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_name.h"
  16
  17 isl_ctx *isl_dim_get_ctx(__isl_keep isl_dim *dim)
  18 {
  19         return dim ? dim->ctx : NULL;
  20 }
  21
  22 struct isl_dim *isl_dim_alloc(struct isl_ctx *ctx,
  23                         unsigned nparam, unsigned n_in, unsigned n_out)
  24 {
  25         struct isl_dim *dim;
  26
  27         dim = isl_alloc_type(ctx, struct isl_dim);
  28         if (!dim)
  29                 return NULL;
  30
  31         dim->ctx = ctx;
  32         isl_ctx_ref(ctx);
  33         dim->ref = 1;
  34         dim->nparam = nparam;
  35         dim->n_in = n_in;
  36         dim->n_out = n_out;
  37
  38         dim->tuple_name[0] = NULL;
  39         dim->tuple_name[1] = NULL;
  40
  41         dim->nested[0] = NULL;
  42         dim->nested[1] = NULL;
  43
  44         dim->n_name = 0;
  45         dim->names = NULL;
  46
  47         return dim;
  48 }
  49
  50 struct isl_dim *isl_dim_set_alloc(struct isl_ctx *ctx,
  51                         unsigned nparam, unsigned dim)
  52 {
  53         return isl_dim_alloc(ctx, nparam, 0, dim);
  54 }
  55
  56 static unsigned global_pos(struct isl_dim *dim,
  57                                  enum isl_dim_type type, unsigned pos)
  58 {
  59         struct isl_ctx *ctx = dim->ctx;
  60
  61         switch (type) {
  62         case isl_dim_param:
  63                 isl_assert(ctx, pos < dim->nparam, return isl_dim_total(dim));
  64                 return pos;
  65         case isl_dim_in:
  66                 isl_assert(ctx, pos < dim->n_in, return isl_dim_total(dim));
  67                 return pos + dim->nparam;
  68         case isl_dim_out:
  69                 isl_assert(ctx, pos < dim->n_out, return isl_dim_total(dim));
  70                 return pos + dim->nparam + dim->n_in;
  71         default:
  72                 isl_assert(ctx, 0, return isl_dim_total(dim));
  73         }
  74         return isl_dim_total(dim);
  75 }
  76
  77 /* Extend length of names array to the total number of dimensions.
  78  */
  79 static __isl_give isl_dim *extend_names(__isl_take isl_dim *dim)
  80 {
  81         struct isl_name **names;
  82         int i;
  83
  84         if (isl_dim_total(dim) <= dim->n_name)
  85                 return dim;
  86
  87         if (!dim->names) {
  88                 dim->names = isl_calloc_array(dim->ctx,
  89                                 struct isl_name *, isl_dim_total(dim));
  90                 if (!dim->names)
  91                         goto error;
  92         } else {
  93                 names = isl_realloc_array(dim->ctx, dim->names,
  94                                 struct isl_name *, isl_dim_total(dim));
  95                 if (!names)
  96                         goto error;
  97                 dim->names = names;
  98                 for (i = dim->n_name; i < isl_dim_total(dim); ++i)
  99                         dim->names[i] = NULL;
 100         }
 101
 102         dim->n_name = isl_dim_total(dim);
 103
 104         return dim;
 105 error:
 106         isl_dim_free(dim);
 107         return NULL;
 108 }
 109
 110 static struct isl_dim *set_name(struct isl_dim *dim,
 111                                  enum isl_dim_type type, unsigned pos,
 112                                  struct isl_name *name)
 113 {
 114         struct isl_ctx *ctx = dim->ctx;
 115         dim = isl_dim_cow(dim);
 116
 117         if (!dim)
 118                 goto error;
 119
 120         pos = global_pos(dim, type, pos);
 121         if (pos == isl_dim_total(dim))
 122                 goto error;
 123
 124         if (pos >= dim->n_name) {
 125                 if (!name)
 126                         return dim;
 127                 dim = extend_names(dim);
 128                 if (!dim)
 129                         goto error;
 130         }
 131
 132         dim->names[pos] = name;
 133
 134         return dim;
 135 error:
 136         isl_name_free(ctx, name);
 137         isl_dim_free(dim);
 138         return NULL;
 139 }
 140
 141 static struct isl_name *get_name(struct isl_dim *dim,
 142                                  enum isl_dim_type type, unsigned pos)
 143 {
 144         if (!dim)
 145                 return NULL;
 146
 147         pos = global_pos(dim, type, pos);
 148         if (pos == isl_dim_total(dim))
 149                 return NULL;
 150         if (pos >= dim->n_name)
 151                 return NULL;
 152         return dim->names[pos];
 153 }
 154
 155 static unsigned offset(struct isl_dim *dim, enum isl_dim_type type)
 156 {
 157         switch (type) {
 158         case isl_dim_param:     return 0;
 159         case isl_dim_in:        return dim->nparam;
 160         case isl_dim_out:       return dim->nparam + dim->n_in;
 161         default:                return 0;
 162         }
 163 }
 164
 165 static unsigned n(struct isl_dim *dim, enum isl_dim_type type)
 166 {
 167         switch (type) {
 168         case isl_dim_param:     return dim->nparam;
 169         case isl_dim_in:        return dim->n_in;
 170         case isl_dim_out:       return 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 struct isl_dim *copy_names(struct isl_dim *dst,
 190         enum isl_dim_type dst_type, unsigned offset, struct isl_dim *src,
 191         enum isl_dim_type src_type)
 192 {
 193         int i;
 194         struct isl_name *name;
 195
 196         if (!dst)
 197                 return NULL;
 198
 199         for (i = 0; i < n(src, src_type); ++i) {
 200                 name = get_name(src, src_type, i);
 201                 if (!name)
 202                         continue;
 203                 dst = set_name(dst, dst_type, offset + i,
 204                                         isl_name_copy(dst->ctx, name));
 205                 if (!dst)
 206                         return NULL;
 207         }
 208         return dst;
 209 }
 210
 211 struct isl_dim *isl_dim_dup(struct isl_dim *dim)
 212 {
 213         struct isl_dim *dup;
 214         if (!dim)
 215                 return NULL;
 216         dup = isl_dim_alloc(dim->ctx, dim->nparam, dim->n_in, dim->n_out);
 217         if (dim->tuple_name[0] &&
 218             !(dup->tuple_name[0] = isl_name_copy(dim->ctx, dim->tuple_name[0])))
 219                 goto error;
 220         if (dim->tuple_name[1] &&
 221             !(dup->tuple_name[1] = isl_name_copy(dim->ctx, dim->tuple_name[1])))
 222                 goto error;
 223         if (dim->nested[0] && !(dup->nested[0] = isl_dim_copy(dim->nested[0])))
 224                 goto error;
 225         if (dim->nested[1] && !(dup->nested[1] = isl_dim_copy(dim->nested[1])))
 226                 goto error;
 227         if (!dim->names)
 228                 return dup;
 229         dup = copy_names(dup, isl_dim_param, 0, dim, isl_dim_param);
 230         dup = copy_names(dup, isl_dim_in, 0, dim, isl_dim_in);
 231         dup = copy_names(dup, isl_dim_out, 0, dim, isl_dim_out);
 232         return dup;
 233 error:
 234         isl_dim_free(dup);
 235         return NULL;
 236 }
 237
 238 struct isl_dim *isl_dim_cow(struct isl_dim *dim)
 239 {
 240         if (!dim)
 241                 return NULL;
 242
 243         if (dim->ref == 1)
 244                 return dim;
 245         dim->ref--;
 246         return isl_dim_dup(dim);
 247 }
 248
 249 struct isl_dim *isl_dim_copy(struct isl_dim *dim)
 250 {
 251         if (!dim)
 252                 return NULL;
 253
 254         dim->ref++;
 255         return dim;
 256 }
 257
 258 void isl_dim_free(struct isl_dim *dim)
 259 {
 260         int i;
 261
 262         if (!dim)
 263                 return;
 264
 265         if (--dim->ref > 0)
 266                 return;
 267
 268         isl_name_free(dim->ctx, dim->tuple_name[0]);
 269         isl_name_free(dim->ctx, dim->tuple_name[1]);
 270
 271         isl_dim_free(dim->nested[0]);
 272         isl_dim_free(dim->nested[1]);
 273
 274         for (i = 0; i < dim->n_name; ++i)
 275                 isl_name_free(dim->ctx, dim->names[i]);
 276         free(dim->names);
 277         isl_ctx_deref(dim->ctx);
 278
 279         free(dim);
 280 }
 281
 282 static int name_ok(isl_ctx *ctx, const char *s)
 283 {
 284         char *p;
 285         long dummy;
 286
 287         dummy = strtol(s, &p, 0);
 288         if (p != s)
 289                 isl_die(ctx, isl_error_invalid, "name looks like a number",
 290                         return 0);
 291
 292         return 1;
 293 }
 294
 295 __isl_give isl_dim *isl_dim_set_tuple_name(__isl_take isl_dim *dim,
 296         enum isl_dim_type type, const char *s)
 297 {
 298         struct isl_name *name;
 299
 300         dim = isl_dim_cow(dim);
 301         if (!dim)
 302                 return NULL;
 303         if (type != isl_dim_in && type != isl_dim_out)
 304                 isl_die(dim->ctx, isl_error_invalid,
 305                         "only input, output and set tuples can have names",
 306                         goto error);
 307         if (!s) {
 308                 name = NULL;
 309         } else {
 310                 if (!name_ok(dim->ctx, s))
 311                         goto error;
 312                 name = isl_name_get(dim->ctx, s);
 313                 if (!name)
 314                         goto error;
 315         }
 316
 317         isl_name_free(dim->ctx, dim->tuple_name[type - isl_dim_in]);
 318         dim->tuple_name[type - isl_dim_in] = name;
 319
 320         return dim;
 321 error:
 322         isl_dim_free(dim);
 323         return NULL;
 324 }
 325
 326 const char *isl_dim_get_tuple_name(__isl_keep isl_dim *dim,
 327          enum isl_dim_type type)
 328 {
 329         struct isl_name *name;
 330         if (!dim)
 331                 return NULL;
 332         if (type != isl_dim_in && type != isl_dim_out)
 333                 return NULL;
 334         name = dim->tuple_name[type - isl_dim_in];
 335         return name ? name->name : NULL;
 336 }
 337
 338 struct isl_dim *isl_dim_set_name(struct isl_dim *dim,
 339                                  enum isl_dim_type type, unsigned pos,
 340                                  const char *s)
 341 {
 342         struct isl_name *name;
 343
 344         if (!dim)
 345                 return NULL;
 346         if (!name_ok(dim->ctx, s))
 347                 goto error;
 348         isl_name_free(dim->ctx, get_name(dim, type, pos));
 349         name = isl_name_get(dim->ctx, s);
 350         if (!name)
 351                 goto error;
 352         return set_name(dim, type, pos, name);
 353 error:
 354         isl_dim_free(dim);
 355         return NULL;
 356 }
 357
 358 const char *isl_dim_get_name(struct isl_dim *dim,
 359                                  enum isl_dim_type type, unsigned pos)
 360 {
 361         struct isl_name *name = get_name(dim, type, pos);
 362         return name ? name->name : NULL;
 363 }
 364
 365 static struct isl_name *tuple_name(__isl_keep isl_dim *dim,
 366         enum isl_dim_type type)
 367 {
 368         if (!dim)
 369                 return NULL;
 370         if (type == isl_dim_in)
 371                 return dim->tuple_name[0];
 372         if (type == isl_dim_out)
 373                 return dim->tuple_name[1];
 374         return NULL;
 375 }
 376
 377 static __isl_keep isl_dim *nested(__isl_keep isl_dim *dim,
 378         enum isl_dim_type type)
 379 {
 380         if (!dim)
 381                 return NULL;
 382         if (type == isl_dim_in)
 383                 return dim->nested[0];
 384         if (type == isl_dim_out)
 385                 return dim->nested[1];
 386         return NULL;
 387 }
 388
 389 int isl_dim_tuple_match(__isl_keep isl_dim *dim1, enum isl_dim_type dim1_type,
 390                         __isl_keep isl_dim *dim2, enum isl_dim_type dim2_type)
 391 {
 392         struct isl_name *name1, *name2;
 393         isl_dim *nested1, *nested2;
 394
 395         if (n(dim1, dim1_type) != n(dim2, dim2_type))
 396                 return 0;
 397         name1 = tuple_name(dim1, dim1_type);
 398         name2 = tuple_name(dim2, dim2_type);
 399         if (!name1 ^ !name2)
 400                 return 0;
 401         if (name1 && name1->name != name2->name)
 402                 return 0;
 403         nested1 = nested(dim1, dim1_type);
 404         nested2 = nested(dim2, dim2_type);
 405         if (!nested1 ^ !nested2)
 406                 return 0;
 407         if (nested1 && !isl_dim_equal(nested1, nested2))
 408                 return 0;
 409         return 1;
 410 }
 411
 412 static int match(struct isl_dim *dim1, enum isl_dim_type dim1_type,
 413                 struct isl_dim *dim2, enum isl_dim_type dim2_type)
 414 {
 415         int i;
 416
 417         if (!isl_dim_tuple_match(dim1, dim1_type, dim2, dim2_type))
 418                 return 0;
 419
 420         if (!dim1->names && !dim2->names)
 421                 return 1;
 422
 423         for (i = 0; i < n(dim1, dim1_type); ++i) {
 424                 if (get_name(dim1, dim1_type, i) !=
 425                     get_name(dim2, dim2_type, i))
 426                         return 0;
 427         }
 428         return 1;
 429 }
 430
 431 int isl_dim_match(struct isl_dim *dim1, enum isl_dim_type dim1_type,
 432                 struct isl_dim *dim2, enum isl_dim_type dim2_type)
 433 {
 434         return match(dim1, dim1_type, dim2, dim2_type);
 435 }
 436
 437 static void get_names(struct isl_dim *dim, enum isl_dim_type type,
 438         unsigned first, unsigned n, struct isl_name **names)
 439 {
 440         int i;
 441
 442         for (i = 0; i < n ; ++i)
 443                 names[i] = get_name(dim, type, first+i);
 444 }
 445
 446 struct isl_dim *isl_dim_extend(struct isl_dim *dim,
 447                         unsigned nparam, unsigned n_in, unsigned n_out)
 448 {
 449         struct isl_name **names = NULL;
 450
 451         if (!dim)
 452                 return NULL;
 453         if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
 454                 return dim;
 455
 456         isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
 457         isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
 458         isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
 459
 460         dim = isl_dim_cow(dim);
 461
 462         if (dim->names) {
 463                 names = isl_calloc_array(dim->ctx, struct isl_name *,
 464                                          nparam + n_in + n_out);
 465                 if (!names)
 466                         goto error;
 467                 get_names(dim, isl_dim_param, 0, dim->nparam, names);
 468                 get_names(dim, isl_dim_in, 0, dim->n_in, names + nparam);
 469                 get_names(dim, isl_dim_out, 0, dim->n_out,
 470                                 names + nparam + n_in);
 471                 free(dim->names);
 472                 dim->names = names;
 473                 dim->n_name = nparam + n_in + n_out;
 474         }
 475         dim->nparam = nparam;
 476         dim->n_in = n_in;
 477         dim->n_out = n_out;
 478
 479         return dim;
 480 error:
 481         free(names);
 482         isl_dim_free(dim);
 483         return NULL;
 484 }
 485
 486 struct isl_dim *isl_dim_add(struct isl_dim *dim, enum isl_dim_type type,
 487         unsigned n)
 488 {
 489         if (!dim)
 490                 return NULL;
 491         dim = isl_dim_reset(dim, type);
 492         switch (type) {
 493         case isl_dim_param:
 494                 dim = isl_dim_extend(dim,
 495                                         dim->nparam + n, dim->n_in, dim->n_out);
 496                 if (dim && dim->nested[0] &&
 497                     !(dim->nested[0] = isl_dim_add(dim->nested[0],
 498                                                     isl_dim_param, n)))
 499                         goto error;
 500                 if (dim && dim->nested[1] &&
 501                     !(dim->nested[1] = isl_dim_add(dim->nested[1],
 502                                                     isl_dim_param, n)))
 503                         goto error;
 504                 return dim;
 505         case isl_dim_in:
 506                 return isl_dim_extend(dim,
 507                                         dim->nparam, dim->n_in + n, dim->n_out);
 508         case isl_dim_out:
 509                 return isl_dim_extend(dim,
 510                                         dim->nparam, dim->n_in, dim->n_out + n);
 511         }
 512         return dim;
 513 error:
 514         isl_dim_free(dim);
 515         return NULL;
 516 }
 517
 518 __isl_give isl_dim *isl_dim_insert(__isl_take isl_dim *dim,
 519         enum isl_dim_type type, unsigned pos, unsigned n)
 520 {
 521         struct isl_name **names = NULL;
 522
 523         if (!dim)
 524                 return NULL;
 525         if (n == 0)
 526                 return isl_dim_reset(dim, type);
 527
 528         isl_assert(dim->ctx, pos <= isl_dim_size(dim, type), goto error);
 529
 530         dim = isl_dim_cow(dim);
 531         if (!dim)
 532                 return NULL;
 533
 534         if (dim->names) {
 535                 enum isl_dim_type t;
 536                 int off;
 537                 int s[3];
 538                 int *size = s - isl_dim_param;
 539                 names = isl_calloc_array(dim->ctx, struct isl_name *,
 540                                      dim->nparam + dim->n_in + dim->n_out + n);
 541                 if (!names)
 542                         goto error;
 543                 off = 0;
 544                 size[isl_dim_param] = dim->nparam;
 545                 size[isl_dim_in] = dim->n_in;
 546                 size[isl_dim_out] = dim->n_out;
 547                 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
 548                         if (t != type) {
 549                                 get_names(dim, t, 0, size[t], names + off);
 550                                 off += size[t];
 551                         } else {
 552                                 get_names(dim, t, 0, pos, names + off);
 553                                 off += pos + n;
 554                                 get_names(dim, t, pos, size[t]-pos, names+off);
 555                                 off += size[t] - pos;
 556                         }
 557                 }
 558                 free(dim->names);
 559                 dim->names = names;
 560                 dim->n_name = dim->nparam + dim->n_in + dim->n_out + n;
 561         }
 562         switch (type) {
 563         case isl_dim_param:     dim->nparam += n; break;
 564         case isl_dim_in:        dim->n_in += n; break;
 565         case isl_dim_out:       dim->n_out += n; break;
 566         }
 567         dim = isl_dim_reset(dim, type);
 568
 569         return dim;
 570 error:
 571         isl_dim_free(dim);
 572         return NULL;
 573 }
 574
 575 __isl_give isl_dim *isl_dim_move(__isl_take isl_dim *dim,
 576         enum isl_dim_type dst_type, unsigned dst_pos,
 577         enum isl_dim_type src_type, unsigned src_pos, unsigned n)
 578 {
 579         if (!dim)
 580                 return NULL;
 581         if (n == 0)
 582                 return dim;
 583
 584         isl_assert(dim->ctx, src_pos + n <= isl_dim_size(dim, src_type),
 585                 goto error);
 586
 587         if (dst_type == src_type && dst_pos == src_pos)
 588                 return dim;
 589
 590         isl_assert(dim->ctx, dst_type != src_type, goto error);
 591
 592         dim = isl_dim_reset(dim, src_type);
 593         dim = isl_dim_reset(dim, dst_type);
 594
 595         dim = isl_dim_cow(dim);
 596         if (!dim)
 597                 return NULL;
 598
 599         if (dim->names) {
 600                 struct isl_name **names;
 601                 enum isl_dim_type t;
 602                 int off;
 603                 int s[3];
 604                 int *size = s - isl_dim_param;
 605                 names = isl_calloc_array(dim->ctx, struct isl_name *,
 606                                          dim->nparam + dim->n_in + dim->n_out);
 607                 if (!names)
 608                         goto error;
 609                 off = 0;
 610                 size[isl_dim_param] = dim->nparam;
 611                 size[isl_dim_in] = dim->n_in;
 612                 size[isl_dim_out] = dim->n_out;
 613                 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
 614                         if (t == dst_type) {
 615                                 get_names(dim, t, 0, dst_pos, names + off);
 616                                 off += dst_pos;
 617                                 get_names(dim, src_type, src_pos, n, names+off);
 618                                 off += n;
 619                                 get_names(dim, t, dst_pos, size[t] - dst_pos,
 620                                                 names + off);
 621                                 off += size[t] - dst_pos;
 622                         } else if (t == src_type) {
 623                                 get_names(dim, t, 0, src_pos, names + off);
 624                                 off += src_pos;
 625                                 get_names(dim, t, src_pos + n,
 626                                             size[t] - src_pos - n, names + off);
 627                                 off += size[t] - src_pos - n;
 628                         } else {
 629                                 get_names(dim, t, 0, size[t], names + off);
 630                                 off += size[t];
 631                         }
 632                 }
 633                 free(dim->names);
 634                 dim->names = names;
 635                 dim->n_name = dim->nparam + dim->n_in + dim->n_out;
 636         }
 637
 638         switch (dst_type) {
 639         case isl_dim_param:     dim->nparam += n; break;
 640         case isl_dim_in:        dim->n_in += n; break;
 641         case isl_dim_out:       dim->n_out += n; break;
 642         }
 643
 644         switch (src_type) {
 645         case isl_dim_param:     dim->nparam -= n; break;
 646         case isl_dim_in:        dim->n_in -= n; break;
 647         case isl_dim_out:       dim->n_out -= n; break;
 648         }
 649
 650         return dim;
 651 error:
 652         isl_dim_free(dim);
 653         return NULL;
 654 }
 655
 656 struct isl_dim *isl_dim_join(struct isl_dim *left, struct isl_dim *right)
 657 {
 658         struct isl_dim *dim;
 659
 660         if (!left || !right)
 661                 goto error;
 662
 663         isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
 664                         goto error);
 665         isl_assert(left->ctx,
 666                 isl_dim_tuple_match(left, isl_dim_out, right, isl_dim_in),
 667                 goto error);
 668
 669         dim = isl_dim_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
 670         if (!dim)
 671                 goto error;
 672
 673         dim = copy_names(dim, isl_dim_param, 0, left, isl_dim_param);
 674         dim = copy_names(dim, isl_dim_in, 0, left, isl_dim_in);
 675         dim = copy_names(dim, isl_dim_out, 0, right, isl_dim_out);
 676
 677         if (dim && left->tuple_name[0] &&
 678             !(dim->tuple_name[0] = isl_name_copy(dim->ctx, left->tuple_name[0])))
 679                 goto error;
 680         if (dim && right->tuple_name[1] &&
 681             !(dim->tuple_name[1] = isl_name_copy(dim->ctx, right->tuple_name[1])))
 682                 goto error;
 683         if (dim && left->nested[0] &&
 684             !(dim->nested[0] = isl_dim_copy(left->nested[0])))
 685                 goto error;
 686         if (dim && right->nested[1] &&
 687             !(dim->nested[1] = isl_dim_copy(right->nested[1])))
 688                 goto error;
 689
 690         isl_dim_free(left);
 691         isl_dim_free(right);
 692
 693         return dim;
 694 error:
 695         isl_dim_free(left);
 696         isl_dim_free(right);
 697         return NULL;
 698 }
 699
 700 struct isl_dim *isl_dim_product(struct isl_dim *left, struct isl_dim *right)
 701 {
 702         isl_dim *dom1, *dom2, *nest1, *nest2;
 703
 704         if (!left || !right)
 705                 goto error;
 706
 707         isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
 708                         goto error);
 709
 710         dom1 = isl_dim_domain(isl_dim_copy(left));
 711         dom2 = isl_dim_domain(isl_dim_copy(right));
 712         nest1 = isl_dim_wrap(isl_dim_join(isl_dim_reverse(dom1), dom2));
 713
 714         dom1 = isl_dim_range(left);
 715         dom2 = isl_dim_range(right);
 716         nest2 = isl_dim_wrap(isl_dim_join(isl_dim_reverse(dom1), dom2));
 717
 718         return isl_dim_join(isl_dim_reverse(nest1), nest2);
 719 error:
 720         isl_dim_free(left);
 721         isl_dim_free(right);
 722         return NULL;
 723 }
 724
 725 struct isl_dim *isl_dim_map(struct isl_dim *dim)
 726 {
 727         struct isl_name **names = NULL;
 728
 729         if (!dim)
 730                 return NULL;
 731         isl_assert(dim->ctx, dim->n_in == 0, goto error);
 732         if (dim->n_out == 0 && !isl_dim_is_named_or_nested(dim, isl_dim_out))
 733                 return dim;
 734         dim = isl_dim_cow(dim);
 735         if (!dim)
 736                 return NULL;
 737         if (dim->names) {
 738                 names = isl_calloc_array(dim->ctx, struct isl_name *,
 739                                         dim->nparam + dim->n_out + dim->n_out);
 740                 if (!names)
 741                         goto error;
 742                 get_names(dim, isl_dim_param, 0, dim->nparam, names);
 743                 get_names(dim, isl_dim_out, 0, dim->n_out, names + dim->nparam);
 744         }
 745         dim->n_in = dim->n_out;
 746         if (names) {
 747                 free(dim->names);
 748                 dim->names = names;
 749                 dim->n_name = dim->nparam + dim->n_out + dim->n_out;
 750                 dim = copy_names(dim, isl_dim_out, 0, dim, isl_dim_in);
 751         }
 752         isl_name_free(dim->ctx, dim->tuple_name[0]);
 753         dim->tuple_name[0] = isl_name_copy(dim->ctx, dim->tuple_name[1]);
 754         isl_dim_free(dim->nested[0]);
 755         dim->nested[0] = isl_dim_copy(dim->nested[1]);
 756         return dim;
 757 error:
 758         isl_dim_free(dim);
 759         return NULL;
 760 }
 761
 762 static struct isl_dim *set_names(struct isl_dim *dim, enum isl_dim_type type,
 763         unsigned first, unsigned n, struct isl_name **names)
 764 {
 765         int i;
 766
 767         for (i = 0; i < n ; ++i)
 768                 dim = set_name(dim, type, first+i, names[i]);
 769
 770         return dim;
 771 }
 772
 773 struct isl_dim *isl_dim_reverse(struct isl_dim *dim)
 774 {
 775         unsigned t;
 776         isl_dim *nested;
 777         struct isl_name **names = NULL;
 778         struct isl_name *name;
 779
 780         if (!dim)
 781                 return NULL;
 782         if (match(dim, isl_dim_in, dim, isl_dim_out))
 783                 return dim;
 784
 785         dim = isl_dim_cow(dim);
 786         if (!dim)
 787                 return NULL;
 788
 789         name = dim->tuple_name[0];
 790         dim->tuple_name[0] = dim->tuple_name[1];
 791         dim->tuple_name[1] = name;
 792
 793         nested = dim->nested[0];
 794         dim->nested[0] = dim->nested[1];
 795         dim->nested[1] = nested;
 796
 797         if (dim->names) {
 798                 names = isl_alloc_array(dim->ctx, struct isl_name *,
 799                                         dim->n_in + dim->n_out);
 800                 if (!names)
 801                         goto error;
 802                 get_names(dim, isl_dim_in, 0, dim->n_in, names);
 803                 get_names(dim, isl_dim_out, 0, dim->n_out, names + dim->n_in);
 804         }
 805
 806         t = dim->n_in;
 807         dim->n_in = dim->n_out;
 808         dim->n_out = t;
 809
 810         if (dim->names) {
 811                 dim = set_names(dim, isl_dim_out, 0, dim->n_out, names);
 812                 dim = set_names(dim, isl_dim_in, 0, dim->n_in, names + dim->n_out);
 813                 free(names);
 814         }
 815
 816         return dim;
 817 error:
 818         free(names);
 819         isl_dim_free(dim);
 820         return NULL;
 821 }
 822
 823 struct isl_dim *isl_dim_drop(struct isl_dim *dim, enum isl_dim_type type,
 824                 unsigned first, unsigned num)
 825 {
 826         int i;
 827
 828         if (!dim)
 829                 return NULL;
 830
 831         if (n == 0)
 832                 return isl_dim_reset(dim, type);
 833
 834         isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
 835         dim = isl_dim_cow(dim);
 836         if (!dim)
 837                 goto error;
 838         if (dim->names) {
 839                 dim = extend_names(dim);
 840                 if (!dim)
 841                         goto error;
 842                 for (i = 0; i < num; ++i)
 843                         isl_name_free(dim->ctx, get_name(dim, type, first+i));
 844                 for (i = first+num; i < n(dim, type); ++i)
 845                         set_name(dim, type, i - num, get_name(dim, type, i));
 846                 switch (type) {
 847                 case isl_dim_param:
 848                         get_names(dim, isl_dim_in, 0, dim->n_in,
 849                                 dim->names + offset(dim, isl_dim_in) - num);
 850                 case isl_dim_in:
 851                         get_names(dim, isl_dim_out, 0, dim->n_out,
 852                                 dim->names + offset(dim, isl_dim_out) - num);
 853                 case isl_dim_out:
 854                         ;
 855                 }
 856                 dim->n_name -= num;
 857         }
 858         switch (type) {
 859         case isl_dim_param:     dim->nparam -= num; break;
 860         case isl_dim_in:        dim->n_in -= num; break;
 861         case isl_dim_out:       dim->n_out -= num; break;
 862         }
 863         dim = isl_dim_reset(dim, type);
 864         if (type == isl_dim_param) {
 865                 if (dim && dim->nested[0] &&
 866                     !(dim->nested[0] = isl_dim_drop(dim->nested[0],
 867                                                     isl_dim_param, first, num)))
 868                         goto error;
 869                 if (dim && dim->nested[1] &&
 870                     !(dim->nested[1] = isl_dim_drop(dim->nested[1],
 871                                                     isl_dim_param, first, num)))
 872                         goto error;
 873         }
 874         return dim;
 875 error:
 876         isl_dim_free(dim);
 877         return NULL;
 878 }
 879
 880 struct isl_dim *isl_dim_drop_inputs(struct isl_dim *dim,
 881                 unsigned first, unsigned n)
 882 {
 883         if (!dim)
 884                 return NULL;
 885         return isl_dim_drop(dim, isl_dim_in, first, n);
 886 }
 887
 888 struct isl_dim *isl_dim_drop_outputs(struct isl_dim *dim,
 889                 unsigned first, unsigned n)
 890 {
 891         if (!dim)
 892                 return NULL;
 893         return isl_dim_drop(dim, isl_dim_out, first, n);
 894 }
 895
 896 struct isl_dim *isl_dim_domain(struct isl_dim *dim)
 897 {
 898         if (!dim)
 899                 return NULL;
 900         dim = isl_dim_drop_outputs(dim, 0, dim->n_out);
 901         return isl_dim_reverse(dim);
 902 }
 903
 904 __isl_give isl_dim *isl_dim_from_domain(__isl_take isl_dim *dim)
 905 {
 906         return isl_dim_reverse(dim);
 907 }
 908
 909 struct isl_dim *isl_dim_range(struct isl_dim *dim)
 910 {
 911         if (!dim)
 912                 return NULL;
 913         return isl_dim_drop_inputs(dim, 0, dim->n_in);
 914 }
 915
 916 __isl_give isl_dim *isl_dim_from_range(__isl_take isl_dim *dim)
 917 {
 918         return dim;
 919 }
 920
 921 __isl_give isl_dim *isl_dim_as_set_dim(__isl_take isl_dim *dim)
 922 {
 923         dim = isl_dim_cow(dim);
 924         if (!dim)
 925                 return NULL;
 926
 927         dim->n_out += dim->n_in;
 928         dim->n_in = 0;
 929         dim = isl_dim_reset(dim, isl_dim_in);
 930         dim = isl_dim_reset(dim, isl_dim_out);
 931
 932         return dim;
 933 }
 934
 935 struct isl_dim *isl_dim_underlying(struct isl_dim *dim, unsigned n_div)
 936 {
 937         int i;
 938
 939         if (!dim)
 940                 return NULL;
 941         if (n_div == 0 &&
 942             dim->nparam == 0 && dim->n_in == 0 && dim->n_name == 0)
 943                 return isl_dim_reset(isl_dim_reset(dim, isl_dim_in), isl_dim_out);
 944         dim = isl_dim_cow(dim);
 945         if (!dim)
 946                 return NULL;
 947         dim->n_out += dim->nparam + dim->n_in + n_div;
 948         dim->nparam = 0;
 949         dim->n_in = 0;
 950
 951         for (i = 0; i < dim->n_name; ++i)
 952                 isl_name_free(dim->ctx, get_name(dim, isl_dim_out, i));
 953         dim->n_name = 0;
 954         dim = isl_dim_reset(dim, isl_dim_in);
 955         dim = isl_dim_reset(dim, isl_dim_out);
 956
 957         return dim;
 958 }
 959
 960 unsigned isl_dim_total(struct isl_dim *dim)
 961 {
 962         return dim ? dim->nparam + dim->n_in + dim->n_out : 0;
 963 }
 964
 965 int isl_dim_equal(struct isl_dim *dim1, struct isl_dim *dim2)
 966 {
 967         return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
 968                isl_dim_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
 969                isl_dim_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
 970 }
 971
 972 int isl_dim_compatible(struct isl_dim *dim1, struct isl_dim *dim2)
 973 {
 974         return dim1->nparam == dim2->nparam &&
 975                dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
 976 }
 977
 978 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_dim *dim)
 979 {
 980         int i;
 981         struct isl_name *name;
 982
 983         if (!dim)
 984                 return hash;
 985
 986         hash = isl_hash_builtin(hash, dim->nparam);
 987         hash = isl_hash_builtin(hash, dim->n_in);
 988         hash = isl_hash_builtin(hash, dim->n_out);
 989
 990         for (i = 0; i < dim->nparam; ++i) {
 991                 name = get_name(dim, isl_dim_param, i);
 992                 hash = isl_hash_name(hash, name);
 993         }
 994
 995         name = tuple_name(dim, isl_dim_in);
 996         hash = isl_hash_name(hash, name);
 997         name = tuple_name(dim, isl_dim_out);
 998         hash = isl_hash_name(hash, name);
 999
1000         hash = isl_hash_dim(hash, dim->nested[0]);
1001         hash = isl_hash_dim(hash, dim->nested[1]);
1002
1003         return hash;
1004 }
1005
1006 uint32_t isl_dim_get_hash(__isl_keep isl_dim *dim)
1007 {
1008         uint32_t hash;
1009
1010         if (!dim)
1011                 return 0;
1012
1013         hash = isl_hash_init();
1014         hash = isl_hash_dim(hash, dim);
1015
1016         return hash;
1017 }
1018
1019 int isl_dim_is_wrapping(__isl_keep isl_dim *dim)
1020 {
1021         if (!dim)
1022                 return -1;
1023
1024         if (dim->n_in != 0 || dim->tuple_name[0] || dim->nested[0])
1025                 return 0;
1026
1027         return dim->nested[1] != NULL;
1028 }
1029
1030 __isl_give isl_dim *isl_dim_wrap(__isl_take isl_dim *dim)
1031 {
1032         isl_dim *wrap;
1033
1034         if (!dim)
1035                 return NULL;
1036
1037         wrap = isl_dim_alloc(dim->ctx, dim->nparam, 0, dim->n_in + dim->n_out);
1038
1039         wrap = copy_names(wrap, isl_dim_param, 0, dim, isl_dim_param);
1040         wrap = copy_names(wrap, isl_dim_set, 0, dim, isl_dim_in);
1041         wrap = copy_names(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1042
1043         if (!wrap)
1044                 goto error;
1045
1046         wrap->nested[1] = dim;
1047
1048         return wrap;
1049 error:
1050         isl_dim_free(dim);
1051         return NULL;
1052 }
1053
1054 __isl_give isl_dim *isl_dim_unwrap(__isl_take isl_dim *dim)
1055 {
1056         isl_dim *unwrap;
1057
1058         if (!dim)
1059                 return NULL;
1060
1061         if (!isl_dim_is_wrapping(dim))
1062                 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1063                         goto error);
1064
1065         unwrap = isl_dim_copy(dim->nested[1]);
1066         isl_dim_free(dim);
1067
1068         return unwrap;
1069 error:
1070         isl_dim_free(dim);
1071         return NULL;
1072 }
1073
1074 int isl_dim_is_named_or_nested(__isl_keep isl_dim *dim, enum isl_dim_type type)
1075 {
1076         if (type != isl_dim_in && type != isl_dim_out)
1077                 return 0;
1078         if (!dim)
1079                 return -1;
1080         if (dim->tuple_name[type - isl_dim_in])
1081                 return 1;
1082         if (dim->nested[type - isl_dim_in])
1083                 return 1;
1084         return 0;
1085 }
1086
1087 __isl_give isl_dim *isl_dim_reset(__isl_take isl_dim *dim,
1088         enum isl_dim_type type)
1089 {
1090         if (!isl_dim_is_named_or_nested(dim, type))
1091                 return dim;
1092
1093         dim = isl_dim_cow(dim);
1094         if (!dim)
1095                 return NULL;
1096
1097         isl_name_free(dim->ctx, dim->tuple_name[type - isl_dim_in]);
1098         dim->tuple_name[type - isl_dim_in] = NULL;
1099         isl_dim_free(dim->nested[type - isl_dim_in]);
1100         dim->nested[type - isl_dim_in] = NULL;
1101
1102         return dim;
1103 }
1104
1105 __isl_give isl_dim *isl_dim_flatten(__isl_take isl_dim *dim)
1106 {
1107         if (!dim)
1108                 return NULL;
1109         if (!dim->nested[0] && !dim->nested[1])
1110                 return dim;
1111
1112         if (dim->nested[0])
1113                 dim = isl_dim_reset(dim, isl_dim_in);
1114         if (dim && dim->nested[1])
1115                 dim = isl_dim_reset(dim, isl_dim_out);
1116
1117         return dim;
1118 }
1119
1120 /* Replace the dimensions of the given type of dst by those of src.
1121  */
1122 __isl_give isl_dim *isl_dim_replace(__isl_take isl_dim *dst,
1123         enum isl_dim_type type, __isl_keep isl_dim *src)
1124 {
1125         dst = isl_dim_cow(dst);
1126
1127         if (!dst || !src)
1128                 goto error;
1129
1130         dst = isl_dim_drop(dst, type, 0, isl_dim_size(dst, type));
1131         dst = isl_dim_add(dst, type, isl_dim_size(src, type));
1132         dst = copy_names(dst, type, 0, src, type);
1133
1134         if (dst && type == isl_dim_param) {
1135                 int i;
1136                 for (i = 0; i <= 1; ++i) {
1137                         if (!dst->nested[i])
1138                                 continue;
1139                         dst->nested[i] = isl_dim_replace(dst->nested[i],
1140                                                          type, src);
1141                         if (!dst->nested[i])
1142                                 goto error;
1143                 }
1144         }
1145
1146         return dst;
1147 error:
1148         isl_dim_free(dst);
1149         return NULL;
1150 }