114 lines
4.0 KiB
C++
114 lines
4.0 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/Support/Compiler.h"
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namespace llvm {
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extern template class LLVM_TEMPLATE_ABI
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DominatorTreeBase<MachineBasicBlock, true>; // PostDomTree
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namespace DomTreeBuilder {
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using MBBPostDomTree = PostDomTreeBase<MachineBasicBlock>;
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using MBBPostDomTreeGraphDiff = GraphDiff<MachineBasicBlock *, true>;
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extern template LLVM_TEMPLATE_ABI void
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Calculate<MBBPostDomTree>(MBBPostDomTree &DT);
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extern template LLVM_TEMPLATE_ABI void
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InsertEdge<MBBPostDomTree>(MBBPostDomTree &DT, MachineBasicBlock *From,
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MachineBasicBlock *To);
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extern template LLVM_TEMPLATE_ABI void
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DeleteEdge<MBBPostDomTree>(MBBPostDomTree &DT, MachineBasicBlock *From,
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MachineBasicBlock *To);
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extern template LLVM_TEMPLATE_ABI void
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ApplyUpdates<MBBPostDomTree>(MBBPostDomTree &DT, MBBPostDomTreeGraphDiff &,
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MBBPostDomTreeGraphDiff *);
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extern template LLVM_TEMPLATE_ABI bool
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Verify<MBBPostDomTree>(const MBBPostDomTree &DT,
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MBBPostDomTree::VerificationLevel VL);
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} // namespace DomTreeBuilder
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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 PostDomTreeBase<MachineBasicBlock> {
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using Base = PostDomTreeBase<MachineBasicBlock>;
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public:
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MachinePostDominatorTree() = default;
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explicit MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
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/// Handle invalidation explicitly.
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LLVM_ABI bool invalidate(MachineFunction &, const PreservedAnalyses &PA,
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MachineFunctionAnalysisManager::Invalidator &);
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/// Make findNearestCommonDominator(const NodeT *A, const NodeT *B) available.
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using Base::findNearestCommonDominator;
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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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LLVM_ABI MachineBasicBlock *
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findNearestCommonDominator(ArrayRef<MachineBasicBlock *> Blocks) const;
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};
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class MachinePostDominatorTreeAnalysis
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: public AnalysisInfoMixin<MachinePostDominatorTreeAnalysis> {
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friend AnalysisInfoMixin<MachinePostDominatorTreeAnalysis>;
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LLVM_ABI static AnalysisKey Key;
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public:
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using Result = MachinePostDominatorTree;
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LLVM_ABI Result run(MachineFunction &MF,
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MachineFunctionAnalysisManager &MFAM);
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};
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class MachinePostDominatorTreePrinterPass
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: public RequiredPassInfoMixin<MachinePostDominatorTreePrinterPass> {
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raw_ostream &OS;
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public:
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explicit MachinePostDominatorTreePrinterPass(raw_ostream &OS) : OS(OS) {}
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LLVM_ABI PreservedAnalyses run(MachineFunction &MF,
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MachineFunctionAnalysisManager &MFAM);
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};
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class LLVM_ABI MachinePostDominatorTreeWrapperPass
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: public MachineFunctionPass {
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std::optional<MachinePostDominatorTree> PDT;
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public:
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static char ID;
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MachinePostDominatorTreeWrapperPass();
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MachinePostDominatorTree &getPostDomTree() { return *PDT; }
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const MachinePostDominatorTree &getPostDomTree() const { return *PDT; }
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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(); }
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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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