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//===-- Thumb2InstrInfo.h - Thumb-2 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 Thumb-2 implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_ARM_THUMB2INSTRINFO_H
#define LLVM_LIB_TARGET_ARM_THUMB2INSTRINFO_H
#include "ARMBaseInstrInfo.h"
#include "ThumbRegisterInfo.h"
namespace llvm {
class ARMSubtarget;
class ScheduleHazardRecognizer;
class Thumb2InstrInfo : public ARMBaseInstrInfo {
ThumbRegisterInfo RI;
public:
explicit Thumb2InstrInfo(const ARMSubtarget &STI);
/// Return the noop instruction to use for a noop.
MCInst getNop() const override;
// Return the non-pre/post incrementing version of 'Opc'. Return 0
// if there is not such an opcode.
unsigned getUnindexedOpcode(unsigned Opc) const override;
void ReplaceTailWithBranchTo(MachineBasicBlock::iterator Tail,
MachineBasicBlock *NewDest) const override;
bool isLegalToSplitMBBAt(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI) const override;
void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
bool KillSrc) const override;
void storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
Register SrcReg, bool isKill, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const override;
void loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
Register DestReg, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const override;
/// 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 ThumbRegisterInfo &getRegisterInfo() const override { return RI; }
MachineInstr *optimizeSelect(MachineInstr &MI,
SmallPtrSetImpl<MachineInstr *> &SeenMIs,
bool) const override;
MachineInstr *commuteInstructionImpl(MachineInstr &MI, bool NewMI,
unsigned OpIdx1,
unsigned OpIdx2) const override;
private:
void expandLoadStackGuard(MachineBasicBlock::iterator MI) const override;
};
/// getITInstrPredicate - Valid only in Thumb2 mode. This function is identical
/// to llvm::getInstrPredicate except it returns AL for conditional branch
/// instructions which are "predicated", but are not in IT blocks.
ARMCC::CondCodes getITInstrPredicate(const MachineInstr &MI, Register &PredReg);
// getVPTInstrPredicate: VPT analogue of that, plus a helper function
// corresponding to MachineInstr::findFirstPredOperandIdx.
int findFirstVPTPredOperandIdx(const MachineInstr &MI);
ARMVCC::VPTCodes getVPTInstrPredicate(const MachineInstr &MI,
Register &PredReg);
inline ARMVCC::VPTCodes getVPTInstrPredicate(const MachineInstr &MI) {
Register PredReg;
return getVPTInstrPredicate(MI, PredReg);
}
// Recomputes the Block Mask of Instr, a VPT or VPST instruction.
// This rebuilds the block mask of the instruction depending on the predicates
// of the instructions following it. This should only be used after the
// MVEVPTBlockInsertion pass has run, and should be used whenever a predicated
// instruction is added to/removed from the block.
void recomputeVPTBlockMask(MachineInstr &Instr);
} // namespace llvm
#endif
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