isl_union_map.c

   1 /*
   2  * Copyright 2010      INRIA Saclay
   3  *
   4  * Use of this software is governed by the GNU LGPLv2.1 license
   5  *
   6  * Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
   7  * Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
   8  * 91893 Orsay, France
   9  */
  10
  11 #include <isl_ctx.h>
  12 #include <isl_hash.h>
  13 #include <isl_map.h>
  14 #include <isl_set.h>
  15 #include <isl_dim_private.h>
  16 #include <isl_map_private.h>
  17 #include <isl_union_map_private.h>
  18 #include <isl_union_set.h>
  19
  20 static __isl_give isl_union_map *isl_union_map_alloc(__isl_take isl_dim *dim,
  21         int size)
  22 {
  23         isl_union_map *umap;
  24
  25         if (!dim)
  26                 return NULL;
  27
  28         umap = isl_calloc_type(dim->ctx, isl_union_map);
  29         if (!umap)
  30                 return NULL;
  31
  32         umap->ref = 1;
  33         umap->dim = dim;
  34         if (isl_hash_table_init(dim->ctx, &umap->table, size) < 0)
  35                 goto error;
  36
  37         return umap;
  38 error:
  39         isl_dim_free(dim);
  40         isl_union_map_free(umap);
  41         return NULL;
  42 }
  43
  44 __isl_give isl_union_map *isl_union_map_empty(__isl_take isl_dim *dim)
  45 {
  46         return isl_union_map_alloc(dim, 16);
  47 }
  48
  49 __isl_give isl_union_set *isl_union_set_empty(__isl_take isl_dim *dim)
  50 {
  51         return isl_union_map_empty(dim);
  52 }
  53
  54 isl_ctx *isl_union_map_get_ctx(__isl_keep isl_union_map *umap)
  55 {
  56         return umap ? umap->dim->ctx : NULL;
  57 }
  58
  59 isl_ctx *isl_union_set_get_ctx(__isl_keep isl_union_set *uset)
  60 {
  61         return uset ? uset->dim->ctx : NULL;
  62 }
  63
  64 __isl_give isl_dim *isl_union_map_get_dim(__isl_keep isl_union_map *umap)
  65 {
  66         if (!umap)
  67                 return NULL;
  68         return isl_dim_copy(umap->dim);
  69 }
  70
  71 __isl_give isl_dim *isl_union_set_get_dim(__isl_keep isl_union_set *uset)
  72 {
  73         return isl_union_map_get_dim(uset);
  74 }
  75
  76 static int free_umap_entry(void **entry, void *user)
  77 {
  78         isl_map *map = *entry;
  79         isl_map_free(map);
  80         return 0;
  81 }
  82
  83 static int add_map(__isl_take isl_map *map, void *user)
  84 {
  85         isl_union_map **umap = (isl_union_map **)user;
  86
  87         *umap = isl_union_map_add_map(*umap, map);
  88
  89         return 0;
  90 }
  91
  92 __isl_give isl_union_map *isl_union_map_dup(__isl_keep isl_union_map *umap)
  93 {
  94         isl_union_map *dup;
  95
  96         if (!umap)
  97                 return NULL;
  98
  99         dup = isl_union_map_empty(isl_dim_copy(umap->dim));
 100         if (isl_union_map_foreach_map(umap, &add_map, &dup) < 0)
 101                 goto error;
 102         return dup;
 103 error:
 104         isl_union_map_free(dup);
 105         return NULL;
 106 }
 107
 108 __isl_give isl_union_map *isl_union_map_cow(__isl_take isl_union_map *umap)
 109 {
 110         if (!umap)
 111                 return NULL;
 112
 113         if (umap->ref == 1)
 114                 return umap;
 115         umap->ref--;
 116         return isl_union_map_dup(umap);
 117 }
 118
 119 struct isl_union_align {
 120         isl_reordering *exp;
 121         isl_union_map *res;
 122 };
 123
 124 static int align_entry(void **entry, void *user)
 125 {
 126         isl_map *map = *entry;
 127         isl_reordering *exp;
 128         struct isl_union_align *data = user;
 129
 130         exp = isl_reordering_extend_dim(isl_reordering_copy(data->exp),
 131                                     isl_map_get_dim(map));
 132
 133         data->res = isl_union_map_add_map(data->res,
 134                                         isl_map_realign(isl_map_copy(map), exp));
 135
 136         return 0;
 137 }
 138
 139 /* Align the parameters of umap along those of model.
 140  * The result has the parameters of model first, in the same order
 141  * as they appear in model, followed by any remaining parameters of
 142  * umap that do not appear in model.
 143  */
 144 __isl_give isl_union_map *isl_union_map_align_params(
 145         __isl_take isl_union_map *umap, __isl_take isl_dim *model)
 146 {
 147         struct isl_union_align data = { NULL, NULL };
 148
 149         if (!umap || !model)
 150                 goto error;
 151
 152         if (isl_dim_match(umap->dim, isl_dim_param, model, isl_dim_param)) {
 153                 isl_dim_free(model);
 154                 return umap;
 155         }
 156
 157         data.exp = isl_parameter_alignment_reordering(umap->dim, model);
 158         if (!data.exp)
 159                 goto error;
 160
 161         data.res = isl_union_map_alloc(isl_dim_copy(data.exp->dim),
 162                                         umap->table.n);
 163         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 164                                         &align_entry, &data) < 0)
 165                 goto error;
 166
 167         isl_reordering_free(data.exp);
 168         isl_union_map_free(umap);
 169         isl_dim_free(model);
 170         return data.res;
 171 error:
 172         isl_reordering_free(data.exp);
 173         isl_union_map_free(umap);
 174         isl_union_map_free(data.res);
 175         isl_dim_free(model);
 176         return NULL;
 177 }
 178
 179 __isl_give isl_union_set *isl_union_set_align_params(
 180         __isl_take isl_union_set *uset, __isl_take isl_dim *model)
 181 {
 182         return isl_union_map_align_params(uset, model);
 183 }
 184
 185 __isl_give isl_union_map *isl_union_map_union(__isl_take isl_union_map *umap1,
 186         __isl_take isl_union_map *umap2)
 187 {
 188         umap1 = isl_union_map_align_params(umap1, isl_union_map_get_dim(umap2));
 189         umap2 = isl_union_map_align_params(umap2, isl_union_map_get_dim(umap1));
 190
 191         umap1 = isl_union_map_cow(umap1);
 192
 193         if (!umap1 || !umap2)
 194                 goto error;
 195
 196         if (isl_union_map_foreach_map(umap2, &add_map, &umap1) < 0)
 197                 goto error;
 198
 199         isl_union_map_free(umap2);
 200
 201         return umap1;
 202 error:
 203         isl_union_map_free(umap1);
 204         isl_union_map_free(umap2);
 205         return NULL;
 206 }
 207
 208 __isl_give isl_union_set *isl_union_set_union(__isl_take isl_union_set *uset1,
 209         __isl_take isl_union_set *uset2)
 210 {
 211         return isl_union_map_union(uset1, uset2);
 212 }
 213
 214 __isl_give isl_union_map *isl_union_map_copy(__isl_keep isl_union_map *umap)
 215 {
 216         if (!umap)
 217                 return NULL;
 218
 219         umap->ref++;
 220         return umap;
 221 }
 222
 223 __isl_give isl_union_set *isl_union_set_copy(__isl_keep isl_union_set *uset)
 224 {
 225         return isl_union_map_copy(uset);
 226 }
 227
 228 void isl_union_map_free(__isl_take isl_union_map *umap)
 229 {
 230         if (!umap)
 231                 return;
 232
 233         if (--umap->ref > 0)
 234                 return;
 235
 236         isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 237                                &free_umap_entry, NULL);
 238         isl_hash_table_clear(&umap->table);
 239         isl_dim_free(umap->dim);
 240         free(umap);
 241 }
 242
 243 void isl_union_set_free(__isl_take isl_union_set *uset)
 244 {
 245         isl_union_map_free(uset);
 246 }
 247
 248 static int has_dim(const void *entry, const void *val)
 249 {
 250         isl_map *map = (isl_map *)entry;
 251         isl_dim *dim = (isl_dim *)val;
 252
 253         return isl_dim_equal(map->dim, dim);
 254 }
 255
 256 __isl_give isl_union_map *isl_union_map_add_map(__isl_take isl_union_map *umap,
 257         __isl_take isl_map *map)
 258 {
 259         uint32_t hash;
 260         struct isl_hash_table_entry *entry;
 261
 262         if (isl_map_fast_is_empty(map)) {
 263                 isl_map_free(map);
 264                 return umap;
 265         }
 266
 267         umap = isl_union_map_cow(umap);
 268
 269         if (!map || !umap)
 270                 goto error;
 271
 272         isl_assert(map->ctx, isl_dim_match(map->dim, isl_dim_param, umap->dim,
 273                                            isl_dim_param), goto error);
 274
 275         hash = isl_dim_get_hash(map->dim);
 276         entry = isl_hash_table_find(umap->dim->ctx, &umap->table, hash,
 277                                     &has_dim, map->dim, 1);
 278         if (!entry)
 279                 goto error;
 280
 281         if (!entry->data)
 282                 entry->data = map;
 283         else {
 284                 entry->data = isl_map_union(entry->data, isl_map_copy(map));
 285                 if (!entry->data)
 286                         goto error;
 287                 isl_map_free(map);
 288         }
 289
 290         return umap;
 291 error:
 292         isl_map_free(map);
 293         isl_union_map_free(umap);
 294         return NULL;
 295 }
 296
 297 __isl_give isl_union_set *isl_union_set_add_set(__isl_take isl_union_set *uset,
 298         __isl_take isl_set *set)
 299 {
 300         return isl_union_map_add_map(uset, (isl_map *)set);
 301 }
 302
 303 __isl_give isl_union_map *isl_union_map_from_map(__isl_take isl_map *map)
 304 {
 305         isl_dim *dim;
 306         isl_union_map *umap;
 307
 308         if (!map)
 309                 return NULL;
 310
 311         dim = isl_map_get_dim(map);
 312         dim = isl_dim_drop(dim, isl_dim_in, 0, isl_dim_size(dim, isl_dim_in));
 313         dim = isl_dim_drop(dim, isl_dim_out, 0, isl_dim_size(dim, isl_dim_out));
 314         umap = isl_union_map_empty(dim);
 315         umap = isl_union_map_add_map(umap, map);
 316
 317         return umap;
 318 }
 319
 320 __isl_give isl_union_set *isl_union_set_from_set(__isl_take isl_set *set)
 321 {
 322         return isl_union_map_from_map((isl_map *)set);
 323 }
 324
 325 struct isl_union_map_foreach_data
 326 {
 327         int (*fn)(__isl_take isl_map *map, void *user);
 328         void *user;
 329 };
 330
 331 static int call_on_copy(void **entry, void *user)
 332 {
 333         isl_map *map = *entry;
 334         struct isl_union_map_foreach_data *data;
 335         data = (struct isl_union_map_foreach_data *)user;
 336
 337         return data->fn(isl_map_copy(map), data->user);
 338 }
 339
 340 int isl_union_map_foreach_map(__isl_keep isl_union_map *umap,
 341         int (*fn)(__isl_take isl_map *map, void *user), void *user)
 342 {
 343         struct isl_union_map_foreach_data data = { fn, user };
 344
 345         if (!umap)
 346                 return -1;
 347
 348         return isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 349                                       &call_on_copy, &data);
 350 }
 351
 352 int isl_union_set_foreach_set(__isl_keep isl_union_set *uset,
 353         int (*fn)(__isl_take isl_set *set, void *user), void *user)
 354 {
 355         return isl_union_map_foreach_map(uset,
 356                 (int(*)(__isl_take isl_map *, void*))fn, user);
 357 }
 358
 359 struct isl_union_set_foreach_point_data {
 360         int (*fn)(__isl_take isl_point *pnt, void *user);
 361         void *user;
 362 };
 363
 364 static int foreach_point(__isl_take isl_set *set, void *user)
 365 {
 366         struct isl_union_set_foreach_point_data *data = user;
 367         int r;
 368
 369         r = isl_set_foreach_point(set, data->fn, data->user);
 370         isl_set_free(set);
 371
 372         return r;
 373 }
 374
 375 int isl_union_set_foreach_point(__isl_keep isl_union_set *uset,
 376         int (*fn)(__isl_take isl_point *pnt, void *user), void *user)
 377 {
 378         struct isl_union_set_foreach_point_data data = { fn, user };
 379         return isl_union_set_foreach_set(uset, &foreach_point, &data);
 380 }
 381
 382 struct isl_union_map_gen_bin_data {
 383         isl_union_map *umap2;
 384         isl_union_map *res;
 385 };
 386
 387 static int subtract_entry(void **entry, void *user)
 388 {
 389         struct isl_union_map_gen_bin_data *data = user;
 390         uint32_t hash;
 391         struct isl_hash_table_entry *entry2;
 392         isl_map *map = *entry;
 393
 394         hash = isl_dim_get_hash(map->dim);
 395         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 396                                      hash, &has_dim, map->dim, 0);
 397         map = isl_map_copy(map);
 398         if (entry2) {
 399                 int empty;
 400                 map = isl_map_subtract(map, isl_map_copy(entry2->data));
 401
 402                 empty = isl_map_is_empty(map);
 403                 if (empty < 0) {
 404                         isl_map_free(map);
 405                         return -1;
 406                 }
 407                 if (empty) {
 408                         isl_map_free(map);
 409                         return 0;
 410                 }
 411         }
 412         data->res = isl_union_map_add_map(data->res, map);
 413
 414         return 0;
 415 }
 416
 417 static __isl_give isl_union_map *gen_bin_op(__isl_take isl_union_map *umap1,
 418         __isl_take isl_union_map *umap2, int (*fn)(void **, void *))
 419 {
 420         struct isl_union_map_gen_bin_data data = { NULL, NULL };
 421
 422         umap1 = isl_union_map_align_params(umap1, isl_union_map_get_dim(umap2));
 423         umap2 = isl_union_map_align_params(umap2, isl_union_map_get_dim(umap1));
 424
 425         if (!umap1 || !umap2)
 426                 goto error;
 427
 428         data.umap2 = umap2;
 429         data.res = isl_union_map_alloc(isl_dim_copy(umap1->dim),
 430                                        umap1->table.n);
 431         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
 432                                    fn, &data) < 0)
 433                 goto error;
 434
 435         isl_union_map_free(umap1);
 436         isl_union_map_free(umap2);
 437         return data.res;
 438 error:
 439         isl_union_map_free(umap1);
 440         isl_union_map_free(umap2);
 441         isl_union_map_free(data.res);
 442         return NULL;
 443 }
 444
 445 __isl_give isl_union_map *isl_union_map_subtract(
 446         __isl_take isl_union_map *umap1, __isl_take isl_union_map *umap2)
 447 {
 448         return gen_bin_op(umap1, umap2, &subtract_entry);
 449 }
 450
 451 __isl_give isl_union_set *isl_union_set_subtract(
 452         __isl_take isl_union_set *uset1, __isl_take isl_union_set *uset2)
 453 {
 454         return isl_union_map_subtract(uset1, uset2);
 455 }
 456
 457 struct isl_union_map_match_bin_data {
 458         isl_union_map *umap2;
 459         isl_union_map *res;
 460         __isl_give isl_map *(*fn)(__isl_take isl_map*, __isl_take isl_map*);
 461 };
 462
 463 static int match_bin_entry(void **entry, void *user)
 464 {
 465         struct isl_union_map_match_bin_data *data = user;
 466         uint32_t hash;
 467         struct isl_hash_table_entry *entry2;
 468         isl_map *map = *entry;
 469         int empty;
 470
 471         hash = isl_dim_get_hash(map->dim);
 472         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 473                                      hash, &has_dim, map->dim, 0);
 474         if (!entry2)
 475                 return 0;
 476
 477         map = isl_map_copy(map);
 478         map = data->fn(map, isl_map_copy(entry2->data));
 479
 480         empty = isl_map_is_empty(map);
 481         if (empty < 0) {
 482                 isl_map_free(map);
 483                 return -1;
 484         }
 485         if (empty) {
 486                 isl_map_free(map);
 487                 return 0;
 488         }
 489
 490         data->res = isl_union_map_add_map(data->res, map);
 491
 492         return 0;
 493 }
 494
 495 static __isl_give isl_union_map *match_bin_op(__isl_take isl_union_map *umap1,
 496         __isl_take isl_union_map *umap2,
 497         __isl_give isl_map *(*fn)(__isl_take isl_map*, __isl_take isl_map*))
 498 {
 499         struct isl_union_map_match_bin_data data = { NULL, NULL, fn };
 500
 501         umap1 = isl_union_map_align_params(umap1, isl_union_map_get_dim(umap2));
 502         umap2 = isl_union_map_align_params(umap2, isl_union_map_get_dim(umap1));
 503
 504         if (!umap1 || !umap2)
 505                 goto error;
 506
 507         data.umap2 = umap2;
 508         data.res = isl_union_map_alloc(isl_dim_copy(umap1->dim),
 509                                        umap1->table.n);
 510         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
 511                                    &match_bin_entry, &data) < 0)
 512                 goto error;
 513
 514         isl_union_map_free(umap1);
 515         isl_union_map_free(umap2);
 516         return data.res;
 517 error:
 518         isl_union_map_free(umap1);
 519         isl_union_map_free(umap2);
 520         isl_union_map_free(data.res);
 521         return NULL;
 522 }
 523
 524 __isl_give isl_union_map *isl_union_map_intersect(
 525         __isl_take isl_union_map *umap1, __isl_take isl_union_map *umap2)
 526 {
 527         return match_bin_op(umap1, umap2, &isl_map_intersect);
 528 }
 529
 530 __isl_give isl_union_set *isl_union_set_intersect(
 531         __isl_take isl_union_set *uset1, __isl_take isl_union_set *uset2)
 532 {
 533         return isl_union_map_intersect(uset1, uset2);
 534 }
 535
 536 __isl_give isl_union_map *isl_union_map_gist(__isl_take isl_union_map *umap,
 537         __isl_take isl_union_map *context)
 538 {
 539         return match_bin_op(umap, context, &isl_map_gist);
 540 }
 541
 542 __isl_give isl_union_set *isl_union_set_gist(__isl_take isl_union_set *uset,
 543         __isl_take isl_union_set *context)
 544 {
 545         return isl_union_map_gist(uset, context);
 546 }
 547
 548 static int intersect_domain_entry(void **entry, void *user)
 549 {
 550         struct isl_union_map_gen_bin_data *data = user;
 551         uint32_t hash;
 552         struct isl_hash_table_entry *entry2;
 553         isl_dim *dim;
 554         isl_map *map = *entry;
 555         int empty;
 556
 557         dim = isl_map_get_dim(map);
 558         dim = isl_dim_domain(dim);
 559         hash = isl_dim_get_hash(dim);
 560         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 561                                      hash, &has_dim, dim, 0);
 562         isl_dim_free(dim);
 563         if (!entry2)
 564                 return 0;
 565
 566         map = isl_map_copy(map);
 567         map = isl_map_intersect_domain(map, isl_set_copy(entry2->data));
 568
 569         empty = isl_map_is_empty(map);
 570         if (empty < 0) {
 571                 isl_map_free(map);
 572                 return -1;
 573         }
 574         if (empty) {
 575                 isl_map_free(map);
 576                 return 0;
 577         }
 578
 579         data->res = isl_union_map_add_map(data->res, map);
 580
 581         return 0;
 582 }
 583
 584 __isl_give isl_union_map *isl_union_map_intersect_domain(
 585         __isl_take isl_union_map *umap, __isl_take isl_union_set *uset)
 586 {
 587         return gen_bin_op(umap, uset, &intersect_domain_entry);
 588 }
 589
 590 struct isl_union_map_bin_data {
 591         isl_union_map *umap2;
 592         isl_union_map *res;
 593         isl_map *map;
 594         int (*fn)(void **entry, void *user);
 595 };
 596
 597 static int apply_range_entry(void **entry, void *user)
 598 {
 599         struct isl_union_map_bin_data *data = user;
 600         isl_map *map2 = *entry;
 601         int empty;
 602
 603         if (!isl_dim_tuple_match(data->map->dim, isl_dim_out,
 604                                  map2->dim, isl_dim_in))
 605                 return 0;
 606
 607         map2 = isl_map_apply_range(isl_map_copy(data->map), isl_map_copy(map2));
 608
 609         empty = isl_map_is_empty(map2);
 610         if (empty < 0) {
 611                 isl_map_free(map2);
 612                 return -1;
 613         }
 614         if (empty) {
 615                 isl_map_free(map2);
 616                 return 0;
 617         }
 618
 619         data->res = isl_union_map_add_map(data->res, map2);
 620
 621         return 0;
 622 }
 623
 624 static int bin_entry(void **entry, void *user)
 625 {
 626         struct isl_union_map_bin_data *data = user;
 627         isl_map *map = *entry;
 628
 629         data->map = map;
 630         if (isl_hash_table_foreach(data->umap2->dim->ctx, &data->umap2->table,
 631                                    data->fn, data) < 0)
 632                 return -1;
 633
 634         return 0;
 635 }
 636
 637 static __isl_give isl_union_map *bin_op(__isl_take isl_union_map *umap1,
 638         __isl_take isl_union_map *umap2, int (*fn)(void **entry, void *user))
 639 {
 640         struct isl_union_map_bin_data data = { NULL, NULL, NULL, fn };
 641
 642         umap1 = isl_union_map_align_params(umap1, isl_union_map_get_dim(umap2));
 643         umap2 = isl_union_map_align_params(umap2, isl_union_map_get_dim(umap1));
 644
 645         if (!umap1 || !umap2)
 646                 goto error;
 647
 648         data.umap2 = umap2;
 649         data.res = isl_union_map_alloc(isl_dim_copy(umap1->dim),
 650                                        umap1->table.n);
 651         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
 652                                    &bin_entry, &data) < 0)
 653                 goto error;
 654
 655         isl_union_map_free(umap1);
 656         isl_union_map_free(umap2);
 657         return data.res;
 658 error:
 659         isl_union_map_free(umap1);
 660         isl_union_map_free(umap2);
 661         isl_union_map_free(data.res);
 662         return NULL;
 663 }
 664
 665 __isl_give isl_union_map *isl_union_map_apply_range(
 666         __isl_take isl_union_map *umap1, __isl_take isl_union_map *umap2)
 667 {
 668         return bin_op(umap1, umap2, &apply_range_entry);
 669 }
 670
 671 __isl_give isl_union_set *isl_union_set_apply(
 672         __isl_take isl_union_set *uset, __isl_take isl_union_map *umap)
 673 {
 674         return isl_union_map_apply_range(uset, umap);
 675 }
 676
 677 static int product_entry(void **entry, void *user)
 678 {
 679         struct isl_union_map_bin_data *data = user;
 680         isl_map *map2 = *entry;
 681
 682         map2 = isl_map_product(isl_map_copy(data->map), isl_map_copy(map2));
 683
 684         data->res = isl_union_map_add_map(data->res, map2);
 685
 686         return 0;
 687 }
 688
 689 __isl_give isl_union_map *isl_union_map_product(__isl_take isl_union_map *umap1,
 690         __isl_take isl_union_map *umap2)
 691 {
 692         return bin_op(umap1, umap2, &product_entry);
 693 }
 694
 695 __isl_give isl_union_set *isl_union_set_product(__isl_take isl_union_set *uset1,
 696         __isl_take isl_union_set *uset2)
 697 {
 698         return isl_union_map_product(uset1, uset2);
 699 }
 700
 701 __isl_give isl_union_map *isl_union_map_from_range(
 702         __isl_take isl_union_set *uset)
 703 {
 704         return uset;
 705 }
 706
 707 __isl_give isl_union_map *isl_union_map_from_domain(
 708         __isl_take isl_union_set *uset)
 709 {
 710         return isl_union_map_reverse(isl_union_map_from_range(uset));
 711 }
 712
 713 __isl_give isl_union_map *isl_union_map_from_domain_and_range(
 714         __isl_take isl_union_set *domain, __isl_take isl_union_set *range)
 715 {
 716         return isl_union_map_apply_range(isl_union_map_from_domain(domain),
 717                                          isl_union_map_from_range(range));
 718 }
 719
 720 static __isl_give isl_union_map *un_op(__isl_take isl_union_map *umap,
 721         int (*fn)(void **, void *), int cow)
 722 {
 723         if (cow)
 724                 umap = isl_union_map_cow(umap);
 725         if (!umap)
 726                 return NULL;
 727
 728         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table, fn, NULL) < 0)
 729                 goto error;
 730
 731         return umap;
 732 error:
 733         isl_union_map_free(umap);
 734         return NULL;
 735 }
 736
 737 static int affine_entry(void **entry, void *user)
 738 {
 739         isl_map **map = (isl_map **)entry;
 740
 741         *map = isl_map_from_basic_map(isl_map_affine_hull(*map));
 742
 743         return *map ? 0 : -1;
 744 }
 745
 746 __isl_give isl_union_map *isl_union_map_affine_hull(
 747         __isl_take isl_union_map *umap)
 748 {
 749         return un_op(umap, &affine_entry, 1);
 750 }
 751
 752 __isl_give isl_union_set *isl_union_set_affine_hull(
 753         __isl_take isl_union_set *uset)
 754 {
 755         return isl_union_map_affine_hull(uset);
 756 }
 757
 758 static int coalesce_entry(void **entry, void *user)
 759 {
 760         isl_map **map = (isl_map **)entry;
 761
 762         *map = isl_map_coalesce(*map);
 763
 764         return *map ? 0 : -1;
 765 }
 766
 767 __isl_give isl_union_map *isl_union_map_coalesce(
 768         __isl_take isl_union_map *umap)
 769 {
 770         return un_op(umap, &coalesce_entry, 0);
 771 }
 772
 773 __isl_give isl_union_set *isl_union_set_coalesce(
 774         __isl_take isl_union_set *uset)
 775 {
 776         return isl_union_map_coalesce(uset);
 777 }
 778
 779 static int compute_divs_entry(void **entry, void *user)
 780 {
 781         isl_map **map = (isl_map **)entry;
 782
 783         *map = isl_map_compute_divs(*map);
 784
 785         return *map ? 0 : -1;
 786 }
 787
 788 __isl_give isl_union_map *isl_union_map_compute_divs(
 789         __isl_take isl_union_map *umap)
 790 {
 791         return un_op(umap, &compute_divs_entry, 0);
 792 }
 793
 794 __isl_give isl_union_set *isl_union_set_compute_divs(
 795         __isl_take isl_union_set *uset)
 796 {
 797         return isl_union_map_compute_divs(uset);
 798 }
 799
 800 static int lexmin_entry(void **entry, void *user)
 801 {
 802         isl_map **map = (isl_map **)entry;
 803
 804         *map = isl_map_lexmin(*map);
 805
 806         return *map ? 0 : -1;
 807 }
 808
 809 __isl_give isl_union_map *isl_union_map_lexmin(
 810         __isl_take isl_union_map *umap)
 811 {
 812         return un_op(umap, &lexmin_entry, 1);
 813 }
 814
 815 __isl_give isl_union_set *isl_union_set_lexmin(
 816         __isl_take isl_union_set *uset)
 817 {
 818         return isl_union_map_lexmin(uset);
 819 }
 820
 821 static int lexmax_entry(void **entry, void *user)
 822 {
 823         isl_map **map = (isl_map **)entry;
 824
 825         *map = isl_map_lexmax(*map);
 826
 827         return *map ? 0 : -1;
 828 }
 829
 830 __isl_give isl_union_map *isl_union_map_lexmax(
 831         __isl_take isl_union_map *umap)
 832 {
 833         return un_op(umap, &lexmax_entry, 1);
 834 }
 835
 836 __isl_give isl_union_set *isl_union_set_lexmax(
 837         __isl_take isl_union_set *uset)
 838 {
 839         return isl_union_map_lexmax(uset);
 840 }
 841
 842 static __isl_give isl_union_set *cond_un_op(__isl_take isl_union_map *umap,
 843         int (*fn)(void **, void *))
 844 {
 845         isl_union_set *res;
 846
 847         if (!umap)
 848                 return NULL;
 849
 850         res = isl_union_map_alloc(isl_dim_copy(umap->dim), umap->table.n);
 851         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table, fn, &res) < 0)
 852                 goto error;
 853
 854         isl_union_map_free(umap);
 855         return res;
 856 error:
 857         isl_union_map_free(umap);
 858         isl_union_set_free(res);
 859         return NULL;
 860 }
 861
 862 static int reverse_entry(void **entry, void *user)
 863 {
 864         isl_map *map = *entry;
 865         isl_union_map **res = user;
 866
 867         *res = isl_union_map_add_map(*res, isl_map_reverse(isl_map_copy(map)));
 868
 869         return 0;
 870 }
 871
 872 __isl_give isl_union_map *isl_union_map_reverse(__isl_take isl_union_map *umap)
 873 {
 874         return cond_un_op(umap, &reverse_entry);
 875 }
 876
 877 static int domain_entry(void **entry, void *user)
 878 {
 879         isl_map *map = *entry;
 880         isl_union_set **res = user;
 881
 882         *res = isl_union_set_add_set(*res, isl_map_domain(isl_map_copy(map)));
 883
 884         return 0;
 885 }
 886
 887 __isl_give isl_union_set *isl_union_map_domain(__isl_take isl_union_map *umap)
 888 {
 889         return cond_un_op(umap, &domain_entry);
 890 }
 891
 892 static int range_entry(void **entry, void *user)
 893 {
 894         isl_map *map = *entry;
 895         isl_union_set **res = user;
 896
 897         *res = isl_union_set_add_set(*res, isl_map_range(isl_map_copy(map)));
 898
 899         return 0;
 900 }
 901
 902 __isl_give isl_union_set *isl_union_map_range(__isl_take isl_union_map *umap)
 903 {
 904         return cond_un_op(umap, &range_entry);
 905 }
 906
 907 static int deltas_entry(void **entry, void *user)
 908 {
 909         isl_map *map = *entry;
 910         isl_union_set **res = user;
 911
 912         if (!isl_dim_tuple_match(map->dim, isl_dim_in, map->dim, isl_dim_out))
 913                 return 0;
 914
 915         *res = isl_union_set_add_set(*res, isl_map_deltas(isl_map_copy(map)));
 916
 917         return 0;
 918 }
 919
 920 __isl_give isl_union_set *isl_union_map_deltas(__isl_take isl_union_map *umap)
 921 {
 922         return cond_un_op(umap, &deltas_entry);
 923 }
 924
 925 static int unwrap_entry(void **entry, void *user)
 926 {
 927         isl_set *set = *entry;
 928         isl_union_set **res = user;
 929
 930         if (!isl_set_is_wrapping(set))
 931                 return 0;
 932
 933         *res = isl_union_map_add_map(*res, isl_set_unwrap(isl_set_copy(set)));
 934
 935         return 0;
 936 }
 937
 938 __isl_give isl_union_map *isl_union_set_unwrap(__isl_take isl_union_set *uset)
 939 {
 940         return cond_un_op(uset, &unwrap_entry);
 941 }
 942
 943 static int wrap_entry(void **entry, void *user)
 944 {
 945         isl_map *map = *entry;
 946         isl_union_set **res = user;
 947
 948         *res = isl_union_set_add_set(*res, isl_map_wrap(isl_map_copy(map)));
 949
 950         return 0;
 951 }
 952
 953 __isl_give isl_union_set *isl_union_map_wrap(__isl_take isl_union_map *umap)
 954 {
 955         return cond_un_op(umap, &wrap_entry);
 956 }
 957
 958 struct isl_union_map_is_subset_data {
 959         isl_union_map *umap2;
 960         int is_subset;
 961 };
 962
 963 static int is_subset_entry(void **entry, void *user)
 964 {
 965         struct isl_union_map_is_subset_data *data = user;
 966         uint32_t hash;
 967         struct isl_hash_table_entry *entry2;
 968         isl_map *map = *entry;
 969
 970         hash = isl_dim_get_hash(map->dim);
 971         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 972                                      hash, &has_dim, map->dim, 0);
 973         if (!entry2) {
 974                 data->is_subset = 0;
 975                 return -1;
 976         }
 977
 978         data->is_subset = isl_map_is_subset(map, entry2->data);
 979         if (data->is_subset < 0 || !data->is_subset)
 980                 return -1;
 981
 982         return 0;
 983 }
 984
 985 int isl_union_map_is_subset(__isl_keep isl_union_map *umap1,
 986         __isl_keep isl_union_map *umap2)
 987 {
 988         struct isl_union_map_is_subset_data data = { NULL, 1 };
 989
 990         umap1 = isl_union_map_copy(umap1);
 991         umap2 = isl_union_map_copy(umap2);
 992         umap1 = isl_union_map_align_params(umap1, isl_union_map_get_dim(umap2));
 993         umap2 = isl_union_map_align_params(umap2, isl_union_map_get_dim(umap1));
 994
 995         if (!umap1 || !umap2)
 996                 goto error;
 997
 998         data.umap2 = umap2;
 999         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
1000                                    &is_subset_entry, &data) < 0 &&
1001             data.is_subset)
1002                 goto error;
1003
1004         isl_union_map_free(umap1);
1005         isl_union_map_free(umap2);
1006
1007         return data.is_subset;
1008 error:
1009         isl_union_map_free(umap1);
1010         isl_union_map_free(umap2);
1011         return -1;
1012 }
1013
1014 int isl_union_map_is_equal(__isl_keep isl_union_map *umap1,
1015         __isl_keep isl_union_map *umap2)
1016 {
1017         int is_subset;
1018
1019         if (!umap1 || !umap2)
1020                 return -1;
1021         is_subset = isl_union_map_is_subset(umap1, umap2);
1022         if (is_subset != 1)
1023                 return is_subset;
1024         is_subset = isl_union_map_is_subset(umap2, umap1);
1025         return is_subset;
1026 }
1027
1028 int isl_union_map_is_strict_subset(__isl_keep isl_union_map *umap1,
1029         __isl_keep isl_union_map *umap2)
1030 {
1031         int is_subset;
1032
1033         if (!umap1 || !umap2)
1034                 return -1;
1035         is_subset = isl_union_map_is_subset(umap1, umap2);
1036         if (is_subset != 1)
1037                 return is_subset;
1038         is_subset = isl_union_map_is_subset(umap2, umap1);
1039         if (is_subset == -1)
1040                 return is_subset;
1041         return !is_subset;
1042 }
1043
1044 static int sample_entry(void **entry, void *user)
1045 {
1046         isl_basic_map **sample = (isl_basic_map **)user;
1047         isl_map *map = *entry;
1048
1049         *sample = isl_map_sample(isl_map_copy(map));
1050         if (!*sample)
1051                 return -1;
1052         if (!isl_basic_map_fast_is_empty(*sample))
1053                 return -1;
1054         return 0;
1055 }
1056
1057 __isl_give isl_basic_map *isl_union_map_sample(__isl_take isl_union_map *umap)
1058 {
1059         isl_basic_map *sample = NULL;
1060
1061         if (!umap)
1062                 return NULL;
1063
1064         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table,
1065                                    &sample_entry, &sample) < 0 &&
1066             !sample)
1067                 goto error;
1068
1069         isl_union_map_free(umap);
1070
1071         return sample;
1072 error:
1073         isl_union_map_free(umap);
1074         return NULL;
1075 }
1076
1077 __isl_give isl_basic_set *isl_union_set_sample(__isl_take isl_union_set *uset)
1078 {
1079         return (isl_basic_set *)isl_union_map_sample(uset);
1080 }
1081
1082 static int empty_entry(void **entry, void *user)
1083 {
1084         int *empty = user;
1085         isl_map *map = *entry;
1086
1087         if (isl_map_is_empty(map))
1088                 return 0;
1089
1090         *empty = 0;
1091
1092         return -1;
1093 }
1094
1095 __isl_give int isl_union_map_is_empty(__isl_keep isl_union_map *umap)
1096 {
1097         int empty = 1;
1098
1099         if (!umap)
1100                 return -1;
1101
1102         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table,
1103                                    &empty_entry, &empty) < 0 && empty)
1104                 return -1;
1105
1106         return empty;
1107 }
1108
1109 int isl_union_set_is_empty(__isl_keep isl_union_set *uset)
1110 {
1111         return isl_union_map_is_empty(uset);
1112 }