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Merge branch 'maint'
[isl.git] / isl_space.c
blobfb638738914132b097eef6987fe9b67209729094
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
4 *
5 * Use of this software is governed by the GNU LGPLv2.1 license
6 *
7 * Written by Sven Verdoolaege, K.U.Leuven, Departement
8 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
9 * and INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
10 * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France
11 */
12
13 #include <stdlib.h>
14 #include <isl_space_private.h>
15 #include <isl_id_private.h>
16 #include <isl_reordering.h>
17
18 isl_ctx *isl_space_get_ctx(__isl_keep isl_space *dim)
19 {
20 return dim ? dim->ctx : NULL;
21 }
22
23 __isl_give isl_space *isl_space_alloc(isl_ctx *ctx,
24 unsigned nparam, unsigned n_in, unsigned n_out)
25 {
26 isl_space *dim;
27
28 dim = isl_alloc_type(ctx, struct isl_space);
29 if (!dim)
30 return NULL;
31
32 dim->ctx = ctx;
33 isl_ctx_ref(ctx);
34 dim->ref = 1;
35 dim->nparam = nparam;
36 dim->n_in = n_in;
37 dim->n_out = n_out;
38
39 dim->tuple_id[0] = NULL;
40 dim->tuple_id[1] = NULL;
41
42 dim->nested[0] = NULL;
43 dim->nested[1] = NULL;
44
45 dim->n_id = 0;
46 dim->ids = NULL;
47
48 return dim;
49 }
50
51 /* Mark the space as being that of a set, by setting the domain tuple
52 * to isl_id_none.
53 */
54 static __isl_give isl_space *mark_as_set(__isl_take isl_space *space)
55 {
56 space = isl_space_cow(space);
57 if (!space)
58 return NULL;
59 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
60 return space;
61 }
62
63 /* Is the space that of a set?
64 */
65 int isl_space_is_set(__isl_keep isl_space *space)
66 {
67 if (!space)
68 return -1;
69 if (space->n_in != 0 || space->nested[0])
70 return 0;
71 if (space->tuple_id[0] != &isl_id_none)
72 return 0;
73 return 1;
74 }
75
76 __isl_give isl_space *isl_space_set_alloc(isl_ctx *ctx,
77 unsigned nparam, unsigned dim)
78 {
79 isl_space *space;
80 space = isl_space_alloc(ctx, nparam, 0, dim);
81 space = mark_as_set(space);
82 return space;
83 }
84
85 /* Mark the space as being that of a parameter domain, by setting
86 * both tuples to isl_id_none.
87 */
88 static __isl_give isl_space *mark_as_params(isl_space *space)
89 {
90 if (!space)
91 return NULL;
92 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
93 space = isl_space_set_tuple_id(space, isl_dim_out, &isl_id_none);
94 return space;
95 }
96
97 /* Is the space that of a parameter domain?
98 */
99 int isl_space_is_params(__isl_keep isl_space *space)
100 {
101 if (!space)
102 return -1;
103 if (space->n_in != 0 || space->nested[0] ||
104 space->n_out != 0 || space->nested[1])
105 return 0;
106 if (space->tuple_id[0] != &isl_id_none)
107 return 0;
108 if (space->tuple_id[1] != &isl_id_none)
109 return 0;
110 return 1;
111 }
112
113 /* Create a space for a parameter domain.
114 */
115 __isl_give isl_space *isl_space_params_alloc(isl_ctx *ctx, unsigned nparam)
116 {
117 isl_space *space;
118 space = isl_space_alloc(ctx, nparam, 0, 0);
119 space = mark_as_params(space);
120 return space;
121 }
122
123 static unsigned global_pos(__isl_keep isl_space *dim,
124 enum isl_dim_type type, unsigned pos)
125 {
126 struct isl_ctx *ctx = dim->ctx;
127
128 switch (type) {
129 case isl_dim_param:
130 isl_assert(ctx, pos < dim->nparam,
131 return isl_space_dim(dim, isl_dim_all));
132 return pos;
133 case isl_dim_in:
134 isl_assert(ctx, pos < dim->n_in,
135 return isl_space_dim(dim, isl_dim_all));
136 return pos + dim->nparam;
137 case isl_dim_out:
138 isl_assert(ctx, pos < dim->n_out,
139 return isl_space_dim(dim, isl_dim_all));
140 return pos + dim->nparam + dim->n_in;
141 default:
142 isl_assert(ctx, 0, return isl_space_dim(dim, isl_dim_all));
143 }
144 return isl_space_dim(dim, isl_dim_all);
145 }
146
147 /* Extend length of ids array to the total number of dimensions.
148 */
149 static __isl_give isl_space *extend_ids(__isl_take isl_space *dim)
150 {
151 isl_id **ids;
152 int i;
153
154 if (isl_space_dim(dim, isl_dim_all) <= dim->n_id)
155 return dim;
156
157 if (!dim->ids) {
158 dim->ids = isl_calloc_array(dim->ctx,
159 isl_id *, isl_space_dim(dim, isl_dim_all));
160 if (!dim->ids)
161 goto error;
162 } else {
163 ids = isl_realloc_array(dim->ctx, dim->ids,
164 isl_id *, isl_space_dim(dim, isl_dim_all));
165 if (!ids)
166 goto error;
167 dim->ids = ids;
168 for (i = dim->n_id; i < isl_space_dim(dim, isl_dim_all); ++i)
169 dim->ids[i] = NULL;
170 }
171
172 dim->n_id = isl_space_dim(dim, isl_dim_all);
173
174 return dim;
175 error:
176 isl_space_free(dim);
177 return NULL;
178 }
179
180 static __isl_give isl_space *set_id(__isl_take isl_space *dim,
181 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
182 {
183 dim = isl_space_cow(dim);
184
185 if (!dim)
186 goto error;
187
188 pos = global_pos(dim, type, pos);
189 if (pos == isl_space_dim(dim, isl_dim_all))
190 goto error;
191
192 if (pos >= dim->n_id) {
193 if (!id)
194 return dim;
195 dim = extend_ids(dim);
196 if (!dim)
197 goto error;
198 }
199
200 dim->ids[pos] = id;
201
202 return dim;
203 error:
204 isl_id_free(id);
205 isl_space_free(dim);
206 return NULL;
207 }
208
209 static __isl_keep isl_id *get_id(__isl_keep isl_space *dim,
210 enum isl_dim_type type, unsigned pos)
211 {
212 if (!dim)
213 return NULL;
214
215 pos = global_pos(dim, type, pos);
216 if (pos == isl_space_dim(dim, isl_dim_all))
217 return NULL;
218 if (pos >= dim->n_id)
219 return NULL;
220 return dim->ids[pos];
221 }
222
223 static unsigned offset(__isl_keep isl_space *dim, enum isl_dim_type type)
224 {
225 switch (type) {
226 case isl_dim_param: return 0;
227 case isl_dim_in: return dim->nparam;
228 case isl_dim_out: return dim->nparam + dim->n_in;
229 default: return 0;
230 }
231 }
232
233 static unsigned n(__isl_keep isl_space *dim, enum isl_dim_type type)
234 {
235 switch (type) {
236 case isl_dim_param: return dim->nparam;
237 case isl_dim_in: return dim->n_in;
238 case isl_dim_out: return dim->n_out;
239 case isl_dim_all: return dim->nparam + dim->n_in + dim->n_out;
240 default: return 0;
241 }
242 }
243
244 unsigned isl_space_dim(__isl_keep isl_space *dim, enum isl_dim_type type)
245 {
246 if (!dim)
247 return 0;
248 return n(dim, type);
249 }
250
251 unsigned isl_space_offset(__isl_keep isl_space *dim, enum isl_dim_type type)
252 {
253 if (!dim)
254 return 0;
255 return offset(dim, type);
256 }
257
258 static __isl_give isl_space *copy_ids(__isl_take isl_space *dst,
259 enum isl_dim_type dst_type, unsigned offset, __isl_keep isl_space *src,
260 enum isl_dim_type src_type)
261 {
262 int i;
263 isl_id *id;
264
265 if (!dst)
266 return NULL;
267
268 for (i = 0; i < n(src, src_type); ++i) {
269 id = get_id(src, src_type, i);
270 if (!id)
271 continue;
272 dst = set_id(dst, dst_type, offset + i, isl_id_copy(id));
273 if (!dst)
274 return NULL;
275 }
276 return dst;
277 }
278
279 __isl_take isl_space *isl_space_dup(__isl_keep isl_space *dim)
280 {
281 isl_space *dup;
282 if (!dim)
283 return NULL;
284 dup = isl_space_alloc(dim->ctx, dim->nparam, dim->n_in, dim->n_out);
285 if (dim->tuple_id[0] &&
286 !(dup->tuple_id[0] = isl_id_copy(dim->tuple_id[0])))
287 goto error;
288 if (dim->tuple_id[1] &&
289 !(dup->tuple_id[1] = isl_id_copy(dim->tuple_id[1])))
290 goto error;
291 if (dim->nested[0] && !(dup->nested[0] = isl_space_copy(dim->nested[0])))
292 goto error;
293 if (dim->nested[1] && !(dup->nested[1] = isl_space_copy(dim->nested[1])))
294 goto error;
295 if (!dim->ids)
296 return dup;
297 dup = copy_ids(dup, isl_dim_param, 0, dim, isl_dim_param);
298 dup = copy_ids(dup, isl_dim_in, 0, dim, isl_dim_in);
299 dup = copy_ids(dup, isl_dim_out, 0, dim, isl_dim_out);
300 return dup;
301 error:
302 isl_space_free(dup);
303 return NULL;
304 }
305
306 __isl_give isl_space *isl_space_cow(__isl_take isl_space *dim)
307 {
308 if (!dim)
309 return NULL;
310
311 if (dim->ref == 1)
312 return dim;
313 dim->ref--;
314 return isl_space_dup(dim);
315 }
316
317 __isl_give isl_space *isl_space_copy(__isl_keep isl_space *dim)
318 {
319 if (!dim)
320 return NULL;
321
322 dim->ref++;
323 return dim;
324 }
325
326 void isl_space_free(__isl_take isl_space *dim)
327 {
328 int i;
329
330 if (!dim)
331 return;
332
333 if (--dim->ref > 0)
334 return;
335
336 isl_id_free(dim->tuple_id[0]);
337 isl_id_free(dim->tuple_id[1]);
338
339 isl_space_free(dim->nested[0]);
340 isl_space_free(dim->nested[1]);
341
342 for (i = 0; i < dim->n_id; ++i)
343 isl_id_free(dim->ids[i]);
344 free(dim->ids);
345 isl_ctx_deref(dim->ctx);
346
347 free(dim);
348 }
349
350 /* Check if "s" is a valid dimension or tuple name.
351 * We currently only forbid names that look like a number.
352 *
353 * s is assumed to be non-NULL.
354 */
355 static int name_ok(isl_ctx *ctx, const char *s)
356 {
357 char *p;
358 long dummy;
359
360 dummy = strtol(s, &p, 0);
361 if (p != s)
362 isl_die(ctx, isl_error_invalid, "name looks like a number",
363 return 0);
364
365 return 1;
366 }
367
368 /* Is it possible for the given dimension type to have a tuple id?
369 */
370 static int space_can_have_id(__isl_keep isl_space *space,
371 enum isl_dim_type type)
372 {
373 if (!space)
374 return 0;
375 if (isl_space_is_params(space))
376 isl_die(space->ctx, isl_error_invalid,
377 "parameter spaces don't have tuple ids", return 0);
378 if (isl_space_is_set(space) && type != isl_dim_set)
379 isl_die(space->ctx, isl_error_invalid,
380 "set spaces can only have a set id", return 0);
381 if (type != isl_dim_in && type != isl_dim_out)
382 isl_die(space->ctx, isl_error_invalid,
383 "only input, output and set tuples can have ids",
384 return 0);
385
386 return 1;
387 }
388
389 /* Does the tuple have an id?
390 */
391 int isl_space_has_tuple_id(__isl_keep isl_space *dim, enum isl_dim_type type)
392 {
393 if (!space_can_have_id(dim, type))
394 return -1;
395 return dim->tuple_id[type - isl_dim_in] != NULL;
396 }
397
398 __isl_give isl_id *isl_space_get_tuple_id(__isl_keep isl_space *dim,
399 enum isl_dim_type type)
400 {
401 int has_id;
402
403 if (!dim)
404 return NULL;
405 has_id = isl_space_has_tuple_id(dim, type);
406 if (has_id < 0)
407 return NULL;
408 if (!has_id)
409 isl_die(dim->ctx, isl_error_invalid,
410 "tuple has no id", return NULL);
411 return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
412 }
413
414 __isl_give isl_space *isl_space_set_tuple_id(__isl_take isl_space *dim,
415 enum isl_dim_type type, __isl_take isl_id *id)
416 {
417 dim = isl_space_cow(dim);
418 if (!dim || !id)
419 goto error;
420 if (type != isl_dim_in && type != isl_dim_out)
421 isl_die(dim->ctx, isl_error_invalid,
422 "only input, output and set tuples can have names",
423 goto error);
424
425 isl_id_free(dim->tuple_id[type - isl_dim_in]);
426 dim->tuple_id[type - isl_dim_in] = id;
427
428 return dim;
429 error:
430 isl_id_free(id);
431 isl_space_free(dim);
432 return NULL;
433 }
434
435 __isl_give isl_space *isl_space_reset_tuple_id(__isl_take isl_space *dim,
436 enum isl_dim_type type)
437 {
438 dim = isl_space_cow(dim);
439 if (!dim)
440 return NULL;
441 if (type != isl_dim_in && type != isl_dim_out)
442 isl_die(dim->ctx, isl_error_invalid,
443 "only input, output and set tuples can have names",
444 goto error);
445
446 isl_id_free(dim->tuple_id[type - isl_dim_in]);
447 dim->tuple_id[type - isl_dim_in] = NULL;
448
449 return dim;
450 error:
451 isl_space_free(dim);
452 return NULL;
453 }
454
455 /* Set the id of the given dimension of "space" to "id".
456 * If the dimension already has an id, then it is replaced.
457 * If the dimension is a parameter, then we need to change it
458 * in the nested spaces (if any) as well.
459 */
460 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *space,
461 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
462 {
463 space = isl_space_cow(space);
464 if (!space || !id)
465 goto error;
466
467 if (type == isl_dim_param) {
468 int i;
469
470 for (i = 0; i < 2; ++i) {
471 if (!space->nested[i])
472 continue;
473 space->nested[i] =
474 isl_space_set_dim_id(space->nested[i],
475 type, pos, isl_id_copy(id));
476 if (!space->nested[i])
477 goto error;
478 }
479 }
480
481 isl_id_free(get_id(space, type, pos));
482 return set_id(space, type, pos, id);
483 error:
484 isl_id_free(id);
485 isl_space_free(space);
486 return NULL;
487 }
488
489 /* Reset the id of the given dimension of "space".
490 * If the dimension already has an id, then it is removed.
491 * If the dimension is a parameter, then we need to reset it
492 * in the nested spaces (if any) as well.
493 */
494 __isl_give isl_space *isl_space_reset_dim_id(__isl_take isl_space *space,
495 enum isl_dim_type type, unsigned pos)
496 {
497 space = isl_space_cow(space);
498 if (!space)
499 goto error;
500
501 if (type == isl_dim_param) {
502 int i;
503
504 for (i = 0; i < 2; ++i) {
505 if (!space->nested[i])
506 continue;
507 space->nested[i] =
508 isl_space_reset_dim_id(space->nested[i],
509 type, pos);
510 if (!space->nested[i])
511 goto error;
512 }
513 }
514
515 isl_id_free(get_id(space, type, pos));
516 return set_id(space, type, pos, NULL);
517 error:
518 isl_space_free(space);
519 return NULL;
520 }
521
522 int isl_space_has_dim_id(__isl_keep isl_space *dim,
523 enum isl_dim_type type, unsigned pos)
524 {
525 if (!dim)
526 return -1;
527 return get_id(dim, type, pos) != NULL;
528 }
529
530 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
531 enum isl_dim_type type, unsigned pos)
532 {
533 if (!dim)
534 return NULL;
535 if (!get_id(dim, type, pos))
536 isl_die(dim->ctx, isl_error_invalid,
537 "dim has no id", return NULL);
538 return isl_id_copy(get_id(dim, type, pos));
539 }
540
541 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
542 enum isl_dim_type type, const char *s)
543 {
544 isl_id *id;
545
546 if (!dim)
547 return NULL;
548
549 if (!s)
550 return isl_space_reset_tuple_id(dim, type);
551
552 if (!name_ok(dim->ctx, s))
553 goto error;
554
555 id = isl_id_alloc(dim->ctx, s, NULL);
556 return isl_space_set_tuple_id(dim, type, id);
557 error:
558 isl_space_free(dim);
559 return NULL;
560 }
561
562 /* Does the tuple have a name?
563 */
564 int isl_space_has_tuple_name(__isl_keep isl_space *space,
565 enum isl_dim_type type)
566 {
567 isl_id *id;
568
569 if (!space_can_have_id(space, type))
570 return -1;
571 id = space->tuple_id[type - isl_dim_in];
572 return id && id->name;
573 }
574
575 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
576 enum isl_dim_type type)
577 {
578 isl_id *id;
579 if (!dim)
580 return NULL;
581 if (type != isl_dim_in && type != isl_dim_out)
582 return NULL;
583 id = dim->tuple_id[type - isl_dim_in];
584 return id ? id->name : NULL;
585 }
586
587 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
588 enum isl_dim_type type, unsigned pos,
589 const char *s)
590 {
591 isl_id *id;
592
593 if (!dim)
594 return NULL;
595 if (!s)
596 return isl_space_reset_dim_id(dim, type, pos);
597 if (!name_ok(dim->ctx, s))
598 goto error;
599 id = isl_id_alloc(dim->ctx, s, NULL);
600 return isl_space_set_dim_id(dim, type, pos, id);
601 error:
602 isl_space_free(dim);
603 return NULL;
604 }
605
606 /* Does the given dimension have a name?
607 */
608 int isl_space_has_dim_name(__isl_keep isl_space *space,
609 enum isl_dim_type type, unsigned pos)
610 {
611 isl_id *id;
612
613 if (!space)
614 return -1;
615 id = get_id(space, type, pos);
616 return id && id->name;
617 }
618
619 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
620 enum isl_dim_type type, unsigned pos)
621 {
622 isl_id *id = get_id(dim, type, pos);
623 return id ? id->name : NULL;
624 }
625
626 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
627 __isl_keep isl_id *id)
628 {
629 int i;
630 int offset;
631 int n;
632
633 if (!dim || !id)
634 return -1;
635
636 offset = isl_space_offset(dim, type);
637 n = isl_space_dim(dim, type);
638 for (i = 0; i < n && offset + i < dim->n_id; ++i)
639 if (dim->ids[offset + i] == id)
640 return i;
641
642 return -1;
643 }
644
645 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
646 enum isl_dim_type type, const char *name)
647 {
648 int i;
649 int offset;
650 int n;
651
652 if (!space || !name)
653 return -1;
654
655 offset = isl_space_offset(space, type);
656 n = isl_space_dim(space, type);
657 for (i = 0; i < n && offset + i < space->n_id; ++i)
658 if (space->ids[offset + i]->name &&
659 !strcmp(space->ids[offset + i]->name, name))
660 return i;
661
662 return -1;
663 }
664
665 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
666 enum isl_dim_type type)
667 {
668 if (!dim)
669 return NULL;
670 if (type == isl_dim_in)
671 return dim->tuple_id[0];
672 if (type == isl_dim_out)
673 return dim->tuple_id[1];
674 return NULL;
675 }
676
677 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
678 enum isl_dim_type type)
679 {
680 if (!dim)
681 return NULL;
682 if (type == isl_dim_in)
683 return dim->nested[0];
684 if (type == isl_dim_out)
685 return dim->nested[1];
686 return NULL;
687 }
688
689 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
690 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
691 {
692 isl_id *id1, *id2;
693 isl_space *nested1, *nested2;
694
695 if (!dim1 || !dim2)
696 return -1;
697
698 if (dim1 == dim2 && dim1_type == dim2_type)
699 return 1;
700
701 if (n(dim1, dim1_type) != n(dim2, dim2_type))
702 return 0;
703 id1 = tuple_id(dim1, dim1_type);
704 id2 = tuple_id(dim2, dim2_type);
705 if (!id1 ^ !id2)
706 return 0;
707 if (id1 && id1 != id2)
708 return 0;
709 nested1 = nested(dim1, dim1_type);
710 nested2 = nested(dim2, dim2_type);
711 if (!nested1 ^ !nested2)
712 return 0;
713 if (nested1 && !isl_space_is_equal(nested1, nested2))
714 return 0;
715 return 1;
716 }
717
718 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
719 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
720 {
721 int i;
722
723 if (dim1 == dim2 && dim1_type == dim2_type)
724 return 1;
725
726 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
727 return 0;
728
729 if (!dim1->ids && !dim2->ids)
730 return 1;
731
732 for (i = 0; i < n(dim1, dim1_type); ++i) {
733 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
734 return 0;
735 }
736 return 1;
737 }
738
739 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
740 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
741 {
742 if (!dim1 || !dim2)
743 return -1;
744
745 return match(dim1, dim1_type, dim2, dim2_type);
746 }
747
748 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
749 unsigned first, unsigned n, __isl_keep isl_id **ids)
750 {
751 int i;
752
753 for (i = 0; i < n ; ++i)
754 ids[i] = get_id(dim, type, first + i);
755 }
756
757 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
758 unsigned nparam, unsigned n_in, unsigned n_out)
759 {
760 isl_id **ids = NULL;
761
762 if (!dim)
763 return NULL;
764 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
765 return dim;
766
767 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
768 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
769 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
770
771 dim = isl_space_cow(dim);
772
773 if (dim->ids) {
774 ids = isl_calloc_array(dim->ctx, isl_id *,
775 nparam + n_in + n_out);
776 if (!ids)
777 goto error;
778 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
779 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
780 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
781 free(dim->ids);
782 dim->ids = ids;
783 dim->n_id = nparam + n_in + n_out;
784 }
785 dim->nparam = nparam;
786 dim->n_in = n_in;
787 dim->n_out = n_out;
788
789 return dim;
790 error:
791 free(ids);
792 isl_space_free(dim);
793 return NULL;
794 }
795
796 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
797 enum isl_dim_type type, unsigned n)
798 {
799 if (!dim)
800 return NULL;
801 dim = isl_space_reset(dim, type);
802 switch (type) {
803 case isl_dim_param:
804 dim = isl_space_extend(dim,
805 dim->nparam + n, dim->n_in, dim->n_out);
806 if (dim && dim->nested[0] &&
807 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
808 isl_dim_param, n)))
809 goto error;
810 if (dim && dim->nested[1] &&
811 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
812 isl_dim_param, n)))
813 goto error;
814 return dim;
815 case isl_dim_in:
816 return isl_space_extend(dim,
817 dim->nparam, dim->n_in + n, dim->n_out);
818 case isl_dim_out:
819 return isl_space_extend(dim,
820 dim->nparam, dim->n_in, dim->n_out + n);
821 default:
822 isl_die(dim->ctx, isl_error_invalid,
823 "cannot add dimensions of specified type", goto error);
824 }
825 error:
826 isl_space_free(dim);
827 return NULL;
828 }
829
830 static int valid_dim_type(enum isl_dim_type type)
831 {
832 switch (type) {
833 case isl_dim_param:
834 case isl_dim_in:
835 case isl_dim_out:
836 return 1;
837 default:
838 return 0;
839 }
840 }
841
842 /* Insert "n" dimensions of type "type" at position "pos".
843 * If we are inserting parameters, then they are also inserted in
844 * any nested spaces.
845 */
846 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
847 enum isl_dim_type type, unsigned pos, unsigned n)
848 {
849 isl_id **ids = NULL;
850
851 if (!dim)
852 return NULL;
853 if (n == 0)
854 return isl_space_reset(dim, type);
855
856 if (!valid_dim_type(type))
857 isl_die(dim->ctx, isl_error_invalid,
858 "cannot insert dimensions of specified type",
859 goto error);
860
861 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
862
863 dim = isl_space_cow(dim);
864 if (!dim)
865 return NULL;
866
867 if (dim->ids) {
868 enum isl_dim_type t;
869 int off;
870 int s[3];
871 int *size = s - isl_dim_param;
872 ids = isl_calloc_array(dim->ctx, isl_id *,
873 dim->nparam + dim->n_in + dim->n_out + n);
874 if (!ids)
875 goto error;
876 off = 0;
877 size[isl_dim_param] = dim->nparam;
878 size[isl_dim_in] = dim->n_in;
879 size[isl_dim_out] = dim->n_out;
880 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
881 if (t != type) {
882 get_ids(dim, t, 0, size[t], ids + off);
883 off += size[t];
884 } else {
885 get_ids(dim, t, 0, pos, ids + off);
886 off += pos + n;
887 get_ids(dim, t, pos, size[t] - pos, ids + off);
888 off += size[t] - pos;
889 }
890 }
891 free(dim->ids);
892 dim->ids = ids;
893 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
894 }
895 switch (type) {
896 case isl_dim_param: dim->nparam += n; break;
897 case isl_dim_in: dim->n_in += n; break;
898 case isl_dim_out: dim->n_out += n; break;
899 default: ;
900 }
901 dim = isl_space_reset(dim, type);
902
903 if (type == isl_dim_param) {
904 if (dim && dim->nested[0] &&
905 !(dim->nested[0] = isl_space_insert_dims(dim->nested[0],
906 isl_dim_param, pos, n)))
907 goto error;
908 if (dim && dim->nested[1] &&
909 !(dim->nested[1] = isl_space_insert_dims(dim->nested[1],
910 isl_dim_param, pos, n)))
911 goto error;
912 }
913
914 return dim;
915 error:
916 isl_space_free(dim);
917 return NULL;
918 }
919
920 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
921 enum isl_dim_type dst_type, unsigned dst_pos,
922 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
923 {
924 int i;
925
926 if (!dim)
927 return NULL;
928 if (n == 0)
929 return dim;
930
931 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
932 goto error);
933
934 if (dst_type == src_type && dst_pos == src_pos)
935 return dim;
936
937 isl_assert(dim->ctx, dst_type != src_type, goto error);
938
939 dim = isl_space_reset(dim, src_type);
940 dim = isl_space_reset(dim, dst_type);
941
942 dim = isl_space_cow(dim);
943 if (!dim)
944 return NULL;
945
946 if (dim->ids) {
947 isl_id **ids;
948 enum isl_dim_type t;
949 int off;
950 int s[3];
951 int *size = s - isl_dim_param;
952 ids = isl_calloc_array(dim->ctx, isl_id *,
953 dim->nparam + dim->n_in + dim->n_out);
954 if (!ids)
955 goto error;
956 off = 0;
957 size[isl_dim_param] = dim->nparam;
958 size[isl_dim_in] = dim->n_in;
959 size[isl_dim_out] = dim->n_out;
960 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
961 if (t == dst_type) {
962 get_ids(dim, t, 0, dst_pos, ids + off);
963 off += dst_pos;
964 get_ids(dim, src_type, src_pos, n, ids + off);
965 off += n;
966 get_ids(dim, t, dst_pos, size[t] - dst_pos,
967 ids + off);
968 off += size[t] - dst_pos;
969 } else if (t == src_type) {
970 get_ids(dim, t, 0, src_pos, ids + off);
971 off += src_pos;
972 get_ids(dim, t, src_pos + n,
973 size[t] - src_pos - n, ids + off);
974 off += size[t] - src_pos - n;
975 } else {
976 get_ids(dim, t, 0, size[t], ids + off);
977 off += size[t];
978 }
979 }
980 free(dim->ids);
981 dim->ids = ids;
982 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
983 }
984
985 switch (dst_type) {
986 case isl_dim_param: dim->nparam += n; break;
987 case isl_dim_in: dim->n_in += n; break;
988 case isl_dim_out: dim->n_out += n; break;
989 default: ;
990 }
991
992 switch (src_type) {
993 case isl_dim_param: dim->nparam -= n; break;
994 case isl_dim_in: dim->n_in -= n; break;
995 case isl_dim_out: dim->n_out -= n; break;
996 default: ;
997 }
998
999 if (dst_type != isl_dim_param && src_type != isl_dim_param)
1000 return dim;
1001
1002 for (i = 0; i < 2; ++i) {
1003 if (!dim->nested[i])
1004 continue;
1005 dim->nested[i] = isl_space_replace(dim->nested[i],
1006 isl_dim_param, dim);
1007 if (!dim->nested[i])
1008 goto error;
1009 }
1010
1011 return dim;
1012 error:
1013 isl_space_free(dim);
1014 return NULL;
1015 }
1016
1017 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
1018 __isl_take isl_space *right)
1019 {
1020 isl_space *dim;
1021
1022 if (!left || !right)
1023 goto error;
1024
1025 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1026 goto error);
1027 isl_assert(left->ctx,
1028 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
1029 goto error);
1030
1031 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
1032 if (!dim)
1033 goto error;
1034
1035 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
1036 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
1037 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
1038
1039 if (dim && left->tuple_id[0] &&
1040 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
1041 goto error;
1042 if (dim && right->tuple_id[1] &&
1043 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
1044 goto error;
1045 if (dim && left->nested[0] &&
1046 !(dim->nested[0] = isl_space_copy(left->nested[0])))
1047 goto error;
1048 if (dim && right->nested[1] &&
1049 !(dim->nested[1] = isl_space_copy(right->nested[1])))
1050 goto error;
1051
1052 isl_space_free(left);
1053 isl_space_free(right);
1054
1055 return dim;
1056 error:
1057 isl_space_free(left);
1058 isl_space_free(right);
1059 return NULL;
1060 }
1061
1062 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
1063 __isl_take isl_space *right)
1064 {
1065 isl_space *dom1, *dom2, *nest1, *nest2;
1066
1067 if (!left || !right)
1068 goto error;
1069
1070 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1071 goto error);
1072
1073 dom1 = isl_space_domain(isl_space_copy(left));
1074 dom2 = isl_space_domain(isl_space_copy(right));
1075 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1076
1077 dom1 = isl_space_range(left);
1078 dom2 = isl_space_range(right);
1079 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1080
1081 return isl_space_join(isl_space_reverse(nest1), nest2);
1082 error:
1083 isl_space_free(left);
1084 isl_space_free(right);
1085 return NULL;
1086 }
1087
1088 /* Given two spaces { A -> C } and { B -> C }, construct the space
1089 * { [A -> B] -> C }
1090 */
1091 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1092 __isl_take isl_space *right)
1093 {
1094 isl_space *ran, *dom1, *dom2, *nest;
1095
1096 if (!left || !right)
1097 goto error;
1098
1099 if (!match(left, isl_dim_param, right, isl_dim_param))
1100 isl_die(left->ctx, isl_error_invalid,
1101 "parameters need to match", goto error);
1102 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
1103 isl_die(left->ctx, isl_error_invalid,
1104 "ranges need to match", goto error);
1105
1106 ran = isl_space_range(isl_space_copy(left));
1107
1108 dom1 = isl_space_domain(left);
1109 dom2 = isl_space_domain(right);
1110 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1111
1112 return isl_space_join(isl_space_reverse(nest), ran);
1113 error:
1114 isl_space_free(left);
1115 isl_space_free(right);
1116 return NULL;
1117 }
1118
1119 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1120 __isl_take isl_space *right)
1121 {
1122 isl_space *dom, *ran1, *ran2, *nest;
1123
1124 if (!left || !right)
1125 goto error;
1126
1127 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1128 goto error);
1129 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1130 isl_die(left->ctx, isl_error_invalid,
1131 "domains need to match", goto error);
1132
1133 dom = isl_space_domain(isl_space_copy(left));
1134
1135 ran1 = isl_space_range(left);
1136 ran2 = isl_space_range(right);
1137 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1138
1139 return isl_space_join(isl_space_reverse(dom), nest);
1140 error:
1141 isl_space_free(left);
1142 isl_space_free(right);
1143 return NULL;
1144 }
1145
1146 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1147 {
1148 isl_ctx *ctx;
1149 isl_id **ids = NULL;
1150
1151 if (!dim)
1152 return NULL;
1153 ctx = isl_space_get_ctx(dim);
1154 if (!isl_space_is_set(dim))
1155 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1156 dim = isl_space_cow(dim);
1157 if (!dim)
1158 return NULL;
1159 if (dim->ids) {
1160 ids = isl_calloc_array(dim->ctx, isl_id *,
1161 dim->nparam + dim->n_out + dim->n_out);
1162 if (!ids)
1163 goto error;
1164 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1165 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1166 }
1167 dim->n_in = dim->n_out;
1168 if (ids) {
1169 free(dim->ids);
1170 dim->ids = ids;
1171 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1172 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1173 }
1174 isl_id_free(dim->tuple_id[0]);
1175 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1176 isl_space_free(dim->nested[0]);
1177 dim->nested[0] = isl_space_copy(dim->nested[1]);
1178 return dim;
1179 error:
1180 isl_space_free(dim);
1181 return NULL;
1182 }
1183
1184 __isl_give isl_space *isl_space_map_from_domain_and_range(
1185 __isl_take isl_space *domain, __isl_take isl_space *range)
1186 {
1187 if (!domain || !range)
1188 goto error;
1189 if (!isl_space_is_set(domain))
1190 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1191 "domain is not a set space", goto error);
1192 if (!isl_space_is_set(range))
1193 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1194 "range is not a set space", goto error);
1195 return isl_space_join(isl_space_reverse(domain), range);
1196 error:
1197 isl_space_free(domain);
1198 isl_space_free(range);
1199 return NULL;
1200 }
1201
1202 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1203 enum isl_dim_type type,
1204 unsigned first, unsigned n, __isl_take isl_id **ids)
1205 {
1206 int i;
1207
1208 for (i = 0; i < n ; ++i)
1209 dim = set_id(dim, type, first + i, ids[i]);
1210
1211 return dim;
1212 }
1213
1214 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1215 {
1216 unsigned t;
1217 isl_space *nested;
1218 isl_id **ids = NULL;
1219 isl_id *id;
1220
1221 if (!dim)
1222 return NULL;
1223 if (match(dim, isl_dim_in, dim, isl_dim_out))
1224 return dim;
1225
1226 dim = isl_space_cow(dim);
1227 if (!dim)
1228 return NULL;
1229
1230 id = dim->tuple_id[0];
1231 dim->tuple_id[0] = dim->tuple_id[1];
1232 dim->tuple_id[1] = id;
1233
1234 nested = dim->nested[0];
1235 dim->nested[0] = dim->nested[1];
1236 dim->nested[1] = nested;
1237
1238 if (dim->ids) {
1239 ids = isl_alloc_array(dim->ctx, isl_id *,
1240 dim->n_in + dim->n_out);
1241 if (!ids)
1242 goto error;
1243 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1244 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1245 }
1246
1247 t = dim->n_in;
1248 dim->n_in = dim->n_out;
1249 dim->n_out = t;
1250
1251 if (dim->ids) {
1252 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1253 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1254 free(ids);
1255 }
1256
1257 return dim;
1258 error:
1259 free(ids);
1260 isl_space_free(dim);
1261 return NULL;
1262 }
1263
1264 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1265 enum isl_dim_type type, unsigned first, unsigned num)
1266 {
1267 int i;
1268
1269 if (!dim)
1270 return NULL;
1271
1272 if (num == 0)
1273 return isl_space_reset(dim, type);
1274
1275 if (!valid_dim_type(type))
1276 isl_die(dim->ctx, isl_error_invalid,
1277 "cannot drop dimensions of specified type", goto error);
1278
1279 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1280 dim = isl_space_cow(dim);
1281 if (!dim)
1282 goto error;
1283 if (dim->ids) {
1284 dim = extend_ids(dim);
1285 if (!dim)
1286 goto error;
1287 for (i = 0; i < num; ++i)
1288 isl_id_free(get_id(dim, type, first + i));
1289 for (i = first+num; i < n(dim, type); ++i)
1290 set_id(dim, type, i - num, get_id(dim, type, i));
1291 switch (type) {
1292 case isl_dim_param:
1293 get_ids(dim, isl_dim_in, 0, dim->n_in,
1294 dim->ids + offset(dim, isl_dim_in) - num);
1295 case isl_dim_in:
1296 get_ids(dim, isl_dim_out, 0, dim->n_out,
1297 dim->ids + offset(dim, isl_dim_out) - num);
1298 default:
1299 ;
1300 }
1301 dim->n_id -= num;
1302 }
1303 switch (type) {
1304 case isl_dim_param: dim->nparam -= num; break;
1305 case isl_dim_in: dim->n_in -= num; break;
1306 case isl_dim_out: dim->n_out -= num; break;
1307 default: ;
1308 }
1309 dim = isl_space_reset(dim, type);
1310 if (type == isl_dim_param) {
1311 if (dim && dim->nested[0] &&
1312 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1313 isl_dim_param, first, num)))
1314 goto error;
1315 if (dim && dim->nested[1] &&
1316 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1317 isl_dim_param, first, num)))
1318 goto error;
1319 }
1320 return dim;
1321 error:
1322 isl_space_free(dim);
1323 return NULL;
1324 }
1325
1326 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1327 unsigned first, unsigned n)
1328 {
1329 if (!dim)
1330 return NULL;
1331 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1332 }
1333
1334 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1335 unsigned first, unsigned n)
1336 {
1337 if (!dim)
1338 return NULL;
1339 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1340 }
1341
1342 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1343 {
1344 if (!dim)
1345 return NULL;
1346 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1347 dim = isl_space_reverse(dim);
1348 dim = mark_as_set(dim);
1349 return dim;
1350 }
1351
1352 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1353 {
1354 if (!dim)
1355 return NULL;
1356 if (!isl_space_is_set(dim))
1357 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1358 "not a set space", goto error);
1359 dim = isl_space_reverse(dim);
1360 dim = isl_space_reset(dim, isl_dim_out);
1361 return dim;
1362 error:
1363 isl_space_free(dim);
1364 return NULL;
1365 }
1366
1367 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1368 {
1369 if (!dim)
1370 return NULL;
1371 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1372 dim = mark_as_set(dim);
1373 return dim;
1374 }
1375
1376 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1377 {
1378 if (!dim)
1379 return NULL;
1380 if (!isl_space_is_set(dim))
1381 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1382 "not a set space", goto error);
1383 return isl_space_reset(dim, isl_dim_in);
1384 error:
1385 isl_space_free(dim);
1386 return NULL;
1387 }
1388
1389 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1390 {
1391 if (isl_space_is_params(space))
1392 return space;
1393 space = isl_space_drop_dims(space,
1394 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1395 space = isl_space_drop_dims(space,
1396 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1397 space = mark_as_params(space);
1398 return space;
1399 }
1400
1401 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1402 {
1403 if (!space)
1404 return NULL;
1405 if (!isl_space_is_params(space))
1406 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1407 "not a parameter space", goto error);
1408 return isl_space_reset(space, isl_dim_set);
1409 error:
1410 isl_space_free(space);
1411 return NULL;
1412 }
1413
1414 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1415 {
1416 dim = isl_space_cow(dim);
1417 if (!dim)
1418 return NULL;
1419
1420 dim->n_out += dim->n_in;
1421 dim->n_in = 0;
1422 dim = isl_space_reset(dim, isl_dim_in);
1423 dim = isl_space_reset(dim, isl_dim_out);
1424
1425 return dim;
1426 }
1427
1428 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1429 unsigned n_div)
1430 {
1431 int i;
1432
1433 if (!dim)
1434 return NULL;
1435 if (n_div == 0 &&
1436 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1437 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1438 dim = isl_space_cow(dim);
1439 if (!dim)
1440 return NULL;
1441 dim->n_out += dim->nparam + dim->n_in + n_div;
1442 dim->nparam = 0;
1443 dim->n_in = 0;
1444
1445 for (i = 0; i < dim->n_id; ++i)
1446 isl_id_free(get_id(dim, isl_dim_out, i));
1447 dim->n_id = 0;
1448 dim = isl_space_reset(dim, isl_dim_in);
1449 dim = isl_space_reset(dim, isl_dim_out);
1450
1451 return dim;
1452 }
1453
1454 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1455 {
1456 if (!dim1 || !dim2)
1457 return -1;
1458 if (dim1 == dim2)
1459 return 1;
1460 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1461 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1462 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1463 }
1464
1465 /* Is space1 equal to the domain of space2?
1466 */
1467 int isl_space_is_domain(__isl_keep isl_space *space1,
1468 __isl_keep isl_space *space2)
1469 {
1470 if (!space1 || !space2)
1471 return -1;
1472 if (!isl_space_is_set(space1))
1473 return 0;
1474 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1475 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1476 }
1477
1478 int isl_space_compatible(__isl_keep isl_space *dim1,
1479 __isl_keep isl_space *dim2)
1480 {
1481 return dim1->nparam == dim2->nparam &&
1482 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1483 }
1484
1485 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1486 {
1487 int i;
1488 isl_id *id;
1489
1490 if (!dim)
1491 return hash;
1492
1493 hash = isl_hash_builtin(hash, dim->nparam);
1494 hash = isl_hash_builtin(hash, dim->n_in);
1495 hash = isl_hash_builtin(hash, dim->n_out);
1496
1497 for (i = 0; i < dim->nparam; ++i) {
1498 id = get_id(dim, isl_dim_param, i);
1499 hash = isl_hash_id(hash, id);
1500 }
1501
1502 id = tuple_id(dim, isl_dim_in);
1503 hash = isl_hash_id(hash, id);
1504 id = tuple_id(dim, isl_dim_out);
1505 hash = isl_hash_id(hash, id);
1506
1507 hash = isl_hash_dim(hash, dim->nested[0]);
1508 hash = isl_hash_dim(hash, dim->nested[1]);
1509
1510 return hash;
1511 }
1512
1513 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1514 {
1515 uint32_t hash;
1516
1517 if (!dim)
1518 return 0;
1519
1520 hash = isl_hash_init();
1521 hash = isl_hash_dim(hash, dim);
1522
1523 return hash;
1524 }
1525
1526 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1527 {
1528 if (!dim)
1529 return -1;
1530
1531 if (!isl_space_is_set(dim))
1532 return 0;
1533
1534 return dim->nested[1] != NULL;
1535 }
1536
1537 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1538 {
1539 isl_space *wrap;
1540
1541 if (!dim)
1542 return NULL;
1543
1544 wrap = isl_space_set_alloc(dim->ctx,
1545 dim->nparam, dim->n_in + dim->n_out);
1546
1547 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1548 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1549 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1550
1551 if (!wrap)
1552 goto error;
1553
1554 wrap->nested[1] = dim;
1555
1556 return wrap;
1557 error:
1558 isl_space_free(dim);
1559 return NULL;
1560 }
1561
1562 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1563 {
1564 isl_space *unwrap;
1565
1566 if (!dim)
1567 return NULL;
1568
1569 if (!isl_space_is_wrapping(dim))
1570 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1571 goto error);
1572
1573 unwrap = isl_space_copy(dim->nested[1]);
1574 isl_space_free(dim);
1575
1576 return unwrap;
1577 error:
1578 isl_space_free(dim);
1579 return NULL;
1580 }
1581
1582 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1583 {
1584 if (type != isl_dim_in && type != isl_dim_out)
1585 return 0;
1586 if (!dim)
1587 return -1;
1588 if (dim->tuple_id[type - isl_dim_in])
1589 return 1;
1590 if (dim->nested[type - isl_dim_in])
1591 return 1;
1592 return 0;
1593 }
1594
1595 int isl_space_may_be_set(__isl_keep isl_space *dim)
1596 {
1597 if (!dim)
1598 return -1;
1599 if (isl_space_is_set(dim))
1600 return 1;
1601 if (isl_space_dim(dim, isl_dim_in) != 0)
1602 return 0;
1603 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1604 return 0;
1605 return 1;
1606 }
1607
1608 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1609 enum isl_dim_type type)
1610 {
1611 if (!isl_space_is_named_or_nested(dim, type))
1612 return dim;
1613
1614 dim = isl_space_cow(dim);
1615 if (!dim)
1616 return NULL;
1617
1618 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1619 dim->tuple_id[type - isl_dim_in] = NULL;
1620 isl_space_free(dim->nested[type - isl_dim_in]);
1621 dim->nested[type - isl_dim_in] = NULL;
1622
1623 return dim;
1624 }
1625
1626 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1627 {
1628 if (!dim)
1629 return NULL;
1630 if (!dim->nested[0] && !dim->nested[1])
1631 return dim;
1632
1633 if (dim->nested[0])
1634 dim = isl_space_reset(dim, isl_dim_in);
1635 if (dim && dim->nested[1])
1636 dim = isl_space_reset(dim, isl_dim_out);
1637
1638 return dim;
1639 }
1640
1641 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1642 {
1643 if (!dim)
1644 return NULL;
1645 if (!dim->nested[0])
1646 return dim;
1647
1648 return isl_space_reset(dim, isl_dim_in);
1649 }
1650
1651 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1652 {
1653 if (!dim)
1654 return NULL;
1655 if (!dim->nested[1])
1656 return dim;
1657
1658 return isl_space_reset(dim, isl_dim_out);
1659 }
1660
1661 /* Replace the dimensions of the given type of dst by those of src.
1662 */
1663 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1664 enum isl_dim_type type, __isl_keep isl_space *src)
1665 {
1666 dst = isl_space_cow(dst);
1667
1668 if (!dst || !src)
1669 goto error;
1670
1671 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1672 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1673 dst = copy_ids(dst, type, 0, src, type);
1674
1675 if (dst && type == isl_dim_param) {
1676 int i;
1677 for (i = 0; i <= 1; ++i) {
1678 if (!dst->nested[i])
1679 continue;
1680 dst->nested[i] = isl_space_replace(dst->nested[i],
1681 type, src);
1682 if (!dst->nested[i])
1683 goto error;
1684 }
1685 }
1686
1687 return dst;
1688 error:
1689 isl_space_free(dst);
1690 return NULL;
1691 }
1692
1693 /* Given a dimension specification "dim" of a set, create a dimension
1694 * specification for the lift of the set. In particular, the result
1695 * is of the form [dim -> local[..]], with n_local variables in the
1696 * range of the wrapped map.
1697 */
1698 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1699 {
1700 isl_space *local_dim;
1701
1702 if (!dim)
1703 return NULL;
1704
1705 local_dim = isl_space_dup(dim);
1706 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1707 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1708 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1709 dim = isl_space_join(isl_space_from_domain(dim),
1710 isl_space_from_range(local_dim));
1711 dim = isl_space_wrap(dim);
1712 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1713
1714 return dim;
1715 }
1716
1717 int isl_space_can_zip(__isl_keep isl_space *dim)
1718 {
1719 if (!dim)
1720 return -1;
1721
1722 return dim->nested[0] && dim->nested[1];
1723 }
1724
1725 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1726 {
1727 isl_space *dom, *ran;
1728 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1729
1730 if (!isl_space_can_zip(dim))
1731 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1732 goto error);
1733
1734 if (!dim)
1735 return NULL;
1736 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1737 ran = isl_space_unwrap(isl_space_range(dim));
1738 dom_dom = isl_space_domain(isl_space_copy(dom));
1739 dom_ran = isl_space_range(dom);
1740 ran_dom = isl_space_domain(isl_space_copy(ran));
1741 ran_ran = isl_space_range(ran);
1742 dom = isl_space_join(isl_space_from_domain(dom_dom),
1743 isl_space_from_range(ran_dom));
1744 ran = isl_space_join(isl_space_from_domain(dom_ran),
1745 isl_space_from_range(ran_ran));
1746 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1747 isl_space_from_range(isl_space_wrap(ran)));
1748 error:
1749 isl_space_free(dim);
1750 return NULL;
1751 }
1752
1753 /* Can we apply isl_space_curry to "space"?
1754 * That is, does it have a nested relation in its domain?
1755 */
1756 int isl_space_can_curry(__isl_keep isl_space *space)
1757 {
1758 if (!space)
1759 return -1;
1760
1761 return !!space->nested[0];
1762 }
1763
1764 /* Given a space (A -> B) -> C, return the corresponding space
1765 * A -> (B -> C).
1766 */
1767 __isl_give isl_space *isl_space_curry(__isl_take isl_space *space)
1768 {
1769 isl_space *dom, *ran;
1770 isl_space *dom_dom, *dom_ran;
1771
1772 if (!space)
1773 return NULL;
1774
1775 if (!isl_space_can_curry(space))
1776 isl_die(space->ctx, isl_error_invalid,
1777 "space cannot be curried", goto error);
1778
1779 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(space)));
1780 ran = isl_space_range(space);
1781 dom_dom = isl_space_domain(isl_space_copy(dom));
1782 dom_ran = isl_space_range(dom);
1783 ran = isl_space_join(isl_space_from_domain(dom_ran),
1784 isl_space_from_range(ran));
1785 return isl_space_join(isl_space_from_domain(dom_dom),
1786 isl_space_from_range(isl_space_wrap(ran)));
1787 error:
1788 isl_space_free(space);
1789 return NULL;
1790 }
1791
1792 int isl_space_has_named_params(__isl_keep isl_space *dim)
1793 {
1794 int i;
1795 unsigned off;
1796
1797 if (!dim)
1798 return -1;
1799 if (dim->nparam == 0)
1800 return 1;
1801 off = isl_space_offset(dim, isl_dim_param);
1802 if (off + dim->nparam > dim->n_id)
1803 return 0;
1804 for (i = 0; i < dim->nparam; ++i)
1805 if (!dim->ids[off + i])
1806 return 0;
1807 return 1;
1808 }
1809
1810 /* Align the initial parameters of dim1 to match the order in dim2.
1811 */
1812 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
1813 __isl_take isl_space *dim2)
1814 {
1815 isl_reordering *exp;
1816
1817 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
1818 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
1819 "parameter alignment requires named parameters",
1820 goto error);
1821
1822 dim2 = isl_space_params(dim2);
1823 exp = isl_parameter_alignment_reordering(dim1, dim2);
1824 exp = isl_reordering_extend_space(exp, dim1);
1825 isl_space_free(dim2);
1826 if (!exp)
1827 return NULL;
1828 dim1 = isl_space_copy(exp->dim);
1829 isl_reordering_free(exp);
1830 return dim1;
1831 error:
1832 isl_space_free(dim1);
1833 isl_space_free(dim2);
1834 return NULL;
1835 }
1836
1837 /* Given the space of set (domain), construct a space for a map
1838 * with as domain the given space and as range the range of "model".
1839 */
1840 __isl_give isl_space *isl_space_extend_domain_with_range(
1841 __isl_take isl_space *domain, __isl_take isl_space *model)
1842 {
1843 isl_space *space;
1844
1845 space = isl_space_from_domain(domain);
1846 space = isl_space_add_dims(space, isl_dim_out,
1847 isl_space_dim(model, isl_dim_out));
1848 if (isl_space_has_tuple_id(model, isl_dim_out))
1849 space = isl_space_set_tuple_id(space, isl_dim_out,
1850 isl_space_get_tuple_id(model, isl_dim_out));
1851 isl_space_free(model);
1852 return space;
1853 }
Integer set library