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annotate lib/Target/Sparc/SparcMCInstLower.cpp @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents 1172e4bd9c6f
children c2174574ed3a
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1 //===-- SparcMCInstLower.cpp - Convert Sparc MachineInstr to MCInst -------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file contains code to lower Sparc MachineInstrs to their corresponding
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11 // MCInst records.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "MCTargetDesc/SparcMCExpr.h"
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16 #include "Sparc.h"
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17 #include "llvm/CodeGen/AsmPrinter.h"
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18 #include "llvm/CodeGen/MachineFunction.h"
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19 #include "llvm/CodeGen/MachineInstr.h"
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20 #include "llvm/CodeGen/MachineOperand.h"
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21 #include "llvm/IR/Mangler.h"
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22 #include "llvm/MC/MCAsmInfo.h"
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23 #include "llvm/MC/MCContext.h"
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24 #include "llvm/MC/MCExpr.h"
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25 #include "llvm/MC/MCInst.h"
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26
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27 using namespace llvm;
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28
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29
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30 static MCOperand LowerSymbolOperand(const MachineInstr *MI,
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31 const MachineOperand &MO,
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32 AsmPrinter &AP) {
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33
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34 SparcMCExpr::VariantKind Kind =
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35 (SparcMCExpr::VariantKind)MO.getTargetFlags();
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36 const MCSymbol *Symbol = nullptr;
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37
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38 switch(MO.getType()) {
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39 default: llvm_unreachable("Unknown type in LowerSymbolOperand");
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40 case MachineOperand::MO_MachineBasicBlock:
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41 Symbol = MO.getMBB()->getSymbol();
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42 break;
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43
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44 case MachineOperand::MO_GlobalAddress:
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45 Symbol = AP.getSymbol(MO.getGlobal());
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46 break;
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47
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48 case MachineOperand::MO_BlockAddress:
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49 Symbol = AP.GetBlockAddressSymbol(MO.getBlockAddress());
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50 break;
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51
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52 case MachineOperand::MO_ExternalSymbol:
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53 Symbol = AP.GetExternalSymbolSymbol(MO.getSymbolName());
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54 break;
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55
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56 case MachineOperand::MO_ConstantPoolIndex:
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57 Symbol = AP.GetCPISymbol(MO.getIndex());
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58 break;
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59 }
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60
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61 const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Symbol,
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62 AP.OutContext);
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63 const SparcMCExpr *expr = SparcMCExpr::create(Kind, MCSym,
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64 AP.OutContext);
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65 return MCOperand::createExpr(expr);
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66 }
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67
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68 static MCOperand LowerOperand(const MachineInstr *MI,
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69 const MachineOperand &MO,
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70 AsmPrinter &AP) {
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71 switch(MO.getType()) {
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72 default: llvm_unreachable("unknown operand type"); break;
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73 case MachineOperand::MO_Register:
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74 if (MO.isImplicit())
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75 break;
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76 return MCOperand::createReg(MO.getReg());
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78 case MachineOperand::MO_Immediate:
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79 return MCOperand::createImm(MO.getImm());
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80
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81 case MachineOperand::MO_MachineBasicBlock:
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82 case MachineOperand::MO_GlobalAddress:
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83 case MachineOperand::MO_BlockAddress:
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84 case MachineOperand::MO_ExternalSymbol:
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85 case MachineOperand::MO_ConstantPoolIndex:
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86 return LowerSymbolOperand(MI, MO, AP);
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87
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88 case MachineOperand::MO_RegisterMask: break;
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89
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90 }
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91 return MCOperand();
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92 }
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93
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94 void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI,
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95 MCInst &OutMI,
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96 AsmPrinter &AP)
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97 {
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98
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99 OutMI.setOpcode(MI->getOpcode());
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100
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101 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
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102 const MachineOperand &MO = MI->getOperand(i);
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103 MCOperand MCOp = LowerOperand(MI, MO, AP);
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104
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105 if (MCOp.isValid())
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106 OutMI.addOperand(MCOp);
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107 }
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108 }