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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3105 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-07-26 18:40:14 +00:00
parent 0cbc6c2fd8
commit ce6ef112c4
7 changed files with 194 additions and 243 deletions
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17
lib/Transforms/Scalar/ADCE.cpp
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@@ -55,8 +55,8 @@ public:
// getAnalysisUsage - We require post dominance frontiers (aka Control
// Dependence Graph)
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired(DominatorTree::PostDomID);
AU.addRequired(DominanceFrontier::PostDomID);
AU.addRequired(PostDominatorTree::ID);
AU.addRequired(PostDominanceFrontier::ID);
}
@@ -93,13 +93,12 @@ void ADCE::markBlockAlive(BasicBlock *BB) {
// Mark the basic block as being newly ALIVE... and mark all branches that
// this block is control dependant on as being alive also...
//
DominanceFrontier &CDG =
getAnalysis<DominanceFrontier>(DominanceFrontier::PostDomID);
PostDominanceFrontier &CDG = getAnalysis<PostDominanceFrontier>();
DominanceFrontier::const_iterator It = CDG.find(BB);
PostDominanceFrontier::const_iterator It = CDG.find(BB);
if (It != CDG.end()) {
// Get the blocks that this node is control dependant on...
const DominanceFrontier::DomSetType &CDB = It->second;
const PostDominanceFrontier::DomSetType &CDB = It->second;
for_each(CDB.begin(), CDB.end(), // Mark all their terminators as live
bind_obj(this, &ADCE::markTerminatorLive));
}
@@ -191,7 +190,7 @@ bool ADCE::doADCE() {
// Find the first postdominator of the entry node that is alive. Make it the
// new entry node...
//
DominatorTree &DT = getAnalysis<DominatorTree>(DominatorTree::PostDomID);
PostDominatorTree &DT = getAnalysis<PostDominatorTree>();
// If there are some blocks dead...
if (AliveBlocks.size() != Func->size()) {
@@ -218,8 +217,8 @@ bool ADCE::doADCE() {
// postdominator that is alive, and the last postdominator that is
// dead...
//
DominatorTree::Node *LastNode = DT[TI->getSuccessor(i)];
DominatorTree::Node *NextNode = LastNode->getIDom();
PostDominatorTree::Node *LastNode = DT[TI->getSuccessor(i)];
PostDominatorTree::Node *NextNode = LastNode->getIDom();
while (!AliveBlocks.count(NextNode->getNode())) {
LastNode = NextNode;
NextNode = NextNode->getIDom();