Mercurial > projects > ddmd
annotate dmd/codegen/Util.d @ 73:ef02e2e203c2
Updating to dmd2.033
| author | korDen |
|---|---|
| date | Sat, 28 Aug 2010 19:42:41 +0400 |
| parents | f708f0452e81 |
| children | 7e0d548de9e6 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.codegen.Util; |
| 2 | |
| 3 import dmd.Loc; | |
| 73 | 4 import dmd.Id; |
| 0 | 5 import dmd.IRState; |
| 6 import dmd.Type; | |
| 7 import dmd.Array; | |
| 8 import dmd.Dsymbol; | |
| 9 import dmd.FuncDeclaration; | |
| 10 import dmd.Identifier; | |
| 11 import dmd.RET; | |
| 12 import dmd.TY; | |
| 13 import dmd.LINK; | |
| 14 import dmd.Expression; | |
| 15 import dmd.Argument; | |
| 16 import dmd.STC; | |
| 17 import dmd.Global; | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
5
diff
changeset
|
18 import dmd.Module; |
| 0 | 19 import dmd.InterfaceDeclaration; |
| 20 import dmd.AggregateDeclaration; | |
| 21 import dmd.AttribDeclaration; | |
| 22 import dmd.TupleDeclaration; | |
| 23 import dmd.StructDeclaration; | |
| 24 import dmd.VarDeclaration; | |
| 25 import dmd.ClassDeclaration; | |
| 26 import dmd.TemplateMixin; | |
| 27 import dmd.TypedefDeclaration; | |
| 28 import dmd.ExpInitializer; | |
| 29 import dmd.TypeFunction; | |
| 30 import dmd.TypeStruct; | |
| 31 import dmd.TypeSArray; | |
| 32 import dmd.TOK; | |
| 33 import dmd.Util; | |
| 34 import dmd.LabelStatement; | |
| 35 import dmd.DsymbolExp; | |
| 36 import dmd.LabelDsymbol; | |
| 37 import dmd.backend.elem; | |
| 38 import dmd.backend.TYPE; | |
| 39 import dmd.backend.Util; | |
| 40 import dmd.backend.Classsym; | |
| 41 import dmd.backend.SC; | |
| 42 import dmd.backend.FL; | |
| 43 import dmd.backend.SFL; | |
| 44 import dmd.backend.STR; | |
| 45 import dmd.backend.TYM; | |
| 46 import dmd.backend.TF; | |
| 47 import dmd.backend.OPER; | |
| 48 import dmd.backend.mTYman; | |
| 49 import dmd.backend.TYFL; | |
| 50 import dmd.backend.mTY; | |
| 51 import dmd.backend.Symbol; | |
| 52 import dmd.backend.Blockx; | |
| 53 import dmd.backend.RTLSYM; | |
| 54 import dmd.backend.block; | |
| 55 import dmd.backend.LIST; | |
| 56 | |
| 57 import std.string; | |
| 58 import core.stdc.string; | |
|
5
63623152e82a
Fixed memory corruption bug which was introduced when attempting to restore GC functionality
dkoroskin <>
parents:
4
diff
changeset
|
59 import core.stdc.stdlib; |
| 0 | 60 |
| 4 | 61 import core.memory; |
| 2 | 62 |
| 0 | 63 /************************************ |
| 64 * Call a function. | |
| 65 */ | |
| 66 | |
| 67 elem* callfunc(Loc loc, | |
| 68 IRState* irs, | |
| 69 int directcall, // 1: don't do virtual call | |
| 70 Type tret, // return type | |
| 71 elem *ec, // evaluates to function address | |
| 72 Type ectype, // original type of ec | |
| 73 FuncDeclaration fd, // if !=null, this is the function being called | |
| 74 Type t, // TypeDelegate or TypeFunction for this function | |
| 75 elem* ehidden, // if !=null, this is the 'hidden' argument | |
| 76 Array arguments) | |
| 77 { | |
| 78 elem* ep; | |
| 79 elem* e; | |
| 80 elem* ethis = null; | |
| 81 elem* eside = null; | |
| 82 int i; | |
| 83 tym_t ty; | |
| 84 tym_t tyret; | |
| 85 RET retmethod; | |
| 86 int reverse; | |
| 87 TypeFunction tf; | |
| 88 OPER op; | |
| 89 | |
| 90 static if (false) { | |
| 91 printf("callfunc(directcall = %d, tret = '%s', ec = %p, fd = %p)\n", | |
| 92 directcall, tret.toChars(), ec, fd); | |
| 93 printf("ec: "); elem_print(ec); | |
| 94 if (fd) | |
| 95 printf("fd = '%s'\n", fd.toChars()); | |
| 96 } | |
| 97 | |
| 98 t = t.toBasetype(); | |
| 99 if (t.ty == TY.Tdelegate) | |
| 100 { | |
| 101 // A delegate consists of: | |
| 102 // { Object *this; Function *funcptr; } | |
| 103 assert(!fd); | |
| 104 assert(t.nextOf().ty == TY.Tfunction); | |
| 105 tf = cast(TypeFunction)t.nextOf(); | |
| 106 ethis = ec; | |
| 107 ec = el_same(ðis); | |
| 108 ethis = el_una(OPER.OP64_32, TYM.TYnptr, ethis); // get this | |
| 109 ec = array_toPtr(t, ec); // get funcptr | |
| 110 ec = el_una(OPER.OPind, tf.totym(), ec); | |
| 111 } | |
| 112 else | |
| 113 { | |
| 114 assert(t.ty == TY.Tfunction); | |
| 115 tf = cast(TypeFunction)t; | |
| 116 } | |
| 117 | |
| 118 retmethod = tf.retStyle(); | |
| 119 ty = ec.Ety; | |
| 120 if (fd) | |
| 121 ty = fd.toSymbol().Stype.Tty; | |
| 122 reverse = tyrevfunc(ty); | |
| 123 ep = null; | |
| 124 if (arguments) | |
| 125 { | |
| 126 // j=1 if _arguments[] is first argument | |
| 127 int j = (tf.linkage == LINK.LINKd && tf.varargs == 1); | |
| 128 | |
| 129 for (i = 0; i < arguments.dim ; i++) | |
| 130 { | |
| 131 Expression arg; | |
| 132 elem* ea; | |
| 133 | |
| 134 arg = cast(Expression)arguments.data[i]; | |
| 135 //printf("\targ[%d]: %s\n", i, arg.toChars()); | |
| 136 | |
| 137 size_t nparams = Argument.dim(tf.parameters); | |
| 138 if (i - j < nparams && i >= j) | |
| 139 { | |
| 140 Argument p = Argument.getNth(tf.parameters, i - j); | |
| 141 | |
| 142 if (p.storageClass & (STC.STCout | STC.STCref)) | |
| 143 { | |
| 144 // Convert argument to a pointer, | |
| 145 // use AddrExp.toElem() | |
| 146 Expression ae = arg.addressOf(null); | |
| 147 ea = ae.toElem(irs); | |
| 148 goto L1; | |
| 149 } | |
| 150 } | |
| 151 ea = arg.toElem(irs); | |
| 152 L1: | |
| 153 if (tybasic(ea.Ety) == TYM.TYstruct) | |
| 154 { | |
| 155 ea = el_una(OPER.OPstrpar, TYM.TYstruct, ea); | |
| 156 ea.Enumbytes = ea.E1.Enumbytes; | |
| 157 assert(ea.Enumbytes); | |
| 158 } | |
| 159 if (reverse) | |
| 160 ep = el_param(ep,ea); | |
| 161 else | |
| 162 ep = el_param(ea,ep); | |
| 163 } | |
| 164 } | |
| 165 | |
| 166 if (retmethod == RET.RETstack) | |
| 167 { | |
| 168 if (!ehidden) | |
| 169 { | |
| 170 // Don't have one, so create one | |
| 171 type* tt; | |
| 172 | |
| 173 if (tf.next.toBasetype().ty == TY.Tstruct) | |
| 174 tt = tf.next.toCtype(); | |
| 175 else | |
| 176 tt = type_fake(tf.next.totym()); | |
| 177 | |
| 178 Symbol* stmp = symbol_genauto(tt); | |
| 179 ehidden = el_ptr(stmp); | |
| 180 } | |
| 181 if ((global.params.isLinux || global.params.isOSX || global.params.isFreeBSD || global.params.isSolaris) && tf.linkage != LINK.LINKd) { | |
| 182 ; // ehidden goes last on Linux/OSX C++ | |
| 183 } else { | |
| 184 if (ep) | |
| 185 { | |
| 186 static if (false) { // BUG: implement | |
| 187 if (reverse && type_mangle(tfunc) == mTYman.mTYman_cpp) { | |
| 188 ep = el_param(ehidden,ep); | |
| 189 } else { | |
| 190 ep = el_param(ep,ehidden); | |
| 191 } | |
| 192 } else { | |
| 193 ep = el_param(ep,ehidden); | |
| 194 } | |
| 195 } | |
| 196 else | |
| 197 ep = ehidden; | |
| 198 ehidden = null; | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 if (fd && fd.isMember2()) | |
| 203 { | |
| 204 InterfaceDeclaration intd; | |
| 205 Symbol* sfunc; | |
| 206 AggregateDeclaration ad; | |
| 207 | |
| 208 ad = fd.isThis(); | |
| 209 if (ad) | |
| 210 { | |
| 211 ethis = ec; | |
| 212 if (ad.isStructDeclaration() && tybasic(ec.Ety) != TYM.TYnptr) | |
| 213 { | |
| 214 ethis = addressElem(ec, ectype); | |
| 215 } | |
| 216 } | |
| 217 else | |
| 218 { | |
| 219 // Evaluate ec for side effects | |
| 220 eside = ec; | |
| 221 } | |
| 222 sfunc = fd.toSymbol(); | |
| 223 | |
| 224 if (!fd.isVirtual() || | |
| 225 directcall || // BUG: fix | |
| 226 fd.isFinal()) | |
| 227 { | |
| 228 // make static call | |
| 229 ec = el_var(sfunc); | |
| 230 } | |
| 231 else | |
| 232 { | |
| 233 // make virtual call | |
| 234 elem* ev; | |
| 235 uint vindex; | |
| 236 | |
| 237 assert(ethis); | |
| 238 ev = el_same(ðis); | |
| 239 ev = el_una(OPER.OPind, TYM.TYnptr, ev); | |
| 240 vindex = fd.vtblIndex; | |
| 241 | |
| 242 // Build *(ev + vindex * 4) | |
| 243 ec = el_bin(OPER.OPadd, TYM.TYnptr, ev, el_long(TYM.TYint, vindex * 4)); | |
| 244 ec = el_una(OPER.OPind, TYM.TYnptr, ec); | |
| 245 ec = el_una(OPER.OPind, tybasic(sfunc.Stype.Tty), ec); | |
| 246 } | |
| 247 } | |
| 248 else if (fd && fd.isNested()) | |
| 249 { | |
| 250 assert(!ethis); | |
| 251 ethis = getEthis(Loc(0), irs, fd); | |
| 252 } | |
| 253 | |
| 254 ep = el_param(ep, ethis); | |
| 255 if (ehidden) | |
| 256 ep = el_param(ep, ehidden); // if ehidden goes last | |
| 257 | |
| 258 tyret = tret.totym(); | |
| 259 | |
| 260 // Look for intrinsic functions | |
| 261 if (ec.Eoper == OPER.OPvar && (op = intrinsic_oper(ec.EV.sp.Vsym.Sident.ptr)) != OPER.OPMAX) | |
| 262 { | |
| 263 el_free(ec); | |
| 264 if (OTbinary(op)) | |
| 265 { | |
| 266 ep.Eoper = op; | |
| 267 ep.Ety = tyret; | |
| 268 e = ep; | |
| 269 if (op == OPER.OPscale) | |
| 270 { | |
| 271 elem *et = e.E1; | |
| 272 e.E1() = el_una(OPER.OPd_ld, TYM.TYldouble, e.E1); | |
| 273 e.E1() = el_una(OPER.OPs32_d, TYM.TYdouble, e.E2); | |
| 274 e.E2() = et; | |
| 275 } | |
| 276 else if (op == OPER.OPyl2x || op == OPER.OPyl2xp1) | |
| 277 { | |
| 278 elem *et = e.E1; | |
| 279 e.E1() = e.E2; | |
| 280 e.E2() = et; | |
| 281 } | |
| 282 } | |
| 283 else | |
| 284 e = el_una(op,tyret,ep); | |
| 285 } | |
| 286 else if (ep) | |
| 287 e = el_bin(tf.ispure ? OPER.OPcallns : OPER.OPcall, tyret, ec, ep); | |
| 288 else | |
| 289 e = el_una(tf.ispure ? OPER.OPucallns : OPER.OPucall, tyret, ec); | |
| 290 | |
| 291 if (retmethod == RET.RETstack) | |
| 292 { | |
| 293 e.Ety = TYM.TYnptr; | |
| 294 e = el_una(OPER.OPind, tyret, e); | |
| 295 } | |
| 296 | |
| 297 version (DMDV2) { | |
| 298 if (tf.isref) | |
| 299 { | |
| 300 e.Ety = TYM.TYnptr; | |
| 301 e = el_una(OPER.OPind, tyret, e); | |
| 302 } | |
| 303 } | |
| 304 | |
| 305 if (tybasic(tyret) == TYM.TYstruct) | |
| 306 { | |
| 307 e.Enumbytes = cast(uint)tret.size(); | |
| 308 } | |
| 309 | |
| 310 e = el_combine(eside, e); | |
| 311 return e; | |
| 312 } | |
| 313 | |
| 314 /************************************** | |
| 315 * Fake a struct symbol. | |
| 316 */ | |
| 317 | |
| 318 Classsym* fake_classsym(Identifier id) | |
| 319 { | |
| 320 TYPE* t; | |
| 321 Classsym* scc; | |
| 322 | |
| 323 scc = cast(Classsym*)symbol_calloc(toStringz(id.toChars())); | |
| 324 scc.Sclass = SC.SCstruct; | |
| 325 scc.Sstruct = struct_calloc(); | |
| 326 scc.Sstruct.Sstructalign = 8; | |
| 327 //scc.Sstruct.ptrtype = TYM.TYnptr; | |
| 328 scc.Sstruct.Sflags = STR.STRglobal; | |
| 329 | |
| 330 t = type_alloc(TYM.TYstruct); | |
| 331 t.Tflags |= TF.TFsizeunknown | TF.TFforward; | |
| 332 t.Ttag = scc; // structure tag name | |
| 333 assert(t.Tmangle == 0); | |
| 334 t.Tmangle = mTYman.mTYman_d; | |
| 335 t.Tcount++; | |
| 336 scc.Stype = t; | |
| 337 slist_add(scc); | |
| 338 return scc; | |
| 339 } | |
| 340 | |
| 341 /****************************************** | |
| 342 * Return elem that evaluates to the static frame pointer for function fd. | |
| 343 * If fd is a member function, the returned expression will compute the value | |
| 344 * of fd's 'this' variable. | |
| 345 * This routine is critical for implementing nested functions. | |
| 346 */ | |
| 347 | |
| 348 elem* getEthis(Loc loc, IRState* irs, Dsymbol fd) | |
| 349 { | |
| 350 elem* ethis; | |
| 351 FuncDeclaration thisfd = irs.getFunc(); | |
| 352 Dsymbol fdparent = fd.toParent2(); | |
| 353 | |
| 354 //printf("getEthis(thisfd = '%s', fd = '%s', fdparent = '%s')\n", thisfd.toChars(), fd.toChars(), fdparent.toChars()); | |
| 73 | 355 if (fdparent == thisfd || |
| 356 /* These two are compiler generated functions for the in and out contracts, | |
| 357 * and are called from an overriding function, not just the one they're | |
| 358 * nested inside, so this hack is so they'll pass | |
| 359 */ | |
| 360 fd.ident == Id.require || fd.ident == Id.ensure) | |
| 0 | 361 { |
| 362 /* Going down one nesting level, i.e. we're calling | |
| 363 * a nested function from its enclosing function. | |
| 364 */ | |
| 365 ///version (DMDV2) { | |
| 366 if (irs.sclosure) | |
| 367 ethis = el_var(irs.sclosure); | |
| 368 else | |
| 369 ///} | |
| 370 if (irs.sthis) | |
| 371 { | |
| 372 // We have a 'this' pointer for the current function | |
| 373 ethis = el_var(irs.sthis); | |
| 374 | |
| 375 /* If no variables in the current function's frame are | |
| 376 * referenced by nested functions, then we can 'skip' | |
| 377 * adding this frame into the linked list of stack | |
| 378 * frames. | |
| 379 */ | |
| 380 version (DMDV2) { | |
| 381 bool cond = (thisfd.closureVars.dim != 0); | |
| 382 } else { | |
| 383 bool cond = thisfd.nestedFrameRef; | |
| 384 } | |
| 385 if (cond) | |
| 386 { | |
| 387 /* Local variables are referenced, can't skip. | |
| 388 * Address of 'this' gives the 'this' for the nested | |
| 389 * function | |
| 390 */ | |
| 391 ethis = el_una(OPER.OPaddr, TYM.TYnptr, ethis); | |
| 392 } | |
| 393 } | |
| 394 else | |
| 395 { | |
| 396 /* No 'this' pointer for current function, | |
| 397 * use null if no references to the current function's frame | |
| 398 */ | |
| 399 ethis = el_long(TYM.TYnptr, 0); | |
| 400 version (DMDV2) { | |
| 401 bool cond = (thisfd.closureVars.dim != 0); | |
| 402 } else { | |
| 403 bool cond = thisfd.nestedFrameRef; | |
| 404 } | |
| 405 if (cond) | |
| 406 { | |
| 407 /* OPframeptr is an operator that gets the frame pointer | |
| 408 * for the current function, i.e. for the x86 it gets | |
| 409 * the value of EBP | |
| 410 */ | |
| 411 ethis.Eoper = OPER.OPframeptr; | |
| 412 } | |
| 413 } | |
| 73 | 414 |
| 415 //if (fdparent != thisfd) ethis = el_bin(OPadd, TYnptr, ethis, el_long(TYint, 0x18)); | |
| 0 | 416 } |
| 417 else | |
| 418 { | |
| 419 if (!irs.sthis) // if no frame pointer for this function | |
| 420 { | |
| 421 fd.error(loc, "is a nested function and cannot be accessed from %s", irs.getFunc().toChars()); | |
| 422 ethis = el_long(TYM.TYnptr, 0); // error recovery | |
| 423 } | |
| 424 else | |
| 425 { | |
| 426 ethis = el_var(irs.sthis); | |
| 427 Dsymbol s = thisfd; | |
| 428 while (fd != s) | |
| 429 { | |
| 430 /* Go up a nesting level, i.e. we need to find the 'this' | |
| 431 * of an enclosing function. | |
| 432 * Our 'enclosing function' may also be an inner class. | |
| 433 */ | |
| 434 | |
| 435 //printf("\ts = '%s'\n", s.toChars()); | |
| 436 thisfd = s.isFuncDeclaration(); | |
| 437 if (thisfd) | |
| 438 { | |
| 439 /* Enclosing function is a function. | |
| 440 */ | |
| 441 if (fdparent == s.toParent2()) | |
| 442 break; | |
| 443 | |
| 444 if (thisfd.isNested()) | |
| 445 { | |
| 446 FuncDeclaration p = s.toParent2().isFuncDeclaration(); | |
| 447 version (DMDV2) { | |
| 448 bool cond = !p || p.closureVars.dim; | |
| 449 } else { | |
| 450 bool cond = !p || p.nestedFrameRef; | |
| 451 } | |
| 452 if (cond) { | |
| 453 ethis = el_una(OPER.OPind, TYM.TYnptr, ethis); | |
| 454 } | |
| 455 } | |
| 456 else if (thisfd.vthis) | |
| 457 { | |
| 458 ; | |
| 459 } | |
| 460 else | |
| 461 { | |
| 462 // Error should have been caught by front end | |
| 463 assert(0); | |
| 464 } | |
| 465 } | |
| 466 else | |
| 467 { | |
| 468 /* Enclosed by an aggregate. That means the current | |
| 469 * function must be a member function of that aggregate. | |
| 470 */ | |
| 471 ClassDeclaration cd; | |
| 472 StructDeclaration sd; | |
| 473 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 474 | |
| 475 if (!ad) | |
| 476 goto Lnoframe; | |
| 477 | |
| 478 cd = s.isClassDeclaration(); | |
| 479 | |
| 480 if (cd && fd.isClassDeclaration() && fd.isClassDeclaration().isBaseOf(cd, null)) | |
| 481 break; | |
| 482 | |
| 483 sd = s.isStructDeclaration(); | |
| 484 | |
| 485 if (fd == sd) | |
| 486 break; | |
| 487 | |
| 488 if (!ad.isNested() || !ad.vthis) | |
| 489 { | |
| 490 Lnoframe: | |
| 491 irs.getFunc().error(loc, "cannot get frame pointer to %s", fd.toChars()); | |
| 492 return el_long(TYM.TYnptr, 0); // error recovery | |
| 493 } | |
| 494 | |
| 495 ethis = el_bin(OPER.OPadd, TYM.TYnptr, ethis, el_long(TYM.TYint, ad.vthis.offset)); | |
| 496 ethis = el_una(OPER.OPind, TYM.TYnptr, ethis); | |
| 497 | |
| 498 if (fdparent == s.toParent2()) | |
| 499 break; | |
| 500 | |
| 501 if (auto fdd = s.toParent2().isFuncDeclaration()) | |
| 502 { | |
| 503 /* Remember that frames for functions that have no | |
| 504 * nested references are skipped in the linked list | |
| 505 * of frames. | |
| 506 */ | |
| 507 version (DMDV2) { | |
| 508 bool cond = (fdd.closureVars.dim != 0); | |
| 509 } else { | |
| 510 bool cond = fdd.nestedFrameRef; | |
| 511 } | |
| 512 if (cond) { | |
| 513 ethis = el_una(OPER.OPind, TYM.TYnptr, ethis); | |
| 514 } | |
| 515 break; | |
| 516 } | |
| 517 } | |
| 518 s = s.toParent2(); | |
| 519 assert(s); | |
| 520 } | |
| 521 } | |
| 522 } | |
| 523 | |
| 524 static if (false) { | |
| 525 printf("ethis:\n"); | |
| 526 elem_print(ethis); | |
| 527 printf("\n"); | |
| 528 } | |
| 529 | |
| 530 return ethis; | |
| 531 } | |
| 532 | |
| 533 /***************************************** | |
| 534 * Convert array to a pointer to the data. | |
| 535 */ | |
| 536 | |
| 537 elem* array_toPtr(Type t, elem* e) | |
| 538 { | |
| 539 //printf("array_toPtr()\n"); | |
| 540 //elem_print(e); | |
| 541 t = t.toBasetype(); | |
| 542 switch (t.ty) | |
| 543 { | |
| 544 case TY.Tpointer: | |
| 545 break; | |
| 546 | |
| 547 case TY.Tarray: | |
| 548 case TY.Tdelegate: | |
| 549 if (e.Eoper == OPER.OPcomma) | |
| 550 { | |
| 551 e.Ety = TYM.TYnptr; | |
| 552 e.E2() = array_toPtr(t, e.E2); | |
| 553 } | |
| 554 else if (e.Eoper == OPER.OPpair) | |
| 555 { | |
| 556 e.Eoper = OPER.OPcomma; | |
| 557 e.Ety = TYM.TYnptr; | |
| 558 } | |
| 559 else | |
| 560 { | |
| 561 static if (true) { | |
| 562 e = el_una(OPER.OPmsw, TYM.TYnptr, e); | |
| 563 } else { | |
| 564 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 565 e = el_bin(OPER.OPadd, TYM.TYnptr, e, el_long(TYM.TYint, 4)); | |
| 566 e = el_una(OPER.OPind, TYM.TYnptr, e); | |
| 567 } | |
| 568 } | |
| 569 break; | |
| 570 | |
| 571 case TY.Tsarray: | |
| 572 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 573 break; | |
| 574 | |
| 575 default: | |
| 576 ///t.print(); | |
| 577 assert(0); | |
| 578 } | |
| 579 return e; | |
| 580 } | |
| 581 | |
| 582 /******************************************* | |
| 583 * Take address of an elem. | |
| 584 */ | |
| 585 | |
| 586 elem* addressElem(elem* e, Type t) | |
| 587 { | |
| 588 elem** pe; | |
| 589 | |
| 590 //printf("addressElem()\n"); | |
| 591 | |
| 592 for (pe = &e; (*pe).Eoper == OPER.OPcomma; pe = &(*pe).E2()) { | |
| 593 ; | |
| 594 } | |
| 595 | |
| 596 if ((*pe).Eoper != OPER.OPvar && (*pe).Eoper != OPER.OPind) | |
| 597 { | |
| 598 Symbol* stmp; | |
| 599 elem* eeq; | |
| 600 elem* ee = *pe; | |
| 601 type* tx; | |
| 602 | |
| 603 // Convert to ((tmp=ee),tmp) | |
| 604 TY ty; | |
| 605 if (t && ((ty = t.toBasetype().ty) == TY.Tstruct || ty == TY.Tsarray)) | |
| 606 tx = t.toCtype(); | |
| 607 else | |
| 608 tx = type_fake(ee.Ety); | |
| 609 stmp = symbol_genauto(tx); | |
| 610 eeq = el_bin(OPER.OPeq,ee.Ety,el_var(stmp),ee); | |
| 611 | |
| 612 if (tybasic(ee.Ety) == TYM.TYstruct) | |
| 613 { | |
| 614 eeq.Eoper = OPER.OPstreq; | |
| 615 eeq.Enumbytes = ee.Enumbytes; | |
| 616 } | |
| 617 else if (tybasic(ee.Ety) == TYM.TYarray) | |
| 618 { | |
| 619 eeq.Eoper = OPER.OPstreq; | |
| 620 eeq.Ety = TYM.TYstruct; | |
| 621 eeq.Ejty = cast(ubyte)eeq.Ety; | |
| 622 eeq.Enumbytes = cast(uint)t.size(); | |
| 623 } | |
| 624 *pe = el_bin(OPER.OPcomma, ee.Ety, eeq, el_var(stmp)); | |
| 625 } | |
| 626 | |
| 627 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 628 return e; | |
| 629 } | |
| 630 | |
| 631 /******************************************* | |
| 632 * Convert intrinsic function to operator. | |
| 633 * Returns that operator, -1 if not an intrinsic function. | |
| 634 */ | |
| 635 | |
| 636 extern (C++) extern int intrinsic_op(char* name); | |
| 637 | |
| 638 OPER intrinsic_oper(const(char)* name) | |
| 639 { | |
| 640 int result = intrinsic_op(cast(char*)name); | |
| 641 if (result == -1) return OPER.OPMAX; | |
| 642 return cast(OPER)result; | |
| 643 } | |
| 644 | |
| 645 /************************************** | |
| 646 */ | |
| 647 | |
| 648 elem* Dsymbol_toElem(Dsymbol s, IRState *irs) | |
| 649 { | |
| 650 elem *e = null; | |
| 651 Symbol* sp; | |
| 652 AttribDeclaration ad; | |
| 653 VarDeclaration vd; | |
| 654 ClassDeclaration cd; | |
| 655 StructDeclaration sd; | |
| 656 FuncDeclaration fd; | |
| 657 TemplateMixin tm; | |
| 658 TupleDeclaration td; | |
| 659 TypedefDeclaration tyd; | |
| 660 | |
| 661 //printf("Dsymbol_toElem() %s\n", s.toChars()); | |
| 662 ad = s.isAttribDeclaration(); | |
| 663 if (ad) | |
| 664 { | |
| 665 Array decl = ad.include(null, null); | |
| 666 if (decl && decl.dim) | |
| 667 { | |
| 668 for (size_t i = 0; i < decl.dim; i++) | |
| 669 { | |
| 670 s = cast(Dsymbol)decl.data[i]; | |
| 671 e = el_combine(e, Dsymbol_toElem(s, irs)); | |
| 672 } | |
| 673 } | |
| 674 } | |
| 675 else if ((vd = s.isVarDeclaration()) !is null) | |
| 676 { | |
| 677 s = s.toAlias(); | |
| 678 if (s != vd) | |
| 679 return Dsymbol_toElem(s, irs); | |
| 680 if (vd.isStatic() || vd.storage_class & (STC.STCextern | STC.STCtls | STC.STCgshared)) | |
| 681 vd.toObjFile(0); | |
| 682 else | |
| 683 { | |
| 684 sp = s.toSymbol(); | |
| 685 symbol_add(sp); | |
| 686 //printf("\tadding symbol '%s'\n", sp.Sident); | |
| 687 if (vd.init) | |
| 688 { | |
| 689 ExpInitializer ie = vd.init.isExpInitializer(); | |
| 690 if (ie) { | |
| 691 e = ie.exp.toElem(irs); | |
| 692 } | |
| 693 } | |
| 694 } | |
| 695 } | |
| 696 else if ((cd = s.isClassDeclaration()) !is null) | |
| 697 { | |
| 698 irs.deferToObj.push(cast(void*)s); | |
| 699 } | |
| 700 else if ((sd = s.isStructDeclaration()) !is null) | |
| 701 { | |
| 702 irs.deferToObj.push(cast(void*)sd); | |
| 703 } | |
| 704 else if ((fd = s.isFuncDeclaration()) !is null) | |
| 705 { | |
| 706 //printf("function %s\n", fd.toChars()); | |
| 707 irs.deferToObj.push(cast(void*)fd); | |
| 708 } | |
| 709 else if ((tm = s.isTemplateMixin()) !is null) | |
| 710 { | |
| 711 //printf("%s\n", tm.toChars()); | |
| 712 if (tm.members) | |
| 713 { | |
| 714 for (size_t i = 0; i < tm.members.dim; i++) | |
| 715 { | |
| 716 Dsymbol sm = cast(Dsymbol)tm.members.data[i]; | |
| 717 e = el_combine(e, Dsymbol_toElem(sm, irs)); | |
| 718 } | |
| 719 } | |
| 720 } | |
| 721 else if ((td = s.isTupleDeclaration()) !is null) | |
| 722 { | |
| 723 for (size_t i = 0; i < td.objects.dim; i++) | |
| 724 { | |
| 725 Object o = cast(Object)td.objects.data[i]; | |
| 726 ///if (o.dyncast() == DYNCAST_EXPRESSION) | |
| 727 if (Expression eo = cast(Expression)o) | |
| 728 { | |
| 729 if (eo.op == TOK.TOKdsymbol) | |
| 730 { | |
| 731 DsymbolExp se = cast(DsymbolExp)eo; | |
| 732 e = el_combine(e, Dsymbol_toElem(se.s, irs)); | |
| 733 } | |
| 734 } | |
| 735 } | |
| 736 } | |
| 737 else if ((tyd = s.isTypedefDeclaration()) !is null) | |
| 738 { | |
| 739 irs.deferToObj.push(cast(void*)tyd); | |
| 740 } | |
| 741 | |
| 742 return e; | |
| 743 } | |
| 744 | |
| 745 /************************************** | |
| 746 * Given an expression e that is an array, | |
| 747 * determine and set the 'length' variable. | |
| 748 * Input: | |
| 749 * lengthVar Symbol of 'length' variable | |
| 750 * &e expression that is the array | |
| 751 * t1 Type of the array | |
| 752 * Output: | |
| 753 * e is rewritten to avoid side effects | |
| 754 * Returns: | |
| 755 * expression that initializes 'length' | |
| 756 */ | |
| 757 | |
| 758 elem* resolveLengthVar(VarDeclaration lengthVar, elem** pe, Type t1) | |
| 759 { | |
| 760 //printf("resolveLengthVar()\n"); | |
| 761 elem* einit = null; | |
| 762 | |
| 763 if (lengthVar && !(lengthVar.storage_class & STC.STCconst)) | |
| 764 { | |
| 765 elem* elength; | |
| 766 Symbol* slength; | |
| 767 | |
| 768 if (t1.ty == TY.Tsarray) | |
| 769 { | |
| 770 TypeSArray tsa = cast(TypeSArray)t1; | |
| 771 long length = tsa.dim.toInteger(); | |
| 772 | |
| 773 elength = el_long(TYM.TYuint, length); | |
| 774 goto L3; | |
| 775 } | |
| 776 else if (t1.ty == TY.Tarray) | |
| 777 { | |
| 778 elength = *pe; | |
| 779 *pe = el_same(&elength); | |
| 780 elength = el_una(OPER.OP64_32, TYM.TYuint, elength); | |
| 781 | |
| 782 L3: | |
| 783 slength = lengthVar.toSymbol(); | |
| 784 //symbol_add(slength); | |
| 785 | |
| 786 einit = el_bin(OPER.OPeq, TYM.TYuint, el_var(slength), elength); | |
| 787 } | |
| 788 } | |
| 789 return einit; | |
| 790 } | |
| 791 | |
| 792 /******************************************* | |
| 793 * Set an array pointed to by eptr to evalue: | |
| 794 * eptr[0..edim] = evalue; | |
| 795 * Input: | |
| 796 * eptr where to write the data to | |
| 797 * evalue value to write | |
| 798 * edim number of times to write evalue to eptr[] | |
| 799 * tb type of evalue | |
| 800 */ | |
| 801 | |
| 802 elem* setArray(elem* eptr, elem* edim, Type tb, elem* evalue, IRState* irs, int op) | |
| 803 { | |
| 804 int r; | |
| 805 elem* e; | |
| 806 int sz = cast(int)tb.size(); | |
| 807 | |
| 808 if (tb.ty == TY.Tfloat80 || tb.ty == TY.Timaginary80) | |
| 809 r = RTLSYM.RTLSYM_MEMSET80; | |
| 810 else if (tb.ty == TY.Tcomplex80) | |
| 811 r = RTLSYM.RTLSYM_MEMSET160; | |
| 812 else if (tb.ty == TY.Tcomplex64) | |
| 813 r = RTLSYM.RTLSYM_MEMSET128; | |
| 814 else | |
| 815 { | |
| 816 switch (sz) | |
| 817 { | |
| 818 case 1: r = RTLSYM.RTLSYM_MEMSET8; break; | |
| 819 case 2: r = RTLSYM.RTLSYM_MEMSET16; break; | |
| 820 case 4: r = RTLSYM.RTLSYM_MEMSET32; break; | |
| 821 case 8: r = RTLSYM.RTLSYM_MEMSET64; break; | |
| 822 default: r = RTLSYM.RTLSYM_MEMSETN; break; | |
| 823 } | |
| 824 | |
| 825 /* Determine if we need to do postblit | |
| 826 */ | |
| 827 if (op != TOK.TOKblit) | |
| 828 { | |
| 829 StructDeclaration sd = needsPostblit(tb); | |
| 830 if (sd) | |
| 831 { | |
| 832 /* Need to do postblit. | |
| 833 * void *_d_arraysetassign(void *p, void *value, int dim, TypeInfo ti); | |
| 834 */ | |
| 835 r = (op == TOK.TOKconstruct) ? RTLSYM.RTLSYM_ARRAYSETCTOR : RTLSYM.RTLSYM_ARRAYSETASSIGN; | |
| 836 evalue = el_una(OPER.OPaddr, TYM.TYnptr, evalue); | |
| 837 Expression ti = tb.getTypeInfo(null); | |
| 838 elem* eti = ti.toElem(irs); | |
| 839 e = el_params(eti, edim, evalue, eptr, null); | |
| 840 e = el_bin(OPER.OPcall, TYM.TYnptr, el_var(rtlsym[r]), e); | |
| 841 return e; | |
| 842 } | |
| 843 } | |
| 844 | |
| 845 if (r == RTLSYM.RTLSYM_MEMSETN) | |
| 846 { | |
| 847 // void *_memsetn(void *p, void *value, int dim, int sizelem) | |
| 848 evalue = el_una(OPER.OPaddr, TYM.TYnptr, evalue); | |
| 849 elem *esz = el_long(TYM.TYint, sz); | |
| 850 e = el_params(esz, edim, evalue, eptr, null); | |
| 851 e = el_bin(OPER.OPcall, TYM.TYnptr, el_var(rtlsym[r]), e); | |
| 852 return e; | |
| 853 } | |
| 854 } | |
| 855 if (sz > 1 && sz <= 8 && evalue.Eoper == OPER.OPconst && el_allbits(evalue, 0)) | |
| 856 { | |
| 857 r = RTLSYM.RTLSYM_MEMSET8; | |
| 858 edim = el_bin(OPER.OPmul, TYM.TYuint, edim, el_long(TYM.TYuint, sz)); | |
| 859 } | |
| 860 | |
| 861 if (tybasic(evalue.Ety) == TYM.TYstruct) | |
| 862 { | |
| 863 evalue = el_una(OPER.OPstrpar, TYM.TYstruct, evalue); | |
| 864 evalue.Enumbytes = evalue.E1.Enumbytes; | |
| 865 assert(evalue.Enumbytes); | |
| 866 } | |
| 867 | |
| 868 // Be careful about parameter side effect ordering | |
| 869 if (r == RTLSYM.RTLSYM_MEMSET8) | |
| 870 { | |
| 871 e = el_param(edim, evalue); | |
| 872 e = el_bin(OPER.OPmemset, TYM.TYnptr, eptr, e); | |
| 873 } | |
| 874 else | |
| 875 { | |
| 876 e = el_params(edim, evalue, eptr, null); | |
| 877 e = el_bin(OPER.OPcall, TYM.TYnptr, el_var(rtlsym[r]), e); | |
| 878 } | |
| 879 return e; | |
| 880 } | |
| 881 | |
| 882 /************************* | |
| 883 * Initialize the hidden aggregate member, vthis, with | |
| 884 * the context pointer. | |
| 885 * Returns: | |
| 886 * *(ey + ad.vthis.offset) = this; | |
| 887 */ | |
| 888 version (DMDV2) { | |
| 889 elem* setEthis(Loc loc, IRState* irs, elem* ey, AggregateDeclaration ad) | |
| 890 { | |
| 891 elem* ethis; | |
| 892 FuncDeclaration thisfd = irs.getFunc(); | |
| 893 int offset = 0; | |
| 894 Dsymbol cdp = ad.toParent2(); // class/func we're nested in | |
| 895 | |
| 896 //printf("setEthis(ad = %s, cdp = %s, thisfd = %s)\n", ad.toChars(), cdp.toChars(), thisfd.toChars()); | |
| 897 | |
| 898 if (cdp is thisfd) | |
| 899 { | |
| 900 /* Class we're new'ing is a local class in this function: | |
| 901 * void thisfd() { class ad { } } | |
| 902 */ | |
| 903 if (irs.sclosure) | |
| 904 ethis = el_var(irs.sclosure); | |
| 905 else if (irs.sthis) | |
| 906 { | |
| 907 /// version (DMDV2) { | |
| 908 if (thisfd.closureVars.dim) | |
| 909 /// } else { | |
| 910 /// if (thisfd.nestedFrameRef) | |
| 911 /// } | |
| 912 { | |
| 913 ethis = el_ptr(irs.sthis); | |
| 914 } | |
| 915 else | |
| 916 ethis = el_var(irs.sthis); | |
| 917 } | |
| 918 else | |
| 919 { | |
| 920 ethis = el_long(TYM.TYnptr, 0); | |
| 921 /// version (DMDV2) { | |
| 922 if (thisfd.closureVars.dim) | |
| 923 /// } else { | |
| 924 /// if (thisfd.nestedFrameRef) | |
| 925 /// } | |
| 926 { | |
| 927 ethis.Eoper = OPER.OPframeptr; | |
| 928 } | |
| 929 } | |
| 930 } | |
| 931 else if (thisfd.vthis && ( | |
| 932 cdp == thisfd.toParent2() || ( | |
| 933 cdp.isClassDeclaration() && cdp.isClassDeclaration().isBaseOf(thisfd.toParent2().isClassDeclaration(), &offset) | |
| 934 ) | |
| 935 ) | |
| 936 ) | |
| 937 { | |
| 938 /* Class we're new'ing is at the same level as thisfd | |
| 939 */ | |
| 940 assert(offset == 0); // BUG: should handle this case | |
| 941 ethis = el_var(irs.sthis); | |
| 942 } | |
| 943 else | |
| 944 { | |
| 945 ethis = getEthis(loc, irs, ad.toParent2()); | |
| 946 ethis = el_una(OPER.OPaddr, TYM.TYnptr, ethis); | |
| 947 } | |
| 948 | |
| 949 ey = el_bin(OPER.OPadd, TYM.TYnptr, ey, el_long(TYM.TYint, ad.vthis.offset)); | |
| 950 ey = el_una(OPER.OPind, TYM.TYnptr, ey); | |
| 951 ey = el_bin(OPER.OPeq, TYM.TYnptr, ey, ethis); | |
| 952 | |
| 953 return ey; | |
| 954 } | |
| 955 } | |
| 956 | |
| 957 /******************************************** | |
| 958 * Determine if t is an array of structs that need a postblit. | |
| 959 */ | |
| 960 StructDeclaration needsPostblit(Type t) | |
| 961 { | |
| 962 t = t.toBasetype(); | |
| 963 | |
| 964 while (t.ty == TY.Tsarray) | |
| 965 t = t.nextOf().toBasetype(); | |
| 966 | |
| 967 if (t.ty == TY.Tstruct) | |
| 968 { | |
| 969 StructDeclaration sd = (cast(TypeStruct)t).sym; | |
| 970 if (sd.postblit) | |
| 971 return sd; | |
| 972 } | |
| 973 | |
| 974 return null; | |
| 975 } | |
| 976 | |
| 977 /***************************************** | |
| 978 * Convert array to a dynamic array. | |
| 979 */ | |
| 980 | |
| 981 elem* array_toDarray(Type t, elem* e) | |
| 982 { | |
| 983 uint dim; | |
| 984 elem* ef = null; | |
| 985 elem* ex; | |
| 986 | |
| 987 //printf("array_toDarray(t = %s)\n", t.toChars()); | |
| 988 //elem_print(e); | |
| 989 t = t.toBasetype(); | |
| 990 switch (t.ty) | |
| 991 { | |
| 992 case TY.Tarray: | |
| 993 break; | |
| 994 | |
| 995 case TY.Tsarray: | |
| 996 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 997 dim = cast(uint)(cast(TypeSArray)t).dim.toInteger(); | |
| 998 e = el_pair(TYM.TYullong, el_long(TYM.TYint, dim), e); | |
| 999 break; | |
| 1000 | |
| 1001 default: | |
| 1002 L1: | |
| 1003 switch (e.Eoper) | |
| 1004 { | |
| 1005 case OPER.OPconst: | |
| 1006 { | |
| 1007 size_t len = tysize[tybasic(e.Ety)]; | |
| 1008 elem* es = el_calloc(); | |
| 1009 es.Eoper = OPER.OPstring; | |
| 1010 | |
| 1011 // Match MEM_PH_FREE for OPstring in ztc\el.c | |
|
5
63623152e82a
Fixed memory corruption bug which was introduced when attempting to restore GC functionality
dkoroskin <>
parents:
4
diff
changeset
|
1012 es.EV.ss.Vstring = cast(char*)malloc(len); /// ! |
| 0 | 1013 memcpy(es.EV.ss.Vstring, &e.EV, len); |
| 1014 | |
| 1015 es.EV.ss.Vstrlen = len; | |
| 1016 es.Ety = TYM.TYnptr; | |
| 1017 e = es; | |
| 1018 break; | |
| 1019 } | |
| 1020 | |
| 1021 case OPER.OPvar: | |
| 1022 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 1023 break; | |
| 1024 | |
| 1025 case OPER.OPcomma: | |
| 1026 ef = el_combine(ef, e.E1); | |
| 1027 ex = e; | |
| 1028 e = e.E2; | |
| 1029 ex.E1() = null; | |
| 1030 ex.E2() = null; | |
| 1031 el_free(ex); | |
| 1032 goto L1; | |
| 1033 | |
| 1034 case OPER.OPind: | |
| 1035 ex = e; | |
| 1036 e = e.E1; | |
| 1037 ex.E1() = null; | |
| 1038 ex.E2() = null; | |
| 1039 el_free(ex); | |
| 1040 break; | |
| 1041 | |
| 1042 default: | |
| 1043 { | |
| 1044 // Copy expression to a variable and take the | |
| 1045 // address of that variable. | |
| 1046 Symbol* stmp; | |
| 1047 tym_t ty = tybasic(e.Ety); | |
| 1048 | |
| 1049 if (ty == TYM.TYstruct) | |
| 1050 { | |
| 1051 if (e.Enumbytes == 4) | |
| 1052 ty = TYM.TYint; | |
| 1053 else if (e.Enumbytes == 8) | |
| 1054 ty = TYM.TYllong; | |
| 1055 } | |
| 1056 e.Ety = ty; | |
| 1057 stmp = symbol_genauto(type_fake(ty)); | |
| 1058 e = el_bin(OPER.OPeq, e.Ety, el_var(stmp), e); | |
| 1059 e = el_bin(OPER.OPcomma, TYM.TYnptr, e, el_una(OPER.OPaddr, TYM.TYnptr, el_var(stmp))); | |
| 1060 break; | |
| 1061 } | |
| 1062 } | |
| 1063 dim = 1; | |
| 1064 e = el_pair(TYM.TYullong, el_long(TYM.TYint, dim), e); | |
| 1065 break; | |
| 1066 } | |
| 1067 | |
| 1068 return el_combine(ef, e); | |
| 1069 } | |
| 1070 | |
| 1071 elem* sarray_toDarray(Loc loc, Type tfrom, Type tto, elem* e) | |
| 1072 { | |
| 1073 //printf("sarray_toDarray()\n"); | |
| 1074 //elem_print(e); | |
| 1075 | |
| 1076 elem* elen; | |
| 1077 uint dim = cast(uint)(cast(TypeSArray)tfrom).dim.toInteger(); | |
| 1078 | |
| 1079 if (tto) | |
| 1080 { | |
| 1081 uint fsize = cast(uint)tfrom.nextOf().size(); | |
| 1082 uint tsize = cast(uint)tto.nextOf().size(); | |
| 1083 | |
| 1084 if ((dim * fsize) % tsize != 0) | |
| 1085 { | |
| 1086 Lerr: | |
| 1087 error(loc, "cannot cast %s to %s since sizes don't line up", tfrom.toChars(), tto.toChars()); | |
| 1088 } | |
| 1089 dim = (dim * fsize) / tsize; | |
| 1090 } | |
| 1091 | |
| 1092 L1: | |
| 1093 elen = el_long(TYM.TYint, dim); | |
| 1094 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 1095 e = el_pair(TYM.TYullong, elen, e); | |
| 1096 return e; | |
| 1097 } | |
| 1098 | |
| 1099 elem* eval_Darray(IRState* irs, Expression e) | |
| 1100 { | |
| 1101 elem* ex = e.toElem(irs); | |
| 1102 return array_toDarray(e.type, ex); | |
| 1103 } | |
| 1104 | |
| 1105 /*********************************************** | |
| 1106 * Generate code to set index into scope table. | |
| 1107 */ | |
| 1108 | |
| 1109 void setScopeIndex(Blockx* blx, block* b, int scope_index) | |
| 1110 { | |
| 1111 version (SEH) { | |
| 1112 block_appendexp(b, nteh_setScopeTableIndex(blx, scope_index)); | |
| 1113 } | |
| 1114 } | |
| 1115 | |
| 1116 /**************************************** | |
| 1117 * Create a static symbol we can hang DT initializers onto. | |
| 1118 */ | |
| 1119 | |
| 1120 Symbol* static_sym() | |
| 1121 { | |
| 1122 Symbol* s; | |
| 1123 type* t; | |
| 1124 | |
| 1125 t = type_alloc(TYint); | |
| 1126 t.Tcount++; | |
| 1127 s = symbol_calloc("internal"); | |
| 1128 s.Sclass = SCstatic; | |
| 1129 s.Sfl = FLextern; | |
| 1130 s.Sflags |= SFLnodebug; | |
| 1131 s.Stype = t; | |
| 1132 version (ELFOBJ_OR_MACHOBJ) { | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
5
diff
changeset
|
1133 s.Sseg = Segment.DATA; |
| 0 | 1134 } |
| 1135 slist_add(s); | |
| 1136 return s; | |
| 1137 } | |
| 1138 | |
| 1139 /************************************** | |
| 1140 * Convert label to block. | |
| 1141 */ | |
| 1142 | |
| 1143 block* labelToBlock(Loc loc, Blockx *blx, LabelDsymbol label) | |
| 1144 { | |
| 1145 LabelStatement s; | |
| 1146 | |
| 1147 if (!label.statement) | |
| 1148 { | |
| 1149 error(loc, "undefined label %s", label.toChars()); | |
| 1150 return null; | |
| 1151 } | |
| 1152 | |
| 1153 s = label.statement; | |
| 1154 if (!s.lblock) | |
| 1155 { | |
| 1156 s.lblock = block_calloc(blx); | |
| 1157 if (s.isReturnLabel) | |
| 1158 s.lblock.Btry = null; | |
| 1159 } | |
| 1160 return s.lblock; | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
5
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changeset
|
1161 } |
| 67 | 1162 |
| 1163 /******************************************* | |
| 1164 * Generate elem to zero fill contents of Symbol stmp | |
| 1165 * from *poffset..offset2. | |
| 1166 * May store anywhere from 0..maxoff, as this function | |
| 1167 * tries to use aligned int stores whereever possible. | |
| 1168 * Update *poffset to end of initialized hole; *poffset will be >= offset2. | |
| 1169 */ | |
| 1170 | |
| 1171 elem* fillHole(Symbol* stmp, size_t* poffset, size_t offset2, size_t maxoff) | |
| 1172 { | |
| 1173 elem* e = null; | |
| 1174 int basealign = 1; | |
| 1175 | |
| 1176 while (*poffset < offset2) | |
| 1177 { | |
| 1178 tym_t ty; | |
| 1179 elem* e1; | |
| 1180 | |
| 1181 if (tybasic(stmp.Stype.Tty) == TYnptr) | |
| 1182 e1 = el_var(stmp); | |
| 1183 else | |
| 1184 e1 = el_ptr(stmp); | |
| 1185 | |
| 1186 if (basealign) | |
| 1187 *poffset &= ~3; | |
| 1188 | |
| 1189 basealign = 1; | |
| 1190 size_t sz = maxoff - *poffset; | |
| 1191 switch (sz) | |
| 1192 { | |
| 1193 case 1: ty = TYchar; break; | |
| 1194 case 2: ty = TYshort; break; | |
| 1195 case 3: | |
| 1196 ty = TYshort; | |
| 1197 basealign = 0; | |
| 1198 break; | |
| 1199 default: | |
| 1200 ty = TYlong; | |
| 1201 break; | |
| 1202 } | |
| 1203 e1 = el_bin(OPadd, TYnptr, e1, el_long(TYsize_t, *poffset)); | |
| 1204 e1 = el_una(OPind, ty, e1); | |
| 1205 e1 = el_bin(OPeq, ty, e1, el_long(ty, 0)); | |
| 1206 e = el_combine(e, e1); | |
| 1207 *poffset += tysize[ty]; | |
| 1208 } | |
| 1209 return e; | |
| 1210 } |