Enable __float128 for mingw for GCC compatibility and define __SIZEOF_FLOAT128__...

GCC defines __FLOAT128__ on Power and __SIZEOF_FLOAT128__ on x86. We're
just following the inconsistency for now so users have some way to test.

Effectively merges this patch as requested by Martell Malone:
https://github.com/Alexpux/MINGW-packages/blob/master/mingw-w64-clang/0107-enable-__float128-for-X86-MinGW.patch

llvm-svn: 304012

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index b350338..636be1f 100644 (file)
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -4644,7 +4644,9 @@ static void addMinGWDefines(const LangOptions &Opts, MacroBuilder &Builder) {
 class MinGWX86_32TargetInfo : public WindowsX86_32TargetInfo {
 public:
   MinGWX86_32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
-      : WindowsX86_32TargetInfo(Triple, Opts) {}
+      : WindowsX86_32TargetInfo(Triple, Opts) {
+    HasFloat128 = true;
+  }
   void getTargetDefines(const LangOptions &Opts,
                         MacroBuilder &Builder) const override {
     WindowsX86_32TargetInfo::getTargetDefines(Opts, Builder);
@@ -4936,6 +4938,7 @@ public:
     // with x86 FP ops. Weird.
     LongDoubleWidth = LongDoubleAlign = 128;
     LongDoubleFormat = &llvm::APFloat::x87DoubleExtended();
+    HasFloat128 = true;
   }
 
   void getTargetDefines(const LangOptions &Opts,

diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 08befb3..fb788c4 100644 (file)
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -750,6 +750,8 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
                    TI.getTypeWidth(TI.getWIntType()), TI, Builder);
   if (TI.hasInt128Type())
     DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);
+  if (TI.hasFloat128Type())
+    DefineTypeSizeof("__SIZEOF_FLOAT128__", 128, TI, Builder);
 
   DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
   DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder);

diff --git a/clang/test/Sema/128bitfloat.cpp b/clang/test/Sema/128bitfloat.cpp
index 2449cb6..4a826b4 100644 (file)
--- a/clang/test/Sema/128bitfloat.cpp
+++ b/clang/test/Sema/128bitfloat.cpp
@@ -1,7 +1,11 @@
-// RUN: %clang_cc1 -fsyntax-only -verify -std=gnu++11 %s
-// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -verify -std=gnu++11 %s
+// RUN: %clang_cc1 -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple powerpc64-linux -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple i686-windows-gnu -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple x86_64-windows-gnu -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple x86_64-windows-msvc -verify -std=c++11 %s
 
-#ifdef __FLOAT128__
+#if defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__)
 __float128 f;
 template<typename> struct __is_floating_point_helper {};
 template<> struct __is_floating_point_helper<__float128> {};