Mercurial > projects > ldc
annotate gen/functions.cpp @ 133:44a95ac7368a trunk
[svn r137] Many fixes towards tango.io.Console working, but not quite there yet...
In particular, assertions has been fixed to include file/line info, and much more!
| author | lindquist |
|---|---|
| date | Mon, 14 Jan 2008 05:11:54 +0100 |
| parents | 1700239cab2e |
| children | 0e28624814e8 |
| 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)) { |
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50 rettype = getPtrToType(DtoType(rt)); |
| 100 | 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(getPtrToType(getPtrToType(ti->llvmConstInit->getType()))); |
| 100 | 81 const llvm::Type* t1 = llvm::StructType::get(types); |
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82 paramvec.push_back(getPtrToType(t1)); |
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83 paramvec.push_back(getPtrToType(llvm::Type::Int8Ty)); |
| 100 | 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"); | |
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97 paramvec.push_back(getPtrToType(at)); |
| 100 | 98 } |
| 99 else if (isaArray(at)) { | |
| 100 Logger::println("sarray param"); | |
| 101 assert(argT->ty == Tsarray); | |
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102 //paramvec.push_back(getPtrToType(at->getContainedType(0))); |
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103 paramvec.push_back(getPtrToType(at)); |
| 100 | 104 } |
| 105 else if (llvm::isa<llvm::OpaqueType>(at)) { | |
| 106 Logger::println("opaque param"); | |
| 107 assert(argT->ty == Tstruct || argT->ty == Tclass); | |
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108 paramvec.push_back(getPtrToType(at)); |
| 100 | 109 } |
| 110 else { | |
| 131 | 111 if ((arg->storageClass & STCref) || (arg->storageClass & STCout)) { |
| 112 Logger::println("by ref param"); | |
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113 at = getPtrToType(at); |
| 100 | 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 | |
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149 const llvm::PointerType* i8pty = getPtrToType(llvm::Type::Int8Ty); |
| 100 | 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()) { | |
| 132 | 192 if (AggregateDeclaration* ad = fdecl->isMember2()) { |
| 193 Logger::println("isMember = this is: %s", ad->type->toChars()); | |
| 100 | 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())) |
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197 thisty = getPtrToType(thisty); |
| 100 | 198 } |
| 132 | 199 else { |
| 200 Logger::println("chars: %s type: %s kind: %s", fdecl->toChars(), fdecl->type->toChars(), fdecl->kind()); | |
| 201 assert(0); | |
| 202 } | |
| 100 | 203 } |
| 204 else if (fdecl->isNested()) { | |
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205 thisty = getPtrToType(llvm::Type::Int8Ty); |
| 100 | 206 } |
| 207 | |
| 208 const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, fdecl->isMain()); | |
| 209 | |
| 210 return functype; | |
| 211 } | |
| 212 | |
| 213 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 214 | |
| 215 static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl) | |
| 216 { | |
| 217 TypeFunction* f = (TypeFunction*)DtoDType(fdecl->type); | |
| 218 const llvm::FunctionType* fty = DtoVaFunctionType(fdecl); | |
| 219 llvm::Constant* fn = 0; | |
| 220 | |
| 221 if (fdecl->llvmInternal == LLVMva_start) { | |
| 222 fn = gIR->module->getOrInsertFunction("llvm.va_start", fty); | |
| 223 assert(fn); | |
| 224 } | |
| 225 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
| 226 fn = gIR->module->getOrInsertFunction(fdecl->llvmInternal1, fty); | |
| 227 assert(fn); | |
| 228 } | |
| 229 else | |
| 230 assert(0); | |
| 231 | |
| 232 llvm::Function* func = llvm::dyn_cast<llvm::Function>(fn); | |
| 233 assert(func); | |
| 234 assert(func->isIntrinsic()); | |
| 235 fdecl->llvmValue = func; | |
| 236 return func; | |
| 237 } | |
| 238 | |
| 239 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 240 | |
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241 void DtoResolveFunction(FuncDeclaration* fdecl) |
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242 { |
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243 if (!global.params.useUnitTests && fdecl->isUnitTestDeclaration()) { |
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244 return; // ignore declaration completely |
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245 } |
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246 |
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247 // is imported and we don't have access? |
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248 if (fdecl->getModule() != gIR->dmodule) |
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249 { |
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250 if (fdecl->prot() == PROTprivate) |
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251 return; |
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252 } |
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253 |
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254 if (fdecl->llvmResolved) return; |
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255 fdecl->llvmResolved = true; |
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256 |
| 132 | 257 Logger::println("DtoResolveFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
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258 LOG_SCOPE; |
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259 |
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260 if (fdecl->llvmRunTimeHack) { |
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261 gIR->declareList.push_back(fdecl); |
| 127 | 262 TypeFunction* tf = (TypeFunction*)fdecl->type; |
| 263 tf->llvmRetInPtr = DtoIsPassedByRef(tf->next); | |
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264 return; |
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265 } |
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266 |
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267 if (fdecl->parent) |
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268 if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance()) |
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269 { |
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270 TemplateDeclaration* tempdecl = tinst->tempdecl; |
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271 if (tempdecl->llvmInternal == LLVMva_arg) |
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272 { |
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273 Logger::println("magic va_arg found"); |
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274 fdecl->llvmInternal = LLVMva_arg; |
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275 fdecl->llvmDeclared = true; |
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276 fdecl->llvmInitialized = true; |
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277 fdecl->llvmDefined = true; |
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278 return; // this gets mapped to an instruction so a declaration makes no sence |
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279 } |
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280 else if (tempdecl->llvmInternal == LLVMva_start) |
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281 { |
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282 Logger::println("magic va_start found"); |
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283 fdecl->llvmInternal = LLVMva_start; |
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284 } |
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285 } |
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286 |
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287 DtoFunctionType(fdecl); |
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288 |
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289 // queue declaration |
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290 if (!fdecl->isAbstract()) |
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291 gIR->declareList.push_back(fdecl); |
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292 } |
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293 |
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294 ////////////////////////////////////////////////////////////////////////////////////////// |
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295 |
| 100 | 296 void DtoDeclareFunction(FuncDeclaration* fdecl) |
| 297 { | |
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298 if (fdecl->llvmDeclared) return; |
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299 fdecl->llvmDeclared = true; |
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300 |
| 132 | 301 Logger::println("DtoDeclareFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
| 100 | 302 LOG_SCOPE; |
| 303 | |
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304 assert(!fdecl->isAbstract()); |
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305 |
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306 // intrinsic sanity check |
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307 if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) { |
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308 error(fdecl->loc, "intrinsics cannot have function bodies"); |
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309 fatal(); |
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310 } |
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311 |
| 100 | 312 if (fdecl->llvmRunTimeHack) { |
| 313 Logger::println("runtime hack func chars: %s", fdecl->toChars()); | |
| 314 if (!fdecl->llvmValue) | |
| 315 fdecl->llvmValue = LLVM_D_GetRuntimeFunction(gIR->module, fdecl->toChars()); | |
| 316 return; | |
| 317 } | |
| 318 | |
| 319 bool declareOnly = false; | |
|
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320 bool templInst = fdecl->parent && DtoIsTemplateInstance(fdecl->parent); |
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321 if (!templInst && fdecl->getModule() != gIR->dmodule) |
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322 declareOnly = true; |
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323 else if (fdecl->llvmInternal == LLVMva_start) |
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324 declareOnly = true; |
| 100 | 325 |
| 326 if (!fdecl->llvmIRFunc) { | |
| 327 fdecl->llvmIRFunc = new IRFunction(fdecl); | |
| 328 } | |
| 329 | |
| 330 // mangled name | |
| 331 char* mangled_name; | |
| 332 if (fdecl->llvmInternal == LLVMintrinsic) | |
| 333 mangled_name = fdecl->llvmInternal1; | |
| 334 else | |
| 335 mangled_name = fdecl->mangle(); | |
| 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 | |
| 132 | 364 // extern(C) functions are always external |
| 365 if (f->linkage == LINKc) | |
| 366 func->setLinkage(llvm::GlobalValue::ExternalLinkage); | |
| 367 | |
| 368 // intrinsics are always external C | |
| 369 if (fdecl->llvmInternal == LLVMintrinsic) | |
| 370 { | |
| 371 func->setLinkage(llvm::GlobalValue::ExternalLinkage); | |
| 372 func->setCallingConv(llvm::CallingConv::C); | |
| 373 } | |
| 374 | |
| 100 | 375 fdecl->llvmValue = func; |
| 376 assert(llvm::isa<llvm::FunctionType>(f->llvmType->get())); | |
| 377 | |
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378 // main |
| 100 | 379 if (fdecl->isMain()) { |
| 380 gIR->mainFunc = func; | |
| 381 } | |
| 382 | |
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383 // static ctor |
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384 if (fdecl->isStaticCtorDeclaration()) { |
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385 gIR->ctors.push_back(fdecl); |
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386 } |
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387 // static dtor |
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388 else if (fdecl->isStaticDtorDeclaration()) { |
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389 gIR->dtors.push_back(fdecl); |
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390 } |
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391 |
| 100 | 392 // name parameters |
| 393 llvm::Function::arg_iterator iarg = func->arg_begin(); | |
| 394 int k = 0; | |
| 395 if (f->llvmRetInPtr) { | |
| 396 iarg->setName("retval"); | |
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397 fdecl->llvmRetArg = iarg; |
| 100 | 398 ++iarg; |
| 399 } | |
| 400 if (f->llvmUsesThis) { | |
| 401 iarg->setName("this"); | |
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402 fdecl->llvmThisVar = iarg; |
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403 assert(fdecl->llvmThisVar); |
| 100 | 404 ++iarg; |
| 405 } | |
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406 |
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407 if (f->linkage == LINKd && f->varargs == 1) { |
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408 iarg->setName("_arguments"); |
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409 fdecl->llvmArguments = iarg; |
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410 ++iarg; |
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411 iarg->setName("_argptr"); |
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412 fdecl->llvmArgPtr = iarg; |
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413 ++iarg; |
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414 } |
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415 |
| 100 | 416 for (; iarg != func->arg_end(); ++iarg) |
| 417 { | |
| 418 Argument* arg = Argument::getNth(f->parameters, k++); | |
| 419 //arg->llvmValue = iarg; | |
| 420 //Logger::println("identifier: '%s' %p\n", arg->ident->toChars(), arg->ident); | |
| 421 if (arg && arg->ident != 0) { | |
| 422 if (arg->vardecl) { | |
| 423 arg->vardecl->llvmValue = iarg; | |
| 424 } | |
| 425 iarg->setName(arg->ident->toChars()); | |
| 426 } | |
| 427 else { | |
| 428 iarg->setName("unnamed"); | |
| 429 } | |
| 430 } | |
| 431 | |
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432 if (fdecl->isUnitTestDeclaration()) |
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433 gIR->unitTests.push_back(fdecl); |
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434 |
| 100 | 435 if (!declareOnly) |
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436 gIR->defineList.push_back(fdecl); |
|
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437 else |
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438 assert(func->getLinkage() != llvm::GlobalValue::InternalLinkage); |
| 100 | 439 |
| 440 Logger::cout() << "func decl: " << *func << '\n'; | |
| 441 } | |
| 442 | |
| 443 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 444 | |
| 445 void DtoDefineFunc(FuncDeclaration* fd) | |
| 446 { | |
|
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447 if (fd->llvmDefined) return; |
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448 fd->llvmDefined = true; |
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449 |
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450 assert(fd->llvmDeclared); |
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451 |
| 132 | 452 Logger::println("DtoDefineFunc(%s): %s", fd->toPrettyChars(), fd->loc.toChars()); |
|
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453 LOG_SCOPE; |
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454 |
| 100 | 455 // debug info |
| 456 if (global.params.symdebug) { | |
| 457 Module* mo = fd->getModule(); | |
| 458 if (!mo->llvmCompileUnit) { | |
| 459 mo->llvmCompileUnit = DtoDwarfCompileUnit(mo,false); | |
| 460 } | |
| 461 fd->llvmDwarfSubProgram = DtoDwarfSubProgram(fd, mo->llvmCompileUnit); | |
| 462 } | |
| 463 | |
| 464 Type* t = DtoDType(fd->type); | |
| 465 TypeFunction* f = (TypeFunction*)t; | |
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466 assert(f->llvmType); |
| 100 | 467 |
| 468 llvm::Function* func = fd->llvmIRFunc->func; | |
| 469 const llvm::FunctionType* functype = func->getFunctionType(); | |
| 470 | |
| 471 // only members of the current module or template instances maybe be defined | |
| 472 if (fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent)) | |
| 473 { | |
| 474 fd->llvmDModule = gIR->dmodule; | |
| 475 | |
| 476 // function definition | |
| 477 if (fd->fbody != 0) | |
| 478 { | |
| 479 Logger::println("Doing function body for: %s", fd->toChars()); | |
| 480 assert(fd->llvmIRFunc); | |
| 481 gIR->functions.push_back(fd->llvmIRFunc); | |
| 482 | |
| 483 if (fd->isMain()) | |
| 484 gIR->emitMain = true; | |
| 485 | |
| 486 llvm::BasicBlock* beginbb = new llvm::BasicBlock("entry",func); | |
| 487 llvm::BasicBlock* endbb = new llvm::BasicBlock("endentry",func); | |
| 488 | |
| 489 //assert(gIR->scopes.empty()); | |
| 490 gIR->scopes.push_back(IRScope(beginbb, endbb)); | |
| 491 | |
| 492 // create alloca point | |
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493 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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494 gIR->func()->allocapoint = allocaPoint; |
| 100 | 495 |
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496 // need result variable? (not nested) |
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497 if (fd->vresult && !fd->vresult->nestedref) { |
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498 Logger::println("non-nested vresult value"); |
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499 fd->vresult->llvmValue = new llvm::AllocaInst(DtoType(fd->vresult->type),"function_vresult",allocaPoint); |
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500 } |
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501 |
| 100 | 502 // give arguments storage |
| 503 size_t n = Argument::dim(f->parameters); | |
| 504 for (int i=0; i < n; ++i) { | |
| 505 Argument* arg = Argument::getNth(f->parameters, i); | |
| 506 if (arg && arg->vardecl) { | |
| 507 VarDeclaration* vd = arg->vardecl; | |
| 508 if (!vd->llvmNeedsStorage || vd->nestedref || vd->isRef() || vd->isOut() || DtoIsPassedByRef(vd->type)) | |
| 509 continue; | |
| 510 llvm::Value* a = vd->llvmValue; | |
| 511 assert(a); | |
| 512 std::string s(a->getName()); | |
| 513 Logger::println("giving argument '%s' storage", s.c_str()); | |
| 514 s.append("_storage"); | |
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515 llvm::Value* v = new llvm::AllocaInst(a->getType(),s,allocaPoint); |
| 100 | 516 gIR->ir->CreateStore(a,v); |
| 517 vd->llvmValue = v; | |
| 518 } | |
| 519 else { | |
| 132 | 520 Logger::attention(fd->loc, "some unknown argument: %s", arg ? arg->toChars() : 0); |
| 100 | 521 } |
| 522 } | |
| 523 | |
| 524 // debug info | |
| 525 if (global.params.symdebug) DtoDwarfFuncStart(fd); | |
| 526 | |
| 527 llvm::Value* parentNested = NULL; | |
| 131 | 528 if (FuncDeclaration* fd2 = fd->toParent2()->isFuncDeclaration()) { |
| 529 if (!fd->isStatic()) // huh? | |
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530 parentNested = fd2->llvmNested; |
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531 } |
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532 |
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533 // need result variable? (nested) |
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534 if (fd->vresult && fd->vresult->nestedref) { |
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535 Logger::println("nested vresult value: %s", fd->vresult->toChars()); |
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536 fd->llvmNestedVars.insert(fd->vresult); |
| 100 | 537 } |
| 538 | |
| 539 // construct nested variables struct | |
| 540 if (!fd->llvmNestedVars.empty() || parentNested) { | |
| 541 std::vector<const llvm::Type*> nestTypes; | |
| 542 int j = 0; | |
| 543 if (parentNested) { | |
| 544 nestTypes.push_back(parentNested->getType()); | |
| 545 j++; | |
| 546 } | |
| 547 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) { | |
| 548 VarDeclaration* vd = *i; | |
| 549 vd->llvmNestedIndex = j++; | |
| 550 if (vd->isParameter()) { | |
| 551 assert(vd->llvmValue); | |
| 552 nestTypes.push_back(vd->llvmValue->getType()); | |
| 553 } | |
| 554 else { | |
| 555 nestTypes.push_back(DtoType(vd->type)); | |
| 556 } | |
| 557 } | |
| 558 const llvm::StructType* nestSType = llvm::StructType::get(nestTypes); | |
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559 Logger::cout() << "nested var struct has type:" << *nestSType << '\n'; |
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560 fd->llvmNested = new llvm::AllocaInst(nestSType,"nestedvars",allocaPoint); |
| 100 | 561 if (parentNested) { |
| 562 assert(fd->llvmThisVar); | |
| 563 llvm::Value* ptr = gIR->ir->CreateBitCast(fd->llvmThisVar, parentNested->getType(), "tmp"); | |
| 564 gIR->ir->CreateStore(ptr, DtoGEPi(fd->llvmNested, 0,0, "tmp")); | |
| 565 } | |
| 566 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) { | |
| 567 VarDeclaration* vd = *i; | |
| 568 if (vd->isParameter()) { | |
| 569 gIR->ir->CreateStore(vd->llvmValue, DtoGEPi(fd->llvmNested, 0, vd->llvmNestedIndex, "tmp")); | |
| 570 vd->llvmValue = fd->llvmNested; | |
| 571 } | |
| 572 } | |
| 573 } | |
| 574 | |
| 575 // copy _argptr to a memory location | |
| 576 if (f->linkage == LINKd && f->varargs == 1) | |
| 577 { | |
| 578 llvm::Value* argptrmem = new llvm::AllocaInst(fd->llvmArgPtr->getType(), "_argptrmem", gIR->topallocapoint()); | |
| 579 new llvm::StoreInst(fd->llvmArgPtr, argptrmem, gIR->scopebb()); | |
| 580 fd->llvmArgPtr = argptrmem; | |
| 581 } | |
| 582 | |
| 583 // output function body | |
| 584 fd->fbody->toIR(gIR); | |
| 585 | |
| 586 // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement | |
| 587 // in automatically, so we do it here. | |
| 588 if (!fd->isMain()) { | |
| 589 if (!gIR->scopereturned()) { | |
| 590 // pass the previous block into this block | |
| 591 if (global.params.symdebug) DtoDwarfFuncEnd(fd); | |
| 592 if (func->getReturnType() == llvm::Type::VoidTy) { | |
| 593 new llvm::ReturnInst(gIR->scopebb()); | |
| 594 } | |
| 595 else { | |
| 596 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb()); | |
| 597 } | |
| 598 } | |
| 599 } | |
| 600 | |
| 601 // erase alloca point | |
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602 allocaPoint->eraseFromParent(); |
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603 allocaPoint = 0; |
| 100 | 604 gIR->func()->allocapoint = 0; |
| 605 | |
| 606 gIR->scopes.pop_back(); | |
| 607 | |
| 608 // get rid of the endentry block, it's never used | |
| 609 assert(!func->getBasicBlockList().empty()); | |
| 610 func->getBasicBlockList().pop_back(); | |
| 611 | |
| 612 // if the last block is empty now, it must be unreachable or it's a bug somewhere else | |
| 613 // would be nice to figure out how to assert that this is correct | |
| 614 llvm::BasicBlock* lastbb = &func->getBasicBlockList().back(); | |
| 615 if (lastbb->empty()) { | |
| 616 if (lastbb->getNumUses() == 0) | |
| 617 lastbb->eraseFromParent(); | |
| 618 else { | |
| 619 new llvm::UnreachableInst(lastbb); | |
| 620 /*if (func->getReturnType() == llvm::Type::VoidTy) { | |
| 621 new llvm::ReturnInst(lastbb); | |
| 622 } | |
| 623 else { | |
| 624 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), lastbb); | |
| 625 }*/ | |
| 626 } | |
| 627 } | |
| 628 | |
| 629 gIR->functions.pop_back(); | |
| 630 } | |
| 631 } | |
| 632 } | |
| 633 | |
| 634 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 635 | |
| 636 void DtoMain() | |
| 637 { | |
| 638 // emit main function llvm style | |
| 639 // int main(int argc, char**argv, char**env); | |
| 640 | |
| 641 assert(gIR != 0); | |
| 642 IRState& ir = *gIR; | |
| 643 | |
| 644 assert(ir.emitMain && ir.mainFunc); | |
| 645 | |
| 646 // parameter types | |
| 647 std::vector<const llvm::Type*> pvec; | |
| 648 pvec.push_back((const llvm::Type*)llvm::Type::Int32Ty); | |
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649 const llvm::Type* chPtrType = (const llvm::Type*)getPtrToType(llvm::Type::Int8Ty); |
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650 pvec.push_back((const llvm::Type*)getPtrToType(chPtrType)); |
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651 pvec.push_back((const llvm::Type*)getPtrToType(chPtrType)); |
| 100 | 652 const llvm::Type* rettype = (const llvm::Type*)llvm::Type::Int32Ty; |
| 653 | |
| 654 llvm::FunctionType* functype = llvm::FunctionType::get(rettype, pvec, false); | |
| 655 llvm::Function* func = new llvm::Function(functype,llvm::GlobalValue::ExternalLinkage,"main",ir.module); | |
| 656 | |
| 657 llvm::BasicBlock* bb = new llvm::BasicBlock("entry",func); | |
| 658 | |
| 659 // call static ctors | |
| 117 | 660 llvm::Function* fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleCtor"); |
| 100 | 661 llvm::Instruction* apt = new llvm::CallInst(fn,"",bb); |
| 662 | |
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663 // run unit tests if -unittest is provided |
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664 if (global.params.useUnitTests) { |
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665 fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleUnitTests"); |
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666 llvm::Instruction* apt = new llvm::CallInst(fn,"",bb); |
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667 } |
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668 |
| 100 | 669 // call user main function |
| 670 const llvm::FunctionType* mainty = ir.mainFunc->getFunctionType(); | |
| 671 llvm::CallInst* call; | |
| 672 if (mainty->getNumParams() > 0) | |
| 673 { | |
| 674 // main with arguments | |
| 675 assert(mainty->getNumParams() == 1); | |
| 676 std::vector<llvm::Value*> args; | |
| 677 llvm::Function* mfn = LLVM_D_GetRuntimeFunction(ir.module,"_d_main_args"); | |
| 678 | |
| 679 llvm::Function::arg_iterator argi = func->arg_begin(); | |
| 680 args.push_back(argi++); | |
| 681 args.push_back(argi++); | |
| 682 | |
| 683 const llvm::Type* at = mainty->getParamType(0)->getContainedType(0); | |
| 684 llvm::Value* arr = new llvm::AllocaInst(at->getContainedType(1)->getContainedType(0), func->arg_begin(), "argstorage", apt); | |
| 685 llvm::Value* a = new llvm::AllocaInst(at, "argarray", apt); | |
| 686 llvm::Value* ptr = DtoGEPi(a,0,0,"tmp",bb); | |
| 687 llvm::Value* v = args[0]; | |
| 688 if (v->getType() != DtoSize_t()) | |
| 689 v = new llvm::ZExtInst(v, DtoSize_t(), "tmp", bb); | |
| 690 new llvm::StoreInst(v,ptr,bb); | |
| 691 ptr = DtoGEPi(a,0,1,"tmp",bb); | |
| 692 new llvm::StoreInst(arr,ptr,bb); | |
| 693 args.push_back(a); | |
| 694 new llvm::CallInst(mfn, args.begin(), args.end(), "", bb); | |
| 695 call = new llvm::CallInst(ir.mainFunc,a,"ret",bb); | |
| 696 } | |
| 697 else | |
| 698 { | |
| 699 // main with no arguments | |
| 700 call = new llvm::CallInst(ir.mainFunc,"ret",bb); | |
| 701 } | |
| 702 call->setCallingConv(ir.mainFunc->getCallingConv()); | |
| 703 | |
| 704 // call static dtors | |
| 117 | 705 fn = LLVM_D_GetRuntimeFunction(ir.module,"_moduleDtor"); |
| 100 | 706 new llvm::CallInst(fn,"",bb); |
| 707 | |
| 708 // return | |
| 709 new llvm::ReturnInst(call,bb); | |
| 710 } | |
| 711 | |
| 712 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 117 | 713 |
| 714 const llvm::FunctionType* DtoBaseFunctionType(FuncDeclaration* fdecl) | |
| 715 { | |
| 716 Dsymbol* parent = fdecl->toParent(); | |
| 717 ClassDeclaration* cd = parent->isClassDeclaration(); | |
| 718 assert(cd); | |
| 719 | |
| 720 FuncDeclaration* f = fdecl; | |
| 721 | |
| 722 while (cd) | |
| 723 { | |
| 724 ClassDeclaration* base = cd->baseClass; | |
| 725 if (!base) | |
| 726 break; | |
| 727 FuncDeclaration* f2 = base->findFunc(fdecl->ident, (TypeFunction*)fdecl->type); | |
| 728 if (f2) { | |
| 729 f = f2; | |
| 730 cd = base; | |
| 731 } | |
| 732 else | |
| 733 break; | |
| 734 } | |
| 735 | |
| 736 DtoResolveDsymbol(f); | |
| 737 return llvm::cast<llvm::FunctionType>(DtoType(f->type)); | |
| 738 } | |
| 739 | |
| 740 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 131 | 741 |
| 742 DValue* DtoArgument(Argument* fnarg, Expression* argexp) | |
| 743 { | |
| 744 Logger::println("DtoArgument"); | |
| 745 LOG_SCOPE; | |
| 746 | |
| 747 DValue* arg = argexp->toElem(gIR); | |
| 748 | |
| 749 // ref/out arg | |
| 750 if (fnarg && ((fnarg->storageClass & STCref) || (fnarg->storageClass & STCout))) | |
| 751 { | |
| 752 if (arg->isVar() || arg->isLRValue()) | |
| 753 arg = new DImValue(argexp->type, arg->getLVal(), false); | |
| 754 else | |
| 755 arg = new DImValue(argexp->type, arg->getRVal(), false); | |
| 756 } | |
| 757 // aggregate arg | |
| 758 else if (DtoIsPassedByRef(argexp->type)) | |
| 759 { | |
| 760 llvm::Value* alloc = new llvm::AllocaInst(DtoType(argexp->type), "tmpparam", gIR->topallocapoint()); | |
| 761 DVarValue* vv = new DVarValue(argexp->type, alloc, true); | |
| 762 DtoAssign(vv, arg); | |
| 763 arg = vv; | |
| 764 } | |
| 765 // normal arg (basic/value type) | |
| 766 else | |
| 767 { | |
| 768 // nothing to do | |
| 769 } | |
| 770 | |
| 771 return arg; | |
| 772 } | |
| 773 | |
| 774 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 775 | |
| 776 void DtoVariadicArgument(Expression* argexp, llvm::Value* dst) | |
| 777 { | |
| 778 Logger::println("DtoVariadicArgument"); | |
| 779 LOG_SCOPE; | |
| 780 DVarValue* vv = new DVarValue(argexp->type, dst, true); | |
| 781 DtoAssign(vv, argexp->toElem(gIR)); | |
| 782 } | |
| 783 | |
| 784 ////////////////////////////////////////////////////////////////////////////////////////// |