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116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
//=- llvm/Analysis/PostDominators.h - Post Dominator Calculation --*- C++ -*-=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/ADT/DepthFirstIterator.h"
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#include "llvm/IR/Dominators.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Pass.h"
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namespace llvm {
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class Function;
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class raw_ostream;
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/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
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/// compute the post-dominator tree.
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class PostDominatorTree : public PostDomTreeBase<BasicBlock> {
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public:
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using Base = PostDomTreeBase<BasicBlock>;
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PostDominatorTree() = default;
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explicit PostDominatorTree(Function &F) { recalculate(F); }
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/// Handle invalidation explicitly.
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bool invalidate(Function &F, const PreservedAnalyses &PA,
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FunctionAnalysisManager::Invalidator &);
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};
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/// Analysis pass which computes a \c PostDominatorTree.
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class PostDominatorTreeAnalysis
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: public AnalysisInfoMixin<PostDominatorTreeAnalysis> {
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friend AnalysisInfoMixin<PostDominatorTreeAnalysis>;
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static AnalysisKey Key;
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public:
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/// Provide the result type for this analysis pass.
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using Result = PostDominatorTree;
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/// Run the analysis pass over a function and produce a post dominator
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/// tree.
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PostDominatorTree run(Function &F, FunctionAnalysisManager &);
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};
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/// Printer pass for the \c PostDominatorTree.
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class PostDominatorTreePrinterPass
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: public PassInfoMixin<PostDominatorTreePrinterPass> {
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raw_ostream &OS;
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public:
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explicit PostDominatorTreePrinterPass(raw_ostream &OS);
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PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
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};
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struct PostDominatorTreeWrapperPass : public FunctionPass {
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static char ID; // Pass identification, replacement for typeid
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PostDominatorTree DT;
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PostDominatorTreeWrapperPass() : FunctionPass(ID) {
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initializePostDominatorTreeWrapperPassPass(*PassRegistry::getPassRegistry());
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}
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PostDominatorTree &getPostDomTree() { return DT; }
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const PostDominatorTree &getPostDomTree() const { return DT; }
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bool runOnFunction(Function &F) override;
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void verifyAnalysis() const override;
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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void releaseMemory() override {
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DT.releaseMemory();
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}
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void print(raw_ostream &OS, const Module*) const override;
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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 NodeRef 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 namespace llvm
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#endif // LLVM_ANALYSIS_POSTDOMINATORS_H
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