Mercurial > projects > ldc
annotate ir/irstruct.cpp @ 798:92ea3015ace6
Use toParent instead of toParent2 to determine whether inside a function body.
author | Christian Kamm <kamm incasoftware de> |
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date | Sat, 29 Nov 2008 17:06:36 +0100 |
parents | 340acf1535d0 |
children | d14e4594c7d7 |
rev | line source |
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136
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1 #include "gen/llvm.h" |
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2 |
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3 #include "mtype.h" |
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4 #include "aggregate.h" |
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5 #include "declaration.h" |
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6 #include "init.h" |
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7 |
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8 #include "ir/irstruct.h" |
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[svn r173] moved IR state previously stored in Type into IrType and a Type->IrType map; fixes #7
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9 #include "gen/irstate.h" |
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10 #include "gen/tollvm.h" |
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11 #include "gen/logger.h" |
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12 |
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[svn r328] Fixed an issue with interfaces where the vtable type of a interface implemented could be invalid. Fixes several tango modules like, FileStream, ServerSocket
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13 IrInterface::IrInterface(BaseClass* b) |
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14 : vtblInitTy(llvm::OpaqueType::get()) |
136
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15 { |
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16 base = b; |
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17 decl = b->base; |
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18 vtblInit = NULL; |
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19 vtbl = NULL; |
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20 infoTy = NULL; |
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21 infoInit = NULL; |
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22 info = NULL; |
137 | 23 |
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24 index = 0; |
136
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25 } |
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26 |
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27 ////////////////////////////////////////////////////////////////////////////// |
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28 ////////////////////////////////////////////////////////////////////////////// |
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29 ////////////////////////////////////////////////////////////////////////////// |
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30 |
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31 IrStruct::IrStruct(AggregateDeclaration* aggr) |
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32 : initOpaque(llvm::OpaqueType::get()), |
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33 classInfoOpaque(llvm::OpaqueType::get()), |
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34 vtblTy(llvm::OpaqueType::get()), |
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35 vtblInitTy(llvm::OpaqueType::get()) |
136
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36 { |
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37 aggrdecl = aggr; |
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38 defaultFound = false; |
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39 anon = NULL; |
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40 index = 0; |
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41 |
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42 type = aggr->type; |
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43 defined = false; |
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44 constinited = false; |
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45 |
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46 interfaceInfos = NULL; |
137 | 47 vtbl = NULL; |
48 constVtbl = NULL; | |
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49 |
137 | 50 init = NULL; |
51 constInit = NULL; | |
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52 |
137 | 53 classInfo = NULL; |
54 constClassInfo = NULL; | |
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55 classInfoDeclared = false; |
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56 classInfoDefined = false; |
252 | 57 |
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58 packed = false; |
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59 |
252 | 60 dwarfComposite = NULL; |
136
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61 } |
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62 |
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63 IrStruct::~IrStruct() |
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64 { |
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65 } |
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parents:
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66 |
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67 ////////////////////////////////////////// |
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68 |
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69 void IrStruct::pushAnon(bool isunion) |
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70 { |
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71 anon = new Anon(isunion, anon); |
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72 } |
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73 |
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74 ////////////////////////////////////////// |
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75 |
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76 void IrStruct::popAnon() |
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77 { |
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78 assert(anon); |
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79 |
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80 const LLType* BT; |
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81 |
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82 // get the anon type |
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83 if (anon->isunion) |
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84 { |
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85 // get biggest type in block |
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86 const LLType* biggest = getBiggestType(&anon->types[0], anon->types.size()); |
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87 std::vector<const LLType*> vec(1, biggest); |
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88 BT = LLStructType::get(vec, aggrdecl->ir.irStruct->packed); |
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89 } |
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90 else |
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91 { |
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92 // build a struct from the types |
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93 BT = LLStructType::get(anon->types, aggrdecl->ir.irStruct->packed); |
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94 } |
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95 |
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96 // pop anon |
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97 Anon* tmp = anon; |
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98 anon = anon->parent; |
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99 delete tmp; |
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100 |
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101 // is there a parent anon? |
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102 if (anon) |
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103 { |
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104 // make sure type gets pushed in the anon, not the main |
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105 anon->types.push_back(BT); |
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106 // index is only manipulated at the top level, anons use raw offsets |
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107 } |
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108 // no parent anon, finally add to aggrdecl |
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109 else |
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110 { |
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111 types.push_back(BT); |
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112 // only advance to next position if main is not a union |
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113 if (!aggrdecl->isUnionDeclaration()) |
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114 { |
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115 index++; |
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116 } |
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117 } |
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118 } |
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119 |
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120 ////////////////////////////////////////// |
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121 |
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122 void addZeros(std::vector<const llvm::Type*>& inits, size_t pos, size_t offset); |
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123 |
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124 void IrStruct::addVar(VarDeclaration * var) |
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125 { |
797
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126 TypeVector* tvec = &types; |
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127 if (anon) |
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128 { |
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129 // make sure type gets pushed in the anon, not the main |
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130 tvec = &anon->types; |
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131 |
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132 // set but don't advance index |
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133 var->ir.irField->index = index; |
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134 |
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135 // set offset in bytes from start of anon block |
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136 var->ir.irField->unionOffset = var->offset - var->offset2; |
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137 } |
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138 else if (aggrdecl->isUnionDeclaration()) |
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139 { |
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140 // set but don't advance index |
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141 var->ir.irField->index = index; |
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142 } |
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143 else |
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144 { |
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145 // set and advance index |
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146 var->ir.irField->index = index++; |
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147 } |
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148 |
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149 // add type |
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150 tvec->push_back(DtoType(var->type)); |
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151 |
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152 // add var |
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153 varDecls.push_back(var); |
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154 } |
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155 |
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156 ////////////////////////////////////////// |
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157 |
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158 const LLType* IrStruct::build() |
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159 { |
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160 // if types is empty, add a byte |
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161 if (types.empty()) |
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162 { |
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163 types.push_back(LLType::Int8Ty); |
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164 } |
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165 |
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166 // union type |
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167 if (aggrdecl->isUnionDeclaration()) |
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168 { |
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169 const LLType* biggest = getBiggestType(&types[0], types.size()); |
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170 std::vector<const LLType*> vec(1, biggest); |
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171 return LLStructType::get(vec, aggrdecl->ir.irStruct->packed); |
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172 } |
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173 // struct/class type |
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174 else |
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175 { |
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176 return LLStructType::get(types, aggrdecl->ir.irStruct->packed); |
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177 } |
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178 } |
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179 |
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180 void addZeros(std::vector<const llvm::Type*>& inits, size_t pos, size_t offset) |
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181 { |
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182 assert(offset > pos); |
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183 size_t diff = offset - pos; |
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184 |
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185 size_t sz; |
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186 |
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187 do |
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188 { |
797
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189 if (pos%8 == 0 && diff >= 8) |
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190 sz = 8; |
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191 else if (pos%4 == 0 && diff >= 4) |
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192 sz = 4; |
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193 else if (pos%2 == 0 && diff >= 2) |
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194 sz = 2; |
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195 else // if (pos % 1 == 0) |
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196 sz = 1; |
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197 inits.push_back(LLIntegerType::get(sz*8)); |
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198 pos += sz; |
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199 diff -= sz; |
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200 } while (pos < offset); |
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201 |
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202 assert(pos == offset); |
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203 } |
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204 |
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205 void addZeros(std::vector<llvm::Constant*>& inits, size_t pos, size_t offset) |
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206 { |
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207 assert(offset > pos); |
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208 size_t diff = offset - pos; |
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209 |
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210 size_t sz; |
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211 |
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212 do |
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213 { |
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214 if (pos%8 == 0 && diff >= 8) |
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215 sz = 8; |
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216 else if (pos%4 == 0 && diff >= 4) |
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217 sz = 4; |
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218 else if (pos%2 == 0 && diff >= 2) |
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219 sz = 2; |
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220 else // if (pos % 1 == 0) |
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221 sz = 1; |
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222 inits.push_back(LLConstant::getNullValue(LLIntegerType::get(sz*8))); |
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223 pos += sz; |
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224 diff -= sz; |
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225 } while (pos < offset); |
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226 |
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227 assert(pos == offset); |
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228 } |
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229 |
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230 // FIXME: body is exact copy of above |
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231 void addZeros(std::vector<llvm::Value*>& inits, size_t pos, size_t offset) |
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232 { |
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233 assert(offset > pos); |
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234 size_t diff = offset - pos; |
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235 |
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236 size_t sz; |
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237 |
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238 do |
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239 { |
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240 if (pos%8 == 0 && diff >= 8) |
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241 sz = 8; |
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242 else if (pos%4 == 0 && diff >= 4) |
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243 sz = 4; |
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244 else if (pos%2 == 0 && diff >= 2) |
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245 sz = 2; |
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246 else // if (pos % 1 == 0) |
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247 sz = 1; |
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248 inits.push_back(LLConstant::getNullValue(LLIntegerType::get(sz*8))); |
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249 pos += sz; |
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250 diff -= sz; |
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251 } while (pos < offset); |
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252 |
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253 assert(pos == offset); |
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254 } |
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255 |
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256 void IrStruct::buildDefaultConstInit(std::vector<llvm::Constant*>& inits) |
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257 { |
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258 assert(!defaultFound); |
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259 defaultFound = true; |
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260 |
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261 const llvm::StructType* structtype = isaStruct(aggrdecl->type->ir.type->get()); |
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262 Logger::cout() << "struct type: " << *structtype << '\n'; |
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263 |
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264 size_t lastoffset = 0; |
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265 size_t lastsize = 0; |
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266 |
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267 { |
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268 Logger::println("Find the default fields"); |
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269 LOG_SCOPE; |
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270 |
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271 // go through all vars and find the ones that contribute to the default |
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272 size_t nvars = varDecls.size(); |
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273 for (size_t i=0; i<nvars; i++) |
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274 { |
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275 VarDeclaration* var = varDecls[i]; |
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276 |
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277 Logger::println("field %s %s = %s : +%u", var->type->toChars(), var->toChars(), var->init ? var->init->toChars() : var->type->defaultInit(var->loc)->toChars(), var->offset); |
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278 |
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279 // only add vars that don't overlap |
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280 size_t offset = var->offset; |
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281 size_t size = var->type->size(); |
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282 if (offset >= lastoffset+lastsize) |
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283 { |
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284 Logger::println(" added"); |
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285 lastoffset = offset; |
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286 lastsize = size; |
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287 defVars.push_back(var); |
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288 } |
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289 } |
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290 } |
797
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291 |
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292 { |
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293 Logger::println("Build the default initializer"); |
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294 LOG_SCOPE; |
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295 |
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296 lastoffset = 0; |
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297 lastsize = 0; |
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298 |
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299 // go through the default vars and build the default constant initializer |
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300 // adding zeros along the way to live up to alignment expectations |
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301 size_t nvars = defVars.size(); |
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302 for (size_t i=0; i<nvars; i++) |
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303 { |
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304 VarDeclaration* var = defVars[i]; |
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305 |
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306 Logger::println("field %s %s = %s : +%u", var->type->toChars(), var->toChars(), var->init ? var->init->toChars() : var->type->defaultInit(var->loc)->toChars(), var->offset); |
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307 |
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308 // get offset and size |
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309 size_t offset = var->offset; |
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310 size_t size = var->type->size(); |
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311 |
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312 // is there space in between last last offset and this one? |
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313 // if so, fill it with zeros |
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314 if (offset > lastoffset+lastsize) |
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315 { |
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316 size_t pos = lastoffset + lastsize; |
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317 addZeros(inits, pos, offset); |
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318 } |
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319 |
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320 // add the field |
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321 assert(var->ir.irField->constInit); |
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322 inits.push_back(var->ir.irField->constInit); |
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323 |
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324 lastoffset = offset; |
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325 lastsize = var->type->size(); |
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326 } |
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327 |
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328 // there might still be padding after the last one, make sure that is zeroed as well |
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329 // is there space in between last last offset and this one? |
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330 size_t structsize = getABITypeSize(structtype); |
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331 |
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332 if (structsize > lastoffset+lastsize) |
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333 { |
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334 size_t pos = lastoffset + lastsize; |
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335 addZeros(inits, pos, structsize); |
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336 } |
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337 } |
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338 } |
797
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339 |
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340 LLConstant* IrStruct::buildDefaultConstInit() |
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341 { |
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342 // doesn't work for classes, they add stuff before and maybe after data fields |
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343 assert(!aggrdecl->isClassDeclaration()); |
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344 |
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345 // initializer llvm constant list |
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346 std::vector<LLConstant*> inits; |
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347 |
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348 // just start with an empty list |
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349 buildDefaultConstInit(inits); |
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350 |
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351 // build the constant |
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352 // note that the type matches the initializer, not the aggregate in cases with unions |
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353 LLConstant* c = LLConstantStruct::get(inits, aggrdecl->ir.irStruct->packed); |
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354 Logger::cout() << "llvm constant: " << *c << '\n'; |
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355 // assert(0); |
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356 return c; |
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357 } |