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annotate lib/IR/LLVMContext.cpp @ 56:bdef5c940791

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copy the previous function's return type to return value
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 23 Jan 2014 23:14:57 +0900
parents 95c75e76d11b
children 54457678186b
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1 //===-- LLVMContext.cpp - Implement LLVMContext ---------------------------===//
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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 LLVMContext, as a wrapper around the opaque
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11 // class LLVMContextImpl.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "llvm/IR/LLVMContext.h"
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16 #include "LLVMContextImpl.h"
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17 #include "llvm/IR/Constants.h"
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18 #include "llvm/IR/Instruction.h"
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19 #include "llvm/IR/Metadata.h"
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20 #include "llvm/Support/ManagedStatic.h"
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21 #include "llvm/Support/SourceMgr.h"
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22 #include <cctype>
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23 using namespace llvm;
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24
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25 static ManagedStatic<LLVMContext> GlobalContext;
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26
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27 LLVMContext& llvm::getGlobalContext() {
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28 return *GlobalContext;
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29 }
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30
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31 LLVMContext::LLVMContext() : pImpl(new LLVMContextImpl(*this)) {
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32 // Create the fixed metadata kinds. This is done in the same order as the
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33 // MD_* enum values so that they correspond.
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34
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35 // Create the 'dbg' metadata kind.
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36 unsigned DbgID = getMDKindID("dbg");
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37 assert(DbgID == MD_dbg && "dbg kind id drifted"); (void)DbgID;
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38
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39 // Create the 'tbaa' metadata kind.
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40 unsigned TBAAID = getMDKindID("tbaa");
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41 assert(TBAAID == MD_tbaa && "tbaa kind id drifted"); (void)TBAAID;
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42
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43 // Create the 'prof' metadata kind.
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44 unsigned ProfID = getMDKindID("prof");
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45 assert(ProfID == MD_prof && "prof kind id drifted"); (void)ProfID;
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46
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47 // Create the 'fpmath' metadata kind.
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48 unsigned FPAccuracyID = getMDKindID("fpmath");
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49 assert(FPAccuracyID == MD_fpmath && "fpmath kind id drifted");
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50 (void)FPAccuracyID;
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51
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52 // Create the 'range' metadata kind.
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53 unsigned RangeID = getMDKindID("range");
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54 assert(RangeID == MD_range && "range kind id drifted");
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55 (void)RangeID;
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56
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57 // Create the 'tbaa.struct' metadata kind.
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58 unsigned TBAAStructID = getMDKindID("tbaa.struct");
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59 assert(TBAAStructID == MD_tbaa_struct && "tbaa.struct kind id drifted");
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60 (void)TBAAStructID;
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61
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62 // Create the 'invariant.load' metadata kind.
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63 unsigned InvariantLdId = getMDKindID("invariant.load");
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64 assert(InvariantLdId == MD_invariant_load && "invariant.load kind id drifted");
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65 (void)InvariantLdId;
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66 }
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67 LLVMContext::~LLVMContext() { delete pImpl; }
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68
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69 void LLVMContext::addModule(Module *M) {
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70 pImpl->OwnedModules.insert(M);
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71 }
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72
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73 void LLVMContext::removeModule(Module *M) {
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74 pImpl->OwnedModules.erase(M);
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75 }
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76
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77 //===----------------------------------------------------------------------===//
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78 // Recoverable Backend Errors
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79 //===----------------------------------------------------------------------===//
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80
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81 void LLVMContext::
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82 setInlineAsmDiagnosticHandler(InlineAsmDiagHandlerTy DiagHandler,
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83 void *DiagContext) {
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84 pImpl->InlineAsmDiagHandler = DiagHandler;
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85 pImpl->InlineAsmDiagContext = DiagContext;
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86 }
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87
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88 /// getInlineAsmDiagnosticHandler - Return the diagnostic handler set by
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89 /// setInlineAsmDiagnosticHandler.
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90 LLVMContext::InlineAsmDiagHandlerTy
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91 LLVMContext::getInlineAsmDiagnosticHandler() const {
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92 return pImpl->InlineAsmDiagHandler;
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93 }
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94
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95 /// getInlineAsmDiagnosticContext - Return the diagnostic context set by
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96 /// setInlineAsmDiagnosticHandler.
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97 void *LLVMContext::getInlineAsmDiagnosticContext() const {
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98 return pImpl->InlineAsmDiagContext;
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99 }
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100
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101 void LLVMContext::emitError(const Twine &ErrorStr) {
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102 emitError(0U, ErrorStr);
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103 }
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104
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105 void LLVMContext::emitError(const Instruction *I, const Twine &ErrorStr) {
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106 unsigned LocCookie = 0;
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107 if (const MDNode *SrcLoc = I->getMetadata("srcloc")) {
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108 if (SrcLoc->getNumOperands() != 0)
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109 if (const ConstantInt *CI = dyn_cast<ConstantInt>(SrcLoc->getOperand(0)))
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110 LocCookie = CI->getZExtValue();
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111 }
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112 return emitError(LocCookie, ErrorStr);
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113 }
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114
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115 void LLVMContext::emitError(unsigned LocCookie, const Twine &ErrorStr) {
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116 // If there is no error handler installed, just print the error and exit.
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117 if (pImpl->InlineAsmDiagHandler == 0) {
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118 errs() << "error: " << ErrorStr << "\n";
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119 exit(1);
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120 }
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121
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122 // If we do have an error handler, we can report the error and keep going.
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123 SMDiagnostic Diag("", SourceMgr::DK_Error, ErrorStr.str());
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124
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125 pImpl->InlineAsmDiagHandler(Diag, pImpl->InlineAsmDiagContext, LocCookie);
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126 }
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127
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128 //===----------------------------------------------------------------------===//
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129 // Metadata Kind Uniquing
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130 //===----------------------------------------------------------------------===//
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131
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132 #ifndef NDEBUG
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133 /// isValidName - Return true if Name is a valid custom metadata handler name.
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134 static bool isValidName(StringRef MDName) {
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135 if (MDName.empty())
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136 return false;
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137
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138 if (!std::isalpha(static_cast<unsigned char>(MDName[0])))
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139 return false;
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140
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141 for (StringRef::iterator I = MDName.begin() + 1, E = MDName.end(); I != E;
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142 ++I) {
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143 if (!std::isalnum(static_cast<unsigned char>(*I)) && *I != '_' &&
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144 *I != '-' && *I != '.')
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145 return false;
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146 }
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147 return true;
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148 }
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149 #endif
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150
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151 /// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
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152 unsigned LLVMContext::getMDKindID(StringRef Name) const {
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153 assert(isValidName(Name) && "Invalid MDNode name");
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154
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155 // If this is new, assign it its ID.
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156 return
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157 pImpl->CustomMDKindNames.GetOrCreateValue(
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158 Name, pImpl->CustomMDKindNames.size()).second;
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159 }
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160
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161 /// getHandlerNames - Populate client supplied smallvector using custome
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162 /// metadata name and ID.
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163 void LLVMContext::getMDKindNames(SmallVectorImpl<StringRef> &Names) const {
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164 Names.resize(pImpl->CustomMDKindNames.size());
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165 for (StringMap<unsigned>::const_iterator I = pImpl->CustomMDKindNames.begin(),
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166 E = pImpl->CustomMDKindNames.end(); I != E; ++I)
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167 Names[I->second] = I->first();
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168 }