From fe1bb977eef136daecec0d5717fbd7379f139e8a Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 24 Feb 2015 16:23:45 -0500
Subject: Detect: Provide __float128 when simulating GNU compilers

GNU compilers provide a __float128 builtin type on Intel architectures.
When simulating such GNU compiler preprocessing, define a __float128
type with the expected size and alignment in case the translation unit
references it.
---
 src/Detect.cxx                              | 16 ++++++++++++++++
 test/CMakeLists.txt                         |  2 ++
 test/expect/gccxml.any.GNU-float128.xml.txt | 25 +++++++++++++++++++++++++
 test/expect/gccxml.c89.GNU-float128.xml.txt | 13 +++++++++++++
 test/input/GNU-float128.c                   |  1 +
 test/input/GNU-float128.cxx                 |  1 +
 6 files changed, 58 insertions(+)
 create mode 100644 test/expect/gccxml.any.GNU-float128.xml.txt
 create mode 100644 test/expect/gccxml.c89.GNU-float128.xml.txt
 create mode 100644 test/input/GNU-float128.c
 create mode 100644 test/input/GNU-float128.cxx

diff --git a/src/Detect.cxx b/src/Detect.cxx
index 70b6a74..d9d2607 100644
--- a/src/Detect.cxx
+++ b/src/Detect.cxx
@@ -67,6 +67,22 @@ static void fixPredefines(Options& opts)
       pd.erase(beg);
     }
   }
+
+  // Provide __float128 if simulating the actual GNU compiler.
+  if (pd.find("#define __GNUC__ ") != pd.npos &&
+      pd.find("#define __clang__ ") == pd.npos &&
+      pd.find("#define __INTEL_COMPILER ") == pd.npos &&
+      pd.find("#define __CUDACC__ ") == pd.npos &&
+      pd.find("#define __PGI ") == pd.npos &&
+      (pd.find("#define __i386__ ") != pd.npos ||
+       pd.find("#define __x86_64__ ") != pd.npos ||
+       pd.find("#define __ia64__ ") != pd.npos)) {
+    pd += "\n"
+      "typedef struct { "
+      "  char x[16] __attribute__((aligned(16))); "
+      "} __float128;\n"
+      ;
+  }
 }
 
 //----------------------------------------------------------------------------
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 1430dca..9febe91 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -259,10 +259,12 @@ endforeach()
 
 if(TEST_GNU_C)
   set(castxml_test_gccxml_extra_arguments --castxml-cc-gnu ${TEST_GNU_C})
+  castxml_test_gccxml_c(GNU-float128)
   unset(castxml_test_gccxml_extra_arguments)
 endif()
 
 if(TEST_GNU_CXX)
   set(castxml_test_gccxml_extra_arguments --castxml-cc-gnu ${TEST_GNU_CXX})
+  castxml_test_gccxml(GNU-float128)
   unset(castxml_test_gccxml_extra_arguments)
 endif()
diff --git a/test/expect/gccxml.any.GNU-float128.xml.txt b/test/expect/gccxml.any.GNU-float128.xml.txt
new file mode 100644
index 0000000..61b11fa
--- /dev/null
+++ b/test/expect/gccxml.any.GNU-float128.xml.txt
@@ -0,0 +1,25 @@
+^<\?xml version="1.0"\?>
+<GCC_XML[^>]*>
+  <Function id="_1" name="start" returns="_2" context="_3" location="f1:1" file="f1" line="1">
+    <Argument type="_2" location="f1:1" file="f1" line="1"/>
+  </Function>
+  <Typedef id="_2" name="__float128" type="_4" context="_3"/>
+  <Struct id="_4" name="" context="_3" members="_5 _6 _7 _8 _9"/>
+  <Field id="_5" name="x" type="_10" context="_4" access="public"/>
+  <Constructor id="_6" context="_4" access="public" location="f0:0" file="f0" line="0" inline="1" artificial="1"( throws="")?/>
+  <Constructor id="_7" context="_4" access="public" location="f0:0" file="f0" line="0" inline="1" artificial="1"( throws="")?>
+    <Argument type="_11"/>
+  </Constructor>
+  <OperatorMethod id="_8" name="=" returns="_12" context="_4" access="public" location="f0:0" file="f0" line="0" inline="1" artificial="1"( throws="")?>
+    <Argument type="_11"/>
+  </OperatorMethod>
+  <Destructor id="_9" context="_4" access="public" location="f0:0" file="f0" line="0" inline="1" artificial="1"( throws="")?/>
+  <ArrayType id="_10" min="0" max="15" type="_13"/>
+  <ReferenceType id="_11" type="_4c"/>
+  <ReferenceType id="_12" type="_4"/>
+  <FundamentalType id="_13" name="char"/>
+  <Namespace id="_3" name="::"/>
+  <CvQualifiedType id="_4c" type="_4" const="1"/>
+  <File id="f0" name="&lt;builtin&gt;"/>
+  <File id="f1" name=".*/test/input/GNU-float128.cxx"/>
+</GCC_XML>$
diff --git a/test/expect/gccxml.c89.GNU-float128.xml.txt b/test/expect/gccxml.c89.GNU-float128.xml.txt
new file mode 100644
index 0000000..8195cff
--- /dev/null
+++ b/test/expect/gccxml.c89.GNU-float128.xml.txt
@@ -0,0 +1,13 @@
+^<\?xml version="1.0"\?>
+<GCC_XML[^>]*>
+  <Function id="_1" name="start" returns="_2" context="_3" location="f1:1" file="f1" line="1">
+    <Argument type="_2" location="f1:1" file="f1" line="1"/>
+  </Function>
+  <Typedef id="_2" name="__float128" type="_4" context="_3"/>
+  <Struct id="_4" name="" context="_3" members="_5"/>
+  <Field id="_5" name="x" type="_6" context="_4" access="public"/>
+  <ArrayType id="_6" min="0" max="15" type="_7"/>
+  <FundamentalType id="_7" name="char"/>
+  <Namespace id="_3" name="::"/>
+  <File id="f1" name=".*/test/input/GNU-float128.c"/>
+</GCC_XML>$
diff --git a/test/input/GNU-float128.c b/test/input/GNU-float128.c
new file mode 100644
index 0000000..fbb07e1
--- /dev/null
+++ b/test/input/GNU-float128.c
@@ -0,0 +1 @@
+__float128 start(__float128);
diff --git a/test/input/GNU-float128.cxx b/test/input/GNU-float128.cxx
new file mode 100644
index 0000000..fbb07e1
--- /dev/null
+++ b/test/input/GNU-float128.cxx
@@ -0,0 +1 @@
+__float128 start(__float128);
-- 
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