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[SimplifyIndVars] Shorten code by using SCEV helper [NFC] 

llvm-svn: 316709
This commit is contained in:
Philip Reames 2017-10-26 22:02:16 +00:00
parent d5dfb62de7
commit 29dd40b38e
1 changed files with 4 additions and 7 deletions
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11
llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
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@ -174,14 +174,11 @@ void SimplifyIndvar::eliminateIVComparison(ICmpInst *ICmp, Value *IVOperand) {
Pred = ICmpInst::getSwappedPredicate(Pred);
}
// Get the SCEVs for the ICmp operands.
const SCEV *S = SE->getSCEV(ICmp->getOperand(IVOperIdx));
const SCEV *X = SE->getSCEV(ICmp->getOperand(1 - IVOperIdx));
// Simplify unnecessary loops away.
// Get the SCEVs for the ICmp operands (in the specific context of the
// current loop)
const Loop *ICmpLoop = LI->getLoopFor(ICmp->getParent());
S = SE->getSCEVAtScope(S, ICmpLoop);
X = SE->getSCEVAtScope(X, ICmpLoop);
const SCEV *S = SE->getSCEVAtScope(ICmp->getOperand(IVOperIdx), ICmpLoop);
const SCEV *X = SE->getSCEVAtScope(ICmp->getOperand(1 - IVOperIdx), ICmpLoop);
ICmpInst::Predicate InvariantPredicate;
const SCEV *InvariantLHS, *InvariantRHS;