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Don't assume that a store source is a vector type just because the destination is (PR26099)

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llvm-svn: 304465
This commit is contained in:
Simon Pilgrim
2017-06-01 20:13:34 +00:00
parent c784e96eac
commit a5dbbc6ead
2 changed files with 14 additions and 2 deletions
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4
clang/lib/CodeGen/CGExpr.cpp
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@@ -1487,9 +1487,9 @@ void CodeGenFunction::EmitStoreOfScalar(llvm::Value *Value, Address Addr,
// Handle vectors differently to get better performance.
if (Ty->isVectorType()) {
llvm::Type *SrcTy = Value->getType();
auto *VecTy = cast<llvm::VectorType>(SrcTy);
auto *VecTy = dyn_cast<llvm::VectorType>(SrcTy);
// Handle vec3 special.
if (VecTy->getNumElements() == 3) {
if (VecTy && VecTy->getNumElements() == 3) {
// Our source is a vec3, do a shuffle vector to make it a vec4.
llvm::Constant *Mask[] = {Builder.getInt32(0), Builder.getInt32(1),
Builder.getInt32(2),

12
clang/test/CodeGen/pr26099.c Normal file
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@@ -0,0 +1,12 @@
// RUN: %clang_cc1 -ffreestanding %s -triple=i686-apple-darwin -target-feature +mmx -emit-llvm -o - -Wall -Werror
// RUN: %clang_cc1 -ffreestanding %s -triple=x86_64-apple-darwin -target-feature +mmx -emit-llvm -o - -Wall -Werror
// REQUIRES: asserts
#include <x86intrin.h>
int __attribute__ ((__vector_size__ (8))) b;
void bar(int a)
{
b = __builtin_ia32_vec_init_v2si (0, a);
}