From 7919beaaf25dda94cec3cbdd17ba364dc4201795 Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Tue, 5 Jun 2012 19:40:46 +0000
Subject: Fix a bug with va_arg and vectors on Darwin x86-32. 
 <rdar://problem/11592208>.

llvm-svn: 158017
---
 clang/lib/CodeGen/TargetInfo.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'clang/lib/CodeGen/TargetInfo.cpp')

diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 357b3fe5374..34c7b428ed7 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -626,6 +626,10 @@ ABIArgInfo X86_32ABIInfo::classifyReturnType(QualType RetTy,
           ABIArgInfo::getExtend() : ABIArgInfo::getDirect());
 }
 
+static bool isSSEVectorType(ASTContext &Context, QualType Ty) {
+  return Ty->getAs<VectorType>() && Context.getTypeSize(Ty) == 128;
+}
+
 static bool isRecordWithSSEVectorType(ASTContext &Context, QualType Ty) {
   const RecordType *RT = Ty->getAs<RecordType>();
   if (!RT)
@@ -643,7 +647,7 @@ static bool isRecordWithSSEVectorType(ASTContext &Context, QualType Ty) {
        i != e; ++i) {
     QualType FT = i->getType();
 
-    if (FT->getAs<VectorType>() && Context.getTypeSize(FT) == 128)
+    if (isSSEVectorType(Context, FT))
       return true;
 
     if (isRecordWithSSEVectorType(Context, FT))
@@ -667,7 +671,8 @@ unsigned X86_32ABIInfo::getTypeStackAlignInBytes(QualType Ty,
   }
 
   // Otherwise, if the type contains an SSE vector type, the alignment is 16.
-  if (Align >= 16 && isRecordWithSSEVectorType(getContext(), Ty))
+  if (Align >= 16 && (isSSEVectorType(getContext(), Ty) ||
+                      isRecordWithSSEVectorType(getContext(), Ty)))
     return 16;
 
   return MinABIStackAlignInBytes;
-- 
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