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annotate lib/Target/Sparc/SparcMCInstLower.cpp @ 148:63bd29f05246

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merged
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 19:46:37 +0900
parents c2174574ed3a
children
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1 //===-- SparcMCInstLower.cpp - Convert Sparc MachineInstr to MCInst -------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file contains code to lower Sparc MachineInstrs to their corresponding
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10 // MCInst records.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "MCTargetDesc/SparcMCExpr.h"
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15 #include "Sparc.h"
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16 #include "llvm/CodeGen/AsmPrinter.h"
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17 #include "llvm/CodeGen/MachineFunction.h"
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18 #include "llvm/CodeGen/MachineInstr.h"
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19 #include "llvm/CodeGen/MachineOperand.h"
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20 #include "llvm/IR/Mangler.h"
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21 #include "llvm/MC/MCAsmInfo.h"
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22 #include "llvm/MC/MCContext.h"
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23 #include "llvm/MC/MCExpr.h"
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24 #include "llvm/MC/MCInst.h"
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25
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26 using namespace llvm;
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27
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28
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29 static MCOperand LowerSymbolOperand(const MachineInstr *MI,
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30 const MachineOperand &MO,
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31 AsmPrinter &AP) {
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32
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33 SparcMCExpr::VariantKind Kind =
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34 (SparcMCExpr::VariantKind)MO.getTargetFlags();
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35 const MCSymbol *Symbol = nullptr;
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36
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37 switch(MO.getType()) {
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38 default: llvm_unreachable("Unknown type in LowerSymbolOperand");
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39 case MachineOperand::MO_MachineBasicBlock:
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40 Symbol = MO.getMBB()->getSymbol();
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41 break;
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42
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43 case MachineOperand::MO_GlobalAddress:
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44 Symbol = AP.getSymbol(MO.getGlobal());
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45 break;
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46
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47 case MachineOperand::MO_BlockAddress:
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48 Symbol = AP.GetBlockAddressSymbol(MO.getBlockAddress());
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49 break;
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50
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51 case MachineOperand::MO_ExternalSymbol:
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52 Symbol = AP.GetExternalSymbolSymbol(MO.getSymbolName());
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53 break;
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54
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55 case MachineOperand::MO_ConstantPoolIndex:
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56 Symbol = AP.GetCPISymbol(MO.getIndex());
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57 break;
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58 }
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59
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60 const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Symbol,
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61 AP.OutContext);
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62 const SparcMCExpr *expr = SparcMCExpr::create(Kind, MCSym,
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63 AP.OutContext);
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64 return MCOperand::createExpr(expr);
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65 }
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67 static MCOperand LowerOperand(const MachineInstr *MI,
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68 const MachineOperand &MO,
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69 AsmPrinter &AP) {
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70 switch(MO.getType()) {
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71 default: llvm_unreachable("unknown operand type"); break;
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72 case MachineOperand::MO_Register:
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73 if (MO.isImplicit())
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74 break;
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75 return MCOperand::createReg(MO.getReg());
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77 case MachineOperand::MO_Immediate:
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78 return MCOperand::createImm(MO.getImm());
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79
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80 case MachineOperand::MO_MachineBasicBlock:
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81 case MachineOperand::MO_GlobalAddress:
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82 case MachineOperand::MO_BlockAddress:
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83 case MachineOperand::MO_ExternalSymbol:
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84 case MachineOperand::MO_ConstantPoolIndex:
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85 return LowerSymbolOperand(MI, MO, AP);
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86
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87 case MachineOperand::MO_RegisterMask: break;
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88
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89 }
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90 return MCOperand();
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91 }
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92
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93 void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI,
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94 MCInst &OutMI,
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95 AsmPrinter &AP)
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96 {
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97
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98 OutMI.setOpcode(MI->getOpcode());
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99
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100 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
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101 const MachineOperand &MO = MI->getOperand(i);
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102 MCOperand MCOp = LowerOperand(MI, MO, AP);
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103
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104 if (MCOp.isValid())
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105 OutMI.addOperand(MCOp);
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106 }
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107 }