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108 lines
3.3 KiB
108 lines
3.3 KiB
4 months ago
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//===-- SparcMCInstLower.cpp - Convert Sparc MachineInstr to MCInst -------===//
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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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// This file contains code to lower Sparc MachineInstrs to their corresponding
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// MCInst records.
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/SparcMCExpr.h"
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#include "Sparc.h"
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#include "llvm/CodeGen/AsmPrinter.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/MachineOperand.h"
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#include "llvm/IR/Mangler.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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using namespace llvm;
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static MCOperand LowerSymbolOperand(const MachineInstr *MI,
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const MachineOperand &MO,
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AsmPrinter &AP) {
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SparcMCExpr::VariantKind Kind =
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(SparcMCExpr::VariantKind)MO.getTargetFlags();
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const MCSymbol *Symbol = nullptr;
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switch(MO.getType()) {
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default: llvm_unreachable("Unknown type in LowerSymbolOperand");
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case MachineOperand::MO_MachineBasicBlock:
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Symbol = MO.getMBB()->getSymbol();
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break;
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case MachineOperand::MO_GlobalAddress:
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Symbol = AP.getSymbol(MO.getGlobal());
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break;
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case MachineOperand::MO_BlockAddress:
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Symbol = AP.GetBlockAddressSymbol(MO.getBlockAddress());
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break;
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case MachineOperand::MO_ExternalSymbol:
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Symbol = AP.GetExternalSymbolSymbol(MO.getSymbolName());
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break;
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case MachineOperand::MO_ConstantPoolIndex:
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Symbol = AP.GetCPISymbol(MO.getIndex());
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break;
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}
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const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Symbol,
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AP.OutContext);
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const SparcMCExpr *expr = SparcMCExpr::create(Kind, MCSym,
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AP.OutContext);
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return MCOperand::createExpr(expr);
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}
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static MCOperand LowerOperand(const MachineInstr *MI,
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const MachineOperand &MO,
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AsmPrinter &AP) {
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switch(MO.getType()) {
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default: llvm_unreachable("unknown operand type"); break;
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case MachineOperand::MO_Register:
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if (MO.isImplicit())
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break;
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return MCOperand::createReg(MO.getReg());
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case MachineOperand::MO_Immediate:
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return MCOperand::createImm(MO.getImm());
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case MachineOperand::MO_MachineBasicBlock:
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case MachineOperand::MO_GlobalAddress:
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case MachineOperand::MO_BlockAddress:
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case MachineOperand::MO_ExternalSymbol:
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case MachineOperand::MO_ConstantPoolIndex:
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return LowerSymbolOperand(MI, MO, AP);
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case MachineOperand::MO_RegisterMask: break;
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}
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return MCOperand();
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}
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void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI,
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MCInst &OutMI,
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AsmPrinter &AP)
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{
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OutMI.setOpcode(MI->getOpcode());
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for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
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const MachineOperand &MO = MI->getOperand(i);
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MCOperand MCOp = LowerOperand(MI, MO, AP);
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if (MCOp.isValid())
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OutMI.addOperand(MCOp);
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}
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}
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