124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
//===- LiveDebugVariables.h - Tracking debug info variables -----*- 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 provides the interface to the LiveDebugVariables analysis.
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//
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// The analysis removes DBG_VALUE instructions for virtual registers and tracks
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// live user variables in a data structure that can be updated during register
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// allocation.
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//
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// After register allocation new DBG_VALUE instructions are emitted to reflect
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// the new locations of user variables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
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#define LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/raw_ostream.h"
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#include <memory>
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namespace llvm {
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template <typename T> class ArrayRef;
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class LiveIntervals;
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class VirtRegMap;
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class LiveDebugVariables {
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public:
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class LDVImpl;
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LLVM_ABI LiveDebugVariables();
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LLVM_ABI ~LiveDebugVariables();
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LLVM_ABI LiveDebugVariables(LiveDebugVariables &&);
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LLVM_ABI void analyze(MachineFunction &MF, LiveIntervals *LIS);
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/// splitRegister - Move any user variables in OldReg to the live ranges in
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/// NewRegs where they are live. Mark the values as unavailable where no new
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/// register is live.
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LLVM_ABI void splitRegister(Register OldReg, ArrayRef<Register> NewRegs,
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LiveIntervals &LIS);
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/// emitDebugValues - Emit new DBG_VALUE instructions reflecting the changes
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/// that happened during register allocation.
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/// @param VRM Rename virtual registers according to map.
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LLVM_ABI void emitDebugValues(VirtRegMap *VRM);
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#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
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/// dump - Print data structures to dbgs().
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void dump() const;
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#endif
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LLVM_ABI void print(raw_ostream &OS) const;
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LLVM_ABI void releaseMemory();
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LLVM_ABI bool invalidate(MachineFunction &MF, const PreservedAnalyses &PA,
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MachineFunctionAnalysisManager::Invalidator &Inv);
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private:
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std::unique_ptr<LDVImpl> PImpl;
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};
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class LLVM_ABI LiveDebugVariablesWrapperLegacy : public MachineFunctionPass {
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std::unique_ptr<LiveDebugVariables> Impl;
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public:
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static char ID; // Pass identification, replacement for typeid
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LiveDebugVariablesWrapperLegacy();
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bool runOnMachineFunction(MachineFunction &) override;
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LiveDebugVariables &getLDV() { return *Impl; }
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const LiveDebugVariables &getLDV() const { return *Impl; }
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void releaseMemory() override {
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if (Impl)
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Impl->releaseMemory();
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}
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void getAnalysisUsage(AnalysisUsage &) const override;
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MachineFunctionProperties getSetProperties() const override {
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return MachineFunctionProperties().setTracksDebugUserValues();
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}
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};
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class LiveDebugVariablesAnalysis
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: public AnalysisInfoMixin<LiveDebugVariablesAnalysis> {
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friend AnalysisInfoMixin<LiveDebugVariablesAnalysis>;
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static AnalysisKey Key;
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public:
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using Result = LiveDebugVariables;
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MachineFunctionProperties getSetProperties() const {
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return MachineFunctionProperties().setTracksDebugUserValues();
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}
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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 LiveDebugVariablesPrinterPass
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: public RequiredPassInfoMixin<LiveDebugVariablesPrinterPass> {
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raw_ostream &OS;
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public:
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LiveDebugVariablesPrinterPass(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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} // end namespace llvm
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#endif // LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
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