diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp index a226865262e..ae0c84786e1 100644 --- a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp +++ b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp @@ -216,6 +216,14 @@ bool LoopIdiomRecognize::runOnCountableLoop() { << CurLoop->getHeader()->getName() << "\n"); bool MadeChange = false; + + // The following transforms hoist stores/memsets into the loop pre-header. + // Give up if the loop has instructions may throw. + LoopSafetyInfo SafetyInfo; + computeLoopSafetyInfo(&SafetyInfo, CurLoop); + if (SafetyInfo.MayThrow) + return MadeChange; + // Scan all the blocks in the loop that are not in subloops. for (auto *BB : CurLoop->getBlocks()) { // Ignore blocks in subloops. |
