diff options
| -rw-r--r-- | llvm/lib/Transforms/Scalar/GVN.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp index a7cc9049cdd..a4c07160249 100644 --- a/llvm/lib/Transforms/Scalar/GVN.cpp +++ b/llvm/lib/Transforms/Scalar/GVN.cpp @@ -1580,6 +1580,7 @@ bool GVN::processNonLocalLoad(LoadInst *LI, for (unsigned i = 0, e = UnavailableBlocks.size(); i != e; ++i) FullyAvailableBlocks[UnavailableBlocks[i]] = false; + bool NeedToSplitEdges = false; for (pred_iterator PI = pred_begin(LoadBB), E = pred_end(LoadBB); PI != E; ++PI) { BasicBlock *Pred = *PI; @@ -1596,9 +1597,11 @@ bool GVN::processNonLocalLoad(LoadInst *LI, } unsigned SuccNum = GetSuccessorNumber(Pred, LoadBB); toSplit.push_back(std::make_pair(Pred->getTerminator(), SuccNum)); - return false; + NeedToSplitEdges = true; } } + if (NeedToSplitEdges) + return false; // Decide whether PRE is profitable for this load. unsigned NumUnavailablePreds = PredLoads.size(); |
