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| author | Dale Johannesen <dalej@apple.com> | 2008-04-18 21:38:31 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2008-04-18 21:38:31 +0000 |
| commit | 6d2a23e573e13973de286cc337ea6345e5d02a0a (patch) | |
| tree | 42a9e8c7210c3d0bf91be0b0c28e735f9d130604 | |
| parent | 688479740ba49f116496ec81879eb4e379c86bf7 (diff) | |
| download | external_llvm-6d2a23e573e13973de286cc337ea6345e5d02a0a.zip external_llvm-6d2a23e573e13973de286cc337ea6345e5d02a0a.tar.gz external_llvm-6d2a23e573e13973de286cc337ea6345e5d02a0a.tar.bz2 | |
Fix a scalar evolution bug. Reversing everything
does not work because of 0; 2>0 but -2U is also >0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49928 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 4b4b97e..0508bb7 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -1980,8 +1980,7 @@ SCEVHandle ScalarEvolutionsImpl::ComputeIterationCount(const Loop *L) { break; } case ICmpInst::ICMP_UGT: { - SCEVHandle TC = HowManyLessThans(SE.getNegativeSCEV(LHS), - SE.getNegativeSCEV(RHS), L, false); + SCEVHandle TC = HowFarToZero(SE.getMinusSCEV(LHS, RHS), L); if (!isa<SCEVCouldNotCompute>(TC)) return TC; break; } |