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Do not use ETForest as well as DomiantorTree. DominatorTree is sufficient.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37501 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -142,6 +142,16 @@ protected:
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return getNode(BB);
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}
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/// getIDomBlock - return basic block BB's immediate domiantor basic block.
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///
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BasicBlock *getIDomBlock(BasicBlock *BB) {
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DomTreeNode *N = getNode(BB);
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assert (N && "Missing dominator tree node");
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DomTreeNode *I = N->getIDom();
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assert (N && "Missing immediate dominator");
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return I->getBlock();
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}
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/// getRootNode - This returns the entry node for the CFG of the function. If
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/// this tree represents the post-dominance relations for a function, however,
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/// this root may be a node with the block == NULL. This is the case when
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@ -24,13 +24,13 @@ namespace llvm {
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/// ExtractCodeRegion - rip out a sequence of basic blocks into a new function
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///
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Function* ExtractCodeRegion(ETForest &DS, DominatorTree& DT,
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Function* ExtractCodeRegion(DominatorTree& DT,
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const std::vector<BasicBlock*> &code,
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bool AggregateArgs = false);
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/// ExtractLoop - rip out a natural loop into a new function
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///
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Function* ExtractLoop(ETForest &DS, DominatorTree& DT, Loop *L,
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Function* ExtractLoop(DominatorTree& DT, Loop *L,
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bool AggregateArgs = false);
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/// ExtractBasicBlock - rip out a basic block into a new function
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@ -45,7 +45,6 @@ namespace {
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequiredID(BreakCriticalEdgesID);
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AU.addRequiredID(LoopSimplifyID);
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AU.addRequired<ETForest>();
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AU.addRequired<DominatorTree>();
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AU.addRequired<LoopInfo>();
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}
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@ -78,7 +77,6 @@ bool LoopExtractor::runOnFunction(Function &F) {
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if (LI.begin() == LI.end())
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return false;
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ETForest &EF = getAnalysis<ETForest>();
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DominatorTree &DT = getAnalysis<DominatorTree>();
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// If there is more than one top-level loop in this function, extract all of
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@ -88,7 +86,7 @@ bool LoopExtractor::runOnFunction(Function &F) {
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for (LoopInfo::iterator i = LI.begin(), e = LI.end(); i != e; ++i) {
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if (NumLoops == 0) return Changed;
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--NumLoops;
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Changed |= ExtractLoop(EF, DT, *i) != 0;
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Changed |= ExtractLoop(DT, *i) != 0;
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++NumExtracted;
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}
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} else {
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@ -118,7 +116,7 @@ bool LoopExtractor::runOnFunction(Function &F) {
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if (ShouldExtractLoop) {
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if (NumLoops == 0) return Changed;
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--NumLoops;
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Changed |= ExtractLoop(EF, DT, TLL) != 0;
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Changed |= ExtractLoop(DT, TLL) != 0;
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++NumExtracted;
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} else {
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// Okay, this function is a minimal container around the specified loop.
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@ -128,7 +126,7 @@ bool LoopExtractor::runOnFunction(Function &F) {
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for (Loop::iterator i = TLL->begin(), e = TLL->end(); i != e; ++i) {
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if (NumLoops == 0) return Changed;
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--NumLoops;
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Changed |= ExtractLoop(EF, DT, *i) != 0;
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Changed |= ExtractLoop(DT, *i) != 0;
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++NumExtracted;
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}
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}
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@ -44,14 +44,13 @@ namespace {
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class VISIBILITY_HIDDEN CodeExtractor {
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typedef std::vector<Value*> Values;
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std::set<BasicBlock*> BlocksToExtract;
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ETForest *EF;
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DominatorTree* DT;
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bool AggregateArgs;
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unsigned NumExitBlocks;
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const Type *RetTy;
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public:
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CodeExtractor(ETForest *ef = 0, DominatorTree* dt = 0, bool AggArgs = false)
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: EF(ef), DT(dt), AggregateArgs(AggArgs||AggregateArgsOpt), NumExitBlocks(~0U) {}
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CodeExtractor(DominatorTree* dt = 0, bool AggArgs = false)
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: DT(dt), AggregateArgs(AggArgs||AggregateArgsOpt), NumExitBlocks(~0U) {}
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Function *ExtractCodeRegion(const std::vector<BasicBlock*> &code);
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@ -141,17 +140,17 @@ void CodeExtractor::severSplitPHINodes(BasicBlock *&Header) {
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// Okay, update dominator sets. The blocks that dominate the new one are the
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// blocks that dominate TIBB plus the new block itself.
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if (EF) {
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BasicBlock* idom = EF->getIDom(OldPred);
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if (DT) {
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DomTreeNode *OPNode = DT->getNode(OldPred);
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DomTreeNode *IDomNode = OPNode->getIDom();
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BasicBlock* idom = IDomNode->getBlock();
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DT->addNewBlock(NewBB, idom);
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EF->addNewBlock(NewBB, idom);
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// Additionally, NewBB replaces OldPred as the immediate dominator of blocks
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Function *F = Header->getParent();
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for (Function::iterator I = F->begin(), E = F->end(); I != E; ++I)
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if (EF->getIDom(I) == OldPred) {
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if (DT->getIDomBlock(I) == OldPred) {
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DT->changeImmediateDominator(I, NewBB);
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EF->setImmediateDominator(I, NewBB);
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}
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}
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@ -509,12 +508,12 @@ emitCallAndSwitchStatement(Function *newFunction, BasicBlock *codeReplacer,
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// In the extract block case, if the block we are extracting ends
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// with an invoke instruction, make sure that we don't emit a
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// store of the invoke value for the unwind block.
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if (!EF && DefBlock != OldTarget)
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if (!DT && DefBlock != OldTarget)
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DominatesDef = false;
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}
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if (EF)
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DominatesDef = EF->dominates(DefBlock, OldTarget);
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if (DT)
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DominatesDef = DT->dominates(DefBlock, OldTarget);
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if (DominatesDef) {
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if (AggregateArgs) {
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@ -728,16 +727,16 @@ bool CodeExtractor::isEligible(const std::vector<BasicBlock*> &code) {
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/// ExtractCodeRegion - slurp a sequence of basic blocks into a brand new
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/// function
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///
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Function* llvm::ExtractCodeRegion(ETForest &EF, DominatorTree &DT,
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Function* llvm::ExtractCodeRegion(DominatorTree &DT,
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const std::vector<BasicBlock*> &code,
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bool AggregateArgs) {
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return CodeExtractor(&EF, &DT, AggregateArgs).ExtractCodeRegion(code);
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return CodeExtractor(&DT, AggregateArgs).ExtractCodeRegion(code);
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}
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/// ExtractBasicBlock - slurp a natural loop into a brand new function
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///
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Function* llvm::ExtractLoop(ETForest &EF, DominatorTree &DF, Loop *L, bool AggregateArgs) {
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return CodeExtractor(&EF, &DF, AggregateArgs).ExtractCodeRegion(L->getBlocks());
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Function* llvm::ExtractLoop(DominatorTree &DT, Loop *L, bool AggregateArgs) {
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return CodeExtractor(&DT, AggregateArgs).ExtractCodeRegion(L->getBlocks());
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}
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/// ExtractBasicBlock - slurp a basic block into a brand new function
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@ -745,5 +744,5 @@ Function* llvm::ExtractLoop(ETForest &EF, DominatorTree &DF, Loop *L, bool Aggre
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Function* llvm::ExtractBasicBlock(BasicBlock *BB, bool AggregateArgs) {
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std::vector<BasicBlock*> Blocks;
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Blocks.push_back(BB);
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return CodeExtractor(0, 0, AggregateArgs).ExtractCodeRegion(Blocks);
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return CodeExtractor(0, AggregateArgs).ExtractCodeRegion(Blocks);
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}
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