MSP430InstrInfo.h

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//===-- MSP430InstrInfo.h - MSP430 Instruction Information ------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file contains the MSP430 implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_MSP430_MSP430INSTRINFO_H
#define LLVM_LIB_TARGET_MSP430_MSP430INSTRINFO_H
 
#include "MSP430RegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
 
#define GET_INSTRINFO_HEADER
#include "MSP430GenInstrInfo.inc"
 
namespace llvm {
 
class MSP430Subtarget;
 
class MSP430InstrInfo : public MSP430GenInstrInfo {
  const MSP430RegisterInfo RI;
  virtual void anchor();
public:
  explicit MSP430InstrInfo(const MSP430Subtarget &STI);
 
  /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
  /// such, whenever a client has an instance of instruction info, it should
  /// always be able to get register info as well (through this method).
  ///
  const MSP430RegisterInfo &getRegisterInfo() const { return RI; }
 
  void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                   bool KillSrc, bool RenamableDest = false,
                   bool RenamableSrc = false) const override;
 
  void storeRegToStackSlot(
      MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register SrcReg,
      bool isKill, int FrameIndex, const TargetRegisterClass *RC, Register VReg,
      MachineInstr::MIFlag Flags = MachineInstr::NoFlags) const override;
  void loadRegFromStackSlot(
      MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register DestReg,
      int FrameIdx, const TargetRegisterClass *RC, Register VReg,
      unsigned SubReg = 0,
      MachineInstr::MIFlag Flags = MachineInstr::NoFlags) const override;
 
  unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
 
  // Branch folding goodness
  bool
  reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
  bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
                     MachineBasicBlock *&FBB,
                     SmallVectorImpl<MachineOperand> &Cond,
                     bool AllowModify) const override;
 
  unsigned removeBranch(MachineBasicBlock &MBB,
                        int *BytesRemoved = nullptr) const override;
  unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
                        MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
                        const DebugLoc &DL,
                        int *BytesAdded = nullptr) const override;
 
  int64_t getFramePoppedByCallee(const MachineInstr &I) const {
    assert(isFrameInstr(I) && "Not a frame instruction");
    assert(I.getOperand(1).getImm() >= 0 && "Size must not be negative");
    return I.getOperand(1).getImm();
  }
};
 
}
 
#endif