[Haiku] Support __float128 for Haiku x86 and x86_64

[kallisti5]

Summary

A revision on https://reviews.llvm.org/D53696 from another user.

[kristina]

LGTM. (Revision of D53696)

[kristina]

Let me know if you need this committed.

lib/Basic/Targets/OSTargets.h

260

One tiny style-related nitpick, no need for braces here, can just remove them after applying the patch.

[kallisti5]

Looks good to me. Could you commit for me? (no access)

Thanks!

lib/Basic/Targets/OSTargets.h

 class LLVM_LIBRARY_VISIBILITY HaikuTargetInfo : public OSTargetInfo<Target> {
 protected:
   void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
                     MacroBuilder &Builder) const override {
     // Haiku defines; list based off of gcc output
     Builder.defineMacro("__HAIKU__");
     Builder.defineMacro("__ELF__");
     DefineStd(Builder, "unix", Opts);
+    if (this->HasFloat128) {
+      Builder.defineMacro("__FLOAT128__");
+    }
   }
 
 public:
   HaikuTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
       : OSTargetInfo<Target>(Triple, Opts) {
     this->SizeType = TargetInfo::UnsignedLong;
     this->IntPtrType = TargetInfo::SignedLong;
     this->PtrDiffType = TargetInfo::SignedLong;
     this->ProcessIDType = TargetInfo::SignedLong;
     this->TLSSupported = false;
+    switch (Triple.getArch()) {
+    default:
+      break;
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      this->HasFloat128 = true;
+      break;
+    }
   }
 };
 
 // Minix Target
 template <typename Target>
 class LLVM_LIBRARY_VISIBILITY MinixTargetInfo : public OSTargetInfo<Target> {
 protected:
   void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,

test/CodeGenCXX/float128-declarations.cpp

 // RUN: %clang_cc1 -emit-llvm -triple i686-pc-openbsd -std=c++11 \
 // RUN:   %s -o - | FileCheck %s -check-prefix=CHECK-X86
 // RUN: %clang_cc1 -emit-llvm -triple amd64-pc-openbsd -std=c++11 \
 // RUN:   %s -o - | FileCheck %s -check-prefix=CHECK-X86
 // RUN: %clang_cc1 -emit-llvm -triple i386-pc-solaris2.11 -std=c++11 \
 // RUN:   %s -o - | FileCheck %s -check-prefix=CHECK-X86
 // RUN: %clang_cc1 -emit-llvm -triple x86_64-pc-solaris2.11 -std=c++11 \
 // RUN:   %s -o - | FileCheck %s -check-prefix=CHECK-X86
+// RUN: %clang_cc1 -emit-llvm -triple i586-pc-haiku -std=c++11 \
+// RUN:   %s -o - | FileCheck %s -check-prefix=CHECK-X86
+// RUN: %clang_cc1 -emit-llvm -triple x86_64-unknown-haiku -std=c++11 \
+// RUN:   %s -o - | FileCheck %s -check-prefix=CHECK-X86
 //
 /*  Various contexts where type __float128 can appear. The different check
     prefixes are due to different mangling on X86 and different calling
     convention on SystemZ. */
 
 /*  Namespace */
 namespace {
   __float128 f1n;