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Re-fix a bug, where I was now being too aggressive.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37348 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-05-29 23:26:30 +00:00
parent cdf8efde6a
commit e3072b292f
1 changed files with 5 additions and 1 deletions
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6
lib/Transforms/Scalar/GVNPRE.cpp
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@ -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());