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(re)fix handling of UGT. Pointed out by Nick Lewycky.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49991 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2008-04-20 16:58:57 +00:00
parent 3eaee31393
commit a0c8fc6f28
1 changed files with 2 additions and 1 deletions
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3
lib/Analysis/ScalarEvolution.cpp
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@ -1980,7 +1980,8 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) {
break;
}
case ICmpInst::ICMP_UGT: {
SCEVHandle TC = HowFarToZero(SE.getMinusSCEV(LHS, RHS), L);
SCEVHandle TC = HowManyLessThans(SE.getNotSCEV(LHS),
SE.getNotSCEV(RHS), L, false);
if (!isa<SCEVCouldNotCompute>(TC)) return TC;
break;
}