diff options
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopDataPrefetch.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopDataPrefetch.cpp b/llvm/lib/Transforms/Scalar/LoopDataPrefetch.cpp index 0edceec8e13..5d0a5906509 100644 --- a/llvm/lib/Transforms/Scalar/LoopDataPrefetch.cpp +++ b/llvm/lib/Transforms/Scalar/LoopDataPrefetch.cpp @@ -99,9 +99,12 @@ bool LoopDataPrefetch::runOnFunction(Function &F) { AC = &getAnalysis<AssumptionCacheTracker>().getAssumptionCache(F); TTI = &getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F); + // If PrefetchDistance is not set, don't run the pass. This gives an + // opportunity for targets to run this pass for selected subtargets only + // (whose TTI sets PrefetchDistance). + if (TTI->getPrefetchDistance() == 0) + return false; assert(TTI->getCacheLineSize() && "Cache line size is not set for target"); - assert(TTI->getPrefetchDistance() && - "Prefetch distance is not set for target"); bool MadeChange = false; |
