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isl_basic_map_compute_divs: recursively remove parameter equalities
[isl.git] / isl_pw_templ.c
blob39939740247bbf4587ec83d5282c53c383a35511
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].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
987 if (!pw->p[i].FIELD)
988 goto error;
989 if (type == isl_dim_out)
990 continue;
991 pw->p[i].set = isl_set_drop(pw->p[i].set, set_type, first, n);
992 if (!pw->p[i].set)
993 goto error;
994 }
995
996 return pw;
997 error:
998 FN(PW,free)(pw);
999 return NULL;
1000 }
1001
1002 /* This function is very similar to drop_dims.
1003 * The only difference is that the cells may still involve
1004 * the specified dimensions. They are removed using
1005 * isl_set_project_out instead of isl_set_drop.
1006 */
1007 __isl_give PW *FN(PW,project_out)(__isl_take PW *pw,
1008 enum isl_dim_type type, unsigned first, unsigned n)
1009 {
1010 int i;
1011 enum isl_dim_type set_type;
1012
1013 if (!pw)
1014 return NULL;
1015 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
1016 return pw;
1017
1018 set_type = type == isl_dim_in ? isl_dim_set : type;
1019
1020 pw = FN(PW,cow)(pw);
1021 if (!pw)
1022 return NULL;
1023 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
1024 if (!pw->dim)
1025 goto error;
1026 for (i = 0; i < pw->n; ++i) {
1027 pw->p[i].set = isl_set_project_out(pw->p[i].set,
1028 set_type, first, n);
1029 if (!pw->p[i].set)
1030 goto error;
1031 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
1032 if (!pw->p[i].FIELD)
1033 goto error;
1034 }
1035
1036 return pw;
1037 error:
1038 FN(PW,free)(pw);
1039 return NULL;
1040 }
1041
1042 /* Project the domain of pw onto its parameter space.
1043 */
1044 __isl_give PW *FN(PW,project_domain_on_params)(__isl_take PW *pw)
1045 {
1046 isl_space *space;
1047 unsigned n;
1048
1049 n = FN(PW,dim)(pw, isl_dim_in);
1050 pw = FN(PW,project_out)(pw, isl_dim_in, 0, n);
1051 space = FN(PW,get_domain_space)(pw);
1052 space = isl_space_params(space);
1053 pw = FN(PW,reset_domain_space)(pw, space);
1054 return pw;
1055 }
1056 #endif
1057
1058 #ifndef NO_INSERT_DIMS
1059 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
1060 unsigned first, unsigned n)
1061 {
1062 int i;
1063 enum isl_dim_type set_type;
1064
1065 if (!pw)
1066 return NULL;
1067 if (n == 0 && !isl_space_is_named_or_nested(pw->dim, type))
1068 return pw;
1069
1070 set_type = type == isl_dim_in ? isl_dim_set : type;
1071
1072 pw = FN(PW,cow)(pw);
1073 if (!pw)
1074 return NULL;
1075
1076 pw->dim = isl_space_insert_dims(pw->dim, type, first, n);
1077 if (!pw->dim)
1078 goto error;
1079
1080 for (i = 0; i < pw->n; ++i) {
1081 pw->p[i].set = isl_set_insert_dims(pw->p[i].set,
1082 set_type, first, n);
1083 if (!pw->p[i].set)
1084 goto error;
1085 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
1086 type, first, n);
1087 if (!pw->p[i].FIELD)
1088 goto error;
1089 }
1090
1091 return pw;
1092 error:
1093 FN(PW,free)(pw);
1094 return NULL;
1095 }
1096 #endif
1097
1098 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
1099 enum isl_dim_type type, unsigned pos, isl_int v)
1100 {
1101 int i;
1102
1103 if (!pw)
1104 return NULL;
1105
1106 if (type == isl_dim_in)
1107 type = isl_dim_set;
1108
1109 pw = FN(PW,cow)(pw);
1110 if (!pw)
1111 return NULL;
1112 for (i = 0; i < pw->n; ++i) {
1113 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
1114 if (!pw->p[i].set)
1115 goto error;
1116 }
1117
1118 return pw;
1119 error:
1120 FN(PW,free)(pw);
1121 return NULL;
1122 }
1123
1124 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
1125 {
1126 return pw ? isl_space_dim(pw->dim, type) : 0;
1127 }
1128
1129 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
1130 enum isl_dim_type type, unsigned first, unsigned n)
1131 {
1132 int i;
1133
1134 if (!pw)
1135 return NULL;
1136 if (n == 0)
1137 return pw;
1138
1139 if (type == isl_dim_in)
1140 type = isl_dim_set;
1141
1142 pw = FN(PW,cow)(pw);
1143 if (!pw)
1144 return NULL;
1145 if (!pw->dim)
1146 goto error;
1147 for (i = 0; i < pw->n; ++i) {
1148 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
1149 if (!pw->p[i].set)
1150 goto error;
1151 }
1152
1153 return pw;
1154 error:
1155 FN(PW,free)(pw);
1156 return NULL;
1157 }
1158
1159 #ifndef NO_OPT
1160 /* Compute the maximal value attained by the piecewise quasipolynomial
1161 * on its domain or zero if the domain is empty.
1162 * In the worst case, the domain is scanned completely,
1163 * so the domain is assumed to be bounded.
1164 */
1165 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
1166 {
1167 int i;
1168 isl_qpolynomial *opt;
1169
1170 if (!pw)
1171 return NULL;
1172
1173 if (pw->n == 0) {
1174 isl_space *dim = isl_space_copy(pw->dim);
1175 FN(PW,free)(pw);
1176 return isl_qpolynomial_zero_on_domain(isl_space_domain(dim));
1177 }
1178
1179 opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
1180 isl_set_copy(pw->p[0].set), max);
1181 for (i = 1; i < pw->n; ++i) {
1182 isl_qpolynomial *opt_i;
1183 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
1184 isl_set_copy(pw->p[i].set), max);
1185 if (max)
1186 opt = isl_qpolynomial_max_cst(opt, opt_i);
1187 else
1188 opt = isl_qpolynomial_min_cst(opt, opt_i);
1189 }
1190
1191 FN(PW,free)(pw);
1192 return opt;
1193 }
1194
1195 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
1196 {
1197 return FN(PW,opt)(pw, 1);
1198 }
1199
1200 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
1201 {
1202 return FN(PW,opt)(pw, 0);
1203 }
1204 #endif
1205
1206 __isl_give isl_space *FN(PW,get_space)(__isl_keep PW *pw)
1207 {
1208 return pw ? isl_space_copy(pw->dim) : NULL;
1209 }
1210
1211 __isl_give isl_space *FN(PW,get_domain_space)(__isl_keep PW *pw)
1212 {
1213 return pw ? isl_space_domain(isl_space_copy(pw->dim)) : NULL;
1214 }
1215
1216 #ifndef NO_RESET_DIM
1217 /* Reset the space of "pw". Since we don't know if the elements
1218 * represent the spaces themselves or their domains, we pass along
1219 * both when we call their reset_space_and_domain.
1220 */
1221 static __isl_give PW *FN(PW,reset_space_and_domain)(__isl_take PW *pw,
1222 __isl_take isl_space *space, __isl_take isl_space *domain)
1223 {
1224 int i;
1225
1226 pw = FN(PW,cow)(pw);
1227 if (!pw || !space || !domain)
1228 goto error;
1229
1230 for (i = 0; i < pw->n; ++i) {
1231 pw->p[i].set = isl_set_reset_space(pw->p[i].set,
1232 isl_space_copy(domain));
1233 if (!pw->p[i].set)
1234 goto error;
1235 pw->p[i].FIELD = FN(EL,reset_space_and_domain)(pw->p[i].FIELD,
1236 isl_space_copy(space), isl_space_copy(domain));
1237 if (!pw->p[i].FIELD)
1238 goto error;
1239 }
1240
1241 isl_space_free(domain);
1242
1243 isl_space_free(pw->dim);
1244 pw->dim = space;
1245
1246 return pw;
1247 error:
1248 isl_space_free(domain);
1249 isl_space_free(space);
1250 FN(PW,free)(pw);
1251 return NULL;
1252 }
1253
1254 __isl_give PW *FN(PW,reset_domain_space)(__isl_take PW *pw,
1255 __isl_take isl_space *domain)
1256 {
1257 isl_space *space;
1258
1259 space = isl_space_extend_domain_with_range(isl_space_copy(domain),
1260 FN(PW,get_space)(pw));
1261 return FN(PW,reset_space_and_domain)(pw, space, domain);
1262 }
1263
1264 __isl_give PW *FN(PW,reset_space)(__isl_take PW *pw, __isl_take isl_space *dim)
1265 {
1266 isl_space *domain;
1267
1268 domain = isl_space_domain(isl_space_copy(dim));
1269 return FN(PW,reset_space_and_domain)(pw, dim, domain);
1270 }
1271
1272 __isl_give PW *FN(PW,set_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type,
1273 __isl_take isl_id *id)
1274 {
1275 isl_space *space;
1276
1277 pw = FN(PW,cow)(pw);
1278 if (!pw)
1279 return isl_id_free(id);
1280
1281 space = FN(PW,get_space)(pw);
1282 space = isl_space_set_tuple_id(space, type, id);
1283
1284 return FN(PW,reset_space)(pw, space);
1285 }
1286
1287 __isl_give PW *FN(PW,set_dim_id)(__isl_take PW *pw,
1288 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
1289 {
1290 pw = FN(PW,cow)(pw);
1291 if (!pw)
1292 return isl_id_free(id);
1293 pw->dim = isl_space_set_dim_id(pw->dim, type, pos, id);
1294 return FN(PW,reset_space)(pw, isl_space_copy(pw->dim));
1295 }
1296 #endif
1297
1298 int FN(PW,has_equal_space)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1299 {
1300 if (!pw1 || !pw2)
1301 return -1;
1302
1303 return isl_space_is_equal(pw1->dim, pw2->dim);
1304 }
1305
1306 #ifndef NO_MORPH
1307 __isl_give PW *FN(PW,morph_domain)(__isl_take PW *pw,
1308 __isl_take isl_morph *morph)
1309 {
1310 int i;
1311 isl_ctx *ctx;
1312
1313 if (!pw || !morph)
1314 goto error;
1315
1316 ctx = isl_space_get_ctx(pw->dim);
1317 isl_assert(ctx, isl_space_is_domain_internal(morph->dom->dim, pw->dim),
1318 goto error);
1319
1320 pw = FN(PW,cow)(pw);
1321 if (!pw)
1322 goto error;
1323 pw->dim = isl_space_extend_domain_with_range(
1324 isl_space_copy(morph->ran->dim), pw->dim);
1325 if (!pw->dim)
1326 goto error;
1327
1328 for (i = 0; i < pw->n; ++i) {
1329 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
1330 if (!pw->p[i].set)
1331 goto error;
1332 pw->p[i].FIELD = FN(EL,morph_domain)(pw->p[i].FIELD,
1333 isl_morph_copy(morph));
1334 if (!pw->p[i].FIELD)
1335 goto error;
1336 }
1337
1338 isl_morph_free(morph);
1339
1340 return pw;
1341 error:
1342 FN(PW,free)(pw);
1343 isl_morph_free(morph);
1344 return NULL;
1345 }
1346 #endif
1347
1348 int FN(PW,n_piece)(__isl_keep PW *pw)
1349 {
1350 return pw ? pw->n : 0;
1351 }
1352
1353 int FN(PW,foreach_piece)(__isl_keep PW *pw,
1354 int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
1355 void *user)
1356 {
1357 int i;
1358
1359 if (!pw)
1360 return -1;
1361
1362 for (i = 0; i < pw->n; ++i)
1363 if (fn(isl_set_copy(pw->p[i].set),
1364 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
1365 return -1;
1366
1367 return 0;
1368 }
1369
1370 #ifndef NO_LIFT
1371 static int any_divs(__isl_keep isl_set *set)
1372 {
1373 int i;
1374
1375 if (!set)
1376 return -1;
1377
1378 for (i = 0; i < set->n; ++i)
1379 if (set->p[i]->n_div > 0)
1380 return 1;
1381
1382 return 0;
1383 }
1384
1385 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
1386 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1387 void *user), void *user)
1388 {
1389 int i;
1390
1391 if (!set || !el)
1392 goto error;
1393
1394 for (i = 0; i < set->n; ++i) {
1395 isl_set *lift;
1396 EL *copy;
1397
1398 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
1399 lift = isl_set_lift(lift);
1400
1401 copy = FN(EL,copy)(el);
1402 copy = FN(EL,lift)(copy, isl_set_get_space(lift));
1403
1404 if (fn(lift, copy, user) < 0)
1405 goto error;
1406 }
1407
1408 isl_set_free(set);
1409 FN(EL,free)(el);
1410
1411 return 0;
1412 error:
1413 isl_set_free(set);
1414 FN(EL,free)(el);
1415 return -1;
1416 }
1417
1418 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
1419 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1420 void *user), void *user)
1421 {
1422 int i;
1423
1424 if (!pw)
1425 return -1;
1426
1427 for (i = 0; i < pw->n; ++i) {
1428 isl_set *set;
1429 EL *el;
1430
1431 set = isl_set_copy(pw->p[i].set);
1432 el = FN(EL,copy)(pw->p[i].FIELD);
1433 if (!any_divs(set)) {
1434 if (fn(set, el, user) < 0)
1435 return -1;
1436 continue;
1437 }
1438 if (foreach_lifted_subset(set, el, fn, user) < 0)
1439 return -1;
1440 }
1441
1442 return 0;
1443 }
1444 #endif
1445
1446 #ifndef NO_MOVE_DIMS
1447 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
1448 enum isl_dim_type dst_type, unsigned dst_pos,
1449 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1450 {
1451 int i;
1452
1453 pw = FN(PW,cow)(pw);
1454 if (!pw)
1455 return NULL;
1456
1457 pw->dim = isl_space_move_dims(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
1458 if (!pw->dim)
1459 goto error;
1460
1461 for (i = 0; i < pw->n; ++i) {
1462 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
1463 dst_type, dst_pos, src_type, src_pos, n);
1464 if (!pw->p[i].FIELD)
1465 goto error;
1466 }
1467
1468 if (dst_type == isl_dim_in)
1469 dst_type = isl_dim_set;
1470 if (src_type == isl_dim_in)
1471 src_type = isl_dim_set;
1472
1473 for (i = 0; i < pw->n; ++i) {
1474 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
1475 dst_type, dst_pos,
1476 src_type, src_pos, n);
1477 if (!pw->p[i].set)
1478 goto error;
1479 }
1480
1481 return pw;
1482 error:
1483 FN(PW,free)(pw);
1484 return NULL;
1485 }
1486 #endif
1487
1488 __isl_give PW *FN(PW,mul_isl_int)(__isl_take PW *pw, isl_int v)
1489 {
1490 int i;
1491
1492 if (isl_int_is_one(v))
1493 return pw;
1494 if (pw && DEFAULT_IS_ZERO && isl_int_is_zero(v)) {
1495 PW *zero;
1496 isl_space *dim = FN(PW,get_space)(pw);
1497 #ifdef HAS_TYPE
1498 zero = FN(PW,ZERO)(dim, pw->type);
1499 #else
1500 zero = FN(PW,ZERO)(dim);
1501 #endif
1502 FN(PW,free)(pw);
1503 return zero;
1504 }
1505 pw = FN(PW,cow)(pw);
1506 if (!pw)
1507 return NULL;
1508 if (pw->n == 0)
1509 return pw;
1510
1511 #ifdef HAS_TYPE
1512 if (isl_int_is_neg(v))
1513 pw->type = isl_fold_type_negate(pw->type);
1514 #endif
1515 for (i = 0; i < pw->n; ++i) {
1516 pw->p[i].FIELD = FN(EL,scale)(pw->p[i].FIELD, v);
1517 if (!pw->p[i].FIELD)
1518 goto error;
1519 }
1520
1521 return pw;
1522 error:
1523 FN(PW,free)(pw);
1524 return NULL;
1525 }
1526
1527 __isl_give PW *FN(PW,scale)(__isl_take PW *pw, isl_int v)
1528 {
1529 return FN(PW,mul_isl_int)(pw, v);
1530 }
1531
1532 static int FN(PW,qsort_set_cmp)(const void *p1, const void *p2)
1533 {
1534 isl_set *set1 = *(isl_set * const *)p1;
1535 isl_set *set2 = *(isl_set * const *)p2;
1536
1537 return isl_set_plain_cmp(set1, set2);
1538 }
1539
1540 /* We normalize in place, but if anything goes wrong we need
1541 * to return NULL, so we need to make sure we don't change the
1542 * meaning of any possible other copies of map.
1543 */
1544 __isl_give PW *FN(PW,normalize)(__isl_take PW *pw)
1545 {
1546 int i, j;
1547 isl_set *set;
1548
1549 if (!pw)
1550 return NULL;
1551 for (i = 0; i < pw->n; ++i) {
1552 set = isl_set_normalize(isl_set_copy(pw->p[i].set));
1553 if (!set)
1554 return FN(PW,free)(pw);
1555 isl_set_free(pw->p[i].set);
1556 pw->p[i].set = set;
1557 }
1558 qsort(pw->p, pw->n, sizeof(pw->p[0]), &FN(PW,qsort_set_cmp));
1559 for (i = pw->n - 1; i >= 1; --i) {
1560 if (!isl_set_plain_is_equal(pw->p[i - 1].set, pw->p[i].set))
1561 continue;
1562 if (!FN(EL,plain_is_equal)(pw->p[i - 1].FIELD, pw->p[i].FIELD))
1563 continue;
1564 set = isl_set_union(isl_set_copy(pw->p[i - 1].set),
1565 isl_set_copy(pw->p[i].set));
1566 if (!set)
1567 return FN(PW,free)(pw);
1568 isl_set_free(pw->p[i].set);
1569 FN(EL,free)(pw->p[i].FIELD);
1570 isl_set_free(pw->p[i - 1].set);
1571 pw->p[i - 1].set = set;
1572 for (j = i + 1; j < pw->n; ++j)
1573 pw->p[j - 1] = pw->p[j];
1574 pw->n--;
1575 }
1576
1577 return pw;
1578 }
1579
1580 /* Is pw1 obviously equal to pw2?
1581 * That is, do they have obviously identical cells and obviously identical
1582 * elements on each cell?
1583 */
1584 int FN(PW,plain_is_equal)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1585 {
1586 int i;
1587 int equal;
1588
1589 if (!pw1 || !pw2)
1590 return -1;
1591
1592 if (pw1 == pw2)
1593 return 1;
1594 if (!isl_space_is_equal(pw1->dim, pw2->dim))
1595 return 0;
1596
1597 pw1 = FN(PW,copy)(pw1);
1598 pw2 = FN(PW,copy)(pw2);
1599 pw1 = FN(PW,normalize)(pw1);
1600 pw2 = FN(PW,normalize)(pw2);
1601 if (!pw1 || !pw2)
1602 goto error;
1603
1604 equal = pw1->n == pw2->n;
1605 for (i = 0; equal && i < pw1->n; ++i) {
1606 equal = isl_set_plain_is_equal(pw1->p[i].set, pw2->p[i].set);
1607 if (equal < 0)
1608 goto error;
1609 if (!equal)
1610 break;
1611 equal = FN(EL,plain_is_equal)(pw1->p[i].FIELD, pw2->p[i].FIELD);
1612 if (equal < 0)
1613 goto error;
1614 }
1615
1616 FN(PW,free)(pw1);
1617 FN(PW,free)(pw2);
1618 return equal;
1619 error:
1620 FN(PW,free)(pw1);
1621 FN(PW,free)(pw2);
1622 return -1;
1623 }
1624
1625 #ifndef NO_PULLBACK
1626 static __isl_give PW *FN(PW,align_params_pw_multi_aff_and)(__isl_take PW *pw,
1627 __isl_take isl_multi_aff *ma,
1628 __isl_give PW *(*fn)(__isl_take PW *pw, __isl_take isl_multi_aff *ma))
1629 {
1630 isl_ctx *ctx;
1631 isl_space *ma_space;
1632
1633 ma_space = isl_multi_aff_get_space(ma);
1634 if (!pw || !ma || !ma_space)
1635 goto error;
1636 if (isl_space_match(pw->dim, isl_dim_param, ma_space, isl_dim_param)) {
1637 isl_space_free(ma_space);
1638 return fn(pw, ma);
1639 }
1640 ctx = FN(PW,get_ctx)(pw);
1641 if (!isl_space_has_named_params(pw->dim) ||
1642 !isl_space_has_named_params(ma_space))
1643 isl_die(ctx, isl_error_invalid,
1644 "unaligned unnamed parameters", goto error);
1645 pw = FN(PW,align_params)(pw, ma_space);
1646 ma = isl_multi_aff_align_params(ma, FN(PW,get_space)(pw));
1647 return fn(pw, ma);
1648 error:
1649 isl_space_free(ma_space);
1650 FN(PW,free)(pw);
1651 isl_multi_aff_free(ma);
1652 return NULL;
1653 }
1654
1655 static __isl_give PW *FN(PW,align_params_pw_pw_multi_aff_and)(__isl_take PW *pw,
1656 __isl_take isl_pw_multi_aff *pma,
1657 __isl_give PW *(*fn)(__isl_take PW *pw,
1658 __isl_take isl_pw_multi_aff *ma))
1659 {
1660 isl_ctx *ctx;
1661 isl_space *pma_space;
1662
1663 pma_space = isl_pw_multi_aff_get_space(pma);
1664 if (!pw || !pma || !pma_space)
1665 goto error;
1666 if (isl_space_match(pw->dim, isl_dim_param, pma_space, isl_dim_param)) {
1667 isl_space_free(pma_space);
1668 return fn(pw, pma);
1669 }
1670 ctx = FN(PW,get_ctx)(pw);
1671 if (!isl_space_has_named_params(pw->dim) ||
1672 !isl_space_has_named_params(pma_space))
1673 isl_die(ctx, isl_error_invalid,
1674 "unaligned unnamed parameters", goto error);
1675 pw = FN(PW,align_params)(pw, pma_space);
1676 pma = isl_pw_multi_aff_align_params(pma, FN(PW,get_space)(pw));
1677 return fn(pw, pma);
1678 error:
1679 isl_space_free(pma_space);
1680 FN(PW,free)(pw);
1681 isl_pw_multi_aff_free(pma);
1682 return NULL;
1683 }
1684
1685 /* Compute the pullback of "pw" by the function represented by "ma".
1686 * In other words, plug in "ma" in "pw".
1687 */
1688 static __isl_give PW *FN(PW,pullback_multi_aff_aligned)(__isl_take PW *pw,
1689 __isl_take isl_multi_aff *ma)
1690 {
1691 int i;
1692 isl_space *space = NULL;
1693
1694 ma = isl_multi_aff_align_divs(ma);
1695 pw = FN(PW,cow)(pw);
1696 if (!pw || !ma)
1697 goto error;
1698
1699 space = isl_space_join(isl_multi_aff_get_space(ma),
1700 FN(PW,get_space)(pw));
1701
1702 for (i = 0; i < pw->n; ++i) {
1703 pw->p[i].set = isl_set_preimage_multi_aff(pw->p[i].set,
1704 isl_multi_aff_copy(ma));
1705 if (!pw->p[i].set)
1706 goto error;
1707 pw->p[i].FIELD = FN(EL,pullback_multi_aff)(pw->p[i].FIELD,
1708 isl_multi_aff_copy(ma));
1709 if (!pw->p[i].FIELD)
1710 goto error;
1711 }
1712
1713 pw = FN(PW,reset_space)(pw, space);
1714 isl_multi_aff_free(ma);
1715 return pw;
1716 error:
1717 isl_space_free(space);
1718 isl_multi_aff_free(ma);
1719 FN(PW,free)(pw);
1720 return NULL;
1721 }
1722
1723 __isl_give PW *FN(PW,pullback_multi_aff)(__isl_take PW *pw,
1724 __isl_take isl_multi_aff *ma)
1725 {
1726 return FN(PW,align_params_pw_multi_aff_and)(pw, ma,
1727 &FN(PW,pullback_multi_aff_aligned));
1728 }
1729
1730 /* Compute the pullback of "pw" by the function represented by "pma".
1731 * In other words, plug in "pma" in "pw".
1732 */
1733 static __isl_give PW *FN(PW,pullback_pw_multi_aff_aligned)(__isl_take PW *pw,
1734 __isl_take isl_pw_multi_aff *pma)
1735 {
1736 int i;
1737 PW *res;
1738
1739 if (!pma)
1740 goto error;
1741
1742 if (pma->n == 0) {
1743 isl_pw_multi_aff_free(pma);
1744 res = FN(PW,empty)(FN(PW,get_space)(pw));
1745 FN(PW,free)(pw);
1746 return res;
1747 }
1748
1749 res = FN(PW,pullback_multi_aff)(FN(PW,copy)(pw),
1750 isl_multi_aff_copy(pma->p[0].maff));
1751 res = FN(PW,intersect_domain)(res, isl_set_copy(pma->p[0].set));
1752
1753 for (i = 1; i < pma->n; ++i) {
1754 PW *res_i;
1755
1756 res_i = FN(PW,pullback_multi_aff)(FN(PW,copy)(pw),
1757 isl_multi_aff_copy(pma->p[i].maff));
1758 res_i = FN(PW,intersect_domain)(res_i,
1759 isl_set_copy(pma->p[i].set));
1760 res = FN(PW,add_disjoint)(res, res_i);
1761 }
1762
1763 isl_pw_multi_aff_free(pma);
1764 FN(PW,free)(pw);
1765 return res;
1766 error:
1767 isl_pw_multi_aff_free(pma);
1768 FN(PW,free)(pw);
1769 return NULL;
1770 }
1771
1772 __isl_give PW *FN(PW,pullback_pw_multi_aff)(__isl_take PW *pw,
1773 __isl_take isl_pw_multi_aff *pma)
1774 {
1775 return FN(PW,align_params_pw_pw_multi_aff_and)(pw, pma,
1776 &FN(PW,pullback_pw_multi_aff_aligned));
1777 }
1778 #endif
Integer set library