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 = 0; i < pw->n; ++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         }
 417
 418         isl_basic_set_free(hull);
 419         isl_set_free(context);
 420
 421         return pw;
 422 error:
 423         FN(PW,free)(pw);
 424         isl_basic_set_free(hull);
 425         isl_set_free(context);
 426         return NULL;
 427 }
 428
 429 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
 430 {
 431         int i, j;
 432
 433         if (!pw)
 434                 return NULL;
 435         if (pw->n == 0)
 436                 return pw;
 437
 438         for (i = pw->n - 1; i >= 0; --i) {
 439                 for (j = i - 1; j >= 0; --j) {
 440                         if (!FN(EL,is_equal)(pw->p[i].FIELD, pw->p[j].FIELD))
 441                                 continue;
 442                         pw->p[j].set = isl_set_union(pw->p[j].set,
 443                                                         pw->p[i].set);
 444                         FN(EL,free)(pw->p[i].FIELD);
 445                         if (i != pw->n - 1)
 446                                 pw->p[i] = pw->p[pw->n - 1];
 447                         pw->n--;
 448                         break;
 449                 }
 450                 if (j >= 0)
 451                         continue;
 452                 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
 453                 if (!pw->p[i].set)
 454                         goto error;
 455         }
 456
 457         return pw;
 458 error:
 459         FN(PW,free)(pw);
 460         return NULL;
 461 }
 462
 463 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
 464 {
 465         return pw ? pw->dim->ctx : NULL;
 466 }
 467
 468 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
 469         unsigned first, unsigned n)
 470 {
 471         int i;
 472
 473         if (!pw)
 474                 return -1;
 475         if (pw->n == 0 || n == 0)
 476                 return 0;
 477         for (i = 0; i < pw->n; ++i) {
 478                 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
 479                                                         type, first, n);
 480                 if (involves < 0 || involves)
 481                         return involves;
 482         }
 483         return 0;
 484 }
 485
 486 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
 487         enum isl_dim_type type, unsigned pos, const char *s)
 488 {
 489         int i;
 490
 491         pw = FN(PW,cow)(pw);
 492         if (!pw)
 493                 return NULL;
 494
 495         pw->dim = isl_dim_set_name(pw->dim, type, pos, s);
 496         if (!pw->dim)
 497                 goto error;
 498
 499         for (i = 0; i < pw->n; ++i) {
 500                 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set, type, pos, s);
 501                 if (!pw->p[i].set)
 502                         goto error;
 503                 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
 504                 if (!pw->p[i].FIELD)
 505                         goto error;
 506         }
 507
 508         return pw;
 509 error:
 510         FN(PW,free)(pw);
 511         return NULL;
 512 }
 513
 514 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
 515         enum isl_dim_type type, unsigned first, unsigned n)
 516 {
 517         int i;
 518
 519         if (!pw)
 520                 return NULL;
 521         if (n == 0 && !isl_dim_get_tuple_name(pw->dim, type))
 522                 return pw;
 523
 524         pw = FN(PW,cow)(pw);
 525         if (!pw)
 526                 return NULL;
 527         pw->dim = isl_dim_drop(pw->dim, type, first, n);
 528         if (!pw->dim)
 529                 goto error;
 530         for (i = 0; i < pw->n; ++i) {
 531                 pw->p[i].set = isl_set_drop(pw->p[i].set, type, first, n);
 532                 if (!pw->p[i].set)
 533                         goto error;
 534                 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
 535                 if (!pw->p[i].FIELD)
 536                         goto error;
 537         }
 538
 539         return pw;
 540 error:
 541         FN(PW,free)(pw);
 542         return NULL;
 543 }
 544
 545 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
 546         unsigned first, unsigned n)
 547 {
 548         int i;
 549
 550         if (!pw)
 551                 return NULL;
 552         if (n == 0 && !isl_dim_is_named_or_nested(pw->dim, type))
 553                 return pw;
 554
 555         pw = FN(PW,cow)(pw);
 556         if (!pw)
 557                 return NULL;
 558
 559         pw->dim = isl_dim_insert(pw->dim, type, first, n);
 560         if (!pw->dim)
 561                 goto error;
 562
 563         for (i = 0; i < pw->n; ++i) {
 564                 pw->p[i].set = isl_set_insert(pw->p[i].set, type, first, n);
 565                 if (!pw->p[i].set)
 566                         goto error;
 567                 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
 568                                                                 type, first, n);
 569                 if (!pw->p[i].FIELD)
 570                         goto error;
 571         }
 572
 573         return pw;
 574 error:
 575         FN(PW,free)(pw);
 576         return NULL;
 577 }
 578
 579 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
 580         enum isl_dim_type type, unsigned pos, isl_int v)
 581 {
 582         int i;
 583
 584         if (!pw)
 585                 return NULL;
 586
 587         pw = FN(PW,cow)(pw);
 588         if (!pw)
 589                 return NULL;
 590         for (i = 0; i < pw->n; ++i) {
 591                 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
 592                 if (!pw->p[i].set)
 593                         goto error;
 594         }
 595
 596         return pw;
 597 error:
 598         FN(PW,free)(pw);
 599         return NULL;
 600 }
 601
 602 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
 603 {
 604         return pw ? isl_dim_size(pw->dim, type) : 0;
 605 }
 606
 607 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
 608         enum isl_dim_type type, unsigned first, unsigned n)
 609 {
 610         int i;
 611
 612         if (!pw)
 613                 return NULL;
 614         if (n == 0)
 615                 return pw;
 616
 617         pw = FN(PW,cow)(pw);
 618         if (!pw)
 619                 return NULL;
 620         if (!pw->dim)
 621                 goto error;
 622         for (i = 0; i < pw->n; ++i) {
 623                 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
 624                 if (!pw->p[i].set)
 625                         goto error;
 626         }
 627
 628         return pw;
 629 error:
 630         FN(PW,free)(pw);
 631         return NULL;
 632 }
 633
 634 /* Compute the maximal value attained by the piecewise quasipolynomial
 635  * on its domain or zero if the domain is empty.
 636  * In the worst case, the domain is scanned completely,
 637  * so the domain is assumed to be bounded.
 638  */
 639 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
 640 {
 641         int i;
 642         isl_qpolynomial *opt;
 643
 644         if (!pw)
 645                 return NULL;
 646
 647         if (pw->n == 0) {
 648                 isl_dim *dim = isl_dim_copy(pw->dim);
 649                 FN(PW,free)(pw);
 650                 return isl_qpolynomial_zero(dim);
 651         }
 652
 653         opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
 654                                         isl_set_copy(pw->p[0].set), max);
 655         for (i = 1; i < pw->n; ++i) {
 656                 isl_qpolynomial *opt_i;
 657                 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
 658                                                 isl_set_copy(pw->p[i].set), max);
 659                 if (max)
 660                         opt = isl_qpolynomial_max_cst(opt, opt_i);
 661                 else
 662                         opt = isl_qpolynomial_min_cst(opt, opt_i);
 663         }
 664
 665         FN(PW,free)(pw);
 666         return opt;
 667 }
 668
 669 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
 670 {
 671         return FN(PW,opt)(pw, 1);
 672 }
 673
 674 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
 675 {
 676         return FN(PW,opt)(pw, 0);
 677 }
 678
 679 __isl_give isl_dim *FN(PW,get_dim)(__isl_keep PW *pw)
 680 {
 681         return pw ? isl_dim_copy(pw->dim) : NULL;
 682 }
 683
 684 __isl_give PW *FN(PW,reset_dim)(__isl_take PW *pw, __isl_take isl_dim *dim)
 685 {
 686         int i;
 687
 688         pw = FN(PW,cow)(pw);
 689         if (!pw || !dim)
 690                 goto error;
 691
 692         for (i = 0; i < pw->n; ++i) {
 693                 pw->p[i].set = isl_set_reset_dim(pw->p[i].set,
 694                                                  isl_dim_copy(dim));
 695                 if (!pw->p[i].set)
 696                         goto error;
 697                 pw->p[i].FIELD = FN(EL,reset_dim)(pw->p[i].FIELD,
 698                                                   isl_dim_copy(dim));
 699                 if (!pw->p[i].FIELD)
 700                         goto error;
 701         }
 702         isl_dim_free(pw->dim);
 703         pw->dim = dim;
 704
 705         return pw;
 706 error:
 707         isl_dim_free(dim);
 708         FN(PW,free)(pw);
 709         return NULL;
 710 }
 711
 712 int FN(PW,has_equal_dim)(__isl_keep PW *pw1, __isl_keep PW *pw2)
 713 {
 714         if (!pw1 || !pw2)
 715                 return -1;
 716
 717         return isl_dim_equal(pw1->dim, pw2->dim);
 718 }
 719
 720 __isl_give PW *FN(PW,morph)(__isl_take PW *pw, __isl_take isl_morph *morph)
 721 {
 722         int i;
 723
 724         if (!pw || !morph)
 725                 goto error;
 726
 727         isl_assert(pw->dim->ctx, isl_dim_equal(pw->dim, morph->dom->dim),
 728                 goto error);
 729
 730         pw = FN(PW,cow)(pw);
 731         if (!pw)
 732                 goto error;
 733         isl_dim_free(pw->dim);
 734         pw->dim = isl_dim_copy(morph->ran->dim);
 735         if (!pw->dim)
 736                 goto error;
 737
 738         for (i = 0; i < pw->n; ++i) {
 739                 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
 740                 if (!pw->p[i].set)
 741                         goto error;
 742                 pw->p[i].FIELD = FN(EL,morph)(pw->p[i].FIELD,
 743                                                 isl_morph_copy(morph));
 744                 if (!pw->p[i].FIELD)
 745                         goto error;
 746         }
 747
 748         isl_morph_free(morph);
 749
 750         return pw;
 751 error:
 752         FN(PW,free)(pw);
 753         isl_morph_free(morph);
 754         return NULL;
 755 }
 756
 757 int FN(PW,foreach_piece)(__isl_keep PW *pw,
 758         int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
 759         void *user)
 760 {
 761         int i;
 762
 763         if (!pw)
 764                 return -1;
 765
 766         for (i = 0; i < pw->n; ++i)
 767                 if (fn(isl_set_copy(pw->p[i].set),
 768                                 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
 769                         return -1;
 770
 771         return 0;
 772 }
 773
 774 static int any_divs(__isl_keep isl_set *set)
 775 {
 776         int i;
 777
 778         if (!set)
 779                 return -1;
 780
 781         for (i = 0; i < set->n; ++i)
 782                 if (set->p[i]->n_div > 0)
 783                         return 1;
 784
 785         return 0;
 786 }
 787
 788 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
 789         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 790                     void *user), void *user)
 791 {
 792         int i;
 793
 794         if (!set || !el)
 795                 goto error;
 796
 797         for (i = 0; i < set->n; ++i) {
 798                 isl_set *lift;
 799                 EL *copy;
 800
 801                 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
 802                 lift = isl_set_lift(lift);
 803
 804                 copy = FN(EL,copy)(el);
 805                 copy = FN(EL,lift)(copy, isl_set_get_dim(lift));
 806
 807                 if (fn(lift, copy, user) < 0)
 808                         goto error;
 809         }
 810
 811         isl_set_free(set);
 812         FN(EL,free)(el);
 813
 814         return 0;
 815 error:
 816         isl_set_free(set);
 817         FN(EL,free)(el);
 818         return -1;
 819 }
 820
 821 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
 822         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 823                     void *user), void *user)
 824 {
 825         int i;
 826
 827         if (!pw)
 828                 return -1;
 829
 830         for (i = 0; i < pw->n; ++i) {
 831                 isl_set *set;
 832                 EL *el;
 833
 834                 set = isl_set_copy(pw->p[i].set);
 835                 el = FN(EL,copy)(pw->p[i].FIELD);
 836                 if (!any_divs(set)) {
 837                         if (fn(set, el, user) < 0)
 838                                 return -1;
 839                         continue;
 840                 }
 841                 if (foreach_lifted_subset(set, el, fn, user) < 0)
 842                         return -1;
 843         }
 844
 845         return 0;
 846 }
 847
 848 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
 849         enum isl_dim_type dst_type, unsigned dst_pos,
 850         enum isl_dim_type src_type, unsigned src_pos, unsigned n)
 851 {
 852         int i;
 853
 854         pw = FN(PW,cow)(pw);
 855         if (!pw)
 856                 return NULL;
 857
 858         pw->dim = isl_dim_move(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
 859         if (!pw->dim)
 860                 goto error;
 861
 862         for (i = 0; i < pw->n; ++i) {
 863                 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
 864                                                 dst_type, dst_pos,
 865                                                 src_type, src_pos, n);
 866                 if (!pw->p[i].set)
 867                         goto error;
 868                 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
 869                                         dst_type, dst_pos, src_type, src_pos, n);
 870                 if (!pw->p[i].FIELD)
 871                         goto error;
 872         }
 873
 874         return pw;
 875 error:
 876         FN(PW,free)(pw);
 877         return NULL;
 878 }
 879
 880 __isl_give PW *FN(PW,realign)(__isl_take PW *pw, __isl_take isl_reordering *exp)
 881 {
 882         int i;
 883
 884         pw = FN(PW,cow)(pw);
 885         if (!pw || !exp)
 886                 return NULL;
 887
 888         for (i = 0; i < pw->n; ++i) {
 889                 pw->p[i].set = isl_set_realign(pw->p[i].set,
 890                                                     isl_reordering_copy(exp));
 891                 if (!pw->p[i].set)
 892                         goto error;
 893                 pw->p[i].FIELD = FN(EL,realign)(pw->p[i].FIELD,
 894                                                     isl_reordering_copy(exp));
 895                 if (!pw->p[i].FIELD)
 896                         goto error;
 897         }
 898
 899         pw = FN(PW,reset_dim)(pw, isl_dim_copy(exp->dim));
 900
 901         isl_reordering_free(exp);
 902         return pw;
 903 error:
 904         isl_reordering_free(exp);
 905         FN(PW,free)(pw);
 906         return NULL;
 907 }