1 //===-- SparcMCInstLower.cpp - Convert Sparc 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file contains code to lower Sparc MachineInstrs to their corresponding 10 // MCInst records. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "MCTargetDesc/SparcMCExpr.h" 15 #include "Sparc.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 26 using namespace llvm; 27 28 29 static MCOperand LowerSymbolOperand(const MachineInstr *MI, 30 const MachineOperand &MO, 31 AsmPrinter &AP) { 32 33 SparcMCExpr::VariantKind Kind = 34 (SparcMCExpr::VariantKind)MO.getTargetFlags(); 35 const MCSymbol *Symbol = nullptr; 36 37 switch(MO.getType()) { 38 default: llvm_unreachable("Unknown type in LowerSymbolOperand"); 39 case MachineOperand::MO_MachineBasicBlock: 40 Symbol = MO.getMBB()->getSymbol(); 41 break; 42 43 case MachineOperand::MO_GlobalAddress: 44 Symbol = AP.getSymbol(MO.getGlobal()); 45 break; 46 47 case MachineOperand::MO_BlockAddress: 48 Symbol = AP.GetBlockAddressSymbol(MO.getBlockAddress()); 49 break; 50 51 case MachineOperand::MO_ExternalSymbol: 52 Symbol = AP.GetExternalSymbolSymbol(MO.getSymbolName()); 53 break; 54 55 case MachineOperand::MO_ConstantPoolIndex: 56 Symbol = AP.GetCPISymbol(MO.getIndex()); 57 break; 58 } 59 60 const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Symbol, 61 AP.OutContext); 62 const SparcMCExpr *expr = SparcMCExpr::create(Kind, MCSym, 63 AP.OutContext); 64 return MCOperand::createExpr(expr); 65 } 66 67 static MCOperand LowerOperand(const MachineInstr *MI, 68 const MachineOperand &MO, 69 AsmPrinter &AP) { 70 switch(MO.getType()) { 71 default: llvm_unreachable("unknown operand type"); break; 72 case MachineOperand::MO_Register: 73 if (MO.isImplicit()) 74 break; 75 return MCOperand::createReg(MO.getReg()); 76 77 case MachineOperand::MO_Immediate: 78 return MCOperand::createImm(MO.getImm()); 79 80 case MachineOperand::MO_MachineBasicBlock: 81 case MachineOperand::MO_GlobalAddress: 82 case MachineOperand::MO_BlockAddress: 83 case MachineOperand::MO_ExternalSymbol: 84 case MachineOperand::MO_ConstantPoolIndex: 85 return LowerSymbolOperand(MI, MO, AP); 86 87 case MachineOperand::MO_RegisterMask: break; 88 89 } 90 return MCOperand(); 91 } 92 93 void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI, 94 MCInst &OutMI, 95 AsmPrinter &AP) 96 { 97 98 OutMI.setOpcode(MI->getOpcode()); 99 100 for (const MachineOperand &MO : MI->operands()) { 101 MCOperand MCOp = LowerOperand(MI, MO, AP); 102 103 if (MCOp.isValid()) 104 OutMI.addOperand(MCOp); 105 } 106 } 107