Mercurial > projects > ddmd
annotate dmd/SliceExp.d @ 191:52188e7e3fb5
Fixed deprecated features, now compiles with DMD2.058
Also changed Array allocation policy:
Now doesn't reallocate but malloc's, followed by a memcpy (no free).
(this fixes a crash while compiling druntime. Same bug in dmd)
| author | korDen@korDen-pc |
|---|---|
| date | Sun, 25 Mar 2012 03:11:12 +0400 |
| parents | b0d41ff5e0df |
| children |
| rev | line source |
|---|---|
| 72 | 1 module dmd.SliceExp; |
| 2 | |
| 114 | 3 import dmd.common; |
| 72 | 4 import dmd.Expression; |
| 5 import dmd.expression.ArrayLength; | |
| 6 import dmd.backend.elem; | |
| 7 import dmd.UnaExp; | |
| 8 import dmd.Identifier; | |
| 9 import dmd.IdentifierExp; | |
| 10 import dmd.ArrayExp; | |
| 11 import dmd.STC; | |
| 0 | 12 import dmd.InterState; |
| 13 import dmd.ScopeDsymbol; | |
| 14 import dmd.WANT; | |
| 178 | 15 import dmd.Util; |
| 0 | 16 import dmd.ArrayScopeSymbol; |
| 17 import dmd.CallExp; | |
| 18 import dmd.DotIdExp; | |
| 19 import dmd.Id; | |
| 20 import dmd.expression.Util; | |
| 21 import dmd.TypeTuple; | |
| 22 import dmd.TupleExp; | |
| 23 import dmd.TypeStruct; | |
| 24 import dmd.TypeClass; | |
| 25 import dmd.TY; | |
| 26 import dmd.Type; | |
| 72 | 27 import dmd.AggregateDeclaration; |
| 28 import dmd.OutBuffer; | |
| 29 import dmd.Loc; | |
| 30 import dmd.Scope; | |
| 31 import dmd.InlineCostState; | |
| 0 | 32 import dmd.VarDeclaration; |
| 33 import dmd.ErrorExp; | |
| 34 import dmd.TypeExp; | |
|
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35 import dmd.Parameter; |
| 72 | 36 import dmd.ExpInitializer; |
| 37 import dmd.IRState; | |
| 38 import dmd.InlineDoState; | |
| 39 import dmd.ArrayTypes; | |
| 40 import dmd.HdrGenState; | |
| 41 import dmd.InlineScanState; | |
| 0 | 42 import dmd.TOK; |
| 43 import dmd.TypeSArray; | |
| 44 import dmd.GlobalExpressions; | |
| 45 import dmd.Global; | |
| 46 import dmd.PREC; | |
| 47 | |
| 48 import dmd.expression.Slice; | |
| 49 import dmd.expression.Util; | |
| 50 | |
| 51 import dmd.backend.Util; | |
| 52 import dmd.backend.Symbol; | |
| 53 import dmd.backend.OPER; | |
| 54 import dmd.backend.TYM; | |
| 55 import dmd.codegen.Util; | |
| 56 | |
| 72 | 57 import core.stdc.string; |
| 58 | |
|
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59 import dmd.DDMDExtensions; |
|
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60 |
| 0 | 61 class SliceExp : UnaExp |
| 62 { | |
|
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63 mixin insertMemberExtension!(typeof(this)); |
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64 |
| 0 | 65 Expression upr; // null if implicit 0 |
| 66 Expression lwr; // null if implicit [length - 1] | |
| 67 | |
| 68 VarDeclaration lengthVar = null; | |
| 69 | |
| 70 this(Loc loc, Expression e1, Expression lwr, Expression upr) | |
| 72 | 71 { |
| 178 | 72 register(); |
| 0 | 73 super(loc, TOK.TOKslice, SliceExp.sizeof, e1); |
| 74 this.upr = upr; | |
| 75 this.lwr = lwr; | |
| 76 } | |
| 77 | |
| 72 | 78 override Expression syntaxCopy() |
| 0 | 79 { |
| 72 | 80 Expression lwr = null; |
| 81 if (this.lwr) | |
| 82 lwr = this.lwr.syntaxCopy(); | |
| 83 | |
| 84 Expression upr = null; | |
| 85 if (this.upr) | |
| 86 upr = this.upr.syntaxCopy(); | |
| 87 | |
| 53 | 88 return new SliceExp(loc, e1.syntaxCopy(), lwr, upr); |
| 0 | 89 } |
| 90 | |
| 72 | 91 override Expression semantic(Scope sc) |
| 0 | 92 { |
| 93 Expression e; | |
| 94 AggregateDeclaration ad; | |
| 95 //FuncDeclaration fd; | |
| 96 ScopeDsymbol sym; | |
| 97 | |
| 98 version (LOGSEMANTIC) { | |
| 99 printf("SliceExp.semantic('%s')\n", toChars()); | |
| 100 } | |
| 101 if (type) | |
| 102 return this; | |
| 103 | |
| 104 UnaExp.semantic(sc); | |
| 105 e1 = resolveProperties(sc, e1); | |
| 106 | |
| 107 e = this; | |
| 108 | |
| 109 Type t = e1.type.toBasetype(); | |
| 110 if (t.ty == Tpointer) | |
| 111 { | |
| 112 if (!lwr || !upr) | |
| 113 error("need upper and lower bound to slice pointer"); | |
| 114 } | |
| 115 else if (t.ty == Tarray) | |
| 116 { | |
| 117 } | |
| 118 else if (t.ty == Tsarray) | |
| 119 { | |
| 120 } | |
| 121 else if (t.ty == Tclass) | |
| 122 { | |
| 123 ad = (cast(TypeClass)t).sym; | |
| 124 goto L1; | |
| 125 } | |
| 126 else if (t.ty == Tstruct) | |
| 127 { | |
| 128 ad = (cast(TypeStruct)t).sym; | |
| 129 | |
| 130 L1: | |
| 131 if (search_function(ad, Id.slice)) | |
| 132 { | |
| 133 // Rewrite as e1.slice(lwr, upr) | |
| 134 e = new DotIdExp(loc, e1, Id.slice); | |
| 135 | |
| 136 if (lwr) | |
| 137 { | |
| 138 assert(upr); | |
| 139 e = new CallExp(loc, e, lwr, upr); | |
| 140 } | |
| 141 else | |
| 178 | 142 { |
| 0 | 143 assert(!upr); |
| 144 e = new CallExp(loc, e); | |
| 145 } | |
| 146 e = e.semantic(sc); | |
| 147 return e; | |
| 148 } | |
| 149 goto Lerror; | |
| 150 } | |
| 151 else if (t.ty == Ttuple) | |
| 152 { | |
| 153 if (!lwr && !upr) | |
| 154 return e1; | |
| 155 if (!lwr || !upr) | |
| 156 { error("need upper and lower bound to slice tuple"); | |
| 157 goto Lerror; | |
| 158 } | |
| 159 } | |
| 160 else | |
| 161 goto Lerror; | |
| 162 | |
| 163 { | |
| 164 Scope sc2 = sc; | |
| 165 if (t.ty == Tsarray || t.ty == Tarray || t.ty == Ttuple) | |
| 166 { | |
| 167 sym = new ArrayScopeSymbol(sc, this); | |
| 168 sym.loc = loc; | |
| 169 sym.parent = sc.scopesym; | |
| 170 sc2 = sc.push(sym); | |
| 171 } | |
| 172 | |
| 173 if (lwr) | |
| 178 | 174 { |
| 0 | 175 lwr = lwr.semantic(sc2); |
| 176 lwr = resolveProperties(sc2, lwr); | |
| 177 lwr = lwr.implicitCastTo(sc2, Type.tsize_t); | |
| 178 } | |
| 179 if (upr) | |
| 178 | 180 { |
| 0 | 181 upr = upr.semantic(sc2); |
| 182 upr = resolveProperties(sc2, upr); | |
| 183 upr = upr.implicitCastTo(sc2, Type.tsize_t); | |
| 184 } | |
| 185 | |
| 186 if (sc2 != sc) | |
| 187 sc2.pop(); | |
| 188 } | |
| 189 | |
| 190 if (t.ty == Ttuple) | |
| 191 { | |
| 192 lwr = lwr.optimize(WANTvalue); | |
| 193 upr = upr.optimize(WANTvalue); | |
| 194 ulong i1 = lwr.toUInteger(); | |
| 195 ulong i2 = upr.toUInteger(); | |
| 196 | |
| 197 size_t length; | |
| 198 TupleExp te; | |
| 199 TypeTuple tup; | |
| 200 | |
| 201 if (e1.op == TOKtuple) // slicing an expression tuple | |
| 178 | 202 { |
| 0 | 203 te = cast(TupleExp)e1; |
| 204 length = te.exps.dim; | |
| 205 } | |
| 206 else if (e1.op == TOKtype) // slicing a type tuple | |
| 178 | 207 { |
| 0 | 208 tup = cast(TypeTuple)t; |
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209 length = Parameter.dim(tup.arguments); |
| 0 | 210 } |
| 211 else | |
| 212 assert(0); | |
| 213 | |
| 214 if (i1 <= i2 && i2 <= length) | |
| 178 | 215 { |
| 0 | 216 size_t j1 = cast(size_t) i1; |
| 217 size_t j2 = cast(size_t) i2; | |
| 218 | |
| 219 if (e1.op == TOKtuple) | |
| 178 | 220 { |
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221 auto exps = new Expressions; |
| 0 | 222 exps.setDim(j2 - j1); |
| 223 for (size_t i = 0; i < j2 - j1; i++) | |
| 178 | 224 { |
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225 auto e2 = te.exps[j1 + i]; |
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226 exps[i] = e2; |
| 0 | 227 } |
| 228 e = new TupleExp(loc, exps); | |
| 229 } | |
| 230 else | |
| 178 | 231 { |
|
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232 auto args = new Parameters; |
| 0 | 233 args.reserve(j2 - j1); |
| 234 for (size_t i = j1; i < j2; i++) | |
| 178 | 235 { |
|
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236 auto arg = Parameter.getNth(tup.arguments, i); |
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237 args.push(arg); |
| 0 | 238 } |
| 239 e = new TypeExp(e1.loc, new TypeTuple(args)); | |
| 240 } | |
| 241 e = e.semantic(sc); | |
| 242 } | |
| 243 else | |
| 244 { | |
| 245 error("string slice [%ju .. %ju] is out of bounds", i1, i2); | |
| 246 e = new ErrorExp(); | |
| 247 } | |
| 248 return e; | |
| 249 } | |
| 250 | |
| 251 if (t.ty == Tarray) | |
| 252 { | |
| 253 type = e1.type; | |
| 254 } | |
| 255 else | |
| 256 type = t.nextOf().arrayOf(); | |
| 257 return e; | |
| 258 | |
| 259 Lerror: | |
| 260 string s; | |
| 261 if (t.ty == Tvoid) | |
| 262 s = e1.toChars(); | |
| 263 else | |
| 264 s = t.toChars(); | |
| 265 error("%s cannot be sliced with []", s); | |
| 266 e = new ErrorExp(); | |
| 267 return e; | |
| 268 } | |
| 269 | |
| 72 | 270 override void checkEscape() |
| 0 | 271 { |
| 272 e1.checkEscape(); | |
| 273 } | |
| 178 | 274 |
| 135 | 275 override void checkEscapeRef() |
| 276 { | |
| 277 e1.checkEscapeRef(); | |
| 278 } | |
| 0 | 279 |
| 280 version (DMDV2) { | |
|
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281 override bool isLvalue() |
| 0 | 282 { |
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283 return true; |
| 0 | 284 } |
| 285 } | |
| 72 | 286 override Expression toLvalue(Scope sc, Expression e) |
| 0 | 287 { |
| 288 return this; | |
| 289 } | |
| 290 | |
| 72 | 291 override Expression modifiableLvalue(Scope sc, Expression e) |
| 0 | 292 { |
| 293 error("slice expression %s is not a modifiable lvalue", toChars()); | |
| 294 return this; | |
| 295 } | |
| 296 | |
| 72 | 297 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 298 { |
| 299 expToCBuffer(buf, hgs, e1, precedence[op]); | |
| 300 buf.writeByte('['); | |
| 301 if (upr || lwr) | |
| 302 { | |
| 303 if (lwr) | |
| 304 expToCBuffer(buf, hgs, lwr, PREC.PREC_assign); | |
| 305 else | |
| 306 buf.writeByte('0'); | |
| 307 buf.writestring(".."); | |
| 308 if (upr) | |
| 309 expToCBuffer(buf, hgs, upr, PREC.PREC_assign); | |
| 310 else | |
| 311 buf.writestring("length"); // BUG: should be array.length | |
| 312 } | |
| 313 buf.writeByte(']'); | |
| 314 } | |
| 315 | |
| 72 | 316 override Expression optimize(int result) |
| 0 | 317 { |
| 318 Expression e; | |
| 319 | |
| 320 //printf("SliceExp::optimize(result = %d) %s\n", result, toChars()); | |
| 321 e = this; | |
| 322 e1 = e1.optimize(WANTvalue | (result & WANTinterpret)); | |
| 323 if (!lwr) | |
| 178 | 324 { |
| 0 | 325 if (e1.op == TOKstring) |
| 178 | 326 { |
| 0 | 327 // Convert slice of string literal into dynamic array |
| 328 Type t = e1.type.toBasetype(); | |
| 329 if (t.nextOf()) | |
| 330 e = e1.castTo(null, t.nextOf().arrayOf()); | |
| 331 } | |
| 332 return e; | |
| 333 } | |
| 334 e1 = fromConstInitializer(result, e1); | |
| 335 lwr = lwr.optimize(WANTvalue | (result & WANTinterpret)); | |
| 336 upr = upr.optimize(WANTvalue | (result & WANTinterpret)); | |
| 337 e = Slice(type, e1, lwr, upr); | |
| 338 if (e is EXP_CANT_INTERPRET) | |
| 339 e = this; | |
| 340 //printf("-SliceExp::optimize() %s\n", e->toChars()); | |
| 341 return e; | |
| 342 } | |
| 343 | |
| 72 | 344 override Expression interpret(InterState istate) |
| 0 | 345 { |
| 72 | 346 Expression e; |
| 347 Expression e1; | |
| 348 Expression lwr; | |
| 349 Expression upr; | |
| 350 | |
| 351 version (LOG) { | |
| 352 printf("SliceExp.interpret() %s\n", toChars()); | |
| 353 } | |
| 354 e1 = this.e1.interpret(istate); | |
| 355 if (e1 is EXP_CANT_INTERPRET) | |
| 356 goto Lcant; | |
| 357 if (!this.lwr) | |
| 358 { | |
| 359 e = e1.castTo(null, type); | |
| 360 return e.interpret(istate); | |
| 361 } | |
| 362 | |
| 363 /* Set the $ variable | |
| 364 */ | |
| 365 e = ArrayLength(Type.tsize_t, e1); | |
| 366 if (e is EXP_CANT_INTERPRET) | |
| 367 goto Lcant; | |
| 368 if (lengthVar) | |
| 369 lengthVar.value = e; | |
| 370 | |
| 371 /* Evaluate lower and upper bounds of slice | |
| 372 */ | |
| 373 lwr = this.lwr.interpret(istate); | |
| 374 if (lwr is EXP_CANT_INTERPRET) | |
| 375 goto Lcant; | |
| 376 upr = this.upr.interpret(istate); | |
| 377 if (upr is EXP_CANT_INTERPRET) | |
| 378 goto Lcant; | |
| 379 | |
| 380 return Slice(type, e1, lwr, upr); | |
| 381 | |
| 382 Lcant: | |
| 63 | 383 return EXP_CANT_INTERPRET; |
| 0 | 384 } |
| 385 | |
| 72 | 386 override void dump(int indent) |
| 0 | 387 { |
| 388 assert(false); | |
| 389 } | |
| 390 | |
| 72 | 391 override elem* toElem(IRState* irs) |
| 0 | 392 { |
| 393 //printf("SliceExp.toElem()\n"); | |
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394 auto t1 = e1.type.toBasetype(); |
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395 auto e = e1.toElem(irs); |
| 0 | 396 if (lwr) |
| 397 { | |
|
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398 auto einit = resolveLengthVar(lengthVar, &e, t1); |
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399 |
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400 int sz = cast(uint)t1.nextOf().size(); |
| 0 | 401 |
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402 auto elwr = lwr.toElem(irs); |
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403 auto eupr = upr.toElem(irs); |
| 0 | 404 |
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405 auto elwr2 = el_same(&elwr); |
| 0 | 406 |
| 407 // Create an array reference where: | |
| 408 // length is (upr - lwr) | |
| 409 // pointer is (ptr + lwr*sz) | |
| 410 // Combine as (length pair ptr) | |
| 411 | |
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412 if (irs.arrayBoundsCheck()) |
| 0 | 413 { |
| 414 // Checks (unsigned compares): | |
| 415 // upr <= array.length | |
| 416 // lwr <= upr | |
| 417 | |
| 418 elem *c1; | |
| 419 elem *c2; | |
| 420 elem *ea; | |
| 421 elem *eb; | |
| 422 elem *eupr2; | |
| 423 elem *elength; | |
| 424 | |
| 425 if (t1.ty == Tpointer) | |
| 426 { | |
| 427 // Just do lwr <= upr check | |
| 428 | |
| 429 eupr2 = el_same(&eupr); | |
| 430 eupr2.Ety = TYuint; // make sure unsigned comparison | |
| 431 c1 = el_bin(OPle, TYint, elwr2, eupr2); | |
| 432 c1 = el_combine(eupr, c1); | |
| 433 goto L2; | |
| 434 } | |
| 435 else if (t1.ty == Tsarray) | |
| 178 | 436 { |
| 0 | 437 TypeSArray tsa = cast(TypeSArray)t1; |
| 438 ulong length = tsa.dim.toInteger(); | |
| 439 | |
| 440 elength = el_long(TYuint, length); | |
| 441 goto L1; | |
| 442 } | |
| 443 else if (t1.ty == Tarray) | |
| 444 { | |
| 445 if (lengthVar) | |
| 446 elength = el_var(lengthVar.toSymbol()); | |
| 447 else | |
| 448 { | |
| 449 elength = e; | |
| 450 e = el_same(&elength); | |
| 451 elength = el_una(OP64_32, TYuint, elength); | |
| 452 } | |
| 453 L1: | |
| 454 eupr2 = el_same(&eupr); | |
| 455 c1 = el_bin(OPle, TYint, eupr, elength); | |
| 456 eupr2.Ety = TYuint; // make sure unsigned comparison | |
| 457 c2 = el_bin(OPle, TYint, elwr2, eupr2); | |
| 458 c1 = el_bin(OPandand, TYint, c1, c2); // (c1 && c2) | |
| 459 | |
| 460 L2: | |
| 461 // Construct: (c1 || ModuleArray(line)) | |
| 462 Symbol* sassert; | |
| 463 | |
| 464 sassert = irs.blx.module_.toModuleArray(); | |
| 465 ea = el_bin(OPcall,TYvoid,el_var(sassert), el_long(TYint, loc.linnum)); | |
| 466 eb = el_bin(OPoror,TYvoid,c1,ea); | |
| 467 elwr = el_combine(elwr, eb); | |
| 468 | |
| 469 elwr2 = el_copytree(elwr2); | |
| 470 eupr = el_copytree(eupr2); | |
| 471 } | |
| 472 } | |
| 473 | |
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474 auto eptr = array_toPtr(e1.type, e); |
| 0 | 475 |
| 476 elem *elength = el_bin(OPmin, TYint, eupr, elwr2); | |
| 477 eptr = el_bin(OPadd, TYnptr, eptr, el_bin(OPmul, TYint, el_copytree(elwr2), el_long(TYint, sz))); | |
| 478 | |
| 479 e = el_pair(TYullong, elength, eptr); | |
| 480 e = el_combine(elwr, e); | |
| 481 e = el_combine(einit, e); | |
| 482 } | |
| 483 else if (t1.ty == Tsarray) | |
| 484 { | |
| 485 e = sarray_toDarray(loc, t1, null, e); | |
| 486 } | |
| 487 | |
| 488 el_setLoc(e,loc); | |
| 489 return e; | |
| 490 } | |
| 491 | |
| 72 | 492 override void scanForNestedRef(Scope sc) |
| 0 | 493 { |
| 72 | 494 e1.scanForNestedRef(sc); |
| 495 | |
| 496 if (lengthVar) | |
| 178 | 497 { |
| 72 | 498 //printf("lengthVar\n"); |
| 499 lengthVar.parent = sc.parent; | |
| 500 } | |
| 501 if (lwr) | |
| 502 lwr.scanForNestedRef(sc); | |
| 503 if (upr) | |
| 64 | 504 upr.scanForNestedRef(sc); |
| 0 | 505 } |
| 506 | |
| 72 | 507 override void buildArrayIdent(OutBuffer buf, Expressions arguments) |
| 0 | 508 { |
| 72 | 509 buf.writestring("Slice"); |
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510 arguments.shift(this); |
| 0 | 511 } |
| 512 | |
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513 override Expression buildArrayLoop(Parameters fparams) |
| 0 | 514 { |
| 72 | 515 Identifier id = Identifier.generateId("p", fparams.dim); |
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516 auto param = new Parameter(STCconst, type, id, null); |
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517 fparams.shift(param); |
| 72 | 518 Expression e = new IdentifierExp(Loc(0), id); |
| 519 Expressions arguments = new Expressions(); | |
| 520 Expression index = new IdentifierExp(Loc(0), Id.p); | |
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521 arguments.push(index); |
| 72 | 522 e = new ArrayExp(Loc(0), e, arguments); |
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523 return e; |
| 0 | 524 } |
| 525 | |
| 72 | 526 override int inlineCost(InlineCostState* ics) |
| 0 | 527 { |
| 528 int cost = 1 + e1.inlineCost(ics); | |
| 529 if (lwr) | |
| 530 cost += lwr.inlineCost(ics); | |
| 531 if (upr) | |
| 532 cost += upr.inlineCost(ics); | |
| 533 return cost; | |
| 534 } | |
| 535 | |
| 72 | 536 override Expression doInline(InlineDoState ids) |
| 0 | 537 { |
| 538 SliceExp are = cast(SliceExp)copy(); | |
| 539 | |
| 540 are.e1 = e1.doInline(ids); | |
| 541 | |
| 542 if (lengthVar) | |
| 178 | 543 { |
| 0 | 544 //printf("lengthVar\n"); |
| 545 VarDeclaration vd = lengthVar; | |
| 546 ExpInitializer ie; | |
| 547 ExpInitializer ieto; | |
| 548 VarDeclaration vto; | |
| 549 | |
| 178 | 550 vto = cloneThis(vd); |
| 551 | |
| 0 | 552 vto.parent = ids.parent; |
| 553 vto.csym = null; | |
| 554 vto.isym = null; | |
| 555 | |
| 556 ids.from.push(cast(void*)vd); | |
| 557 ids.to.push(cast(void*)vto); | |
| 558 | |
| 559 if (vd.init) | |
| 560 { | |
| 561 ie = vd.init.isExpInitializer(); | |
| 562 assert(ie); | |
| 563 ieto = new ExpInitializer(ie.loc, ie.exp.doInline(ids)); | |
| 564 vto.init = ieto; | |
| 565 } | |
| 566 | |
| 567 are.lengthVar = vto; | |
| 568 } | |
| 569 | |
| 570 if (lwr) | |
| 571 are.lwr = lwr.doInline(ids); | |
| 572 if (upr) | |
| 573 are.upr = upr.doInline(ids); | |
| 574 return are; | |
| 575 } | |
| 576 | |
| 72 | 577 override Expression inlineScan(InlineScanState* iss) |
| 0 | 578 { |
| 579 e1 = e1.inlineScan(iss); | |
| 580 if (lwr) | |
| 581 lwr = lwr.inlineScan(iss); | |
| 582 if (upr) | |
| 583 upr = upr.inlineScan(iss); | |
| 584 return this; | |
| 585 } | |
| 586 } | |
| 587 |