Mercurial > projects > ldc
annotate gen/functions.cpp @ 378:d8234836b40f
Get rid of runTimeHack and instead add proper argument info to the frontend
declatation.
author | Christian Kamm <kamm incasoftware de> |
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date | Tue, 22 Jul 2008 19:24:40 +0200 |
parents | 4d7495038ae8 |
children | d632801b15f0 |
rev | line source |
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100 | 1 #include "gen/llvm.h" |
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2 #include "llvm/Support/CFG.h" |
100 | 3 |
4 #include "mtype.h" | |
5 #include "aggregate.h" | |
6 #include "init.h" | |
7 #include "declaration.h" | |
8 #include "template.h" | |
9 #include "module.h" | |
10 #include "statement.h" | |
11 | |
12 #include "gen/irstate.h" | |
13 #include "gen/tollvm.h" | |
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14 #include "gen/llvmhelpers.h" |
100 | 15 #include "gen/runtime.h" |
16 #include "gen/arrays.h" | |
17 #include "gen/logger.h" | |
18 #include "gen/functions.h" | |
19 #include "gen/todebug.h" | |
20 #include "gen/classes.h" | |
131 | 21 #include "gen/dvalue.h" |
100 | 22 |
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23 const llvm::FunctionType* DtoFunctionType(Type* type, const LLType* thistype, bool ismain) |
100 | 24 { |
25 TypeFunction* f = (TypeFunction*)type; | |
26 assert(f != 0); | |
27 | |
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28 if (type->ir.type != NULL) { |
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29 return llvm::cast<llvm::FunctionType>(type->ir.type->get()); |
100 | 30 } |
31 | |
32 bool typesafeVararg = false; | |
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33 bool arrayVararg = false; |
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34 if (f->linkage == LINKd) |
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35 { |
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36 if (f->varargs == 1) |
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37 typesafeVararg = true; |
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38 else if (f->varargs == 2) |
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39 arrayVararg = true; |
100 | 40 } |
41 | |
42 // return value type | |
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43 const LLType* rettype; |
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44 const LLType* actualRettype; |
100 | 45 Type* rt = f->next; |
46 bool retinptr = false; | |
47 bool usesthis = false; | |
48 | |
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49 // parameter types |
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50 std::vector<const LLType*> paramvec; |
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51 |
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52 if (ismain) |
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53 { |
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54 rettype = LLType::Int32Ty; |
100 | 55 actualRettype = rettype; |
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56 if (Argument::dim(f->parameters) == 0) |
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57 { |
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58 const LLType* arrTy = DtoArrayType(LLType::Int8Ty); |
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59 const LLType* arrArrTy = DtoArrayType(arrTy); |
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60 paramvec.push_back(getPtrToType(arrArrTy)); |
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61 } |
100 | 62 } |
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63 else{ |
100 | 64 assert(rt); |
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65 Type* rtfin = DtoDType(rt); |
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66 if (DtoIsReturnedInArg(rt)) { |
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67 rettype = getPtrToType(DtoType(rt)); |
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68 actualRettype = LLType::VoidTy; |
100 | 69 f->llvmRetInPtr = retinptr = true; |
70 } | |
71 else { | |
72 rettype = DtoType(rt); | |
73 actualRettype = rettype; | |
74 } | |
75 } | |
76 | |
77 if (retinptr) { | |
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78 //Logger::cout() << "returning through pointer parameter: " << *rettype << '\n'; |
100 | 79 paramvec.push_back(rettype); |
80 } | |
81 | |
82 if (thistype) { | |
83 paramvec.push_back(thistype); | |
84 usesthis = true; | |
85 } | |
86 | |
87 if (typesafeVararg) { | |
88 ClassDeclaration* ti = Type::typeinfo; | |
336 | 89 ti->toObjFile(0); // TODO: multiobj |
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90 DtoForceConstInitDsymbol(ti); |
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91 assert(ti->ir.irStruct->constInit); |
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92 std::vector<const LLType*> types; |
100 | 93 types.push_back(DtoSize_t()); |
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94 types.push_back(getPtrToType(getPtrToType(ti->ir.irStruct->constInit->getType()))); |
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95 const LLType* t1 = llvm::StructType::get(types); |
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96 paramvec.push_back(getPtrToType(t1)); |
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97 paramvec.push_back(getPtrToType(LLType::Int8Ty)); |
100 | 98 } |
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99 else if (arrayVararg) |
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100 { |
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101 // do nothing? |
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102 } |
100 | 103 |
104 size_t n = Argument::dim(f->parameters); | |
105 | |
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106 int nbyval = 0; |
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107 |
100 | 108 for (int i=0; i < n; ++i) { |
109 Argument* arg = Argument::getNth(f->parameters, i); | |
110 // ensure scalar | |
111 Type* argT = DtoDType(arg->type); | |
112 assert(argT); | |
113 | |
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114 bool refOrOut = ((arg->storageClass & STCref) || (arg->storageClass & STCout)); |
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115 |
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116 const LLType* at = DtoType(argT); |
100 | 117 if (isaStruct(at)) { |
118 Logger::println("struct param"); | |
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119 paramvec.push_back(getPtrToType(at)); |
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120 arg->llvmByVal = !refOrOut; |
100 | 121 } |
122 else if (isaArray(at)) { | |
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123 // static array are passed by reference |
100 | 124 Logger::println("sarray param"); |
125 assert(argT->ty == Tsarray); | |
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126 paramvec.push_back(getPtrToType(at)); |
100 | 127 } |
128 else if (llvm::isa<llvm::OpaqueType>(at)) { | |
129 Logger::println("opaque param"); | |
130 assert(argT->ty == Tstruct || argT->ty == Tclass); | |
133
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131 paramvec.push_back(getPtrToType(at)); |
100 | 132 } |
133 else { | |
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134 if (refOrOut) { |
131 | 135 Logger::println("by ref param"); |
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136 at = getPtrToType(at); |
100 | 137 } |
138 else { | |
139 Logger::println("in param"); | |
140 } | |
141 paramvec.push_back(at); | |
142 } | |
217
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143 |
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144 // handle lazy args |
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145 if (arg->storageClass & STClazy) |
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146 { |
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147 Logger::cout() << "for lazy got: " << *paramvec.back() << '\n'; |
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148 TypeFunction *ltf = new TypeFunction(NULL, arg->type, 0, LINKd); |
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149 TypeDelegate *ltd = new TypeDelegate(ltf); |
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150 at = getPtrToType(DtoType(ltd)); |
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151 Logger::cout() << "lazy updated to: " << *at << '\n'; |
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152 paramvec.back() = at; |
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153 } |
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154 |
217
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155 if (arg->llvmByVal) |
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156 nbyval++; |
100 | 157 } |
158 | |
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159 //warning("set %d byval args for type: %s", nbyval, f->toChars()); |
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160 |
100 | 161 // construct function type |
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162 bool isvararg = !(typesafeVararg || arrayVararg) && f->varargs; |
100 | 163 llvm::FunctionType* functype = llvm::FunctionType::get(actualRettype, paramvec, isvararg); |
164 | |
165 f->llvmRetInPtr = retinptr; | |
166 f->llvmUsesThis = usesthis; | |
167 | |
217
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168 f->ir.type = new llvm::PATypeHolder(functype); |
100 | 169 |
170 return functype; | |
171 } | |
172 | |
173 ////////////////////////////////////////////////////////////////////////////////////////// | |
174 | |
175 static const llvm::FunctionType* DtoVaFunctionType(FuncDeclaration* fdecl) | |
176 { | |
102
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177 // type has already been resolved |
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178 if (fdecl->type->ir.type != 0) { |
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179 return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); |
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180 } |
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181 |
100 | 182 TypeFunction* f = (TypeFunction*)fdecl->type; |
183 assert(f != 0); | |
184 | |
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185 const llvm::PointerType* i8pty = getPtrToType(LLType::Int8Ty); |
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186 std::vector<const LLType*> args; |
100 | 187 |
188 if (fdecl->llvmInternal == LLVMva_start) { | |
189 args.push_back(i8pty); | |
190 } | |
191 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
192 size_t n = Argument::dim(f->parameters); | |
193 for (size_t i=0; i<n; ++i) { | |
194 args.push_back(i8pty); | |
195 } | |
196 } | |
197 else | |
198 assert(0); | |
199 | |
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200 const llvm::FunctionType* fty = llvm::FunctionType::get(LLType::VoidTy, args, false); |
100 | 201 |
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202 f->ir.type = new llvm::PATypeHolder(fty); |
100 | 203 |
204 return fty; | |
205 } | |
206 | |
207 ////////////////////////////////////////////////////////////////////////////////////////// | |
208 | |
209 const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl) | |
210 { | |
211 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
212 return DtoVaFunctionType(fdecl); | |
213 } | |
214 | |
215 // type has already been resolved | |
173
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216 if (fdecl->type->ir.type != 0) { |
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217 return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); |
100 | 218 } |
219 | |
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220 const LLType* thisty = NULL; |
100 | 221 if (fdecl->needThis()) { |
132 | 222 if (AggregateDeclaration* ad = fdecl->isMember2()) { |
223 Logger::println("isMember = this is: %s", ad->type->toChars()); | |
100 | 224 thisty = DtoType(ad->type); |
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225 //Logger::cout() << "this llvm type: " << *thisty << '\n'; |
102
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226 if (isaStruct(thisty) || (!gIR->structs.empty() && thisty == gIR->topstruct()->recty.get())) |
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227 thisty = getPtrToType(thisty); |
100 | 228 } |
132 | 229 else { |
230 Logger::println("chars: %s type: %s kind: %s", fdecl->toChars(), fdecl->type->toChars(), fdecl->kind()); | |
231 assert(0); | |
232 } | |
100 | 233 } |
234 else if (fdecl->isNested()) { | |
244
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235 thisty = getPtrToType(LLType::Int8Ty); |
100 | 236 } |
237 | |
238 const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, fdecl->isMain()); | |
239 | |
240 return functype; | |
241 } | |
242 | |
243 ////////////////////////////////////////////////////////////////////////////////////////// | |
244 | |
245 static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl) | |
246 { | |
247 TypeFunction* f = (TypeFunction*)DtoDType(fdecl->type); | |
248 const llvm::FunctionType* fty = DtoVaFunctionType(fdecl); | |
213
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249 LLConstant* fn = 0; |
100 | 250 |
251 if (fdecl->llvmInternal == LLVMva_start) { | |
252 fn = gIR->module->getOrInsertFunction("llvm.va_start", fty); | |
253 assert(fn); | |
254 } | |
255 else if (fdecl->llvmInternal == LLVMva_intrinsic) { | |
256 fn = gIR->module->getOrInsertFunction(fdecl->llvmInternal1, fty); | |
257 assert(fn); | |
258 } | |
259 else | |
260 assert(0); | |
261 | |
262 llvm::Function* func = llvm::dyn_cast<llvm::Function>(fn); | |
263 assert(func); | |
264 assert(func->isIntrinsic()); | |
173
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265 fdecl->ir.irFunc->func = func; |
100 | 266 return func; |
267 } | |
268 | |
269 ////////////////////////////////////////////////////////////////////////////////////////// | |
270 | |
102
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271 void DtoResolveFunction(FuncDeclaration* fdecl) |
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272 { |
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273 if (!global.params.useUnitTests && fdecl->isUnitTestDeclaration()) { |
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274 return; // ignore declaration completely |
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275 } |
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276 |
133
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277 // is imported and we don't have access? |
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278 if (fdecl->getModule() != gIR->dmodule) |
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279 { |
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280 if (fdecl->prot() == PROTprivate) |
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281 return; |
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282 } |
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283 |
173
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284 if (fdecl->ir.resolved) return; |
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285 fdecl->ir.resolved = true; |
102
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286 |
132 | 287 Logger::println("DtoResolveFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
102
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288 LOG_SCOPE; |
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289 |
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290 if (fdecl->parent) |
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291 if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance()) |
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292 { |
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293 TemplateDeclaration* tempdecl = tinst->tempdecl; |
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294 if (tempdecl->llvmInternal == LLVMva_arg) |
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295 { |
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296 Logger::println("magic va_arg found"); |
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297 fdecl->llvmInternal = LLVMva_arg; |
173
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298 fdecl->ir.declared = true; |
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299 fdecl->ir.initialized = true; |
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300 fdecl->ir.defined = true; |
102
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301 return; // this gets mapped to an instruction so a declaration makes no sence |
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302 } |
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303 else if (tempdecl->llvmInternal == LLVMva_start) |
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304 { |
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305 Logger::println("magic va_start found"); |
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306 fdecl->llvmInternal = LLVMva_start; |
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307 } |
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308 } |
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309 |
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310 DtoFunctionType(fdecl); |
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311 |
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312 // queue declaration |
113
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313 if (!fdecl->isAbstract()) |
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314 gIR->declareList.push_back(fdecl); |
102
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315 } |
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316 |
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317 ////////////////////////////////////////////////////////////////////////////////////////// |
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318 |
240
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319 static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclaration* fdecl) |
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320 { |
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321 assert(f->parameters); |
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322 |
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323 int llidx = 1; |
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324 if (f->llvmRetInPtr) ++llidx; |
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325 if (f->llvmUsesThis) ++llidx; |
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326 if (f->linkage == LINKd && f->varargs == 1) |
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327 llidx += 2; |
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328 |
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329 int funcNumArgs = func->getArgumentList().size(); |
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330 std::vector<llvm::ParamAttrsWithIndex> attrs; |
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331 int k = 0; |
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332 |
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333 int nbyval = 0; |
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334 |
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335 if (fdecl->isMain() && Argument::dim(f->parameters) == 0) |
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336 { |
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337 llvm::ParamAttrsWithIndex PAWI; |
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338 PAWI.Index = llidx; |
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339 PAWI.Attrs = llvm::ParamAttr::ByVal; |
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340 attrs.push_back(PAWI); |
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341 llidx++; |
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342 nbyval++; |
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343 } |
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344 |
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345 for (; llidx <= funcNumArgs && f->parameters->dim > k; ++llidx,++k) |
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346 { |
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347 Argument* fnarg = (Argument*)f->parameters->data[k]; |
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348 assert(fnarg); |
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349 if (fnarg->llvmByVal) |
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350 { |
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351 llvm::ParamAttrsWithIndex PAWI; |
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352 PAWI.Index = llidx; |
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353 PAWI.Attrs = llvm::ParamAttr::ByVal; |
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354 attrs.push_back(PAWI); |
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355 nbyval++; |
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356 } |
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357 } |
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358 |
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359 if (nbyval) { |
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360 llvm::PAListPtr palist = llvm::PAListPtr::get(attrs.begin(), attrs.end()); |
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361 func->setParamAttrs(palist); |
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362 } |
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363 } |
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364 |
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365 ////////////////////////////////////////////////////////////////////////////////////////// |
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366 |
100 | 367 void DtoDeclareFunction(FuncDeclaration* fdecl) |
368 { | |
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369 if (fdecl->ir.declared) return; |
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370 fdecl->ir.declared = true; |
102
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371 |
132 | 372 Logger::println("DtoDeclareFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); |
100 | 373 LOG_SCOPE; |
374 | |
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375 assert(!fdecl->isAbstract()); |
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376 |
121
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377 // intrinsic sanity check |
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378 if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) { |
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379 error(fdecl->loc, "intrinsics cannot have function bodies"); |
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380 fatal(); |
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381 } |
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382 |
240
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383 // get TypeFunction* |
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384 Type* t = DtoDType(fdecl->type); |
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385 TypeFunction* f = (TypeFunction*)t; |
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386 |
100 | 387 bool declareOnly = false; |
102
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388 bool templInst = fdecl->parent && DtoIsTemplateInstance(fdecl->parent); |
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389 if (!templInst && fdecl->getModule() != gIR->dmodule) |
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390 { |
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391 Logger::println("not template instance, and not in this module. declare only!"); |
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392 Logger::println("current module: %s", gIR->dmodule->ident->toChars()); |
378
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393 if(fdecl->getModule()) |
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394 Logger::println("func module: %s", fdecl->getModule()->ident->toChars()); |
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395 else |
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396 Logger::println("func not in a module, probably runtime"); |
102
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397 declareOnly = true; |
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398 } |
102
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399 else if (fdecl->llvmInternal == LLVMva_start) |
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400 declareOnly = true; |
100 | 401 |
173
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402 if (!fdecl->ir.irFunc) { |
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403 fdecl->ir.irFunc = new IrFunction(fdecl); |
100 | 404 } |
405 | |
406 // mangled name | |
407 char* mangled_name; | |
408 if (fdecl->llvmInternal == LLVMintrinsic) | |
409 mangled_name = fdecl->llvmInternal1; | |
410 else | |
411 mangled_name = fdecl->mangle(); | |
412 | |
413 llvm::Function* vafunc = 0; | |
414 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) { | |
415 vafunc = DtoDeclareVaFunction(fdecl); | |
416 } | |
417 | |
418 // construct function | |
419 const llvm::FunctionType* functype = DtoFunctionType(fdecl); | |
420 llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name); | |
421 if (!func) | |
205
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422 func = llvm::Function::Create(functype, DtoLinkage(fdecl), mangled_name, gIR->module); |
100 | 423 else |
424 assert(func->getFunctionType() == functype); | |
425 | |
426 // add func to IRFunc | |
173
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427 fdecl->ir.irFunc->func = func; |
100 | 428 |
429 // calling convention | |
430 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic) | |
431 func->setCallingConv(DtoCallingConv(f->linkage)); | |
149
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432 else // fall back to C, it should be the right thing to do |
132 | 433 func->setCallingConv(llvm::CallingConv::C); |
434 | |
173
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435 fdecl->ir.irFunc->func = func; |
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436 assert(llvm::isa<llvm::FunctionType>(f->ir.type->get())); |
100 | 437 |
217
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438 // parameter attributes |
240
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439 if (f->parameters) { |
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440 set_param_attrs(f, func, fdecl); |
217
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441 } |
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442 |
116
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443 // main |
100 | 444 if (fdecl->isMain()) { |
445 gIR->mainFunc = func; | |
446 } | |
447 | |
116
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448 // static ctor |
163
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449 if (fdecl->isStaticCtorDeclaration() && fdecl->getModule() == gIR->dmodule) { |
116
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450 gIR->ctors.push_back(fdecl); |
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451 } |
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452 // static dtor |
163
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453 else if (fdecl->isStaticDtorDeclaration() && fdecl->getModule() == gIR->dmodule) { |
116
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454 gIR->dtors.push_back(fdecl); |
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455 } |
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456 |
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457 // we never reference parameters of function prototypes |
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458 if (!declareOnly) |
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459 { |
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460 // name parameters |
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461 llvm::Function::arg_iterator iarg = func->arg_begin(); |
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462 int k = 0; |
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463 if (f->llvmRetInPtr) { |
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464 iarg->setName("retval"); |
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465 fdecl->ir.irFunc->retArg = iarg; |
162
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466 ++iarg; |
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467 } |
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468 if (f->llvmUsesThis) { |
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469 iarg->setName("this"); |
173
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470 fdecl->ir.irFunc->thisVar = iarg; |
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471 assert(fdecl->ir.irFunc->thisVar); |
162
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472 ++iarg; |
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473 } |
119
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474 |
162
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475 if (f->linkage == LINKd && f->varargs == 1) { |
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476 iarg->setName("_arguments"); |
173
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477 fdecl->ir.irFunc->_arguments = iarg; |
162
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478 ++iarg; |
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479 iarg->setName("_argptr"); |
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480 fdecl->ir.irFunc->_argptr = iarg; |
162
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481 ++iarg; |
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482 } |
119
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483 |
162
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484 for (; iarg != func->arg_end(); ++iarg) |
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485 { |
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486 if (fdecl->parameters && fdecl->parameters->dim > k) |
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487 { |
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488 Dsymbol* argsym = (Dsymbol*)fdecl->parameters->data[k++]; |
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489 VarDeclaration* argvd = argsym->isVarDeclaration(); |
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490 assert(argvd); |
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491 assert(!argvd->ir.irLocal); |
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492 argvd->ir.irLocal = new IrLocal(argvd); |
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493 argvd->ir.irLocal->value = iarg; |
162
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494 iarg->setName(argvd->ident->toChars()); |
100 | 495 } |
162
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496 else |
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497 { |
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498 iarg->setName("unnamed"); |
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499 } |
100 | 500 } |
501 } | |
502 | |
121
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503 if (fdecl->isUnitTestDeclaration()) |
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504 gIR->unitTests.push_back(fdecl); |
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505 |
100 | 506 if (!declareOnly) |
102
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507 gIR->defineList.push_back(fdecl); |
133
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508 else |
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509 assert(func->getLinkage() != llvm::GlobalValue::InternalLinkage); |
100 | 510 |
511 Logger::cout() << "func decl: " << *func << '\n'; | |
512 } | |
513 | |
514 ////////////////////////////////////////////////////////////////////////////////////////// | |
515 | |
516 void DtoDefineFunc(FuncDeclaration* fd) | |
517 { | |
173
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518 if (fd->ir.defined) return; |
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519 fd->ir.defined = true; |
102
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520 |
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521 assert(fd->ir.declared); |
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522 |
132 | 523 Logger::println("DtoDefineFunc(%s): %s", fd->toPrettyChars(), fd->loc.toChars()); |
102
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524 LOG_SCOPE; |
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525 |
100 | 526 // debug info |
527 if (global.params.symdebug) { | |
528 Module* mo = fd->getModule(); | |
250
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529 fd->ir.irFunc->dwarfSubProg = DtoDwarfSubProgram(fd); |
100 | 530 } |
531 | |
532 Type* t = DtoDType(fd->type); | |
533 TypeFunction* f = (TypeFunction*)t; | |
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534 assert(f->ir.type); |
100 | 535 |
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536 llvm::Function* func = fd->ir.irFunc->func; |
100 | 537 const llvm::FunctionType* functype = func->getFunctionType(); |
538 | |
539 // only members of the current module or template instances maybe be defined | |
244
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540 if (!(fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent))) |
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541 return; |
100 | 542 |
244
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543 // set module owner |
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544 fd->ir.DModule = gIR->dmodule; |
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545 |
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546 // is there a body? |
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547 if (fd->fbody == NULL) |
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548 return; |
100 | 549 |
244
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550 Logger::println("Doing function body for: %s", fd->toChars()); |
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551 assert(fd->ir.irFunc); |
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552 gIR->functions.push_back(fd->ir.irFunc); |
108
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553 |
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554 if (fd->isMain()) |
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555 gIR->emitMain = true; |
162
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556 |
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557 std::string entryname("entry_"); |
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558 entryname.append(fd->toPrettyChars()); |
162
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559 |
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560 llvm::BasicBlock* beginbb = llvm::BasicBlock::Create(entryname,func); |
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561 llvm::BasicBlock* endbb = llvm::BasicBlock::Create("endentry",func); |
100 | 562 |
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563 //assert(gIR->scopes.empty()); |
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564 gIR->scopes.push_back(IRScope(beginbb, endbb)); |
108
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565 |
244
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566 // create alloca point |
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567 llvm::Instruction* allocaPoint = new llvm::AllocaInst(LLType::Int32Ty, "alloca point", beginbb); |
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568 gIR->func()->allocapoint = allocaPoint; |
100 | 569 |
244
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570 // need result variable? (not nested) |
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571 if (fd->vresult && !fd->vresult->nestedref) { |
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572 Logger::println("non-nested vresult value"); |
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573 fd->vresult->ir.irLocal = new IrLocal(fd->vresult); |
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574 fd->vresult->ir.irLocal->value = new llvm::AllocaInst(DtoType(fd->vresult->type),"function_vresult",allocaPoint); |
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575 } |
100 | 576 |
254
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577 // give 'this' argument debug info (and storage) |
258
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578 if (fd->needThis() && global.params.symdebug) |
254
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579 { |
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580 LLValue** thisvar = &fd->ir.irFunc->thisVar; |
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581 assert(*thisvar); |
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582 LLValue* thismem = new llvm::AllocaInst((*thisvar)->getType(), "newthis", allocaPoint); |
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583 DtoDwarfLocalVariable(thismem, fd->vthis); |
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584 gIR->ir->CreateStore(*thisvar, thismem); |
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585 *thisvar = thismem; |
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586 } |
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587 |
244
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588 // give arguments storage |
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589 if (fd->parameters) |
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590 { |
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591 size_t n = fd->parameters->dim; |
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592 for (int i=0; i < n; ++i) |
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593 { |
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594 Dsymbol* argsym = (Dsymbol*)fd->parameters->data[i]; |
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595 VarDeclaration* vd = argsym->isVarDeclaration(); |
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596 assert(vd); |
100 | 597 |
258
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598 // FIXME: llvm seems to want an alloca/byval for debug info |
254
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599 if (!vd->needsStorage || vd->nestedref || vd->isRef() || vd->isOut()) |
244
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600 continue; |
254
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601 // debug info for normal aggr params seem to work fine |
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602 else if (DtoIsPassedByRef(vd->type)) |
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603 { |
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604 if (global.params.symdebug) |
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605 DtoDwarfLocalVariable(vd->ir.getIrValue(), vd); |
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606 continue; |
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607 } |
100 | 608 |
244
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609 LLValue* a = vd->ir.irLocal->value; |
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610 assert(a); |
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611 std::string s(a->getName()); |
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612 Logger::println("giving argument '%s' storage", s.c_str()); |
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613 s.append("_storage"); |
225
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[svn r241] Fixed missing terminator for void main() with inline asm block.
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|
614 |
244
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615 LLValue* v = new llvm::AllocaInst(a->getType(),s,allocaPoint); |
245
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616 |
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617 if (global.params.symdebug) |
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618 DtoDwarfLocalVariable(v, vd); |
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619 |
244
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620 gIR->ir->CreateStore(a,v); |
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621 vd->ir.irLocal->value = v; |
100 | 622 } |
623 } | |
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624 |
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625 // debug info |
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626 if (global.params.symdebug) DtoDwarfFuncStart(fd); |
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627 |
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628 LLValue* parentNested = NULL; |
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629 if (FuncDeclaration* fd2 = fd->toParent2()->isFuncDeclaration()) { |
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630 if (!fd->isStatic()) // huh? |
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631 parentNested = fd2->ir.irFunc->nestedVar; |
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632 } |
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633 |
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634 // need result variable? (nested) |
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635 if (fd->vresult && fd->vresult->nestedref) { |
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636 Logger::println("nested vresult value: %s", fd->vresult->toChars()); |
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637 fd->nestedVars.insert(fd->vresult); |
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638 } |
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639 |
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640 // construct nested variables struct |
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641 if (!fd->nestedVars.empty() || parentNested) { |
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642 std::vector<const LLType*> nestTypes; |
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643 int j = 0; |
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644 if (parentNested) { |
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645 nestTypes.push_back(parentNested->getType()); |
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646 j++; |
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647 } |
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648 for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i) { |
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649 VarDeclaration* vd = *i; |
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650 Logger::println("referenced nested variable %s", vd->toChars()); |
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651 if (!vd->ir.irLocal) |
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652 vd->ir.irLocal = new IrLocal(vd); |
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653 vd->ir.irLocal->nestedIndex = j++; |
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654 if (vd->isParameter()) { |
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655 if (!vd->ir.irLocal->value) { |
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656 assert(vd == fd->vthis); |
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657 vd->ir.irLocal->value = fd->ir.irFunc->thisVar; |
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658 } |
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659 assert(vd->ir.irLocal->value); |
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660 nestTypes.push_back(vd->ir.irLocal->value->getType()); |
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661 } |
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662 else { |
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663 nestTypes.push_back(DtoType(vd->type)); |
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664 } |
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665 } |
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666 const llvm::StructType* nestSType = llvm::StructType::get(nestTypes); |
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667 Logger::cout() << "nested var struct has type:" << *nestSType << '\n'; |
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668 fd->ir.irFunc->nestedVar = new llvm::AllocaInst(nestSType,"nestedvars",allocaPoint); |
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669 if (parentNested) { |
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670 assert(fd->ir.irFunc->thisVar); |
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671 LLValue* ptr = gIR->ir->CreateBitCast(fd->ir.irFunc->thisVar, parentNested->getType(), "tmp"); |
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672 gIR->ir->CreateStore(ptr, DtoGEPi(fd->ir.irFunc->nestedVar, 0,0, "tmp")); |
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673 } |
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674 for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i) { |
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675 VarDeclaration* vd = *i; |
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676 if (vd->isParameter()) { |
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677 assert(vd->ir.irLocal); |
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678 gIR->ir->CreateStore(vd->ir.irLocal->value, DtoGEPi(fd->ir.irFunc->nestedVar, 0, vd->ir.irLocal->nestedIndex, "tmp")); |
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679 vd->ir.irLocal->value = fd->ir.irFunc->nestedVar; |
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680 } |
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681 } |
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682 } |
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683 |
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684 // copy _argptr to a memory location |
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685 if (f->linkage == LINKd && f->varargs == 1) |
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686 { |
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687 LLValue* argptrmem = new llvm::AllocaInst(fd->ir.irFunc->_argptr->getType(), "_argptrmem", gIR->topallocapoint()); |
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688 new llvm::StoreInst(fd->ir.irFunc->_argptr, argptrmem, gIR->scopebb()); |
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689 fd->ir.irFunc->_argptr = argptrmem; |
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690 } |
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691 |
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692 // output function body |
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693 fd->fbody->toIR(gIR); |
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694 |
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695 // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement |
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696 // in automatically, so we do it here. |
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697 if (!fd->isMain()) { |
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698 if (!gIR->scopereturned()) { |
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699 // pass the previous block into this block |
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700 if (global.params.symdebug) DtoDwarfFuncEnd(fd); |
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701 if (func->getReturnType() == LLType::VoidTy) { |
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702 llvm::ReturnInst::Create(gIR->scopebb()); |
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703 } |
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704 else { |
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705 llvm::ReturnInst::Create(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb()); |
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706 } |
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707 } |
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708 } |
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709 |
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710 // erase alloca point |
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711 allocaPoint->eraseFromParent(); |
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712 allocaPoint = 0; |
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713 gIR->func()->allocapoint = 0; |
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714 |
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715 gIR->scopes.pop_back(); |
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716 |
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717 // get rid of the endentry block, it's never used |
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718 assert(!func->getBasicBlockList().empty()); |
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719 func->getBasicBlockList().pop_back(); |
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720 |
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721 // if the last block is empty now, it must be unreachable or it's a bug somewhere else |
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722 // would be nice to figure out how to assert that this is correct |
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723 llvm::BasicBlock* lastbb = &func->getBasicBlockList().back(); |
328
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724 if (lastbb->empty()) |
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725 { |
262
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726 new llvm::UnreachableInst(lastbb); |
244
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727 } |
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728 |
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729 // if the last block is not terminated we return a null value or void |
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730 // for some unknown reason this is needed when a void main() has a inline asm block ... |
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731 // this should be harmless for well formed code! |
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732 lastbb = &func->getBasicBlockList().back(); |
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733 if (!lastbb->getTerminator()) |
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734 { |
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735 Logger::println("adding missing return statement"); |
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736 if (func->getReturnType() == LLType::VoidTy) |
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737 llvm::ReturnInst::Create(lastbb); |
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738 else |
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739 llvm::ReturnInst::Create(llvm::Constant::getNullValue(func->getReturnType()), lastbb); |
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740 } |
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741 |
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742 gIR->functions.pop_back(); |
100 | 743 } |
744 | |
745 ////////////////////////////////////////////////////////////////////////////////////////// | |
746 | |
117 | 747 const llvm::FunctionType* DtoBaseFunctionType(FuncDeclaration* fdecl) |
748 { | |
749 Dsymbol* parent = fdecl->toParent(); | |
750 ClassDeclaration* cd = parent->isClassDeclaration(); | |
751 assert(cd); | |
752 | |
753 FuncDeclaration* f = fdecl; | |
754 | |
755 while (cd) | |
756 { | |
757 ClassDeclaration* base = cd->baseClass; | |
758 if (!base) | |
759 break; | |
760 FuncDeclaration* f2 = base->findFunc(fdecl->ident, (TypeFunction*)fdecl->type); | |
761 if (f2) { | |
762 f = f2; | |
763 cd = base; | |
764 } | |
765 else | |
766 break; | |
767 } | |
768 | |
769 DtoResolveDsymbol(f); | |
770 return llvm::cast<llvm::FunctionType>(DtoType(f->type)); | |
771 } | |
772 | |
773 ////////////////////////////////////////////////////////////////////////////////////////// | |
131 | 774 |
775 DValue* DtoArgument(Argument* fnarg, Expression* argexp) | |
776 { | |
777 Logger::println("DtoArgument"); | |
778 LOG_SCOPE; | |
779 | |
780 DValue* arg = argexp->toElem(gIR); | |
781 | |
782 // ref/out arg | |
783 if (fnarg && ((fnarg->storageClass & STCref) || (fnarg->storageClass & STCout))) | |
784 { | |
785 if (arg->isVar() || arg->isLRValue()) | |
786 arg = new DImValue(argexp->type, arg->getLVal(), false); | |
787 else | |
788 arg = new DImValue(argexp->type, arg->getRVal(), false); | |
789 } | |
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790 // byval arg, but expr has no storage yet |
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791 else if (DtoIsPassedByRef(argexp->type) && (arg->isSlice() || arg->isComplex() || arg->isNull())) |
131 | 792 { |
213
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793 LLValue* alloc = new llvm::AllocaInst(DtoType(argexp->type), "tmpparam", gIR->topallocapoint()); |
131 | 794 DVarValue* vv = new DVarValue(argexp->type, alloc, true); |
795 DtoAssign(vv, arg); | |
796 arg = vv; | |
797 } | |
798 | |
799 return arg; | |
800 } | |
801 | |
802 ////////////////////////////////////////////////////////////////////////////////////////// | |
803 | |
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804 void DtoVariadicArgument(Expression* argexp, LLValue* dst) |
131 | 805 { |
806 Logger::println("DtoVariadicArgument"); | |
807 LOG_SCOPE; | |
347
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808 DVarValue vv(argexp->type, dst, true); |
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809 DtoAssign(&vv, argexp->toElem(gIR)); |
131 | 810 } |
811 | |
812 ////////////////////////////////////////////////////////////////////////////////////////// |