llvm/lib/Target/WebAssembly/WebAssemblyDebugValueManager.h

   1 // WebAssemblyDebugValueManager.h - WebAssembly DebugValue Manager -*- C++ -*-//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// This file contains the declaration of the WebAssembly-specific
  11 /// manager for DebugValues associated with the specific MachineInstr.
  12 /// This pass currently does not handle DBG_VALUE_LISTs; they are assumed to
  13 /// have been set to undef in NullifyDebugValueLists pass.
  14 /// TODO Handle DBG_VALUE_LIST
  15 ///
  16 //===----------------------------------------------------------------------===//
  17
  18 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYDEBUGVALUEMANAGER_H
  19 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYDEBUGVALUEMANAGER_H
  20
  21 #include "llvm/ADT/SmallVector.h"
  22 #include "llvm/CodeGen/Register.h"
  23
  24 namespace llvm {
  25
  26 class MachineInstr;
  27
  28 class WebAssemblyDebugValueManager {
  29   MachineInstr *Def;
  30   SmallVector<MachineInstr *, 1> DbgValues;
  31   Register CurrentReg;
  32   SmallVector<MachineInstr *, 1>
  33   getSinkableDebugValues(MachineInstr *Insert) const;
  34   bool isInsertSamePlace(MachineInstr *Insert) const;
  35
  36 public:
  37   WebAssemblyDebugValueManager(MachineInstr *Def);
  38
  39   // Sink 'Def', and also sink its eligible DBG_VALUEs to the place before
  40   // 'Insert'. Convert the original DBG_VALUEs into undefs.
  41   void sink(MachineInstr *Insert);
  42   // Clone 'Def' (optionally), and also clone its eligible DBG_VALUEs to the
  43   // place before 'Insert'.
  44   void cloneSink(MachineInstr *Insert, Register NewReg = Register(),
  45                  bool CloneDef = true) const;
  46   // Update the register for Def and DBG_VALUEs.
  47   void updateReg(Register Reg);
  48   // Replace the current register in DBG_VALUEs with the given LocalId target
  49   // index.
  50   void replaceWithLocal(unsigned LocalId);
  51   // Remove Def, and set its DBG_VALUEs to undef.
  52   void removeDef();
  53 };
  54
  55 } // end namespace llvm
  56
  57 #endif