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Merge branch 'maint'
[isl.git] / isl_space.c
blob6a6b5f506b08323e05b6669950c05dcfce584216
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 static int name_ok(isl_ctx *ctx, const char *s)
351 {
352 char *p;
353 long dummy;
354
355 dummy = strtol(s, &p, 0);
356 if (p != s)
357 isl_die(ctx, isl_error_invalid, "name looks like a number",
358 return 0);
359
360 return 1;
361 }
362
363 int isl_space_has_tuple_id(__isl_keep isl_space *dim, enum isl_dim_type type)
364 {
365 if (!dim)
366 return -1;
367 if (isl_space_is_params(dim))
368 isl_die(dim->ctx, isl_error_invalid,
369 "parameter spaces don't have tuple ids", return -1);
370 if (isl_space_is_set(dim) && type != isl_dim_set)
371 isl_die(dim->ctx, isl_error_invalid,
372 "set spaces can only have a set id", return -1);
373 if (type != isl_dim_in && type != isl_dim_out)
374 isl_die(dim->ctx, isl_error_invalid,
375 "only input, output and set tuples can have ids",
376 return -1);
377 return dim->tuple_id[type - isl_dim_in] != NULL;
378 }
379
380 __isl_give isl_id *isl_space_get_tuple_id(__isl_keep isl_space *dim,
381 enum isl_dim_type type)
382 {
383 int has_id;
384
385 if (!dim)
386 return NULL;
387 has_id = isl_space_has_tuple_id(dim, type);
388 if (has_id < 0)
389 return NULL;
390 if (!has_id)
391 isl_die(dim->ctx, isl_error_invalid,
392 "tuple has no id", return NULL);
393 return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
394 }
395
396 __isl_give isl_space *isl_space_set_tuple_id(__isl_take isl_space *dim,
397 enum isl_dim_type type, __isl_take isl_id *id)
398 {
399 dim = isl_space_cow(dim);
400 if (!dim || !id)
401 goto error;
402 if (type != isl_dim_in && type != isl_dim_out)
403 isl_die(dim->ctx, isl_error_invalid,
404 "only input, output and set tuples can have names",
405 goto error);
406
407 isl_id_free(dim->tuple_id[type - isl_dim_in]);
408 dim->tuple_id[type - isl_dim_in] = id;
409
410 return dim;
411 error:
412 isl_id_free(id);
413 isl_space_free(dim);
414 return NULL;
415 }
416
417 __isl_give isl_space *isl_space_reset_tuple_id(__isl_take isl_space *dim,
418 enum isl_dim_type type)
419 {
420 dim = isl_space_cow(dim);
421 if (!dim)
422 return NULL;
423 if (type != isl_dim_in && type != isl_dim_out)
424 isl_die(dim->ctx, isl_error_invalid,
425 "only input, output and set tuples can have names",
426 goto error);
427
428 isl_id_free(dim->tuple_id[type - isl_dim_in]);
429 dim->tuple_id[type - isl_dim_in] = NULL;
430
431 return dim;
432 error:
433 isl_space_free(dim);
434 return NULL;
435 }
436
437 /* Set the id of the given dimension of "space" to "id".
438 * If the dimension already has an id, then it is replaced.
439 * If the dimension is a parameter, then we need to change it
440 * in the nested spaces (if any) as well.
441 */
442 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *space,
443 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
444 {
445 space = isl_space_cow(space);
446 if (!space || !id)
447 goto error;
448
449 if (type == isl_dim_param) {
450 int i;
451
452 for (i = 0; i < 2; ++i) {
453 if (!space->nested[i])
454 continue;
455 space->nested[i] =
456 isl_space_set_dim_id(space->nested[i],
457 type, pos, isl_id_copy(id));
458 if (!space->nested[i])
459 goto error;
460 }
461 }
462
463 isl_id_free(get_id(space, type, pos));
464 return set_id(space, type, pos, id);
465 error:
466 isl_id_free(id);
467 isl_space_free(space);
468 return NULL;
469 }
470
471 int isl_space_has_dim_id(__isl_keep isl_space *dim,
472 enum isl_dim_type type, unsigned pos)
473 {
474 if (!dim)
475 return -1;
476 return get_id(dim, type, pos) != NULL;
477 }
478
479 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
480 enum isl_dim_type type, unsigned pos)
481 {
482 if (!dim)
483 return NULL;
484 if (!get_id(dim, type, pos))
485 isl_die(dim->ctx, isl_error_invalid,
486 "dim has no id", return NULL);
487 return isl_id_copy(get_id(dim, type, pos));
488 }
489
490 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
491 enum isl_dim_type type, const char *s)
492 {
493 isl_id *id;
494
495 if (!dim)
496 return NULL;
497
498 if (!s)
499 return isl_space_reset_tuple_id(dim, type);
500
501 if (!name_ok(dim->ctx, s))
502 goto error;
503
504 id = isl_id_alloc(dim->ctx, s, NULL);
505 return isl_space_set_tuple_id(dim, type, id);
506 error:
507 isl_space_free(dim);
508 return NULL;
509 }
510
511 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
512 enum isl_dim_type type)
513 {
514 isl_id *id;
515 if (!dim)
516 return NULL;
517 if (type != isl_dim_in && type != isl_dim_out)
518 return NULL;
519 id = dim->tuple_id[type - isl_dim_in];
520 return id ? id->name : NULL;
521 }
522
523 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
524 enum isl_dim_type type, unsigned pos,
525 const char *s)
526 {
527 isl_id *id;
528
529 if (!dim)
530 return NULL;
531 if (!name_ok(dim->ctx, s))
532 goto error;
533 id = isl_id_alloc(dim->ctx, s, NULL);
534 return isl_space_set_dim_id(dim, type, pos, id);
535 error:
536 isl_space_free(dim);
537 return NULL;
538 }
539
540 /* Does the given dimension have a name?
541 */
542 int isl_space_has_dim_name(__isl_keep isl_space *space,
543 enum isl_dim_type type, unsigned pos)
544 {
545 isl_id *id;
546
547 if (!space)
548 return -1;
549 id = get_id(space, type, pos);
550 return id && id->name;
551 }
552
553 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
554 enum isl_dim_type type, unsigned pos)
555 {
556 isl_id *id = get_id(dim, type, pos);
557 return id ? id->name : NULL;
558 }
559
560 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
561 __isl_keep isl_id *id)
562 {
563 int i;
564 int offset;
565 int n;
566
567 if (!dim || !id)
568 return -1;
569
570 offset = isl_space_offset(dim, type);
571 n = isl_space_dim(dim, type);
572 for (i = 0; i < n && offset + i < dim->n_id; ++i)
573 if (dim->ids[offset + i] == id)
574 return i;
575
576 return -1;
577 }
578
579 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
580 enum isl_dim_type type, const char *name)
581 {
582 int i;
583 int offset;
584 int n;
585
586 if (!space || !name)
587 return -1;
588
589 offset = isl_space_offset(space, type);
590 n = isl_space_dim(space, type);
591 for (i = 0; i < n && offset + i < space->n_id; ++i)
592 if (space->ids[offset + i]->name &&
593 !strcmp(space->ids[offset + i]->name, name))
594 return i;
595
596 return -1;
597 }
598
599 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
600 enum isl_dim_type type)
601 {
602 if (!dim)
603 return NULL;
604 if (type == isl_dim_in)
605 return dim->tuple_id[0];
606 if (type == isl_dim_out)
607 return dim->tuple_id[1];
608 return NULL;
609 }
610
611 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
612 enum isl_dim_type type)
613 {
614 if (!dim)
615 return NULL;
616 if (type == isl_dim_in)
617 return dim->nested[0];
618 if (type == isl_dim_out)
619 return dim->nested[1];
620 return NULL;
621 }
622
623 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
624 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
625 {
626 isl_id *id1, *id2;
627 isl_space *nested1, *nested2;
628
629 if (!dim1 || !dim2)
630 return -1;
631
632 if (dim1 == dim2 && dim1_type == dim2_type)
633 return 1;
634
635 if (n(dim1, dim1_type) != n(dim2, dim2_type))
636 return 0;
637 id1 = tuple_id(dim1, dim1_type);
638 id2 = tuple_id(dim2, dim2_type);
639 if (!id1 ^ !id2)
640 return 0;
641 if (id1 && id1 != id2)
642 return 0;
643 nested1 = nested(dim1, dim1_type);
644 nested2 = nested(dim2, dim2_type);
645 if (!nested1 ^ !nested2)
646 return 0;
647 if (nested1 && !isl_space_is_equal(nested1, nested2))
648 return 0;
649 return 1;
650 }
651
652 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
653 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
654 {
655 int i;
656
657 if (dim1 == dim2 && dim1_type == dim2_type)
658 return 1;
659
660 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
661 return 0;
662
663 if (!dim1->ids && !dim2->ids)
664 return 1;
665
666 for (i = 0; i < n(dim1, dim1_type); ++i) {
667 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
668 return 0;
669 }
670 return 1;
671 }
672
673 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
674 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
675 {
676 if (!dim1 || !dim2)
677 return -1;
678
679 return match(dim1, dim1_type, dim2, dim2_type);
680 }
681
682 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
683 unsigned first, unsigned n, __isl_keep isl_id **ids)
684 {
685 int i;
686
687 for (i = 0; i < n ; ++i)
688 ids[i] = get_id(dim, type, first + i);
689 }
690
691 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
692 unsigned nparam, unsigned n_in, unsigned n_out)
693 {
694 isl_id **ids = NULL;
695
696 if (!dim)
697 return NULL;
698 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
699 return dim;
700
701 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
702 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
703 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
704
705 dim = isl_space_cow(dim);
706
707 if (dim->ids) {
708 ids = isl_calloc_array(dim->ctx, isl_id *,
709 nparam + n_in + n_out);
710 if (!ids)
711 goto error;
712 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
713 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
714 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
715 free(dim->ids);
716 dim->ids = ids;
717 dim->n_id = nparam + n_in + n_out;
718 }
719 dim->nparam = nparam;
720 dim->n_in = n_in;
721 dim->n_out = n_out;
722
723 return dim;
724 error:
725 free(ids);
726 isl_space_free(dim);
727 return NULL;
728 }
729
730 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
731 enum isl_dim_type type, unsigned n)
732 {
733 if (!dim)
734 return NULL;
735 dim = isl_space_reset(dim, type);
736 switch (type) {
737 case isl_dim_param:
738 dim = isl_space_extend(dim,
739 dim->nparam + n, dim->n_in, dim->n_out);
740 if (dim && dim->nested[0] &&
741 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
742 isl_dim_param, n)))
743 goto error;
744 if (dim && dim->nested[1] &&
745 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
746 isl_dim_param, n)))
747 goto error;
748 return dim;
749 case isl_dim_in:
750 return isl_space_extend(dim,
751 dim->nparam, dim->n_in + n, dim->n_out);
752 case isl_dim_out:
753 return isl_space_extend(dim,
754 dim->nparam, dim->n_in, dim->n_out + n);
755 default:
756 isl_die(dim->ctx, isl_error_invalid,
757 "cannot add dimensions of specified type", goto error);
758 }
759 error:
760 isl_space_free(dim);
761 return NULL;
762 }
763
764 static int valid_dim_type(enum isl_dim_type type)
765 {
766 switch (type) {
767 case isl_dim_param:
768 case isl_dim_in:
769 case isl_dim_out:
770 return 1;
771 default:
772 return 0;
773 }
774 }
775
776 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
777 enum isl_dim_type type, unsigned pos, unsigned n)
778 {
779 isl_id **ids = NULL;
780
781 if (!dim)
782 return NULL;
783 if (n == 0)
784 return isl_space_reset(dim, type);
785
786 if (!valid_dim_type(type))
787 isl_die(dim->ctx, isl_error_invalid,
788 "cannot insert dimensions of specified type",
789 goto error);
790
791 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
792
793 dim = isl_space_cow(dim);
794 if (!dim)
795 return NULL;
796
797 if (dim->ids) {
798 enum isl_dim_type t;
799 int off;
800 int s[3];
801 int *size = s - isl_dim_param;
802 ids = isl_calloc_array(dim->ctx, isl_id *,
803 dim->nparam + dim->n_in + dim->n_out + n);
804 if (!ids)
805 goto error;
806 off = 0;
807 size[isl_dim_param] = dim->nparam;
808 size[isl_dim_in] = dim->n_in;
809 size[isl_dim_out] = dim->n_out;
810 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
811 if (t != type) {
812 get_ids(dim, t, 0, size[t], ids + off);
813 off += size[t];
814 } else {
815 get_ids(dim, t, 0, pos, ids + off);
816 off += pos + n;
817 get_ids(dim, t, pos, size[t] - pos, ids + off);
818 off += size[t] - pos;
819 }
820 }
821 free(dim->ids);
822 dim->ids = ids;
823 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
824 }
825 switch (type) {
826 case isl_dim_param: dim->nparam += n; break;
827 case isl_dim_in: dim->n_in += n; break;
828 case isl_dim_out: dim->n_out += n; break;
829 default: ;
830 }
831 dim = isl_space_reset(dim, type);
832
833 return dim;
834 error:
835 isl_space_free(dim);
836 return NULL;
837 }
838
839 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
840 enum isl_dim_type dst_type, unsigned dst_pos,
841 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
842 {
843 int i;
844
845 if (!dim)
846 return NULL;
847 if (n == 0)
848 return dim;
849
850 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
851 goto error);
852
853 if (dst_type == src_type && dst_pos == src_pos)
854 return dim;
855
856 isl_assert(dim->ctx, dst_type != src_type, goto error);
857
858 dim = isl_space_reset(dim, src_type);
859 dim = isl_space_reset(dim, dst_type);
860
861 dim = isl_space_cow(dim);
862 if (!dim)
863 return NULL;
864
865 if (dim->ids) {
866 isl_id **ids;
867 enum isl_dim_type t;
868 int off;
869 int s[3];
870 int *size = s - isl_dim_param;
871 ids = isl_calloc_array(dim->ctx, isl_id *,
872 dim->nparam + dim->n_in + dim->n_out);
873 if (!ids)
874 goto error;
875 off = 0;
876 size[isl_dim_param] = dim->nparam;
877 size[isl_dim_in] = dim->n_in;
878 size[isl_dim_out] = dim->n_out;
879 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
880 if (t == dst_type) {
881 get_ids(dim, t, 0, dst_pos, ids + off);
882 off += dst_pos;
883 get_ids(dim, src_type, src_pos, n, ids + off);
884 off += n;
885 get_ids(dim, t, dst_pos, size[t] - dst_pos,
886 ids + off);
887 off += size[t] - dst_pos;
888 } else if (t == src_type) {
889 get_ids(dim, t, 0, src_pos, ids + off);
890 off += src_pos;
891 get_ids(dim, t, src_pos + n,
892 size[t] - src_pos - n, ids + off);
893 off += size[t] - src_pos - n;
894 } else {
895 get_ids(dim, t, 0, size[t], ids + off);
896 off += size[t];
897 }
898 }
899 free(dim->ids);
900 dim->ids = ids;
901 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
902 }
903
904 switch (dst_type) {
905 case isl_dim_param: dim->nparam += n; break;
906 case isl_dim_in: dim->n_in += n; break;
907 case isl_dim_out: dim->n_out += n; break;
908 default: ;
909 }
910
911 switch (src_type) {
912 case isl_dim_param: dim->nparam -= n; break;
913 case isl_dim_in: dim->n_in -= n; break;
914 case isl_dim_out: dim->n_out -= n; break;
915 default: ;
916 }
917
918 if (dst_type != isl_dim_param && src_type != isl_dim_param)
919 return dim;
920
921 for (i = 0; i < 2; ++i) {
922 if (!dim->nested[i])
923 continue;
924 dim->nested[i] = isl_space_replace(dim->nested[i],
925 isl_dim_param, dim);
926 if (!dim->nested[i])
927 goto error;
928 }
929
930 return dim;
931 error:
932 isl_space_free(dim);
933 return NULL;
934 }
935
936 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
937 __isl_take isl_space *right)
938 {
939 isl_space *dim;
940
941 if (!left || !right)
942 goto error;
943
944 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
945 goto error);
946 isl_assert(left->ctx,
947 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
948 goto error);
949
950 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
951 if (!dim)
952 goto error;
953
954 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
955 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
956 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
957
958 if (dim && left->tuple_id[0] &&
959 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
960 goto error;
961 if (dim && right->tuple_id[1] &&
962 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
963 goto error;
964 if (dim && left->nested[0] &&
965 !(dim->nested[0] = isl_space_copy(left->nested[0])))
966 goto error;
967 if (dim && right->nested[1] &&
968 !(dim->nested[1] = isl_space_copy(right->nested[1])))
969 goto error;
970
971 isl_space_free(left);
972 isl_space_free(right);
973
974 return dim;
975 error:
976 isl_space_free(left);
977 isl_space_free(right);
978 return NULL;
979 }
980
981 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
982 __isl_take isl_space *right)
983 {
984 isl_space *dom1, *dom2, *nest1, *nest2;
985
986 if (!left || !right)
987 goto error;
988
989 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
990 goto error);
991
992 dom1 = isl_space_domain(isl_space_copy(left));
993 dom2 = isl_space_domain(isl_space_copy(right));
994 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
995
996 dom1 = isl_space_range(left);
997 dom2 = isl_space_range(right);
998 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
999
1000 return isl_space_join(isl_space_reverse(nest1), nest2);
1001 error:
1002 isl_space_free(left);
1003 isl_space_free(right);
1004 return NULL;
1005 }
1006
1007 /* Given two spaces { A -> C } and { B -> C }, construct the space
1008 * { [A -> B] -> C }
1009 */
1010 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1011 __isl_take isl_space *right)
1012 {
1013 isl_space *ran, *dom1, *dom2, *nest;
1014
1015 if (!left || !right)
1016 goto error;
1017
1018 if (!match(left, isl_dim_param, right, isl_dim_param))
1019 isl_die(left->ctx, isl_error_invalid,
1020 "parameters need to match", goto error);
1021 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
1022 isl_die(left->ctx, isl_error_invalid,
1023 "ranges need to match", goto error);
1024
1025 ran = isl_space_range(isl_space_copy(left));
1026
1027 dom1 = isl_space_domain(left);
1028 dom2 = isl_space_domain(right);
1029 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1030
1031 return isl_space_join(isl_space_reverse(nest), ran);
1032 error:
1033 isl_space_free(left);
1034 isl_space_free(right);
1035 return NULL;
1036 }
1037
1038 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1039 __isl_take isl_space *right)
1040 {
1041 isl_space *dom, *ran1, *ran2, *nest;
1042
1043 if (!left || !right)
1044 goto error;
1045
1046 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1047 goto error);
1048 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1049 isl_die(left->ctx, isl_error_invalid,
1050 "domains need to match", goto error);
1051
1052 dom = isl_space_domain(isl_space_copy(left));
1053
1054 ran1 = isl_space_range(left);
1055 ran2 = isl_space_range(right);
1056 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1057
1058 return isl_space_join(isl_space_reverse(dom), nest);
1059 error:
1060 isl_space_free(left);
1061 isl_space_free(right);
1062 return NULL;
1063 }
1064
1065 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1066 {
1067 isl_ctx *ctx;
1068 isl_id **ids = NULL;
1069
1070 if (!dim)
1071 return NULL;
1072 ctx = isl_space_get_ctx(dim);
1073 if (!isl_space_is_set(dim))
1074 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1075 dim = isl_space_cow(dim);
1076 if (!dim)
1077 return NULL;
1078 if (dim->ids) {
1079 ids = isl_calloc_array(dim->ctx, isl_id *,
1080 dim->nparam + dim->n_out + dim->n_out);
1081 if (!ids)
1082 goto error;
1083 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1084 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1085 }
1086 dim->n_in = dim->n_out;
1087 if (ids) {
1088 free(dim->ids);
1089 dim->ids = ids;
1090 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1091 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1092 }
1093 isl_id_free(dim->tuple_id[0]);
1094 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1095 isl_space_free(dim->nested[0]);
1096 dim->nested[0] = isl_space_copy(dim->nested[1]);
1097 return dim;
1098 error:
1099 isl_space_free(dim);
1100 return NULL;
1101 }
1102
1103 __isl_give isl_space *isl_space_map_from_domain_and_range(
1104 __isl_take isl_space *domain, __isl_take isl_space *range)
1105 {
1106 if (!domain || !range)
1107 goto error;
1108 if (!isl_space_is_set(domain))
1109 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1110 "domain is not a set space", goto error);
1111 if (!isl_space_is_set(range))
1112 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1113 "range is not a set space", goto error);
1114 return isl_space_join(isl_space_reverse(domain), range);
1115 error:
1116 isl_space_free(domain);
1117 isl_space_free(range);
1118 return NULL;
1119 }
1120
1121 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1122 enum isl_dim_type type,
1123 unsigned first, unsigned n, __isl_take isl_id **ids)
1124 {
1125 int i;
1126
1127 for (i = 0; i < n ; ++i)
1128 dim = set_id(dim, type, first + i, ids[i]);
1129
1130 return dim;
1131 }
1132
1133 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1134 {
1135 unsigned t;
1136 isl_space *nested;
1137 isl_id **ids = NULL;
1138 isl_id *id;
1139
1140 if (!dim)
1141 return NULL;
1142 if (match(dim, isl_dim_in, dim, isl_dim_out))
1143 return dim;
1144
1145 dim = isl_space_cow(dim);
1146 if (!dim)
1147 return NULL;
1148
1149 id = dim->tuple_id[0];
1150 dim->tuple_id[0] = dim->tuple_id[1];
1151 dim->tuple_id[1] = id;
1152
1153 nested = dim->nested[0];
1154 dim->nested[0] = dim->nested[1];
1155 dim->nested[1] = nested;
1156
1157 if (dim->ids) {
1158 ids = isl_alloc_array(dim->ctx, isl_id *,
1159 dim->n_in + dim->n_out);
1160 if (!ids)
1161 goto error;
1162 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1163 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1164 }
1165
1166 t = dim->n_in;
1167 dim->n_in = dim->n_out;
1168 dim->n_out = t;
1169
1170 if (dim->ids) {
1171 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1172 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1173 free(ids);
1174 }
1175
1176 return dim;
1177 error:
1178 free(ids);
1179 isl_space_free(dim);
1180 return NULL;
1181 }
1182
1183 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1184 enum isl_dim_type type, unsigned first, unsigned num)
1185 {
1186 int i;
1187
1188 if (!dim)
1189 return NULL;
1190
1191 if (num == 0)
1192 return isl_space_reset(dim, type);
1193
1194 if (!valid_dim_type(type))
1195 isl_die(dim->ctx, isl_error_invalid,
1196 "cannot drop dimensions of specified type", goto error);
1197
1198 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1199 dim = isl_space_cow(dim);
1200 if (!dim)
1201 goto error;
1202 if (dim->ids) {
1203 dim = extend_ids(dim);
1204 if (!dim)
1205 goto error;
1206 for (i = 0; i < num; ++i)
1207 isl_id_free(get_id(dim, type, first + i));
1208 for (i = first+num; i < n(dim, type); ++i)
1209 set_id(dim, type, i - num, get_id(dim, type, i));
1210 switch (type) {
1211 case isl_dim_param:
1212 get_ids(dim, isl_dim_in, 0, dim->n_in,
1213 dim->ids + offset(dim, isl_dim_in) - num);
1214 case isl_dim_in:
1215 get_ids(dim, isl_dim_out, 0, dim->n_out,
1216 dim->ids + offset(dim, isl_dim_out) - num);
1217 default:
1218 ;
1219 }
1220 dim->n_id -= num;
1221 }
1222 switch (type) {
1223 case isl_dim_param: dim->nparam -= num; break;
1224 case isl_dim_in: dim->n_in -= num; break;
1225 case isl_dim_out: dim->n_out -= num; break;
1226 default: ;
1227 }
1228 dim = isl_space_reset(dim, type);
1229 if (type == isl_dim_param) {
1230 if (dim && dim->nested[0] &&
1231 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1232 isl_dim_param, first, num)))
1233 goto error;
1234 if (dim && dim->nested[1] &&
1235 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1236 isl_dim_param, first, num)))
1237 goto error;
1238 }
1239 return dim;
1240 error:
1241 isl_space_free(dim);
1242 return NULL;
1243 }
1244
1245 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1246 unsigned first, unsigned n)
1247 {
1248 if (!dim)
1249 return NULL;
1250 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1251 }
1252
1253 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1254 unsigned first, unsigned n)
1255 {
1256 if (!dim)
1257 return NULL;
1258 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1259 }
1260
1261 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1262 {
1263 if (!dim)
1264 return NULL;
1265 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1266 dim = isl_space_reverse(dim);
1267 dim = mark_as_set(dim);
1268 return dim;
1269 }
1270
1271 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1272 {
1273 if (!dim)
1274 return NULL;
1275 if (!isl_space_is_set(dim))
1276 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1277 "not a set space", goto error);
1278 dim = isl_space_reverse(dim);
1279 dim = isl_space_reset(dim, isl_dim_out);
1280 return dim;
1281 error:
1282 isl_space_free(dim);
1283 return NULL;
1284 }
1285
1286 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1287 {
1288 if (!dim)
1289 return NULL;
1290 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1291 dim = mark_as_set(dim);
1292 return dim;
1293 }
1294
1295 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1296 {
1297 if (!dim)
1298 return NULL;
1299 if (!isl_space_is_set(dim))
1300 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1301 "not a set space", goto error);
1302 return isl_space_reset(dim, isl_dim_in);
1303 error:
1304 isl_space_free(dim);
1305 return NULL;
1306 }
1307
1308 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1309 {
1310 if (isl_space_is_params(space))
1311 return space;
1312 space = isl_space_drop_dims(space,
1313 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1314 space = isl_space_drop_dims(space,
1315 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1316 space = mark_as_params(space);
1317 return space;
1318 }
1319
1320 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1321 {
1322 if (!space)
1323 return NULL;
1324 if (!isl_space_is_params(space))
1325 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1326 "not a parameter space", goto error);
1327 return isl_space_reset(space, isl_dim_set);
1328 error:
1329 isl_space_free(space);
1330 return NULL;
1331 }
1332
1333 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1334 {
1335 dim = isl_space_cow(dim);
1336 if (!dim)
1337 return NULL;
1338
1339 dim->n_out += dim->n_in;
1340 dim->n_in = 0;
1341 dim = isl_space_reset(dim, isl_dim_in);
1342 dim = isl_space_reset(dim, isl_dim_out);
1343
1344 return dim;
1345 }
1346
1347 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1348 unsigned n_div)
1349 {
1350 int i;
1351
1352 if (!dim)
1353 return NULL;
1354 if (n_div == 0 &&
1355 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1356 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1357 dim = isl_space_cow(dim);
1358 if (!dim)
1359 return NULL;
1360 dim->n_out += dim->nparam + dim->n_in + n_div;
1361 dim->nparam = 0;
1362 dim->n_in = 0;
1363
1364 for (i = 0; i < dim->n_id; ++i)
1365 isl_id_free(get_id(dim, isl_dim_out, i));
1366 dim->n_id = 0;
1367 dim = isl_space_reset(dim, isl_dim_in);
1368 dim = isl_space_reset(dim, isl_dim_out);
1369
1370 return dim;
1371 }
1372
1373 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1374 {
1375 if (!dim1 || !dim2)
1376 return -1;
1377 if (dim1 == dim2)
1378 return 1;
1379 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1380 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1381 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1382 }
1383
1384 /* Is space1 equal to the domain of space2?
1385 */
1386 int isl_space_is_domain(__isl_keep isl_space *space1,
1387 __isl_keep isl_space *space2)
1388 {
1389 if (!space1 || !space2)
1390 return -1;
1391 if (!isl_space_is_set(space1))
1392 return 0;
1393 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1394 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1395 }
1396
1397 int isl_space_compatible(__isl_keep isl_space *dim1,
1398 __isl_keep isl_space *dim2)
1399 {
1400 return dim1->nparam == dim2->nparam &&
1401 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1402 }
1403
1404 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1405 {
1406 int i;
1407 isl_id *id;
1408
1409 if (!dim)
1410 return hash;
1411
1412 hash = isl_hash_builtin(hash, dim->nparam);
1413 hash = isl_hash_builtin(hash, dim->n_in);
1414 hash = isl_hash_builtin(hash, dim->n_out);
1415
1416 for (i = 0; i < dim->nparam; ++i) {
1417 id = get_id(dim, isl_dim_param, i);
1418 hash = isl_hash_id(hash, id);
1419 }
1420
1421 id = tuple_id(dim, isl_dim_in);
1422 hash = isl_hash_id(hash, id);
1423 id = tuple_id(dim, isl_dim_out);
1424 hash = isl_hash_id(hash, id);
1425
1426 hash = isl_hash_dim(hash, dim->nested[0]);
1427 hash = isl_hash_dim(hash, dim->nested[1]);
1428
1429 return hash;
1430 }
1431
1432 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1433 {
1434 uint32_t hash;
1435
1436 if (!dim)
1437 return 0;
1438
1439 hash = isl_hash_init();
1440 hash = isl_hash_dim(hash, dim);
1441
1442 return hash;
1443 }
1444
1445 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1446 {
1447 if (!dim)
1448 return -1;
1449
1450 if (!isl_space_is_set(dim))
1451 return 0;
1452
1453 return dim->nested[1] != NULL;
1454 }
1455
1456 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1457 {
1458 isl_space *wrap;
1459
1460 if (!dim)
1461 return NULL;
1462
1463 wrap = isl_space_set_alloc(dim->ctx,
1464 dim->nparam, dim->n_in + dim->n_out);
1465
1466 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1467 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1468 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1469
1470 if (!wrap)
1471 goto error;
1472
1473 wrap->nested[1] = dim;
1474
1475 return wrap;
1476 error:
1477 isl_space_free(dim);
1478 return NULL;
1479 }
1480
1481 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1482 {
1483 isl_space *unwrap;
1484
1485 if (!dim)
1486 return NULL;
1487
1488 if (!isl_space_is_wrapping(dim))
1489 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1490 goto error);
1491
1492 unwrap = isl_space_copy(dim->nested[1]);
1493 isl_space_free(dim);
1494
1495 return unwrap;
1496 error:
1497 isl_space_free(dim);
1498 return NULL;
1499 }
1500
1501 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1502 {
1503 if (type != isl_dim_in && type != isl_dim_out)
1504 return 0;
1505 if (!dim)
1506 return -1;
1507 if (dim->tuple_id[type - isl_dim_in])
1508 return 1;
1509 if (dim->nested[type - isl_dim_in])
1510 return 1;
1511 return 0;
1512 }
1513
1514 int isl_space_may_be_set(__isl_keep isl_space *dim)
1515 {
1516 if (!dim)
1517 return -1;
1518 if (isl_space_is_set(dim))
1519 return 1;
1520 if (isl_space_dim(dim, isl_dim_in) != 0)
1521 return 0;
1522 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1523 return 0;
1524 return 1;
1525 }
1526
1527 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1528 enum isl_dim_type type)
1529 {
1530 if (!isl_space_is_named_or_nested(dim, type))
1531 return dim;
1532
1533 dim = isl_space_cow(dim);
1534 if (!dim)
1535 return NULL;
1536
1537 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1538 dim->tuple_id[type - isl_dim_in] = NULL;
1539 isl_space_free(dim->nested[type - isl_dim_in]);
1540 dim->nested[type - isl_dim_in] = NULL;
1541
1542 return dim;
1543 }
1544
1545 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1546 {
1547 if (!dim)
1548 return NULL;
1549 if (!dim->nested[0] && !dim->nested[1])
1550 return dim;
1551
1552 if (dim->nested[0])
1553 dim = isl_space_reset(dim, isl_dim_in);
1554 if (dim && dim->nested[1])
1555 dim = isl_space_reset(dim, isl_dim_out);
1556
1557 return dim;
1558 }
1559
1560 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1561 {
1562 if (!dim)
1563 return NULL;
1564 if (!dim->nested[0])
1565 return dim;
1566
1567 return isl_space_reset(dim, isl_dim_in);
1568 }
1569
1570 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1571 {
1572 if (!dim)
1573 return NULL;
1574 if (!dim->nested[1])
1575 return dim;
1576
1577 return isl_space_reset(dim, isl_dim_out);
1578 }
1579
1580 /* Replace the dimensions of the given type of dst by those of src.
1581 */
1582 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1583 enum isl_dim_type type, __isl_keep isl_space *src)
1584 {
1585 dst = isl_space_cow(dst);
1586
1587 if (!dst || !src)
1588 goto error;
1589
1590 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1591 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1592 dst = copy_ids(dst, type, 0, src, type);
1593
1594 if (dst && type == isl_dim_param) {
1595 int i;
1596 for (i = 0; i <= 1; ++i) {
1597 if (!dst->nested[i])
1598 continue;
1599 dst->nested[i] = isl_space_replace(dst->nested[i],
1600 type, src);
1601 if (!dst->nested[i])
1602 goto error;
1603 }
1604 }
1605
1606 return dst;
1607 error:
1608 isl_space_free(dst);
1609 return NULL;
1610 }
1611
1612 /* Given a dimension specification "dim" of a set, create a dimension
1613 * specification for the lift of the set. In particular, the result
1614 * is of the form [dim -> local[..]], with n_local variables in the
1615 * range of the wrapped map.
1616 */
1617 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1618 {
1619 isl_space *local_dim;
1620
1621 if (!dim)
1622 return NULL;
1623
1624 local_dim = isl_space_dup(dim);
1625 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1626 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1627 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1628 dim = isl_space_join(isl_space_from_domain(dim),
1629 isl_space_from_range(local_dim));
1630 dim = isl_space_wrap(dim);
1631 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1632
1633 return dim;
1634 }
1635
1636 int isl_space_can_zip(__isl_keep isl_space *dim)
1637 {
1638 if (!dim)
1639 return -1;
1640
1641 return dim->nested[0] && dim->nested[1];
1642 }
1643
1644 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1645 {
1646 isl_space *dom, *ran;
1647 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1648
1649 if (!isl_space_can_zip(dim))
1650 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1651 goto error);
1652
1653 if (!dim)
1654 return 0;
1655 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1656 ran = isl_space_unwrap(isl_space_range(dim));
1657 dom_dom = isl_space_domain(isl_space_copy(dom));
1658 dom_ran = isl_space_range(dom);
1659 ran_dom = isl_space_domain(isl_space_copy(ran));
1660 ran_ran = isl_space_range(ran);
1661 dom = isl_space_join(isl_space_from_domain(dom_dom),
1662 isl_space_from_range(ran_dom));
1663 ran = isl_space_join(isl_space_from_domain(dom_ran),
1664 isl_space_from_range(ran_ran));
1665 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1666 isl_space_from_range(isl_space_wrap(ran)));
1667 error:
1668 isl_space_free(dim);
1669 return NULL;
1670 }
1671
1672 int isl_space_has_named_params(__isl_keep isl_space *dim)
1673 {
1674 int i;
1675 unsigned off;
1676
1677 if (!dim)
1678 return -1;
1679 if (dim->nparam == 0)
1680 return 1;
1681 off = isl_space_offset(dim, isl_dim_param);
1682 if (off + dim->nparam > dim->n_id)
1683 return 0;
1684 for (i = 0; i < dim->nparam; ++i)
1685 if (!dim->ids[off + i])
1686 return 0;
1687 return 1;
1688 }
1689
1690 /* Align the initial parameters of dim1 to match the order in dim2.
1691 */
1692 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
1693 __isl_take isl_space *dim2)
1694 {
1695 isl_reordering *exp;
1696
1697 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
1698 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
1699 "parameter alignment requires named parameters",
1700 goto error);
1701
1702 dim2 = isl_space_params(dim2);
1703 exp = isl_parameter_alignment_reordering(dim1, dim2);
1704 exp = isl_reordering_extend_space(exp, dim1);
1705 isl_space_free(dim2);
1706 if (!exp)
1707 return NULL;
1708 dim1 = isl_space_copy(exp->dim);
1709 isl_reordering_free(exp);
1710 return dim1;
1711 error:
1712 isl_space_free(dim1);
1713 isl_space_free(dim2);
1714 return NULL;
1715 }
1716
1717 /* Given the space of set (domain), construct a space for a map
1718 * with as domain the given space and as range the range of "model".
1719 */
1720 __isl_give isl_space *isl_space_extend_domain_with_range(
1721 __isl_take isl_space *domain, __isl_take isl_space *model)
1722 {
1723 isl_space *space;
1724
1725 space = isl_space_from_domain(domain);
1726 space = isl_space_add_dims(space, isl_dim_out,
1727 isl_space_dim(model, isl_dim_out));
1728 if (isl_space_has_tuple_id(model, isl_dim_out))
1729 space = isl_space_set_tuple_id(space, isl_dim_out,
1730 isl_space_get_tuple_id(model, isl_dim_out));
1731 isl_space_free(model);
1732 return space;
1733 }
Integer set library