Mercurial > projects > ldc
annotate gen/functions.cpp @ 715:30b42a283c8e
Removed TypeOpaque from DMD.
Changed runtime functions taking opaque[] to void[].
Implemented proper type painting, to avoid "resizing" array casts in runtime calls that previously took opaque[].
Implemented dynamic arrays as first class types, this implements proper ABI for these types on x86.
Added dwarf region end after call to assert function, fixes some problems with llvm not allowing this to be missing.
Reverted change to WithStatement from rev [704] it breaks MiniD, mini/with2.d needs to be fixed some other way...
Fixed tango bug 1339 in runtime, problem with _adReverseChar on invalid UTF-8.
Disabled .bc generation in the compiler runtime part, genobj.d triggers some llvm bug when using debug info. the .o seems to work fine.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Wed, 22 Oct 2008 14:55:33 +0200 |
parents | df196c8dea26 |
children | 7261ff0f95ff |
rev | line source |
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100 | 1 #include "gen/llvm.h" |
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2 #include "llvm/Support/CFG.h" |
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3 #include "llvm/Intrinsics.h" |
100 | 4 |
5 #include "mtype.h" | |
6 #include "aggregate.h" | |
7 #include "init.h" | |
8 #include "declaration.h" | |
9 #include "template.h" | |
10 #include "module.h" | |
11 #include "statement.h" | |
12 | |
13 #include "gen/irstate.h" | |
14 #include "gen/tollvm.h" | |
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15 #include "gen/llvmhelpers.h" |
100 | 16 #include "gen/runtime.h" |
17 #include "gen/arrays.h" | |
18 #include "gen/logger.h" | |
19 #include "gen/functions.h" | |
20 #include "gen/todebug.h" | |
21 #include "gen/classes.h" | |
131 | 22 #include "gen/dvalue.h" |
100 | 23 |
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24 const llvm::FunctionType* DtoFunctionType(Type* type, const LLType* thistype, const LLType* nesttype, bool ismain) |
100 | 25 { |
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26 assert(type->ty == Tfunction); |
100 | 27 TypeFunction* f = (TypeFunction*)type; |
28 | |
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29 if (type->ir.type != NULL) { |
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30 return llvm::cast<llvm::FunctionType>(type->ir.type->get()); |
100 | 31 } |
32 | |
33 bool typesafeVararg = false; | |
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34 bool arrayVararg = false; |
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35 if (f->linkage == LINKd) |
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36 { |
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37 if (f->varargs == 1) |
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38 typesafeVararg = true; |
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39 else if (f->varargs == 2) |
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40 arrayVararg = true; |
100 | 41 } |
42 | |
43 // return value type | |
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44 const LLType* rettype; |
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45 const LLType* actualRettype; |
100 | 46 Type* rt = f->next; |
47 bool retinptr = false; | |
48 bool usesthis = false; | |
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49 bool usesnest = false; |
100 | 50 |
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51 // parameter types |
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52 std::vector<const LLType*> paramvec; |
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53 |
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54 if (ismain) |
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55 { |
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56 rettype = LLType::Int32Ty; |
100 | 57 actualRettype = rettype; |
234
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58 if (Argument::dim(f->parameters) == 0) |
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59 { |
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60 const LLType* arrTy = DtoArrayType(LLType::Int8Ty); |
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61 const LLType* arrArrTy = DtoArrayType(arrTy); |
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62 paramvec.push_back(arrArrTy); |
234
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63 } |
100 | 64 } |
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65 else{ |
100 | 66 assert(rt); |
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67 if (DtoIsReturnedInArg(rt)) { |
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68 rettype = getPtrToType(DtoType(rt)); |
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69 actualRettype = LLType::VoidTy; |
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70 f->retInPtr = retinptr = true; |
100 | 71 } |
72 else { | |
73 rettype = DtoType(rt); | |
74 actualRettype = rettype; | |
75 } | |
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76 |
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77 if (unsigned ea = DtoShouldExtend(rt)) |
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78 { |
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79 f->retAttrs |= ea; |
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80 } |
100 | 81 } |
82 | |
83 if (retinptr) { | |
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84 //Logger::cout() << "returning through pointer parameter: " << *rettype << '\n'; |
100 | 85 paramvec.push_back(rettype); |
86 } | |
87 | |
88 if (thistype) { | |
89 paramvec.push_back(thistype); | |
90 usesthis = true; | |
91 } | |
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92 else if (nesttype) { |
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93 paramvec.push_back(nesttype); |
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94 usesnest = true; |
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95 } |
100 | 96 |
97 if (typesafeVararg) { | |
98 ClassDeclaration* ti = Type::typeinfo; | |
336 | 99 ti->toObjFile(0); // TODO: multiobj |
102
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100 DtoForceConstInitDsymbol(ti); |
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101 assert(ti->ir.irStruct->constInit); |
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102 std::vector<const LLType*> types; |
100 | 103 types.push_back(DtoSize_t()); |
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104 types.push_back(getPtrToType(getPtrToType(ti->ir.irStruct->constInit->getType()))); |
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105 const LLType* t1 = llvm::StructType::get(types); |
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106 paramvec.push_back(t1); |
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107 paramvec.push_back(getPtrToType(LLType::Int8Ty)); |
100 | 108 } |
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109 else if (arrayVararg) |
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110 { |
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111 // do nothing? |
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112 } |
100 | 113 |
114 size_t n = Argument::dim(f->parameters); | |
115 | |
116 for (int i=0; i < n; ++i) { | |
117 Argument* arg = Argument::getNth(f->parameters, i); | |
118 // ensure scalar | |
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119 Type* argT = arg->type->toBasetype(); |
100 | 120 assert(argT); |
121 | |
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122 bool refOrOut = ((arg->storageClass & STCref) || (arg->storageClass & STCout)); |
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123 |
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124 const LLType* at = DtoType(argT); |
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125 |
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126 // opaque types need special handling |
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127 if (llvm::isa<llvm::OpaqueType>(at)) { |
100 | 128 Logger::println("opaque param"); |
129 assert(argT->ty == Tstruct || argT->ty == Tclass); | |
133
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130 paramvec.push_back(getPtrToType(at)); |
100 | 131 } |
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132 // structs and delegates are passed as a reference, but by value |
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133 else if (argT->ty == Tstruct || argT->ty == Tdelegate) { |
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134 Logger::println("struct/sarray param"); |
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135 if (!refOrOut) |
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136 arg->llvmAttrs |= llvm::Attribute::ByVal; |
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137 paramvec.push_back(getPtrToType(at)); |
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138 } |
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139 // static arrays are passed directly by reference |
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140 else if (argT->ty == Tsarray) |
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141 { |
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142 Logger::println("static array param"); |
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143 at = getPtrToType(at); |
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144 paramvec.push_back(at); |
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145 } |
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146 // firstclass ' ref/out ' parameter |
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147 else if (refOrOut) { |
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148 Logger::println("ref/out param"); |
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149 at = getPtrToType(at); |
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150 paramvec.push_back(at); |
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151 } |
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152 // firstclass ' in ' parameter |
100 | 153 else { |
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154 Logger::println("in param"); |
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155 if (unsigned ea = DtoShouldExtend(argT)) |
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156 arg->llvmAttrs |= ea; |
100 | 157 paramvec.push_back(at); |
158 } | |
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159 |
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160 // handle lazy args |
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161 if (arg->storageClass & STClazy) |
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162 { |
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163 if (Logger::enabled()) |
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164 Logger::cout() << "for lazy got: " << *paramvec.back() << '\n'; |
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165 |
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166 TypeFunction *ltf = new TypeFunction(NULL, arg->type, 0, LINKd); |
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167 TypeDelegate *ltd = new TypeDelegate(ltf); |
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168 at = getPtrToType(DtoType(ltd)); |
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169 |
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170 if (Logger::enabled()) |
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171 Logger::cout() << "lazy updated to: " << *at << '\n'; |
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172 |
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173 paramvec.back() = at; |
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174 // lazy doesn't need byval as the delegate is not visible to the user |
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175 } |
100 | 176 } |
177 | |
178 // construct function type | |
162
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179 bool isvararg = !(typesafeVararg || arrayVararg) && f->varargs; |
100 | 180 llvm::FunctionType* functype = llvm::FunctionType::get(actualRettype, paramvec, isvararg); |
181 | |
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182 f->retInPtr = retinptr; |
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183 f->usesThis = usesthis; |
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184 f->usesNest = usesnest; |
100 | 185 |
217
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186 f->ir.type = new llvm::PATypeHolder(functype); |
100 | 187 |
188 return functype; | |
189 } | |
190 | |
191 ////////////////////////////////////////////////////////////////////////////////////////// | |
192 | |
193 static const llvm::FunctionType* DtoVaFunctionType(FuncDeclaration* fdecl) | |
194 { | |
102
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195 // type has already been resolved |
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196 if (fdecl->type->ir.type != 0) { |
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197 return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); |
102
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198 } |
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199 |
100 | 200 TypeFunction* f = (TypeFunction*)fdecl->type; |
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201 const llvm::FunctionType* fty = 0; |
100 | 202 |
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203 if (fdecl->llvmInternal == LLVMva_start) |
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204 fty = GET_INTRINSIC_DECL(vastart)->getFunctionType(); |
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205 else if (fdecl->llvmInternal == LLVMva_copy) |
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206 fty = GET_INTRINSIC_DECL(vacopy)->getFunctionType(); |
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207 else if (fdecl->llvmInternal == LLVMva_end) |
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208 fty = GET_INTRINSIC_DECL(vaend)->getFunctionType(); |
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209 assert(fty); |
100 | 210 |
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211 f->ir.type = new llvm::PATypeHolder(fty); |
100 | 212 return fty; |
213 } | |
214 | |
215 ////////////////////////////////////////////////////////////////////////////////////////// | |
216 | |
217 const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl) | |
218 { | |
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219 // handle for C vararg intrinsics |
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220 if (fdecl->isVaIntrinsic()) |
100 | 221 return DtoVaFunctionType(fdecl); |
222 | |
223 // type has already been resolved | |
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224 if (fdecl->type->ir.type != 0) |
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225 return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); |
100 | 226 |
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227 const LLType* thisty = 0; |
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228 const LLType* nestty = 0; |
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229 |
100 | 230 if (fdecl->needThis()) { |
132 | 231 if (AggregateDeclaration* ad = fdecl->isMember2()) { |
232 Logger::println("isMember = this is: %s", ad->type->toChars()); | |
100 | 233 thisty = DtoType(ad->type); |
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234 //Logger::cout() << "this llvm type: " << *thisty << '\n'; |
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235 if (isaStruct(thisty) || (!gIR->structs.empty() && thisty == gIR->topstruct()->recty.get())) |
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236 thisty = getPtrToType(thisty); |
100 | 237 } |
132 | 238 else { |
239 Logger::println("chars: %s type: %s kind: %s", fdecl->toChars(), fdecl->type->toChars(), fdecl->kind()); | |
240 assert(0); | |
241 } | |
100 | 242 } |
243 else if (fdecl->isNested()) { | |
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244 nestty = getPtrToType(LLType::Int8Ty); |
100 | 245 } |
246 | |
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247 const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, nestty, fdecl->isMain()); |
100 | 248 |
249 return functype; | |
250 } | |
251 | |
252 ////////////////////////////////////////////////////////////////////////////////////////// | |
253 | |
254 static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl) | |
255 { | |
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256 TypeFunction* f = (TypeFunction*)fdecl->type->toBasetype(); |
100 | 257 const llvm::FunctionType* fty = DtoVaFunctionType(fdecl); |
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258 llvm::Function* func = 0; |
100 | 259 |
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260 if (fdecl->llvmInternal == LLVMva_start) |
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261 func = GET_INTRINSIC_DECL(vastart); |
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262 else if (fdecl->llvmInternal == LLVMva_copy) |
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263 func = GET_INTRINSIC_DECL(vacopy); |
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264 else if (fdecl->llvmInternal == LLVMva_end) |
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265 func = GET_INTRINSIC_DECL(vaend); |
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266 assert(func); |
100 | 267 |
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268 fdecl->ir.irFunc->func = func; |
100 | 269 return func; |
270 } | |
271 | |
272 ////////////////////////////////////////////////////////////////////////////////////////// | |
273 | |
102
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274 void DtoResolveFunction(FuncDeclaration* fdecl) |
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275 { |
121
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276 if (!global.params.useUnitTests && fdecl->isUnitTestDeclaration()) { |
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277 return; // ignore declaration completely |
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278 } |
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279 |
133
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280 // is imported and we don't have access? |
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281 if (fdecl->getModule() != gIR->dmodule) |
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282 { |
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283 if (fdecl->prot() == PROTprivate) |
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284 return; |
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285 } |
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286 |
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287 if (fdecl->ir.resolved) return; |
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288 fdecl->ir.resolved = true; |
102
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289 |
132 | 290 Logger::println("DtoResolveFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
102
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291 LOG_SCOPE; |
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292 |
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293 //printf("resolve function: %s\n", fdecl->toPrettyChars()); |
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294 |
102
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295 if (fdecl->parent) |
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296 if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance()) |
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297 { |
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298 TemplateDeclaration* tempdecl = tinst->tempdecl; |
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299 if (tempdecl->llvmInternal == LLVMva_arg) |
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300 { |
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301 Logger::println("magic va_arg found"); |
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302 fdecl->llvmInternal = LLVMva_arg; |
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303 fdecl->ir.declared = true; |
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304 fdecl->ir.initialized = true; |
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305 fdecl->ir.defined = true; |
102
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306 return; // this gets mapped to an instruction so a declaration makes no sence |
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307 } |
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308 else if (tempdecl->llvmInternal == LLVMva_start) |
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309 { |
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310 Logger::println("magic va_start found"); |
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311 fdecl->llvmInternal = LLVMva_start; |
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312 } |
527
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313 else if (tempdecl->llvmInternal == LLVMintrinsic) |
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314 { |
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315 Logger::println("overloaded intrinsic found"); |
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316 fdecl->llvmInternal = LLVMintrinsic; |
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317 DtoOverloadedIntrinsicName(tinst, tempdecl, fdecl->intrinsicName); |
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318 } |
102
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319 } |
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320 |
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321 DtoFunctionType(fdecl); |
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322 |
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323 // queue declaration |
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324 if (!fdecl->isAbstract()) |
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325 gIR->declareList.push_back(fdecl); |
102
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326 } |
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327 |
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328 ////////////////////////////////////////////////////////////////////////////////////////// |
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329 |
240
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330 static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclaration* fdecl) |
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331 { |
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332 int llidx = 1; |
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333 if (f->retInPtr) ++llidx; |
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334 if (f->usesThis) ++llidx; |
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335 else if (f->usesNest) ++llidx; |
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336 if (f->linkage == LINKd && f->varargs == 1) |
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337 llidx += 2; |
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338 |
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339 int funcNumArgs = func->getArgumentList().size(); |
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340 std::vector<llvm::AttributeWithIndex> attrs; |
240
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341 int k = 0; |
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342 |
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343 llvm::AttributeWithIndex PAWI; |
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344 |
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345 // set return value attrs if any |
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346 if (f->retAttrs) |
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347 { |
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348 PAWI.Index = 0; |
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349 PAWI.Attrs = f->retAttrs; |
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350 attrs.push_back(PAWI); |
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351 } |
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352 |
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353 // set sret param |
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354 if (f->retInPtr) |
454
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355 { |
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356 PAWI.Index = 1; |
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357 PAWI.Attrs = llvm::Attribute::StructRet; |
454
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358 attrs.push_back(PAWI); |
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359 } |
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360 |
445
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361 // set attrs on the rest of the arguments |
454
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362 for (; llidx <= funcNumArgs && Argument::dim(f->parameters) > k; ++llidx,++k) |
240
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363 { |
454
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364 Argument* fnarg = Argument::getNth(f->parameters, k); |
240
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365 assert(fnarg); |
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366 |
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367 PAWI.Index = llidx; |
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368 PAWI.Attrs = fnarg->llvmAttrs; |
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369 |
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370 if (PAWI.Attrs) |
240
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371 attrs.push_back(PAWI); |
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372 } |
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373 |
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374 llvm::AttrListPtr palist = llvm::AttrListPtr::get(attrs.begin(), attrs.end()); |
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375 func->setAttributes(palist); |
240
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376 } |
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377 |
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378 ////////////////////////////////////////////////////////////////////////////////////////// |
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379 |
100 | 380 void DtoDeclareFunction(FuncDeclaration* fdecl) |
381 { | |
173
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382 if (fdecl->ir.declared) return; |
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383 fdecl->ir.declared = true; |
102
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384 |
132 | 385 Logger::println("DtoDeclareFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
100 | 386 LOG_SCOPE; |
387 | |
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388 //printf("declare function: %s\n", fdecl->toPrettyChars()); |
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389 |
121
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390 // intrinsic sanity check |
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391 if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) { |
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392 error(fdecl->loc, "intrinsics cannot have function bodies"); |
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393 fatal(); |
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394 } |
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395 |
240
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396 // get TypeFunction* |
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397 Type* t = fdecl->type->toBasetype(); |
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398 TypeFunction* f = (TypeFunction*)t; |
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399 |
100 | 400 bool declareOnly = false; |
102
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401 bool templInst = fdecl->parent && DtoIsTemplateInstance(fdecl->parent); |
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402 if (!templInst && fdecl->getModule() != gIR->dmodule) |
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403 { |
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404 Logger::println("not template instance, and not in this module. declare only!"); |
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405 Logger::println("current module: %s", gIR->dmodule->ident->toChars()); |
378
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406 if(fdecl->getModule()) |
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407 Logger::println("func module: %s", fdecl->getModule()->ident->toChars()); |
379
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408 else { |
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409 Logger::println("func not in a module, is runtime"); |
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410 } |
102
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411 declareOnly = true; |
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412 } |
102
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413 else if (fdecl->llvmInternal == LLVMva_start) |
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414 declareOnly = true; |
100 | 415 |
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416 if (!fdecl->ir.irFunc) { |
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417 fdecl->ir.irFunc = new IrFunction(fdecl); |
100 | 418 } |
419 | |
420 // mangled name | |
443
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421 const char* mangled_name; |
100 | 422 if (fdecl->llvmInternal == LLVMintrinsic) |
443
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423 mangled_name = fdecl->intrinsicName.c_str(); |
100 | 424 else |
425 mangled_name = fdecl->mangle(); | |
426 | |
427 llvm::Function* vafunc = 0; | |
445
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428 if (fdecl->isVaIntrinsic()) |
100 | 429 vafunc = DtoDeclareVaFunction(fdecl); |
430 | |
431 // construct function | |
432 const llvm::FunctionType* functype = DtoFunctionType(fdecl); | |
433 llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name); | |
434 if (!func) | |
205
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435 func = llvm::Function::Create(functype, DtoLinkage(fdecl), mangled_name, gIR->module); |
100 | 436 |
437 // add func to IRFunc | |
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438 fdecl->ir.irFunc->func = func; |
100 | 439 |
440 // calling convention | |
441 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic) | |
442 func->setCallingConv(DtoCallingConv(f->linkage)); | |
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443 else // fall back to C, it should be the right thing to do |
132 | 444 func->setCallingConv(llvm::CallingConv::C); |
445 | |
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446 fdecl->ir.irFunc->func = func; |
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447 assert(llvm::isa<llvm::FunctionType>(f->ir.type->get())); |
100 | 448 |
217
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449 // parameter attributes |
454
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450 if (!fdecl->isIntrinsic()) { |
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451 set_param_attrs(f, func, fdecl); |
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452 } |
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453 |
116
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454 // main |
100 | 455 if (fdecl->isMain()) { |
456 gIR->mainFunc = func; | |
457 } | |
458 | |
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459 // static ctor |
163
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460 if (fdecl->isStaticCtorDeclaration() && fdecl->getModule() == gIR->dmodule) { |
116
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461 gIR->ctors.push_back(fdecl); |
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462 } |
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463 // static dtor |
163
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464 else if (fdecl->isStaticDtorDeclaration() && fdecl->getModule() == gIR->dmodule) { |
116
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465 gIR->dtors.push_back(fdecl); |
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466 } |
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467 |
162
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468 // we never reference parameters of function prototypes |
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469 if (!declareOnly) |
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470 { |
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471 // name parameters |
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472 llvm::Function::arg_iterator iarg = func->arg_begin(); |
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473 int k = 0; |
486
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474 if (f->retInPtr) { |
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475 iarg->setName(".sretarg"); |
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476 fdecl->ir.irFunc->retArg = iarg; |
162
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477 ++iarg; |
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478 } |
486
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479 |
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480 if (f->usesThis) { |
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481 iarg->setName("this"); |
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482 fdecl->ir.irFunc->thisArg = iarg; |
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483 assert(fdecl->ir.irFunc->thisArg); |
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484 ++iarg; |
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485 } |
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486 else if (f->usesNest) { |
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487 iarg->setName(".nest"); |
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488 fdecl->ir.irFunc->nestArg = iarg; |
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489 assert(fdecl->ir.irFunc->nestArg); |
162
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490 ++iarg; |
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491 } |
119
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492 |
162
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493 if (f->linkage == LINKd && f->varargs == 1) { |
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494 iarg->setName("_arguments"); |
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495 fdecl->ir.irFunc->_arguments = iarg; |
162
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496 ++iarg; |
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497 iarg->setName("_argptr"); |
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498 fdecl->ir.irFunc->_argptr = iarg; |
162
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499 ++iarg; |
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500 } |
119
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501 |
162
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502 for (; iarg != func->arg_end(); ++iarg) |
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503 { |
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504 if (fdecl->parameters && fdecl->parameters->dim > k) |
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505 { |
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506 Dsymbol* argsym = (Dsymbol*)fdecl->parameters->data[k++]; |
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507 VarDeclaration* argvd = argsym->isVarDeclaration(); |
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508 assert(argvd); |
173
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509 assert(!argvd->ir.irLocal); |
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510 argvd->ir.irLocal = new IrLocal(argvd); |
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511 argvd->ir.irLocal->value = iarg; |
162
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512 iarg->setName(argvd->ident->toChars()); |
100 | 513 } |
162
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514 else |
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515 { |
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516 iarg->setName("unnamed"); |
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517 } |
100 | 518 } |
519 } | |
520 | |
121
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521 if (fdecl->isUnitTestDeclaration()) |
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522 gIR->unitTests.push_back(fdecl); |
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523 |
100 | 524 if (!declareOnly) |
102
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525 gIR->defineList.push_back(fdecl); |
133
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526 else |
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527 assert(func->getLinkage() != llvm::GlobalValue::InternalLinkage); |
100 | 528 |
622
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529 if (Logger::enabled()) |
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585
diff
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|
530 Logger::cout() << "func decl: " << *func << '\n'; |
100 | 531 } |
532 | |
533 ////////////////////////////////////////////////////////////////////////////////////////// | |
534 | |
535 void DtoDefineFunc(FuncDeclaration* fd) | |
536 { | |
173
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537 if (fd->ir.defined) return; |
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538 fd->ir.defined = true; |
102
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539 |
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540 assert(fd->ir.declared); |
108
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541 |
132 | 542 Logger::println("DtoDefineFunc(%s): %s", fd->toPrettyChars(), fd->loc.toChars()); |
102
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543 LOG_SCOPE; |
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544 |
546
406aee3416bb
Removed D_InlineAsm and D_InlineAsm_X86 versions.
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|
545 // error on naked |
486
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|
546 if (fd->naked) |
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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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547 { |
546
406aee3416bb
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527
diff
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|
548 fd->error("naked is not supported"); |
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Removed D_InlineAsm and D_InlineAsm_X86 versions.
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|
549 fatal(); |
486
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550 } |
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|
551 |
100 | 552 // debug info |
553 if (global.params.symdebug) { | |
554 Module* mo = fd->getModule(); | |
250
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diff
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|
555 fd->ir.irFunc->dwarfSubProg = DtoDwarfSubProgram(fd); |
100 | 556 } |
557 | |
486
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558 Type* t = fd->type->toBasetype(); |
100 | 559 TypeFunction* f = (TypeFunction*)t; |
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560 assert(f->ir.type); |
100 | 561 |
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562 llvm::Function* func = fd->ir.irFunc->func; |
100 | 563 const llvm::FunctionType* functype = func->getFunctionType(); |
564 | |
565 // only members of the current module or template instances maybe be defined | |
244
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566 if (!(fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent))) |
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567 return; |
100 | 568 |
244
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|
569 // set module owner |
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diff
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|
570 fd->ir.DModule = gIR->dmodule; |
205
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[svn r221] Update: Switched to the 2.3 LLVM svn branch, http://llvm.org/svn/llvm-project/llvm/branches/release_23 .
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|
571 |
244
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|
572 // is there a body? |
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diff
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573 if (fd->fbody == NULL) |
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diff
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574 return; |
100 | 575 |
244
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576 Logger::println("Doing function body for: %s", fd->toChars()); |
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|
577 assert(fd->ir.irFunc); |
468
45a67b6f1310
Removed the 'needsstorage' thing from Dsymbol. Arguments are not always given storage when applicable. This is not longer treat specially
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parents:
457
diff
changeset
|
578 IrFunction* irfunction = fd->ir.irFunc; |
45a67b6f1310
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|
579 gIR->functions.push_back(irfunction); |
108
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diff
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|
580 |
244
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|
581 if (fd->isMain()) |
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|
582 gIR->emitMain = true; |
162
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583 |
244
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|
584 std::string entryname("entry_"); |
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|
585 entryname.append(fd->toPrettyChars()); |
162
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|
586 |
244
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diff
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|
587 llvm::BasicBlock* beginbb = llvm::BasicBlock::Create(entryname,func); |
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diff
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|
588 llvm::BasicBlock* endbb = llvm::BasicBlock::Create("endentry",func); |
100 | 589 |
244
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590 //assert(gIR->scopes.empty()); |
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591 gIR->scopes.push_back(IRScope(beginbb, endbb)); |
108
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592 |
244
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593 // create alloca point |
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594 llvm::Instruction* allocaPoint = new llvm::AllocaInst(LLType::Int32Ty, "alloca point", beginbb); |
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595 irfunction->allocapoint = allocaPoint; |
100 | 596 |
452
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597 // debug info - after all allocas, but before any llvm.dbg.declare etc |
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598 if (global.params.symdebug) DtoDwarfFuncStart(fd); |
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599 |
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600 // need result variable? |
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601 if (fd->vresult) { |
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602 Logger::println("vresult value"); |
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603 fd->vresult->ir.irLocal = new IrLocal(fd->vresult); |
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604 fd->vresult->ir.irLocal->value = DtoAlloca(DtoType(fd->vresult->type), "function_vresult"); |
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605 } |
526
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606 |
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607 // this hack makes sure the frame pointer elimination optimization is disabled. |
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608 // this this eliminates a bunch of inline asm related issues. |
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609 // naked must always eliminate the framepointer however... |
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610 if (fd->inlineAsm && !fd->naked) |
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611 { |
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612 // emit a call to llvm_eh_unwind_init |
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613 LLFunction* hack = GET_INTRINSIC_DECL(eh_unwind_init); |
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614 gIR->ir->CreateCall(hack, ""); |
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615 } |
100 | 616 |
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617 // give the 'this' argument storage and debug info |
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618 if (f->usesThis) |
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619 { |
486
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620 LLValue* thisvar = irfunction->thisArg; |
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621 assert(thisvar); |
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622 |
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623 LLValue* thismem = DtoAlloca(thisvar->getType(), ".this"); |
468
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624 DtoStore(thisvar, thismem); |
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625 irfunction->thisArg = thismem; |
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626 |
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627 assert(!fd->vthis->ir.irLocal); |
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628 fd->vthis->ir.irLocal = new IrLocal(fd->vthis); |
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629 fd->vthis->ir.irLocal->value = thismem; |
468
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630 |
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631 if (global.params.symdebug) |
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632 DtoDwarfLocalVariable(thismem, fd->vthis); |
486
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633 |
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634 if (fd->vthis->nestedref) |
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635 fd->nestedVars.insert(fd->vthis); |
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636 } |
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637 |
244
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638 // give arguments storage |
468
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639 // and debug info |
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640 if (fd->parameters) |
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641 { |
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642 size_t n = fd->parameters->dim; |
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643 for (int i=0; i < n; ++i) |
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644 { |
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645 Dsymbol* argsym = (Dsymbol*)fd->parameters->data[i]; |
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646 VarDeclaration* vd = argsym->isVarDeclaration(); |
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647 assert(vd); |
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648 |
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649 if (vd->nestedref) |
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650 fd->nestedVars.insert(vd); |
100 | 651 |
468
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652 IrLocal* irloc = vd->ir.irLocal; |
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653 assert(irloc); |
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654 |
457
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655 bool refoutlazy = vd->storage_class & (STCref | STCout | STClazy); |
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656 |
486
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657 if (refoutlazy) |
449
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658 { |
244
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659 continue; |
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660 } |
254
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661 else if (DtoIsPassedByRef(vd->type)) |
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662 { |
468
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663 LLValue* vdirval = irloc->value; |
455
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664 if (global.params.symdebug && !(isaArgument(vdirval) && !isaArgument(vdirval)->hasByValAttr())) |
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665 DtoDwarfLocalVariable(vdirval, vd); |
254
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666 continue; |
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667 } |
100 | 668 |
468
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669 LLValue* a = irloc->value; |
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670 LLValue* v = DtoAlloca(a->getType(), "."+a->getName()); |
468
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671 DtoStore(a,v); |
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672 irloc->value = v; |
100 | 673 } |
674 } | |
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675 |
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676 // need result variable? (nested) |
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677 if (fd->vresult && fd->vresult->nestedref) { |
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678 Logger::println("nested vresult value: %s", fd->vresult->toChars()); |
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679 fd->nestedVars.insert(fd->vresult); |
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680 } |
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681 |
486
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682 // construct nested variables array |
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683 if (!fd->nestedVars.empty()) |
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684 { |
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685 Logger::println("has nested frame"); |
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686 // start with add all enclosing parent frames |
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687 int nparelems = 0; |
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688 Dsymbol* par = fd->toParent2(); |
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689 while (par) |
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690 { |
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691 if (FuncDeclaration* parfd = par->isFuncDeclaration()) |
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692 { |
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693 nparelems += parfd->nestedVars.size(); |
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694 } |
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695 else if (ClassDeclaration* parcd = par->isClassDeclaration()) |
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696 { |
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697 // nothing needed |
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698 } |
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699 else |
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700 { |
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701 break; |
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702 } |
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703 par = par->toParent2(); |
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704 } |
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705 int nelems = fd->nestedVars.size() + nparelems; |
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706 |
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707 // make array type for nested vars |
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708 const LLType* nestedVarsTy = LLArrayType::get(getVoidPtrType(), nelems); |
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709 |
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710 // alloca it |
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711 LLValue* nestedVars = DtoAlloca(nestedVarsTy, ".nested_vars"); |
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712 |
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713 // copy parent frame into beginning |
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714 if (nparelems) |
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715 { |
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716 LLValue* src = irfunction->nestArg; |
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717 if (!src) |
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718 { |
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719 assert(irfunction->thisArg); |
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720 assert(fd->isMember2()); |
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721 LLValue* thisval = DtoLoad(irfunction->thisArg); |
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722 ClassDeclaration* cd = fd->isMember2()->isClassDeclaration(); |
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723 assert(cd); |
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724 assert(cd->vthis); |
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725 src = DtoLoad(DtoGEPi(thisval, 0,2+cd->vthis->ir.irField->index, ".vthis")); |
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726 } |
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727 DtoMemCpy(nestedVars, src, DtoConstSize_t(nparelems*PTRSIZE)); |
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728 } |
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729 |
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730 // store in IrFunction |
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731 irfunction->nestedVar = nestedVars; |
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732 |
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733 // go through all nested vars and assign indices |
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734 int idx = nparelems; |
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735 for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i) |
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736 { |
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737 VarDeclaration* vd = *i; |
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738 if (!vd->ir.irLocal) |
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739 vd->ir.irLocal = new IrLocal(vd); |
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740 |
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741 if (vd->isParameter()) |
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742 { |
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743 Logger::println("nested param: %s", vd->toChars()); |
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744 LLValue* gep = DtoGEPi(nestedVars, 0, idx); |
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745 LLValue* val = DtoBitCast(vd->ir.irLocal->value, getVoidPtrType()); |
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746 DtoStore(val, gep); |
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747 } |
486
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748 else |
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749 { |
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750 Logger::println("nested var: %s", vd->toChars()); |
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751 } |
486
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752 |
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753 vd->ir.irLocal->nestedIndex = idx++; |
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754 } |
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755 |
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756 // fixup nested result variable |
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757 if (fd->vresult && fd->vresult->nestedref) { |
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758 Logger::println("nested vresult value: %s", fd->vresult->toChars()); |
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759 LLValue* gep = DtoGEPi(nestedVars, 0, fd->vresult->ir.irLocal->nestedIndex); |
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760 LLValue* val = DtoBitCast(fd->vresult->ir.irLocal->value, getVoidPtrType()); |
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761 DtoStore(val, gep); |
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762 } |
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763 } |
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764 |
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765 // copy _argptr and _arguments to a memory location |
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766 if (f->linkage == LINKd && f->varargs == 1) |
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767 { |
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768 // _argptr |
486
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769 LLValue* argptrmem = DtoAlloca(fd->ir.irFunc->_argptr->getType(), "_argptr_mem"); |
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770 new llvm::StoreInst(fd->ir.irFunc->_argptr, argptrmem, gIR->scopebb()); |
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771 fd->ir.irFunc->_argptr = argptrmem; |
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772 |
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773 // _arguments |
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774 LLValue* argumentsmem = DtoAlloca(fd->ir.irFunc->_arguments->getType(), "_arguments_mem"); |
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775 new llvm::StoreInst(fd->ir.irFunc->_arguments, argumentsmem, gIR->scopebb()); |
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776 fd->ir.irFunc->_arguments = argumentsmem; |
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777 } |
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778 |
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779 // output function body |
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780 fd->fbody->toIR(gIR); |
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781 |
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782 // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement |
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783 // in automatically, so we do it here. |
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784 if (!gIR->scopereturned()) { |
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785 // pass the previous block into this block |
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786 if (global.params.symdebug) DtoDwarfFuncEnd(fd); |
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787 if (func->getReturnType() == LLType::VoidTy) { |
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788 llvm::ReturnInst::Create(gIR->scopebb()); |
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789 } |
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790 else { |
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791 if (!fd->isMain()) |
244
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792 llvm::ReturnInst::Create(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb()); |
428
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793 else |
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794 llvm::ReturnInst::Create(llvm::Constant::getNullValue(func->getReturnType()), gIR->scopebb()); |
244
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795 } |
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796 } |
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797 |
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798 // erase alloca point |
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799 allocaPoint->eraseFromParent(); |
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800 allocaPoint = 0; |
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801 gIR->func()->allocapoint = 0; |
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802 |
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803 gIR->scopes.pop_back(); |
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804 |
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805 // get rid of the endentry block, it's never used |
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806 assert(!func->getBasicBlockList().empty()); |
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807 func->getBasicBlockList().pop_back(); |
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808 |
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809 // if the last block is empty now, it must be unreachable or it's a bug somewhere else |
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810 // would be nice to figure out how to assert that this is correct |
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811 llvm::BasicBlock* lastbb = &func->getBasicBlockList().back(); |
328
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812 if (lastbb->empty()) |
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813 { |
262
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814 new llvm::UnreachableInst(lastbb); |
244
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815 } |
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816 |
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817 // if the last block is not terminated we return a null value or void |
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818 // for some unknown reason this is needed when a void main() has a inline asm block ... |
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819 // this should be harmless for well formed code! |
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820 lastbb = &func->getBasicBlockList().back(); |
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821 if (!lastbb->getTerminator()) |
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822 { |
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823 Logger::println("adding missing return statement"); |
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824 if (func->getReturnType() == LLType::VoidTy) |
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825 llvm::ReturnInst::Create(lastbb); |
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826 else |
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827 llvm::ReturnInst::Create(llvm::Constant::getNullValue(func->getReturnType()), lastbb); |
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828 } |
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829 |
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830 gIR->functions.pop_back(); |
100 | 831 } |
832 | |
833 ////////////////////////////////////////////////////////////////////////////////////////// | |
834 | |
117 | 835 const llvm::FunctionType* DtoBaseFunctionType(FuncDeclaration* fdecl) |
836 { | |
837 Dsymbol* parent = fdecl->toParent(); | |
838 ClassDeclaration* cd = parent->isClassDeclaration(); | |
839 assert(cd); | |
840 | |
841 FuncDeclaration* f = fdecl; | |
842 | |
843 while (cd) | |
844 { | |
845 ClassDeclaration* base = cd->baseClass; | |
846 if (!base) | |
847 break; | |
848 FuncDeclaration* f2 = base->findFunc(fdecl->ident, (TypeFunction*)fdecl->type); | |
849 if (f2) { | |
850 f = f2; | |
851 cd = base; | |
852 } | |
853 else | |
854 break; | |
855 } | |
856 | |
857 DtoResolveDsymbol(f); | |
858 return llvm::cast<llvm::FunctionType>(DtoType(f->type)); | |
859 } | |
860 | |
861 ////////////////////////////////////////////////////////////////////////////////////////// | |
131 | 862 |
863 DValue* DtoArgument(Argument* fnarg, Expression* argexp) | |
864 { | |
865 Logger::println("DtoArgument"); | |
866 LOG_SCOPE; | |
867 | |
868 DValue* arg = argexp->toElem(gIR); | |
869 | |
870 // ref/out arg | |
871 if (fnarg && ((fnarg->storageClass & STCref) || (fnarg->storageClass & STCout))) | |
872 { | |
873 if (arg->isVar() || arg->isLRValue()) | |
486
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874 arg = new DImValue(argexp->type, arg->getLVal()); |
131 | 875 else |
486
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876 arg = new DImValue(argexp->type, arg->getRVal()); |
131 | 877 } |
217
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878 // byval arg, but expr has no storage yet |
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879 else if (DtoIsPassedByRef(argexp->type) && (arg->isSlice() || arg->isNull())) |
131 | 880 { |
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881 LLValue* alloc = DtoAlloca(DtoType(argexp->type), ".tmp_arg"); |
585
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882 DVarValue* vv = new DVarValue(argexp->type, alloc); |
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883 DtoAssign(argexp->loc, vv, arg); |
131 | 884 arg = vv; |
885 } | |
886 | |
887 return arg; | |
888 } | |
889 | |
890 ////////////////////////////////////////////////////////////////////////////////////////// | |
891 | |
213
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892 void DtoVariadicArgument(Expression* argexp, LLValue* dst) |
131 | 893 { |
894 Logger::println("DtoVariadicArgument"); | |
895 LOG_SCOPE; | |
585
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896 DVarValue vv(argexp->type, dst); |
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897 DtoAssign(argexp->loc, &vv, argexp->toElem(gIR)); |
131 | 898 } |
899 | |
900 ////////////////////////////////////////////////////////////////////////////////////////// | |
445
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901 |
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902 bool FuncDeclaration::isIntrinsic() |
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903 { |
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904 return (llvmInternal == LLVMintrinsic || isVaIntrinsic()); |
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905 } |
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906 |
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907 bool FuncDeclaration::isVaIntrinsic() |
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908 { |
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909 return (llvmInternal == LLVMva_start || |
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910 llvmInternal == LLVMva_copy || |
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911 llvmInternal == LLVMva_end); |
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912 } |