Mercurial > projects > ldc
annotate dmd/optimize.c @ 129:8096ba7082db trunk
[svn r133] Fixed some problems with inlining not happening :P
Fixed problems with certain cases of deeply nested classes/functions.
author | lindquist |
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date | Fri, 28 Dec 2007 22:55:24 +0100 |
parents | 61615fa85940 |
children | 2b72433d5c8c |
rev | line source |
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1 | 1 |
2 // Compiler implementation of the D programming language | |
3 // Copyright (c) 1999-2007 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 <ctype.h> | |
13 #include <assert.h> | |
14 #include <math.h> | |
15 | |
16 #if __DMC__ | |
17 #include <complex.h> | |
18 #endif | |
19 | |
20 #include "lexer.h" | |
21 #include "mtype.h" | |
22 #include "expression.h" | |
23 #include "declaration.h" | |
24 #include "aggregate.h" | |
25 #include "init.h" | |
26 | |
27 | |
28 #ifdef IN_GCC | |
29 #include "d-gcc-real.h" | |
30 | |
31 /* %% fix? */ | |
32 extern "C" bool real_isnan (const real_t *); | |
33 #endif | |
34 | |
35 static real_t zero; // work around DMC bug for now | |
36 | |
37 | |
38 /************************************* | |
39 * If expression is a variable with a const initializer, | |
40 * return that initializer. | |
41 */ | |
42 | |
43 Expression *fromConstInitializer(Expression *e1) | |
44 { | |
45 //printf("fromConstInitializer(%s)\n", e1->toChars()); | |
46 if (e1->op == TOKvar) | |
47 { VarExp *ve = (VarExp *)e1; | |
48 VarDeclaration *v = ve->var->isVarDeclaration(); | |
49 if (v && v->isConst() && v->init) | |
50 { Expression *ei = v->init->toExpression(); | |
51 if (ei && ei->type) | |
52 e1 = ei; | |
53 } | |
54 } | |
55 return e1; | |
56 } | |
57 | |
58 | |
59 Expression *Expression::optimize(int result) | |
60 { | |
61 //printf("Expression::optimize(result = x%x) %s\n", result, toChars()); | |
62 return this; | |
63 } | |
64 | |
65 Expression *VarExp::optimize(int result) | |
66 { | |
67 if (result & WANTinterpret) | |
68 { | |
69 return fromConstInitializer(this); | |
70 } | |
71 return this; | |
72 } | |
73 | |
74 Expression *TupleExp::optimize(int result) | |
75 { | |
76 for (size_t i = 0; i < exps->dim; i++) | |
77 { Expression *e = (Expression *)exps->data[i]; | |
78 | |
79 e = e->optimize(WANTvalue | (result & WANTinterpret)); | |
80 exps->data[i] = (void *)e; | |
81 } | |
82 return this; | |
83 } | |
84 | |
85 Expression *ArrayLiteralExp::optimize(int result) | |
86 { | |
87 if (elements) | |
88 { | |
89 for (size_t i = 0; i < elements->dim; i++) | |
90 { Expression *e = (Expression *)elements->data[i]; | |
91 | |
92 e = e->optimize(WANTvalue | (result & WANTinterpret)); | |
93 elements->data[i] = (void *)e; | |
94 } | |
95 } | |
96 return this; | |
97 } | |
98 | |
99 Expression *AssocArrayLiteralExp::optimize(int result) | |
100 { | |
101 assert(keys->dim == values->dim); | |
102 for (size_t i = 0; i < keys->dim; i++) | |
103 { Expression *e = (Expression *)keys->data[i]; | |
104 | |
105 e = e->optimize(WANTvalue | (result & WANTinterpret)); | |
106 keys->data[i] = (void *)e; | |
107 | |
108 e = (Expression *)values->data[i]; | |
109 e = e->optimize(WANTvalue | (result & WANTinterpret)); | |
110 values->data[i] = (void *)e; | |
111 } | |
112 return this; | |
113 } | |
114 | |
115 Expression *StructLiteralExp::optimize(int result) | |
116 { | |
117 if (elements) | |
118 { | |
119 for (size_t i = 0; i < elements->dim; i++) | |
120 { Expression *e = (Expression *)elements->data[i]; | |
121 if (!e) | |
122 continue; | |
123 e = e->optimize(WANTvalue | (result & WANTinterpret)); | |
124 elements->data[i] = (void *)e; | |
125 } | |
126 } | |
127 return this; | |
128 } | |
129 | |
130 Expression *TypeExp::optimize(int result) | |
131 { | |
132 return this; | |
133 } | |
134 | |
135 Expression *UnaExp::optimize(int result) | |
136 { | |
137 e1 = e1->optimize(result); | |
138 return this; | |
139 } | |
140 | |
141 Expression *NegExp::optimize(int result) | |
142 { Expression *e; | |
143 | |
144 e1 = e1->optimize(result); | |
145 if (e1->isConst() == 1) | |
146 { | |
147 e = Neg(type, e1); | |
148 } | |
149 else | |
150 e = this; | |
151 return e; | |
152 } | |
153 | |
154 Expression *ComExp::optimize(int result) | |
155 { Expression *e; | |
156 | |
157 e1 = e1->optimize(result); | |
158 if (e1->isConst() == 1) | |
159 { | |
160 e = Com(type, e1); | |
161 } | |
162 else | |
163 e = this; | |
164 return e; | |
165 } | |
166 | |
167 Expression *NotExp::optimize(int result) | |
168 { Expression *e; | |
169 | |
170 e1 = e1->optimize(result); | |
171 if (e1->isConst() == 1) | |
172 { | |
173 e = Not(type, e1); | |
174 } | |
175 else | |
176 e = this; | |
177 return e; | |
178 } | |
179 | |
180 Expression *BoolExp::optimize(int result) | |
181 { Expression *e; | |
182 | |
183 e1 = e1->optimize(result); | |
184 if (e1->isConst() == 1) | |
185 { | |
186 e = Bool(type, e1); | |
187 } | |
188 else | |
189 e = this; | |
190 return e; | |
191 } | |
192 | |
193 Expression *AddrExp::optimize(int result) | |
194 { Expression *e; | |
195 | |
196 //printf("AddrExp::optimize(result = %d) %s\n", result, toChars()); | |
197 e1 = e1->optimize(result); | |
198 // Convert &*ex to ex | |
199 if (e1->op == TOKstar) | |
200 { Expression *ex; | |
201 | |
202 ex = ((PtrExp *)e1)->e1; | |
203 if (type->equals(ex->type)) | |
204 e = ex; | |
205 else | |
206 { | |
207 e = ex->copy(); | |
208 e->type = type; | |
209 } | |
210 return e; | |
211 } | |
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212 #if !IN_LLVM |
1 | 213 if (e1->op == TOKvar) |
214 { VarExp *ve = (VarExp *)e1; | |
215 if (!ve->var->isOut() && !ve->var->isRef() && | |
216 !ve->var->isImportedSymbol()) | |
217 { | |
218 e = new SymOffExp(loc, ve->var, 0); | |
219 e->type = type; | |
220 return e; | |
221 } | |
222 } | |
223 if (e1->op == TOKindex) | |
224 { // Convert &array[n] to &array+n | |
225 IndexExp *ae = (IndexExp *)e1; | |
226 | |
227 if (ae->e2->op == TOKint64 && ae->e1->op == TOKvar) | |
228 { | |
229 integer_t index = ae->e2->toInteger(); | |
230 VarExp *ve = (VarExp *)ae->e1; | |
231 if (ve->type->ty == Tsarray && ve->type->next->ty != Tbit | |
232 && !ve->var->isImportedSymbol()) | |
233 { | |
234 TypeSArray *ts = (TypeSArray *)ve->type; | |
235 integer_t dim = ts->dim->toInteger(); | |
236 if (index < 0 || index >= dim) | |
237 error("array index %jd is out of bounds [0..%jd]", index, dim); | |
238 e = new SymOffExp(loc, ve->var, index * ts->next->size()); | |
239 e->type = type; | |
240 return e; | |
241 } | |
242 } | |
243 } | |
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244 #endif |
1 | 245 return this; |
246 } | |
247 | |
248 Expression *PtrExp::optimize(int result) | |
249 { | |
250 //printf("PtrExp::optimize(result = x%x) %s\n", result, toChars()); | |
251 e1 = e1->optimize(result); | |
252 // Convert *&ex to ex | |
253 if (e1->op == TOKaddress) | |
254 { Expression *e; | |
255 Expression *ex; | |
256 | |
257 ex = ((AddrExp *)e1)->e1; | |
258 if (type->equals(ex->type)) | |
259 e = ex; | |
260 else | |
261 { | |
262 e = ex->copy(); | |
263 e->type = type; | |
264 } | |
265 return e; | |
266 } | |
267 // Constant fold *(&structliteral + offset) | |
268 if (e1->op == TOKadd) | |
269 { | |
270 Expression *e; | |
271 e = Ptr(type, e1); | |
272 if (e != EXP_CANT_INTERPRET) | |
273 return e; | |
274 } | |
275 | |
276 return this; | |
277 } | |
278 | |
279 Expression *CallExp::optimize(int result) | |
280 { Expression *e = this; | |
281 | |
282 e1 = e1->optimize(result); | |
283 if (e1->op == TOKvar && result & WANTinterpret) | |
284 { | |
285 FuncDeclaration *fd = ((VarExp *)e1)->var->isFuncDeclaration(); | |
286 if (fd) | |
287 { | |
288 Expression *eresult = fd->interpret(NULL, arguments); | |
92 | 289 if (eresult && eresult != EXP_VOID_INTERPRET) |
1 | 290 e = eresult; |
291 else if (result & WANTinterpret) | |
292 error("cannot evaluate %s at compile time", toChars()); | |
293 } | |
294 } | |
295 return e; | |
296 } | |
297 | |
298 | |
299 Expression *CastExp::optimize(int result) | |
300 { | |
301 //printf("CastExp::optimize(result = %d) %s\n", result, toChars()); | |
302 //printf("from %s to %s\n", type->toChars(), to->toChars()); | |
303 //printf("from %s\n", type->toChars()); | |
304 //printf("type = %p\n", type); | |
305 assert(type); | |
306 enum TOK op1 = e1->op; | |
307 | |
308 e1 = e1->optimize(result); | |
309 if (result & WANTinterpret) | |
310 e1 = fromConstInitializer(e1); | |
311 | |
312 if ((e1->op == TOKstring || e1->op == TOKarrayliteral) && | |
313 (type->ty == Tpointer || type->ty == Tarray) && | |
314 type->next->equals(e1->type->next) | |
315 ) | |
316 { | |
317 e1->type = type; | |
318 return e1; | |
319 } | |
320 /* The first test here is to prevent infinite loops | |
321 */ | |
322 if (op1 != TOKarrayliteral && e1->op == TOKarrayliteral) | |
323 return e1->castTo(NULL, to); | |
324 if (e1->op == TOKnull && | |
325 (type->ty == Tpointer || type->ty == Tclass)) | |
326 { | |
327 e1->type = type; | |
328 return e1; | |
329 } | |
330 | |
331 if (result & WANTflags && type->ty == Tclass && e1->type->ty == Tclass) | |
332 { | |
333 // See if we can remove an unnecessary cast | |
334 ClassDeclaration *cdfrom; | |
335 ClassDeclaration *cdto; | |
336 int offset; | |
337 | |
338 cdfrom = e1->type->isClassHandle(); | |
339 cdto = type->isClassHandle(); | |
340 if (cdto->isBaseOf(cdfrom, &offset) && offset == 0) | |
341 { | |
342 e1->type = type; | |
343 return e1; | |
344 } | |
345 } | |
346 | |
347 Expression *e; | |
348 | |
349 if (e1->isConst()) | |
350 { | |
351 if (e1->op == TOKsymoff) | |
352 { | |
353 if (type->size() == e1->type->size() && | |
354 type->toBasetype()->ty != Tsarray) | |
355 { | |
356 e1->type = type; | |
357 return e1; | |
358 } | |
359 return this; | |
360 } | |
361 if (to->toBasetype()->ty == Tvoid) | |
362 e = this; | |
363 else | |
364 e = Cast(type, to, e1); | |
365 } | |
366 else | |
367 e = this; | |
368 return e; | |
369 } | |
370 | |
371 Expression *BinExp::optimize(int result) | |
372 { | |
373 //printf("BinExp::optimize(result = %d) %s\n", result, toChars()); | |
374 e1 = e1->optimize(result); | |
375 e2 = e2->optimize(result); | |
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376 if (op == TOKshlass || op == TOKshrass || op == TOKushrass) |
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377 { |
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378 if (e2->isConst() == 1) |
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379 { |
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380 integer_t i2 = e2->toInteger(); |
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381 d_uns64 sz = e1->type->size() * 8; |
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382 if (i2 < 0 || i2 > sz) |
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383 { error("shift assign by %jd is outside the range 0..%zu", i2, sz); |
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384 e2 = new IntegerExp(0); |
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385 } |
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386 } |
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387 } |
1 | 388 return this; |
389 } | |
390 | |
391 Expression *AddExp::optimize(int result) | |
392 { Expression *e; | |
393 | |
394 //printf("AddExp::optimize(%s)\n", toChars()); | |
395 e1 = e1->optimize(result); | |
396 e2 = e2->optimize(result); | |
397 if (e1->isConst() && e2->isConst()) | |
398 { | |
399 if (e1->op == TOKsymoff && e2->op == TOKsymoff) | |
400 return this; | |
401 e = Add(type, e1, e2); | |
402 } | |
403 else | |
404 e = this; | |
405 return e; | |
406 } | |
407 | |
408 Expression *MinExp::optimize(int result) | |
409 { Expression *e; | |
410 | |
411 e1 = e1->optimize(result); | |
412 e2 = e2->optimize(result); | |
413 if (e1->isConst() && e2->isConst()) | |
414 { | |
415 if (e2->op == TOKsymoff) | |
416 return this; | |
417 e = Min(type, e1, e2); | |
418 } | |
419 else | |
420 e = this; | |
421 return e; | |
422 } | |
423 | |
424 Expression *MulExp::optimize(int result) | |
425 { Expression *e; | |
426 | |
427 //printf("MulExp::optimize(result = %d) %s\n", result, toChars()); | |
428 e1 = e1->optimize(result); | |
429 e2 = e2->optimize(result); | |
430 if (e1->isConst() == 1 && e2->isConst() == 1) | |
431 { | |
432 e = Mul(type, e1, e2); | |
433 } | |
434 else | |
435 e = this; | |
436 return e; | |
437 } | |
438 | |
439 Expression *DivExp::optimize(int result) | |
440 { Expression *e; | |
441 | |
442 //printf("DivExp::optimize(%s)\n", toChars()); | |
443 e1 = e1->optimize(result); | |
444 e2 = e2->optimize(result); | |
445 if (e1->isConst() == 1 && e2->isConst() == 1) | |
446 { | |
447 e = Div(type, e1, e2); | |
448 } | |
449 else | |
450 e = this; | |
451 return e; | |
452 } | |
453 | |
454 Expression *ModExp::optimize(int result) | |
455 { Expression *e; | |
456 | |
457 e1 = e1->optimize(result); | |
458 e2 = e2->optimize(result); | |
459 if (e1->isConst() == 1 && e2->isConst() == 1) | |
460 { | |
461 e = Mod(type, e1, e2); | |
462 } | |
463 else | |
464 e = this; | |
465 return e; | |
466 } | |
467 | |
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468 Expression *shift_optimize(int result, BinExp *e, Expression *(*shift)(Type *, Expression *, Expression *)) |
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469 { Expression *ex = e; |
1 | 470 |
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471 e->e1 = e->e1->optimize(result); |
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472 e->e2 = e->e2->optimize(result); |
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473 if (e->e2->isConst() == 1) |
1 | 474 { |
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475 integer_t i2 = e->e2->toInteger(); |
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476 d_uns64 sz = e->e1->type->size() * 8; |
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477 if (i2 < 0 || i2 > sz) |
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478 { error("shift by %jd is outside the range 0..%zu", i2, sz); |
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479 e->e2 = new IntegerExp(0); |
1 | 480 } |
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481 if (e->e1->isConst() == 1) |
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482 ex = (*shift)(e->type, e->e1, e->e2); |
1 | 483 } |
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484 return ex; |
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485 } |
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486 |
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487 Expression *ShlExp::optimize(int result) |
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488 { |
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489 //printf("ShlExp::optimize(result = %d) %s\n", result, toChars()); |
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490 return shift_optimize(result, this, Shl); |
1 | 491 } |
492 | |
493 Expression *ShrExp::optimize(int result) | |
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494 { |
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495 //printf("ShrExp::optimize(result = %d) %s\n", result, toChars()); |
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496 return shift_optimize(result, this, Shr); |
1 | 497 } |
498 | |
499 Expression *UshrExp::optimize(int result) | |
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500 { |
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501 //printf("UshrExp::optimize(result = %d) %s\n", result, toChars()); |
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502 return shift_optimize(result, this, Ushr); |
1 | 503 } |
504 | |
505 Expression *AndExp::optimize(int result) | |
506 { Expression *e; | |
507 | |
508 e1 = e1->optimize(result); | |
509 e2 = e2->optimize(result); | |
510 if (e1->isConst() == 1 && e2->isConst() == 1) | |
511 e = And(type, e1, e2); | |
512 else | |
513 e = this; | |
514 return e; | |
515 } | |
516 | |
517 Expression *OrExp::optimize(int result) | |
518 { Expression *e; | |
519 | |
520 e1 = e1->optimize(result); | |
521 e2 = e2->optimize(result); | |
522 if (e1->isConst() == 1 && e2->isConst() == 1) | |
523 e = Or(type, e1, e2); | |
524 else | |
525 e = this; | |
526 return e; | |
527 } | |
528 | |
529 Expression *XorExp::optimize(int result) | |
530 { Expression *e; | |
531 | |
532 e1 = e1->optimize(result); | |
533 e2 = e2->optimize(result); | |
534 if (e1->isConst() == 1 && e2->isConst() == 1) | |
535 e = Xor(type, e1, e2); | |
536 else | |
537 e = this; | |
538 return e; | |
539 } | |
540 | |
541 Expression *CommaExp::optimize(int result) | |
542 { Expression *e; | |
543 | |
544 //printf("CommaExp::optimize(result = %d) %s\n", result, toChars()); | |
545 e1 = e1->optimize(result & WANTinterpret); | |
546 e2 = e2->optimize(result); | |
547 if (!e1 || e1->op == TOKint64 || e1->op == TOKfloat64 || !e1->checkSideEffect(2)) | |
548 { | |
549 e = e2; | |
550 if (e) | |
551 e->type = type; | |
552 } | |
553 else | |
554 e = this; | |
555 //printf("-CommaExp::optimize(result = %d) %s\n", result, e->toChars()); | |
556 return e; | |
557 } | |
558 | |
559 Expression *ArrayLengthExp::optimize(int result) | |
560 { Expression *e; | |
561 | |
562 //printf("ArrayLengthExp::optimize(result = %d) %s\n", result, toChars()); | |
563 e1 = e1->optimize(WANTvalue | (result & WANTinterpret)); | |
564 e = this; | |
565 if (e1->op == TOKstring || e1->op == TOKarrayliteral || e1->op == TOKassocarrayliteral) | |
566 { | |
567 e = ArrayLength(type, e1); | |
568 } | |
569 return e; | |
570 } | |
571 | |
572 Expression *EqualExp::optimize(int result) | |
573 { Expression *e; | |
574 | |
575 //printf("EqualExp::optimize(result = %x) %s\n", result, toChars()); | |
576 e1 = e1->optimize(WANTvalue | (result & WANTinterpret)); | |
577 e2 = e2->optimize(WANTvalue | (result & WANTinterpret)); | |
578 e = this; | |
579 | |
580 Expression *e1 = fromConstInitializer(this->e1); | |
581 Expression *e2 = fromConstInitializer(this->e2); | |
582 | |
583 e = Equal(op, type, e1, e2); | |
584 if (e == EXP_CANT_INTERPRET) | |
585 e = this; | |
586 return e; | |
587 } | |
588 | |
589 Expression *IdentityExp::optimize(int result) | |
590 { Expression *e; | |
591 | |
592 //printf("IdentityExp::optimize(result = %d) %s\n", result, toChars()); | |
593 e1 = e1->optimize(WANTvalue | (result & WANTinterpret)); | |
594 e2 = e2->optimize(WANTvalue | (result & WANTinterpret)); | |
595 e = this; | |
596 | |
597 if (this->e1->isConst() && this->e2->isConst()) | |
598 { | |
599 e = Identity(op, type, this->e1, this->e2); | |
600 } | |
601 return e; | |
602 } | |
603 | |
604 Expression *IndexExp::optimize(int result) | |
605 { Expression *e; | |
606 | |
607 //printf("IndexExp::optimize(result = %d) %s\n", result, toChars()); | |
608 Expression *e1 = this->e1->optimize(WANTvalue | (result & WANTinterpret)); | |
609 if (result & WANTinterpret) | |
610 e1 = fromConstInitializer(e1); | |
611 e2 = e2->optimize(WANTvalue | (result & WANTinterpret)); | |
612 e = Index(type, e1, e2); | |
613 if (e == EXP_CANT_INTERPRET) | |
614 e = this; | |
615 return e; | |
616 } | |
617 | |
618 Expression *SliceExp::optimize(int result) | |
619 { Expression *e; | |
620 | |
621 //printf("SliceExp::optimize(result = %d) %s\n", result, toChars()); | |
622 e = this; | |
623 e1 = e1->optimize(WANTvalue | (result & WANTinterpret)); | |
624 if (!lwr) | |
625 { if (e1->op == TOKstring) | |
626 { // Convert slice of string literal into dynamic array | |
627 Type *t = e1->type->toBasetype(); | |
628 if (t->next) | |
629 e = e1->castTo(NULL, t->next->arrayOf()); | |
630 } | |
631 return e; | |
632 } | |
633 if (result & WANTinterpret) | |
634 e1 = fromConstInitializer(e1); | |
635 lwr = lwr->optimize(WANTvalue | (result & WANTinterpret)); | |
636 upr = upr->optimize(WANTvalue | (result & WANTinterpret)); | |
637 e = Slice(type, e1, lwr, upr); | |
638 if (e == EXP_CANT_INTERPRET) | |
639 e = this; | |
640 return e; | |
641 } | |
642 | |
643 Expression *AndAndExp::optimize(int result) | |
644 { Expression *e; | |
645 | |
646 //printf("AndAndExp::optimize(%d) %s\n", result, toChars()); | |
647 e1 = e1->optimize(WANTflags | (result & WANTinterpret)); | |
648 e = this; | |
649 if (e1->isBool(FALSE)) | |
650 { | |
651 e = new CommaExp(loc, e1, new IntegerExp(loc, 0, type)); | |
652 e->type = type; | |
653 e = e->optimize(result); | |
654 } | |
655 else | |
656 { | |
657 e2 = e2->optimize(WANTflags | (result & WANTinterpret)); | |
658 if (result && e2->type->toBasetype()->ty == Tvoid && !global.errors) | |
659 error("void has no value"); | |
660 if (e1->isConst()) | |
661 { | |
662 if (e2->isConst()) | |
663 { int n1 = e1->isBool(1); | |
664 int n2 = e2->isBool(1); | |
665 | |
666 e = new IntegerExp(loc, n1 && n2, type); | |
667 } | |
668 else if (e1->isBool(TRUE)) | |
669 e = new BoolExp(loc, e2, type); | |
670 } | |
671 } | |
672 return e; | |
673 } | |
674 | |
675 Expression *OrOrExp::optimize(int result) | |
676 { Expression *e; | |
677 | |
678 e1 = e1->optimize(WANTflags | (result & WANTinterpret)); | |
679 e = this; | |
680 if (e1->isBool(TRUE)) | |
681 { // Replace with (e1, 1) | |
682 e = new CommaExp(loc, e1, new IntegerExp(loc, 1, type)); | |
683 e->type = type; | |
684 e = e->optimize(result); | |
685 } | |
686 else | |
687 { | |
688 e2 = e2->optimize(WANTflags | (result & WANTinterpret)); | |
689 if (result && e2->type->toBasetype()->ty == Tvoid && !global.errors) | |
690 error("void has no value"); | |
691 if (e1->isConst()) | |
692 { | |
693 if (e2->isConst()) | |
694 { int n1 = e1->isBool(1); | |
695 int n2 = e2->isBool(1); | |
696 | |
697 e = new IntegerExp(loc, n1 || n2, type); | |
698 } | |
699 else if (e1->isBool(FALSE)) | |
700 e = new BoolExp(loc, e2, type); | |
701 } | |
702 } | |
703 return e; | |
704 } | |
705 | |
706 Expression *CmpExp::optimize(int result) | |
707 { Expression *e; | |
708 | |
709 //printf("CmpExp::optimize() %s\n", toChars()); | |
710 e1 = e1->optimize(result); | |
711 e2 = e2->optimize(result); | |
712 if (e1->isConst() == 1 && e2->isConst() == 1) | |
713 { | |
714 e = Cmp(op, type, this->e1, this->e2); | |
715 } | |
716 else | |
717 e = this; | |
718 return e; | |
719 } | |
720 | |
721 Expression *CatExp::optimize(int result) | |
722 { Expression *e; | |
723 | |
724 //printf("CatExp::optimize(%d) %s\n", result, toChars()); | |
725 e1 = e1->optimize(result); | |
726 e2 = e2->optimize(result); | |
727 e = Cat(type, e1, e2); | |
728 if (e == EXP_CANT_INTERPRET) | |
729 e = this; | |
730 return e; | |
731 } | |
732 | |
733 | |
734 Expression *CondExp::optimize(int result) | |
735 { Expression *e; | |
736 | |
737 econd = econd->optimize(WANTflags | (result & WANTinterpret)); | |
738 if (econd->isBool(TRUE)) | |
739 e = e1->optimize(result); | |
740 else if (econd->isBool(FALSE)) | |
741 e = e2->optimize(result); | |
742 else | |
743 { e1 = e1->optimize(result); | |
744 e2 = e2->optimize(result); | |
745 e = this; | |
746 } | |
747 return e; | |
748 } | |
749 | |
750 |