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Don't treat values as signed when looking at loop steppings in HowForToNonZero.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51560 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2008-05-25 23:43:32 +00:00
parent 3dfd7bf511
commit 04b35e8532
2 changed files with 22 additions and 2 deletions
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4
lib/Analysis/ScalarEvolution.cpp
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@@ -2548,9 +2548,9 @@ SCEVHandle ScalarEvolutionsImpl::HowFarToZero(SCEV *V, const Loop *L) {
if (SCEVConstant *StartC = dyn_cast<SCEVConstant>(Start)) {
ConstantInt *StartCC = StartC->getValue();
Constant *StartNegC = ConstantExpr::getNeg(StartCC);
Constant *Rem = ConstantExpr::getSRem(StartNegC, StepC->getValue());
Constant *Rem = ConstantExpr::getURem(StartNegC, StepC->getValue());
if (Rem->isNullValue()) {
Constant *Result =ConstantExpr::getSDiv(StartNegC,StepC->getValue());
Constant *Result = ConstantExpr::getUDiv(StartNegC,StepC->getValue());
return SE.getUnknown(Result);
}
}