Mercurial > projects > ldc
annotate gen/functions.cpp @ 217:0806379a5eca trunk
[svn r233] Added: -oq command line option for writing fully qualified object names.
Added: started support for x86 80bit floating point.
Changed: aggregates passed by value now use the llvm 'byval' parameter attribute, also lays ground work for
using other attributes.
Changed: eliminated a lot more std::vectorS, these showed up pretty much at the top when profiling!
Changed: performed other misc. cleanups.
Changed: halt expression now call the new llvm trap intrinsic instead of an assert(0).
Changed: dstress suite now passes -O0 by default, this only eliminates unreferenced globals, which speeds up
linking quite a bit.
| author | lindquist |
|---|---|
| date | Thu, 05 Jun 2008 06:38:36 +0200 |
| parents | a58d8f4b84df |
| children | 74701ba40398 |
| rev | line source |
|---|---|
| 100 | 1 #include "gen/llvm.h" |
| 2 | |
| 3 #include "mtype.h" | |
| 4 #include "aggregate.h" | |
| 5 #include "init.h" | |
| 6 #include "declaration.h" | |
| 7 #include "template.h" | |
| 8 #include "module.h" | |
| 9 #include "statement.h" | |
| 10 | |
| 11 #include "gen/irstate.h" | |
| 12 #include "gen/tollvm.h" | |
| 13 #include "gen/runtime.h" | |
| 14 #include "gen/arrays.h" | |
| 15 #include "gen/logger.h" | |
| 16 #include "gen/functions.h" | |
| 17 #include "gen/todebug.h" | |
| 18 #include "gen/classes.h" | |
| 131 | 19 #include "gen/dvalue.h" |
| 100 | 20 |
|
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21 const llvm::FunctionType* DtoFunctionType(Type* type, const LLType* thistype, bool ismain) |
| 100 | 22 { |
| 23 TypeFunction* f = (TypeFunction*)type; | |
| 24 assert(f != 0); | |
| 25 | |
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26 if (type->ir.type != NULL) { |
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27 return llvm::cast<llvm::FunctionType>(type->ir.type->get()); |
| 100 | 28 } |
| 29 | |
| 30 bool typesafeVararg = false; | |
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31 bool arrayVararg = false; |
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32 if (f->linkage == LINKd) |
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33 { |
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34 if (f->varargs == 1) |
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35 typesafeVararg = true; |
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36 else if (f->varargs == 2) |
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37 arrayVararg = true; |
| 100 | 38 } |
| 39 | |
| 40 // return value type | |
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41 const LLType* rettype; |
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42 const LLType* actualRettype; |
| 100 | 43 Type* rt = f->next; |
| 44 bool retinptr = false; | |
| 45 bool usesthis = false; | |
| 46 | |
| 47 if (ismain) { | |
| 48 rettype = llvm::Type::Int32Ty; | |
| 49 actualRettype = rettype; | |
| 50 } | |
| 51 else { | |
| 52 assert(rt); | |
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53 Type* rtfin = DtoDType(rt); |
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54 if (DtoIsReturnedInArg(rt)) { |
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55 rettype = getPtrToType(DtoType(rt)); |
| 100 | 56 actualRettype = llvm::Type::VoidTy; |
| 57 f->llvmRetInPtr = retinptr = true; | |
| 58 } | |
| 59 else { | |
| 60 rettype = DtoType(rt); | |
| 61 actualRettype = rettype; | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 // parameter types | |
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66 std::vector<const LLType*> paramvec; |
| 100 | 67 |
| 68 if (retinptr) { | |
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69 //Logger::cout() << "returning through pointer parameter: " << *rettype << '\n'; |
| 100 | 70 paramvec.push_back(rettype); |
| 71 } | |
| 72 | |
| 73 if (thistype) { | |
| 74 paramvec.push_back(thistype); | |
| 75 usesthis = true; | |
| 76 } | |
| 77 | |
| 78 if (typesafeVararg) { | |
| 79 ClassDeclaration* ti = Type::typeinfo; | |
| 80 ti->toObjFile(); | |
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81 DtoForceConstInitDsymbol(ti); |
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82 assert(ti->ir.irStruct->constInit); |
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83 std::vector<const LLType*> types; |
| 100 | 84 types.push_back(DtoSize_t()); |
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85 types.push_back(getPtrToType(getPtrToType(ti->ir.irStruct->constInit->getType()))); |
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86 const LLType* t1 = llvm::StructType::get(types); |
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87 paramvec.push_back(getPtrToType(t1)); |
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88 paramvec.push_back(getPtrToType(llvm::Type::Int8Ty)); |
| 100 | 89 } |
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90 else if (arrayVararg) |
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91 { |
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92 // do nothing? |
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93 } |
| 100 | 94 |
| 95 size_t n = Argument::dim(f->parameters); | |
| 96 | |
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97 int nbyval = 0; |
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98 |
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99 llvm::PAListPtr palist; |
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100 |
| 100 | 101 for (int i=0; i < n; ++i) { |
| 102 Argument* arg = Argument::getNth(f->parameters, i); | |
| 103 // ensure scalar | |
| 104 Type* argT = DtoDType(arg->type); | |
| 105 assert(argT); | |
| 106 | |
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107 bool refOrOut = ((arg->storageClass & STCref) || (arg->storageClass & STCout)); |
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108 |
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109 const LLType* at = DtoType(argT); |
| 100 | 110 if (isaStruct(at)) { |
| 111 Logger::println("struct param"); | |
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112 paramvec.push_back(getPtrToType(at)); |
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113 arg->llvmByVal = !refOrOut; |
| 100 | 114 } |
| 115 else if (isaArray(at)) { | |
| 116 Logger::println("sarray param"); | |
| 117 assert(argT->ty == Tsarray); | |
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118 //paramvec.push_back(getPtrToType(at->getContainedType(0))); |
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119 paramvec.push_back(getPtrToType(at)); |
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120 arg->llvmByVal = !refOrOut; |
| 100 | 121 } |
| 122 else if (llvm::isa<llvm::OpaqueType>(at)) { | |
| 123 Logger::println("opaque param"); | |
| 124 assert(argT->ty == Tstruct || argT->ty == Tclass); | |
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125 paramvec.push_back(getPtrToType(at)); |
| 100 | 126 } |
| 127 else { | |
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128 if (refOrOut) { |
| 131 | 129 Logger::println("by ref param"); |
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130 at = getPtrToType(at); |
| 100 | 131 } |
| 132 else { | |
| 133 Logger::println("in param"); | |
| 134 } | |
| 135 paramvec.push_back(at); | |
| 136 } | |
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137 |
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138 if (arg->llvmByVal) |
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139 nbyval++; |
| 100 | 140 } |
| 141 | |
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142 //warning("set %d byval args for type: %s", nbyval, f->toChars()); |
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143 |
| 100 | 144 // construct function type |
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145 bool isvararg = !(typesafeVararg || arrayVararg) && f->varargs; |
| 100 | 146 llvm::FunctionType* functype = llvm::FunctionType::get(actualRettype, paramvec, isvararg); |
| 147 | |
| 148 f->llvmRetInPtr = retinptr; | |
| 149 f->llvmUsesThis = usesthis; | |
| 150 | |
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151 f->ir.type = new llvm::PATypeHolder(functype); |
| 100 | 152 |
| 153 return functype; | |
| 154 } | |
| 155 | |
| 156 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 157 | |
| 158 static const llvm::FunctionType* DtoVaFunctionType(FuncDeclaration* fdecl) | |
| 159 { | |
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160 // type has already been resolved |
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161 if (fdecl->type->ir.type != 0) { |
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162 return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); |
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163 } |
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164 |
| 100 | 165 TypeFunction* f = (TypeFunction*)fdecl->type; |
| 166 assert(f != 0); | |
| 167 | |
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168 const llvm::PointerType* i8pty = getPtrToType(llvm::Type::Int8Ty); |
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169 std::vector<const LLType*> args; |
| 100 | 170 |
| 171 if (fdecl->llvmInternal == LLVMva_start) { | |
| 172 args.push_back(i8pty); | |
| 173 } | |
| 174 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
| 175 size_t n = Argument::dim(f->parameters); | |
| 176 for (size_t i=0; i<n; ++i) { | |
| 177 args.push_back(i8pty); | |
| 178 } | |
| 179 } | |
| 180 else | |
| 181 assert(0); | |
| 182 | |
| 183 const llvm::FunctionType* fty = llvm::FunctionType::get(llvm::Type::VoidTy, args, false); | |
| 184 | |
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185 f->ir.type = new llvm::PATypeHolder(fty); |
| 100 | 186 |
| 187 return fty; | |
| 188 } | |
| 189 | |
| 190 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 191 | |
| 192 const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl) | |
| 193 { | |
| 194 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
| 195 return DtoVaFunctionType(fdecl); | |
| 196 } | |
| 197 | |
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198 // unittest has null type, just build it manually |
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199 /*if (fdecl->isUnitTestDeclaration()) { |
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200 std::vector<const LLType*> args; |
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201 return llvm::FunctionType::get(llvm::Type::VoidTy, args, false); |
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202 }*/ |
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203 |
| 100 | 204 // type has already been resolved |
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205 if (fdecl->type->ir.type != 0) { |
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206 return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); |
| 100 | 207 } |
| 208 | |
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209 const LLType* thisty = NULL; |
| 100 | 210 if (fdecl->needThis()) { |
| 132 | 211 if (AggregateDeclaration* ad = fdecl->isMember2()) { |
| 212 Logger::println("isMember = this is: %s", ad->type->toChars()); | |
| 100 | 213 thisty = DtoType(ad->type); |
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214 //Logger::cout() << "this llvm type: " << *thisty << '\n'; |
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215 if (isaStruct(thisty) || (!gIR->structs.empty() && thisty == gIR->topstruct()->recty.get())) |
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216 thisty = getPtrToType(thisty); |
| 100 | 217 } |
| 132 | 218 else { |
| 219 Logger::println("chars: %s type: %s kind: %s", fdecl->toChars(), fdecl->type->toChars(), fdecl->kind()); | |
| 220 assert(0); | |
| 221 } | |
| 100 | 222 } |
| 223 else if (fdecl->isNested()) { | |
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224 thisty = getPtrToType(llvm::Type::Int8Ty); |
| 100 | 225 } |
| 226 | |
| 227 const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, fdecl->isMain()); | |
| 228 | |
| 229 return functype; | |
| 230 } | |
| 231 | |
| 232 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 233 | |
| 234 static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl) | |
| 235 { | |
| 236 TypeFunction* f = (TypeFunction*)DtoDType(fdecl->type); | |
| 237 const llvm::FunctionType* fty = DtoVaFunctionType(fdecl); | |
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238 LLConstant* fn = 0; |
| 100 | 239 |
| 240 if (fdecl->llvmInternal == LLVMva_start) { | |
| 241 fn = gIR->module->getOrInsertFunction("llvm.va_start", fty); | |
| 242 assert(fn); | |
| 243 } | |
| 244 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
| 245 fn = gIR->module->getOrInsertFunction(fdecl->llvmInternal1, fty); | |
| 246 assert(fn); | |
| 247 } | |
| 248 else | |
| 249 assert(0); | |
| 250 | |
| 251 llvm::Function* func = llvm::dyn_cast<llvm::Function>(fn); | |
| 252 assert(func); | |
| 253 assert(func->isIntrinsic()); | |
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254 fdecl->ir.irFunc->func = func; |
| 100 | 255 return func; |
| 256 } | |
| 257 | |
| 258 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 259 | |
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260 void DtoResolveFunction(FuncDeclaration* fdecl) |
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261 { |
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262 if (!global.params.useUnitTests && fdecl->isUnitTestDeclaration()) { |
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263 return; // ignore declaration completely |
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264 } |
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265 |
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266 // is imported and we don't have access? |
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267 if (fdecl->getModule() != gIR->dmodule) |
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268 { |
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269 if (fdecl->prot() == PROTprivate) |
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270 return; |
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271 } |
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272 |
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273 if (fdecl->ir.resolved) return; |
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274 fdecl->ir.resolved = true; |
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275 |
| 132 | 276 Logger::println("DtoResolveFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
|
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277 LOG_SCOPE; |
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278 |
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279 if (fdecl->runTimeHack) { |
|
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280 gIR->declareList.push_back(fdecl); |
| 127 | 281 TypeFunction* tf = (TypeFunction*)fdecl->type; |
| 282 tf->llvmRetInPtr = DtoIsPassedByRef(tf->next); | |
|
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283 return; |
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284 } |
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285 |
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286 if (fdecl->parent) |
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287 if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance()) |
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288 { |
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289 TemplateDeclaration* tempdecl = tinst->tempdecl; |
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290 if (tempdecl->llvmInternal == LLVMva_arg) |
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291 { |
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292 Logger::println("magic va_arg found"); |
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293 fdecl->llvmInternal = LLVMva_arg; |
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294 fdecl->ir.declared = true; |
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295 fdecl->ir.initialized = true; |
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296 fdecl->ir.defined = true; |
|
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297 return; // this gets mapped to an instruction so a declaration makes no sence |
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298 } |
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299 else if (tempdecl->llvmInternal == LLVMva_start) |
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300 { |
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301 Logger::println("magic va_start found"); |
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302 fdecl->llvmInternal = LLVMva_start; |
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303 } |
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304 } |
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305 |
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306 DtoFunctionType(fdecl); |
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307 |
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308 // queue declaration |
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309 if (!fdecl->isAbstract()) |
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310 gIR->declareList.push_back(fdecl); |
|
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311 } |
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312 |
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313 ////////////////////////////////////////////////////////////////////////////////////////// |
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314 |
| 100 | 315 void DtoDeclareFunction(FuncDeclaration* fdecl) |
| 316 { | |
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317 if (fdecl->ir.declared) return; |
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318 fdecl->ir.declared = true; |
|
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319 |
| 132 | 320 Logger::println("DtoDeclareFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
| 100 | 321 LOG_SCOPE; |
| 322 | |
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323 assert(!fdecl->isAbstract()); |
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324 |
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325 // intrinsic sanity check |
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326 if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) { |
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327 error(fdecl->loc, "intrinsics cannot have function bodies"); |
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328 fatal(); |
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329 } |
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330 |
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331 if (fdecl->runTimeHack) { |
| 100 | 332 Logger::println("runtime hack func chars: %s", fdecl->toChars()); |
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333 if (!fdecl->ir.irFunc) { |
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334 fdecl->ir.irFunc = new IrFunction(fdecl); |
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335 fdecl->ir.irFunc->func = LLVM_D_GetRuntimeFunction(gIR->module, fdecl->toChars()); |
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336 } |
| 100 | 337 return; |
| 338 } | |
| 339 | |
| 340 bool declareOnly = false; | |
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341 bool templInst = fdecl->parent && DtoIsTemplateInstance(fdecl->parent); |
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342 if (!templInst && fdecl->getModule() != gIR->dmodule) |
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343 { |
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344 Logger::println("not template instance, and not in this module. declare only!"); |
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345 Logger::println("current module: %s", gIR->dmodule->ident->toChars()); |
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346 Logger::println("func module: %s", fdecl->getModule()->ident->toChars()); |
|
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347 declareOnly = true; |
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348 } |
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349 else if (fdecl->llvmInternal == LLVMva_start) |
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350 declareOnly = true; |
| 100 | 351 |
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352 if (!fdecl->ir.irFunc) { |
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353 fdecl->ir.irFunc = new IrFunction(fdecl); |
| 100 | 354 } |
| 355 | |
| 356 // mangled name | |
| 357 char* mangled_name; | |
| 358 if (fdecl->llvmInternal == LLVMintrinsic) | |
| 359 mangled_name = fdecl->llvmInternal1; | |
| 360 else | |
| 361 mangled_name = fdecl->mangle(); | |
| 362 | |
| 363 llvm::Function* vafunc = 0; | |
| 364 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
| 365 vafunc = DtoDeclareVaFunction(fdecl); | |
| 366 } | |
| 367 | |
| 368 Type* t = DtoDType(fdecl->type); | |
| 369 TypeFunction* f = (TypeFunction*)t; | |
| 370 | |
| 371 // construct function | |
| 372 const llvm::FunctionType* functype = DtoFunctionType(fdecl); | |
| 373 llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name); | |
| 374 if (!func) | |
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375 func = llvm::Function::Create(functype, DtoLinkage(fdecl), mangled_name, gIR->module); |
| 100 | 376 else |
| 377 assert(func->getFunctionType() == functype); | |
| 378 | |
| 379 // add func to IRFunc | |
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380 fdecl->ir.irFunc->func = func; |
| 100 | 381 |
| 382 // calling convention | |
| 383 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic) | |
| 384 func->setCallingConv(DtoCallingConv(f->linkage)); | |
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385 else // fall back to C, it should be the right thing to do |
| 132 | 386 func->setCallingConv(llvm::CallingConv::C); |
| 387 | |
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388 fdecl->ir.irFunc->func = func; |
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389 assert(llvm::isa<llvm::FunctionType>(f->ir.type->get())); |
| 100 | 390 |
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391 // parameter attributes |
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392 if (f->parameters) |
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393 { |
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394 int llidx = 1; |
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395 if (f->llvmRetInPtr) ++llidx; |
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396 if (f->llvmUsesThis) ++llidx; |
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397 if (f->linkage == LINKd && f->varargs == 1) |
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398 llidx += 2; |
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399 |
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400 int funcNumArgs = func->getArgumentList().size(); |
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401 std::vector<llvm::ParamAttrsWithIndex> attrs; |
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402 int k = 0; |
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403 |
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404 int nbyval = 0; |
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405 |
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406 for (; llidx <= funcNumArgs && f->parameters->dim > k; ++llidx,++k) |
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407 { |
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408 Argument* fnarg = (Argument*)f->parameters->data[k]; |
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409 assert(fnarg); |
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410 if (fnarg->llvmByVal) |
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411 { |
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412 llvm::ParamAttrsWithIndex PAWI; |
|
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413 PAWI.Index = llidx; |
|
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414 PAWI.Attrs = llvm::ParamAttr::ByVal; |
|
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415 attrs.push_back(PAWI); |
|
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416 nbyval++; |
|
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417 } |
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418 } |
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419 |
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420 //warning("set %d byval args for function: %s", nbyval, func->getName().c_str()); |
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421 |
|
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422 if (nbyval) { |
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423 llvm::PAListPtr palist = llvm::PAListPtr::get(attrs.begin(), attrs.end()); |
|
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424 func->setParamAttrs(palist); |
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425 } |
|
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426 } |
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427 |
|
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428 // main |
| 100 | 429 if (fdecl->isMain()) { |
| 430 gIR->mainFunc = func; | |
| 431 } | |
| 432 | |
|
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433 // static ctor |
|
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434 if (fdecl->isStaticCtorDeclaration() && fdecl->getModule() == gIR->dmodule) { |
|
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435 gIR->ctors.push_back(fdecl); |
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436 } |
|
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437 // static dtor |
|
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438 else if (fdecl->isStaticDtorDeclaration() && fdecl->getModule() == gIR->dmodule) { |
|
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439 gIR->dtors.push_back(fdecl); |
|
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440 } |
|
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441 |
|
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442 // we never reference parameters of function prototypes |
|
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443 if (!declareOnly) |
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444 { |
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445 // name parameters |
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446 llvm::Function::arg_iterator iarg = func->arg_begin(); |
|
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447 int k = 0; |
|
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448 if (f->llvmRetInPtr) { |
|
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449 iarg->setName("retval"); |
|
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450 fdecl->ir.irFunc->retArg = iarg; |
|
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451 ++iarg; |
|
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452 } |
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453 if (f->llvmUsesThis) { |
|
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454 iarg->setName("this"); |
|
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455 fdecl->ir.irFunc->thisVar = iarg; |
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456 assert(fdecl->ir.irFunc->thisVar); |
|
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457 ++iarg; |
|
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458 } |
|
119
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459 |
|
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460 if (f->linkage == LINKd && f->varargs == 1) { |
|
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461 iarg->setName("_arguments"); |
|
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462 fdecl->ir.irFunc->_arguments = iarg; |
|
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463 ++iarg; |
|
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464 iarg->setName("_argptr"); |
|
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465 fdecl->ir.irFunc->_argptr = iarg; |
|
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466 ++iarg; |
|
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467 } |
|
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468 |
|
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469 for (; iarg != func->arg_end(); ++iarg) |
|
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470 { |
|
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471 if (fdecl->parameters && fdecl->parameters->dim > k) |
|
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472 { |
|
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473 Dsymbol* argsym = (Dsymbol*)fdecl->parameters->data[k++]; |
|
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474 VarDeclaration* argvd = argsym->isVarDeclaration(); |
|
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475 assert(argvd); |
|
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476 assert(!argvd->ir.irLocal); |
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477 argvd->ir.irLocal = new IrLocal(argvd); |
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478 argvd->ir.irLocal->value = iarg; |
|
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479 iarg->setName(argvd->ident->toChars()); |
| 100 | 480 } |
|
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481 else |
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482 { |
|
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483 iarg->setName("unnamed"); |
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484 } |
| 100 | 485 } |
| 486 } | |
| 487 | |
|
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488 if (fdecl->isUnitTestDeclaration()) |
|
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489 gIR->unitTests.push_back(fdecl); |
|
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490 |
| 100 | 491 if (!declareOnly) |
|
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492 gIR->defineList.push_back(fdecl); |
|
133
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493 else |
|
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494 assert(func->getLinkage() != llvm::GlobalValue::InternalLinkage); |
| 100 | 495 |
| 496 Logger::cout() << "func decl: " << *func << '\n'; | |
| 497 } | |
| 498 | |
| 499 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 500 | |
| 501 void DtoDefineFunc(FuncDeclaration* fd) | |
| 502 { | |
|
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503 if (fd->ir.defined) return; |
|
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504 fd->ir.defined = true; |
|
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505 |
|
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506 assert(fd->ir.declared); |
|
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507 |
| 132 | 508 Logger::println("DtoDefineFunc(%s): %s", fd->toPrettyChars(), fd->loc.toChars()); |
|
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509 LOG_SCOPE; |
|
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510 |
| 100 | 511 // debug info |
| 512 if (global.params.symdebug) { | |
| 513 Module* mo = fd->getModule(); | |
|
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514 fd->ir.irFunc->dwarfSubProg = DtoDwarfSubProgram(fd, DtoDwarfCompileUnit(mo)); |
| 100 | 515 } |
| 516 | |
| 517 Type* t = DtoDType(fd->type); | |
| 518 TypeFunction* f = (TypeFunction*)t; | |
|
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519 assert(f->ir.type); |
| 100 | 520 |
|
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521 llvm::Function* func = fd->ir.irFunc->func; |
| 100 | 522 const llvm::FunctionType* functype = func->getFunctionType(); |
| 523 | |
| 524 // only members of the current module or template instances maybe be defined | |
| 525 if (fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent)) | |
| 526 { | |
|
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527 fd->ir.DModule = gIR->dmodule; |
| 100 | 528 |
| 529 // function definition | |
| 530 if (fd->fbody != 0) | |
| 531 { | |
| 532 Logger::println("Doing function body for: %s", fd->toChars()); | |
|
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533 assert(fd->ir.irFunc); |
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534 gIR->functions.push_back(fd->ir.irFunc); |
| 100 | 535 |
| 536 if (fd->isMain()) | |
| 537 gIR->emitMain = true; | |
| 538 | |
|
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539 std::string entryname("entry_"); |
|
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540 entryname.append(fd->toPrettyChars()); |
|
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541 |
|
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542 llvm::BasicBlock* beginbb = llvm::BasicBlock::Create(entryname,func); |
|
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543 llvm::BasicBlock* endbb = llvm::BasicBlock::Create("endentry",func); |
| 100 | 544 |
| 545 //assert(gIR->scopes.empty()); | |
| 546 gIR->scopes.push_back(IRScope(beginbb, endbb)); | |
| 547 | |
| 548 // create alloca point | |
|
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549 llvm::Instruction* allocaPoint = new llvm::AllocaInst(llvm::Type::Int32Ty, "alloca point", beginbb); |
|
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550 gIR->func()->allocapoint = allocaPoint; |
| 100 | 551 |
|
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552 // need result variable? (not nested) |
|
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553 if (fd->vresult && !fd->vresult->nestedref) { |
|
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554 Logger::println("non-nested vresult value"); |
|
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555 fd->vresult->ir.irLocal = new IrLocal(fd->vresult); |
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556 fd->vresult->ir.irLocal->value = new llvm::AllocaInst(DtoType(fd->vresult->type),"function_vresult",allocaPoint); |
|
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557 } |
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558 |
| 100 | 559 // give arguments storage |
|
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560 if (fd->parameters) |
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561 { |
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562 size_t n = fd->parameters->dim; |
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563 for (int i=0; i < n; ++i) |
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564 { |
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565 Dsymbol* argsym = (Dsymbol*)fd->parameters->data[i]; |
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566 VarDeclaration* vd = argsym->isVarDeclaration(); |
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567 assert(vd); |
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568 |
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569 if (!vd->needsStorage || vd->nestedref || vd->isRef() || vd->isOut() || DtoIsPassedByRef(vd->type)) |
| 100 | 570 continue; |
|
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571 |
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572 LLValue* a = vd->ir.irLocal->value; |
| 100 | 573 assert(a); |
| 574 std::string s(a->getName()); | |
| 575 Logger::println("giving argument '%s' storage", s.c_str()); | |
| 576 s.append("_storage"); | |
|
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577 |
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578 LLValue* v = new llvm::AllocaInst(a->getType(),s,allocaPoint); |
| 100 | 579 gIR->ir->CreateStore(a,v); |
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580 vd->ir.irLocal->value = v; |
| 100 | 581 } |
| 582 } | |
| 583 | |
| 584 // debug info | |
| 585 if (global.params.symdebug) DtoDwarfFuncStart(fd); | |
| 586 | |
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587 LLValue* parentNested = NULL; |
| 131 | 588 if (FuncDeclaration* fd2 = fd->toParent2()->isFuncDeclaration()) { |
| 589 if (!fd->isStatic()) // huh? | |
|
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590 parentNested = fd2->ir.irFunc->nestedVar; |
|
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591 } |
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592 |
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593 // need result variable? (nested) |
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594 if (fd->vresult && fd->vresult->nestedref) { |
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595 Logger::println("nested vresult value: %s", fd->vresult->toChars()); |
|
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596 fd->nestedVars.insert(fd->vresult); |
| 100 | 597 } |
| 598 | |
| 599 // construct nested variables struct | |
|
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600 if (!fd->nestedVars.empty() || parentNested) { |
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601 std::vector<const LLType*> nestTypes; |
| 100 | 602 int j = 0; |
| 603 if (parentNested) { | |
| 604 nestTypes.push_back(parentNested->getType()); | |
| 605 j++; | |
| 606 } | |
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607 for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i) { |
| 100 | 608 VarDeclaration* vd = *i; |
|
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609 Logger::println("referenced nested variable %s", vd->toChars()); |
|
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610 if (!vd->ir.irLocal) |
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611 vd->ir.irLocal = new IrLocal(vd); |
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612 vd->ir.irLocal->nestedIndex = j++; |
| 100 | 613 if (vd->isParameter()) { |
|
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614 if (!vd->ir.irLocal->value) { |
|
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615 assert(vd == fd->vthis); |
|
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616 vd->ir.irLocal->value = fd->ir.irFunc->thisVar; |
|
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617 } |
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618 assert(vd->ir.irLocal->value); |
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619 nestTypes.push_back(vd->ir.irLocal->value->getType()); |
| 100 | 620 } |
| 621 else { | |
| 622 nestTypes.push_back(DtoType(vd->type)); | |
| 623 } | |
| 624 } | |
| 625 const llvm::StructType* nestSType = llvm::StructType::get(nestTypes); | |
|
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626 Logger::cout() << "nested var struct has type:" << *nestSType << '\n'; |
|
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627 fd->ir.irFunc->nestedVar = new llvm::AllocaInst(nestSType,"nestedvars",allocaPoint); |
| 100 | 628 if (parentNested) { |
|
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629 assert(fd->ir.irFunc->thisVar); |
|
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630 LLValue* ptr = gIR->ir->CreateBitCast(fd->ir.irFunc->thisVar, parentNested->getType(), "tmp"); |
|
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631 gIR->ir->CreateStore(ptr, DtoGEPi(fd->ir.irFunc->nestedVar, 0,0, "tmp")); |
| 100 | 632 } |
|
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633 for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i) { |
| 100 | 634 VarDeclaration* vd = *i; |
| 635 if (vd->isParameter()) { | |
|
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636 assert(vd->ir.irLocal); |
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637 gIR->ir->CreateStore(vd->ir.irLocal->value, DtoGEPi(fd->ir.irFunc->nestedVar, 0, vd->ir.irLocal->nestedIndex, "tmp")); |
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638 vd->ir.irLocal->value = fd->ir.irFunc->nestedVar; |
| 100 | 639 } |
| 640 } | |
| 641 } | |
| 642 | |
| 643 // copy _argptr to a memory location | |
| 644 if (f->linkage == LINKd && f->varargs == 1) | |
| 645 { | |
|
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646 LLValue* argptrmem = new llvm::AllocaInst(fd->ir.irFunc->_argptr->getType(), "_argptrmem", gIR->topallocapoint()); |
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647 new llvm::StoreInst(fd->ir.irFunc->_argptr, argptrmem, gIR->scopebb()); |
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648 fd->ir.irFunc->_argptr = argptrmem; |
| 100 | 649 } |
| 650 | |
| 651 // output function body | |
| 652 fd->fbody->toIR(gIR); | |
| 653 | |
| 654 // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement | |
| 655 // in automatically, so we do it here. | |
| 656 if (!fd->isMain()) { | |
| 657 if (!gIR->scopereturned()) { | |
| 658 // pass the previous block into this block | |
| 659 if (global.params.symdebug) DtoDwarfFuncEnd(fd); | |
| 660 if (func->getReturnType() == llvm::Type::VoidTy) { | |
|
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661 llvm::ReturnInst::Create(gIR->scopebb()); |
| 100 | 662 } |
| 663 else { | |
|
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664 llvm::ReturnInst::Create(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb()); |
| 100 | 665 } |
| 666 } | |
| 667 } | |
| 668 | |
| 669 // erase alloca point | |
|
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670 allocaPoint->eraseFromParent(); |
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671 allocaPoint = 0; |
| 100 | 672 gIR->func()->allocapoint = 0; |
| 673 | |
| 674 gIR->scopes.pop_back(); | |
| 675 | |
| 676 // get rid of the endentry block, it's never used | |
| 677 assert(!func->getBasicBlockList().empty()); | |
| 678 func->getBasicBlockList().pop_back(); | |
| 679 | |
| 680 // if the last block is empty now, it must be unreachable or it's a bug somewhere else | |
| 681 // would be nice to figure out how to assert that this is correct | |
| 682 llvm::BasicBlock* lastbb = &func->getBasicBlockList().back(); | |
| 683 if (lastbb->empty()) { | |
| 684 if (lastbb->getNumUses() == 0) | |
| 685 lastbb->eraseFromParent(); | |
| 686 else { | |
| 687 new llvm::UnreachableInst(lastbb); | |
| 688 /*if (func->getReturnType() == llvm::Type::VoidTy) { | |
|
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689 llvm::ReturnInst::Create(lastbb); |
| 100 | 690 } |
| 691 else { | |
|
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692 llvm::ReturnInst::Create(llvm::UndefValue::get(func->getReturnType()), lastbb); |
| 100 | 693 }*/ |
| 694 } | |
| 695 } | |
| 696 | |
| 697 gIR->functions.pop_back(); | |
| 698 } | |
| 699 } | |
| 700 } | |
| 701 | |
| 702 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 703 | |
| 704 void DtoMain() | |
| 705 { | |
| 706 // emit main function llvm style | |
| 707 // int main(int argc, char**argv, char**env); | |
| 708 | |
| 709 assert(gIR != 0); | |
| 710 IRState& ir = *gIR; | |
| 711 | |
| 712 assert(ir.emitMain && ir.mainFunc); | |
| 713 | |
| 714 // parameter types | |
|
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715 std::vector<const LLType*> pvec; |
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716 pvec.push_back((const LLType*)llvm::Type::Int32Ty); |
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717 const LLType* chPtrType = (const LLType*)getPtrToType(llvm::Type::Int8Ty); |
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718 pvec.push_back((const LLType*)getPtrToType(chPtrType)); |
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719 pvec.push_back((const LLType*)getPtrToType(chPtrType)); |
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720 const LLType* rettype = (const LLType*)llvm::Type::Int32Ty; |
| 100 | 721 |
| 722 llvm::FunctionType* functype = llvm::FunctionType::get(rettype, pvec, false); | |
|
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723 llvm::Function* func = llvm::Function::Create(functype,llvm::GlobalValue::ExternalLinkage,"main",ir.module); |
| 100 | 724 |
|
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725 llvm::BasicBlock* bb = llvm::BasicBlock::Create("entry",func); |
| 100 | 726 |
| 727 // call static ctors | |
| 117 | 728 llvm::Function* fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleCtor"); |
|
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729 llvm::Instruction* apt = llvm::CallInst::Create(fn,"",bb); |
| 100 | 730 |
|
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731 // run unit tests if -unittest is provided |
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732 if (global.params.useUnitTests) { |
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733 fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleUnitTests"); |
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734 llvm::Instruction* apt = llvm::CallInst::Create(fn,"",bb); |
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735 } |
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736 |
| 100 | 737 // call user main function |
| 738 const llvm::FunctionType* mainty = ir.mainFunc->getFunctionType(); | |
| 739 llvm::CallInst* call; | |
| 740 if (mainty->getNumParams() > 0) | |
| 741 { | |
| 742 // main with arguments | |
| 743 assert(mainty->getNumParams() == 1); | |
|
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744 std::vector<LLValue*> args; |
| 100 | 745 llvm::Function* mfn = LLVM_D_GetRuntimeFunction(ir.module,"_d_main_args"); |
| 746 | |
| 747 llvm::Function::arg_iterator argi = func->arg_begin(); | |
| 748 args.push_back(argi++); | |
| 749 args.push_back(argi++); | |
| 750 | |
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751 const LLType* at = mainty->getParamType(0)->getContainedType(0); |
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752 LLValue* arr = new llvm::AllocaInst(at->getContainedType(1)->getContainedType(0), func->arg_begin(), "argstorage", apt); |
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753 LLValue* a = new llvm::AllocaInst(at, "argarray", apt); |
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754 LLValue* ptr = DtoGEPi(a,0,0,"tmp",bb); |
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755 LLValue* v = args[0]; |
| 100 | 756 if (v->getType() != DtoSize_t()) |
| 757 v = new llvm::ZExtInst(v, DtoSize_t(), "tmp", bb); | |
| 758 new llvm::StoreInst(v,ptr,bb); | |
| 759 ptr = DtoGEPi(a,0,1,"tmp",bb); | |
| 760 new llvm::StoreInst(arr,ptr,bb); | |
| 761 args.push_back(a); | |
|
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762 llvm::CallInst::Create(mfn, args.begin(), args.end(), "", bb); |
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763 call = llvm::CallInst::Create(ir.mainFunc,a,"ret",bb); |
| 100 | 764 } |
| 765 else | |
| 766 { | |
| 767 // main with no arguments | |
|
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768 call = llvm::CallInst::Create(ir.mainFunc,"ret",bb); |
| 100 | 769 } |
| 770 call->setCallingConv(ir.mainFunc->getCallingConv()); | |
| 771 | |
| 772 // call static dtors | |
| 117 | 773 fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleDtor"); |
|
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774 llvm::CallInst::Create(fn,"",bb); |
| 100 | 775 |
| 776 // return | |
|
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777 llvm::ReturnInst::Create(call,bb); |
| 100 | 778 } |
| 779 | |
| 780 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 117 | 781 |
| 782 const llvm::FunctionType* DtoBaseFunctionType(FuncDeclaration* fdecl) | |
| 783 { | |
| 784 Dsymbol* parent = fdecl->toParent(); | |
| 785 ClassDeclaration* cd = parent->isClassDeclaration(); | |
| 786 assert(cd); | |
| 787 | |
| 788 FuncDeclaration* f = fdecl; | |
| 789 | |
| 790 while (cd) | |
| 791 { | |
| 792 ClassDeclaration* base = cd->baseClass; | |
| 793 if (!base) | |
| 794 break; | |
| 795 FuncDeclaration* f2 = base->findFunc(fdecl->ident, (TypeFunction*)fdecl->type); | |
| 796 if (f2) { | |
| 797 f = f2; | |
| 798 cd = base; | |
| 799 } | |
| 800 else | |
| 801 break; | |
| 802 } | |
| 803 | |
| 804 DtoResolveDsymbol(f); | |
| 805 return llvm::cast<llvm::FunctionType>(DtoType(f->type)); | |
| 806 } | |
| 807 | |
| 808 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 131 | 809 |
| 810 DValue* DtoArgument(Argument* fnarg, Expression* argexp) | |
| 811 { | |
| 812 Logger::println("DtoArgument"); | |
| 813 LOG_SCOPE; | |
| 814 | |
| 815 DValue* arg = argexp->toElem(gIR); | |
| 816 | |
| 817 // ref/out arg | |
| 818 if (fnarg && ((fnarg->storageClass & STCref) || (fnarg->storageClass & STCout))) | |
| 819 { | |
| 820 if (arg->isVar() || arg->isLRValue()) | |
| 821 arg = new DImValue(argexp->type, arg->getLVal(), false); | |
| 822 else | |
| 823 arg = new DImValue(argexp->type, arg->getRVal(), false); | |
| 824 } | |
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825 // byval arg, but expr has no storage yet |
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826 else if (DtoIsPassedByRef(argexp->type) && (arg->isSlice() || arg->isComplex() || arg->isNull())) |
| 131 | 827 { |
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828 LLValue* alloc = new llvm::AllocaInst(DtoType(argexp->type), "tmpparam", gIR->topallocapoint()); |
| 131 | 829 DVarValue* vv = new DVarValue(argexp->type, alloc, true); |
| 830 DtoAssign(vv, arg); | |
| 831 arg = vv; | |
| 832 } | |
| 833 | |
| 834 return arg; | |
| 835 } | |
| 836 | |
| 837 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 838 | |
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839 void DtoVariadicArgument(Expression* argexp, LLValue* dst) |
| 131 | 840 { |
| 841 Logger::println("DtoVariadicArgument"); | |
| 842 LOG_SCOPE; | |
| 843 DVarValue* vv = new DVarValue(argexp->type, dst, true); | |
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844 gIR->exps.push_back(IRExp(NULL, argexp, vv)); |
| 131 | 845 DtoAssign(vv, argexp->toElem(gIR)); |
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846 gIR->exps.pop_back(); |
| 131 | 847 } |
| 848 | |
| 849 ////////////////////////////////////////////////////////////////////////////////////////// |