Mercurial > projects > ldc
annotate gen/structs.cpp @ 1327:49fd0c8040e6
Added reference to DMD bug for latest dstress "regressions" compile/m/mixin_29_E.d and compile/m/mixin_29_F.d .
author | Tomas Lindquist Olsen <tomas.l.olsen gmail com> |
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date | Sun, 10 May 2009 00:50:35 +0200 |
parents | c8b9406d84ca |
children | 45aca7e7cc88 |
rev | line source |
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1 #include <algorithm> |
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2 |
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3 #include "gen/llvm.h" |
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4 |
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5 #include "mtype.h" |
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6 #include "aggregate.h" |
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7 #include "init.h" |
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8 #include "declaration.h" |
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9 |
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10 #include "gen/irstate.h" |
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11 #include "gen/tollvm.h" |
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12 #include "gen/llvmhelpers.h" |
88
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13 #include "gen/arrays.h" |
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14 #include "gen/logger.h" |
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15 #include "gen/structs.h" |
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16 #include "gen/dvalue.h" |
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17 #include "gen/functions.h" |
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18 #include "gen/utils.h" |
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19 |
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20 #include "ir/irstruct.h" |
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21 #include "ir/irtypestruct.h" |
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22 |
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23 ////////////////////////////////////////////////////////////////////////////////////////// |
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24 |
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[svn r106] Turns out the last commit wasn't enough, now the D->LLVM process is even more split up.
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25 void DtoResolveStruct(StructDeclaration* sd) |
100 | 26 { |
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27 // don't do anything if already been here |
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28 if (sd->ir.resolved) return; |
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29 // make sure above works :P |
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30 sd->ir.resolved = true; |
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32 // log what we're doing |
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33 Logger::println("Resolving struct type: %s (%s)", sd->toChars(), sd->loc.toChars()); |
100 | 34 LOG_SCOPE; |
35 | |
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36 // make sure type exists |
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37 DtoType(sd->type); |
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38 |
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39 // if it's a forward declaration, all bets are off. The type should be enough |
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40 if (sd->sizeok != 1) |
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41 return; |
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42 |
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43 // create the IrStruct |
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44 IrStruct* irstruct = new IrStruct(sd); |
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45 sd->ir.irStruct = irstruct; |
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46 |
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47 // make sure all fields really get their ir field |
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48 ArrayIter<VarDeclaration> it(sd->fields); |
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49 for (; !it.done(); it.next()) |
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50 { |
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51 VarDeclaration* vd = it.get(); |
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52 if (vd->ir.irField == NULL) { |
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53 new IrField(vd); |
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54 } else { |
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55 IF_LOG Logger::println("struct field already exists!!!"); |
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56 } |
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57 } |
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58 |
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59 // perform definition |
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60 bool needs_def = mustDefineSymbol(sd); |
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61 if (needs_def) |
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62 { |
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63 // emit the initZ symbol |
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64 LLGlobalVariable* initZ = irstruct->getInitSymbol(); |
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65 |
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66 // set initZ initializer |
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67 initZ->setInitializer(irstruct->getDefaultInit()); |
100 | 68 } |
69 | |
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70 // emit members |
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71 if (sd->members) |
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72 { |
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73 ArrayIter<Dsymbol> it(*sd->members); |
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74 while (!it.done()) |
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75 { |
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76 Dsymbol* member = it.get(); |
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77 if (member) |
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78 member->codegen(Type::sir); |
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79 it.next(); |
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80 } |
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82 |
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83 if (needs_def) |
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84 { |
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85 // emit typeinfo |
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86 DtoTypeInfoOf(sd->type); |
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87 } |
100 | 88 } |
89 | |
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90 ////////////////////////////////////////////////////////////////////////////////////////// |
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91 //////////////////////////// D STRUCT UTILITIES //////////////////////////////////// |
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92 ////////////////////////////////////////////////////////////////////////////////////////// |
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93 |
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94 LLValue* DtoStructEquals(TOK op, DValue* lhs, DValue* rhs) |
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95 { |
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96 Type* t = lhs->getType()->toBasetype(); |
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97 assert(t->ty == Tstruct); |
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98 |
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99 // set predicate |
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100 llvm::ICmpInst::Predicate cmpop; |
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101 if (op == TOKequal || op == TOKidentity) |
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102 cmpop = llvm::ICmpInst::ICMP_EQ; |
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103 else |
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104 cmpop = llvm::ICmpInst::ICMP_NE; |
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105 |
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106 // call memcmp |
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107 size_t sz = getTypePaddedSize(DtoType(t)); |
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108 LLValue* val = DtoMemCmp(lhs->getRVal(), rhs->getRVal(), DtoConstSize_t(sz)); |
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109 return gIR->ir->CreateICmp(cmpop, val, LLConstantInt::get(val->getType(), 0, false), "tmp"); |
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110 } |
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111 |
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112 ////////////////////////////////////////////////////////////////////////////////////////// |
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113 |
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114 LLValue* DtoIndexStruct(LLValue* src, StructDeclaration* sd, VarDeclaration* vd) |
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115 { |
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116 Logger::println("indexing struct field %s:", vd->toPrettyChars()); |
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117 LOG_SCOPE; |
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118 |
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119 DtoResolveStruct(sd); |
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120 |
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121 // vd must be a field |
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122 IrField* field = vd->ir.irField; |
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123 assert(field); |
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124 |
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125 // get the start pointer |
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126 const LLType* st = getPtrToType(DtoType(sd->type)); |
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127 |
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128 // cast to the formal struct type |
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129 src = DtoBitCast(src, st); |
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130 |
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131 // gep to the index |
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132 LLValue* val = DtoGEPi(src, 0, field->index); |
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133 |
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134 // do we need to offset further? (union area) |
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135 if (field->unionOffset) |
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136 { |
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137 // cast to void* |
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138 val = DtoBitCast(val, getVoidPtrType()); |
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139 // offset |
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140 val = DtoGEPi1(val, field->unionOffset); |
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141 } |
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142 |
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143 // cast it to the right type |
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144 val = DtoBitCast(val, getPtrToType(DtoType(vd->type))); |
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145 |
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146 if (Logger::enabled()) |
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147 Logger::cout() << "value: " << *val << '\n'; |
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148 |
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149 return val; |
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150 } |
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151 |
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152 ////////////////////////////////////////////////////////////////////////////////////////// |
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153 |
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154 // helper function that adds zero bytes to a vector of constants |
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155 size_t add_zeros(std::vector<llvm::Value*>& values, size_t diff) |
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156 { |
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157 size_t n = values.size(); |
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158 bool is64 = global.params.is64bit; |
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159 while (diff) |
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160 { |
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161 if (is64 && diff % 8 == 0) |
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162 { |
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163 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int64Ty)); |
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164 diff -= 8; |
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165 } |
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166 else if (diff % 4 == 0) |
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167 { |
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168 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int32Ty)); |
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169 diff -= 4; |
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170 } |
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171 else if (diff % 2 == 0) |
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172 { |
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173 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int16Ty)); |
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174 diff -= 2; |
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175 } |
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176 else |
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177 { |
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178 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int8Ty)); |
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179 diff -= 1; |
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180 } |
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181 } |
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182 return values.size() - n; |
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183 } |
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184 |
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185 std::vector<llvm::Value*> DtoStructLiteralValues(const StructDeclaration* sd, const std::vector<llvm::Value*>& inits) |
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186 { |
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187 // get arrays |
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188 size_t nvars = sd->fields.dim; |
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189 VarDeclaration** vars = (VarDeclaration**)sd->fields.data; |
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190 |
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191 assert(inits.size() == nvars); |
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192 |
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193 // first locate all explicit initializers |
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194 std::vector<VarDeclaration*> explicitInits; |
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195 for (size_t i=0; i < nvars; i++) |
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196 { |
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197 if (inits[i]) |
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198 { |
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199 explicitInits.push_back(vars[i]); |
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200 } |
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201 } |
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202 |
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203 // vector of values to build aggregate from |
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204 std::vector<llvm::Value*> values; |
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205 |
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206 // offset trackers |
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207 size_t lastoffset = 0; |
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208 size_t lastsize = 0; |
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209 |
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210 // index of next explicit init |
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211 size_t exidx = 0; |
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212 // number of explicit inits |
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213 size_t nex = explicitInits.size(); |
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214 |
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215 // for through each field and build up the struct, padding with zeros |
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216 size_t i; |
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217 for (i=0; i<nvars; i++) |
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218 { |
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219 VarDeclaration* var = vars[i]; |
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220 |
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221 // get var info |
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222 size_t os = var->offset; |
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223 size_t sz = var->type->size(); |
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224 |
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225 // get next explicit |
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226 VarDeclaration* nextVar = NULL; |
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227 size_t nextOs = 0; |
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228 if (exidx < nex) |
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229 { |
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230 nextVar = explicitInits[exidx]; |
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231 nextOs = nextVar->offset; |
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232 } |
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233 // none, rest is defaults |
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234 else |
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235 { |
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236 break; |
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237 } |
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238 |
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239 // not explicit initializer, default initialize if there is room, otherwise skip |
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240 if (!inits[i]) |
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241 { |
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242 // default init if there is room |
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243 // (past current offset) and (small enough to fit before next explicit) |
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244 if ((os >= lastoffset + lastsize) && (os+sz <= nextOs)) |
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245 { |
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246 // add any 0 padding needed before this field |
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247 if (os > lastoffset + lastsize) |
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248 { |
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249 //printf("1added %lu zeros\n", os - lastoffset - lastsize); |
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250 add_zeros(values, os - lastoffset - lastsize); |
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251 } |
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252 |
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253 // get field default init |
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254 IrField* f = var->ir.irField; |
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255 assert(f); |
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256 values.push_back(f->getDefaultInit()); |
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257 |
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258 lastoffset = os; |
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259 lastsize = sz; |
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260 //printf("added default: %s : %lu (%lu)\n", var->toChars(), os, sz); |
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261 } |
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262 // skip |
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263 continue; |
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264 } |
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265 |
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266 assert(nextVar == var); |
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267 |
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268 // add any 0 padding needed before this field |
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269 if (os > lastoffset + lastsize) |
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270 { |
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271 //printf("added %lu zeros\n", os - lastoffset - lastsize); |
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272 add_zeros(values, os - lastoffset - lastsize); |
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273 } |
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274 |
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275 // add the expression value |
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276 values.push_back(inits[i]); |
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277 |
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278 // update offsets |
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279 lastoffset = os; |
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280 lastsize = sz; |
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281 |
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282 // go to next explicit init |
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283 exidx++; |
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284 |
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285 //printf("added field: %s : %lu (%lu)\n", var->toChars(), os, sz); |
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286 } |
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287 |
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288 // fill out rest with default initializers |
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289 const LLType* structtype = DtoType(sd->type); |
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290 size_t structsize = getTypePaddedSize(structtype); |
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291 |
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292 // FIXME: this could probably share some code with the above |
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293 if (structsize > lastoffset+lastsize) |
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294 { |
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295 for (/*continue from first loop*/; i < nvars; i++) |
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296 { |
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297 VarDeclaration* var = vars[i]; |
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298 |
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299 // get var info |
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300 size_t os = var->offset; |
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301 size_t sz = var->type->size(); |
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302 |
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303 // skip? |
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304 if (os < lastoffset + lastsize) |
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305 continue; |
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306 |
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307 // add any 0 padding needed before this field |
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308 if (os > lastoffset + lastsize) |
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309 { |
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310 //printf("2added %lu zeros\n", os - lastoffset - lastsize); |
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311 add_zeros(values, os - lastoffset - lastsize); |
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312 } |
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313 |
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314 // get field default init |
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315 IrField* f = var->ir.irField; |
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316 assert(f); |
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317 values.push_back(f->getDefaultInit()); |
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318 |
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319 lastoffset = os; |
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320 lastsize = sz; |
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321 //printf("2added default: %s : %lu (%lu)\n", var->toChars(), os, sz); |
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322 } |
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323 } |
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324 |
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325 // add any 0 padding needed at the end of the literal |
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326 if (structsize > lastoffset+lastsize) |
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327 { |
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328 //printf("3added %lu zeros\n", structsize - lastoffset - lastsize); |
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329 add_zeros(values, structsize - lastoffset - lastsize); |
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330 } |
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331 |
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332 return values; |
1312
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333 } |
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334 |