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Do not preserve ETForest.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37506 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2007-06-08 00:02:08 +00:00
parent 6ea7ac6a1e
commit f86a73cbef
2 changed files with 14 additions and 35 deletions
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31
lib/Transforms/Utils/BreakCriticalEdges.cpp
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@@ -40,7 +40,6 @@ namespace {
virtual bool runOnFunction(Function &F);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addPreserved<ETForest>();
AU.addPreserved<DominatorTree>();
AU.addPreserved<DominanceFrontier>();
AU.addPreserved<LoopInfo>();
@@ -110,11 +109,11 @@ bool llvm::isCriticalEdge(const TerminatorInst *TI, unsigned SuccNum,
}
// SplitCriticalEdge - If this edge is a critical edge, insert a new node to
// split the critical edge. This will update ETForest, ImmediateDominator,
// DominatorTree, and DominatorFrontier information if it is available, thus
// calling this pass will not invalidate any of them. This returns true if
// the edge was split, false otherwise. This ensures that all edges to that
// dest go to one block instead of each going to a different block.
// split the critical edge. This will update DominatorTree, and DominatorFrontier
// information if it is available, thus calling this pass will not invalidate
// any of them. This returns true if the edge was split, false otherwise.
// This ensures that all edges to that dest go to one block instead of each
// going to a different block.
//
bool llvm::SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P,
bool MergeIdenticalEdges) {
@@ -181,26 +180,6 @@ bool llvm::SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P,
bool NewBBDominatesDestBB = true;
// Update the forest?
if (ETForest *EF = P->getAnalysisToUpdate<ETForest>()) {
// NewBB is dominated by TIBB.
EF->addNewBlock(NewBB, TIBB);
// If NewBBDominatesDestBB hasn't been computed yet, do so with EF.
if (!OtherPreds.empty()) {
while (!OtherPreds.empty() && NewBBDominatesDestBB) {
NewBBDominatesDestBB = EF->dominates(DestBB, OtherPreds.back());
OtherPreds.pop_back();
}
OtherPreds.clear();
}
// If NewBBDominatesDestBB, then NewBB dominates DestBB, otherwise it
// doesn't dominate anything.
if (NewBBDominatesDestBB)
EF->setImmediateDominator(DestBB, NewBB);
}
// Should we update DominatorTree information?
if (DominatorTree *DT = P->getAnalysisToUpdate<DominatorTree>()) {
DomTreeNode *TINode = DT->getNode(TIBB);