Mercurial > projects > ldc
annotate ir/irtypeclass.cpp @ 1283:450897f5aae9
Remove some dead code.
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Sat, 02 May 2009 11:58:50 +0200 |
parents | 8fb39f7f1a7c |
children | 0c03ba6f7c24 |
rev | line source |
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1 #include "llvm/DerivedTypes.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 "dsymbol.h" |
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6 #include "mtype.h" |
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7 |
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8 #include "gen/irstate.h" |
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9 #include "gen/logger.h" |
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10 #include "gen/tollvm.h" |
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11 #include "gen/utils.h" |
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12 #include "ir/irtypeclass.h" |
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13 |
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14 ////////////////////////////////////////////////////////////////////////////// |
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15 |
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16 extern size_t add_zeros(std::vector<const llvm::Type*>& defaultTypes, size_t diff); |
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17 extern bool var_offset_sort_cb(const VarDeclaration* v1, const VarDeclaration* v2); |
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18 |
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19 ////////////////////////////////////////////////////////////////////////////// |
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20 |
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21 IrTypeClass::IrTypeClass(ClassDeclaration* cd) |
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22 : IrTypeAggr(cd), |
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23 cd(cd), |
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24 tc((TypeClass*)cd->type), |
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25 vtbl_pa(llvm::OpaqueType::get()) |
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26 { |
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27 vtbl_size = cd->vtbl.dim; |
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28 num_interface_vtbls = 0; |
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29 } |
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30 |
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31 ////////////////////////////////////////////////////////////////////////////// |
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32 |
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33 void IrTypeClass::addBaseClassData( |
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34 std::vector< const llvm::Type * > & defaultTypes, |
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35 ClassDeclaration * base, |
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36 size_t & offset, |
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37 size_t & field_index) |
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38 { |
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39 if (base->baseClass) |
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40 { |
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41 addBaseClassData(defaultTypes, base->baseClass, offset, field_index); |
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42 } |
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43 |
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44 // FIXME: merge code with structs in IrTypeAggr |
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45 |
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46 // mirror the sd->fields array but only fill in contributors |
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47 size_t n = base->fields.dim; |
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48 LLSmallVector<VarDeclaration*, 16> data(n, NULL); |
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49 default_fields.reserve(n); |
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50 |
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51 // first fill in the fields with explicit initializers |
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52 VarDeclarationIter field_it(base->fields); |
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53 for (; field_it.more(); field_it.next()) |
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54 { |
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55 // init is !null for explicit inits |
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56 if (field_it->init != NULL) |
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57 { |
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58 IF_LOG Logger::println("adding explicit initializer for struct field %s", |
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59 field_it->toChars()); |
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60 |
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61 data[field_it.index] = *field_it; |
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62 |
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63 size_t f_begin = field_it->offset; |
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64 size_t f_end = f_begin + field_it->type->size(); |
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65 |
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66 // make sure there is no overlap |
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67 for (size_t i = 0; i < field_it.index; i++) |
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68 { |
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69 if (data[i] != NULL) |
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70 { |
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71 VarDeclaration* vd = data[i]; |
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72 size_t v_begin = vd->offset; |
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73 size_t v_end = v_begin + vd->type->size(); |
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74 |
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75 if (v_begin >= f_end || v_end <= f_begin) |
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76 continue; |
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77 |
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78 base->error(vd->loc, "has overlapping initialization for %s and %s", |
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79 field_it->toChars(), vd->toChars()); |
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80 } |
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81 } |
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82 } |
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83 } |
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84 |
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85 if (global.errors) |
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86 { |
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87 fatal(); |
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88 } |
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89 |
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90 // fill in default initializers |
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91 field_it = VarDeclarationIter(base->fields); |
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92 for (;field_it.more(); field_it.next()) |
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93 { |
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94 if (data[field_it.index]) |
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95 continue; |
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96 |
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97 size_t f_begin = field_it->offset; |
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98 size_t f_end = f_begin + field_it->type->size(); |
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99 |
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100 // make sure it doesn't overlap anything explicit |
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101 bool overlaps = false; |
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102 for (size_t i = 0; i < n; i++) |
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103 { |
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104 if (data[i]) |
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105 { |
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106 size_t v_begin = data[i]->offset; |
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107 size_t v_end = v_begin + data[i]->type->size(); |
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108 |
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109 if (v_begin >= f_end || v_end <= f_begin) |
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110 continue; |
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111 |
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112 overlaps = true; |
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113 break; |
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114 } |
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115 } |
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116 |
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117 // if no overlap was found, add the default initializer |
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118 if (!overlaps) |
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119 { |
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120 IF_LOG Logger::println("adding default initializer for struct field %s", |
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121 field_it->toChars()); |
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122 data[field_it.index] = *field_it; |
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123 } |
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124 } |
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125 |
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126 // ok. now we can build a list of llvm types. and make sure zeros are inserted if necessary. |
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127 |
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128 // first we sort the list by offset |
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129 std::sort(data.begin(), data.end(), var_offset_sort_cb); |
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130 |
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131 // add types to list |
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132 for (size_t i = 0; i < n; i++) |
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133 { |
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134 VarDeclaration* vd = data[i]; |
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135 |
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136 if (vd == NULL) |
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137 continue; |
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138 |
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139 assert(vd->offset >= offset && "it's a bug..."); |
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140 |
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141 // add to default field list |
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142 if (cd == base) |
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143 default_fields.push_back(vd); |
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144 |
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145 // get next aligned offset for this type |
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146 size_t alignsize = vd->type->alignsize(); |
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147 size_t alignedoffset = (offset + alignsize - 1) & ~(alignsize - 1); |
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148 |
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149 // insert explicit padding? |
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150 if (alignedoffset < vd->offset) |
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151 { |
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152 field_index += add_zeros(defaultTypes, vd->offset - alignedoffset); |
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153 } |
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154 |
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155 // add default type |
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156 defaultTypes.push_back(DtoType(vd->type)); |
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157 |
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158 // advance offset to right past this field |
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159 offset = vd->offset + vd->type->size(); |
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160 |
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161 // create ir field |
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162 if (vd->ir.irField == NULL) |
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163 new IrField(vd, field_index); |
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164 else |
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165 assert(vd->ir.irField->index == field_index && |
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166 vd->ir.irField->unionOffset == 0 && |
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167 "inconsistent field data"); |
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168 field_index++; |
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169 } |
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170 |
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171 // make sure all fields really get their ir field |
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172 ArrayIter<VarDeclaration> it(base->fields); |
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173 for (; !it.done(); it.next()) |
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174 { |
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175 VarDeclaration* vd = it.get(); |
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176 if (vd->ir.irField == NULL) |
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177 new IrField(vd, 0, vd->offset); |
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178 } |
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179 |
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180 // any interface implementations? |
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181 if (base->vtblInterfaces && base->vtblInterfaces->dim > 0) |
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182 { |
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183 bool new_instances = (base == cd); |
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184 |
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185 ArrayIter<BaseClass> it2(*base->vtblInterfaces); |
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186 |
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187 VarDeclarationIter interfaces_idx(ClassDeclaration::classinfo->fields, 3); |
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188 Type* first = interfaces_idx->type->next->pointerTo(); |
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189 |
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190 // align offset |
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191 offset = (offset + PTRSIZE - 1) & ~(PTRSIZE - 1); |
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192 |
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193 for (; !it2.done(); it2.next()) |
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194 { |
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195 BaseClass* b = it2.get(); |
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196 IF_LOG Logger::println("Adding interface vtbl for %s", b->base->toPrettyChars()); |
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197 |
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198 Array arr; |
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199 b->fillVtbl(cd, &arr, new_instances); |
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200 |
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201 const llvm::Type* ivtbl_type = buildVtblType(first, &arr); |
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202 defaultTypes.push_back(llvm::PointerType::get(ivtbl_type, 0)); |
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203 |
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204 offset += PTRSIZE; |
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205 |
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206 // add to the interface map |
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207 addInterfaceToMap(b->base, field_index); |
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208 field_index++; |
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209 |
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210 // inc count |
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211 num_interface_vtbls++; |
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212 } |
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213 } |
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214 |
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215 #if 0 |
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216 // tail padding? |
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217 if (offset < base->structsize) |
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218 { |
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219 field_index += add_zeros(defaultTypes, base->structsize - offset); |
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220 offset = base->structsize; |
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221 } |
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222 #endif |
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223 } |
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224 |
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225 ////////////////////////////////////////////////////////////////////////////// |
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226 |
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227 const llvm::Type* IrTypeClass::buildType() |
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228 { |
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229 IF_LOG Logger::println("Building class type %s @ %s", cd->toPrettyChars(), cd->loc.toChars()); |
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230 LOG_SCOPE; |
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231 IF_LOG Logger::println("Instance size: %u", cd->structsize); |
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232 |
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233 // find the fields that contribute to the default initializer. |
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234 // these will define the default type. |
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235 |
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236 std::vector<const llvm::Type*> defaultTypes; |
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237 defaultTypes.reserve(32); |
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238 |
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239 // add vtbl |
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240 defaultTypes.push_back(llvm::PointerType::get(vtbl_pa.get(), 0)); |
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241 |
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242 // interfaces are just a vtable |
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243 if (cd->isInterfaceDeclaration()) |
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244 { |
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245 num_interface_vtbls = cd->vtblInterfaces ? cd->vtblInterfaces->dim : 0; |
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246 } |
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247 // classes have monitor and fields |
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248 else |
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249 { |
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250 // add monitor |
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251 defaultTypes.push_back(llvm::PointerType::get(llvm::Type::Int8Ty, 0)); |
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252 |
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253 // we start right after the vtbl and monitor |
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254 size_t offset = PTRSIZE * 2; |
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255 size_t field_index = 2; |
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256 |
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257 // add data members recursively |
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258 addBaseClassData(defaultTypes, cd, offset, field_index); |
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259 |
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260 #if 1 |
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261 // tail padding? |
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262 if (offset < cd->structsize) |
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263 { |
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264 field_index += add_zeros(defaultTypes, cd->structsize - offset); |
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265 offset = cd->structsize; |
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266 } |
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267 #endif |
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268 } |
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269 |
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270 // errors are fatal during codegen |
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271 if (global.errors) |
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272 fatal(); |
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273 |
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274 // build the llvm type |
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275 const llvm::Type* st = llvm::StructType::get(defaultTypes, false); |
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276 |
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277 // refine type |
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278 llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(st); |
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279 |
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280 // name type |
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281 Type::sir->getState()->module->addTypeName(cd->toPrettyChars(), pa.get()); |
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282 |
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283 // VTBL |
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284 |
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285 // build vtbl type |
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286 const llvm::Type* vtblty = buildVtblType( |
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287 ClassDeclaration::classinfo->type, |
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288 &cd->vtbl); |
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289 |
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290 // refine vtbl pa |
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291 llvm::cast<llvm::OpaqueType>(vtbl_pa.get())->refineAbstractTypeTo(vtblty); |
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292 |
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293 // name vtbl type |
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294 std::string name(cd->toPrettyChars()); |
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295 name.append(".__vtbl"); |
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296 Type::sir->getState()->module->addTypeName(name, vtbl_pa.get()); |
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297 |
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298 #if 0 |
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299 IF_LOG Logger::cout() << "class type: " << *pa.get() << std::endl; |
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300 #endif |
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301 |
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302 return get(); |
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303 } |
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304 |
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305 ////////////////////////////////////////////////////////////////////////////// |
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306 |
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307 const llvm::Type* IrTypeClass::buildVtblType(Type* first, Array* vtbl_array) |
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308 { |
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309 IF_LOG Logger::println("Building vtbl type for class %s", cd->toPrettyChars()); |
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310 LOG_SCOPE; |
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311 |
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312 std::vector<const llvm::Type*> types; |
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313 types.reserve(vtbl_array->dim); |
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314 |
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315 // first comes the classinfo |
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316 types.push_back(DtoType(first)); |
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317 |
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318 // then come the functions |
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319 ArrayIter<Dsymbol> it(*vtbl_array); |
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320 it.index = 1; |
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321 |
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322 for (; !it.done(); it.next()) |
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323 { |
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324 Dsymbol* dsym = it.get(); |
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325 if (dsym == NULL) |
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326 { |
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327 // FIXME |
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328 // why is this null? |
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329 // happens for mini/s.d |
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330 types.push_back(getVoidPtrType()); |
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331 continue; |
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332 } |
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333 |
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334 FuncDeclaration* fd = dsym->isFuncDeclaration(); |
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335 assert(fd && "invalid vtbl entry"); |
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336 |
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337 IF_LOG Logger::println("Adding type of %s", fd->toPrettyChars()); |
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338 |
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339 types.push_back(DtoType(fd->type->pointerTo())); |
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340 } |
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341 |
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342 // build the vtbl llvm type |
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343 return llvm::StructType::get(types, false); |
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344 } |
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345 |
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346 ////////////////////////////////////////////////////////////////////////////// |
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347 |
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348 const llvm::Type * IrTypeClass::get() |
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349 { |
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350 return llvm::PointerType::get(pa.get(), 0); |
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351 } |
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352 |
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353 ////////////////////////////////////////////////////////////////////////////// |
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354 |
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355 size_t IrTypeClass::getInterfaceIndex(ClassDeclaration * inter) |
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356 { |
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357 ClassIndexMap::iterator it = interfaceMap.find(inter); |
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358 if (it == interfaceMap.end()) |
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359 return ~0; |
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360 return it->second; |
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361 } |
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362 |
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363 ////////////////////////////////////////////////////////////////////////////// |
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364 |
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365 void IrTypeClass::addInterfaceToMap(ClassDeclaration * inter, size_t index) |
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366 { |
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367 // don't duplicate work or overwrite indices |
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368 if (interfaceMap.find(inter) != interfaceMap.end()) |
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369 return; |
465a77c904d4
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370 |
465a77c904d4
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371 // add this interface |
465a77c904d4
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372 interfaceMap.insert(std::make_pair(inter, index)); |
465a77c904d4
Fixed all issues preventing Tango 0.99.8 to compile with `sh build-tango.sh --verbose ldc'.
Tomas Lindquist Olsen <tomas.l.olsen gmail.com>
parents:
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373 |
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374 // add the direct base interfaces recursively - they |
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375 // are accessed through the same index |
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parents:
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376 if (inter->interfaces_dim > 0) |
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Tomas Lindquist Olsen <tomas.l.olsen gmail.com>
parents:
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377 { |
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Christian Kamm <kamm incasoftware de>
parents:
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378 BaseClass* b = inter->interfaces[0]; |
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379 addInterfaceToMap(b->base, index); |
465a77c904d4
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parents:
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380 } |
465a77c904d4
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381 } |
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382 |
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383 ////////////////////////////////////////////////////////////////////////////// |