PIC16InstrInfo.h

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//===- PIC16InstrInfo.h - PIC16 Instruction Information----------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the niversity of Illinois Open Source 
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the PIC16 implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//

#ifndef PIC16INSTRUCTIONINFO_H
#define PIC16INSTRUCTIONINFO_H

#include "PIC16.h"
#include "PIC16RegisterInfo.h"
#include "llvm/Target/TargetInstrInfo.h"

namespace llvm {


class PIC16InstrInfo : public TargetInstrInfoImpl 
{
  PIC16TargetMachine &TM;
  const PIC16RegisterInfo RegInfo;
public:
  explicit PIC16InstrInfo(PIC16TargetMachine &TM);

  virtual const PIC16RegisterInfo &getRegisterInfo() const { return RegInfo; }

  /// isLoadFromStackSlot - If the specified machine instruction is a direct
  /// load from a stack slot, return the virtual or physical register number of
  /// the destination along with the FrameIndex of the loaded stack slot.  If
  /// not, return 0.  This predicate must return 0 if the instruction has
  /// any side effects other than loading from the stack slot.
  virtual unsigned isLoadFromStackSlot(const MachineInstr *MI, 
                                       int &FrameIndex) const;
                                                                               
  /// isStoreToStackSlot - If the specified machine instruction is a direct
  /// store to a stack slot, return the virtual or physical register number of
  /// the source reg along with the FrameIndex of the loaded stack slot.  If
  /// not, return 0.  This predicate must return 0 if the instruction has
  /// any side effects other than storing to the stack slot.
  virtual unsigned isStoreToStackSlot(const MachineInstr *MI, 
                                      int &FrameIndex) const;

  virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
                                   MachineBasicBlock::iterator MBBI,
                                   unsigned SrcReg, bool isKill, int FrameIndex,
                                   const TargetRegisterClass *RC) const;
                                                                               
  virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator MBBI,
                                    unsigned DestReg, int FrameIndex,
                                    const TargetRegisterClass *RC) const;
  virtual bool copyRegToReg(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI,
                            unsigned DestReg, unsigned SrcReg,
                            const TargetRegisterClass *DestRC,
                            const TargetRegisterClass *SrcRC) const;
  virtual bool isMoveInstr(const MachineInstr &MI,
                           unsigned &SrcReg, unsigned &DstReg,
                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;

};

} // namespace llvm

#endif