73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
//===- LiveDebugVariables.h - Tracking debug info variables -----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file provides the interface to the LiveDebugVariables analysis.
|
|
//
|
|
// The analysis removes DBG_VALUE instructions for virtual registers and tracks
|
|
// live user variables in a data structure that can be updated during register
|
|
// allocation.
|
|
//
|
|
// After register allocation new DBG_VALUE instructions are emitted to reflect
|
|
// the new locations of user variables.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_CODEGEN_LIVEDEBUGVARIABLES_H
|
|
#define LLVM_LIB_CODEGEN_LIVEDEBUGVARIABLES_H
|
|
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
|
|
namespace llvm {
|
|
|
|
template <typename T> class ArrayRef;
|
|
class LiveIntervals;
|
|
class VirtRegMap;
|
|
|
|
class LLVM_LIBRARY_VISIBILITY LiveDebugVariables : public MachineFunctionPass {
|
|
void *pImpl = nullptr;
|
|
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid
|
|
|
|
LiveDebugVariables();
|
|
~LiveDebugVariables() override;
|
|
|
|
/// renameRegister - Move any user variables in OldReg to NewReg:SubIdx.
|
|
/// @param OldReg Old virtual register that is going away.
|
|
/// @param NewReg New register holding the user variables.
|
|
/// @param SubIdx If NewReg is a virtual register, SubIdx may indicate a sub-
|
|
/// register.
|
|
void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx);
|
|
|
|
/// splitRegister - Move any user variables in OldReg to the live ranges in
|
|
/// NewRegs where they are live. Mark the values as unavailable where no new
|
|
/// register is live.
|
|
void splitRegister(unsigned OldReg, ArrayRef<unsigned> NewRegs,
|
|
LiveIntervals &LIS);
|
|
|
|
/// emitDebugValues - Emit new DBG_VALUE instructions reflecting the changes
|
|
/// that happened during register allocation.
|
|
/// @param VRM Rename virtual registers according to map.
|
|
void emitDebugValues(VirtRegMap *VRM);
|
|
|
|
/// dump - Print data structures to dbgs().
|
|
void dump() const;
|
|
|
|
private:
|
|
bool runOnMachineFunction(MachineFunction &) override;
|
|
void releaseMemory() override;
|
|
void getAnalysisUsage(AnalysisUsage &) const override;
|
|
bool doInitialization(Module &) override;
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_LIB_CODEGEN_LIVEDEBUGVARIABLES_H
|