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Merge branch 'maint'
[isl.git] / isl_space.c
blobae68013b3ee558c0b5089cc241b6111125a339bf
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 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
547 enum isl_dim_type type, const char *name)
548 {
549 int i;
550 int offset;
551 int n;
552
553 if (!space || !name)
554 return -1;
555
556 offset = isl_space_offset(space, type);
557 n = isl_space_dim(space, type);
558 for (i = 0; i < n && offset + i < space->n_id; ++i)
559 if (space->ids[offset + i]->name &&
560 !strcmp(space->ids[offset + i]->name, name))
561 return i;
562
563 return -1;
564 }
565
566 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
567 enum isl_dim_type type)
568 {
569 if (!dim)
570 return NULL;
571 if (type == isl_dim_in)
572 return dim->tuple_id[0];
573 if (type == isl_dim_out)
574 return dim->tuple_id[1];
575 return NULL;
576 }
577
578 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
579 enum isl_dim_type type)
580 {
581 if (!dim)
582 return NULL;
583 if (type == isl_dim_in)
584 return dim->nested[0];
585 if (type == isl_dim_out)
586 return dim->nested[1];
587 return NULL;
588 }
589
590 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
591 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
592 {
593 isl_id *id1, *id2;
594 isl_space *nested1, *nested2;
595
596 if (!dim1 || !dim2)
597 return -1;
598
599 if (dim1 == dim2 && dim1_type == dim2_type)
600 return 1;
601
602 if (n(dim1, dim1_type) != n(dim2, dim2_type))
603 return 0;
604 id1 = tuple_id(dim1, dim1_type);
605 id2 = tuple_id(dim2, dim2_type);
606 if (!id1 ^ !id2)
607 return 0;
608 if (id1 && id1 != id2)
609 return 0;
610 nested1 = nested(dim1, dim1_type);
611 nested2 = nested(dim2, dim2_type);
612 if (!nested1 ^ !nested2)
613 return 0;
614 if (nested1 && !isl_space_is_equal(nested1, nested2))
615 return 0;
616 return 1;
617 }
618
619 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
620 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
621 {
622 int i;
623
624 if (dim1 == dim2 && dim1_type == dim2_type)
625 return 1;
626
627 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
628 return 0;
629
630 if (!dim1->ids && !dim2->ids)
631 return 1;
632
633 for (i = 0; i < n(dim1, dim1_type); ++i) {
634 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
635 return 0;
636 }
637 return 1;
638 }
639
640 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
641 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
642 {
643 if (!dim1 || !dim2)
644 return -1;
645
646 return match(dim1, dim1_type, dim2, dim2_type);
647 }
648
649 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
650 unsigned first, unsigned n, __isl_keep isl_id **ids)
651 {
652 int i;
653
654 for (i = 0; i < n ; ++i)
655 ids[i] = get_id(dim, type, first + i);
656 }
657
658 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
659 unsigned nparam, unsigned n_in, unsigned n_out)
660 {
661 isl_id **ids = NULL;
662
663 if (!dim)
664 return NULL;
665 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
666 return dim;
667
668 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
669 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
670 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
671
672 dim = isl_space_cow(dim);
673
674 if (dim->ids) {
675 ids = isl_calloc_array(dim->ctx, isl_id *,
676 nparam + n_in + n_out);
677 if (!ids)
678 goto error;
679 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
680 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
681 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
682 free(dim->ids);
683 dim->ids = ids;
684 dim->n_id = nparam + n_in + n_out;
685 }
686 dim->nparam = nparam;
687 dim->n_in = n_in;
688 dim->n_out = n_out;
689
690 return dim;
691 error:
692 free(ids);
693 isl_space_free(dim);
694 return NULL;
695 }
696
697 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
698 enum isl_dim_type type, unsigned n)
699 {
700 if (!dim)
701 return NULL;
702 dim = isl_space_reset(dim, type);
703 switch (type) {
704 case isl_dim_param:
705 dim = isl_space_extend(dim,
706 dim->nparam + n, dim->n_in, dim->n_out);
707 if (dim && dim->nested[0] &&
708 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
709 isl_dim_param, n)))
710 goto error;
711 if (dim && dim->nested[1] &&
712 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
713 isl_dim_param, n)))
714 goto error;
715 return dim;
716 case isl_dim_in:
717 return isl_space_extend(dim,
718 dim->nparam, dim->n_in + n, dim->n_out);
719 case isl_dim_out:
720 return isl_space_extend(dim,
721 dim->nparam, dim->n_in, dim->n_out + n);
722 default:
723 isl_die(dim->ctx, isl_error_invalid,
724 "cannot add dimensions of specified type", goto error);
725 }
726 error:
727 isl_space_free(dim);
728 return NULL;
729 }
730
731 static int valid_dim_type(enum isl_dim_type type)
732 {
733 switch (type) {
734 case isl_dim_param:
735 case isl_dim_in:
736 case isl_dim_out:
737 return 1;
738 default:
739 return 0;
740 }
741 }
742
743 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
744 enum isl_dim_type type, unsigned pos, unsigned n)
745 {
746 isl_id **ids = NULL;
747
748 if (!dim)
749 return NULL;
750 if (n == 0)
751 return isl_space_reset(dim, type);
752
753 if (!valid_dim_type(type))
754 isl_die(dim->ctx, isl_error_invalid,
755 "cannot insert dimensions of specified type",
756 goto error);
757
758 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
759
760 dim = isl_space_cow(dim);
761 if (!dim)
762 return NULL;
763
764 if (dim->ids) {
765 enum isl_dim_type t;
766 int off;
767 int s[3];
768 int *size = s - isl_dim_param;
769 ids = isl_calloc_array(dim->ctx, isl_id *,
770 dim->nparam + dim->n_in + dim->n_out + n);
771 if (!ids)
772 goto error;
773 off = 0;
774 size[isl_dim_param] = dim->nparam;
775 size[isl_dim_in] = dim->n_in;
776 size[isl_dim_out] = dim->n_out;
777 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
778 if (t != type) {
779 get_ids(dim, t, 0, size[t], ids + off);
780 off += size[t];
781 } else {
782 get_ids(dim, t, 0, pos, ids + off);
783 off += pos + n;
784 get_ids(dim, t, pos, size[t] - pos, ids + off);
785 off += size[t] - pos;
786 }
787 }
788 free(dim->ids);
789 dim->ids = ids;
790 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
791 }
792 switch (type) {
793 case isl_dim_param: dim->nparam += n; break;
794 case isl_dim_in: dim->n_in += n; break;
795 case isl_dim_out: dim->n_out += n; break;
796 default: ;
797 }
798 dim = isl_space_reset(dim, type);
799
800 return dim;
801 error:
802 isl_space_free(dim);
803 return NULL;
804 }
805
806 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
807 enum isl_dim_type dst_type, unsigned dst_pos,
808 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
809 {
810 int i;
811
812 if (!dim)
813 return NULL;
814 if (n == 0)
815 return dim;
816
817 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
818 goto error);
819
820 if (dst_type == src_type && dst_pos == src_pos)
821 return dim;
822
823 isl_assert(dim->ctx, dst_type != src_type, goto error);
824
825 dim = isl_space_reset(dim, src_type);
826 dim = isl_space_reset(dim, dst_type);
827
828 dim = isl_space_cow(dim);
829 if (!dim)
830 return NULL;
831
832 if (dim->ids) {
833 isl_id **ids;
834 enum isl_dim_type t;
835 int off;
836 int s[3];
837 int *size = s - isl_dim_param;
838 ids = isl_calloc_array(dim->ctx, isl_id *,
839 dim->nparam + dim->n_in + dim->n_out);
840 if (!ids)
841 goto error;
842 off = 0;
843 size[isl_dim_param] = dim->nparam;
844 size[isl_dim_in] = dim->n_in;
845 size[isl_dim_out] = dim->n_out;
846 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
847 if (t == dst_type) {
848 get_ids(dim, t, 0, dst_pos, ids + off);
849 off += dst_pos;
850 get_ids(dim, src_type, src_pos, n, ids + off);
851 off += n;
852 get_ids(dim, t, dst_pos, size[t] - dst_pos,
853 ids + off);
854 off += size[t] - dst_pos;
855 } else if (t == src_type) {
856 get_ids(dim, t, 0, src_pos, ids + off);
857 off += src_pos;
858 get_ids(dim, t, src_pos + n,
859 size[t] - src_pos - n, ids + off);
860 off += size[t] - src_pos - n;
861 } else {
862 get_ids(dim, t, 0, size[t], ids + off);
863 off += size[t];
864 }
865 }
866 free(dim->ids);
867 dim->ids = ids;
868 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
869 }
870
871 switch (dst_type) {
872 case isl_dim_param: dim->nparam += n; break;
873 case isl_dim_in: dim->n_in += n; break;
874 case isl_dim_out: dim->n_out += n; break;
875 default: ;
876 }
877
878 switch (src_type) {
879 case isl_dim_param: dim->nparam -= n; break;
880 case isl_dim_in: dim->n_in -= n; break;
881 case isl_dim_out: dim->n_out -= n; break;
882 default: ;
883 }
884
885 if (dst_type != isl_dim_param && src_type != isl_dim_param)
886 return dim;
887
888 for (i = 0; i < 2; ++i) {
889 if (!dim->nested[i])
890 continue;
891 dim->nested[i] = isl_space_replace(dim->nested[i],
892 isl_dim_param, dim);
893 if (!dim->nested[i])
894 goto error;
895 }
896
897 return dim;
898 error:
899 isl_space_free(dim);
900 return NULL;
901 }
902
903 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
904 __isl_take isl_space *right)
905 {
906 isl_space *dim;
907
908 if (!left || !right)
909 goto error;
910
911 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
912 goto error);
913 isl_assert(left->ctx,
914 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
915 goto error);
916
917 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
918 if (!dim)
919 goto error;
920
921 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
922 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
923 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
924
925 if (dim && left->tuple_id[0] &&
926 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
927 goto error;
928 if (dim && right->tuple_id[1] &&
929 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
930 goto error;
931 if (dim && left->nested[0] &&
932 !(dim->nested[0] = isl_space_copy(left->nested[0])))
933 goto error;
934 if (dim && right->nested[1] &&
935 !(dim->nested[1] = isl_space_copy(right->nested[1])))
936 goto error;
937
938 isl_space_free(left);
939 isl_space_free(right);
940
941 return dim;
942 error:
943 isl_space_free(left);
944 isl_space_free(right);
945 return NULL;
946 }
947
948 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
949 __isl_take isl_space *right)
950 {
951 isl_space *dom1, *dom2, *nest1, *nest2;
952
953 if (!left || !right)
954 goto error;
955
956 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
957 goto error);
958
959 dom1 = isl_space_domain(isl_space_copy(left));
960 dom2 = isl_space_domain(isl_space_copy(right));
961 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
962
963 dom1 = isl_space_range(left);
964 dom2 = isl_space_range(right);
965 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
966
967 return isl_space_join(isl_space_reverse(nest1), nest2);
968 error:
969 isl_space_free(left);
970 isl_space_free(right);
971 return NULL;
972 }
973
974 /* Given two spaces { A -> C } and { B -> C }, construct the space
975 * { [A -> B] -> C }
976 */
977 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
978 __isl_take isl_space *right)
979 {
980 isl_space *ran, *dom1, *dom2, *nest;
981
982 if (!left || !right)
983 goto error;
984
985 if (!match(left, isl_dim_param, right, isl_dim_param))
986 isl_die(left->ctx, isl_error_invalid,
987 "parameters need to match", goto error);
988 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
989 isl_die(left->ctx, isl_error_invalid,
990 "ranges need to match", goto error);
991
992 ran = isl_space_range(isl_space_copy(left));
993
994 dom1 = isl_space_domain(left);
995 dom2 = isl_space_domain(right);
996 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
997
998 return isl_space_join(isl_space_reverse(nest), ran);
999 error:
1000 isl_space_free(left);
1001 isl_space_free(right);
1002 return NULL;
1003 }
1004
1005 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1006 __isl_take isl_space *right)
1007 {
1008 isl_space *dom, *ran1, *ran2, *nest;
1009
1010 if (!left || !right)
1011 goto error;
1012
1013 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1014 goto error);
1015 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1016 isl_die(left->ctx, isl_error_invalid,
1017 "domains need to match", goto error);
1018
1019 dom = isl_space_domain(isl_space_copy(left));
1020
1021 ran1 = isl_space_range(left);
1022 ran2 = isl_space_range(right);
1023 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1024
1025 return isl_space_join(isl_space_reverse(dom), nest);
1026 error:
1027 isl_space_free(left);
1028 isl_space_free(right);
1029 return NULL;
1030 }
1031
1032 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1033 {
1034 isl_ctx *ctx;
1035 isl_id **ids = NULL;
1036
1037 if (!dim)
1038 return NULL;
1039 ctx = isl_space_get_ctx(dim);
1040 if (!isl_space_is_set(dim))
1041 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1042 dim = isl_space_cow(dim);
1043 if (!dim)
1044 return NULL;
1045 if (dim->ids) {
1046 ids = isl_calloc_array(dim->ctx, isl_id *,
1047 dim->nparam + dim->n_out + dim->n_out);
1048 if (!ids)
1049 goto error;
1050 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1051 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1052 }
1053 dim->n_in = dim->n_out;
1054 if (ids) {
1055 free(dim->ids);
1056 dim->ids = ids;
1057 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1058 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1059 }
1060 isl_id_free(dim->tuple_id[0]);
1061 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1062 isl_space_free(dim->nested[0]);
1063 dim->nested[0] = isl_space_copy(dim->nested[1]);
1064 return dim;
1065 error:
1066 isl_space_free(dim);
1067 return NULL;
1068 }
1069
1070 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1071 enum isl_dim_type type,
1072 unsigned first, unsigned n, __isl_take isl_id **ids)
1073 {
1074 int i;
1075
1076 for (i = 0; i < n ; ++i)
1077 dim = set_id(dim, type, first + i, ids[i]);
1078
1079 return dim;
1080 }
1081
1082 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1083 {
1084 unsigned t;
1085 isl_space *nested;
1086 isl_id **ids = NULL;
1087 isl_id *id;
1088
1089 if (!dim)
1090 return NULL;
1091 if (match(dim, isl_dim_in, dim, isl_dim_out))
1092 return dim;
1093
1094 dim = isl_space_cow(dim);
1095 if (!dim)
1096 return NULL;
1097
1098 id = dim->tuple_id[0];
1099 dim->tuple_id[0] = dim->tuple_id[1];
1100 dim->tuple_id[1] = id;
1101
1102 nested = dim->nested[0];
1103 dim->nested[0] = dim->nested[1];
1104 dim->nested[1] = nested;
1105
1106 if (dim->ids) {
1107 ids = isl_alloc_array(dim->ctx, isl_id *,
1108 dim->n_in + dim->n_out);
1109 if (!ids)
1110 goto error;
1111 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1112 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1113 }
1114
1115 t = dim->n_in;
1116 dim->n_in = dim->n_out;
1117 dim->n_out = t;
1118
1119 if (dim->ids) {
1120 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1121 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1122 free(ids);
1123 }
1124
1125 return dim;
1126 error:
1127 free(ids);
1128 isl_space_free(dim);
1129 return NULL;
1130 }
1131
1132 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1133 enum isl_dim_type type, unsigned first, unsigned num)
1134 {
1135 int i;
1136
1137 if (!dim)
1138 return NULL;
1139
1140 if (num == 0)
1141 return isl_space_reset(dim, type);
1142
1143 if (!valid_dim_type(type))
1144 isl_die(dim->ctx, isl_error_invalid,
1145 "cannot drop dimensions of specified type", goto error);
1146
1147 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1148 dim = isl_space_cow(dim);
1149 if (!dim)
1150 goto error;
1151 if (dim->ids) {
1152 dim = extend_ids(dim);
1153 if (!dim)
1154 goto error;
1155 for (i = 0; i < num; ++i)
1156 isl_id_free(get_id(dim, type, first + i));
1157 for (i = first+num; i < n(dim, type); ++i)
1158 set_id(dim, type, i - num, get_id(dim, type, i));
1159 switch (type) {
1160 case isl_dim_param:
1161 get_ids(dim, isl_dim_in, 0, dim->n_in,
1162 dim->ids + offset(dim, isl_dim_in) - num);
1163 case isl_dim_in:
1164 get_ids(dim, isl_dim_out, 0, dim->n_out,
1165 dim->ids + offset(dim, isl_dim_out) - num);
1166 default:
1167 ;
1168 }
1169 dim->n_id -= num;
1170 }
1171 switch (type) {
1172 case isl_dim_param: dim->nparam -= num; break;
1173 case isl_dim_in: dim->n_in -= num; break;
1174 case isl_dim_out: dim->n_out -= num; break;
1175 default: ;
1176 }
1177 dim = isl_space_reset(dim, type);
1178 if (type == isl_dim_param) {
1179 if (dim && dim->nested[0] &&
1180 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1181 isl_dim_param, first, num)))
1182 goto error;
1183 if (dim && dim->nested[1] &&
1184 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1185 isl_dim_param, first, num)))
1186 goto error;
1187 }
1188 return dim;
1189 error:
1190 isl_space_free(dim);
1191 return NULL;
1192 }
1193
1194 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1195 unsigned first, unsigned n)
1196 {
1197 if (!dim)
1198 return NULL;
1199 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1200 }
1201
1202 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1203 unsigned first, unsigned n)
1204 {
1205 if (!dim)
1206 return NULL;
1207 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1208 }
1209
1210 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1211 {
1212 if (!dim)
1213 return NULL;
1214 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1215 dim = isl_space_reverse(dim);
1216 dim = mark_as_set(dim);
1217 return dim;
1218 }
1219
1220 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1221 {
1222 if (!dim)
1223 return NULL;
1224 if (!isl_space_is_set(dim))
1225 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1226 "not a set space", goto error);
1227 dim = isl_space_reverse(dim);
1228 dim = isl_space_reset(dim, isl_dim_out);
1229 return dim;
1230 error:
1231 isl_space_free(dim);
1232 return NULL;
1233 }
1234
1235 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1236 {
1237 if (!dim)
1238 return NULL;
1239 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1240 dim = mark_as_set(dim);
1241 return dim;
1242 }
1243
1244 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1245 {
1246 if (!dim)
1247 return NULL;
1248 if (!isl_space_is_set(dim))
1249 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1250 "not a set space", goto error);
1251 return isl_space_reset(dim, isl_dim_in);
1252 error:
1253 isl_space_free(dim);
1254 return NULL;
1255 }
1256
1257 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1258 {
1259 if (isl_space_is_params(space))
1260 return space;
1261 space = isl_space_drop_dims(space,
1262 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1263 space = isl_space_drop_dims(space,
1264 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1265 space = mark_as_params(space);
1266 return space;
1267 }
1268
1269 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1270 {
1271 if (!space)
1272 return NULL;
1273 if (!isl_space_is_params(space))
1274 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1275 "not a parameter space", goto error);
1276 return isl_space_reset(space, isl_dim_set);
1277 error:
1278 isl_space_free(space);
1279 return NULL;
1280 }
1281
1282 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1283 {
1284 dim = isl_space_cow(dim);
1285 if (!dim)
1286 return NULL;
1287
1288 dim->n_out += dim->n_in;
1289 dim->n_in = 0;
1290 dim = isl_space_reset(dim, isl_dim_in);
1291 dim = isl_space_reset(dim, isl_dim_out);
1292
1293 return dim;
1294 }
1295
1296 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1297 unsigned n_div)
1298 {
1299 int i;
1300
1301 if (!dim)
1302 return NULL;
1303 if (n_div == 0 &&
1304 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1305 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1306 dim = isl_space_cow(dim);
1307 if (!dim)
1308 return NULL;
1309 dim->n_out += dim->nparam + dim->n_in + n_div;
1310 dim->nparam = 0;
1311 dim->n_in = 0;
1312
1313 for (i = 0; i < dim->n_id; ++i)
1314 isl_id_free(get_id(dim, isl_dim_out, i));
1315 dim->n_id = 0;
1316 dim = isl_space_reset(dim, isl_dim_in);
1317 dim = isl_space_reset(dim, isl_dim_out);
1318
1319 return dim;
1320 }
1321
1322 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1323 {
1324 if (!dim1 || !dim2)
1325 return -1;
1326 if (dim1 == dim2)
1327 return 1;
1328 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1329 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1330 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1331 }
1332
1333 /* Is space1 equal to the domain of space2?
1334 */
1335 int isl_space_is_domain(__isl_keep isl_space *space1,
1336 __isl_keep isl_space *space2)
1337 {
1338 if (!space1 || !space2)
1339 return -1;
1340 if (!isl_space_is_set(space1))
1341 return 0;
1342 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1343 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1344 }
1345
1346 int isl_space_compatible(__isl_keep isl_space *dim1,
1347 __isl_keep isl_space *dim2)
1348 {
1349 return dim1->nparam == dim2->nparam &&
1350 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1351 }
1352
1353 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1354 {
1355 int i;
1356 isl_id *id;
1357
1358 if (!dim)
1359 return hash;
1360
1361 hash = isl_hash_builtin(hash, dim->nparam);
1362 hash = isl_hash_builtin(hash, dim->n_in);
1363 hash = isl_hash_builtin(hash, dim->n_out);
1364
1365 for (i = 0; i < dim->nparam; ++i) {
1366 id = get_id(dim, isl_dim_param, i);
1367 hash = isl_hash_id(hash, id);
1368 }
1369
1370 id = tuple_id(dim, isl_dim_in);
1371 hash = isl_hash_id(hash, id);
1372 id = tuple_id(dim, isl_dim_out);
1373 hash = isl_hash_id(hash, id);
1374
1375 hash = isl_hash_dim(hash, dim->nested[0]);
1376 hash = isl_hash_dim(hash, dim->nested[1]);
1377
1378 return hash;
1379 }
1380
1381 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1382 {
1383 uint32_t hash;
1384
1385 if (!dim)
1386 return 0;
1387
1388 hash = isl_hash_init();
1389 hash = isl_hash_dim(hash, dim);
1390
1391 return hash;
1392 }
1393
1394 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1395 {
1396 if (!dim)
1397 return -1;
1398
1399 if (!isl_space_is_set(dim))
1400 return 0;
1401
1402 return dim->nested[1] != NULL;
1403 }
1404
1405 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1406 {
1407 isl_space *wrap;
1408
1409 if (!dim)
1410 return NULL;
1411
1412 wrap = isl_space_set_alloc(dim->ctx,
1413 dim->nparam, dim->n_in + dim->n_out);
1414
1415 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1416 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1417 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1418
1419 if (!wrap)
1420 goto error;
1421
1422 wrap->nested[1] = dim;
1423
1424 return wrap;
1425 error:
1426 isl_space_free(dim);
1427 return NULL;
1428 }
1429
1430 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1431 {
1432 isl_space *unwrap;
1433
1434 if (!dim)
1435 return NULL;
1436
1437 if (!isl_space_is_wrapping(dim))
1438 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1439 goto error);
1440
1441 unwrap = isl_space_copy(dim->nested[1]);
1442 isl_space_free(dim);
1443
1444 return unwrap;
1445 error:
1446 isl_space_free(dim);
1447 return NULL;
1448 }
1449
1450 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1451 {
1452 if (type != isl_dim_in && type != isl_dim_out)
1453 return 0;
1454 if (!dim)
1455 return -1;
1456 if (dim->tuple_id[type - isl_dim_in])
1457 return 1;
1458 if (dim->nested[type - isl_dim_in])
1459 return 1;
1460 return 0;
1461 }
1462
1463 int isl_space_may_be_set(__isl_keep isl_space *dim)
1464 {
1465 if (!dim)
1466 return -1;
1467 if (isl_space_is_set(dim))
1468 return 1;
1469 if (isl_space_dim(dim, isl_dim_in) != 0)
1470 return 0;
1471 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1472 return 0;
1473 return 1;
1474 }
1475
1476 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1477 enum isl_dim_type type)
1478 {
1479 if (!isl_space_is_named_or_nested(dim, type))
1480 return dim;
1481
1482 dim = isl_space_cow(dim);
1483 if (!dim)
1484 return NULL;
1485
1486 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1487 dim->tuple_id[type - isl_dim_in] = NULL;
1488 isl_space_free(dim->nested[type - isl_dim_in]);
1489 dim->nested[type - isl_dim_in] = NULL;
1490
1491 return dim;
1492 }
1493
1494 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1495 {
1496 if (!dim)
1497 return NULL;
1498 if (!dim->nested[0] && !dim->nested[1])
1499 return dim;
1500
1501 if (dim->nested[0])
1502 dim = isl_space_reset(dim, isl_dim_in);
1503 if (dim && dim->nested[1])
1504 dim = isl_space_reset(dim, isl_dim_out);
1505
1506 return dim;
1507 }
1508
1509 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1510 {
1511 if (!dim)
1512 return NULL;
1513 if (!dim->nested[0])
1514 return dim;
1515
1516 return isl_space_reset(dim, isl_dim_in);
1517 }
1518
1519 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1520 {
1521 if (!dim)
1522 return NULL;
1523 if (!dim->nested[1])
1524 return dim;
1525
1526 return isl_space_reset(dim, isl_dim_out);
1527 }
1528
1529 /* Replace the dimensions of the given type of dst by those of src.
1530 */
1531 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1532 enum isl_dim_type type, __isl_keep isl_space *src)
1533 {
1534 dst = isl_space_cow(dst);
1535
1536 if (!dst || !src)
1537 goto error;
1538
1539 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1540 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1541 dst = copy_ids(dst, type, 0, src, type);
1542
1543 if (dst && type == isl_dim_param) {
1544 int i;
1545 for (i = 0; i <= 1; ++i) {
1546 if (!dst->nested[i])
1547 continue;
1548 dst->nested[i] = isl_space_replace(dst->nested[i],
1549 type, src);
1550 if (!dst->nested[i])
1551 goto error;
1552 }
1553 }
1554
1555 return dst;
1556 error:
1557 isl_space_free(dst);
1558 return NULL;
1559 }
1560
1561 /* Given a dimension specification "dim" of a set, create a dimension
1562 * specification for the lift of the set. In particular, the result
1563 * is of the form [dim -> local[..]], with n_local variables in the
1564 * range of the wrapped map.
1565 */
1566 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1567 {
1568 isl_space *local_dim;
1569
1570 if (!dim)
1571 return NULL;
1572
1573 local_dim = isl_space_dup(dim);
1574 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1575 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1576 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1577 dim = isl_space_join(isl_space_from_domain(dim),
1578 isl_space_from_range(local_dim));
1579 dim = isl_space_wrap(dim);
1580 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1581
1582 return dim;
1583 }
1584
1585 int isl_space_can_zip(__isl_keep isl_space *dim)
1586 {
1587 if (!dim)
1588 return -1;
1589
1590 return dim->nested[0] && dim->nested[1];
1591 }
1592
1593 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1594 {
1595 isl_space *dom, *ran;
1596 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1597
1598 if (!isl_space_can_zip(dim))
1599 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1600 goto error);
1601
1602 if (!dim)
1603 return 0;
1604 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1605 ran = isl_space_unwrap(isl_space_range(dim));
1606 dom_dom = isl_space_domain(isl_space_copy(dom));
1607 dom_ran = isl_space_range(dom);
1608 ran_dom = isl_space_domain(isl_space_copy(ran));
1609 ran_ran = isl_space_range(ran);
1610 dom = isl_space_join(isl_space_from_domain(dom_dom),
1611 isl_space_from_range(ran_dom));
1612 ran = isl_space_join(isl_space_from_domain(dom_ran),
1613 isl_space_from_range(ran_ran));
1614 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1615 isl_space_from_range(isl_space_wrap(ran)));
1616 error:
1617 isl_space_free(dim);
1618 return NULL;
1619 }
1620
1621 int isl_space_has_named_params(__isl_keep isl_space *dim)
1622 {
1623 int i;
1624 unsigned off;
1625
1626 if (!dim)
1627 return -1;
1628 if (dim->nparam == 0)
1629 return 1;
1630 off = isl_space_offset(dim, isl_dim_param);
1631 if (off + dim->nparam > dim->n_id)
1632 return 0;
1633 for (i = 0; i < dim->nparam; ++i)
1634 if (!dim->ids[off + i])
1635 return 0;
1636 return 1;
1637 }
1638
1639 /* Align the initial parameters of dim1 to match the order in dim2.
1640 */
1641 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
1642 __isl_take isl_space *dim2)
1643 {
1644 isl_reordering *exp;
1645
1646 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
1647 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
1648 "parameter alignment requires named parameters",
1649 goto error);
1650
1651 dim2 = isl_space_params(dim2);
1652 exp = isl_parameter_alignment_reordering(dim1, dim2);
1653 exp = isl_reordering_extend_space(exp, dim1);
1654 isl_space_free(dim2);
1655 if (!exp)
1656 return NULL;
1657 dim1 = isl_space_copy(exp->dim);
1658 isl_reordering_free(exp);
1659 return dim1;
1660 error:
1661 isl_space_free(dim1);
1662 isl_space_free(dim2);
1663 return NULL;
1664 }
1665
1666 /* Given the space of set (domain), construct a space for a map
1667 * with as domain the given space and as range the range of "model".
1668 */
1669 __isl_give isl_space *isl_space_extend_domain_with_range(
1670 __isl_take isl_space *domain, __isl_take isl_space *model)
1671 {
1672 isl_space *space;
1673
1674 space = isl_space_from_domain(domain);
1675 space = isl_space_add_dims(space, isl_dim_out,
1676 isl_space_dim(model, isl_dim_out));
1677 if (isl_space_has_tuple_id(model, isl_dim_out))
1678 space = isl_space_set_tuple_id(space, isl_dim_out,
1679 isl_space_get_tuple_id(model, isl_dim_out));
1680 isl_space_free(model);
1681 return space;
1682 }
Integer set library