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isl_space_insert_dims: fix handling of nested spaces
[isl.git] / isl_space.c
blob87fad1f7a950bd51231053b6f9f4457c67fb34e6
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 /* Reset the id of the given dimension of "space".
472 * If the dimension already has an id, then it is removed.
473 * If the dimension is a parameter, then we need to reset it
474 * in the nested spaces (if any) as well.
475 */
476 __isl_give isl_space *isl_space_reset_dim_id(__isl_take isl_space *space,
477 enum isl_dim_type type, unsigned pos)
478 {
479 space = isl_space_cow(space);
480 if (!space)
481 goto error;
482
483 if (type == isl_dim_param) {
484 int i;
485
486 for (i = 0; i < 2; ++i) {
487 if (!space->nested[i])
488 continue;
489 space->nested[i] =
490 isl_space_reset_dim_id(space->nested[i],
491 type, pos);
492 if (!space->nested[i])
493 goto error;
494 }
495 }
496
497 isl_id_free(get_id(space, type, pos));
498 return set_id(space, type, pos, NULL);
499 error:
500 isl_space_free(space);
501 return NULL;
502 }
503
504 int isl_space_has_dim_id(__isl_keep isl_space *dim,
505 enum isl_dim_type type, unsigned pos)
506 {
507 if (!dim)
508 return -1;
509 return get_id(dim, type, pos) != NULL;
510 }
511
512 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
513 enum isl_dim_type type, unsigned pos)
514 {
515 if (!dim)
516 return NULL;
517 if (!get_id(dim, type, pos))
518 isl_die(dim->ctx, isl_error_invalid,
519 "dim has no id", return NULL);
520 return isl_id_copy(get_id(dim, type, pos));
521 }
522
523 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
524 enum isl_dim_type type, const char *s)
525 {
526 isl_id *id;
527
528 if (!dim)
529 return NULL;
530
531 if (!s)
532 return isl_space_reset_tuple_id(dim, type);
533
534 if (!name_ok(dim->ctx, s))
535 goto error;
536
537 id = isl_id_alloc(dim->ctx, s, NULL);
538 return isl_space_set_tuple_id(dim, type, id);
539 error:
540 isl_space_free(dim);
541 return NULL;
542 }
543
544 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
545 enum isl_dim_type type)
546 {
547 isl_id *id;
548 if (!dim)
549 return NULL;
550 if (type != isl_dim_in && type != isl_dim_out)
551 return NULL;
552 id = dim->tuple_id[type - isl_dim_in];
553 return id ? id->name : NULL;
554 }
555
556 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
557 enum isl_dim_type type, unsigned pos,
558 const char *s)
559 {
560 isl_id *id;
561
562 if (!dim)
563 return NULL;
564 if (!s)
565 return isl_space_reset_dim_id(dim, type, pos);
566 if (!name_ok(dim->ctx, s))
567 goto error;
568 id = isl_id_alloc(dim->ctx, s, NULL);
569 return isl_space_set_dim_id(dim, type, pos, id);
570 error:
571 isl_space_free(dim);
572 return NULL;
573 }
574
575 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
576 enum isl_dim_type type, unsigned pos)
577 {
578 isl_id *id = get_id(dim, type, pos);
579 return id ? id->name : NULL;
580 }
581
582 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
583 __isl_keep isl_id *id)
584 {
585 int i;
586 int offset;
587 int n;
588
589 if (!dim || !id)
590 return -1;
591
592 offset = isl_space_offset(dim, type);
593 n = isl_space_dim(dim, type);
594 for (i = 0; i < n && offset + i < dim->n_id; ++i)
595 if (dim->ids[offset + i] == id)
596 return i;
597
598 return -1;
599 }
600
601 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
602 enum isl_dim_type type, const char *name)
603 {
604 int i;
605 int offset;
606 int n;
607
608 if (!space || !name)
609 return -1;
610
611 offset = isl_space_offset(space, type);
612 n = isl_space_dim(space, type);
613 for (i = 0; i < n && offset + i < space->n_id; ++i)
614 if (space->ids[offset + i]->name &&
615 !strcmp(space->ids[offset + i]->name, name))
616 return i;
617
618 return -1;
619 }
620
621 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
622 enum isl_dim_type type)
623 {
624 if (!dim)
625 return NULL;
626 if (type == isl_dim_in)
627 return dim->tuple_id[0];
628 if (type == isl_dim_out)
629 return dim->tuple_id[1];
630 return NULL;
631 }
632
633 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
634 enum isl_dim_type type)
635 {
636 if (!dim)
637 return NULL;
638 if (type == isl_dim_in)
639 return dim->nested[0];
640 if (type == isl_dim_out)
641 return dim->nested[1];
642 return NULL;
643 }
644
645 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
646 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
647 {
648 isl_id *id1, *id2;
649 isl_space *nested1, *nested2;
650
651 if (!dim1 || !dim2)
652 return -1;
653
654 if (dim1 == dim2 && dim1_type == dim2_type)
655 return 1;
656
657 if (n(dim1, dim1_type) != n(dim2, dim2_type))
658 return 0;
659 id1 = tuple_id(dim1, dim1_type);
660 id2 = tuple_id(dim2, dim2_type);
661 if (!id1 ^ !id2)
662 return 0;
663 if (id1 && id1 != id2)
664 return 0;
665 nested1 = nested(dim1, dim1_type);
666 nested2 = nested(dim2, dim2_type);
667 if (!nested1 ^ !nested2)
668 return 0;
669 if (nested1 && !isl_space_is_equal(nested1, nested2))
670 return 0;
671 return 1;
672 }
673
674 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
675 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
676 {
677 int i;
678
679 if (dim1 == dim2 && dim1_type == dim2_type)
680 return 1;
681
682 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
683 return 0;
684
685 if (!dim1->ids && !dim2->ids)
686 return 1;
687
688 for (i = 0; i < n(dim1, dim1_type); ++i) {
689 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
690 return 0;
691 }
692 return 1;
693 }
694
695 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
696 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
697 {
698 if (!dim1 || !dim2)
699 return -1;
700
701 return match(dim1, dim1_type, dim2, dim2_type);
702 }
703
704 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
705 unsigned first, unsigned n, __isl_keep isl_id **ids)
706 {
707 int i;
708
709 for (i = 0; i < n ; ++i)
710 ids[i] = get_id(dim, type, first + i);
711 }
712
713 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
714 unsigned nparam, unsigned n_in, unsigned n_out)
715 {
716 isl_id **ids = NULL;
717
718 if (!dim)
719 return NULL;
720 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
721 return dim;
722
723 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
724 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
725 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
726
727 dim = isl_space_cow(dim);
728
729 if (dim->ids) {
730 ids = isl_calloc_array(dim->ctx, isl_id *,
731 nparam + n_in + n_out);
732 if (!ids)
733 goto error;
734 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
735 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
736 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
737 free(dim->ids);
738 dim->ids = ids;
739 dim->n_id = nparam + n_in + n_out;
740 }
741 dim->nparam = nparam;
742 dim->n_in = n_in;
743 dim->n_out = n_out;
744
745 return dim;
746 error:
747 free(ids);
748 isl_space_free(dim);
749 return NULL;
750 }
751
752 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
753 enum isl_dim_type type, unsigned n)
754 {
755 if (!dim)
756 return NULL;
757 dim = isl_space_reset(dim, type);
758 switch (type) {
759 case isl_dim_param:
760 dim = isl_space_extend(dim,
761 dim->nparam + n, dim->n_in, dim->n_out);
762 if (dim && dim->nested[0] &&
763 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
764 isl_dim_param, n)))
765 goto error;
766 if (dim && dim->nested[1] &&
767 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
768 isl_dim_param, n)))
769 goto error;
770 return dim;
771 case isl_dim_in:
772 return isl_space_extend(dim,
773 dim->nparam, dim->n_in + n, dim->n_out);
774 case isl_dim_out:
775 return isl_space_extend(dim,
776 dim->nparam, dim->n_in, dim->n_out + n);
777 default:
778 isl_die(dim->ctx, isl_error_invalid,
779 "cannot add dimensions of specified type", goto error);
780 }
781 error:
782 isl_space_free(dim);
783 return NULL;
784 }
785
786 static int valid_dim_type(enum isl_dim_type type)
787 {
788 switch (type) {
789 case isl_dim_param:
790 case isl_dim_in:
791 case isl_dim_out:
792 return 1;
793 default:
794 return 0;
795 }
796 }
797
798 /* Insert "n" dimensions of type "type" at position "pos".
799 * If we are inserting parameters, then they are also inserted in
800 * any nested spaces.
801 */
802 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
803 enum isl_dim_type type, unsigned pos, unsigned n)
804 {
805 isl_id **ids = NULL;
806
807 if (!dim)
808 return NULL;
809 if (n == 0)
810 return isl_space_reset(dim, type);
811
812 if (!valid_dim_type(type))
813 isl_die(dim->ctx, isl_error_invalid,
814 "cannot insert dimensions of specified type",
815 goto error);
816
817 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
818
819 dim = isl_space_cow(dim);
820 if (!dim)
821 return NULL;
822
823 if (dim->ids) {
824 enum isl_dim_type t;
825 int off;
826 int s[3];
827 int *size = s - isl_dim_param;
828 ids = isl_calloc_array(dim->ctx, isl_id *,
829 dim->nparam + dim->n_in + dim->n_out + n);
830 if (!ids)
831 goto error;
832 off = 0;
833 size[isl_dim_param] = dim->nparam;
834 size[isl_dim_in] = dim->n_in;
835 size[isl_dim_out] = dim->n_out;
836 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
837 if (t != type) {
838 get_ids(dim, t, 0, size[t], ids + off);
839 off += size[t];
840 } else {
841 get_ids(dim, t, 0, pos, ids + off);
842 off += pos + n;
843 get_ids(dim, t, pos, size[t] - pos, ids + off);
844 off += size[t] - pos;
845 }
846 }
847 free(dim->ids);
848 dim->ids = ids;
849 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
850 }
851 switch (type) {
852 case isl_dim_param: dim->nparam += n; break;
853 case isl_dim_in: dim->n_in += n; break;
854 case isl_dim_out: dim->n_out += n; break;
855 default: ;
856 }
857 dim = isl_space_reset(dim, type);
858
859 if (type == isl_dim_param) {
860 if (dim && dim->nested[0] &&
861 !(dim->nested[0] = isl_space_insert_dims(dim->nested[0],
862 isl_dim_param, pos, n)))
863 goto error;
864 if (dim && dim->nested[1] &&
865 !(dim->nested[1] = isl_space_insert_dims(dim->nested[1],
866 isl_dim_param, pos, n)))
867 goto error;
868 }
869
870 return dim;
871 error:
872 isl_space_free(dim);
873 return NULL;
874 }
875
876 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
877 enum isl_dim_type dst_type, unsigned dst_pos,
878 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
879 {
880 int i;
881
882 if (!dim)
883 return NULL;
884 if (n == 0)
885 return dim;
886
887 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
888 goto error);
889
890 if (dst_type == src_type && dst_pos == src_pos)
891 return dim;
892
893 isl_assert(dim->ctx, dst_type != src_type, goto error);
894
895 dim = isl_space_reset(dim, src_type);
896 dim = isl_space_reset(dim, dst_type);
897
898 dim = isl_space_cow(dim);
899 if (!dim)
900 return NULL;
901
902 if (dim->ids) {
903 isl_id **ids;
904 enum isl_dim_type t;
905 int off;
906 int s[3];
907 int *size = s - isl_dim_param;
908 ids = isl_calloc_array(dim->ctx, isl_id *,
909 dim->nparam + dim->n_in + dim->n_out);
910 if (!ids)
911 goto error;
912 off = 0;
913 size[isl_dim_param] = dim->nparam;
914 size[isl_dim_in] = dim->n_in;
915 size[isl_dim_out] = dim->n_out;
916 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
917 if (t == dst_type) {
918 get_ids(dim, t, 0, dst_pos, ids + off);
919 off += dst_pos;
920 get_ids(dim, src_type, src_pos, n, ids + off);
921 off += n;
922 get_ids(dim, t, dst_pos, size[t] - dst_pos,
923 ids + off);
924 off += size[t] - dst_pos;
925 } else if (t == src_type) {
926 get_ids(dim, t, 0, src_pos, ids + off);
927 off += src_pos;
928 get_ids(dim, t, src_pos + n,
929 size[t] - src_pos - n, ids + off);
930 off += size[t] - src_pos - n;
931 } else {
932 get_ids(dim, t, 0, size[t], ids + off);
933 off += size[t];
934 }
935 }
936 free(dim->ids);
937 dim->ids = ids;
938 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
939 }
940
941 switch (dst_type) {
942 case isl_dim_param: dim->nparam += n; break;
943 case isl_dim_in: dim->n_in += n; break;
944 case isl_dim_out: dim->n_out += n; break;
945 default: ;
946 }
947
948 switch (src_type) {
949 case isl_dim_param: dim->nparam -= n; break;
950 case isl_dim_in: dim->n_in -= n; break;
951 case isl_dim_out: dim->n_out -= n; break;
952 default: ;
953 }
954
955 if (dst_type != isl_dim_param && src_type != isl_dim_param)
956 return dim;
957
958 for (i = 0; i < 2; ++i) {
959 if (!dim->nested[i])
960 continue;
961 dim->nested[i] = isl_space_replace(dim->nested[i],
962 isl_dim_param, dim);
963 if (!dim->nested[i])
964 goto error;
965 }
966
967 return dim;
968 error:
969 isl_space_free(dim);
970 return NULL;
971 }
972
973 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
974 __isl_take isl_space *right)
975 {
976 isl_space *dim;
977
978 if (!left || !right)
979 goto error;
980
981 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
982 goto error);
983 isl_assert(left->ctx,
984 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
985 goto error);
986
987 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
988 if (!dim)
989 goto error;
990
991 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
992 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
993 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
994
995 if (dim && left->tuple_id[0] &&
996 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
997 goto error;
998 if (dim && right->tuple_id[1] &&
999 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
1000 goto error;
1001 if (dim && left->nested[0] &&
1002 !(dim->nested[0] = isl_space_copy(left->nested[0])))
1003 goto error;
1004 if (dim && right->nested[1] &&
1005 !(dim->nested[1] = isl_space_copy(right->nested[1])))
1006 goto error;
1007
1008 isl_space_free(left);
1009 isl_space_free(right);
1010
1011 return dim;
1012 error:
1013 isl_space_free(left);
1014 isl_space_free(right);
1015 return NULL;
1016 }
1017
1018 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
1019 __isl_take isl_space *right)
1020 {
1021 isl_space *dom1, *dom2, *nest1, *nest2;
1022
1023 if (!left || !right)
1024 goto error;
1025
1026 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1027 goto error);
1028
1029 dom1 = isl_space_domain(isl_space_copy(left));
1030 dom2 = isl_space_domain(isl_space_copy(right));
1031 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1032
1033 dom1 = isl_space_range(left);
1034 dom2 = isl_space_range(right);
1035 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1036
1037 return isl_space_join(isl_space_reverse(nest1), nest2);
1038 error:
1039 isl_space_free(left);
1040 isl_space_free(right);
1041 return NULL;
1042 }
1043
1044 /* Given two spaces { A -> C } and { B -> C }, construct the space
1045 * { [A -> B] -> C }
1046 */
1047 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1048 __isl_take isl_space *right)
1049 {
1050 isl_space *ran, *dom1, *dom2, *nest;
1051
1052 if (!left || !right)
1053 goto error;
1054
1055 if (!match(left, isl_dim_param, right, isl_dim_param))
1056 isl_die(left->ctx, isl_error_invalid,
1057 "parameters need to match", goto error);
1058 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
1059 isl_die(left->ctx, isl_error_invalid,
1060 "ranges need to match", goto error);
1061
1062 ran = isl_space_range(isl_space_copy(left));
1063
1064 dom1 = isl_space_domain(left);
1065 dom2 = isl_space_domain(right);
1066 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1067
1068 return isl_space_join(isl_space_reverse(nest), ran);
1069 error:
1070 isl_space_free(left);
1071 isl_space_free(right);
1072 return NULL;
1073 }
1074
1075 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1076 __isl_take isl_space *right)
1077 {
1078 isl_space *dom, *ran1, *ran2, *nest;
1079
1080 if (!left || !right)
1081 goto error;
1082
1083 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1084 goto error);
1085 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1086 isl_die(left->ctx, isl_error_invalid,
1087 "domains need to match", goto error);
1088
1089 dom = isl_space_domain(isl_space_copy(left));
1090
1091 ran1 = isl_space_range(left);
1092 ran2 = isl_space_range(right);
1093 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1094
1095 return isl_space_join(isl_space_reverse(dom), nest);
1096 error:
1097 isl_space_free(left);
1098 isl_space_free(right);
1099 return NULL;
1100 }
1101
1102 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1103 {
1104 isl_ctx *ctx;
1105 isl_id **ids = NULL;
1106
1107 if (!dim)
1108 return NULL;
1109 ctx = isl_space_get_ctx(dim);
1110 if (!isl_space_is_set(dim))
1111 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1112 dim = isl_space_cow(dim);
1113 if (!dim)
1114 return NULL;
1115 if (dim->ids) {
1116 ids = isl_calloc_array(dim->ctx, isl_id *,
1117 dim->nparam + dim->n_out + dim->n_out);
1118 if (!ids)
1119 goto error;
1120 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1121 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1122 }
1123 dim->n_in = dim->n_out;
1124 if (ids) {
1125 free(dim->ids);
1126 dim->ids = ids;
1127 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1128 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1129 }
1130 isl_id_free(dim->tuple_id[0]);
1131 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1132 isl_space_free(dim->nested[0]);
1133 dim->nested[0] = isl_space_copy(dim->nested[1]);
1134 return dim;
1135 error:
1136 isl_space_free(dim);
1137 return NULL;
1138 }
1139
1140 __isl_give isl_space *isl_space_map_from_domain_and_range(
1141 __isl_take isl_space *domain, __isl_take isl_space *range)
1142 {
1143 if (!domain || !range)
1144 goto error;
1145 if (!isl_space_is_set(domain))
1146 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1147 "domain is not a set space", goto error);
1148 if (!isl_space_is_set(range))
1149 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1150 "range is not a set space", goto error);
1151 return isl_space_join(isl_space_reverse(domain), range);
1152 error:
1153 isl_space_free(domain);
1154 isl_space_free(range);
1155 return NULL;
1156 }
1157
1158 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1159 enum isl_dim_type type,
1160 unsigned first, unsigned n, __isl_take isl_id **ids)
1161 {
1162 int i;
1163
1164 for (i = 0; i < n ; ++i)
1165 dim = set_id(dim, type, first + i, ids[i]);
1166
1167 return dim;
1168 }
1169
1170 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1171 {
1172 unsigned t;
1173 isl_space *nested;
1174 isl_id **ids = NULL;
1175 isl_id *id;
1176
1177 if (!dim)
1178 return NULL;
1179 if (match(dim, isl_dim_in, dim, isl_dim_out))
1180 return dim;
1181
1182 dim = isl_space_cow(dim);
1183 if (!dim)
1184 return NULL;
1185
1186 id = dim->tuple_id[0];
1187 dim->tuple_id[0] = dim->tuple_id[1];
1188 dim->tuple_id[1] = id;
1189
1190 nested = dim->nested[0];
1191 dim->nested[0] = dim->nested[1];
1192 dim->nested[1] = nested;
1193
1194 if (dim->ids) {
1195 ids = isl_alloc_array(dim->ctx, isl_id *,
1196 dim->n_in + dim->n_out);
1197 if (!ids)
1198 goto error;
1199 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1200 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1201 }
1202
1203 t = dim->n_in;
1204 dim->n_in = dim->n_out;
1205 dim->n_out = t;
1206
1207 if (dim->ids) {
1208 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1209 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1210 free(ids);
1211 }
1212
1213 return dim;
1214 error:
1215 free(ids);
1216 isl_space_free(dim);
1217 return NULL;
1218 }
1219
1220 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1221 enum isl_dim_type type, unsigned first, unsigned num)
1222 {
1223 int i;
1224
1225 if (!dim)
1226 return NULL;
1227
1228 if (num == 0)
1229 return isl_space_reset(dim, type);
1230
1231 if (!valid_dim_type(type))
1232 isl_die(dim->ctx, isl_error_invalid,
1233 "cannot drop dimensions of specified type", goto error);
1234
1235 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1236 dim = isl_space_cow(dim);
1237 if (!dim)
1238 goto error;
1239 if (dim->ids) {
1240 dim = extend_ids(dim);
1241 if (!dim)
1242 goto error;
1243 for (i = 0; i < num; ++i)
1244 isl_id_free(get_id(dim, type, first + i));
1245 for (i = first+num; i < n(dim, type); ++i)
1246 set_id(dim, type, i - num, get_id(dim, type, i));
1247 switch (type) {
1248 case isl_dim_param:
1249 get_ids(dim, isl_dim_in, 0, dim->n_in,
1250 dim->ids + offset(dim, isl_dim_in) - num);
1251 case isl_dim_in:
1252 get_ids(dim, isl_dim_out, 0, dim->n_out,
1253 dim->ids + offset(dim, isl_dim_out) - num);
1254 default:
1255 ;
1256 }
1257 dim->n_id -= num;
1258 }
1259 switch (type) {
1260 case isl_dim_param: dim->nparam -= num; break;
1261 case isl_dim_in: dim->n_in -= num; break;
1262 case isl_dim_out: dim->n_out -= num; break;
1263 default: ;
1264 }
1265 dim = isl_space_reset(dim, type);
1266 if (type == isl_dim_param) {
1267 if (dim && dim->nested[0] &&
1268 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1269 isl_dim_param, first, num)))
1270 goto error;
1271 if (dim && dim->nested[1] &&
1272 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1273 isl_dim_param, first, num)))
1274 goto error;
1275 }
1276 return dim;
1277 error:
1278 isl_space_free(dim);
1279 return NULL;
1280 }
1281
1282 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1283 unsigned first, unsigned n)
1284 {
1285 if (!dim)
1286 return NULL;
1287 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1288 }
1289
1290 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1291 unsigned first, unsigned n)
1292 {
1293 if (!dim)
1294 return NULL;
1295 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1296 }
1297
1298 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1299 {
1300 if (!dim)
1301 return NULL;
1302 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1303 dim = isl_space_reverse(dim);
1304 dim = mark_as_set(dim);
1305 return dim;
1306 }
1307
1308 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1309 {
1310 if (!dim)
1311 return NULL;
1312 if (!isl_space_is_set(dim))
1313 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1314 "not a set space", goto error);
1315 dim = isl_space_reverse(dim);
1316 dim = isl_space_reset(dim, isl_dim_out);
1317 return dim;
1318 error:
1319 isl_space_free(dim);
1320 return NULL;
1321 }
1322
1323 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1324 {
1325 if (!dim)
1326 return NULL;
1327 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1328 dim = mark_as_set(dim);
1329 return dim;
1330 }
1331
1332 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1333 {
1334 if (!dim)
1335 return NULL;
1336 if (!isl_space_is_set(dim))
1337 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1338 "not a set space", goto error);
1339 return isl_space_reset(dim, isl_dim_in);
1340 error:
1341 isl_space_free(dim);
1342 return NULL;
1343 }
1344
1345 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1346 {
1347 if (isl_space_is_params(space))
1348 return space;
1349 space = isl_space_drop_dims(space,
1350 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1351 space = isl_space_drop_dims(space,
1352 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1353 space = mark_as_params(space);
1354 return space;
1355 }
1356
1357 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1358 {
1359 if (!space)
1360 return NULL;
1361 if (!isl_space_is_params(space))
1362 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1363 "not a parameter space", goto error);
1364 return isl_space_reset(space, isl_dim_set);
1365 error:
1366 isl_space_free(space);
1367 return NULL;
1368 }
1369
1370 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1371 {
1372 dim = isl_space_cow(dim);
1373 if (!dim)
1374 return NULL;
1375
1376 dim->n_out += dim->n_in;
1377 dim->n_in = 0;
1378 dim = isl_space_reset(dim, isl_dim_in);
1379 dim = isl_space_reset(dim, isl_dim_out);
1380
1381 return dim;
1382 }
1383
1384 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1385 unsigned n_div)
1386 {
1387 int i;
1388
1389 if (!dim)
1390 return NULL;
1391 if (n_div == 0 &&
1392 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1393 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1394 dim = isl_space_cow(dim);
1395 if (!dim)
1396 return NULL;
1397 dim->n_out += dim->nparam + dim->n_in + n_div;
1398 dim->nparam = 0;
1399 dim->n_in = 0;
1400
1401 for (i = 0; i < dim->n_id; ++i)
1402 isl_id_free(get_id(dim, isl_dim_out, i));
1403 dim->n_id = 0;
1404 dim = isl_space_reset(dim, isl_dim_in);
1405 dim = isl_space_reset(dim, isl_dim_out);
1406
1407 return dim;
1408 }
1409
1410 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1411 {
1412 if (!dim1 || !dim2)
1413 return -1;
1414 if (dim1 == dim2)
1415 return 1;
1416 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1417 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1418 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1419 }
1420
1421 /* Is space1 equal to the domain of space2?
1422 */
1423 int isl_space_is_domain(__isl_keep isl_space *space1,
1424 __isl_keep isl_space *space2)
1425 {
1426 if (!space1 || !space2)
1427 return -1;
1428 if (!isl_space_is_set(space1))
1429 return 0;
1430 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1431 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1432 }
1433
1434 int isl_space_compatible(__isl_keep isl_space *dim1,
1435 __isl_keep isl_space *dim2)
1436 {
1437 return dim1->nparam == dim2->nparam &&
1438 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1439 }
1440
1441 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1442 {
1443 int i;
1444 isl_id *id;
1445
1446 if (!dim)
1447 return hash;
1448
1449 hash = isl_hash_builtin(hash, dim->nparam);
1450 hash = isl_hash_builtin(hash, dim->n_in);
1451 hash = isl_hash_builtin(hash, dim->n_out);
1452
1453 for (i = 0; i < dim->nparam; ++i) {
1454 id = get_id(dim, isl_dim_param, i);
1455 hash = isl_hash_id(hash, id);
1456 }
1457
1458 id = tuple_id(dim, isl_dim_in);
1459 hash = isl_hash_id(hash, id);
1460 id = tuple_id(dim, isl_dim_out);
1461 hash = isl_hash_id(hash, id);
1462
1463 hash = isl_hash_dim(hash, dim->nested[0]);
1464 hash = isl_hash_dim(hash, dim->nested[1]);
1465
1466 return hash;
1467 }
1468
1469 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1470 {
1471 uint32_t hash;
1472
1473 if (!dim)
1474 return 0;
1475
1476 hash = isl_hash_init();
1477 hash = isl_hash_dim(hash, dim);
1478
1479 return hash;
1480 }
1481
1482 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1483 {
1484 if (!dim)
1485 return -1;
1486
1487 if (!isl_space_is_set(dim))
1488 return 0;
1489
1490 return dim->nested[1] != NULL;
1491 }
1492
1493 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1494 {
1495 isl_space *wrap;
1496
1497 if (!dim)
1498 return NULL;
1499
1500 wrap = isl_space_set_alloc(dim->ctx,
1501 dim->nparam, dim->n_in + dim->n_out);
1502
1503 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1504 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1505 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1506
1507 if (!wrap)
1508 goto error;
1509
1510 wrap->nested[1] = dim;
1511
1512 return wrap;
1513 error:
1514 isl_space_free(dim);
1515 return NULL;
1516 }
1517
1518 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1519 {
1520 isl_space *unwrap;
1521
1522 if (!dim)
1523 return NULL;
1524
1525 if (!isl_space_is_wrapping(dim))
1526 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1527 goto error);
1528
1529 unwrap = isl_space_copy(dim->nested[1]);
1530 isl_space_free(dim);
1531
1532 return unwrap;
1533 error:
1534 isl_space_free(dim);
1535 return NULL;
1536 }
1537
1538 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1539 {
1540 if (type != isl_dim_in && type != isl_dim_out)
1541 return 0;
1542 if (!dim)
1543 return -1;
1544 if (dim->tuple_id[type - isl_dim_in])
1545 return 1;
1546 if (dim->nested[type - isl_dim_in])
1547 return 1;
1548 return 0;
1549 }
1550
1551 int isl_space_may_be_set(__isl_keep isl_space *dim)
1552 {
1553 if (!dim)
1554 return -1;
1555 if (isl_space_is_set(dim))
1556 return 1;
1557 if (isl_space_dim(dim, isl_dim_in) != 0)
1558 return 0;
1559 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1560 return 0;
1561 return 1;
1562 }
1563
1564 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1565 enum isl_dim_type type)
1566 {
1567 if (!isl_space_is_named_or_nested(dim, type))
1568 return dim;
1569
1570 dim = isl_space_cow(dim);
1571 if (!dim)
1572 return NULL;
1573
1574 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1575 dim->tuple_id[type - isl_dim_in] = NULL;
1576 isl_space_free(dim->nested[type - isl_dim_in]);
1577 dim->nested[type - isl_dim_in] = NULL;
1578
1579 return dim;
1580 }
1581
1582 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1583 {
1584 if (!dim)
1585 return NULL;
1586 if (!dim->nested[0] && !dim->nested[1])
1587 return dim;
1588
1589 if (dim->nested[0])
1590 dim = isl_space_reset(dim, isl_dim_in);
1591 if (dim && dim->nested[1])
1592 dim = isl_space_reset(dim, isl_dim_out);
1593
1594 return dim;
1595 }
1596
1597 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1598 {
1599 if (!dim)
1600 return NULL;
1601 if (!dim->nested[0])
1602 return dim;
1603
1604 return isl_space_reset(dim, isl_dim_in);
1605 }
1606
1607 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1608 {
1609 if (!dim)
1610 return NULL;
1611 if (!dim->nested[1])
1612 return dim;
1613
1614 return isl_space_reset(dim, isl_dim_out);
1615 }
1616
1617 /* Replace the dimensions of the given type of dst by those of src.
1618 */
1619 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1620 enum isl_dim_type type, __isl_keep isl_space *src)
1621 {
1622 dst = isl_space_cow(dst);
1623
1624 if (!dst || !src)
1625 goto error;
1626
1627 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1628 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1629 dst = copy_ids(dst, type, 0, src, type);
1630
1631 if (dst && type == isl_dim_param) {
1632 int i;
1633 for (i = 0; i <= 1; ++i) {
1634 if (!dst->nested[i])
1635 continue;
1636 dst->nested[i] = isl_space_replace(dst->nested[i],
1637 type, src);
1638 if (!dst->nested[i])
1639 goto error;
1640 }
1641 }
1642
1643 return dst;
1644 error:
1645 isl_space_free(dst);
1646 return NULL;
1647 }
1648
1649 /* Given a dimension specification "dim" of a set, create a dimension
1650 * specification for the lift of the set. In particular, the result
1651 * is of the form [dim -> local[..]], with n_local variables in the
1652 * range of the wrapped map.
1653 */
1654 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1655 {
1656 isl_space *local_dim;
1657
1658 if (!dim)
1659 return NULL;
1660
1661 local_dim = isl_space_dup(dim);
1662 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1663 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1664 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1665 dim = isl_space_join(isl_space_from_domain(dim),
1666 isl_space_from_range(local_dim));
1667 dim = isl_space_wrap(dim);
1668 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1669
1670 return dim;
1671 }
1672
1673 int isl_space_can_zip(__isl_keep isl_space *dim)
1674 {
1675 if (!dim)
1676 return -1;
1677
1678 return dim->nested[0] && dim->nested[1];
1679 }
1680
1681 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1682 {
1683 isl_space *dom, *ran;
1684 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1685
1686 if (!isl_space_can_zip(dim))
1687 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1688 goto error);
1689
1690 if (!dim)
1691 return 0;
1692 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1693 ran = isl_space_unwrap(isl_space_range(dim));
1694 dom_dom = isl_space_domain(isl_space_copy(dom));
1695 dom_ran = isl_space_range(dom);
1696 ran_dom = isl_space_domain(isl_space_copy(ran));
1697 ran_ran = isl_space_range(ran);
1698 dom = isl_space_join(isl_space_from_domain(dom_dom),
1699 isl_space_from_range(ran_dom));
1700 ran = isl_space_join(isl_space_from_domain(dom_ran),
1701 isl_space_from_range(ran_ran));
1702 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1703 isl_space_from_range(isl_space_wrap(ran)));
1704 error:
1705 isl_space_free(dim);
1706 return NULL;
1707 }
1708
1709 int isl_space_has_named_params(__isl_keep isl_space *dim)
1710 {
1711 int i;
1712 unsigned off;
1713
1714 if (!dim)
1715 return -1;
1716 if (dim->nparam == 0)
1717 return 1;
1718 off = isl_space_offset(dim, isl_dim_param);
1719 if (off + dim->nparam > dim->n_id)
1720 return 0;
1721 for (i = 0; i < dim->nparam; ++i)
1722 if (!dim->ids[off + i])
1723 return 0;
1724 return 1;
1725 }
1726
1727 /* Align the initial parameters of dim1 to match the order in dim2.
1728 */
1729 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
1730 __isl_take isl_space *dim2)
1731 {
1732 isl_reordering *exp;
1733
1734 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
1735 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
1736 "parameter alignment requires named parameters",
1737 goto error);
1738
1739 dim2 = isl_space_params(dim2);
1740 exp = isl_parameter_alignment_reordering(dim1, dim2);
1741 exp = isl_reordering_extend_space(exp, dim1);
1742 isl_space_free(dim2);
1743 if (!exp)
1744 return NULL;
1745 dim1 = isl_space_copy(exp->dim);
1746 isl_reordering_free(exp);
1747 return dim1;
1748 error:
1749 isl_space_free(dim1);
1750 isl_space_free(dim2);
1751 return NULL;
1752 }
1753
1754 /* Given the space of set (domain), construct a space for a map
1755 * with as domain the given space and as range the range of "model".
1756 */
1757 __isl_give isl_space *isl_space_extend_domain_with_range(
1758 __isl_take isl_space *domain, __isl_take isl_space *model)
1759 {
1760 isl_space *space;
1761
1762 space = isl_space_from_domain(domain);
1763 space = isl_space_add_dims(space, isl_dim_out,
1764 isl_space_dim(model, isl_dim_out));
1765 if (isl_space_has_tuple_id(model, isl_dim_out))
1766 space = isl_space_set_tuple_id(space, isl_dim_out,
1767 isl_space_get_tuple_id(model, isl_dim_out));
1768 isl_space_free(model);
1769 return space;
1770 }
Integer set library