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annotate lib/Target/MSP430/MSP430MCInstLower.cpp @ 77:54457678186b LLVM3.6

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents 95c75e76d11b
children 60c9769439b8
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1 //===-- MSP430MCInstLower.cpp - Convert MSP430 MachineInstr to an 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 MSP430 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 "MSP430MCInstLower.h"
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16 #include "llvm/ADT/SmallString.h"
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17 #include "llvm/CodeGen/AsmPrinter.h"
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18 #include "llvm/CodeGen/MachineBasicBlock.h"
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19 #include "llvm/CodeGen/MachineInstr.h"
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20 #include "llvm/IR/DataLayout.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 #include "llvm/Support/ErrorHandling.h"
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27 #include "llvm/Support/raw_ostream.h"
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28 #include "llvm/Target/TargetMachine.h"
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29 #include "llvm/Target/TargetSubtargetInfo.h"
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30 using namespace llvm;
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31
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32 MCSymbol *MSP430MCInstLower::
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33 GetGlobalAddressSymbol(const MachineOperand &MO) const {
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34 switch (MO.getTargetFlags()) {
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35 default: llvm_unreachable("Unknown target flag on GV operand");
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36 case 0: break;
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37 }
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38
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39 return Printer.getSymbol(MO.getGlobal());
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40 }
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41
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42 MCSymbol *MSP430MCInstLower::
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43 GetExternalSymbolSymbol(const MachineOperand &MO) const {
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44 switch (MO.getTargetFlags()) {
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45 default: llvm_unreachable("Unknown target flag on GV operand");
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46 case 0: break;
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47 }
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48
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49 return Printer.GetExternalSymbolSymbol(MO.getSymbolName());
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50 }
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51
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52 MCSymbol *MSP430MCInstLower::
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53 GetJumpTableSymbol(const MachineOperand &MO) const {
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54 const DataLayout *DL = Printer.TM.getSubtargetImpl()->getDataLayout();
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55 SmallString<256> Name;
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56 raw_svector_ostream(Name) << DL->getPrivateGlobalPrefix() << "JTI"
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57 << Printer.getFunctionNumber() << '_'
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58 << MO.getIndex();
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59
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60 switch (MO.getTargetFlags()) {
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61 default: llvm_unreachable("Unknown target flag on GV operand");
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62 case 0: break;
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63 }
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64
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65 // Create a symbol for the name.
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66 return Ctx.GetOrCreateSymbol(Name.str());
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67 }
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68
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69 MCSymbol *MSP430MCInstLower::
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70 GetConstantPoolIndexSymbol(const MachineOperand &MO) const {
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71 const DataLayout *DL = Printer.TM.getSubtargetImpl()->getDataLayout();
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72 SmallString<256> Name;
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73 raw_svector_ostream(Name) << DL->getPrivateGlobalPrefix() << "CPI"
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74 << Printer.getFunctionNumber() << '_'
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75 << MO.getIndex();
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76
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77 switch (MO.getTargetFlags()) {
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78 default: llvm_unreachable("Unknown target flag on GV operand");
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79 case 0: break;
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80 }
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81
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82 // Create a symbol for the name.
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83 return Ctx.GetOrCreateSymbol(Name.str());
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84 }
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85
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86 MCSymbol *MSP430MCInstLower::
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87 GetBlockAddressSymbol(const MachineOperand &MO) const {
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88 switch (MO.getTargetFlags()) {
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89 default: llvm_unreachable("Unknown target flag on GV operand");
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90 case 0: break;
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91 }
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92
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93 return Printer.GetBlockAddressSymbol(MO.getBlockAddress());
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94 }
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95
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96 MCOperand MSP430MCInstLower::
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97 LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const {
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98 // FIXME: We would like an efficient form for this, so we don't have to do a
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99 // lot of extra uniquing.
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100 const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, Ctx);
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101
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102 switch (MO.getTargetFlags()) {
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103 default: llvm_unreachable("Unknown target flag on GV operand");
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104 case 0: break;
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105 }
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106
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107 if (!MO.isJTI() && MO.getOffset())
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108 Expr = MCBinaryExpr::CreateAdd(Expr,
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109 MCConstantExpr::Create(MO.getOffset(), Ctx),
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110 Ctx);
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111 return MCOperand::CreateExpr(Expr);
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112 }
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113
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114 void MSP430MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
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115 OutMI.setOpcode(MI->getOpcode());
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116
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117 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
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118 const MachineOperand &MO = MI->getOperand(i);
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119
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120 MCOperand MCOp;
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121 switch (MO.getType()) {
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122 default:
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123 MI->dump();
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124 llvm_unreachable("unknown operand type");
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125 case MachineOperand::MO_Register:
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126 // Ignore all implicit register operands.
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127 if (MO.isImplicit()) continue;
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128 MCOp = MCOperand::CreateReg(MO.getReg());
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129 break;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
130 case MachineOperand::MO_Immediate:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
131 MCOp = MCOperand::CreateImm(MO.getImm());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
132 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
133 case MachineOperand::MO_MachineBasicBlock:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
135 MO.getMBB()->getSymbol(), Ctx));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 case MachineOperand::MO_GlobalAddress:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 case MachineOperand::MO_ExternalSymbol:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141 MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 case MachineOperand::MO_JumpTableIndex:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 case MachineOperand::MO_ConstantPoolIndex:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 case MachineOperand::MO_BlockAddress:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 MCOp = LowerSymbolOperand(MO, GetBlockAddressSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 case MachineOperand::MO_RegisterMask:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 OutMI.addOperand(MCOp);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 }