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AVX bugfix with alignment for store instructions.

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When replacing 'all on' masked store with regular store, set alignment 
to be the vector element alignment, not the alignment for a whole vector. 
(i.e. 4 or 8 byte alignment, not 32 or 64).
This commit is contained in:
Matt Pharr
2011-08-29 16:58:48 -07:00
parent 6de494cfdb
commit ad9e66650d
1 changed files with 5 additions and 1 deletions
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6
opt.cpp
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@@ -637,10 +637,14 @@ IntrinsicsOpt::runOnBasicBlock(llvm::BasicBlock &bb) {
llvm::PointerType::get(storeType, 0),
"ptr2vec", callInst);
lCopyMetadata(castPtr, callInst);
llvm::Instruction *storeInst =
llvm::StoreInst *storeInst =
new llvm::StoreInst(rvalue, castPtr, (llvm::Instruction *)NULL);
int align = callInst->getCalledFunction() == avxMaskedStore32 ? 4 : 8;
storeInst->setAlignment(align);
lCopyMetadata(storeInst, callInst);
llvm::ReplaceInstWithInst(callInst, storeInst);
modifiedAny = true;
goto restart;
}