isl_pw_templ.c

   1 #define xFN(TYPE,NAME) TYPE ## _ ## NAME
   2 #define FN(TYPE,NAME) xFN(TYPE,NAME)
   3 #define xS(TYPE,NAME) struct TYPE ## _ ## NAME
   4 #define S(TYPE,NAME) xS(TYPE,NAME)
   5
   6 #ifdef HAS_TYPE
   7 static __isl_give PW *FN(PW,alloc_)(__isl_take isl_dim *dim,
   8         enum isl_fold type, int n)
   9 #else
  10 static __isl_give PW *FN(PW,alloc_)(__isl_take isl_dim *dim, int n)
  11 #endif
  12 {
  13         struct PW *pw;
  14
  15         if (!dim)
  16                 return NULL;
  17         isl_assert(dim->ctx, n >= 0, goto error);
  18         pw = isl_alloc(dim->ctx, struct PW,
  19                         sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
  20         if (!pw)
  21                 goto error;
  22
  23         pw->ref = 1;
  24 #ifdef HAS_TYPE
  25         pw->type = type;
  26 #endif
  27         pw->size = n;
  28         pw->n = 0;
  29         pw->dim = dim;
  30         return pw;
  31 error:
  32         isl_dim_free(dim);
  33         return NULL;
  34 }
  35
  36 #ifdef HAS_TYPE
  37 __isl_give PW *FN(PW,zero)(__isl_take isl_dim *dim, enum isl_fold type)
  38 {
  39         return FN(PW,alloc_)(dim, type, 0);
  40 }
  41 #else
  42 __isl_give PW *FN(PW,zero)(__isl_take isl_dim *dim)
  43 {
  44         return FN(PW,alloc_)(dim, 0);
  45 }
  46 #endif
  47
  48 __isl_give PW *FN(PW,add_piece)(__isl_take PW *pw,
  49         __isl_take isl_set *set, __isl_take EL *el)
  50 {
  51         if (!pw || !set || !el)
  52                 goto error;
  53
  54         if (isl_set_fast_is_empty(set) || FN(EL,IS_ZERO)(el)) {
  55                 isl_set_free(set);
  56                 FN(EL,free)(el);
  57                 return pw;
  58         }
  59
  60 #ifdef HAS_TYPE
  61         if (pw->type != el->type)
  62                 isl_die(set->ctx, isl_error_invalid, "fold types don't match",
  63                         goto error);
  64 #endif
  65         isl_assert(set->ctx, isl_dim_equal(pw->dim, el->dim), goto error);
  66         isl_assert(set->ctx, pw->n < pw->size, goto error);
  67
  68         pw->p[pw->n].set = set;
  69         pw->p[pw->n].FIELD = el;
  70         pw->n++;
  71
  72         return pw;
  73 error:
  74         FN(PW,free)(pw);
  75         isl_set_free(set);
  76         FN(EL,free)(el);
  77         return NULL;
  78 }
  79
  80 #ifdef HAS_TYPE
  81 __isl_give PW *FN(PW,alloc)(enum isl_fold type,
  82         __isl_take isl_set *set, __isl_take EL *el)
  83 #else
  84 __isl_give PW *FN(PW,alloc)(__isl_take isl_set *set, __isl_take EL *el)
  85 #endif
  86 {
  87         PW *pw;
  88
  89         if (!set || !el)
  90                 goto error;
  91
  92 #ifdef HAS_TYPE
  93         pw = FN(PW,alloc_)(isl_set_get_dim(set), type, 1);
  94 #else
  95         pw = FN(PW,alloc_)(isl_set_get_dim(set), 1);
  96 #endif
  97
  98         return FN(PW,add_piece)(pw, set, el);
  99 error:
 100         isl_set_free(set);
 101         FN(EL,free)(el);
 102         return NULL;
 103 }
 104
 105 __isl_give PW *FN(PW,dup)(__isl_keep PW *pw)
 106 {
 107         int i;
 108         PW *dup;
 109
 110         if (!pw)
 111                 return NULL;
 112
 113 #ifdef HAS_TYPE
 114         dup = FN(PW,alloc_)(isl_dim_copy(pw->dim), pw->type, pw->n);
 115 #else
 116         dup = FN(PW,alloc_)(isl_dim_copy(pw->dim), pw->n);
 117 #endif
 118         if (!dup)
 119                 return NULL;
 120
 121         for (i = 0; i < pw->n; ++i)
 122                 dup = FN(PW,add_piece)(dup, isl_set_copy(pw->p[i].set),
 123                                             FN(EL,copy)(pw->p[i].FIELD));
 124
 125         return dup;
 126 error:
 127         FN(PW,free)(dup);
 128         return NULL;
 129 }
 130
 131 __isl_give PW *FN(PW,cow)(__isl_take PW *pw)
 132 {
 133         if (!pw)
 134                 return NULL;
 135
 136         if (pw->ref == 1)
 137                 return pw;
 138         pw->ref--;
 139         return FN(PW,dup)(pw);
 140 }
 141
 142 __isl_give PW *FN(PW,copy)(__isl_keep PW *pw)
 143 {
 144         if (!pw)
 145                 return NULL;
 146
 147         pw->ref++;
 148         return pw;
 149 }
 150
 151 void FN(PW,free)(__isl_take PW *pw)
 152 {
 153         int i;
 154
 155         if (!pw)
 156                 return;
 157         if (--pw->ref > 0)
 158                 return;
 159
 160         for (i = 0; i < pw->n; ++i) {
 161                 isl_set_free(pw->p[i].set);
 162                 FN(EL,free)(pw->p[i].FIELD);
 163         }
 164         isl_dim_free(pw->dim);
 165         free(pw);
 166 }
 167
 168 int FN(PW,is_zero)(__isl_keep PW *pw)
 169 {
 170         if (!pw)
 171                 return -1;
 172
 173         return pw->n == 0;
 174 }
 175
 176 __isl_give PW *FN(PW,add)(__isl_take PW *pw1, __isl_take PW *pw2)
 177 {
 178         int i, j, n;
 179         struct PW *res;
 180         isl_set *set;
 181
 182         if (!pw1 || !pw2)
 183                 goto error;
 184
 185 #ifdef HAS_TYPE
 186         if (pw1->type != pw2->type)
 187                 isl_die(pw1->dim->ctx, isl_error_invalid,
 188                         "fold types don't match", goto error);
 189 #endif
 190         isl_assert(pw1->dim->ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
 191
 192         if (FN(PW,is_zero)(pw1)) {
 193                 FN(PW,free)(pw1);
 194                 return pw2;
 195         }
 196
 197         if (FN(PW,is_zero)(pw2)) {
 198                 FN(PW,free)(pw2);
 199                 return pw1;
 200         }
 201
 202         n = (pw1->n + 1) * (pw2->n + 1);
 203 #ifdef HAS_TYPE
 204         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->type, n);
 205 #else
 206         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), n);
 207 #endif
 208
 209         for (i = 0; i < pw1->n; ++i) {
 210                 set = isl_set_copy(pw1->p[i].set);
 211                 for (j = 0; j < pw2->n; ++j) {
 212                         struct isl_set *common;
 213                         EL *sum;
 214                         set = isl_set_subtract(set,
 215                                         isl_set_copy(pw2->p[j].set));
 216                         common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
 217                                                 isl_set_copy(pw2->p[j].set));
 218                         if (isl_set_fast_is_empty(common)) {
 219                                 isl_set_free(common);
 220                                 continue;
 221                         }
 222
 223                         sum = FN(EL,add_on_domain)(common,
 224                                                    FN(EL,copy)(pw1->p[i].FIELD),
 225                                                    FN(EL,copy)(pw2->p[j].FIELD));
 226
 227                         res = FN(PW,add_piece)(res, common, sum);
 228                 }
 229                 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw1->p[i].FIELD));
 230         }
 231
 232         for (j = 0; j < pw2->n; ++j) {
 233                 set = isl_set_copy(pw2->p[j].set);
 234                 for (i = 0; i < pw1->n; ++i)
 235                         set = isl_set_subtract(set,
 236                                         isl_set_copy(pw1->p[i].set));
 237                 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw2->p[j].FIELD));
 238         }
 239
 240         FN(PW,free)(pw1);
 241         FN(PW,free)(pw2);
 242
 243         return res;
 244 error:
 245         FN(PW,free)(pw1);
 246         FN(PW,free)(pw2);
 247         return NULL;
 248 }
 249
 250 __isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
 251 {
 252         int i;
 253         PW *res;
 254
 255         if (!pw1 || !pw2)
 256                 goto error;
 257
 258 #ifdef HAS_TYPE
 259         if (pw1->type != pw2->type)
 260                 isl_die(pw1->dim->ctx, isl_error_invalid,
 261                         "fold types don't match", goto error);
 262 #endif
 263         isl_assert(pw1->dim->ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
 264
 265         if (FN(PW,is_zero)(pw1)) {
 266                 FN(PW,free)(pw1);
 267                 return pw2;
 268         }
 269
 270         if (FN(PW,is_zero)(pw2)) {
 271                 FN(PW,free)(pw2);
 272                 return pw1;
 273         }
 274
 275 #ifdef HAS_TYPE
 276         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->type, pw1->n + pw2->n);
 277 #else
 278         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->n + pw2->n);
 279 #endif
 280
 281         for (i = 0; i < pw1->n; ++i)
 282                 res = FN(PW,add_piece)(res,
 283                                 isl_set_copy(pw1->p[i].set),
 284                                 FN(EL,copy)(pw1->p[i].FIELD));
 285
 286         for (i = 0; i < pw2->n; ++i)
 287                 res = FN(PW,add_piece)(res,
 288                                 isl_set_copy(pw2->p[i].set),
 289                                 FN(EL,copy)(pw2->p[i].FIELD));
 290
 291         FN(PW,free)(pw1);
 292         FN(PW,free)(pw2);
 293
 294         return res;
 295 error:
 296         FN(PW,free)(pw1);
 297         FN(PW,free)(pw2);
 298         return NULL;
 299 }
 300
 301 __isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
 302         __isl_take isl_point *pnt)
 303 {
 304         int i;
 305         int found = 0;
 306         isl_qpolynomial *qp;
 307
 308         if (!pw || !pnt)
 309                 goto error;
 310         isl_assert(pnt->dim->ctx, isl_dim_equal(pnt->dim, pw->dim), goto error);
 311
 312         for (i = 0; i < pw->n; ++i) {
 313                 found = isl_set_contains_point(pw->p[i].set, pnt);
 314                 if (found < 0)
 315                         goto error;
 316                 if (found)
 317                         break;
 318         }
 319         if (found)
 320                 qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
 321                                             isl_point_copy(pnt));
 322         else
 323                 qp = isl_qpolynomial_zero(isl_dim_copy(pw->dim));
 324         FN(PW,free)(pw);
 325         isl_point_free(pnt);
 326         return qp;
 327 error:
 328         FN(PW,free)(pw);
 329         isl_point_free(pnt);
 330         return NULL;
 331 }
 332
 333 __isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
 334 {
 335         int i;
 336         isl_set *dom;
 337
 338         if (!pw)
 339                 return NULL;
 340
 341         dom = isl_set_empty(isl_dim_copy(pw->dim));
 342         for (i = 0; i < pw->n; ++i)
 343                 dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
 344
 345         FN(PW,free)(pw);
 346
 347         return dom;
 348 }
 349
 350 __isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw, __isl_take isl_set *set)
 351 {
 352         int i;
 353
 354         if (!pw || !set)
 355                 goto error;
 356
 357         if (pw->n == 0) {
 358                 isl_set_free(set);
 359                 return pw;
 360         }
 361
 362         pw = FN(PW,cow)(pw);
 363         if (!pw)
 364                 goto error;
 365
 366         for (i = pw->n - 1; i >= 0; --i) {
 367                 isl_basic_set *aff;
 368                 pw->p[i].set = isl_set_intersect(pw->p[i].set, isl_set_copy(set));
 369                 if (!pw->p[i].set)
 370                         goto error;
 371                 aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
 372                 pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
 373                                                                 aff);
 374                 if (isl_set_fast_is_empty(pw->p[i].set)) {
 375                         isl_set_free(pw->p[i].set);
 376                         FN(EL,free)(pw->p[i].FIELD);
 377                         if (i != pw->n - 1)
 378                                 pw->p[i] = pw->p[pw->n - 1];
 379                         pw->n--;
 380                 }
 381         }
 382
 383         isl_set_free(set);
 384         return pw;
 385 error:
 386         isl_set_free(set);
 387         FN(PW,free)(pw);
 388         return NULL;
 389 }
 390
 391 __isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
 392 {
 393         int i;
 394         isl_basic_set *hull = NULL;
 395
 396         if (!pw || !context)
 397                 goto error;
 398
 399         if (pw->n == 0) {
 400                 isl_set_free(context);
 401                 return pw;
 402         }
 403
 404         context = isl_set_compute_divs(context);
 405         hull = isl_set_simple_hull(isl_set_copy(context));
 406
 407         pw = FN(PW,cow)(pw);
 408         if (!pw)
 409                 goto error;
 410
 411         for (i = pw->n - 1; i >= 0; --i) {
 412                 pw->p[i].set = isl_set_gist_basic_set(pw->p[i].set,
 413                                                 isl_basic_set_copy(hull));
 414                 if (!pw->p[i].set)
 415                         goto error;
 416                 if (isl_set_fast_is_empty(pw->p[i].set)) {
 417                         isl_set_free(pw->p[i].set);
 418                         FN(EL,free)(pw->p[i].FIELD);
 419                         if (i != pw->n - 1)
 420                                 pw->p[i] = pw->p[pw->n - 1];
 421                         pw->n--;
 422                 }
 423         }
 424
 425         isl_basic_set_free(hull);
 426         isl_set_free(context);
 427
 428         return pw;
 429 error:
 430         FN(PW,free)(pw);
 431         isl_basic_set_free(hull);
 432         isl_set_free(context);
 433         return NULL;
 434 }
 435
 436 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
 437 {
 438         int i, j;
 439
 440         if (!pw)
 441                 return NULL;
 442         if (pw->n == 0)
 443                 return pw;
 444
 445         for (i = pw->n - 1; i >= 0; --i) {
 446                 for (j = i - 1; j >= 0; --j) {
 447                         if (!FN(EL,is_equal)(pw->p[i].FIELD, pw->p[j].FIELD))
 448                                 continue;
 449                         pw->p[j].set = isl_set_union(pw->p[j].set,
 450                                                         pw->p[i].set);
 451                         FN(EL,free)(pw->p[i].FIELD);
 452                         if (i != pw->n - 1)
 453                                 pw->p[i] = pw->p[pw->n - 1];
 454                         pw->n--;
 455                         break;
 456                 }
 457                 if (j >= 0)
 458                         continue;
 459                 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
 460                 if (!pw->p[i].set)
 461                         goto error;
 462         }
 463
 464         return pw;
 465 error:
 466         FN(PW,free)(pw);
 467         return NULL;
 468 }
 469
 470 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
 471 {
 472         return pw ? pw->dim->ctx : NULL;
 473 }
 474
 475 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
 476         unsigned first, unsigned n)
 477 {
 478         int i;
 479
 480         if (!pw)
 481                 return -1;
 482         if (pw->n == 0 || n == 0)
 483                 return 0;
 484         for (i = 0; i < pw->n; ++i) {
 485                 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
 486                                                         type, first, n);
 487                 if (involves < 0 || involves)
 488                         return involves;
 489         }
 490         return 0;
 491 }
 492
 493 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
 494         enum isl_dim_type type, unsigned pos, const char *s)
 495 {
 496         int i;
 497
 498         pw = FN(PW,cow)(pw);
 499         if (!pw)
 500                 return NULL;
 501
 502         pw->dim = isl_dim_set_name(pw->dim, type, pos, s);
 503         if (!pw->dim)
 504                 goto error;
 505
 506         for (i = 0; i < pw->n; ++i) {
 507                 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set, type, pos, s);
 508                 if (!pw->p[i].set)
 509                         goto error;
 510                 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
 511                 if (!pw->p[i].FIELD)
 512                         goto error;
 513         }
 514
 515         return pw;
 516 error:
 517         FN(PW,free)(pw);
 518         return NULL;
 519 }
 520
 521 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
 522         enum isl_dim_type type, unsigned first, unsigned n)
 523 {
 524         int i;
 525
 526         if (!pw)
 527                 return NULL;
 528         if (n == 0 && !isl_dim_get_tuple_name(pw->dim, type))
 529                 return pw;
 530
 531         pw = FN(PW,cow)(pw);
 532         if (!pw)
 533                 return NULL;
 534         pw->dim = isl_dim_drop(pw->dim, type, first, n);
 535         if (!pw->dim)
 536                 goto error;
 537         for (i = 0; i < pw->n; ++i) {
 538                 pw->p[i].set = isl_set_drop(pw->p[i].set, type, first, n);
 539                 if (!pw->p[i].set)
 540                         goto error;
 541                 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
 542                 if (!pw->p[i].FIELD)
 543                         goto error;
 544         }
 545
 546         return pw;
 547 error:
 548         FN(PW,free)(pw);
 549         return NULL;
 550 }
 551
 552 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
 553         unsigned first, unsigned n)
 554 {
 555         int i;
 556
 557         if (!pw)
 558                 return NULL;
 559         if (n == 0 && !isl_dim_is_named_or_nested(pw->dim, type))
 560                 return pw;
 561
 562         pw = FN(PW,cow)(pw);
 563         if (!pw)
 564                 return NULL;
 565
 566         pw->dim = isl_dim_insert(pw->dim, type, first, n);
 567         if (!pw->dim)
 568                 goto error;
 569
 570         for (i = 0; i < pw->n; ++i) {
 571                 pw->p[i].set = isl_set_insert(pw->p[i].set, type, first, n);
 572                 if (!pw->p[i].set)
 573                         goto error;
 574                 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
 575                                                                 type, first, n);
 576                 if (!pw->p[i].FIELD)
 577                         goto error;
 578         }
 579
 580         return pw;
 581 error:
 582         FN(PW,free)(pw);
 583         return NULL;
 584 }
 585
 586 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
 587         enum isl_dim_type type, unsigned pos, isl_int v)
 588 {
 589         int i;
 590
 591         if (!pw)
 592                 return NULL;
 593
 594         pw = FN(PW,cow)(pw);
 595         if (!pw)
 596                 return NULL;
 597         for (i = 0; i < pw->n; ++i) {
 598                 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
 599                 if (!pw->p[i].set)
 600                         goto error;
 601         }
 602
 603         return pw;
 604 error:
 605         FN(PW,free)(pw);
 606         return NULL;
 607 }
 608
 609 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
 610 {
 611         return pw ? isl_dim_size(pw->dim, type) : 0;
 612 }
 613
 614 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
 615         enum isl_dim_type type, unsigned first, unsigned n)
 616 {
 617         int i;
 618
 619         if (!pw)
 620                 return NULL;
 621         if (n == 0)
 622                 return pw;
 623
 624         pw = FN(PW,cow)(pw);
 625         if (!pw)
 626                 return NULL;
 627         if (!pw->dim)
 628                 goto error;
 629         for (i = 0; i < pw->n; ++i) {
 630                 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
 631                 if (!pw->p[i].set)
 632                         goto error;
 633         }
 634
 635         return pw;
 636 error:
 637         FN(PW,free)(pw);
 638         return NULL;
 639 }
 640
 641 /* Compute the maximal value attained by the piecewise quasipolynomial
 642  * on its domain or zero if the domain is empty.
 643  * In the worst case, the domain is scanned completely,
 644  * so the domain is assumed to be bounded.
 645  */
 646 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
 647 {
 648         int i;
 649         isl_qpolynomial *opt;
 650
 651         if (!pw)
 652                 return NULL;
 653
 654         if (pw->n == 0) {
 655                 isl_dim *dim = isl_dim_copy(pw->dim);
 656                 FN(PW,free)(pw);
 657                 return isl_qpolynomial_zero(dim);
 658         }
 659
 660         opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
 661                                         isl_set_copy(pw->p[0].set), max);
 662         for (i = 1; i < pw->n; ++i) {
 663                 isl_qpolynomial *opt_i;
 664                 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
 665                                                 isl_set_copy(pw->p[i].set), max);
 666                 if (max)
 667                         opt = isl_qpolynomial_max_cst(opt, opt_i);
 668                 else
 669                         opt = isl_qpolynomial_min_cst(opt, opt_i);
 670         }
 671
 672         FN(PW,free)(pw);
 673         return opt;
 674 }
 675
 676 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
 677 {
 678         return FN(PW,opt)(pw, 1);
 679 }
 680
 681 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
 682 {
 683         return FN(PW,opt)(pw, 0);
 684 }
 685
 686 __isl_give isl_dim *FN(PW,get_dim)(__isl_keep PW *pw)
 687 {
 688         return pw ? isl_dim_copy(pw->dim) : NULL;
 689 }
 690
 691 __isl_give PW *FN(PW,reset_dim)(__isl_take PW *pw, __isl_take isl_dim *dim)
 692 {
 693         int i;
 694
 695         pw = FN(PW,cow)(pw);
 696         if (!pw || !dim)
 697                 goto error;
 698
 699         for (i = 0; i < pw->n; ++i) {
 700                 pw->p[i].set = isl_set_reset_dim(pw->p[i].set,
 701                                                  isl_dim_copy(dim));
 702                 if (!pw->p[i].set)
 703                         goto error;
 704                 pw->p[i].FIELD = FN(EL,reset_dim)(pw->p[i].FIELD,
 705                                                   isl_dim_copy(dim));
 706                 if (!pw->p[i].FIELD)
 707                         goto error;
 708         }
 709         isl_dim_free(pw->dim);
 710         pw->dim = dim;
 711
 712         return pw;
 713 error:
 714         isl_dim_free(dim);
 715         FN(PW,free)(pw);
 716         return NULL;
 717 }
 718
 719 int FN(PW,has_equal_dim)(__isl_keep PW *pw1, __isl_keep PW *pw2)
 720 {
 721         if (!pw1 || !pw2)
 722                 return -1;
 723
 724         return isl_dim_equal(pw1->dim, pw2->dim);
 725 }
 726
 727 __isl_give PW *FN(PW,morph)(__isl_take PW *pw, __isl_take isl_morph *morph)
 728 {
 729         int i;
 730
 731         if (!pw || !morph)
 732                 goto error;
 733
 734         isl_assert(pw->dim->ctx, isl_dim_equal(pw->dim, morph->dom->dim),
 735                 goto error);
 736
 737         pw = FN(PW,cow)(pw);
 738         if (!pw)
 739                 goto error;
 740         isl_dim_free(pw->dim);
 741         pw->dim = isl_dim_copy(morph->ran->dim);
 742         if (!pw->dim)
 743                 goto error;
 744
 745         for (i = 0; i < pw->n; ++i) {
 746                 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
 747                 if (!pw->p[i].set)
 748                         goto error;
 749                 pw->p[i].FIELD = FN(EL,morph)(pw->p[i].FIELD,
 750                                                 isl_morph_copy(morph));
 751                 if (!pw->p[i].FIELD)
 752                         goto error;
 753         }
 754
 755         isl_morph_free(morph);
 756
 757         return pw;
 758 error:
 759         FN(PW,free)(pw);
 760         isl_morph_free(morph);
 761         return NULL;
 762 }
 763
 764 int FN(PW,foreach_piece)(__isl_keep PW *pw,
 765         int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
 766         void *user)
 767 {
 768         int i;
 769
 770         if (!pw)
 771                 return -1;
 772
 773         for (i = 0; i < pw->n; ++i)
 774                 if (fn(isl_set_copy(pw->p[i].set),
 775                                 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
 776                         return -1;
 777
 778         return 0;
 779 }
 780
 781 static int any_divs(__isl_keep isl_set *set)
 782 {
 783         int i;
 784
 785         if (!set)
 786                 return -1;
 787
 788         for (i = 0; i < set->n; ++i)
 789                 if (set->p[i]->n_div > 0)
 790                         return 1;
 791
 792         return 0;
 793 }
 794
 795 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
 796         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 797                     void *user), void *user)
 798 {
 799         int i;
 800
 801         if (!set || !el)
 802                 goto error;
 803
 804         for (i = 0; i < set->n; ++i) {
 805                 isl_set *lift;
 806                 EL *copy;
 807
 808                 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
 809                 lift = isl_set_lift(lift);
 810
 811                 copy = FN(EL,copy)(el);
 812                 copy = FN(EL,lift)(copy, isl_set_get_dim(lift));
 813
 814                 if (fn(lift, copy, user) < 0)
 815                         goto error;
 816         }
 817
 818         isl_set_free(set);
 819         FN(EL,free)(el);
 820
 821         return 0;
 822 error:
 823         isl_set_free(set);
 824         FN(EL,free)(el);
 825         return -1;
 826 }
 827
 828 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
 829         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 830                     void *user), void *user)
 831 {
 832         int i;
 833
 834         if (!pw)
 835                 return -1;
 836
 837         for (i = 0; i < pw->n; ++i) {
 838                 isl_set *set;
 839                 EL *el;
 840
 841                 set = isl_set_copy(pw->p[i].set);
 842                 el = FN(EL,copy)(pw->p[i].FIELD);
 843                 if (!any_divs(set)) {
 844                         if (fn(set, el, user) < 0)
 845                                 return -1;
 846                         continue;
 847                 }
 848                 if (foreach_lifted_subset(set, el, fn, user) < 0)
 849                         return -1;
 850         }
 851
 852         return 0;
 853 }
 854
 855 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
 856         enum isl_dim_type dst_type, unsigned dst_pos,
 857         enum isl_dim_type src_type, unsigned src_pos, unsigned n)
 858 {
 859         int i;
 860
 861         pw = FN(PW,cow)(pw);
 862         if (!pw)
 863                 return NULL;
 864
 865         pw->dim = isl_dim_move(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
 866         if (!pw->dim)
 867                 goto error;
 868
 869         for (i = 0; i < pw->n; ++i) {
 870                 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
 871                                                 dst_type, dst_pos,
 872                                                 src_type, src_pos, n);
 873                 if (!pw->p[i].set)
 874                         goto error;
 875                 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
 876                                         dst_type, dst_pos, src_type, src_pos, n);
 877                 if (!pw->p[i].FIELD)
 878                         goto error;
 879         }
 880
 881         return pw;
 882 error:
 883         FN(PW,free)(pw);
 884         return NULL;
 885 }
 886
 887 __isl_give PW *FN(PW,realign)(__isl_take PW *pw, __isl_take isl_reordering *exp)
 888 {
 889         int i;
 890
 891         pw = FN(PW,cow)(pw);
 892         if (!pw || !exp)
 893                 return NULL;
 894
 895         for (i = 0; i < pw->n; ++i) {
 896                 pw->p[i].set = isl_set_realign(pw->p[i].set,
 897                                                     isl_reordering_copy(exp));
 898                 if (!pw->p[i].set)
 899                         goto error;
 900                 pw->p[i].FIELD = FN(EL,realign)(pw->p[i].FIELD,
 901                                                     isl_reordering_copy(exp));
 902                 if (!pw->p[i].FIELD)
 903                         goto error;
 904         }
 905
 906         pw = FN(PW,reset_dim)(pw, isl_dim_copy(exp->dim));
 907
 908         isl_reordering_free(exp);
 909         return pw;
 910 error:
 911         isl_reordering_free(exp);
 912         FN(PW,free)(pw);
 913         return NULL;
 914 }