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add isl_aff_set_tuple_id
[isl.git] / isl_space.c
blob6827d940fb418b3c53d96664ca063fa498080dea
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
4 * Copyright 2014 Ecole Normale Superieure
5 *
6 * Use of this software is governed by the MIT license
7 *
8 * Written by Sven Verdoolaege, K.U.Leuven, Departement
9 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
10 * and INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
11 * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France
12 * and Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France
13 */
14
15 #include <stdlib.h>
16 #include <string.h>
17 #include <isl_space_private.h>
18 #include <isl_id_private.h>
19 #include <isl_reordering.h>
20
21 isl_ctx *isl_space_get_ctx(__isl_keep isl_space *dim)
22 {
23 return dim ? dim->ctx : NULL;
24 }
25
26 __isl_give isl_space *isl_space_alloc(isl_ctx *ctx,
27 unsigned nparam, unsigned n_in, unsigned n_out)
28 {
29 isl_space *dim;
30
31 dim = isl_alloc_type(ctx, struct isl_space);
32 if (!dim)
33 return NULL;
34
35 dim->ctx = ctx;
36 isl_ctx_ref(ctx);
37 dim->ref = 1;
38 dim->nparam = nparam;
39 dim->n_in = n_in;
40 dim->n_out = n_out;
41
42 dim->tuple_id[0] = NULL;
43 dim->tuple_id[1] = NULL;
44
45 dim->nested[0] = NULL;
46 dim->nested[1] = NULL;
47
48 dim->n_id = 0;
49 dim->ids = NULL;
50
51 return dim;
52 }
53
54 /* Mark the space as being that of a set, by setting the domain tuple
55 * to isl_id_none.
56 */
57 static __isl_give isl_space *mark_as_set(__isl_take isl_space *space)
58 {
59 space = isl_space_cow(space);
60 if (!space)
61 return NULL;
62 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
63 return space;
64 }
65
66 /* Is the space that of a set?
67 */
68 int isl_space_is_set(__isl_keep isl_space *space)
69 {
70 if (!space)
71 return -1;
72 if (space->n_in != 0 || space->nested[0])
73 return 0;
74 if (space->tuple_id[0] != &isl_id_none)
75 return 0;
76 return 1;
77 }
78
79 /* Is the given space that of a map?
80 */
81 int isl_space_is_map(__isl_keep isl_space *space)
82 {
83 if (!space)
84 return -1;
85 return space->tuple_id[0] != &isl_id_none &&
86 space->tuple_id[1] != &isl_id_none;
87 }
88
89 __isl_give isl_space *isl_space_set_alloc(isl_ctx *ctx,
90 unsigned nparam, unsigned dim)
91 {
92 isl_space *space;
93 space = isl_space_alloc(ctx, nparam, 0, dim);
94 space = mark_as_set(space);
95 return space;
96 }
97
98 /* Mark the space as being that of a parameter domain, by setting
99 * both tuples to isl_id_none.
100 */
101 static __isl_give isl_space *mark_as_params(isl_space *space)
102 {
103 if (!space)
104 return NULL;
105 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
106 space = isl_space_set_tuple_id(space, isl_dim_out, &isl_id_none);
107 return space;
108 }
109
110 /* Is the space that of a parameter domain?
111 */
112 int isl_space_is_params(__isl_keep isl_space *space)
113 {
114 if (!space)
115 return -1;
116 if (space->n_in != 0 || space->nested[0] ||
117 space->n_out != 0 || space->nested[1])
118 return 0;
119 if (space->tuple_id[0] != &isl_id_none)
120 return 0;
121 if (space->tuple_id[1] != &isl_id_none)
122 return 0;
123 return 1;
124 }
125
126 /* Create a space for a parameter domain.
127 */
128 __isl_give isl_space *isl_space_params_alloc(isl_ctx *ctx, unsigned nparam)
129 {
130 isl_space *space;
131 space = isl_space_alloc(ctx, nparam, 0, 0);
132 space = mark_as_params(space);
133 return space;
134 }
135
136 static unsigned global_pos(__isl_keep isl_space *dim,
137 enum isl_dim_type type, unsigned pos)
138 {
139 struct isl_ctx *ctx = dim->ctx;
140
141 switch (type) {
142 case isl_dim_param:
143 isl_assert(ctx, pos < dim->nparam,
144 return isl_space_dim(dim, isl_dim_all));
145 return pos;
146 case isl_dim_in:
147 isl_assert(ctx, pos < dim->n_in,
148 return isl_space_dim(dim, isl_dim_all));
149 return pos + dim->nparam;
150 case isl_dim_out:
151 isl_assert(ctx, pos < dim->n_out,
152 return isl_space_dim(dim, isl_dim_all));
153 return pos + dim->nparam + dim->n_in;
154 default:
155 isl_assert(ctx, 0, return isl_space_dim(dim, isl_dim_all));
156 }
157 return isl_space_dim(dim, isl_dim_all);
158 }
159
160 /* Extend length of ids array to the total number of dimensions.
161 */
162 static __isl_give isl_space *extend_ids(__isl_take isl_space *dim)
163 {
164 isl_id **ids;
165 int i;
166
167 if (isl_space_dim(dim, isl_dim_all) <= dim->n_id)
168 return dim;
169
170 if (!dim->ids) {
171 dim->ids = isl_calloc_array(dim->ctx,
172 isl_id *, isl_space_dim(dim, isl_dim_all));
173 if (!dim->ids)
174 goto error;
175 } else {
176 ids = isl_realloc_array(dim->ctx, dim->ids,
177 isl_id *, isl_space_dim(dim, isl_dim_all));
178 if (!ids)
179 goto error;
180 dim->ids = ids;
181 for (i = dim->n_id; i < isl_space_dim(dim, isl_dim_all); ++i)
182 dim->ids[i] = NULL;
183 }
184
185 dim->n_id = isl_space_dim(dim, isl_dim_all);
186
187 return dim;
188 error:
189 isl_space_free(dim);
190 return NULL;
191 }
192
193 static __isl_give isl_space *set_id(__isl_take isl_space *dim,
194 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
195 {
196 dim = isl_space_cow(dim);
197
198 if (!dim)
199 goto error;
200
201 pos = global_pos(dim, type, pos);
202 if (pos == isl_space_dim(dim, isl_dim_all))
203 goto error;
204
205 if (pos >= dim->n_id) {
206 if (!id)
207 return dim;
208 dim = extend_ids(dim);
209 if (!dim)
210 goto error;
211 }
212
213 dim->ids[pos] = id;
214
215 return dim;
216 error:
217 isl_id_free(id);
218 isl_space_free(dim);
219 return NULL;
220 }
221
222 static __isl_keep isl_id *get_id(__isl_keep isl_space *dim,
223 enum isl_dim_type type, unsigned pos)
224 {
225 if (!dim)
226 return NULL;
227
228 pos = global_pos(dim, type, pos);
229 if (pos == isl_space_dim(dim, isl_dim_all))
230 return NULL;
231 if (pos >= dim->n_id)
232 return NULL;
233 return dim->ids[pos];
234 }
235
236 static unsigned offset(__isl_keep isl_space *dim, enum isl_dim_type type)
237 {
238 switch (type) {
239 case isl_dim_param: return 0;
240 case isl_dim_in: return dim->nparam;
241 case isl_dim_out: return dim->nparam + dim->n_in;
242 default: return 0;
243 }
244 }
245
246 static unsigned n(__isl_keep isl_space *dim, enum isl_dim_type type)
247 {
248 switch (type) {
249 case isl_dim_param: return dim->nparam;
250 case isl_dim_in: return dim->n_in;
251 case isl_dim_out: return dim->n_out;
252 case isl_dim_all: return dim->nparam + dim->n_in + dim->n_out;
253 default: return 0;
254 }
255 }
256
257 unsigned isl_space_dim(__isl_keep isl_space *dim, enum isl_dim_type type)
258 {
259 if (!dim)
260 return 0;
261 return n(dim, type);
262 }
263
264 unsigned isl_space_offset(__isl_keep isl_space *dim, enum isl_dim_type type)
265 {
266 if (!dim)
267 return 0;
268 return offset(dim, type);
269 }
270
271 static __isl_give isl_space *copy_ids(__isl_take isl_space *dst,
272 enum isl_dim_type dst_type, unsigned offset, __isl_keep isl_space *src,
273 enum isl_dim_type src_type)
274 {
275 int i;
276 isl_id *id;
277
278 if (!dst)
279 return NULL;
280
281 for (i = 0; i < n(src, src_type); ++i) {
282 id = get_id(src, src_type, i);
283 if (!id)
284 continue;
285 dst = set_id(dst, dst_type, offset + i, isl_id_copy(id));
286 if (!dst)
287 return NULL;
288 }
289 return dst;
290 }
291
292 __isl_take isl_space *isl_space_dup(__isl_keep isl_space *dim)
293 {
294 isl_space *dup;
295 if (!dim)
296 return NULL;
297 dup = isl_space_alloc(dim->ctx, dim->nparam, dim->n_in, dim->n_out);
298 if (!dup)
299 return NULL;
300 if (dim->tuple_id[0] &&
301 !(dup->tuple_id[0] = isl_id_copy(dim->tuple_id[0])))
302 goto error;
303 if (dim->tuple_id[1] &&
304 !(dup->tuple_id[1] = isl_id_copy(dim->tuple_id[1])))
305 goto error;
306 if (dim->nested[0] && !(dup->nested[0] = isl_space_copy(dim->nested[0])))
307 goto error;
308 if (dim->nested[1] && !(dup->nested[1] = isl_space_copy(dim->nested[1])))
309 goto error;
310 if (!dim->ids)
311 return dup;
312 dup = copy_ids(dup, isl_dim_param, 0, dim, isl_dim_param);
313 dup = copy_ids(dup, isl_dim_in, 0, dim, isl_dim_in);
314 dup = copy_ids(dup, isl_dim_out, 0, dim, isl_dim_out);
315 return dup;
316 error:
317 isl_space_free(dup);
318 return NULL;
319 }
320
321 __isl_give isl_space *isl_space_cow(__isl_take isl_space *dim)
322 {
323 if (!dim)
324 return NULL;
325
326 if (dim->ref == 1)
327 return dim;
328 dim->ref--;
329 return isl_space_dup(dim);
330 }
331
332 __isl_give isl_space *isl_space_copy(__isl_keep isl_space *dim)
333 {
334 if (!dim)
335 return NULL;
336
337 dim->ref++;
338 return dim;
339 }
340
341 void *isl_space_free(__isl_take isl_space *dim)
342 {
343 int i;
344
345 if (!dim)
346 return NULL;
347
348 if (--dim->ref > 0)
349 return NULL;
350
351 isl_id_free(dim->tuple_id[0]);
352 isl_id_free(dim->tuple_id[1]);
353
354 isl_space_free(dim->nested[0]);
355 isl_space_free(dim->nested[1]);
356
357 for (i = 0; i < dim->n_id; ++i)
358 isl_id_free(dim->ids[i]);
359 free(dim->ids);
360 isl_ctx_deref(dim->ctx);
361
362 free(dim);
363
364 return NULL;
365 }
366
367 /* Check if "s" is a valid dimension or tuple name.
368 * We currently only forbid names that look like a number.
369 *
370 * s is assumed to be non-NULL.
371 */
372 static int name_ok(isl_ctx *ctx, const char *s)
373 {
374 char *p;
375 long dummy;
376
377 dummy = strtol(s, &p, 0);
378 if (p != s)
379 isl_die(ctx, isl_error_invalid, "name looks like a number",
380 return 0);
381
382 return 1;
383 }
384
385 /* Is it possible for the given dimension type to have a tuple id?
386 */
387 static int space_can_have_id(__isl_keep isl_space *space,
388 enum isl_dim_type type)
389 {
390 if (!space)
391 return 0;
392 if (isl_space_is_params(space))
393 isl_die(space->ctx, isl_error_invalid,
394 "parameter spaces don't have tuple ids", return 0);
395 if (isl_space_is_set(space) && type != isl_dim_set)
396 isl_die(space->ctx, isl_error_invalid,
397 "set spaces can only have a set id", return 0);
398 if (type != isl_dim_in && type != isl_dim_out)
399 isl_die(space->ctx, isl_error_invalid,
400 "only input, output and set tuples can have ids",
401 return 0);
402
403 return 1;
404 }
405
406 /* Does the tuple have an id?
407 */
408 int isl_space_has_tuple_id(__isl_keep isl_space *dim, enum isl_dim_type type)
409 {
410 if (!space_can_have_id(dim, type))
411 return -1;
412 return dim->tuple_id[type - isl_dim_in] != NULL;
413 }
414
415 __isl_give isl_id *isl_space_get_tuple_id(__isl_keep isl_space *dim,
416 enum isl_dim_type type)
417 {
418 int has_id;
419
420 if (!dim)
421 return NULL;
422 has_id = isl_space_has_tuple_id(dim, type);
423 if (has_id < 0)
424 return NULL;
425 if (!has_id)
426 isl_die(dim->ctx, isl_error_invalid,
427 "tuple has no id", return NULL);
428 return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
429 }
430
431 __isl_give isl_space *isl_space_set_tuple_id(__isl_take isl_space *dim,
432 enum isl_dim_type type, __isl_take isl_id *id)
433 {
434 dim = isl_space_cow(dim);
435 if (!dim || !id)
436 goto error;
437 if (type != isl_dim_in && type != isl_dim_out)
438 isl_die(dim->ctx, isl_error_invalid,
439 "only input, output and set tuples can have names",
440 goto error);
441
442 isl_id_free(dim->tuple_id[type - isl_dim_in]);
443 dim->tuple_id[type - isl_dim_in] = id;
444
445 return dim;
446 error:
447 isl_id_free(id);
448 isl_space_free(dim);
449 return NULL;
450 }
451
452 __isl_give isl_space *isl_space_reset_tuple_id(__isl_take isl_space *dim,
453 enum isl_dim_type type)
454 {
455 dim = isl_space_cow(dim);
456 if (!dim)
457 return NULL;
458 if (type != isl_dim_in && type != isl_dim_out)
459 isl_die(dim->ctx, isl_error_invalid,
460 "only input, output and set tuples can have names",
461 goto error);
462
463 isl_id_free(dim->tuple_id[type - isl_dim_in]);
464 dim->tuple_id[type - isl_dim_in] = NULL;
465
466 return dim;
467 error:
468 isl_space_free(dim);
469 return NULL;
470 }
471
472 /* Set the id of the given dimension of "space" to "id".
473 * If the dimension already has an id, then it is replaced.
474 * If the dimension is a parameter, then we need to change it
475 * in the nested spaces (if any) as well.
476 */
477 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *space,
478 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
479 {
480 space = isl_space_cow(space);
481 if (!space || !id)
482 goto error;
483
484 if (type == isl_dim_param) {
485 int i;
486
487 for (i = 0; i < 2; ++i) {
488 if (!space->nested[i])
489 continue;
490 space->nested[i] =
491 isl_space_set_dim_id(space->nested[i],
492 type, pos, isl_id_copy(id));
493 if (!space->nested[i])
494 goto error;
495 }
496 }
497
498 isl_id_free(get_id(space, type, pos));
499 return set_id(space, type, pos, id);
500 error:
501 isl_id_free(id);
502 isl_space_free(space);
503 return NULL;
504 }
505
506 /* Reset the id of the given dimension of "space".
507 * If the dimension already has an id, then it is removed.
508 * If the dimension is a parameter, then we need to reset it
509 * in the nested spaces (if any) as well.
510 */
511 __isl_give isl_space *isl_space_reset_dim_id(__isl_take isl_space *space,
512 enum isl_dim_type type, unsigned pos)
513 {
514 space = isl_space_cow(space);
515 if (!space)
516 goto error;
517
518 if (type == isl_dim_param) {
519 int i;
520
521 for (i = 0; i < 2; ++i) {
522 if (!space->nested[i])
523 continue;
524 space->nested[i] =
525 isl_space_reset_dim_id(space->nested[i],
526 type, pos);
527 if (!space->nested[i])
528 goto error;
529 }
530 }
531
532 isl_id_free(get_id(space, type, pos));
533 return set_id(space, type, pos, NULL);
534 error:
535 isl_space_free(space);
536 return NULL;
537 }
538
539 int isl_space_has_dim_id(__isl_keep isl_space *dim,
540 enum isl_dim_type type, unsigned pos)
541 {
542 if (!dim)
543 return -1;
544 return get_id(dim, type, pos) != NULL;
545 }
546
547 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
548 enum isl_dim_type type, unsigned pos)
549 {
550 if (!dim)
551 return NULL;
552 if (!get_id(dim, type, pos))
553 isl_die(dim->ctx, isl_error_invalid,
554 "dim has no id", return NULL);
555 return isl_id_copy(get_id(dim, type, pos));
556 }
557
558 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
559 enum isl_dim_type type, const char *s)
560 {
561 isl_id *id;
562
563 if (!dim)
564 return NULL;
565
566 if (!s)
567 return isl_space_reset_tuple_id(dim, type);
568
569 if (!name_ok(dim->ctx, s))
570 goto error;
571
572 id = isl_id_alloc(dim->ctx, s, NULL);
573 return isl_space_set_tuple_id(dim, type, id);
574 error:
575 isl_space_free(dim);
576 return NULL;
577 }
578
579 /* Does the tuple have a name?
580 */
581 int isl_space_has_tuple_name(__isl_keep isl_space *space,
582 enum isl_dim_type type)
583 {
584 isl_id *id;
585
586 if (!space_can_have_id(space, type))
587 return -1;
588 id = space->tuple_id[type - isl_dim_in];
589 return id && id->name;
590 }
591
592 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
593 enum isl_dim_type type)
594 {
595 isl_id *id;
596 if (!dim)
597 return NULL;
598 if (type != isl_dim_in && type != isl_dim_out)
599 return NULL;
600 id = dim->tuple_id[type - isl_dim_in];
601 return id ? id->name : NULL;
602 }
603
604 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
605 enum isl_dim_type type, unsigned pos,
606 const char *s)
607 {
608 isl_id *id;
609
610 if (!dim)
611 return NULL;
612 if (!s)
613 return isl_space_reset_dim_id(dim, type, pos);
614 if (!name_ok(dim->ctx, s))
615 goto error;
616 id = isl_id_alloc(dim->ctx, s, NULL);
617 return isl_space_set_dim_id(dim, type, pos, id);
618 error:
619 isl_space_free(dim);
620 return NULL;
621 }
622
623 /* Does the given dimension have a name?
624 */
625 int isl_space_has_dim_name(__isl_keep isl_space *space,
626 enum isl_dim_type type, unsigned pos)
627 {
628 isl_id *id;
629
630 if (!space)
631 return -1;
632 id = get_id(space, type, pos);
633 return id && id->name;
634 }
635
636 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
637 enum isl_dim_type type, unsigned pos)
638 {
639 isl_id *id = get_id(dim, type, pos);
640 return id ? id->name : NULL;
641 }
642
643 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
644 __isl_keep isl_id *id)
645 {
646 int i;
647 int offset;
648 int n;
649
650 if (!dim || !id)
651 return -1;
652
653 offset = isl_space_offset(dim, type);
654 n = isl_space_dim(dim, type);
655 for (i = 0; i < n && offset + i < dim->n_id; ++i)
656 if (dim->ids[offset + i] == id)
657 return i;
658
659 return -1;
660 }
661
662 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
663 enum isl_dim_type type, const char *name)
664 {
665 int i;
666 int offset;
667 int n;
668
669 if (!space || !name)
670 return -1;
671
672 offset = isl_space_offset(space, type);
673 n = isl_space_dim(space, type);
674 for (i = 0; i < n && offset + i < space->n_id; ++i)
675 if (space->ids[offset + i]->name &&
676 !strcmp(space->ids[offset + i]->name, name))
677 return i;
678
679 return -1;
680 }
681
682 /* Reset the user pointer on all identifiers of parameters and tuples
683 * of "space".
684 */
685 __isl_give isl_space *isl_space_reset_user(__isl_take isl_space *space)
686 {
687 int i;
688 isl_ctx *ctx;
689 isl_id *id;
690 const char *name;
691
692 if (!space)
693 return NULL;
694
695 ctx = isl_space_get_ctx(space);
696
697 for (i = 0; i < space->nparam && i < space->n_id; ++i) {
698 if (!isl_id_get_user(space->ids[i]))
699 continue;
700 space = isl_space_cow(space);
701 if (!space)
702 return NULL;
703 name = isl_id_get_name(space->ids[i]);
704 id = isl_id_alloc(ctx, name, NULL);
705 isl_id_free(space->ids[i]);
706 space->ids[i] = id;
707 if (!id)
708 return isl_space_free(space);
709 }
710
711 for (i = 0; i < 2; ++i) {
712 if (!space->tuple_id[i])
713 continue;
714 if (!isl_id_get_user(space->tuple_id[i]))
715 continue;
716 space = isl_space_cow(space);
717 if (!space)
718 return NULL;
719 name = isl_id_get_name(space->tuple_id[i]);
720 id = isl_id_alloc(ctx, name, NULL);
721 isl_id_free(space->tuple_id[i]);
722 space->tuple_id[i] = id;
723 if (!id)
724 return isl_space_free(space);
725 }
726
727 for (i = 0; i < 2; ++i) {
728 if (!space->nested[i])
729 continue;
730 space = isl_space_cow(space);
731 if (!space)
732 return NULL;
733 space->nested[i] = isl_space_reset_user(space->nested[i]);
734 if (!space->nested[i])
735 return isl_space_free(space);
736 }
737
738 return space;
739 }
740
741 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
742 enum isl_dim_type type)
743 {
744 if (!dim)
745 return NULL;
746 if (type == isl_dim_in)
747 return dim->tuple_id[0];
748 if (type == isl_dim_out)
749 return dim->tuple_id[1];
750 return NULL;
751 }
752
753 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
754 enum isl_dim_type type)
755 {
756 if (!dim)
757 return NULL;
758 if (type == isl_dim_in)
759 return dim->nested[0];
760 if (type == isl_dim_out)
761 return dim->nested[1];
762 return NULL;
763 }
764
765 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
766 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
767 {
768 isl_id *id1, *id2;
769 isl_space *nested1, *nested2;
770
771 if (!dim1 || !dim2)
772 return -1;
773
774 if (dim1 == dim2 && dim1_type == dim2_type)
775 return 1;
776
777 if (n(dim1, dim1_type) != n(dim2, dim2_type))
778 return 0;
779 id1 = tuple_id(dim1, dim1_type);
780 id2 = tuple_id(dim2, dim2_type);
781 if (!id1 ^ !id2)
782 return 0;
783 if (id1 && id1 != id2)
784 return 0;
785 nested1 = nested(dim1, dim1_type);
786 nested2 = nested(dim2, dim2_type);
787 if (!nested1 ^ !nested2)
788 return 0;
789 if (nested1 && !isl_space_is_equal(nested1, nested2))
790 return 0;
791 return 1;
792 }
793
794 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
795 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
796 {
797 int i;
798
799 if (dim1 == dim2 && dim1_type == dim2_type)
800 return 1;
801
802 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
803 return 0;
804
805 if (!dim1->ids && !dim2->ids)
806 return 1;
807
808 for (i = 0; i < n(dim1, dim1_type); ++i) {
809 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
810 return 0;
811 }
812 return 1;
813 }
814
815 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
816 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
817 {
818 if (!dim1 || !dim2)
819 return -1;
820
821 return match(dim1, dim1_type, dim2, dim2_type);
822 }
823
824 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
825 unsigned first, unsigned n, __isl_keep isl_id **ids)
826 {
827 int i;
828
829 for (i = 0; i < n ; ++i)
830 ids[i] = get_id(dim, type, first + i);
831 }
832
833 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
834 unsigned nparam, unsigned n_in, unsigned n_out)
835 {
836 isl_id **ids = NULL;
837
838 if (!dim)
839 return NULL;
840 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
841 return dim;
842
843 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
844 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
845 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
846
847 dim = isl_space_cow(dim);
848 if (!dim)
849 goto error;
850
851 if (dim->ids) {
852 ids = isl_calloc_array(dim->ctx, isl_id *,
853 nparam + n_in + n_out);
854 if (!ids)
855 goto error;
856 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
857 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
858 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
859 free(dim->ids);
860 dim->ids = ids;
861 dim->n_id = nparam + n_in + n_out;
862 }
863 dim->nparam = nparam;
864 dim->n_in = n_in;
865 dim->n_out = n_out;
866
867 return dim;
868 error:
869 free(ids);
870 isl_space_free(dim);
871 return NULL;
872 }
873
874 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
875 enum isl_dim_type type, unsigned n)
876 {
877 if (!dim)
878 return NULL;
879 dim = isl_space_reset(dim, type);
880 switch (type) {
881 case isl_dim_param:
882 dim = isl_space_extend(dim,
883 dim->nparam + n, dim->n_in, dim->n_out);
884 if (dim && dim->nested[0] &&
885 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
886 isl_dim_param, n)))
887 goto error;
888 if (dim && dim->nested[1] &&
889 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
890 isl_dim_param, n)))
891 goto error;
892 return dim;
893 case isl_dim_in:
894 return isl_space_extend(dim,
895 dim->nparam, dim->n_in + n, dim->n_out);
896 case isl_dim_out:
897 return isl_space_extend(dim,
898 dim->nparam, dim->n_in, dim->n_out + n);
899 default:
900 isl_die(dim->ctx, isl_error_invalid,
901 "cannot add dimensions of specified type", goto error);
902 }
903 error:
904 isl_space_free(dim);
905 return NULL;
906 }
907
908 static int valid_dim_type(enum isl_dim_type type)
909 {
910 switch (type) {
911 case isl_dim_param:
912 case isl_dim_in:
913 case isl_dim_out:
914 return 1;
915 default:
916 return 0;
917 }
918 }
919
920 /* Insert "n" dimensions of type "type" at position "pos".
921 * If we are inserting parameters, then they are also inserted in
922 * any nested spaces.
923 */
924 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
925 enum isl_dim_type type, unsigned pos, unsigned n)
926 {
927 isl_id **ids = NULL;
928
929 if (!dim)
930 return NULL;
931 if (n == 0)
932 return isl_space_reset(dim, type);
933
934 if (!valid_dim_type(type))
935 isl_die(dim->ctx, isl_error_invalid,
936 "cannot insert dimensions of specified type",
937 goto error);
938
939 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
940
941 dim = isl_space_cow(dim);
942 if (!dim)
943 return NULL;
944
945 if (dim->ids) {
946 enum isl_dim_type t, o = isl_dim_param;
947 int off;
948 int s[3];
949 ids = isl_calloc_array(dim->ctx, isl_id *,
950 dim->nparam + dim->n_in + dim->n_out + n);
951 if (!ids)
952 goto error;
953 off = 0;
954 s[isl_dim_param - o] = dim->nparam;
955 s[isl_dim_in - o] = dim->n_in;
956 s[isl_dim_out - o] = dim->n_out;
957 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
958 if (t != type) {
959 get_ids(dim, t, 0, s[t - o], ids + off);
960 off += s[t - o];
961 } else {
962 get_ids(dim, t, 0, pos, ids + off);
963 off += pos + n;
964 get_ids(dim, t, pos, s[t - o] - pos, ids + off);
965 off += s[t - o] - pos;
966 }
967 }
968 free(dim->ids);
969 dim->ids = ids;
970 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
971 }
972 switch (type) {
973 case isl_dim_param: dim->nparam += n; break;
974 case isl_dim_in: dim->n_in += n; break;
975 case isl_dim_out: dim->n_out += n; break;
976 default: ;
977 }
978 dim = isl_space_reset(dim, type);
979
980 if (type == isl_dim_param) {
981 if (dim && dim->nested[0] &&
982 !(dim->nested[0] = isl_space_insert_dims(dim->nested[0],
983 isl_dim_param, pos, n)))
984 goto error;
985 if (dim && dim->nested[1] &&
986 !(dim->nested[1] = isl_space_insert_dims(dim->nested[1],
987 isl_dim_param, pos, n)))
988 goto error;
989 }
990
991 return dim;
992 error:
993 isl_space_free(dim);
994 return NULL;
995 }
996
997 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
998 enum isl_dim_type dst_type, unsigned dst_pos,
999 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1000 {
1001 int i;
1002
1003 if (!dim)
1004 return NULL;
1005 if (n == 0) {
1006 dim = isl_space_reset(dim, src_type);
1007 return isl_space_reset(dim, dst_type);
1008 }
1009
1010 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
1011 goto error);
1012
1013 if (dst_type == src_type && dst_pos == src_pos)
1014 return dim;
1015
1016 isl_assert(dim->ctx, dst_type != src_type, goto error);
1017
1018 dim = isl_space_reset(dim, src_type);
1019 dim = isl_space_reset(dim, dst_type);
1020
1021 dim = isl_space_cow(dim);
1022 if (!dim)
1023 return NULL;
1024
1025 if (dim->ids) {
1026 isl_id **ids;
1027 enum isl_dim_type t, o = isl_dim_param;
1028 int off;
1029 int s[3];
1030 ids = isl_calloc_array(dim->ctx, isl_id *,
1031 dim->nparam + dim->n_in + dim->n_out);
1032 if (!ids)
1033 goto error;
1034 off = 0;
1035 s[isl_dim_param - o] = dim->nparam;
1036 s[isl_dim_in - o] = dim->n_in;
1037 s[isl_dim_out - o] = dim->n_out;
1038 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
1039 if (t == dst_type) {
1040 get_ids(dim, t, 0, dst_pos, ids + off);
1041 off += dst_pos;
1042 get_ids(dim, src_type, src_pos, n, ids + off);
1043 off += n;
1044 get_ids(dim, t, dst_pos, s[t - o] - dst_pos,
1045 ids + off);
1046 off += s[t - o] - dst_pos;
1047 } else if (t == src_type) {
1048 get_ids(dim, t, 0, src_pos, ids + off);
1049 off += src_pos;
1050 get_ids(dim, t, src_pos + n,
1051 s[t - o] - src_pos - n, ids + off);
1052 off += s[t - o] - src_pos - n;
1053 } else {
1054 get_ids(dim, t, 0, s[t - o], ids + off);
1055 off += s[t - o];
1056 }
1057 }
1058 free(dim->ids);
1059 dim->ids = ids;
1060 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
1061 }
1062
1063 switch (dst_type) {
1064 case isl_dim_param: dim->nparam += n; break;
1065 case isl_dim_in: dim->n_in += n; break;
1066 case isl_dim_out: dim->n_out += n; break;
1067 default: ;
1068 }
1069
1070 switch (src_type) {
1071 case isl_dim_param: dim->nparam -= n; break;
1072 case isl_dim_in: dim->n_in -= n; break;
1073 case isl_dim_out: dim->n_out -= n; break;
1074 default: ;
1075 }
1076
1077 if (dst_type != isl_dim_param && src_type != isl_dim_param)
1078 return dim;
1079
1080 for (i = 0; i < 2; ++i) {
1081 if (!dim->nested[i])
1082 continue;
1083 dim->nested[i] = isl_space_replace(dim->nested[i],
1084 isl_dim_param, dim);
1085 if (!dim->nested[i])
1086 goto error;
1087 }
1088
1089 return dim;
1090 error:
1091 isl_space_free(dim);
1092 return NULL;
1093 }
1094
1095 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
1096 __isl_take isl_space *right)
1097 {
1098 isl_space *dim;
1099
1100 if (!left || !right)
1101 goto error;
1102
1103 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1104 goto error);
1105 isl_assert(left->ctx,
1106 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
1107 goto error);
1108
1109 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
1110 if (!dim)
1111 goto error;
1112
1113 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
1114 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
1115 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
1116
1117 if (dim && left->tuple_id[0] &&
1118 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
1119 goto error;
1120 if (dim && right->tuple_id[1] &&
1121 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
1122 goto error;
1123 if (dim && left->nested[0] &&
1124 !(dim->nested[0] = isl_space_copy(left->nested[0])))
1125 goto error;
1126 if (dim && right->nested[1] &&
1127 !(dim->nested[1] = isl_space_copy(right->nested[1])))
1128 goto error;
1129
1130 isl_space_free(left);
1131 isl_space_free(right);
1132
1133 return dim;
1134 error:
1135 isl_space_free(left);
1136 isl_space_free(right);
1137 return NULL;
1138 }
1139
1140 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
1141 __isl_take isl_space *right)
1142 {
1143 isl_space *dom1, *dom2, *nest1, *nest2;
1144
1145 if (!left || !right)
1146 goto error;
1147
1148 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1149 goto error);
1150
1151 dom1 = isl_space_domain(isl_space_copy(left));
1152 dom2 = isl_space_domain(isl_space_copy(right));
1153 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1154
1155 dom1 = isl_space_range(left);
1156 dom2 = isl_space_range(right);
1157 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1158
1159 return isl_space_join(isl_space_reverse(nest1), nest2);
1160 error:
1161 isl_space_free(left);
1162 isl_space_free(right);
1163 return NULL;
1164 }
1165
1166 /* Given two spaces { A -> C } and { B -> C }, construct the space
1167 * { [A -> B] -> C }
1168 */
1169 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1170 __isl_take isl_space *right)
1171 {
1172 isl_space *ran, *dom1, *dom2, *nest;
1173
1174 if (!left || !right)
1175 goto error;
1176
1177 if (!match(left, isl_dim_param, right, isl_dim_param))
1178 isl_die(left->ctx, isl_error_invalid,
1179 "parameters need to match", goto error);
1180 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
1181 isl_die(left->ctx, isl_error_invalid,
1182 "ranges need to match", goto error);
1183
1184 ran = isl_space_range(isl_space_copy(left));
1185
1186 dom1 = isl_space_domain(left);
1187 dom2 = isl_space_domain(right);
1188 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1189
1190 return isl_space_join(isl_space_reverse(nest), ran);
1191 error:
1192 isl_space_free(left);
1193 isl_space_free(right);
1194 return NULL;
1195 }
1196
1197 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1198 __isl_take isl_space *right)
1199 {
1200 isl_space *dom, *ran1, *ran2, *nest;
1201
1202 if (!left || !right)
1203 goto error;
1204
1205 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1206 goto error);
1207 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1208 isl_die(left->ctx, isl_error_invalid,
1209 "domains need to match", goto error);
1210
1211 dom = isl_space_domain(isl_space_copy(left));
1212
1213 ran1 = isl_space_range(left);
1214 ran2 = isl_space_range(right);
1215 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1216
1217 return isl_space_join(isl_space_reverse(dom), nest);
1218 error:
1219 isl_space_free(left);
1220 isl_space_free(right);
1221 return NULL;
1222 }
1223
1224 /* Given a space of the form A -> [B -> C], return the space A -> B.
1225 */
1226 __isl_give isl_space *isl_space_range_factor_domain(
1227 __isl_take isl_space *space)
1228 {
1229 isl_space *nested;
1230 isl_space *domain;
1231
1232 if (!space)
1233 return NULL;
1234 if (!isl_space_range_is_wrapping(space))
1235 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1236 "range not a product", return isl_space_free(space));
1237
1238 nested = space->nested[1];
1239 domain = isl_space_copy(space);
1240 domain = isl_space_drop_dims(space, isl_dim_out,
1241 nested->n_in, nested->n_out);
1242 if (!domain)
1243 return isl_space_free(space);
1244 if (nested->tuple_id[0]) {
1245 domain->tuple_id[1] = isl_id_copy(nested->tuple_id[0]);
1246 if (!domain->tuple_id[1])
1247 goto error;
1248 }
1249 if (nested->nested[0]) {
1250 domain->nested[1] = isl_space_copy(nested->nested[0]);
1251 if (!domain->nested[1])
1252 goto error;
1253 }
1254
1255 isl_space_free(space);
1256 return domain;
1257 error:
1258 isl_space_free(space);
1259 isl_space_free(domain);
1260 return NULL;
1261 }
1262
1263 /* Given a space of the form A -> [B -> C], return the space A -> C.
1264 */
1265 __isl_give isl_space *isl_space_range_factor_range(
1266 __isl_take isl_space *space)
1267 {
1268 isl_space *nested;
1269 isl_space *range;
1270
1271 if (!space)
1272 return NULL;
1273 if (!isl_space_range_is_wrapping(space))
1274 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1275 "range not a product", return isl_space_free(space));
1276
1277 nested = space->nested[1];
1278 range = isl_space_copy(space);
1279 range = isl_space_drop_dims(space, isl_dim_out, 0, nested->n_in);
1280 if (!range)
1281 return isl_space_free(space);
1282 if (nested->tuple_id[1]) {
1283 range->tuple_id[1] = isl_id_copy(nested->tuple_id[1]);
1284 if (!range->tuple_id[1])
1285 goto error;
1286 }
1287 if (nested->nested[1]) {
1288 range->nested[1] = isl_space_copy(nested->nested[1]);
1289 if (!range->nested[1])
1290 goto error;
1291 }
1292
1293 isl_space_free(space);
1294 return range;
1295 error:
1296 isl_space_free(space);
1297 isl_space_free(range);
1298 return NULL;
1299 }
1300
1301 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1302 {
1303 isl_ctx *ctx;
1304 isl_id **ids = NULL;
1305
1306 if (!dim)
1307 return NULL;
1308 ctx = isl_space_get_ctx(dim);
1309 if (!isl_space_is_set(dim))
1310 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1311 dim = isl_space_cow(dim);
1312 if (!dim)
1313 return NULL;
1314 if (dim->ids) {
1315 ids = isl_calloc_array(dim->ctx, isl_id *,
1316 dim->nparam + dim->n_out + dim->n_out);
1317 if (!ids)
1318 goto error;
1319 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1320 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1321 }
1322 dim->n_in = dim->n_out;
1323 if (ids) {
1324 free(dim->ids);
1325 dim->ids = ids;
1326 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1327 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1328 }
1329 isl_id_free(dim->tuple_id[0]);
1330 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1331 isl_space_free(dim->nested[0]);
1332 dim->nested[0] = isl_space_copy(dim->nested[1]);
1333 return dim;
1334 error:
1335 isl_space_free(dim);
1336 return NULL;
1337 }
1338
1339 __isl_give isl_space *isl_space_map_from_domain_and_range(
1340 __isl_take isl_space *domain, __isl_take isl_space *range)
1341 {
1342 if (!domain || !range)
1343 goto error;
1344 if (!isl_space_is_set(domain))
1345 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1346 "domain is not a set space", goto error);
1347 if (!isl_space_is_set(range))
1348 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1349 "range is not a set space", goto error);
1350 return isl_space_join(isl_space_reverse(domain), range);
1351 error:
1352 isl_space_free(domain);
1353 isl_space_free(range);
1354 return NULL;
1355 }
1356
1357 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1358 enum isl_dim_type type,
1359 unsigned first, unsigned n, __isl_take isl_id **ids)
1360 {
1361 int i;
1362
1363 for (i = 0; i < n ; ++i)
1364 dim = set_id(dim, type, first + i, ids[i]);
1365
1366 return dim;
1367 }
1368
1369 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1370 {
1371 unsigned t;
1372 isl_space *nested;
1373 isl_id **ids = NULL;
1374 isl_id *id;
1375
1376 if (!dim)
1377 return NULL;
1378 if (match(dim, isl_dim_in, dim, isl_dim_out))
1379 return dim;
1380
1381 dim = isl_space_cow(dim);
1382 if (!dim)
1383 return NULL;
1384
1385 id = dim->tuple_id[0];
1386 dim->tuple_id[0] = dim->tuple_id[1];
1387 dim->tuple_id[1] = id;
1388
1389 nested = dim->nested[0];
1390 dim->nested[0] = dim->nested[1];
1391 dim->nested[1] = nested;
1392
1393 if (dim->ids) {
1394 int n_id = dim->n_in + dim->n_out;
1395 ids = isl_alloc_array(dim->ctx, isl_id *, n_id);
1396 if (n_id && !ids)
1397 goto error;
1398 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1399 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1400 }
1401
1402 t = dim->n_in;
1403 dim->n_in = dim->n_out;
1404 dim->n_out = t;
1405
1406 if (dim->ids) {
1407 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1408 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1409 free(ids);
1410 }
1411
1412 return dim;
1413 error:
1414 free(ids);
1415 isl_space_free(dim);
1416 return NULL;
1417 }
1418
1419 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1420 enum isl_dim_type type, unsigned first, unsigned num)
1421 {
1422 int i;
1423
1424 if (!dim)
1425 return NULL;
1426
1427 if (num == 0)
1428 return isl_space_reset(dim, type);
1429
1430 if (!valid_dim_type(type))
1431 isl_die(dim->ctx, isl_error_invalid,
1432 "cannot drop dimensions of specified type", goto error);
1433
1434 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1435 dim = isl_space_cow(dim);
1436 if (!dim)
1437 goto error;
1438 if (dim->ids) {
1439 dim = extend_ids(dim);
1440 if (!dim)
1441 goto error;
1442 for (i = 0; i < num; ++i)
1443 isl_id_free(get_id(dim, type, first + i));
1444 for (i = first+num; i < n(dim, type); ++i)
1445 set_id(dim, type, i - num, get_id(dim, type, i));
1446 switch (type) {
1447 case isl_dim_param:
1448 get_ids(dim, isl_dim_in, 0, dim->n_in,
1449 dim->ids + offset(dim, isl_dim_in) - num);
1450 case isl_dim_in:
1451 get_ids(dim, isl_dim_out, 0, dim->n_out,
1452 dim->ids + offset(dim, isl_dim_out) - num);
1453 default:
1454 ;
1455 }
1456 dim->n_id -= num;
1457 }
1458 switch (type) {
1459 case isl_dim_param: dim->nparam -= num; break;
1460 case isl_dim_in: dim->n_in -= num; break;
1461 case isl_dim_out: dim->n_out -= num; break;
1462 default: ;
1463 }
1464 dim = isl_space_reset(dim, type);
1465 if (type == isl_dim_param) {
1466 if (dim && dim->nested[0] &&
1467 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1468 isl_dim_param, first, num)))
1469 goto error;
1470 if (dim && dim->nested[1] &&
1471 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1472 isl_dim_param, first, num)))
1473 goto error;
1474 }
1475 return dim;
1476 error:
1477 isl_space_free(dim);
1478 return NULL;
1479 }
1480
1481 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1482 unsigned first, unsigned n)
1483 {
1484 if (!dim)
1485 return NULL;
1486 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1487 }
1488
1489 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1490 unsigned first, unsigned n)
1491 {
1492 if (!dim)
1493 return NULL;
1494 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1495 }
1496
1497 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1498 {
1499 if (!dim)
1500 return NULL;
1501 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1502 dim = isl_space_reverse(dim);
1503 dim = mark_as_set(dim);
1504 return dim;
1505 }
1506
1507 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1508 {
1509 if (!dim)
1510 return NULL;
1511 if (!isl_space_is_set(dim))
1512 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1513 "not a set space", goto error);
1514 dim = isl_space_reverse(dim);
1515 dim = isl_space_reset(dim, isl_dim_out);
1516 return dim;
1517 error:
1518 isl_space_free(dim);
1519 return NULL;
1520 }
1521
1522 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1523 {
1524 if (!dim)
1525 return NULL;
1526 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1527 dim = mark_as_set(dim);
1528 return dim;
1529 }
1530
1531 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1532 {
1533 if (!dim)
1534 return NULL;
1535 if (!isl_space_is_set(dim))
1536 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1537 "not a set space", goto error);
1538 return isl_space_reset(dim, isl_dim_in);
1539 error:
1540 isl_space_free(dim);
1541 return NULL;
1542 }
1543
1544 /* Given a map space A -> B, return the map space [A -> B] -> A.
1545 */
1546 __isl_give isl_space *isl_space_domain_map(__isl_take isl_space *space)
1547 {
1548 isl_space *domain;
1549
1550 domain = isl_space_from_range(isl_space_domain(isl_space_copy(space)));
1551 space = isl_space_from_domain(isl_space_wrap(space));
1552 space = isl_space_join(space, domain);
1553
1554 return space;
1555 }
1556
1557 /* Given a map space A -> B, return the map space [A -> B] -> B.
1558 */
1559 __isl_give isl_space *isl_space_range_map(__isl_take isl_space *space)
1560 {
1561 isl_space *range;
1562
1563 range = isl_space_from_range(isl_space_range(isl_space_copy(space)));
1564 space = isl_space_from_domain(isl_space_wrap(space));
1565 space = isl_space_join(space, range);
1566
1567 return space;
1568 }
1569
1570 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1571 {
1572 if (isl_space_is_params(space))
1573 return space;
1574 space = isl_space_drop_dims(space,
1575 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1576 space = isl_space_drop_dims(space,
1577 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1578 space = mark_as_params(space);
1579 return space;
1580 }
1581
1582 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1583 {
1584 if (!space)
1585 return NULL;
1586 if (!isl_space_is_params(space))
1587 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1588 "not a parameter space", goto error);
1589 return isl_space_reset(space, isl_dim_set);
1590 error:
1591 isl_space_free(space);
1592 return NULL;
1593 }
1594
1595 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1596 {
1597 dim = isl_space_cow(dim);
1598 if (!dim)
1599 return NULL;
1600
1601 dim->n_out += dim->n_in;
1602 dim->n_in = 0;
1603 dim = isl_space_reset(dim, isl_dim_in);
1604 dim = isl_space_reset(dim, isl_dim_out);
1605
1606 return dim;
1607 }
1608
1609 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1610 unsigned n_div)
1611 {
1612 int i;
1613
1614 if (!dim)
1615 return NULL;
1616 if (n_div == 0 &&
1617 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1618 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1619 dim = isl_space_cow(dim);
1620 if (!dim)
1621 return NULL;
1622 dim->n_out += dim->nparam + dim->n_in + n_div;
1623 dim->nparam = 0;
1624 dim->n_in = 0;
1625
1626 for (i = 0; i < dim->n_id; ++i)
1627 isl_id_free(get_id(dim, isl_dim_out, i));
1628 dim->n_id = 0;
1629 dim = isl_space_reset(dim, isl_dim_in);
1630 dim = isl_space_reset(dim, isl_dim_out);
1631
1632 return dim;
1633 }
1634
1635 /* Are the two spaces the same, including positions and names of parameters?
1636 */
1637 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1638 {
1639 if (!dim1 || !dim2)
1640 return -1;
1641 if (dim1 == dim2)
1642 return 1;
1643 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1644 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1645 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1646 }
1647
1648 /* Is space1 equal to the domain of space2?
1649 *
1650 * In the internal version we also allow space2 to be the space of a set,
1651 * provided space1 is a parameter space.
1652 */
1653 int isl_space_is_domain_internal(__isl_keep isl_space *space1,
1654 __isl_keep isl_space *space2)
1655 {
1656 if (!space1 || !space2)
1657 return -1;
1658 if (!isl_space_is_set(space1))
1659 return 0;
1660 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1661 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1662 }
1663
1664 /* Is space1 equal to the domain of space2?
1665 */
1666 int isl_space_is_domain(__isl_keep isl_space *space1,
1667 __isl_keep isl_space *space2)
1668 {
1669 if (!space2)
1670 return -1;
1671 if (!isl_space_is_map(space2))
1672 return 0;
1673 return isl_space_is_domain_internal(space1, space2);
1674 }
1675
1676 /* Is space1 equal to the range of space2?
1677 *
1678 * In the internal version, space2 is allowed to be the space of a set,
1679 * in which case it should be equal to space1.
1680 */
1681 int isl_space_is_range_internal(__isl_keep isl_space *space1,
1682 __isl_keep isl_space *space2)
1683 {
1684 if (!space1 || !space2)
1685 return -1;
1686 if (!isl_space_is_set(space1))
1687 return 0;
1688 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1689 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_out);
1690 }
1691
1692 /* Is space1 equal to the range of space2?
1693 */
1694 int isl_space_is_range(__isl_keep isl_space *space1,
1695 __isl_keep isl_space *space2)
1696 {
1697 if (!space2)
1698 return -1;
1699 if (!isl_space_is_map(space2))
1700 return 0;
1701 return isl_space_is_range_internal(space1, space2);
1702 }
1703
1704 int isl_space_compatible(__isl_keep isl_space *dim1,
1705 __isl_keep isl_space *dim2)
1706 {
1707 return dim1->nparam == dim2->nparam &&
1708 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1709 }
1710
1711 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1712 {
1713 int i;
1714 isl_id *id;
1715
1716 if (!dim)
1717 return hash;
1718
1719 isl_hash_byte(hash, dim->nparam % 256);
1720 isl_hash_byte(hash, dim->n_in % 256);
1721 isl_hash_byte(hash, dim->n_out % 256);
1722
1723 for (i = 0; i < dim->nparam; ++i) {
1724 id = get_id(dim, isl_dim_param, i);
1725 hash = isl_hash_id(hash, id);
1726 }
1727
1728 id = tuple_id(dim, isl_dim_in);
1729 hash = isl_hash_id(hash, id);
1730 id = tuple_id(dim, isl_dim_out);
1731 hash = isl_hash_id(hash, id);
1732
1733 hash = isl_hash_dim(hash, dim->nested[0]);
1734 hash = isl_hash_dim(hash, dim->nested[1]);
1735
1736 return hash;
1737 }
1738
1739 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1740 {
1741 uint32_t hash;
1742
1743 if (!dim)
1744 return 0;
1745
1746 hash = isl_hash_init();
1747 hash = isl_hash_dim(hash, dim);
1748
1749 return hash;
1750 }
1751
1752 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1753 {
1754 if (!dim)
1755 return -1;
1756
1757 if (!isl_space_is_set(dim))
1758 return 0;
1759
1760 return dim->nested[1] != NULL;
1761 }
1762
1763 /* Is "space" the space of a map where the range is a wrapped map space?
1764 */
1765 int isl_space_range_is_wrapping(__isl_keep isl_space *space)
1766 {
1767 if (!space)
1768 return -1;
1769
1770 if (isl_space_is_set(space))
1771 return 0;
1772
1773 return space->nested[1] != NULL;
1774 }
1775
1776 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1777 {
1778 isl_space *wrap;
1779
1780 if (!dim)
1781 return NULL;
1782
1783 wrap = isl_space_set_alloc(dim->ctx,
1784 dim->nparam, dim->n_in + dim->n_out);
1785
1786 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1787 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1788 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1789
1790 if (!wrap)
1791 goto error;
1792
1793 wrap->nested[1] = dim;
1794
1795 return wrap;
1796 error:
1797 isl_space_free(dim);
1798 return NULL;
1799 }
1800
1801 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1802 {
1803 isl_space *unwrap;
1804
1805 if (!dim)
1806 return NULL;
1807
1808 if (!isl_space_is_wrapping(dim))
1809 isl_die(dim->ctx, isl_error_invalid, "not a wrapping space",
1810 goto error);
1811
1812 unwrap = isl_space_copy(dim->nested[1]);
1813 isl_space_free(dim);
1814
1815 return unwrap;
1816 error:
1817 isl_space_free(dim);
1818 return NULL;
1819 }
1820
1821 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1822 {
1823 if (type != isl_dim_in && type != isl_dim_out)
1824 return 0;
1825 if (!dim)
1826 return -1;
1827 if (dim->tuple_id[type - isl_dim_in])
1828 return 1;
1829 if (dim->nested[type - isl_dim_in])
1830 return 1;
1831 return 0;
1832 }
1833
1834 int isl_space_may_be_set(__isl_keep isl_space *dim)
1835 {
1836 if (!dim)
1837 return -1;
1838 if (isl_space_is_set(dim))
1839 return 1;
1840 if (isl_space_dim(dim, isl_dim_in) != 0)
1841 return 0;
1842 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1843 return 0;
1844 return 1;
1845 }
1846
1847 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1848 enum isl_dim_type type)
1849 {
1850 if (!isl_space_is_named_or_nested(dim, type))
1851 return dim;
1852
1853 dim = isl_space_cow(dim);
1854 if (!dim)
1855 return NULL;
1856
1857 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1858 dim->tuple_id[type - isl_dim_in] = NULL;
1859 isl_space_free(dim->nested[type - isl_dim_in]);
1860 dim->nested[type - isl_dim_in] = NULL;
1861
1862 return dim;
1863 }
1864
1865 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1866 {
1867 if (!dim)
1868 return NULL;
1869 if (!dim->nested[0] && !dim->nested[1])
1870 return dim;
1871
1872 if (dim->nested[0])
1873 dim = isl_space_reset(dim, isl_dim_in);
1874 if (dim && dim->nested[1])
1875 dim = isl_space_reset(dim, isl_dim_out);
1876
1877 return dim;
1878 }
1879
1880 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1881 {
1882 if (!dim)
1883 return NULL;
1884 if (!dim->nested[0])
1885 return dim;
1886
1887 return isl_space_reset(dim, isl_dim_in);
1888 }
1889
1890 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1891 {
1892 if (!dim)
1893 return NULL;
1894 if (!dim->nested[1])
1895 return dim;
1896
1897 return isl_space_reset(dim, isl_dim_out);
1898 }
1899
1900 /* Replace the dimensions of the given type of dst by those of src.
1901 */
1902 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1903 enum isl_dim_type type, __isl_keep isl_space *src)
1904 {
1905 dst = isl_space_cow(dst);
1906
1907 if (!dst || !src)
1908 goto error;
1909
1910 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1911 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1912 dst = copy_ids(dst, type, 0, src, type);
1913
1914 if (dst && type == isl_dim_param) {
1915 int i;
1916 for (i = 0; i <= 1; ++i) {
1917 if (!dst->nested[i])
1918 continue;
1919 dst->nested[i] = isl_space_replace(dst->nested[i],
1920 type, src);
1921 if (!dst->nested[i])
1922 goto error;
1923 }
1924 }
1925
1926 return dst;
1927 error:
1928 isl_space_free(dst);
1929 return NULL;
1930 }
1931
1932 /* Given a dimension specification "dim" of a set, create a dimension
1933 * specification for the lift of the set. In particular, the result
1934 * is of the form [dim -> local[..]], with n_local variables in the
1935 * range of the wrapped map.
1936 */
1937 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1938 {
1939 isl_space *local_dim;
1940
1941 if (!dim)
1942 return NULL;
1943
1944 local_dim = isl_space_dup(dim);
1945 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1946 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1947 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1948 dim = isl_space_join(isl_space_from_domain(dim),
1949 isl_space_from_range(local_dim));
1950 dim = isl_space_wrap(dim);
1951 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1952
1953 return dim;
1954 }
1955
1956 int isl_space_can_zip(__isl_keep isl_space *dim)
1957 {
1958 if (!dim)
1959 return -1;
1960
1961 return dim->nested[0] && dim->nested[1];
1962 }
1963
1964 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1965 {
1966 isl_space *dom, *ran;
1967 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1968
1969 if (!isl_space_can_zip(dim))
1970 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1971 goto error);
1972
1973 if (!dim)
1974 return NULL;
1975 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1976 ran = isl_space_unwrap(isl_space_range(dim));
1977 dom_dom = isl_space_domain(isl_space_copy(dom));
1978 dom_ran = isl_space_range(dom);
1979 ran_dom = isl_space_domain(isl_space_copy(ran));
1980 ran_ran = isl_space_range(ran);
1981 dom = isl_space_join(isl_space_from_domain(dom_dom),
1982 isl_space_from_range(ran_dom));
1983 ran = isl_space_join(isl_space_from_domain(dom_ran),
1984 isl_space_from_range(ran_ran));
1985 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1986 isl_space_from_range(isl_space_wrap(ran)));
1987 error:
1988 isl_space_free(dim);
1989 return NULL;
1990 }
1991
1992 /* Can we apply isl_space_curry to "space"?
1993 * That is, does it have a nested relation in its domain?
1994 */
1995 int isl_space_can_curry(__isl_keep isl_space *space)
1996 {
1997 if (!space)
1998 return -1;
1999
2000 return !!space->nested[0];
2001 }
2002
2003 /* Given a space (A -> B) -> C, return the corresponding space
2004 * A -> (B -> C).
2005 */
2006 __isl_give isl_space *isl_space_curry(__isl_take isl_space *space)
2007 {
2008 isl_space *dom, *ran;
2009 isl_space *dom_dom, *dom_ran;
2010
2011 if (!space)
2012 return NULL;
2013
2014 if (!isl_space_can_curry(space))
2015 isl_die(space->ctx, isl_error_invalid,
2016 "space cannot be curried", goto error);
2017
2018 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(space)));
2019 ran = isl_space_range(space);
2020 dom_dom = isl_space_domain(isl_space_copy(dom));
2021 dom_ran = isl_space_range(dom);
2022 ran = isl_space_join(isl_space_from_domain(dom_ran),
2023 isl_space_from_range(ran));
2024 return isl_space_join(isl_space_from_domain(dom_dom),
2025 isl_space_from_range(isl_space_wrap(ran)));
2026 error:
2027 isl_space_free(space);
2028 return NULL;
2029 }
2030
2031 /* Can we apply isl_space_uncurry to "space"?
2032 * That is, does it have a nested relation in its range?
2033 */
2034 int isl_space_can_uncurry(__isl_keep isl_space *space)
2035 {
2036 if (!space)
2037 return -1;
2038
2039 return !!space->nested[1];
2040 }
2041
2042 /* Given a space A -> (B -> C), return the corresponding space
2043 * (A -> B) -> C.
2044 */
2045 __isl_give isl_space *isl_space_uncurry(__isl_take isl_space *space)
2046 {
2047 isl_space *dom, *ran;
2048 isl_space *ran_dom, *ran_ran;
2049
2050 if (!space)
2051 return NULL;
2052
2053 if (!isl_space_can_uncurry(space))
2054 isl_die(space->ctx, isl_error_invalid,
2055 "space cannot be uncurried",
2056 return isl_space_free(space));
2057
2058 dom = isl_space_domain(isl_space_copy(space));
2059 ran = isl_space_unwrap(isl_space_range(space));
2060 ran_dom = isl_space_domain(isl_space_copy(ran));
2061 ran_ran = isl_space_range(ran);
2062 dom = isl_space_join(isl_space_from_domain(dom),
2063 isl_space_from_range(ran_dom));
2064 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2065 isl_space_from_range(ran_ran));
2066 }
2067
2068 int isl_space_has_named_params(__isl_keep isl_space *dim)
2069 {
2070 int i;
2071 unsigned off;
2072
2073 if (!dim)
2074 return -1;
2075 if (dim->nparam == 0)
2076 return 1;
2077 off = isl_space_offset(dim, isl_dim_param);
2078 if (off + dim->nparam > dim->n_id)
2079 return 0;
2080 for (i = 0; i < dim->nparam; ++i)
2081 if (!dim->ids[off + i])
2082 return 0;
2083 return 1;
2084 }
2085
2086 /* Align the initial parameters of dim1 to match the order in dim2.
2087 */
2088 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
2089 __isl_take isl_space *dim2)
2090 {
2091 isl_reordering *exp;
2092
2093 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
2094 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
2095 "parameter alignment requires named parameters",
2096 goto error);
2097
2098 dim2 = isl_space_params(dim2);
2099 exp = isl_parameter_alignment_reordering(dim1, dim2);
2100 exp = isl_reordering_extend_space(exp, dim1);
2101 isl_space_free(dim2);
2102 if (!exp)
2103 return NULL;
2104 dim1 = isl_space_copy(exp->dim);
2105 isl_reordering_free(exp);
2106 return dim1;
2107 error:
2108 isl_space_free(dim1);
2109 isl_space_free(dim2);
2110 return NULL;
2111 }
2112
2113 /* Given the space of set (domain), construct a space for a map
2114 * with as domain the given space and as range the range of "model".
2115 */
2116 __isl_give isl_space *isl_space_extend_domain_with_range(
2117 __isl_take isl_space *space, __isl_take isl_space *model)
2118 {
2119 if (!model)
2120 goto error;
2121
2122 space = isl_space_from_domain(space);
2123 space = isl_space_add_dims(space, isl_dim_out,
2124 isl_space_dim(model, isl_dim_out));
2125 if (isl_space_has_tuple_id(model, isl_dim_out))
2126 space = isl_space_set_tuple_id(space, isl_dim_out,
2127 isl_space_get_tuple_id(model, isl_dim_out));
2128 if (!space)
2129 goto error;
2130 if (model->nested[1]) {
2131 isl_space *nested = isl_space_copy(model->nested[1]);
2132 int n_nested, n_space;
2133 nested = isl_space_align_params(nested, isl_space_copy(space));
2134 n_nested = isl_space_dim(nested, isl_dim_param);
2135 n_space = isl_space_dim(space, isl_dim_param);
2136 if (n_nested > n_space)
2137 nested = isl_space_drop_dims(nested, isl_dim_param,
2138 n_space, n_nested - n_space);
2139 if (!nested)
2140 goto error;
2141 space->nested[1] = nested;
2142 }
2143 isl_space_free(model);
2144 return space;
2145 error:
2146 isl_space_free(model);
2147 isl_space_free(space);
2148 return NULL;
2149 }
Integer set library