llvm/llvm/lib/Target/SystemZ/SystemZInstrInfo.h

//===-- SystemZInstrInfo.h - SystemZ 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 SystemZ implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRINFO_H
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRINFO_H

#include "SystemZ.h"
#include "SystemZRegisterInfo.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include <cstdint>

#define GET_INSTRINFO_HEADER
#include "SystemZGenInstrInfo.inc"

namespace llvm {

class SystemZSubtarget;

namespace SystemZII {

enum { … };

static inline unsigned getAccessSize(unsigned int Flags) { … }

static inline unsigned getCCValues(unsigned int Flags) { … }

static inline unsigned getCompareZeroCCMask(unsigned int Flags) { … }

// SystemZ MachineOperand target flags.
enum { … };

// z/OS XPLink specific: classifies the types of
// accesses to the ADA (Associated Data Area).
// These enums contains values that overlap with the above MO_ enums,
// but that's fine since the above enums are used with ELF,
// while these values are used with z/OS.
enum { … };

// Classifies a branch.
enum BranchType { … };

// Information about a branch instruction.
class Branch { … };

// Kinds of fused compares in compare-and-* instructions.  Together with type
// of the converted compare, this identifies the compare-and-*
// instruction.
enum FusedCompareType { … };

} // end namespace SystemZII

namespace SystemZ {
int getTwoOperandOpcode(uint16_t Opcode);
int getTargetMemOpcode(uint16_t Opcode);

// Return a version of comparison CC mask CCMask in which the LT and GT
// actions are swapped.
unsigned reverseCCMask(unsigned CCMask);

// Create a new basic block after MBB.
MachineBasicBlock *emitBlockAfter(MachineBasicBlock *MBB);
// Split MBB after MI and return the new block (the one that contains
// instructions after MI).
MachineBasicBlock *splitBlockAfter(MachineBasicBlock::iterator MI,
                                   MachineBasicBlock *MBB);
// Split MBB before MI and return the new block (the one that contains MI).
MachineBasicBlock *splitBlockBefore(MachineBasicBlock::iterator MI,
                                    MachineBasicBlock *MBB);
}

class SystemZInstrInfo : public SystemZGenInstrInfo { … };

} // end namespace llvm

#endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRINFO_H