isl_dim.c

   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_dim_private.h>
  15 #include <isl_id_private.h>
  16 #include <isl_reordering.h>
  17
  18 isl_ctx *isl_dim_get_ctx(__isl_keep isl_dim *dim)
  19 {
  20         return dim ? dim->ctx : NULL;
  21 }
  22
  23 struct isl_dim *isl_dim_alloc(struct isl_ctx *ctx,
  24                         unsigned nparam, unsigned n_in, unsigned n_out)
  25 {
  26         struct isl_dim *dim;
  27
  28         dim = isl_alloc_type(ctx, struct isl_dim);
  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 struct isl_dim *isl_dim_set_alloc(struct isl_ctx *ctx,
  52                         unsigned nparam, unsigned dim)
  53 {
  54         return isl_dim_alloc(ctx, nparam, 0, dim);
  55 }
  56
  57 static unsigned global_pos(struct isl_dim *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, return isl_dim_total(dim));
  65                 return pos;
  66         case isl_dim_in:
  67                 isl_assert(ctx, pos < dim->n_in, return isl_dim_total(dim));
  68                 return pos + dim->nparam;
  69         case isl_dim_out:
  70                 isl_assert(ctx, pos < dim->n_out, return isl_dim_total(dim));
  71                 return pos + dim->nparam + dim->n_in;
  72         default:
  73                 isl_assert(ctx, 0, return isl_dim_total(dim));
  74         }
  75         return isl_dim_total(dim);
  76 }
  77
  78 /* Extend length of ids array to the total number of dimensions.
  79  */
  80 static __isl_give isl_dim *extend_ids(__isl_take isl_dim *dim)
  81 {
  82         isl_id **ids;
  83         int i;
  84
  85         if (isl_dim_total(dim) <= dim->n_id)
  86                 return dim;
  87
  88         if (!dim->ids) {
  89                 dim->ids = isl_calloc_array(dim->ctx,
  90                                 isl_id *, isl_dim_total(dim));
  91                 if (!dim->ids)
  92                         goto error;
  93         } else {
  94                 ids = isl_realloc_array(dim->ctx, dim->ids,
  95                                 isl_id *, isl_dim_total(dim));
  96                 if (!ids)
  97                         goto error;
  98                 dim->ids = ids;
  99                 for (i = dim->n_id; i < isl_dim_total(dim); ++i)
 100                         dim->ids[i] = NULL;
 101         }
 102
 103         dim->n_id = isl_dim_total(dim);
 104
 105         return dim;
 106 error:
 107         isl_dim_free(dim);
 108         return NULL;
 109 }
 110
 111 static __isl_give isl_dim *set_id(__isl_take isl_dim *dim,
 112         enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
 113 {
 114         dim = isl_dim_cow(dim);
 115
 116         if (!dim)
 117                 goto error;
 118
 119         pos = global_pos(dim, type, pos);
 120         if (pos == isl_dim_total(dim))
 121                 goto error;
 122
 123         if (pos >= dim->n_id) {
 124                 if (!id)
 125                         return dim;
 126                 dim = extend_ids(dim);
 127                 if (!dim)
 128                         goto error;
 129         }
 130
 131         dim->ids[pos] = id;
 132
 133         return dim;
 134 error:
 135         isl_id_free(id);
 136         isl_dim_free(dim);
 137         return NULL;
 138 }
 139
 140 static __isl_keep isl_id *get_id(__isl_keep isl_dim *dim,
 141                                  enum isl_dim_type type, unsigned pos)
 142 {
 143         if (!dim)
 144                 return NULL;
 145
 146         pos = global_pos(dim, type, pos);
 147         if (pos == isl_dim_total(dim))
 148                 return NULL;
 149         if (pos >= dim->n_id)
 150                 return NULL;
 151         return dim->ids[pos];
 152 }
 153
 154 static unsigned offset(struct isl_dim *dim, enum isl_dim_type type)
 155 {
 156         switch (type) {
 157         case isl_dim_param:     return 0;
 158         case isl_dim_in:        return dim->nparam;
 159         case isl_dim_out:       return dim->nparam + dim->n_in;
 160         default:                return 0;
 161         }
 162 }
 163
 164 static unsigned n(struct isl_dim *dim, enum isl_dim_type type)
 165 {
 166         switch (type) {
 167         case isl_dim_param:     return dim->nparam;
 168         case isl_dim_in:        return dim->n_in;
 169         case isl_dim_out:       return dim->n_out;
 170         case isl_dim_all:       return dim->nparam + dim->n_in + dim->n_out;
 171         default:                return 0;
 172         }
 173 }
 174
 175 unsigned isl_dim_size(struct isl_dim *dim, enum isl_dim_type type)
 176 {
 177         if (!dim)
 178                 return 0;
 179         return n(dim, type);
 180 }
 181
 182 unsigned isl_dim_offset(__isl_keep isl_dim *dim, enum isl_dim_type type)
 183 {
 184         if (!dim)
 185                 return 0;
 186         return offset(dim, type);
 187 }
 188
 189 static __isl_give isl_dim *copy_ids(__isl_take isl_dim *dst,
 190         enum isl_dim_type dst_type, unsigned offset, __isl_keep isl_dim *src,
 191         enum isl_dim_type src_type)
 192 {
 193         int i;
 194         isl_id *id;
 195
 196         if (!dst)
 197                 return NULL;
 198
 199         for (i = 0; i < n(src, src_type); ++i) {
 200                 id = get_id(src, src_type, i);
 201                 if (!id)
 202                         continue;
 203                 dst = set_id(dst, dst_type, offset + i, isl_id_copy(id));
 204                 if (!dst)
 205                         return NULL;
 206         }
 207         return dst;
 208 }
 209
 210 struct isl_dim *isl_dim_dup(struct isl_dim *dim)
 211 {
 212         struct isl_dim *dup;
 213         if (!dim)
 214                 return NULL;
 215         dup = isl_dim_alloc(dim->ctx, dim->nparam, dim->n_in, dim->n_out);
 216         if (dim->tuple_id[0] &&
 217             !(dup->tuple_id[0] = isl_id_copy(dim->tuple_id[0])))
 218                 goto error;
 219         if (dim->tuple_id[1] &&
 220             !(dup->tuple_id[1] = isl_id_copy(dim->tuple_id[1])))
 221                 goto error;
 222         if (dim->nested[0] && !(dup->nested[0] = isl_dim_copy(dim->nested[0])))
 223                 goto error;
 224         if (dim->nested[1] && !(dup->nested[1] = isl_dim_copy(dim->nested[1])))
 225                 goto error;
 226         if (!dim->ids)
 227                 return dup;
 228         dup = copy_ids(dup, isl_dim_param, 0, dim, isl_dim_param);
 229         dup = copy_ids(dup, isl_dim_in, 0, dim, isl_dim_in);
 230         dup = copy_ids(dup, isl_dim_out, 0, dim, isl_dim_out);
 231         return dup;
 232 error:
 233         isl_dim_free(dup);
 234         return NULL;
 235 }
 236
 237 struct isl_dim *isl_dim_cow(struct isl_dim *dim)
 238 {
 239         if (!dim)
 240                 return NULL;
 241
 242         if (dim->ref == 1)
 243                 return dim;
 244         dim->ref--;
 245         return isl_dim_dup(dim);
 246 }
 247
 248 struct isl_dim *isl_dim_copy(struct isl_dim *dim)
 249 {
 250         if (!dim)
 251                 return NULL;
 252
 253         dim->ref++;
 254         return dim;
 255 }
 256
 257 void isl_dim_free(struct isl_dim *dim)
 258 {
 259         int i;
 260
 261         if (!dim)
 262                 return;
 263
 264         if (--dim->ref > 0)
 265                 return;
 266
 267         isl_id_free(dim->tuple_id[0]);
 268         isl_id_free(dim->tuple_id[1]);
 269
 270         isl_dim_free(dim->nested[0]);
 271         isl_dim_free(dim->nested[1]);
 272
 273         for (i = 0; i < dim->n_id; ++i)
 274                 isl_id_free(dim->ids[i]);
 275         free(dim->ids);
 276         isl_ctx_deref(dim->ctx);
 277
 278         free(dim);
 279 }
 280
 281 static int name_ok(isl_ctx *ctx, const char *s)
 282 {
 283         char *p;
 284         long dummy;
 285
 286         dummy = strtol(s, &p, 0);
 287         if (p != s)
 288                 isl_die(ctx, isl_error_invalid, "name looks like a number",
 289                         return 0);
 290
 291         return 1;
 292 }
 293
 294 int isl_dim_has_tuple_id(__isl_keep isl_dim *dim, enum isl_dim_type type)
 295 {
 296         if (!dim)
 297                 return -1;
 298         if (type != isl_dim_in && type != isl_dim_out)
 299                 isl_die(dim->ctx, isl_error_invalid,
 300                         "only input, output and set tuples can have ids",
 301                         return -1);
 302         return dim->tuple_id[type - isl_dim_in] != NULL;
 303 }
 304
 305 __isl_give isl_id *isl_dim_get_tuple_id(__isl_keep isl_dim *dim,
 306         enum isl_dim_type type)
 307 {
 308         if (!dim)
 309                 return NULL;
 310         if (type != isl_dim_in && type != isl_dim_out)
 311                 return NULL;
 312         return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
 313 }
 314
 315 __isl_give isl_dim *isl_dim_set_tuple_id(__isl_take isl_dim *dim,
 316         enum isl_dim_type type, __isl_take isl_id *id)
 317 {
 318         dim = isl_dim_cow(dim);
 319         if (!dim || !id)
 320                 goto error;
 321         if (type != isl_dim_in && type != isl_dim_out)
 322                 isl_die(dim->ctx, isl_error_invalid,
 323                         "only input, output and set tuples can have names",
 324                         goto error);
 325
 326         isl_id_free(dim->tuple_id[type - isl_dim_in]);
 327         dim->tuple_id[type - isl_dim_in] = id;
 328
 329         return dim;
 330 error:
 331         isl_id_free(id);
 332         isl_dim_free(dim);
 333         return NULL;
 334 }
 335
 336 __isl_give isl_dim *isl_dim_reset_tuple_id(__isl_take isl_dim *dim,
 337         enum isl_dim_type type)
 338 {
 339         dim = isl_dim_cow(dim);
 340         if (!dim)
 341                 return NULL;
 342         if (type != isl_dim_in && type != isl_dim_out)
 343                 isl_die(dim->ctx, isl_error_invalid,
 344                         "only input, output and set tuples can have names",
 345                         goto error);
 346
 347         isl_id_free(dim->tuple_id[type - isl_dim_in]);
 348         dim->tuple_id[type - isl_dim_in] = NULL;
 349
 350         return dim;
 351 error:
 352         isl_dim_free(dim);
 353         return NULL;
 354 }
 355
 356 __isl_give isl_dim *isl_dim_set_dim_id(__isl_take isl_dim *dim,
 357         enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
 358 {
 359         dim = isl_dim_cow(dim);
 360         if (!dim || !id)
 361                 goto error;
 362         isl_id_free(get_id(dim, type, pos));
 363         return set_id(dim, type, pos, id);
 364 error:
 365         isl_id_free(id);
 366         isl_dim_free(dim);
 367         return NULL;
 368 }
 369
 370 int isl_dim_has_dim_id(__isl_keep isl_dim *dim,
 371         enum isl_dim_type type, unsigned pos)
 372 {
 373         if (!dim)
 374                 return -1;
 375         return get_id(dim, type, pos) != NULL;
 376 }
 377
 378 __isl_give isl_id *isl_dim_get_dim_id(__isl_keep isl_dim *dim,
 379         enum isl_dim_type type, unsigned pos)
 380 {
 381         return isl_id_copy(get_id(dim, type, pos));
 382 }
 383
 384 __isl_give isl_dim *isl_dim_set_tuple_name(__isl_take isl_dim *dim,
 385         enum isl_dim_type type, const char *s)
 386 {
 387         isl_id *id;
 388
 389         if (!dim)
 390                 return NULL;
 391
 392         if (!s)
 393                 return isl_dim_reset_tuple_id(dim, type);
 394
 395         if (!name_ok(dim->ctx, s))
 396                 goto error;
 397
 398         id = isl_id_alloc(dim->ctx, s, NULL);
 399         return isl_dim_set_tuple_id(dim, type, id);
 400 error:
 401         isl_dim_free(dim);
 402         return NULL;
 403 }
 404
 405 const char *isl_dim_get_tuple_name(__isl_keep isl_dim *dim,
 406          enum isl_dim_type type)
 407 {
 408         isl_id *id;
 409         if (!dim)
 410                 return NULL;
 411         if (type != isl_dim_in && type != isl_dim_out)
 412                 return NULL;
 413         id = dim->tuple_id[type - isl_dim_in];
 414         return id ? id->name : NULL;
 415 }
 416
 417 struct isl_dim *isl_dim_set_name(struct isl_dim *dim,
 418                                  enum isl_dim_type type, unsigned pos,
 419                                  const char *s)
 420 {
 421         isl_id *id;
 422
 423         if (!dim)
 424                 return NULL;
 425         if (!name_ok(dim->ctx, s))
 426                 goto error;
 427         id = isl_id_alloc(dim->ctx, s, NULL);
 428         return isl_dim_set_dim_id(dim, type, pos, id);
 429 error:
 430         isl_dim_free(dim);
 431         return NULL;
 432 }
 433
 434 const char *isl_dim_get_name(struct isl_dim *dim,
 435                                  enum isl_dim_type type, unsigned pos)
 436 {
 437         isl_id *id = get_id(dim, type, pos);
 438         return id ? id->name : NULL;
 439 }
 440
 441 int isl_dim_find_dim_by_id(__isl_keep isl_dim *dim, enum isl_dim_type type,
 442         __isl_keep isl_id *id)
 443 {
 444         int i;
 445         int offset;
 446         int n;
 447
 448         if (!dim || !id)
 449                 return -1;
 450
 451         offset = isl_dim_offset(dim, type);
 452         n = isl_dim_size(dim, type);
 453         for (i = 0; i < n && offset + i < dim->n_id; ++i)
 454                 if (dim->ids[offset + i] == id)
 455                         return i;
 456
 457         return -1;
 458 }
 459
 460 static __isl_keep isl_id *tuple_id(__isl_keep isl_dim *dim,
 461         enum isl_dim_type type)
 462 {
 463         if (!dim)
 464                 return NULL;
 465         if (type == isl_dim_in)
 466                 return dim->tuple_id[0];
 467         if (type == isl_dim_out)
 468                 return dim->tuple_id[1];
 469         return NULL;
 470 }
 471
 472 static __isl_keep isl_dim *nested(__isl_keep isl_dim *dim,
 473         enum isl_dim_type type)
 474 {
 475         if (!dim)
 476                 return NULL;
 477         if (type == isl_dim_in)
 478                 return dim->nested[0];
 479         if (type == isl_dim_out)
 480                 return dim->nested[1];
 481         return NULL;
 482 }
 483
 484 int isl_dim_tuple_match(__isl_keep isl_dim *dim1, enum isl_dim_type dim1_type,
 485                         __isl_keep isl_dim *dim2, enum isl_dim_type dim2_type)
 486 {
 487         isl_id *id1, *id2;
 488         isl_dim *nested1, *nested2;
 489
 490         if (!dim1 || !dim2)
 491                 return -1;
 492
 493         if (n(dim1, dim1_type) != n(dim2, dim2_type))
 494                 return 0;
 495         id1 = tuple_id(dim1, dim1_type);
 496         id2 = tuple_id(dim2, dim2_type);
 497         if (!id1 ^ !id2)
 498                 return 0;
 499         if (id1 && id1 != id2)
 500                 return 0;
 501         nested1 = nested(dim1, dim1_type);
 502         nested2 = nested(dim2, dim2_type);
 503         if (!nested1 ^ !nested2)
 504                 return 0;
 505         if (nested1 && !isl_dim_equal(nested1, nested2))
 506                 return 0;
 507         return 1;
 508 }
 509
 510 static int match(struct isl_dim *dim1, enum isl_dim_type dim1_type,
 511                 struct isl_dim *dim2, enum isl_dim_type dim2_type)
 512 {
 513         int i;
 514
 515         if (!isl_dim_tuple_match(dim1, dim1_type, dim2, dim2_type))
 516                 return 0;
 517
 518         if (!dim1->ids && !dim2->ids)
 519                 return 1;
 520
 521         for (i = 0; i < n(dim1, dim1_type); ++i) {
 522                 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
 523                         return 0;
 524         }
 525         return 1;
 526 }
 527
 528 int isl_dim_match(struct isl_dim *dim1, enum isl_dim_type dim1_type,
 529                 struct isl_dim *dim2, enum isl_dim_type dim2_type)
 530 {
 531         return match(dim1, dim1_type, dim2, dim2_type);
 532 }
 533
 534 static void get_ids(struct isl_dim *dim, enum isl_dim_type type,
 535         unsigned first, unsigned n, __isl_keep isl_id **ids)
 536 {
 537         int i;
 538
 539         for (i = 0; i < n ; ++i)
 540                 ids[i] = get_id(dim, type, first + i);
 541 }
 542
 543 struct isl_dim *isl_dim_extend(struct isl_dim *dim,
 544                         unsigned nparam, unsigned n_in, unsigned n_out)
 545 {
 546         isl_id **ids = NULL;
 547
 548         if (!dim)
 549                 return NULL;
 550         if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
 551                 return dim;
 552
 553         isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
 554         isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
 555         isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
 556
 557         dim = isl_dim_cow(dim);
 558
 559         if (dim->ids) {
 560                 ids = isl_calloc_array(dim->ctx, isl_id *,
 561                                          nparam + n_in + n_out);
 562                 if (!ids)
 563                         goto error;
 564                 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
 565                 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
 566                 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
 567                 free(dim->ids);
 568                 dim->ids = ids;
 569                 dim->n_id = nparam + n_in + n_out;
 570         }
 571         dim->nparam = nparam;
 572         dim->n_in = n_in;
 573         dim->n_out = n_out;
 574
 575         return dim;
 576 error:
 577         free(ids);
 578         isl_dim_free(dim);
 579         return NULL;
 580 }
 581
 582 struct isl_dim *isl_dim_add(struct isl_dim *dim, enum isl_dim_type type,
 583         unsigned n)
 584 {
 585         if (!dim)
 586                 return NULL;
 587         dim = isl_dim_reset(dim, type);
 588         switch (type) {
 589         case isl_dim_param:
 590                 dim = isl_dim_extend(dim,
 591                                         dim->nparam + n, dim->n_in, dim->n_out);
 592                 if (dim && dim->nested[0] &&
 593                     !(dim->nested[0] = isl_dim_add(dim->nested[0],
 594                                                     isl_dim_param, n)))
 595                         goto error;
 596                 if (dim && dim->nested[1] &&
 597                     !(dim->nested[1] = isl_dim_add(dim->nested[1],
 598                                                     isl_dim_param, n)))
 599                         goto error;
 600                 return dim;
 601         case isl_dim_in:
 602                 return isl_dim_extend(dim,
 603                                         dim->nparam, dim->n_in + n, dim->n_out);
 604         case isl_dim_out:
 605                 return isl_dim_extend(dim,
 606                                         dim->nparam, dim->n_in, dim->n_out + n);
 607         default:
 608                 isl_die(dim->ctx, isl_error_invalid,
 609                         "cannot add dimensions of specified type", goto error);
 610         }
 611 error:
 612         isl_dim_free(dim);
 613         return NULL;
 614 }
 615
 616 static int valid_dim_type(enum isl_dim_type type)
 617 {
 618         switch (type) {
 619         case isl_dim_param:
 620         case isl_dim_in:
 621         case isl_dim_out:
 622                 return 1;
 623         default:
 624                 return 0;
 625         }
 626 }
 627
 628 __isl_give isl_dim *isl_dim_insert(__isl_take isl_dim *dim,
 629         enum isl_dim_type type, unsigned pos, unsigned n)
 630 {
 631         isl_id **ids = NULL;
 632
 633         if (!dim)
 634                 return NULL;
 635         if (n == 0)
 636                 return isl_dim_reset(dim, type);
 637
 638         if (!valid_dim_type(type))
 639                 isl_die(dim->ctx, isl_error_invalid,
 640                         "cannot insert dimensions of specified type",
 641                         goto error);
 642
 643         isl_assert(dim->ctx, pos <= isl_dim_size(dim, type), goto error);
 644
 645         dim = isl_dim_cow(dim);
 646         if (!dim)
 647                 return NULL;
 648
 649         if (dim->ids) {
 650                 enum isl_dim_type t;
 651                 int off;
 652                 int s[3];
 653                 int *size = s - isl_dim_param;
 654                 ids = isl_calloc_array(dim->ctx, isl_id *,
 655                                      dim->nparam + dim->n_in + dim->n_out + n);
 656                 if (!ids)
 657                         goto error;
 658                 off = 0;
 659                 size[isl_dim_param] = dim->nparam;
 660                 size[isl_dim_in] = dim->n_in;
 661                 size[isl_dim_out] = dim->n_out;
 662                 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
 663                         if (t != type) {
 664                                 get_ids(dim, t, 0, size[t], ids + off);
 665                                 off += size[t];
 666                         } else {
 667                                 get_ids(dim, t, 0, pos, ids + off);
 668                                 off += pos + n;
 669                                 get_ids(dim, t, pos, size[t] - pos, ids + off);
 670                                 off += size[t] - pos;
 671                         }
 672                 }
 673                 free(dim->ids);
 674                 dim->ids = ids;
 675                 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
 676         }
 677         switch (type) {
 678         case isl_dim_param:     dim->nparam += n; break;
 679         case isl_dim_in:        dim->n_in += n; break;
 680         case isl_dim_out:       dim->n_out += n; break;
 681         default:                ;
 682         }
 683         dim = isl_dim_reset(dim, type);
 684
 685         return dim;
 686 error:
 687         isl_dim_free(dim);
 688         return NULL;
 689 }
 690
 691 __isl_give isl_dim *isl_dim_move(__isl_take isl_dim *dim,
 692         enum isl_dim_type dst_type, unsigned dst_pos,
 693         enum isl_dim_type src_type, unsigned src_pos, unsigned n)
 694 {
 695         int i;
 696
 697         if (!dim)
 698                 return NULL;
 699         if (n == 0)
 700                 return dim;
 701
 702         isl_assert(dim->ctx, src_pos + n <= isl_dim_size(dim, src_type),
 703                 goto error);
 704
 705         if (dst_type == src_type && dst_pos == src_pos)
 706                 return dim;
 707
 708         isl_assert(dim->ctx, dst_type != src_type, goto error);
 709
 710         dim = isl_dim_reset(dim, src_type);
 711         dim = isl_dim_reset(dim, dst_type);
 712
 713         dim = isl_dim_cow(dim);
 714         if (!dim)
 715                 return NULL;
 716
 717         if (dim->ids) {
 718                 isl_id **ids;
 719                 enum isl_dim_type t;
 720                 int off;
 721                 int s[3];
 722                 int *size = s - isl_dim_param;
 723                 ids = isl_calloc_array(dim->ctx, isl_id *,
 724                                          dim->nparam + dim->n_in + dim->n_out);
 725                 if (!ids)
 726                         goto error;
 727                 off = 0;
 728                 size[isl_dim_param] = dim->nparam;
 729                 size[isl_dim_in] = dim->n_in;
 730                 size[isl_dim_out] = dim->n_out;
 731                 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
 732                         if (t == dst_type) {
 733                                 get_ids(dim, t, 0, dst_pos, ids + off);
 734                                 off += dst_pos;
 735                                 get_ids(dim, src_type, src_pos, n, ids + off);
 736                                 off += n;
 737                                 get_ids(dim, t, dst_pos, size[t] - dst_pos,
 738                                                 ids + off);
 739                                 off += size[t] - dst_pos;
 740                         } else if (t == src_type) {
 741                                 get_ids(dim, t, 0, src_pos, ids + off);
 742                                 off += src_pos;
 743                                 get_ids(dim, t, src_pos + n,
 744                                             size[t] - src_pos - n, ids + off);
 745                                 off += size[t] - src_pos - n;
 746                         } else {
 747                                 get_ids(dim, t, 0, size[t], ids + off);
 748                                 off += size[t];
 749                         }
 750                 }
 751                 free(dim->ids);
 752                 dim->ids = ids;
 753                 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
 754         }
 755
 756         switch (dst_type) {
 757         case isl_dim_param:     dim->nparam += n; break;
 758         case isl_dim_in:        dim->n_in += n; break;
 759         case isl_dim_out:       dim->n_out += n; break;
 760         default:                ;
 761         }
 762
 763         switch (src_type) {
 764         case isl_dim_param:     dim->nparam -= n; break;
 765         case isl_dim_in:        dim->n_in -= n; break;
 766         case isl_dim_out:       dim->n_out -= n; break;
 767         default:                ;
 768         }
 769
 770         if (dst_type != isl_dim_param && src_type != isl_dim_param)
 771                 return dim;
 772
 773         for (i = 0; i < 2; ++i) {
 774                 if (!dim->nested[i])
 775                         continue;
 776                 dim->nested[i] = isl_dim_replace(dim->nested[i],
 777                                                  isl_dim_param, dim);
 778                 if (!dim->nested[i])
 779                         goto error;
 780         }
 781
 782         return dim;
 783 error:
 784         isl_dim_free(dim);
 785         return NULL;
 786 }
 787
 788 struct isl_dim *isl_dim_join(struct isl_dim *left, struct isl_dim *right)
 789 {
 790         struct isl_dim *dim;
 791
 792         if (!left || !right)
 793                 goto error;
 794
 795         isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
 796                         goto error);
 797         isl_assert(left->ctx,
 798                 isl_dim_tuple_match(left, isl_dim_out, right, isl_dim_in),
 799                 goto error);
 800
 801         dim = isl_dim_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
 802         if (!dim)
 803                 goto error;
 804
 805         dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
 806         dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
 807         dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
 808
 809         if (dim && left->tuple_id[0] &&
 810             !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
 811                 goto error;
 812         if (dim && right->tuple_id[1] &&
 813             !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
 814                 goto error;
 815         if (dim && left->nested[0] &&
 816             !(dim->nested[0] = isl_dim_copy(left->nested[0])))
 817                 goto error;
 818         if (dim && right->nested[1] &&
 819             !(dim->nested[1] = isl_dim_copy(right->nested[1])))
 820                 goto error;
 821
 822         isl_dim_free(left);
 823         isl_dim_free(right);
 824
 825         return dim;
 826 error:
 827         isl_dim_free(left);
 828         isl_dim_free(right);
 829         return NULL;
 830 }
 831
 832 struct isl_dim *isl_dim_product(struct isl_dim *left, struct isl_dim *right)
 833 {
 834         isl_dim *dom1, *dom2, *nest1, *nest2;
 835
 836         if (!left || !right)
 837                 goto error;
 838
 839         isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
 840                         goto error);
 841
 842         dom1 = isl_dim_domain(isl_dim_copy(left));
 843         dom2 = isl_dim_domain(isl_dim_copy(right));
 844         nest1 = isl_dim_wrap(isl_dim_join(isl_dim_reverse(dom1), dom2));
 845
 846         dom1 = isl_dim_range(left);
 847         dom2 = isl_dim_range(right);
 848         nest2 = isl_dim_wrap(isl_dim_join(isl_dim_reverse(dom1), dom2));
 849
 850         return isl_dim_join(isl_dim_reverse(nest1), nest2);
 851 error:
 852         isl_dim_free(left);
 853         isl_dim_free(right);
 854         return NULL;
 855 }
 856
 857 __isl_give isl_dim *isl_dim_range_product(__isl_take isl_dim *left,
 858         __isl_take isl_dim *right)
 859 {
 860         isl_dim *dom, *ran1, *ran2, *nest;
 861
 862         if (!left || !right)
 863                 goto error;
 864
 865         isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
 866                         goto error);
 867         if (!isl_dim_tuple_match(left, isl_dim_in, right, isl_dim_in))
 868                 isl_die(left->ctx, isl_error_invalid,
 869                         "domains need to match", goto error);
 870
 871         dom = isl_dim_domain(isl_dim_copy(left));
 872
 873         ran1 = isl_dim_range(left);
 874         ran2 = isl_dim_range(right);
 875         nest = isl_dim_wrap(isl_dim_join(isl_dim_reverse(ran1), ran2));
 876
 877         return isl_dim_join(isl_dim_reverse(dom), nest);
 878 error:
 879         isl_dim_free(left);
 880         isl_dim_free(right);
 881         return NULL;
 882 }
 883
 884 __isl_give isl_dim *isl_dim_map_from_set(__isl_take isl_dim *dim)
 885 {
 886         isl_id **ids = NULL;
 887
 888         if (!dim)
 889                 return NULL;
 890         isl_assert(dim->ctx, dim->n_in == 0, goto error);
 891         if (dim->n_out == 0 && !isl_dim_is_named_or_nested(dim, isl_dim_out))
 892                 return dim;
 893         dim = isl_dim_cow(dim);
 894         if (!dim)
 895                 return NULL;
 896         if (dim->ids) {
 897                 ids = isl_calloc_array(dim->ctx, isl_id *,
 898                                         dim->nparam + dim->n_out + dim->n_out);
 899                 if (!ids)
 900                         goto error;
 901                 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
 902                 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
 903         }
 904         dim->n_in = dim->n_out;
 905         if (ids) {
 906                 free(dim->ids);
 907                 dim->ids = ids;
 908                 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
 909                 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
 910         }
 911         isl_id_free(dim->tuple_id[0]);
 912         dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
 913         isl_dim_free(dim->nested[0]);
 914         dim->nested[0] = isl_dim_copy(dim->nested[1]);
 915         return dim;
 916 error:
 917         isl_dim_free(dim);
 918         return NULL;
 919 }
 920
 921 static __isl_give isl_dim *set_ids(struct isl_dim *dim, enum isl_dim_type type,
 922         unsigned first, unsigned n, __isl_take isl_id **ids)
 923 {
 924         int i;
 925
 926         for (i = 0; i < n ; ++i)
 927                 dim = set_id(dim, type, first + i, ids[i]);
 928
 929         return dim;
 930 }
 931
 932 struct isl_dim *isl_dim_reverse(struct isl_dim *dim)
 933 {
 934         unsigned t;
 935         isl_dim *nested;
 936         isl_id **ids = NULL;
 937         isl_id *id;
 938
 939         if (!dim)
 940                 return NULL;
 941         if (match(dim, isl_dim_in, dim, isl_dim_out))
 942                 return dim;
 943
 944         dim = isl_dim_cow(dim);
 945         if (!dim)
 946                 return NULL;
 947
 948         id = dim->tuple_id[0];
 949         dim->tuple_id[0] = dim->tuple_id[1];
 950         dim->tuple_id[1] = id;
 951
 952         nested = dim->nested[0];
 953         dim->nested[0] = dim->nested[1];
 954         dim->nested[1] = nested;
 955
 956         if (dim->ids) {
 957                 ids = isl_alloc_array(dim->ctx, isl_id *,
 958                                         dim->n_in + dim->n_out);
 959                 if (!ids)
 960                         goto error;
 961                 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
 962                 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
 963         }
 964
 965         t = dim->n_in;
 966         dim->n_in = dim->n_out;
 967         dim->n_out = t;
 968
 969         if (dim->ids) {
 970                 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
 971                 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
 972                 free(ids);
 973         }
 974
 975         return dim;
 976 error:
 977         free(ids);
 978         isl_dim_free(dim);
 979         return NULL;
 980 }
 981
 982 struct isl_dim *isl_dim_drop(struct isl_dim *dim, enum isl_dim_type type,
 983                 unsigned first, unsigned num)
 984 {
 985         int i;
 986
 987         if (!dim)
 988                 return NULL;
 989
 990         if (num == 0)
 991                 return isl_dim_reset(dim, type);
 992
 993         if (!valid_dim_type(type))
 994                 isl_die(dim->ctx, isl_error_invalid,
 995                         "cannot drop dimensions of specified type", goto error);
 996
 997         isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
 998         dim = isl_dim_cow(dim);
 999         if (!dim)
1000                 goto error;
1001         if (dim->ids) {
1002                 dim = extend_ids(dim);
1003                 if (!dim)
1004                         goto error;
1005                 for (i = 0; i < num; ++i)
1006                         isl_id_free(get_id(dim, type, first + i));
1007                 for (i = first+num; i < n(dim, type); ++i)
1008                         set_id(dim, type, i - num, get_id(dim, type, i));
1009                 switch (type) {
1010                 case isl_dim_param:
1011                         get_ids(dim, isl_dim_in, 0, dim->n_in,
1012                                 dim->ids + offset(dim, isl_dim_in) - num);
1013                 case isl_dim_in:
1014                         get_ids(dim, isl_dim_out, 0, dim->n_out,
1015                                 dim->ids + offset(dim, isl_dim_out) - num);
1016                 default:
1017                         ;
1018                 }
1019                 dim->n_id -= num;
1020         }
1021         switch (type) {
1022         case isl_dim_param:     dim->nparam -= num; break;
1023         case isl_dim_in:        dim->n_in -= num; break;
1024         case isl_dim_out:       dim->n_out -= num; break;
1025         default:                ;
1026         }
1027         dim = isl_dim_reset(dim, type);
1028         if (type == isl_dim_param) {
1029                 if (dim && dim->nested[0] &&
1030                     !(dim->nested[0] = isl_dim_drop(dim->nested[0],
1031                                                     isl_dim_param, first, num)))
1032                         goto error;
1033                 if (dim && dim->nested[1] &&
1034                     !(dim->nested[1] = isl_dim_drop(dim->nested[1],
1035                                                     isl_dim_param, first, num)))
1036                         goto error;
1037         }
1038         return dim;
1039 error:
1040         isl_dim_free(dim);
1041         return NULL;
1042 }
1043
1044 struct isl_dim *isl_dim_drop_inputs(struct isl_dim *dim,
1045                 unsigned first, unsigned n)
1046 {
1047         if (!dim)
1048                 return NULL;
1049         return isl_dim_drop(dim, isl_dim_in, first, n);
1050 }
1051
1052 struct isl_dim *isl_dim_drop_outputs(struct isl_dim *dim,
1053                 unsigned first, unsigned n)
1054 {
1055         if (!dim)
1056                 return NULL;
1057         return isl_dim_drop(dim, isl_dim_out, first, n);
1058 }
1059
1060 struct isl_dim *isl_dim_domain(struct isl_dim *dim)
1061 {
1062         if (!dim)
1063                 return NULL;
1064         dim = isl_dim_drop_outputs(dim, 0, dim->n_out);
1065         return isl_dim_reverse(dim);
1066 }
1067
1068 __isl_give isl_dim *isl_dim_from_domain(__isl_take isl_dim *dim)
1069 {
1070         return isl_dim_reverse(dim);
1071 }
1072
1073 struct isl_dim *isl_dim_range(struct isl_dim *dim)
1074 {
1075         if (!dim)
1076                 return NULL;
1077         return isl_dim_drop_inputs(dim, 0, dim->n_in);
1078 }
1079
1080 __isl_give isl_dim *isl_dim_from_range(__isl_take isl_dim *dim)
1081 {
1082         return dim;
1083 }
1084
1085 __isl_give isl_dim *isl_dim_as_set_dim(__isl_take isl_dim *dim)
1086 {
1087         dim = isl_dim_cow(dim);
1088         if (!dim)
1089                 return NULL;
1090
1091         dim->n_out += dim->n_in;
1092         dim->n_in = 0;
1093         dim = isl_dim_reset(dim, isl_dim_in);
1094         dim = isl_dim_reset(dim, isl_dim_out);
1095
1096         return dim;
1097 }
1098
1099 struct isl_dim *isl_dim_underlying(struct isl_dim *dim, unsigned n_div)
1100 {
1101         int i;
1102
1103         if (!dim)
1104                 return NULL;
1105         if (n_div == 0 &&
1106             dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1107                 return isl_dim_reset(isl_dim_reset(dim, isl_dim_in), isl_dim_out);
1108         dim = isl_dim_cow(dim);
1109         if (!dim)
1110                 return NULL;
1111         dim->n_out += dim->nparam + dim->n_in + n_div;
1112         dim->nparam = 0;
1113         dim->n_in = 0;
1114
1115         for (i = 0; i < dim->n_id; ++i)
1116                 isl_id_free(get_id(dim, isl_dim_out, i));
1117         dim->n_id = 0;
1118         dim = isl_dim_reset(dim, isl_dim_in);
1119         dim = isl_dim_reset(dim, isl_dim_out);
1120
1121         return dim;
1122 }
1123
1124 unsigned isl_dim_total(struct isl_dim *dim)
1125 {
1126         return dim ? dim->nparam + dim->n_in + dim->n_out : 0;
1127 }
1128
1129 int isl_dim_equal(struct isl_dim *dim1, struct isl_dim *dim2)
1130 {
1131         if (!dim1 || !dim2)
1132                 return -1;
1133         return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1134                isl_dim_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1135                isl_dim_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1136 }
1137
1138 int isl_dim_compatible(struct isl_dim *dim1, struct isl_dim *dim2)
1139 {
1140         return dim1->nparam == dim2->nparam &&
1141                dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1142 }
1143
1144 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_dim *dim)
1145 {
1146         int i;
1147         isl_id *id;
1148
1149         if (!dim)
1150                 return hash;
1151
1152         hash = isl_hash_builtin(hash, dim->nparam);
1153         hash = isl_hash_builtin(hash, dim->n_in);
1154         hash = isl_hash_builtin(hash, dim->n_out);
1155
1156         for (i = 0; i < dim->nparam; ++i) {
1157                 id = get_id(dim, isl_dim_param, i);
1158                 hash = isl_hash_id(hash, id);
1159         }
1160
1161         id = tuple_id(dim, isl_dim_in);
1162         hash = isl_hash_id(hash, id);
1163         id = tuple_id(dim, isl_dim_out);
1164         hash = isl_hash_id(hash, id);
1165
1166         hash = isl_hash_dim(hash, dim->nested[0]);
1167         hash = isl_hash_dim(hash, dim->nested[1]);
1168
1169         return hash;
1170 }
1171
1172 uint32_t isl_dim_get_hash(__isl_keep isl_dim *dim)
1173 {
1174         uint32_t hash;
1175
1176         if (!dim)
1177                 return 0;
1178
1179         hash = isl_hash_init();
1180         hash = isl_hash_dim(hash, dim);
1181
1182         return hash;
1183 }
1184
1185 int isl_dim_is_wrapping(__isl_keep isl_dim *dim)
1186 {
1187         if (!dim)
1188                 return -1;
1189
1190         if (dim->n_in != 0 || dim->tuple_id[0] || dim->nested[0])
1191                 return 0;
1192
1193         return dim->nested[1] != NULL;
1194 }
1195
1196 __isl_give isl_dim *isl_dim_wrap(__isl_take isl_dim *dim)
1197 {
1198         isl_dim *wrap;
1199
1200         if (!dim)
1201                 return NULL;
1202
1203         wrap = isl_dim_alloc(dim->ctx, dim->nparam, 0, dim->n_in + dim->n_out);
1204
1205         wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1206         wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1207         wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1208
1209         if (!wrap)
1210                 goto error;
1211
1212         wrap->nested[1] = dim;
1213
1214         return wrap;
1215 error:
1216         isl_dim_free(dim);
1217         return NULL;
1218 }
1219
1220 __isl_give isl_dim *isl_dim_unwrap(__isl_take isl_dim *dim)
1221 {
1222         isl_dim *unwrap;
1223
1224         if (!dim)
1225                 return NULL;
1226
1227         if (!isl_dim_is_wrapping(dim))
1228                 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1229                         goto error);
1230
1231         unwrap = isl_dim_copy(dim->nested[1]);
1232         isl_dim_free(dim);
1233
1234         return unwrap;
1235 error:
1236         isl_dim_free(dim);
1237         return NULL;
1238 }
1239
1240 int isl_dim_is_named_or_nested(__isl_keep isl_dim *dim, enum isl_dim_type type)
1241 {
1242         if (type != isl_dim_in && type != isl_dim_out)
1243                 return 0;
1244         if (!dim)
1245                 return -1;
1246         if (dim->tuple_id[type - isl_dim_in])
1247                 return 1;
1248         if (dim->nested[type - isl_dim_in])
1249                 return 1;
1250         return 0;
1251 }
1252
1253 int isl_dim_may_be_set(__isl_keep isl_dim *dim)
1254 {
1255         if (!dim)
1256                 return -1;
1257         if (isl_dim_size(dim, isl_dim_in) != 0)
1258                 return 0;
1259         if (isl_dim_is_named_or_nested(dim, isl_dim_in))
1260                 return 0;
1261         return 1;
1262 }
1263
1264 __isl_give isl_dim *isl_dim_reset(__isl_take isl_dim *dim,
1265         enum isl_dim_type type)
1266 {
1267         if (!isl_dim_is_named_or_nested(dim, type))
1268                 return dim;
1269
1270         dim = isl_dim_cow(dim);
1271         if (!dim)
1272                 return NULL;
1273
1274         isl_id_free(dim->tuple_id[type - isl_dim_in]);
1275         dim->tuple_id[type - isl_dim_in] = NULL;
1276         isl_dim_free(dim->nested[type - isl_dim_in]);
1277         dim->nested[type - isl_dim_in] = NULL;
1278
1279         return dim;
1280 }
1281
1282 __isl_give isl_dim *isl_dim_flatten(__isl_take isl_dim *dim)
1283 {
1284         if (!dim)
1285                 return NULL;
1286         if (!dim->nested[0] && !dim->nested[1])
1287                 return dim;
1288
1289         if (dim->nested[0])
1290                 dim = isl_dim_reset(dim, isl_dim_in);
1291         if (dim && dim->nested[1])
1292                 dim = isl_dim_reset(dim, isl_dim_out);
1293
1294         return dim;
1295 }
1296
1297 __isl_give isl_dim *isl_dim_flatten_range(__isl_take isl_dim *dim)
1298 {
1299         if (!dim)
1300                 return NULL;
1301         if (!dim->nested[1])
1302                 return dim;
1303
1304         return isl_dim_reset(dim, isl_dim_out);
1305 }
1306
1307 /* Replace the dimensions of the given type of dst by those of src.
1308  */
1309 __isl_give isl_dim *isl_dim_replace(__isl_take isl_dim *dst,
1310         enum isl_dim_type type, __isl_keep isl_dim *src)
1311 {
1312         dst = isl_dim_cow(dst);
1313
1314         if (!dst || !src)
1315                 goto error;
1316
1317         dst = isl_dim_drop(dst, type, 0, isl_dim_size(dst, type));
1318         dst = isl_dim_add(dst, type, isl_dim_size(src, type));
1319         dst = copy_ids(dst, type, 0, src, type);
1320
1321         if (dst && type == isl_dim_param) {
1322                 int i;
1323                 for (i = 0; i <= 1; ++i) {
1324                         if (!dst->nested[i])
1325                                 continue;
1326                         dst->nested[i] = isl_dim_replace(dst->nested[i],
1327                                                          type, src);
1328                         if (!dst->nested[i])
1329                                 goto error;
1330                 }
1331         }
1332
1333         return dst;
1334 error:
1335         isl_dim_free(dst);
1336         return NULL;
1337 }
1338
1339 /* Given a dimension specification "dim" of a set, create a dimension
1340  * specification for the lift of the set.  In particular, the result
1341  * is of the form [dim -> local[..]], with n_local variables in the
1342  * range of the wrapped map.
1343  */
1344 __isl_give isl_dim *isl_dim_lift(__isl_take isl_dim *dim, unsigned n_local)
1345 {
1346         isl_dim *local_dim;
1347
1348         if (!dim)
1349                 return NULL;
1350
1351         local_dim = isl_dim_dup(dim);
1352         local_dim = isl_dim_drop(local_dim, isl_dim_set, 0, dim->n_out);
1353         local_dim = isl_dim_add(local_dim, isl_dim_set, n_local);
1354         local_dim = isl_dim_set_tuple_name(local_dim, isl_dim_set, "local");
1355         dim = isl_dim_join(isl_dim_from_domain(dim),
1356                             isl_dim_from_range(local_dim));
1357         dim = isl_dim_wrap(dim);
1358         dim = isl_dim_set_tuple_name(dim, isl_dim_set, "lifted");
1359
1360         return dim;
1361 }
1362
1363 int isl_dim_can_zip(__isl_keep isl_dim *dim)
1364 {
1365         if (!dim)
1366                 return -1;
1367
1368         return dim->nested[0] && dim->nested[1];
1369 }
1370
1371 __isl_give isl_dim *isl_dim_zip(__isl_take isl_dim *dim)
1372 {
1373         isl_dim *dom, *ran;
1374         isl_dim *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1375
1376         if (!isl_dim_can_zip(dim))
1377                 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1378                         goto error);
1379
1380         if (!dim)
1381                 return 0;
1382         dom = isl_dim_unwrap(isl_dim_domain(isl_dim_copy(dim)));
1383         ran = isl_dim_unwrap(isl_dim_range(dim));
1384         dom_dom = isl_dim_domain(isl_dim_copy(dom));
1385         dom_ran = isl_dim_range(dom);
1386         ran_dom = isl_dim_domain(isl_dim_copy(ran));
1387         ran_ran = isl_dim_range(ran);
1388         dom = isl_dim_join(isl_dim_from_domain(dom_dom),
1389                            isl_dim_from_range(ran_dom));
1390         ran = isl_dim_join(isl_dim_from_domain(dom_ran),
1391                            isl_dim_from_range(ran_ran));
1392         return isl_dim_join(isl_dim_from_domain(isl_dim_wrap(dom)),
1393                             isl_dim_from_range(isl_dim_wrap(ran)));
1394 error:
1395         isl_dim_free(dim);
1396         return NULL;
1397 }
1398
1399 int isl_dim_has_named_params(__isl_keep isl_dim *dim)
1400 {
1401         int i;
1402         unsigned off;
1403
1404         if (!dim)
1405                 return -1;
1406         if (dim->nparam == 0)
1407                 return 1;
1408         off = isl_dim_offset(dim, isl_dim_param);
1409         if (off + dim->nparam > dim->n_id)
1410                 return 0;
1411         for (i = 0; i < dim->nparam; ++i)
1412                 if (!dim->ids[off + i])
1413                         return 0;
1414         return 1;
1415 }
1416
1417 /* Align the initial parameters of dim1 to match the order in dim2.
1418  */
1419 __isl_give isl_dim *isl_dim_align_params(__isl_take isl_dim *dim1,
1420         __isl_take isl_dim *dim2)
1421 {
1422         isl_reordering *exp;
1423
1424         if (!isl_dim_has_named_params(dim1) || !isl_dim_has_named_params(dim2))
1425                 isl_die(isl_dim_get_ctx(dim1), isl_error_invalid,
1426                         "parameter alignment requires named parameters",
1427                         goto error);
1428
1429         exp = isl_parameter_alignment_reordering(dim1, dim2);
1430         isl_dim_free(dim1);
1431         isl_dim_free(dim2);
1432         if (!exp)
1433                 return NULL;
1434         dim1 = isl_dim_copy(exp->dim);
1435         isl_reordering_free(exp);
1436         return dim1;
1437 error:
1438         isl_dim_free(dim1);
1439         isl_dim_free(dim2);
1440         return NULL;
1441 }