Mercurial > projects > ldc
annotate gen/functions.cpp @ 103:855adfdb8d38 trunk
[svn r107] Getting .classinfo on a class instance now works (classinfo is stored in vtable)
| author | lindquist |
|---|---|
| date | Sun, 18 Nov 2007 08:25:07 +0100 |
| parents | 027b8d8b71ec |
| children | 288fe1029e1f |
| 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" | |
| 19 | |
| 20 const llvm::FunctionType* DtoFunctionType(Type* type, const llvm::Type* thistype, bool ismain) | |
| 21 { | |
| 22 TypeFunction* f = (TypeFunction*)type; | |
| 23 assert(f != 0); | |
| 24 | |
| 25 if (type->llvmType != NULL) { | |
| 26 return llvm::cast<llvm::FunctionType>(type->llvmType->get()); | |
| 27 } | |
| 28 | |
| 29 bool typesafeVararg = false; | |
| 30 if (f->linkage == LINKd && f->varargs == 1) { | |
| 31 typesafeVararg = true; | |
| 32 } | |
| 33 | |
| 34 // return value type | |
| 35 const llvm::Type* rettype; | |
| 36 const llvm::Type* actualRettype; | |
| 37 Type* rt = f->next; | |
| 38 bool retinptr = false; | |
| 39 bool usesthis = false; | |
| 40 | |
| 41 if (ismain) { | |
| 42 rettype = llvm::Type::Int32Ty; | |
| 43 actualRettype = rettype; | |
| 44 } | |
| 45 else { | |
| 46 assert(rt); | |
| 47 if (DtoIsPassedByRef(rt)) { | |
| 48 rettype = llvm::PointerType::get(DtoType(rt)); | |
| 49 actualRettype = llvm::Type::VoidTy; | |
| 50 f->llvmRetInPtr = retinptr = true; | |
| 51 } | |
| 52 else { | |
| 53 rettype = DtoType(rt); | |
| 54 actualRettype = rettype; | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 // parameter types | |
| 59 std::vector<const llvm::Type*> paramvec; | |
| 60 | |
| 61 if (retinptr) { | |
| 62 Logger::cout() << "returning through pointer parameter: " << *rettype << '\n'; | |
| 63 paramvec.push_back(rettype); | |
| 64 } | |
| 65 | |
| 66 if (thistype) { | |
| 67 paramvec.push_back(thistype); | |
| 68 usesthis = true; | |
| 69 } | |
| 70 | |
| 71 if (typesafeVararg) { | |
| 72 ClassDeclaration* ti = Type::typeinfo; | |
| 73 ti->toObjFile(); | |
|
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74 DtoForceConstInitDsymbol(ti); |
| 100 | 75 assert(ti->llvmInitZ); |
| 76 std::vector<const llvm::Type*> types; | |
| 77 types.push_back(DtoSize_t()); | |
| 78 types.push_back(llvm::PointerType::get(llvm::PointerType::get(ti->llvmInitZ->getType()))); | |
| 79 const llvm::Type* t1 = llvm::StructType::get(types); | |
| 80 paramvec.push_back(llvm::PointerType::get(t1)); | |
| 81 paramvec.push_back(llvm::PointerType::get(llvm::Type::Int8Ty)); | |
| 82 } | |
| 83 | |
| 84 size_t n = Argument::dim(f->parameters); | |
| 85 | |
| 86 for (int i=0; i < n; ++i) { | |
| 87 Argument* arg = Argument::getNth(f->parameters, i); | |
| 88 // ensure scalar | |
| 89 Type* argT = DtoDType(arg->type); | |
| 90 assert(argT); | |
| 91 | |
| 92 if ((arg->storageClass & STCref) || (arg->storageClass & STCout)) { | |
| 93 //assert(arg->vardecl); | |
| 94 //arg->vardecl->refparam = true; | |
| 95 } | |
| 96 else | |
| 97 arg->llvmCopy = true; | |
| 98 | |
| 99 const llvm::Type* at = DtoType(argT); | |
| 100 if (isaStruct(at)) { | |
| 101 Logger::println("struct param"); | |
| 102 paramvec.push_back(llvm::PointerType::get(at)); | |
| 103 } | |
| 104 else if (isaArray(at)) { | |
| 105 Logger::println("sarray param"); | |
| 106 assert(argT->ty == Tsarray); | |
| 107 //paramvec.push_back(llvm::PointerType::get(at->getContainedType(0))); | |
| 108 paramvec.push_back(llvm::PointerType::get(at)); | |
| 109 } | |
| 110 else if (llvm::isa<llvm::OpaqueType>(at)) { | |
| 111 Logger::println("opaque param"); | |
| 112 assert(argT->ty == Tstruct || argT->ty == Tclass); | |
| 113 paramvec.push_back(llvm::PointerType::get(at)); | |
| 114 } | |
| 115 else { | |
| 116 if (!arg->llvmCopy) { | |
| 117 Logger::println("ref param"); | |
| 118 at = llvm::PointerType::get(at); | |
| 119 } | |
| 120 else { | |
| 121 Logger::println("in param"); | |
| 122 } | |
| 123 paramvec.push_back(at); | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 // construct function type | |
| 128 bool isvararg = !typesafeVararg && f->varargs; | |
| 129 llvm::FunctionType* functype = llvm::FunctionType::get(actualRettype, paramvec, isvararg); | |
| 130 | |
| 131 f->llvmRetInPtr = retinptr; | |
| 132 f->llvmUsesThis = usesthis; | |
| 133 | |
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134 //if (!f->llvmType) |
| 100 | 135 f->llvmType = new llvm::PATypeHolder(functype); |
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136 //else |
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137 //assert(functype == f->llvmType->get()); |
| 100 | 138 |
| 139 return functype; | |
| 140 } | |
| 141 | |
| 142 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 143 | |
| 144 static const llvm::FunctionType* DtoVaFunctionType(FuncDeclaration* fdecl) | |
| 145 { | |
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146 // type has already been resolved |
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147 if (fdecl->type->llvmType != 0) { |
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148 return llvm::cast<llvm::FunctionType>(fdecl->type->llvmType->get()); |
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149 } |
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150 |
| 100 | 151 TypeFunction* f = (TypeFunction*)fdecl->type; |
| 152 assert(f != 0); | |
| 153 | |
| 154 const llvm::PointerType* i8pty = llvm::PointerType::get(llvm::Type::Int8Ty); | |
| 155 std::vector<const llvm::Type*> args; | |
| 156 | |
| 157 if (fdecl->llvmInternal == LLVMva_start) { | |
| 158 args.push_back(i8pty); | |
| 159 } | |
| 160 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
| 161 size_t n = Argument::dim(f->parameters); | |
| 162 for (size_t i=0; i<n; ++i) { | |
| 163 args.push_back(i8pty); | |
| 164 } | |
| 165 } | |
| 166 else | |
| 167 assert(0); | |
| 168 | |
| 169 const llvm::FunctionType* fty = llvm::FunctionType::get(llvm::Type::VoidTy, args, false); | |
| 170 | |
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171 f->llvmType = new llvm::PATypeHolder(fty); |
| 100 | 172 |
| 173 return fty; | |
| 174 } | |
| 175 | |
| 176 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 177 | |
| 178 const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl) | |
| 179 { | |
| 180 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
| 181 return DtoVaFunctionType(fdecl); | |
| 182 } | |
| 183 | |
| 184 // type has already been resolved | |
| 185 if (fdecl->type->llvmType != 0) { | |
| 186 return llvm::cast<llvm::FunctionType>(fdecl->type->llvmType->get()); | |
| 187 } | |
| 188 | |
| 189 const llvm::Type* thisty = NULL; | |
| 190 if (fdecl->needThis()) { | |
| 191 if (AggregateDeclaration* ad = fdecl->isMember()) { | |
| 192 Logger::print("isMember = this is: %s\n", ad->type->toChars()); | |
| 193 thisty = DtoType(ad->type); | |
| 194 Logger::cout() << "this llvm type: " << *thisty << '\n'; | |
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195 if (isaStruct(thisty) || (!gIR->structs.empty() && thisty == gIR->topstruct()->recty.get())) |
| 100 | 196 thisty = llvm::PointerType::get(thisty); |
| 197 } | |
| 198 else | |
| 199 assert(0); | |
| 200 } | |
| 201 else if (fdecl->isNested()) { | |
| 202 thisty = llvm::PointerType::get(llvm::Type::Int8Ty); | |
| 203 } | |
| 204 | |
| 205 const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, fdecl->isMain()); | |
| 206 | |
| 207 return functype; | |
| 208 } | |
| 209 | |
| 210 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 211 | |
| 212 static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl) | |
| 213 { | |
| 214 TypeFunction* f = (TypeFunction*)DtoDType(fdecl->type); | |
| 215 const llvm::FunctionType* fty = DtoVaFunctionType(fdecl); | |
| 216 llvm::Constant* fn = 0; | |
| 217 | |
| 218 if (fdecl->llvmInternal == LLVMva_start) { | |
| 219 fn = gIR->module->getOrInsertFunction("llvm.va_start", fty); | |
| 220 assert(fn); | |
| 221 } | |
| 222 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
| 223 fn = gIR->module->getOrInsertFunction(fdecl->llvmInternal1, fty); | |
| 224 assert(fn); | |
| 225 } | |
| 226 else | |
| 227 assert(0); | |
| 228 | |
| 229 llvm::Function* func = llvm::dyn_cast<llvm::Function>(fn); | |
| 230 assert(func); | |
| 231 assert(func->isIntrinsic()); | |
| 232 fdecl->llvmValue = func; | |
| 233 return func; | |
| 234 } | |
| 235 | |
| 236 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 237 | |
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238 void DtoResolveFunction(FuncDeclaration* fdecl) |
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239 { |
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240 if (fdecl->llvmResolved) return; |
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241 fdecl->llvmResolved = true; |
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242 |
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243 Logger::println("DtoResolveFunction(%s)", fdecl->toPrettyChars()); |
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244 LOG_SCOPE; |
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245 |
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246 if (fdecl->llvmRunTimeHack) { |
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247 gIR->declareList.push_back(fdecl); |
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248 return; |
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249 } |
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250 |
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251 if (fdecl->isUnitTestDeclaration()) { |
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252 Logger::attention("ignoring unittest declaration: %s", fdecl->toChars()); |
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253 return; |
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254 } |
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255 |
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256 if (fdecl->parent) |
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257 if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance()) |
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258 { |
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259 TemplateDeclaration* tempdecl = tinst->tempdecl; |
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260 if (tempdecl->llvmInternal == LLVMva_arg) |
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261 { |
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262 Logger::println("magic va_arg found"); |
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263 fdecl->llvmInternal = LLVMva_arg; |
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264 fdecl->llvmDeclared = true; |
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265 fdecl->llvmInitialized = true; |
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266 fdecl->llvmDefined = true; |
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267 return; // this gets mapped to an instruction so a declaration makes no sence |
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268 } |
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269 else if (tempdecl->llvmInternal == LLVMva_start) |
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270 { |
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271 Logger::println("magic va_start found"); |
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272 fdecl->llvmInternal = LLVMva_start; |
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273 } |
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274 } |
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275 |
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276 DtoFunctionType(fdecl); |
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277 |
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278 // queue declaration |
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279 gIR->declareList.push_back(fdecl); |
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280 } |
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281 |
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282 ////////////////////////////////////////////////////////////////////////////////////////// |
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283 |
| 100 | 284 void DtoDeclareFunction(FuncDeclaration* fdecl) |
| 285 { | |
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286 if (fdecl->llvmDeclared) return; |
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287 fdecl->llvmDeclared = true; |
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288 |
| 100 | 289 Logger::println("DtoDeclareFunction(%s)", fdecl->toPrettyChars()); |
| 290 LOG_SCOPE; | |
| 291 | |
| 292 if (fdecl->llvmRunTimeHack) { | |
| 293 Logger::println("runtime hack func chars: %s", fdecl->toChars()); | |
| 294 if (!fdecl->llvmValue) | |
| 295 fdecl->llvmValue = LLVM_D_GetRuntimeFunction(gIR->module, fdecl->toChars()); | |
| 296 return; | |
| 297 } | |
| 298 | |
| 299 bool declareOnly = false; | |
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300 bool templInst = fdecl->parent && DtoIsTemplateInstance(fdecl->parent); |
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301 if (!templInst && fdecl->getModule() != gIR->dmodule) |
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302 declareOnly = true; |
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303 else if (fdecl->llvmInternal == LLVMva_start) |
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304 declareOnly = true; |
| 100 | 305 |
| 306 if (!fdecl->llvmIRFunc) { | |
| 307 fdecl->llvmIRFunc = new IRFunction(fdecl); | |
| 308 } | |
| 309 | |
| 310 // mangled name | |
| 311 char* mangled_name; | |
| 312 if (fdecl->llvmInternal == LLVMintrinsic) | |
| 313 mangled_name = fdecl->llvmInternal1; | |
| 314 else | |
| 315 mangled_name = fdecl->mangle(); | |
| 316 | |
| 317 // unit test special handling | |
| 318 if (fdecl->isUnitTestDeclaration()) | |
| 319 { | |
| 320 assert(0 && "no unittests yet"); | |
| 321 /*const llvm::FunctionType* fnty = llvm::FunctionType::get(llvm::Type::VoidTy, std::vector<const llvm::Type*>(), false); | |
| 322 // make the function | |
| 323 llvm::Function* func = gIR->module->getFunction(mangled_name); | |
| 324 if (func == 0) | |
| 325 func = new llvm::Function(fnty,llvm::GlobalValue::InternalLinkage,mangled_name,gIR->module); | |
| 326 func->setCallingConv(llvm::CallingConv::Fast); | |
| 327 fdecl->llvmValue = func; | |
| 328 return func; | |
| 329 */ | |
| 330 } | |
| 331 | |
| 332 if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) { | |
| 333 error("intrinsics cannot have function bodies"); | |
| 334 fatal(); | |
| 335 } | |
| 336 | |
| 337 llvm::Function* vafunc = 0; | |
| 338 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
| 339 vafunc = DtoDeclareVaFunction(fdecl); | |
| 340 } | |
| 341 | |
| 342 Type* t = DtoDType(fdecl->type); | |
| 343 TypeFunction* f = (TypeFunction*)t; | |
| 344 | |
| 345 // construct function | |
| 346 const llvm::FunctionType* functype = DtoFunctionType(fdecl); | |
| 347 llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name); | |
| 348 if (!func) | |
| 349 func = new llvm::Function(functype, DtoLinkage(fdecl->protection, fdecl->storage_class), mangled_name, gIR->module); | |
| 350 else | |
| 351 assert(func->getFunctionType() == functype); | |
| 352 | |
| 353 // add func to IRFunc | |
| 354 fdecl->llvmIRFunc->func = func; | |
| 355 | |
| 356 // calling convention | |
| 357 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic) | |
| 358 func->setCallingConv(DtoCallingConv(f->linkage)); | |
| 359 | |
| 360 // template instances should have weak linkage | |
| 361 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic && fdecl->parent && DtoIsTemplateInstance(fdecl->parent)) | |
| 362 func->setLinkage(llvm::GlobalValue::WeakLinkage); | |
| 363 | |
| 364 fdecl->llvmValue = func; | |
| 365 assert(llvm::isa<llvm::FunctionType>(f->llvmType->get())); | |
| 366 | |
| 367 if (fdecl->isMain()) { | |
| 368 gIR->mainFunc = func; | |
| 369 } | |
| 370 | |
| 371 // name parameters | |
| 372 llvm::Function::arg_iterator iarg = func->arg_begin(); | |
| 373 int k = 0; | |
| 374 if (f->llvmRetInPtr) { | |
| 375 iarg->setName("retval"); | |
| 376 f->llvmRetArg = iarg; | |
| 377 ++iarg; | |
| 378 } | |
| 379 if (f->llvmUsesThis) { | |
| 380 iarg->setName("this"); | |
| 381 ++iarg; | |
| 382 } | |
| 383 int varargs = -1; | |
| 384 if (f->linkage == LINKd && f->varargs == 1) | |
| 385 varargs = 0; | |
| 386 for (; iarg != func->arg_end(); ++iarg) | |
| 387 { | |
| 388 Argument* arg = Argument::getNth(f->parameters, k++); | |
| 389 //arg->llvmValue = iarg; | |
| 390 //Logger::println("identifier: '%s' %p\n", arg->ident->toChars(), arg->ident); | |
| 391 if (arg && arg->ident != 0) { | |
| 392 if (arg->vardecl) { | |
| 393 arg->vardecl->llvmValue = iarg; | |
| 394 } | |
| 395 iarg->setName(arg->ident->toChars()); | |
| 396 } | |
| 397 else if (!arg && varargs >= 0) { | |
| 398 if (varargs == 0) { | |
| 399 iarg->setName("_arguments"); | |
| 400 fdecl->llvmArguments = iarg; | |
| 401 } | |
| 402 else if (varargs == 1) { | |
| 403 iarg->setName("_argptr"); | |
| 404 fdecl->llvmArgPtr = iarg; | |
| 405 } | |
| 406 else | |
| 407 assert(0); | |
| 408 varargs++; | |
| 409 } | |
| 410 else { | |
| 411 iarg->setName("unnamed"); | |
| 412 } | |
| 413 } | |
| 414 | |
| 415 if (!declareOnly) | |
|
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416 gIR->defineList.push_back(fdecl); |
| 100 | 417 |
| 418 Logger::cout() << "func decl: " << *func << '\n'; | |
| 419 } | |
| 420 | |
| 421 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 422 | |
| 423 // TODO split this monster up | |
| 424 void DtoDefineFunc(FuncDeclaration* fd) | |
| 425 { | |
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426 if (fd->llvmDefined) return; |
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427 fd->llvmDefined = true; |
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428 |
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429 Logger::println("DtoDefineFunc(%s)", fd->toPrettyChars()); |
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430 LOG_SCOPE; |
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431 |
| 100 | 432 // debug info |
| 433 if (global.params.symdebug) { | |
| 434 Module* mo = fd->getModule(); | |
| 435 if (!mo->llvmCompileUnit) { | |
| 436 mo->llvmCompileUnit = DtoDwarfCompileUnit(mo,false); | |
| 437 } | |
| 438 fd->llvmDwarfSubProgram = DtoDwarfSubProgram(fd, mo->llvmCompileUnit); | |
| 439 } | |
| 440 | |
| 441 Type* t = DtoDType(fd->type); | |
| 442 TypeFunction* f = (TypeFunction*)t; | |
| 443 | |
| 444 assert(f->llvmType); | |
| 445 llvm::Function* func = fd->llvmIRFunc->func; | |
| 446 const llvm::FunctionType* functype = func->getFunctionType(); | |
| 447 | |
| 448 // only members of the current module or template instances maybe be defined | |
| 449 if (fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent)) | |
| 450 { | |
| 451 fd->llvmDModule = gIR->dmodule; | |
| 452 | |
| 453 // handle static constructor / destructor | |
| 454 if (fd->isStaticCtorDeclaration() || fd->isStaticDtorDeclaration()) { | |
| 455 const llvm::ArrayType* sctor_type = llvm::ArrayType::get(llvm::PointerType::get(functype),1); | |
| 456 //Logger::cout() << "static ctor type: " << *sctor_type << '\n'; | |
| 457 | |
| 458 llvm::Constant* sctor_func = llvm::cast<llvm::Constant>(fd->llvmValue); | |
| 459 //Logger::cout() << "static ctor func: " << *sctor_func << '\n'; | |
| 460 | |
| 461 llvm::Constant* sctor_init = llvm::ConstantArray::get(sctor_type,&sctor_func,1); | |
| 462 | |
| 463 //Logger::cout() << "static ctor init: " << *sctor_init << '\n'; | |
| 464 | |
| 465 // output the llvm.global_ctors array | |
| 466 const char* varname = fd->isStaticCtorDeclaration() ? "_d_module_ctor_array" : "_d_module_dtor_array"; | |
| 467 llvm::GlobalVariable* sctor_arr = new llvm::GlobalVariable(sctor_type, false, llvm::GlobalValue::AppendingLinkage, sctor_init, varname, gIR->module); | |
| 468 } | |
| 469 | |
| 470 // function definition | |
| 471 if (fd->fbody != 0) | |
| 472 { | |
| 473 Logger::println("Doing function body for: %s", fd->toChars()); | |
| 474 assert(fd->llvmIRFunc); | |
| 475 gIR->functions.push_back(fd->llvmIRFunc); | |
| 476 | |
| 477 // this handling | |
| 478 if (f->llvmUsesThis) { | |
| 479 Logger::println("uses this"); | |
| 480 if (f->llvmRetInPtr) | |
| 481 fd->llvmThisVar = ++func->arg_begin(); | |
| 482 else | |
| 483 fd->llvmThisVar = func->arg_begin(); | |
| 484 assert(fd->llvmThisVar != 0); | |
| 485 } | |
| 486 | |
| 487 if (fd->isMain()) | |
| 488 gIR->emitMain = true; | |
| 489 | |
| 490 llvm::BasicBlock* beginbb = new llvm::BasicBlock("entry",func); | |
| 491 llvm::BasicBlock* endbb = new llvm::BasicBlock("endentry",func); | |
| 492 | |
| 493 //assert(gIR->scopes.empty()); | |
| 494 gIR->scopes.push_back(IRScope(beginbb, endbb)); | |
| 495 | |
| 496 // create alloca point | |
| 497 f->llvmAllocaPoint = new llvm::BitCastInst(llvm::ConstantInt::get(llvm::Type::Int32Ty,0,false),llvm::Type::Int32Ty,"alloca point",gIR->scopebb()); | |
| 498 gIR->func()->allocapoint = f->llvmAllocaPoint; | |
| 499 | |
| 500 // give arguments storage | |
| 501 size_t n = Argument::dim(f->parameters); | |
| 502 for (int i=0; i < n; ++i) { | |
| 503 Argument* arg = Argument::getNth(f->parameters, i); | |
| 504 if (arg && arg->vardecl) { | |
| 505 VarDeclaration* vd = arg->vardecl; | |
| 506 if (!vd->llvmNeedsStorage || vd->nestedref || vd->isRef() || vd->isOut() || DtoIsPassedByRef(vd->type)) | |
| 507 continue; | |
| 508 llvm::Value* a = vd->llvmValue; | |
| 509 assert(a); | |
| 510 std::string s(a->getName()); | |
| 511 Logger::println("giving argument '%s' storage", s.c_str()); | |
| 512 s.append("_storage"); | |
| 513 llvm::Value* v = new llvm::AllocaInst(a->getType(),s,f->llvmAllocaPoint); | |
| 514 gIR->ir->CreateStore(a,v); | |
| 515 vd->llvmValue = v; | |
| 516 } | |
| 517 else { | |
| 518 Logger::attention("some unknown argument: %s", arg ? arg->toChars() : 0); | |
| 519 } | |
| 520 } | |
| 521 | |
| 522 // debug info | |
| 523 if (global.params.symdebug) DtoDwarfFuncStart(fd); | |
| 524 | |
| 525 llvm::Value* parentNested = NULL; | |
| 526 if (FuncDeclaration* fd2 = fd->toParent()->isFuncDeclaration()) { | |
| 527 parentNested = fd2->llvmNested; | |
| 528 } | |
| 529 | |
| 530 // construct nested variables struct | |
| 531 if (!fd->llvmNestedVars.empty() || parentNested) { | |
| 532 std::vector<const llvm::Type*> nestTypes; | |
| 533 int j = 0; | |
| 534 if (parentNested) { | |
| 535 nestTypes.push_back(parentNested->getType()); | |
| 536 j++; | |
| 537 } | |
| 538 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) { | |
| 539 VarDeclaration* vd = *i; | |
| 540 vd->llvmNestedIndex = j++; | |
| 541 if (vd->isParameter()) { | |
| 542 assert(vd->llvmValue); | |
| 543 nestTypes.push_back(vd->llvmValue->getType()); | |
| 544 } | |
| 545 else { | |
| 546 nestTypes.push_back(DtoType(vd->type)); | |
| 547 } | |
| 548 } | |
| 549 const llvm::StructType* nestSType = llvm::StructType::get(nestTypes); | |
| 550 Logger::cout() << "nested var struct has type:" << '\n' << *nestSType; | |
| 551 fd->llvmNested = new llvm::AllocaInst(nestSType,"nestedvars",f->llvmAllocaPoint); | |
| 552 if (parentNested) { | |
| 553 assert(fd->llvmThisVar); | |
| 554 llvm::Value* ptr = gIR->ir->CreateBitCast(fd->llvmThisVar, parentNested->getType(), "tmp"); | |
| 555 gIR->ir->CreateStore(ptr, DtoGEPi(fd->llvmNested, 0,0, "tmp")); | |
| 556 } | |
| 557 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) { | |
| 558 VarDeclaration* vd = *i; | |
| 559 if (vd->isParameter()) { | |
| 560 gIR->ir->CreateStore(vd->llvmValue, DtoGEPi(fd->llvmNested, 0, vd->llvmNestedIndex, "tmp")); | |
| 561 vd->llvmValue = fd->llvmNested; | |
| 562 } | |
| 563 } | |
| 564 } | |
| 565 | |
| 566 // copy _argptr to a memory location | |
| 567 if (f->linkage == LINKd && f->varargs == 1) | |
| 568 { | |
| 569 llvm::Value* argptrmem = new llvm::AllocaInst(fd->llvmArgPtr->getType(), "_argptrmem", gIR->topallocapoint()); | |
| 570 new llvm::StoreInst(fd->llvmArgPtr, argptrmem, gIR->scopebb()); | |
| 571 fd->llvmArgPtr = argptrmem; | |
| 572 } | |
| 573 | |
| 574 // output function body | |
| 575 fd->fbody->toIR(gIR); | |
| 576 | |
| 577 // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement | |
| 578 // in automatically, so we do it here. | |
| 579 if (!fd->isMain()) { | |
| 580 if (!gIR->scopereturned()) { | |
| 581 // pass the previous block into this block | |
| 582 if (global.params.symdebug) DtoDwarfFuncEnd(fd); | |
| 583 if (func->getReturnType() == llvm::Type::VoidTy) { | |
| 584 new llvm::ReturnInst(gIR->scopebb()); | |
| 585 } | |
| 586 else { | |
| 587 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb()); | |
| 588 } | |
| 589 } | |
| 590 } | |
| 591 | |
| 592 // erase alloca point | |
| 593 f->llvmAllocaPoint->eraseFromParent(); | |
| 594 f->llvmAllocaPoint = 0; | |
| 595 gIR->func()->allocapoint = 0; | |
| 596 | |
| 597 gIR->scopes.pop_back(); | |
| 598 | |
| 599 // get rid of the endentry block, it's never used | |
| 600 assert(!func->getBasicBlockList().empty()); | |
| 601 func->getBasicBlockList().pop_back(); | |
| 602 | |
| 603 // if the last block is empty now, it must be unreachable or it's a bug somewhere else | |
| 604 // would be nice to figure out how to assert that this is correct | |
| 605 llvm::BasicBlock* lastbb = &func->getBasicBlockList().back(); | |
| 606 if (lastbb->empty()) { | |
| 607 if (lastbb->getNumUses() == 0) | |
| 608 lastbb->eraseFromParent(); | |
| 609 else { | |
| 610 new llvm::UnreachableInst(lastbb); | |
| 611 /*if (func->getReturnType() == llvm::Type::VoidTy) { | |
| 612 new llvm::ReturnInst(lastbb); | |
| 613 } | |
| 614 else { | |
| 615 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), lastbb); | |
| 616 }*/ | |
| 617 } | |
| 618 } | |
| 619 | |
| 620 gIR->functions.pop_back(); | |
| 621 } | |
| 622 } | |
| 623 } | |
| 624 | |
| 625 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 626 | |
| 627 void DtoMain() | |
| 628 { | |
| 629 // emit main function llvm style | |
| 630 // int main(int argc, char**argv, char**env); | |
| 631 | |
| 632 assert(gIR != 0); | |
| 633 IRState& ir = *gIR; | |
| 634 | |
| 635 assert(ir.emitMain && ir.mainFunc); | |
| 636 | |
| 637 // parameter types | |
| 638 std::vector<const llvm::Type*> pvec; | |
| 639 pvec.push_back((const llvm::Type*)llvm::Type::Int32Ty); | |
| 640 const llvm::Type* chPtrType = (const llvm::Type*)llvm::PointerType::get(llvm::Type::Int8Ty); | |
| 641 pvec.push_back((const llvm::Type*)llvm::PointerType::get(chPtrType)); | |
| 642 pvec.push_back((const llvm::Type*)llvm::PointerType::get(chPtrType)); | |
| 643 const llvm::Type* rettype = (const llvm::Type*)llvm::Type::Int32Ty; | |
| 644 | |
| 645 llvm::FunctionType* functype = llvm::FunctionType::get(rettype, pvec, false); | |
| 646 llvm::Function* func = new llvm::Function(functype,llvm::GlobalValue::ExternalLinkage,"main",ir.module); | |
| 647 | |
| 648 llvm::BasicBlock* bb = new llvm::BasicBlock("entry",func); | |
| 649 | |
| 650 // call static ctors | |
| 651 llvm::Function* fn = LLVM_D_GetRuntimeFunction(ir.module,"_d_run_module_ctors"); | |
| 652 llvm::Instruction* apt = new llvm::CallInst(fn,"",bb); | |
| 653 | |
| 654 // call user main function | |
| 655 const llvm::FunctionType* mainty = ir.mainFunc->getFunctionType(); | |
| 656 llvm::CallInst* call; | |
| 657 if (mainty->getNumParams() > 0) | |
| 658 { | |
| 659 // main with arguments | |
| 660 assert(mainty->getNumParams() == 1); | |
| 661 std::vector<llvm::Value*> args; | |
| 662 llvm::Function* mfn = LLVM_D_GetRuntimeFunction(ir.module,"_d_main_args"); | |
| 663 | |
| 664 llvm::Function::arg_iterator argi = func->arg_begin(); | |
| 665 args.push_back(argi++); | |
| 666 args.push_back(argi++); | |
| 667 | |
| 668 const llvm::Type* at = mainty->getParamType(0)->getContainedType(0); | |
| 669 llvm::Value* arr = new llvm::AllocaInst(at->getContainedType(1)->getContainedType(0), func->arg_begin(), "argstorage", apt); | |
| 670 llvm::Value* a = new llvm::AllocaInst(at, "argarray", apt); | |
| 671 llvm::Value* ptr = DtoGEPi(a,0,0,"tmp",bb); | |
| 672 llvm::Value* v = args[0]; | |
| 673 if (v->getType() != DtoSize_t()) | |
| 674 v = new llvm::ZExtInst(v, DtoSize_t(), "tmp", bb); | |
| 675 new llvm::StoreInst(v,ptr,bb); | |
| 676 ptr = DtoGEPi(a,0,1,"tmp",bb); | |
| 677 new llvm::StoreInst(arr,ptr,bb); | |
| 678 args.push_back(a); | |
| 679 new llvm::CallInst(mfn, args.begin(), args.end(), "", bb); | |
| 680 call = new llvm::CallInst(ir.mainFunc,a,"ret",bb); | |
| 681 } | |
| 682 else | |
| 683 { | |
| 684 // main with no arguments | |
| 685 call = new llvm::CallInst(ir.mainFunc,"ret",bb); | |
| 686 } | |
| 687 call->setCallingConv(ir.mainFunc->getCallingConv()); | |
| 688 | |
| 689 // call static dtors | |
| 690 fn = LLVM_D_GetRuntimeFunction(ir.module,"_d_run_module_dtors"); | |
| 691 new llvm::CallInst(fn,"",bb); | |
| 692 | |
| 693 // return | |
| 694 new llvm::ReturnInst(call,bb); | |
| 695 } | |
| 696 | |
| 697 ////////////////////////////////////////////////////////////////////////////////////////// |