llvm/llvm/lib/Target/ARM/Thumb2InstrInfo.h

//===-- 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 Thumb2InstrInfo : public ARMBaseInstrInfo { … };

/// 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) { … }

// 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