diff options
| -rw-r--r-- | lib/Transforms/Scalar/GVNPRE.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/GVNPRE.cpp b/lib/Transforms/Scalar/GVNPRE.cpp index 7f76fa1073..d32939fe95 100644 --- a/lib/Transforms/Scalar/GVNPRE.cpp +++ b/lib/Transforms/Scalar/GVNPRE.cpp @@ -376,6 +376,8 @@ bool GVNPRE::runOnFunction(Function &F) { // Second Phase of BuildSets - calculate ANTIC_IN + std::set<BasicBlock*> visited; + bool changed = true; unsigned iterations = 0; while (changed) { @@ -388,6 +390,8 @@ bool GVNPRE::runOnFunction(Function &F) { PDI != E; ++PDI) { BasicBlock* BB = PDI->getBlock(); + visited.insert(BB); + std::set<Expression>& anticIn = anticipatedIn[BB]; std::set<Expression> old (anticIn.begin(), anticIn.end()); @@ -397,7 +401,7 @@ bool GVNPRE::runOnFunction(Function &F) { for (unsigned i = 0; i < BB->getTerminator()->getNumSuccessors(); ++i) { BasicBlock* currSucc = BB->getTerminator()->getSuccessor(i); std::set<Expression> temp; - if (i == 0) + if (visted.find(currSucc) == visited.end()) temp.insert(maximalSet.begin(), maximalSet.end()); else temp.insert(anticIn.begin(), anticIn.end()); |