Mercurial > projects > ldc
annotate gen/tocall.cpp @ 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.
Reimplemented support for nested functions/class using a new approach.
Added error on taking address of intrinsic.
Fixed problems with the ->syntaxCopy of TypeFunction delegate exp.
Removed DtoDType and replaced all uses with ->toBasetype() instead.
Removed unused inplace stuff.
Fixed a bunch of issues in the runtime unittests, not complete yet.
Added mini tests.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Sun, 10 Aug 2008 08:37:38 +0200 |
parents | 672eb4893b55 |
children | 993b217af574 |
rev | line source |
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1 #include "gen/llvm.h" |
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2 |
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3 #include "mtype.h" |
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4 #include "declaration.h" |
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5 |
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6 #include "gen/tollvm.h" |
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7 #include "gen/llvmhelpers.h" |
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8 #include "gen/irstate.h" |
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9 #include "gen/dvalue.h" |
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10 #include "gen/functions.h" |
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11 |
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12 #include "gen/logger.h" |
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13 |
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14 ////////////////////////////////////////////////////////////////////////////////////////// |
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15 |
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16 TypeFunction* DtoTypeFunction(DValue* fnval) |
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17 { |
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18 Type* type = fnval->getType()->toBasetype(); |
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19 if (type->ty == Tfunction) |
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20 { |
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21 return (TypeFunction*)type; |
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22 } |
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23 else if (type->ty == Tdelegate) |
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24 { |
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25 assert(type->next->ty == Tfunction); |
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26 return (TypeFunction*)type->next; |
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27 } |
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28 |
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29 assert(0 && "cant get TypeFunction* from non lazy/function/delegate"); |
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30 return 0; |
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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 unsigned DtoCallingConv(LINK l) |
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36 { |
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37 if (l == LINKc || l == LINKcpp) |
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38 return llvm::CallingConv::C; |
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39 else if (l == LINKd || l == LINKdefault) |
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40 return llvm::CallingConv::Fast; |
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41 else if (l == LINKwindows) |
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42 return llvm::CallingConv::X86_StdCall; |
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43 else |
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44 assert(0 && "Unsupported calling convention"); |
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45 } |
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46 |
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47 ////////////////////////////////////////////////////////////////////////////////////////// |
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48 |
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49 DValue* DtoVaArg(Loc& loc, Type* type, Expression* valistArg) |
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50 { |
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51 DValue* expelem = valistArg->toElem(gIR); |
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52 const LLType* llt = DtoType(type); |
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53 if (DtoIsPassedByRef(type)) |
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54 llt = getPtrToType(llt); |
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55 // issue a warning for broken va_arg instruction. |
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56 if (global.params.cpu != ARCHx86) |
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57 warning("%s: va_arg for C variadic functions is probably broken for anything but x86", loc.toChars()); |
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58 // done |
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59 return new DImValue(type, gIR->ir->CreateVAArg(expelem->getLVal(), llt, "tmp")); |
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60 } |
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61 |
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62 ////////////////////////////////////////////////////////////////////////////////////////// |
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63 |
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64 LLValue* DtoCallableValue(DValue* fn) |
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65 { |
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66 Type* type = fn->getType()->toBasetype(); |
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67 if (type->ty == Tfunction) |
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68 { |
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69 return fn->getRVal(); |
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70 } |
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71 else if (type->ty == Tdelegate) |
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72 { |
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73 LLValue* dg = fn->getRVal(); |
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74 Logger::cout() << "delegate: " << *dg << '\n'; |
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75 LLValue* funcptr = DtoGEPi(dg, 0, 1); |
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76 return DtoLoad(funcptr); |
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77 } |
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78 else |
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79 { |
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80 assert(0 && "not a callable type"); |
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81 return NULL; |
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82 } |
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83 } |
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84 |
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85 ////////////////////////////////////////////////////////////////////////////////////////// |
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86 |
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87 const LLFunctionType* DtoExtractFunctionType(const LLType* type) |
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88 { |
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89 if (const LLFunctionType* fty = isaFunction(type)) |
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90 return fty; |
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91 else if (const LLPointerType* pty = isaPointer(type)) |
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92 { |
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93 if (const LLFunctionType* fty = isaFunction(pty->getElementType())) |
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94 return fty; |
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95 } |
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96 return NULL; |
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97 } |
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98 |
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99 ////////////////////////////////////////////////////////////////////////////////////////// |
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100 |
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101 void DtoBuildDVarArgList(std::vector<LLValue*>& args, llvm::PAListPtr& palist, TypeFunction* tf, Expressions* arguments, size_t argidx) |
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102 { |
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103 Logger::println("doing d-style variadic arguments"); |
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104 |
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105 std::vector<const LLType*> vtypes; |
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106 |
414
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107 // number of non variadic args |
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108 int begin = tf->parameters->dim; |
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109 Logger::println("num non vararg params = %d", begin); |
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110 |
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111 // build struct with argument types (non variadic args) |
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112 for (int i=begin; i<arguments->dim; i++) |
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113 { |
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114 Expression* argexp = (Expression*)arguments->data[i]; |
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115 vtypes.push_back(DtoType(argexp->type)); |
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116 size_t sz = getABITypeSize(vtypes.back()); |
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117 if (sz < PTRSIZE) |
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118 vtypes.back() = DtoSize_t(); |
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119 } |
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120 const LLStructType* vtype = LLStructType::get(vtypes); |
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121 Logger::cout() << "d-variadic argument struct type:\n" << *vtype << '\n'; |
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122 LLValue* mem = DtoAlloca(vtype,"_argptr_storage"); |
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123 |
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124 // store arguments in the struct |
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125 for (int i=begin,k=0; i<arguments->dim; i++,k++) |
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126 { |
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127 Expression* argexp = (Expression*)arguments->data[i]; |
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128 if (global.params.llvmAnnotate) |
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129 DtoAnnotation(argexp->toChars()); |
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130 LLValue* argdst = DtoGEPi(mem,0,k); |
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131 argdst = DtoBitCast(argdst, getPtrToType(DtoType(argexp->type))); |
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132 DtoVariadicArgument(argexp, argdst); |
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133 } |
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134 |
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135 // build type info array |
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136 assert(Type::typeinfo->ir.irStruct->constInit); |
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137 const LLType* typeinfotype = DtoType(Type::typeinfo->type); |
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138 const LLArrayType* typeinfoarraytype = LLArrayType::get(typeinfotype,vtype->getNumElements()); |
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139 |
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140 llvm::GlobalVariable* typeinfomem = |
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141 new llvm::GlobalVariable(typeinfoarraytype, true, llvm::GlobalValue::InternalLinkage, NULL, "._arguments.storage", gIR->module); |
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142 Logger::cout() << "_arguments storage: " << *typeinfomem << '\n'; |
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143 |
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144 std::vector<LLConstant*> vtypeinfos; |
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145 for (int i=begin,k=0; i<arguments->dim; i++,k++) |
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146 { |
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147 Expression* argexp = (Expression*)arguments->data[i]; |
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148 vtypeinfos.push_back(DtoTypeInfoOf(argexp->type)); |
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149 } |
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150 |
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151 // apply initializer |
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152 LLConstant* tiinits = llvm::ConstantArray::get(typeinfoarraytype, vtypeinfos); |
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153 typeinfomem->setInitializer(tiinits); |
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154 |
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155 // put data in d-array |
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156 std::vector<LLConstant*> pinits; |
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157 pinits.push_back(DtoConstSize_t(vtype->getNumElements())); |
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158 pinits.push_back(llvm::ConstantExpr::getBitCast(typeinfomem, getPtrToType(typeinfotype))); |
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159 const LLType* tiarrty = DtoType(Type::typeinfo->type->arrayOf()); |
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160 tiinits = llvm::ConstantStruct::get(pinits); |
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161 LLValue* typeinfoarrayparam = new llvm::GlobalVariable(tiarrty, |
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162 true, llvm::GlobalValue::InternalLinkage, tiinits, "._arguments.array", gIR->module); |
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163 |
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164 // specify arguments |
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165 args.push_back(typeinfoarrayparam); |
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166 ++argidx; |
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167 args.push_back(gIR->ir->CreateBitCast(mem, getPtrToType(LLType::Int8Ty), "tmp")); |
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168 ++argidx; |
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169 |
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170 // pass non variadic args |
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171 for (int i=0; i<begin; i++) |
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172 { |
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173 Argument* fnarg = Argument::getNth(tf->parameters, i); |
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174 DValue* argval = DtoArgument(fnarg, (Expression*)arguments->data[i]); |
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175 args.push_back(argval->getRVal()); |
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176 |
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177 if (fnarg->llvmAttrs) |
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178 palist = palist.addAttr(argidx, fnarg->llvmAttrs); |
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179 |
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180 ++argidx; |
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181 } |
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182 } |
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183 |
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184 |
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185 DValue* DtoCallFunction(Loc& loc, Type* resulttype, DValue* fnval, Expressions* arguments) |
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186 { |
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187 // the callee D type |
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188 Type* calleeType = fnval->getType(); |
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189 |
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190 // if the type has not yet been processed, do so now |
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191 if (calleeType->ir.type == NULL) |
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192 DtoType(calleeType); |
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193 |
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194 // get func value if any |
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195 DFuncValue* dfnval = fnval->isFunc(); |
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196 |
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197 // handle special vararg intrinsics |
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198 bool va_intrinsic = (dfnval && dfnval->func && dfnval->func->isVaIntrinsic()); |
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199 |
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200 // get function type info |
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201 TypeFunction* tf = DtoTypeFunction(fnval); |
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202 |
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203 // misc |
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204 bool retinptr = tf->retInPtr; |
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205 bool thiscall = tf->usesThis; |
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206 bool delegatecall = (calleeType->toBasetype()->ty == Tdelegate); |
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207 bool nestedcall = tf->usesNest; |
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208 bool dvarargs = (tf->linkage == LINKd && tf->varargs == 1); |
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209 |
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210 unsigned callconv = DtoCallingConv(tf->linkage); |
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211 |
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212 // get callee llvm value |
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213 LLValue* callable = DtoCallableValue(fnval); |
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214 const LLFunctionType* callableTy = DtoExtractFunctionType(callable->getType()); |
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215 assert(callableTy); |
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216 |
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217 // get llvm argument iterator, for types |
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218 LLFunctionType::param_iterator argbegin = callableTy->param_begin(); |
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219 LLFunctionType::param_iterator argiter = argbegin; |
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220 |
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221 // parameter attributes |
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222 llvm::PAListPtr palist; |
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223 |
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224 // return attrs |
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225 if (tf->retAttrs) |
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226 palist = palist.addAttr(0, tf->retAttrs); |
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227 |
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228 // handle implicit arguments |
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229 std::vector<LLValue*> args; |
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230 |
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231 // return in hidden ptr is first |
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232 if (retinptr) |
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233 { |
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234 LLValue* retvar = DtoAlloca(argiter->get()->getContainedType(0), ".rettmp"); |
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235 ++argiter; |
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236 args.push_back(retvar); |
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237 palist = palist.addAttr(1, llvm::ParamAttr::StructRet); |
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238 } |
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239 |
422
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240 // then comes a context argument... |
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241 if(thiscall || delegatecall || nestedcall) |
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242 { |
422
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243 // ... which can be a 'this' argument |
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244 if (thiscall) |
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245 { |
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246 assert(dfnval && dfnval->vthis); |
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247 LLValue* thisarg = DtoBitCast(dfnval->vthis, argiter->get()); |
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248 ++argiter; |
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249 args.push_back(thisarg); |
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250 } |
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251 // ... or a delegate context arg |
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252 else if (delegatecall) |
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253 { |
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254 LLValue* ctxarg = DtoLoad(DtoGEPi(fnval->getRVal(), 0,0)); |
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255 assert(ctxarg->getType() == argiter->get()); |
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256 ++argiter; |
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257 args.push_back(ctxarg); |
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258 } |
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259 // ... or a nested function context arg |
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260 else if (nestedcall) |
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261 { |
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262 LLValue* contextptr = DtoNestedContext(loc, dfnval->func); |
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263 contextptr = DtoBitCast(contextptr, getVoidPtrType()); |
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264 ++argiter; |
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265 args.push_back(contextptr); |
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266 } |
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267 else |
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268 { |
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269 error(loc, "Context argument required but none given"); |
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270 fatal(); |
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271 } |
414
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272 } |
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273 |
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274 // handle the rest of the arguments based on param passing style |
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275 |
414
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276 // variadic instrinsics need some custom casts |
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277 if (va_intrinsic) |
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278 { |
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279 size_t n = arguments->dim; |
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280 for (int i=0; i<n; i++) |
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281 { |
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282 Expression* exp = (Expression*)arguments->data[i]; |
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283 DValue* expelem = exp->toElem(gIR); |
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284 // cast to va_list* |
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285 LLValue* val = DtoBitCast(expelem->getLVal(), getVoidPtrType()); |
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286 ++argiter; |
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287 args.push_back(val); |
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288 } |
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289 } |
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290 |
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291 // d style varargs needs a few more hidden arguments as well as special passing |
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292 else if (dvarargs) |
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293 { |
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294 DtoBuildDVarArgList(args, palist, tf, arguments, argiter-argbegin+1); |
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295 } |
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296 |
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297 // otherwise we're looking at a normal function call |
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298 else |
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299 { |
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300 Logger::println("doing normal arguments"); |
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301 for (int i=0; i<arguments->dim; i++) { |
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302 int j = argiter-argbegin; |
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303 Argument* fnarg = Argument::getNth(tf->parameters, i); |
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304 DValue* argval = DtoArgument(fnarg, (Expression*)arguments->data[i]); |
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305 LLValue* arg = argval->getRVal(); |
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306 if (fnarg) // can fnarg ever be null in this block? |
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307 { |
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308 if (arg->getType() != callableTy->getParamType(j)) |
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309 arg = DtoBitCast(arg, callableTy->getParamType(j)); |
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310 if (fnarg->llvmAttrs) |
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311 palist = palist.addAttr(j+1, fnarg->llvmAttrs); |
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312 } |
414
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313 ++argiter; |
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314 args.push_back(arg); |
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315 } |
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316 } |
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317 |
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318 #if 0 |
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319 Logger::println("%d params passed", n); |
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320 for (int i=0; i<args.size(); ++i) { |
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321 assert(args[i]); |
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322 Logger::cout() << "arg["<<i<<"] = " << *args[i] << '\n'; |
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323 } |
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324 #endif |
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325 |
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326 // void returns cannot not be named |
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327 const char* varname = ""; |
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328 if (callableTy->getReturnType() != LLType::VoidTy) |
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329 varname = "tmp"; |
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330 |
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331 //Logger::cout() << "Calling: " << *funcval << '\n'; |
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332 |
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333 // call the function |
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334 CallOrInvoke* call = gIR->CreateCallOrInvoke(callable, args.begin(), args.end(), varname); |
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335 |
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336 // get return value |
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337 LLValue* retllval = (retinptr) ? args[0] : call->get(); |
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338 |
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339 // if the type of retllval is abstract, refine to concrete |
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340 if (retllval->getType()->isAbstract()) |
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341 retllval = DtoBitCast(retllval, getPtrToType(DtoType(resulttype)), "retval"); |
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342 |
445
cc40db549aea
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343 // set calling convention and parameter attributes |
414
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344 if (dfnval && dfnval->func) |
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345 { |
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346 LLFunction* llfunc = llvm::dyn_cast<LLFunction>(dfnval->val); |
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347 if (llfunc && llfunc->isIntrinsic()) |
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348 palist = llvm::Intrinsic::getParamAttrs((llvm::Intrinsic::ID)llfunc->getIntrinsicID()); |
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349 else |
414
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350 call->setCallingConv(callconv); |
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351 } |
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352 else |
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353 call->setCallingConv(callconv); |
347
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354 call->setParamAttrs(palist); |
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355 |
486
a34078905d01
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356 return new DImValue(resulttype, retllval); |
347
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357 } |
414
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358 |
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359 |
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360 |
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361 |
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362 |
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363 |
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364 |
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365 |
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366 |
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367 |
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368 |
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369 |
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370 |