100
|
1 #include "gen/llvm.h"
|
|
2
|
|
3 #include "mtype.h"
|
|
4 #include "aggregate.h"
|
|
5 #include "init.h"
|
|
6 #include "declaration.h"
|
|
7 #include "template.h"
|
|
8 #include "module.h"
|
|
9 #include "statement.h"
|
|
10
|
|
11 #include "gen/irstate.h"
|
|
12 #include "gen/tollvm.h"
|
|
13 #include "gen/runtime.h"
|
|
14 #include "gen/arrays.h"
|
|
15 #include "gen/logger.h"
|
|
16 #include "gen/functions.h"
|
|
17 #include "gen/todebug.h"
|
|
18 #include "gen/classes.h"
|
|
19
|
|
20 const llvm::FunctionType* DtoFunctionType(Type* type, const llvm::Type* thistype, bool ismain)
|
|
21 {
|
|
22 TypeFunction* f = (TypeFunction*)type;
|
|
23 assert(f != 0);
|
|
24
|
|
25 if (type->llvmType != NULL) {
|
|
26 return llvm::cast<llvm::FunctionType>(type->llvmType->get());
|
|
27 }
|
|
28
|
|
29 bool typesafeVararg = false;
|
|
30 if (f->linkage == LINKd && f->varargs == 1) {
|
|
31 typesafeVararg = true;
|
|
32 }
|
|
33
|
|
34 // return value type
|
|
35 const llvm::Type* rettype;
|
|
36 const llvm::Type* actualRettype;
|
|
37 Type* rt = f->next;
|
|
38 bool retinptr = false;
|
|
39 bool usesthis = false;
|
|
40
|
|
41 if (ismain) {
|
|
42 rettype = llvm::Type::Int32Ty;
|
|
43 actualRettype = rettype;
|
|
44 }
|
|
45 else {
|
|
46 assert(rt);
|
|
47 if (DtoIsPassedByRef(rt)) {
|
|
48 rettype = llvm::PointerType::get(DtoType(rt));
|
|
49 actualRettype = llvm::Type::VoidTy;
|
|
50 f->llvmRetInPtr = retinptr = true;
|
|
51 }
|
|
52 else {
|
|
53 rettype = DtoType(rt);
|
|
54 actualRettype = rettype;
|
|
55 }
|
|
56 }
|
|
57
|
|
58 // parameter types
|
|
59 std::vector<const llvm::Type*> paramvec;
|
|
60
|
|
61 if (retinptr) {
|
|
62 Logger::cout() << "returning through pointer parameter: " << *rettype << '\n';
|
|
63 paramvec.push_back(rettype);
|
|
64 }
|
|
65
|
|
66 if (thistype) {
|
|
67 paramvec.push_back(thistype);
|
|
68 usesthis = true;
|
|
69 }
|
|
70
|
|
71 if (typesafeVararg) {
|
|
72 ClassDeclaration* ti = Type::typeinfo;
|
|
73 ti->toObjFile();
|
|
74 DtoConstInitClass(ti);
|
|
75 assert(ti->llvmInitZ);
|
|
76 std::vector<const llvm::Type*> types;
|
|
77 types.push_back(DtoSize_t());
|
|
78 types.push_back(llvm::PointerType::get(llvm::PointerType::get(ti->llvmInitZ->getType())));
|
|
79 const llvm::Type* t1 = llvm::StructType::get(types);
|
|
80 paramvec.push_back(llvm::PointerType::get(t1));
|
|
81 paramvec.push_back(llvm::PointerType::get(llvm::Type::Int8Ty));
|
|
82 }
|
|
83
|
|
84 size_t n = Argument::dim(f->parameters);
|
|
85
|
|
86 for (int i=0; i < n; ++i) {
|
|
87 Argument* arg = Argument::getNth(f->parameters, i);
|
|
88 // ensure scalar
|
|
89 Type* argT = DtoDType(arg->type);
|
|
90 assert(argT);
|
|
91
|
|
92 if ((arg->storageClass & STCref) || (arg->storageClass & STCout)) {
|
|
93 //assert(arg->vardecl);
|
|
94 //arg->vardecl->refparam = true;
|
|
95 }
|
|
96 else
|
|
97 arg->llvmCopy = true;
|
|
98
|
|
99 const llvm::Type* at = DtoType(argT);
|
|
100 if (isaStruct(at)) {
|
|
101 Logger::println("struct param");
|
|
102 paramvec.push_back(llvm::PointerType::get(at));
|
|
103 }
|
|
104 else if (isaArray(at)) {
|
|
105 Logger::println("sarray param");
|
|
106 assert(argT->ty == Tsarray);
|
|
107 //paramvec.push_back(llvm::PointerType::get(at->getContainedType(0)));
|
|
108 paramvec.push_back(llvm::PointerType::get(at));
|
|
109 }
|
|
110 else if (llvm::isa<llvm::OpaqueType>(at)) {
|
|
111 Logger::println("opaque param");
|
|
112 assert(argT->ty == Tstruct || argT->ty == Tclass);
|
|
113 paramvec.push_back(llvm::PointerType::get(at));
|
|
114 }
|
|
115 else {
|
|
116 if (!arg->llvmCopy) {
|
|
117 Logger::println("ref param");
|
|
118 at = llvm::PointerType::get(at);
|
|
119 }
|
|
120 else {
|
|
121 Logger::println("in param");
|
|
122 }
|
|
123 paramvec.push_back(at);
|
|
124 }
|
|
125 }
|
|
126
|
|
127 // construct function type
|
|
128 bool isvararg = !typesafeVararg && f->varargs;
|
|
129 llvm::FunctionType* functype = llvm::FunctionType::get(actualRettype, paramvec, isvararg);
|
|
130
|
|
131 f->llvmRetInPtr = retinptr;
|
|
132 f->llvmUsesThis = usesthis;
|
|
133
|
|
134 if (!f->llvmType)
|
|
135 f->llvmType = new llvm::PATypeHolder(functype);
|
|
136 else
|
|
137 assert(functype == f->llvmType->get());
|
|
138
|
|
139 return functype;
|
|
140 }
|
|
141
|
|
142 //////////////////////////////////////////////////////////////////////////////////////////
|
|
143
|
|
144 static const llvm::FunctionType* DtoVaFunctionType(FuncDeclaration* fdecl)
|
|
145 {
|
|
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
|
|
166 if (!f->llvmType)
|
|
167 f->llvmType = new llvm::PATypeHolder(fty);
|
|
168 else
|
|
169 assert(fty == f->llvmType->get());
|
|
170
|
|
171 return fty;
|
|
172 }
|
|
173
|
|
174 //////////////////////////////////////////////////////////////////////////////////////////
|
|
175
|
|
176 const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl)
|
|
177 {
|
|
178 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) {
|
|
179 return DtoVaFunctionType(fdecl);
|
|
180 }
|
|
181
|
|
182 // type has already been resolved
|
|
183 if (fdecl->type->llvmType != 0) {
|
|
184 return llvm::cast<llvm::FunctionType>(fdecl->type->llvmType->get());
|
|
185 }
|
|
186
|
|
187 const llvm::Type* thisty = NULL;
|
|
188 if (fdecl->needThis()) {
|
|
189 if (AggregateDeclaration* ad = fdecl->isMember()) {
|
|
190 Logger::print("isMember = this is: %s\n", ad->type->toChars());
|
|
191 thisty = DtoType(ad->type);
|
|
192 Logger::cout() << "this llvm type: " << *thisty << '\n';
|
|
193 if (isaStruct(thisty) || thisty == gIR->topstruct()->recty.get())
|
|
194 thisty = llvm::PointerType::get(thisty);
|
|
195 }
|
|
196 else
|
|
197 assert(0);
|
|
198 }
|
|
199 else if (fdecl->isNested()) {
|
|
200 thisty = llvm::PointerType::get(llvm::Type::Int8Ty);
|
|
201 }
|
|
202
|
|
203 const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, fdecl->isMain());
|
|
204
|
|
205 return functype;
|
|
206 }
|
|
207
|
|
208 //////////////////////////////////////////////////////////////////////////////////////////
|
|
209
|
|
210 static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl)
|
|
211 {
|
|
212 TypeFunction* f = (TypeFunction*)DtoDType(fdecl->type);
|
|
213 const llvm::FunctionType* fty = DtoVaFunctionType(fdecl);
|
|
214 llvm::Constant* fn = 0;
|
|
215
|
|
216 if (fdecl->llvmInternal == LLVMva_start) {
|
|
217 fn = gIR->module->getOrInsertFunction("llvm.va_start", fty);
|
|
218 assert(fn);
|
|
219 }
|
|
220 else if (fdecl->llvmInternal == LLVMva_intrinsic) {
|
|
221 fn = gIR->module->getOrInsertFunction(fdecl->llvmInternal1, fty);
|
|
222 assert(fn);
|
|
223 }
|
|
224 else
|
|
225 assert(0);
|
|
226
|
|
227 llvm::Function* func = llvm::dyn_cast<llvm::Function>(fn);
|
|
228 assert(func);
|
|
229 assert(func->isIntrinsic());
|
|
230 fdecl->llvmValue = func;
|
|
231 return func;
|
|
232 }
|
|
233
|
|
234 //////////////////////////////////////////////////////////////////////////////////////////
|
|
235
|
|
236 void DtoDeclareFunction(FuncDeclaration* fdecl)
|
|
237 {
|
|
238 Logger::println("DtoDeclareFunction(%s)", fdecl->toPrettyChars());
|
|
239 LOG_SCOPE;
|
|
240
|
|
241 if (fdecl->llvmRunTimeHack) {
|
|
242 Logger::println("runtime hack func chars: %s", fdecl->toChars());
|
|
243 if (!fdecl->llvmValue)
|
|
244 fdecl->llvmValue = LLVM_D_GetRuntimeFunction(gIR->module, fdecl->toChars());
|
|
245 return;
|
|
246 }
|
|
247
|
|
248 if (fdecl->isUnitTestDeclaration()) {
|
|
249 Logger::attention("ignoring unittest declaration: %s", fdecl->toChars());
|
|
250 return;
|
|
251 }
|
|
252
|
|
253 bool declareOnly = false;
|
|
254 if (fdecl->parent)
|
|
255 {
|
|
256 if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance())
|
|
257 {
|
|
258 TemplateDeclaration* tempdecl = tinst->tempdecl;
|
|
259 if (tempdecl->llvmInternal == LLVMva_start)
|
|
260 {
|
|
261 Logger::println("magic va_start found");
|
|
262 fdecl->llvmInternal = LLVMva_start;
|
|
263 declareOnly = true;
|
|
264 }
|
|
265 else if (tempdecl->llvmInternal == LLVMva_arg)
|
|
266 {
|
|
267 Logger::println("magic va_arg found");
|
|
268 fdecl->llvmInternal = LLVMva_arg;
|
|
269 return;
|
|
270 }
|
|
271 }
|
|
272 }
|
|
273
|
|
274 if (fdecl->llvmTouched) return;
|
|
275 fdecl->llvmTouched = true;
|
|
276
|
|
277 if (!fdecl->llvmIRFunc) {
|
|
278 fdecl->llvmIRFunc = new IRFunction(fdecl);
|
|
279 }
|
|
280
|
|
281 // mangled name
|
|
282 char* mangled_name;
|
|
283 if (fdecl->llvmInternal == LLVMintrinsic)
|
|
284 mangled_name = fdecl->llvmInternal1;
|
|
285 else
|
|
286 mangled_name = fdecl->mangle();
|
|
287
|
|
288 // unit test special handling
|
|
289 if (fdecl->isUnitTestDeclaration())
|
|
290 {
|
|
291 assert(0 && "no unittests yet");
|
|
292 /*const llvm::FunctionType* fnty = llvm::FunctionType::get(llvm::Type::VoidTy, std::vector<const llvm::Type*>(), false);
|
|
293 // make the function
|
|
294 llvm::Function* func = gIR->module->getFunction(mangled_name);
|
|
295 if (func == 0)
|
|
296 func = new llvm::Function(fnty,llvm::GlobalValue::InternalLinkage,mangled_name,gIR->module);
|
|
297 func->setCallingConv(llvm::CallingConv::Fast);
|
|
298 fdecl->llvmValue = func;
|
|
299 return func;
|
|
300 */
|
|
301 }
|
|
302
|
|
303 if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) {
|
|
304 error("intrinsics cannot have function bodies");
|
|
305 fatal();
|
|
306 }
|
|
307
|
|
308 llvm::Function* vafunc = 0;
|
|
309 if ((fdecl->llvmInternal == LLVMva_start) || (fdecl->llvmInternal == LLVMva_intrinsic)) {
|
|
310 vafunc = DtoDeclareVaFunction(fdecl);
|
|
311 }
|
|
312
|
|
313 Type* t = DtoDType(fdecl->type);
|
|
314 TypeFunction* f = (TypeFunction*)t;
|
|
315
|
|
316 // construct function
|
|
317 const llvm::FunctionType* functype = DtoFunctionType(fdecl);
|
|
318 llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name);
|
|
319 if (!func)
|
|
320 func = new llvm::Function(functype, DtoLinkage(fdecl->protection, fdecl->storage_class), mangled_name, gIR->module);
|
|
321 else
|
|
322 assert(func->getFunctionType() == functype);
|
|
323
|
|
324 // add func to IRFunc
|
|
325 fdecl->llvmIRFunc->func = func;
|
|
326
|
|
327 // calling convention
|
|
328 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic)
|
|
329 func->setCallingConv(DtoCallingConv(f->linkage));
|
|
330
|
|
331 // template instances should have weak linkage
|
|
332 if (!vafunc && fdecl->llvmInternal != LLVMintrinsic && fdecl->parent && DtoIsTemplateInstance(fdecl->parent))
|
|
333 func->setLinkage(llvm::GlobalValue::WeakLinkage);
|
|
334
|
|
335 fdecl->llvmValue = func;
|
|
336 assert(llvm::isa<llvm::FunctionType>(f->llvmType->get()));
|
|
337
|
|
338 if (fdecl->isMain()) {
|
|
339 gIR->mainFunc = func;
|
|
340 }
|
|
341
|
|
342 // name parameters
|
|
343 llvm::Function::arg_iterator iarg = func->arg_begin();
|
|
344 int k = 0;
|
|
345 if (f->llvmRetInPtr) {
|
|
346 iarg->setName("retval");
|
|
347 f->llvmRetArg = iarg;
|
|
348 ++iarg;
|
|
349 }
|
|
350 if (f->llvmUsesThis) {
|
|
351 iarg->setName("this");
|
|
352 ++iarg;
|
|
353 }
|
|
354 int varargs = -1;
|
|
355 if (f->linkage == LINKd && f->varargs == 1)
|
|
356 varargs = 0;
|
|
357 for (; iarg != func->arg_end(); ++iarg)
|
|
358 {
|
|
359 Argument* arg = Argument::getNth(f->parameters, k++);
|
|
360 //arg->llvmValue = iarg;
|
|
361 //Logger::println("identifier: '%s' %p\n", arg->ident->toChars(), arg->ident);
|
|
362 if (arg && arg->ident != 0) {
|
|
363 if (arg->vardecl) {
|
|
364 arg->vardecl->llvmValue = iarg;
|
|
365 }
|
|
366 iarg->setName(arg->ident->toChars());
|
|
367 }
|
|
368 else if (!arg && varargs >= 0) {
|
|
369 if (varargs == 0) {
|
|
370 iarg->setName("_arguments");
|
|
371 fdecl->llvmArguments = iarg;
|
|
372 }
|
|
373 else if (varargs == 1) {
|
|
374 iarg->setName("_argptr");
|
|
375 fdecl->llvmArgPtr = iarg;
|
|
376 }
|
|
377 else
|
|
378 assert(0);
|
|
379 varargs++;
|
|
380 }
|
|
381 else {
|
|
382 iarg->setName("unnamed");
|
|
383 }
|
|
384 }
|
|
385
|
|
386 if (!declareOnly)
|
|
387 gIR->defineQueue.push_back(fdecl);
|
|
388
|
|
389 Logger::cout() << "func decl: " << *func << '\n';
|
|
390 }
|
|
391
|
|
392 //////////////////////////////////////////////////////////////////////////////////////////
|
|
393
|
|
394 // TODO split this monster up
|
|
395 void DtoDefineFunc(FuncDeclaration* fd)
|
|
396 {
|
|
397 // debug info
|
|
398 if (global.params.symdebug) {
|
|
399 Module* mo = fd->getModule();
|
|
400 if (!mo->llvmCompileUnit) {
|
|
401 mo->llvmCompileUnit = DtoDwarfCompileUnit(mo,false);
|
|
402 }
|
|
403 fd->llvmDwarfSubProgram = DtoDwarfSubProgram(fd, mo->llvmCompileUnit);
|
|
404 }
|
|
405
|
|
406 Type* t = DtoDType(fd->type);
|
|
407 TypeFunction* f = (TypeFunction*)t;
|
|
408
|
|
409 assert(f->llvmType);
|
|
410 llvm::Function* func = fd->llvmIRFunc->func;
|
|
411 const llvm::FunctionType* functype = func->getFunctionType();
|
|
412
|
|
413 // only members of the current module or template instances maybe be defined
|
|
414 if (fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent))
|
|
415 {
|
|
416 fd->llvmDModule = gIR->dmodule;
|
|
417
|
|
418 // handle static constructor / destructor
|
|
419 if (fd->isStaticCtorDeclaration() || fd->isStaticDtorDeclaration()) {
|
|
420 const llvm::ArrayType* sctor_type = llvm::ArrayType::get(llvm::PointerType::get(functype),1);
|
|
421 //Logger::cout() << "static ctor type: " << *sctor_type << '\n';
|
|
422
|
|
423 llvm::Constant* sctor_func = llvm::cast<llvm::Constant>(fd->llvmValue);
|
|
424 //Logger::cout() << "static ctor func: " << *sctor_func << '\n';
|
|
425
|
|
426 llvm::Constant* sctor_init = llvm::ConstantArray::get(sctor_type,&sctor_func,1);
|
|
427
|
|
428 //Logger::cout() << "static ctor init: " << *sctor_init << '\n';
|
|
429
|
|
430 // output the llvm.global_ctors array
|
|
431 const char* varname = fd->isStaticCtorDeclaration() ? "_d_module_ctor_array" : "_d_module_dtor_array";
|
|
432 llvm::GlobalVariable* sctor_arr = new llvm::GlobalVariable(sctor_type, false, llvm::GlobalValue::AppendingLinkage, sctor_init, varname, gIR->module);
|
|
433 }
|
|
434
|
|
435 // function definition
|
|
436 if (fd->fbody != 0)
|
|
437 {
|
|
438 Logger::println("Doing function body for: %s", fd->toChars());
|
|
439 assert(fd->llvmIRFunc);
|
|
440 gIR->functions.push_back(fd->llvmIRFunc);
|
|
441
|
|
442 // this handling
|
|
443 if (f->llvmUsesThis) {
|
|
444 Logger::println("uses this");
|
|
445 if (f->llvmRetInPtr)
|
|
446 fd->llvmThisVar = ++func->arg_begin();
|
|
447 else
|
|
448 fd->llvmThisVar = func->arg_begin();
|
|
449 assert(fd->llvmThisVar != 0);
|
|
450 }
|
|
451
|
|
452 if (fd->isMain())
|
|
453 gIR->emitMain = true;
|
|
454
|
|
455 llvm::BasicBlock* beginbb = new llvm::BasicBlock("entry",func);
|
|
456 llvm::BasicBlock* endbb = new llvm::BasicBlock("endentry",func);
|
|
457
|
|
458 //assert(gIR->scopes.empty());
|
|
459 gIR->scopes.push_back(IRScope(beginbb, endbb));
|
|
460
|
|
461 // create alloca point
|
|
462 f->llvmAllocaPoint = new llvm::BitCastInst(llvm::ConstantInt::get(llvm::Type::Int32Ty,0,false),llvm::Type::Int32Ty,"alloca point",gIR->scopebb());
|
|
463 gIR->func()->allocapoint = f->llvmAllocaPoint;
|
|
464
|
|
465 // give arguments storage
|
|
466 size_t n = Argument::dim(f->parameters);
|
|
467 for (int i=0; i < n; ++i) {
|
|
468 Argument* arg = Argument::getNth(f->parameters, i);
|
|
469 if (arg && arg->vardecl) {
|
|
470 VarDeclaration* vd = arg->vardecl;
|
|
471 if (!vd->llvmNeedsStorage || vd->nestedref || vd->isRef() || vd->isOut() || DtoIsPassedByRef(vd->type))
|
|
472 continue;
|
|
473 llvm::Value* a = vd->llvmValue;
|
|
474 assert(a);
|
|
475 std::string s(a->getName());
|
|
476 Logger::println("giving argument '%s' storage", s.c_str());
|
|
477 s.append("_storage");
|
|
478 llvm::Value* v = new llvm::AllocaInst(a->getType(),s,f->llvmAllocaPoint);
|
|
479 gIR->ir->CreateStore(a,v);
|
|
480 vd->llvmValue = v;
|
|
481 }
|
|
482 else {
|
|
483 Logger::attention("some unknown argument: %s", arg ? arg->toChars() : 0);
|
|
484 }
|
|
485 }
|
|
486
|
|
487 // debug info
|
|
488 if (global.params.symdebug) DtoDwarfFuncStart(fd);
|
|
489
|
|
490 llvm::Value* parentNested = NULL;
|
|
491 if (FuncDeclaration* fd2 = fd->toParent()->isFuncDeclaration()) {
|
|
492 parentNested = fd2->llvmNested;
|
|
493 }
|
|
494
|
|
495 // construct nested variables struct
|
|
496 if (!fd->llvmNestedVars.empty() || parentNested) {
|
|
497 std::vector<const llvm::Type*> nestTypes;
|
|
498 int j = 0;
|
|
499 if (parentNested) {
|
|
500 nestTypes.push_back(parentNested->getType());
|
|
501 j++;
|
|
502 }
|
|
503 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) {
|
|
504 VarDeclaration* vd = *i;
|
|
505 vd->llvmNestedIndex = j++;
|
|
506 if (vd->isParameter()) {
|
|
507 assert(vd->llvmValue);
|
|
508 nestTypes.push_back(vd->llvmValue->getType());
|
|
509 }
|
|
510 else {
|
|
511 nestTypes.push_back(DtoType(vd->type));
|
|
512 }
|
|
513 }
|
|
514 const llvm::StructType* nestSType = llvm::StructType::get(nestTypes);
|
|
515 Logger::cout() << "nested var struct has type:" << '\n' << *nestSType;
|
|
516 fd->llvmNested = new llvm::AllocaInst(nestSType,"nestedvars",f->llvmAllocaPoint);
|
|
517 if (parentNested) {
|
|
518 assert(fd->llvmThisVar);
|
|
519 llvm::Value* ptr = gIR->ir->CreateBitCast(fd->llvmThisVar, parentNested->getType(), "tmp");
|
|
520 gIR->ir->CreateStore(ptr, DtoGEPi(fd->llvmNested, 0,0, "tmp"));
|
|
521 }
|
|
522 for (std::set<VarDeclaration*>::iterator i=fd->llvmNestedVars.begin(); i!=fd->llvmNestedVars.end(); ++i) {
|
|
523 VarDeclaration* vd = *i;
|
|
524 if (vd->isParameter()) {
|
|
525 gIR->ir->CreateStore(vd->llvmValue, DtoGEPi(fd->llvmNested, 0, vd->llvmNestedIndex, "tmp"));
|
|
526 vd->llvmValue = fd->llvmNested;
|
|
527 }
|
|
528 }
|
|
529 }
|
|
530
|
|
531 // copy _argptr to a memory location
|
|
532 if (f->linkage == LINKd && f->varargs == 1)
|
|
533 {
|
|
534 llvm::Value* argptrmem = new llvm::AllocaInst(fd->llvmArgPtr->getType(), "_argptrmem", gIR->topallocapoint());
|
|
535 new llvm::StoreInst(fd->llvmArgPtr, argptrmem, gIR->scopebb());
|
|
536 fd->llvmArgPtr = argptrmem;
|
|
537 }
|
|
538
|
|
539 // output function body
|
|
540 fd->fbody->toIR(gIR);
|
|
541
|
|
542 // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement
|
|
543 // in automatically, so we do it here.
|
|
544 if (!fd->isMain()) {
|
|
545 if (!gIR->scopereturned()) {
|
|
546 // pass the previous block into this block
|
|
547 if (global.params.symdebug) DtoDwarfFuncEnd(fd);
|
|
548 if (func->getReturnType() == llvm::Type::VoidTy) {
|
|
549 new llvm::ReturnInst(gIR->scopebb());
|
|
550 }
|
|
551 else {
|
|
552 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb());
|
|
553 }
|
|
554 }
|
|
555 }
|
|
556
|
|
557 // erase alloca point
|
|
558 f->llvmAllocaPoint->eraseFromParent();
|
|
559 f->llvmAllocaPoint = 0;
|
|
560 gIR->func()->allocapoint = 0;
|
|
561
|
|
562 gIR->scopes.pop_back();
|
|
563
|
|
564 // get rid of the endentry block, it's never used
|
|
565 assert(!func->getBasicBlockList().empty());
|
|
566 func->getBasicBlockList().pop_back();
|
|
567
|
|
568 // if the last block is empty now, it must be unreachable or it's a bug somewhere else
|
|
569 // would be nice to figure out how to assert that this is correct
|
|
570 llvm::BasicBlock* lastbb = &func->getBasicBlockList().back();
|
|
571 if (lastbb->empty()) {
|
|
572 if (lastbb->getNumUses() == 0)
|
|
573 lastbb->eraseFromParent();
|
|
574 else {
|
|
575 new llvm::UnreachableInst(lastbb);
|
|
576 /*if (func->getReturnType() == llvm::Type::VoidTy) {
|
|
577 new llvm::ReturnInst(lastbb);
|
|
578 }
|
|
579 else {
|
|
580 new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), lastbb);
|
|
581 }*/
|
|
582 }
|
|
583 }
|
|
584
|
|
585 gIR->functions.pop_back();
|
|
586 }
|
|
587 }
|
|
588 }
|
|
589
|
|
590 //////////////////////////////////////////////////////////////////////////////////////////
|
|
591
|
|
592 void DtoMain()
|
|
593 {
|
|
594 // emit main function llvm style
|
|
595 // int main(int argc, char**argv, char**env);
|
|
596
|
|
597 assert(gIR != 0);
|
|
598 IRState& ir = *gIR;
|
|
599
|
|
600 assert(ir.emitMain && ir.mainFunc);
|
|
601
|
|
602 // parameter types
|
|
603 std::vector<const llvm::Type*> pvec;
|
|
604 pvec.push_back((const llvm::Type*)llvm::Type::Int32Ty);
|
|
605 const llvm::Type* chPtrType = (const llvm::Type*)llvm::PointerType::get(llvm::Type::Int8Ty);
|
|
606 pvec.push_back((const llvm::Type*)llvm::PointerType::get(chPtrType));
|
|
607 pvec.push_back((const llvm::Type*)llvm::PointerType::get(chPtrType));
|
|
608 const llvm::Type* rettype = (const llvm::Type*)llvm::Type::Int32Ty;
|
|
609
|
|
610 llvm::FunctionType* functype = llvm::FunctionType::get(rettype, pvec, false);
|
|
611 llvm::Function* func = new llvm::Function(functype,llvm::GlobalValue::ExternalLinkage,"main",ir.module);
|
|
612
|
|
613 llvm::BasicBlock* bb = new llvm::BasicBlock("entry",func);
|
|
614
|
|
615 // call static ctors
|
|
616 llvm::Function* fn = LLVM_D_GetRuntimeFunction(ir.module,"_d_run_module_ctors");
|
|
617 llvm::Instruction* apt = new llvm::CallInst(fn,"",bb);
|
|
618
|
|
619 // call user main function
|
|
620 const llvm::FunctionType* mainty = ir.mainFunc->getFunctionType();
|
|
621 llvm::CallInst* call;
|
|
622 if (mainty->getNumParams() > 0)
|
|
623 {
|
|
624 // main with arguments
|
|
625 assert(mainty->getNumParams() == 1);
|
|
626 std::vector<llvm::Value*> args;
|
|
627 llvm::Function* mfn = LLVM_D_GetRuntimeFunction(ir.module,"_d_main_args");
|
|
628
|
|
629 llvm::Function::arg_iterator argi = func->arg_begin();
|
|
630 args.push_back(argi++);
|
|
631 args.push_back(argi++);
|
|
632
|
|
633 const llvm::Type* at = mainty->getParamType(0)->getContainedType(0);
|
|
634 llvm::Value* arr = new llvm::AllocaInst(at->getContainedType(1)->getContainedType(0), func->arg_begin(), "argstorage", apt);
|
|
635 llvm::Value* a = new llvm::AllocaInst(at, "argarray", apt);
|
|
636 llvm::Value* ptr = DtoGEPi(a,0,0,"tmp",bb);
|
|
637 llvm::Value* v = args[0];
|
|
638 if (v->getType() != DtoSize_t())
|
|
639 v = new llvm::ZExtInst(v, DtoSize_t(), "tmp", bb);
|
|
640 new llvm::StoreInst(v,ptr,bb);
|
|
641 ptr = DtoGEPi(a,0,1,"tmp",bb);
|
|
642 new llvm::StoreInst(arr,ptr,bb);
|
|
643 args.push_back(a);
|
|
644 new llvm::CallInst(mfn, args.begin(), args.end(), "", bb);
|
|
645 call = new llvm::CallInst(ir.mainFunc,a,"ret",bb);
|
|
646 }
|
|
647 else
|
|
648 {
|
|
649 // main with no arguments
|
|
650 call = new llvm::CallInst(ir.mainFunc,"ret",bb);
|
|
651 }
|
|
652 call->setCallingConv(ir.mainFunc->getCallingConv());
|
|
653
|
|
654 // call static dtors
|
|
655 fn = LLVM_D_GetRuntimeFunction(ir.module,"_d_run_module_dtors");
|
|
656 new llvm::CallInst(fn,"",bb);
|
|
657
|
|
658 // return
|
|
659 new llvm::ReturnInst(call,bb);
|
|
660 }
|
|
661
|
|
662 //////////////////////////////////////////////////////////////////////////////////////////
|