88 lines · cpp
1//===-- VEMCInstLower.cpp - Convert VE MachineInstr to MCInst -------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file contains code to lower VE MachineInstrs to their corresponding10// MCInst records.11//12//===----------------------------------------------------------------------===//13 14#include "MCTargetDesc/VEMCAsmInfo.h"15#include "VE.h"16#include "llvm/CodeGen/AsmPrinter.h"17#include "llvm/CodeGen/MachineFunction.h"18#include "llvm/CodeGen/MachineInstr.h"19#include "llvm/CodeGen/MachineOperand.h"20#include "llvm/IR/Mangler.h"21#include "llvm/MC/MCAsmInfo.h"22#include "llvm/MC/MCContext.h"23#include "llvm/MC/MCExpr.h"24#include "llvm/MC/MCInst.h"25 26using namespace llvm;27 28static MCOperand LowerSymbolOperand(const MachineInstr *MI,29 const MachineOperand &MO,30 const MCSymbol *Symbol, AsmPrinter &AP) {31 auto Kind = (VE::Specifier)MO.getTargetFlags();32 33 const MCExpr *Expr = MCSymbolRefExpr::create(Symbol, AP.OutContext);34 // Add offset iff MO is not jump table info or machine basic block.35 if (!MO.isJTI() && !MO.isMBB() && MO.getOffset())36 Expr = MCBinaryExpr::createAdd(37 Expr, MCConstantExpr::create(MO.getOffset(), AP.OutContext),38 AP.OutContext);39 Expr = MCSpecifierExpr::create(Expr, Kind, AP.OutContext);40 return MCOperand::createExpr(Expr);41}42 43static MCOperand LowerOperand(const MachineInstr *MI, const MachineOperand &MO,44 AsmPrinter &AP) {45 switch (MO.getType()) {46 default:47 report_fatal_error("unsupported operand type");48 49 case MachineOperand::MO_Register:50 if (MO.isImplicit())51 break;52 return MCOperand::createReg(MO.getReg());53 54 case MachineOperand::MO_BlockAddress:55 return LowerSymbolOperand(56 MI, MO, AP.GetBlockAddressSymbol(MO.getBlockAddress()), AP);57 case MachineOperand::MO_ConstantPoolIndex:58 return LowerSymbolOperand(MI, MO, AP.GetCPISymbol(MO.getIndex()), AP);59 case MachineOperand::MO_ExternalSymbol:60 return LowerSymbolOperand(61 MI, MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()), AP);62 case MachineOperand::MO_GlobalAddress:63 return LowerSymbolOperand(MI, MO, AP.getSymbol(MO.getGlobal()), AP);64 case MachineOperand::MO_Immediate:65 return MCOperand::createImm(MO.getImm());66 case MachineOperand::MO_JumpTableIndex:67 return LowerSymbolOperand(MI, MO, AP.GetJTISymbol(MO.getIndex()), AP);68 case MachineOperand::MO_MachineBasicBlock:69 return LowerSymbolOperand(MI, MO, MO.getMBB()->getSymbol(), AP);70 71 case MachineOperand::MO_RegisterMask:72 break;73 }74 return MCOperand();75}76 77void llvm::LowerVEMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,78 AsmPrinter &AP) {79 OutMI.setOpcode(MI->getOpcode());80 81 for (const MachineOperand &MO : MI->operands()) {82 MCOperand MCOp = LowerOperand(MI, MO, AP);83 84 if (MCOp.isValid())85 OutMI.addOperand(MCOp);86 }87}88