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isl_schedule.c: add_inter_constraints: avoid invalid access on error
[isl.git] / isl_pw_templ.c
blobf112fc02462eb33c98f19c783df78960c88e4575
1 #include <isl/aff.h>
2
3 #define xFN(TYPE,NAME) TYPE ## _ ## NAME
4 #define FN(TYPE,NAME) xFN(TYPE,NAME)
5 #define xS(TYPE,NAME) struct TYPE ## _ ## NAME
6 #define S(TYPE,NAME) xS(TYPE,NAME)
7
8 #ifdef HAS_TYPE
9 __isl_give PW *FN(PW,alloc_size)(__isl_take isl_space *dim,
10 enum isl_fold type, int n)
11 #else
12 __isl_give PW *FN(PW,alloc_size)(__isl_take isl_space *dim, int n)
13 #endif
14 {
15 isl_ctx *ctx;
16 struct PW *pw;
17
18 if (!dim)
19 return NULL;
20 ctx = isl_space_get_ctx(dim);
21 isl_assert(ctx, n >= 0, goto error);
22 pw = isl_alloc(ctx, struct PW,
23 sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
24 if (!pw)
25 goto error;
26
27 pw->ref = 1;
28 #ifdef HAS_TYPE
29 pw->type = type;
30 #endif
31 pw->size = n;
32 pw->n = 0;
33 pw->dim = dim;
34 return pw;
35 error:
36 isl_space_free(dim);
37 return NULL;
38 }
39
40 #ifdef HAS_TYPE
41 __isl_give PW *FN(PW,ZERO)(__isl_take isl_space *dim, enum isl_fold type)
42 {
43 return FN(PW,alloc_size)(dim, type, 0);
44 }
45 #else
46 __isl_give PW *FN(PW,ZERO)(__isl_take isl_space *dim)
47 {
48 return FN(PW,alloc_size)(dim, 0);
49 }
50 #endif
51
52 __isl_give PW *FN(PW,add_piece)(__isl_take PW *pw,
53 __isl_take isl_set *set, __isl_take EL *el)
54 {
55 isl_ctx *ctx;
56 isl_space *el_dim = NULL;
57
58 if (!pw || !set || !el)
59 goto error;
60
61 if (isl_set_plain_is_empty(set) || FN(EL,EL_IS_ZERO)(el)) {
62 isl_set_free(set);
63 FN(EL,free)(el);
64 return pw;
65 }
66
67 ctx = isl_set_get_ctx(set);
68 #ifdef HAS_TYPE
69 if (pw->type != el->type)
70 isl_die(ctx, isl_error_invalid, "fold types don't match",
71 goto error);
72 #endif
73 el_dim = FN(EL,get_space(el));
74 isl_assert(ctx, isl_space_is_equal(pw->dim, el_dim), goto error);
75 isl_assert(ctx, pw->n < pw->size, goto error);
76
77 pw->p[pw->n].set = set;
78 pw->p[pw->n].FIELD = el;
79 pw->n++;
80
81 isl_space_free(el_dim);
82 return pw;
83 error:
84 isl_space_free(el_dim);
85 FN(PW,free)(pw);
86 isl_set_free(set);
87 FN(EL,free)(el);
88 return NULL;
89 }
90
91 #ifdef HAS_TYPE
92 __isl_give PW *FN(PW,alloc)(enum isl_fold type,
93 __isl_take isl_set *set, __isl_take EL *el)
94 #else
95 __isl_give PW *FN(PW,alloc)(__isl_take isl_set *set, __isl_take EL *el)
96 #endif
97 {
98 PW *pw;
99
100 if (!set || !el)
101 goto error;
102
103 #ifdef HAS_TYPE
104 pw = FN(PW,alloc_size)(FN(EL,get_space)(el), type, 1);
105 #else
106 pw = FN(PW,alloc_size)(FN(EL,get_space)(el), 1);
107 #endif
108
109 return FN(PW,add_piece)(pw, set, el);
110 error:
111 isl_set_free(set);
112 FN(EL,free)(el);
113 return NULL;
114 }
115
116 __isl_give PW *FN(PW,dup)(__isl_keep PW *pw)
117 {
118 int i;
119 PW *dup;
120
121 if (!pw)
122 return NULL;
123
124 #ifdef HAS_TYPE
125 dup = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->type, pw->n);
126 #else
127 dup = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->n);
128 #endif
129 if (!dup)
130 return NULL;
131
132 for (i = 0; i < pw->n; ++i)
133 dup = FN(PW,add_piece)(dup, isl_set_copy(pw->p[i].set),
134 FN(EL,copy)(pw->p[i].FIELD));
135
136 return dup;
137 }
138
139 __isl_give PW *FN(PW,cow)(__isl_take PW *pw)
140 {
141 if (!pw)
142 return NULL;
143
144 if (pw->ref == 1)
145 return pw;
146 pw->ref--;
147 return FN(PW,dup)(pw);
148 }
149
150 __isl_give PW *FN(PW,copy)(__isl_keep PW *pw)
151 {
152 if (!pw)
153 return NULL;
154
155 pw->ref++;
156 return pw;
157 }
158
159 void *FN(PW,free)(__isl_take PW *pw)
160 {
161 int i;
162
163 if (!pw)
164 return NULL;
165 if (--pw->ref > 0)
166 return NULL;
167
168 for (i = 0; i < pw->n; ++i) {
169 isl_set_free(pw->p[i].set);
170 FN(EL,free)(pw->p[i].FIELD);
171 }
172 isl_space_free(pw->dim);
173 free(pw);
174
175 return NULL;
176 }
177
178 const char *FN(PW,get_dim_name)(__isl_keep PW *pw, enum isl_dim_type type,
179 unsigned pos)
180 {
181 return pw ? isl_space_get_dim_name(pw->dim, type, pos) : NULL;
182 }
183
184 int FN(PW,has_dim_id)(__isl_keep PW *pw, enum isl_dim_type type, unsigned pos)
185 {
186 return pw ? isl_space_has_dim_id(pw->dim, type, pos) : -1;
187 }
188
189 __isl_give isl_id *FN(PW,get_dim_id)(__isl_keep PW *pw, enum isl_dim_type type,
190 unsigned pos)
191 {
192 return pw ? isl_space_get_dim_id(pw->dim, type, pos) : NULL;
193 }
194
195 int FN(PW,has_tuple_name)(__isl_keep PW *pw, enum isl_dim_type type)
196 {
197 return pw ? isl_space_has_tuple_name(pw->dim, type) : -1;
198 }
199
200 const char *FN(PW,get_tuple_name)(__isl_keep PW *pw, enum isl_dim_type type)
201 {
202 return pw ? isl_space_get_tuple_name(pw->dim, type) : NULL;
203 }
204
205 int FN(PW,has_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
206 {
207 return pw ? isl_space_has_tuple_id(pw->dim, type) : -1;
208 }
209
210 __isl_give isl_id *FN(PW,get_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
211 {
212 return pw ? isl_space_get_tuple_id(pw->dim, type) : NULL;
213 }
214
215 int FN(PW,IS_ZERO)(__isl_keep PW *pw)
216 {
217 if (!pw)
218 return -1;
219
220 return pw->n == 0;
221 }
222
223 #ifndef NO_REALIGN
224 __isl_give PW *FN(PW,realign_domain)(__isl_take PW *pw,
225 __isl_take isl_reordering *exp)
226 {
227 int i;
228
229 pw = FN(PW,cow)(pw);
230 if (!pw || !exp)
231 goto error;
232
233 for (i = 0; i < pw->n; ++i) {
234 pw->p[i].set = isl_set_realign(pw->p[i].set,
235 isl_reordering_copy(exp));
236 if (!pw->p[i].set)
237 goto error;
238 pw->p[i].FIELD = FN(EL,realign_domain)(pw->p[i].FIELD,
239 isl_reordering_copy(exp));
240 if (!pw->p[i].FIELD)
241 goto error;
242 }
243
244 pw = FN(PW,reset_domain_space)(pw, isl_space_copy(exp->dim));
245
246 isl_reordering_free(exp);
247 return pw;
248 error:
249 isl_reordering_free(exp);
250 FN(PW,free)(pw);
251 return NULL;
252 }
253
254 /* Align the parameters of "pw" to those of "model".
255 */
256 __isl_give PW *FN(PW,align_params)(__isl_take PW *pw, __isl_take isl_space *model)
257 {
258 isl_ctx *ctx;
259
260 if (!pw || !model)
261 goto error;
262
263 ctx = isl_space_get_ctx(model);
264 if (!isl_space_has_named_params(model))
265 isl_die(ctx, isl_error_invalid,
266 "model has unnamed parameters", goto error);
267 if (!isl_space_has_named_params(pw->dim))
268 isl_die(ctx, isl_error_invalid,
269 "input has unnamed parameters", goto error);
270 if (!isl_space_match(pw->dim, isl_dim_param, model, isl_dim_param)) {
271 isl_reordering *exp;
272
273 model = isl_space_drop_dims(model, isl_dim_in,
274 0, isl_space_dim(model, isl_dim_in));
275 model = isl_space_drop_dims(model, isl_dim_out,
276 0, isl_space_dim(model, isl_dim_out));
277 exp = isl_parameter_alignment_reordering(pw->dim, model);
278 exp = isl_reordering_extend_space(exp,
279 FN(PW,get_domain_space)(pw));
280 pw = FN(PW,realign_domain)(pw, exp);
281 }
282
283 isl_space_free(model);
284 return pw;
285 error:
286 isl_space_free(model);
287 FN(PW,free)(pw);
288 return NULL;
289 }
290
291 static __isl_give PW *FN(PW,align_params_pw_pw_and)(__isl_take PW *pw1,
292 __isl_take PW *pw2,
293 __isl_give PW *(*fn)(__isl_take PW *pw1, __isl_take PW *pw2))
294 {
295 isl_ctx *ctx;
296
297 if (!pw1 || !pw2)
298 goto error;
299 if (isl_space_match(pw1->dim, isl_dim_param, pw2->dim, isl_dim_param))
300 return fn(pw1, pw2);
301 ctx = FN(PW,get_ctx)(pw1);
302 if (!isl_space_has_named_params(pw1->dim) ||
303 !isl_space_has_named_params(pw2->dim))
304 isl_die(ctx, isl_error_invalid,
305 "unaligned unnamed parameters", goto error);
306 pw1 = FN(PW,align_params)(pw1, FN(PW,get_space)(pw2));
307 pw2 = FN(PW,align_params)(pw2, FN(PW,get_space)(pw1));
308 return fn(pw1, pw2);
309 error:
310 FN(PW,free)(pw1);
311 FN(PW,free)(pw2);
312 return NULL;
313 }
314
315 static __isl_give PW *FN(PW,align_params_pw_set_and)(__isl_take PW *pw,
316 __isl_take isl_set *set,
317 __isl_give PW *(*fn)(__isl_take PW *pw, __isl_take isl_set *set))
318 {
319 isl_ctx *ctx;
320
321 if (!pw || !set)
322 goto error;
323 if (isl_space_match(pw->dim, isl_dim_param, set->dim, isl_dim_param))
324 return fn(pw, set);
325 ctx = FN(PW,get_ctx)(pw);
326 if (!isl_space_has_named_params(pw->dim) ||
327 !isl_space_has_named_params(set->dim))
328 isl_die(ctx, isl_error_invalid,
329 "unaligned unnamed parameters", goto error);
330 pw = FN(PW,align_params)(pw, isl_set_get_space(set));
331 set = isl_set_align_params(set, FN(PW,get_space)(pw));
332 return fn(pw, set);
333 error:
334 FN(PW,free)(pw);
335 isl_set_free(set);
336 return NULL;
337 }
338 #endif
339
340 static __isl_give PW *FN(PW,union_add_aligned)(__isl_take PW *pw1,
341 __isl_take PW *pw2)
342 {
343 int i, j, n;
344 struct PW *res;
345 isl_ctx *ctx;
346 isl_set *set;
347
348 if (!pw1 || !pw2)
349 goto error;
350
351 ctx = isl_space_get_ctx(pw1->dim);
352 #ifdef HAS_TYPE
353 if (pw1->type != pw2->type)
354 isl_die(ctx, isl_error_invalid,
355 "fold types don't match", goto error);
356 #endif
357 isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
358
359 if (FN(PW,IS_ZERO)(pw1)) {
360 FN(PW,free)(pw1);
361 return pw2;
362 }
363
364 if (FN(PW,IS_ZERO)(pw2)) {
365 FN(PW,free)(pw2);
366 return pw1;
367 }
368
369 n = (pw1->n + 1) * (pw2->n + 1);
370 #ifdef HAS_TYPE
371 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), pw1->type, n);
372 #else
373 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), n);
374 #endif
375
376 for (i = 0; i < pw1->n; ++i) {
377 set = isl_set_copy(pw1->p[i].set);
378 for (j = 0; j < pw2->n; ++j) {
379 struct isl_set *common;
380 EL *sum;
381 common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
382 isl_set_copy(pw2->p[j].set));
383 if (isl_set_plain_is_empty(common)) {
384 isl_set_free(common);
385 continue;
386 }
387 set = isl_set_subtract(set,
388 isl_set_copy(pw2->p[j].set));
389
390 sum = FN(EL,add_on_domain)(common,
391 FN(EL,copy)(pw1->p[i].FIELD),
392 FN(EL,copy)(pw2->p[j].FIELD));
393
394 res = FN(PW,add_piece)(res, common, sum);
395 }
396 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw1->p[i].FIELD));
397 }
398
399 for (j = 0; j < pw2->n; ++j) {
400 set = isl_set_copy(pw2->p[j].set);
401 for (i = 0; i < pw1->n; ++i)
402 set = isl_set_subtract(set,
403 isl_set_copy(pw1->p[i].set));
404 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw2->p[j].FIELD));
405 }
406
407 FN(PW,free)(pw1);
408 FN(PW,free)(pw2);
409
410 return res;
411 error:
412 FN(PW,free)(pw1);
413 FN(PW,free)(pw2);
414 return NULL;
415 }
416
417 /* Private version of "union_add". For isl_pw_qpolynomial and
418 * isl_pw_qpolynomial_fold, we prefer to simply call it "add".
419 */
420 static __isl_give PW *FN(PW,union_add_)(__isl_take PW *pw1, __isl_take PW *pw2)
421 {
422 return FN(PW,align_params_pw_pw_and)(pw1, pw2,
423 &FN(PW,union_add_aligned));
424 }
425
426 /* Make sure "pw" has room for at least "n" more pieces.
427 *
428 * If there is only one reference to pw, we extend it in place.
429 * Otherwise, we create a new PW and copy the pieces.
430 */
431 static __isl_give PW *FN(PW,grow)(__isl_take PW *pw, int n)
432 {
433 int i;
434 isl_ctx *ctx;
435 PW *res;
436
437 if (!pw)
438 return NULL;
439 if (pw->n + n <= pw->size)
440 return pw;
441 ctx = FN(PW,get_ctx)(pw);
442 n += pw->n;
443 if (pw->ref == 1) {
444 res = isl_realloc(ctx, pw, struct PW,
445 sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
446 if (!res)
447 return FN(PW,free)(pw);
448 res->size = n;
449 return res;
450 }
451 #ifdef HAS_TYPE
452 res = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->type, n);
453 #else
454 res = FN(PW,alloc_size)(isl_space_copy(pw->dim), n);
455 #endif
456 if (!res)
457 return FN(PW,free)(pw);
458 for (i = 0; i < pw->n; ++i)
459 res = FN(PW,add_piece)(res, isl_set_copy(pw->p[i].set),
460 FN(EL,copy)(pw->p[i].FIELD));
461 FN(PW,free)(pw);
462 return res;
463 }
464
465 static __isl_give PW *FN(PW,add_disjoint_aligned)(__isl_take PW *pw1,
466 __isl_take PW *pw2)
467 {
468 int i;
469 isl_ctx *ctx;
470
471 if (!pw1 || !pw2)
472 goto error;
473
474 if (pw1->size < pw1->n + pw2->n && pw1->n < pw2->n)
475 return FN(PW,add_disjoint_aligned)(pw2, pw1);
476
477 ctx = isl_space_get_ctx(pw1->dim);
478 #ifdef HAS_TYPE
479 if (pw1->type != pw2->type)
480 isl_die(ctx, isl_error_invalid,
481 "fold types don't match", goto error);
482 #endif
483 isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
484
485 if (FN(PW,IS_ZERO)(pw1)) {
486 FN(PW,free)(pw1);
487 return pw2;
488 }
489
490 if (FN(PW,IS_ZERO)(pw2)) {
491 FN(PW,free)(pw2);
492 return pw1;
493 }
494
495 pw1 = FN(PW,grow)(pw1, pw2->n);
496 if (!pw1)
497 goto error;
498
499 for (i = 0; i < pw2->n; ++i)
500 pw1 = FN(PW,add_piece)(pw1,
501 isl_set_copy(pw2->p[i].set),
502 FN(EL,copy)(pw2->p[i].FIELD));
503
504 FN(PW,free)(pw2);
505
506 return pw1;
507 error:
508 FN(PW,free)(pw1);
509 FN(PW,free)(pw2);
510 return NULL;
511 }
512
513 __isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
514 {
515 return FN(PW,align_params_pw_pw_and)(pw1, pw2,
516 &FN(PW,add_disjoint_aligned));
517 }
518
519 /* This function is currently only used from isl_aff.c
520 */
521 static __isl_give PW *FN(PW,on_shared_domain_in)(__isl_take PW *pw1,
522 __isl_take PW *pw2, __isl_take isl_space *space,
523 __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
524 __attribute__ ((unused));
525
526 /* Apply "fn" to pairs of elements from pw1 and pw2 on shared domains.
527 * The result of "fn" (and therefore also of this function) lives in "space".
528 */
529 static __isl_give PW *FN(PW,on_shared_domain_in)(__isl_take PW *pw1,
530 __isl_take PW *pw2, __isl_take isl_space *space,
531 __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
532 {
533 int i, j, n;
534 PW *res = NULL;
535
536 if (!pw1 || !pw2)
537 goto error;
538
539 n = pw1->n * pw2->n;
540 #ifdef HAS_TYPE
541 res = FN(PW,alloc_size)(isl_space_copy(space), pw1->type, n);
542 #else
543 res = FN(PW,alloc_size)(isl_space_copy(space), n);
544 #endif
545
546 for (i = 0; i < pw1->n; ++i) {
547 for (j = 0; j < pw2->n; ++j) {
548 isl_set *common;
549 EL *res_ij;
550 int empty;
551
552 common = isl_set_intersect(
553 isl_set_copy(pw1->p[i].set),
554 isl_set_copy(pw2->p[j].set));
555 empty = isl_set_plain_is_empty(common);
556 if (empty < 0 || empty) {
557 isl_set_free(common);
558 if (empty < 0)
559 goto error;
560 continue;
561 }
562
563 res_ij = fn(FN(EL,copy)(pw1->p[i].FIELD),
564 FN(EL,copy)(pw2->p[j].FIELD));
565 res_ij = FN(EL,gist)(res_ij, isl_set_copy(common));
566
567 res = FN(PW,add_piece)(res, common, res_ij);
568 }
569 }
570
571 isl_space_free(space);
572 FN(PW,free)(pw1);
573 FN(PW,free)(pw2);
574 return res;
575 error:
576 isl_space_free(space);
577 FN(PW,free)(pw1);
578 FN(PW,free)(pw2);
579 FN(PW,free)(res);
580 return NULL;
581 }
582
583 /* This function is currently only used from isl_aff.c
584 */
585 static __isl_give PW *FN(PW,on_shared_domain)(__isl_take PW *pw1,
586 __isl_take PW *pw2,
587 __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
588 __attribute__ ((unused));
589
590 /* Apply "fn" to pairs of elements from pw1 and pw2 on shared domains.
591 * The result of "fn" is assumed to live in the same space as "pw1" and "pw2".
592 */
593 static __isl_give PW *FN(PW,on_shared_domain)(__isl_take PW *pw1,
594 __isl_take PW *pw2,
595 __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
596 {
597 isl_space *space;
598
599 if (!pw1 || !pw2)
600 goto error;
601
602 space = isl_space_copy(pw1->dim);
603 return FN(PW,on_shared_domain_in)(pw1, pw2, space, fn);
604 error:
605 FN(PW,free)(pw1);
606 FN(PW,free)(pw2);
607 return NULL;
608 }
609
610 #ifndef NO_NEG
611 __isl_give PW *FN(PW,neg)(__isl_take PW *pw)
612 {
613 int i;
614
615 if (!pw)
616 return NULL;
617
618 if (FN(PW,IS_ZERO)(pw))
619 return pw;
620
621 pw = FN(PW,cow)(pw);
622 if (!pw)
623 return NULL;
624
625 for (i = 0; i < pw->n; ++i) {
626 pw->p[i].FIELD = FN(EL,neg)(pw->p[i].FIELD);
627 if (!pw->p[i].FIELD)
628 return FN(PW,free)(pw);
629 }
630
631 return pw;
632 }
633
634 __isl_give PW *FN(PW,sub)(__isl_take PW *pw1, __isl_take PW *pw2)
635 {
636 return FN(PW,add)(pw1, FN(PW,neg)(pw2));
637 }
638 #endif
639
640 #ifndef NO_EVAL
641 __isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
642 __isl_take isl_point *pnt)
643 {
644 int i;
645 int found = 0;
646 isl_ctx *ctx;
647 isl_space *pnt_dim = NULL;
648 isl_qpolynomial *qp;
649
650 if (!pw || !pnt)
651 goto error;
652 ctx = isl_point_get_ctx(pnt);
653 pnt_dim = isl_point_get_space(pnt);
654 isl_assert(ctx, isl_space_is_domain_internal(pnt_dim, pw->dim),
655 goto error);
656
657 for (i = 0; i < pw->n; ++i) {
658 found = isl_set_contains_point(pw->p[i].set, pnt);
659 if (found < 0)
660 goto error;
661 if (found)
662 break;
663 }
664 if (found)
665 qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
666 isl_point_copy(pnt));
667 else
668 qp = isl_qpolynomial_zero_on_domain(FN(PW,get_domain_space)(pw));
669 FN(PW,free)(pw);
670 isl_space_free(pnt_dim);
671 isl_point_free(pnt);
672 return qp;
673 error:
674 FN(PW,free)(pw);
675 isl_space_free(pnt_dim);
676 isl_point_free(pnt);
677 return NULL;
678 }
679 #endif
680
681 __isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
682 {
683 int i;
684 isl_set *dom;
685
686 if (!pw)
687 return NULL;
688
689 dom = isl_set_empty(FN(PW,get_domain_space)(pw));
690 for (i = 0; i < pw->n; ++i)
691 dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
692
693 FN(PW,free)(pw);
694
695 return dom;
696 }
697
698 /* Restrict the domain of "pw" by combining each cell
699 * with "set" through a call to "fn", where "fn" may be
700 * isl_set_intersect or isl_set_intersect_params.
701 */
702 static __isl_give PW *FN(PW,intersect_aligned)(__isl_take PW *pw,
703 __isl_take isl_set *set,
704 __isl_give isl_set *(*fn)(__isl_take isl_set *set1,
705 __isl_take isl_set *set2))
706 {
707 int i;
708
709 if (!pw || !set)
710 goto error;
711
712 if (pw->n == 0) {
713 isl_set_free(set);
714 return pw;
715 }
716
717 pw = FN(PW,cow)(pw);
718 if (!pw)
719 goto error;
720
721 for (i = pw->n - 1; i >= 0; --i) {
722 isl_basic_set *aff;
723 pw->p[i].set = fn(pw->p[i].set, isl_set_copy(set));
724 if (!pw->p[i].set)
725 goto error;
726 aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
727 pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
728 aff);
729 if (!pw->p[i].FIELD)
730 goto error;
731 if (isl_set_plain_is_empty(pw->p[i].set)) {
732 isl_set_free(pw->p[i].set);
733 FN(EL,free)(pw->p[i].FIELD);
734 if (i != pw->n - 1)
735 pw->p[i] = pw->p[pw->n - 1];
736 pw->n--;
737 }
738 }
739
740 isl_set_free(set);
741 return pw;
742 error:
743 isl_set_free(set);
744 FN(PW,free)(pw);
745 return NULL;
746 }
747
748 static __isl_give PW *FN(PW,intersect_domain_aligned)(__isl_take PW *pw,
749 __isl_take isl_set *set)
750 {
751 return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect);
752 }
753
754 __isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw,
755 __isl_take isl_set *context)
756 {
757 return FN(PW,align_params_pw_set_and)(pw, context,
758 &FN(PW,intersect_domain_aligned));
759 }
760
761 static __isl_give PW *FN(PW,intersect_params_aligned)(__isl_take PW *pw,
762 __isl_take isl_set *set)
763 {
764 return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect_params);
765 }
766
767 /* Intersect the domain of "pw" with the parameter domain "context".
768 */
769 __isl_give PW *FN(PW,intersect_params)(__isl_take PW *pw,
770 __isl_take isl_set *context)
771 {
772 return FN(PW,align_params_pw_set_and)(pw, context,
773 &FN(PW,intersect_params_aligned));
774 }
775
776 static __isl_give PW *FN(PW,gist_aligned)(__isl_take PW *pw,
777 __isl_take isl_set *context,
778 __isl_give EL *(*fn_el)(__isl_take EL *el,
779 __isl_take isl_set *set),
780 __isl_give isl_set *(*fn_dom)(__isl_take isl_set *set,
781 __isl_take isl_basic_set *bset))
782 {
783 int i;
784 isl_basic_set *hull = NULL;
785
786 if (!pw || !context)
787 goto error;
788
789 if (pw->n == 0) {
790 isl_set_free(context);
791 return pw;
792 }
793
794 if (!isl_space_match(pw->dim, isl_dim_param,
795 context->dim, isl_dim_param)) {
796 pw = FN(PW,align_params)(pw, isl_set_get_space(context));
797 context = isl_set_align_params(context, FN(PW,get_space)(pw));
798 }
799
800 context = isl_set_compute_divs(context);
801 hull = isl_set_simple_hull(isl_set_copy(context));
802
803 pw = FN(PW,cow)(pw);
804 if (!pw)
805 goto error;
806
807 for (i = pw->n - 1; i >= 0; --i) {
808 isl_set *set_i;
809 int empty;
810
811 set_i = isl_set_intersect(isl_set_copy(pw->p[i].set),
812 isl_set_copy(context));
813 empty = isl_set_plain_is_empty(set_i);
814 pw->p[i].FIELD = fn_el(pw->p[i].FIELD, set_i);
815 pw->p[i].set = fn_dom(pw->p[i].set, isl_basic_set_copy(hull));
816 if (!pw->p[i].FIELD || !pw->p[i].set)
817 goto error;
818 if (empty) {
819 isl_set_free(pw->p[i].set);
820 FN(EL,free)(pw->p[i].FIELD);
821 if (i != pw->n - 1)
822 pw->p[i] = pw->p[pw->n - 1];
823 pw->n--;
824 }
825 }
826
827 isl_basic_set_free(hull);
828 isl_set_free(context);
829
830 return pw;
831 error:
832 FN(PW,free)(pw);
833 isl_basic_set_free(hull);
834 isl_set_free(context);
835 return NULL;
836 }
837
838 static __isl_give PW *FN(PW,gist_domain_aligned)(__isl_take PW *pw,
839 __isl_take isl_set *set)
840 {
841 return FN(PW,gist_aligned)(pw, set, &FN(EL,gist),
842 &isl_set_gist_basic_set);
843 }
844
845 __isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
846 {
847 return FN(PW,align_params_pw_set_and)(pw, context,
848 &FN(PW,gist_domain_aligned));
849 }
850
851 static __isl_give PW *FN(PW,gist_params_aligned)(__isl_take PW *pw,
852 __isl_take isl_set *set)
853 {
854 return FN(PW,gist_aligned)(pw, set, &FN(EL,gist_params),
855 &isl_set_gist_params_basic_set);
856 }
857
858 __isl_give PW *FN(PW,gist_params)(__isl_take PW *pw,
859 __isl_take isl_set *context)
860 {
861 return FN(PW,align_params_pw_set_and)(pw, context,
862 &FN(PW,gist_params_aligned));
863 }
864
865 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
866 {
867 int i, j;
868
869 if (!pw)
870 return NULL;
871 if (pw->n == 0)
872 return pw;
873
874 for (i = pw->n - 1; i >= 0; --i) {
875 for (j = i - 1; j >= 0; --j) {
876 if (!FN(EL,plain_is_equal)(pw->p[i].FIELD,
877 pw->p[j].FIELD))
878 continue;
879 pw->p[j].set = isl_set_union(pw->p[j].set,
880 pw->p[i].set);
881 FN(EL,free)(pw->p[i].FIELD);
882 if (i != pw->n - 1)
883 pw->p[i] = pw->p[pw->n - 1];
884 pw->n--;
885 break;
886 }
887 if (j >= 0)
888 continue;
889 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
890 if (!pw->p[i].set)
891 goto error;
892 }
893
894 return pw;
895 error:
896 FN(PW,free)(pw);
897 return NULL;
898 }
899
900 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
901 {
902 return pw ? isl_space_get_ctx(pw->dim) : NULL;
903 }
904
905 #ifndef NO_INVOLVES_DIMS
906 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
907 unsigned first, unsigned n)
908 {
909 int i;
910 enum isl_dim_type set_type;
911
912 if (!pw)
913 return -1;
914 if (pw->n == 0 || n == 0)
915 return 0;
916
917 set_type = type == isl_dim_in ? isl_dim_set : type;
918
919 for (i = 0; i < pw->n; ++i) {
920 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
921 type, first, n);
922 if (involves < 0 || involves)
923 return involves;
924 involves = isl_set_involves_dims(pw->p[i].set,
925 set_type, first, n);
926 if (involves < 0 || involves)
927 return involves;
928 }
929 return 0;
930 }
931 #endif
932
933 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
934 enum isl_dim_type type, unsigned pos, const char *s)
935 {
936 int i;
937 enum isl_dim_type set_type;
938
939 pw = FN(PW,cow)(pw);
940 if (!pw)
941 return NULL;
942
943 set_type = type == isl_dim_in ? isl_dim_set : type;
944
945 pw->dim = isl_space_set_dim_name(pw->dim, type, pos, s);
946 if (!pw->dim)
947 goto error;
948
949 for (i = 0; i < pw->n; ++i) {
950 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set,
951 set_type, pos, s);
952 if (!pw->p[i].set)
953 goto error;
954 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
955 if (!pw->p[i].FIELD)
956 goto error;
957 }
958
959 return pw;
960 error:
961 FN(PW,free)(pw);
962 return NULL;
963 }
964
965 #ifndef NO_DROP_DIMS
966 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
967 enum isl_dim_type type, unsigned first, unsigned n)
968 {
969 int i;
970 enum isl_dim_type set_type;
971
972 if (!pw)
973 return NULL;
974 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
975 return pw;
976
977 set_type = type == isl_dim_in ? isl_dim_set : type;
978
979 pw = FN(PW,cow)(pw);
980 if (!pw)
981 return NULL;
982 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
983 if (!pw->dim)
984 goto error;
985 for (i = 0; i < pw->n; ++i) {
986 pw->p[i].set = isl_set_drop(pw->p[i].set, set_type, first, n);
987 if (!pw->p[i].set)
988 goto error;
989 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
990 if (!pw->p[i].FIELD)
991 goto error;
992 }
993
994 return pw;
995 error:
996 FN(PW,free)(pw);
997 return NULL;
998 }
999
1000 /* This function is very similar to drop_dims.
1001 * The only difference is that the cells may still involve
1002 * the specified dimensions. They are removed using
1003 * isl_set_project_out instead of isl_set_drop.
1004 */
1005 __isl_give PW *FN(PW,project_out)(__isl_take PW *pw,
1006 enum isl_dim_type type, unsigned first, unsigned n)
1007 {
1008 int i;
1009 enum isl_dim_type set_type;
1010
1011 if (!pw)
1012 return NULL;
1013 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
1014 return pw;
1015
1016 set_type = type == isl_dim_in ? isl_dim_set : type;
1017
1018 pw = FN(PW,cow)(pw);
1019 if (!pw)
1020 return NULL;
1021 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
1022 if (!pw->dim)
1023 goto error;
1024 for (i = 0; i < pw->n; ++i) {
1025 pw->p[i].set = isl_set_project_out(pw->p[i].set,
1026 set_type, first, n);
1027 if (!pw->p[i].set)
1028 goto error;
1029 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
1030 if (!pw->p[i].FIELD)
1031 goto error;
1032 }
1033
1034 return pw;
1035 error:
1036 FN(PW,free)(pw);
1037 return NULL;
1038 }
1039
1040 /* Project the domain of pw onto its parameter space.
1041 */
1042 __isl_give PW *FN(PW,project_domain_on_params)(__isl_take PW *pw)
1043 {
1044 isl_space *space;
1045 unsigned n;
1046
1047 n = FN(PW,dim)(pw, isl_dim_in);
1048 pw = FN(PW,project_out)(pw, isl_dim_in, 0, n);
1049 space = FN(PW,get_domain_space)(pw);
1050 space = isl_space_params(space);
1051 pw = FN(PW,reset_domain_space)(pw, space);
1052 return pw;
1053 }
1054 #endif
1055
1056 #ifndef NO_INSERT_DIMS
1057 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
1058 unsigned first, unsigned n)
1059 {
1060 int i;
1061 enum isl_dim_type set_type;
1062
1063 if (!pw)
1064 return NULL;
1065 if (n == 0 && !isl_space_is_named_or_nested(pw->dim, type))
1066 return pw;
1067
1068 set_type = type == isl_dim_in ? isl_dim_set : type;
1069
1070 pw = FN(PW,cow)(pw);
1071 if (!pw)
1072 return NULL;
1073
1074 pw->dim = isl_space_insert_dims(pw->dim, type, first, n);
1075 if (!pw->dim)
1076 goto error;
1077
1078 for (i = 0; i < pw->n; ++i) {
1079 pw->p[i].set = isl_set_insert_dims(pw->p[i].set,
1080 set_type, first, n);
1081 if (!pw->p[i].set)
1082 goto error;
1083 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
1084 type, first, n);
1085 if (!pw->p[i].FIELD)
1086 goto error;
1087 }
1088
1089 return pw;
1090 error:
1091 FN(PW,free)(pw);
1092 return NULL;
1093 }
1094 #endif
1095
1096 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
1097 enum isl_dim_type type, unsigned pos, isl_int v)
1098 {
1099 int i;
1100
1101 if (!pw)
1102 return NULL;
1103
1104 if (type == isl_dim_in)
1105 type = isl_dim_set;
1106
1107 pw = FN(PW,cow)(pw);
1108 if (!pw)
1109 return NULL;
1110 for (i = 0; i < pw->n; ++i) {
1111 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
1112 if (!pw->p[i].set)
1113 goto error;
1114 }
1115
1116 return pw;
1117 error:
1118 FN(PW,free)(pw);
1119 return NULL;
1120 }
1121
1122 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
1123 {
1124 return pw ? isl_space_dim(pw->dim, type) : 0;
1125 }
1126
1127 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
1128 enum isl_dim_type type, unsigned first, unsigned n)
1129 {
1130 int i;
1131
1132 if (!pw)
1133 return NULL;
1134 if (n == 0)
1135 return pw;
1136
1137 if (type == isl_dim_in)
1138 type = isl_dim_set;
1139
1140 pw = FN(PW,cow)(pw);
1141 if (!pw)
1142 return NULL;
1143 if (!pw->dim)
1144 goto error;
1145 for (i = 0; i < pw->n; ++i) {
1146 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
1147 if (!pw->p[i].set)
1148 goto error;
1149 }
1150
1151 return pw;
1152 error:
1153 FN(PW,free)(pw);
1154 return NULL;
1155 }
1156
1157 #ifndef NO_OPT
1158 /* Compute the maximal value attained by the piecewise quasipolynomial
1159 * on its domain or zero if the domain is empty.
1160 * In the worst case, the domain is scanned completely,
1161 * so the domain is assumed to be bounded.
1162 */
1163 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
1164 {
1165 int i;
1166 isl_qpolynomial *opt;
1167
1168 if (!pw)
1169 return NULL;
1170
1171 if (pw->n == 0) {
1172 isl_space *dim = isl_space_copy(pw->dim);
1173 FN(PW,free)(pw);
1174 return isl_qpolynomial_zero_on_domain(isl_space_domain(dim));
1175 }
1176
1177 opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
1178 isl_set_copy(pw->p[0].set), max);
1179 for (i = 1; i < pw->n; ++i) {
1180 isl_qpolynomial *opt_i;
1181 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
1182 isl_set_copy(pw->p[i].set), max);
1183 if (max)
1184 opt = isl_qpolynomial_max_cst(opt, opt_i);
1185 else
1186 opt = isl_qpolynomial_min_cst(opt, opt_i);
1187 }
1188
1189 FN(PW,free)(pw);
1190 return opt;
1191 }
1192
1193 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
1194 {
1195 return FN(PW,opt)(pw, 1);
1196 }
1197
1198 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
1199 {
1200 return FN(PW,opt)(pw, 0);
1201 }
1202 #endif
1203
1204 __isl_give isl_space *FN(PW,get_space)(__isl_keep PW *pw)
1205 {
1206 return pw ? isl_space_copy(pw->dim) : NULL;
1207 }
1208
1209 __isl_give isl_space *FN(PW,get_domain_space)(__isl_keep PW *pw)
1210 {
1211 return pw ? isl_space_domain(isl_space_copy(pw->dim)) : NULL;
1212 }
1213
1214 #ifndef NO_RESET_DIM
1215 /* Reset the space of "pw". Since we don't know if the elements
1216 * represent the spaces themselves or their domains, we pass along
1217 * both when we call their reset_space_and_domain.
1218 */
1219 static __isl_give PW *FN(PW,reset_space_and_domain)(__isl_take PW *pw,
1220 __isl_take isl_space *space, __isl_take isl_space *domain)
1221 {
1222 int i;
1223
1224 pw = FN(PW,cow)(pw);
1225 if (!pw || !space || !domain)
1226 goto error;
1227
1228 for (i = 0; i < pw->n; ++i) {
1229 pw->p[i].set = isl_set_reset_space(pw->p[i].set,
1230 isl_space_copy(domain));
1231 if (!pw->p[i].set)
1232 goto error;
1233 pw->p[i].FIELD = FN(EL,reset_space_and_domain)(pw->p[i].FIELD,
1234 isl_space_copy(space), isl_space_copy(domain));
1235 if (!pw->p[i].FIELD)
1236 goto error;
1237 }
1238
1239 isl_space_free(domain);
1240
1241 isl_space_free(pw->dim);
1242 pw->dim = space;
1243
1244 return pw;
1245 error:
1246 isl_space_free(domain);
1247 isl_space_free(space);
1248 FN(PW,free)(pw);
1249 return NULL;
1250 }
1251
1252 __isl_give PW *FN(PW,reset_domain_space)(__isl_take PW *pw,
1253 __isl_take isl_space *domain)
1254 {
1255 isl_space *space;
1256
1257 space = isl_space_extend_domain_with_range(isl_space_copy(domain),
1258 FN(PW,get_space)(pw));
1259 return FN(PW,reset_space_and_domain)(pw, space, domain);
1260 }
1261
1262 __isl_give PW *FN(PW,reset_space)(__isl_take PW *pw, __isl_take isl_space *dim)
1263 {
1264 isl_space *domain;
1265
1266 domain = isl_space_domain(isl_space_copy(dim));
1267 return FN(PW,reset_space_and_domain)(pw, dim, domain);
1268 }
1269
1270 __isl_give PW *FN(PW,set_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type,
1271 __isl_take isl_id *id)
1272 {
1273 isl_space *space;
1274
1275 pw = FN(PW,cow)(pw);
1276 if (!pw)
1277 return isl_id_free(id);
1278
1279 space = FN(PW,get_space)(pw);
1280 space = isl_space_set_tuple_id(space, type, id);
1281
1282 return FN(PW,reset_space)(pw, space);
1283 }
1284
1285 __isl_give PW *FN(PW,set_dim_id)(__isl_take PW *pw,
1286 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
1287 {
1288 pw = FN(PW,cow)(pw);
1289 if (!pw)
1290 return isl_id_free(id);
1291 pw->dim = isl_space_set_dim_id(pw->dim, type, pos, id);
1292 return FN(PW,reset_space)(pw, isl_space_copy(pw->dim));
1293 }
1294 #endif
1295
1296 int FN(PW,has_equal_space)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1297 {
1298 if (!pw1 || !pw2)
1299 return -1;
1300
1301 return isl_space_is_equal(pw1->dim, pw2->dim);
1302 }
1303
1304 #ifndef NO_MORPH
1305 __isl_give PW *FN(PW,morph_domain)(__isl_take PW *pw,
1306 __isl_take isl_morph *morph)
1307 {
1308 int i;
1309 isl_ctx *ctx;
1310
1311 if (!pw || !morph)
1312 goto error;
1313
1314 ctx = isl_space_get_ctx(pw->dim);
1315 isl_assert(ctx, isl_space_is_domain_internal(morph->dom->dim, pw->dim),
1316 goto error);
1317
1318 pw = FN(PW,cow)(pw);
1319 if (!pw)
1320 goto error;
1321 pw->dim = isl_space_extend_domain_with_range(
1322 isl_space_copy(morph->ran->dim), pw->dim);
1323 if (!pw->dim)
1324 goto error;
1325
1326 for (i = 0; i < pw->n; ++i) {
1327 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
1328 if (!pw->p[i].set)
1329 goto error;
1330 pw->p[i].FIELD = FN(EL,morph_domain)(pw->p[i].FIELD,
1331 isl_morph_copy(morph));
1332 if (!pw->p[i].FIELD)
1333 goto error;
1334 }
1335
1336 isl_morph_free(morph);
1337
1338 return pw;
1339 error:
1340 FN(PW,free)(pw);
1341 isl_morph_free(morph);
1342 return NULL;
1343 }
1344 #endif
1345
1346 int FN(PW,n_piece)(__isl_keep PW *pw)
1347 {
1348 return pw ? pw->n : 0;
1349 }
1350
1351 int FN(PW,foreach_piece)(__isl_keep PW *pw,
1352 int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
1353 void *user)
1354 {
1355 int i;
1356
1357 if (!pw)
1358 return -1;
1359
1360 for (i = 0; i < pw->n; ++i)
1361 if (fn(isl_set_copy(pw->p[i].set),
1362 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
1363 return -1;
1364
1365 return 0;
1366 }
1367
1368 #ifndef NO_LIFT
1369 static int any_divs(__isl_keep isl_set *set)
1370 {
1371 int i;
1372
1373 if (!set)
1374 return -1;
1375
1376 for (i = 0; i < set->n; ++i)
1377 if (set->p[i]->n_div > 0)
1378 return 1;
1379
1380 return 0;
1381 }
1382
1383 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
1384 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1385 void *user), void *user)
1386 {
1387 int i;
1388
1389 if (!set || !el)
1390 goto error;
1391
1392 for (i = 0; i < set->n; ++i) {
1393 isl_set *lift;
1394 EL *copy;
1395
1396 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
1397 lift = isl_set_lift(lift);
1398
1399 copy = FN(EL,copy)(el);
1400 copy = FN(EL,lift)(copy, isl_set_get_space(lift));
1401
1402 if (fn(lift, copy, user) < 0)
1403 goto error;
1404 }
1405
1406 isl_set_free(set);
1407 FN(EL,free)(el);
1408
1409 return 0;
1410 error:
1411 isl_set_free(set);
1412 FN(EL,free)(el);
1413 return -1;
1414 }
1415
1416 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
1417 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1418 void *user), void *user)
1419 {
1420 int i;
1421
1422 if (!pw)
1423 return -1;
1424
1425 for (i = 0; i < pw->n; ++i) {
1426 isl_set *set;
1427 EL *el;
1428
1429 set = isl_set_copy(pw->p[i].set);
1430 el = FN(EL,copy)(pw->p[i].FIELD);
1431 if (!any_divs(set)) {
1432 if (fn(set, el, user) < 0)
1433 return -1;
1434 continue;
1435 }
1436 if (foreach_lifted_subset(set, el, fn, user) < 0)
1437 return -1;
1438 }
1439
1440 return 0;
1441 }
1442 #endif
1443
1444 #ifndef NO_MOVE_DIMS
1445 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
1446 enum isl_dim_type dst_type, unsigned dst_pos,
1447 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1448 {
1449 int i;
1450
1451 pw = FN(PW,cow)(pw);
1452 if (!pw)
1453 return NULL;
1454
1455 pw->dim = isl_space_move_dims(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
1456 if (!pw->dim)
1457 goto error;
1458
1459 for (i = 0; i < pw->n; ++i) {
1460 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
1461 dst_type, dst_pos, src_type, src_pos, n);
1462 if (!pw->p[i].FIELD)
1463 goto error;
1464 }
1465
1466 if (dst_type == isl_dim_in)
1467 dst_type = isl_dim_set;
1468 if (src_type == isl_dim_in)
1469 src_type = isl_dim_set;
1470
1471 for (i = 0; i < pw->n; ++i) {
1472 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
1473 dst_type, dst_pos,
1474 src_type, src_pos, n);
1475 if (!pw->p[i].set)
1476 goto error;
1477 }
1478
1479 return pw;
1480 error:
1481 FN(PW,free)(pw);
1482 return NULL;
1483 }
1484 #endif
1485
1486 __isl_give PW *FN(PW,mul_isl_int)(__isl_take PW *pw, isl_int v)
1487 {
1488 int i;
1489
1490 if (isl_int_is_one(v))
1491 return pw;
1492 if (pw && DEFAULT_IS_ZERO && isl_int_is_zero(v)) {
1493 PW *zero;
1494 isl_space *dim = FN(PW,get_space)(pw);
1495 #ifdef HAS_TYPE
1496 zero = FN(PW,ZERO)(dim, pw->type);
1497 #else
1498 zero = FN(PW,ZERO)(dim);
1499 #endif
1500 FN(PW,free)(pw);
1501 return zero;
1502 }
1503 pw = FN(PW,cow)(pw);
1504 if (!pw)
1505 return NULL;
1506 if (pw->n == 0)
1507 return pw;
1508
1509 #ifdef HAS_TYPE
1510 if (isl_int_is_neg(v))
1511 pw->type = isl_fold_type_negate(pw->type);
1512 #endif
1513 for (i = 0; i < pw->n; ++i) {
1514 pw->p[i].FIELD = FN(EL,scale)(pw->p[i].FIELD, v);
1515 if (!pw->p[i].FIELD)
1516 goto error;
1517 }
1518
1519 return pw;
1520 error:
1521 FN(PW,free)(pw);
1522 return NULL;
1523 }
1524
1525 __isl_give PW *FN(PW,scale)(__isl_take PW *pw, isl_int v)
1526 {
1527 return FN(PW,mul_isl_int)(pw, v);
1528 }
1529
1530 static int FN(PW,qsort_set_cmp)(const void *p1, const void *p2)
1531 {
1532 isl_set *set1 = *(isl_set * const *)p1;
1533 isl_set *set2 = *(isl_set * const *)p2;
1534
1535 return isl_set_plain_cmp(set1, set2);
1536 }
1537
1538 /* We normalize in place, but if anything goes wrong we need
1539 * to return NULL, so we need to make sure we don't change the
1540 * meaning of any possible other copies of map.
1541 */
1542 __isl_give PW *FN(PW,normalize)(__isl_take PW *pw)
1543 {
1544 int i, j;
1545 isl_set *set;
1546
1547 if (!pw)
1548 return NULL;
1549 for (i = 0; i < pw->n; ++i) {
1550 set = isl_set_normalize(isl_set_copy(pw->p[i].set));
1551 if (!set)
1552 return FN(PW,free)(pw);
1553 isl_set_free(pw->p[i].set);
1554 pw->p[i].set = set;
1555 }
1556 qsort(pw->p, pw->n, sizeof(pw->p[0]), &FN(PW,qsort_set_cmp));
1557 for (i = pw->n - 1; i >= 1; --i) {
1558 if (!isl_set_plain_is_equal(pw->p[i - 1].set, pw->p[i].set))
1559 continue;
1560 if (!FN(EL,plain_is_equal)(pw->p[i - 1].FIELD, pw->p[i].FIELD))
1561 continue;
1562 set = isl_set_union(isl_set_copy(pw->p[i - 1].set),
1563 isl_set_copy(pw->p[i].set));
1564 if (!set)
1565 return FN(PW,free)(pw);
1566 isl_set_free(pw->p[i].set);
1567 FN(EL,free)(pw->p[i].FIELD);
1568 isl_set_free(pw->p[i - 1].set);
1569 pw->p[i - 1].set = set;
1570 for (j = i + 1; j < pw->n; ++j)
1571 pw->p[j - 1] = pw->p[j];
1572 pw->n--;
1573 }
1574
1575 return pw;
1576 }
1577
1578 /* Is pw1 obviously equal to pw2?
1579 * That is, do they have obviously identical cells and obviously identical
1580 * elements on each cell?
1581 */
1582 int FN(PW,plain_is_equal)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1583 {
1584 int i;
1585 int equal;
1586
1587 if (!pw1 || !pw2)
1588 return -1;
1589
1590 if (pw1 == pw2)
1591 return 1;
1592 if (!isl_space_is_equal(pw1->dim, pw2->dim))
1593 return 0;
1594
1595 pw1 = FN(PW,copy)(pw1);
1596 pw2 = FN(PW,copy)(pw2);
1597 pw1 = FN(PW,normalize)(pw1);
1598 pw2 = FN(PW,normalize)(pw2);
1599 if (!pw1 || !pw2)
1600 goto error;
1601
1602 equal = pw1->n == pw2->n;
1603 for (i = 0; equal && i < pw1->n; ++i) {
1604 equal = isl_set_plain_is_equal(pw1->p[i].set, pw2->p[i].set);
1605 if (equal < 0)
1606 goto error;
1607 if (!equal)
1608 break;
1609 equal = FN(EL,plain_is_equal)(pw1->p[i].FIELD, pw2->p[i].FIELD);
1610 if (equal < 0)
1611 goto error;
1612 }
1613
1614 FN(PW,free)(pw1);
1615 FN(PW,free)(pw2);
1616 return equal;
1617 error:
1618 FN(PW,free)(pw1);
1619 FN(PW,free)(pw2);
1620 return -1;
1621 }
1622
1623 #ifndef NO_PULLBACK
1624 static __isl_give PW *FN(PW,align_params_pw_multi_aff_and)(__isl_take PW *pw,
1625 __isl_take isl_multi_aff *ma,
1626 __isl_give PW *(*fn)(__isl_take PW *pw, __isl_take isl_multi_aff *ma))
1627 {
1628 isl_ctx *ctx;
1629 isl_space *ma_space;
1630
1631 ma_space = isl_multi_aff_get_space(ma);
1632 if (!pw || !ma || !ma_space)
1633 goto error;
1634 if (isl_space_match(pw->dim, isl_dim_param, ma_space, isl_dim_param)) {
1635 isl_space_free(ma_space);
1636 return fn(pw, ma);
1637 }
1638 ctx = FN(PW,get_ctx)(pw);
1639 if (!isl_space_has_named_params(pw->dim) ||
1640 !isl_space_has_named_params(ma_space))
1641 isl_die(ctx, isl_error_invalid,
1642 "unaligned unnamed parameters", goto error);
1643 pw = FN(PW,align_params)(pw, ma_space);
1644 ma = isl_multi_aff_align_params(ma, FN(PW,get_space)(pw));
1645 return fn(pw, ma);
1646 error:
1647 isl_space_free(ma_space);
1648 FN(PW,free)(pw);
1649 isl_multi_aff_free(ma);
1650 return NULL;
1651 }
1652
1653 static __isl_give PW *FN(PW,align_params_pw_pw_multi_aff_and)(__isl_take PW *pw,
1654 __isl_take isl_pw_multi_aff *pma,
1655 __isl_give PW *(*fn)(__isl_take PW *pw,
1656 __isl_take isl_pw_multi_aff *ma))
1657 {
1658 isl_ctx *ctx;
1659 isl_space *pma_space;
1660
1661 pma_space = isl_pw_multi_aff_get_space(pma);
1662 if (!pw || !pma || !pma_space)
1663 goto error;
1664 if (isl_space_match(pw->dim, isl_dim_param, pma_space, isl_dim_param)) {
1665 isl_space_free(pma_space);
1666 return fn(pw, pma);
1667 }
1668 ctx = FN(PW,get_ctx)(pw);
1669 if (!isl_space_has_named_params(pw->dim) ||
1670 !isl_space_has_named_params(pma_space))
1671 isl_die(ctx, isl_error_invalid,
1672 "unaligned unnamed parameters", goto error);
1673 pw = FN(PW,align_params)(pw, pma_space);
1674 pma = isl_pw_multi_aff_align_params(pma, FN(PW,get_space)(pw));
1675 return fn(pw, pma);
1676 error:
1677 isl_space_free(pma_space);
1678 FN(PW,free)(pw);
1679 isl_pw_multi_aff_free(pma);
1680 return NULL;
1681 }
1682
1683 /* Compute the pullback of "pw" by the function represented by "ma".
1684 * In other words, plug in "ma" in "pw".
1685 */
1686 static __isl_give PW *FN(PW,pullback_multi_aff_aligned)(__isl_take PW *pw,
1687 __isl_take isl_multi_aff *ma)
1688 {
1689 int i;
1690 isl_space *space = NULL;
1691
1692 ma = isl_multi_aff_align_divs(ma);
1693 pw = FN(PW,cow)(pw);
1694 if (!pw || !ma)
1695 goto error;
1696
1697 space = isl_space_join(isl_multi_aff_get_space(ma),
1698 FN(PW,get_space)(pw));
1699
1700 for (i = 0; i < pw->n; ++i) {
1701 pw->p[i].set = isl_set_preimage_multi_aff(pw->p[i].set,
1702 isl_multi_aff_copy(ma));
1703 if (!pw->p[i].set)
1704 goto error;
1705 pw->p[i].FIELD = FN(EL,pullback_multi_aff)(pw->p[i].FIELD,
1706 isl_multi_aff_copy(ma));
1707 if (!pw->p[i].FIELD)
1708 goto error;
1709 }
1710
1711 pw = FN(PW,reset_space)(pw, space);
1712 isl_multi_aff_free(ma);
1713 return pw;
1714 error:
1715 isl_space_free(space);
1716 isl_multi_aff_free(ma);
1717 FN(PW,free)(pw);
1718 return NULL;
1719 }
1720
1721 __isl_give PW *FN(PW,pullback_multi_aff)(__isl_take PW *pw,
1722 __isl_take isl_multi_aff *ma)
1723 {
1724 return FN(PW,align_params_pw_multi_aff_and)(pw, ma,
1725 &FN(PW,pullback_multi_aff_aligned));
1726 }
1727
1728 /* Compute the pullback of "pw" by the function represented by "pma".
1729 * In other words, plug in "pma" in "pw".
1730 */
1731 static __isl_give PW *FN(PW,pullback_pw_multi_aff_aligned)(__isl_take PW *pw,
1732 __isl_take isl_pw_multi_aff *pma)
1733 {
1734 int i;
1735 PW *res;
1736
1737 if (!pma)
1738 goto error;
1739
1740 if (pma->n == 0) {
1741 isl_pw_multi_aff_free(pma);
1742 res = FN(PW,empty)(FN(PW,get_space)(pw));
1743 FN(PW,free)(pw);
1744 return res;
1745 }
1746
1747 res = FN(PW,pullback_multi_aff)(FN(PW,copy)(pw),
1748 isl_multi_aff_copy(pma->p[0].maff));
1749 res = FN(PW,intersect_domain)(res, isl_set_copy(pma->p[0].set));
1750
1751 for (i = 1; i < pma->n; ++i) {
1752 PW *res_i;
1753
1754 res_i = FN(PW,pullback_multi_aff)(FN(PW,copy)(pw),
1755 isl_multi_aff_copy(pma->p[i].maff));
1756 res_i = FN(PW,intersect_domain)(res_i,
1757 isl_set_copy(pma->p[i].set));
1758 res = FN(PW,add_disjoint)(res, res_i);
1759 }
1760
1761 isl_pw_multi_aff_free(pma);
1762 FN(PW,free)(pw);
1763 return res;
1764 error:
1765 isl_pw_multi_aff_free(pma);
1766 FN(PW,free)(pw);
1767 return NULL;
1768 }
1769
1770 __isl_give PW *FN(PW,pullback_pw_multi_aff)(__isl_take PW *pw,
1771 __isl_take isl_pw_multi_aff *pma)
1772 {
1773 return FN(PW,align_params_pw_pw_multi_aff_and)(pw, pma,
1774 &FN(PW,pullback_pw_multi_aff_aligned));
1775 }
1776 #endif
Integer set library