Mercurial > projects > ldc
annotate gen/structs.cpp @ 858:ebbbf8c3ce93
Remove some dead code.
author | Christian Kamm <kamm incasoftware de> |
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date | Wed, 17 Dec 2008 21:03:06 +0100 |
parents | a125ada7fd95 |
children | af7a6faf9406 |
rev | line source |
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88
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[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.
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1 #include <algorithm> |
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2 |
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[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.
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3 #include "gen/llvm.h" |
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4 |
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5 #include "mtype.h" |
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6 #include "aggregate.h" |
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7 #include "init.h" |
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8 #include "declaration.h" |
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9 |
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10 #include "gen/irstate.h" |
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11 #include "gen/tollvm.h" |
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12 #include "gen/llvmhelpers.h" |
88
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13 #include "gen/arrays.h" |
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14 #include "gen/logger.h" |
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15 #include "gen/structs.h" |
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16 #include "gen/dvalue.h" |
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17 |
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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 |
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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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changeset
|
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.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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diff
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|
265 if (!nextdef->ir.irField->constInit) |
803
c62c6936635b
Removed DtoConstFieldInitializer, it's no longer needed and was buggy.
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diff
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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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diff
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|
286 |
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diff
changeset
|
287 assert(lastoffset+lastsize == structsize); |
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changeset
|
288 |
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|
289 // make the constant struct |
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changeset
|
290 LLConstant* c = LLConstantStruct::get(inits, si->ad->ir.irStruct->packed); |
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diff
changeset
|
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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parents:
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changeset
|
297 } |
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|
298 |
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changeset
|
299 ////////////////////////////////////////////////////////////////////////////////////////// |
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300 |
705
5a2983f97498
Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
301 LLValue* DtoIndexStruct(LLValue* src, StructDeclaration* sd, VarDeclaration* vd) |
88
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|
302 { |
705
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
303 Logger::println("indexing struct field %s:", vd->toPrettyChars()); |
88
058d3925950e
[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.
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changeset
|
304 LOG_SCOPE; |
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changeset
|
305 |
840
a125ada7fd95
more moreatatime fixes
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812
diff
changeset
|
306 DtoResolveStruct(sd); |
a125ada7fd95
more moreatatime fixes
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diff
changeset
|
307 |
705
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
308 // vd must be a field |
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
309 IrField* field = vd->ir.irField; |
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
310 assert(field); |
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Fixed weird struct problem from downs, see mini/compile_structs1.d
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|
311 |
797
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|
312 // get the start pointer |
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changeset
|
313 const LLType* st = getPtrToType(DtoType(sd->type)); |
88
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|
314 |
797
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diff
changeset
|
315 // cast to the formal struct type |
705
5a2983f97498
Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
316 src = DtoBitCast(src, st); |
5a2983f97498
Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
317 |
797
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diff
changeset
|
318 // gep to the index |
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diff
changeset
|
319 LLValue* val = DtoGEPi(src, 0, field->index); |
705
5a2983f97498
Fixed weird struct problem from downs, see mini/compile_structs1.d
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diff
changeset
|
320 |
797
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diff
changeset
|
321 // do we need to offset further? (union area) |
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diff
changeset
|
322 if (field->unionOffset) |
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diff
changeset
|
323 { |
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diff
changeset
|
324 // cast to void* |
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diff
changeset
|
325 val = DtoBitCast(val, getVoidPtrType()); |
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diff
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|
326 // offset |
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327 val = DtoGEPi1(val, field->unionOffset); |
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328 } |
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329 |
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330 // cast it to the right type |
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331 val = DtoBitCast(val, getPtrToType(DtoType(vd->type))); |
585
fbb1a366cfbc
Complex number should now follow the D ABI on x86. They're also treated as first class values now. Big change.
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332 |
622
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Wrapped all the most potentially expensive logging calls in a conditional to only do work when actually requested.
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333 if (Logger::enabled()) |
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334 Logger::cout() << "value: " << *val << '\n'; |
88
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335 |
705
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336 return val; |
88
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337 } |
100 | 338 |
102
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339 void DtoResolveStruct(StructDeclaration* sd) |
100 | 340 { |
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341 // don't do anything if already been here |
173
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342 if (sd->ir.resolved) return; |
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343 // make sure above works :P |
173
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344 sd->ir.resolved = true; |
100 | 345 |
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346 // log what we're doing |
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347 Logger::println("Resolving struct type: %s (%s)", sd->toChars(), sd->locToChars()); |
100 | 348 LOG_SCOPE; |
349 | |
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350 // get the DMD TypeStruct |
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351 TypeStruct* ts = (TypeStruct*)sd->type; |
171
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352 |
797
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353 // create the IrStruct |
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354 IrStruct* irstruct = new IrStruct(sd); |
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355 sd->ir.irStruct = irstruct; |
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356 |
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357 // create the type |
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358 ts->ir.type = new LLPATypeHolder(llvm::OpaqueType::get()); |
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359 |
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360 // handle forward declaration structs (opaques) |
737
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361 // didn't even know D had those ... |
656
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362 if (sd->sizeok != 1) |
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363 { |
797
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364 // nothing more to do |
656
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365 return; |
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366 } |
100 | 367 |
797
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368 // make this struct current |
100 | 369 gIR->structs.push_back(irstruct); |
370 | |
797
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371 // get some info |
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372 bool ispacked = (ts->alignsize() == 1); |
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373 bool isunion = sd->isUnionDeclaration(); |
737
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374 |
797
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375 // set irstruct info |
435
74101be2a553
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376 irstruct->packed = ispacked; |
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diff
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377 |
797
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378 // defined in this module? |
133
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379 bool thisModule = false; |
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380 if (sd->getModule() == gIR->dmodule) |
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381 thisModule = true; |
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382 |
725
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383 // methods, fields |
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384 Array* arr = sd->members; |
133
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385 for (int k=0; k < arr->dim; k++) { |
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386 Dsymbol* s = (Dsymbol*)arr->data[k]; |
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387 s->toObjFile(0); |
133
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388 } |
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389 |
797
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390 const LLType* ST = irstruct->build(); |
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391 |
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392 #if 0 |
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393 std::cout << sd->kind() << ' ' << sd->toPrettyChars() << " type: " << *ST << '\n'; |
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394 |
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395 // add fields |
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396 for (int k=0; k < fields->dim; k++) |
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397 { |
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398 VarDeclaration* v = (VarDeclaration*)fields->data[k]; |
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399 printf(" field: %s %s\n", v->type->toChars(), v->toChars()); |
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400 printf(" index: %u offset: %u\n", v->ir.irField->index, v->ir.irField->unionOffset); |
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401 } |
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|
402 |
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403 unsigned llvmSize = (unsigned)getABITypeSize(ST); |
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404 unsigned dmdSize = (unsigned)sd->type->size(); |
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405 printf(" llvm size: %u dmd size: %u\n", llvmSize, dmdSize); |
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406 assert(llvmSize == dmdSize); |
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|
407 |
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408 #endif |
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409 |
132 | 410 /*for (int k=0; k < sd->members->dim; k++) { |
100 | 411 Dsymbol* dsym = (Dsymbol*)(sd->members->data[k]); |
412 dsym->toObjFile(); | |
132 | 413 }*/ |
100 | 414 |
415 Logger::println("doing struct fields"); | |
416 | |
797
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417 // refine abstract types for stuff like: struct S{S* next;} |
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418 llvm::cast<llvm::OpaqueType>(ts->ir.type->get())->refineAbstractTypeTo(ST); |
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419 ST = ts->ir.type->get(); |
100 | 420 |
797
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421 // name type |
100 | 422 if (sd->parent->isModule()) { |
797
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423 gIR->module->addTypeName(sd->mangle(),ST); |
100 | 424 } |
425 | |
102
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426 gIR->structs.pop_back(); |
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427 |
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428 gIR->declareList.push_back(sd); |
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429 } |
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|
430 |
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431 ////////////////////////////////////////////////////////////////////////////////////////// |
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432 |
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433 void DtoDeclareStruct(StructDeclaration* sd) |
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434 { |
173
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435 if (sd->ir.declared) return; |
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|
436 sd->ir.declared = true; |
102
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437 |
132 | 438 Logger::println("DtoDeclareStruct(%s): %s", sd->toChars(), sd->loc.toChars()); |
102
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439 LOG_SCOPE; |
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440 |
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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|
441 TypeStruct* ts = (TypeStruct*)sd->type->toBasetype(); |
102
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442 |
100 | 443 std::string initname("_D"); |
444 initname.append(sd->mangle()); | |
445 initname.append("6__initZ"); | |
446 | |
149
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[svn r155] Fixed a bunch of linkage problems (especially with templates)
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|
447 llvm::GlobalValue::LinkageTypes _linkage = DtoExternalLinkage(sd); |
797
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448 llvm::GlobalVariable* initvar = new llvm::GlobalVariable(sd->ir.irStruct->initOpaque.get(), true, _linkage, NULL, initname, gIR->module); |
173
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449 sd->ir.irStruct->init = initvar; |
100 | 450 |
102
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451 gIR->constInitList.push_back(sd); |
171
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452 if (DtoIsTemplateInstance(sd) || sd->getModule() == gIR->dmodule) |
102
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453 gIR->defineList.push_back(sd); |
100 | 454 } |
455 | |
456 ////////////////////////////////////////////////////////////////////////////////////////// | |
457 | |
458 void DtoConstInitStruct(StructDeclaration* sd) | |
459 { | |
173
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460 if (sd->ir.initialized) return; |
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461 sd->ir.initialized = true; |
100 | 462 |
132 | 463 Logger::println("DtoConstInitStruct(%s): %s", sd->toChars(), sd->loc.toChars()); |
100 | 464 LOG_SCOPE; |
465 | |
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466 IrStruct* irstruct = sd->ir.irStruct; |
100 | 467 gIR->structs.push_back(irstruct); |
468 | |
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469 const llvm::StructType* structtype = isaStruct(sd->type->ir.type->get()); |
100 | 470 |
471 // always generate the constant initalizer | |
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472 assert(!irstruct->constInit); |
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473 if (sd->zeroInit) |
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474 { |
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475 Logger::println("Zero initialized"); |
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476 irstruct->constInit = llvm::ConstantAggregateZero::get(structtype); |
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477 } |
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478 else |
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479 { |
100 | 480 Logger::println("Not zero initialized"); |
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481 |
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482 LLConstant* c = irstruct->buildDefaultConstInit(); |
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483 irstruct->constInit = c; |
100 | 484 } |
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485 |
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486 // refine __initZ global type to the one of the initializer |
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487 llvm::cast<llvm::OpaqueType>(irstruct->initOpaque.get())->refineAbstractTypeTo(irstruct->constInit->getType()); |
100 | 488 |
489 gIR->structs.pop_back(); | |
102
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490 |
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491 // emit typeinfo |
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492 if (sd->getModule() == gIR->dmodule && sd->llvmInternal != LLVMno_typeinfo) |
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493 DtoTypeInfoOf(sd->type, false); |
100 | 494 } |
495 | |
496 ////////////////////////////////////////////////////////////////////////////////////////// | |
497 | |
498 void DtoDefineStruct(StructDeclaration* sd) | |
499 { | |
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500 if (sd->ir.defined) return; |
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501 sd->ir.defined = true; |
100 | 502 |
132 | 503 Logger::println("DtoDefineStruct(%s): %s", sd->toChars(), sd->loc.toChars()); |
100 | 504 LOG_SCOPE; |
505 | |
506 assert(sd->type->ty == Tstruct); | |
507 TypeStruct* ts = (TypeStruct*)sd->type; | |
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508 sd->ir.irStruct->init->setInitializer(sd->ir.irStruct->constInit); |
100 | 509 |
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510 sd->ir.DModule = gIR->dmodule; |
100 | 511 } |
512 | |
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513 ////////////////////////////////////////////////////////////////////////////////////////// |
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514 //////////////////////////// D STRUCT UTILITIES //////////////////////////////////// |
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515 ////////////////////////////////////////////////////////////////////////////////////////// |
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516 |
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517 LLValue* DtoStructEquals(TOK op, DValue* lhs, DValue* rhs) |
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518 { |
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519 Type* t = lhs->getType()->toBasetype(); |
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520 assert(t->ty == Tstruct); |
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521 |
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522 // set predicate |
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523 llvm::ICmpInst::Predicate cmpop; |
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524 if (op == TOKequal || op == TOKidentity) |
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525 cmpop = llvm::ICmpInst::ICMP_EQ; |
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526 else |
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527 cmpop = llvm::ICmpInst::ICMP_NE; |
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528 |
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529 // call memcmp |
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530 size_t sz = getABITypeSize(DtoType(t)); |
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531 LLValue* val = DtoMemCmp(lhs->getRVal(), rhs->getRVal(), DtoConstSize_t(sz)); |
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532 return gIR->ir->CreateICmp(cmpop, val, LLConstantInt::get(val->getType(), 0, false), "tmp"); |
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533 } |