Revert optimizations to QString::append

This reverts commit 03ac778172b783d26bb1c7c5d92bdedd045fcc92 and
 commit 02135be18f3c4b1d1525aff6dfe96c9c8521084d. They broke qt
on all platforms (e.g. qmake didn't compile on Windows any more).

2 files changed, 4 insertions, 42 deletions

diff --git a/src/corelib/tools/qlist.cpp b/src/corelib/tools/qlist.cpp
index a468c77..ac0dc46 100644
--- a/src/corelib/tools/qlist.cpp
+++ b/src/corelib/tools/qlist.cpp
@@ -154,19 +154,6 @@ QListData::Data *QListData::detach(int alloc)
 }
 
 /*!
- *  Detaches the QListData by allocating new memory for a list which will be bigger
- *  than the copied one and is expected to grow further.
- *  Returns the old (shared) data, it is up to the caller to deref() and free()
- *  For the new data node_copy needs to be called.
- *
- *  \internal
- */
-QListData::Data *QListData::detach_grow(int alloc)
-{
-    return detach(grow(alloc));
-}
-
-/*!
  *  Detaches the QListData by reallocating new memory.
  *  Returns the old (shared) data, it is up to the caller to deref() and free()
  *  For the new data node_copy needs to be called.
@@ -609,11 +596,6 @@ void **QListData::erase(void **xi)
     \internal
 */
 
-/*! \fn void QList::detach_grow(int alloc)
-
-    \internal
-*/
-
 /*! \fn void QList::detachShared()
 
     \internal
diff --git a/src/corelib/tools/qlist.h b/src/corelib/tools/qlist.h
index 84c7424..8c75c98 100644
--- a/src/corelib/tools/qlist.h
+++ b/src/corelib/tools/qlist.h
@@ -73,7 +73,6 @@ struct Q_CORE_EXPORT QListData {
     enum { DataHeaderSize = sizeof(Data) - sizeof(void *) };
 
     Data *detach(int alloc);
-    Data *detach_grow(int alloc);
     Data *detach(); // remove in 5.0
     Data *detach2(); // remove in 5.0
     Data *detach3(); // remove in 5.0
@@ -122,7 +121,6 @@ public:
     inline int size() const { return p.size(); }
 
     inline void detach() { if (d->ref != 1) detach_helper(); }
-    inline void detach_grow(int by) { if (d->ref != 1) detach_helper_grow(d->alloc + by); }
 
     inline void detachShared()
     {
@@ -335,7 +333,6 @@ public:
 #endif
 
 private:
-    void detach_helper_grow(int alloc);
     void detach_helper(int alloc);
     void detach_helper();
     void free(QListData::Data *d);
@@ -483,7 +480,7 @@ Q_OUTOFLINE_TEMPLATE void QList<T>::reserve(int alloc)
 template <typename T>
 Q_OUTOFLINE_TEMPLATE void QList<T>::append(const T &t)
 {
-    detach_grow(1);
+    detach();
     if (QTypeInfo<T>::isLarge || QTypeInfo<T>::isStatic) {
         Node *n = reinterpret_cast<Node *>(p.append());
         QT_TRY {
@@ -507,7 +504,7 @@ Q_OUTOFLINE_TEMPLATE void QList<T>::append(const T &t)
 template <typename T>
 inline void QList<T>::prepend(const T &t)
 {
-    detach_grow(1);
+    detach();
     if (QTypeInfo<T>::isLarge || QTypeInfo<T>::isStatic) {
         Node *n = reinterpret_cast<Node *>(p.prepend());
         QT_TRY {
@@ -531,7 +528,7 @@ inline void QList<T>::prepend(const T &t)
 template <typename T>
 inline void QList<T>::insert(int i, const T &t)
 {
-    detach_grow(1);
+    detach();
     if (QTypeInfo<T>::isLarge || QTypeInfo<T>::isStatic) {
         Node *n = reinterpret_cast<Node *>(p.insert(i));
         QT_TRY {
@@ -625,23 +622,6 @@ Q_OUTOFLINE_TEMPLATE T QList<T>::value(int i, const T& defaultValue) const
 }
 
 template <typename T>
-Q_OUTOFLINE_TEMPLATE void QList<T>::detach_helper_grow(int alloc)
-{
-    Node *n = reinterpret_cast<Node *>(p.begin());
-    QListData::Data *x = p.detach_grow(alloc);
-    QT_TRY {
-        node_copy(reinterpret_cast<Node *>(p.begin()), reinterpret_cast<Node *>(p.end()), n);
-    } QT_CATCH(...) {
-        qFree(d);
-        d = x;
-        QT_RETHROW;
-    }
-
-    if (!x->ref.deref())
-        free(x);
-}
-
-template <typename T>
 Q_OUTOFLINE_TEMPLATE void QList<T>::detach_helper(int alloc)
 {
     Node *n = reinterpret_cast<Node *>(p.begin());
@@ -750,7 +730,7 @@ Q_OUTOFLINE_TEMPLATE typename QList<T>::iterator QList<T>::erase(typename QList<
 template <typename T>
 Q_OUTOFLINE_TEMPLATE QList<T> &QList<T>::operator+=(const QList<T> &l)
 {
-    detach_grow(l.size());
+    detach();
     Node *n = reinterpret_cast<Node *>(p.append2(l.p));
     QT_TRY{
         node_copy(n, reinterpret_cast<Node *>(p.end()), reinterpret_cast<Node *>(l.p.begin()));