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rename PW_alloc_ to PW_alloc_size
[isl.git] / isl_space.c
blob853d55193435b75afbfe5cfc83abcf33cf77e116
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 __isl_give isl_space *isl_space_set_alloc(isl_ctx *ctx,
52 unsigned nparam, unsigned dim)
53 {
54 return isl_space_alloc(ctx, nparam, 0, dim);
55 }
56
57 static unsigned global_pos(__isl_keep isl_space *dim,
58 enum isl_dim_type type, unsigned pos)
59 {
60 struct isl_ctx *ctx = dim->ctx;
61
62 switch (type) {
63 case isl_dim_param:
64 isl_assert(ctx, pos < dim->nparam,
65 return isl_space_dim(dim, isl_dim_all));
66 return pos;
67 case isl_dim_in:
68 isl_assert(ctx, pos < dim->n_in,
69 return isl_space_dim(dim, isl_dim_all));
70 return pos + dim->nparam;
71 case isl_dim_out:
72 isl_assert(ctx, pos < dim->n_out,
73 return isl_space_dim(dim, isl_dim_all));
74 return pos + dim->nparam + dim->n_in;
75 default:
76 isl_assert(ctx, 0, return isl_space_dim(dim, isl_dim_all));
77 }
78 return isl_space_dim(dim, isl_dim_all);
79 }
80
81 /* Extend length of ids array to the total number of dimensions.
82 */
83 static __isl_give isl_space *extend_ids(__isl_take isl_space *dim)
84 {
85 isl_id **ids;
86 int i;
87
88 if (isl_space_dim(dim, isl_dim_all) <= dim->n_id)
89 return dim;
90
91 if (!dim->ids) {
92 dim->ids = isl_calloc_array(dim->ctx,
93 isl_id *, isl_space_dim(dim, isl_dim_all));
94 if (!dim->ids)
95 goto error;
96 } else {
97 ids = isl_realloc_array(dim->ctx, dim->ids,
98 isl_id *, isl_space_dim(dim, isl_dim_all));
99 if (!ids)
100 goto error;
101 dim->ids = ids;
102 for (i = dim->n_id; i < isl_space_dim(dim, isl_dim_all); ++i)
103 dim->ids[i] = NULL;
104 }
105
106 dim->n_id = isl_space_dim(dim, isl_dim_all);
107
108 return dim;
109 error:
110 isl_space_free(dim);
111 return NULL;
112 }
113
114 static __isl_give isl_space *set_id(__isl_take isl_space *dim,
115 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
116 {
117 dim = isl_space_cow(dim);
118
119 if (!dim)
120 goto error;
121
122 pos = global_pos(dim, type, pos);
123 if (pos == isl_space_dim(dim, isl_dim_all))
124 goto error;
125
126 if (pos >= dim->n_id) {
127 if (!id)
128 return dim;
129 dim = extend_ids(dim);
130 if (!dim)
131 goto error;
132 }
133
134 dim->ids[pos] = id;
135
136 return dim;
137 error:
138 isl_id_free(id);
139 isl_space_free(dim);
140 return NULL;
141 }
142
143 static __isl_keep isl_id *get_id(__isl_keep isl_space *dim,
144 enum isl_dim_type type, unsigned pos)
145 {
146 if (!dim)
147 return NULL;
148
149 pos = global_pos(dim, type, pos);
150 if (pos == isl_space_dim(dim, isl_dim_all))
151 return NULL;
152 if (pos >= dim->n_id)
153 return NULL;
154 return dim->ids[pos];
155 }
156
157 static unsigned offset(__isl_keep isl_space *dim, enum isl_dim_type type)
158 {
159 switch (type) {
160 case isl_dim_param: return 0;
161 case isl_dim_in: return dim->nparam;
162 case isl_dim_out: return dim->nparam + dim->n_in;
163 default: return 0;
164 }
165 }
166
167 static unsigned n(__isl_keep isl_space *dim, enum isl_dim_type type)
168 {
169 switch (type) {
170 case isl_dim_param: return dim->nparam;
171 case isl_dim_in: return dim->n_in;
172 case isl_dim_out: return dim->n_out;
173 case isl_dim_all: return dim->nparam + dim->n_in + dim->n_out;
174 default: return 0;
175 }
176 }
177
178 unsigned isl_space_dim(__isl_keep isl_space *dim, enum isl_dim_type type)
179 {
180 if (!dim)
181 return 0;
182 return n(dim, type);
183 }
184
185 unsigned isl_space_offset(__isl_keep isl_space *dim, enum isl_dim_type type)
186 {
187 if (!dim)
188 return 0;
189 return offset(dim, type);
190 }
191
192 static __isl_give isl_space *copy_ids(__isl_take isl_space *dst,
193 enum isl_dim_type dst_type, unsigned offset, __isl_keep isl_space *src,
194 enum isl_dim_type src_type)
195 {
196 int i;
197 isl_id *id;
198
199 if (!dst)
200 return NULL;
201
202 for (i = 0; i < n(src, src_type); ++i) {
203 id = get_id(src, src_type, i);
204 if (!id)
205 continue;
206 dst = set_id(dst, dst_type, offset + i, isl_id_copy(id));
207 if (!dst)
208 return NULL;
209 }
210 return dst;
211 }
212
213 __isl_take isl_space *isl_space_dup(__isl_keep isl_space *dim)
214 {
215 isl_space *dup;
216 if (!dim)
217 return NULL;
218 dup = isl_space_alloc(dim->ctx, dim->nparam, dim->n_in, dim->n_out);
219 if (dim->tuple_id[0] &&
220 !(dup->tuple_id[0] = isl_id_copy(dim->tuple_id[0])))
221 goto error;
222 if (dim->tuple_id[1] &&
223 !(dup->tuple_id[1] = isl_id_copy(dim->tuple_id[1])))
224 goto error;
225 if (dim->nested[0] && !(dup->nested[0] = isl_space_copy(dim->nested[0])))
226 goto error;
227 if (dim->nested[1] && !(dup->nested[1] = isl_space_copy(dim->nested[1])))
228 goto error;
229 if (!dim->ids)
230 return dup;
231 dup = copy_ids(dup, isl_dim_param, 0, dim, isl_dim_param);
232 dup = copy_ids(dup, isl_dim_in, 0, dim, isl_dim_in);
233 dup = copy_ids(dup, isl_dim_out, 0, dim, isl_dim_out);
234 return dup;
235 error:
236 isl_space_free(dup);
237 return NULL;
238 }
239
240 __isl_give isl_space *isl_space_cow(__isl_take isl_space *dim)
241 {
242 if (!dim)
243 return NULL;
244
245 if (dim->ref == 1)
246 return dim;
247 dim->ref--;
248 return isl_space_dup(dim);
249 }
250
251 __isl_give isl_space *isl_space_copy(__isl_keep isl_space *dim)
252 {
253 if (!dim)
254 return NULL;
255
256 dim->ref++;
257 return dim;
258 }
259
260 void isl_space_free(__isl_take isl_space *dim)
261 {
262 int i;
263
264 if (!dim)
265 return;
266
267 if (--dim->ref > 0)
268 return;
269
270 isl_id_free(dim->tuple_id[0]);
271 isl_id_free(dim->tuple_id[1]);
272
273 isl_space_free(dim->nested[0]);
274 isl_space_free(dim->nested[1]);
275
276 for (i = 0; i < dim->n_id; ++i)
277 isl_id_free(dim->ids[i]);
278 free(dim->ids);
279 isl_ctx_deref(dim->ctx);
280
281 free(dim);
282 }
283
284 static int name_ok(isl_ctx *ctx, const char *s)
285 {
286 char *p;
287 long dummy;
288
289 dummy = strtol(s, &p, 0);
290 if (p != s)
291 isl_die(ctx, isl_error_invalid, "name looks like a number",
292 return 0);
293
294 return 1;
295 }
296
297 int isl_space_has_tuple_id(__isl_keep isl_space *dim, enum isl_dim_type type)
298 {
299 if (!dim)
300 return -1;
301 if (type != isl_dim_in && type != isl_dim_out)
302 isl_die(dim->ctx, isl_error_invalid,
303 "only input, output and set tuples can have ids",
304 return -1);
305 return dim->tuple_id[type - isl_dim_in] != NULL;
306 }
307
308 __isl_give isl_id *isl_space_get_tuple_id(__isl_keep isl_space *dim,
309 enum isl_dim_type type)
310 {
311 if (!dim)
312 return NULL;
313 if (type != isl_dim_in && type != isl_dim_out)
314 isl_die(dim->ctx, isl_error_invalid,
315 "only input, output and set tuples can have ids",
316 return NULL);
317 if (!dim->tuple_id[type - isl_dim_in])
318 isl_die(dim->ctx, isl_error_invalid,
319 "tuple has no id", return NULL);
320 return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
321 }
322
323 __isl_give isl_space *isl_space_set_tuple_id(__isl_take isl_space *dim,
324 enum isl_dim_type type, __isl_take isl_id *id)
325 {
326 dim = isl_space_cow(dim);
327 if (!dim || !id)
328 goto error;
329 if (type != isl_dim_in && type != isl_dim_out)
330 isl_die(dim->ctx, isl_error_invalid,
331 "only input, output and set tuples can have names",
332 goto error);
333
334 isl_id_free(dim->tuple_id[type - isl_dim_in]);
335 dim->tuple_id[type - isl_dim_in] = id;
336
337 return dim;
338 error:
339 isl_id_free(id);
340 isl_space_free(dim);
341 return NULL;
342 }
343
344 __isl_give isl_space *isl_space_reset_tuple_id(__isl_take isl_space *dim,
345 enum isl_dim_type type)
346 {
347 dim = isl_space_cow(dim);
348 if (!dim)
349 return NULL;
350 if (type != isl_dim_in && type != isl_dim_out)
351 isl_die(dim->ctx, isl_error_invalid,
352 "only input, output and set tuples can have names",
353 goto error);
354
355 isl_id_free(dim->tuple_id[type - isl_dim_in]);
356 dim->tuple_id[type - isl_dim_in] = NULL;
357
358 return dim;
359 error:
360 isl_space_free(dim);
361 return NULL;
362 }
363
364 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *dim,
365 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
366 {
367 dim = isl_space_cow(dim);
368 if (!dim || !id)
369 goto error;
370 isl_id_free(get_id(dim, type, pos));
371 return set_id(dim, type, pos, id);
372 error:
373 isl_id_free(id);
374 isl_space_free(dim);
375 return NULL;
376 }
377
378 int isl_space_has_dim_id(__isl_keep isl_space *dim,
379 enum isl_dim_type type, unsigned pos)
380 {
381 if (!dim)
382 return -1;
383 return get_id(dim, type, pos) != NULL;
384 }
385
386 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
387 enum isl_dim_type type, unsigned pos)
388 {
389 if (!dim)
390 return NULL;
391 if (!get_id(dim, type, pos))
392 isl_die(dim->ctx, isl_error_invalid,
393 "dim has no id", return NULL);
394 return isl_id_copy(get_id(dim, type, pos));
395 }
396
397 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
398 enum isl_dim_type type, const char *s)
399 {
400 isl_id *id;
401
402 if (!dim)
403 return NULL;
404
405 if (!s)
406 return isl_space_reset_tuple_id(dim, type);
407
408 if (!name_ok(dim->ctx, s))
409 goto error;
410
411 id = isl_id_alloc(dim->ctx, s, NULL);
412 return isl_space_set_tuple_id(dim, type, id);
413 error:
414 isl_space_free(dim);
415 return NULL;
416 }
417
418 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
419 enum isl_dim_type type)
420 {
421 isl_id *id;
422 if (!dim)
423 return NULL;
424 if (type != isl_dim_in && type != isl_dim_out)
425 return NULL;
426 id = dim->tuple_id[type - isl_dim_in];
427 return id ? id->name : NULL;
428 }
429
430 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
431 enum isl_dim_type type, unsigned pos,
432 const char *s)
433 {
434 isl_id *id;
435
436 if (!dim)
437 return NULL;
438 if (!name_ok(dim->ctx, s))
439 goto error;
440 id = isl_id_alloc(dim->ctx, s, NULL);
441 return isl_space_set_dim_id(dim, type, pos, id);
442 error:
443 isl_space_free(dim);
444 return NULL;
445 }
446
447 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
448 enum isl_dim_type type, unsigned pos)
449 {
450 isl_id *id = get_id(dim, type, pos);
451 return id ? id->name : NULL;
452 }
453
454 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
455 __isl_keep isl_id *id)
456 {
457 int i;
458 int offset;
459 int n;
460
461 if (!dim || !id)
462 return -1;
463
464 offset = isl_space_offset(dim, type);
465 n = isl_space_dim(dim, type);
466 for (i = 0; i < n && offset + i < dim->n_id; ++i)
467 if (dim->ids[offset + i] == id)
468 return i;
469
470 return -1;
471 }
472
473 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
474 enum isl_dim_type type)
475 {
476 if (!dim)
477 return NULL;
478 if (type == isl_dim_in)
479 return dim->tuple_id[0];
480 if (type == isl_dim_out)
481 return dim->tuple_id[1];
482 return NULL;
483 }
484
485 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
486 enum isl_dim_type type)
487 {
488 if (!dim)
489 return NULL;
490 if (type == isl_dim_in)
491 return dim->nested[0];
492 if (type == isl_dim_out)
493 return dim->nested[1];
494 return NULL;
495 }
496
497 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
498 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
499 {
500 isl_id *id1, *id2;
501 isl_space *nested1, *nested2;
502
503 if (!dim1 || !dim2)
504 return -1;
505
506 if (dim1 == dim2 && dim1_type == dim2_type)
507 return 1;
508
509 if (n(dim1, dim1_type) != n(dim2, dim2_type))
510 return 0;
511 id1 = tuple_id(dim1, dim1_type);
512 id2 = tuple_id(dim2, dim2_type);
513 if (!id1 ^ !id2)
514 return 0;
515 if (id1 && id1 != id2)
516 return 0;
517 nested1 = nested(dim1, dim1_type);
518 nested2 = nested(dim2, dim2_type);
519 if (!nested1 ^ !nested2)
520 return 0;
521 if (nested1 && !isl_space_is_equal(nested1, nested2))
522 return 0;
523 return 1;
524 }
525
526 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
527 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
528 {
529 int i;
530
531 if (dim1 == dim2 && dim1_type == dim2_type)
532 return 1;
533
534 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
535 return 0;
536
537 if (!dim1->ids && !dim2->ids)
538 return 1;
539
540 for (i = 0; i < n(dim1, dim1_type); ++i) {
541 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
542 return 0;
543 }
544 return 1;
545 }
546
547 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
548 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
549 {
550 if (!dim1 || !dim2)
551 return -1;
552
553 return match(dim1, dim1_type, dim2, dim2_type);
554 }
555
556 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
557 unsigned first, unsigned n, __isl_keep isl_id **ids)
558 {
559 int i;
560
561 for (i = 0; i < n ; ++i)
562 ids[i] = get_id(dim, type, first + i);
563 }
564
565 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
566 unsigned nparam, unsigned n_in, unsigned n_out)
567 {
568 isl_id **ids = NULL;
569
570 if (!dim)
571 return NULL;
572 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
573 return dim;
574
575 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
576 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
577 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
578
579 dim = isl_space_cow(dim);
580
581 if (dim->ids) {
582 ids = isl_calloc_array(dim->ctx, isl_id *,
583 nparam + n_in + n_out);
584 if (!ids)
585 goto error;
586 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
587 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
588 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
589 free(dim->ids);
590 dim->ids = ids;
591 dim->n_id = nparam + n_in + n_out;
592 }
593 dim->nparam = nparam;
594 dim->n_in = n_in;
595 dim->n_out = n_out;
596
597 return dim;
598 error:
599 free(ids);
600 isl_space_free(dim);
601 return NULL;
602 }
603
604 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
605 enum isl_dim_type type, unsigned n)
606 {
607 if (!dim)
608 return NULL;
609 dim = isl_space_reset(dim, type);
610 switch (type) {
611 case isl_dim_param:
612 dim = isl_space_extend(dim,
613 dim->nparam + n, dim->n_in, dim->n_out);
614 if (dim && dim->nested[0] &&
615 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
616 isl_dim_param, n)))
617 goto error;
618 if (dim && dim->nested[1] &&
619 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
620 isl_dim_param, n)))
621 goto error;
622 return dim;
623 case isl_dim_in:
624 return isl_space_extend(dim,
625 dim->nparam, dim->n_in + n, dim->n_out);
626 case isl_dim_out:
627 return isl_space_extend(dim,
628 dim->nparam, dim->n_in, dim->n_out + n);
629 default:
630 isl_die(dim->ctx, isl_error_invalid,
631 "cannot add dimensions of specified type", goto error);
632 }
633 error:
634 isl_space_free(dim);
635 return NULL;
636 }
637
638 static int valid_dim_type(enum isl_dim_type type)
639 {
640 switch (type) {
641 case isl_dim_param:
642 case isl_dim_in:
643 case isl_dim_out:
644 return 1;
645 default:
646 return 0;
647 }
648 }
649
650 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
651 enum isl_dim_type type, unsigned pos, unsigned n)
652 {
653 isl_id **ids = NULL;
654
655 if (!dim)
656 return NULL;
657 if (n == 0)
658 return isl_space_reset(dim, type);
659
660 if (!valid_dim_type(type))
661 isl_die(dim->ctx, isl_error_invalid,
662 "cannot insert dimensions of specified type",
663 goto error);
664
665 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
666
667 dim = isl_space_cow(dim);
668 if (!dim)
669 return NULL;
670
671 if (dim->ids) {
672 enum isl_dim_type t;
673 int off;
674 int s[3];
675 int *size = s - isl_dim_param;
676 ids = isl_calloc_array(dim->ctx, isl_id *,
677 dim->nparam + dim->n_in + dim->n_out + n);
678 if (!ids)
679 goto error;
680 off = 0;
681 size[isl_dim_param] = dim->nparam;
682 size[isl_dim_in] = dim->n_in;
683 size[isl_dim_out] = dim->n_out;
684 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
685 if (t != type) {
686 get_ids(dim, t, 0, size[t], ids + off);
687 off += size[t];
688 } else {
689 get_ids(dim, t, 0, pos, ids + off);
690 off += pos + n;
691 get_ids(dim, t, pos, size[t] - pos, ids + off);
692 off += size[t] - pos;
693 }
694 }
695 free(dim->ids);
696 dim->ids = ids;
697 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
698 }
699 switch (type) {
700 case isl_dim_param: dim->nparam += n; break;
701 case isl_dim_in: dim->n_in += n; break;
702 case isl_dim_out: dim->n_out += n; break;
703 default: ;
704 }
705 dim = isl_space_reset(dim, type);
706
707 return dim;
708 error:
709 isl_space_free(dim);
710 return NULL;
711 }
712
713 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
714 enum isl_dim_type dst_type, unsigned dst_pos,
715 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
716 {
717 int i;
718
719 if (!dim)
720 return NULL;
721 if (n == 0)
722 return dim;
723
724 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
725 goto error);
726
727 if (dst_type == src_type && dst_pos == src_pos)
728 return dim;
729
730 isl_assert(dim->ctx, dst_type != src_type, goto error);
731
732 dim = isl_space_reset(dim, src_type);
733 dim = isl_space_reset(dim, dst_type);
734
735 dim = isl_space_cow(dim);
736 if (!dim)
737 return NULL;
738
739 if (dim->ids) {
740 isl_id **ids;
741 enum isl_dim_type t;
742 int off;
743 int s[3];
744 int *size = s - isl_dim_param;
745 ids = isl_calloc_array(dim->ctx, isl_id *,
746 dim->nparam + dim->n_in + dim->n_out);
747 if (!ids)
748 goto error;
749 off = 0;
750 size[isl_dim_param] = dim->nparam;
751 size[isl_dim_in] = dim->n_in;
752 size[isl_dim_out] = dim->n_out;
753 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
754 if (t == dst_type) {
755 get_ids(dim, t, 0, dst_pos, ids + off);
756 off += dst_pos;
757 get_ids(dim, src_type, src_pos, n, ids + off);
758 off += n;
759 get_ids(dim, t, dst_pos, size[t] - dst_pos,
760 ids + off);
761 off += size[t] - dst_pos;
762 } else if (t == src_type) {
763 get_ids(dim, t, 0, src_pos, ids + off);
764 off += src_pos;
765 get_ids(dim, t, src_pos + n,
766 size[t] - src_pos - n, ids + off);
767 off += size[t] - src_pos - n;
768 } else {
769 get_ids(dim, t, 0, size[t], ids + off);
770 off += size[t];
771 }
772 }
773 free(dim->ids);
774 dim->ids = ids;
775 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
776 }
777
778 switch (dst_type) {
779 case isl_dim_param: dim->nparam += n; break;
780 case isl_dim_in: dim->n_in += n; break;
781 case isl_dim_out: dim->n_out += n; break;
782 default: ;
783 }
784
785 switch (src_type) {
786 case isl_dim_param: dim->nparam -= n; break;
787 case isl_dim_in: dim->n_in -= n; break;
788 case isl_dim_out: dim->n_out -= n; break;
789 default: ;
790 }
791
792 if (dst_type != isl_dim_param && src_type != isl_dim_param)
793 return dim;
794
795 for (i = 0; i < 2; ++i) {
796 if (!dim->nested[i])
797 continue;
798 dim->nested[i] = isl_space_replace(dim->nested[i],
799 isl_dim_param, dim);
800 if (!dim->nested[i])
801 goto error;
802 }
803
804 return dim;
805 error:
806 isl_space_free(dim);
807 return NULL;
808 }
809
810 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
811 __isl_take isl_space *right)
812 {
813 isl_space *dim;
814
815 if (!left || !right)
816 goto error;
817
818 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
819 goto error);
820 isl_assert(left->ctx,
821 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
822 goto error);
823
824 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
825 if (!dim)
826 goto error;
827
828 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
829 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
830 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
831
832 if (dim && left->tuple_id[0] &&
833 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
834 goto error;
835 if (dim && right->tuple_id[1] &&
836 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
837 goto error;
838 if (dim && left->nested[0] &&
839 !(dim->nested[0] = isl_space_copy(left->nested[0])))
840 goto error;
841 if (dim && right->nested[1] &&
842 !(dim->nested[1] = isl_space_copy(right->nested[1])))
843 goto error;
844
845 isl_space_free(left);
846 isl_space_free(right);
847
848 return dim;
849 error:
850 isl_space_free(left);
851 isl_space_free(right);
852 return NULL;
853 }
854
855 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
856 __isl_take isl_space *right)
857 {
858 isl_space *dom1, *dom2, *nest1, *nest2;
859
860 if (!left || !right)
861 goto error;
862
863 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
864 goto error);
865
866 dom1 = isl_space_domain(isl_space_copy(left));
867 dom2 = isl_space_domain(isl_space_copy(right));
868 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
869
870 dom1 = isl_space_range(left);
871 dom2 = isl_space_range(right);
872 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
873
874 return isl_space_join(isl_space_reverse(nest1), nest2);
875 error:
876 isl_space_free(left);
877 isl_space_free(right);
878 return NULL;
879 }
880
881 /* Given two spaces { A -> C } and { B -> C }, construct the space
882 * { [A -> B] -> C }
883 */
884 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
885 __isl_take isl_space *right)
886 {
887 isl_space *ran, *dom1, *dom2, *nest;
888
889 if (!left || !right)
890 goto error;
891
892 if (!match(left, isl_dim_param, right, isl_dim_param))
893 isl_die(left->ctx, isl_error_invalid,
894 "parameters need to match", goto error);
895 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
896 isl_die(left->ctx, isl_error_invalid,
897 "ranges need to match", goto error);
898
899 ran = isl_space_range(isl_space_copy(left));
900
901 dom1 = isl_space_domain(left);
902 dom2 = isl_space_domain(right);
903 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
904
905 return isl_space_join(isl_space_reverse(nest), ran);
906 error:
907 isl_space_free(left);
908 isl_space_free(right);
909 return NULL;
910 }
911
912 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
913 __isl_take isl_space *right)
914 {
915 isl_space *dom, *ran1, *ran2, *nest;
916
917 if (!left || !right)
918 goto error;
919
920 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
921 goto error);
922 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
923 isl_die(left->ctx, isl_error_invalid,
924 "domains need to match", goto error);
925
926 dom = isl_space_domain(isl_space_copy(left));
927
928 ran1 = isl_space_range(left);
929 ran2 = isl_space_range(right);
930 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
931
932 return isl_space_join(isl_space_reverse(dom), nest);
933 error:
934 isl_space_free(left);
935 isl_space_free(right);
936 return NULL;
937 }
938
939 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
940 {
941 isl_id **ids = NULL;
942
943 if (!dim)
944 return NULL;
945 isl_assert(dim->ctx, dim->n_in == 0, goto error);
946 if (dim->n_out == 0 && !isl_space_is_named_or_nested(dim, isl_dim_out))
947 return dim;
948 dim = isl_space_cow(dim);
949 if (!dim)
950 return NULL;
951 if (dim->ids) {
952 ids = isl_calloc_array(dim->ctx, isl_id *,
953 dim->nparam + dim->n_out + dim->n_out);
954 if (!ids)
955 goto error;
956 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
957 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
958 }
959 dim->n_in = dim->n_out;
960 if (ids) {
961 free(dim->ids);
962 dim->ids = ids;
963 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
964 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
965 }
966 isl_id_free(dim->tuple_id[0]);
967 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
968 isl_space_free(dim->nested[0]);
969 dim->nested[0] = isl_space_copy(dim->nested[1]);
970 return dim;
971 error:
972 isl_space_free(dim);
973 return NULL;
974 }
975
976 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
977 enum isl_dim_type type,
978 unsigned first, unsigned n, __isl_take isl_id **ids)
979 {
980 int i;
981
982 for (i = 0; i < n ; ++i)
983 dim = set_id(dim, type, first + i, ids[i]);
984
985 return dim;
986 }
987
988 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
989 {
990 unsigned t;
991 isl_space *nested;
992 isl_id **ids = NULL;
993 isl_id *id;
994
995 if (!dim)
996 return NULL;
997 if (match(dim, isl_dim_in, dim, isl_dim_out))
998 return dim;
999
1000 dim = isl_space_cow(dim);
1001 if (!dim)
1002 return NULL;
1003
1004 id = dim->tuple_id[0];
1005 dim->tuple_id[0] = dim->tuple_id[1];
1006 dim->tuple_id[1] = id;
1007
1008 nested = dim->nested[0];
1009 dim->nested[0] = dim->nested[1];
1010 dim->nested[1] = nested;
1011
1012 if (dim->ids) {
1013 ids = isl_alloc_array(dim->ctx, isl_id *,
1014 dim->n_in + dim->n_out);
1015 if (!ids)
1016 goto error;
1017 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1018 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1019 }
1020
1021 t = dim->n_in;
1022 dim->n_in = dim->n_out;
1023 dim->n_out = t;
1024
1025 if (dim->ids) {
1026 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1027 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1028 free(ids);
1029 }
1030
1031 return dim;
1032 error:
1033 free(ids);
1034 isl_space_free(dim);
1035 return NULL;
1036 }
1037
1038 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1039 enum isl_dim_type type, unsigned first, unsigned num)
1040 {
1041 int i;
1042
1043 if (!dim)
1044 return NULL;
1045
1046 if (num == 0)
1047 return isl_space_reset(dim, type);
1048
1049 if (!valid_dim_type(type))
1050 isl_die(dim->ctx, isl_error_invalid,
1051 "cannot drop dimensions of specified type", goto error);
1052
1053 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1054 dim = isl_space_cow(dim);
1055 if (!dim)
1056 goto error;
1057 if (dim->ids) {
1058 dim = extend_ids(dim);
1059 if (!dim)
1060 goto error;
1061 for (i = 0; i < num; ++i)
1062 isl_id_free(get_id(dim, type, first + i));
1063 for (i = first+num; i < n(dim, type); ++i)
1064 set_id(dim, type, i - num, get_id(dim, type, i));
1065 switch (type) {
1066 case isl_dim_param:
1067 get_ids(dim, isl_dim_in, 0, dim->n_in,
1068 dim->ids + offset(dim, isl_dim_in) - num);
1069 case isl_dim_in:
1070 get_ids(dim, isl_dim_out, 0, dim->n_out,
1071 dim->ids + offset(dim, isl_dim_out) - num);
1072 default:
1073 ;
1074 }
1075 dim->n_id -= num;
1076 }
1077 switch (type) {
1078 case isl_dim_param: dim->nparam -= num; break;
1079 case isl_dim_in: dim->n_in -= num; break;
1080 case isl_dim_out: dim->n_out -= num; break;
1081 default: ;
1082 }
1083 dim = isl_space_reset(dim, type);
1084 if (type == isl_dim_param) {
1085 if (dim && dim->nested[0] &&
1086 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1087 isl_dim_param, first, num)))
1088 goto error;
1089 if (dim && dim->nested[1] &&
1090 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1091 isl_dim_param, first, num)))
1092 goto error;
1093 }
1094 return dim;
1095 error:
1096 isl_space_free(dim);
1097 return NULL;
1098 }
1099
1100 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1101 unsigned first, unsigned n)
1102 {
1103 if (!dim)
1104 return NULL;
1105 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1106 }
1107
1108 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1109 unsigned first, unsigned n)
1110 {
1111 if (!dim)
1112 return NULL;
1113 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1114 }
1115
1116 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1117 {
1118 if (!dim)
1119 return NULL;
1120 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1121 return isl_space_reverse(dim);
1122 }
1123
1124 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1125 {
1126 return isl_space_reverse(dim);
1127 }
1128
1129 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1130 {
1131 if (!dim)
1132 return NULL;
1133 return isl_space_drop_inputs(dim, 0, dim->n_in);
1134 }
1135
1136 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1137 {
1138 return dim;
1139 }
1140
1141 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1142 {
1143 space = isl_space_drop_dims(space,
1144 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1145 space = isl_space_drop_dims(space,
1146 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1147 return space;
1148 }
1149
1150 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1151 {
1152 dim = isl_space_cow(dim);
1153 if (!dim)
1154 return NULL;
1155
1156 dim->n_out += dim->n_in;
1157 dim->n_in = 0;
1158 dim = isl_space_reset(dim, isl_dim_in);
1159 dim = isl_space_reset(dim, isl_dim_out);
1160
1161 return dim;
1162 }
1163
1164 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1165 unsigned n_div)
1166 {
1167 int i;
1168
1169 if (!dim)
1170 return NULL;
1171 if (n_div == 0 &&
1172 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1173 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1174 dim = isl_space_cow(dim);
1175 if (!dim)
1176 return NULL;
1177 dim->n_out += dim->nparam + dim->n_in + n_div;
1178 dim->nparam = 0;
1179 dim->n_in = 0;
1180
1181 for (i = 0; i < dim->n_id; ++i)
1182 isl_id_free(get_id(dim, isl_dim_out, i));
1183 dim->n_id = 0;
1184 dim = isl_space_reset(dim, isl_dim_in);
1185 dim = isl_space_reset(dim, isl_dim_out);
1186
1187 return dim;
1188 }
1189
1190 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1191 {
1192 if (!dim1 || !dim2)
1193 return -1;
1194 if (dim1 == dim2)
1195 return 1;
1196 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1197 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1198 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1199 }
1200
1201 int isl_space_compatible(__isl_keep isl_space *dim1,
1202 __isl_keep isl_space *dim2)
1203 {
1204 return dim1->nparam == dim2->nparam &&
1205 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1206 }
1207
1208 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1209 {
1210 int i;
1211 isl_id *id;
1212
1213 if (!dim)
1214 return hash;
1215
1216 hash = isl_hash_builtin(hash, dim->nparam);
1217 hash = isl_hash_builtin(hash, dim->n_in);
1218 hash = isl_hash_builtin(hash, dim->n_out);
1219
1220 for (i = 0; i < dim->nparam; ++i) {
1221 id = get_id(dim, isl_dim_param, i);
1222 hash = isl_hash_id(hash, id);
1223 }
1224
1225 id = tuple_id(dim, isl_dim_in);
1226 hash = isl_hash_id(hash, id);
1227 id = tuple_id(dim, isl_dim_out);
1228 hash = isl_hash_id(hash, id);
1229
1230 hash = isl_hash_dim(hash, dim->nested[0]);
1231 hash = isl_hash_dim(hash, dim->nested[1]);
1232
1233 return hash;
1234 }
1235
1236 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1237 {
1238 uint32_t hash;
1239
1240 if (!dim)
1241 return 0;
1242
1243 hash = isl_hash_init();
1244 hash = isl_hash_dim(hash, dim);
1245
1246 return hash;
1247 }
1248
1249 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1250 {
1251 if (!dim)
1252 return -1;
1253
1254 if (dim->n_in != 0 || dim->tuple_id[0] || dim->nested[0])
1255 return 0;
1256
1257 return dim->nested[1] != NULL;
1258 }
1259
1260 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1261 {
1262 isl_space *wrap;
1263
1264 if (!dim)
1265 return NULL;
1266
1267 wrap = isl_space_alloc(dim->ctx, dim->nparam, 0, dim->n_in + dim->n_out);
1268
1269 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1270 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1271 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1272
1273 if (!wrap)
1274 goto error;
1275
1276 wrap->nested[1] = dim;
1277
1278 return wrap;
1279 error:
1280 isl_space_free(dim);
1281 return NULL;
1282 }
1283
1284 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1285 {
1286 isl_space *unwrap;
1287
1288 if (!dim)
1289 return NULL;
1290
1291 if (!isl_space_is_wrapping(dim))
1292 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1293 goto error);
1294
1295 unwrap = isl_space_copy(dim->nested[1]);
1296 isl_space_free(dim);
1297
1298 return unwrap;
1299 error:
1300 isl_space_free(dim);
1301 return NULL;
1302 }
1303
1304 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1305 {
1306 if (type != isl_dim_in && type != isl_dim_out)
1307 return 0;
1308 if (!dim)
1309 return -1;
1310 if (dim->tuple_id[type - isl_dim_in])
1311 return 1;
1312 if (dim->nested[type - isl_dim_in])
1313 return 1;
1314 return 0;
1315 }
1316
1317 int isl_space_may_be_set(__isl_keep isl_space *dim)
1318 {
1319 if (!dim)
1320 return -1;
1321 if (isl_space_dim(dim, isl_dim_in) != 0)
1322 return 0;
1323 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1324 return 0;
1325 return 1;
1326 }
1327
1328 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1329 enum isl_dim_type type)
1330 {
1331 if (!isl_space_is_named_or_nested(dim, type))
1332 return dim;
1333
1334 dim = isl_space_cow(dim);
1335 if (!dim)
1336 return NULL;
1337
1338 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1339 dim->tuple_id[type - isl_dim_in] = NULL;
1340 isl_space_free(dim->nested[type - isl_dim_in]);
1341 dim->nested[type - isl_dim_in] = NULL;
1342
1343 return dim;
1344 }
1345
1346 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1347 {
1348 if (!dim)
1349 return NULL;
1350 if (!dim->nested[0] && !dim->nested[1])
1351 return dim;
1352
1353 if (dim->nested[0])
1354 dim = isl_space_reset(dim, isl_dim_in);
1355 if (dim && dim->nested[1])
1356 dim = isl_space_reset(dim, isl_dim_out);
1357
1358 return dim;
1359 }
1360
1361 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1362 {
1363 if (!dim)
1364 return NULL;
1365 if (!dim->nested[0])
1366 return dim;
1367
1368 return isl_space_reset(dim, isl_dim_in);
1369 }
1370
1371 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1372 {
1373 if (!dim)
1374 return NULL;
1375 if (!dim->nested[1])
1376 return dim;
1377
1378 return isl_space_reset(dim, isl_dim_out);
1379 }
1380
1381 /* Replace the dimensions of the given type of dst by those of src.
1382 */
1383 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1384 enum isl_dim_type type, __isl_keep isl_space *src)
1385 {
1386 dst = isl_space_cow(dst);
1387
1388 if (!dst || !src)
1389 goto error;
1390
1391 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1392 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1393 dst = copy_ids(dst, type, 0, src, type);
1394
1395 if (dst && type == isl_dim_param) {
1396 int i;
1397 for (i = 0; i <= 1; ++i) {
1398 if (!dst->nested[i])
1399 continue;
1400 dst->nested[i] = isl_space_replace(dst->nested[i],
1401 type, src);
1402 if (!dst->nested[i])
1403 goto error;
1404 }
1405 }
1406
1407 return dst;
1408 error:
1409 isl_space_free(dst);
1410 return NULL;
1411 }
1412
1413 /* Given a dimension specification "dim" of a set, create a dimension
1414 * specification for the lift of the set. In particular, the result
1415 * is of the form [dim -> local[..]], with n_local variables in the
1416 * range of the wrapped map.
1417 */
1418 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1419 {
1420 isl_space *local_dim;
1421
1422 if (!dim)
1423 return NULL;
1424
1425 local_dim = isl_space_dup(dim);
1426 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1427 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1428 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1429 dim = isl_space_join(isl_space_from_domain(dim),
1430 isl_space_from_range(local_dim));
1431 dim = isl_space_wrap(dim);
1432 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1433
1434 return dim;
1435 }
1436
1437 int isl_space_can_zip(__isl_keep isl_space *dim)
1438 {
1439 if (!dim)
1440 return -1;
1441
1442 return dim->nested[0] && dim->nested[1];
1443 }
1444
1445 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1446 {
1447 isl_space *dom, *ran;
1448 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1449
1450 if (!isl_space_can_zip(dim))
1451 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1452 goto error);
1453
1454 if (!dim)
1455 return 0;
1456 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1457 ran = isl_space_unwrap(isl_space_range(dim));
1458 dom_dom = isl_space_domain(isl_space_copy(dom));
1459 dom_ran = isl_space_range(dom);
1460 ran_dom = isl_space_domain(isl_space_copy(ran));
1461 ran_ran = isl_space_range(ran);
1462 dom = isl_space_join(isl_space_from_domain(dom_dom),
1463 isl_space_from_range(ran_dom));
1464 ran = isl_space_join(isl_space_from_domain(dom_ran),
1465 isl_space_from_range(ran_ran));
1466 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1467 isl_space_from_range(isl_space_wrap(ran)));
1468 error:
1469 isl_space_free(dim);
1470 return NULL;
1471 }
1472
1473 int isl_space_has_named_params(__isl_keep isl_space *dim)
1474 {
1475 int i;
1476 unsigned off;
1477
1478 if (!dim)
1479 return -1;
1480 if (dim->nparam == 0)
1481 return 1;
1482 off = isl_space_offset(dim, isl_dim_param);
1483 if (off + dim->nparam > dim->n_id)
1484 return 0;
1485 for (i = 0; i < dim->nparam; ++i)
1486 if (!dim->ids[off + i])
1487 return 0;
1488 return 1;
1489 }
1490
1491 /* Align the initial parameters of dim1 to match the order in dim2.
1492 */
1493 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
1494 __isl_take isl_space *dim2)
1495 {
1496 isl_reordering *exp;
1497
1498 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
1499 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
1500 "parameter alignment requires named parameters",
1501 goto error);
1502
1503 dim2 = isl_space_params(dim2);
1504 exp = isl_parameter_alignment_reordering(dim1, dim2);
1505 exp = isl_reordering_extend_space(exp, dim1);
1506 isl_space_free(dim2);
1507 if (!exp)
1508 return NULL;
1509 dim1 = isl_space_copy(exp->dim);
1510 isl_reordering_free(exp);
1511 return dim1;
1512 error:
1513 isl_space_free(dim1);
1514 isl_space_free(dim2);
1515 return NULL;
1516 }
Integer set library