Mercurial > projects > ldc
annotate dmd/struct.c @ 88:058d3925950e trunk
[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.
| author | lindquist |
|---|---|
| date | Tue, 06 Nov 2007 10:03:14 +0100 |
| parents | b706170e24a9 |
| children | 5071469303d4 |
| rev | line source |
|---|---|
| 1 | 1 |
| 2 // Compiler implementation of the D programming language | |
| 3 // Copyright (c) 1999-2006 by Digital Mars | |
| 4 // All Rights Reserved | |
| 5 // written by Walter Bright | |
| 6 // http://www.digitalmars.com | |
| 7 // License for redistribution is by either the Artistic License | |
| 8 // in artistic.txt, or the GNU General Public License in gnu.txt. | |
| 9 // See the included readme.txt for details. | |
| 10 | |
| 11 #include <stdio.h> | |
| 12 #include <assert.h> | |
| 13 | |
| 14 #include "root.h" | |
| 15 #include "aggregate.h" | |
| 16 #include "scope.h" | |
| 17 #include "mtype.h" | |
| 18 #include "declaration.h" | |
| 19 #include "module.h" | |
| 20 #include "id.h" | |
| 21 #include "statement.h" | |
| 22 | |
| 23 /********************************* AggregateDeclaration ****************************/ | |
| 24 | |
| 25 AggregateDeclaration::AggregateDeclaration(Loc loc, Identifier *id) | |
| 26 : ScopeDsymbol(id) | |
| 27 { | |
| 28 this->loc = loc; | |
| 29 | |
| 30 storage_class = 0; | |
| 31 protection = PROTpublic; | |
| 32 type = NULL; | |
| 33 handle = NULL; | |
| 34 structsize = 0; // size of struct | |
| 35 alignsize = 0; // size of struct for alignment purposes | |
| 36 structalign = 0; // struct member alignment in effect | |
| 37 hasUnions = 0; | |
| 38 sizeok = 0; // size not determined yet | |
| 39 isdeprecated = 0; | |
| 40 inv = NULL; | |
| 41 aggNew = NULL; | |
| 42 aggDelete = NULL; | |
| 43 | |
| 44 stag = NULL; | |
| 45 sinit = NULL; | |
| 46 scope = NULL; | |
| 47 | |
| 48 llvmType = NULL; | |
| 49 llvmVtbl = NULL; | |
|
54
28e99b04a132
[svn r58] Fixed cond expression resulting in a non-basic type.
lindquist
parents:
1
diff
changeset
|
50 llvmConstVtbl = NULL; |
| 1 | 51 llvmInitZ = NULL; |
| 52 llvmInProgress = false; | |
| 73 | 53 llvmHasUnions = false; |
|
88
058d3925950e
[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.
lindquist
parents:
73
diff
changeset
|
54 llvmUnion = NULL; |
| 1 | 55 } |
| 56 | |
| 57 enum PROT AggregateDeclaration::prot() | |
| 58 { | |
| 59 return protection; | |
| 60 } | |
| 61 | |
| 62 void AggregateDeclaration::semantic2(Scope *sc) | |
| 63 { | |
| 64 //printf("AggregateDeclaration::semantic2(%s)\n", toChars()); | |
| 65 if (scope) | |
| 66 { error("has forward references"); | |
| 67 return; | |
| 68 } | |
| 69 if (members) | |
| 70 { | |
| 71 sc = sc->push(this); | |
| 72 for (size_t i = 0; i < members->dim; i++) | |
| 73 { | |
| 74 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 75 s->semantic2(sc); | |
| 76 } | |
| 77 sc->pop(); | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 void AggregateDeclaration::semantic3(Scope *sc) | |
| 82 { int i; | |
| 83 | |
| 84 //printf("AggregateDeclaration::semantic3(%s)\n", toChars()); | |
| 85 if (members) | |
| 86 { | |
| 87 sc = sc->push(this); | |
| 88 for (i = 0; i < members->dim; i++) | |
| 89 { | |
| 90 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 91 s->semantic3(sc); | |
| 92 } | |
| 93 sc->pop(); | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 void AggregateDeclaration::inlineScan() | |
| 98 { int i; | |
| 99 | |
| 100 //printf("AggregateDeclaration::inlineScan(%s)\n", toChars()); | |
| 101 if (members) | |
| 102 { | |
| 103 for (i = 0; i < members->dim; i++) | |
| 104 { | |
| 105 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 106 //printf("inline scan aggregate symbol '%s'\n", s->toChars()); | |
| 107 s->inlineScan(); | |
| 108 } | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 unsigned AggregateDeclaration::size(Loc loc) | |
| 113 { | |
| 114 //printf("AggregateDeclaration::size() = %d\n", structsize); | |
| 115 if (!members) | |
| 116 error(loc, "unknown size"); | |
| 117 if (sizeok != 1) | |
| 118 { error(loc, "no size yet for forward reference"); | |
| 119 //*(char*)0=0; | |
| 120 } | |
| 121 return structsize; | |
| 122 } | |
| 123 | |
| 124 Type *AggregateDeclaration::getType() | |
| 125 { | |
| 126 return type; | |
| 127 } | |
| 128 | |
| 129 int AggregateDeclaration::isDeprecated() | |
| 130 { | |
| 131 return isdeprecated; | |
| 132 } | |
| 133 | |
| 134 /**************************** | |
| 135 * Do byte or word alignment as necessary. | |
| 136 * Align sizes of 0, as we may not know array sizes yet. | |
| 137 */ | |
| 138 | |
| 139 void AggregateDeclaration::alignmember(unsigned salign, unsigned size, unsigned *poffset) | |
| 140 { | |
| 141 //printf("salign = %d, size = %d, offset = %d\n",salign,size,offset); | |
| 142 if (salign > 1) | |
| 143 { int sa; | |
| 144 | |
| 145 switch (size) | |
| 146 { case 1: | |
| 147 break; | |
| 148 case 2: | |
| 149 case_2: | |
| 150 *poffset = (*poffset + 1) & ~1; // align to word | |
| 151 break; | |
| 152 case 3: | |
| 153 case 4: | |
| 154 if (salign == 2) | |
| 155 goto case_2; | |
| 156 *poffset = (*poffset + 3) & ~3; // align to dword | |
| 157 break; | |
| 158 default: | |
| 159 *poffset = (*poffset + salign - 1) & ~(salign - 1); | |
| 160 break; | |
| 161 } | |
| 162 } | |
| 163 //printf("result = %d\n",offset); | |
| 164 } | |
| 165 | |
| 166 | |
| 167 void AggregateDeclaration::addField(Scope *sc, VarDeclaration *v) | |
| 168 { | |
| 169 unsigned memsize; // size of member | |
| 170 unsigned memalignsize; // size of member for alignment purposes | |
| 171 unsigned xalign; // alignment boundaries | |
| 172 | |
| 173 //printf("AggregateDeclaration::addField('%s') %s\n", v->toChars(), toChars()); | |
| 174 | |
| 175 // Check for forward referenced types which will fail the size() call | |
| 176 Type *t = v->type->toBasetype(); | |
| 177 if (t->ty == Tstruct /*&& isStructDeclaration()*/) | |
| 178 { TypeStruct *ts = (TypeStruct *)t; | |
| 179 | |
| 180 if (ts->sym->sizeok != 1) | |
| 181 { | |
| 182 sizeok = 2; // cannot finish; flag as forward referenced | |
| 183 return; | |
| 184 } | |
| 185 } | |
| 186 if (t->ty == Tident) | |
| 187 { | |
| 188 sizeok = 2; // cannot finish; flag as forward referenced | |
| 189 return; | |
| 190 } | |
| 191 | |
| 192 memsize = v->type->size(loc); | |
| 193 memalignsize = v->type->alignsize(); | |
| 194 xalign = v->type->memalign(sc->structalign); | |
| 195 alignmember(xalign, memalignsize, &sc->offset); | |
| 196 v->offset = sc->offset; | |
| 197 sc->offset += memsize; | |
| 198 if (sc->offset > structsize) | |
| 199 structsize = sc->offset; | |
| 200 if (sc->structalign < memalignsize) | |
| 201 memalignsize = sc->structalign; | |
| 202 if (alignsize < memalignsize) | |
| 203 alignsize = memalignsize; | |
| 204 //printf("\talignsize = %d\n", alignsize); | |
| 205 | |
| 206 v->storage_class |= STCfield; | |
| 207 //printf(" addField '%s' to '%s' at offset %d, size = %d\n", v->toChars(), toChars(), v->offset, memsize); | |
| 208 fields.push(v); | |
| 209 } | |
| 210 | |
| 211 | |
| 212 /********************************* StructDeclaration ****************************/ | |
| 213 | |
| 214 StructDeclaration::StructDeclaration(Loc loc, Identifier *id) | |
| 215 : AggregateDeclaration(loc, id) | |
| 216 { | |
| 217 zeroInit = 0; // assume false until we do semantic processing | |
| 218 | |
| 219 // For forward references | |
| 220 type = new TypeStruct(this); | |
| 221 } | |
| 222 | |
| 223 Dsymbol *StructDeclaration::syntaxCopy(Dsymbol *s) | |
| 224 { | |
| 225 StructDeclaration *sd; | |
| 226 | |
| 227 if (s) | |
| 228 sd = (StructDeclaration *)s; | |
| 229 else | |
| 230 sd = new StructDeclaration(loc, ident); | |
| 231 ScopeDsymbol::syntaxCopy(sd); | |
| 232 return sd; | |
| 233 } | |
| 234 | |
| 235 void StructDeclaration::semantic(Scope *sc) | |
| 236 { int i; | |
| 237 Scope *sc2; | |
| 238 | |
| 239 //printf("+StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); | |
| 240 | |
| 241 //static int count; if (++count == 20) *(char*)0=0; | |
| 242 | |
| 243 assert(type); | |
| 244 if (!members) // if forward reference | |
| 245 return; | |
| 246 | |
| 247 if (symtab) | |
| 248 { if (!scope) | |
| 249 return; // semantic() already completed | |
| 250 } | |
| 251 else | |
| 252 symtab = new DsymbolTable(); | |
| 253 | |
| 254 Scope *scx = NULL; | |
| 255 if (scope) | |
| 256 { sc = scope; | |
| 257 scx = scope; // save so we don't make redundant copies | |
| 258 scope = NULL; | |
| 259 } | |
| 260 | |
| 261 parent = sc->parent; | |
| 262 handle = type->pointerTo(); | |
| 263 structalign = sc->structalign; | |
| 264 protection = sc->protection; | |
| 265 assert(!isAnonymous()); | |
| 266 if (sc->stc & STCabstract) | |
| 267 error("structs, unions cannot be abstract"); | |
| 268 | |
| 269 if (sizeok == 0) // if not already done the addMember step | |
| 270 { | |
| 271 for (i = 0; i < members->dim; i++) | |
| 272 { | |
| 273 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 274 //printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars()); | |
| 275 s->addMember(sc, this, 1); | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 sizeok = 0; | |
| 280 sc2 = sc->push(this); | |
| 281 sc2->stc = 0; | |
| 282 sc2->parent = this; | |
| 283 if (isUnionDeclaration()) | |
| 284 sc2->inunion = 1; | |
| 285 sc2->protection = PROTpublic; | |
| 286 sc2->explicitProtection = 0; | |
| 287 | |
| 288 int members_dim = members->dim; | |
| 289 for (i = 0; i < members_dim; i++) | |
| 290 { | |
| 291 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 292 s->semantic(sc2); | |
| 293 if (isUnionDeclaration()) | |
| 294 sc2->offset = 0; | |
| 295 #if 0 | |
| 296 if (sizeok == 2) | |
| 297 { //printf("forward reference\n"); | |
| 298 break; | |
| 299 } | |
| 300 #endif | |
| 301 } | |
| 302 | |
| 303 /* The TypeInfo_Struct is expecting an opEquals and opCmp with | |
| 304 * a parameter that is a pointer to the struct. But if there | |
| 305 * isn't one, but is an opEquals or opCmp with a value, write | |
| 306 * another that is a shell around the value: | |
| 307 * int opCmp(struct *p) { return opCmp(*p); } | |
| 308 */ | |
| 309 | |
| 310 TypeFunction *tfeqptr; | |
| 311 { | |
| 312 Arguments *arguments = new Arguments; | |
| 313 Argument *arg = new Argument(STCin, handle, Id::p, NULL); | |
| 314 | |
| 315 arguments->push(arg); | |
| 316 tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd); | |
| 317 tfeqptr = (TypeFunction *)tfeqptr->semantic(0, sc); | |
| 318 } | |
| 319 | |
| 320 TypeFunction *tfeq; | |
| 321 { | |
| 322 Arguments *arguments = new Arguments; | |
| 323 Argument *arg = new Argument(STCin, type, NULL, NULL); | |
| 324 | |
| 325 arguments->push(arg); | |
| 326 tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd); | |
| 327 tfeq = (TypeFunction *)tfeq->semantic(0, sc); | |
| 328 } | |
| 329 | |
| 330 Identifier *id = Id::eq; | |
| 331 for (int i = 0; i < 2; i++) | |
| 332 { | |
| 333 Dsymbol *s = search_function(this, id); | |
| 334 FuncDeclaration *fdx = s ? s->isFuncDeclaration() : NULL; | |
| 335 if (fdx) | |
| 336 { FuncDeclaration *fd = fdx->overloadExactMatch(tfeqptr); | |
| 337 if (!fd) | |
| 338 { fd = fdx->overloadExactMatch(tfeq); | |
| 339 if (fd) | |
| 340 { // Create the thunk, fdptr | |
| 341 FuncDeclaration *fdptr = new FuncDeclaration(loc, loc, fdx->ident, STCundefined, tfeqptr); | |
| 342 Expression *e = new IdentifierExp(loc, Id::p); | |
| 343 e = new PtrExp(loc, e); | |
| 344 Expressions *args = new Expressions(); | |
| 345 args->push(e); | |
| 346 e = new IdentifierExp(loc, id); | |
| 347 e = new CallExp(loc, e, args); | |
| 348 fdptr->fbody = new ReturnStatement(loc, e); | |
| 349 ScopeDsymbol *s = fdx->parent->isScopeDsymbol(); | |
| 350 assert(s); | |
| 351 s->members->push(fdptr); | |
| 352 fdptr->addMember(sc, s, 1); | |
| 353 fdptr->semantic(sc2); | |
| 354 } | |
| 355 } | |
| 356 } | |
| 357 | |
| 358 id = Id::cmp; | |
| 359 } | |
| 360 | |
| 361 | |
| 362 sc2->pop(); | |
| 363 | |
| 364 if (sizeok == 2) | |
| 365 { // semantic() failed because of forward references. | |
| 366 // Unwind what we did, and defer it for later | |
| 367 fields.setDim(0); | |
| 368 structsize = 0; | |
| 369 alignsize = 0; | |
| 370 structalign = 0; | |
| 371 | |
| 372 scope = scx ? scx : new Scope(*sc); | |
| 373 scope->setNoFree(); | |
| 374 scope->module->addDeferredSemantic(this); | |
| 375 //printf("\tdeferring %s\n", toChars()); | |
| 376 return; | |
| 377 } | |
| 378 | |
| 379 // 0 sized struct's are set to 1 byte | |
| 380 if (structsize == 0) | |
| 381 { | |
| 382 structsize = 1; | |
| 383 alignsize = 1; | |
| 384 } | |
| 385 | |
| 386 // Round struct size up to next alignsize boundary. | |
| 387 // This will ensure that arrays of structs will get their internals | |
| 388 // aligned properly. | |
| 389 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 390 | |
| 391 sizeok = 1; | |
| 392 Module::dprogress++; | |
| 393 | |
| 394 //printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); | |
| 395 | |
| 396 // Determine if struct is all zeros or not | |
| 397 zeroInit = 1; | |
| 398 for (i = 0; i < fields.dim; i++) | |
| 399 { | |
| 400 Dsymbol *s = (Dsymbol *)fields.data[i]; | |
| 401 VarDeclaration *vd = s->isVarDeclaration(); | |
| 402 if (vd && !vd->isDataseg()) | |
| 403 { | |
| 404 if (vd->init) | |
| 405 { | |
| 406 // Should examine init to see if it is really all 0's | |
| 407 zeroInit = 0; | |
| 408 break; | |
| 409 } | |
| 410 else | |
| 411 { | |
| 412 if (!vd->type->isZeroInit()) | |
| 413 { | |
| 414 zeroInit = 0; | |
| 415 break; | |
| 416 } | |
| 417 } | |
| 418 } | |
| 419 } | |
| 420 | |
| 421 /* Look for special member functions. | |
| 422 */ | |
| 423 inv = (InvariantDeclaration *)search(0, Id::classInvariant, 0); | |
| 424 aggNew = (NewDeclaration *)search(0, Id::classNew, 0); | |
| 425 aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0); | |
| 426 | |
| 427 if (sc->func) | |
| 428 { | |
| 429 semantic2(sc); | |
| 430 semantic3(sc); | |
| 431 } | |
| 432 } | |
| 433 | |
| 434 void StructDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 435 { int i; | |
| 436 | |
| 437 buf->printf("%s ", kind()); | |
| 438 if (!isAnonymous()) | |
| 439 buf->writestring(toChars()); | |
| 440 if (!members) | |
| 441 { | |
| 442 buf->writeByte(';'); | |
| 443 buf->writenl(); | |
| 444 return; | |
| 445 } | |
| 446 buf->writenl(); | |
| 447 buf->writeByte('{'); | |
| 448 buf->writenl(); | |
| 449 for (i = 0; i < members->dim; i++) | |
| 450 { | |
| 451 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 452 | |
| 453 buf->writestring(" "); | |
| 454 s->toCBuffer(buf, hgs); | |
| 455 } | |
| 456 buf->writeByte('}'); | |
| 457 buf->writenl(); | |
| 458 } | |
| 459 | |
| 460 | |
| 461 char *StructDeclaration::kind() | |
| 462 { | |
| 463 return "struct"; | |
| 464 } | |
| 465 | |
| 466 /********************************* UnionDeclaration ****************************/ | |
| 467 | |
| 468 UnionDeclaration::UnionDeclaration(Loc loc, Identifier *id) | |
| 469 : StructDeclaration(loc, id) | |
| 470 { | |
| 471 } | |
| 472 | |
| 473 Dsymbol *UnionDeclaration::syntaxCopy(Dsymbol *s) | |
| 474 { | |
| 475 UnionDeclaration *ud; | |
| 476 | |
| 477 if (s) | |
| 478 ud = (UnionDeclaration *)s; | |
| 479 else | |
| 480 ud = new UnionDeclaration(loc, ident); | |
| 481 StructDeclaration::syntaxCopy(ud); | |
| 482 return ud; | |
| 483 } | |
| 484 | |
| 485 | |
| 486 char *UnionDeclaration::kind() | |
| 487 { | |
| 488 return "union"; | |
| 489 } | |
| 490 | |
| 491 |