diff options
Diffstat (limited to 'llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp index a7bc0e0b437..a0e41d9a977 100644 --- a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp +++ b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp @@ -173,6 +173,11 @@ static void deleteIfDeadInstruction(Value *V, ScalarEvolution &SE) { bool LoopIdiomRecognize::runOnLoop(Loop *L, LPPassManager &LPM) { CurLoop = L; + // Disable loop idiom recognition if the function's name is a common idiom. + StringRef Name = L->getHeader()->getParent()->getName(); + if (Name == "memset" || Name == "memcpy") + return false; + // The trip count of the loop must be analyzable. SE = &getAnalysis<ScalarEvolution>(); if (!SE->hasLoopInvariantBackedgeTakenCount(L)) |
