Mercurial > projects > ldc
annotate dmd/struct.c @ 136:0e28624814e8 trunk
[svn r140] did a lot of the work towards being able to pass multiple modules on the command line. not complete yet though
| author | lindquist |
|---|---|
| date | Thu, 17 Jan 2008 03:15:12 +0100 |
| parents | 9c79b61fb638 |
| children | ce7b81fb957f |
| 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 llvmVtbl = NULL; | |
|
54
28e99b04a132
[svn r58] Fixed cond expression resulting in a non-basic type.
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1
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changeset
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49 llvmConstVtbl = NULL; |
|
121
9c79b61fb638
[svn r125] Renamed/moved a few backend member inside DMD structures for consistency.
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50 llvmInit = NULL; |
|
9c79b61fb638
[svn r125] Renamed/moved a few backend member inside DMD structures for consistency.
lindquist
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51 llvmConstInit = NULL; |
| 100 | 52 llvmClass = NULL; |
|
121
9c79b61fb638
[svn r125] Renamed/moved a few backend member inside DMD structures for consistency.
lindquist
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diff
changeset
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53 llvmConstClass = NULL; |
| 1 | 54 llvmInProgress = false; |
| 73 | 55 llvmHasUnions = false; |
|
88
058d3925950e
[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.
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56 llvmUnion = NULL; |
|
136
0e28624814e8
[svn r140] did a lot of the work towards being able to pass multiple modules on the command line. not complete yet though
lindquist
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57 llvmIrStruct = NULL; |
|
102
027b8d8b71ec
[svn r106] Turns out the last commit wasn't enough, now the D->LLVM process is even more split up.
lindquist
parents:
100
diff
changeset
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58 llvmClassDeclared = false; |
|
027b8d8b71ec
[svn r106] Turns out the last commit wasn't enough, now the D->LLVM process is even more split up.
lindquist
parents:
100
diff
changeset
|
59 llvmClassDefined = false; |
| 1 | 60 } |
| 61 | |
| 62 enum PROT AggregateDeclaration::prot() | |
| 63 { | |
| 64 return protection; | |
| 65 } | |
| 66 | |
| 67 void AggregateDeclaration::semantic2(Scope *sc) | |
| 68 { | |
| 69 //printf("AggregateDeclaration::semantic2(%s)\n", toChars()); | |
| 70 if (scope) | |
| 71 { error("has forward references"); | |
| 72 return; | |
| 73 } | |
| 74 if (members) | |
| 75 { | |
| 76 sc = sc->push(this); | |
| 77 for (size_t i = 0; i < members->dim; i++) | |
| 78 { | |
| 79 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 80 s->semantic2(sc); | |
| 81 } | |
| 82 sc->pop(); | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 void AggregateDeclaration::semantic3(Scope *sc) | |
| 87 { int i; | |
| 88 | |
| 89 //printf("AggregateDeclaration::semantic3(%s)\n", toChars()); | |
| 90 if (members) | |
| 91 { | |
| 92 sc = sc->push(this); | |
| 93 for (i = 0; i < members->dim; i++) | |
| 94 { | |
| 95 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 96 s->semantic3(sc); | |
| 97 } | |
| 98 sc->pop(); | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 void AggregateDeclaration::inlineScan() | |
| 103 { int i; | |
| 104 | |
| 105 //printf("AggregateDeclaration::inlineScan(%s)\n", toChars()); | |
| 106 if (members) | |
| 107 { | |
| 108 for (i = 0; i < members->dim; i++) | |
| 109 { | |
| 110 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 111 //printf("inline scan aggregate symbol '%s'\n", s->toChars()); | |
| 112 s->inlineScan(); | |
| 113 } | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 unsigned AggregateDeclaration::size(Loc loc) | |
| 118 { | |
| 119 //printf("AggregateDeclaration::size() = %d\n", structsize); | |
| 120 if (!members) | |
| 121 error(loc, "unknown size"); | |
| 122 if (sizeok != 1) | |
| 123 { error(loc, "no size yet for forward reference"); | |
| 124 //*(char*)0=0; | |
| 125 } | |
| 126 return structsize; | |
| 127 } | |
| 128 | |
| 129 Type *AggregateDeclaration::getType() | |
| 130 { | |
| 131 return type; | |
| 132 } | |
| 133 | |
| 134 int AggregateDeclaration::isDeprecated() | |
| 135 { | |
| 136 return isdeprecated; | |
| 137 } | |
| 138 | |
| 139 /**************************** | |
| 140 * Do byte or word alignment as necessary. | |
| 141 * Align sizes of 0, as we may not know array sizes yet. | |
| 142 */ | |
| 143 | |
| 144 void AggregateDeclaration::alignmember(unsigned salign, unsigned size, unsigned *poffset) | |
| 145 { | |
| 146 //printf("salign = %d, size = %d, offset = %d\n",salign,size,offset); | |
| 147 if (salign > 1) | |
| 148 { int sa; | |
| 149 | |
| 150 switch (size) | |
| 151 { case 1: | |
| 152 break; | |
| 153 case 2: | |
| 154 case_2: | |
| 155 *poffset = (*poffset + 1) & ~1; // align to word | |
| 156 break; | |
| 157 case 3: | |
| 158 case 4: | |
| 159 if (salign == 2) | |
| 160 goto case_2; | |
| 161 *poffset = (*poffset + 3) & ~3; // align to dword | |
| 162 break; | |
| 163 default: | |
| 164 *poffset = (*poffset + salign - 1) & ~(salign - 1); | |
| 165 break; | |
| 166 } | |
| 167 } | |
| 168 //printf("result = %d\n",offset); | |
| 169 } | |
| 170 | |
| 171 | |
| 172 void AggregateDeclaration::addField(Scope *sc, VarDeclaration *v) | |
| 173 { | |
| 174 unsigned memsize; // size of member | |
| 175 unsigned memalignsize; // size of member for alignment purposes | |
| 176 unsigned xalign; // alignment boundaries | |
| 177 | |
| 178 //printf("AggregateDeclaration::addField('%s') %s\n", v->toChars(), toChars()); | |
| 179 | |
| 180 // Check for forward referenced types which will fail the size() call | |
| 181 Type *t = v->type->toBasetype(); | |
| 182 if (t->ty == Tstruct /*&& isStructDeclaration()*/) | |
| 183 { TypeStruct *ts = (TypeStruct *)t; | |
| 184 | |
| 185 if (ts->sym->sizeok != 1) | |
| 186 { | |
| 187 sizeok = 2; // cannot finish; flag as forward referenced | |
| 188 return; | |
| 189 } | |
| 190 } | |
| 191 if (t->ty == Tident) | |
| 192 { | |
| 193 sizeok = 2; // cannot finish; flag as forward referenced | |
| 194 return; | |
| 195 } | |
| 196 | |
| 197 memsize = v->type->size(loc); | |
| 198 memalignsize = v->type->alignsize(); | |
| 199 xalign = v->type->memalign(sc->structalign); | |
| 200 alignmember(xalign, memalignsize, &sc->offset); | |
| 201 v->offset = sc->offset; | |
| 202 sc->offset += memsize; | |
| 203 if (sc->offset > structsize) | |
| 204 structsize = sc->offset; | |
| 205 if (sc->structalign < memalignsize) | |
| 206 memalignsize = sc->structalign; | |
| 207 if (alignsize < memalignsize) | |
| 208 alignsize = memalignsize; | |
| 209 //printf("\talignsize = %d\n", alignsize); | |
| 210 | |
| 211 v->storage_class |= STCfield; | |
| 212 //printf(" addField '%s' to '%s' at offset %d, size = %d\n", v->toChars(), toChars(), v->offset, memsize); | |
| 213 fields.push(v); | |
| 214 } | |
| 215 | |
| 216 | |
| 217 /********************************* StructDeclaration ****************************/ | |
| 218 | |
| 219 StructDeclaration::StructDeclaration(Loc loc, Identifier *id) | |
| 220 : AggregateDeclaration(loc, id) | |
| 221 { | |
| 222 zeroInit = 0; // assume false until we do semantic processing | |
| 223 | |
| 224 // For forward references | |
| 225 type = new TypeStruct(this); | |
| 226 } | |
| 227 | |
| 228 Dsymbol *StructDeclaration::syntaxCopy(Dsymbol *s) | |
| 229 { | |
| 230 StructDeclaration *sd; | |
| 231 | |
| 232 if (s) | |
| 233 sd = (StructDeclaration *)s; | |
| 234 else | |
| 235 sd = new StructDeclaration(loc, ident); | |
| 236 ScopeDsymbol::syntaxCopy(sd); | |
| 237 return sd; | |
| 238 } | |
| 239 | |
| 240 void StructDeclaration::semantic(Scope *sc) | |
| 241 { int i; | |
| 242 Scope *sc2; | |
| 243 | |
| 244 //printf("+StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); | |
| 245 | |
| 246 //static int count; if (++count == 20) *(char*)0=0; | |
| 247 | |
| 248 assert(type); | |
| 249 if (!members) // if forward reference | |
| 250 return; | |
| 251 | |
| 252 if (symtab) | |
| 253 { if (!scope) | |
| 254 return; // semantic() already completed | |
| 255 } | |
| 256 else | |
| 257 symtab = new DsymbolTable(); | |
| 258 | |
| 259 Scope *scx = NULL; | |
| 260 if (scope) | |
| 261 { sc = scope; | |
| 262 scx = scope; // save so we don't make redundant copies | |
| 263 scope = NULL; | |
| 264 } | |
| 265 | |
| 266 parent = sc->parent; | |
| 267 handle = type->pointerTo(); | |
| 268 structalign = sc->structalign; | |
| 269 protection = sc->protection; | |
| 270 assert(!isAnonymous()); | |
| 271 if (sc->stc & STCabstract) | |
| 272 error("structs, unions cannot be abstract"); | |
| 273 | |
| 274 if (sizeok == 0) // if not already done the addMember step | |
| 275 { | |
| 276 for (i = 0; i < members->dim; i++) | |
| 277 { | |
| 278 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 279 //printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars()); | |
| 280 s->addMember(sc, this, 1); | |
| 281 } | |
| 282 } | |
| 283 | |
| 284 sizeok = 0; | |
| 285 sc2 = sc->push(this); | |
| 286 sc2->stc = 0; | |
| 287 sc2->parent = this; | |
| 288 if (isUnionDeclaration()) | |
| 289 sc2->inunion = 1; | |
| 290 sc2->protection = PROTpublic; | |
| 291 sc2->explicitProtection = 0; | |
| 292 | |
| 293 int members_dim = members->dim; | |
| 294 for (i = 0; i < members_dim; i++) | |
| 295 { | |
| 296 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 297 s->semantic(sc2); | |
| 298 if (isUnionDeclaration()) | |
| 299 sc2->offset = 0; | |
| 300 #if 0 | |
| 301 if (sizeok == 2) | |
| 302 { //printf("forward reference\n"); | |
| 303 break; | |
| 304 } | |
| 305 #endif | |
| 306 } | |
| 307 | |
| 308 /* The TypeInfo_Struct is expecting an opEquals and opCmp with | |
| 309 * a parameter that is a pointer to the struct. But if there | |
| 310 * isn't one, but is an opEquals or opCmp with a value, write | |
| 311 * another that is a shell around the value: | |
| 312 * int opCmp(struct *p) { return opCmp(*p); } | |
| 313 */ | |
| 314 | |
| 315 TypeFunction *tfeqptr; | |
| 316 { | |
| 317 Arguments *arguments = new Arguments; | |
| 318 Argument *arg = new Argument(STCin, handle, Id::p, NULL); | |
| 319 | |
| 320 arguments->push(arg); | |
| 321 tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd); | |
| 322 tfeqptr = (TypeFunction *)tfeqptr->semantic(0, sc); | |
| 323 } | |
| 324 | |
| 325 TypeFunction *tfeq; | |
| 326 { | |
| 327 Arguments *arguments = new Arguments; | |
| 328 Argument *arg = new Argument(STCin, type, NULL, NULL); | |
| 329 | |
| 330 arguments->push(arg); | |
| 331 tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd); | |
| 332 tfeq = (TypeFunction *)tfeq->semantic(0, sc); | |
| 333 } | |
| 334 | |
| 335 Identifier *id = Id::eq; | |
| 336 for (int i = 0; i < 2; i++) | |
| 337 { | |
| 338 Dsymbol *s = search_function(this, id); | |
| 339 FuncDeclaration *fdx = s ? s->isFuncDeclaration() : NULL; | |
| 340 if (fdx) | |
| 341 { FuncDeclaration *fd = fdx->overloadExactMatch(tfeqptr); | |
| 342 if (!fd) | |
| 343 { fd = fdx->overloadExactMatch(tfeq); | |
| 344 if (fd) | |
| 345 { // Create the thunk, fdptr | |
| 346 FuncDeclaration *fdptr = new FuncDeclaration(loc, loc, fdx->ident, STCundefined, tfeqptr); | |
| 347 Expression *e = new IdentifierExp(loc, Id::p); | |
| 348 e = new PtrExp(loc, e); | |
| 349 Expressions *args = new Expressions(); | |
| 350 args->push(e); | |
| 351 e = new IdentifierExp(loc, id); | |
| 352 e = new CallExp(loc, e, args); | |
| 353 fdptr->fbody = new ReturnStatement(loc, e); | |
| 354 ScopeDsymbol *s = fdx->parent->isScopeDsymbol(); | |
| 355 assert(s); | |
| 356 s->members->push(fdptr); | |
| 357 fdptr->addMember(sc, s, 1); | |
| 358 fdptr->semantic(sc2); | |
| 359 } | |
| 360 } | |
| 361 } | |
| 362 | |
| 363 id = Id::cmp; | |
| 364 } | |
| 365 | |
| 366 | |
| 367 sc2->pop(); | |
| 368 | |
| 369 if (sizeok == 2) | |
| 370 { // semantic() failed because of forward references. | |
| 371 // Unwind what we did, and defer it for later | |
| 372 fields.setDim(0); | |
| 373 structsize = 0; | |
| 374 alignsize = 0; | |
| 375 structalign = 0; | |
| 376 | |
| 377 scope = scx ? scx : new Scope(*sc); | |
| 378 scope->setNoFree(); | |
| 379 scope->module->addDeferredSemantic(this); | |
| 380 //printf("\tdeferring %s\n", toChars()); | |
| 381 return; | |
| 382 } | |
| 383 | |
| 384 // 0 sized struct's are set to 1 byte | |
| 385 if (structsize == 0) | |
| 386 { | |
| 387 structsize = 1; | |
| 388 alignsize = 1; | |
| 389 } | |
| 390 | |
| 391 // Round struct size up to next alignsize boundary. | |
| 392 // This will ensure that arrays of structs will get their internals | |
| 393 // aligned properly. | |
| 394 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 395 | |
| 396 sizeok = 1; | |
| 397 Module::dprogress++; | |
| 398 | |
| 399 //printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); | |
| 400 | |
| 401 // Determine if struct is all zeros or not | |
| 402 zeroInit = 1; | |
| 403 for (i = 0; i < fields.dim; i++) | |
| 404 { | |
| 405 Dsymbol *s = (Dsymbol *)fields.data[i]; | |
| 406 VarDeclaration *vd = s->isVarDeclaration(); | |
| 407 if (vd && !vd->isDataseg()) | |
| 408 { | |
| 409 if (vd->init) | |
| 410 { | |
| 411 // Should examine init to see if it is really all 0's | |
| 412 zeroInit = 0; | |
| 413 break; | |
| 414 } | |
| 415 else | |
| 416 { | |
| 417 if (!vd->type->isZeroInit()) | |
| 418 { | |
| 419 zeroInit = 0; | |
| 420 break; | |
| 421 } | |
| 422 } | |
| 423 } | |
| 424 } | |
| 425 | |
| 426 /* Look for special member functions. | |
| 427 */ | |
| 428 inv = (InvariantDeclaration *)search(0, Id::classInvariant, 0); | |
| 429 aggNew = (NewDeclaration *)search(0, Id::classNew, 0); | |
| 430 aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0); | |
| 431 | |
| 432 if (sc->func) | |
| 433 { | |
| 434 semantic2(sc); | |
| 435 semantic3(sc); | |
| 436 } | |
| 437 } | |
| 438 | |
| 439 void StructDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 440 { int i; | |
| 441 | |
| 442 buf->printf("%s ", kind()); | |
| 443 if (!isAnonymous()) | |
| 444 buf->writestring(toChars()); | |
| 445 if (!members) | |
| 446 { | |
| 447 buf->writeByte(';'); | |
| 448 buf->writenl(); | |
| 449 return; | |
| 450 } | |
| 451 buf->writenl(); | |
| 452 buf->writeByte('{'); | |
| 453 buf->writenl(); | |
| 454 for (i = 0; i < members->dim; i++) | |
| 455 { | |
| 456 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 457 | |
| 458 buf->writestring(" "); | |
| 459 s->toCBuffer(buf, hgs); | |
| 460 } | |
| 461 buf->writeByte('}'); | |
| 462 buf->writenl(); | |
| 463 } | |
| 464 | |
| 465 | |
| 466 char *StructDeclaration::kind() | |
| 467 { | |
| 468 return "struct"; | |
| 469 } | |
| 470 | |
| 471 /********************************* UnionDeclaration ****************************/ | |
| 472 | |
| 473 UnionDeclaration::UnionDeclaration(Loc loc, Identifier *id) | |
| 474 : StructDeclaration(loc, id) | |
| 475 { | |
| 476 } | |
| 477 | |
| 478 Dsymbol *UnionDeclaration::syntaxCopy(Dsymbol *s) | |
| 479 { | |
| 480 UnionDeclaration *ud; | |
| 481 | |
| 482 if (s) | |
| 483 ud = (UnionDeclaration *)s; | |
| 484 else | |
| 485 ud = new UnionDeclaration(loc, ident); | |
| 486 StructDeclaration::syntaxCopy(ud); | |
| 487 return ud; | |
| 488 } | |
| 489 | |
| 490 | |
| 491 char *UnionDeclaration::kind() | |
| 492 { | |
| 493 return "union"; | |
| 494 } | |
| 495 | |
| 496 |