AVRInstrInfo.h
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//===-- AVRInstrInfo.h - AVR 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 AVR implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_AVR_INSTR_INFO_H
#define LLVM_AVR_INSTR_INFO_H
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "AVRRegisterInfo.h"
#define GET_INSTRINFO_HEADER
#include "AVRGenInstrInfo.inc"
#undef GET_INSTRINFO_HEADER
namespace llvm {
namespace AVRCC {
/// AVR specific condition codes.
/// These correspond to `AVR_*_COND` in `AVRInstrInfo.td`.
/// They must be kept in synch.
enum CondCodes {
COND_EQ, //!< Equal
COND_NE, //!< Not equal
COND_GE, //!< Greater than or equal
COND_LT, //!< Less than
COND_SH, //!< Unsigned same or higher
COND_LO, //!< Unsigned lower
COND_MI, //!< Minus
COND_PL, //!< Plus
COND_INVALID
};
} // end of namespace AVRCC
namespace AVRII {
/// Specifies a target operand flag.
enum TOF {
MO_NO_FLAG,
/// On a symbol operand, this represents the lo part.
MO_LO = (1 << 1),
/// On a symbol operand, this represents the hi part.
MO_HI = (1 << 2),
/// On a symbol operand, this represents it has to be negated.
MO_NEG = (1 << 3)
};
} // end of namespace AVRII
/// Utilities related to the AVR instruction set.
class AVRInstrInfo : public AVRGenInstrInfo {
public:
explicit AVRInstrInfo();
const AVRRegisterInfo &getRegisterInfo() const { return RI; }
const MCInstrDesc &getBrCond(AVRCC::CondCodes CC) const;
AVRCC::CondCodes getCondFromBranchOpc(unsigned Opc) const;
AVRCC::CondCodes getOppositeCondition(AVRCC::CondCodes CC) const;
unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
bool KillSrc) const override;
void storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI, Register SrcReg,
bool isKill, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const override;
void loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI, Register DestReg,
int FrameIndex, const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const override;
unsigned isLoadFromStackSlot(const MachineInstr &MI,
int &FrameIndex) const override;
unsigned isStoreToStackSlot(const MachineInstr &MI,
int &FrameIndex) const override;
// Branch analysis.
bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
MachineBasicBlock *&FBB,
SmallVectorImpl<MachineOperand> &Cond,
bool AllowModify = false) const override;
unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
const DebugLoc &DL,
int *BytesAdded = nullptr) const override;
unsigned removeBranch(MachineBasicBlock &MBB,
int *BytesRemoved = nullptr) const override;
bool
reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
MachineBasicBlock *getBranchDestBlock(const MachineInstr &MI) const override;
bool isBranchOffsetInRange(unsigned BranchOpc,
int64_t BrOffset) const override;
unsigned insertIndirectBranch(MachineBasicBlock &MBB,
MachineBasicBlock &NewDestBB,
const DebugLoc &DL,
int64_t BrOffset,
RegScavenger *RS) const override;
private:
const AVRRegisterInfo RI;
};
} // end namespace llvm
#endif // LLVM_AVR_INSTR_INFO_H