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annotate lib/CodeGen/PseudoSourceValue.cpp @ 128:c347d3398279 default tip

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fix
author mir3636
date Wed, 06 Dec 2017 14:37:17 +0900
parents 803732b1fca8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //===-- llvm/CodeGen/PseudoSourceValue.cpp ----------------------*- C++ -*-===//
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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 implements the PseudoSourceValue class.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "llvm/CodeGen/PseudoSourceValue.h"
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15 #include "llvm/ADT/STLExtras.h"
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16 #include "llvm/CodeGen/MachineFrameInfo.h"
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17 #include "llvm/Target/TargetInstrInfo.h"
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18 #include "llvm/IR/DerivedTypes.h"
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19 #include "llvm/IR/LLVMContext.h"
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20 #include "llvm/Support/ErrorHandling.h"
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21 #include "llvm/Support/raw_ostream.h"
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22 using namespace llvm;
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23
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24 static const char *const PSVNames[] = {
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25 "Stack", "GOT", "JumpTable", "ConstantPool", "FixedStack",
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26 "GlobalValueCallEntry", "ExternalSymbolCallEntry"};
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27
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28 PseudoSourceValue::PseudoSourceValue(PSVKind Kind, const TargetInstrInfo &TII)
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29 : Kind(Kind) {
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30 AddressSpace = TII.getAddressSpaceForPseudoSourceKind(Kind);
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31 }
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32
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34 PseudoSourceValue::~PseudoSourceValue() {}
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35
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36 void PseudoSourceValue::printCustom(raw_ostream &O) const {
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37 if (Kind < TargetCustom)
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38 O << PSVNames[Kind];
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39 else
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40 O << "TargetCustom" << Kind;
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41 }
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42
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43 bool PseudoSourceValue::isConstant(const MachineFrameInfo *) const {
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44 if (isStack())
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45 return false;
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46 if (isGOT() || isConstantPool() || isJumpTable())
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47 return true;
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48 llvm_unreachable("Unknown PseudoSourceValue!");
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49 }
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50
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51 bool PseudoSourceValue::isAliased(const MachineFrameInfo *) const {
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52 if (isStack() || isGOT() || isConstantPool() || isJumpTable())
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53 return false;
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54 llvm_unreachable("Unknown PseudoSourceValue!");
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55 }
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56
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57 bool PseudoSourceValue::mayAlias(const MachineFrameInfo *) const {
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58 return !(isGOT() || isConstantPool() || isJumpTable());
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59 }
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60
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61 bool FixedStackPseudoSourceValue::isConstant(
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62 const MachineFrameInfo *MFI) const {
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63 return MFI && MFI->isImmutableObjectIndex(FI);
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64 }
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65
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66 bool FixedStackPseudoSourceValue::isAliased(const MachineFrameInfo *MFI) const {
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67 if (!MFI)
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68 return true;
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69 return MFI->isAliasedObjectIndex(FI);
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70 }
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71
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72 bool FixedStackPseudoSourceValue::mayAlias(const MachineFrameInfo *MFI) const {
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73 if (!MFI)
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74 return true;
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75 // Spill slots will not alias any LLVM IR value.
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76 return !MFI->isSpillSlotObjectIndex(FI);
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77 }
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78
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79 void FixedStackPseudoSourceValue::printCustom(raw_ostream &OS) const {
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80 OS << "FixedStack" << FI;
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81 }
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82
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83 CallEntryPseudoSourceValue::CallEntryPseudoSourceValue(
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84 PSVKind Kind, const TargetInstrInfo &TII)
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85 : PseudoSourceValue(Kind, TII) {}
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86
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87 bool CallEntryPseudoSourceValue::isConstant(const MachineFrameInfo *) const {
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88 return false;
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89 }
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90
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91 bool CallEntryPseudoSourceValue::isAliased(const MachineFrameInfo *) const {
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92 return false;
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93 }
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94
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95 bool CallEntryPseudoSourceValue::mayAlias(const MachineFrameInfo *) const {
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96 return false;
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97 }
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98
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99 GlobalValuePseudoSourceValue::GlobalValuePseudoSourceValue(
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100 const GlobalValue *GV,
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101 const TargetInstrInfo &TII)
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102 : CallEntryPseudoSourceValue(GlobalValueCallEntry, TII), GV(GV) {}
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103 ExternalSymbolPseudoSourceValue::ExternalSymbolPseudoSourceValue(
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104 const char *ES, const TargetInstrInfo &TII)
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105 : CallEntryPseudoSourceValue(ExternalSymbolCallEntry, TII), ES(ES) {}
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106
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107 PseudoSourceValueManager::PseudoSourceValueManager(
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108 const TargetInstrInfo &TIInfo)
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109 : TII(TIInfo),
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110 StackPSV(PseudoSourceValue::Stack, TII),
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111 GOTPSV(PseudoSourceValue::GOT, TII),
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112 JumpTablePSV(PseudoSourceValue::JumpTable, TII),
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113 ConstantPoolPSV(PseudoSourceValue::ConstantPool, TII) {}
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114
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115 const PseudoSourceValue *PseudoSourceValueManager::getStack() {
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116 return &StackPSV;
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117 }
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118
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119 const PseudoSourceValue *PseudoSourceValueManager::getGOT() { return &GOTPSV; }
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120
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121 const PseudoSourceValue *PseudoSourceValueManager::getConstantPool() {
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122 return &ConstantPoolPSV;
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123 }
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124
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125 const PseudoSourceValue *PseudoSourceValueManager::getJumpTable() {
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126 return &JumpTablePSV;
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127 }
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128
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129 const PseudoSourceValue *
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130 PseudoSourceValueManager::getFixedStack(int FI) {
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131 std::unique_ptr<FixedStackPseudoSourceValue> &V = FSValues[FI];
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132 if (!V)
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133 V = llvm::make_unique<FixedStackPseudoSourceValue>(FI, TII);
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134 return V.get();
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135 }
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136
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137 const PseudoSourceValue *
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138 PseudoSourceValueManager::getGlobalValueCallEntry(const GlobalValue *GV) {
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139 std::unique_ptr<const GlobalValuePseudoSourceValue> &E =
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140 GlobalCallEntries[GV];
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141 if (!E)
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142 E = llvm::make_unique<GlobalValuePseudoSourceValue>(GV, TII);
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143 return E.get();
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144 }
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145
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146 const PseudoSourceValue *
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147 PseudoSourceValueManager::getExternalSymbolCallEntry(const char *ES) {
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148 std::unique_ptr<const ExternalSymbolPseudoSourceValue> &E =
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149 ExternalCallEntries[ES];
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150 if (!E)
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151 E = llvm::make_unique<ExternalSymbolPseudoSourceValue>(ES, TII);
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152 return E.get();
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153 }