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[msan] Fix handling of vectors of pointers.

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VectorType::getInteger() can not be used with them, because pointer size
depends on the target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171070 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov 2012-12-25 16:04:38 +00:00
parent 6607716368
commit 59a65f7b24
2 changed files with 22 additions and 2 deletions
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9
lib/Transforms/Instrumentation/MemorySanitizer.cpp
View File

@ -541,8 +541,11 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
// This may return weird-sized types like i1.
if (IntegerType *IT = dyn_cast<IntegerType>(OrigTy))
return IT;
if (VectorType *VT = dyn_cast<VectorType>(OrigTy))
return VectorType::getInteger(VT);
if (VectorType *VT = dyn_cast<VectorType>(OrigTy)) {
uint32_t EltSize = MS.TD->getTypeStoreSizeInBits(VT->getElementType());
return VectorType::get(IntegerType::get(*MS.C, EltSize),
VT->getNumElements());
}
if (StructType *ST = dyn_cast<StructType>(OrigTy)) {
SmallVector<Type*, 4> Elements;
for (unsigned i = 0, n = ST->getNumElements(); i < n; i++)
@ -1023,6 +1026,8 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
}
size_t VectorOrPrimitiveTypeSizeInBits(Type *Ty) {
assert(!(Ty->isVectorTy() && Ty->getScalarType()->isPointerTy()) &&
"Vector of pointers is not a valid shadow type");
return Ty->isVectorTy() ?
Ty->getVectorNumElements() * Ty->getScalarSizeInBits() :
Ty->getPrimitiveSizeInBits();

15
test/Instrumentation/MemorySanitizer/msan_basic.ll
View File

@ -512,3 +512,18 @@ declare <8 x i16> @llvm.x86.sse2.padds.w(<8 x i16> %a, <8 x i16> %b) nounwind
; CHECK-ORIGINS: call <8 x i16> @llvm.x86.sse2.padds.w
; CHECK-ORIGINS: store i32 {{.*}} @__msan_retval_origin_tls
; CHECK-ORIGINS: ret <8 x i16>
; Test handling of vectors of pointers.
; Check that shadow of such vector is a vector of integers.
define <8 x i8*> @VectorOfPointers(<8 x i8*>* %p) nounwind uwtable {
%x = load <8 x i8*>* %p
ret <8 x i8*> %x
}
; CHECK: @VectorOfPointers
; CHECK: load <8 x i64>*
; CHECK: load <8 x i8*>*
; CHECK: store <8 x i64> {{.*}} @__msan_retval_tls
; CHECK: ret <8 x i8*>