[OPENMP] Introduced type trait "__builtin_omp_required_simd_align" for default simd alignment.

Adds type trait "__builtin_omp_required_simd_align" after discussions here http://reviews.llvm.org/D9894
Differential Revision: http://reviews.llvm.org/D10597

llvm-svn: 241237

2 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index 330258b025b..856ad50d378 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -50,6 +50,7 @@ TargetInfo::TargetInfo(const llvm::Triple &T) : TargetOpts(), Triple(T) {
   LargeArrayAlign = 0;
   MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 0;
   MaxVectorAlign = 0;
+  SimdDefaultAlign = 0;
   SizeType = UnsignedLong;
   PtrDiffType = SignedLong;
   IntMaxType = SignedLongLong;
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 395f452ea83..4c593211d61 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -759,6 +759,7 @@ public:
       HasP8Crypto(false), HasDirectMove(false), HasQPX(false), HasHTM(false),
       HasBPERMD(false), HasExtDiv(false) {
     BigEndian = (Triple.getArch() != llvm::Triple::ppc64le);
+    SimdDefaultAlign = 128;
     LongDoubleWidth = LongDoubleAlign = 128;
     LongDoubleFormat = &llvm::APFloat::PPCDoubleDouble;
   }
@@ -2988,6 +2989,9 @@ bool X86TargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
     Features.erase(it);
   else if (SSELevel > NoSSE)
     MMX3DNowLevel = std::max(MMX3DNowLevel, MMX);
+
+  SimdDefaultAlign =
+      (getABI() == "avx512") ? 512 : (getABI() == "avx") ? 256 : 128;
   return true;
 }