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In the function InstCombiner::visitExtractElementInst() removed the limitation that extract is promoted over a cast only if the cast has only one use.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179786 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anat Shemer
2013-04-18 19:56:44 +00:00
parent 4bfeee1302
commit 86dc3f3739
2 changed files with 16 additions and 4 deletions
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8
lib/Transforms/InstCombine/InstCombineVectorOps.cpp
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@ -278,10 +278,10 @@ Instruction *InstCombiner::visitExtractElementInst(ExtractElementInst &EI) {
} else if (CastInst *CI = dyn_cast<CastInst>(I)) {
// Canonicalize extractelement(cast) -> cast(extractelement)
// bitcasts can change the number of vector elements and they cost nothing
if (CI->hasOneUse() && EI.hasOneUse() &&
(CI->getOpcode() != Instruction::BitCast)) {
Value *EE = Builder->CreateExtractElement(CI->getOperand(0),
EI.getIndexOperand());
if (CI->hasOneUse() && (CI->getOpcode() != Instruction::BitCast)) {
Value *EE = InsertNewInstWith(
ExtractElementInst::Create(CI->getOperand(0), EI.getIndexOperand()),
*CI);
return CastInst::Create(CI->getOpcode(), EE, EI.getType());
}
}