2893,7 @@ void TCMalloc_ThreadCache::InitModule() {
     }
     pageheap->init();
     phinited = 1;
-#if defined(WTF_CHANGES) && PLATFORM(DARWIN)
+#if defined(WTF_CHANGES) && OS(DARWIN)
     FastMallocZone::init();
 #endif
   }
@@ -3800,7 +3872,7 @@ void* realloc(void* old_ptr, size_t new_size) {
     return new_ptr;
   } else {
 #if ENABLE(FAST_MALLOC_MATCH_VALIDATION)
-    old_ptr = pByte + sizeof(AllocAlignmentInteger);  // Set old_ptr back to the user pointer.
+    old_ptr = static_cast<AllocAlignmentInteger*>(old_ptr) + 1; // Set old_ptr back to the user pointer.
 #endif
     return old_ptr;
   }
@@ -4019,7 +4091,7 @@ void *(*__memalign_hook)(size_t, size_t, const void *) = MemalignOverride;
 
 #endif
 
-#if defined(WTF_CHANGES) && PLATFORM(DARWIN)
+#if defined(WTF_CHANGES) && OS(DARWIN)
 
 class FreeObjectFinder {
     const RemoteMemoryReader& m_reader;
@@ -4302,7 +4374,7 @@ extern "C" {
 malloc_introspection_t jscore_fastmalloc_introspection = { &FastMallocZone::enumerate, &FastMallocZone::goodSize, &FastMallocZone::check, &FastMallocZone::print,
     &FastMallocZone::log, &FastMallocZone::forceLock, &FastMallocZone::forceUnlock, &FastMallocZone::statistics
 
-#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !PLATFORM(IPHONE)
+#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !OS(IPHONE_OS)
     , 0 // zone_locked will not be called on the zone unless it advertises itself as version five or higher.
 #endif
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.h
index ca0961c..74d4307 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.h
@@ -33,6 +33,7 @@ namespace WTF {
     void* fastZeroedMalloc(size_t);
     void* fastCalloc(size_t numElements, size_t elementSize);
     void* fastRealloc(void*, size_t);
+    char* fastStrDup(const char*);
 
     struct TryMallocReturnValue {
         TryMallocReturnValue(void* data)
@@ -188,17 +189,18 @@ using WTF::tryFastZeroedMalloc;
 using WTF::tryFastCalloc;
 using WTF::tryFastRealloc;
 using WTF::fastFree;
+using WTF::fastStrDup;
 
 #ifndef NDEBUG    
 using WTF::fastMallocForbid;
 using WTF::fastMallocAllow;
 #endif
 
-#if COMPILER(GCC) && PLATFORM(DARWIN)
+#if COMPILER(GCC) && OS(DARWIN)
 #define WTF_PRIVATE_INLINE __private_extern__ inline __attribute__((always_inline))
 #elif COMPILER(GCC)
 #define WTF_PRIVATE_INLINE inline __attribute__((always_inline))
-#elif COMPILER(MSVC)
+#elif COMPILER(MSVC) || COMPILER(RVCT)
 #define WTF_PRIVATE_INLINE __forceinline
 #else
 #define WTF_PRIVATE_INLINE inline
@@ -216,14 +218,21 @@ using WTF::fastMallocAllow;
 // We musn't customize the global operator new and delete for the Qt port.
 #if !PLATFORM(QT)
 
-WTF_PRIVATE_INLINE void* operator new(size_t size) { return fastMalloc(size); }
+#if COMPILER(MSVC)
+#pragma warning(push)
+#pragma warning(disable: 4290) // Disable the C++ exception specification ignored warning.
+#endif
+WTF_PRIVATE_INLINE void* operator new(size_t size) throw (std::bad_alloc) { return fastMalloc(size); }
 WTF_PRIVATE_INLINE void* operator new(size_t size, const std::nothrow_t&) throw() { return fastMalloc(size); }
-WTF_PRIVATE_INLINE void operator delete(void* p) { fastFree(p); }
+WTF_PRIVATE_INLINE void operator delete(void* p) throw() { fastFree(p); }
 WTF_PRIVATE_INLINE void operator delete(void* p, const std::nothrow_t&) throw() { fastFree(p); }
-WTF_PRIVATE_INLINE void* operator new[](size_t size) { return fastMalloc(size); }
+WTF_PRIVATE_INLINE void* operator new[](size_t size) throw (std::bad_alloc) { return fastMalloc(size); }
 WTF_PRIVATE_INLINE void* operator new[](size_t size, const std::nothrow_t&) throw() { return fastMalloc(size); }
-WTF_PRIVATE_INLINE void operator delete[](void* p) { fastFree(p); }
+WTF_PRIVATE_INLINE void operator delete[](void* p) throw() { fastFree(p); }
 WTF_PRIVATE_INLINE void operator delete[](void* p, const std::nothrow_t&) throw() { fastFree(p); }
+#if COMPILER(MSVC)
+#pragma warning(pop)
+#endif
 
 #endif
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/GOwnPtr.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/GOwnPtr.cpp
deleted file mode 100644
index 432885f..0000000
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/GOwnPtr.cpp
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright (C) 2008 Collabora Ltd.
- *
- *  This library is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU Lesser General Public
- *  License as published by the Free Software Foundation; either
- *  version 2 of the License, or (at your option) any later version.
- *
- *  This library is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  Lesser General Public License for more details.
- *
- *  You should have received a copy of the GNU Lesser General Public
- *  License along with this library; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include "config.h"
-#include "GOwnPtr.h"
-
-namespace WTF {
-
-template <> void freeOwnedGPtr<GError>(GError* ptr)
-{
-    if (ptr)
-        g_error_free(ptr);
-}
-
-template <> void freeOwnedGPtr<GList>(GList* ptr)
-{
-    g_list_free(ptr);
-}
-
-template <> void freeOwnedGPtr<GCond>(GCond* ptr)
-{
-    if (ptr)
-        g_cond_free(ptr);
-}
-
-template <> void freeOwnedGPtr<GMutex>(GMutex* ptr)
-{
-    if (ptr)
-        g_mutex_free(ptr);
-}
-
-template <> void freeOwnedGPtr<GPatternSpec>(GPatternSpec* ptr)
-{
-    if (ptr)
-        g_pattern_spec_free(ptr);
-}
-
-template <> void freeOwnedGPtr<GDir>(GDir* ptr)
-{
-    if (ptr)
-        g_dir_close(ptr);
-}
-
-template <> void freeOwnedGPtr<GHashTable>(GHashTable* ptr)
-{
-    if (ptr)
-        g_hash_table_unref(ptr);
-}
-
-} // namespace WTF
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/GOwnPtr.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/GOwnPtr.h
deleted file mode 100644
index 4993348..0000000
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/GOwnPtr.h
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- *  Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
- *  Copyright (C) 2008 Collabora Ltd.
- *
- *  This library is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU Library General Public
- *  License as published by the Free Software Foundation; either
- *  version 2 of the License, or (at your option) any later version.
- *
- *  This library is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  Library General Public License for more details.
- *
- *  You should have received a copy of the GNU Library General Public License
- *  along with this library; see the file COPYING.LIB.  If not, write to
- *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- *  Boston, MA 02110-1301, USA.
- *
- */
-
-#ifndef GOwnPtr_h
-#define GOwnPtr_h
-
-#include <algorithm>
-#include <glib.h>
-#include <wtf/Assertions.h>
-#include <wtf/Noncopyable.h>
-
-namespace WTF {
-    template <typename T> inline void freeOwnedGPtr(T* ptr) { g_free(reinterpret_cast<void*>(ptr)); }
-    template<> void freeOwnedGPtr<GError>(GError*);
-    template<> void freeOwnedGPtr<GList>(GList*);
-    template<> void freeOwnedGPtr<GCond>(GCond*);
-    template<> void freeOwnedGPtr<GMutex>(GMutex*);
-    template<> void freeOwnedGPtr<GPatternSpec>(GPatternSpec*);
-    template<> void freeOwnedGPtr<GDir>(GDir*);
-    template<> void freeOwnedGPtr<GHashTable>(GHashTable*);
-
-    template <typename T> class GOwnPtr : public Noncopyable {
-    public:
-        explicit GOwnPtr(T* ptr = 0) : m_ptr(ptr) { }
-        ~GOwnPtr() { freeOwnedGPtr(m_ptr); }
-
-        T* get() const { return m_ptr; }
-        T* release() { T* ptr = m_ptr; m_ptr = 0; return ptr; }
-        T*& outPtr() { ASSERT(!m_ptr); return m_ptr; }
-
-        void set(T* ptr) { ASSERT(!ptr || m_ptr != ptr); freeOwnedGPtr(m_ptr); m_ptr = ptr; }
-        void clear() { freeOwnedGPtr(m_ptr); m_ptr = 0; }
-
-        T& operator*() const { ASSERT(m_ptr); return *m_ptr; }
-        T* operator->() const { ASSERT(m_ptr); return m_ptr; }
-
-        bool operator!() const { return !m_ptr; }
-
-        // This conversion operator allows implicit conversion to bool but not to other integer types.
-        typedef T* GOwnPtr::*UnspecifiedBoolType;
-        operator UnspecifiedBoolType() const { return m_ptr ? &GOwnPtr::m_ptr : 0; }
-
-        void swap(GOwnPtr& o) { std::swap(m_ptr, o.m_ptr); }
-
-    private:
-        T* m_ptr;
-    };
-    
-    template <typename T> inline void swap(GOwnPtr<T>& a, GOwnPtr<T>& b) { a.swap(b); }
-
-    template <typename T, typename U> inline bool operator==(const GOwnPtr<T>& a, U* b)
-    { 
-        return a.get() == b; 
-    }
-    
-    template <typename T, typename U> inline bool operator==(T* a, const GOwnPtr<U>& b) 
-    {
-        return a == b.get(); 
-    }
-
-    template <typename T, typename U> inline bool operator!=(const GOwnPtr<T>& a, U* b)
-    {
-        return a.get() != b; 
-    }
-
-    template <typename T, typename U> inline bool operator!=(T* a, const GOwnPtr<U>& b)
-    { 
-        return a != b.get(); 
-    }
-    
-    template <typename T> inline typename GOwnPtr<T>::PtrType getPtr(const GOwnPtr<T>& p)
-    {
-        return p.get();
-    }
-
-} // namespace WTF
-
-using WTF::GOwnPtr;
-
-#endif // GOwnPtr_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashCountedSet.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashCountedSet.h
index 5fb6da8..165eb41 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashCountedSet.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashCountedSet.h
@@ -65,8 +65,8 @@ namespace WTF {
         void remove(iterator);
  
         // removes the value, regardless of its count
-        void clear(iterator);
-        void clear(const ValueType&);
+        void removeAll(iterator);
+        void removeAll(const ValueType&);
 
         // clears the whole set
         void clear();
@@ -171,13 +171,13 @@ namespace WTF {
     }
     
     template<typename Value, typename HashFunctions, typename Traits>
-    inline void HashCountedSet<Value, HashFunctions, Traits>::clear(const ValueType& value)
+    inline void HashCountedSet<Value, HashFunctions, Traits>::removeAll(const ValueType& value)
     {
-        clear(find(value));
+        removeAll(find(value));
     }
     
     template<typename Value, typename HashFunctions, typename Traits>
-    inline void HashCountedSet<Value, HashFunctions, Traits>::clear(iterator it)
+    inline void HashCountedSet<Value, HashFunctions, Traits>::removeAll(iterator it)
     {
         if (it == end())
             return;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashFunctions.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashFunctions.h
index 13afb72..2c66a2d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashFunctions.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashFunctions.h
@@ -173,9 +173,6 @@ namespace WTF {
     template<typename P> struct DefaultHash<RefPtr<P> > { typedef PtrHash<RefPtr<P> > Hash; };
 
     template<typename T, typename U> struct DefaultHash<std::pair<T, U> > { typedef PairHash<T, U> Hash; };
-    
-    // Golden ratio - arbitrary start value to avoid mapping all 0's to all 0's
-    static const unsigned stringHashingStartValue = 0x9e3779b9U;
 
 } // namespace WTF
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashMap.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashMap.h
index 8ff9170..de4743a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashMap.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashMap.h
@@ -83,6 +83,23 @@ namespace WTF {
 
         MappedType take(const KeyType&); // efficient combination of get with remove
 
+        // An alternate version of find() that finds the object by hashing and comparing
+        // with some other type, to avoid the cost of type conversion. HashTranslator
+        // must have the following function members:
+        //   static unsigned hash(const T&);
+        //   static bool equal(const ValueType&, const T&);
+        template<typename T, typename HashTranslator> iterator find(const T&);
+        template<typename T, typename HashTranslator> const_iterator find(const T&) const;
+        template<typename T, typename HashTranslator> bool contains(const T&) const;
+
+        // An alternate version of add() that finds the object by hashing and comparing
+        // with some other type, to avoid the cost of type conversion if the object is already
+        // in the table. HashTranslator must have the following function members:
+        //   static unsigned hash(const T&);
+        //   static bool equal(const ValueType&, const T&);
+        //   static translate(ValueType&, const T&, unsigned hashCode);
+        template<typename T, typename HashTranslator> pair<iterator, bool> add(const T&, const MappedType&);
+
     private:
         pair<iterator, bool> inlineAdd(const KeyType&, const MappedType&);
 
@@ -107,6 +124,19 @@ namespace WTF {
         }
     };
 
+    template<typename ValueType, typename ValueTraits, typename T, typename Translator>
+    struct HashMapTranslatorAdapter {
+        typedef typename ValueType::first_type KeyType;
+        typedef typename ValueType::second_type MappedType;
+
+        static unsigned hash(const T& key) { return Translator::hash(key); }
+        static bool equal(const KeyType& a, const T& b) { return Translator::equal(a, b); }
+        static void translate(ValueType& location, const T& key, const MappedType&, unsigned hashCode)
+        {
+            Translator::translate(location.first, key, hashCode);
+        }
+    };
+
     template<typename T, typename U, typename V, typename W, typename X>
     inline void HashMap<T, U, V, W, X>::swap(HashMap& other)
     {
@@ -174,6 +204,33 @@ namespace WTF {
     }
 
     template<typename T, typename U, typename V, typename W, typename X>
+    template<typename TYPE, typename HashTranslator>
+    inline typename HashMap<T, U, V, W, X>::iterator
+    HashMap<T, U, V, W, X>::find(const TYPE& value)
+    {
+        typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter;
+        return m_impl.template find<TYPE, Adapter>(value);
+    }
+
+    template<typename T, typename U, typename V, typename W, typename X>
+    template<typename TYPE, typename HashTranslator>
+    inline typename HashMap<T, U, V, W, X>::const_iterator 
+    HashMap<T, U, V, W, X>::find(const TYPE& value) const
+    {
+        typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter;
+        return m_impl.template find<TYPE, Adapter>(value);
+    }
+
+    template<typename T, typename U, typename V, typename W, typename X>
+    template<typename TYPE, typename HashTranslator>
+    inline bool
+    HashMap<T, U, V, W, X>::contains(const TYPE& value) const
+    {
+        typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter;
+        return m_impl.template contains<TYPE, Adapter>(value);
+    }
+
+    template<typename T, typename U, typename V, typename W, typename X>
     inline pair<typename HashMap<T, U, V, W, X>::iterator, bool>
     HashMap<T, U, V, W, X>::inlineAdd(const KeyType& key, const MappedType& mapped) 
     {
@@ -197,6 +254,15 @@ namespace WTF {
     }
 
     template<typename T, typename U, typename V, typename W, typename X>
+    template<typename TYPE, typename HashTranslator>
+    pair<typename HashMap<T, U, V, W, X>::iterator, bool>
+    HashMap<T, U, V, W, X>::add(const TYPE& key, const MappedType& value)
+    {
+        typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter;
+        return m_impl.template addPassingHashCode<TYPE, MappedType, Adapter>(key, value);
+    }
+
+    template<typename T, typename U, typename V, typename W, typename X>
     pair<typename HashMap<T, U, V, W, X>::iterator, bool>
     HashMap<T, U, V, W, X>::add(const KeyType& key, const MappedType& mapped)
     {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashSet.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashSet.h
index 3906a36..e56e384 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashSet.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashSet.h
@@ -81,7 +81,7 @@ namespace WTF {
 
         // An alternate version of add() that finds the object by hashing and comparing
         // with some other type, to avoid the cost of type conversion if the object is already
-        // in the table. HashTranslator must have the following methods:
+        // in the table. HashTranslator must have the following function members:
         //   static unsigned hash(const T&);
         //   static bool equal(const ValueType&, const T&);
         //   static translate(ValueType&, const T&, unsigned hashCode);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashTable.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashTable.h
index 3b283f8..92533fa 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashTable.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/HashTable.h
@@ -197,7 +197,7 @@ namespace WTF {
         void checkValidity(const const_iterator& other) const
         {
             ASSERT(m_table);
-            ASSERT(other.m_table);
+            ASSERT_UNUSED(other, other.m_table);
             ASSERT(m_table == other.m_table);
         }
 #else
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListHashSet.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListHashSet.h
index 38cc998..54ed36b 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListHashSet.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListHashSet.h
@@ -51,7 +51,7 @@ namespace WTF {
     template<typename ValueArg> struct ListHashSetNodeAllocator;
     template<typename ValueArg, typename HashArg> struct ListHashSetNodeHashFunctions;
 
-    template<typename ValueArg, typename HashArg = typename DefaultHash<ValueArg>::Hash> class ListHashSet {
+    template<typename ValueArg, typename HashArg = typename DefaultHash<ValueArg>::Hash> class ListHashSet : public FastAllocBase {
     private:
         typedef ListHashSetNode<ValueArg> Node;
         typedef ListHashSetNodeAllocator<ValueArg> NodeAllocator;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListRefPtr.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListRefPtr.h
index d863226..8bf6447 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListRefPtr.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ListRefPtr.h
@@ -44,6 +44,9 @@ namespace WTF {
         template <typename U> ListRefPtr& operator=(const PassRefPtr<U>& o) { RefPtr<T>::operator=(o); return *this; }
     };
 
+    // Remove inline for winscw compiler to prevent the compiler agressively resolving
+    // T::ref() in RefPtr<T>'s copy constructor.  The bug is reported at:
+    // https://xdabug001.ext.nokia.com/bugzilla/show_bug.cgi?id=9812.
     template <typename T> 
 #if !COMPILER(WINSCW)
     inline
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.cpp
index e999094..40a4ae5 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.cpp
@@ -39,10 +39,12 @@ namespace WTF {
 struct FunctionWithContext {
     MainThreadFunction* function;
     void* context;
+    ThreadCondition* syncFlag;
 
-    FunctionWithContext(MainThreadFunction* function = 0, void* context = 0)
+    FunctionWithContext(MainThreadFunction* function = 0, void* context = 0, ThreadCondition* syncFlag = 0)
         : function(function)
         , context(context)
+        , syncFlag(syncFlag)
     { 
     }
 };
@@ -92,6 +94,8 @@ void dispatchFunctionsFromMainThread()
         }
 
         invocation.function(invocation.context);
+        if (invocation.syncFlag)
+            invocation.syncFlag->signal();
 
         // If we are running accumulated functions for too long so UI may become unresponsive, we need to
         // yield so the user input can be processed. Otherwise user may not be able to even close the window.
@@ -117,6 +121,24 @@ void callOnMainThread(MainThreadFunction* function, void* context)
         scheduleDispatchFunctionsOnMainThread();
 }
 
+void callOnMainThreadAndWait(MainThreadFunction* function, void* context)
+{
+    ASSERT(function);
+
+    if (isMainThread()) {
+        function(context);
+        return;
+    }
+
+    ThreadCondition syncFlag;
+    Mutex& functionQueueMutex = mainThreadFunctionQueueMutex();
+    MutexLocker locker(functionQueueMutex);
+    functionQueue().append(FunctionWithContext(function, context, &syncFlag));
+    if (functionQueue().size() == 1)
+        scheduleDispatchFunctionsOnMainThread();
+    syncFlag.wait(functionQueueMutex);
+}
+
 void setMainThreadCallbacksPaused(bool paused)
 {
     ASSERT(isMainThread());
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.h
index b8305b5..11a5eb1 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MainThread.h
@@ -40,6 +40,9 @@ extern "C" {
 
 void callOnMainThread(MainThreadFunction*, void* context);
 
+// Blocks the thread until the call finishes on the main thread. Misusing this can easily cause deadlocks.
+void callOnMainThreadAndWait(MainThreadFunction*, void* context);
+
 void setMainThreadCallbacksPaused(bool paused);
 
 // Must be called from the main thread (Darwin is an exception to this rule).
@@ -54,6 +57,7 @@ void dispatchFunctionsFromMainThread();
 } // namespace WTF
 
 using WTF::callOnMainThread;
+using WTF::callOnMainThreadAndWait;
 using WTF::setMainThreadCallbacksPaused;
 
 #endif // MainThread_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h
index 324300d..9ea57fd 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h
@@ -26,28 +26,24 @@
 #ifndef WTF_MathExtras_h
 #define WTF_MathExtras_h
 
+#include <float.h>
 #include <math.h>
 #include <stdlib.h>
 
-#if PLATFORM(SOLARIS)
+#if OS(SOLARIS)
 #include <ieeefp.h>
 #endif
 
-#if PLATFORM(OPENBSD)
+#if OS(OPENBSD)
 #include <sys/types.h>
 #include <machine/ieee.h>
 #endif
 
 #if COMPILER(MSVC)
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 #include <stdlib.h>
 #endif
 #include <limits>
-
-#if HAVE(FLOAT_H)
-#include <float.h>
-#endif
-
 #endif
 
 #ifndef M_PI
@@ -66,7 +62,7 @@ const double piOverFourDouble = M_PI_4;
 const float piOverFourFloat = static_cast<float>(M_PI_4);
 #endif
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 
 // Work around a bug in the Mac OS X libc where ceil(-0.1) return +0.
 inline double wtf_ceil(double x) { return copysign(ceil(x), x); }
@@ -75,7 +71,7 @@ inline double wtf_ceil(double x) { return copysign(ceil(x), x); }
 
 #endif
 
-#if PLATFORM(SOLARIS)
+#if OS(SOLARIS)
 
 #ifndef isfinite
 inline bool isfinite(double x) { return finite(x) && !isnand(x); }
@@ -89,7 +85,7 @@ inline bool signbit(double x) { return x < 0.0; } // FIXME: Wrong for negative 0
 
 #endif
 
-#if PLATFORM(OPENBSD)
+#if OS(OPENBSD)
 
 #ifndef isfinite
 inline bool isfinite(double x) { return finite(x); }
@@ -102,6 +98,8 @@ inline bool signbit(double x) { struct ieee_double *p = (struct ieee_double *)&x
 
 #if COMPILER(MSVC) || COMPILER(RVCT)
 
+inline long long llround(double num) { return static_cast<long long>(num > 0 ? num + 0.5 : ceil(num - 0.5)); }
+inline long long llroundf(float num) { return static_cast<long long>(num > 0 ? num + 0.5f : ceil(num - 0.5f)); }
 inline long lround(double num) { return static_cast<long>(num > 0 ? num + 0.5 : ceil(num - 0.5)); }
 inline long lroundf(float num) { return static_cast<long>(num > 0 ? num + 0.5f : ceilf(num - 0.5f)); }
 inline double round(double num) { return num > 0 ? floor(num + 0.5) : ceil(num - 0.5); }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MessageQueue.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MessageQueue.h
index 070b76c..48bd10a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MessageQueue.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MessageQueue.h
@@ -41,23 +41,31 @@ namespace WTF {
     enum MessageQueueWaitResult {
         MessageQueueTerminated,       // Queue was destroyed while waiting for message.
         MessageQueueTimeout,          // Timeout was specified and it expired.
-        MessageQueueMessageReceived   // A message was successfully received and returned.
+        MessageQueueMessageReceived,  // A message was successfully received and returned.
     };
 
+    // The queue takes ownership of messages and transfer it to the new owner
+    // when messages are fetched from the queue.
+    // Essentially, MessageQueue acts as a queue of OwnPtr<DataType>.
     template<typename DataType>
     class MessageQueue : public Noncopyable {
     public:
         MessageQueue() : m_killed(false) { }
-        
-        void append(const DataType&);
-        bool appendAndCheckEmpty(const DataType&);
-        void prepend(const DataType&);
-        bool waitForMessage(DataType&);
+        ~MessageQueue();
+
+        void append(PassOwnPtr<DataType>);
+        bool appendAndCheckEmpty(PassOwnPtr<DataType>);
+        void prepend(PassOwnPtr<DataType>);
+
+        PassOwnPtr<DataType> waitForMessage();
+        PassOwnPtr<DataType> tryGetMessage();
         template<typename Predicate>
-        MessageQueueWaitResult waitForMessageFilteredWithTimeout(DataType&, Predicate&, double absoluteTime);
-        void kill();
+        PassOwnPtr<DataType> waitForMessageFilteredWithTimeout(MessageQueueWaitResult&, Predicate&, double absoluteTime);
+
+        template<typename Predicate>
+        void removeIf(Predicate&);
 
-        bool tryGetMessage(DataType&);
+        void kill();
         bool killed() const;
 
         // The result of isEmpty() is only valid if no other thread is manipulating the queue at the same time.
@@ -66,86 +74,115 @@ namespace WTF {
         static double infiniteTime() { return std::numeric_limits<double>::max(); }
 
     private:
-        static bool alwaysTruePredicate(DataType&) { return true; }
+        static bool alwaysTruePredicate(DataType*) { return true; }
 
         mutable Mutex m_mutex;
         ThreadCondition m_condition;
-        Deque<DataType> m_queue;
+        Deque<DataType*> m_queue;
         bool m_killed;
     };
 
     template<typename DataType>
-    inline void MessageQueue<DataType>::append(const DataType& message)
+    MessageQueue<DataType>::~MessageQueue()
+    {
+        deleteAllValues(m_queue);
+    }
+
+    template<typename DataType>
+    inline void MessageQueue<DataType>::append(PassOwnPtr<DataType> message)
     {
         MutexLocker lock(m_mutex);
-        m_queue.append(message);
+        m_queue.append(message.release());
         m_condition.signal();
     }
 
     // Returns true if the queue was empty before the item was added.
     template<typename DataType>
-    inline bool MessageQueue<DataType>::appendAndCheckEmpty(const DataType& message)
+    inline bool MessageQueue<DataType>::appendAndCheckEmpty(PassOwnPtr<DataType> message)
     {
         MutexLocker lock(m_mutex);
         bool wasEmpty = m_queue.isEmpty();
-        m_queue.append(message);
+        m_queue.append(message.release());
         m_condition.signal();
         return wasEmpty;
     }
 
     template<typename DataType>
-    inline void MessageQueue<DataType>::prepend(const DataType& message)
+    inline void MessageQueue<DataType>::prepend(PassOwnPtr<DataType> message)
     {
         MutexLocker lock(m_mutex);
-        m_queue.prepend(message);
+        m_queue.prepend(message.release());
         m_condition.signal();
     }
 
     template<typename DataType>
-    inline bool MessageQueue<DataType>::waitForMessage(DataType& result)
+    inline PassOwnPtr<DataType> MessageQueue<DataType>::waitForMessage()
     {
-        MessageQueueWaitResult exitReason = waitForMessageFilteredWithTimeout(result, MessageQueue<DataType>::alwaysTruePredicate, infiniteTime());
+        MessageQueueWaitResult exitReason; 
+        PassOwnPtr<DataType> result = waitForMessageFilteredWithTimeout(exitReason, MessageQueue<DataType>::alwaysTruePredicate, infiniteTime());
         ASSERT(exitReason == MessageQueueTerminated || exitReason == MessageQueueMessageReceived);
-        return exitReason == MessageQueueMessageReceived;
+        return result;
     }
 
     template<typename DataType>
     template<typename Predicate>
-    inline MessageQueueWaitResult MessageQueue<DataType>::waitForMessageFilteredWithTimeout(DataType& result, Predicate& predicate, double absoluteTime)
+    inline PassOwnPtr<DataType> MessageQueue<DataType>::waitForMessageFilteredWithTimeout(MessageQueueWaitResult& result, Predicate& predicate, double absoluteTime)
     {
         MutexLocker lock(m_mutex);
         bool timedOut = false;
 
-        DequeConstIterator<DataType> found = m_queue.end();
+        DequeConstIterator<DataType*> found = m_queue.end();
         while (!m_killed && !timedOut && (found = m_queue.findIf(predicate)) == m_queue.end())
             timedOut = !m_condition.timedWait(m_mutex, absoluteTime);
 
         ASSERT(!timedOut || absoluteTime != infiniteTime());
 
-        if (m_killed)
-            return MessageQueueTerminated;
+        if (m_killed) {
+            result = MessageQueueTerminated;
+            return 0;
+        }
 
-        if (timedOut)
-            return MessageQueueTimeout;
+        if (timedOut) {
+            result = MessageQueueTimeout;
+            return 0;
+        }
 
         ASSERT(found != m_queue.end());
-        result = *found;
+        DataType* message = *found;
         m_queue.remove(found);
-        return MessageQueueMessageReceived;
+        result = MessageQueueMessageReceived;
+        return message;
     }
 
     template<typename DataType>
-    inline bool MessageQueue<DataType>::tryGetMessage(DataType& result)
+    inline PassOwnPtr<DataType> MessageQueue<DataType>::tryGetMessage()
     {
         MutexLocker lock(m_mutex);
         if (m_killed)
-            return false;
+            return 0;
         if (m_queue.isEmpty())
-            return false;
+            return 0;
 
-        result = m_queue.first();
+        DataType* message = m_queue.first();
         m_queue.removeFirst();
-        return true;
+        return message;
+    }
+
+    template<typename DataType>
+    template<typename Predicate>
+    inline void MessageQueue<DataType>::removeIf(Predicate& predicate)
+    {
+        MutexLocker lock(m_mutex);
+        // See bug 31657 for why this loop looks so weird
+        while (true) {
+            DequeConstIterator<DataType*> found = m_queue.findIf(predicate);
+            if (found == m_queue.end())
+                break;
+
+            DataType* message = *found;
+            m_queue.remove(found);
+            delete message;
+       }
     }
 
     template<typename DataType>
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PassRefPtr.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PassRefPtr.h
index ae398d3..36ba78e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PassRefPtr.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PassRefPtr.h
@@ -42,20 +42,10 @@ namespace WTF {
             ptr->deref();
     }
 
-    template<typename T>
-#if !COMPILER(WINSCW)
-    inline
-#endif
-    void refIfNotNull(T* ptr)
-    {
-        if (UNLIKELY(ptr != 0))
-            ptr->ref();
-    }
-
     template<typename T> class PassRefPtr {
     public:
         PassRefPtr() : m_ptr(0) {}
-        PassRefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
+        PassRefPtr(T* ptr) : m_ptr(ptr) { if (ptr) ptr->ref(); }
         // It somewhat breaks the type system to allow transfer of ownership out of
         // a const PassRefPtr. However, it makes it much easier to work with PassRefPtr
         // temporaries, and we don't really have a need to use real const PassRefPtrs 
@@ -63,14 +53,14 @@ namespace WTF {
         PassRefPtr(const PassRefPtr& o) : m_ptr(o.releaseRef()) {}
         template <typename U> PassRefPtr(const PassRefPtr<U>& o) : m_ptr(o.releaseRef()) { }
 
-        ALWAYS_INLINE ~PassRefPtr() { derefIfNotNull(m_ptr); }
+        ALWAYS_INLINE ~PassRefPtr() { derefIfNotNull<T>(m_ptr); }
 
         template <class U> 
-        PassRefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { T* ptr = m_ptr; refIfNotNull(ptr); }
+        PassRefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { if (T* ptr = m_ptr) ptr->ref(); }
         
         T* get() const { return m_ptr; }
 
-        void clear() { T* ptr = m_ptr; derefIfNotNull(ptr); m_ptr = 0; }
+        void clear() { if (T* ptr = m_ptr) ptr->deref(); m_ptr = 0; }
         T* releaseRef() const { T* tmp = m_ptr; m_ptr = 0; return tmp; }
 
         T& operator*() const { return *m_ptr; }
@@ -79,7 +69,6 @@ namespace WTF {
         bool operator!() const { return !m_ptr; }
 
         // This conversion operator allows implicit conversion to bool but not to other integer types.
-        // Parenthesis is needed for winscw compiler to resolve class qualifier in this case.
         typedef T* (PassRefPtr::*UnspecifiedBoolType);
         operator UnspecifiedBoolType() const { return m_ptr ? &PassRefPtr::m_ptr : 0; }
 
@@ -95,22 +84,82 @@ namespace WTF {
         mutable T* m_ptr;
     };
     
+    // NonNullPassRefPtr: Optimized for passing non-null pointers. A NonNullPassRefPtr
+    // begins life non-null, and can only become null through a call to releaseRef()
+    // or clear().
+
+    // FIXME: NonNullPassRefPtr could just inherit from PassRefPtr. However,
+    // if we use inheritance, GCC's optimizer fails to realize that destruction
+    // of a released NonNullPassRefPtr is a no-op. So, for now, just copy the
+    // most important code from PassRefPtr.
+    template <typename T> class NonNullPassRefPtr {
+    public:
+        NonNullPassRefPtr(T* ptr)
+            : m_ptr(ptr)
+        {
+            ASSERT(m_ptr);
+            m_ptr->ref();
+        }
+
+        template <class U> NonNullPassRefPtr(const RefPtr<U>& o)
+            : m_ptr(o.get())
+        {
+            ASSERT(m_ptr);
+            m_ptr->ref();
+        }
+
+        NonNullPassRefPtr(const NonNullPassRefPtr& o)
+            : m_ptr(o.releaseRef())
+        {
+            ASSERT(m_ptr);
+        }
+
+        template <class U> NonNullPassRefPtr(const NonNullPassRefPtr<U>& o)
+            : m_ptr(o.releaseRef())
+        {
+            ASSERT(m_ptr);
+        }
+
+        template <class U> NonNullPassRefPtr(const PassRefPtr<U>& o)
+            : m_ptr(o.releaseRef())
+        {
+            ASSERT(m_ptr);
+        }
+
+        ALWAYS_INLINE ~NonNullPassRefPtr() { derefIfNotNull(m_ptr); }
+
+        T* get() const { return m_ptr; }
+
+        void clear() { derefIfNotNull(m_ptr); m_ptr = 0; }
+        T* releaseRef() const { T* tmp = m_ptr; m_ptr = 0; return tmp; }
+
+        T& operator*() const { return *m_ptr; }
+        T* operator->() const { return m_ptr; }
+
+    private:
+        mutable T* m_ptr;
+    };
+
     template <typename T> template <typename U> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const RefPtr<U>& o) 
     {
         T* optr = o.get();
-        refIfNotNull(optr);
+        if (optr)
+            optr->ref();
         T* ptr = m_ptr;
         m_ptr = optr;
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
         return *this;
     }
     
     template <typename T> inline PassRefPtr<T>& PassRefPtr<T>::operator=(T* optr)
     {
-        refIfNotNull(optr);
+        if (optr)
+            optr->ref();
         T* ptr = m_ptr;
         m_ptr = optr;
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
         return *this;
     }
 
@@ -118,7 +167,8 @@ namespace WTF {
     {
         T* ptr = m_ptr;
         m_ptr = ref.releaseRef();
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
         return *this;
     }
     
@@ -126,7 +176,8 @@ namespace WTF {
     {
         T* ptr = m_ptr;
         m_ptr = ref.releaseRef();
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
         return *this;
     }
     
@@ -203,6 +254,7 @@ namespace WTF {
 } // namespace WTF
 
 using WTF::PassRefPtr;
+using WTF::NonNullPassRefPtr;
 using WTF::adoptRef;
 using WTF::static_pointer_cast;
 using WTF::const_pointer_cast;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h
index be74e2a..ec9a1e3 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h
@@ -27,163 +27,451 @@
 #ifndef WTF_Platform_h
 #define WTF_Platform_h
 
-/* PLATFORM handles OS, operating environment, graphics API, and CPU */
+/* ==== PLATFORM handles OS, operating environment, graphics API, and
+   CPU. This macro will be phased out in favor of platform adaptation
+   macros, policy decision macros, and top-level port definitions. ==== */
 #define PLATFORM(WTF_FEATURE) (defined WTF_PLATFORM_##WTF_FEATURE  && WTF_PLATFORM_##WTF_FEATURE)
+
+
+/* ==== Platform adaptation macros: these describe properties of the target environment. ==== */
+
+/* COMPILER() - the compiler being used to build the project */
 #define COMPILER(WTF_FEATURE) (defined WTF_COMPILER_##WTF_FEATURE  && WTF_COMPILER_##WTF_FEATURE)
+/* CPU() - the target CPU architecture */
+#define CPU(WTF_FEATURE) (defined WTF_CPU_##WTF_FEATURE  && WTF_CPU_##WTF_FEATURE)
+/* HAVE() - specific system features (headers, functions or similar) that are present or not */
 #define HAVE(WTF_FEATURE) (defined HAVE_##WTF_FEATURE  && HAVE_##WTF_FEATURE)
+/* OS() - underlying operating system; only to be used for mandated low-level services like 
+   virtual memory, not to choose a GUI toolkit */
+#define OS(WTF_FEATURE) (defined WTF_OS_##WTF_FEATURE  && WTF_OS_##WTF_FEATURE)
+
+
+/* ==== Policy decision macros: these define policy choices for a particular port. ==== */
+
+/* USE() - use a particular third-party library or optional OS service */
 #define USE(WTF_FEATURE) (defined WTF_USE_##WTF_FEATURE  && WTF_USE_##WTF_FEATURE)
+/* ENABLE() - turn on a specific feature of WebKit */
 #define ENABLE(WTF_FEATURE) (defined ENABLE_##WTF_FEATURE  && ENABLE_##WTF_FEATURE)
 
-/* Operating systems - low-level dependencies */
 
-/* PLATFORM(DARWIN) */
-/* Operating system level dependencies for Mac OS X / Darwin that should */
-/* be used regardless of operating environment */
-#ifdef __APPLE__
-#define WTF_PLATFORM_DARWIN 1
-#include <AvailabilityMacros.h>
-#if !defined(MAC_OS_X_VERSION_10_5) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5
-#define BUILDING_ON_TIGER 1
-#elif !defined(MAC_OS_X_VERSION_10_6) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
-#define BUILDING_ON_LEOPARD 1
+
+/* ==== COMPILER() - the compiler being used to build the project ==== */
+
+/* COMPILER(MSVC) Microsoft Visual C++ */
+/* COMPILER(MSVC7) Microsoft Visual C++ v7 or lower*/
+#if defined(_MSC_VER)
+#define WTF_COMPILER_MSVC 1
+#if _MSC_VER < 1400
+#define WTF_COMPILER_MSVC7 1
 #endif
-#include <TargetConditionals.h>
 #endif
 
-/* PLATFORM(WIN_OS) */
-/* Operating system level dependencies for Windows that should be used */
-/* regardless of operating environment */
-#if defined(WIN32) || defined(_WIN32)
-#define WTF_PLATFORM_WIN_OS 1
+/* COMPILER(RVCT)  - ARM RealView Compilation Tools */
+#if defined(__CC_ARM) || defined(__ARMCC__)
+#define WTF_COMPILER_RVCT 1
 #endif
 
-/* PLATFORM(WINCE) */
-/* Operating system level dependencies for Windows CE that should be used */
-/* regardless of operating environment */
-/* Note that for this platform PLATFORM(WIN_OS) is also defined. */
-#if defined(_WIN32_WCE)
-#define WTF_PLATFORM_WINCE 1
+/* COMPILER(GCC) - GNU Compiler Collection */
+/* --gnu option of the RVCT compiler also defines __GNUC__ */
+#if defined(__GNUC__) && !COMPILER(RVCT)
+#define WTF_COMPILER_GCC 1
+#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
 #endif
 
-/* PLATFORM(LINUX) */
-/* Operating system level dependencies for Linux-like systems that */
-/* should be used regardless of operating environment */
-#ifdef __linux__
-#define WTF_PLATFORM_LINUX 1
+/* COMPILER(MINGW) - MinGW GCC */
+#if defined(MINGW) || defined(__MINGW32__)
+#define WTF_COMPILER_MINGW 1
 #endif
 
-/* PLATFORM(FREEBSD) */
-/* Operating system level dependencies for FreeBSD-like systems that */
-/* should be used regardless of operating environment */
-#ifdef __FreeBSD__
-#define WTF_PLATFORM_FREEBSD 1
+/* COMPILER(SUNCC) - Sun CC compiler, also known as Sun Studio or Sun Pro */
+#if defined(__SUNPRO_CC) || defined(__SUNPRO_C)
+#define WTF_COMPILER_SUNCC 1
 #endif
 
-/* PLATFORM(OPENBSD) */
-/* Operating system level dependencies for OpenBSD systems that */
-/* should be used regardless of operating environment */
-#ifdef __OpenBSD__
-#define WTF_PLATFORM_OPENBSD 1
+/* COMPILER(WINSCW) - CodeWarrior for Symbian emulator */
+#if defined(__WINSCW__)
+#define WTF_COMPILER_WINSCW 1
 #endif
 
-/* PLATFORM(SOLARIS) */
-/* Operating system level dependencies for Solaris that should be used */
-/* regardless of operating environment */
-#if defined(sun) || defined(__sun)
-#define WTF_PLATFORM_SOLARIS 1
+/* COMPILER(ACC) - HP aCC */
+#if defined(__HP_aCC)
+#define WTF_COMPILER_ACC 1
+#endif
+
+/* COMPILER(XLC) - IBM XL */
+#if defined(__xlC__)
+#define WTF_COMPILER_XLC 1
+#endif
+
+
+/* ==== CPU() - the target CPU architecture ==== */
+
+/* This also defines CPU(BIG_ENDIAN) or CPU(MIDDLE_ENDIAN) or neither, as appropriate. */
+
+/* CPU(ALPHA) - DEC Alpha */
+#if defined(__alpha__)
+#define WTF_CPU_ALPHA 1
+#endif
+
+/* CPU(IA64) - Itanium / IA-64 */
+#if defined(__ia64__) || defined(__ia64) || defined(_M_IA64)
+#define WTF_CPU_IA64 1
+/* 32-bit mode on Itanium */
+#if !defined(__LP64__)
+#define WTF_CPU_IA64_32 1
+#endif
+/* Itanium can be both big- and little-endian;
+   we need to determine at compile time which one it is.
+    - HP's aCC compiler only compiles big-endian (so HP-UXi is always big-endian)
+    - GCC defines __BIG_ENDIAN__ for us (default on HP-UX)
+    - Linux is usually little-endian
+    - I've never seen AIX or Windows on IA-64, but they should be little-endian too
+*/
+#if defined(__BIG_ENDIAN__) || defined(__HP_aCC)
+# define WTF_CPU_BIG_ENDIAN 1
+#endif
+#endif
+
+/* CPU(HPPA) - a.k.a. PA-RISC */
+#if defined(__hppa) || defined(__hppa__)
+#define WTF_CPU_HPPA 1
+#define WTF_CPU_BIG_ENDIAN 1
+#endif
+
+/* CPU(PPC) - PowerPC 32-bit */
+#if   defined(__ppc__)     \
+    || defined(__PPC__)     \
+    || defined(__powerpc__) \
+    || defined(__powerpc)   \
+    || defined(__POWERPC__) \
+    || defined(_M_PPC)      \
+    || defined(__PPC)
+#define WTF_CPU_PPC 1
+#define WTF_CPU_BIG_ENDIAN 1
+#endif
+
+/* CPU(PPC64) - PowerPC 64-bit */
+#if   defined(__ppc64__) \
+    || defined(__PPC64__)
+#define WTF_CPU_PPC64 1
+#define WTF_CPU_BIG_ENDIAN 1
+#endif
+
+/* CPU(SH4) - SuperH SH-4 */
+#if defined(__SH4__)
+#define WTF_CPU_SH4 1
+#endif
+
+/* CPU(SPARC32) - SPARC 32-bit */
+#if defined(__sparc) && !defined(__arch64__) || defined(__sparcv8)
+#define WTF_CPU_SPARC32 1
+#define WTF_CPU_BIG_ENDIAN 1
+#endif
+
+/* CPU(SPARC64) - SPARC 64-bit */
+#if defined(__sparc__) && defined(__arch64__) || defined (__sparcv9)
+#define WTF_CPU_SPARC64 1
+#define WTF_CPU_BIG_ENDIAN 1
+#endif
+
+/* CPU(SPARC) - any SPARC, true for CPU(SPARC32) and CPU(SPARC64) */
+#if CPU(SPARC32) || CPU(SPARC64)
+#define WTF_CPU_SPARC
+#endif
+
+/* CPU(X86) - i386 / x86 32-bit */
+#if   defined(__i386__) \
+    || defined(i386)     \
+    || defined(_M_IX86)  \
+    || defined(_X86_)    \
+    || defined(__THW_INTEL)
+#define WTF_CPU_X86 1
+#endif
+
+/* CPU(X86_64) - AMD64 / Intel64 / x86_64 64-bit */
+#if   defined(__x86_64__) \
+    || defined(_M_X64)
+#define WTF_CPU_X86_64 1
 #endif
 
-/* PLATFORM(AIX) */
-/* Operating system level dependencies for AIX that should be used */
-/* regardless of operating environment */
-#if defined(_AIX)
-#define WTF_PLATFORM_AIX 1
 /* 64-bit mode on AIX */
 #ifdef __64BIT__
-#define WTF_PLATFORM_AIX64 1
+#define WTF_CPU_AIX64 1
+#endif
+
+/* CPU(ARM) - ARM, any version*/
+#if   defined(arm) \
+    || defined(__arm__) \
+    || defined(__MARM__)
+#define WTF_CPU_ARM 1
+
+#if defined(__ARMEB__)
+#define WTF_CPU_BIG_ENDIAN 1
+
+#elif !defined(__ARM_EABI__) \
+    && !defined(__EABI__) \
+    && !defined(__VFP_FP__) \
+    && !defined(ANDROID)
+#define WTF_CPU_MIDDLE_ENDIAN 1
+
+#endif
+
+#define WTF_ARM_ARCH_AT_LEAST(N) (CPU(ARM) && WTF_ARM_ARCH_VERSION >= N)
+
+/* Set WTF_ARM_ARCH_VERSION */
+#if   defined(__ARM_ARCH_4__) \
+    || defined(__ARM_ARCH_4T__) \
+    || defined(__MARM_ARMV4__) \
+    || defined(_ARMV4I_)
+#define WTF_ARM_ARCH_VERSION 4
+
+#elif defined(__ARM_ARCH_5__) \
+    || defined(__ARM_ARCH_5T__) \
+    || defined(__ARM_ARCH_5E__) \
+    || defined(__ARM_ARCH_5TE__) \
+    || defined(__ARM_ARCH_5TEJ__) \
+    || defined(__MARM_ARMV5__)
+#define WTF_ARM_ARCH_VERSION 5
+
+#elif defined(__ARM_ARCH_6__) \
+    || defined(__ARM_ARCH_6J__) \
+    || defined(__ARM_ARCH_6K__) \
+    || defined(__ARM_ARCH_6Z__) \
+    || defined(__ARM_ARCH_6ZK__) \
+    || defined(__ARM_ARCH_6T2__) \
+    || defined(__ARMV6__)
+#define WTF_ARM_ARCH_VERSION 6
+
+#elif defined(__ARM_ARCH_7A__) \
+    || defined(__ARM_ARCH_7R__)
+#define WTF_ARM_ARCH_VERSION 7
+
+/* RVCT sets _TARGET_ARCH_ARM */
+#elif defined(__TARGET_ARCH_ARM)
+#define WTF_ARM_ARCH_VERSION __TARGET_ARCH_ARM
+
+#else
+#define WTF_ARM_ARCH_VERSION 0
+
+#endif
+
+/* Set WTF_THUMB_ARCH_VERSION */
+#if   defined(__ARM_ARCH_4T__)
+#define WTF_THUMB_ARCH_VERSION 1
+
+#elif defined(__ARM_ARCH_5T__) \
+    || defined(__ARM_ARCH_5TE__) \
+    || defined(__ARM_ARCH_5TEJ__)
+#define WTF_THUMB_ARCH_VERSION 2
+
+#elif defined(__ARM_ARCH_6J__) \
+    || defined(__ARM_ARCH_6K__) \
+    || defined(__ARM_ARCH_6Z__) \
+    || defined(__ARM_ARCH_6ZK__) \
+    || defined(__ARM_ARCH_6M__)
+#define WTF_THUMB_ARCH_VERSION 3
+
+#elif defined(__ARM_ARCH_6T2__) \
+    || defined(__ARM_ARCH_7__) \
+    || defined(__ARM_ARCH_7A__) \
+    || defined(__ARM_ARCH_7R__) \
+    || defined(__ARM_ARCH_7M__)
+#define WTF_THUMB_ARCH_VERSION 4
+
+/* RVCT sets __TARGET_ARCH_THUMB */
+#elif defined(__TARGET_ARCH_THUMB)
+#define WTF_THUMB_ARCH_VERSION __TARGET_ARCH_THUMB
+
+#else
+#define WTF_THUMB_ARCH_VERSION 0
+#endif
+
+
+/* CPU(ARMV5_OR_LOWER) - ARM instruction set v5 or earlier */
+/* On ARMv5 and below the natural alignment is required. 
+   And there are some other differences for v5 or earlier. */
+#if !defined(ARMV5_OR_LOWER) && !WTF_ARM_ARCH_AT_LEAST(6)
+#define WTF_CPU_ARMV5_OR_LOWER 1
+#endif
+
+
+/* CPU(ARM_TRADITIONAL) - Thumb2 is not available, only traditional ARM (v4 or greater) */
+/* CPU(ARM_THUMB2) - Thumb2 instruction set is available */
+/* Only one of these will be defined. */
+#if !defined(WTF_CPU_ARM_TRADITIONAL) && !defined(WTF_CPU_ARM_THUMB2)
+#  if defined(thumb2) || defined(__thumb2__) \
+    || ((defined(__thumb) || defined(__thumb__)) && WTF_THUMB_ARCH_VERSION == 4)
+#    define WTF_CPU_ARM_TRADITIONAL 0
+#    define WTF_CPU_ARM_THUMB2 1
+#  elif WTF_ARM_ARCH_AT_LEAST(4)
+#    define WTF_CPU_ARM_TRADITIONAL 1
+#    define WTF_CPU_ARM_THUMB2 0
+#  else
+#    error "Not supported ARM architecture"
+#  endif
+#elif CPU(ARM_TRADITIONAL) && CPU(ARM_THUMB2) /* Sanity Check */
+#  error "Cannot use both of WTF_CPU_ARM_TRADITIONAL and WTF_CPU_ARM_THUMB2 platforms"
+#endif /* !defined(WTF_CPU_ARM_TRADITIONAL) && !defined(WTF_CPU_ARM_THUMB2) */
+
+#endif /* ARM */
+
+
+
+/* ==== OS() - underlying operating system; only to be used for mandated low-level services like 
+   virtual memory, not to choose a GUI toolkit ==== */
+
+/* OS(ANDROID) - Android */
+#ifdef ANDROID
+#define WTF_OS_ANDROID 1
+#endif
+
+/* OS(AIX) - AIX */
+#ifdef _AIX
+#define WTF_OS_AIX 1
+#endif
+
+/* OS(DARWIN) - Any Darwin-based OS, including Mac OS X and iPhone OS */
+#ifdef __APPLE__
+#define WTF_OS_DARWIN 1
+
+/* FIXME: BUILDING_ON_.., and TARGETING... macros should be folded into the OS() system */
+#include <AvailabilityMacros.h>
+#if !defined(MAC_OS_X_VERSION_10_5) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5
+#define BUILDING_ON_TIGER 1
+#elif !defined(MAC_OS_X_VERSION_10_6) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
+#define BUILDING_ON_LEOPARD 1
+#elif !defined(MAC_OS_X_VERSION_10_7) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
+#define BUILDING_ON_SNOW_LEOPARD 1
 #endif
+#if !defined(MAC_OS_X_VERSION_10_5) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
+#define TARGETING_TIGER 1
+#elif !defined(MAC_OS_X_VERSION_10_6) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_6
+#define TARGETING_LEOPARD 1
+#elif !defined(MAC_OS_X_VERSION_10_7) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_7
+#define TARGETING_SNOW_LEOPARD 1
+#endif
+#include <TargetConditionals.h>
+
+#endif
+
+/* OS(IPHONE_OS) - iPhone OS */
+/* OS(MAC_OS_X) - Mac OS X (not including iPhone OS) */
+#if OS(DARWIN) && ((defined(TARGET_OS_EMBEDDED) && TARGET_OS_EMBEDDED)  \
+    || (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE)                   \
+    || (defined(TARGET_IPHONE_SIMULATOR) && TARGET_IPHONE_SIMULATOR))
+#define WTF_OS_IPHONE_OS 1
+#elif OS(DARWIN) && defined(TARGET_OS_MAC) && TARGET_OS_MAC
+#define WTF_OS_MAC_OS_X 1
+#endif
+
+/* OS(FREEBSD) - FreeBSD */
+#ifdef __FreeBSD__
+#define WTF_OS_FREEBSD 1
+#endif
+
+/* OS(HAIKU) - Haiku */
+#ifdef __HAIKU__
+#define WTF_OS_HAIKU 1
 #endif
 
-/* PLATFORM(HPUX) */
-/* Operating system level dependencies for HP-UX that should be used */
-/* regardless of operating environment */
+/* OS(HPUX) - HP-UX */
 #if defined(hpux) || defined(__hpux)
-#define WTF_PLATFORM_HPUX 1
+#define WTF_OS_HPUX 1
 #ifndef MAP_ANON
 #define MAP_ANON MAP_ANONYMOUS
 #endif
 #endif
 
-#if defined (__SYMBIAN32__)
-/* we are cross-compiling, it is not really windows */
-#undef WTF_PLATFORM_WIN_OS
-#undef WTF_PLATFORM_WIN
-#define WTF_PLATFORM_SYMBIAN 1
+/* OS(LINUX) - Linux */
+#ifdef __linux__
+#define WTF_OS_LINUX 1
 #endif
 
-
-/* PLATFORM(NETBSD) */
-/* Operating system level dependencies for NetBSD that should be used */
-/* regardless of operating environment */
+/* OS(NETBSD) - NetBSD */
 #if defined(__NetBSD__)
 #define WTF_PLATFORM_NETBSD 1
 #endif
 
-/* PLATFORM(QNX) */
-/* Operating system level dependencies for QNX that should be used */
-/* regardless of operating environment */
+/* OS(OPENBSD) - OpenBSD */
+#ifdef __OpenBSD__
+#define WTF_OS_OPENBSD 1
+#endif
+
+/* OS(QNX) - QNX */
 #if defined(__QNXNTO__)
-#define WTF_PLATFORM_QNX 1
-#endif
-
-/* PLATFORM(UNIX) */
-/* Operating system level dependencies for Unix-like systems that */
-/* should be used regardless of operating environment */
-#if   PLATFORM(DARWIN)     \
-   || PLATFORM(FREEBSD)    \
-   || PLATFORM(SYMBIAN)    \
-   || PLATFORM(NETBSD)     \
-   || PLATFORM(SOLARIS)    \
-   || PLATFORM(HPUX)       \
-   || defined(unix)        \
-   || defined(__unix)      \
-   || defined(__unix__)    \
-   || PLATFORM(AIX)        \
-   || defined(__HAIKU__)   \
-   || defined(__QNXNTO__)
-#define WTF_PLATFORM_UNIX 1
+#define WTF_OS_QNX 1
+#endif
+
+/* OS(SOLARIS) - Solaris */
+#if defined(sun) || defined(__sun)
+#define WTF_OS_SOLARIS 1
+#endif
+
+/* OS(WINCE) - Windows CE; note that for this platform OS(WINDOWS) is also defined */
+#if defined(_WIN32_WCE)
+#define WTF_OS_WINCE 1
+#endif
+
+/* OS(WINDOWS) - Any version of Windows */
+#if defined(WIN32) || defined(_WIN32)
+#define WTF_OS_WINDOWS 1
+#endif
+
+/* OS(SYMBIAN) - Symbian */
+#if defined (__SYMBIAN32__)
+/* we are cross-compiling, it is not really windows */
+#undef WTF_OS_WINDOWS
+#undef WTF_PLATFORM_WIN
+#define WTF_OS_SYMBIAN 1
+#endif
+
+/* OS(UNIX) - Any Unix-like system */
+#if   OS(AIX)              \
+    || OS(ANDROID)          \
+    || OS(DARWIN)           \
+    || OS(FREEBSD)          \
+    || OS(HAIKU)            \
+    || OS(HPUX)             \
+    || OS(LINUX)            \
+    || OS(NETBSD)           \
+    || OS(OPENBSD)          \
+    || OS(QNX)              \
+    || OS(SOLARIS)          \
+    || OS(SYMBIAN)          \
+    || defined(unix)        \
+    || defined(__unix)      \
+    || defined(__unix__)
+#define WTF_OS_UNIX 1
 #endif
 
 /* Operating environments */
 
+/* FIXME: these are all mixes of OS, operating environment and policy choices. */
 /* PLATFORM(CHROMIUM) */
 /* PLATFORM(QT) */
+/* PLATFORM(WX) */
 /* PLATFORM(GTK) */
+/* PLATFORM(HAIKU) */
 /* PLATFORM(MAC) */
 /* PLATFORM(WIN) */
 #if defined(BUILDING_CHROMIUM__)
 #define WTF_PLATFORM_CHROMIUM 1
 #elif defined(BUILDING_QT__)
 #define WTF_PLATFORM_QT 1
-
-/* PLATFORM(KDE) */
-#if defined(BUILDING_KDE__)
-#define WTF_PLATFORM_KDE 1
-#endif
-
 #elif defined(BUILDING_WX__)
 #define WTF_PLATFORM_WX 1
 #elif defined(BUILDING_GTK__)
 #define WTF_PLATFORM_GTK 1
 #elif defined(BUILDING_HAIKU__)
 #define WTF_PLATFORM_HAIKU 1
-#elif PLATFORM(DARWIN)
+#elif OS(DARWIN)
 #define WTF_PLATFORM_MAC 1
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
 #define WTF_PLATFORM_WIN 1
 #endif
 
 /* PLATFORM(IPHONE) */
+/* FIXME: this is sometimes used as an OS switch and sometimes for higher-level things */
 #if (defined(TARGET_OS_EMBEDDED) && TARGET_OS_EMBEDDED) || (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE)
 #define WTF_PLATFORM_IPHONE 1
 #endif
@@ -200,6 +488,13 @@
 #define WTF_PLATFORM_IPHONE 0
 #endif
 
+/* PLATFORM(ANDROID) */
+/* FIXME: this is sometimes used as an OS() switch, and other times to drive
+   policy choices */
+#if defined(ANDROID)
+#define WTF_PLATFORM_ANDROID 1
+#endif
+
 /* Graphics engines */
 
 /* PLATFORM(CG) and PLATFORM(CI) */
@@ -212,251 +507,48 @@
 
 /* PLATFORM(SKIA) for Win/Linux, CG/CI for Mac */
 #if PLATFORM(CHROMIUM)
-#if PLATFORM(DARWIN)
+#define ENABLE_HISTORY_ALWAYS_ASYNC 1
+#if OS(DARWIN)
 #define WTF_PLATFORM_CG 1
 #define WTF_PLATFORM_CI 1
 #define WTF_USE_ATSUI 1
+#define WTF_USE_CORE_TEXT 1
 #else
 #define WTF_PLATFORM_SKIA 1
 #endif
 #endif
 
-/* Makes PLATFORM(WIN) default to PLATFORM(CAIRO) */
-/* FIXME: This should be changed from a blacklist to a whitelist */
-#if !PLATFORM(MAC) && !PLATFORM(QT) && !PLATFORM(WX) && !PLATFORM(CHROMIUM) && !PLATFORM(WINCE) && !PLATFORM(HAIKU)
+#if PLATFORM(GTK)
 #define WTF_PLATFORM_CAIRO 1
 #endif
 
-/* CPU */
-
-/* PLATFORM(PPC) */
-#if   defined(__ppc__)     \
-   || defined(__PPC__)     \
-   || defined(__powerpc__) \
-   || defined(__powerpc)   \
-   || defined(__POWERPC__) \
-   || defined(_M_PPC)      \
-   || defined(__PPC)
-#define WTF_PLATFORM_PPC 1
-#define WTF_PLATFORM_BIG_ENDIAN 1
-#endif
-
-/* PLATFORM(PPC64) */
-#if   defined(__ppc64__) \
-   || defined(__PPC64__)
-#define WTF_PLATFORM_PPC64 1
-#define WTF_PLATFORM_BIG_ENDIAN 1
-#endif
-
-/* PLATFORM(ARM) */
-#define PLATFORM_ARM_ARCH(N) (PLATFORM(ARM) && ARM_ARCH_VERSION >= N)
-
-#if   defined(arm) \
-   || defined(__arm__) \
-   || defined(__MARM__)
-#define WTF_PLATFORM_ARM 1
-#if defined(__ARMEB__)
-#define WTF_PLATFORM_BIG_ENDIAN 1
-#elif !defined(__ARM_EABI__) && !defined(__EABI__) && !defined(__VFP_FP__)
-#define WTF_PLATFORM_MIDDLE_ENDIAN 1
-#endif
-#define ARM_ARCH_VERSION 3
-#if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) || defined(ARMV4I) \
-    || defined(_ARMV4I_) || defined(armv4i)
-#undef ARM_ARCH_VERSION
-#define ARM_ARCH_VERSION 4
-#endif
-#if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \
-        || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \
-        || defined(__ARM_ARCH_5TEJ__) || defined(__MARM_ARMV5__)
-#undef ARM_ARCH_VERSION
-#define ARM_ARCH_VERSION 5
-#endif
-#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
-     || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \
-     || defined(__ARM_ARCH_6ZK__) || defined(__ARMV6__)
-#undef ARM_ARCH_VERSION
-#define ARM_ARCH_VERSION 6
-#endif
-#if defined(__ARM_ARCH_7A__) || defined(__ARMV7__)
-#undef ARM_ARCH_VERSION
-#define ARM_ARCH_VERSION 7
-#endif
-/* On ARMv5 and below the natural alignment is required. */
-#if !defined(ARM_REQUIRE_NATURAL_ALIGNMENT) && ARM_ARCH_VERSION <= 5
-#define ARM_REQUIRE_NATURAL_ALIGNMENT 1
-#endif
-/* Defines two pseudo-platforms for ARM and Thumb-2 instruction set. */
-#if !defined(WTF_PLATFORM_ARM_TRADITIONAL) && !defined(WTF_PLATFORM_ARM_THUMB2)
-#  if defined(thumb2) || defined(__thumb2__)
-#    define WTF_PLATFORM_ARM_TRADITIONAL 0
-#    define WTF_PLATFORM_ARM_THUMB2 1
-#  elif PLATFORM_ARM_ARCH(4) || PLATFORM_ARM_ARCH(5)
-#    define WTF_PLATFORM_ARM_TRADITIONAL 1
-#    define WTF_PLATFORM_ARM_THUMB2 0
-#  else
-#    error "Not supported ARM architecture"
-#  endif
-#elif PLATFORM(ARM_TRADITIONAL) && PLATFORM(ARM_THUMB2) /* Sanity Check */
-#  error "Cannot use both of WTF_PLATFORM_ARM_TRADITIONAL and WTF_PLATFORM_ARM_THUMB2 platforms"
-#endif // !defined(ARM_TRADITIONAL) && !defined(ARM_THUMB2)
-#endif /* ARM */
-
-/* PLATFORM(X86) */
-#if   defined(__i386__) \
-   || defined(i386)     \
-   || defined(_M_IX86)  \
-   || defined(_X86_)    \
-   || defined(__THW_INTEL)
-#define WTF_PLATFORM_X86 1
-#endif
-
-/* PLATFORM(X86_64) */
-#if   defined(__x86_64__) \
-   || defined(_M_X64)
-#define WTF_PLATFORM_X86_64 1
-#endif
-
-/* PLATFORM(SH4) */
-#if defined(__SH4__)
-#define WTF_PLATFORM_SH4 1
-#endif
-
-/* PLATFORM(SPARC64) */
-#if defined(__sparc__) && defined(__arch64__) || defined (__sparcv9)
-#define WTF_PLATFORM_SPARC64 1
-#define WTF_PLATFORM_BIG_ENDIAN 1
-#endif
-
-/* PLATFORM(SPARC32) */
-#if defined(__sparc) && !defined(__arch64__) || defined(__sparcv8)
-#define WTF_PLATFORM_SPARC32 1
-#define WTF_PLATFORM_BIG_ENDIAN 1
-#endif
-
-#if PLATFORM(SPARC32) || PLATFORM(SPARC64)
-#define WTF_PLATFORM_SPARC
-#endif
 
-/* PLATFORM(HPPA) */
-/* a.k.a. PA-RISC */
-#if defined(__hppa) || defined(__hppa__)
-#define WTF_PLATFORM_HPPA 1
-#define WTF_PLATFORM_BIG_ENDIAN 1
-#endif
-
-/* PLATFORM(IA64) */
-/* a.k.a. Itanium Processor Family, IPF */
-#if defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
-#define WTF_PLATFORM_IA64 1
-
-/* 32-bit mode on Itanium */
-#if !defined(__LP64__)
-#define WTF_PLATFORM_IA64_32 1
-#endif
-
-/* Itanium can be both big- and little-endian
-   we need to determine at compile time which one it is.
-    - HP's aCC compiler only compiles big-endian (so HP-UXi is always big-endian)
-    - GCC defines __BIG_ENDIAN__ for us (default on HP-UX)
-    - Linux is usually little-endian
-    - I've never seen AIX or Windows on IA-64, but they should be little-endian too
-*/
-#if defined(__BIG_ENDIAN__) || defined(__HP_aCC)
-# define WTF_PLATFORM_BIG_ENDIAN 1
-#endif
-#endif
-
-/* PLATFORM(WINCE) && PLATFORM(QT)
+/* OS(WINCE) && PLATFORM(QT)
    We can not determine the endianess at compile time. For
    Qt for Windows CE the endianess is specified in the
    device specific makespec
 */
-#if PLATFORM(WINCE) && PLATFORM(QT)
+#if OS(WINCE) && PLATFORM(QT)
 #   include <QtGlobal>
 #   undef WTF_PLATFORM_BIG_ENDIAN
 #   undef WTF_PLATFORM_MIDDLE_ENDIAN
 #   if Q_BYTE_ORDER == Q_BIG_EDIAN
 #       define WTF_PLATFORM_BIG_ENDIAN 1
 #   endif
-#endif
 
-#if PLATFORM(WINCE) && PLATFORM(QT)
 #   include <ce_time.h>
 #endif
 
-/* Compiler */
-
-/* COMPILER(MSVC) */
-#if defined(_MSC_VER)
-#define WTF_COMPILER_MSVC 1
-#if _MSC_VER < 1400
-#define WTF_COMPILER_MSVC7 1
-#endif
-#endif
-
-/* COMPILER(RVCT) */
-#if defined(__CC_ARM) || defined(__ARMCC__)
-#define WTF_COMPILER_RVCT 1
-#endif
-
-/* COMPILER(GCC) */
-/* --gnu option of the RVCT compiler also defines __GNUC__ */
-#if defined(__GNUC__) && !COMPILER(RVCT)
-#define WTF_COMPILER_GCC 1
-#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
-#endif
-
-/* COMPILER(MINGW) */
-#if defined(MINGW) || defined(__MINGW32__)
-#define WTF_COMPILER_MINGW 1
-#endif
-
-/* COMPILER(BORLAND) */
-/* not really fully supported - is this relevant any more? */
-#if defined(__BORLANDC__)
-#define WTF_COMPILER_BORLAND 1
-#endif
-
-/* COMPILER(CYGWIN) */
-/* not really fully supported - is this relevant any more? */
-#if defined(__CYGWIN__)
-#define WTF_COMPILER_CYGWIN 1
-#endif
-
-/* COMPILER(WINSCW) */
-#if defined(__WINSCW__)
-#define WTF_COMPILER_WINSCW 1
-#endif
-
-/* COMPILER(SUNCC) */
-/* This is the Sun CC compiler, also known as Sun Studio or Sun Pro */
-#if defined(__SUNPRO_CC) || defined(__SUNPRO_C)
-#define WTF_COMPILER_SUNCC 1
-#endif
-
-/* COMPILER(XLC) */
-/* IBM Visual Age C/C++ compiler, a.k.a. xlC */
-#if defined(__xlC__)
-#define WTF_COMPILER_XLC 1
-#endif
-
-/* COMPILER(ACC) */
-/* HP's aC++/ANSI C compiler, a.k.a. aCC */
-#if defined(__HP_aCC)
-#define WTF_COMPILER_ACC
-#endif
-
-#if (PLATFORM(IPHONE) || PLATFORM(MAC) || PLATFORM(WIN)) && !defined(ENABLE_JSC_MULTIPLE_THREADS)
+#if (PLATFORM(IPHONE) || PLATFORM(MAC) || PLATFORM(WIN) || (PLATFORM(QT) && OS(DARWIN) && !ENABLE(SINGLE_THREADED))) && !defined(ENABLE_JSC_MULTIPLE_THREADS)
 #define ENABLE_JSC_MULTIPLE_THREADS 1
 #endif
 
 /* On Windows, use QueryPerformanceCounter by default */
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 #define WTF_USE_QUERY_PERFORMANCE_COUNTER  1
 #endif
 
-#if PLATFORM(WINCE) && !PLATFORM(QT)
+#if OS(WINCE) && !PLATFORM(QT)
 #undef ENABLE_JSC_MULTIPLE_THREADS
 #define ENABLE_JSC_MULTIPLE_THREADS        0
 #define USE_SYSTEM_MALLOC                  0
@@ -467,26 +559,25 @@
 #define ENABLE_WML                         1
 #define HAVE_ACCESSIBILITY                 0
 
-#define NOMINMAX       // Windows min and max conflict with standard macros
-#define NOSHLWAPI      // shlwapi.h not available on WinCe
+#define NOMINMAX       /* Windows min and max conflict with standard macros */
+#define NOSHLWAPI      /* shlwapi.h not available on WinCe */
 
-// MSDN documentation says these functions are provided with uspce.lib.  But we cannot find this file.
-#define __usp10__      // disable "usp10.h"
+/* MSDN documentation says these functions are provided with uspce.lib.  But we cannot find this file. */
+#define __usp10__      /* disable "usp10.h" */
 
-#define _INC_ASSERT    // disable "assert.h"
+#define _INC_ASSERT    /* disable "assert.h" */
 #define assert(x)
 
-// _countof is only included in CE6; for CE5 we need to define it ourself
+/* _countof is only included in CE6; for CE5 we need to define it ourself */
 #ifndef _countof
 #define _countof(x) (sizeof(x) / sizeof((x)[0]))
 #endif
 
-#endif  /* PLATFORM(WINCE) && !PLATFORM(QT) */
+#endif  /* OS(WINCE) && !PLATFORM(QT) */
 
-/* for Unicode, KDE uses Qt */
-#if PLATFORM(KDE) || PLATFORM(QT)
+#if PLATFORM(QT)
 #define WTF_USE_QT4_UNICODE 1
-#elif PLATFORM(WINCE)
+#elif OS(WINCE)
 #define WTF_USE_WINCE_UNICODE 1
 #elif PLATFORM(GTK)
 /* The GTK+ Unicode backend is configurable */
@@ -497,6 +588,10 @@
 #if PLATFORM(MAC) && !PLATFORM(IPHONE)
 #define WTF_PLATFORM_CF 1
 #define WTF_USE_PTHREADS 1
+#define HAVE_PTHREAD_RWLOCK 1
+#if !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_TIGER) && CPU(X86_64)
+#define WTF_USE_PLUGIN_HOST_PROCESS 1
+#endif
 #if !defined(ENABLE_MAC_JAVA_BRIDGE)
 #define ENABLE_MAC_JAVA_BRIDGE 1
 #endif
@@ -505,26 +600,45 @@
 #endif
 #define HAVE_READLINE 1
 #define HAVE_RUNLOOP_TIMER 1
-#endif
+#endif /* PLATFORM(MAC) && !PLATFORM(IPHONE) */
 
-#if PLATFORM(CHROMIUM) && PLATFORM(DARWIN)
+#if PLATFORM(CHROMIUM) && OS(DARWIN)
 #define WTF_PLATFORM_CF 1
 #define WTF_USE_PTHREADS 1
+#define HAVE_PTHREAD_RWLOCK 1
 #endif
 
-#if PLATFORM(IPHONE)
+#if PLATFORM(QT) && OS(DARWIN)
 #define WTF_PLATFORM_CF 1
-#define WTF_USE_PTHREADS 1
+#endif
+
+#if PLATFORM(IPHONE)
 #define ENABLE_CONTEXT_MENUS 0
 #define ENABLE_DRAG_SUPPORT 0
 #define ENABLE_FTPDIR 1
+#define ENABLE_GEOLOCATION 1
+#define ENABLE_ICONDATABASE 0
 #define ENABLE_INSPECTOR 0
 #define ENABLE_MAC_JAVA_BRIDGE 0
-#define ENABLE_ICONDATABASE 0
-#define ENABLE_GEOLOCATION 1
 #define ENABLE_NETSCAPE_PLUGIN_API 0
-#define HAVE_READLINE 1
+#define ENABLE_ORIENTATION_EVENTS 1
 #define ENABLE_REPAINT_THROTTLING 1
+#define HAVE_READLINE 1
+#define WTF_PLATFORM_CF 1
+#define WTF_USE_PTHREADS 1
+#define HAVE_PTHREAD_RWLOCK 1
+#endif
+
+#if PLATFORM(ANDROID)
+#define WTF_USE_PTHREADS 1
+#define WTF_PLATFORM_SGL 1
+#define USE_SYSTEM_MALLOC 1
+#define ENABLE_MAC_JAVA_BRIDGE 1
+#define LOG_DISABLED 1
+/* Prevents Webkit from drawing the caret in textfields and textareas
+   This prevents unnecessary invals. */
+#define ENABLE_TEXT_CARET 1
+#define ENABLE_JAVASCRIPT_DEBUGGER 0
 #endif
 
 #if PLATFORM(WIN)
@@ -533,11 +647,15 @@
 
 #if PLATFORM(WX)
 #define ENABLE_ASSEMBLER 1
+#if OS(DARWIN)
+#define WTF_PLATFORM_CF 1
+#endif
 #endif
 
 #if PLATFORM(GTK)
 #if HAVE(PTHREAD_H)
 #define WTF_USE_PTHREADS 1
+#define HAVE_PTHREAD_RWLOCK 1
 #endif
 #endif
 
@@ -545,6 +663,7 @@
 #define HAVE_POSIX_MEMALIGN 1
 #define WTF_USE_CURL 1
 #define WTF_USE_PTHREADS 1
+#define HAVE_PTHREAD_RWLOCK 1
 #define USE_SYSTEM_MALLOC 1
 #define ENABLE_NETSCAPE_PLUGIN_API 0
 #endif
@@ -555,19 +674,19 @@
 #endif
 #endif /* !defined(HAVE_ACCESSIBILITY) */
 
-#if PLATFORM(UNIX) && !PLATFORM(SYMBIAN)
+#if OS(UNIX) && !OS(SYMBIAN)
 #define HAVE_SIGNAL_H 1
 #endif
 
-#if !PLATFORM(WIN_OS) && !PLATFORM(SOLARIS) && !PLATFORM(QNX) \
-    && !PLATFORM(SYMBIAN) && !PLATFORM(HAIKU) && !COMPILER(RVCT) && !PLATFORM(AIX) \
-    && !PLATFORM(HPUX)
+#if !OS(WINDOWS) && !OS(SOLARIS) && !OS(QNX) \
+    && !OS(SYMBIAN) && !OS(HAIKU) && !OS(RVCT) \
+    && !OS(ANDROID) && !OS(AIX) && !OS(HPUX)
 #define HAVE_TM_GMTOFF 1
 #define HAVE_TM_ZONE 1
 #define HAVE_TIMEGM 1
-#endif     
+#endif
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 
 #define HAVE_ERRNO_H 1
 #define HAVE_LANGINFO_H 1
@@ -579,27 +698,32 @@
 #define HAVE_SYS_TIME_H 1
 #define HAVE_SYS_TIMEB_H 1
 
-#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !PLATFORM(IPHONE) && !PLATFORM(QT)
+#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
+
+#define HAVE_DISPATCH_H 1
+
+#if !PLATFORM(IPHONE) && !PLATFORM(QT)
 #define HAVE_MADV_FREE_REUSE 1
 #define HAVE_MADV_FREE 1
 #define HAVE_PTHREAD_SETNAME_NP 1
 #endif
 
+#endif
+
 #if PLATFORM(IPHONE)
 #define HAVE_MADV_FREE 1
 #endif
 
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
 
-#define HAVE_FLOAT_H 1
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 #define HAVE_ERRNO_H 0
 #else
 #define HAVE_SYS_TIMEB_H 1
 #endif
 #define HAVE_VIRTUALALLOC 1
 
-#elif PLATFORM(SYMBIAN)
+#elif OS(SYMBIAN)
 
 #define HAVE_ERRNO_H 1
 #define HAVE_MMAP 0
@@ -612,9 +736,19 @@
 #define HAVE_SYS_PARAM_H 1
 #endif
 
-#elif PLATFORM(QNX)
+#elif OS(QNX)
+
+#define HAVE_ERRNO_H 1
+#define HAVE_MMAP 1
+#define HAVE_SBRK 1
+#define HAVE_STRINGS_H 1
+#define HAVE_SYS_PARAM_H 1
+#define HAVE_SYS_TIME_H 1
+
+#elif OS(ANDROID)
 
 #define HAVE_ERRNO_H 1
+#define HAVE_LANGINFO_H 0
 #define HAVE_MMAP 1
 #define HAVE_SBRK 1
 #define HAVE_STRINGS_H 1
@@ -627,7 +761,7 @@
 
 #define HAVE_ERRNO_H 1
 /* As long as Haiku doesn't have a complete support of locale this will be disabled. */
-#if !PLATFORM(HAIKU)
+#if !OS(HAIKU)
 #define HAVE_LANGINFO_H 1
 #endif
 #define HAVE_MMAP 1
@@ -686,6 +820,14 @@
 #define ENABLE_NETSCAPE_PLUGIN_API 1
 #endif
 
+#if !defined(WTF_USE_PLUGIN_HOST_PROCESS)
+#define WTF_USE_PLUGIN_HOST_PROCESS 0
+#endif
+
+#if !defined(ENABLE_ORIENTATION_EVENTS)
+#define ENABLE_ORIENTATION_EVENTS 0
+#endif
+
 #if !defined(ENABLE_OPCODE_STATS)
 #define ENABLE_OPCODE_STATS 0
 #endif
@@ -718,15 +860,11 @@
 #endif
 
 #if !defined(WTF_USE_JSVALUE64) && !defined(WTF_USE_JSVALUE32) && !defined(WTF_USE_JSVALUE32_64)
-#if PLATFORM(X86_64) && (PLATFORM(DARWIN) || PLATFORM(LINUX) || PLATFORM(SOLARIS) || PLATFORM(HPUX))
-#define WTF_USE_JSVALUE64 1
-#elif (PLATFORM(IA64) && !PLATFORM(IA64_32)) || PLATFORM(SPARC64)
-#define WTF_USE_JSVALUE64 1
-#elif PLATFORM(AIX64)
+#if (CPU(X86_64) && (OS(UNIX) || OS(WINDOWS) || OS(SOLARIS) || OS(HPUX))) || (CPU(IA64) && !CPU(IA64_32)) || CPU(ALPHA) || CPU(AIX64) || CPU(SPARC64)
 #define WTF_USE_JSVALUE64 1
-#elif PLATFORM(ARM) || PLATFORM(PPC64)
+#elif CPU(ARM) || CPU(PPC64)
 #define WTF_USE_JSVALUE32 1
-#elif PLATFORM(WIN_OS) && COMPILER(MINGW)
+#elif OS(WINDOWS) && COMPILER(MINGW)
 /* Using JSVALUE32_64 causes padding/alignement issues for JITStubArg
 on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
 #define WTF_USE_JSVALUE32 1
@@ -742,36 +880,38 @@ on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
 #if !defined(ENABLE_JIT)
 
 /* The JIT is tested & working on x86_64 Mac */
-#if PLATFORM(X86_64) && PLATFORM(MAC)
+#if CPU(X86_64) && PLATFORM(MAC)
     #define ENABLE_JIT 1
 /* The JIT is tested & working on x86 Mac */
-#elif PLATFORM(X86) && PLATFORM(MAC)
+#elif CPU(X86) && PLATFORM(MAC)
     #define ENABLE_JIT 1
     #define WTF_USE_JIT_STUB_ARGUMENT_VA_LIST 1
-#elif PLATFORM(ARM_THUMB2) && PLATFORM(IPHONE)
-    /* Under development, temporarily disabled until 16Mb link range limit in assembler is fixed. */
-    #define ENABLE_JIT 0
-    #define ENABLE_JIT_OPTIMIZE_NATIVE_CALL 0
+#elif CPU(ARM_THUMB2) && PLATFORM(IPHONE)
+    #define ENABLE_JIT 1
 /* The JIT is tested & working on x86 Windows */
-#elif PLATFORM(X86) && PLATFORM(WIN)
+#elif CPU(X86) && PLATFORM(WIN)
     #define ENABLE_JIT 1
 #endif
 
 #if PLATFORM(QT)
-#if PLATFORM(X86) && PLATFORM(WIN_OS) && COMPILER(MINGW) && GCC_VERSION >= 40100
+#if CPU(X86_64) && OS(DARWIN)
+    #define ENABLE_JIT 1
+#elif CPU(X86) && OS(DARWIN)
     #define ENABLE_JIT 1
     #define WTF_USE_JIT_STUB_ARGUMENT_VA_LIST 1
-#elif PLATFORM(X86) && PLATFORM(WIN_OS) && COMPILER(MSVC)
+#elif CPU(X86) && OS(WINDOWS) && COMPILER(MINGW) && GCC_VERSION >= 40100
+    #define ENABLE_JIT 1
+    #define WTF_USE_JIT_STUB_ARGUMENT_VA_LIST 1
+#elif CPU(X86) && OS(WINDOWS) && COMPILER(MSVC)
     #define ENABLE_JIT 1
     #define WTF_USE_JIT_STUB_ARGUMENT_REGISTER 1
-#elif PLATFORM(X86) && PLATFORM(LINUX) && GCC_VERSION >= 40100
+#elif CPU(X86) && OS(LINUX) && GCC_VERSION >= 40100
     #define ENABLE_JIT 1
     #define WTF_USE_JIT_STUB_ARGUMENT_VA_LIST 1
-#elif PLATFORM(ARM_TRADITIONAL) && PLATFORM(LINUX)
+#elif CPU(X86_64) && OS(LINUX) && GCC_VERSION >= 40100
+    #define ENABLE_JIT 1
+#elif CPU(ARM_TRADITIONAL) && OS(LINUX)
     #define ENABLE_JIT 1
-    #if PLATFORM(ARM_THUMB2)
-        #define ENABLE_JIT_OPTIMIZE_NATIVE_CALL 0
-    #endif
 #endif
 #endif /* PLATFORM(QT) */
 
@@ -792,9 +932,9 @@ on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
 #endif
 #endif
 
-#if PLATFORM(X86) && COMPILER(MSVC)
+#if CPU(X86) && COMPILER(MSVC)
 #define JSC_HOST_CALL __fastcall
-#elif PLATFORM(X86) && COMPILER(GCC)
+#elif CPU(X86) && COMPILER(GCC)
 #define JSC_HOST_CALL __attribute__ ((fastcall))
 #else
 #define JSC_HOST_CALL
@@ -814,20 +954,20 @@ on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
 #if !defined(ENABLE_YARR_JIT)
 
 /* YARR supports x86 & x86-64, and has been tested on Mac and Windows. */
-#if (PLATFORM(X86) && PLATFORM(MAC)) \
- || (PLATFORM(X86_64) && PLATFORM(MAC)) \
- /* Under development, temporarily disabled until 16Mb link range limit in assembler is fixed. */ \
- || (PLATFORM(ARM_THUMB2) && PLATFORM(IPHONE) && 0) \
- || (PLATFORM(X86) && PLATFORM(WIN))
+#if (CPU(X86) && PLATFORM(MAC)) \
+    || (CPU(X86_64) && PLATFORM(MAC)) \
+    || (CPU(ARM_THUMB2) && PLATFORM(IPHONE)) \
+    || (CPU(X86) && PLATFORM(WIN))
 #define ENABLE_YARR 1
 #define ENABLE_YARR_JIT 1
 #endif
 
 #if PLATFORM(QT)
-#if (PLATFORM(X86) && PLATFORM(WIN_OS) && COMPILER(MINGW) && GCC_VERSION >= 40100) \
- || (PLATFORM(X86) && PLATFORM(WIN_OS) && COMPILER(MSVC)) \
- || (PLATFORM(X86) && PLATFORM(LINUX) && GCC_VERSION >= 40100) \
- || (PLATFORM(ARM_TRADITIONAL) && PLATFORM(LINUX))
+#if (CPU(X86) && OS(WINDOWS) && COMPILER(MINGW) && GCC_VERSION >= 40100) \
+    || (CPU(X86) && OS(WINDOWS) && COMPILER(MSVC)) \
+    || (CPU(X86) && OS(LINUX) && GCC_VERSION >= 40100) \
+    || (CPU(X86_64) && OS(LINUX) && GCC_VERSION >= 40100) \
+    || (CPU(ARM_TRADITIONAL) && OS(LINUX))
 #define ENABLE_YARR 1
 #define ENABLE_YARR_JIT 1
 #endif
@@ -851,15 +991,15 @@ on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
 #define ENABLE_ASSEMBLER_WX_EXCLUSIVE 0
 #endif
 
-#if !defined(ENABLE_PAN_SCROLLING) && PLATFORM(WIN_OS)
+#if !defined(ENABLE_PAN_SCROLLING) && OS(WINDOWS)
 #define ENABLE_PAN_SCROLLING 1
 #endif
 
-/* Use the QtXmlStreamReader implementation for XMLTokenizer */
+/* Use the QXmlStreamReader implementation for XMLTokenizer */
+/* Use the QXmlQuery implementation for XSLTProcessor */
 #if PLATFORM(QT)
-#if !ENABLE(XSLT)
 #define WTF_USE_QXMLSTREAM 1
-#endif
+#define WTF_USE_QXMLQUERY 1
 #endif
 
 #if !PLATFORM(QT)
@@ -877,13 +1017,30 @@ on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
 #define WTF_USE_ACCELERATED_COMPOSITING 1
 #endif
 
+/* FIXME: Defining ENABLE_3D_RENDERING here isn't really right, but it's always used with
+   with WTF_USE_ACCELERATED_COMPOSITING, and it allows the feature to be turned on and
+   off in one place. */
+#if PLATFORM(WIN)
+#include "QuartzCorePresent.h"
+#if QUARTZCORE_PRESENT
+#define WTF_USE_ACCELERATED_COMPOSITING 1
+#define ENABLE_3D_RENDERING 1
+#endif
+#endif
+
 #if COMPILER(GCC)
 #define WARN_UNUSED_RETURN __attribute__ ((warn_unused_result))
 #else
 #define WARN_UNUSED_RETURN
 #endif
 
+#if !ENABLE(NETSCAPE_PLUGIN_API) || (ENABLE(NETSCAPE_PLUGIN_API) && ((OS(UNIX) && (PLATFORM(QT) || PLATFORM(WX))) || PLATFORM(GTK)))
+#define ENABLE_PLUGIN_PACKAGE_SIMPLE_HASH 1
+#endif
+
 /* Set up a define for a common error that is intended to cause a build error -- thus the space after Error. */
 #define WTF_PLATFORM_CFNETWORK Error USE_macro_should_be_used_with_CFNETWORK
 
+#define ENABLE_JSC_ZOMBIES 0
+
 #endif /* WTF_Platform_h */
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PtrAndFlags.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PtrAndFlags.h
index 5d0bd2a..1e1bee0 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PtrAndFlags.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/PtrAndFlags.h
@@ -68,7 +68,7 @@ namespace WTF {
         PtrAndFlags(T* ptr)
         {
             PtrAndFlagsBase<T, FlagEnum>::m_ptrAndFlags = 0;
-            set(ptr);
+            PtrAndFlagsBase<T, FlagEnum>::set(ptr);
         }
     };
 } // namespace WTF
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumber.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumber.cpp
index 52fb130..74bb45c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumber.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumber.cpp
@@ -34,7 +34,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 extern "C" {
 #include "wince/mt19937ar.c"
 }
@@ -66,10 +66,10 @@ double randomNumber()
     uint32_t bits;
     rand_s(&bits);
     return static_cast<double>(bits) / (static_cast<double>(std::numeric_limits<uint32_t>::max()) + 1.0);
-#elif PLATFORM(DARWIN)
+#elif OS(DARWIN)
     uint32_t bits = arc4random();
     return static_cast<double>(bits) / (static_cast<double>(std::numeric_limits<uint32_t>::max()) + 1.0);
-#elif PLATFORM(UNIX)
+#elif OS(UNIX)
     uint32_t part1 = random() & (RAND_MAX - 1);
     uint32_t part2 = random() & (RAND_MAX - 1);
     // random only provides 31 bits
@@ -80,9 +80,9 @@ double randomNumber()
     // Mask off the low 53bits
     fullRandom &= (1LL << 53) - 1;
     return static_cast<double>(fullRandom)/static_cast<double>(1LL << 53);
-#elif PLATFORM(WINCE)
+#elif OS(WINCE)
     return genrand_res53();
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
     uint32_t part1 = rand() & (RAND_MAX - 1);
     uint32_t part2 = rand() & (RAND_MAX - 1);
     uint32_t part3 = rand() & (RAND_MAX - 1);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumberSeed.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumberSeed.h
index a66433e..ae414c0 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumberSeed.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RandomNumberSeed.h
@@ -33,12 +33,12 @@
 #include <sys/time.h>
 #endif
 
-#if PLATFORM(UNIX)
+#if OS(UNIX)
 #include <sys/types.h>
 #include <unistd.h>
 #endif
 
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 extern "C" {
 void init_by_array(unsigned long init_key[],int key_length);
 }
@@ -49,9 +49,9 @@ namespace WTF {
 
 inline void initializeRandomNumberGenerator()
 {
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
     // On Darwin we use arc4random which initialises itself.
-#elif PLATFORM(WINCE)
+#elif OS(WINCE)
     // initialize rand()
     srand(static_cast<unsigned>(time(0)));
 
@@ -64,7 +64,7 @@ inline void initializeRandomNumberGenerator()
     init_by_array(initializationBuffer, 4);
 #elif COMPILER(MSVC) && defined(_CRT_RAND_S)
     // On Windows we use rand_s which initialises itself
-#elif PLATFORM(UNIX)
+#elif OS(UNIX)
     // srandomdev is not guaranteed to exist on linux so we use this poor seed, this should be improved
     timeval time;
     gettimeofday(&time, 0);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RefPtr.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RefPtr.h
index 1a0b1fe..83c54bc 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RefPtr.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/RefPtr.h
@@ -24,22 +24,27 @@
 #include <algorithm>
 #include "AlwaysInline.h"
 #include "FastAllocBase.h"
+#if COMPILER(WINSCW)
+#include "PassRefPtr.h"
+#endif
 
 namespace WTF {
 
     enum PlacementNewAdoptType { PlacementNewAdopt };
 
     template <typename T> class PassRefPtr;
+    template <typename T> class NonNullPassRefPtr;
 
     enum HashTableDeletedValueType { HashTableDeletedValue };
 
     template <typename T> class RefPtr : public FastAllocBase {
     public:
         RefPtr() : m_ptr(0) { }
-        RefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
-        RefPtr(const RefPtr& o) : m_ptr(o.m_ptr) { T* ptr = m_ptr; refIfNotNull(ptr); }
+        RefPtr(T* ptr) : m_ptr(ptr) { if (ptr) ptr->ref(); }
+        RefPtr(const RefPtr& o) : m_ptr(o.m_ptr) { if (T* ptr = m_ptr) ptr->ref(); }
         // see comment in PassRefPtr.h for why this takes const reference
         template <typename U> RefPtr(const PassRefPtr<U>&);
+        template <typename U> RefPtr(const NonNullPassRefPtr<U>&);
 
         // Special constructor for cases where we overwrite an object in place.
         RefPtr(PlacementNewAdoptType) { }
@@ -48,13 +53,21 @@ namespace WTF {
         RefPtr(HashTableDeletedValueType) : m_ptr(hashTableDeletedValue()) { }
         bool isHashTableDeletedValue() const { return m_ptr == hashTableDeletedValue(); }
 
-        ~RefPtr() { T* ptr = m_ptr; derefIfNotNull(ptr); }
+#if COMPILER(WINSCW)
+        ~RefPtr() { if (T* ptr = m_ptr) derefIfNotNull<T>(ptr); }
+#else
+        ~RefPtr() { if (T* ptr = m_ptr) ptr->deref(); }
+#endif
         
-        template <typename U> RefPtr(const RefPtr<U>& o) : m_ptr(static_cast<T*>(o.get())) { if (T* ptr = static_cast<T*>(m_ptr)) ptr->ref(); }
+        template <typename U> RefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { if (T* ptr = m_ptr) ptr->ref(); }
         
         T* get() const { return m_ptr; }
         
-        void clear() { T* ptr = m_ptr; derefIfNotNull(ptr); m_ptr = 0; }
+#if COMPILER(WINSCW)
+        void clear() { if (T* ptr = m_ptr) derefIfNotNull<T>(ptr); m_ptr = 0; }
+#else
+        void clear() { if (T* ptr = m_ptr) ptr->deref(); m_ptr = 0; }
+#endif
         PassRefPtr<T> release() { PassRefPtr<T> tmp = adoptRef(m_ptr); m_ptr = 0; return tmp; }
 
         T& operator*() const { return *m_ptr; }
@@ -73,8 +86,10 @@ namespace WTF {
         RefPtr& operator=(const RefPtr&);
         RefPtr& operator=(T*);
         RefPtr& operator=(const PassRefPtr<T>&);
+        RefPtr& operator=(const NonNullPassRefPtr<T>&);
         template <typename U> RefPtr& operator=(const RefPtr<U>&);
         template <typename U> RefPtr& operator=(const PassRefPtr<U>&);
+        template <typename U> RefPtr& operator=(const NonNullPassRefPtr<U>&);
 
         void swap(RefPtr&);
 
@@ -89,32 +104,43 @@ namespace WTF {
     {
     }
 
+    template <typename T> template <typename U> inline RefPtr<T>::RefPtr(const NonNullPassRefPtr<U>& o)
+        : m_ptr(o.releaseRef())
+    {
+    }
+
     template <typename T> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<T>& o)
     {
         T* optr = o.get();
-        refIfNotNull(optr);
+        if (optr)
+            optr->ref();
         T* ptr = m_ptr;
         m_ptr = optr;
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
         return *this;
     }
     
     template <typename T> template <typename U> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<U>& o)
     {
         T* optr = o.get();
-        refIfNotNull(optr);
+        if (optr)
+            optr->ref();
         T* ptr = m_ptr;
         m_ptr = optr;
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
         return *this;
     }
     
     template <typename T> inline RefPtr<T>& RefPtr<T>::operator=(T* optr)
     {
-        refIfNotNull(optr);
+        if (optr)
+            optr->ref();
         T* ptr = m_ptr;
         m_ptr = optr;
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
         return *this;
     }
 
@@ -122,7 +148,17 @@ namespace WTF {
     {
         T* ptr = m_ptr;
         m_ptr = o.releaseRef();
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
+        return *this;
+    }
+
+    template <typename T> inline RefPtr<T>& RefPtr<T>::operator=(const NonNullPassRefPtr<T>& o)
+    {
+        T* ptr = m_ptr;
+        m_ptr = o.releaseRef();
+        if (ptr)
+            ptr->deref();
         return *this;
     }
 
@@ -130,7 +166,17 @@ namespace WTF {
     {
         T* ptr = m_ptr;
         m_ptr = o.releaseRef();
-        derefIfNotNull(ptr);
+        if (ptr)
+            ptr->deref();
+        return *this;
+    }
+
+    template <typename T> template <typename U> inline RefPtr<T>& RefPtr<T>::operator=(const NonNullPassRefPtr<U>& o)
+    {
+        T* ptr = m_ptr;
+        m_ptr = o.releaseRef();
+        if (ptr)
+            ptr->deref();
         return *this;
     }
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h
index d21d1ff..9dfb969 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h
@@ -32,6 +32,7 @@
 // Use these to declare and define a static local variable (static T;) so that
 //  it is leaked so that its destructors are not called at exit. Using this
 //  macro also allows workarounds a compiler bug present in Apple's version of GCC 4.0.1.
+#ifndef DEFINE_STATIC_LOCAL
 #if COMPILER(GCC) && defined(__APPLE_CC__) && __GNUC__ == 4 && __GNUC_MINOR__ == 0 && __GNUC_PATCHLEVEL__ == 1
 #define DEFINE_STATIC_LOCAL(type, name, arguments) \
     static type* name##Ptr = new type arguments; \
@@ -40,12 +41,17 @@
 #define DEFINE_STATIC_LOCAL(type, name, arguments) \
     static type& name = *new type arguments
 #endif
+#endif
 
 // OBJECT_OFFSETOF: Like the C++ offsetof macro, but you can use it with classes.
 // The magic number 0x4000 is insignificant. We use it to avoid using NULL, since
 // NULL can cause compiler problems, especially in cases of multiple inheritance.
 #define OBJECT_OFFSETOF(class, field) (reinterpret_cast<ptrdiff_t>(&(reinterpret_cast<class*>(0x4000)->field)) - 0x4000)
 
+// STRINGIZE: Can convert any value to quoted string, even expandable macros
+#define STRINGIZE(exp) #exp
+#define STRINGIZE_VALUE_OF(exp) STRINGIZE(exp)
+
 namespace WTF {
 
     /*
@@ -63,6 +69,14 @@ namespace WTF {
         return u.to;
     }
 
+    // Returns a count of the number of bits set in 'bits'.
+    inline size_t bitCount(unsigned bits)
+    {
+        bits = bits - ((bits >> 1) & 0x55555555);
+        bits = (bits & 0x33333333) + ((bits >> 2) & 0x33333333);
+        return (((bits + (bits >> 4)) & 0xF0F0F0F) * 0x1010101) >> 24;
+    }
+
 } // namespace WTF
 
 #endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringExtras.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringExtras.cpp
new file mode 100644
index 0000000..1b96417
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringExtras.cpp
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2009 Company 100, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+
+#if COMPILER(RVCT) && __ARMCC_VERSION < 400000
+
+#include "StringExtras.h"
+
+#include "ASCIICType.h"
+
+int strcasecmp(const char* s1, const char* s2)
+{
+    while (toASCIIUpper(*s1) == toASCIIUpper(*s2)) {
+        if (*s1 == '\0')
+            return 0;
+        s1++;
+        s2++;
+    }
+
+    return toASCIIUpper(*s1) - toASCIIUpper(*s2);
+}
+
+int strncasecmp(const char* s1, const char* s2, size_t len)
+{
+    while (len > 0 && toASCIIUpper(*s1) == toASCIIUpper(*s2)) {
+        if (*s1 == '\0')
+            return 0;
+        s1++;
+        s2++;
+        len--;
+    }
+
+    if (!len)
+        return 0;
+
+    return toASCIIUpper(*s1) - toASCIIUpper(*s2);
+}
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringExtras.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringExtras.h
index 559e3f2..b1ec09f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringExtras.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringExtras.h
@@ -34,6 +34,7 @@
 #endif 
 
 #if COMPILER(MSVC)
+// FIXME: why a COMPILER check instead of OS? also, these should be HAVE checks
 
 inline int snprintf(char* buffer, size_t count, const char* format, ...) 
 {
@@ -45,7 +46,7 @@ inline int snprintf(char* buffer, size_t count, const char* format, ...)
     return result;
 }
 
-#if COMPILER(MSVC7) || PLATFORM(WINCE)
+#if COMPILER(MSVC7) || OS(WINCE)
 
 inline int vsnprintf(char* buffer, size_t count, const char* format, va_list args)
 {
@@ -54,7 +55,7 @@ inline int vsnprintf(char* buffer, size_t count, const char* format, va_list arg
 
 #endif
 
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 
 inline int strnicmp(const char* string1, const char* string2, size_t count)
 {
@@ -75,17 +76,18 @@ inline char* strdup(const char* strSource)
 
 inline int strncasecmp(const char* s1, const char* s2, size_t len)
 {
-    return strnicmp(s1, s2, len);
+    return _strnicmp(s1, s2, len);
 }
 
 inline int strcasecmp(const char* s1, const char* s2)
 {
-    return stricmp(s1, s2);
+    return _stricmp(s1, s2);
 }
 
 #endif
 
-#if PLATFORM(WIN_OS) || PLATFORM(LINUX)
+#if OS(WINDOWS) || OS(LINUX) || OS(SOLARIS)
+// FIXME: should check HAVE_STRNSTR
 
 inline char* strnstr(const char* buffer, const char* target, size_t bufferLength)
 {
@@ -101,4 +103,11 @@ inline char* strnstr(const char* buffer, const char* target, size_t bufferLength
 
 #endif
 
+#if COMPILER(RVCT) && __ARMCC_VERSION < 400000
+
+int strcasecmp(const char* s1, const char* s2);
+int strncasecmp(const char* s1, const char* s2, size_t len);
+
+#endif
+
 #endif // WTF_StringExtras_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringHashFunctions.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringHashFunctions.h
new file mode 100644
index 0000000..07f117f
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StringHashFunctions.h
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2005, 2006, 2008, 2010 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+#ifndef WTF_StringHashFunctions_h
+#define WTF_StringHashFunctions_h
+
+#include <wtf/unicode/Unicode.h>
+
+namespace WTF {
+
+// Golden ratio - arbitrary start value to avoid mapping all 0's to all 0's
+static const unsigned stringHashingStartValue = 0x9e3779b9U;
+
+// stringHash methods based on Paul Hsieh's SuperFastHash.
+// http://www.azillionmonkeys.com/qed/hash.html
+// char* data is interpreted as latin-encoded (zero extended to 16 bits).
+
+inline unsigned stringHash(const UChar* data, unsigned length)
+{
+    unsigned hash = WTF::stringHashingStartValue;
+    unsigned rem = length & 1;
+    length >>= 1;
+
+    // Main loop
+    for (; length > 0; length--) {
+        hash += data[0];
+        unsigned tmp = (data[1] << 11) ^ hash;
+        hash = (hash << 16) ^ tmp;
+        data += 2;
+        hash += hash >> 11;
+    }
+
+    // Handle end case
+    if (rem) {
+        hash += data[0];
+        hash ^= hash << 11;
+        hash += hash >> 17;
+    }
+
+    // Force "avalanching" of final 127 bits
+    hash ^= hash << 3;
+    hash += hash >> 5;
+    hash ^= hash << 2;
+    hash += hash >> 15;
+    hash ^= hash << 10;
+
+    hash &= 0x7fffffff;
+
+    // this avoids ever returning a hash code of 0, since that is used to
+    // signal "hash not computed yet", using a value that is likely to be
+    // effectively the same as 0 when the low bits are masked
+    if (hash == 0)
+        hash = 0x40000000;
+
+    return hash;
+}
+
+inline unsigned stringHash(const char* data, unsigned length)
+{
+    unsigned hash = WTF::stringHashingStartValue;
+    unsigned rem = length & 1;
+    length >>= 1;
+
+    // Main loop
+    for (; length > 0; length--) {
+        hash += static_cast<unsigned char>(data[0]);
+        unsigned tmp = (static_cast<unsigned char>(data[1]) << 11) ^ hash;
+        hash = (hash << 16) ^ tmp;
+        data += 2;
+        hash += hash >> 11;
+    }
+
+    // Handle end case
+    if (rem) {
+        hash += static_cast<unsigned char>(data[0]);
+        hash ^= hash << 11;
+        hash += hash >> 17;
+    }
+
+    // Force "avalanching" of final 127 bits
+    hash ^= hash << 3;
+    hash += hash >> 5;
+    hash ^= hash << 2;
+    hash += hash >> 15;
+    hash ^= hash << 10;
+
+    hash &= 0x7fffffff;
+
+    // this avoids ever returning a hash code of 0, since that is used to
+    // signal "hash not computed yet", using a value that is likely to be
+    // effectively the same as 0 when the low bits are masked
+    if (hash == 0)
+        hash = 0x40000000;
+
+    return hash;
+}
+
+inline unsigned stringHash(const char* data)
+{
+    unsigned hash = WTF::stringHashingStartValue;
+
+    // Main loop
+    for (;;) {
+        unsigned char b0 = data[0];
+        if (!b0)
+            break;
+        unsigned char b1 = data[1];
+        if (!b1) {
+            hash += b0;
+            hash ^= hash << 11;
+            hash += hash >> 17;
+            break;
+        }
+        hash += b0;
+        unsigned tmp = (b1 << 11) ^ hash;
+        hash = (hash << 16) ^ tmp;
+        data += 2;
+        hash += hash >> 11;
+    }
+
+    // Force "avalanching" of final 127 bits.
+    hash ^= hash << 3;
+    hash += hash >> 5;
+    hash ^= hash << 2;
+    hash += hash >> 15;
+    hash ^= hash << 10;
+
+    hash &= 0x7fffffff;
+
+    // This avoids ever returning a hash code of 0, since that is used to
+    // signal "hash not computed yet", using a value that is likely to be
+    // effectively the same as 0 when the low bits are masked.
+    if (hash == 0)
+        hash = 0x40000000;
+
+    return hash;
+}
+
+} // namespace WTF
+
+#endif // WTF_StringHashFunctions_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSpinLock.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSpinLock.h
index 4cf30c2..8a73e13 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSpinLock.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSpinLock.h
@@ -33,7 +33,7 @@
 #ifndef TCMALLOC_INTERNAL_SPINLOCK_H__
 #define TCMALLOC_INTERNAL_SPINLOCK_H__
 
-#if (PLATFORM(X86) || PLATFORM(PPC)) && (COMPILER(GCC) || COMPILER(MSVC))
+#if (CPU(X86) || CPU(X86_64) || CPU(PPC)) && (COMPILER(GCC) || COMPILER(MSVC))
 
 #include <time.h>       /* For nanosleep() */
 
@@ -47,7 +47,7 @@
 #include <sys/types.h>
 #endif
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
@@ -62,7 +62,7 @@ struct TCMalloc_SpinLock {
   inline void Lock() {
     int r;
 #if COMPILER(GCC)
-#if PLATFORM(X86)
+#if CPU(X86) || CPU(X86_64)
     __asm__ __volatile__
       ("xchgl %0, %1"
        : "=r"(r), "=m"(lockword_)
@@ -92,7 +92,7 @@ struct TCMalloc_SpinLock {
 
   inline void Unlock() {
 #if COMPILER(GCC)
-#if PLATFORM(X86)
+#if CPU(X86) || CPU(X86_64)
     __asm__ __volatile__
       ("movl $0, %0"
        : "=m"(lockword_)
@@ -103,7 +103,7 @@ struct TCMalloc_SpinLock {
       ("isync\n\t"
        "eieio\n\t"
        "stw %1, %0"
-#if PLATFORM(DARWIN) || PLATFORM(PPC)
+#if OS(DARWIN) || CPU(PPC)
        : "=o" (lockword_)
 #else
        : "=m" (lockword_) 
@@ -138,7 +138,7 @@ static void TCMalloc_SlowLock(volatile unsigned int* lockword) {
   while (true) {
     int r;
 #if COMPILER(GCC)
-#if PLATFORM(X86)
+#if CPU(X86) || CPU(X86_64)
     __asm__ __volatile__
       ("xchgl %0, %1"
        : "=r"(r), "=m"(*lockword)
@@ -178,7 +178,7 @@ static void TCMalloc_SlowLock(volatile unsigned int* lockword) {
     // from taking 30 seconds to 16 seconds.
 
     // Sleep for a few milliseconds
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
     Sleep(2);
 #else
     struct timespec tm;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSystemAlloc.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSystemAlloc.cpp
index a43baa8..909f14e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSystemAlloc.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TCSystemAlloc.cpp
@@ -47,7 +47,7 @@
 #include <sys/types.h>
 #endif
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 #include "windows.h"
 #else
 #include <errno.h>
@@ -324,10 +324,10 @@ static void* TryDevMem(size_t size, size_t *actual_size, size_t alignment) {
   
   // Return the unused virtual memory to the system
   if (adjust > 0) {
-    munmap(reinterpret_cast<char*>(ptr), adjust);
+    munmap(reinterpret_cast<void*>(ptr), adjust);
   }
   if (adjust < extra) {
-    munmap(reinterpret_cast<char*>(ptr + adjust + size), extra - adjust);
+    munmap(reinterpret_cast<void*>(ptr + adjust + size), extra - adjust);
   }
   
   ptr += adjust;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.cpp
new file mode 100644
index 0000000..042d49e
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if USE(PTHREADS)
+
+#include "ThreadIdentifierDataPthreads.h"
+
+#include "Threading.h"
+
+namespace WTF {
+
+pthread_key_t ThreadIdentifierData::m_key;
+
+void clearPthreadHandleForIdentifier(ThreadIdentifier);
+
+ThreadIdentifierData::~ThreadIdentifierData()
+{
+    clearPthreadHandleForIdentifier(m_identifier);
+}
+
+ThreadIdentifier ThreadIdentifierData::identifier()
+{
+    initializeKeyOnce();
+    ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(pthread_getspecific(m_key));
+
+    return threadIdentifierData ? threadIdentifierData->m_identifier : 0;
+}
+
+void ThreadIdentifierData::initialize(ThreadIdentifier id)
+{
+    ASSERT(!identifier());
+
+    initializeKeyOnce();
+    pthread_setspecific(m_key, new ThreadIdentifierData(id));
+}
+
+void ThreadIdentifierData::destruct(void* data)
+{
+    ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(data);
+    ASSERT(threadIdentifierData);
+
+    if (threadIdentifierData->m_isDestroyedOnce) {
+        delete threadIdentifierData;
+        return;
+    }
+
+    threadIdentifierData->m_isDestroyedOnce = true;
+    // Re-setting the value for key causes another destruct() call after all other thread-specific destructors were called.
+    pthread_setspecific(m_key, threadIdentifierData);
+}
+
+void ThreadIdentifierData::initializeKeyOnceHelper()
+{
+    if (pthread_key_create(&m_key, destruct))
+        CRASH();
+}
+
+void ThreadIdentifierData::initializeKeyOnce()
+{
+    static pthread_once_t onceControl = PTHREAD_ONCE_INIT;
+    if (pthread_once(&onceControl, initializeKeyOnceHelper))
+        CRASH();
+}
+
+} // namespace WTF
+
+#endif // USE(PTHREADS)
+
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h
new file mode 100644
index 0000000..3af87a8
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ThreadIdentifierDataPthreads_h
+#define ThreadIdentifierDataPthreads_h
+
+#include <wtf/Noncopyable.h>
+#include <wtf/Threading.h>
+
+namespace WTF {
+
+// Holds ThreadIdentifier in the thread-specific storage and employs pthreads-specific 2-pass destruction to reliably remove
+// ThreadIdentifier from threadMap. It assumes regular ThreadSpecific types don't use multiple-pass destruction.
+class ThreadIdentifierData : public Noncopyable {
+public:
+    ~ThreadIdentifierData();
+
+    // Creates and puts an instance of ThreadIdentifierData into thread-specific storage.
+    static void initialize(ThreadIdentifier identifier);
+
+    // Returns 0 if thread-specific storage was not initialized.
+    static ThreadIdentifier identifier();
+
+private:
+    ThreadIdentifierData(ThreadIdentifier identifier)
+        : m_identifier(identifier)
+        , m_isDestroyedOnce(false)
+    {
+    }
+
+    // This thread-specific destructor is called 2 times when thread terminates:
+    // - first, when all the other thread-specific destructors are called, it simply remembers it was 'destroyed once'
+    // and re-sets itself into the thread-specific slot to make Pthreads to call it again later.
+    // - second, after all thread-specific destructors were invoked, it gets called again - this time, we remove the
+    // ThreadIdentifier from the threadMap, completing the cleanup.
+    static void destruct(void* data);
+
+    static void initializeKeyOnceHelper();
+    static void initializeKeyOnce();
+
+    ThreadIdentifier m_identifier;
+    bool m_isDestroyedOnce;
+    static pthread_key_t m_key;
+};
+
+} // namespace WTF
+
+#endif // ThreadIdentifierDataPthreads_h
+
+
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadSpecific.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadSpecific.h
index b6f5fd3..3abbc58 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadSpecific.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadSpecific.h
@@ -47,13 +47,13 @@
 #include <pthread.h>
 #elif PLATFORM(QT)
 #include <QThreadStorage>
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
 #include <windows.h>
 #endif
 
 namespace WTF {
 
-#if !USE(PTHREADS) && !PLATFORM(QT) && PLATFORM(WIN_OS)
+#if !USE(PTHREADS) && !PLATFORM(QT) && OS(WINDOWS)
 // ThreadSpecificThreadExit should be called each time when a thread is detached.
 // This is done automatically for threads created with WTF::createThread.
 void ThreadSpecificThreadExit();
@@ -68,7 +68,7 @@ public:
     ~ThreadSpecific();
 
 private:
-#if !USE(PTHREADS) && !PLATFORM(QT) && PLATFORM(WIN_OS)
+#if !USE(PTHREADS) && !PLATFORM(QT) && OS(WINDOWS)
     friend void ThreadSpecificThreadExit();
 #endif
     
@@ -76,7 +76,7 @@ private:
     void set(T*);
     void static destroy(void* ptr);
 
-#if USE(PTHREADS) || PLATFORM(QT) || PLATFORM(WIN_OS)
+#if USE(PTHREADS) || PLATFORM(QT) || OS(WINDOWS)
     struct Data : Noncopyable {
         Data(T* value, ThreadSpecific<T>* owner) : value(value), owner(owner) {}
 #if PLATFORM(QT)
@@ -91,15 +91,44 @@ private:
     };
 #endif
 
+#if ENABLE(SINGLE_THREADED)
+    T* m_value;
+#else
 #if USE(PTHREADS)
     pthread_key_t m_key;
 #elif PLATFORM(QT)
     QThreadStorage<Data*> m_key;
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
     int m_index;
 #endif
+#endif
 };
 
+#if ENABLE(SINGLE_THREADED)
+template<typename T>
+inline ThreadSpecific<T>::ThreadSpecific()
+    : m_value(0)
+{
+}
+
+template<typename T>
+inline ThreadSpecific<T>::~ThreadSpecific()
+{
+}
+
+template<typename T>
+inline T* ThreadSpecific<T>::get()
+{
+    return m_value;
+}
+
+template<typename T>
+inline void ThreadSpecific<T>::set(T* ptr)
+{
+    ASSERT(!get());
+    m_value = ptr;
+}
+#else
 #if USE(PTHREADS)
 template<typename T>
 inline ThreadSpecific<T>::ThreadSpecific()
@@ -157,7 +186,7 @@ inline void ThreadSpecific<T>::set(T* ptr)
     m_key.setLocalData(data);
 }
 
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
 
 // The maximum number of TLS keys that can be created. For simplification, we assume that:
 // 1) Once the instance of ThreadSpecific<> is created, it will not be destructed until the program dies.
@@ -207,10 +236,12 @@ inline void ThreadSpecific<T>::set(T* ptr)
 #else
 #error ThreadSpecific is not implemented for this platform.
 #endif
+#endif
 
 template<typename T>
 inline void ThreadSpecific<T>::destroy(void* ptr)
 {
+#if !ENABLE(SINGLE_THREADED)
     Data* data = static_cast<Data*>(ptr);
 
 #if USE(PTHREADS)
@@ -230,7 +261,7 @@ inline void ThreadSpecific<T>::destroy(void* ptr)
     pthread_setspecific(data->owner->m_key, 0);
 #elif PLATFORM(QT)
     // Do nothing here
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
     TlsSetValue(tlsKeys()[data->owner->m_index], 0);
 #else
 #error ThreadSpecific is not implemented for this platform.
@@ -239,6 +270,7 @@ inline void ThreadSpecific<T>::destroy(void* ptr)
 #if !PLATFORM(QT)
     delete data;
 #endif
+#endif
 }
 
 template<typename T>
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.cpp
index 56bf438..49de59e 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.cpp
@@ -49,13 +49,14 @@ static void* threadEntryPoint(void* contextData)
 {
     NewThreadContext* context = reinterpret_cast<NewThreadContext*>(contextData);
 
-    setThreadNameInternal(context->name);
-
-    // Block until our creating thread has completed any extra setup work
+    // Block until our creating thread has completed any extra setup work, including
+    // establishing ThreadIdentifier.
     {
         MutexLocker locker(context->creationMutex);
     }
 
+    initializeCurrentThreadInternal(context->name);
+
     // Grab the info that we need out of the context, then deallocate it.
     ThreadFunction entryPoint = context->entryPoint;
     void* data = context->data;
@@ -75,7 +76,7 @@ ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char*
 
     NewThreadContext* context = new NewThreadContext(entryPoint, data, name);
 
-    // Prevent the thread body from executing until we've established the thread identifier
+    // Prevent the thread body from executing until we've established the thread identifier.
     MutexLocker locker(context->creationMutex);
 
     return createThreadInternal(threadEntryPoint, context, name);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.h
index 5154545..1599562 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Threading.h
@@ -61,7 +61,7 @@
 
 #include "Platform.h"
 
-#if PLATFORM(WINCE)
+#if OS(WINCE)
 #include <windows.h>
 #endif
 
@@ -69,10 +69,12 @@
 #include <wtf/Locker.h>
 #include <wtf/Noncopyable.h>
 
-#if PLATFORM(WIN_OS) && !PLATFORM(WINCE)
+#if OS(WINDOWS) && !OS(WINCE)
 #include <windows.h>
-#elif PLATFORM(DARWIN)
+#elif OS(DARWIN)
 #include <libkern/OSAtomic.h>
+#elif OS(ANDROID)
+#include <cutils/atomic.h>
 #elif COMPILER(GCC)
 #if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 2))
 #include <ext/atomicity.h>
@@ -84,7 +86,7 @@
 #if USE(PTHREADS)
 #include <pthread.h>
 #elif PLATFORM(GTK)
-#include <wtf/GOwnPtr.h>
+#include <wtf/gtk/GOwnPtr.h>
 typedef struct _GMutex GMutex;
 typedef struct _GCond GCond;
 #endif
@@ -119,7 +121,7 @@ ThreadIdentifier createThreadInternal(ThreadFunction, void*, const char* threadN
 
 // Called in the thread during initialization.
 // Helpful for platforms where the thread name must be set from within the thread.
-void setThreadNameInternal(const char* threadName);
+void initializeCurrentThreadInternal(const char* threadName);
 
 ThreadIdentifier currentThread();
 bool isMainThread();
@@ -128,7 +130,11 @@ void detachThread(ThreadIdentifier);
 
 #if USE(PTHREADS)
 typedef pthread_mutex_t PlatformMutex;
+#if HAVE(PTHREAD_RWLOCK)
 typedef pthread_rwlock_t PlatformReadWriteLock;
+#else
+typedef void* PlatformReadWriteLock;
+#endif
 typedef pthread_cond_t PlatformCondition;
 #elif PLATFORM(GTK)
 typedef GOwnPtr<GMutex> PlatformMutex;
@@ -138,7 +144,7 @@ typedef GOwnPtr<GCond> PlatformCondition;
 typedef QT_PREPEND_NAMESPACE(QMutex)* PlatformMutex;
 typedef void* PlatformReadWriteLock; // FIXME: Implement.
 typedef QT_PREPEND_NAMESPACE(QWaitCondition)* PlatformCondition;
-#elif PLATFORM(WIN_OS)
+#elif OS(WINDOWS)
 struct PlatformMutex {
     CRITICAL_SECTION m_internalMutex;
     size_t m_recursionCount;
@@ -211,10 +217,10 @@ private:
     PlatformCondition m_condition;
 };
 
-#if PLATFORM(WIN_OS)
+#if OS(WINDOWS)
 #define WTF_USE_LOCKFREE_THREADSAFESHARED 1
 
-#if COMPILER(MINGW) || COMPILER(MSVC7) || PLATFORM(WINCE)
+#if COMPILER(MINGW) || COMPILER(MSVC7) || OS(WINCE)
 inline int atomicIncrement(int* addend) { return InterlockedIncrement(reinterpret_cast<long*>(addend)); }
 inline int atomicDecrement(int* addend) { return InterlockedDecrement(reinterpret_cast<long*>(addend)); }
 #else
@@ -222,13 +228,18 @@ inline int atomicIncrement(int volatile* addend) { return InterlockedIncrement(r
 inline int atomicDecrement(int volatile* addend) { return InterlockedDecrement(reinterpret_cast<long volatile*>(addend)); }
 #endif
 
-#elif PLATFORM(DARWIN)
+#elif OS(DARWIN)
 #define WTF_USE_LOCKFREE_THREADSAFESHARED 1
 
 inline int atomicIncrement(int volatile* addend) { return OSAtomicIncrement32Barrier(const_cast<int*>(addend)); }
 inline int atomicDecrement(int volatile* addend) { return OSAtomicDecrement32Barrier(const_cast<int*>(addend)); }
 
-#elif COMPILER(GCC) && !PLATFORM(SPARC64) // sizeof(_Atomic_word) != sizeof(int) on sparc64 gcc
+#elif OS(ANDROID)
+
+inline int atomicIncrement(int volatile* addend) { return android_atomic_inc(addend); }
+inline int atomicDecrement(int volatile* addend) { return android_atomic_dec(addend); }
+
+#elif COMPILER(GCC) && !CPU(SPARC64) // sizeof(_Atomic_word) != sizeof(int) on sparc64 gcc
 #define WTF_USE_LOCKFREE_THREADSAFESHARED 1
 
 inline int atomicIncrement(int volatile* addend) { return __gnu_cxx::__exchange_and_add(addend, 1) + 1; }
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingNone.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingNone.cpp
index 46f23d2..2e8a259 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingNone.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingNone.cpp
@@ -30,11 +30,13 @@
 #include "config.h"
 #include "Threading.h"
 
+#if ENABLE(SINGLE_THREADED)
+
 namespace WTF {
 
 void initializeThreading() { }
 ThreadIdentifier createThreadInternal(ThreadFunction, void*, const char*) { return ThreadIdentifier(); }
-void setThreadNameInternal(const char*) { }
+void initializeCurrentThreadInternal(const char*) { }
 int waitForThreadCompletion(ThreadIdentifier, void**) { return 0; }
 void detachThread(ThreadIdentifier) { }
 ThreadIdentifier currentThread() { return ThreadIdentifier(); }
@@ -57,3 +59,5 @@ void lockAtomicallyInitializedStaticMutex() { }
 void unlockAtomicallyInitializedStaticMutex() { }
 
 } // namespace WebCore
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingPthreads.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingPthreads.cpp
index e4fb419..2feb808 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingPthreads.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingPthreads.cpp
@@ -37,6 +37,8 @@
 #include "MainThread.h"
 #include "RandomNumberSeed.h"
 #include "StdLibExtras.h"
+#include "ThreadIdentifierDataPthreads.h"
+#include "ThreadSpecific.h"
 #include "UnusedParam.h"
 #include <errno.h>
 
@@ -45,7 +47,7 @@
 #include <sys/time.h>
 #endif
 
-#if PLATFORM(ANDROID)
+#if OS(ANDROID)
 #include "jni_utility.h"
 #endif
 
@@ -55,10 +57,12 @@ typedef HashMap<ThreadIdentifier, pthread_t> ThreadMap;
 
 static Mutex* atomicallyInitializedStaticMutex;
 
-#if !PLATFORM(DARWIN) || PLATFORM(CHROMIUM)
-static ThreadIdentifier mainThreadIdentifier; // The thread that was the first to call initializeThreading(), which must be the main thread.
+#if !OS(DARWIN) || PLATFORM(CHROMIUM) || USE(WEB_THREAD)
+static pthread_t mainThread; // The thread that was the first to call initializeThreading(), which must be the main thread.
 #endif
 
+void clearPthreadHandleForIdentifier(ThreadIdentifier);
+
 static Mutex& threadMapMutex()
 {
     DEFINE_STATIC_LOCAL(Mutex, mutex, ());
@@ -71,8 +75,8 @@ void initializeThreading()
         atomicallyInitializedStaticMutex = new Mutex;
         threadMapMutex();
         initializeRandomNumberGenerator();
-#if !PLATFORM(DARWIN) || PLATFORM(CHROMIUM)
-        mainThreadIdentifier = currentThread();
+#if !OS(DARWIN) || PLATFORM(CHROMIUM) || USE(WEB_THREAD)
+        mainThread = pthread_self();
 #endif
         initializeMainThread();
     }
@@ -108,7 +112,7 @@ static ThreadIdentifier identifierByPthreadHandle(const pthread_t& pthreadHandle
     return 0;
 }
 
-static ThreadIdentifier establishIdentifierForPthreadHandle(pthread_t& pthreadHandle)
+static ThreadIdentifier establishIdentifierForPthreadHandle(const pthread_t& pthreadHandle)
 {
     ASSERT(!identifierByPthreadHandle(pthreadHandle));
 
@@ -128,7 +132,7 @@ static pthread_t pthreadHandleForIdentifier(ThreadIdentifier id)
     return threadMap().get(id);
 }
 
-static void clearPthreadHandleForIdentifier(ThreadIdentifier id)
+void clearPthreadHandleForIdentifier(ThreadIdentifier id)
 {
     MutexLocker locker(threadMapMutex());
 
@@ -137,7 +141,7 @@ static void clearPthreadHandleForIdentifier(ThreadIdentifier id)
     threadMap().remove(id);
 }
 
-#if PLATFORM(ANDROID)
+#if OS(ANDROID)
 // On the Android platform, threads must be registered with the VM before they run.
 struct ThreadData {
     ThreadFunction entryPoint;
@@ -167,6 +171,7 @@ ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, con
 
     if (pthread_create(&threadHandle, 0, runThreadWithRegistration, static_cast<void*>(threadData))) {
         LOG_ERROR("Failed to create pthread at entry point %p with data %p", entryPoint, data);
+        delete threadData;
         return 0;
     }
     return establishIdentifierForPthreadHandle(threadHandle);
@@ -184,13 +189,17 @@ ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, con
 }
 #endif
 
-void setThreadNameInternal(const char* threadName)
+void initializeCurrentThreadInternal(const char* threadName)
 {
 #if HAVE(PTHREAD_SETNAME_NP)
     pthread_setname_np(threadName);
 #else
     UNUSED_PARAM(threadName);
 #endif
+
+    ThreadIdentifier id = identifierByPthreadHandle(pthread_self());
+    ASSERT(id);
+    ThreadIdentifierData::initialize(id);
 }
 
 int waitForThreadCompletion(ThreadIdentifier threadID, void** result)
@@ -198,12 +207,13 @@ int waitForThreadCompletion(ThreadIdentifier threadID, void** result)
     ASSERT(threadID);
 
     pthread_t pthreadHandle = pthreadHandleForIdentifier(threadID);
+    if (!pthreadHandle)
+        return 0;
 
     int joinResult = pthread_join(pthreadHandle, result);
     if (joinResult == EDEADLK)
         LOG_ERROR("ThreadIdentifier %u was found to be deadlocked trying to quit", threadID);
 
-    clearPthreadHandleForIdentifier(threadID);
     return joinResult;
 }
 
@@ -212,26 +222,30 @@ void detachThread(ThreadIdentifier threadID)
     ASSERT(threadID);
 
     pthread_t pthreadHandle = pthreadHandleForIdentifier(threadID);
+    if (!pthreadHandle)
+        return;
 
     pthread_detach(pthreadHandle);
-
-    clearPthreadHandleForIdentifier(threadID);
 }
 
 ThreadIdentifier currentThread()
 {
-    pthread_t currentThread = pthread_self();
-    if (ThreadIdentifier id = identifierByPthreadHandle(currentThread))
+    ThreadIdentifier id = ThreadIdentifierData::identifier();
+    if (id)
         return id;
-    return establishIdentifierForPthreadHandle(currentThread);
+
+    // Not a WTF-created thread, ThreadIdentifier is not established yet.
+    id = establishIdentifierForPthreadHandle(pthread_self());
+    ThreadIdentifierData::initialize(id);
+    return id;
 }
 
 bool isMainThread()
 {
-#if PLATFORM(DARWIN) && !PLATFORM(CHROMIUM)
+#if OS(DARWIN) && !PLATFORM(CHROMIUM) && !USE(WEB_THREAD)
     return pthread_main_np();
 #else
-    return currentThread() == mainThreadIdentifier;
+    return pthread_equal(pthread_self(), mainThread);
 #endif
 }
 
@@ -270,7 +284,7 @@ void Mutex::unlock()
     ASSERT_UNUSED(result, !result);
 }
 
-
+#if HAVE(PTHREAD_RWLOCK)
 ReadWriteLock::ReadWriteLock()
 {
     pthread_rwlock_init(&m_readWriteLock, NULL);
@@ -324,6 +338,7 @@ void ReadWriteLock::unlock()
     int result = pthread_rwlock_unlock(&m_readWriteLock);
     ASSERT_UNUSED(result, !result);
 }
+#endif  // HAVE(PTHREAD_RWLOCK)
 
 ThreadCondition::ThreadCondition()
 { 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingWin.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingWin.cpp
index cccbda1..73c3f0c 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingWin.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadingWin.cpp
@@ -87,10 +87,10 @@
 #include "Threading.h"
 
 #include "MainThread.h"
-#if !USE(PTHREADS) && PLATFORM(WIN_OS)
+#if !USE(PTHREADS) && OS(WINDOWS)
 #include "ThreadSpecific.h"
 #endif
-#if !PLATFORM(WINCE)
+#if !OS(WINCE)
 #include <process.h>
 #endif
 #if HAVE(ERRNO_H)
@@ -118,7 +118,7 @@ typedef struct tagTHREADNAME_INFO {
 } THREADNAME_INFO;
 #pragma pack(pop)
 
-void setThreadNameInternal(const char* szThreadName)
+void initializeCurrentThreadInternal(const char* szThreadName)
 {
     THREADNAME_INFO info;
     info.dwType = 0x1000;
@@ -161,7 +161,7 @@ void initializeThreading()
         initializeRandomNumberGenerator();
         initializeMainThread();
         mainThreadIdentifier = currentThread();
-        setThreadNameInternal("Main Thread");
+        initializeCurrentThreadInternal("Main Thread");
     }
 }
 
@@ -205,7 +205,7 @@ static unsigned __stdcall wtfThreadEntryPoint(void* param)
 
     void* result = invocation.function(invocation.data);
 
-#if !USE(PTHREADS) && PLATFORM(WIN_OS)
+#if !USE(PTHREADS) && OS(WINDOWS)
     // Do the TLS cleanup.
     ThreadSpecificThreadExit();
 #endif
@@ -218,7 +218,7 @@ ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, con
     unsigned threadIdentifier = 0;
     ThreadIdentifier threadID = 0;
     ThreadFunctionInvocation* invocation = new ThreadFunctionInvocation(entryPoint, data);
-#if PLATFORM(WINCE)
+#if OS(WINCE)
     // This is safe on WINCE, since CRT is in the core and innately multithreaded.
     // On desktop Windows, need to use _beginthreadex (not available on WinCE) if using any CRT functions
     HANDLE threadHandle = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)wtfThreadEntryPoint, invocation, 0, (LPDWORD)&threadIdentifier);
@@ -226,7 +226,7 @@ ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, con
     HANDLE threadHandle = reinterpret_cast<HANDLE>(_beginthreadex(0, 0, wtfThreadEntryPoint, invocation, 0, &threadIdentifier));
 #endif
     if (!threadHandle) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
         LOG_ERROR("Failed to create thread at entry point %p with data %p: %ld", entryPoint, data, ::GetLastError());
 #elif defined(NO_ERRNO)
         LOG_ERROR("Failed to create thread at entry point %p with data %p.", entryPoint, data);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.cpp
index 36fc6c6..9e51ad0 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.cpp
@@ -1,6 +1,6 @@
  /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
- * Copyright (C) 2009 Google Inc. All rights reserved.
+ * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -101,6 +101,20 @@ COMPILE_ASSERT((!IsSameType<int, int*>::value), WTF_IsSameType_int_int_pointer_f
 COMPILE_ASSERT((!IsSameType<bool, const bool>::value), WTF_IsSameType_const_change_false);
 COMPILE_ASSERT((!IsSameType<bool, volatile bool>::value), WTF_IsSameType_volatile_change_false);
 
+template <typename T>
+class TestBaseClass {
+};
+
+class TestDerivedClass : public TestBaseClass<int> {
+};
+
+COMPILE_ASSERT((IsSubclass<TestDerivedClass, TestBaseClass<int> >::value), WTF_Test_IsSubclass_Derived_From_Base);
+COMPILE_ASSERT((!IsSubclass<TestBaseClass<int>, TestDerivedClass>::value), WTF_Test_IsSubclass_Base_From_Derived);
+COMPILE_ASSERT((IsSubclassOfTemplate<TestDerivedClass, TestBaseClass>::value), WTF_Test_IsSubclassOfTemplate_Base_From_Derived);
+COMPILE_ASSERT((IsSameType<RemoveTemplate<TestBaseClass<int>, TestBaseClass>::Type, int>::value), WTF_Test_RemoveTemplate);
+COMPILE_ASSERT((IsSameType<RemoveTemplate<int, TestBaseClass>::Type, int>::value), WTF_Test_RemoveTemplate_WithoutTemplate);
+
+
 COMPILE_ASSERT((IsSameType<bool, RemoveConst<const bool>::Type>::value), WTF_test_RemoveConst_const_bool);
 COMPILE_ASSERT((!IsSameType<bool, RemoveConst<volatile bool>::Type>::value), WTF_test_RemoveConst_volatile_bool);
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.h
index c03e8a7..7ba487f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.h
@@ -1,6 +1,6 @@
  /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
- * Copyright (C) 2009 Google Inc. All rights reserved.
+ * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -104,6 +104,40 @@ namespace WTF {
         static const bool value = true;
     };
 
+    template <typename T, typename U> class IsSubclass {
+        typedef char YesType;
+        struct NoType {
+            char padding[8];
+        };
+
+        static YesType subclassCheck(U*);
+        static NoType subclassCheck(...);
+        static T* t;
+    public:
+        static const bool value = sizeof(subclassCheck(t)) == sizeof(YesType);
+    };
+
+    template <typename T, template<class V> class U> class IsSubclassOfTemplate {
+        typedef char YesType;
+        struct NoType {
+            char padding[8];
+        };
+
+        template<typename W> static YesType subclassCheck(U<W>*);
+        static NoType subclassCheck(...);
+        static T* t;
+    public:
+        static const bool value = sizeof(subclassCheck(t)) == sizeof(YesType);
+    };
+
+    template <typename T, template <class V> class OuterTemplate> struct RemoveTemplate {
+        typedef T Type;
+    };
+
+    template <typename T, template <class V> class OuterTemplate> struct RemoveTemplate<OuterTemplate<T>, OuterTemplate> {
+        typedef T Type;
+    };
+
     template <typename T> struct RemoveConst {
         typedef T Type;
     };
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VMTags.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VMTags.h
index 519f518..1ec79d9 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VMTags.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VMTags.h
@@ -30,7 +30,7 @@
 
 // On Mac OS X, the VM subsystem allows tagging memory requested from mmap and vm_map
 // in order to aid tools that inspect system memory use. 
-#if PLATFORM(DARWIN) && !defined(BUILDING_ON_TIGER)
+#if OS(DARWIN) && !defined(BUILDING_ON_TIGER)
 
 #include <mach/vm_statistics.h>
 
@@ -44,12 +44,12 @@
 #define VM_TAG_FOR_REGISTERFILE_MEMORY VM_MAKE_TAG(65)
 #endif // defined(VM_MEMORY_JAVASCRIPT_CORE) && defined(VM_MEMORY_JAVASCRIPT_JIT_REGISTER_FILE) && defined(VM_MEMORY_JAVASCRIPT_JIT_EXECUTABLE_ALLOCATOR) && defined(VM_MEMORY_JAVASCRIPT_JIT_EXECUTABLE_ALLOCATOR)
 
-#else // PLATFORM(DARWIN) && !defined(BUILDING_ON_TIGER)
+#else // OS(DARWIN) && !defined(BUILDING_ON_TIGER)
 
 #define VM_TAG_FOR_COLLECTOR_MEMORY -1
 #define VM_TAG_FOR_EXECUTABLEALLOCATOR_MEMORY -1
 #define VM_TAG_FOR_REGISTERFILE_MEMORY -1
 
-#endif // PLATFORM(DARWIN) && !defined(BUILDING_ON_TIGER)
+#endif // OS(DARWIN) && !defined(BUILDING_ON_TIGER)
 
 #endif // VMTags_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Vector.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Vector.h
index 7decc4a..8a4ffba 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Vector.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Vector.h
@@ -76,8 +76,15 @@ namespace WTF {
     };
     #endif
 
+    template <size_t size, size_t alignment>
+    void swap(AlignedBuffer<size, alignment>& a, AlignedBuffer<size, alignment>& b)
+    {
+        for (size_t i = 0; i < size; ++i)
+            std::swap(a.buffer[i], b.buffer[i]);
+    }
+
     template <bool needsDestruction, typename T>
-    class VectorDestructor;
+    struct VectorDestructor;
 
     template<typename T>
     struct VectorDestructor<false, T>
@@ -96,7 +103,7 @@ namespace WTF {
     };
 
     template <bool needsInitialization, bool canInitializeWithMemset, typename T>
-    class VectorInitializer;
+    struct VectorInitializer;
 
     template<bool ignore, typename T>
     struct VectorInitializer<false, ignore, T>
@@ -124,7 +131,7 @@ namespace WTF {
     };
 
     template <bool canMoveWithMemcpy, typename T>
-    class VectorMover;
+    struct VectorMover;
 
     template<typename T>
     struct VectorMover<false, T>
@@ -168,7 +175,7 @@ namespace WTF {
     };
 
     template <bool canCopyWithMemcpy, typename T>
-    class VectorCopier;
+    struct VectorCopier;
 
     template<typename T>
     struct VectorCopier<false, T>
@@ -193,7 +200,7 @@ namespace WTF {
     };
 
     template <bool canFillWithMemset, typename T>
-    class VectorFiller;
+    struct VectorFiller;
 
     template<typename T>
     struct VectorFiller<false, T>
@@ -218,7 +225,7 @@ namespace WTF {
     };
     
     template<bool canCompareWithMemcmp, typename T>
-    class VectorComparer;
+    struct VectorComparer;
     
     template<typename T>
     struct VectorComparer<false, T>
@@ -417,6 +424,27 @@ namespace WTF {
             Base::deallocateBuffer(bufferToDeallocate);
         }
         
+        void swap(VectorBuffer<T, inlineCapacity>& other)
+        {
+            if (buffer() == inlineBuffer() && other.buffer() == other.inlineBuffer()) {
+                WTF::swap(m_inlineBuffer, other.m_inlineBuffer);
+                std::swap(m_capacity, other.m_capacity);
+            } else if (buffer() == inlineBuffer()) {
+                m_buffer = other.m_buffer;
+                other.m_buffer = other.inlineBuffer();
+                WTF::swap(m_inlineBuffer, other.m_inlineBuffer);
+                std::swap(m_capacity, other.m_capacity);
+            } else if (other.buffer() == other.inlineBuffer()) {
+                other.m_buffer = m_buffer;
+                m_buffer = inlineBuffer();
+                WTF::swap(m_inlineBuffer, other.m_inlineBuffer);
+                std::swap(m_capacity, other.m_capacity);
+            } else {
+                std::swap(m_buffer, other.m_buffer);
+                std::swap(m_capacity, other.m_capacity);
+            }
+        }
+
         void restoreInlineBufferIfNeeded()
         {
             if (m_buffer)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VectorTraits.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VectorTraits.h
index eb4c279..bf77878 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VectorTraits.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/VectorTraits.h
@@ -32,7 +32,7 @@ using std::pair;
 namespace WTF {
 
     template<bool isPod, typename T>
-    class VectorTraitsBase;
+    struct VectorTraitsBase;
 
     template<typename T>
     struct VectorTraitsBase<false, T>
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/android/AndroidThreading.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/android/AndroidThreading.h
new file mode 100644
index 0000000..27f548c
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/android/AndroidThreading.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2009, The Android Open Source Project
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef AndroidThreading_h
+#define AndroidThreading_h
+
+namespace WTF {
+
+// An interface to the embedding layer, which provides threading support.
+class AndroidThreading {
+public:
+    static void scheduleDispatchFunctionsOnMainThread();
+};
+
+} // namespace WTF
+
+#endif // AndroidThreading_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/android/MainThreadAndroid.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/android/MainThreadAndroid.cpp
new file mode 100644
index 0000000..5e5f7b1
--- /dev/null
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/android/MainThreadAndroid.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2009, The Android Open Source Project
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "MainThread.h"
+
+#include "AndroidThreading.h"
+
+namespace WTF {
+
+void initializeMainThreadPlatform()
+{
+}
+
+void scheduleDispatchFunctionsOnMainThread()
+{
+    AndroidThreading::scheduleDispatchFunctionsOnMainThread();
+}
+
+} // namespace WTF
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.cpp
index d75c17a..6289d04 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.cpp
@@ -140,7 +140,6 @@
 #else
 #define NO_ERRNO
 #endif
-#include <float.h>
 #include <math.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -148,6 +147,7 @@
 #include <wtf/AlwaysInline.h>
 #include <wtf/Assertions.h>
 #include <wtf/FastMalloc.h>
+#include <wtf/MathExtras.h>
 #include <wtf/Vector.h>
 #include <wtf/Threading.h>
 
@@ -159,9 +159,9 @@
 #pragma warning(disable: 4554)
 #endif
 
-#if PLATFORM(BIG_ENDIAN)
+#if CPU(BIG_ENDIAN)
 #define IEEE_MC68k
-#elif PLATFORM(MIDDLE_ENDIAN)
+#elif CPU(MIDDLE_ENDIAN)
 #define IEEE_ARM
 #else
 #define IEEE_8087
@@ -262,7 +262,8 @@ typedef union { double d; uint32_t L[2]; } U;
 #define Pack_32
 #endif
 
-#if PLATFORM(PPC64) || PLATFORM(X86_64)
+#if CPU(PPC64) || CPU(X86_64)
+// FIXME: should we enable this on all 64-bit CPUs?
 // 64-bit emulation provided by the compiler is likely to be slower than dtoa own code on 32-bit hardware.
 #define USE_LONG_LONG
 #endif
@@ -560,7 +561,7 @@ static void mult(BigInt& aRef, const BigInt& bRef)
     aRef = c;
 }
 
-struct P5Node {
+struct P5Node : Noncopyable {
     BigInt val;
     P5Node* next;
 };
@@ -1869,7 +1870,7 @@ static ALWAYS_INLINE int quorem(BigInt& b, BigInt& S)
  *       calculation.
  */
 
-void dtoa(char* result, double dd, int ndigits, int* decpt, int* sign, char** rve)
+void dtoa(DtoaBuffer result, double dd, int ndigits, int* decpt, int* sign, char** rve)
 {
     /*
         Arguments ndigits, decpt, sign are similar to those
@@ -1908,16 +1909,23 @@ void dtoa(char* result, double dd, int ndigits, int* decpt, int* sign, char** rv
     {
         /* Infinity or NaN */
         *decpt = 9999;
-        if (!word1(&u) && !(word0(&u) & 0xfffff))
+        if (!word1(&u) && !(word0(&u) & 0xfffff)) {
             strcpy(result, "Infinity");
-        else 
+            if (rve)
+                *rve = result + 8;
+        } else {
             strcpy(result, "NaN");
+            if (rve)
+                *rve = result + 3;
+        }
         return;
     }
     if (!dval(&u)) {
         *decpt = 1;
         result[0] = '0';
         result[1] = '\0';
+        if (rve)
+            *rve = result + 1;
         return;
     }
 
@@ -2376,4 +2384,83 @@ ret:
         *rve = s;
 }
 
+static ALWAYS_INLINE void append(char*& next, const char* src, unsigned size)
+{
+    for (unsigned i = 0; i < size; ++i)
+        *next++ = *src++;
+}
+
+void doubleToStringInJavaScriptFormat(double d, DtoaBuffer buffer, unsigned* resultLength)
+{
+    ASSERT(buffer);
+
+    // avoid ever printing -NaN, in JS conceptually there is only one NaN value
+    if (isnan(d)) {
+        append(buffer, "NaN", 3);
+        if (resultLength)
+            *resultLength = 3;
+        return;
+    }
+    // -0 -> "0"
+    if (!d) {
+        buffer[0] = '0';
+        if (resultLength)
+            *resultLength = 1;
+        return;
+    }
+
+    int decimalPoint;
+    int sign;
+
+    DtoaBuffer result;
+    char* resultEnd = 0;
+    WTF::dtoa(result, d, 0, &decimalPoint, &sign, &resultEnd);
+    int length = resultEnd - result;
+
+    char* next = buffer;
+    if (sign)
+        *next++ = '-';
+
+    if (decimalPoint <= 0 && decimalPoint > -6) {
+        *next++ = '0';
+        *next++ = '.';
+        for (int j = decimalPoint; j < 0; j++)
+            *next++ = '0';
+        append(next, result, length);
+    } else if (decimalPoint <= 21 && decimalPoint > 0) {
+        if (length <= decimalPoint) {
+            append(next, result, length);
+            for (int j = 0; j < decimalPoint - length; j++)
+                *next++ = '0';
+        } else {
+            append(next, result, decimalPoint);
+            *next++ = '.';
+            append(next, result + decimalPoint, length - decimalPoint);
+        }
+    } else if (result[0] < '0' || result[0] > '9')
+        append(next, result, length);
+    else {
+        *next++ = result[0];
+        if (length > 1) {
+            *next++ = '.';
+            append(next, result + 1, length - 1);
+        }
+
+        *next++ = 'e';
+        *next++ = (decimalPoint >= 0) ? '+' : '-';
+        // decimalPoint can't be more than 3 digits decimal given the
+        // nature of float representation
+        int exponential = decimalPoint - 1;
+        if (exponential < 0)
+            exponential = -exponential;
+        if (exponential >= 100)
+            *next++ = static_cast<char>('0' + exponential / 100);
+        if (exponential >= 10)
+            *next++ = static_cast<char>('0' + (exponential % 100) / 10);
+        *next++ = static_cast<char>('0' + exponential % 10);
+    }
+    if (resultLength)
+        *resultLength = next - buffer;
+}
+
 } // namespace WTF
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.h
index cbec7c7..6127f53 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/dtoa.h
@@ -30,8 +30,18 @@ namespace WTF {
     extern WTF::Mutex* s_dtoaP5Mutex;
 
     double strtod(const char* s00, char** se);
-    void dtoa(char* result, double d, int ndigits, int* decpt, int* sign, char** rve);
+
+    typedef char DtoaBuffer[80];
+    void dtoa(DtoaBuffer result, double d, int ndigits, int* decpt, int* sign, char** rve);
+
+    // dtoa() for ECMA-262 'ToString Applied to the Number Type.'
+    // The *resultLength will have the length of the resultant string in bufer.
+    // The resultant string isn't terminated by 0.
+    void doubleToStringInJavaScriptFormat(double, DtoaBuffer, unsigned* resultLength);
 
 } // namespace WTF
 
+using WTF::DtoaBuffer;
+using WTF::doubleToStringInJavaScriptFormat;
+
 #endif // WTF_dtoa_h
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/qt/ThreadingQt.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/qt/ThreadingQt.cpp
index 5a84764..3e5aa59 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/qt/ThreadingQt.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/qt/ThreadingQt.cpp
@@ -29,6 +29,8 @@
 #include "config.h"
 #include "Threading.h"
 
+#if !ENABLE(SINGLE_THREADED)
+
 #include "CurrentTime.h"
 #include "HashMap.h"
 #include "MainThread.h"
@@ -66,6 +68,21 @@ void ThreadPrivate::run()
     m_returnValue = m_entryPoint(m_data);
 }
 
+class ThreadMonitor : public QObject {
+    Q_OBJECT
+public:
+    static ThreadMonitor * instance()
+    {
+        static ThreadMonitor *instance = new ThreadMonitor();
+        return instance;
+    }
+
+public Q_SLOTS:
+    void threadFinished()
+    {
+        sender()->deleteLater();
+    }
+};
 
 static Mutex* atomicallyInitializedStaticMutex;
 
@@ -157,6 +174,9 @@ ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, con
         LOG_ERROR("Failed to create thread at entry point %p with data %p", entryPoint, data);
         return 0;
     }
+
+    QObject::connect(thread, SIGNAL(finished()), ThreadMonitor::instance(), SLOT(threadFinished()));
+
     thread->start();
 
     QThread* threadRef = static_cast<QThread*>(thread);
@@ -164,7 +184,7 @@ ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, con
     return establishIdentifierForThread(threadRef);
 }
 
-void setThreadNameInternal(const char*)
+void initializeCurrentThreadInternal(const char*)
 {
 }
 
@@ -183,8 +203,10 @@ int waitForThreadCompletion(ThreadIdentifier threadID, void** result)
     return !res;
 }
 
-void detachThread(ThreadIdentifier)
+void detachThread(ThreadIdentifier threadID)
 {
+    ASSERT(threadID);
+    clearThreadForIdentifier(threadID);
 }
 
 ThreadIdentifier currentThread()
@@ -269,3 +291,7 @@ void ThreadCondition::broadcast()
 }
 
 } // namespace WebCore
+
+#include "ThreadingQt.moc"
+
+#endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/UTF8.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/UTF8.cpp
index 9e713fe..21d5856 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/UTF8.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/UTF8.cpp
@@ -23,6 +23,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
+#include "config.h"
 #include "UTF8.h"
 
 namespace WTF {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/Unicode.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/Unicode.h
index 7016a03..d59439d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/Unicode.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/Unicode.h
@@ -26,11 +26,7 @@
 #include <wtf/Assertions.h>
 
 #if USE(QT4_UNICODE)
-#if COMPILER(WINSCW) || COMPILER(RVCT)
-#include "wtf/unicode/qt4/UnicodeQt4.h"
-#else
 #include "qt4/UnicodeQt4.h"
-#endif
 #elif USE(ICU_UNICODE)
 #include <wtf/unicode/icu/UnicodeIcu.h>
 #elif USE(GLIB_UNICODE)
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.cpp
index a779b36..e20c376 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.cpp
@@ -19,6 +19,7 @@
  *
  */
 
+#include "config.h"
 #include "UnicodeGLib.h"
 
 namespace WTF {
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.h
index c03d3ec..d72e707 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/glib/UnicodeGLib.h
@@ -26,7 +26,7 @@
 #define UnicodeGLib_h
 
 #include "UnicodeMacrosFromICU.h"
-#include <wtf/GOwnPtr.h>
+#include <wtf/gtk/GOwnPtr.h>
 
 #include <glib.h>
 #include <pango/pango.h>
@@ -152,6 +152,11 @@ inline bool isArabicChar(UChar32 c)
     return c >= 0x0600 && c <= 0x06FF;
 }
 
+inline bool isAlphanumeric(UChar32 c)
+{
+    return g_unichar_isalnum(c);
+}
+
 inline bool isFormatChar(UChar32 c)
 {
     return g_unichar_type(c) == G_UNICODE_FORMAT;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/CollatorICU.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/CollatorICU.cpp
index 6376bb3..a1753a4 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/CollatorICU.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/CollatorICU.cpp
@@ -36,7 +36,7 @@
 #include <unicode/ucol.h>
 #include <string.h>
 
-#if PLATFORM(DARWIN)
+#if OS(DARWIN)
 #include "RetainPtr.h"
 #include <CoreFoundation/CoreFoundation.h>
 #endif
@@ -59,9 +59,9 @@ Collator::Collator(const char* locale)
 
 std::auto_ptr<Collator> Collator::userDefault()
 {
-#if PLATFORM(DARWIN) && PLATFORM(CF)
+#if OS(DARWIN) && PLATFORM(CF)
     // Mac OS X doesn't set UNIX locale to match user-selected one, so ICU default doesn't work.
-#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !PLATFORM(IPHONE)
+#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !OS(IPHONE_OS)
     RetainPtr<CFLocaleRef> currentLocale(AdoptCF, CFLocaleCopyCurrent());
     CFStringRef collationOrder = (CFStringRef)CFLocaleGetValue(currentLocale.get(), kCFLocaleCollatorIdentifier);
 #else
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/UnicodeIcu.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/UnicodeIcu.h
index 35c6fbf..a2a5c0a 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/UnicodeIcu.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/UnicodeIcu.h
@@ -164,6 +164,11 @@ inline bool isArabicChar(UChar32 c)
       return ublock_getCode(c) == UBLOCK_ARABIC;
 }
 
+inline bool isAlphanumeric(UChar32 c)
+{
+    return u_isalnum(c);
+}
+
 inline bool isSeparatorSpace(UChar32 c)
 {
     return u_charType(c) == U_SPACE_SEPARATOR;
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/qt4/UnicodeQt4.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/qt4/UnicodeQt4.h
index e01f825..1c7a692f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/qt4/UnicodeQt4.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/qt4/UnicodeQt4.h
@@ -30,7 +30,6 @@
 
 #include <stdint.h>
 
-#if QT_VERSION >= 0x040300
 QT_BEGIN_NAMESPACE
 namespace QUnicodeTables {
     struct Properties {
@@ -55,7 +54,6 @@ namespace QUnicodeTables {
     Q_CORE_EXPORT const Properties * QT_FASTCALL properties(ushort ucs2);
 }
 QT_END_NAMESPACE
-#endif
 
 // ugly hack to make UChar compatible with JSChar in API/JSStringRef.h
 #if defined(Q_OS_WIN) || COMPILER(WINSCW)
@@ -188,8 +186,6 @@ enum CharCategory {
 };
 
 
-#if QT_VERSION >= 0x040300
-
 // FIXME: handle surrogates correctly in all methods
 
 inline UChar32 toLower(UChar32 ch)
@@ -408,138 +404,6 @@ inline CharCategory category(UChar32 c)
     return (CharCategory) U_MASK(QChar::category(c));
 }
 
-#else
-
-inline UChar32 toLower(UChar32 ch)
-{
-    if (ch > 0xffff)
-        return ch;
-    return QChar((unsigned short)ch).toLower().unicode();
-}
-
-inline int toLower(UChar* result, int resultLength, const UChar* src, int srcLength,  bool* error)
-{
-  *error = false;
-  if (resultLength < srcLength) {
-    *error = true;
-    return srcLength;
-  }
-  for (int i = 0; i < srcLength; ++i)
-    result[i] = QChar(src[i]).toLower().unicode();
-  return srcLength;
-}
-
-inline UChar32 toUpper(UChar32 ch)
-{
-    if (ch > 0xffff)
-        return ch;
-    return QChar((unsigned short)ch).toUpper().unicode();
-}
-
-inline int toUpper(UChar* result, int resultLength, const UChar* src, int srcLength,  bool* error)
-{
-    *error = false;
-    if (resultLength < srcLength) {
-        *error = true;
-        return srcLength;
-    }
-    for (int i = 0; i < srcLength; ++i)
-        result[i] = QChar(src[i]).toUpper().unicode();
-    return srcLength;
-}
-
-inline int toTitleCase(UChar32 c)
-{
-    if (c > 0xffff)
-        return c;
-    return QChar((unsigned short)c).toUpper().unicode();
-}
-
-inline UChar32 foldCase(UChar32 c)
-{
-    if (c > 0xffff)
-        return c;
-    return QChar((unsigned short)c).toLower().unicode();
-}
-
-inline int foldCase(UChar* result, int resultLength, const UChar* src, int srcLength,  bool* error)
-{
-    return toLower(result, resultLength, src, srcLength, error);
-}
-
-inline bool isPrintableChar(UChar32 c)
-{
-    return (c & 0xffff0000) == 0 && QChar((unsigned short)c).isPrint();
-}
-
-inline bool isArabicChar(UChar32 c)
-{
-    return c >= 0x0600 && c <= 0x06FF;
-}
-
-inline bool isSeparatorSpace(UChar32 c)
-{
-    return (c & 0xffff0000) == 0 && QChar((unsigned short)c).category() == QChar::Separator_Space;
-}
-
-inline bool isPunct(UChar32 c)
-{
-    return (c & 0xffff0000) == 0 && QChar((unsigned short)c).isPunct();
-}
-
-inline bool isLower(UChar32 c)
-{
-    return (c & 0xffff0000) == 0 && QChar((unsigned short)c).category() == QChar::Letter_Lowercase;
-}
-
-inline UChar32 mirroredChar(UChar32 c)
-{
-    if (c > 0xffff)
-        return c;
-    return QChar(c).mirroredChar().unicode();
-}
-
-inline uint8_t combiningClass(UChar32 c)
-{
-    if (c > 0xffff)
-        return 0;
-    return QChar((unsigned short)c).combiningClass();
-}
-
-inline DecompositionType decompositionType(UChar32 c)
-{
-    if (c > 0xffff)
-        return DecompositionNone;
-    return (DecompositionType)QChar(c).decompositionTag();
-}
-
-inline int umemcasecmp(const UChar* a, const UChar* b, int len)
-{
-    for (int i = 0; i < len; ++i) {
-        QChar c1 = QChar(a[i]).toLower();
-        QChar c2 = QChar(b[i]).toLower();
-        if (c1 != c2)
-        return c1.unicode() - c2.unicode();
-    }
-    return 0;
-}
-
-inline Direction direction(UChar32 c)
-{
-    if (c > 0xffff)
-        return LeftToRight;
-    return (Direction)QChar(c).direction();
-}
-
-inline CharCategory category(UChar32 c)
-{
-    if (c > 0xffff)
-        return NoCategory;
-    return (CharCategory) U_MASK(QChar(c).category());
-}
-
-#endif
-
 } }
 
 #endif // WTF_UNICODE_QT4_H
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/wince/UnicodeWince.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/wince/UnicodeWince.cpp
index 966f2a1..2df44f8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/wince/UnicodeWince.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/wince/UnicodeWince.cpp
@@ -19,6 +19,7 @@
  *  Boston, MA 02110-1301, USA.
  */
 
+#include "config.h"
 #include "UnicodeWince.h"
 
 #include <wchar.h>
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/FastMallocWince.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/FastMallocWince.h
index 93d9f75..37174f0 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/FastMallocWince.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/FastMallocWince.h
@@ -1,5 +1,4 @@
 /*
- *  This file is part of the KDE libraries
  *  Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2007-2009 Torch Mobile, Inc. All rights reserved
  *
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/MemoryManager.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/MemoryManager.cpp
index b65b368..81d4f80 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/MemoryManager.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/wince/MemoryManager.cpp
@@ -139,25 +139,25 @@ void* fastZeroedMalloc(size_t n)
     return p;
 }
 
-void* tryFastMalloc(size_t n)
+TryMallocReturnValue tryFastMalloc(size_t n)
 {
     MemoryAllocationCanFail canFail;
     return fastMalloc(n);
 }
 
-void* tryFastZeroedMalloc(size_t n)
+TryMallocReturnValue tryFastZeroedMalloc(size_t n)
 {
     MemoryAllocationCanFail canFail;
     return fastZeroedMalloc(n);
 }
 
-void* tryFastCalloc(size_t n_elements, size_t element_size)
+TryMallocReturnValue tryFastCalloc(size_t n_elements, size_t element_size)
 {
     MemoryAllocationCanFail canFail;
     return fastCalloc(n_elements, element_size);
 }
 
-void* tryFastRealloc(void* p, size_t n)
+TryMallocReturnValue tryFastRealloc(void* p, size_t n)
 {
     MemoryAllocationCanFail canFail;
     return fastRealloc(p, n);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexCompiler.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexCompiler.cpp
index c7b3c81..9cd3d12 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexCompiler.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexCompiler.cpp
@@ -708,7 +708,7 @@ const char* compileRegex(const UString& patternString, RegexPattern& pattern)
         unsigned numSubpatterns = pattern.m_numSubpatterns;
 
         constructor.reset();
-#ifndef NDEBUG
+#if !ASSERT_DISABLED
         const char* error =
 #endif
             parse(constructor, patternString, numSubpatterns);
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexInterpreter.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexInterpreter.cpp
index aafea3c..d088086 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexInterpreter.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexInterpreter.cpp
@@ -1490,7 +1490,7 @@ public:
         closeBodyAlternative();
     }
 
-    void alterantiveBodyDisjunction()
+    void alternativeBodyDisjunction()
     {
         int newAlternativeIndex = m_bodyDisjunction->terms.size();
         m_bodyDisjunction->terms[m_currentAlternativeIndex].alternative.next = newAlternativeIndex - m_currentAlternativeIndex;
@@ -1499,7 +1499,7 @@ public:
         m_currentAlternativeIndex = newAlternativeIndex;
     }
 
-    void alterantiveDisjunction()
+    void alternativeDisjunction()
     {
         int newAlternativeIndex = m_bodyDisjunction->terms.size();
         m_bodyDisjunction->terms[m_currentAlternativeIndex].alternative.next = newAlternativeIndex - m_currentAlternativeIndex;
@@ -1515,9 +1515,9 @@ public:
 
             if (alt) {
                 if (disjunction == m_pattern.m_body)
-                    alterantiveBodyDisjunction();
+                    alternativeBodyDisjunction();
                 else
-                    alterantiveDisjunction();
+                    alternativeDisjunction();
             }
 
             PatternAlternative* alternative = disjunction->m_alternatives[alt];
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.cpp
index d777424..fcb8d86 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.cpp
@@ -44,7 +44,7 @@ namespace JSC { namespace Yarr {
 class RegexGenerator : private MacroAssembler {
     friend void jitCompileRegex(JSGlobalData* globalData, RegexCodeBlock& jitObject, const UString& pattern, unsigned& numSubpatterns, const char*& error, bool ignoreCase, bool multiline);
 
-#if PLATFORM(ARM)
+#if CPU(ARM)
     static const RegisterID input = ARMRegisters::r0;
     static const RegisterID index = ARMRegisters::r1;
     static const RegisterID length = ARMRegisters::r2;
@@ -54,7 +54,7 @@ class RegexGenerator : private MacroAssembler {
     static const RegisterID regT1 = ARMRegisters::r6;
 
     static const RegisterID returnRegister = ARMRegisters::r0;
-#elif PLATFORM(X86)
+#elif CPU(X86)
     static const RegisterID input = X86Registers::eax;
     static const RegisterID index = X86Registers::edx;
     static const RegisterID length = X86Registers::ecx;
@@ -64,7 +64,7 @@ class RegexGenerator : private MacroAssembler {
     static const RegisterID regT1 = X86Registers::esi;
 
     static const RegisterID returnRegister = X86Registers::eax;
-#elif PLATFORM(X86_64)
+#elif CPU(X86_64)
     static const RegisterID input = X86Registers::edi;
     static const RegisterID index = X86Registers::esi;
     static const RegisterID length = X86Registers::edx;
@@ -1264,7 +1264,7 @@ class RegexGenerator : private MacroAssembler {
         // complex here in compilation, and in the common case we should end up coallescing the checks.
         //
         // FIXME: a nice improvement here may be to stop trying to match sooner, based on the least
-        // of the minimum-alterantive-lengths.  E.g. if I have two alternatives of length 200 and 150,
+        // of the minimum-alternative-lengths.  E.g. if I have two alternatives of length 200 and 150,
         // and a string of length 100, we'll end up looping index from 0 to 100, checking whether there
         // is sufficient input to run either alternative (constantly failing).  If there had been only
         // one alternative, or if the shorter alternative had come first, we would have terminated
@@ -1288,11 +1288,11 @@ class RegexGenerator : private MacroAssembler {
 
     void generateEnter()
     {
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         push(X86Registers::ebp);
         move(stackPointerRegister, X86Registers::ebp);
         push(X86Registers::ebx);
-#elif PLATFORM(X86)
+#elif CPU(X86)
         push(X86Registers::ebp);
         move(stackPointerRegister, X86Registers::ebp);
         // TODO: do we need spill registers to fill the output pointer if there are no sub captures?
@@ -1308,10 +1308,7 @@ class RegexGenerator : private MacroAssembler {
     #else
         loadPtr(Address(X86Registers::ebp, 2 * sizeof(void*)), output);
     #endif
-#elif PLATFORM(ARM)
-#if PLATFORM(ARM_TRADITIONAL)
-        push(ARMRegisters::lr);
-#endif
+#elif CPU(ARM)
         push(ARMRegisters::r4);
         push(ARMRegisters::r5);
         push(ARMRegisters::r6);
@@ -1321,15 +1318,15 @@ class RegexGenerator : private MacroAssembler {
 
     void generateReturn()
     {
-#if PLATFORM(X86_64)
+#if CPU(X86_64)
         pop(X86Registers::ebx);
         pop(X86Registers::ebp);
-#elif PLATFORM(X86)
+#elif CPU(X86)
         pop(X86Registers::esi);
         pop(X86Registers::edi);
         pop(X86Registers::ebx);
         pop(X86Registers::ebp);
-#elif PLATFORM(ARM)
+#elif CPU(ARM)
         pop(ARMRegisters::r6);
         pop(ARMRegisters::r5);
         pop(ARMRegisters::r4);
@@ -1400,14 +1397,6 @@ void jitCompileRegex(JSGlobalData* globalData, RegexCodeBlock& jitObject, const
     }
 }
 
-int executeRegex(RegexCodeBlock& jitObject, const UChar* input, unsigned start, unsigned length, int* output, int outputArraySize)
-{
-    if (JSRegExp* fallback = jitObject.getFallback())
-        return (jsRegExpExecute(fallback, input, length, start, output, outputArraySize) < 0) ? -1 : output[0];
-
-    return jitObject.execute(input, start, length, output);
-}
-
 }}
 
 #endif
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.h b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.h
index 5b0df9d..5ead00f 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexJIT.h
@@ -37,7 +37,7 @@
 #include <pcre.h>
 struct JSRegExp; // temporary, remove when fallback is removed.
 
-#if PLATFORM(X86) && !COMPILER(MSVC)
+#if CPU(X86) && !COMPILER(MSVC)
 #define YARR_CALL __attribute__ ((regparm (3)))
 #else
 #define YARR_CALL
@@ -73,7 +73,7 @@ public:
 
     int execute(const UChar* input, unsigned start, unsigned length, int* output)
     {
-        return reinterpret_cast<RegexJITCode>(m_ref.m_code.executableAddress())(input, start, length, output);
+        return ((RegexJITCode)(m_ref.m_code.executableAddress()))(input, start, length, output);
     }
 
 private:
@@ -82,7 +82,14 @@ private:
 };
 
 void jitCompileRegex(JSGlobalData* globalData, RegexCodeBlock& jitObject, const UString& pattern, unsigned& numSubpatterns, const char*& error, bool ignoreCase = false, bool multiline = false);
-int executeRegex(RegexCodeBlock& jitObject, const UChar* input, unsigned start, unsigned length, int* output, int outputArraySize);
+
+inline int executeRegex(RegexCodeBlock& jitObject, const UChar* input, unsigned start, unsigned length, int* output, int outputArraySize)
+{
+    if (JSRegExp* fallback = jitObject.getFallback())
+        return (jsRegExpExecute(fallback, input, length, start, output, outputArraySize) < 0) ? -1 : output[0];
+
+    return jitObject.execute(input, start, length, output);
+}
 
 } } // namespace JSC::Yarr
 
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexPattern.h b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexPattern.h
index a451131..dd7512d 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexPattern.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/yarr/RegexPattern.h
@@ -137,7 +137,7 @@ struct PatternTerm {
 
     PatternTerm(unsigned spatternId)
         : type(TypeBackReference)
-        , invertOrCapture(invertOrCapture)
+        , invertOrCapture(false)
     {
         subpatternId = spatternId;
         quantityType = QuantifierFixedCount;
diff --git a/src/3rdparty/javascriptcore/VERSION b/src/3rdparty/javascriptcore/VERSION
index d75862d..6351105 100644
--- a/src/3rdparty/javascriptcore/VERSION
+++ b/src/3rdparty/javascriptcore/VERSION
@@ -4,8 +4,8 @@ This is a snapshot of JavaScriptCore from
 
 The commit imported was from the
 
-        jsc-for-qtscript-4.6-staging-06102009 branch/tag
+        javascriptcore-snapshot-23022010 branch/tag
 
 and has the sha1 checksum
 
-        32d226eb14d44f80e9ec96d4ca2c595181eeeca3
+        8a21225144f7c1e10ffcb9aa7a545164d9495bf2
diff --git a/src/3rdparty/javascriptcore/WebKit.pri b/src/3rdparty/javascriptcore/WebKit.pri
index 16f89bf..0dd0799 100644
--- a/src/3rdparty/javascriptcore/WebKit.pri
+++ b/src/3rdparty/javascriptcore/WebKit.pri
@@ -1,5 +1,16 @@
 # Include file to make it easy to include WebKit into Qt projects
 
+# Detect that we are building as a standalone package by the presence of
+# either the generated files directory or as part of the Qt package through
+# QTDIR_build
+CONFIG(QTDIR_build): CONFIG += standalone_package
+else:exists($$PWD/WebCore/generated): CONFIG += standalone_package
+
+CONFIG(standalone_package) {
+    OUTPUT_DIR=$$PWD
+}
+
+CONFIG += depend_includepath
 
 isEmpty(OUTPUT_DIR) {
     CONFIG(debug, debug|release) {
@@ -17,19 +28,28 @@ building-libs {
         QT += webkit
     } else {
         QMAKE_LIBDIR = $$OUTPUT_DIR/lib $$QMAKE_LIBDIR
+        QTWEBKITLIBNAME = QtWebKit
         mac:!static:contains(QT_CONFIG, qt_framework):!CONFIG(webkit_no_framework) {
-            LIBS += -framework QtWebKit
+            LIBS += -framework $$QTWEBKITLIBNAME
             QMAKE_FRAMEWORKPATH = $$OUTPUT_DIR/lib $$QMAKE_FRAMEWORKPATH
         } else {
             win32-*|wince* {
-                LIBS += -lQtWebKit$${QT_MAJOR_VERSION}
+                CONFIG(debug, debug|release):build_pass: QTWEBKITLIBNAME = $${QTWEBKITLIBNAME}d
+                QTWEBKITLIBNAME = $${QTWEBKITLIBNAME}$${QT_MAJOR_VERSION}
+                win32-g++: LIBS += -l$$QTWEBKITLIBNAME
+                else: LIBS += $${QTWEBKITLIBNAME}.lib
             } else {
                 LIBS += -lQtWebKit
+                symbian {
+                    TARGET.EPOCSTACKSIZE = 0x14000 // 80 kB
+                    TARGET.EPOCHEAPSIZE = 0x20000 0x2000000 // Min 128kB, Max 32MB
+                }
             }
         }
     }
     DEPENDPATH += $$PWD/WebKit/qt/Api
 }
+greaterThan(QT_MINOR_VERSION, 5):DEFINES += WTF_USE_ACCELERATED_COMPOSITING
 
 !mac:!unix|symbian {
     DEFINES += USE_SYSTEM_MALLOC
@@ -43,15 +63,13 @@ BASE_DIR = $$PWD
 INCLUDEPATH += $$PWD/WebKit/qt/Api
 
 CONFIG -= warn_on
-*-g++*:QMAKE_CXXFLAGS += -Wreturn-type -fno-strict-aliasing
-#QMAKE_CXXFLAGS += -Wall -Wno-undef -Wno-unused-parameter
+*-g++*:QMAKE_CXXFLAGS += -Wall -Wreturn-type -fno-strict-aliasing -Wcast-align -Wchar-subscripts -Wformat-security -Wreturn-type -Wno-unused-parameter -Wno-sign-compare -Wno-switch -Wno-switch-enum -Wundef -Wmissing-noreturn -Winit-self
 
 # Enable GNU compiler extensions to the ARM compiler for all Qt ports using RVCT
 symbian|*-armcc {
     RVCT_COMMON_CFLAGS = --gnu --diag_suppress 68,111,177,368,830,1293
     RVCT_COMMON_CXXFLAGS = $$RVCT_COMMON_CFLAGS --no_parse_templates
-    DEFINES *= QT_NO_UITOOLS
-} 
+}
 
 *-armcc {
     QMAKE_CFLAGS += $$RVCT_COMMON_CFLAGS
@@ -62,75 +80,11 @@ symbian {
     QMAKE_CXXFLAGS.ARMCC += $$RVCT_COMMON_CXXFLAGS
 }
 
+symbian|maemo5: DEFINES *= QT_NO_UITOOLS
+
 contains(DEFINES, QT_NO_UITOOLS): CONFIG -= uitools
 
 # Disable a few warnings on Windows. The warnings are also
 # disabled in WebKitLibraries/win/tools/vsprops/common.vsprops
-win32-msvc*: QMAKE_CXXFLAGS += -wd4291 -wd4344 -wd4503 -wd4800 -wd4819 -wd4996
-
-#
-# For builds inside Qt we interpret the output rule and the input of each extra compiler manually
-# and add the resulting sources to the SOURCES variable, because the build inside Qt contains already
-# all the generated files. We do not need to generate any extra compiler rules in that case.
-#
-# In addition this function adds a new target called 'generated_files' that allows manually calling
-# all the extra compilers to generate all the necessary files for the build using 'make generated_files'
-#
-defineTest(addExtraCompiler) {
-    CONFIG(QTDIR_build) {
-        outputRule = $$eval($${1}.output)
-        outVariable = $$eval($${1}.variable_out)
-        !isEqual(outVariable,GENERATED_SOURCES):return(true)
-
-        input = $$eval($${1}.input)
-        input = $$eval($$input)
-
-        for(file,input) {
-            base = $$basename(file)
-            base ~= s/\..+//
-            newfile=$$replace(outputRule,\\$\\{QMAKE_FILE_BASE\\},$$base)
-            SOURCES += $$newfile
-        }
-
-        export(SOURCES)
-    } else {
-        QMAKE_EXTRA_COMPILERS += $$1
-        generated_files.depends += compiler_$${1}_make_all
-        export(QMAKE_EXTRA_COMPILERS)
-        export(generated_files.depends)
-    }
-    return(true)
-}
-
-defineTest(addExtraCompilerWithHeader) {
-    addExtraCompiler($$1)
-
-    eval(headerFile = $${2})
-    isEmpty(headerFile) {
-        eval($${1}_header.output = $$eval($${1}.output))
-        eval($${1}_header.output ~= s/\.cpp/.h/)
-        eval($${1}_header.output ~= s/\.c/.h/)
-    } else {
-        eval($${1}_header.output = $$headerFile)
-    }
-
-    eval($${1}_header.input = $$eval($${1}.input))
-    eval($${1}_header.commands = @echo -n '')
-    eval($${1}_header.depends = compiler_$${1}_make_all)
-    eval($${1}_header.variable_out = GENERATED_FILES)
-
-    export($${1}_header.output)
-    export($${1}_header.input)
-    export($${1}_header.commands)
-    export($${1}_header.depends)
-    export($${1}_header.variable_out)
-
-    !CONFIG(QTDIR_build): QMAKE_EXTRA_COMPILERS += $${1}_header
-
-    export(QMAKE_EXTRA_COMPILERS)
-    export(generated_files.depends)
-    export(SOURCES)
-
-    return(true)
-}
+win32-msvc*: QMAKE_CXXFLAGS += -wd4291 -wd4344 -wd4396 -wd4503 -wd4800 -wd4819 -wd4996
 
diff --git a/src/corelib/io/qfileinfo.cpp b/src/corelib/io/qfileinfo.cpp
index 625098e..37591c5 100644
--- a/src/corelib/io/qfileinfo.cpp
+++ b/src/corelib/io/qfileinfo.cpp
@@ -41,7 +41,6 @@
 
 #include "qplatformdefs.h"
 #include "qfileinfo.h"
-#include "qfsfileengine_p.h"
 #include "qglobal.h"
 #include "qdir.h"
 #include "qfileinfo_p.h"
@@ -75,50 +74,6 @@ void QFileInfoPrivate::initFileEngine(const QString &file)
     data->fileName = file;
 }
 
-bool QFileInfoPrivate::hasAccess(Access access) const
-{
-    if (!(getFileFlags(QAbstractFileEngine::PermsMask
-                       | QAbstractFileEngine::LocalDiskFlag) & QAbstractFileEngine::LocalDiskFlag)) {
-        switch (access) {
-        case ReadAccess:
-            return getFileFlags(QAbstractFileEngine::ReadUserPerm);
-        case WriteAccess:
-            return getFileFlags(QAbstractFileEngine::WriteUserPerm);
-        case ExecuteAccess:
-            return getFileFlags(QAbstractFileEngine::ExeUserPerm);
-        default:
-            return false;
-        }
-    }
-
-    int mode = 0;
-    switch (access) {
-    case ReadAccess:
-        mode = R_OK;
-        break;
-    case WriteAccess:
-        mode = W_OK;
-        break;
-    case ExecuteAccess:
-        mode = X_OK;
-        break;
-    };
-#ifdef Q_OS_UNIX
-    return QT_ACCESS(QFile::encodeName(data->fileName).data(), mode) == 0;
-#endif
-#ifdef Q_OS_WIN
-    if ((access == ReadAccess && !getFileFlags(QAbstractFileEngine::ReadUserPerm))
-        || (access == WriteAccess && !getFileFlags(QAbstractFileEngine::WriteUserPerm))) {
-        return false;
-    }
-    if (access == ExecuteAccess)
-        return getFileFlags(QAbstractFileEngine::ExeUserPerm);
-
-    return ::_waccess((wchar_t*)QFSFileEnginePrivate::longFileName(data->fileName).utf16(), mode) == 0;
-#endif
-    return false;
-}
-
 void QFileInfoPrivate::detach()
 {
     qAtomicDetach(data);
@@ -893,7 +848,7 @@ bool QFileInfo::isReadable() const
     Q_D(const QFileInfo);
     if (!d->data->fileEngine)
         return false;
-    return d->hasAccess(QFileInfoPrivate::ReadAccess);
+    return d->getFileFlags(QAbstractFileEngine::ReadUserPerm);
 }
 
 /*!
@@ -906,7 +861,7 @@ bool QFileInfo::isWritable() const
     Q_D(const QFileInfo);
     if (!d->data->fileEngine)
         return false;
-    return d->hasAccess(QFileInfoPrivate::WriteAccess);
+    return d->getFileFlags(QAbstractFileEngine::WriteUserPerm);
 }
 
 /*!
@@ -919,7 +874,7 @@ bool QFileInfo::isExecutable() const
     Q_D(const QFileInfo);
     if (!d->data->fileEngine)
         return false;
-    return d->hasAccess(QFileInfoPrivate::ExecuteAccess);
+    return d->getFileFlags(QAbstractFileEngine::ExeUserPerm);
 }
 
 /*!
diff --git a/src/corelib/io/qfileinfo_p.h b/src/corelib/io/qfileinfo_p.h
index d97a0cf..306ffe1 100644
--- a/src/corelib/io/qfileinfo_p.h
+++ b/src/corelib/io/qfileinfo_p.h
@@ -68,13 +68,6 @@ public:
 
     void initFileEngine(const QString &);
 
-    enum Access {
-        ReadAccess,
-        WriteAccess,
-        ExecuteAccess
-    };
-    bool hasAccess(Access access) const;
-
     uint getFileFlags(QAbstractFileEngine::FileFlags) const;
     QDateTime &getFileTime(QAbstractFileEngine::FileTime) const;
     QString getFileName(QAbstractFileEngine::FileName) const;
diff --git a/src/corelib/io/qfsfileengine_p.h b/src/corelib/io/qfsfileengine_p.h
index 0f63eb8..d07c3a0 100644
--- a/src/corelib/io/qfsfileengine_p.h
+++ b/src/corelib/io/qfsfileengine_p.h
@@ -156,9 +156,7 @@ protected:
 
     void init();
 
-#if defined(Q_OS_WIN32) || defined(Q_OS_WINCE)
-    QAbstractFileEngine::FileFlags getPermissions() const;
-#endif
+    QAbstractFileEngine::FileFlags getPermissions(QAbstractFileEngine::FileFlags type) const;
 };
 
 QT_END_NAMESPACE
diff --git a/src/corelib/io/qfsfileengine_unix.cpp b/src/corelib/io/qfsfileengine_unix.cpp
index 1331f54..42ccc2d 100644
--- a/src/corelib/io/qfsfileengine_unix.cpp
+++ b/src/corelib/io/qfsfileengine_unix.cpp
@@ -737,6 +737,49 @@ static bool _q_isMacHidden(const QString &path)
 #endif
 
 /*!
+    \internal
+*/
+QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions(QAbstractFileEngine::FileFlags type) const
+{
+    QAbstractFileEngine::FileFlags ret = 0;
+
+    if (st.st_mode & S_IRUSR)
+        ret |= QAbstractFileEngine::ReadOwnerPerm;
+    if (st.st_mode & S_IWUSR)
+        ret |= QAbstractFileEngine::WriteOwnerPerm;
+    if (st.st_mode & S_IXUSR)
+        ret |= QAbstractFileEngine::ExeOwnerPerm;
+    if (st.st_mode & S_IRGRP)
+        ret |= QAbstractFileEngine::ReadGroupPerm;
+    if (st.st_mode & S_IWGRP)
+        ret |= QAbstractFileEngine::WriteGroupPerm;
+    if (st.st_mode & S_IXGRP)
+        ret |= QAbstractFileEngine::ExeGroupPerm;
+    if (st.st_mode & S_IROTH)
+        ret |= QAbstractFileEngine::ReadOtherPerm;
+    if (st.st_mode & S_IWOTH)
+        ret |= QAbstractFileEngine::WriteOtherPerm;
+    if (st.st_mode & S_IXOTH)
+        ret |= QAbstractFileEngine::ExeOtherPerm;
+
+    // calculate user permissions
+    if (type & QAbstractFileEngine::ReadUserPerm) {
+        if (QT_ACCESS(nativeFilePath.constData(), R_OK) == 0)
+            ret |= QAbstractFileEngine::ReadUserPerm;
+    }
+    if (type & QAbstractFileEngine::WriteUserPerm) {
+        if (QT_ACCESS(nativeFilePath.constData(), W_OK) == 0)
+            ret |= QAbstractFileEngine::WriteUserPerm;
+    }
+    if (type & QAbstractFileEngine::ExeUserPerm) {
+        if (QT_ACCESS(nativeFilePath.constData(), X_OK) == 0)
+            ret |= QAbstractFileEngine::ExeUserPerm;
+    }
+
+    return ret;
+}
+
+/*!
     \reimp
 */
 QAbstractFileEngine::FileFlags QFSFileEngine::fileFlags(FileFlags type) const
@@ -755,32 +798,8 @@ QAbstractFileEngine::FileFlags QFSFileEngine::fileFlags(FileFlags type) const
     if (!exists && !d->isSymlink())
         return ret;
 
-    if (exists && (type & PermsMask)) {
-        if (d->st.st_mode & S_IRUSR)
-            ret |= ReadOwnerPerm;
-        if (d->st.st_mode & S_IWUSR)
-            ret |= WriteOwnerPerm;
-        if (d->st.st_mode & S_IXUSR)
-            ret |= ExeOwnerPerm;
-        if (d->st.st_mode & S_IRUSR)
-            ret |= ReadUserPerm;
-        if (d->st.st_mode & S_IWUSR)
-            ret |= WriteUserPerm;
-        if (d->st.st_mode & S_IXUSR)
-            ret |= ExeUserPerm;
-        if (d->st.st_mode & S_IRGRP)
-            ret |= ReadGroupPerm;
-        if (d->st.st_mode & S_IWGRP)
-            ret |= WriteGroupPerm;
-        if (d->st.st_mode & S_IXGRP)
-            ret |= ExeGroupPerm;
-        if (d->st.st_mode & S_IROTH)
-            ret |= ReadOtherPerm;
-        if (d->st.st_mode & S_IWOTH)
-            ret |= WriteOtherPerm;
-        if (d->st.st_mode & S_IXOTH)
-            ret |= ExeOtherPerm;
-    }
+    if (exists && (type & PermsMask))
+        ret |= d->getPermissions(type);
     if (type & TypesMask) {
 #if !defined(QWS) && defined(Q_OS_MAC)
         bool foundAlias = false;
diff --git a/src/corelib/io/qfsfileengine_win.cpp b/src/corelib/io/qfsfileengine_win.cpp
index d8b1c03..761b847 100644
--- a/src/corelib/io/qfsfileengine_win.cpp
+++ b/src/corelib/io/qfsfileengine_win.cpp
@@ -1408,7 +1408,7 @@ bool QFSFileEngine::link(const QString &newName)
 /*!
     \internal
 */
-QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions() const
+QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions(QAbstractFileEngine::FileFlags type) const
 {
     QAbstractFileEngine::FileFlags ret = 0;
 
@@ -1429,7 +1429,7 @@ QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions() const
             if(res == ERROR_SUCCESS) {
                 ACCESS_MASK access_mask;
                 TRUSTEE_W trustee;
-                { //user
+                if (type & 0x0700) { // user
                     if(ptrGetEffectiveRightsFromAclW(pDacl, &currentUserTrusteeW, &access_mask) != ERROR_SUCCESS)
                         access_mask = (ACCESS_MASK)-1;
                     if(access_mask & ReadMask)
@@ -1439,7 +1439,7 @@ QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions() const
                     if(access_mask & ExecMask)
                         ret |= QAbstractFileEngine::ExeUserPerm;
                 }
-                { //owner
+                if (type & 0x7000) { // owner
                     ptrBuildTrusteeWithSidW(&trustee, pOwner);
                     if(ptrGetEffectiveRightsFromAclW(pDacl, &trustee, &access_mask) != ERROR_SUCCESS)
                         access_mask = (ACCESS_MASK)-1;
@@ -1450,7 +1450,7 @@ QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions() const
                     if(access_mask & ExecMask)
                         ret |= QAbstractFileEngine::ExeOwnerPerm;
                 }
-                { //group
+                if (type & 0x0070) { // group
                     ptrBuildTrusteeWithSidW(&trustee, pGroup);
                     if(ptrGetEffectiveRightsFromAclW(pDacl, &trustee, &access_mask) != ERROR_SUCCESS)
                         access_mask = (ACCESS_MASK)-1;
@@ -1461,7 +1461,7 @@ QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions() const
                     if(access_mask & ExecMask)
                         ret |= QAbstractFileEngine::ExeGroupPerm;
                 }
-                { //other (world)
+                if (type & 0x0007) { // other (world)
                     if(ptrGetEffectiveRightsFromAclW(pDacl, &worldTrusteeW, &access_mask) != ERROR_SUCCESS)
                         access_mask = (ACCESS_MASK)-1; // ###
                     if(access_mask & ReadMask)
@@ -1480,25 +1480,35 @@ QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions() const
         //### what to do with permissions if we don't use NTFS
         // for now just add all permissions and what about exe missions ??
         // also qt_ntfs_permission_lookup is now not set by default ... should it ?
-        ret |= QAbstractFileEngine::ReadOtherPerm | QAbstractFileEngine::ReadGroupPerm
-            | QAbstractFileEngine::ReadOwnerPerm | QAbstractFileEngine::ReadUserPerm
-            | QAbstractFileEngine::WriteUserPerm | QAbstractFileEngine::WriteOwnerPerm
-            | QAbstractFileEngine::WriteGroupPerm | QAbstractFileEngine::WriteOtherPerm;
-
-        if (doStat()) {
-            if (ret & (QAbstractFileEngine::WriteOwnerPerm | QAbstractFileEngine::WriteUserPerm |
-                QAbstractFileEngine::WriteGroupPerm | QAbstractFileEngine::WriteOtherPerm)) {
-                if (fileAttrib & FILE_ATTRIBUTE_READONLY)
-                    ret &= ~(QAbstractFileEngine::WriteOwnerPerm | QAbstractFileEngine::WriteUserPerm |
-                             QAbstractFileEngine::WriteGroupPerm | QAbstractFileEngine::WriteOtherPerm);
-            }
+        ret |= QAbstractFileEngine::ReadOwnerPerm | QAbstractFileEngine::ReadGroupPerm
+             | QAbstractFileEngine::ReadOtherPerm;
 
-            QString fname = filePath.endsWith(QLatin1String(".lnk")) ? readLink(filePath) : filePath;
-            QString ext = fname.right(4).toLower();
-            if (ext == QLatin1String(".exe") || ext == QLatin1String(".com") || ext == QLatin1String(".bat") ||
-                ext == QLatin1String(".pif") || ext == QLatin1String(".cmd") || (fileAttrib & FILE_ATTRIBUTE_DIRECTORY))
-                ret |= QAbstractFileEngine::ExeOwnerPerm | QAbstractFileEngine::ExeGroupPerm |
-                       QAbstractFileEngine::ExeOtherPerm | QAbstractFileEngine::ExeUserPerm;
+        if (!(fileAttrib & FILE_ATTRIBUTE_READONLY)) {
+            ret |= QAbstractFileEngine::WriteOwnerPerm | QAbstractFileEngine::WriteGroupPerm
+                 | QAbstractFileEngine::WriteOtherPerm;
+        }
+
+        QString fname = filePath.endsWith(QLatin1String(".lnk")) ? readLink(filePath) : filePath;
+        QString ext = fname.right(4).toLower();
+        if ((fileAttrib & FILE_ATTRIBUTE_DIRECTORY) ||
+            ext == QLatin1String(".exe") || ext == QLatin1String(".com") || ext == QLatin1String(".bat") ||
+            ext == QLatin1String(".pif") || ext == QLatin1String(".cmd")) {
+            ret |= QAbstractFileEngine::ExeOwnerPerm | QAbstractFileEngine::ExeGroupPerm
+                 | QAbstractFileEngine::ExeOtherPerm;
+        }
+
+        // calculate user permissions
+        if (type & QAbstractFileEngine::ReadUserPerm) {
+            if (::_waccess((wchar_t*)longFileName(filePath).utf16(), R_OK) == 0)
+                ret |= QAbstractFileEngine::ReadUserPerm;
+        }
+        if (type & QAbstractFileEngine::WriteUserPerm) {
+            if (::_waccess((wchar_t*)longFileName(filePath).utf16(), W_OK) == 0)
+                ret |= QAbstractFileEngine::WriteUserPerm;
+        }
+        if (type & QAbstractFileEngine::ExeUserPerm) {
+            if (::_waccess((wchar_t*)longFileName(filePath).utf16(), X_OK) == 0)
+                ret |= QAbstractFileEngine::ExeUserPerm;
         }
     }
     return ret;
@@ -1555,13 +1565,10 @@ QAbstractFileEngine::FileFlags QFSFileEngine::fileFlags(QAbstractFileEngine::Fil
     }
 
     if (type & PermsMask) {
-        ret |= d->getPermissions();
-        // ### Workaround pascals ### above. Since we always set all properties to true
-        // we need to disable read and exec access if the file does not exists
-        if (d->doStat())
+        if (d->doStat()) {
             ret |= ExistsFlag;
-        else
-            ret &= 0x2222;
+            ret |= d->getPermissions(type);
+        }
     }
     if (type & TypesMask) {
         if (d->filePath.endsWith(QLatin1String(".lnk"))) {
diff --git a/src/declarative/util/qdeclarativelistmodel.cpp b/src/declarative/util/qdeclarativelistmodel.cpp
index e3f26d7..b968ca5 100644
--- a/src/declarative/util/qdeclarativelistmodel.cpp
+++ b/src/declarative/util/qdeclarativelistmodel.cpp
@@ -284,12 +284,11 @@ void ModelNode::setObjectValue(const QScriptValue& valuemap) {
 }
 
 void ModelNode::setListValue(const QScriptValue& valuelist) {
-    QScriptValueIterator it(valuelist);
+    int size = valuelist.property(QString::fromLatin1("length")).toInt32();
     values.clear();
-    while (it.hasNext()) {
-        it.next();
+    for (int i = 0; i < size; ++i) {
         ModelNode *value = new ModelNode;
-        QScriptValue v = it.value();
+        QScriptValue v = valuelist.property(i);
         if (v.isArray()) {
             value->isArray = true;
             value->setListValue(v);
diff --git a/src/gui/dialogs/qfileinfogatherer.cpp b/src/gui/dialogs/qfileinfogatherer.cpp
index c75cdfd..3b08bf6 100644
--- a/src/gui/dialogs/qfileinfogatherer.cpp
+++ b/src/gui/dialogs/qfileinfogatherer.cpp
@@ -216,41 +216,10 @@ void QFileInfoGatherer::run()
     }
 }
 
-/*
-    QFileInfo::permissions is different depending upon your platform.
-
-    "normalize this" so they can mean the same to us.
-*/
-QFile::Permissions QFileInfoGatherer::translatePermissions(const QFileInfo &fileInfo) const {
-    QFile::Permissions permissions = fileInfo.permissions();
-#ifdef Q_OS_WIN
-    return permissions;
-#else
-    QFile::Permissions p = permissions;
-    p &= ~(QFile::ReadUser|QFile::WriteUser|QFile::ExeUser);
-    if (                                     permissions & QFile::ReadOther
-        || (fileInfo.ownerId() == userId  && permissions & QFile::ReadOwner)
-        || (fileInfo.groupId() == groupId && permissions & QFile::ReadGroup))
-        p |= QFile::ReadUser;
-
-    if (                                     permissions & QFile::WriteOther
-        || (fileInfo.ownerId() == userId  && permissions & QFile::WriteOwner)
-        || (fileInfo.groupId() == groupId && permissions & QFile::WriteGroup))
-        p |= QFile::WriteUser;
-
-    if (                                     permissions & QFile::ExeOther
-        || (fileInfo.ownerId() == userId  && permissions & QFile::ExeOwner)
-        || (fileInfo.groupId() == groupId && permissions & QFile::ExeGroup))
-        p |= QFile::ExeUser;
-    return p;
-#endif
-}
-
 QExtendedInformation QFileInfoGatherer::getInfo(const QFileInfo &fileInfo) const
 {
     QExtendedInformation info(fileInfo);
     info.icon = m_iconProvider->icon(fileInfo);
-    info.setPermissions(translatePermissions(fileInfo));
     info.displayType = m_iconProvider->type(fileInfo);
 #ifndef QT_NO_FILESYSTEMWATCHER
     // ### Not ready to listen all modifications
diff --git a/src/gui/dialogs/qfileinfogatherer_p.h b/src/gui/dialogs/qfileinfogatherer_p.h
index b8b58a2..eff6b3c 100644
--- a/src/gui/dialogs/qfileinfogatherer_p.h
+++ b/src/gui/dialogs/qfileinfogatherer_p.h
@@ -88,11 +88,7 @@ public:
         return fe.caseSensitive();
     }
     QFile::Permissions permissions() const {
-        return mPermissions;
-    }
-
-    void setPermissions (QFile::Permissions permissions) {
-        mPermissions = permissions;
+        return mFileInfo.permissions();
     }
 
     Type type() const {
@@ -140,7 +136,6 @@ public:
 
 private :
     QFileInfo mFileInfo;
-    QFile::Permissions mPermissions;
 };
 
 class QFileIconProvider;
@@ -181,7 +176,6 @@ protected:
 private:
     void fetch(const QFileInfo &info, QTime &base, bool &firstTime, QList<QPair<QString, QFileInfo> > &updatedFiles, const QString &path);
     QString translateDriveName(const QFileInfo &drive) const;
-    QFile::Permissions translatePermissions(const QFileInfo &fileInfo) const;
 
     QMutex mutex;
     QWaitCondition condition;
diff --git a/src/gui/text/qzip.cpp b/src/gui/text/qzip.cpp
index d30c996..6f099a9 100644
--- a/src/gui/text/qzip.cpp
+++ b/src/gui/text/qzip.cpp
@@ -280,6 +280,21 @@ static QFile::Permissions modeToPermissions(quint32 mode)
     return ret;
 }
 
+static QDateTime readMSDosDate(const uchar *src)
+{
+    uint dosDate = readUInt(src);
+    quint64 uDate;
+    uDate = (quint64)(dosDate >> 16);
+    uint tm_mday = (uDate & 0x1f);
+    uint tm_mon =  ((uDate & 0x1E0) >> 5);
+    uint tm_year = (((uDate & 0x0FE00) >> 9) + 1980);
+    uint tm_hour = ((dosDate & 0xF800) >> 11);
+    uint tm_min =  ((dosDate & 0x7E0) >> 5);
+    uint tm_sec =  ((dosDate & 0x1f) << 1);
+
+    return QDateTime(QDate(tm_year, tm_mon, tm_mday), QTime(tm_hour, tm_min, tm_sec));
+}
+
 struct LocalFileHeader
 {
     uchar signature[4]; //  0x04034b50
@@ -343,7 +358,7 @@ struct FileHeader
 };
 
 QZipReader::FileInfo::FileInfo()
-    : isDir(false), isFile(true), isSymLink(false), crc32(0), size(0)
+    : isDir(false), isFile(false), isSymLink(false), crc32(0), size(0)
 {
 }
 
@@ -365,9 +380,15 @@ QZipReader::FileInfo& QZipReader::FileInfo::operator=(const FileInfo &other)
     permissions = other.permissions;
     crc32 = other.crc32;
     size = other.size;
+    lastModified = other.lastModified;
     return *this;
 }
 
+bool QZipReader::FileInfo::isValid() const
+{
+    return isDir || isFile || isSymLink;
+}
+
 class QZipPrivate
 {
 public:
@@ -403,6 +424,7 @@ void QZipPrivate::fillFileInfo(int index, QZipReader::FileInfo &fileInfo) const
     fileInfo.permissions = modeToPermissions(mode);
     fileInfo.crc32 = readUInt(header.h.crc_32);
     fileInfo.size = readUInt(header.h.uncompressed_size);
+    fileInfo.lastModified = readMSDosDate(header.h.last_mod_file);
 }
 
 class QZipReaderPrivate : public QZipPrivate
@@ -750,6 +772,14 @@ QZipReader::~QZipReader()
 }
 
 /*!
+    Returns device used for reading zip archive.
+*/
+QIODevice* QZipReader::device() const
+{
+    return d->device;
+}
+
+/*!
     Returns true if the user can read the file; otherwise returns false.
 */
 bool QZipReader::isReadable() const
@@ -796,6 +826,7 @@ int QZipReader::count() const
 /*!
     Returns a FileInfo of an entry in the zipfile.
     The \a index is the index into the directoy listing of the zipfile.
+    Returns an invalid FileInfo if \a index is out of boundaries.
 
     \sa fileInfoList()
 */
@@ -803,7 +834,8 @@ QZipReader::FileInfo QZipReader::entryInfoAt(int index) const
 {
     d->scanFiles();
     QZipReader::FileInfo fi;
-    d->fillFileInfo(index, fi);
+    if (index >= 0 && index < d->fileHeaders.count())
+        d->fillFileInfo(index, fi);
     return fi;
 }
 
@@ -1022,6 +1054,14 @@ QZipWriter::~QZipWriter()
 }
 
 /*!
+    Returns device used for writing zip archive.
+*/
+QIODevice* QZipWriter::device() const
+{
+    return d->device;
+}
+
+/*!
     Returns true if the user can write to the archive; otherwise returns false.
 */
 bool QZipWriter::isWritable() const
diff --git a/src/gui/text/qzipreader_p.h b/src/gui/text/qzipreader_p.h
index 9b73373..6466a7b 100644
--- a/src/gui/text/qzipreader_p.h
+++ b/src/gui/text/qzipreader_p.h
@@ -55,6 +55,7 @@
 // We mean it.
 //
 
+#include <QtCore/qdatetime.h>
 #include <QtCore/qfile.h>
 #include <QtCore/qstring.h>
 
@@ -70,6 +71,8 @@ public:
     explicit QZipReader(QIODevice *device);
     ~QZipReader();
 
+    QIODevice* device() const;
+
     bool isReadable() const;
     bool exists() const;
 
@@ -79,6 +82,7 @@ public:
         FileInfo(const FileInfo &other);
         ~FileInfo();
         FileInfo &operator=(const FileInfo &other);
+        bool isValid() const;
         QString filePath;
         uint isDir : 1;
         uint isFile : 1;
@@ -86,6 +90,7 @@ public:
         QFile::Permissions permissions;
         uint crc32;
         qint64 size;
+        QDateTime lastModified;
         void *d;
     };
 
diff --git a/src/gui/text/qzipwriter_p.h b/src/gui/text/qzipwriter_p.h
index 9322f4a..a50c172 100644
--- a/src/gui/text/qzipwriter_p.h
+++ b/src/gui/text/qzipwriter_p.h
@@ -69,6 +69,8 @@ public:
     explicit QZipWriter(QIODevice *device);
     ~QZipWriter();
 
+    QIODevice* device() const;
+
     bool isWritable() const;
     bool exists() const;
 
diff --git a/src/script/api/qscriptcontextinfo.cpp b/src/script/api/qscriptcontextinfo.cpp
index cc5fcc1..ebb1770 100644
--- a/src/script/api/qscriptcontextinfo.cpp
+++ b/src/script/api/qscriptcontextinfo.cpp
@@ -181,7 +181,7 @@ QScriptContextInfoPrivate::QScriptContextInfoPrivate(const QScriptContext *conte
     // Get the others informations:
     JSC::JSObject *callee = frame->callee();
     if (callee && callee->inherits(&JSC::InternalFunction::info))
-        functionName = JSC::asInternalFunction(callee)->name(&frame->globalData());
+        functionName = JSC::asInternalFunction(callee)->name(frame);
     if (callee && callee->inherits(&JSC::JSFunction::info)) {
         functionType = QScriptContextInfo::ScriptFunction;
         JSC::FunctionExecutable *body = JSC::asFunction(callee)->jsExecutable();
diff --git a/src/script/api/qscriptengine.cpp b/src/script/api/qscriptengine.cpp
index 024b4d0..bef7a3e 100644
--- a/src/script/api/qscriptengine.cpp
+++ b/src/script/api/qscriptengine.cpp
@@ -898,6 +898,8 @@ QScriptEnginePrivate::QScriptEnginePrivate()
 
 QScriptEnginePrivate::~QScriptEnginePrivate()
 {
+    JSC::setCurrentIdentifierTable(globalData->identifierTable);
+
     //disconnect all loadedScripts and generate all jsc::debugger::scriptUnload events
     QHash<intptr_t,QScript::UStringSourceProviderWithFeedback*>::const_iterator it;
     for (it = loadedScripts.constBegin(); it != loadedScripts.constEnd(); ++it)
@@ -988,8 +990,7 @@ JSC::JSValue QScriptEnginePrivate::objectFromVariantMap(JSC::ExecState *exec, co
 QVariantMap QScriptEnginePrivate::variantMapFromObject(JSC::ExecState *exec, JSC::JSValue obj)
 {
     JSC::PropertyNameArray propertyNames(exec);
-    propertyNames.setShouldCache(false);
-    JSC::asObject(obj)->getOwnPropertyNames(exec, propertyNames, /*includeNonEnumerable=*/true);
+    JSC::asObject(obj)->getOwnPropertyNames(exec, propertyNames, JSC::IncludeDontEnumProperties);
     QVariantMap vmap;
     JSC::PropertyNameArray::const_iterator it = propertyNames.begin();
     for( ; it != propertyNames.end(); ++it)
@@ -1187,7 +1188,8 @@ bool QScriptEnginePrivate::isCollecting() const
 void QScriptEnginePrivate::collectGarbage()
 {
     JSC::JSLock lock(false);
-    globalData->heap.collect();
+    QScript::APIShim shim(this);
+    globalData->heap.collectAllGarbage();
 }
 
 QScript::TimeoutCheckerProxy *QScriptEnginePrivate::timeoutChecker() const
@@ -1218,7 +1220,7 @@ JSC::JSValue QScriptEnginePrivate::evaluateHelper(JSC::ExecState *exec, intptr_t
         debugger->evaluateStart(sourceId);
 
     q->clearExceptions();
-    JSC::DynamicGlobalObjectScope dynamicGlobalObjectScope(exec, exec->scopeChain()->globalObject());
+    JSC::DynamicGlobalObjectScope dynamicGlobalObjectScope(exec, exec->scopeChain()->globalObject);
 
     if (compile) {
         JSC::JSObject* error = executable->compile(exec, exec->scopeChain());
@@ -1670,15 +1672,15 @@ void QScriptEnginePrivate::setProperty(JSC::ExecState *exec, JSC::JSValue object
             // deleting getter/setter
             if ((flags & QScriptValue::PropertyGetter) && (flags & QScriptValue::PropertySetter)) {
                 // deleting both: just delete the property
-                thisObject->deleteProperty(exec, id, /*checkDontDelete=*/false);
+                thisObject->deleteProperty(exec, id);
             } else if (flags & QScriptValue::PropertyGetter) {
                 // preserve setter, if there is one
-                thisObject->deleteProperty(exec, id, /*checkDontDelete=*/false);
+                thisObject->deleteProperty(exec, id);
                 if (setter && setter.isObject())
                     thisObject->defineSetter(exec, id, JSC::asObject(setter));
             } else { // flags & QScriptValue::PropertySetter
                 // preserve getter, if there is one
-                thisObject->deleteProperty(exec, id, /*checkDontDelete=*/false);
+                thisObject->deleteProperty(exec, id);
                 if (getter && getter.isObject())
                     thisObject->defineGetter(exec, id, JSC::asObject(getter));
             }
@@ -1708,10 +1710,10 @@ void QScriptEnginePrivate::setProperty(JSC::ExecState *exec, JSC::JSValue object
         }
         if (!value) {
             // ### check if it's a getter/setter property
-            thisObject->deleteProperty(exec, id, /*checkDontDelete=*/false);
+            thisObject->deleteProperty(exec, id);
         } else if (flags != QScriptValue::KeepExistingFlags) {
             if (thisObject->hasOwnProperty(exec, id))
-                thisObject->deleteProperty(exec, id, /*checkDontDelete=*/false); // ### hmmm - can't we just update the attributes?
+                thisObject->deleteProperty(exec, id); // ### hmmm - can't we just update the attributes?
             unsigned attribs = 0;
             if (flags & QScriptValue::ReadOnly)
                 attribs |= JSC::ReadOnly;
@@ -1732,7 +1734,7 @@ void QScriptEnginePrivate::setProperty(JSC::ExecState *exec, JSC::JSValue object
                                        JSC::JSValue value, const QScriptValue::PropertyFlags &flags)
 {
     if (!value) {
-        JSC::asObject(objectValue)->deleteProperty(exec, index, /*checkDontDelete=*/false);
+        JSC::asObject(objectValue)->deleteProperty(exec, index);
     } else {
         if ((flags & QScriptValue::PropertyGetter) || (flags & QScriptValue::PropertySetter)) {
             // fall back to string-based setProperty(), since there is no
@@ -1766,7 +1768,7 @@ QScriptValue::PropertyFlags QScriptEnginePrivate::propertyFlags(JSC::ExecState *
     JSC::PropertyDescriptor descriptor;
     if (object->getOwnPropertyDescriptor(exec, id, descriptor))
         attribs = descriptor.attributes();
-    else if (!object->getPropertyAttributes(exec, id, attribs)) {
+    else {
         if ((mode & QScriptValue::ResolvePrototype) && object->prototype() && object->prototype().isObject()) {
             JSC::JSValue proto = object->prototype();
             return propertyFlags(exec, proto, id, mode);
@@ -1793,6 +1795,15 @@ QScriptValue::PropertyFlags QScriptEnginePrivate::propertyFlags(JSC::ExecState *
     return result;
 }
 
+QScriptString QScriptEnginePrivate::toStringHandle(const JSC::Identifier &name)
+{
+    QScriptString result;
+    QScriptStringPrivate *p = new QScriptStringPrivate(this, name, QScriptStringPrivate::HeapAllocated);
+    QScriptStringPrivate::init(result, p);
+    registerScriptString(p);
+    return result;
+}
+
 #ifdef QT_NO_QOBJECT
 
 QScriptEngine::QScriptEngine()
@@ -2466,15 +2477,16 @@ QScriptSyntaxCheckResult QScriptEnginePrivate::checkSyntax(const QString &progra
 QScriptValue QScriptEngine::evaluate(const QString &program, const QString &fileName, int lineNumber)
 {
     Q_D(QScriptEngine);
+    QScript::APIShim shim(d);
     WTF::PassRefPtr<QScript::UStringSourceProviderWithFeedback> provider
             = QScript::UStringSourceProviderWithFeedback::create(program, fileName, lineNumber, d);
     intptr_t sourceId = provider->asID();
     JSC::SourceCode source(provider, lineNumber); //after construction of SourceCode provider variable will be null.
 
     JSC::ExecState* exec = d->currentFrame;
-    JSC::EvalExecutable executable(exec, source);
+    WTF::RefPtr<JSC::EvalExecutable> executable = JSC::EvalExecutable::create(exec, source);
     bool compile = true;
-    return d->scriptValueFromJSCValue(d->evaluateHelper(exec, sourceId, &executable, compile));
+    return d->scriptValueFromJSCValue(d->evaluateHelper(exec, sourceId, executable.get(), compile));
 }
 
 /*!
@@ -2491,6 +2503,7 @@ QScriptValue QScriptEngine::evaluate(const QScriptProgram &program)
     if (!program_d)
         return QScriptValue();
 
+    QScript::APIShim shim(d);
     JSC::ExecState* exec = d->currentFrame;
     JSC::EvalExecutable *executable = program_d->executable(exec, d);
     bool compile = !program_d->isCompiled;
@@ -2603,7 +2616,7 @@ JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSV
             newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
         } else {
             JSC::JSObject *jscObject = originalGlobalObject();
-            JSC::ScopeChainNode *scn = new JSC::ScopeChainNode(0, jscObject, &exec->globalData(), jscObject);
+            JSC::ScopeChainNode *scn = new JSC::ScopeChainNode(0, jscObject, &exec->globalData(), exec->lexicalGlobalObject(), jscObject);
             newCallFrame->init(0, /*vPC=*/0, scn, exec, flags | ShouldRestoreCallFrame, argc, callee);
         }
     } else {
@@ -2935,7 +2948,7 @@ JSC::JSValue QScriptEnginePrivate::create(JSC::ExecState *exec, int type, const
         }
     }
     if (result && result.isObject() && info && info->prototype
-        && JSC::JSValue::strictEqual(JSC::asObject(result)->prototype(), eng->originalGlobalObject()->objectPrototype())) {
+        && JSC::JSValue::strictEqual(exec, JSC::asObject(result)->prototype(), eng->originalGlobalObject()->objectPrototype())) {
         JSC::asObject(result)->setPrototype(info->prototype);
     }
     return result;
@@ -4050,11 +4063,7 @@ QScriptEngineAgent *QScriptEngine::agent() const
 QScriptString QScriptEngine::toStringHandle(const QString &str)
 {
     Q_D(QScriptEngine);
-    QScriptString result;
-    QScriptStringPrivate *p = new QScriptStringPrivate(d, JSC::Identifier(d->currentFrame, str), QScriptStringPrivate::HeapAllocated);
-    QScriptStringPrivate::init(result, p);
-    d->registerScriptString(p);
-    return result;
+    return d->toStringHandle(JSC::Identifier(d->currentFrame, str));
 }
 
 /*!
diff --git a/src/script/api/qscriptengine_p.h b/src/script/api/qscriptengine_p.h
index 5166d89..47e5d8a 100644
--- a/src/script/api/qscriptengine_p.h
+++ b/src/script/api/qscriptengine_p.h
@@ -279,6 +279,7 @@ public:
     inline void registerScriptString(QScriptStringPrivate *value);
     inline void unregisterScriptString(QScriptStringPrivate *value);
     void detachAllRegisteredScriptStrings();
+    QScriptString toStringHandle(const JSC::Identifier &name);
 
     static inline JSC::JSValue newArray(JSC::ExecState *, uint length);
     static inline JSC::JSValue newDate(JSC::ExecState *, qsreal value);
@@ -383,6 +384,23 @@ public:
 namespace QScript
 {
 
+class APIShim
+{
+public:
+    APIShim(QScriptEnginePrivate *engine)
+        : m_engine(engine), m_oldTable(JSC::setCurrentIdentifierTable(engine->globalData->identifierTable))
+    {
+    }
+    ~APIShim()
+    {
+        JSC::setCurrentIdentifierTable(m_oldTable);
+    }
+
+private:
+    QScriptEnginePrivate *m_engine;
+    JSC::IdentifierTable *m_oldTable;
+};
+
 /*Helper class. Main purpose is to give debugger feedback about unloading and loading scripts.
   It keeps pointer to JSGlobalObject assuming that it is always the same - there is no way to update
   this data. Class is internal and used as an implementation detail in and only in QScriptEngine::evaluate.*/
@@ -685,17 +703,17 @@ inline void QScriptEnginePrivate::setProperty(JSC::ExecState *exec, JSC::JSValue
     setProperty(exec, objectValue, JSC::Identifier(exec, name), value, flags);
 }
 
-inline JSC::JSValue QScriptValuePrivate::property(const JSC::Identifier &id, int resolveMode) const
+inline JSC::JSValue QScriptValuePrivate::property(const JSC::Identifier &id, const QScriptValue::ResolveFlags &resolveMode) const
 {
     return QScriptEnginePrivate::property(engine->currentFrame, jscValue, id, resolveMode);
 }
 
-inline JSC::JSValue QScriptValuePrivate::property(quint32 index, int resolveMode) const
+inline JSC::JSValue QScriptValuePrivate::property(quint32 index, const QScriptValue::ResolveFlags &resolveMode) const
 {
     return QScriptEnginePrivate::property(engine->currentFrame, jscValue, index, resolveMode);
 }
 
-inline JSC::JSValue QScriptValuePrivate::property(const JSC::UString &name, int resolveMode) const
+inline JSC::JSValue QScriptValuePrivate::property(const JSC::UString &name, const QScriptValue::ResolveFlags &resolveMode) const
 {
     JSC::ExecState *exec = engine->currentFrame;
     return QScriptEnginePrivate::property(exec, jscValue, JSC::Identifier(exec, name), resolveMode);
@@ -779,6 +797,7 @@ inline void QScriptEnginePrivate::unregisterScriptString(QScriptStringPrivate *v
         registeredScriptStrings = value->next;
     value->prev = 0;
     value->next = 0;
+    JSC::setCurrentIdentifierTable(globalData->identifierTable);
 }
 
 inline QScriptContext *QScriptEnginePrivate::contextForFrame(JSC::ExecState *frame)
diff --git a/src/script/api/qscriptengineagent.cpp b/src/script/api/qscriptengineagent.cpp
index 3bd97eb..28905e8 100644
--- a/src/script/api/qscriptengineagent.cpp
+++ b/src/script/api/qscriptengineagent.cpp
@@ -151,14 +151,15 @@ void QScriptEngineAgentPrivate::exceptionCatch(const JSC::DebuggerCallFrame& fra
     engine->clearCurrentException();
 }
 
-void QScriptEngineAgentPrivate::atStatement(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno, int column)
+void QScriptEngineAgentPrivate::atStatement(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno/*, int column*/)
 {
     QScript::UStringSourceProviderWithFeedback *source = engine->loadedScripts.value(sourceID);
     if (!source) {
         // QTBUG-6108: We don't have the source for this script, so ignore.
         return;
     }
-    column = source->columnNumberFromOffset(column);
+//    column = source->columnNumberFromOffset(column);
+    int column = 1;
     JSC::CallFrame *oldFrame = engine->currentFrame;
     int oldAgentLineNumber = engine->agentLineNumber;
     engine->currentFrame = frame.callFrame();
@@ -182,7 +183,7 @@ void QScriptEngineAgentPrivate::evaluateStop(const JSC::JSValue& returnValue, in
 }
 
 void QScriptEngineAgentPrivate::didReachBreakpoint(const JSC::DebuggerCallFrame& frame,
-                                                   intptr_t sourceID, int lineno, int column)
+                                                   intptr_t sourceID, int lineno/*, int column*/)
 {
     if (q_ptr->supportsExtension(QScriptEngineAgent::DebuggerInvocationRequest)) {
         QScript::UStringSourceProviderWithFeedback *source = engine->loadedScripts.value(sourceID);
@@ -190,7 +191,8 @@ void QScriptEngineAgentPrivate::didReachBreakpoint(const JSC::DebuggerCallFrame&
             // QTBUG-6108: We don't have the source for this script, so ignore.
             return;
         }
-        column = source->columnNumberFromOffset(column);
+//        column = source->columnNumberFromOffset(column);
+        int column = 1;
         JSC::CallFrame *oldFrame = engine->currentFrame;
         int oldAgentLineNumber = engine->agentLineNumber;
         engine->currentFrame = frame.callFrame();
diff --git a/src/script/api/qscriptengineagent_p.h b/src/script/api/qscriptengineagent_p.h
index 8354143..fd10e68 100644
--- a/src/script/api/qscriptengineagent_p.h
+++ b/src/script/api/qscriptengineagent_p.h
@@ -75,17 +75,18 @@ public:
     };
 
     //exceptions
-    virtual void exception(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno)
+    virtual void exception(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno, bool hasHandler)
     {
         Q_UNUSED(frame);
         Q_UNUSED(sourceID);
         Q_UNUSED(lineno);
+        Q_UNUSED(hasHandler);
     };
     virtual void exceptionThrow(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, bool hasHandler);
     virtual void exceptionCatch(const JSC::DebuggerCallFrame& frame, intptr_t sourceID);
 
     //statements
-    virtual void atStatement(const JSC::DebuggerCallFrame&, intptr_t sourceID, int lineno, int column);
+    virtual void atStatement(const JSC::DebuggerCallFrame&, intptr_t sourceID, int lineno/*, int column*/);
     virtual void callEvent(const JSC::DebuggerCallFrame&, intptr_t sourceID, int lineno)
     {
         Q_UNUSED(lineno);
@@ -107,7 +108,7 @@ public:
     };
     virtual void functionExit(const JSC::JSValue& returnValue, intptr_t sourceID);
     //others
-    virtual void didReachBreakpoint(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno, int column);
+    virtual void didReachBreakpoint(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno/*, int column*/);
 
     virtual void evaluateStart(intptr_t sourceID)
     {
diff --git a/src/script/api/qscriptvalue.cpp b/src/script/api/qscriptvalue.cpp
index 414a45c..458bab8 100644
--- a/src/script/api/qscriptvalue.cpp
+++ b/src/script/api/qscriptvalue.cpp
@@ -898,18 +898,21 @@ bool QScriptValue::strictlyEquals(const QScriptValue &other) const
         if (d->type == QScriptValuePrivate::JavaScriptCore) {
             QScriptEnginePrivate *eng_p = d->engine ? d->engine : other.d_ptr->engine;
             if (eng_p)
-                return JSC::JSValue::strictEqual(d->jscValue, eng_p->scriptValueToJSCValue(other));
+                return JSC::JSValue::strictEqual(eng_p->currentFrame, d->jscValue, eng_p->scriptValueToJSCValue(other));
         } else if (other.d_ptr->type == QScriptValuePrivate::JavaScriptCore) {
             QScriptEnginePrivate *eng_p = other.d_ptr->engine ? other.d_ptr->engine : d->engine;
             if (eng_p)
-                return JSC::JSValue::strictEqual(eng_p->scriptValueToJSCValue(*this), other.d_ptr->jscValue);
+                return JSC::JSValue::strictEqual(eng_p->currentFrame, eng_p->scriptValueToJSCValue(*this), other.d_ptr->jscValue);
         }
 
         return false;
     }
     switch (d->type) {
-    case QScriptValuePrivate::JavaScriptCore:
-        return JSC::JSValue::strictEqual(d->jscValue, other.d_ptr->jscValue);
+    case QScriptValuePrivate::JavaScriptCore: {
+        QScriptEnginePrivate *eng_p = d->engine ? d->engine : other.d_ptr->engine;
+        JSC::ExecState *exec = eng_p ? eng_p->currentFrame : 0;
+        return JSC::JSValue::strictEqual(exec, d->jscValue, other.d_ptr->jscValue);
+    }
     case QScriptValuePrivate::Number:
         return (d->numberValue == other.d_ptr->numberValue);
     case QScriptValuePrivate::String:
diff --git a/src/script/api/qscriptvalue_p.h b/src/script/api/qscriptvalue_p.h
index 089b923..853c6c8 100644
--- a/src/script/api/qscriptvalue_p.h
+++ b/src/script/api/qscriptvalue_p.h
@@ -86,17 +86,18 @@ public:
         return q.d_ptr->engine;
     }
 
-    inline JSC::JSValue property(const JSC::Identifier &id, int resolveMode) const;
-    inline JSC::JSValue property(quint32 index, int resolveMode) const;
-    inline JSC::JSValue property(const JSC::UString &, int resolveMode) const;
+    inline JSC::JSValue property(const JSC::Identifier &id,
+                                 const QScriptValue::ResolveFlags &mode = QScriptValue::ResolvePrototype) const;
+    inline JSC::JSValue property(quint32 index, const QScriptValue::ResolveFlags &mode = QScriptValue::ResolvePrototype) const;
+    inline JSC::JSValue property(const JSC::UString &, const QScriptValue::ResolveFlags &mode = QScriptValue::ResolvePrototype) const;
     inline void setProperty(const JSC::UString &name, const JSC::JSValue &value,
-                            const QScriptValue::PropertyFlags &flags);
+                            const QScriptValue::PropertyFlags &flags = QScriptValue::KeepExistingFlags);
     inline void setProperty(const JSC::Identifier &id, const JSC::JSValue &value,
-                            const QScriptValue::PropertyFlags &flags);
+                            const QScriptValue::PropertyFlags &flags = QScriptValue::KeepExistingFlags);
     inline void setProperty(quint32 index, const JSC::JSValue &value,
-                            const QScriptValue::PropertyFlags &flags);
+                            const QScriptValue::PropertyFlags &flags = QScriptValue::KeepExistingFlags);
     inline QScriptValue::PropertyFlags propertyFlags(
-        const JSC::Identifier &id, const QScriptValue::ResolveFlags &mode) const;
+        const JSC::Identifier &id, const QScriptValue::ResolveFlags &mode = QScriptValue::ResolvePrototype) const;
 
     void detachFromEngine();
 
diff --git a/src/script/api/qscriptvalueiterator.cpp b/src/script/api/qscriptvalueiterator.cpp
index 24d9754..5c1e6f2 100644
--- a/src/script/api/qscriptvalueiterator.cpp
+++ b/src/script/api/qscriptvalueiterator.cpp
@@ -84,28 +84,38 @@ public:
     QScriptValueIteratorPrivate()
         : initialized(false)
     {}
+
+    QScriptValuePrivate *object() const
+    {
+        return QScriptValuePrivate::get(objectValue);
+    }
+
+    QScriptEnginePrivate *engine() const
+    {
+        return QScriptEnginePrivate::get(objectValue.engine());
+    }
+
     void ensureInitialized()
     {
         if (initialized)
             return;
-        QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(object.engine());
+        QScriptEnginePrivate *eng_p = engine();
         JSC::ExecState *exec = eng_p->globalExec();
         JSC::PropertyNameArray propertyNamesArray(exec);
-        propertyNamesArray.setShouldCache(false);
-        JSC::asObject(QScriptValuePrivate::get(object)->jscValue)->getOwnPropertyNames(exec, propertyNamesArray, /*includeNonEnumerable=*/true);
+        JSC::asObject(object()->jscValue)->getOwnPropertyNames(exec, propertyNamesArray, JSC::IncludeDontEnumProperties);
 
         JSC::PropertyNameArray::const_iterator propertyNamesIt = propertyNamesArray.begin();
         for(; propertyNamesIt != propertyNamesArray.end(); ++propertyNamesIt) {
-            propertyNames.append(propertyNamesIt->ustring());
+            propertyNames.append(*propertyNamesIt);
         }
         it = propertyNames.begin();
         initialized = true;
     }
 
-    QScriptValue object;
-    QLinkedList<JSC::UString> propertyNames;
-    QLinkedList<JSC::UString>::iterator it;
-    QLinkedList<JSC::UString>::iterator current;
+    QScriptValue objectValue;
+    QLinkedList<JSC::Identifier> propertyNames;
+    QLinkedList<JSC::Identifier>::iterator it;
+    QLinkedList<JSC::Identifier>::iterator current;
     bool initialized;
 };
 
@@ -119,7 +129,7 @@ QScriptValueIterator::QScriptValueIterator(const QScriptValue &object)
 {
     if (object.isObject()) {
         d_ptr.reset(new QScriptValueIteratorPrivate());
-        d_ptr->object = object;
+        d_ptr->objectValue = object;
     }
 }
 
@@ -240,9 +250,9 @@ void QScriptValueIterator::toBack()
 QString QScriptValueIterator::name() const
 {
     Q_D(const QScriptValueIterator);
-    if (!d || !d->initialized)
+    if (!d || !d->initialized || !d->engine())
         return QString();
-    return *d->current;
+    return d->current->ustring();
 }
 
 /*!
@@ -254,9 +264,9 @@ QString QScriptValueIterator::name() const
 QScriptString QScriptValueIterator::scriptName() const
 {
     Q_D(const QScriptValueIterator);
-    if (!d || !d->initialized)
+    if (!d || !d->initialized || !d->engine())
         return QScriptString();
-    return d->object.engine()->toStringHandle(name());
+    return d->engine()->toStringHandle(*d->current);
 }
 
 /*!
@@ -268,9 +278,10 @@ QScriptString QScriptValueIterator::scriptName() const
 QScriptValue QScriptValueIterator::value() const
 {
     Q_D(const QScriptValueIterator);
-    if (!d || !d->initialized)
+    if (!d || !d->initialized || !d->engine())
         return QScriptValue();
-    return d->object.property(name());
+    JSC::JSValue jsValue = d->object()->property(*d->current);
+    return d->engine()->scriptValueFromJSCValue(jsValue);
 }
 
 /*!
@@ -282,9 +293,10 @@ QScriptValue QScriptValueIterator::value() const
 void QScriptValueIterator::setValue(const QScriptValue &value)
 {
     Q_D(QScriptValueIterator);
-    if (!d || !d->initialized)
+    if (!d || !d->initialized || !d->engine())
         return;
-    d->object.setProperty(name(), value);
+    JSC::JSValue jsValue = d->engine()->scriptValueToJSCValue(value);
+    d->object()->setProperty(*d->current, jsValue);
 }
 
 /*!
@@ -296,9 +308,9 @@ void QScriptValueIterator::setValue(const QScriptValue &value)
 QScriptValue::PropertyFlags QScriptValueIterator::flags() const
 {
     Q_D(const QScriptValueIterator);
-    if (!d || !d->initialized)
+    if (!d || !d->initialized || !d->engine())
         return 0;
-    return d->object.propertyFlags(name());
+    return d->object()->propertyFlags(*d->current);
 }
 
 /*!
@@ -310,9 +322,9 @@ QScriptValue::PropertyFlags QScriptValueIterator::flags() const
 void QScriptValueIterator::remove()
 {
     Q_D(QScriptValueIterator);
-    if (!d || !d->initialized)
+    if (!d || !d->initialized || !d->engine())
         return;
-    d->object.setProperty(name(), QScriptValue());
+    d->object()->setProperty(*d->current, JSC::JSValue());
     d->propertyNames.erase(d->current);
 }
 
@@ -326,7 +338,7 @@ QScriptValueIterator& QScriptValueIterator::operator=(QScriptValue &object)
     d_ptr.reset();
     if (object.isObject()) {
         d_ptr.reset(new QScriptValueIteratorPrivate());
-        d_ptr->object = object;
+        d_ptr->objectValue = object;
     }
     return *this;
 }
diff --git a/src/script/bridge/qscriptactivationobject.cpp b/src/script/bridge/qscriptactivationobject.cpp
index 7189f2e..6a8ae56 100644
--- a/src/script/bridge/qscriptactivationobject.cpp
+++ b/src/script/bridge/qscriptactivationobject.cpp
@@ -63,20 +63,20 @@ bool QScriptActivationObject::getOwnPropertySlot(JSC::ExecState* exec, const JSC
     return JSC::JSVariableObject::getOwnPropertySlot(exec, propertyName, slot);
 }
 
-bool QScriptActivationObject::getPropertyAttributes(JSC::ExecState* exec, const JSC::Identifier& propertyName, unsigned& attributes) const
+bool QScriptActivationObject::getOwnPropertyDescriptor(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::PropertyDescriptor& descriptor)
 {
     if (d_ptr()->delegate != 0)
-        return d_ptr()->delegate->getPropertyAttributes(exec, propertyName, attributes);
-    return JSC::JSVariableObject::getPropertyAttributes(exec, propertyName, attributes);
+        return d_ptr()->delegate->getOwnPropertyDescriptor(exec, propertyName, descriptor);
+    return JSC::JSVariableObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
 }
 
-void QScriptActivationObject::getOwnPropertyNames(JSC::ExecState* exec, JSC::PropertyNameArray& propertyNames, bool includeNonEnumerable)
+void QScriptActivationObject::getOwnPropertyNames(JSC::ExecState* exec, JSC::PropertyNameArray& propertyNames, JSC::EnumerationMode mode)
 {
     if (d_ptr()->delegate != 0) {
-        d_ptr()->delegate->getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+        d_ptr()->delegate->getOwnPropertyNames(exec, propertyNames, mode);
         return;
     }
-    return JSC::JSVariableObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+    return JSC::JSVariableObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 void QScriptActivationObject::putWithAttributes(JSC::ExecState *exec, const JSC::Identifier &propertyName, JSC::JSValue value, unsigned attributes)
@@ -111,11 +111,11 @@ void QScriptActivationObject::put(JSC::ExecState* exec, unsigned propertyName, J
     JSC::JSVariableObject::put(exec, propertyName, value);
 }
 
-bool QScriptActivationObject::deleteProperty(JSC::ExecState* exec, const JSC::Identifier& propertyName, bool checkDontDelete)
+bool QScriptActivationObject::deleteProperty(JSC::ExecState* exec, const JSC::Identifier& propertyName)
 {
     if (d_ptr()->delegate != 0)
-        return d_ptr()->delegate->deleteProperty(exec, propertyName, checkDontDelete);
-    return JSC::JSVariableObject::deleteProperty(exec, propertyName, checkDontDelete);
+        return d_ptr()->delegate->deleteProperty(exec, propertyName);
+    return JSC::JSVariableObject::deleteProperty(exec, propertyName);
 }
 
 void QScriptActivationObject::defineGetter(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::JSObject* getterFunction)
diff --git a/src/script/bridge/qscriptactivationobject_p.h b/src/script/bridge/qscriptactivationobject_p.h
index 7648a26..72ea11f 100644
--- a/src/script/bridge/qscriptactivationobject_p.h
+++ b/src/script/bridge/qscriptactivationobject_p.h
@@ -51,14 +51,14 @@ public:
     virtual bool isDynamicScope() const { return true; }
 
     virtual bool getOwnPropertySlot(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertySlot&);
-    virtual bool getPropertyAttributes(JSC::ExecState*, const JSC::Identifier&, unsigned&) const;
-    virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&, bool includeNonEnumerable = false);
+    virtual bool getOwnPropertyDescriptor(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertyDescriptor&);
+    virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&, JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
 
     virtual void putWithAttributes(JSC::ExecState *exec, const JSC::Identifier &propertyName, JSC::JSValue value, unsigned attributes);
     virtual void put(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSValue value, JSC::PutPropertySlot&);
     virtual void put(JSC::ExecState*, unsigned propertyName, JSC::JSValue value);
 
-    virtual bool deleteProperty(JSC::ExecState*, const JSC::Identifier& propertyName, bool checkDontDelete = true);
+    virtual bool deleteProperty(JSC::ExecState*, const JSC::Identifier& propertyName);
 
     virtual void defineGetter(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSObject* getterFunction);
     virtual void defineSetter(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSObject* setterFunction);
diff --git a/src/script/bridge/qscriptclassobject.cpp b/src/script/bridge/qscriptclassobject.cpp
index ce0a08e..a7b5f48 100644
--- a/src/script/bridge/qscriptclassobject.cpp
+++ b/src/script/bridge/qscriptclassobject.cpp
@@ -84,6 +84,47 @@ bool ClassObjectDelegate::getOwnPropertySlot(QScriptObject* object,
     return false;
 }
 
+bool ClassObjectDelegate::getOwnPropertyDescriptor(QScriptObject *object,
+                                                   JSC::ExecState *exec,
+                                                   const JSC::Identifier &propertyName,
+                                                   JSC::PropertyDescriptor &descriptor)
+{
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScript::SaveFrameHelper saveFrame(engine, exec);
+    // for compatibility with the old back-end, normal JS properties
+    // are queried first.
+    if (QScriptObjectDelegate::getOwnPropertyDescriptor(object, exec, propertyName, descriptor))
+        return true;
+
+    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
+    QScriptString scriptName;
+    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
+    QScriptStringPrivate::init(scriptName, &scriptName_d);
+    uint id = 0;
+    QScriptClass::QueryFlags qflags = m_scriptClass->queryProperty(
+        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
+    if (qflags & QScriptClass::HandlesReadAccess) {
+        QScriptValue::PropertyFlags pflags = m_scriptClass->propertyFlags(scriptObject, scriptName, id);
+        unsigned attribs = 0;
+        if (pflags & QScriptValue::ReadOnly)
+            attribs |= JSC::ReadOnly;
+        if (pflags & QScriptValue::SkipInEnumeration)
+            attribs |= JSC::DontEnum;
+        if (pflags & QScriptValue::Undeletable)
+            attribs |= JSC::DontDelete;
+        if (pflags & QScriptValue::PropertyGetter)
+            attribs |= JSC::Getter;
+        if (pflags & QScriptValue::PropertySetter)
+            attribs |= JSC::Setter;
+        attribs |= pflags & QScriptValue::UserRange;
+        // Rather than calling the getter, we could return an access descriptor here.
+        QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
+        descriptor.setDescriptor(engine->scriptValueToJSCValue(value), attribs);
+        return true;
+    }
+    return false;
+}
+
 void ClassObjectDelegate::put(QScriptObject* object, JSC::ExecState *exec,
                               const JSC::Identifier &propertyName,
                               JSC::JSValue value, JSC::PutPropertySlot &slot)
@@ -105,8 +146,7 @@ void ClassObjectDelegate::put(QScriptObject* object, JSC::ExecState *exec,
 }
 
 bool ClassObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState *exec,
-                                         const JSC::Identifier &propertyName,
-                                         bool checkDontDelete)
+                                         const JSC::Identifier &propertyName)
 {
     // ### avoid duplication of put()
     QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
@@ -124,44 +164,12 @@ bool ClassObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState *
         m_scriptClass->setProperty(scriptObject, scriptName, id, QScriptValue());
         return true;
     }
-    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName, checkDontDelete);
-}
-
-bool ClassObjectDelegate::getPropertyAttributes(const QScriptObject* object, JSC::ExecState *exec,
-                                                const JSC::Identifier &propertyName,
-                                                unsigned &attribs) const
-{
-    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
-    QScript::SaveFrameHelper saveFrame(engine, exec);
-    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
-    QScriptString scriptName;
-    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
-    QScriptStringPrivate::init(scriptName, &scriptName_d);
-    uint id = 0;
-    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
-        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
-    if (flags & QScriptClass::HandlesReadAccess) {
-        QScriptValue::PropertyFlags flags = m_scriptClass->propertyFlags(scriptObject, scriptName, id);
-        attribs = 0;
-        if (flags & QScriptValue::ReadOnly)
-            attribs |= JSC::ReadOnly;
-        if (flags & QScriptValue::SkipInEnumeration)
-            attribs |= JSC::DontEnum;
-        if (flags & QScriptValue::Undeletable)
-            attribs |= JSC::DontDelete;
-        if (flags & QScriptValue::PropertyGetter)
-            attribs |= JSC::Getter;
-        if (flags & QScriptValue::PropertySetter)
-            attribs |= JSC::Setter;
-        attribs |= flags & QScriptValue::UserRange;
-        return true;
-    }
-    return QScriptObjectDelegate::getPropertyAttributes(object, exec, propertyName, attribs);
+    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName);
 }
 
 void ClassObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::ExecState *exec,
                                               JSC::PropertyNameArray &propertyNames,
-                                              bool includeNonEnumerable)
+                                              JSC::EnumerationMode mode)
 {
     QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
     QScript::SaveFrameHelper saveFrame(engine, exec);
@@ -175,7 +183,7 @@ void ClassObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::ExecSt
         }
         delete it;
     }
-    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, includeNonEnumerable);
+    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, mode);
 }
 
 JSC::CallType ClassObjectDelegate::getCallData(QScriptObject*, JSC::CallData &callData)
diff --git a/src/script/bridge/qscriptclassobject_p.h b/src/script/bridge/qscriptclassobject_p.h
index 89142ab..83fa61b 100644
--- a/src/script/bridge/qscriptclassobject_p.h
+++ b/src/script/bridge/qscriptclassobject_p.h
@@ -60,18 +60,17 @@ public:
     virtual bool getOwnPropertySlot(QScriptObject*, JSC::ExecState*,
                                     const JSC::Identifier& propertyName,
                                     JSC::PropertySlot&);
+    virtual bool getOwnPropertyDescriptor(QScriptObject*, JSC::ExecState*,
+                                          const JSC::Identifier& propertyName,
+                                          JSC::PropertyDescriptor&);
     virtual void put(QScriptObject*, JSC::ExecState* exec,
                      const JSC::Identifier& propertyName,
                      JSC::JSValue, JSC::PutPropertySlot&);
     virtual bool deleteProperty(QScriptObject*, JSC::ExecState*,
-                                const JSC::Identifier& propertyName,
-                                bool checkDontDelete = true);
-    virtual bool getPropertyAttributes(const QScriptObject*, JSC::ExecState*,
-                                       const JSC::Identifier&,
-                                       unsigned&) const;
+                                const JSC::Identifier& propertyName);
     virtual void getOwnPropertyNames(QScriptObject*, JSC::ExecState*,
                                      JSC::PropertyNameArray&,
-                                     bool includeNonEnumerable = false);
+                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
 
     virtual JSC::CallType getCallData(QScriptObject*, JSC::CallData&);
     static JSC::JSValue JSC_HOST_CALL call(JSC::ExecState*, JSC::JSObject*,
diff --git a/src/script/bridge/qscriptdeclarativeclass.cpp b/src/script/bridge/qscriptdeclarativeclass.cpp
index 1d11ede..a753f59 100644
--- a/src/script/bridge/qscriptdeclarativeclass.cpp
+++ b/src/script/bridge/qscriptdeclarativeclass.cpp
@@ -141,19 +141,22 @@ QScriptValue QScriptDeclarativeClass::Value::toScriptValue(QScriptEngine *engine
 }
 
 QScriptDeclarativeClass::PersistentIdentifier::PersistentIdentifier()
-: identifier(0)
+    : identifier(0), engine(0)
 {
     new (&d) JSC::Identifier();
 }
 
 QScriptDeclarativeClass::PersistentIdentifier::~PersistentIdentifier()
 {
+    if (engine)
+        JSC::setCurrentIdentifierTable(engine->globalData->identifierTable);
     ((JSC::Identifier &)d).JSC::Identifier::~Identifier();
 }
 
 QScriptDeclarativeClass::PersistentIdentifier::PersistentIdentifier(const PersistentIdentifier &other)
 {
     identifier = other.identifier;
+    engine = other.engine;
     new (&d) JSC::Identifier((JSC::Identifier &)(other.d));
 }
 
@@ -161,6 +164,7 @@ QScriptDeclarativeClass::PersistentIdentifier &
 QScriptDeclarativeClass::PersistentIdentifier::operator=(const PersistentIdentifier &other)
 {
     identifier = other.identifier;
+    engine = other.engine;
     ((JSC::Identifier &)d) = (JSC::Identifier &)(other.d);
     return *this;
 }
@@ -419,7 +423,7 @@ QScriptDeclarativeClass::createPersistentIdentifier(const QString &str)
         static_cast<QScriptEnginePrivate *>(QObjectPrivate::get(d_ptr->engine)); 
     JSC::ExecState* exec = p->currentFrame;
 
-    PersistentIdentifier rv(true);
+    PersistentIdentifier rv(p);
     new (&rv.d) JSC::Identifier(exec, (UChar *)str.constData(), str.size());
     rv.identifier = (void *)((JSC::Identifier &)rv.d).ustring().rep();
     return rv;
@@ -432,7 +436,7 @@ QScriptDeclarativeClass::createPersistentIdentifier(const Identifier &id)
         static_cast<QScriptEnginePrivate *>(QObjectPrivate::get(d_ptr->engine)); 
     JSC::ExecState* exec = p->currentFrame;
 
-    PersistentIdentifier rv(true);
+    PersistentIdentifier rv(p);
     new (&rv.d) JSC::Identifier(exec, (JSC::UString::Rep *)id);
     rv.identifier = (void *)((JSC::Identifier &)rv.d).ustring().rep();
     return rv;
diff --git a/src/script/bridge/qscriptdeclarativeclass_p.h b/src/script/bridge/qscriptdeclarativeclass_p.h
index a0fd6d5..a187391 100644
--- a/src/script/bridge/qscriptdeclarativeclass_p.h
+++ b/src/script/bridge/qscriptdeclarativeclass_p.h
@@ -104,7 +104,8 @@ public:
 
     private:
         friend class QScriptDeclarativeClass;
-        PersistentIdentifier(bool) : identifier(0), d(0) {}
+        PersistentIdentifier(QScriptEnginePrivate *e) : identifier(0), engine(e), d(0) {}
+        QScriptEnginePrivate *engine;
         void *d;
     };
 
diff --git a/src/script/bridge/qscriptdeclarativeobject.cpp b/src/script/bridge/qscriptdeclarativeobject.cpp
index c6ab6a7..a45bfbb 100644
--- a/src/script/bridge/qscriptdeclarativeobject.cpp
+++ b/src/script/bridge/qscriptdeclarativeobject.cpp
@@ -66,7 +66,6 @@ bool DeclarativeObjectDelegate::getOwnPropertySlot(QScriptObject* object,
                                                    const JSC::Identifier &propertyName,
                                                    JSC::PropertySlot &slot)
 {
-    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
     QScriptDeclarativeClass::Identifier identifier = (void *)propertyName.ustring().rep();
 
     QScriptDeclarativeClassPrivate *p = QScriptDeclarativeClassPrivate::get(m_class);
@@ -106,43 +105,14 @@ void DeclarativeObjectDelegate::put(QScriptObject* object, JSC::ExecState *exec,
 }
 
 bool DeclarativeObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState *exec,
-                                               const JSC::Identifier &propertyName,
-                                               bool checkDontDelete)
-{
-    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName, checkDontDelete);
-}
-
-bool DeclarativeObjectDelegate::getPropertyAttributes(const QScriptObject* object, 
-                                                      JSC::ExecState *exec,
-                                                      const JSC::Identifier &propertyName,
-                                                      unsigned &attribs) const
+                                               const JSC::Identifier &propertyName)
 {
-    QScriptDeclarativeClass::Identifier identifier = (void *)propertyName.ustring().rep();
-
-    QScriptClass::QueryFlags flags = 
-        m_class->queryProperty(m_object, identifier, QScriptClass::HandlesReadAccess);
-    if (flags & QScriptClass::HandlesReadAccess) {
-        QScriptValue::PropertyFlags flags = m_class->propertyFlags(m_object, identifier);
-        attribs = 0;
-        if (flags & QScriptValue::ReadOnly)
-            attribs |= JSC::ReadOnly;
-        if (flags & QScriptValue::SkipInEnumeration)
-            attribs |= JSC::DontEnum;
-        if (flags & QScriptValue::Undeletable)
-            attribs |= JSC::DontDelete;
-        if (flags & QScriptValue::PropertyGetter)
-            attribs |= JSC::Getter;
-        if (flags & QScriptValue::PropertySetter)
-            attribs |= JSC::Setter;
-        attribs |= flags & QScriptValue::UserRange;
-        return true;
-    }
-    return QScriptObjectDelegate::getPropertyAttributes(object, exec, propertyName, attribs);
+    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName);
 }
 
 void DeclarativeObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::ExecState *exec,
                                                     JSC::PropertyNameArray &propertyNames,
-                                                    bool includeNonEnumerable)
+                                                    JSC::EnumerationMode mode)
 {
     QStringList properties = m_class->propertyNames(m_object);
     for (int ii = 0; ii < properties.count(); ++ii) {
@@ -150,7 +120,7 @@ void DeclarativeObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::
         propertyNames.add(JSC::Identifier(exec, name));
     }
 
-    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, includeNonEnumerable);
+    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, mode);
 }
 
 JSC::CallType DeclarativeObjectDelegate::getCallData(QScriptObject *object, JSC::CallData &callData)
diff --git a/src/script/bridge/qscriptdeclarativeobject_p.h b/src/script/bridge/qscriptdeclarativeobject_p.h
index ec8a43e..5024a71 100644
--- a/src/script/bridge/qscriptdeclarativeobject_p.h
+++ b/src/script/bridge/qscriptdeclarativeobject_p.h
@@ -81,14 +81,10 @@ public:
                      const JSC::Identifier& propertyName,
                      JSC::JSValue, JSC::PutPropertySlot&);
     virtual bool deleteProperty(QScriptObject*, JSC::ExecState*,
-                                const JSC::Identifier& propertyName,
-                                bool checkDontDelete = true);
-    virtual bool getPropertyAttributes(const QScriptObject*, JSC::ExecState*,
-                                       const JSC::Identifier&,
-                                       unsigned&) const;
+                                const JSC::Identifier& propertyName);
     virtual void getOwnPropertyNames(QScriptObject*, JSC::ExecState*,
                                      JSC::PropertyNameArray&, 
-                                     bool includeNonEnumerable = false);
+                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
 
     virtual JSC::CallType getCallData(QScriptObject*, JSC::CallData&);
     static JSC::JSValue JSC_HOST_CALL call(JSC::ExecState*, JSC::JSObject*,
diff --git a/src/script/bridge/qscriptglobalobject.cpp b/src/script/bridge/qscriptglobalobject.cpp
index e7ea0df..4c002b7 100644
--- a/src/script/bridge/qscriptglobalobject.cpp
+++ b/src/script/bridge/qscriptglobalobject.cpp
@@ -72,6 +72,23 @@ bool GlobalObject::getOwnPropertySlot(JSC::ExecState* exec,
     return JSC::JSGlobalObject::getOwnPropertySlot(exec, propertyName, slot);
 }
 
+bool GlobalObject::getOwnPropertyDescriptor(JSC::ExecState* exec,
+                                            const JSC::Identifier& propertyName,
+                                            JSC::PropertyDescriptor& descriptor)
+{
+    // Must match the logic of getOwnPropertySlot().
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    if (propertyName == exec->propertyNames().arguments && engine->currentFrame->argumentCount() > 0) {
+        // ### Can we get rid of this special handling of the arguments property?
+        JSC::JSValue args = engine->scriptValueToJSCValue(engine->contextForFrame(engine->currentFrame)->argumentsObject());
+        descriptor.setValue(args);
+        return true;
+    }
+    if (customGlobalObject)
+        return customGlobalObject->getOwnPropertyDescriptor(exec, propertyName, descriptor);
+    return JSC::JSGlobalObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
+}
+
 void GlobalObject::put(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                        JSC::JSValue value, JSC::PutPropertySlot& slot)
 {
@@ -90,29 +107,20 @@ void GlobalObject::putWithAttributes(JSC::ExecState* exec, const JSC::Identifier
         JSC::JSGlobalObject::putWithAttributes(exec, propertyName, value, attributes);
 }
 
-bool GlobalObject::deleteProperty(JSC::ExecState* exec,
-                                  const JSC::Identifier& propertyName, bool checkDontDelete)
-{
-    if (customGlobalObject)
-        return customGlobalObject->deleteProperty(exec, propertyName, checkDontDelete);
-    return JSC::JSGlobalObject::deleteProperty(exec, propertyName, checkDontDelete);
-}
-
-bool GlobalObject::getPropertyAttributes(JSC::ExecState* exec, const JSC::Identifier& propertyName,
-                                         unsigned& attributes) const
+bool GlobalObject::deleteProperty(JSC::ExecState* exec, const JSC::Identifier& propertyName)
 {
     if (customGlobalObject)
-        return customGlobalObject->getPropertyAttributes(exec, propertyName, attributes);
-    return JSC::JSGlobalObject::getPropertyAttributes(exec, propertyName, attributes);
+        return customGlobalObject->deleteProperty(exec, propertyName);
+    return JSC::JSGlobalObject::deleteProperty(exec, propertyName);
 }
 
 void GlobalObject::getOwnPropertyNames(JSC::ExecState* exec, JSC::PropertyNameArray& propertyNames,
-                                       bool includeNonEnumerable)
+                                       JSC::EnumerationMode mode)
 {
     if (customGlobalObject)
-        customGlobalObject->getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+        customGlobalObject->getOwnPropertyNames(exec, propertyNames, mode);
     else
-        JSC::JSGlobalObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+        JSC::JSGlobalObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 void GlobalObject::defineGetter(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::JSObject* getterFunction, unsigned attributes)
diff --git a/src/script/bridge/qscriptglobalobject_p.h b/src/script/bridge/qscriptglobalobject_p.h
index b210f78..c0a419f 100644
--- a/src/script/bridge/qscriptglobalobject_p.h
+++ b/src/script/bridge/qscriptglobalobject_p.h
@@ -54,17 +54,17 @@ public:
     virtual bool getOwnPropertySlot(JSC::ExecState*,
                                     const JSC::Identifier& propertyName,
                                     JSC::PropertySlot&);
+    virtual bool getOwnPropertyDescriptor(JSC::ExecState*,
+                                          const JSC::Identifier& propertyName,
+                                          JSC::PropertyDescriptor&);
     virtual void put(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                      JSC::JSValue, JSC::PutPropertySlot&);
     virtual void putWithAttributes(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                                    JSC::JSValue value, unsigned attributes);
     virtual bool deleteProperty(JSC::ExecState*,
-                                const JSC::Identifier& propertyName,
-                                bool checkDontDelete = true);
-    virtual bool getPropertyAttributes(JSC::ExecState*, const JSC::Identifier&,
-                                       unsigned&) const;
+                                const JSC::Identifier& propertyName);
     virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&,
-                                     bool includeNonEnumerable = false);
+                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
     virtual void defineGetter(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSObject* getterFunction, unsigned attributes = 0);
     virtual void defineSetter(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSObject* setterFunction, unsigned attributes = 0);
     virtual JSC::JSValue lookupGetter(JSC::ExecState*, const JSC::Identifier& propertyName);
@@ -94,19 +94,20 @@ public:
                                     const JSC::Identifier& propertyName,
                                     JSC::PropertySlot& slot)
     { return originalGlobalObject->JSC::JSGlobalObject::getOwnPropertySlot(exec, propertyName, slot); }
+    virtual bool getOwnPropertyDescriptor(JSC::ExecState* exec,
+                                          const JSC::Identifier& propertyName,
+                                          JSC::PropertyDescriptor& descriptor)
+    { return originalGlobalObject->JSC::JSGlobalObject::getOwnPropertyDescriptor(exec, propertyName, descriptor); }
     virtual void put(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                      JSC::JSValue value, JSC::PutPropertySlot& slot)
     { originalGlobalObject->JSC::JSGlobalObject::put(exec, propertyName, value, slot); }
     virtual void putWithAttributes(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::JSValue value, unsigned attributes)
     { originalGlobalObject->JSC::JSGlobalObject::putWithAttributes(exec, propertyName, value, attributes); }
     virtual bool deleteProperty(JSC::ExecState* exec,
-                                const JSC::Identifier& propertyName, bool checkDontDelete = true)
-    { return originalGlobalObject->JSC::JSGlobalObject::deleteProperty(exec, propertyName, checkDontDelete); }
-    virtual bool getPropertyAttributes(JSC::ExecState* exec, const JSC::Identifier& propertyName,
-                                       unsigned& attributes) const
-    { return originalGlobalObject->JSC::JSGlobalObject::getPropertyAttributes(exec, propertyName, attributes); }
-    virtual void getOwnPropertyNames(JSC::ExecState* exec, JSC::PropertyNameArray& propertyNames, bool includeNonEnumerable = false)
-    { originalGlobalObject->JSC::JSGlobalObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable); }
+                                const JSC::Identifier& propertyName)
+    { return originalGlobalObject->JSC::JSGlobalObject::deleteProperty(exec, propertyName); }
+    virtual void getOwnPropertyNames(JSC::ExecState* exec, JSC::PropertyNameArray& propertyNames, JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties)
+    { originalGlobalObject->JSC::JSGlobalObject::getOwnPropertyNames(exec, propertyNames, mode); }
     virtual void defineGetter(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::JSObject* getterFunction, unsigned attributes)
     { originalGlobalObject->JSC::JSGlobalObject::defineGetter(exec, propertyName, getterFunction, attributes); }
     virtual void defineSetter(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::JSObject* setterFunction, unsigned attributes)
diff --git a/src/script/bridge/qscriptobject.cpp b/src/script/bridge/qscriptobject.cpp
index 3db109e..9b6910e 100644
--- a/src/script/bridge/qscriptobject.cpp
+++ b/src/script/bridge/qscriptobject.cpp
@@ -81,30 +81,21 @@ void QScriptObject::put(JSC::ExecState* exec, const JSC::Identifier& propertyNam
 }
 
 bool QScriptObject::deleteProperty(JSC::ExecState* exec,
-                                   const JSC::Identifier& propertyName,
-                                   bool checkDontDelete)
+                                   const JSC::Identifier& propertyName)
 {
     if (!d || !d->delegate)
-        return JSC::JSObject::deleteProperty(exec, propertyName, checkDontDelete);
-    return d->delegate->deleteProperty(this, exec, propertyName, checkDontDelete);
-}
-
-bool QScriptObject::getPropertyAttributes(JSC::ExecState* exec, const JSC::Identifier& propertyName,
-                                          unsigned& attributes) const
-{
-    if (!d || !d->delegate)
-        return JSC::JSObject::getPropertyAttributes(exec, propertyName, attributes);
-    return d->delegate->getPropertyAttributes(this, exec, propertyName, attributes);
+        return JSC::JSObject::deleteProperty(exec, propertyName);
+    return d->delegate->deleteProperty(this, exec, propertyName);
 }
 
 void QScriptObject::getOwnPropertyNames(JSC::ExecState* exec, JSC::PropertyNameArray& propertyNames,
-                                        bool includeNonEnumerable)
+                                        JSC::EnumerationMode mode)
 {
     if (!d || !d->delegate) {
-        JSC::JSObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+        JSC::JSObject::getOwnPropertyNames(exec, propertyNames, mode);
         return;
     }
-    d->delegate->getOwnPropertyNames(this, exec, propertyNames, includeNonEnumerable);
+    d->delegate->getOwnPropertyNames(this, exec, propertyNames, mode);
 }
 
 bool QScriptObject::compareToObject(JSC::ExecState* exec, JSC::JSObject *other)
@@ -189,25 +180,16 @@ void QScriptObjectDelegate::put(QScriptObject* object, JSC::ExecState* exec,
 }
 
 bool QScriptObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState* exec,
-                                           const JSC::Identifier& propertyName,
-                                           bool checkDontDelete)
-{
-    return object->JSC::JSObject::deleteProperty(exec, propertyName, checkDontDelete);
-}
-
-bool QScriptObjectDelegate::getPropertyAttributes(const QScriptObject* object,
-                                                  JSC::ExecState* exec,
-                                                  const JSC::Identifier& propertyName,
-                                                  unsigned& attributes) const
+                                           const JSC::Identifier& propertyName)
 {
-    return object->JSC::JSObject::getPropertyAttributes(exec, propertyName, attributes);
+    return object->JSC::JSObject::deleteProperty(exec, propertyName);
 }
 
 void QScriptObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::ExecState* exec,
                                                 JSC::PropertyNameArray& propertyNames,
-                                                bool includeNonEnumerable)
+                                                JSC::EnumerationMode mode)
 {
-    object->JSC::JSObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+    object->JSC::JSObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 void QScriptObjectDelegate::markChildren(QScriptObject* object, JSC::MarkStack& markStack)
diff --git a/src/script/bridge/qscriptobject_p.h b/src/script/bridge/qscriptobject_p.h
index 4d15bee..f6de418 100644
--- a/src/script/bridge/qscriptobject_p.h
+++ b/src/script/bridge/qscriptobject_p.h
@@ -67,12 +67,9 @@ public:
     virtual void put(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                      JSC::JSValue, JSC::PutPropertySlot&);
     virtual bool deleteProperty(JSC::ExecState*,
-                                const JSC::Identifier& propertyName,
-                                bool checkDontDelete = true);
-    virtual bool getPropertyAttributes(JSC::ExecState*, const JSC::Identifier&,
-                                       unsigned&) const;
+                                const JSC::Identifier& propertyName);
     virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&,
-                                     bool includeNonEnumerable = false);
+                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
     virtual void markChildren(JSC::MarkStack& markStack);
     virtual JSC::CallType getCallData(JSC::CallData&);
     virtual JSC::ConstructType getConstructData(JSC::ConstructData&);
@@ -84,7 +81,7 @@ public:
 
     static WTF::PassRefPtr<JSC::Structure> createStructure(JSC::JSValue prototype)
     {
-        return JSC::Structure::create(prototype, JSC::TypeInfo(JSC::ObjectType, JSC::ImplementsHasInstance | JSC::OverridesHasInstance));
+        return JSC::Structure::create(prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags));
     }
 
     inline JSC::JSValue data() const;
@@ -94,6 +91,8 @@ public:
     inline void setDelegate(QScriptObjectDelegate *delegate);
 
 protected:
+    static const unsigned StructureFlags = JSC::ImplementsHasInstance | JSC::OverridesHasInstance | JSC::OverridesGetOwnPropertySlot | JSC::OverridesMarkChildren | JSC::OverridesGetPropertyNames | JSObject::StructureFlags;
+
     Data *d;
 };
 
@@ -128,12 +127,9 @@ public:
     virtual void put(QScriptObject*, JSC::ExecState* exec, const JSC::Identifier& propertyName,
                      JSC::JSValue, JSC::PutPropertySlot&);
     virtual bool deleteProperty(QScriptObject*, JSC::ExecState*,
-                                const JSC::Identifier& propertyName,
-                                bool checkDontDelete = true);
-    virtual bool getPropertyAttributes(const QScriptObject*, JSC::ExecState*,
-                                       const JSC::Identifier&, unsigned&) const;
+                                const JSC::Identifier& propertyName);
     virtual void getOwnPropertyNames(QScriptObject*, JSC::ExecState*, JSC::PropertyNameArray&,
-                                     bool includeNonEnumerable = false);
+                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
     virtual void markChildren(QScriptObject*, JSC::MarkStack& markStack);
     virtual JSC::CallType getCallData(QScriptObject*, JSC::CallData&);
     virtual JSC::ConstructType getConstructData(QScriptObject*, JSC::ConstructData&);
diff --git a/src/script/bridge/qscriptqobject.cpp b/src/script/bridge/qscriptqobject.cpp
index 6c401f8..765e074 100644
--- a/src/script/bridge/qscriptqobject.cpp
+++ b/src/script/bridge/qscriptqobject.cpp
@@ -537,40 +537,43 @@ static JSC::JSValue callQtMethod(JSC::ExecState *exec, QMetaMethod::MethodType c
                 continue;
         }
 
+        QList<QByteArray> parameterTypeNames = method.parameterTypes();
+
         QVector<QScriptMetaType> types;
+        types.resize(1 + parameterTypeNames.size());
+        QScriptMetaType *typesData = types.data();
         // resolve return type
         QByteArray returnTypeName = method.typeName();
         int rtype = QMetaType::type(returnTypeName);
         if ((rtype == 0) && !returnTypeName.isEmpty()) {
             int enumIndex = indexOfMetaEnum(meta, returnTypeName);
             if (enumIndex != -1)
-                types.append(QScriptMetaType::metaEnum(enumIndex, returnTypeName));
+                typesData[0] = QScriptMetaType::metaEnum(enumIndex, returnTypeName);
             else
-                types.append(QScriptMetaType::unresolved(returnTypeName));
+                typesData[0] = QScriptMetaType::unresolved(returnTypeName);
         } else {
             if (callType == QMetaMethod::Constructor)
-                types.append(QScriptMetaType::metaType(QMetaType::QObjectStar, "QObject*"));
+                typesData[0] = QScriptMetaType::metaType(QMetaType::QObjectStar, "QObject*");
             else if (rtype == QMetaType::QVariant)
-                types.append(QScriptMetaType::variant());
+                typesData[0] = QScriptMetaType::variant();
             else
-                types.append(QScriptMetaType::metaType(rtype, returnTypeName));
+                typesData[0] = QScriptMetaType::metaType(rtype, returnTypeName);
         }
 
         // resolve argument types
-        QList<QByteArray> parameterTypeNames = method.parameterTypes();
         for (int i = 0; i < parameterTypeNames.count(); ++i) {
             QByteArray argTypeName = parameterTypeNames.at(i);
             int atype = QMetaType::type(argTypeName);
             if (atype == 0) {
                 int enumIndex = indexOfMetaEnum(meta, argTypeName);
                 if (enumIndex != -1)
-                    types.append(QScriptMetaType::metaEnum(enumIndex, argTypeName));
+                    typesData[1 + i] = QScriptMetaType::metaEnum(enumIndex, argTypeName);
                 else
-                    types.append(QScriptMetaType::unresolved(argTypeName));
+                    typesData[1 + i] = QScriptMetaType::unresolved(argTypeName);
             } else if (atype == QMetaType::QVariant) {
-                types.append(QScriptMetaType::variant());
+                typesData[1 + i] = QScriptMetaType::variant();
             } else {
-                types.append(QScriptMetaType::metaType(atype, argTypeName));
+                typesData[1 + i] = QScriptMetaType::metaType(atype, argTypeName);
             }
         }
 
@@ -1298,7 +1301,7 @@ bool QObjectDelegate::getOwnPropertyDescriptor(QScriptObject *object, JSC::ExecS
                                          const JSC::Identifier &propertyName,
                                          JSC::PropertyDescriptor &descriptor)
 {
-    //Note: this has to be kept in sync with getOwnPropertySlot abd getPropertyAttributes
+    //Note: this has to be kept in sync with getOwnPropertySlot
 #ifndef QT_NO_PROPERTIES
     QByteArray name = convertToLatin1(propertyName.ustring());
     QObject *qobject = data->value;
@@ -1528,8 +1531,7 @@ void QObjectDelegate::put(QScriptObject *object, JSC::ExecState* exec,
 }
 
 bool QObjectDelegate::deleteProperty(QScriptObject *object, JSC::ExecState *exec,
-                                     const JSC::Identifier& propertyName,
-                                     bool checkDontDelete)
+                                     const JSC::Identifier& propertyName)
 {
 #ifndef QT_NO_PROPERTIES
     QByteArray name = convertToLatin1(propertyName.ustring());
@@ -1569,86 +1571,7 @@ bool QObjectDelegate::deleteProperty(QScriptObject *object, JSC::ExecState *exec
         return true;
     }
 
-    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName, checkDontDelete);
-#else //QT_NO_PROPERTIES
-    return false;
-#endif //QT_NO_PROPERTIES
-}
-
-bool QObjectDelegate::getPropertyAttributes(const QScriptObject *object,
-                                            JSC::ExecState *exec,
-                                            const JSC::Identifier &propertyName,
-                                            unsigned &attributes) const
-{
-#ifndef QT_NO_PROPERTIES
-    //Note: this has to be kept in sync with getOwnPropertyDescriptor and getOwnPropertySlot
-    QByteArray name = convertToLatin1(propertyName.ustring());
-    QObject *qobject = data->value;
-    if (!qobject)
-        return false;
-
-    const QScriptEngine::QObjectWrapOptions &opt = data->options;
-    const QMetaObject *meta = qobject->metaObject();
-    int index = -1;
-    if (name.contains('(')) {
-        QByteArray normalized = QMetaObject::normalizedSignature(name);
-        if (-1 != (index = meta->indexOfMethod(normalized))) {
-            QMetaMethod method = meta->method(index);
-            if (hasMethodAccess(method, index, opt)) {
-                if (!(opt & QScriptEngine::ExcludeSuperClassMethods)
-                    || (index >= meta->methodOffset())) {
-                    attributes = QObjectMemberAttribute;
-                    if (opt & QScriptEngine::SkipMethodsInEnumeration)
-                        attributes |= JSC::DontEnum;
-                    return true;
-                }
-            }
-        }
-    }
-
-    index = meta->indexOfProperty(name);
-    if (index != -1) {
-        QMetaProperty prop = meta->property(index);
-        if (prop.isScriptable()) {
-            if (!(opt & QScriptEngine::ExcludeSuperClassProperties)
-                || (index >= meta->propertyOffset())) {
-                attributes = flagsForMetaProperty(prop);
-                return true;
-            }
-        }
-    }
-
-    index = qobject->dynamicPropertyNames().indexOf(name);
-    if (index != -1) {
-        attributes = QObjectMemberAttribute;
-        return true;
-    }
-
-    const int offset = (opt & QScriptEngine::ExcludeSuperClassMethods)
-                       ? meta->methodOffset() : 0;
-    for (index = meta->methodCount() - 1; index >= offset; --index) {
-        QMetaMethod method = meta->method(index);
-        if (hasMethodAccess(method, index, opt)
-            && methodNameEquals(method, name.constData(), name.length())) {
-            attributes = QObjectMemberAttribute;
-            if (opt & QScriptEngine::SkipMethodsInEnumeration)
-                attributes |= JSC::DontEnum;
-            return true;
-        }
-    }
-
-    if (!(opt & QScriptEngine::ExcludeChildObjects)) {
-        QList<QObject*> children = qobject->children();
-        for (index = 0; index < children.count(); ++index) {
-            QObject *child = children.at(index);
-            if (child->objectName() == (QString)(propertyName.ustring())) {
-                attributes = JSC::ReadOnly | JSC::DontDelete | JSC::DontEnum;
-                return true;
-            }
-        }
-    }
-
-    return QScriptObjectDelegate::getPropertyAttributes(object, exec, propertyName, attributes);
+    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName);
 #else //QT_NO_PROPERTIES
     return false;
 #endif //QT_NO_PROPERTIES
@@ -1656,7 +1579,7 @@ bool QObjectDelegate::getPropertyAttributes(const QScriptObject *object,
 
 void QObjectDelegate::getOwnPropertyNames(QScriptObject *object, JSC::ExecState *exec,
                                           JSC::PropertyNameArray &propertyNames,
-                                          bool includeNonEnumerable)
+                                          JSC::EnumerationMode mode)
 {
 #ifndef QT_NO_PROPERTIES
     QObject *qobject = data->value;
@@ -1701,7 +1624,7 @@ void QObjectDelegate::getOwnPropertyNames(QScriptObject *object, JSC::ExecState
         }
     }
 
-    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, includeNonEnumerable);
+    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, mode);
 #endif //QT_NO_PROPERTIES
 }
 
@@ -1884,6 +1807,39 @@ bool QMetaObjectWrapperObject::getOwnPropertySlot(
     return JSC::JSObject::getOwnPropertySlot(exec, propertyName, slot);
 }
 
+bool QMetaObjectWrapperObject::getOwnPropertyDescriptor(
+    JSC::ExecState* exec, const JSC::Identifier& propertyName,
+    JSC::PropertyDescriptor& descriptor)
+{
+    const QMetaObject *meta = data->value;
+    if (!meta)
+        return false;
+
+    if (propertyName == exec->propertyNames().prototype) {
+        descriptor.setDescriptor(data->ctor
+                                 ? data->ctor.get(exec, propertyName)
+                                 : data->prototype,
+                                 JSC::DontDelete | JSC::DontEnum);
+        return true;
+    }
+
+    QByteArray name = QString(propertyName.ustring()).toLatin1();
+
+    for (int i = 0; i < meta->enumeratorCount(); ++i) {
+        QMetaEnum e = meta->enumerator(i);
+        for (int j = 0; j < e.keyCount(); ++j) {
+            const char *key = e.key(j);
+            if (!qstrcmp(key, name.constData())) {
+                descriptor.setDescriptor(JSC::JSValue(exec, e.value(j)),
+                                         JSC::ReadOnly | JSC::DontDelete);
+                return true;
+            }
+        }
+    }
+
+    return JSC::JSObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
+}
+
 void QMetaObjectWrapperObject::put(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                                    JSC::JSValue value, JSC::PutPropertySlot &slot)
 {
@@ -1909,8 +1865,7 @@ void QMetaObjectWrapperObject::put(JSC::ExecState* exec, const JSC::Identifier&
 }
 
 bool QMetaObjectWrapperObject::deleteProperty(
-    JSC::ExecState *exec, const JSC::Identifier& propertyName,
-    bool checkDontDelete)
+    JSC::ExecState *exec, const JSC::Identifier& propertyName)
 {
     if (propertyName == exec->propertyNames().prototype)
         return false;
@@ -1925,36 +1880,12 @@ bool QMetaObjectWrapperObject::deleteProperty(
             }
         }
     }
-    return JSC::JSObject::deleteProperty(exec, propertyName, checkDontDelete);
-}
-
-bool QMetaObjectWrapperObject::getPropertyAttributes(JSC::ExecState *exec,
-                                                     const JSC::Identifier &propertyName,
-                                                     unsigned &attributes) const
-{
-    if (propertyName == exec->propertyNames().prototype) {
-        attributes = JSC::DontDelete;
-        return true;
-    }
-    const QMetaObject *meta = data->value;
-    if (meta) {
-        QByteArray name = convertToLatin1(propertyName.ustring());
-        for (int i = 0; i < meta->enumeratorCount(); ++i) {
-            QMetaEnum e = meta->enumerator(i);
-            for (int j = 0; j < e.keyCount(); ++j) {
-                if (!qstrcmp(e.key(j), name.constData())) {
-                    attributes = JSC::ReadOnly | JSC::DontDelete;
-                    return true;
-                }
-            }
-        }
-    }
-    return JSC::JSObject::getPropertyAttributes(exec, propertyName, attributes);
+    return JSC::JSObject::deleteProperty(exec, propertyName);
 }
 
 void QMetaObjectWrapperObject::getOwnPropertyNames(JSC::ExecState *exec,
                                                    JSC::PropertyNameArray &propertyNames,
-                                                   bool includeNonEnumerable)
+                                                   JSC::EnumerationMode mode)
 {
     const QMetaObject *meta = data->value;
     if (!meta)
@@ -1964,7 +1895,7 @@ void QMetaObjectWrapperObject::getOwnPropertyNames(JSC::ExecState *exec,
         for (int j = 0; j < e.keyCount(); ++j)
             propertyNames.add(JSC::Identifier(exec, e.key(j)));
     }
-    JSC::JSObject::getOwnPropertyNames(exec, propertyNames, includeNonEnumerable);
+    JSC::JSObject::getOwnPropertyNames(exec, propertyNames, mode);
 }
 
 void QMetaObjectWrapperObject::markChildren(JSC::MarkStack& markStack)
diff --git a/src/script/bridge/qscriptqobject_p.h b/src/script/bridge/qscriptqobject_p.h
index 8b05d6b..b82bcb7 100644
--- a/src/script/bridge/qscriptqobject_p.h
+++ b/src/script/bridge/qscriptqobject_p.h
@@ -86,14 +86,10 @@ public:
                      const JSC::Identifier& propertyName,
                      JSC::JSValue, JSC::PutPropertySlot&);
     virtual bool deleteProperty(QScriptObject*, JSC::ExecState*,
-                                const JSC::Identifier& propertyName,
-                                bool checkDontDelete = true);
-    virtual bool getPropertyAttributes(const QScriptObject*, JSC::ExecState*,
-                                       const JSC::Identifier&,
-                                       unsigned&) const;
+                                const JSC::Identifier& propertyName);
     virtual void getOwnPropertyNames(QScriptObject*, JSC::ExecState*,
                                      JSC::PropertyNameArray&,
-                                     bool includeNonEnumerable = false);
+                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
     virtual void markChildren(QScriptObject*, JSC::MarkStack& markStack);
     virtual bool compareToObject(QScriptObject*, JSC::ExecState*, JSC::JSObject*);
 
@@ -275,15 +271,15 @@ public:
     virtual bool getOwnPropertySlot(JSC::ExecState*,
                                     const JSC::Identifier& propertyName,
                                     JSC::PropertySlot&);
+    virtual bool getOwnPropertyDescriptor(JSC::ExecState*,
+                                          const JSC::Identifier& propertyName,
+                                          JSC::PropertyDescriptor&);
     virtual void put(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                      JSC::JSValue, JSC::PutPropertySlot&);
     virtual bool deleteProperty(JSC::ExecState*,
-                                const JSC::Identifier& propertyName,
-                                bool checkDontDelete = true);
-    virtual bool getPropertyAttributes(JSC::ExecState*, const JSC::Identifier&,
-                                       unsigned&) const;
+                                const JSC::Identifier& propertyName);
     virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&,
-                                     bool includeNonEnumerable = false);
+                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
     virtual void markChildren(JSC::MarkStack& markStack);
 
     virtual JSC::CallType getCallData(JSC::CallData&);
@@ -303,10 +299,12 @@ public:
 
     static WTF::PassRefPtr<JSC::Structure> createStructure(JSC::JSValue prototype)
     {
-        return JSC::Structure::create(prototype, JSC::TypeInfo(JSC::ObjectType));
+        return JSC::Structure::create(prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags));
     }
 
 protected:
+    static const unsigned StructureFlags = JSC::OverridesGetOwnPropertySlot | JSC::OverridesMarkChildren | JSC::OverridesGetPropertyNames | JSObject::StructureFlags;
+
     Data *data;
 };
 
diff --git a/src/script/bridge/qscriptvariant.cpp b/src/script/bridge/qscriptvariant.cpp
index b4f0365..b2dd3b0 100644
--- a/src/script/bridge/qscriptvariant.cpp
+++ b/src/script/bridge/qscriptvariant.cpp
@@ -119,11 +119,8 @@ static JSC::JSValue JSC_HOST_CALL variantProtoFuncToString(JSC::ExecState *exec,
     JSC::JSValue value = variantProtoFuncValueOf(exec, callee, thisValue, args);
     if (value.isObject()) {
         result = v.toString();
-        if (result.isEmpty() && !v.canConvert(QVariant::String)) {
-            result = "QVariant(";
-            result += v.typeName();
-            result += ")";
-        }
+        if (result.isEmpty() && !v.canConvert(QVariant::String))
+            result = QString::fromLatin1("QVariant(%0)").arg(QString::fromLatin1(v.typeName()));
     } else {
         result = value.toString(exec);
     }
diff --git a/src/script/script.pro b/src/script/script.pro
index 771047a..f9ccfe4 100644
--- a/src/script/script.pro
+++ b/src/script/script.pro
@@ -39,6 +39,11 @@ wince* {
     LIBS += -lmmtimer
 }
 
+mac {
+    DEFINES += ENABLE_JSC_MULTIPLE_THREADS=0
+    LIBS_PRIVATE += -framework AppKit
+}
+
 include($$WEBKITDIR/JavaScriptCore/JavaScriptCore.pri)
 
 INCLUDEPATH += $$WEBKITDIR/JavaScriptCore