mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2026-08-27 04:01:25 -04:00
Carl Ritson
fb195f5ddf
Summary: Add getBase accessor so that underlying tree can be manipulated in a similar manner to MachineDominatorTree. Reviewers: kuhar, arsenm, hliao, nhaehnle Reviewed By: kuhar Subscribers: lkail, mgorny, hiraditya, wdng, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D77967
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
//===- llvm/CodeGen/MachinePostDominators.h ----------------------*- 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 for
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// target-specific code.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
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#define LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
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#include "llvm/CodeGen/MachineDominators.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include <memory>
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namespace llvm {
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///
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/// MachinePostDominatorTree - an analysis pass wrapper for DominatorTree
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/// used to compute the post-dominator tree for MachineFunctions.
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///
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class MachinePostDominatorTree : public MachineFunctionPass {
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using PostDomTreeT = PostDomTreeBase<MachineBasicBlock>;
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std::unique_ptr<PostDomTreeT> PDT;
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public:
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static char ID;
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MachinePostDominatorTree();
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PostDomTreeT &getBase() {
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if (!PDT)
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PDT.reset(new PostDomTreeT());
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return *PDT;
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}
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FunctionPass *createMachinePostDominatorTreePass();
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const SmallVectorImpl<MachineBasicBlock *> &getRoots() const {
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return PDT->getRoots();
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}
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MachineDomTreeNode *getRootNode() const { return PDT->getRootNode(); }
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MachineDomTreeNode *operator[](MachineBasicBlock *BB) const {
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return PDT->getNode(BB);
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}
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MachineDomTreeNode *getNode(MachineBasicBlock *BB) const {
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return PDT->getNode(BB);
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}
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bool dominates(const MachineDomTreeNode *A,
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const MachineDomTreeNode *B) const {
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return PDT->dominates(A, B);
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}
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bool dominates(const MachineBasicBlock *A, const MachineBasicBlock *B) const {
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return PDT->dominates(A, B);
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}
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bool properlyDominates(const MachineDomTreeNode *A,
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const MachineDomTreeNode *B) const {
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return PDT->properlyDominates(A, B);
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}
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bool properlyDominates(const MachineBasicBlock *A,
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const MachineBasicBlock *B) const {
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return PDT->properlyDominates(A, B);
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}
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bool isVirtualRoot(const MachineDomTreeNode *Node) const {
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return PDT->isVirtualRoot(Node);
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}
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MachineBasicBlock *findNearestCommonDominator(MachineBasicBlock *A,
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MachineBasicBlock *B) const {
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return PDT->findNearestCommonDominator(A, B);
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}
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/// Returns the nearest common dominator of the given blocks.
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/// If that tree node is a virtual root, a nullptr will be returned.
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MachineBasicBlock *
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findNearestCommonDominator(ArrayRef<MachineBasicBlock *> Blocks) const;
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bool runOnMachineFunction(MachineFunction &MF) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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void releaseMemory() override { PDT.reset(nullptr); }
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void verifyAnalysis() const override;
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void print(llvm::raw_ostream &OS, const Module *M = nullptr) const override;
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};
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} //end of namespace llvm
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#endif
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