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| author | Andrew Trick <atrick@apple.com> | 2012-03-26 20:28:37 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-03-26 20:28:37 +0000 |
| commit | 14779cc49e88e07b334f118c10a861c96fc01350 (patch) | |
| tree | 24e429a0668b26aa69e8b9adfb0e73c7874f3f20 /llvm | |
| parent | 356a896394e05aa9ba6f7645d2450ca39a5c99fa (diff) | |
| download | bcm5719-llvm-14779cc49e88e07b334f118c10a861c96fc01350.tar.gz bcm5719-llvm-14779cc49e88e07b334f118c10a861c96fc01350.zip | |
LSR ivchain bug fix: corner case with ConstantExpr.
Fixes PR11950.
llvm-svn: 153463
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp index f2112446ade..7e71683dc1a 100644 --- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -704,8 +704,9 @@ static bool isHighCostExpansion(const SCEV *S, Value *UVal = U->getValue(); for (Value::use_iterator UI = UVal->use_begin(), UE = UVal->use_end(); UI != UE; ++UI) { - Instruction *User = cast<Instruction>(*UI); - if (User->getOpcode() == Instruction::Mul + // If U is a constant, it may be used by a ConstantExpr. + Instruction *User = dyn_cast<Instruction>(*UI); + if (User && User->getOpcode() == Instruction::Mul && SE.isSCEVable(User->getType())) { return SE.getSCEV(User) == Mul; } |
