forked from OSchip/llvm-project
114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
//===----- M68kAsmPrinter.cpp - M68k LLVM Assembly Printer -----*- 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 contains a printer that converts from our internal representation
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/// of machine-dependent LLVM code to GAS-format M68k assembly language.
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///
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//===----------------------------------------------------------------------===//
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// TODO Conform to Motorola ASM syntax
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#include "M68kAsmPrinter.h"
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#include "M68k.h"
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#include "M68kMachineFunction.h"
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#include "MCTargetDesc/M68kInstPrinter.h"
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#include "TargetInfo/M68kTargetInfo.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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#define DEBUG_TYPE "m68k-asm-printer"
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bool M68kAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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MMFI = MF.getInfo<M68kMachineFunctionInfo>();
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MCInstLowering = std::make_unique<M68kMCInstLower>(MF, *this);
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AsmPrinter::runOnMachineFunction(MF);
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return true;
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}
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void M68kAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
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raw_ostream &OS) {
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const MachineOperand &MO = MI->getOperand(OpNum);
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switch (MO.getType()) {
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case MachineOperand::MO_Register:
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OS << "%" << M68kInstPrinter::getRegisterName(MO.getReg());
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break;
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case MachineOperand::MO_Immediate:
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OS << '#' << MO.getImm();
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break;
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case MachineOperand::MO_MachineBasicBlock:
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MO.getMBB()->getSymbol()->print(OS, MAI);
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break;
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case MachineOperand::MO_GlobalAddress:
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PrintSymbolOperand(MO, OS);
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break;
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case MachineOperand::MO_BlockAddress:
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GetBlockAddressSymbol(MO.getBlockAddress())->print(OS, MAI);
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break;
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case MachineOperand::MO_ConstantPoolIndex: {
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const DataLayout &DL = getDataLayout();
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OS << DL.getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
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<< MO.getIndex();
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break;
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}
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default:
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llvm_unreachable("not implemented");
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}
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}
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bool M68kAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
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const char *ExtraCode, raw_ostream &OS) {
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// Print the operand if there is no operand modifier.
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if (!ExtraCode || !ExtraCode[0]) {
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printOperand(MI, OpNo, OS);
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return false;
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}
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// Fallback to the default implementation.
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return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS);
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}
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void M68kAsmPrinter::emitInstruction(const MachineInstr *MI) {
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switch (MI->getOpcode()) {
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default: {
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if (MI->isPseudo()) {
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LLVM_DEBUG(dbgs() << "Pseudo opcode(" << MI->getOpcode()
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<< ") found in EmitInstruction()\n");
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llvm_unreachable("Cannot proceed");
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}
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break;
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}
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case M68k::TAILJMPj:
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case M68k::TAILJMPq:
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// Lower these as normal, but add some comments.
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OutStreamer->AddComment("TAILCALL");
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break;
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}
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MCInst TmpInst0;
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MCInstLowering->Lower(MI, TmpInst0);
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OutStreamer->emitInstruction(TmpInst0, getSubtargetInfo());
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}
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void M68kAsmPrinter::emitFunctionBodyStart() {}
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void M68kAsmPrinter::emitFunctionBodyEnd() {}
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void M68kAsmPrinter::emitStartOfAsmFile(Module &M) {
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OutStreamer->emitSyntaxDirective();
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}
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void M68kAsmPrinter::emitEndOfAsmFile(Module &M) {}
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extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeM68kAsmPrinter() {
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RegisterAsmPrinter<M68kAsmPrinter> X(getTheM68kTarget());
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}
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