Mercurial > projects > ldc
annotate gen/structs.cpp @ 837:331a176c1f4f
Removed error on naked, not fully complete, but I'll be doing more work on it during this Christmas, and some things do work.
Fixed taking delegate of final class method. see mini/delegate3.d.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Tue, 09 Dec 2008 14:07:30 +0100 |
parents | 6c2ff06c4201 |
children | a125ada7fd95 |
rev | line source |
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88
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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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[svn r261] Fixed debug info for integer and floating local variables, can now be inspected in GDB.
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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 |
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[svn r140] did a lot of the work towards being able to pass multiple modules on the command line. not complete yet though
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18 #include "ir/irstruct.h" |
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19 |
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20 ////////////////////////////////////////////////////////////////////////////////////////// |
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21 |
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22 // pair of var and its init |
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23 typedef std::pair<VarDeclaration*,Initializer*> VarInitPair; |
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24 |
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25 // comparison func for qsort |
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26 static int varinit_offset_cmp_func(const void* p1, const void* p2) |
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27 { |
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28 VarDeclaration* v1 = ((VarInitPair*)p1)->first; |
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29 VarDeclaration* v2 = ((VarInitPair*)p2)->first; |
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30 if (v1->offset < v2->offset) |
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31 return -1; |
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32 else if (v1->offset > v2->offset) |
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33 return 1; |
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34 else |
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35 return 0; |
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36 } |
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37 |
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38 /* |
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39 this uses a simple algorithm to build the correct constant |
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40 |
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41 (1) first sort the explicit initializers by offset... well, DMD doesn't :) |
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42 |
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43 (2) if there is NO space before the next explicit initializeer, goto (9) |
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44 (3) find the next default initializer that fits before it, if NOT found goto (7) |
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45 (4) insert zero padding up to the next default initializer |
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46 (5) insert the next default initializer |
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47 (6) goto (2) |
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48 |
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49 (7) insert zero padding up to the next explicit initializer |
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50 |
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51 (9) insert the next explicit initializer |
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52 (10) goto (2) |
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53 |
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54 (11) done |
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55 |
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56 (next can be the end too) |
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57 |
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58 */ |
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59 |
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60 // return the next default initializer to use or null |
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61 static VarDeclaration* nextDefault(IrStruct* irstruct, size_t& idx, size_t pos, size_t offset) |
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62 { |
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63 IrStruct::VarDeclVector& defaults = irstruct->defVars; |
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64 size_t ndefaults = defaults.size(); |
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65 |
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66 // for each valid index |
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67 while(idx < ndefaults) |
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68 { |
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69 VarDeclaration* v = defaults[idx]; |
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70 |
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71 // skip defaults before pos |
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72 if (v->offset < pos) |
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73 { |
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74 idx++; |
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75 continue; |
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76 } |
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77 |
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78 // this var default fits |
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79 if (v->offset >= pos && v->offset + v->type->size() <= offset) |
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80 return v; |
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81 |
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82 // not usable |
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83 break; |
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84 } |
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85 |
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86 // not usable |
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87 return NULL; |
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88 } |
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89 |
213
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90 LLConstant* DtoConstStructInitializer(StructInitializer* si) |
88
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91 { |
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92 Logger::println("DtoConstStructInitializer: %s", si->toChars()); |
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93 LOG_SCOPE; |
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94 |
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95 // get TypeStruct |
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96 assert(si->ad); |
100 | 97 TypeStruct* ts = (TypeStruct*)si->ad->type; |
98 | |
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99 // force constant initialization of the symbol |
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100 DtoForceConstInitDsymbol(si->ad); |
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101 |
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102 // get formal type |
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103 const llvm::StructType* structtype = isaStruct(ts->ir.type->get()); |
622
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104 |
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105 // log it |
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106 if (Logger::enabled()) |
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107 Logger::cout() << "llvm struct type: " << *structtype << '\n'; |
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108 |
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109 // sanity check |
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110 assert(si->value.dim > 0); |
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111 assert(si->value.dim == si->vars.dim); |
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112 |
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113 // vector of final initializer constants |
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114 std::vector<LLConstant*> inits; |
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115 |
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116 // get the ir struct |
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117 IrStruct* irstruct = si->ad->ir.irStruct; |
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118 |
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119 // get default fields |
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120 IrStruct::VarDeclVector& defaults = irstruct->defVars; |
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121 size_t ndefaults = defaults.size(); |
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122 |
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123 // make sure si->vars is sorted by offset |
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124 std::vector<VarInitPair> vars; |
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125 size_t nvars = si->vars.dim; |
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126 vars.resize(nvars); |
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127 |
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128 // fill pair vector |
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129 for (size_t i = 0; i < nvars; i++) |
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130 { |
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131 VarDeclaration* var = (VarDeclaration*)si->vars.data[i]; |
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132 Initializer* ini = (Initializer*)si->value.data[i]; |
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133 assert(var); |
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134 assert(ini); |
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135 vars[i] = std::make_pair(var, ini); |
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136 } |
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137 // sort it |
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138 qsort(&vars[0], nvars, sizeof(VarInitPair), &varinit_offset_cmp_func); |
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139 |
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140 // check integrity |
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141 // and do error checking, since the frontend does not verify static struct initializers |
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142 size_t lastoffset = 0; |
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143 size_t lastsize = 0; |
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144 bool overlap = false; |
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145 for (size_t i=0; i < nvars; i++) |
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146 { |
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147 // next explicit init var |
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148 VarDeclaration* var = vars[i].first; |
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149 Logger::println("var = %s : +%u", var->toChars(), var->offset); |
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150 |
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151 // I would have thought this to be a frontend check |
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152 for (size_t j=i+1; j<nvars; j++) |
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153 { |
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154 if (j == i) |
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155 continue; |
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156 VarDeclaration* var2 = vars[j].first; |
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157 if (var2->offset >= var->offset && var2->offset < var->offset + var->type->size()) |
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158 { |
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159 fprintf(stdmsg, "Error: %s: initializer '%s' overlaps with '%s'\n", si->loc.toChars(), var->toChars(), var2->toChars()); |
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160 overlap = true; |
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161 } |
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162 } |
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163 |
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164 // update offsets |
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165 lastoffset = var->offset; |
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166 lastsize = var->type->size(); |
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167 } |
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168 |
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169 // error handling, report all overlaps before aborting |
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170 if (overlap) |
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171 { |
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172 error("%s: overlapping union initializers", si->loc.toChars()); |
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173 } |
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174 |
797
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175 // go through each explicit initalizer, falling back to defaults or zeros when necessary |
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176 lastoffset = 0; |
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177 lastsize = 0; |
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178 |
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179 size_t j=0; // defaults |
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180 |
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181 for (size_t i=0; i < nvars; i++) |
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182 { |
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183 // get var and init |
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184 VarDeclaration* var = vars[i].first; |
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185 Initializer* ini = vars[i].second; |
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186 |
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187 size_t offset = var->offset; |
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188 size_t size = var->type->size(); |
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189 |
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190 // if there is space before the next explicit initializer |
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191 Lpadding: |
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192 size_t pos = lastoffset+lastsize; |
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193 if (offset > pos) |
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194 { |
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195 // find the the next default initializer that fits in this space |
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196 VarDeclaration* nextdef = nextDefault(irstruct, j, lastoffset+lastsize, offset); |
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197 |
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198 // found |
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199 if (nextdef) |
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200 { |
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201 // need zeros before the default |
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202 if (nextdef->offset > pos) |
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203 { |
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204 Logger::println("inserting %lu byte padding at %lu", nextdef->offset - pos, pos); |
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205 addZeros(inits, pos, nextdef->offset); |
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206 } |
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207 |
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208 // do the default |
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209 Logger::println("adding default field: %s : +%u", nextdef->toChars(), nextdef->offset); |
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210 if (!nextdef->ir.irField->constInit) |
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211 nextdef->ir.irField->constInit = DtoConstInitializer(nextdef->loc, nextdef->type, nextdef->init); |
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212 LLConstant* c = nextdef->ir.irField->constInit; |
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213 inits.push_back(c); |
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214 |
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215 // update offsets |
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216 lastoffset = nextdef->offset; |
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217 lastsize = nextdef->type->size(); |
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218 |
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219 // check if more defaults would fit |
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220 goto Lpadding; |
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221 } |
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222 // not found, pad with zeros |
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223 else |
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224 { |
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225 Logger::println("inserting %lu byte padding at %lu", offset - pos, pos); |
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226 addZeros(inits, pos, offset); |
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227 // offsets are updated by the explicit initializer |
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228 } |
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229 } |
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230 |
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231 // insert next explicit |
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232 Logger::println("adding explicit field: %s : +%lu", var->toChars(), offset); |
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233 LOG_SCOPE; |
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234 LLConstant* c = DtoConstInitializer(var->loc, var->type, ini); |
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235 inits.push_back(c); |
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236 |
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237 lastoffset = offset; |
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238 lastsize = size; |
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239 } |
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240 |
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241 // there might still be padding after the last one, make sure that is defaulted/zeroed as well |
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242 size_t structsize = getABITypeSize(structtype); |
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243 |
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244 // if there is space before the next explicit initializer |
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245 // FIXME: this should be handled in the loop above as well |
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246 Lpadding2: |
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247 size_t pos = lastoffset+lastsize; |
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248 if (structsize > pos) |
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249 { |
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250 // find the the next default initializer that fits in this space |
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251 VarDeclaration* nextdef = nextDefault(irstruct, j, lastoffset+lastsize, structsize); |
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252 |
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253 // found |
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254 if (nextdef) |
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255 { |
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256 // need zeros before the default |
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257 if (nextdef->offset > pos) |
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258 { |
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259 Logger::println("inserting %lu byte padding at %lu", nextdef->offset - pos, pos); |
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260 addZeros(inits, pos, nextdef->offset); |
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261 } |
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262 |
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263 // do the default |
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|
264 Logger::println("adding default field: %s : +%u", nextdef->toChars(), nextdef->offset); |
800
d14e4594c7d7
Changed aggregate field initializers to be created lazily, fixes problem with static void arrays in aggregates.
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265 if (!nextdef->ir.irField->constInit) |
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266 nextdef->ir.irField->constInit = DtoConstInitializer(nextdef->loc, nextdef->type, nextdef->init); |
797
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267 LLConstant* c = nextdef->ir.irField->constInit; |
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268 inits.push_back(c); |
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269 |
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270 // update offsets |
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271 lastoffset = nextdef->offset; |
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272 lastsize = nextdef->type->size(); |
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273 |
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274 // check if more defaults would fit |
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275 goto Lpadding2; |
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276 } |
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277 // not found, pad with zeros |
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278 else |
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279 { |
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280 Logger::println("inserting %lu byte padding at %lu", structsize - pos, pos); |
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|
281 addZeros(inits, pos, structsize); |
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282 lastoffset = pos; |
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283 lastsize = structsize - pos; |
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284 } |
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|
285 } |
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286 |
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|
287 assert(lastoffset+lastsize == structsize); |
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288 |
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289 // make the constant struct |
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290 LLConstant* c = LLConstantStruct::get(inits, si->ad->ir.irStruct->packed); |
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|
291 if (Logger::enabled()) |
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292 { |
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293 Logger::cout() << "constant struct initializer: " << *c << '\n'; |
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294 } |
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295 assert(getABITypeSize(c->getType()) == structsize); |
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296 return c; |
88
058d3925950e
[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.
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|
297 } |
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|
298 |
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|
299 ////////////////////////////////////////////////////////////////////////////////////////// |
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300 |
705
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|
301 LLValue* DtoIndexStruct(LLValue* src, StructDeclaration* sd, VarDeclaration* vd) |
88
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|
302 { |
705
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|
303 Logger::println("indexing struct field %s:", vd->toPrettyChars()); |
88
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|
304 LOG_SCOPE; |
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|
305 |
705
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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|
306 // vd must be a field |
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|
307 IrField* field = vd->ir.irField; |
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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changeset
|
308 assert(field); |
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|
309 |
797
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|
310 // get the start pointer |
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|
311 const LLType* st = getPtrToType(DtoType(sd->type)); |
88
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312 |
797
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|
313 // cast to the formal struct type |
705
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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changeset
|
314 src = DtoBitCast(src, st); |
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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|
315 |
797
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|
316 // gep to the index |
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|
317 LLValue* val = DtoGEPi(src, 0, field->index); |
705
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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|
318 |
797
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changeset
|
319 // do we need to offset further? (union area) |
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changeset
|
320 if (field->unionOffset) |
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|
321 { |
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changeset
|
322 // cast to void* |
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|
323 val = DtoBitCast(val, getVoidPtrType()); |
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|
324 // offset |
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changeset
|
325 val = DtoGEPi1(val, field->unionOffset); |
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326 } |
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327 |
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328 // cast it to the right type |
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329 val = DtoBitCast(val, getPtrToType(DtoType(vd->type))); |
585
fbb1a366cfbc
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330 |
622
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331 if (Logger::enabled()) |
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332 Logger::cout() << "value: " << *val << '\n'; |
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333 |
705
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334 return val; |
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335 } |
100 | 336 |
102
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337 void DtoResolveStruct(StructDeclaration* sd) |
100 | 338 { |
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339 // don't do anything if already been here |
173
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340 if (sd->ir.resolved) return; |
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341 // make sure above works :P |
173
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342 sd->ir.resolved = true; |
100 | 343 |
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344 // log what we're doing |
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345 Logger::println("Resolving struct type: %s (%s)", sd->toChars(), sd->locToChars()); |
100 | 346 LOG_SCOPE; |
347 | |
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348 // get the DMD TypeStruct |
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349 TypeStruct* ts = (TypeStruct*)sd->type; |
171
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350 |
797
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351 // create the IrStruct |
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352 IrStruct* irstruct = new IrStruct(sd); |
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353 sd->ir.irStruct = irstruct; |
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354 |
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355 // create the type |
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356 ts->ir.type = new LLPATypeHolder(llvm::OpaqueType::get()); |
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357 |
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358 // handle forward declaration structs (opaques) |
737
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359 // didn't even know D had those ... |
656
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360 if (sd->sizeok != 1) |
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361 { |
797
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362 // nothing more to do |
656
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363 return; |
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364 } |
100 | 365 |
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366 // make this struct current |
100 | 367 gIR->structs.push_back(irstruct); |
368 | |
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369 // get some info |
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370 bool ispacked = (ts->alignsize() == 1); |
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371 bool isunion = sd->isUnionDeclaration(); |
737
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372 |
797
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373 // set irstruct info |
435
74101be2a553
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374 irstruct->packed = ispacked; |
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375 |
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376 // defined in this module? |
133
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377 bool thisModule = false; |
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378 if (sd->getModule() == gIR->dmodule) |
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379 thisModule = true; |
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380 |
725
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381 // methods, fields |
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382 Array* arr = sd->members; |
133
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383 for (int k=0; k < arr->dim; k++) { |
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384 Dsymbol* s = (Dsymbol*)arr->data[k]; |
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385 s->toObjFile(0); |
133
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386 } |
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387 |
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388 const LLType* ST = irstruct->build(); |
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389 |
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390 #if 0 |
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391 std::cout << sd->kind() << ' ' << sd->toPrettyChars() << " type: " << *ST << '\n'; |
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392 |
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393 // add fields |
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394 for (int k=0; k < fields->dim; k++) |
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395 { |
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396 VarDeclaration* v = (VarDeclaration*)fields->data[k]; |
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397 printf(" field: %s %s\n", v->type->toChars(), v->toChars()); |
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398 printf(" index: %u offset: %u\n", v->ir.irField->index, v->ir.irField->unionOffset); |
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399 } |
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400 |
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401 unsigned llvmSize = (unsigned)getABITypeSize(ST); |
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402 unsigned dmdSize = (unsigned)sd->type->size(); |
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403 printf(" llvm size: %u dmd size: %u\n", llvmSize, dmdSize); |
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404 assert(llvmSize == dmdSize); |
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405 |
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406 #endif |
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407 |
132 | 408 /*for (int k=0; k < sd->members->dim; k++) { |
100 | 409 Dsymbol* dsym = (Dsymbol*)(sd->members->data[k]); |
410 dsym->toObjFile(); | |
132 | 411 }*/ |
100 | 412 |
413 Logger::println("doing struct fields"); | |
414 | |
797
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415 // refine abstract types for stuff like: struct S{S* next;} |
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416 llvm::cast<llvm::OpaqueType>(ts->ir.type->get())->refineAbstractTypeTo(ST); |
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417 ST = ts->ir.type->get(); |
100 | 418 |
797
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419 // name type |
100 | 420 if (sd->parent->isModule()) { |
797
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421 gIR->module->addTypeName(sd->mangle(),ST); |
100 | 422 } |
423 | |
102
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424 gIR->structs.pop_back(); |
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425 |
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426 gIR->declareList.push_back(sd); |
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427 } |
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|
428 |
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429 ////////////////////////////////////////////////////////////////////////////////////////// |
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430 |
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431 void DtoDeclareStruct(StructDeclaration* sd) |
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432 { |
173
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433 if (sd->ir.declared) return; |
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434 sd->ir.declared = true; |
102
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435 |
132 | 436 Logger::println("DtoDeclareStruct(%s): %s", sd->toChars(), sd->loc.toChars()); |
102
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437 LOG_SCOPE; |
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438 |
486
a34078905d01
Added pragma(llvmdc, "string") for misc per-module compiler configuration, currently "string" can only be "verbose" which forces -vv for module it appears in.
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439 TypeStruct* ts = (TypeStruct*)sd->type->toBasetype(); |
102
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440 |
100 | 441 std::string initname("_D"); |
442 initname.append(sd->mangle()); | |
443 initname.append("6__initZ"); | |
444 | |
149
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|
445 llvm::GlobalValue::LinkageTypes _linkage = DtoExternalLinkage(sd); |
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446 llvm::GlobalVariable* initvar = new llvm::GlobalVariable(sd->ir.irStruct->initOpaque.get(), true, _linkage, NULL, initname, gIR->module); |
173
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447 sd->ir.irStruct->init = initvar; |
100 | 448 |
102
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449 gIR->constInitList.push_back(sd); |
171
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450 if (DtoIsTemplateInstance(sd) || sd->getModule() == gIR->dmodule) |
102
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451 gIR->defineList.push_back(sd); |
100 | 452 } |
453 | |
454 ////////////////////////////////////////////////////////////////////////////////////////// | |
455 | |
456 void DtoConstInitStruct(StructDeclaration* sd) | |
457 { | |
173
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458 if (sd->ir.initialized) return; |
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459 sd->ir.initialized = true; |
100 | 460 |
132 | 461 Logger::println("DtoConstInitStruct(%s): %s", sd->toChars(), sd->loc.toChars()); |
100 | 462 LOG_SCOPE; |
463 | |
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464 IrStruct* irstruct = sd->ir.irStruct; |
100 | 465 gIR->structs.push_back(irstruct); |
466 | |
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467 const llvm::StructType* structtype = isaStruct(sd->type->ir.type->get()); |
100 | 468 |
469 // always generate the constant initalizer | |
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470 assert(!irstruct->constInit); |
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471 if (sd->zeroInit) |
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472 { |
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473 Logger::println("Zero initialized"); |
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474 irstruct->constInit = llvm::ConstantAggregateZero::get(structtype); |
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475 } |
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476 else |
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477 { |
100 | 478 Logger::println("Not zero initialized"); |
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479 |
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480 LLConstant* c = irstruct->buildDefaultConstInit(); |
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481 irstruct->constInit = c; |
100 | 482 } |
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483 |
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484 // refine __initZ global type to the one of the initializer |
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485 llvm::cast<llvm::OpaqueType>(irstruct->initOpaque.get())->refineAbstractTypeTo(irstruct->constInit->getType()); |
100 | 486 |
487 gIR->structs.pop_back(); | |
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488 |
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489 // emit typeinfo |
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490 if (sd->getModule() == gIR->dmodule && sd->llvmInternal != LLVMno_typeinfo) |
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491 DtoTypeInfoOf(sd->type, false); |
100 | 492 } |
493 | |
494 ////////////////////////////////////////////////////////////////////////////////////////// | |
495 | |
496 void DtoDefineStruct(StructDeclaration* sd) | |
497 { | |
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498 if (sd->ir.defined) return; |
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499 sd->ir.defined = true; |
100 | 500 |
132 | 501 Logger::println("DtoDefineStruct(%s): %s", sd->toChars(), sd->loc.toChars()); |
100 | 502 LOG_SCOPE; |
503 | |
504 assert(sd->type->ty == Tstruct); | |
505 TypeStruct* ts = (TypeStruct*)sd->type; | |
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506 sd->ir.irStruct->init->setInitializer(sd->ir.irStruct->constInit); |
100 | 507 |
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508 sd->ir.DModule = gIR->dmodule; |
100 | 509 } |
510 | |
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511 ////////////////////////////////////////////////////////////////////////////////////////// |
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512 //////////////////////////// D STRUCT UTILITIES //////////////////////////////////// |
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513 ////////////////////////////////////////////////////////////////////////////////////////// |
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514 |
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515 LLValue* DtoStructEquals(TOK op, DValue* lhs, DValue* rhs) |
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516 { |
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517 Type* t = lhs->getType()->toBasetype(); |
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518 assert(t->ty == Tstruct); |
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519 |
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520 // set predicate |
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521 llvm::ICmpInst::Predicate cmpop; |
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522 if (op == TOKequal || op == TOKidentity) |
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523 cmpop = llvm::ICmpInst::ICMP_EQ; |
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524 else |
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525 cmpop = llvm::ICmpInst::ICMP_NE; |
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526 |
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527 // call memcmp |
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528 size_t sz = getABITypeSize(DtoType(t)); |
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529 LLValue* val = DtoMemCmp(lhs->getRVal(), rhs->getRVal(), DtoConstSize_t(sz)); |
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530 return gIR->ir->CreateICmp(cmpop, val, LLConstantInt::get(val->getType(), 0, false), "tmp"); |
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531 } |