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LoopVectorize: Invert case when we use a vector cmp value to query select cost

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We generate a select with a vectorized condition argument when the condition is
NOT loop invariant. Not the other way around.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177098 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer
2013-03-14 18:54:36 +00:00
parent 862146b607
commit d517da33b7
2 changed files with 63 additions and 1 deletions
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2
lib/Transforms/Vectorize/LoopVectorize.cpp
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@@ -3338,7 +3338,7 @@ LoopVectorizationCostModel::getInstructionCost(Instruction *I, unsigned VF) {
const SCEV *CondSCEV = SE->getSCEV(SI->getCondition());
bool ScalarCond = (SE->isLoopInvariant(CondSCEV, TheLoop));
Type *CondTy = SI->getCondition()->getType();
if (ScalarCond)
if (!ScalarCond)
CondTy = VectorType::get(CondTy, VF);
return TTI.getCmpSelInstrCost(I->getOpcode(), VectorTy, CondTy);