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comparison gen/functions.cpp @ 100:5071469303d4 trunk

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[svn r104] TONS OF FIXES. Split up declaration, constant initializer gen and definition for globals, structs, classes and functions. Improved ClassInfo support (not complete), not in vtable yet. Fixed a bunch of forward reference problems. Much more. Major commit! :)
author lindquist
date Fri, 16 Nov 2007 08:21:47 +0100
parents
children 027b8d8b71ec
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99:a676a7743642 100:5071469303d4
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 //////////////////////////////////////////////////////////////////////////////////////////