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annotate lib/Target/MSP430/MSP430MCInstLower.cpp @ 131:f476a9ba4795

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http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt
author mir3636
date Fri, 16 Feb 2018 21:02:11 +0900
parents 803732b1fca8
children c2174574ed3a
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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 using namespace llvm;
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30
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31 MCSymbol *MSP430MCInstLower::
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32 GetGlobalAddressSymbol(const MachineOperand &MO) const {
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33 switch (MO.getTargetFlags()) {
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34 default: llvm_unreachable("Unknown target flag on GV operand");
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35 case 0: break;
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36 }
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37
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38 return Printer.getSymbol(MO.getGlobal());
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39 }
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40
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41 MCSymbol *MSP430MCInstLower::
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42 GetExternalSymbolSymbol(const MachineOperand &MO) const {
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43 switch (MO.getTargetFlags()) {
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44 default: llvm_unreachable("Unknown target flag on GV operand");
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45 case 0: break;
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46 }
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47
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48 return Printer.GetExternalSymbolSymbol(MO.getSymbolName());
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49 }
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50
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51 MCSymbol *MSP430MCInstLower::
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52 GetJumpTableSymbol(const MachineOperand &MO) const {
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53 const DataLayout &DL = Printer.getDataLayout();
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54 SmallString<256> Name;
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55 raw_svector_ostream(Name) << DL.getPrivateGlobalPrefix() << "JTI"
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56 << Printer.getFunctionNumber() << '_'
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57 << MO.getIndex();
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58
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59 switch (MO.getTargetFlags()) {
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60 default: llvm_unreachable("Unknown target flag on GV operand");
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61 case 0: break;
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62 }
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63
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64 // Create a symbol for the name.
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65 return Ctx.getOrCreateSymbol(Name);
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66 }
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67
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68 MCSymbol *MSP430MCInstLower::
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69 GetConstantPoolIndexSymbol(const MachineOperand &MO) const {
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70 const DataLayout &DL = Printer.getDataLayout();
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71 SmallString<256> Name;
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72 raw_svector_ostream(Name) << DL.getPrivateGlobalPrefix() << "CPI"
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73 << Printer.getFunctionNumber() << '_'
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74 << MO.getIndex();
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75
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76 switch (MO.getTargetFlags()) {
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77 default: llvm_unreachable("Unknown target flag on GV operand");
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78 case 0: break;
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79 }
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80
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81 // Create a symbol for the name.
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82 return Ctx.getOrCreateSymbol(Name);
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83 }
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84
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85 MCSymbol *MSP430MCInstLower::
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86 GetBlockAddressSymbol(const MachineOperand &MO) const {
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87 switch (MO.getTargetFlags()) {
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88 default: llvm_unreachable("Unknown target flag on GV operand");
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89 case 0: break;
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90 }
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91
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92 return Printer.GetBlockAddressSymbol(MO.getBlockAddress());
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93 }
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94
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95 MCOperand MSP430MCInstLower::
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96 LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const {
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97 // FIXME: We would like an efficient form for this, so we don't have to do a
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98 // lot of extra uniquing.
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99 const MCExpr *Expr = MCSymbolRefExpr::create(Sym, Ctx);
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100
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101 switch (MO.getTargetFlags()) {
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102 default: llvm_unreachable("Unknown target flag on GV operand");
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103 case 0: break;
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104 }
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105
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106 if (!MO.isJTI() && MO.getOffset())
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107 Expr = MCBinaryExpr::createAdd(Expr,
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108 MCConstantExpr::create(MO.getOffset(), Ctx),
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109 Ctx);
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110 return MCOperand::createExpr(Expr);
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111 }
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112
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113 void MSP430MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
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114 OutMI.setOpcode(MI->getOpcode());
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115
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116 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
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117 const MachineOperand &MO = MI->getOperand(i);
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118
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119 MCOperand MCOp;
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120 switch (MO.getType()) {
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121 default:
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122 MI->print(errs());
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123 llvm_unreachable("unknown operand type");
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124 case MachineOperand::MO_Register:
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125 // Ignore all implicit register operands.
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126 if (MO.isImplicit()) continue;
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127 MCOp = MCOperand::createReg(MO.getReg());
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128 break;
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129 case MachineOperand::MO_Immediate:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 83
diff changeset
130 MCOp = MCOperand::createImm(MO.getImm());
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
131 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
132 case MachineOperand::MO_MachineBasicBlock:
95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 83
diff changeset
133 MCOp = MCOperand::createExpr(MCSymbolRefExpr::create(
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 MO.getMBB()->getSymbol(), Ctx));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
135 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 case MachineOperand::MO_GlobalAddress:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 case MachineOperand::MO_ExternalSymbol:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 case MachineOperand::MO_JumpTableIndex:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 case MachineOperand::MO_ConstantPoolIndex:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 case MachineOperand::MO_BlockAddress:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 MCOp = LowerSymbolOperand(MO, GetBlockAddressSymbol(MO));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 case MachineOperand::MO_RegisterMask:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 }
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 OutMI.addOperand(MCOp);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 }