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56e1394c88
directory. These passes are already defined in the IR library, and it doesn't make any sense to have the headers in Analysis. Long term, I think there is going to be a much better way to divide these matters. The dominators code should be fully separated into the abstract graph algorithm and have that put in Support where it becomes obvious that evn Clang's CFGBlock's can use it. Then the verifier can manually construct dominance information from the Support-driven interface while the Analysis library can provide a pass which both caches, reconstructs, and supports a nice update API. But those are very long term, and so I don't want to leave the really confusing structure until that day arrives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199082 91177308-0d34-0410-b5e6-96231b3b80d8
118 lines
3.2 KiB
C++
118 lines
3.2 KiB
C++
//=- llvm/Analysis/PostDominators.h - Post Dominator Calculation-*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file exposes interfaces to post dominance information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_POSTDOMINATORS_H
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#define LLVM_ANALYSIS_POSTDOMINATORS_H
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#include "llvm/IR/Dominators.h"
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namespace llvm {
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/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
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/// compute the a post-dominator tree.
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///
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struct PostDominatorTree : public FunctionPass {
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static char ID; // Pass identification, replacement for typeid
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DominatorTreeBase<BasicBlock>* DT;
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PostDominatorTree() : FunctionPass(ID) {
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initializePostDominatorTreePass(*PassRegistry::getPassRegistry());
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DT = new DominatorTreeBase<BasicBlock>(true);
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}
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~PostDominatorTree();
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virtual bool runOnFunction(Function &F);
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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inline const std::vector<BasicBlock*> &getRoots() const {
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return DT->getRoots();
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}
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inline DomTreeNode *getRootNode() const {
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return DT->getRootNode();
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}
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inline DomTreeNode *operator[](BasicBlock *BB) const {
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return DT->getNode(BB);
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}
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inline DomTreeNode *getNode(BasicBlock *BB) const {
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return DT->getNode(BB);
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}
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inline bool dominates(DomTreeNode* A, DomTreeNode* B) const {
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return DT->dominates(A, B);
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}
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inline bool dominates(const BasicBlock* A, const BasicBlock* B) const {
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return DT->dominates(A, B);
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}
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inline bool properlyDominates(const DomTreeNode* A, DomTreeNode* B) const {
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return DT->properlyDominates(A, B);
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}
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inline bool properlyDominates(BasicBlock* A, BasicBlock* B) const {
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return DT->properlyDominates(A, B);
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}
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inline BasicBlock *findNearestCommonDominator(BasicBlock *A, BasicBlock *B) {
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return DT->findNearestCommonDominator(A, B);
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}
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inline const BasicBlock *findNearestCommonDominator(const BasicBlock *A,
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const BasicBlock *B) {
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return DT->findNearestCommonDominator(A, B);
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}
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/// Get all nodes post-dominated by R, including R itself.
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void getDescendants(BasicBlock *R,
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SmallVectorImpl<BasicBlock *> &Result) const {
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DT->getDescendants(R, Result);
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}
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virtual void releaseMemory() {
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DT->releaseMemory();
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}
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virtual void print(raw_ostream &OS, const Module*) const;
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};
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FunctionPass* createPostDomTree();
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template <> struct GraphTraits<PostDominatorTree*>
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: public GraphTraits<DomTreeNode*> {
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static NodeType *getEntryNode(PostDominatorTree *DT) {
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return DT->getRootNode();
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}
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static nodes_iterator nodes_begin(PostDominatorTree *N) {
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if (getEntryNode(N))
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return df_begin(getEntryNode(N));
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else
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return df_end(getEntryNode(N));
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}
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static nodes_iterator nodes_end(PostDominatorTree *N) {
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return df_end(getEntryNode(N));
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}
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};
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} // End llvm namespace
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#endif
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