unsigned PostDominatorTree::DFSPass(BasicBlock *V, unsigned N) {
std::vector<BasicBlock *> workStack;
- std::set<BasicBlock *> visited;
+ SmallPtrSet<BasicBlock *, 32> Visited;
workStack.push_back(V);
do {
InfoRec &CurVInfo = Info[currentBB];
// Visit each block only once.
- if (visited.insert(currentBB).second) {
+ if (Visited.insert(currentBB)) {
CurVInfo.Semi = ++N;
CurVInfo.Label = currentBB;
InfoRec &SuccVInfo = Info[*PI];
if (SuccVInfo.Semi == 0) {
SuccVInfo.Parent = currentBB;
- if (!visited.count(*PI)) {
+ if (!Visited.count(*PI)) {
workStack.push_back(*PI);
visitChild = true;
}