Mercurial > projects > ldc
annotate ir/irtypestruct.cpp @ 1231:212ec2d9d176
Fixed some minitest regressions.
author | Tomas Lindquist Olsen <tomas.l.olsen gmail.com> |
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date | Thu, 16 Apr 2009 19:21:30 +0200 |
parents | 79758fd2f48a |
children | 9201e0d41ee5 |
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 "mtype.h" |
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6 |
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7 #include "gen/irstate.h" |
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8 #include "gen/tollvm.h" |
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9 #include "gen/logger.h" |
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10 #include "gen/utils.h" |
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11 #include "ir/irtypestruct.h" |
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12 |
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13 ////////////////////////////////////////////////////////////////////////////// |
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14 ////////////////////////////////////////////////////////////////////////////// |
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15 ////////////////////////////////////////////////////////////////////////////// |
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16 |
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17 IrTypeAggr::IrTypeAggr(AggregateDeclaration * ad) |
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18 : IrType(ad->type, llvm::OpaqueType::get()), |
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19 aggr(ad) |
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20 { |
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21 } |
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22 |
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23 ////////////////////////////////////////////////////////////////////////////// |
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24 ////////////////////////////////////////////////////////////////////////////// |
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25 ////////////////////////////////////////////////////////////////////////////// |
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26 |
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27 IrTypeStruct::IrTypeStruct(StructDeclaration * sd) |
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28 : IrTypeAggr(sd), |
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29 sd(sd), |
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30 ts((TypeStruct*)sd->type) |
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31 { |
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32 } |
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33 |
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34 ////////////////////////////////////////////////////////////////////////////// |
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35 |
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36 size_t add_zeros(std::vector<const llvm::Type*>& defaultTypes, size_t diff) |
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37 { |
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38 size_t n = defaultTypes.size(); |
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39 while (diff) |
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40 { |
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41 if (global.params.is64bit && diff % 8 == 0) |
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42 { |
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43 defaultTypes.push_back(llvm::Type::Int64Ty); |
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44 diff -= 8; |
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45 } |
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46 else if (diff % 4 == 0) |
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47 { |
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48 defaultTypes.push_back(llvm::Type::Int32Ty); |
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49 diff -= 4; |
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50 } |
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51 else if (diff % 2 == 0) |
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52 { |
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53 defaultTypes.push_back(llvm::Type::Int16Ty); |
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54 diff -= 2; |
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55 } |
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56 else |
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57 { |
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58 defaultTypes.push_back(llvm::Type::Int8Ty); |
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59 diff -= 1; |
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60 } |
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61 } |
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62 return defaultTypes.size() - n; |
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63 } |
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64 |
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65 const llvm::Type* IrTypeStruct::buildType() |
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66 { |
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67 IF_LOG Logger::println("Building struct type %s @ %s", sd->toPrettyChars(), sd->locToChars()); |
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68 LOG_SCOPE; |
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69 |
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70 // find the fields that contribute to the default initializer. |
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71 // these will define the default type. |
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72 |
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73 std::vector<const llvm::Type*> defaultTypes; |
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74 defaultTypes.reserve(16); |
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75 |
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76 size_t offset = 0; |
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77 size_t field_index = 0; |
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78 |
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79 bool packed = (sd->type->alignsize() == 1); |
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80 |
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81 ArrayIter<VarDeclaration> it(sd->fields); |
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82 for (; !it.done(); it.next()) |
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83 { |
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84 VarDeclaration* vd = it.get(); |
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85 |
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86 assert(vd->ir.irField == NULL && "struct inheritance is not allowed, how can this happen?"); |
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87 |
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88 // skip if offset moved backwards |
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89 if (vd->offset < offset) |
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90 { |
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91 IF_LOG Logger::println("Skipping field %s %s (+%u) for default", vd->type->toChars(), vd->toChars(), vd->offset); |
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92 new IrField(vd, 0, vd->offset); |
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93 continue; |
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94 } |
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95 |
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96 IF_LOG Logger::println("Adding default field %s %s (+%u)", vd->type->toChars(), vd->toChars(), vd->offset); |
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97 |
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98 // get next aligned offset for this type |
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99 size_t alignedoffset = offset; |
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100 if (!packed) |
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101 { |
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102 size_t alignsize = vd->type->alignsize(); |
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103 alignedoffset = (offset + alignsize - 1) & ~(alignsize - 1); |
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104 } |
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105 |
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106 // insert explicit padding? |
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107 if (alignedoffset < vd->offset) |
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108 { |
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109 field_index += add_zeros(defaultTypes, vd->offset - alignedoffset); |
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110 } |
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111 |
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112 // add default type |
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113 defaultTypes.push_back(DtoType(vd->type)); |
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114 |
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115 // advance offset to right past this field |
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116 offset = vd->offset + vd->type->size(); |
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117 |
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118 // give field index |
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119 // the IrField creation doesn't really belong here, but it's a trivial operation |
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120 // and it save yet another of these loops. |
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121 IF_LOG Logger::println("Field index: %zu", field_index); |
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122 new IrField(vd, field_index); |
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123 field_index++; |
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124 } |
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125 |
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126 // tail padding? |
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127 if (offset < sd->structsize) |
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128 { |
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129 add_zeros(defaultTypes, sd->structsize - offset); |
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130 } |
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131 |
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132 // build the llvm type |
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133 const llvm::Type* st = llvm::StructType::get(defaultTypes, packed); |
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134 |
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135 // refine type |
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136 llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(st); |
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137 |
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138 // name types |
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139 Type::sir->getState()->module->addTypeName(sd->toPrettyChars(), pa.get()); |
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140 |
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141 #if 1 |
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142 IF_LOG Logger::cout() << "final struct type: " << *pa.get() << std::endl; |
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143 #endif |
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144 |
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145 return pa.get(); |
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146 } |
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147 |
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148 ////////////////////////////////////////////////////////////////////////////// |