diff options
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp index fcbf9e301cf..ec3fed2f1ba 100644 --- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -400,10 +400,14 @@ bool LoopStrengthReduce::AddUsersIfInteresting(Instruction *I, Loop *L, SCEVHandle Stride = Start; if (!getSCEVStartAndStride(ISE, L, Start, Stride)) return false; // Non-reducible symbolic expression, bail out. - - for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E;++UI){ + + for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E;) { Instruction *User = cast<Instruction>(*UI); + // Increment iterator now because IVUseShouldUsePostIncValue may remove + // User from the list of I users. + ++UI; + // Do not infinitely recurse on PHI nodes. if (isa<PHINode>(User) && Processed.count(User)) continue; |
