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| author | Andrew Trick <atrick@apple.com> | 2012-03-26 18:03:16 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-03-26 18:03:16 +0000 |
| commit | 81748bc32092c75c61bb7cb34bfb5a616924e535 (patch) | |
| tree | 4c2a9a3eddec3369d36ebb4bcba088063d41b4a6 /lib/Transforms | |
| parent | f64282145ea517061471072df974c110b132ade9 (diff) | |
| download | external_llvm-81748bc32092c75c61bb7cb34bfb5a616924e535.zip external_llvm-81748bc32092c75c61bb7cb34bfb5a616924e535.tar.gz external_llvm-81748bc32092c75c61bb7cb34bfb5a616924e535.tar.bz2 | |
LSR cleanup: potential bug caught by PVS-Studio.
Thanks Andrey.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153451 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index c599603..60b7e62 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -2497,13 +2497,14 @@ void LSRInstance::ChainInstruction(Instruction *UserInst, Instruction *IVOper, for (Value::use_iterator UseIter = IVOper->use_begin(), UseEnd = IVOper->use_end(); UseIter != UseEnd; ++UseIter) { Instruction *OtherUse = dyn_cast<Instruction>(*UseIter); + if (!OtherUse || OtherUse == UserInst) + continue; if (SE.isSCEVable(OtherUse->getType()) && !isa<SCEVUnknown>(SE.getSCEV(OtherUse)) && IU.isIVUserOrOperand(OtherUse)) { continue; } - if (OtherUse && OtherUse != UserInst) - NearUsers.insert(OtherUse); + NearUsers.insert(OtherUse); } // Since this user is part of the chain, it's no longer considered a use |