Mercurial > projects > ldc
annotate gen/functions.cpp @ 131:5825d48b27d1 trunk
[svn r135] * Merged DMD 1.025 *
* Fixed a minor linking order mishap *
* Added an command line option -annotate *
* Fixed some problems with running optimizations *
* Added std.stdio and dependencies to lphobos (still not 100% working, but compiles and links) *
* Fixed problems with passing aggregate types to variadic functions *
* Added initial code towards full GC support, currently based on malloc and friends, not all the runtime calls the GC yet for memory *
* Fixed problems with resolving nested function context pointers for some heavily nested cases *
* Redid function argument passing + other minor code cleanups, still lots to do on this end... *
| author | lindquist |
|---|---|
| date | Fri, 04 Jan 2008 01:38:42 +0100 |
| parents | 8096ba7082db |
| children | 1700239cab2e |
| 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 |
| 21 const llvm::FunctionType* DtoFunctionType(Type* type, const llvm::Type* thistype, bool ismain) | |
| 22 { | |
| 23 TypeFunction* f = (TypeFunction*)type; | |
| 24 assert(f != 0); | |
| 25 | |
| 26 if (type->llvmType != NULL) { | |
| 27 return llvm::cast<llvm::FunctionType>(type->llvmType->get()); | |
| 28 } | |
| 29 | |
| 30 bool typesafeVararg = false; | |
| 31 if (f->linkage == LINKd && f->varargs == 1) { | |
| 32 typesafeVararg = true; | |
| 33 } | |
| 34 | |
| 35 // return value type | |
| 36 const llvm::Type* rettype; | |
| 37 const llvm::Type* actualRettype; | |
| 38 Type* rt = f->next; | |
| 39 bool retinptr = false; | |
| 40 bool usesthis = false; | |
| 41 | |
| 42 if (ismain) { | |
| 43 rettype = llvm::Type::Int32Ty; | |
| 44 actualRettype = rettype; | |
| 45 } | |
| 46 else { | |
| 47 assert(rt); | |
|
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48 Type* rtfin = DtoDType(rt); |
| 100 | 49 if (DtoIsPassedByRef(rt)) { |
| 50 rettype = llvm::PointerType::get(DtoType(rt)); | |
| 51 actualRettype = llvm::Type::VoidTy; | |
| 52 f->llvmRetInPtr = retinptr = true; | |
| 53 } | |
| 54 else { | |
| 55 rettype = DtoType(rt); | |
| 56 actualRettype = rettype; | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 // parameter types | |
| 61 std::vector<const llvm::Type*> paramvec; | |
| 62 | |
| 63 if (retinptr) { | |
|
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64 //Logger::cout() << "returning through pointer parameter: " << *rettype << '\n'; |
| 100 | 65 paramvec.push_back(rettype); |
| 66 } | |
| 67 | |
| 68 if (thistype) { | |
| 69 paramvec.push_back(thistype); | |
| 70 usesthis = true; | |
| 71 } | |
| 72 | |
| 73 if (typesafeVararg) { | |
| 74 ClassDeclaration* ti = Type::typeinfo; | |
| 75 ti->toObjFile(); | |
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76 DtoForceConstInitDsymbol(ti); |
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77 assert(ti->llvmConstInit); |
| 100 | 78 std::vector<const llvm::Type*> types; |
| 79 types.push_back(DtoSize_t()); | |
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80 types.push_back(llvm::PointerType::get(llvm::PointerType::get(ti->llvmConstInit->getType()))); |
| 100 | 81 const llvm::Type* t1 = llvm::StructType::get(types); |
| 82 paramvec.push_back(llvm::PointerType::get(t1)); | |
| 83 paramvec.push_back(llvm::PointerType::get(llvm::Type::Int8Ty)); | |
| 84 } | |
| 85 | |
| 86 size_t n = Argument::dim(f->parameters); | |
| 87 | |
| 88 for (int i=0; i < n; ++i) { | |
| 89 Argument* arg = Argument::getNth(f->parameters, i); | |
| 90 // ensure scalar | |
| 91 Type* argT = DtoDType(arg->type); | |
| 92 assert(argT); | |
| 93 | |
| 94 const llvm::Type* at = DtoType(argT); | |
| 95 if (isaStruct(at)) { | |
| 96 Logger::println("struct param"); | |
| 97 paramvec.push_back(llvm::PointerType::get(at)); | |
| 98 } | |
| 99 else if (isaArray(at)) { | |
| 100 Logger::println("sarray param"); | |
| 101 assert(argT->ty == Tsarray); | |
| 102 //paramvec.push_back(llvm::PointerType::get(at->getContainedType(0))); | |
| 103 paramvec.push_back(llvm::PointerType::get(at)); | |
| 104 } | |
| 105 else if (llvm::isa<llvm::OpaqueType>(at)) { | |
| 106 Logger::println("opaque param"); | |
| 107 assert(argT->ty == Tstruct || argT->ty == Tclass); | |
| 108 paramvec.push_back(llvm::PointerType::get(at)); | |
| 109 } | |
| 110 else { | |
| 131 | 111 if ((arg->storageClass & STCref) || (arg->storageClass & STCout)) { |
| 112 Logger::println("by ref param"); | |
| 100 | 113 at = llvm::PointerType::get(at); |
| 114 } | |
| 115 else { | |
| 116 Logger::println("in param"); | |
| 117 } | |
| 118 paramvec.push_back(at); | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 // construct function type | |
| 123 bool isvararg = !typesafeVararg && f->varargs; | |
| 124 llvm::FunctionType* functype = llvm::FunctionType::get(actualRettype, paramvec, isvararg); | |
| 125 | |
| 126 f->llvmRetInPtr = retinptr; | |
| 127 f->llvmUsesThis = usesthis; | |
| 128 | |
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129 //if (!f->llvmType) |
| 100 | 130 f->llvmType = new llvm::PATypeHolder(functype); |
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131 //else |
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132 //assert(functype == f->llvmType->get()); |
| 100 | 133 |
| 134 return functype; | |
| 135 } | |
| 136 | |
| 137 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 138 | |
| 139 static const llvm::FunctionType* DtoVaFunctionType(FuncDeclaration* fdecl) | |
| 140 { | |
|
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141 // type has already been resolved |
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142 if (fdecl->type->llvmType != 0) { |
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143 return llvm::cast<llvm::FunctionType>(fdecl->type->llvmType->get()); |
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144 } |
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145 |
| 100 | 146 TypeFunction* f = (TypeFunction*)fdecl->type; |
| 147 assert(f != 0); | |
| 148 | |
| 149 const llvm::PointerType* i8pty = llvm::PointerType::get(llvm::Type::Int8Ty); | |
| 150 std::vector<const llvm::Type*> args; | |
| 151 | |
| 152 if (fdecl->llvmInternal == LLVMva_start) { | |
| 153 args.push_back(i8pty); | |
| 154 } | |
| 155 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
| 156 size_t n = Argument::dim(f->parameters); | |
| 157 for (size_t i=0; i<n; ++i) { | |
| 158 args.push_back(i8pty); | |
| 159 } | |
| 160 } | |
| 161 else | |
| 162 assert(0); | |
| 163 | |
| 164 const llvm::FunctionType* fty = llvm::FunctionType::get(llvm::Type::VoidTy, args, false); | |
| 165 | |
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166 f->llvmType = new llvm::PATypeHolder(fty); |
| 100 | 167 |
| 168 return fty; | |
| 169 } | |
| 170 | |
| 171 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 172 | |
| 173 const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl) | |
| 174 { | |
| 175 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
| 176 return DtoVaFunctionType(fdecl); | |
| 177 } | |
| 178 | |
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179 // unittest has null type, just build it manually |
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180 /*if (fdecl->isUnitTestDeclaration()) { |
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181 std::vector<const llvm::Type*> args; |
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182 return llvm::FunctionType::get(llvm::Type::VoidTy, args, false); |
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183 }*/ |
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184 |
| 100 | 185 // type has already been resolved |
| 186 if (fdecl->type->llvmType != 0) { | |
| 187 return llvm::cast<llvm::FunctionType>(fdecl->type->llvmType->get()); | |
| 188 } | |
| 189 | |
| 190 const llvm::Type* thisty = NULL; | |
| 191 if (fdecl->needThis()) { | |
| 192 if (AggregateDeclaration* ad = fdecl->isMember()) { | |
| 193 Logger::print("isMember = this is: %s\n", ad->type->toChars()); | |
| 194 thisty = DtoType(ad->type); | |
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195 //Logger::cout() << "this llvm type: " << *thisty << '\n'; |
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196 if (isaStruct(thisty) || (!gIR->structs.empty() && thisty == gIR->topstruct()->recty.get())) |
| 100 | 197 thisty = llvm::PointerType::get(thisty); |
| 198 } | |
| 199 else | |
| 200 assert(0); | |
| 201 } | |
| 202 else if (fdecl->isNested()) { | |
| 203 thisty = llvm::PointerType::get(llvm::Type::Int8Ty); | |
| 204 } | |
| 205 | |
| 206 const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, fdecl->isMain()); | |
| 207 | |
| 208 return functype; | |
| 209 } | |
| 210 | |
| 211 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 212 | |
| 213 static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl) | |
| 214 { | |
| 215 TypeFunction* f = (TypeFunction*)DtoDType(fdecl->type); | |
| 216 const llvm::FunctionType* fty = DtoVaFunctionType(fdecl); | |
| 217 llvm::Constant* fn = 0; | |
| 218 | |
| 219 if (fdecl->llvmInternal == LLVMva_start) { | |
| 220 fn = gIR->module->getOrInsertFunction("llvm.va_start", fty); | |
| 221 assert(fn); | |
| 222 } | |
| 223 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
| 224 fn = gIR->module->getOrInsertFunction(fdecl->llvmInternal1, fty); | |
| 225 assert(fn); | |
| 226 } | |
| 227 else | |
| 228 assert(0); | |
| 229 | |
| 230 llvm::Function* func = llvm::dyn_cast<llvm::Function>(fn); | |
| 231 assert(func); | |
| 232 assert(func->isIntrinsic()); | |
| 233 fdecl->llvmValue = func; | |
| 234 return func; | |
| 235 } | |
| 236 | |
| 237 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 238 | |
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239 void DtoResolveFunction(FuncDeclaration* fdecl) |
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240 { |
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241 if (!global.params.useUnitTests && fdecl->isUnitTestDeclaration()) { |
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242 return; // ignore declaration completely |
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243 } |
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244 |
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245 if (fdecl->llvmResolved) return; |
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246 fdecl->llvmResolved = true; |
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247 |
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248 Logger::println("DtoResolveFunction(%s)", fdecl->toPrettyChars()); |
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249 LOG_SCOPE; |
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250 |
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251 if (fdecl->llvmRunTimeHack) { |
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252 gIR->declareList.push_back(fdecl); |
| 127 | 253 TypeFunction* tf = (TypeFunction*)fdecl->type; |
| 254 tf->llvmRetInPtr = DtoIsPassedByRef(tf->next); | |
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255 return; |
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256 } |
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257 |
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258 if (fdecl->parent) |
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259 if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance()) |
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260 { |
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261 TemplateDeclaration* tempdecl = tinst->tempdecl; |
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262 if (tempdecl->llvmInternal == LLVMva_arg) |
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263 { |
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264 Logger::println("magic va_arg found"); |
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265 fdecl->llvmInternal = LLVMva_arg; |
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266 fdecl->llvmDeclared = true; |
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267 fdecl->llvmInitialized = true; |
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268 fdecl->llvmDefined = true; |
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269 return; // this gets mapped to an instruction so a declaration makes no sence |
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270 } |
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271 else if (tempdecl->llvmInternal == LLVMva_start) |
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272 { |
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273 Logger::println("magic va_start found"); |
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274 fdecl->llvmInternal = LLVMva_start; |
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275 } |
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276 } |
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277 |
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278 DtoFunctionType(fdecl); |
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279 |
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280 // queue declaration |
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281 if (!fdecl->isAbstract()) |
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282 gIR->declareList.push_back(fdecl); |
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283 } |
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284 |
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285 ////////////////////////////////////////////////////////////////////////////////////////// |
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286 |
| 100 | 287 void DtoDeclareFunction(FuncDeclaration* fdecl) |
| 288 { | |
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289 if (fdecl->llvmDeclared) return; |
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290 fdecl->llvmDeclared = true; |
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291 |
| 100 | 292 Logger::println("DtoDeclareFunction(%s)", fdecl->toPrettyChars()); |
| 293 LOG_SCOPE; | |
| 294 | |
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295 assert(!fdecl->isAbstract()); |
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296 |
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297 // intrinsic sanity check |
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298 if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) { |
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299 error(fdecl->loc, "intrinsics cannot have function bodies"); |
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300 fatal(); |
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301 } |
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302 |
| 100 | 303 if (fdecl->llvmRunTimeHack) { |
| 304 Logger::println("runtime hack func chars: %s", fdecl->toChars()); | |
| 305 if (!fdecl->llvmValue) | |
| 306 fdecl->llvmValue = LLVM_D_GetRuntimeFunction(gIR->module, fdecl->toChars()); | |
| 307 return; | |
| 308 } | |
| 309 | |
| 310 bool declareOnly = false; | |
|
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311 bool templInst = fdecl->parent && DtoIsTemplateInstance(fdecl->parent); |
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312 if (!templInst && fdecl->getModule() != gIR->dmodule) |
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313 declareOnly = true; |
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314 else if (fdecl->llvmInternal == LLVMva_start) |
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315 declareOnly = true; |
| 100 | 316 |
| 317 if (!fdecl->llvmIRFunc) { | |
| 318 fdecl->llvmIRFunc = new IRFunction(fdecl); | |
| 319 } | |
| 320 | |
| 321 // mangled name | |
| 322 char* mangled_name; | |
| 323 if (fdecl->llvmInternal == LLVMintrinsic) | |
| 324 mangled_name = fdecl->llvmInternal1; | |
| 325 else | |
| 326 mangled_name = fdecl->mangle(); | |
| 327 | |
| 328 llvm::Function* vafunc = 0; | |
| 329 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
| 330 vafunc = DtoDeclareVaFunction(fdecl); | |
| 331 } | |
| 332 | |
| 333 Type* t = DtoDType(fdecl->type); | |
| 334 TypeFunction* f = (TypeFunction*)t; | |
| 335 | |
| 336 // construct function | |
| 337 const llvm::FunctionType* functype = DtoFunctionType(fdecl); | |
| 338 llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name); | |
| 339 if (!func) | |
| 340 func = new llvm::Function(functype, DtoLinkage(fdecl->protection, fdecl->storage_class), mangled_name, gIR->module); | |
| 341 else | |
| 342 assert(func->getFunctionType() == functype); | |
| 343 | |
| 344 // add func to IRFunc | |
| 345 fdecl->llvmIRFunc->func = func; | |
| 346 | |
| 347 // calling convention | |
| 348 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic) | |
| 349 func->setCallingConv(DtoCallingConv(f->linkage)); | |
| 350 | |
| 351 // template instances should have weak linkage | |
| 352 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic && fdecl->parent && DtoIsTemplateInstance(fdecl->parent)) | |
| 353 func->setLinkage(llvm::GlobalValue::WeakLinkage); | |
| 354 | |
| 355 fdecl->llvmValue = func; | |
| 356 assert(llvm::isa<llvm::FunctionType>(f->llvmType->get())); | |
| 357 | |
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358 // main |
| 100 | 359 if (fdecl->isMain()) { |
| 360 gIR->mainFunc = func; | |
| 361 } | |
| 362 | |
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363 // static ctor |
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364 if (fdecl->isStaticCtorDeclaration()) { |
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365 gIR->ctors.push_back(fdecl); |
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366 } |
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367 // static dtor |
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368 else if (fdecl->isStaticDtorDeclaration()) { |
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369 gIR->dtors.push_back(fdecl); |
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370 } |
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371 |
| 100 | 372 // name parameters |
| 373 llvm::Function::arg_iterator iarg = func->arg_begin(); | |
| 374 int k = 0; | |
| 375 if (f->llvmRetInPtr) { | |
| 376 iarg->setName("retval"); | |
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377 fdecl->llvmRetArg = iarg; |
| 100 | 378 ++iarg; |
| 379 } | |
| 380 if (f->llvmUsesThis) { | |
| 381 iarg->setName("this"); | |
|
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382 fdecl->llvmThisVar = iarg; |
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383 assert(fdecl->llvmThisVar); |
| 100 | 384 ++iarg; |
| 385 } | |
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386 |
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387 if (f->linkage == LINKd && f->varargs == 1) { |
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388 iarg->setName("_arguments"); |
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389 fdecl->llvmArguments = iarg; |
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390 ++iarg; |
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391 iarg->setName("_argptr"); |
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392 fdecl->llvmArgPtr = iarg; |
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393 ++iarg; |
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394 } |
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395 |
| 100 | 396 for (; iarg != func->arg_end(); ++iarg) |
| 397 { | |
| 398 Argument* arg = Argument::getNth(f->parameters, k++); | |
| 399 //arg->llvmValue = iarg; | |
| 400 //Logger::println("identifier: '%s' %p\n", arg->ident->toChars(), arg->ident); | |
| 401 if (arg && arg->ident != 0) { | |
| 402 if (arg->vardecl) { | |
| 403 arg->vardecl->llvmValue = iarg; | |
| 404 } | |
| 405 iarg->setName(arg->ident->toChars()); | |
| 406 } | |
| 407 else { | |
| 408 iarg->setName("unnamed"); | |
| 409 } | |
| 410 } | |
| 411 | |
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412 if (fdecl->isUnitTestDeclaration()) |
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413 gIR->unitTests.push_back(fdecl); |
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414 |
| 100 | 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 void DtoDefineFunc(FuncDeclaration* fd) | |
| 424 { | |
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425 if (fd->llvmDefined) return; |
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426 fd->llvmDefined = true; |
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427 |
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428 assert(fd->llvmDeclared); |
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429 |
|
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430 Logger::println("DtoDefineFunc(%s)", fd->toPrettyChars()); |
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431 LOG_SCOPE; |
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432 |
| 100 | 433 // debug info |
| 434 if (global.params.symdebug) { | |
| 435 Module* mo = fd->getModule(); | |
| 436 if (!mo->llvmCompileUnit) { | |
| 437 mo->llvmCompileUnit = DtoDwarfCompileUnit(mo,false); | |
| 438 } | |
| 439 fd->llvmDwarfSubProgram = DtoDwarfSubProgram(fd, mo->llvmCompileUnit); | |
| 440 } | |
| 441 | |
| 442 Type* t = DtoDType(fd->type); | |
| 443 TypeFunction* f = (TypeFunction*)t; | |
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444 assert(f->llvmType); |
| 100 | 445 |
| 446 llvm::Function* func = fd->llvmIRFunc->func; | |
| 447 const llvm::FunctionType* functype = func->getFunctionType(); | |
| 448 | |
| 449 // only members of the current module or template instances maybe be defined | |
| 450 if (fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent)) | |
| 451 { | |
| 452 fd->llvmDModule = gIR->dmodule; | |
| 453 | |
| 454 // function definition | |
| 455 if (fd->fbody != 0) | |
| 456 { | |
| 457 Logger::println("Doing function body for: %s", fd->toChars()); | |
| 458 assert(fd->llvmIRFunc); | |
| 459 gIR->functions.push_back(fd->llvmIRFunc); | |
| 460 | |
| 461 if (fd->isMain()) | |
| 462 gIR->emitMain = true; | |
| 463 | |
| 464 llvm::BasicBlock* beginbb = new llvm::BasicBlock("entry",func); | |
| 465 llvm::BasicBlock* endbb = new llvm::BasicBlock("endentry",func); | |
| 466 | |
| 467 //assert(gIR->scopes.empty()); | |
| 468 gIR->scopes.push_back(IRScope(beginbb, endbb)); | |
| 469 | |
| 470 // create alloca point | |
|
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471 llvm::Instruction* allocaPoint = new llvm::BitCastInst(llvm::ConstantInt::get(llvm::Type::Int32Ty,0,false),llvm::Type::Int32Ty,"alloca point",gIR->scopebb()); |
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472 gIR->func()->allocapoint = allocaPoint; |
| 100 | 473 |
|
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474 // need result variable? (not nested) |
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475 if (fd->vresult && !fd->vresult->nestedref) { |
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476 Logger::println("non-nested vresult value"); |
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477 fd->vresult->llvmValue = new llvm::AllocaInst(DtoType(fd->vresult->type),"function_vresult",allocaPoint); |
|
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478 } |
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479 |
| 100 | 480 // give arguments storage |
| 481 size_t n = Argument::dim(f->parameters); | |
| 482 for (int i=0; i < n; ++i) { | |
| 483 Argument* arg = Argument::getNth(f->parameters, i); | |
| 484 if (arg && arg->vardecl) { | |
| 485 VarDeclaration* vd = arg->vardecl; | |
| 486 if (!vd->llvmNeedsStorage || vd->nestedref || vd->isRef() || vd->isOut() || DtoIsPassedByRef(vd->type)) | |
| 487 continue; | |
| 488 llvm::Value* a = vd->llvmValue; | |
| 489 assert(a); | |
| 490 std::string s(a->getName()); | |
| 491 Logger::println("giving argument '%s' storage", s.c_str()); | |
| 492 s.append("_storage"); | |
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493 llvm::Value* v = new llvm::AllocaInst(a->getType(),s,allocaPoint); |
| 100 | 494 gIR->ir->CreateStore(a,v); |
| 495 vd->llvmValue = v; | |
| 496 } | |
| 497 else { | |
| 498 Logger::attention("some unknown argument: %s", arg ? arg->toChars() : 0); | |
| 499 } | |
| 500 } | |
| 501 | |
| 502 // debug info | |
| 503 if (global.params.symdebug) DtoDwarfFuncStart(fd); | |
| 504 | |
| 505 llvm::Value* parentNested = NULL; | |
| 131 | 506 if (FuncDeclaration* fd2 = fd->toParent2()->isFuncDeclaration()) { |
| 507 if (!fd->isStatic()) // huh? | |
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508 parentNested = fd2->llvmNested; |
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509 } |
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510 |
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511 // need result variable? (nested) |
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512 if (fd->vresult && fd->vresult->nestedref) { |
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513 Logger::println("nested vresult value: %s", fd->vresult->toChars()); |
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514 fd->llvmNestedVars.insert(fd->vresult); |
| 100 | 515 } |
| 516 | |
| 517 // construct nested variables struct | |
| 518 if (!fd->llvmNestedVars.empty() || parentNested) { | |
| 519 std::vector<const llvm::Type*> nestTypes; | |
| 520 int j = 0; | |
| 521 if (parentNested) { | |
| 522 nestTypes.push_back(parentNested->getType()); | |
| 523 j++; | |
| 524 } | |
| 525 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) { | |
| 526 VarDeclaration* vd = *i; | |
| 527 vd->llvmNestedIndex = j++; | |
| 528 if (vd->isParameter()) { | |
| 529 assert(vd->llvmValue); | |
| 530 nestTypes.push_back(vd->llvmValue->getType()); | |
| 531 } | |
| 532 else { | |
| 533 nestTypes.push_back(DtoType(vd->type)); | |
| 534 } | |
| 535 } | |
| 536 const llvm::StructType* nestSType = llvm::StructType::get(nestTypes); | |
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537 Logger::cout() << "nested var struct has type:" << *nestSType << '\n'; |
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538 fd->llvmNested = new llvm::AllocaInst(nestSType,"nestedvars",allocaPoint); |
| 100 | 539 if (parentNested) { |
| 540 assert(fd->llvmThisVar); | |
| 541 llvm::Value* ptr = gIR->ir->CreateBitCast(fd->llvmThisVar, parentNested->getType(), "tmp"); | |
| 542 gIR->ir->CreateStore(ptr, DtoGEPi(fd->llvmNested, 0,0, "tmp")); | |
| 543 } | |
| 544 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) { | |
| 545 VarDeclaration* vd = *i; | |
| 546 if (vd->isParameter()) { | |
| 547 gIR->ir->CreateStore(vd->llvmValue, DtoGEPi(fd->llvmNested, 0, vd->llvmNestedIndex, "tmp")); | |
| 548 vd->llvmValue = fd->llvmNested; | |
| 549 } | |
| 550 } | |
| 551 } | |
| 552 | |
| 553 // copy _argptr to a memory location | |
| 554 if (f->linkage == LINKd && f->varargs == 1) | |
| 555 { | |
| 556 llvm::Value* argptrmem = new llvm::AllocaInst(fd->llvmArgPtr->getType(), "_argptrmem", gIR->topallocapoint()); | |
| 557 new llvm::StoreInst(fd->llvmArgPtr, argptrmem, gIR->scopebb()); | |
| 558 fd->llvmArgPtr = argptrmem; | |
| 559 } | |
| 560 | |
| 561 // output function body | |
| 562 fd->fbody->toIR(gIR); | |
| 563 | |
| 564 // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement | |
| 565 // in automatically, so we do it here. | |
| 566 if (!fd->isMain()) { | |
| 567 if (!gIR->scopereturned()) { | |
| 568 // pass the previous block into this block | |
| 569 if (global.params.symdebug) DtoDwarfFuncEnd(fd); | |
| 570 if (func->getReturnType() == llvm::Type::VoidTy) { | |
| 571 new llvm::ReturnInst(gIR->scopebb()); | |
| 572 } | |
| 573 else { | |
| 574 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb()); | |
| 575 } | |
| 576 } | |
| 577 } | |
| 578 | |
| 579 // erase alloca point | |
|
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580 allocaPoint->eraseFromParent(); |
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581 allocaPoint = 0; |
| 100 | 582 gIR->func()->allocapoint = 0; |
| 583 | |
| 584 gIR->scopes.pop_back(); | |
| 585 | |
| 586 // get rid of the endentry block, it's never used | |
| 587 assert(!func->getBasicBlockList().empty()); | |
| 588 func->getBasicBlockList().pop_back(); | |
| 589 | |
| 590 // if the last block is empty now, it must be unreachable or it's a bug somewhere else | |
| 591 // would be nice to figure out how to assert that this is correct | |
| 592 llvm::BasicBlock* lastbb = &func->getBasicBlockList().back(); | |
| 593 if (lastbb->empty()) { | |
| 594 if (lastbb->getNumUses() == 0) | |
| 595 lastbb->eraseFromParent(); | |
| 596 else { | |
| 597 new llvm::UnreachableInst(lastbb); | |
| 598 /*if (func->getReturnType() == llvm::Type::VoidTy) { | |
| 599 new llvm::ReturnInst(lastbb); | |
| 600 } | |
| 601 else { | |
| 602 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), lastbb); | |
| 603 }*/ | |
| 604 } | |
| 605 } | |
| 606 | |
| 607 gIR->functions.pop_back(); | |
| 608 } | |
| 609 } | |
| 610 } | |
| 611 | |
| 612 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 613 | |
| 614 void DtoMain() | |
| 615 { | |
| 616 // emit main function llvm style | |
| 617 // int main(int argc, char**argv, char**env); | |
| 618 | |
| 619 assert(gIR != 0); | |
| 620 IRState& ir = *gIR; | |
| 621 | |
| 622 assert(ir.emitMain && ir.mainFunc); | |
| 623 | |
| 624 // parameter types | |
| 625 std::vector<const llvm::Type*> pvec; | |
| 626 pvec.push_back((const llvm::Type*)llvm::Type::Int32Ty); | |
| 627 const llvm::Type* chPtrType = (const llvm::Type*)llvm::PointerType::get(llvm::Type::Int8Ty); | |
| 628 pvec.push_back((const llvm::Type*)llvm::PointerType::get(chPtrType)); | |
| 629 pvec.push_back((const llvm::Type*)llvm::PointerType::get(chPtrType)); | |
| 630 const llvm::Type* rettype = (const llvm::Type*)llvm::Type::Int32Ty; | |
| 631 | |
| 632 llvm::FunctionType* functype = llvm::FunctionType::get(rettype, pvec, false); | |
| 633 llvm::Function* func = new llvm::Function(functype,llvm::GlobalValue::ExternalLinkage,"main",ir.module); | |
| 634 | |
| 635 llvm::BasicBlock* bb = new llvm::BasicBlock("entry",func); | |
| 636 | |
| 637 // call static ctors | |
| 117 | 638 llvm::Function* fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleCtor"); |
| 100 | 639 llvm::Instruction* apt = new llvm::CallInst(fn,"",bb); |
| 640 | |
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641 // run unit tests if -unittest is provided |
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642 if (global.params.useUnitTests) { |
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643 fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleUnitTests"); |
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644 llvm::Instruction* apt = new llvm::CallInst(fn,"",bb); |
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645 } |
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646 |
| 100 | 647 // call user main function |
| 648 const llvm::FunctionType* mainty = ir.mainFunc->getFunctionType(); | |
| 649 llvm::CallInst* call; | |
| 650 if (mainty->getNumParams() > 0) | |
| 651 { | |
| 652 // main with arguments | |
| 653 assert(mainty->getNumParams() == 1); | |
| 654 std::vector<llvm::Value*> args; | |
| 655 llvm::Function* mfn = LLVM_D_GetRuntimeFunction(ir.module,"_d_main_args"); | |
| 656 | |
| 657 llvm::Function::arg_iterator argi = func->arg_begin(); | |
| 658 args.push_back(argi++); | |
| 659 args.push_back(argi++); | |
| 660 | |
| 661 const llvm::Type* at = mainty->getParamType(0)->getContainedType(0); | |
| 662 llvm::Value* arr = new llvm::AllocaInst(at->getContainedType(1)->getContainedType(0), func->arg_begin(), "argstorage", apt); | |
| 663 llvm::Value* a = new llvm::AllocaInst(at, "argarray", apt); | |
| 664 llvm::Value* ptr = DtoGEPi(a,0,0,"tmp",bb); | |
| 665 llvm::Value* v = args[0]; | |
| 666 if (v->getType() != DtoSize_t()) | |
| 667 v = new llvm::ZExtInst(v, DtoSize_t(), "tmp", bb); | |
| 668 new llvm::StoreInst(v,ptr,bb); | |
| 669 ptr = DtoGEPi(a,0,1,"tmp",bb); | |
| 670 new llvm::StoreInst(arr,ptr,bb); | |
| 671 args.push_back(a); | |
| 672 new llvm::CallInst(mfn, args.begin(), args.end(), "", bb); | |
| 673 call = new llvm::CallInst(ir.mainFunc,a,"ret",bb); | |
| 674 } | |
| 675 else | |
| 676 { | |
| 677 // main with no arguments | |
| 678 call = new llvm::CallInst(ir.mainFunc,"ret",bb); | |
| 679 } | |
| 680 call->setCallingConv(ir.mainFunc->getCallingConv()); | |
| 681 | |
| 682 // call static dtors | |
| 117 | 683 fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleDtor"); |
| 100 | 684 new llvm::CallInst(fn,"",bb); |
| 685 | |
| 686 // return | |
| 687 new llvm::ReturnInst(call,bb); | |
| 688 } | |
| 689 | |
| 690 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 117 | 691 |
| 692 const llvm::FunctionType* DtoBaseFunctionType(FuncDeclaration* fdecl) | |
| 693 { | |
| 694 Dsymbol* parent = fdecl->toParent(); | |
| 695 ClassDeclaration* cd = parent->isClassDeclaration(); | |
| 696 assert(cd); | |
| 697 | |
| 698 FuncDeclaration* f = fdecl; | |
| 699 | |
| 700 while (cd) | |
| 701 { | |
| 702 ClassDeclaration* base = cd->baseClass; | |
| 703 if (!base) | |
| 704 break; | |
| 705 FuncDeclaration* f2 = base->findFunc(fdecl->ident, (TypeFunction*)fdecl->type); | |
| 706 if (f2) { | |
| 707 f = f2; | |
| 708 cd = base; | |
| 709 } | |
| 710 else | |
| 711 break; | |
| 712 } | |
| 713 | |
| 714 DtoResolveDsymbol(f); | |
| 715 return llvm::cast<llvm::FunctionType>(DtoType(f->type)); | |
| 716 } | |
| 717 | |
| 718 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 131 | 719 |
| 720 DValue* DtoArgument(Argument* fnarg, Expression* argexp) | |
| 721 { | |
| 722 Logger::println("DtoArgument"); | |
| 723 LOG_SCOPE; | |
| 724 | |
| 725 DValue* arg = argexp->toElem(gIR); | |
| 726 | |
| 727 // ref/out arg | |
| 728 if (fnarg && ((fnarg->storageClass & STCref) || (fnarg->storageClass & STCout))) | |
| 729 { | |
| 730 if (arg->isVar() || arg->isLRValue()) | |
| 731 arg = new DImValue(argexp->type, arg->getLVal(), false); | |
| 732 else | |
| 733 arg = new DImValue(argexp->type, arg->getRVal(), false); | |
| 734 } | |
| 735 // aggregate arg | |
| 736 else if (DtoIsPassedByRef(argexp->type)) | |
| 737 { | |
| 738 llvm::Value* alloc = new llvm::AllocaInst(DtoType(argexp->type), "tmpparam", gIR->topallocapoint()); | |
| 739 DVarValue* vv = new DVarValue(argexp->type, alloc, true); | |
| 740 DtoAssign(vv, arg); | |
| 741 arg = vv; | |
| 742 } | |
| 743 // normal arg (basic/value type) | |
| 744 else | |
| 745 { | |
| 746 // nothing to do | |
| 747 } | |
| 748 | |
| 749 return arg; | |
| 750 } | |
| 751 | |
| 752 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 753 | |
| 754 void DtoVariadicArgument(Expression* argexp, llvm::Value* dst) | |
| 755 { | |
| 756 Logger::println("DtoVariadicArgument"); | |
| 757 LOG_SCOPE; | |
| 758 DVarValue* vv = new DVarValue(argexp->type, dst, true); | |
| 759 DtoAssign(vv, argexp->toElem(gIR)); | |
| 760 } | |
| 761 | |
| 762 ////////////////////////////////////////////////////////////////////////////////////////// |