diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopStrengthReduce.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index e20fb16fb1..288dd476e9 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -2528,6 +2528,10 @@ bool LoopStrengthReduce::runOnLoop(Loop *L, LPPassManager &LPM) { SE = &getAnalysis<ScalarEvolution>(); Changed = false; + // If LoopSimplify form is not available, stay out of trouble. + if (!L->getLoopPreheader() || !L->getLoopLatch()) + return false; + if (!IU->IVUsesByStride.empty()) { DEBUG(errs() << "\nLSR on \"" << L->getHeader()->getParent()->getName() << "\" "; |