| //===----- llvm/CodeGen/GlobalISel/LostDebugLocObserver.h -------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| /// \file |
| /// Tracks DebugLocs between checkpoints and verifies that they are transferred. |
| /// |
| //===----------------------------------------------------------------------===// |
| #ifndef LLVM_CODEGEN_GLOBALISEL_LOSTDEBUGLOCOBSERVER_H |
| #define LLVM_CODEGEN_GLOBALISEL_LOSTDEBUGLOCOBSERVER_H |
| |
| #include "llvm/ADT/SmallSet.h" |
| #include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h" |
| |
| namespace llvm { |
| class LostDebugLocObserver : public GISelChangeObserver { |
| StringRef DebugType; |
| SmallSet<DebugLoc, 4> LostDebugLocs; |
| SmallPtrSet<MachineInstr *, 4> PotentialMIsForDebugLocs; |
| unsigned NumLostDebugLocs = 0; |
| |
| public: |
| LostDebugLocObserver(StringRef DebugType) : DebugType(DebugType) {} |
| |
| unsigned getNumLostDebugLocs() const { return NumLostDebugLocs; } |
| |
| /// Call this to indicate that it's a good point to assess whether locations |
| /// have been lost. Typically this will be when a logical change has been |
| /// completed such as the caller has finished replacing some instructions with |
| /// alternatives. When CheckDebugLocs is true, the locations will be checked |
| /// to see if any have been lost since the last checkpoint. When |
| /// CheckDebugLocs is false, it will just reset ready for the next checkpoint |
| /// without checking anything. This can be helpful to limit the detection to |
| /// easy-to-fix portions of an algorithm before allowing more difficult ones. |
| void checkpoint(bool CheckDebugLocs = true); |
| |
| void createdInstr(MachineInstr &MI) override; |
| void erasingInstr(MachineInstr &MI) override; |
| void changingInstr(MachineInstr &MI) override; |
| void changedInstr(MachineInstr &MI) override; |
| |
| private: |
| void analyzeDebugLocations(); |
| }; |
| |
| } // namespace llvm |
| #endif // LLVM_CODEGEN_GLOBALISEL_LOSTDEBUGLOCOBSERVER_H |