89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
//===-- VEMCInstLower.cpp - Convert VE 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 VE MachineInstrs to their corresponding
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// MCInst records.
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/VEMCExpr.h"
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#include "VE.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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const MCSymbol *Symbol, AsmPrinter &AP) {
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VEMCExpr::VariantKind Kind = (VEMCExpr::VariantKind)MO.getTargetFlags();
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const MCExpr *Expr = MCSymbolRefExpr::create(Symbol, AP.OutContext);
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// Add offset iff MO is not jump table info or machine basic block.
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if (!MO.isJTI() && !MO.isMBB() && MO.getOffset())
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Expr = MCBinaryExpr::createAdd(
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Expr, MCConstantExpr::create(MO.getOffset(), AP.OutContext),
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AP.OutContext);
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Expr = VEMCExpr::create(Kind, Expr, AP.OutContext);
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return MCOperand::createExpr(Expr);
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}
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static MCOperand LowerOperand(const MachineInstr *MI, const MachineOperand &MO,
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AsmPrinter &AP) {
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switch (MO.getType()) {
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default:
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report_fatal_error("unsupported operand type");
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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_BlockAddress:
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return LowerSymbolOperand(
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MI, MO, AP.GetBlockAddressSymbol(MO.getBlockAddress()), AP);
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case MachineOperand::MO_ConstantPoolIndex:
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return LowerSymbolOperand(MI, MO, AP.GetCPISymbol(MO.getIndex()), AP);
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case MachineOperand::MO_ExternalSymbol:
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return LowerSymbolOperand(
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MI, MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()), AP);
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case MachineOperand::MO_GlobalAddress:
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return LowerSymbolOperand(MI, MO, AP.getSymbol(MO.getGlobal()), AP);
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case MachineOperand::MO_Immediate:
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return MCOperand::createImm(MO.getImm());
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case MachineOperand::MO_JumpTableIndex:
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return LowerSymbolOperand(MI, MO, AP.GetJTISymbol(MO.getIndex()), AP);
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case MachineOperand::MO_MachineBasicBlock:
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return LowerSymbolOperand(MI, MO, MO.getMBB()->getSymbol(), AP);
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case MachineOperand::MO_RegisterMask:
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break;
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}
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return MCOperand();
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}
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void llvm::LowerVEMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,
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AsmPrinter &AP) {
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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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