gcc/graphite-poly.h

   1 /* Graphite polyhedral representation.
   2    Copyright (C) 2009 Free Software Foundation, Inc.
   3    Contributed by Sebastian Pop <sebastian.pop@amd.com> and
   4    Tobias Grosser <grosser@fim.uni-passau.de>.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_GRAPHITE_POLY_H
  23 #define GCC_GRAPHITE_POLY_H
  24
  25 typedef struct poly_dr *poly_dr_p;
  26 DEF_VEC_P(poly_dr_p);
  27 DEF_VEC_ALLOC_P (poly_dr_p, heap);
  28
  29 typedef struct poly_bb *poly_bb_p;
  30 DEF_VEC_P(poly_bb_p);
  31 DEF_VEC_ALLOC_P (poly_bb_p, heap);
  32
  33 typedef struct scop *scop_p;
  34 DEF_VEC_P(scop_p);
  35 DEF_VEC_ALLOC_P (scop_p, heap);
  36
  37 typedef ppl_dimension_type graphite_dim_t;
  38
  39 static inline graphite_dim_t pbb_dim_iter_domain (const struct poly_bb *);
  40 static inline graphite_dim_t pbb_nb_params (const struct poly_bb *);
  41 static inline graphite_dim_t scop_nb_params (scop_p);
  42
  43 /* A data reference can write or read some memory or we
  44    just know it may write some memory.  */
  45 enum POLY_DR_TYPE
  46 {
  47   PDR_READ,
  48   /* PDR_MAY_READs are represented using PDR_READS. This does not limit the
  49      expressiveness.  */
  50   PDR_WRITE,
  51   PDR_MAY_WRITE
  52 };
  53
  54 struct poly_dr
  55 {
  56   /* A pointer to compiler's data reference description.  */
  57   void *compiler_dr;
  58
  59   /* A pointer to the PBB that contains this data reference.  */
  60   poly_bb_p pbb;
  61
  62   enum POLY_DR_TYPE type;
  63
  64   /* The access polyhedron contains the polyhedral space this data
  65      reference will access.
  66
  67      The polyhedron contains these dimensions:
  68
  69       - The alias set (a):
  70       Every memory access is classified in at least one alias set.
  71
  72       - The subscripts (s_0, ..., s_n):
  73       The memory is accessed using zero or more subscript dimensions.
  74
  75       - The iteration domain (variables and parameters)
  76
  77      Do not hardcode the dimensions.  Use the following accessor functions:
  78      - pdr_alias_set_dim
  79      - pdr_subscript_dim
  80      - pdr_iterator_dim
  81      - pdr_parameter_dim
  82
  83      Example:
  84
  85      | int A[1335][123];
  86      | int *p = malloc ();
  87      |
  88      | k = ...
  89      | for i
  90      |   {
  91      |     if (unknown_function ())
  92      |       p = A;
  93      |       ... = p[?][?];
  94      |     for j
  95      |       A[i][j+k] = m;
  96      |   }
  97
  98      The data access A[i][j+k] in alias set "5" is described like this:
  99
 100      | i   j   k   a  s0  s1   1
 101      | 0   0   0   1   0   0  -5     =  0
 102      |-1   0   0   0   1   0   0     =  0
 103      | 0  -1  -1   0   0   1   0     =  0
 104      | 0   0   0   0   1   0   0     >= 0  # The last four lines describe the
 105      | 0   0   0   0   0   1   0     >= 0  # array size.
 106      | 0   0   0   0  -1   0 1335    >= 0
 107      | 0   0   0   0   0  -1 123     >= 0
 108
 109      The pointer "*p" in alias set "5" and "7" is described as a union of
 110      polyhedron:
 111
 112
 113      | i   k   a  s0   1
 114      | 0   0   1   0  -5   =  0
 115      | 0   0   0   1   0   >= 0
 116
 117      "or"
 118
 119      | i   k   a  s0   1
 120      | 0   0   1   0  -7   =  0
 121      | 0   0   0   1   0   >= 0
 122
 123      "*p" accesses all of the object allocated with 'malloc'.
 124
 125      The scalar data access "m" is represented as an array with zero subscript
 126      dimensions.
 127
 128      | i   j   k   a   1
 129      | 0   0   0  -1   15  = 0 */
 130   ppl_Pointset_Powerset_C_Polyhedron_t accesses;
 131
 132   /* The number of subscripts.  */
 133   graphite_dim_t nb_subscripts;
 134 };
 135
 136 #define PDR_CDR(PDR) (PDR->compiler_dr)
 137 #define PDR_PBB(PDR) (PDR->pbb)
 138 #define PDR_TYPE(PDR) (PDR->type)
 139 #define PDR_ACCESSES(PDR) (PDR->accesses)
 140 #define PDR_NB_SUBSCRIPTS(PDR) (PDR->nb_subscripts)
 141
 142 void new_poly_dr (poly_bb_p, ppl_Pointset_Powerset_C_Polyhedron_t,
 143                   enum POLY_DR_TYPE, void *, int);
 144 void free_poly_dr (poly_dr_p);
 145 void debug_pdr (poly_dr_p);
 146 void print_pdr (FILE *, poly_dr_p);
 147 static inline scop_p pdr_scop (poly_dr_p pdr);
 148
 149 /* The dimension of the PDR_ACCESSES polyhedron of PDR.  */
 150
 151 static inline ppl_dimension_type
 152 pdr_dim (poly_dr_p pdr)
 153 {
 154   ppl_dimension_type dim;
 155   ppl_Pointset_Powerset_C_Polyhedron_space_dimension (PDR_ACCESSES (pdr),
 156                                                       &dim);
 157   return dim;
 158 }
 159
 160 /* The dimension of the iteration domain of the scop of PDR.  */
 161
 162 static inline ppl_dimension_type
 163 pdr_dim_iter_domain (poly_dr_p pdr)
 164 {
 165   return pbb_dim_iter_domain (PDR_PBB (pdr));
 166 }
 167
 168 /* The number of parameters of the scop of PDR.  */
 169
 170 static inline ppl_dimension_type
 171 pdr_nb_params (poly_dr_p pdr)
 172 {
 173   return scop_nb_params (pdr_scop (pdr));
 174 }
 175
 176 /* The dimension of the alias set in PDR.  */
 177
 178 static inline ppl_dimension_type
 179 pdr_alias_set_dim (poly_dr_p pdr)
 180 {
 181   poly_bb_p pbb = PDR_PBB (pdr);
 182
 183   return pbb_dim_iter_domain (pbb) + pbb_nb_params (pbb);
 184 }
 185
 186 /* The dimension in PDR containing subscript S.  */
 187
 188 static inline ppl_dimension_type
 189 pdr_subscript_dim (poly_dr_p pdr, graphite_dim_t s)
 190 {
 191   poly_bb_p pbb = PDR_PBB (pdr);
 192
 193   return pbb_dim_iter_domain (pbb) + pbb_nb_params (pbb) + 1 + s;
 194 }
 195
 196 /* The dimension in PDR containing the loop iterator ITER.  */
 197
 198 static inline ppl_dimension_type
 199 pdr_iterator_dim (poly_dr_p pdr ATTRIBUTE_UNUSED, graphite_dim_t iter)
 200 {
 201   return iter;
 202 }
 203
 204 /* The dimension in PDR containing parameter PARAM.  */
 205
 206 static inline ppl_dimension_type
 207 pdr_parameter_dim (poly_dr_p pdr, graphite_dim_t param)
 208 {
 209   poly_bb_p pbb = PDR_PBB (pdr);
 210
 211   return pbb_dim_iter_domain (pbb) + param;
 212 }
 213
 214 typedef struct poly_scattering *poly_scattering_p;
 215
 216 struct poly_scattering
 217 {
 218   /* The scattering function containing the transformations.  */
 219   ppl_Polyhedron_t scattering;
 220
 221   /* The number of local variables.  */
 222   int nb_local_variables;
 223
 224   /* The number of scattering dimensions.  */
 225   int nb_scattering;
 226 };
 227
 228 /* POLY_BB represents a blackbox in the polyhedral model.  */
 229
 230 struct poly_bb
 231 {
 232   void *black_box;
 233
 234   scop_p scop;
 235
 236   /* The iteration domain of this bb.
 237      Example:
 238
 239      for (i = a - 7*b + 8; i <= 3*a + 13*b + 20; i++)
 240        for (j = 2; j <= 2*i + 5; j++)
 241          for (k = 0; k <= 5; k++)
 242            S (i,j,k)
 243
 244      Loop iterators: i, j, k
 245      Parameters: a, b
 246
 247      | i >=  a -  7b +  8
 248      | i <= 3a + 13b + 20
 249      | j >= 2
 250      | j <= 2i + 5
 251      | k >= 0
 252      | k <= 5
 253
 254      The number of variables in the DOMAIN may change and is not
 255      related to the number of loops in the original code.  */
 256   ppl_Pointset_Powerset_C_Polyhedron_t domain;
 257
 258   /* The data references we access.  */
 259   VEC (poly_dr_p, heap) *drs;
 260
 261   /* The original scattering.  */
 262   poly_scattering_p original;
 263
 264   /* The transformed scattering.  */
 265   poly_scattering_p transformed;
 266
 267   /* A copy of the transformed scattering.  */
 268   poly_scattering_p saved;
 269 };
 270
 271 #define PBB_BLACK_BOX(PBB) ((gimple_bb_p) PBB->black_box)
 272 #define PBB_SCOP(PBB) (PBB->scop)
 273 #define PBB_DOMAIN(PBB) (PBB->domain)
 274 #define PBB_DRS(PBB) (PBB->drs)
 275 #define PBB_ORIGINAL(PBB) (PBB->original)
 276 #define PBB_ORIGINAL_SCATTERING(PBB) (PBB->original->scattering)
 277 #define PBB_TRANSFORMED(PBB) (PBB->transformed)
 278 #define PBB_TRANSFORMED_SCATTERING(PBB) (PBB->transformed->scattering)
 279 #define PBB_SAVED(PBB) (PBB->saved)
 280 #define PBB_NB_LOCAL_VARIABLES(PBB) (PBB->transformed->nb_local_variables)
 281 #define PBB_NB_SCATTERING_TRANSFORM(PBB) (PBB->transformed->nb_scattering)
 282
 283 extern void new_poly_bb (scop_p, void *);
 284 extern void free_poly_bb (poly_bb_p);
 285 extern void debug_loop_vec (poly_bb_p);
 286 extern void schedule_to_scattering (poly_bb_p, int);
 287 extern void print_pbb_domain (FILE *, poly_bb_p);
 288 extern void print_pbb (FILE *, poly_bb_p);
 289 extern void print_scop_context (FILE *, scop_p);
 290 extern void print_scop (FILE *, scop_p);
 291 extern void debug_pbb_domain (poly_bb_p);
 292 extern void debug_pbb (poly_bb_p);
 293 extern void print_pdrs (FILE *, poly_bb_p);
 294 extern void debug_pdrs (poly_bb_p);
 295 extern void debug_scop_context (scop_p);
 296 extern void debug_scop (scop_p);
 297 extern void print_scop_params (FILE *, scop_p);
 298 extern void debug_scop_params (scop_p);
 299 extern void print_iteration_domain (FILE *, poly_bb_p);
 300 extern void print_iteration_domains (FILE *, scop_p);
 301 extern void debug_iteration_domain (poly_bb_p);
 302 extern void debug_iteration_domains (scop_p);
 303 extern bool scop_do_interchange (scop_p);
 304 extern bool scop_do_strip_mine (scop_p);
 305 extern void pbb_number_of_iterations (poly_bb_p, graphite_dim_t, Value);
 306
 307 /* The scop that contains the PDR.  */
 308
 309 static inline scop_p pdr_scop (poly_dr_p pdr)
 310 {
 311   return PBB_SCOP (PDR_PBB (pdr));
 312 }
 313
 314 /* Set black box of PBB to BLACKBOX.  */
 315
 316 static inline void
 317 pbb_set_black_box (poly_bb_p pbb, void *black_box)
 318 {
 319   pbb->black_box = black_box;
 320 }
 321
 322 /* The number of loops around PBB: the dimension of the iteration
 323    domain.  */
 324
 325 static inline graphite_dim_t
 326 pbb_dim_iter_domain (const struct poly_bb *pbb)
 327 {
 328   scop_p scop = PBB_SCOP (pbb);
 329   ppl_dimension_type dim;
 330
 331   ppl_Pointset_Powerset_C_Polyhedron_space_dimension (PBB_DOMAIN (pbb), &dim);
 332   return dim - scop_nb_params (scop);
 333 }
 334
 335 /* The number of params defined in PBB.  */
 336
 337 static inline graphite_dim_t
 338 pbb_nb_params (const struct poly_bb *pbb)
 339 {
 340   scop_p scop = PBB_SCOP (pbb);
 341
 342   return scop_nb_params (scop);
 343 }
 344
 345 /* The number of scattering dimensions in the SCATTERING polyhedron
 346    of a PBB for a given SCOP.  */
 347
 348 static inline graphite_dim_t
 349 pbb_nb_scattering_orig (const struct poly_bb *pbb)
 350 {
 351   return 2 * pbb_dim_iter_domain (pbb) + 1;
 352 }
 353
 354 /* The number of scattering dimensions in PBB.  */
 355
 356 static inline graphite_dim_t
 357 pbb_nb_scattering_transform (const struct poly_bb *pbb)
 358 {
 359   return PBB_NB_SCATTERING_TRANSFORM (pbb);
 360 }
 361
 362 /* Returns the number of local variables used in the transformed
 363    scattering polyhedron of PBB.  */
 364
 365 static inline graphite_dim_t
 366 pbb_nb_local_vars (const struct poly_bb *pbb)
 367 {
 368   /* For now we do not have any local variables, as we do not do strip
 369      mining for example.  */
 370   return PBB_NB_LOCAL_VARIABLES (pbb);
 371 }
 372
 373 /* The dimension in the domain of PBB containing the iterator ITER.  */
 374
 375 static inline ppl_dimension_type
 376 pbb_iterator_dim (poly_bb_p pbb ATTRIBUTE_UNUSED, graphite_dim_t iter)
 377 {
 378   return iter;
 379 }
 380
 381 /* The dimension in the domain of PBB containing the iterator ITER.  */
 382
 383 static inline ppl_dimension_type
 384 pbb_parameter_dim (poly_bb_p pbb, graphite_dim_t param)
 385 {
 386   return param
 387     + pbb_dim_iter_domain (pbb);
 388 }
 389
 390 /* The dimension in the original scattering polyhedron of PBB
 391    containing the scattering iterator SCATTER.  */
 392
 393 static inline ppl_dimension_type
 394 psco_scattering_dim (poly_bb_p pbb ATTRIBUTE_UNUSED, graphite_dim_t scatter)
 395 {
 396   gcc_assert (scatter < pbb_nb_scattering_orig (pbb));
 397   return scatter;
 398 }
 399
 400 /* The dimension in the transformed scattering polyhedron of PBB
 401    containing the scattering iterator SCATTER.  */
 402
 403 static inline ppl_dimension_type
 404 psct_scattering_dim (poly_bb_p pbb ATTRIBUTE_UNUSED, graphite_dim_t scatter)
 405 {
 406   gcc_assert (scatter <= pbb_nb_scattering_transform (pbb));
 407   return scatter;
 408 }
 409
 410 ppl_dimension_type psct_scattering_dim_for_loop_depth (poly_bb_p,
 411                                                        graphite_dim_t);
 412
 413 /* The dimension in the transformed scattering polyhedron of PBB of
 414    the local variable LV.  */
 415
 416 static inline ppl_dimension_type
 417 psct_local_var_dim (poly_bb_p pbb, graphite_dim_t lv)
 418 {
 419   gcc_assert (lv <= pbb_nb_local_vars (pbb));
 420   return lv + pbb_nb_scattering_transform (pbb);
 421 }
 422
 423 /* The dimension in the original scattering polyhedron of PBB
 424    containing the loop iterator ITER.  */
 425
 426 static inline ppl_dimension_type
 427 psco_iterator_dim (poly_bb_p pbb, graphite_dim_t iter)
 428 {
 429   gcc_assert (iter < pbb_dim_iter_domain (pbb));
 430   return iter + pbb_nb_scattering_orig (pbb);
 431 }
 432
 433 /* The dimension in the transformed scattering polyhedron of PBB
 434    containing the loop iterator ITER.  */
 435
 436 static inline ppl_dimension_type
 437 psct_iterator_dim (poly_bb_p pbb, graphite_dim_t iter)
 438 {
 439   gcc_assert (iter < pbb_dim_iter_domain (pbb));
 440   return iter
 441     + pbb_nb_scattering_transform (pbb)
 442     + pbb_nb_local_vars (pbb);
 443 }
 444
 445 /* The dimension in the original scattering polyhedron of PBB
 446    containing parameter PARAM.  */
 447
 448 static inline ppl_dimension_type
 449 psco_parameter_dim (poly_bb_p pbb, graphite_dim_t param)
 450 {
 451   gcc_assert (param < pbb_nb_params (pbb));
 452   return param
 453     + pbb_nb_scattering_orig (pbb)
 454     + pbb_dim_iter_domain (pbb);
 455 }
 456
 457 /* The dimension in the transformed scattering polyhedron of PBB
 458    containing parameter PARAM.  */
 459
 460 static inline ppl_dimension_type
 461 psct_parameter_dim (poly_bb_p pbb, graphite_dim_t param)
 462 {
 463   gcc_assert (param < pbb_nb_params (pbb));
 464   return param
 465     + pbb_nb_scattering_transform (pbb)
 466     + pbb_nb_local_vars (pbb)
 467     + pbb_dim_iter_domain (pbb);
 468 }
 469
 470 /* Adds to the transformed scattering polyhedron of PBB a new local
 471    variable and returns its index.  */
 472
 473 static inline graphite_dim_t
 474 psct_add_local_variable (poly_bb_p pbb)
 475 {
 476   graphite_dim_t nlv = pbb_nb_local_vars (pbb);
 477   ppl_dimension_type lv_column = psct_local_var_dim (pbb, nlv);
 478   ppl_insert_dimensions (PBB_TRANSFORMED_SCATTERING (pbb), lv_column, 1);
 479   PBB_NB_LOCAL_VARIABLES (pbb) += 1;
 480   return nlv;
 481 }
 482
 483 /* Adds a dimension to the transformed scattering polyhedron of PBB at
 484    INDEX.  */
 485
 486 static inline void
 487 psct_add_scattering_dimension (poly_bb_p pbb, ppl_dimension_type index)
 488 {
 489   gcc_assert (index < pbb_nb_scattering_transform (pbb));
 490
 491   ppl_insert_dimensions (PBB_TRANSFORMED_SCATTERING (pbb), index, 1);
 492   PBB_NB_SCATTERING_TRANSFORM (pbb) += 1;
 493 }
 494
 495 /* A SCOP is a Static Control Part of the program, simple enough to be
 496    represented in polyhedral form.  */
 497 struct scop
 498 {
 499   /* A SCOP is defined as a SESE region.  */
 500   void *region;
 501
 502   /* Number of parameters in SCoP.  */
 503   graphite_dim_t nb_params;
 504
 505   /* All the basic blocks in this scop that contain memory references
 506      and that will be represented as statements in the polyhedral
 507      representation.  */
 508   VEC (poly_bb_p, heap) *bbs;
 509
 510   /* Data dependence graph for this SCoP.  */
 511   struct graph *dep_graph;
 512
 513   /* The context describes known restrictions concerning the parameters
 514      and relations in between the parameters.
 515
 516   void f (int8_t a, uint_16_t b) {
 517     c = 2 a + b;
 518     ...
 519   }
 520
 521   Here we can add these restrictions to the context:
 522
 523   -128 >= a >= 127
 524      0 >= b >= 65,535
 525      c = 2a + b  */
 526   ppl_Pointset_Powerset_C_Polyhedron_t context;
 527
 528   /* A hashtable of the original pairs of dependent data references.
 529      For each pair of dependent data references, the dependence
 530      polyhedron is stored also.  */
 531   htab_t original_pdr_pairs;
 532 };
 533
 534 #define SCOP_BBS(S) (S->bbs)
 535 #define SCOP_REGION(S) ((sese) S->region)
 536 #define SCOP_DEP_GRAPH(S) (S->dep_graph)
 537 #define SCOP_CONTEXT(S) (S->context)
 538 #define SCOP_ORIGINAL_PDR_PAIRS(S) (S->original_pdr_pairs)
 539
 540 extern scop_p new_scop (void *);
 541 extern void free_scop (scop_p);
 542 extern void free_scops (VEC (scop_p, heap) *);
 543 extern void print_generated_program (FILE *, scop_p);
 544 extern void debug_generated_program (scop_p);
 545 extern void print_scattering_function (FILE *, poly_bb_p);
 546 extern void print_scattering_functions (FILE *, scop_p);
 547 extern void debug_scattering_function (poly_bb_p);
 548 extern void debug_scattering_functions (scop_p);
 549 extern int scop_max_loop_depth (scop_p);
 550 extern int unify_scattering_dimensions (scop_p);
 551 extern bool apply_poly_transforms (scop_p);
 552 extern bool graphite_legal_transform (scop_p);
 553
 554 /* Set the region of SCOP to REGION.  */
 555
 556 static inline void
 557 scop_set_region (scop_p scop, void *region)
 558 {
 559   scop->region = region;
 560 }
 561
 562 /* Returns the number of parameters for SCOP.  */
 563
 564 static inline graphite_dim_t
 565 scop_nb_params (scop_p scop)
 566 {
 567   return scop->nb_params;
 568 }
 569
 570 /* Set the number of params of SCOP to NB_PARAMS.  */
 571
 572 static inline void
 573 scop_set_nb_params (scop_p scop, graphite_dim_t nb_params)
 574 {
 575   scop->nb_params = nb_params;
 576 }
 577
 578 /* Allocates a new empty poly_scattering structure.  */
 579
 580 static inline poly_scattering_p
 581 poly_scattering_new (void)
 582 {
 583   poly_scattering_p res = XNEW (struct poly_scattering);
 584
 585   res->scattering = NULL;
 586   res->nb_local_variables = 0;
 587   res->nb_scattering = 0;
 588   return res;
 589 }
 590
 591 /* Free a poly_scattering structure.  */
 592
 593 static inline void
 594 poly_scattering_free (poly_scattering_p s)
 595 {
 596   ppl_delete_Polyhedron (s->scattering);
 597   free (s);
 598 }
 599
 600 /* Copies S and return a new scattering.  */
 601
 602 static inline poly_scattering_p
 603 poly_scattering_copy (poly_scattering_p s)
 604 {
 605   poly_scattering_p res = poly_scattering_new ();
 606
 607   ppl_new_C_Polyhedron_from_C_Polyhedron (&(res->scattering), s->scattering);
 608   res->nb_local_variables = s->nb_local_variables;
 609   res->nb_scattering = s->nb_scattering;
 610   return res;
 611 }
 612
 613 /* Saves the transformed scattering of PBB.  */
 614
 615 static inline void
 616 store_scattering_pbb (poly_bb_p pbb)
 617 {
 618   gcc_assert (PBB_TRANSFORMED (pbb));
 619
 620   if (PBB_SAVED (pbb))
 621     poly_scattering_free (PBB_SAVED (pbb));
 622
 623   PBB_SAVED (pbb) = poly_scattering_copy (PBB_TRANSFORMED (pbb));
 624 }
 625
 626 /* Saves the scattering for all the pbbs in the SCOP.  */
 627
 628 static inline void
 629 store_scattering (scop_p scop)
 630 {
 631   int i;
 632   poly_bb_p pbb;
 633
 634   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 635     store_scattering_pbb (pbb);
 636 }
 637
 638 /* Restores the scattering of PBB.  */
 639
 640 static inline void
 641 restore_scattering_pbb (poly_bb_p pbb)
 642 {
 643   gcc_assert (PBB_SAVED (pbb));
 644
 645   poly_scattering_free (PBB_TRANSFORMED (pbb));
 646   PBB_TRANSFORMED (pbb) = poly_scattering_copy (PBB_SAVED (pbb));
 647 }
 648
 649 /* Restores the scattering for all the pbbs in the SCOP.  */
 650
 651 static inline void
 652 restore_scattering (scop_p scop)
 653 {
 654   int i;
 655   poly_bb_p pbb;
 656
 657   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 658     restore_scattering_pbb (pbb);
 659 }
 660
 661 #endif