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         isl_ctx *ctx;
  14         struct PW *pw;
  15
  16         if (!dim)
  17                 return NULL;
  18         ctx = isl_dim_get_ctx(dim);
  19         isl_assert(ctx, n >= 0, goto error);
  20         pw = isl_alloc(ctx, struct PW,
  21                         sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
  22         if (!pw)
  23                 goto error;
  24
  25         pw->ref = 1;
  26 #ifdef HAS_TYPE
  27         pw->type = type;
  28 #endif
  29         pw->size = n;
  30         pw->n = 0;
  31         pw->dim = dim;
  32         return pw;
  33 error:
  34         isl_dim_free(dim);
  35         return NULL;
  36 }
  37
  38 #ifdef HAS_TYPE
  39 __isl_give PW *FN(PW,ZERO)(__isl_take isl_dim *dim, enum isl_fold type)
  40 {
  41         return FN(PW,alloc_)(dim, type, 0);
  42 }
  43 #else
  44 __isl_give PW *FN(PW,ZERO)(__isl_take isl_dim *dim)
  45 {
  46         return FN(PW,alloc_)(dim, 0);
  47 }
  48 #endif
  49
  50 __isl_give PW *FN(PW,add_piece)(__isl_take PW *pw,
  51         __isl_take isl_set *set, __isl_take EL *el)
  52 {
  53         isl_ctx *ctx;
  54         isl_dim *el_dim = NULL;
  55
  56         if (!pw || !set || !el)
  57                 goto error;
  58
  59         if (isl_set_plain_is_empty(set) || FN(EL,EL_IS_ZERO)(el)) {
  60                 isl_set_free(set);
  61                 FN(EL,free)(el);
  62                 return pw;
  63         }
  64
  65         ctx = isl_set_get_ctx(set);
  66 #ifdef HAS_TYPE
  67         if (pw->type != el->type)
  68                 isl_die(ctx, isl_error_invalid, "fold types don't match",
  69                         goto error);
  70 #endif
  71         el_dim = FN(EL,get_dim(el));
  72         isl_assert(ctx, isl_dim_equal(pw->dim, el_dim), goto error);
  73         isl_assert(ctx, pw->n < pw->size, goto error);
  74
  75         pw->p[pw->n].set = set;
  76         pw->p[pw->n].FIELD = el;
  77         pw->n++;
  78
  79         isl_dim_free(el_dim);
  80         return pw;
  81 error:
  82         isl_dim_free(el_dim);
  83         FN(PW,free)(pw);
  84         isl_set_free(set);
  85         FN(EL,free)(el);
  86         return NULL;
  87 }
  88
  89 #ifdef HAS_TYPE
  90 __isl_give PW *FN(PW,alloc)(enum isl_fold type,
  91         __isl_take isl_set *set, __isl_take EL *el)
  92 #else
  93 __isl_give PW *FN(PW,alloc)(__isl_take isl_set *set, __isl_take EL *el)
  94 #endif
  95 {
  96         PW *pw;
  97
  98         if (!set || !el)
  99                 goto error;
 100
 101 #ifdef HAS_TYPE
 102         pw = FN(PW,alloc_)(isl_set_get_dim(set), type, 1);
 103 #else
 104         pw = FN(PW,alloc_)(isl_set_get_dim(set), 1);
 105 #endif
 106
 107         return FN(PW,add_piece)(pw, set, el);
 108 error:
 109         isl_set_free(set);
 110         FN(EL,free)(el);
 111         return NULL;
 112 }
 113
 114 __isl_give PW *FN(PW,dup)(__isl_keep PW *pw)
 115 {
 116         int i;
 117         PW *dup;
 118
 119         if (!pw)
 120                 return NULL;
 121
 122 #ifdef HAS_TYPE
 123         dup = FN(PW,alloc_)(isl_dim_copy(pw->dim), pw->type, pw->n);
 124 #else
 125         dup = FN(PW,alloc_)(isl_dim_copy(pw->dim), pw->n);
 126 #endif
 127         if (!dup)
 128                 return NULL;
 129
 130         for (i = 0; i < pw->n; ++i)
 131                 dup = FN(PW,add_piece)(dup, isl_set_copy(pw->p[i].set),
 132                                             FN(EL,copy)(pw->p[i].FIELD));
 133
 134         return dup;
 135 }
 136
 137 __isl_give PW *FN(PW,cow)(__isl_take PW *pw)
 138 {
 139         if (!pw)
 140                 return NULL;
 141
 142         if (pw->ref == 1)
 143                 return pw;
 144         pw->ref--;
 145         return FN(PW,dup)(pw);
 146 }
 147
 148 __isl_give PW *FN(PW,copy)(__isl_keep PW *pw)
 149 {
 150         if (!pw)
 151                 return NULL;
 152
 153         pw->ref++;
 154         return pw;
 155 }
 156
 157 void *FN(PW,free)(__isl_take PW *pw)
 158 {
 159         int i;
 160
 161         if (!pw)
 162                 return NULL;
 163         if (--pw->ref > 0)
 164                 return NULL;
 165
 166         for (i = 0; i < pw->n; ++i) {
 167                 isl_set_free(pw->p[i].set);
 168                 FN(EL,free)(pw->p[i].FIELD);
 169         }
 170         isl_dim_free(pw->dim);
 171         free(pw);
 172
 173         return NULL;
 174 }
 175
 176 int FN(PW,IS_ZERO)(__isl_keep PW *pw)
 177 {
 178         if (!pw)
 179                 return -1;
 180
 181         return pw->n == 0;
 182 }
 183
 184 __isl_give PW *FN(PW,add)(__isl_take PW *pw1, __isl_take PW *pw2)
 185 {
 186         int i, j, n;
 187         struct PW *res;
 188         isl_ctx *ctx;
 189         isl_set *set;
 190
 191         if (!pw1 || !pw2)
 192                 goto error;
 193
 194         ctx = isl_dim_get_ctx(pw1->dim);
 195 #ifdef HAS_TYPE
 196         if (pw1->type != pw2->type)
 197                 isl_die(ctx, isl_error_invalid,
 198                         "fold types don't match", goto error);
 199 #endif
 200         isl_assert(ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
 201
 202         if (FN(PW,IS_ZERO)(pw1)) {
 203                 FN(PW,free)(pw1);
 204                 return pw2;
 205         }
 206
 207         if (FN(PW,IS_ZERO)(pw2)) {
 208                 FN(PW,free)(pw2);
 209                 return pw1;
 210         }
 211
 212         n = (pw1->n + 1) * (pw2->n + 1);
 213 #ifdef HAS_TYPE
 214         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->type, n);
 215 #else
 216         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), n);
 217 #endif
 218
 219         for (i = 0; i < pw1->n; ++i) {
 220                 set = isl_set_copy(pw1->p[i].set);
 221                 for (j = 0; j < pw2->n; ++j) {
 222                         struct isl_set *common;
 223                         EL *sum;
 224                         set = isl_set_subtract(set,
 225                                         isl_set_copy(pw2->p[j].set));
 226                         common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
 227                                                 isl_set_copy(pw2->p[j].set));
 228                         if (isl_set_plain_is_empty(common)) {
 229                                 isl_set_free(common);
 230                                 continue;
 231                         }
 232
 233                         sum = FN(EL,add_on_domain)(common,
 234                                                    FN(EL,copy)(pw1->p[i].FIELD),
 235                                                    FN(EL,copy)(pw2->p[j].FIELD));
 236
 237                         res = FN(PW,add_piece)(res, common, sum);
 238                 }
 239                 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw1->p[i].FIELD));
 240         }
 241
 242         for (j = 0; j < pw2->n; ++j) {
 243                 set = isl_set_copy(pw2->p[j].set);
 244                 for (i = 0; i < pw1->n; ++i)
 245                         set = isl_set_subtract(set,
 246                                         isl_set_copy(pw1->p[i].set));
 247                 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw2->p[j].FIELD));
 248         }
 249
 250         FN(PW,free)(pw1);
 251         FN(PW,free)(pw2);
 252
 253         return res;
 254 error:
 255         FN(PW,free)(pw1);
 256         FN(PW,free)(pw2);
 257         return NULL;
 258 }
 259
 260 __isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
 261 {
 262         int i;
 263         isl_ctx *ctx;
 264         PW *res;
 265
 266         if (!pw1 || !pw2)
 267                 goto error;
 268
 269         ctx = isl_dim_get_ctx(pw1->dim);
 270 #ifdef HAS_TYPE
 271         if (pw1->type != pw2->type)
 272                 isl_die(ctx, isl_error_invalid,
 273                         "fold types don't match", goto error);
 274 #endif
 275         isl_assert(ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
 276
 277         if (FN(PW,IS_ZERO)(pw1)) {
 278                 FN(PW,free)(pw1);
 279                 return pw2;
 280         }
 281
 282         if (FN(PW,IS_ZERO)(pw2)) {
 283                 FN(PW,free)(pw2);
 284                 return pw1;
 285         }
 286
 287 #ifdef HAS_TYPE
 288         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->type, pw1->n + pw2->n);
 289 #else
 290         res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->n + pw2->n);
 291 #endif
 292
 293         for (i = 0; i < pw1->n; ++i)
 294                 res = FN(PW,add_piece)(res,
 295                                 isl_set_copy(pw1->p[i].set),
 296                                 FN(EL,copy)(pw1->p[i].FIELD));
 297
 298         for (i = 0; i < pw2->n; ++i)
 299                 res = FN(PW,add_piece)(res,
 300                                 isl_set_copy(pw2->p[i].set),
 301                                 FN(EL,copy)(pw2->p[i].FIELD));
 302
 303         FN(PW,free)(pw1);
 304         FN(PW,free)(pw2);
 305
 306         return res;
 307 error:
 308         FN(PW,free)(pw1);
 309         FN(PW,free)(pw2);
 310         return NULL;
 311 }
 312
 313 #ifndef NO_NEG
 314 __isl_give PW *FN(PW,neg)(__isl_take PW *pw)
 315 {
 316         int i;
 317
 318         if (!pw)
 319                 return NULL;
 320
 321         if (FN(PW,IS_ZERO)(pw))
 322                 return pw;
 323
 324         pw = FN(PW,cow)(pw);
 325         if (!pw)
 326                 return NULL;
 327
 328         for (i = 0; i < pw->n; ++i) {
 329                 pw->p[i].FIELD = FN(EL,neg)(pw->p[i].FIELD);
 330                 if (!pw->p[i].FIELD)
 331                         return FN(PW,free)(pw);
 332         }
 333
 334         return pw;
 335 }
 336 #endif
 337
 338 #ifndef NO_EVAL
 339 __isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
 340         __isl_take isl_point *pnt)
 341 {
 342         int i;
 343         int found = 0;
 344         isl_ctx *ctx;
 345         isl_dim *pnt_dim = NULL;
 346         isl_qpolynomial *qp;
 347
 348         if (!pw || !pnt)
 349                 goto error;
 350         ctx = isl_point_get_ctx(pnt);
 351         pnt_dim = isl_point_get_dim(pnt);
 352         isl_assert(ctx, isl_dim_equal(pnt_dim, pw->dim), goto error);
 353
 354         for (i = 0; i < pw->n; ++i) {
 355                 found = isl_set_contains_point(pw->p[i].set, pnt);
 356                 if (found < 0)
 357                         goto error;
 358                 if (found)
 359                         break;
 360         }
 361         if (found)
 362                 qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
 363                                             isl_point_copy(pnt));
 364         else
 365                 qp = isl_qpolynomial_zero(isl_dim_copy(pw->dim));
 366         FN(PW,free)(pw);
 367         isl_dim_free(pnt_dim);
 368         isl_point_free(pnt);
 369         return qp;
 370 error:
 371         FN(PW,free)(pw);
 372         isl_dim_free(pnt_dim);
 373         isl_point_free(pnt);
 374         return NULL;
 375 }
 376 #endif
 377
 378 __isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
 379 {
 380         int i;
 381         isl_set *dom;
 382
 383         if (!pw)
 384                 return NULL;
 385
 386         dom = isl_set_empty(isl_dim_copy(pw->dim));
 387         for (i = 0; i < pw->n; ++i)
 388                 dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
 389
 390         FN(PW,free)(pw);
 391
 392         return dom;
 393 }
 394
 395 __isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw, __isl_take isl_set *set)
 396 {
 397         int i;
 398
 399         if (!pw || !set)
 400                 goto error;
 401
 402         if (pw->n == 0) {
 403                 isl_set_free(set);
 404                 return pw;
 405         }
 406
 407         pw = FN(PW,cow)(pw);
 408         if (!pw)
 409                 goto error;
 410
 411         for (i = pw->n - 1; i >= 0; --i) {
 412                 isl_basic_set *aff;
 413                 pw->p[i].set = isl_set_intersect(pw->p[i].set, isl_set_copy(set));
 414                 if (!pw->p[i].set)
 415                         goto error;
 416                 aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
 417                 pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
 418                                                                 aff);
 419                 if (isl_set_plain_is_empty(pw->p[i].set)) {
 420                         isl_set_free(pw->p[i].set);
 421                         FN(EL,free)(pw->p[i].FIELD);
 422                         if (i != pw->n - 1)
 423                                 pw->p[i] = pw->p[pw->n - 1];
 424                         pw->n--;
 425                 }
 426         }
 427
 428         isl_set_free(set);
 429         return pw;
 430 error:
 431         isl_set_free(set);
 432         FN(PW,free)(pw);
 433         return NULL;
 434 }
 435
 436 __isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
 437 {
 438         int i;
 439         isl_basic_set *hull = NULL;
 440
 441         if (!pw || !context)
 442                 goto error;
 443
 444         if (pw->n == 0) {
 445                 isl_set_free(context);
 446                 return pw;
 447         }
 448
 449         context = isl_set_compute_divs(context);
 450         hull = isl_set_simple_hull(isl_set_copy(context));
 451
 452         pw = FN(PW,cow)(pw);
 453         if (!pw)
 454                 goto error;
 455
 456         for (i = pw->n - 1; i >= 0; --i) {
 457                 pw->p[i].set = isl_set_intersect(pw->p[i].set,
 458                                                  isl_set_copy(context));
 459                 if (!pw->p[i].set)
 460                         goto error;
 461                 pw->p[i].FIELD = FN(EL,gist)(pw->p[i].FIELD,
 462                                              isl_set_copy(pw->p[i].set));
 463                 pw->p[i].set = isl_set_gist_basic_set(pw->p[i].set,
 464                                                 isl_basic_set_copy(hull));
 465                 if (!pw->p[i].set)
 466                         goto error;
 467                 if (isl_set_plain_is_empty(pw->p[i].set)) {
 468                         isl_set_free(pw->p[i].set);
 469                         FN(EL,free)(pw->p[i].FIELD);
 470                         if (i != pw->n - 1)
 471                                 pw->p[i] = pw->p[pw->n - 1];
 472                         pw->n--;
 473                 }
 474         }
 475
 476         isl_basic_set_free(hull);
 477         isl_set_free(context);
 478
 479         return pw;
 480 error:
 481         FN(PW,free)(pw);
 482         isl_basic_set_free(hull);
 483         isl_set_free(context);
 484         return NULL;
 485 }
 486
 487 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
 488 {
 489         int i, j;
 490
 491         if (!pw)
 492                 return NULL;
 493         if (pw->n == 0)
 494                 return pw;
 495
 496         for (i = pw->n - 1; i >= 0; --i) {
 497                 for (j = i - 1; j >= 0; --j) {
 498                         if (!FN(EL,plain_is_equal)(pw->p[i].FIELD,
 499                                                         pw->p[j].FIELD))
 500                                 continue;
 501                         pw->p[j].set = isl_set_union(pw->p[j].set,
 502                                                         pw->p[i].set);
 503                         FN(EL,free)(pw->p[i].FIELD);
 504                         if (i != pw->n - 1)
 505                                 pw->p[i] = pw->p[pw->n - 1];
 506                         pw->n--;
 507                         break;
 508                 }
 509                 if (j >= 0)
 510                         continue;
 511                 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
 512                 if (!pw->p[i].set)
 513                         goto error;
 514         }
 515
 516         return pw;
 517 error:
 518         FN(PW,free)(pw);
 519         return NULL;
 520 }
 521
 522 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
 523 {
 524         return pw ? isl_dim_get_ctx(pw->dim) : NULL;
 525 }
 526
 527 #ifndef NO_INVOLVES_DIMS
 528 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
 529         unsigned first, unsigned n)
 530 {
 531         int i;
 532
 533         if (!pw)
 534                 return -1;
 535         if (pw->n == 0 || n == 0)
 536                 return 0;
 537         for (i = 0; i < pw->n; ++i) {
 538                 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
 539                                                         type, first, n);
 540                 if (involves < 0 || involves)
 541                         return involves;
 542                 involves = isl_set_involves_dims(pw->p[i].set, type, first, n);
 543                 if (involves < 0 || involves)
 544                         return involves;
 545         }
 546         return 0;
 547 }
 548 #endif
 549
 550 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
 551         enum isl_dim_type type, unsigned pos, const char *s)
 552 {
 553         int i;
 554
 555         pw = FN(PW,cow)(pw);
 556         if (!pw)
 557                 return NULL;
 558
 559         pw->dim = isl_dim_set_name(pw->dim, type, pos, s);
 560         if (!pw->dim)
 561                 goto error;
 562
 563         for (i = 0; i < pw->n; ++i) {
 564                 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set, type, pos, s);
 565                 if (!pw->p[i].set)
 566                         goto error;
 567                 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
 568                 if (!pw->p[i].FIELD)
 569                         goto error;
 570         }
 571
 572         return pw;
 573 error:
 574         FN(PW,free)(pw);
 575         return NULL;
 576 }
 577
 578 #ifndef NO_DROP_DIMS
 579 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
 580         enum isl_dim_type type, unsigned first, unsigned n)
 581 {
 582         int i;
 583
 584         if (!pw)
 585                 return NULL;
 586         if (n == 0 && !isl_dim_get_tuple_name(pw->dim, type))
 587                 return pw;
 588
 589         pw = FN(PW,cow)(pw);
 590         if (!pw)
 591                 return NULL;
 592         pw->dim = isl_dim_drop(pw->dim, type, first, n);
 593         if (!pw->dim)
 594                 goto error;
 595         for (i = 0; i < pw->n; ++i) {
 596                 pw->p[i].set = isl_set_drop(pw->p[i].set, type, first, n);
 597                 if (!pw->p[i].set)
 598                         goto error;
 599                 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
 600                 if (!pw->p[i].FIELD)
 601                         goto error;
 602         }
 603
 604         return pw;
 605 error:
 606         FN(PW,free)(pw);
 607         return NULL;
 608 }
 609 #endif
 610
 611 #ifndef NO_INSERT_DIMS
 612 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
 613         unsigned first, unsigned n)
 614 {
 615         int i;
 616
 617         if (!pw)
 618                 return NULL;
 619         if (n == 0 && !isl_dim_is_named_or_nested(pw->dim, type))
 620                 return pw;
 621
 622         pw = FN(PW,cow)(pw);
 623         if (!pw)
 624                 return NULL;
 625
 626         pw->dim = isl_dim_insert(pw->dim, type, first, n);
 627         if (!pw->dim)
 628                 goto error;
 629
 630         for (i = 0; i < pw->n; ++i) {
 631                 pw->p[i].set = isl_set_insert(pw->p[i].set, type, first, n);
 632                 if (!pw->p[i].set)
 633                         goto error;
 634                 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
 635                                                                 type, first, n);
 636                 if (!pw->p[i].FIELD)
 637                         goto error;
 638         }
 639
 640         return pw;
 641 error:
 642         FN(PW,free)(pw);
 643         return NULL;
 644 }
 645 #endif
 646
 647 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
 648         enum isl_dim_type type, unsigned pos, isl_int v)
 649 {
 650         int i;
 651
 652         if (!pw)
 653                 return NULL;
 654
 655         pw = FN(PW,cow)(pw);
 656         if (!pw)
 657                 return NULL;
 658         for (i = 0; i < pw->n; ++i) {
 659                 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
 660                 if (!pw->p[i].set)
 661                         goto error;
 662         }
 663
 664         return pw;
 665 error:
 666         FN(PW,free)(pw);
 667         return NULL;
 668 }
 669
 670 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
 671 {
 672         return pw ? isl_dim_size(pw->dim, type) : 0;
 673 }
 674
 675 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
 676         enum isl_dim_type type, unsigned first, unsigned n)
 677 {
 678         int i;
 679
 680         if (!pw)
 681                 return NULL;
 682         if (n == 0)
 683                 return pw;
 684
 685         pw = FN(PW,cow)(pw);
 686         if (!pw)
 687                 return NULL;
 688         if (!pw->dim)
 689                 goto error;
 690         for (i = 0; i < pw->n; ++i) {
 691                 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
 692                 if (!pw->p[i].set)
 693                         goto error;
 694         }
 695
 696         return pw;
 697 error:
 698         FN(PW,free)(pw);
 699         return NULL;
 700 }
 701
 702 #ifndef NO_OPT
 703 /* Compute the maximal value attained by the piecewise quasipolynomial
 704  * on its domain or zero if the domain is empty.
 705  * In the worst case, the domain is scanned completely,
 706  * so the domain is assumed to be bounded.
 707  */
 708 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
 709 {
 710         int i;
 711         isl_qpolynomial *opt;
 712
 713         if (!pw)
 714                 return NULL;
 715
 716         if (pw->n == 0) {
 717                 isl_dim *dim = isl_dim_copy(pw->dim);
 718                 FN(PW,free)(pw);
 719                 return isl_qpolynomial_zero(dim);
 720         }
 721
 722         opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
 723                                         isl_set_copy(pw->p[0].set), max);
 724         for (i = 1; i < pw->n; ++i) {
 725                 isl_qpolynomial *opt_i;
 726                 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
 727                                                 isl_set_copy(pw->p[i].set), max);
 728                 if (max)
 729                         opt = isl_qpolynomial_max_cst(opt, opt_i);
 730                 else
 731                         opt = isl_qpolynomial_min_cst(opt, opt_i);
 732         }
 733
 734         FN(PW,free)(pw);
 735         return opt;
 736 }
 737
 738 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
 739 {
 740         return FN(PW,opt)(pw, 1);
 741 }
 742
 743 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
 744 {
 745         return FN(PW,opt)(pw, 0);
 746 }
 747 #endif
 748
 749 __isl_give isl_dim *FN(PW,get_dim)(__isl_keep PW *pw)
 750 {
 751         return pw ? isl_dim_copy(pw->dim) : NULL;
 752 }
 753
 754 #ifndef NO_RESET_DIM
 755 __isl_give PW *FN(PW,reset_dim)(__isl_take PW *pw, __isl_take isl_dim *dim)
 756 {
 757         int i;
 758
 759         pw = FN(PW,cow)(pw);
 760         if (!pw || !dim)
 761                 goto error;
 762
 763         for (i = 0; i < pw->n; ++i) {
 764                 pw->p[i].set = isl_set_reset_dim(pw->p[i].set,
 765                                                  isl_dim_copy(dim));
 766                 if (!pw->p[i].set)
 767                         goto error;
 768                 pw->p[i].FIELD = FN(EL,reset_dim)(pw->p[i].FIELD,
 769                                                   isl_dim_copy(dim));
 770                 if (!pw->p[i].FIELD)
 771                         goto error;
 772         }
 773         isl_dim_free(pw->dim);
 774         pw->dim = dim;
 775
 776         return pw;
 777 error:
 778         isl_dim_free(dim);
 779         FN(PW,free)(pw);
 780         return NULL;
 781 }
 782 #endif
 783
 784 int FN(PW,has_equal_dim)(__isl_keep PW *pw1, __isl_keep PW *pw2)
 785 {
 786         if (!pw1 || !pw2)
 787                 return -1;
 788
 789         return isl_dim_equal(pw1->dim, pw2->dim);
 790 }
 791
 792 #ifndef NO_MORPH
 793 __isl_give PW *FN(PW,morph)(__isl_take PW *pw, __isl_take isl_morph *morph)
 794 {
 795         int i;
 796         isl_ctx *ctx;
 797
 798         if (!pw || !morph)
 799                 goto error;
 800
 801         ctx = isl_dim_get_ctx(pw->dim);
 802         isl_assert(ctx, isl_dim_equal(pw->dim, morph->dom->dim),
 803                 goto error);
 804
 805         pw = FN(PW,cow)(pw);
 806         if (!pw)
 807                 goto error;
 808         isl_dim_free(pw->dim);
 809         pw->dim = isl_dim_copy(morph->ran->dim);
 810         if (!pw->dim)
 811                 goto error;
 812
 813         for (i = 0; i < pw->n; ++i) {
 814                 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
 815                 if (!pw->p[i].set)
 816                         goto error;
 817                 pw->p[i].FIELD = FN(EL,morph)(pw->p[i].FIELD,
 818                                                 isl_morph_copy(morph));
 819                 if (!pw->p[i].FIELD)
 820                         goto error;
 821         }
 822
 823         isl_morph_free(morph);
 824
 825         return pw;
 826 error:
 827         FN(PW,free)(pw);
 828         isl_morph_free(morph);
 829         return NULL;
 830 }
 831 #endif
 832
 833 int FN(PW,foreach_piece)(__isl_keep PW *pw,
 834         int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
 835         void *user)
 836 {
 837         int i;
 838
 839         if (!pw)
 840                 return -1;
 841
 842         for (i = 0; i < pw->n; ++i)
 843                 if (fn(isl_set_copy(pw->p[i].set),
 844                                 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
 845                         return -1;
 846
 847         return 0;
 848 }
 849
 850 #ifndef NO_LIFT
 851 static int any_divs(__isl_keep isl_set *set)
 852 {
 853         int i;
 854
 855         if (!set)
 856                 return -1;
 857
 858         for (i = 0; i < set->n; ++i)
 859                 if (set->p[i]->n_div > 0)
 860                         return 1;
 861
 862         return 0;
 863 }
 864
 865 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
 866         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 867                     void *user), void *user)
 868 {
 869         int i;
 870
 871         if (!set || !el)
 872                 goto error;
 873
 874         for (i = 0; i < set->n; ++i) {
 875                 isl_set *lift;
 876                 EL *copy;
 877
 878                 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
 879                 lift = isl_set_lift(lift);
 880
 881                 copy = FN(EL,copy)(el);
 882                 copy = FN(EL,lift)(copy, isl_set_get_dim(lift));
 883
 884                 if (fn(lift, copy, user) < 0)
 885                         goto error;
 886         }
 887
 888         isl_set_free(set);
 889         FN(EL,free)(el);
 890
 891         return 0;
 892 error:
 893         isl_set_free(set);
 894         FN(EL,free)(el);
 895         return -1;
 896 }
 897
 898 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
 899         int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
 900                     void *user), void *user)
 901 {
 902         int i;
 903
 904         if (!pw)
 905                 return -1;
 906
 907         for (i = 0; i < pw->n; ++i) {
 908                 isl_set *set;
 909                 EL *el;
 910
 911                 set = isl_set_copy(pw->p[i].set);
 912                 el = FN(EL,copy)(pw->p[i].FIELD);
 913                 if (!any_divs(set)) {
 914                         if (fn(set, el, user) < 0)
 915                                 return -1;
 916                         continue;
 917                 }
 918                 if (foreach_lifted_subset(set, el, fn, user) < 0)
 919                         return -1;
 920         }
 921
 922         return 0;
 923 }
 924 #endif
 925
 926 #ifndef NO_MOVE_DIMS
 927 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
 928         enum isl_dim_type dst_type, unsigned dst_pos,
 929         enum isl_dim_type src_type, unsigned src_pos, unsigned n)
 930 {
 931         int i;
 932
 933         pw = FN(PW,cow)(pw);
 934         if (!pw)
 935                 return NULL;
 936
 937         pw->dim = isl_dim_move(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
 938         if (!pw->dim)
 939                 goto error;
 940
 941         for (i = 0; i < pw->n; ++i) {
 942                 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
 943                                                 dst_type, dst_pos,
 944                                                 src_type, src_pos, n);
 945                 if (!pw->p[i].set)
 946                         goto error;
 947                 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
 948                                         dst_type, dst_pos, src_type, src_pos, n);
 949                 if (!pw->p[i].FIELD)
 950                         goto error;
 951         }
 952
 953         return pw;
 954 error:
 955         FN(PW,free)(pw);
 956         return NULL;
 957 }
 958 #endif
 959
 960 #ifndef NO_REALIGN
 961 __isl_give PW *FN(PW,realign)(__isl_take PW *pw, __isl_take isl_reordering *exp)
 962 {
 963         int i;
 964
 965         pw = FN(PW,cow)(pw);
 966         if (!pw || !exp)
 967                 return NULL;
 968
 969         for (i = 0; i < pw->n; ++i) {
 970                 pw->p[i].set = isl_set_realign(pw->p[i].set,
 971                                                     isl_reordering_copy(exp));
 972                 if (!pw->p[i].set)
 973                         goto error;
 974                 pw->p[i].FIELD = FN(EL,realign)(pw->p[i].FIELD,
 975                                                     isl_reordering_copy(exp));
 976                 if (!pw->p[i].FIELD)
 977                         goto error;
 978         }
 979
 980         pw = FN(PW,reset_dim)(pw, isl_dim_copy(exp->dim));
 981
 982         isl_reordering_free(exp);
 983         return pw;
 984 error:
 985         isl_reordering_free(exp);
 986         FN(PW,free)(pw);
 987         return NULL;
 988 }
 989 #endif
 990
 991 __isl_give PW *FN(PW,mul_isl_int)(__isl_take PW *pw, isl_int v)
 992 {
 993         int i;
 994
 995         if (isl_int_is_one(v))
 996                 return pw;
 997         if (pw && isl_int_is_zero(v)) {
 998                 PW *zero;
 999                 isl_dim *dim = FN(PW,get_dim)(pw);
1000 #ifdef HAS_TYPE
1001                 zero = FN(PW,ZERO)(dim, pw->type);
1002 #else
1003                 zero = FN(PW,ZERO)(dim);
1004 #endif
1005                 FN(PW,free)(pw);
1006                 return zero;
1007         }
1008         pw = FN(PW,cow)(pw);
1009         if (!pw)
1010                 return NULL;
1011         if (pw->n == 0)
1012                 return pw;
1013
1014 #ifdef HAS_TYPE
1015         if (isl_int_is_neg(v))
1016                 pw->type = isl_fold_type_negate(pw->type);
1017 #endif
1018         for (i = 0; i < pw->n; ++i) {
1019                 pw->p[i].FIELD = FN(EL,scale)(pw->p[i].FIELD, v);
1020                 if (!pw->p[i].FIELD)
1021                         goto error;
1022         }
1023
1024         return pw;
1025 error:
1026         FN(PW,free)(pw);
1027         return NULL;
1028 }