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1924b30c0e
- TargetMachine implementation for M68k - ISel, ISched for M68k - Other lowering (e.g. FrameLowering) - AsmPrinter Authors: myhsu, m4yers, glaubitz Differential Revision: https://reviews.llvm.org/D88391
95 lines
3.8 KiB
C++
95 lines
3.8 KiB
C++
//===-- M68kInstrBuilder.h - Functions to build M68k insts --*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file exposes functions that may be used with BuildMI from the
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/// MachineInstrBuilder.h file to handle M68k'isms in a clean way.
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///
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/// TODO The BuildMem function may be used with the BuildMI function to add
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/// entire memory references in a single, typed, function call. M68k memory
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/// references can be very complex expressions (described in the README), so
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/// wrapping them up behind an easier to use interface makes sense.
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/// Descriptions of the functions are included below.
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///
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/// For reference, the order of operands for memory references is:
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/// (Operand), Base, Scale, Index, Displacement.
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///
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//===----------------------------------------------------------------------===//
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//
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#ifndef LLVM_LIB_TARGET_M68K_M68KINSTRBUILDER_H
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#define LLVM_LIB_TARGET_M68K_M68KINSTRBUILDER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineMemOperand.h"
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#include "llvm/CodeGen/MachineOperand.h"
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#include "llvm/MC/MCInstrDesc.h"
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#include <cassert>
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namespace llvm {
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namespace M68k {
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static inline const MachineInstrBuilder &
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addOffset(const MachineInstrBuilder &MIB, int Offset) {
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return MIB.addImm(Offset);
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}
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/// addRegIndirectWithDisp - This function is used to add a memory reference
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/// of the form (Offset, Base), i.e., one with no scale or index, but with a
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/// displacement. An example is: (4,D0).
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static inline const MachineInstrBuilder &
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addRegIndirectWithDisp(const MachineInstrBuilder &MIB, Register Reg,
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bool IsKill, int Offset) {
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return MIB.addImm(Offset).addReg(Reg, getKillRegState(IsKill));
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}
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/// addFrameReference - This function is used to add a reference to the base of
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/// an abstract object on the stack frame of the current function. This
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/// reference has base register as the FrameIndex offset until it is resolved.
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/// This allows a constant offset to be specified as well...
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static inline const MachineInstrBuilder &
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addFrameReference(const MachineInstrBuilder &MIB, int FI, int Offset = 0) {
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MachineInstr *MI = MIB;
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MachineFunction &MF = *MI->getParent()->getParent();
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MachineFrameInfo &MFI = MF.getFrameInfo();
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const MCInstrDesc &MCID = MI->getDesc();
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auto Flags = MachineMemOperand::MONone;
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if (MCID.mayLoad())
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Flags |= MachineMemOperand::MOLoad;
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if (MCID.mayStore())
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Flags |= MachineMemOperand::MOStore;
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MachineMemOperand *MMO = MF.getMachineMemOperand(
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MachinePointerInfo::getFixedStack(MF, FI, Offset), Flags,
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MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
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return MIB.addImm(Offset).addFrameIndex(FI).addMemOperand(MMO);
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}
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static inline const MachineInstrBuilder &
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addMemOperand(const MachineInstrBuilder &MIB, int FI, int Offset = 0) {
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MachineInstr *MI = MIB;
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MachineFunction &MF = *MI->getParent()->getParent();
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MachineFrameInfo &MFI = MF.getFrameInfo();
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const MCInstrDesc &MCID = MI->getDesc();
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auto Flags = MachineMemOperand::MONone;
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if (MCID.mayLoad())
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Flags |= MachineMemOperand::MOLoad;
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if (MCID.mayStore())
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Flags |= MachineMemOperand::MOStore;
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MachineMemOperand *MMO = MF.getMachineMemOperand(
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MachinePointerInfo::getFixedStack(MF, FI, Offset), Flags,
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MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
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return MIB.addMemOperand(MMO);
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}
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} // end namespace M68k
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_M6800_M6800INSTRBUILDER_H
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