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LoadStoreVectorizer: Use AA metadata

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This was not passing the full instruction with metadata
to the alias query.

llvm-svn: 274318
This commit is contained in:
Matt Arsenault
2016-07-01 01:47:46 +00:00
parent 1df1d1dcfc
commit 241f34cde8
2 changed files with 36 additions and 7 deletions
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11
llvm/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
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@@ -397,15 +397,12 @@ bool Vectorizer::isVectorizable(ArrayRef<Value *> Chain,
Instruction *M0 = cast<Instruction>(V);
Instruction *M1 = cast<Instruction>(VV);
Value *Ptr0 = getPointerOperand(M0);
Value *Ptr1 = getPointerOperand(M1);
unsigned S0 =
DL.getTypeStoreSize(Ptr0->getType()->getPointerElementType());
unsigned S1 =
DL.getTypeStoreSize(Ptr1->getType()->getPointerElementType());
if (AA.alias(MemoryLocation(Ptr0, S0), MemoryLocation(Ptr1, S1))) {
if (!AA.isNoAlias(MemoryLocation::get(M0), MemoryLocation::get(M1))) {
DEBUG(
Value *Ptr0 = getPointerOperand(M0);
Value *Ptr1 = getPointerOperand(M1);
dbgs() << "LSV: Found alias.\n"
" Aliasing instruction and pointer:\n"
<< *V << " aliases " << *Ptr0 << '\n'