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annotate gen/declarations.cpp @ 1168:ab186e535e72

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A different fix to #218 and DMD2682 that does not lead to constant folding regressions. Fixes run/const_15, run/c/const_16_B. The price is removing the lvalueness of struct literals. If it turns out too much code depends on this behavior or we don't want to break with DMD, we could keep struct literals as lvalues and instead convert struct literals used as expression initializers into struct initializers.
author Christian Kamm <kamm incasoftware de>
date Sun, 29 Mar 2009 11:43:45 +0200
parents 5ebe8224988b
children 79758fd2f48a
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1 #include "gen/llvm.h"
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2
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3 #include "aggregate.h"
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4 #include "declaration.h"
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5 #include "enum.h"
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6 #include "id.h"
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7 #include "mem.h"
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8 #include "template.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"
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13 #include "gen/logger.h"
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14
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15 #include "ir/ir.h"
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16 #include "ir/irvar.h"
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17
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18 /* ================================================================== */
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19
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20 void Dsymbol::codegen(Ir*)
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21 {
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22 Logger::println("Ignoring Dsymbol::toObjFile for %s", toChars());
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23 }
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24
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25 /* ================================================================== */
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26
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27 void Declaration::codegen(Ir*)
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28 {
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29 Logger::println("Ignoring Declaration::toObjFile for %s", toChars());
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30 }
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31
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32 /* ================================================================== */
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33
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34 void InterfaceDeclaration::codegen(Ir*)
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35 {
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36 //Logger::println("Ignoring InterfaceDeclaration::toObjFile for %s", toChars());
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37 DtoResolveDsymbol(this);
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38 }
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39
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40 /* ================================================================== */
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41
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42 void StructDeclaration::codegen(Ir*)
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43 {
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44 DtoResolveDsymbol(this);
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45 }
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46
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47 /* ================================================================== */
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48
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49 void ClassDeclaration::codegen(Ir*)
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50 {
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51 DtoResolveDsymbol(this);
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52 }
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53
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54 /* ================================================================== */
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55
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56 void TupleDeclaration::codegen(Ir* p)
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57 {
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58 Logger::println("TupleDeclaration::toObjFile(): %s", toChars());
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59
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60 assert(isexp);
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61 assert(objects);
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62
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63 int n = objects->dim;
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64
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65 for (int i=0; i < n; ++i)
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66 {
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67 DsymbolExp* exp = (DsymbolExp*)objects->data[i];
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68 assert(exp->op == TOKdsymbol);
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69 exp->s->codegen(p);
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70 }
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71 }
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72
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73 /* ================================================================== */
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74
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75 void VarDeclaration::codegen(Ir* p)
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76 {
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77 Logger::print("VarDeclaration::toObjFile(): %s | %s\n", toChars(), type->toChars());
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78 LOG_SCOPE;
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79
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80 if (aliassym)
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81 {
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82 Logger::println("alias sym");
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83 toAlias()->codegen(p);
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84 return;
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85 }
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86
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87 if (AggregateDeclaration* ad = isMember())
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88 ad->codegen(p);
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89
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90 // global variable or magic
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91 #if DMDV2
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92 // taken from dmd2/structs
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93 if (isDataseg() || (storage_class & (STCconst | STCinvariant) && init))
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94 #else
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95 if (isDataseg())
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96 #endif
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97 {
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98 Logger::println("data segment");
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99
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100 #if DMDV2
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101 if (storage_class & STCmanifest)
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102 {
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103 assert(0 && "manifest constant being codegened!!!");
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104 }
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105 #endif
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106
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107 // don't duplicate work
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108 if (this->ir.resolved) return;
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109 this->ir.resolved = true;
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110 this->ir.declared = true;
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111
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112 this->ir.irGlobal = new IrGlobal(this);
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113
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114 Logger::println("parent: %s (%s)", parent->toChars(), parent->kind());
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115
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116 #if DMDV2
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117 // not sure why this is only needed for d2
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118 bool _isconst = isConst() && init;
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119 #else
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120 bool _isconst = isConst();
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121 #endif
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122
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123
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124 Logger::println("Creating global variable");
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125
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126 const LLType* _type = this->ir.irGlobal->type.get();
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127 llvm::GlobalValue::LinkageTypes _linkage = DtoLinkage(this);
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128 std::string _name(mangle());
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129
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130 llvm::GlobalVariable* gvar = new llvm::GlobalVariable(_type,_isconst,_linkage,NULL,_name,gIR->module);
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131 this->ir.irGlobal->value = gvar;
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132
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diff changeset
133 if (Logger::enabled())
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diff changeset
134 Logger::cout() << *gvar << '\n';
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135
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diff changeset
136 // if this global is used from a nested function, this is necessary or
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137 // optimization could potentially remove the global (if it's the only use)
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138 if (nakedUse)
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diff changeset
139 gIR->usedArray.push_back(DtoBitCast(gvar, getVoidPtrType()));
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140
1149
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141 // don't initialize static struct members yet, they might be of the struct type
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142 // which doesn't have a static initializer yet.
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143 if (AggregateDeclaration* ad = isMember())
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144 ad->ir.irStruct->staticVars.push_back(this);
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145 else
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146 DtoConstInitGlobal(this);
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147 }
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148 else
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149 {
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150 // might already have its irField, as classes derive each other without getting copies of the VarDeclaration
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151 if (!ir.irField)
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152 {
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153 assert(!ir.isSet());
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154 ir.irField = new IrField(this);
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155 }
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156 IrStruct* irstruct = gIR->topstruct();
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157 irstruct->addVar(this);
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158
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159 Logger::println("added offset %u", offset);
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160 }
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161 }
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162
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163 /* ================================================================== */
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164
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165 void TypedefDeclaration::codegen(Ir*)
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166 {
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167 static int tdi = 0;
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168 Logger::print("TypedefDeclaration::toObjFile(%d): %s\n", tdi++, toChars());
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169 LOG_SCOPE;
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170
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171 // generate typeinfo
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172 DtoTypeInfoOf(type, false);
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173 }
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174
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175 /* ================================================================== */
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176
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177 void EnumDeclaration::codegen(Ir*)
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178 {
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179 Logger::println("Ignoring EnumDeclaration::toObjFile for %s", toChars());
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180 }
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181
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diff changeset
182 /* ================================================================== */
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183
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184 void FuncDeclaration::codegen(Ir*)
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185 {
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186 DtoResolveDsymbol(this);
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187 }
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188
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189 /* ================================================================== */
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190
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191 void AnonDeclaration::codegen(Ir* p)
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192 {
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193 Array *d = include(NULL, NULL);
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194
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195 if (d)
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196 {
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197 // get real aggregate parent
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198 IrStruct* irstruct = gIR->topstruct();
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199
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200 // push a block on the stack
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diff changeset
201 irstruct->pushAnon(isunion);
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202
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diff changeset
203 // go over children
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diff changeset
204 for (unsigned i = 0; i < d->dim; i++)
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205 { Dsymbol *s = (Dsymbol *)d->data[i];
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diff changeset
206 s->codegen(p);
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diff changeset
207 }
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208
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parents:
diff changeset
209 // finish
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diff changeset
210 irstruct->popAnon();
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parents:
diff changeset
211 }
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parents:
diff changeset
212 }
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213
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parents:
diff changeset
214 /* ================================================================== */
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215
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diff changeset
216 void TemplateInstance::codegen(Ir* p)
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217 {
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diff changeset
218 #if LOG
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diff changeset
219 printf("TemplateInstance::toObjFile('%s', this = %p)\n", toChars(), this);
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diff changeset
220 #endif
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parents:
diff changeset
221 if (!errors && members)
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diff changeset
222 {
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diff changeset
223 for (int i = 0; i < members->dim; i++)
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diff changeset
224 {
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diff changeset
225 Dsymbol *s = (Dsymbol *)members->data[i];
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diff changeset
226 s->codegen(p);
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diff changeset
227 }
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diff changeset
228 }
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229 }
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230
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parents:
diff changeset
231 /* ================================================================== */
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diff changeset
232
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diff changeset
233 void TemplateMixin::codegen(Ir* p)
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diff changeset
234 {
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diff changeset
235 TemplateInstance::codegen(p);
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diff changeset
236 }
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237
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parents:
diff changeset
238 /* ================================================================== */
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diff changeset
239
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diff changeset
240 void AttribDeclaration::codegen(Ir* p)
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diff changeset
241 {
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diff changeset
242 Array *d = include(NULL, NULL);
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243
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diff changeset
244 if (d)
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diff changeset
245 {
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diff changeset
246 for (unsigned i = 0; i < d->dim; i++)
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247 { Dsymbol *s = (Dsymbol *)d->data[i];
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248 s->codegen(p);
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parents:
diff changeset
249 }
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diff changeset
250 }
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diff changeset
251 }
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252
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diff changeset
253 /* ================================================================== */
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254
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255 void obj_includelib(const char* lib);
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256
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257 void PragmaDeclaration::codegen(Ir* p)
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258 {
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259 if (ident == Id::lib)
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260 {
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261 assert(args && args->dim == 1);
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262
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263 Expression *e = (Expression *)args->data[0];
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264
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265 assert(e->op == TOKstring);
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266
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267 StringExp *se = (StringExp *)e;
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268 char *name = (char *)mem.malloc(se->len + 1);
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269 memcpy(name, se->string, se->len);
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270 name[se->len] = 0;
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271 obj_includelib(name);
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272 }
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273 AttribDeclaration::codegen(p);
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274 }
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275
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276 /* ================================================================== */