diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/GVN.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp index 9189f41c19c..2995b1000a3 100644 --- a/llvm/lib/Transforms/Scalar/GVN.cpp +++ b/llvm/lib/Transforms/Scalar/GVN.cpp @@ -1225,6 +1225,7 @@ bool GVN::processBlock(DomTreeNode* DTN) { bool GVN::performPRE(Function& F) { bool changed = false; SmallVector<std::pair<TerminatorInst*, unsigned>, 4> toSplit; + DenseMap<BasicBlock*, Value*> predMap; for (df_iterator<BasicBlock*> DI = df_begin(&F.getEntryBlock()), DE = df_end(&F.getEntryBlock()); DI != DE; ++DI) { BasicBlock* CurrentBlock = *DI; @@ -1252,7 +1253,8 @@ bool GVN::performPRE(Function& F) { unsigned numWith = 0; unsigned numWithout = 0; BasicBlock* PREPred = 0; - DenseMap<BasicBlock*, Value*> predMap; + predMap.clear(); + for (pred_iterator PI = pred_begin(CurrentBlock), PE = pred_end(CurrentBlock); PI != PE; ++PI) { // We're not interested in PRE where the block is its @@ -1359,7 +1361,7 @@ bool GVN::performPRE(Function& F) { Instruction* erase = BI; BI++; - DEBUG(cerr << "GVN removed: " << *erase); + DEBUG(cerr << "GVN PRE removed: " << *erase); MD->removeInstruction(erase); erase->eraseFromParent(); changed = true; |
