51 lines
2.1 KiB
C
51 lines
2.1 KiB
C
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//===----- llvm/CodeGen/GlobalISel/LostDebugLocObserver.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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/// Tracks DebugLocs between checkpoints and verifies that they are transferred.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_GLOBALISEL_LOSTDEBUGLOCOBSERVER_H
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#define LLVM_CODEGEN_GLOBALISEL_LOSTDEBUGLOCOBSERVER_H
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
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namespace llvm {
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class LostDebugLocObserver : public GISelChangeObserver {
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StringRef DebugType;
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SmallSet<DebugLoc, 4> LostDebugLocs;
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SmallPtrSet<MachineInstr *, 4> PotentialMIsForDebugLocs;
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unsigned NumLostDebugLocs = 0;
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public:
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LostDebugLocObserver(StringRef DebugType) : DebugType(DebugType) {}
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unsigned getNumLostDebugLocs() const { return NumLostDebugLocs; }
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/// Call this to indicate that it's a good point to assess whether locations
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/// have been lost. Typically this will be when a logical change has been
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/// completed such as the caller has finished replacing some instructions with
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/// alternatives. When CheckDebugLocs is true, the locations will be checked
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/// to see if any have been lost since the last checkpoint. When
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/// CheckDebugLocs is false, it will just reset ready for the next checkpoint
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/// without checking anything. This can be helpful to limit the detection to
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/// easy-to-fix portions of an algorithm before allowing more difficult ones.
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void checkpoint(bool CheckDebugLocs = true);
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void createdInstr(MachineInstr &MI) override;
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void erasingInstr(MachineInstr &MI) override;
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void changingInstr(MachineInstr &MI) override;
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void changedInstr(MachineInstr &MI) override;
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private:
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void analyzeDebugLocations();
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};
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} // namespace llvm
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#endif // ifndef LLVM_CODEGEN_GLOBALISEL_LOSTDEBUGLOCOBSERVER_H
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