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add isl_local_space_is_set
[isl.git] / isl_space.c
blobd5f62ed95a03bb7d3bb5c1a946fb4fa44f81722b
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 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *dim,
438 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
439 {
440 dim = isl_space_cow(dim);
441 if (!dim || !id)
442 goto error;
443 isl_id_free(get_id(dim, type, pos));
444 return set_id(dim, type, pos, id);
445 error:
446 isl_id_free(id);
447 isl_space_free(dim);
448 return NULL;
449 }
450
451 int isl_space_has_dim_id(__isl_keep isl_space *dim,
452 enum isl_dim_type type, unsigned pos)
453 {
454 if (!dim)
455 return -1;
456 return get_id(dim, type, pos) != NULL;
457 }
458
459 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
460 enum isl_dim_type type, unsigned pos)
461 {
462 if (!dim)
463 return NULL;
464 if (!get_id(dim, type, pos))
465 isl_die(dim->ctx, isl_error_invalid,
466 "dim has no id", return NULL);
467 return isl_id_copy(get_id(dim, type, pos));
468 }
469
470 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
471 enum isl_dim_type type, const char *s)
472 {
473 isl_id *id;
474
475 if (!dim)
476 return NULL;
477
478 if (!s)
479 return isl_space_reset_tuple_id(dim, type);
480
481 if (!name_ok(dim->ctx, s))
482 goto error;
483
484 id = isl_id_alloc(dim->ctx, s, NULL);
485 return isl_space_set_tuple_id(dim, type, id);
486 error:
487 isl_space_free(dim);
488 return NULL;
489 }
490
491 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
492 enum isl_dim_type type)
493 {
494 isl_id *id;
495 if (!dim)
496 return NULL;
497 if (type != isl_dim_in && type != isl_dim_out)
498 return NULL;
499 id = dim->tuple_id[type - isl_dim_in];
500 return id ? id->name : NULL;
501 }
502
503 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
504 enum isl_dim_type type, unsigned pos,
505 const char *s)
506 {
507 isl_id *id;
508
509 if (!dim)
510 return NULL;
511 if (!name_ok(dim->ctx, s))
512 goto error;
513 id = isl_id_alloc(dim->ctx, s, NULL);
514 return isl_space_set_dim_id(dim, type, pos, id);
515 error:
516 isl_space_free(dim);
517 return NULL;
518 }
519
520 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
521 enum isl_dim_type type, unsigned pos)
522 {
523 isl_id *id = get_id(dim, type, pos);
524 return id ? id->name : NULL;
525 }
526
527 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
528 __isl_keep isl_id *id)
529 {
530 int i;
531 int offset;
532 int n;
533
534 if (!dim || !id)
535 return -1;
536
537 offset = isl_space_offset(dim, type);
538 n = isl_space_dim(dim, type);
539 for (i = 0; i < n && offset + i < dim->n_id; ++i)
540 if (dim->ids[offset + i] == id)
541 return i;
542
543 return -1;
544 }
545
546 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
547 enum isl_dim_type type)
548 {
549 if (!dim)
550 return NULL;
551 if (type == isl_dim_in)
552 return dim->tuple_id[0];
553 if (type == isl_dim_out)
554 return dim->tuple_id[1];
555 return NULL;
556 }
557
558 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
559 enum isl_dim_type type)
560 {
561 if (!dim)
562 return NULL;
563 if (type == isl_dim_in)
564 return dim->nested[0];
565 if (type == isl_dim_out)
566 return dim->nested[1];
567 return NULL;
568 }
569
570 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
571 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
572 {
573 isl_id *id1, *id2;
574 isl_space *nested1, *nested2;
575
576 if (!dim1 || !dim2)
577 return -1;
578
579 if (dim1 == dim2 && dim1_type == dim2_type)
580 return 1;
581
582 if (n(dim1, dim1_type) != n(dim2, dim2_type))
583 return 0;
584 id1 = tuple_id(dim1, dim1_type);
585 id2 = tuple_id(dim2, dim2_type);
586 if (!id1 ^ !id2)
587 return 0;
588 if (id1 && id1 != id2)
589 return 0;
590 nested1 = nested(dim1, dim1_type);
591 nested2 = nested(dim2, dim2_type);
592 if (!nested1 ^ !nested2)
593 return 0;
594 if (nested1 && !isl_space_is_equal(nested1, nested2))
595 return 0;
596 return 1;
597 }
598
599 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
600 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
601 {
602 int i;
603
604 if (dim1 == dim2 && dim1_type == dim2_type)
605 return 1;
606
607 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
608 return 0;
609
610 if (!dim1->ids && !dim2->ids)
611 return 1;
612
613 for (i = 0; i < n(dim1, dim1_type); ++i) {
614 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
615 return 0;
616 }
617 return 1;
618 }
619
620 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
621 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
622 {
623 if (!dim1 || !dim2)
624 return -1;
625
626 return match(dim1, dim1_type, dim2, dim2_type);
627 }
628
629 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
630 unsigned first, unsigned n, __isl_keep isl_id **ids)
631 {
632 int i;
633
634 for (i = 0; i < n ; ++i)
635 ids[i] = get_id(dim, type, first + i);
636 }
637
638 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
639 unsigned nparam, unsigned n_in, unsigned n_out)
640 {
641 isl_id **ids = NULL;
642
643 if (!dim)
644 return NULL;
645 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
646 return dim;
647
648 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
649 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
650 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
651
652 dim = isl_space_cow(dim);
653
654 if (dim->ids) {
655 ids = isl_calloc_array(dim->ctx, isl_id *,
656 nparam + n_in + n_out);
657 if (!ids)
658 goto error;
659 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
660 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
661 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
662 free(dim->ids);
663 dim->ids = ids;
664 dim->n_id = nparam + n_in + n_out;
665 }
666 dim->nparam = nparam;
667 dim->n_in = n_in;
668 dim->n_out = n_out;
669
670 return dim;
671 error:
672 free(ids);
673 isl_space_free(dim);
674 return NULL;
675 }
676
677 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
678 enum isl_dim_type type, unsigned n)
679 {
680 if (!dim)
681 return NULL;
682 dim = isl_space_reset(dim, type);
683 switch (type) {
684 case isl_dim_param:
685 dim = isl_space_extend(dim,
686 dim->nparam + n, dim->n_in, dim->n_out);
687 if (dim && dim->nested[0] &&
688 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
689 isl_dim_param, n)))
690 goto error;
691 if (dim && dim->nested[1] &&
692 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
693 isl_dim_param, n)))
694 goto error;
695 return dim;
696 case isl_dim_in:
697 return isl_space_extend(dim,
698 dim->nparam, dim->n_in + n, dim->n_out);
699 case isl_dim_out:
700 return isl_space_extend(dim,
701 dim->nparam, dim->n_in, dim->n_out + n);
702 default:
703 isl_die(dim->ctx, isl_error_invalid,
704 "cannot add dimensions of specified type", goto error);
705 }
706 error:
707 isl_space_free(dim);
708 return NULL;
709 }
710
711 static int valid_dim_type(enum isl_dim_type type)
712 {
713 switch (type) {
714 case isl_dim_param:
715 case isl_dim_in:
716 case isl_dim_out:
717 return 1;
718 default:
719 return 0;
720 }
721 }
722
723 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
724 enum isl_dim_type type, unsigned pos, unsigned n)
725 {
726 isl_id **ids = NULL;
727
728 if (!dim)
729 return NULL;
730 if (n == 0)
731 return isl_space_reset(dim, type);
732
733 if (!valid_dim_type(type))
734 isl_die(dim->ctx, isl_error_invalid,
735 "cannot insert dimensions of specified type",
736 goto error);
737
738 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
739
740 dim = isl_space_cow(dim);
741 if (!dim)
742 return NULL;
743
744 if (dim->ids) {
745 enum isl_dim_type t;
746 int off;
747 int s[3];
748 int *size = s - isl_dim_param;
749 ids = isl_calloc_array(dim->ctx, isl_id *,
750 dim->nparam + dim->n_in + dim->n_out + n);
751 if (!ids)
752 goto error;
753 off = 0;
754 size[isl_dim_param] = dim->nparam;
755 size[isl_dim_in] = dim->n_in;
756 size[isl_dim_out] = dim->n_out;
757 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
758 if (t != type) {
759 get_ids(dim, t, 0, size[t], ids + off);
760 off += size[t];
761 } else {
762 get_ids(dim, t, 0, pos, ids + off);
763 off += pos + n;
764 get_ids(dim, t, pos, size[t] - pos, ids + off);
765 off += size[t] - pos;
766 }
767 }
768 free(dim->ids);
769 dim->ids = ids;
770 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
771 }
772 switch (type) {
773 case isl_dim_param: dim->nparam += n; break;
774 case isl_dim_in: dim->n_in += n; break;
775 case isl_dim_out: dim->n_out += n; break;
776 default: ;
777 }
778 dim = isl_space_reset(dim, type);
779
780 return dim;
781 error:
782 isl_space_free(dim);
783 return NULL;
784 }
785
786 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
787 enum isl_dim_type dst_type, unsigned dst_pos,
788 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
789 {
790 int i;
791
792 if (!dim)
793 return NULL;
794 if (n == 0)
795 return dim;
796
797 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
798 goto error);
799
800 if (dst_type == src_type && dst_pos == src_pos)
801 return dim;
802
803 isl_assert(dim->ctx, dst_type != src_type, goto error);
804
805 dim = isl_space_reset(dim, src_type);
806 dim = isl_space_reset(dim, dst_type);
807
808 dim = isl_space_cow(dim);
809 if (!dim)
810 return NULL;
811
812 if (dim->ids) {
813 isl_id **ids;
814 enum isl_dim_type t;
815 int off;
816 int s[3];
817 int *size = s - isl_dim_param;
818 ids = isl_calloc_array(dim->ctx, isl_id *,
819 dim->nparam + dim->n_in + dim->n_out);
820 if (!ids)
821 goto error;
822 off = 0;
823 size[isl_dim_param] = dim->nparam;
824 size[isl_dim_in] = dim->n_in;
825 size[isl_dim_out] = dim->n_out;
826 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
827 if (t == dst_type) {
828 get_ids(dim, t, 0, dst_pos, ids + off);
829 off += dst_pos;
830 get_ids(dim, src_type, src_pos, n, ids + off);
831 off += n;
832 get_ids(dim, t, dst_pos, size[t] - dst_pos,
833 ids + off);
834 off += size[t] - dst_pos;
835 } else if (t == src_type) {
836 get_ids(dim, t, 0, src_pos, ids + off);
837 off += src_pos;
838 get_ids(dim, t, src_pos + n,
839 size[t] - src_pos - n, ids + off);
840 off += size[t] - src_pos - n;
841 } else {
842 get_ids(dim, t, 0, size[t], ids + off);
843 off += size[t];
844 }
845 }
846 free(dim->ids);
847 dim->ids = ids;
848 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
849 }
850
851 switch (dst_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
858 switch (src_type) {
859 case isl_dim_param: dim->nparam -= n; break;
860 case isl_dim_in: dim->n_in -= n; break;
861 case isl_dim_out: dim->n_out -= n; break;
862 default: ;
863 }
864
865 if (dst_type != isl_dim_param && src_type != isl_dim_param)
866 return dim;
867
868 for (i = 0; i < 2; ++i) {
869 if (!dim->nested[i])
870 continue;
871 dim->nested[i] = isl_space_replace(dim->nested[i],
872 isl_dim_param, dim);
873 if (!dim->nested[i])
874 goto error;
875 }
876
877 return dim;
878 error:
879 isl_space_free(dim);
880 return NULL;
881 }
882
883 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
884 __isl_take isl_space *right)
885 {
886 isl_space *dim;
887
888 if (!left || !right)
889 goto error;
890
891 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
892 goto error);
893 isl_assert(left->ctx,
894 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
895 goto error);
896
897 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
898 if (!dim)
899 goto error;
900
901 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
902 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
903 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
904
905 if (dim && left->tuple_id[0] &&
906 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
907 goto error;
908 if (dim && right->tuple_id[1] &&
909 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
910 goto error;
911 if (dim && left->nested[0] &&
912 !(dim->nested[0] = isl_space_copy(left->nested[0])))
913 goto error;
914 if (dim && right->nested[1] &&
915 !(dim->nested[1] = isl_space_copy(right->nested[1])))
916 goto error;
917
918 isl_space_free(left);
919 isl_space_free(right);
920
921 return dim;
922 error:
923 isl_space_free(left);
924 isl_space_free(right);
925 return NULL;
926 }
927
928 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
929 __isl_take isl_space *right)
930 {
931 isl_space *dom1, *dom2, *nest1, *nest2;
932
933 if (!left || !right)
934 goto error;
935
936 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
937 goto error);
938
939 dom1 = isl_space_domain(isl_space_copy(left));
940 dom2 = isl_space_domain(isl_space_copy(right));
941 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
942
943 dom1 = isl_space_range(left);
944 dom2 = isl_space_range(right);
945 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
946
947 return isl_space_join(isl_space_reverse(nest1), nest2);
948 error:
949 isl_space_free(left);
950 isl_space_free(right);
951 return NULL;
952 }
953
954 /* Given two spaces { A -> C } and { B -> C }, construct the space
955 * { [A -> B] -> C }
956 */
957 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
958 __isl_take isl_space *right)
959 {
960 isl_space *ran, *dom1, *dom2, *nest;
961
962 if (!left || !right)
963 goto error;
964
965 if (!match(left, isl_dim_param, right, isl_dim_param))
966 isl_die(left->ctx, isl_error_invalid,
967 "parameters need to match", goto error);
968 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
969 isl_die(left->ctx, isl_error_invalid,
970 "ranges need to match", goto error);
971
972 ran = isl_space_range(isl_space_copy(left));
973
974 dom1 = isl_space_domain(left);
975 dom2 = isl_space_domain(right);
976 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
977
978 return isl_space_join(isl_space_reverse(nest), ran);
979 error:
980 isl_space_free(left);
981 isl_space_free(right);
982 return NULL;
983 }
984
985 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
986 __isl_take isl_space *right)
987 {
988 isl_space *dom, *ran1, *ran2, *nest;
989
990 if (!left || !right)
991 goto error;
992
993 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
994 goto error);
995 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
996 isl_die(left->ctx, isl_error_invalid,
997 "domains need to match", goto error);
998
999 dom = isl_space_domain(isl_space_copy(left));
1000
1001 ran1 = isl_space_range(left);
1002 ran2 = isl_space_range(right);
1003 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1004
1005 return isl_space_join(isl_space_reverse(dom), nest);
1006 error:
1007 isl_space_free(left);
1008 isl_space_free(right);
1009 return NULL;
1010 }
1011
1012 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1013 {
1014 isl_ctx *ctx;
1015 isl_id **ids = NULL;
1016
1017 if (!dim)
1018 return NULL;
1019 ctx = isl_space_get_ctx(dim);
1020 if (!isl_space_is_set(dim))
1021 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1022 dim = isl_space_cow(dim);
1023 if (!dim)
1024 return NULL;
1025 if (dim->ids) {
1026 ids = isl_calloc_array(dim->ctx, isl_id *,
1027 dim->nparam + dim->n_out + dim->n_out);
1028 if (!ids)
1029 goto error;
1030 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1031 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1032 }
1033 dim->n_in = dim->n_out;
1034 if (ids) {
1035 free(dim->ids);
1036 dim->ids = ids;
1037 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1038 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1039 }
1040 isl_id_free(dim->tuple_id[0]);
1041 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1042 isl_space_free(dim->nested[0]);
1043 dim->nested[0] = isl_space_copy(dim->nested[1]);
1044 return dim;
1045 error:
1046 isl_space_free(dim);
1047 return NULL;
1048 }
1049
1050 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1051 enum isl_dim_type type,
1052 unsigned first, unsigned n, __isl_take isl_id **ids)
1053 {
1054 int i;
1055
1056 for (i = 0; i < n ; ++i)
1057 dim = set_id(dim, type, first + i, ids[i]);
1058
1059 return dim;
1060 }
1061
1062 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1063 {
1064 unsigned t;
1065 isl_space *nested;
1066 isl_id **ids = NULL;
1067 isl_id *id;
1068
1069 if (!dim)
1070 return NULL;
1071 if (match(dim, isl_dim_in, dim, isl_dim_out))
1072 return dim;
1073
1074 dim = isl_space_cow(dim);
1075 if (!dim)
1076 return NULL;
1077
1078 id = dim->tuple_id[0];
1079 dim->tuple_id[0] = dim->tuple_id[1];
1080 dim->tuple_id[1] = id;
1081
1082 nested = dim->nested[0];
1083 dim->nested[0] = dim->nested[1];
1084 dim->nested[1] = nested;
1085
1086 if (dim->ids) {
1087 ids = isl_alloc_array(dim->ctx, isl_id *,
1088 dim->n_in + dim->n_out);
1089 if (!ids)
1090 goto error;
1091 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1092 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1093 }
1094
1095 t = dim->n_in;
1096 dim->n_in = dim->n_out;
1097 dim->n_out = t;
1098
1099 if (dim->ids) {
1100 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1101 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1102 free(ids);
1103 }
1104
1105 return dim;
1106 error:
1107 free(ids);
1108 isl_space_free(dim);
1109 return NULL;
1110 }
1111
1112 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1113 enum isl_dim_type type, unsigned first, unsigned num)
1114 {
1115 int i;
1116
1117 if (!dim)
1118 return NULL;
1119
1120 if (num == 0)
1121 return isl_space_reset(dim, type);
1122
1123 if (!valid_dim_type(type))
1124 isl_die(dim->ctx, isl_error_invalid,
1125 "cannot drop dimensions of specified type", goto error);
1126
1127 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1128 dim = isl_space_cow(dim);
1129 if (!dim)
1130 goto error;
1131 if (dim->ids) {
1132 dim = extend_ids(dim);
1133 if (!dim)
1134 goto error;
1135 for (i = 0; i < num; ++i)
1136 isl_id_free(get_id(dim, type, first + i));
1137 for (i = first+num; i < n(dim, type); ++i)
1138 set_id(dim, type, i - num, get_id(dim, type, i));
1139 switch (type) {
1140 case isl_dim_param:
1141 get_ids(dim, isl_dim_in, 0, dim->n_in,
1142 dim->ids + offset(dim, isl_dim_in) - num);
1143 case isl_dim_in:
1144 get_ids(dim, isl_dim_out, 0, dim->n_out,
1145 dim->ids + offset(dim, isl_dim_out) - num);
1146 default:
1147 ;
1148 }
1149 dim->n_id -= num;
1150 }
1151 switch (type) {
1152 case isl_dim_param: dim->nparam -= num; break;
1153 case isl_dim_in: dim->n_in -= num; break;
1154 case isl_dim_out: dim->n_out -= num; break;
1155 default: ;
1156 }
1157 dim = isl_space_reset(dim, type);
1158 if (type == isl_dim_param) {
1159 if (dim && dim->nested[0] &&
1160 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1161 isl_dim_param, first, num)))
1162 goto error;
1163 if (dim && dim->nested[1] &&
1164 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1165 isl_dim_param, first, num)))
1166 goto error;
1167 }
1168 return dim;
1169 error:
1170 isl_space_free(dim);
1171 return NULL;
1172 }
1173
1174 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1175 unsigned first, unsigned n)
1176 {
1177 if (!dim)
1178 return NULL;
1179 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1180 }
1181
1182 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1183 unsigned first, unsigned n)
1184 {
1185 if (!dim)
1186 return NULL;
1187 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1188 }
1189
1190 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1191 {
1192 if (!dim)
1193 return NULL;
1194 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1195 dim = isl_space_reverse(dim);
1196 dim = mark_as_set(dim);
1197 return dim;
1198 }
1199
1200 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1201 {
1202 if (!dim)
1203 return NULL;
1204 if (!isl_space_is_set(dim))
1205 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1206 "not a set space", goto error);
1207 dim = isl_space_reverse(dim);
1208 dim = isl_space_reset(dim, isl_dim_out);
1209 return dim;
1210 error:
1211 isl_space_free(dim);
1212 return NULL;
1213 }
1214
1215 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1216 {
1217 if (!dim)
1218 return NULL;
1219 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1220 dim = mark_as_set(dim);
1221 return dim;
1222 }
1223
1224 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1225 {
1226 if (!dim)
1227 return NULL;
1228 if (!isl_space_is_set(dim))
1229 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1230 "not a set space", goto error);
1231 return isl_space_reset(dim, isl_dim_in);
1232 error:
1233 isl_space_free(dim);
1234 return NULL;
1235 }
1236
1237 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1238 {
1239 if (isl_space_is_params(space))
1240 return space;
1241 space = isl_space_drop_dims(space,
1242 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1243 space = isl_space_drop_dims(space,
1244 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1245 space = mark_as_params(space);
1246 return space;
1247 }
1248
1249 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1250 {
1251 dim = isl_space_cow(dim);
1252 if (!dim)
1253 return NULL;
1254
1255 dim->n_out += dim->n_in;
1256 dim->n_in = 0;
1257 dim = isl_space_reset(dim, isl_dim_in);
1258 dim = isl_space_reset(dim, isl_dim_out);
1259
1260 return dim;
1261 }
1262
1263 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1264 unsigned n_div)
1265 {
1266 int i;
1267
1268 if (!dim)
1269 return NULL;
1270 if (n_div == 0 &&
1271 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1272 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1273 dim = isl_space_cow(dim);
1274 if (!dim)
1275 return NULL;
1276 dim->n_out += dim->nparam + dim->n_in + n_div;
1277 dim->nparam = 0;
1278 dim->n_in = 0;
1279
1280 for (i = 0; i < dim->n_id; ++i)
1281 isl_id_free(get_id(dim, isl_dim_out, i));
1282 dim->n_id = 0;
1283 dim = isl_space_reset(dim, isl_dim_in);
1284 dim = isl_space_reset(dim, isl_dim_out);
1285
1286 return dim;
1287 }
1288
1289 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1290 {
1291 if (!dim1 || !dim2)
1292 return -1;
1293 if (dim1 == dim2)
1294 return 1;
1295 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1296 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1297 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1298 }
1299
1300 int isl_space_compatible(__isl_keep isl_space *dim1,
1301 __isl_keep isl_space *dim2)
1302 {
1303 return dim1->nparam == dim2->nparam &&
1304 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1305 }
1306
1307 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1308 {
1309 int i;
1310 isl_id *id;
1311
1312 if (!dim)
1313 return hash;
1314
1315 hash = isl_hash_builtin(hash, dim->nparam);
1316 hash = isl_hash_builtin(hash, dim->n_in);
1317 hash = isl_hash_builtin(hash, dim->n_out);
1318
1319 for (i = 0; i < dim->nparam; ++i) {
1320 id = get_id(dim, isl_dim_param, i);
1321 hash = isl_hash_id(hash, id);
1322 }
1323
1324 id = tuple_id(dim, isl_dim_in);
1325 hash = isl_hash_id(hash, id);
1326 id = tuple_id(dim, isl_dim_out);
1327 hash = isl_hash_id(hash, id);
1328
1329 hash = isl_hash_dim(hash, dim->nested[0]);
1330 hash = isl_hash_dim(hash, dim->nested[1]);
1331
1332 return hash;
1333 }
1334
1335 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1336 {
1337 uint32_t hash;
1338
1339 if (!dim)
1340 return 0;
1341
1342 hash = isl_hash_init();
1343 hash = isl_hash_dim(hash, dim);
1344
1345 return hash;
1346 }
1347
1348 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1349 {
1350 if (!dim)
1351 return -1;
1352
1353 if (!isl_space_is_set(dim))
1354 return 0;
1355
1356 return dim->nested[1] != NULL;
1357 }
1358
1359 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1360 {
1361 isl_space *wrap;
1362
1363 if (!dim)
1364 return NULL;
1365
1366 wrap = isl_space_set_alloc(dim->ctx,
1367 dim->nparam, dim->n_in + dim->n_out);
1368
1369 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1370 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1371 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1372
1373 if (!wrap)
1374 goto error;
1375
1376 wrap->nested[1] = dim;
1377
1378 return wrap;
1379 error:
1380 isl_space_free(dim);
1381 return NULL;
1382 }
1383
1384 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1385 {
1386 isl_space *unwrap;
1387
1388 if (!dim)
1389 return NULL;
1390
1391 if (!isl_space_is_wrapping(dim))
1392 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1393 goto error);
1394
1395 unwrap = isl_space_copy(dim->nested[1]);
1396 isl_space_free(dim);
1397
1398 return unwrap;
1399 error:
1400 isl_space_free(dim);
1401 return NULL;
1402 }
1403
1404 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1405 {
1406 if (type != isl_dim_in && type != isl_dim_out)
1407 return 0;
1408 if (!dim)
1409 return -1;
1410 if (dim->tuple_id[type - isl_dim_in])
1411 return 1;
1412 if (dim->nested[type - isl_dim_in])
1413 return 1;
1414 return 0;
1415 }
1416
1417 int isl_space_may_be_set(__isl_keep isl_space *dim)
1418 {
1419 if (!dim)
1420 return -1;
1421 if (isl_space_is_set(dim))
1422 return 1;
1423 if (isl_space_dim(dim, isl_dim_in) != 0)
1424 return 0;
1425 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1426 return 0;
1427 return 1;
1428 }
1429
1430 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1431 enum isl_dim_type type)
1432 {
1433 if (!isl_space_is_named_or_nested(dim, type))
1434 return dim;
1435
1436 dim = isl_space_cow(dim);
1437 if (!dim)
1438 return NULL;
1439
1440 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1441 dim->tuple_id[type - isl_dim_in] = NULL;
1442 isl_space_free(dim->nested[type - isl_dim_in]);
1443 dim->nested[type - isl_dim_in] = NULL;
1444
1445 return dim;
1446 }
1447
1448 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1449 {
1450 if (!dim)
1451 return NULL;
1452 if (!dim->nested[0] && !dim->nested[1])
1453 return dim;
1454
1455 if (dim->nested[0])
1456 dim = isl_space_reset(dim, isl_dim_in);
1457 if (dim && dim->nested[1])
1458 dim = isl_space_reset(dim, isl_dim_out);
1459
1460 return dim;
1461 }
1462
1463 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1464 {
1465 if (!dim)
1466 return NULL;
1467 if (!dim->nested[0])
1468 return dim;
1469
1470 return isl_space_reset(dim, isl_dim_in);
1471 }
1472
1473 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1474 {
1475 if (!dim)
1476 return NULL;
1477 if (!dim->nested[1])
1478 return dim;
1479
1480 return isl_space_reset(dim, isl_dim_out);
1481 }
1482
1483 /* Replace the dimensions of the given type of dst by those of src.
1484 */
1485 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1486 enum isl_dim_type type, __isl_keep isl_space *src)
1487 {
1488 dst = isl_space_cow(dst);
1489
1490 if (!dst || !src)
1491 goto error;
1492
1493 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1494 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1495 dst = copy_ids(dst, type, 0, src, type);
1496
1497 if (dst && type == isl_dim_param) {
1498 int i;
1499 for (i = 0; i <= 1; ++i) {
1500 if (!dst->nested[i])
1501 continue;
1502 dst->nested[i] = isl_space_replace(dst->nested[i],
1503 type, src);
1504 if (!dst->nested[i])
1505 goto error;
1506 }
1507 }
1508
1509 return dst;
1510 error:
1511 isl_space_free(dst);
1512 return NULL;
1513 }
1514
1515 /* Given a dimension specification "dim" of a set, create a dimension
1516 * specification for the lift of the set. In particular, the result
1517 * is of the form [dim -> local[..]], with n_local variables in the
1518 * range of the wrapped map.
1519 */
1520 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1521 {
1522 isl_space *local_dim;
1523
1524 if (!dim)
1525 return NULL;
1526
1527 local_dim = isl_space_dup(dim);
1528 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1529 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1530 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1531 dim = isl_space_join(isl_space_from_domain(dim),
1532 isl_space_from_range(local_dim));
1533 dim = isl_space_wrap(dim);
1534 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1535
1536 return dim;
1537 }
1538
1539 int isl_space_can_zip(__isl_keep isl_space *dim)
1540 {
1541 if (!dim)
1542 return -1;
1543
1544 return dim->nested[0] && dim->nested[1];
1545 }
1546
1547 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1548 {
1549 isl_space *dom, *ran;
1550 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1551
1552 if (!isl_space_can_zip(dim))
1553 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1554 goto error);
1555
1556 if (!dim)
1557 return 0;
1558 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1559 ran = isl_space_unwrap(isl_space_range(dim));
1560 dom_dom = isl_space_domain(isl_space_copy(dom));
1561 dom_ran = isl_space_range(dom);
1562 ran_dom = isl_space_domain(isl_space_copy(ran));
1563 ran_ran = isl_space_range(ran);
1564 dom = isl_space_join(isl_space_from_domain(dom_dom),
1565 isl_space_from_range(ran_dom));
1566 ran = isl_space_join(isl_space_from_domain(dom_ran),
1567 isl_space_from_range(ran_ran));
1568 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1569 isl_space_from_range(isl_space_wrap(ran)));
1570 error:
1571 isl_space_free(dim);
1572 return NULL;
1573 }
1574
1575 int isl_space_has_named_params(__isl_keep isl_space *dim)
1576 {
1577 int i;
1578 unsigned off;
1579
1580 if (!dim)
1581 return -1;
1582 if (dim->nparam == 0)
1583 return 1;
1584 off = isl_space_offset(dim, isl_dim_param);
1585 if (off + dim->nparam > dim->n_id)
1586 return 0;
1587 for (i = 0; i < dim->nparam; ++i)
1588 if (!dim->ids[off + i])
1589 return 0;
1590 return 1;
1591 }
1592
1593 /* Align the initial parameters of dim1 to match the order in dim2.
1594 */
1595 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
1596 __isl_take isl_space *dim2)
1597 {
1598 isl_reordering *exp;
1599
1600 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
1601 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
1602 "parameter alignment requires named parameters",
1603 goto error);
1604
1605 dim2 = isl_space_params(dim2);
1606 exp = isl_parameter_alignment_reordering(dim1, dim2);
1607 exp = isl_reordering_extend_space(exp, dim1);
1608 isl_space_free(dim2);
1609 if (!exp)
1610 return NULL;
1611 dim1 = isl_space_copy(exp->dim);
1612 isl_reordering_free(exp);
1613 return dim1;
1614 error:
1615 isl_space_free(dim1);
1616 isl_space_free(dim2);
1617 return NULL;
1618 }
Integer set library