Mercurial > projects > ldc
annotate gen/structs.cpp @ 1282:680b4df0ea36
Commit workaround for TypeFunction comparing issue.
author | Christian Kamm <kamm incasoftware de> |
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date | Thu, 30 Apr 2009 23:16:21 +0200 |
parents | 8fb39f7f1a7c |
children | 0c03ba6f7c24 |
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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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 // perform definition |
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48 bool needs_def = mustDefineSymbol(sd); |
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49 if (needs_def) |
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50 { |
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51 // emit the initZ symbol |
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52 LLGlobalVariable* initZ = irstruct->getInitSymbol(); |
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53 |
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54 // set initZ initializer |
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55 initZ->setInitializer(irstruct->getDefaultInit()); |
100 | 56 } |
57 | |
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58 // emit members |
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59 if (sd->members) |
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60 { |
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61 ArrayIter<Dsymbol> it(*sd->members); |
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62 while (!it.done()) |
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63 { |
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64 Dsymbol* member = it.get(); |
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65 if (member) |
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66 member->codegen(Type::sir); |
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67 it.next(); |
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68 } |
100 | 69 } |
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70 |
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71 if (needs_def) |
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72 { |
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73 // emit typeinfo |
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74 DtoTypeInfoOf(sd->type); |
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75 } |
100 | 76 } |
77 | |
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78 ////////////////////////////////////////////////////////////////////////////////////////// |
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79 //////////////////////////// D STRUCT UTILITIES //////////////////////////////////// |
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80 ////////////////////////////////////////////////////////////////////////////////////////// |
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81 |
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82 LLValue* DtoStructEquals(TOK op, DValue* lhs, DValue* rhs) |
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83 { |
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84 Type* t = lhs->getType()->toBasetype(); |
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85 assert(t->ty == Tstruct); |
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86 |
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87 // set predicate |
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88 llvm::ICmpInst::Predicate cmpop; |
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89 if (op == TOKequal || op == TOKidentity) |
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90 cmpop = llvm::ICmpInst::ICMP_EQ; |
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91 else |
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92 cmpop = llvm::ICmpInst::ICMP_NE; |
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93 |
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94 // call memcmp |
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95 size_t sz = getTypePaddedSize(DtoType(t)); |
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96 LLValue* val = DtoMemCmp(lhs->getRVal(), rhs->getRVal(), DtoConstSize_t(sz)); |
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97 return gIR->ir->CreateICmp(cmpop, val, LLConstantInt::get(val->getType(), 0, false), "tmp"); |
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98 } |
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99 |
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100 ////////////////////////////////////////////////////////////////////////////////////////// |
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101 |
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102 LLValue* DtoIndexStruct(LLValue* src, StructDeclaration* sd, VarDeclaration* vd) |
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103 { |
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104 Logger::println("indexing struct field %s:", vd->toPrettyChars()); |
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105 LOG_SCOPE; |
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106 |
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107 DtoResolveStruct(sd); |
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108 |
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109 // vd must be a field |
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110 IrField* field = vd->ir.irField; |
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111 assert(field); |
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112 |
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113 // get the start pointer |
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114 const LLType* st = getPtrToType(DtoType(sd->type)); |
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115 |
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116 // cast to the formal struct type |
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117 src = DtoBitCast(src, st); |
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118 |
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119 // gep to the index |
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120 LLValue* val = DtoGEPi(src, 0, field->index); |
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121 |
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122 // do we need to offset further? (union area) |
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123 if (field->unionOffset) |
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124 { |
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125 // cast to void* |
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126 val = DtoBitCast(val, getVoidPtrType()); |
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127 // offset |
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128 val = DtoGEPi1(val, field->unionOffset); |
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129 } |
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130 |
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131 // cast it to the right type |
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132 val = DtoBitCast(val, getPtrToType(DtoType(vd->type))); |
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133 |
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134 if (Logger::enabled()) |
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135 Logger::cout() << "value: " << *val << '\n'; |
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136 |
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137 return val; |
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138 } |
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139 |
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140 ////////////////////////////////////////////////////////////////////////////////////////// |
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141 |
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142 // helper function that adds zero bytes to a vector of constants |
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143 size_t add_zeros(std::vector<llvm::Value*>& values, size_t diff) |
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144 { |
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145 size_t n = values.size(); |
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146 bool is64 = global.params.is64bit; |
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147 while (diff) |
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148 { |
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149 if (is64 && diff % 8 == 0) |
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150 { |
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151 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int64Ty)); |
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152 diff -= 8; |
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153 } |
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154 else if (diff % 4 == 0) |
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155 { |
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156 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int32Ty)); |
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157 diff -= 4; |
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158 } |
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159 else if (diff % 2 == 0) |
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160 { |
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161 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int16Ty)); |
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162 diff -= 2; |
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163 } |
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164 else |
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165 { |
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166 values.push_back(llvm::Constant::getNullValue(llvm::Type::Int8Ty)); |
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167 diff -= 1; |
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168 } |
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169 } |
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170 return values.size() - n; |
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171 } |
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172 |
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173 std::vector<llvm::Value*> DtoStructLiteralValues(const StructDeclaration* sd, const std::vector<llvm::Value*>& inits) |
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174 { |
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175 // get arrays |
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176 size_t nvars = sd->fields.dim; |
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177 VarDeclaration** vars = (VarDeclaration**)sd->fields.data; |
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178 |
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179 assert(inits.size() == nvars); |
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180 |
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181 // first locate all explicit initializers |
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182 std::vector<VarDeclaration*> explicitInits; |
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183 for (size_t i=0; i < nvars; i++) |
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184 { |
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185 if (inits[i]) |
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186 { |
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187 explicitInits.push_back(vars[i]); |
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188 } |
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189 } |
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190 |
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191 // vector of values to build aggregate from |
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192 std::vector<llvm::Value*> values; |
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193 |
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194 // offset trackers |
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195 size_t lastoffset = 0; |
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196 size_t lastsize = 0; |
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197 |
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198 // index of next explicit init |
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199 size_t exidx = 0; |
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200 // number of explicit inits |
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201 size_t nex = explicitInits.size(); |
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202 |
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203 // for through each field and build up the struct, padding with zeros |
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204 size_t i; |
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205 for (i=0; i<nvars; i++) |
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206 { |
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207 VarDeclaration* var = vars[i]; |
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208 |
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209 // get var info |
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210 size_t os = var->offset; |
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211 size_t sz = var->type->size(); |
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212 |
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213 // get next explicit |
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214 VarDeclaration* nextVar = NULL; |
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215 size_t nextOs = 0; |
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216 if (exidx < nex) |
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217 { |
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218 nextVar = explicitInits[exidx]; |
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219 nextOs = nextVar->offset; |
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220 } |
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221 // none, rest is defaults |
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222 else |
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223 { |
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224 break; |
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225 } |
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226 |
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227 // not explicit initializer, default initialize if there is room, otherwise skip |
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228 if (!inits[i]) |
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229 { |
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230 // default init if there is room |
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231 // (past current offset) and (small enough to fit before next explicit) |
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232 if ((os >= lastoffset + lastsize) && (os+sz <= nextOs)) |
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233 { |
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234 // add any 0 padding needed before this field |
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235 if (os > lastoffset + lastsize) |
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236 { |
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237 //printf("1added %lu zeros\n", os - lastoffset - lastsize); |
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238 add_zeros(values, os - lastoffset - lastsize); |
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239 } |
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240 |
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241 // get field default init |
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242 IrField* f = var->ir.irField; |
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243 assert(f); |
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244 values.push_back(f->getDefaultInit()); |
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245 |
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246 lastoffset = os; |
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247 lastsize = sz; |
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248 //printf("added default: %s : %lu (%lu)\n", var->toChars(), os, sz); |
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249 } |
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250 // skip |
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251 continue; |
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252 } |
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253 |
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254 assert(nextVar == var); |
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255 |
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256 // add any 0 padding needed before this field |
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257 if (os > lastoffset + lastsize) |
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258 { |
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259 //printf("added %lu zeros\n", os - lastoffset - lastsize); |
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260 add_zeros(values, os - lastoffset - lastsize); |
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261 } |
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262 |
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263 // add the expression value |
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264 values.push_back(inits[i]); |
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265 |
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266 // update offsets |
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267 lastoffset = os; |
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268 lastsize = sz; |
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269 |
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270 // go to next explicit init |
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271 exidx++; |
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272 |
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273 //printf("added field: %s : %lu (%lu)\n", var->toChars(), os, sz); |
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274 } |
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275 |
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276 // fill out rest with default initializers |
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277 const LLType* structtype = DtoType(sd->type); |
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278 size_t structsize = getTypePaddedSize(structtype); |
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279 |
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280 // FIXME: this could probably share some code with the above |
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281 if (structsize > lastoffset+lastsize) |
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282 { |
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283 for (/*continue from first loop*/; i < nvars; i++) |
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284 { |
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285 VarDeclaration* var = vars[i]; |
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286 |
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287 // get var info |
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288 size_t os = var->offset; |
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289 size_t sz = var->type->size(); |
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290 |
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291 // skip? |
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292 if (os < lastoffset + lastsize) |
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293 continue; |
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294 |
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295 // add any 0 padding needed before this field |
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296 if (os > lastoffset + lastsize) |
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297 { |
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298 //printf("2added %lu zeros\n", os - lastoffset - lastsize); |
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299 add_zeros(values, os - lastoffset - lastsize); |
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300 } |
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301 |
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302 // get field default init |
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303 IrField* f = var->ir.irField; |
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304 assert(f); |
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305 values.push_back(f->getDefaultInit()); |
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306 |
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307 lastoffset = os; |
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308 lastsize = sz; |
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309 //printf("2added default: %s : %lu (%lu)\n", var->toChars(), os, sz); |
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310 } |
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311 } |
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312 |
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313 // add any 0 padding needed at the end of the literal |
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314 if (structsize > lastoffset+lastsize) |
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315 { |
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316 //printf("3added %lu zeros\n", structsize - lastoffset - lastsize); |
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317 add_zeros(values, structsize - lastoffset - lastsize); |
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318 } |
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319 |
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320 return values; |
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321 } |