gcc/graphite-poly.c

   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 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "ggc.h"
  26 #include "tree.h"
  27 #include "rtl.h"
  28 #include "output.h"
  29 #include "basic-block.h"
  30 #include "diagnostic.h"
  31 #include "tree-flow.h"
  32 #include "toplev.h"
  33 #include "tree-dump.h"
  34 #include "timevar.h"
  35 #include "cfgloop.h"
  36 #include "tree-chrec.h"
  37 #include "tree-data-ref.h"
  38 #include "tree-scalar-evolution.h"
  39 #include "tree-pass.h"
  40 #include "domwalk.h"
  41 #include "value-prof.h"
  42 #include "pointer-set.h"
  43 #include "gimple.h"
  44 #include "params.h"
  45
  46 #ifdef HAVE_cloog
  47 #include "cloog/cloog.h"
  48 #include "ppl_c.h"
  49 #include "sese.h"
  50 #include "graphite-ppl.h"
  51 #include "graphite.h"
  52 #include "graphite-poly.h"
  53 #include "graphite-dependences.h"
  54
  55 /* Return the maximal loop depth in SCOP.  */
  56
  57 int
  58 scop_max_loop_depth (scop_p scop)
  59 {
  60   int i;
  61   poly_bb_p pbb;
  62   int max_nb_loops = 0;
  63
  64   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
  65     {
  66       int nb_loops = pbb_dim_iter_domain (pbb);
  67       if (max_nb_loops < nb_loops)
  68         max_nb_loops = nb_loops;
  69     }
  70
  71   return max_nb_loops;
  72 }
  73
  74 /* Extend the scattering matrix of PBB to MAX_SCATTERING scattering
  75    dimensions.  */
  76
  77 static void
  78 extend_scattering (poly_bb_p pbb, int max_scattering)
  79 {
  80   ppl_dimension_type nb_old_dims, nb_new_dims;
  81   int nb_added_dims, i;
  82   ppl_Coefficient_t coef;
  83   Value one;
  84
  85   nb_added_dims = max_scattering - pbb_nb_scattering_transform (pbb);
  86   value_init (one);
  87   value_set_si (one, 1);
  88   ppl_new_Coefficient (&coef);
  89   ppl_assign_Coefficient_from_mpz_t (coef, one);
  90
  91   gcc_assert (nb_added_dims >= 0);
  92
  93   nb_old_dims = pbb_nb_scattering_transform (pbb) + pbb_dim_iter_domain (pbb)
  94     + scop_nb_params (PBB_SCOP (pbb));
  95   nb_new_dims = nb_old_dims + nb_added_dims;
  96
  97   ppl_insert_dimensions (PBB_TRANSFORMED_SCATTERING (pbb),
  98                          pbb_nb_scattering_transform (pbb), nb_added_dims);
  99   PBB_NB_SCATTERING_TRANSFORM (pbb) += nb_added_dims;
 100
 101   /* Add identity matrix for the added dimensions.  */
 102   for (i = max_scattering - nb_added_dims; i < max_scattering; i++)
 103     {
 104       ppl_Constraint_t cstr;
 105       ppl_Linear_Expression_t expr;
 106
 107       ppl_new_Linear_Expression_with_dimension (&expr, nb_new_dims);
 108       ppl_Linear_Expression_add_to_coefficient (expr, i, coef);
 109       ppl_new_Constraint (&cstr, expr, PPL_CONSTRAINT_TYPE_EQUAL);
 110       ppl_Polyhedron_add_constraint (PBB_TRANSFORMED_SCATTERING (pbb), cstr);
 111       ppl_delete_Constraint (cstr);
 112       ppl_delete_Linear_Expression (expr);
 113     }
 114
 115   ppl_delete_Coefficient (coef);
 116   value_clear (one);
 117 }
 118
 119 /* All scattering matrices in SCOP will have the same number of scattering
 120    dimensions.  */
 121
 122 int
 123 unify_scattering_dimensions (scop_p scop)
 124 {
 125   int i;
 126   poly_bb_p pbb;
 127   graphite_dim_t max_scattering = 0;
 128
 129   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 130     max_scattering = MAX (pbb_nb_scattering_transform (pbb), max_scattering);
 131
 132   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 133     extend_scattering (pbb, max_scattering);
 134
 135   return max_scattering;
 136 }
 137
 138 /* Prints to FILE the scattering function of PBB.  */
 139
 140 void
 141 print_scattering_function (FILE *file, poly_bb_p pbb)
 142 {
 143   graphite_dim_t i;
 144
 145   if (!PBB_TRANSFORMED (pbb))
 146     return;
 147
 148   fprintf (file, "scattering bb_%d (\n", pbb_index (pbb));
 149   fprintf (file, "#  eq");
 150
 151   for (i = 0; i < pbb_nb_scattering_transform (pbb); i++)
 152     fprintf (file, "     s%d", (int) i);
 153
 154   for (i = 0; i < pbb_nb_local_vars (pbb); i++)
 155     fprintf (file, "    lv%d", (int) i);
 156
 157   for (i = 0; i < pbb_dim_iter_domain (pbb); i++)
 158     fprintf (file, "     i%d", (int) i);
 159
 160   for (i = 0; i < pbb_nb_params (pbb); i++)
 161     fprintf (file, "     p%d", (int) i);
 162
 163   fprintf (file, "    cst\n");
 164
 165   ppl_print_polyhedron_matrix (file, PBB_TRANSFORMED_SCATTERING (pbb));
 166
 167   fprintf (file, ")\n");
 168 }
 169
 170 /* Prints to FILE the iteration domain of PBB.  */
 171
 172 void
 173 print_iteration_domain (FILE *file, poly_bb_p pbb)
 174 {
 175   print_pbb_domain (file, pbb);
 176 }
 177
 178 /* Prints to FILE the scattering functions of every PBB of SCOP.  */
 179
 180 void
 181 print_scattering_functions (FILE *file, scop_p scop)
 182 {
 183   int i;
 184   poly_bb_p pbb;
 185
 186   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 187     print_scattering_function (file, pbb);
 188 }
 189
 190 /* Prints to FILE the iteration domains of every PBB of SCOP.  */
 191
 192 void
 193 print_iteration_domains (FILE *file, scop_p scop)
 194 {
 195   int i;
 196   poly_bb_p pbb;
 197
 198   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 199     print_iteration_domain (file, pbb);
 200 }
 201
 202 /* Prints to STDERR the scattering function of PBB.  */
 203
 204 void
 205 debug_scattering_function (poly_bb_p pbb)
 206 {
 207   print_scattering_function (stderr, pbb);
 208 }
 209
 210 /* Prints to STDERR the iteration domain of PBB.  */
 211
 212 void
 213 debug_iteration_domain (poly_bb_p pbb)
 214 {
 215   print_iteration_domain (stderr, pbb);
 216 }
 217
 218 /* Prints to STDERR the scattering functions of every PBB of SCOP.  */
 219
 220 void
 221 debug_scattering_functions (scop_p scop)
 222 {
 223   print_scattering_functions (stderr, scop);
 224 }
 225
 226 /* Prints to STDERR the iteration domains of every PBB of SCOP.  */
 227
 228 void
 229 debug_iteration_domains (scop_p scop)
 230 {
 231   print_iteration_domains (stderr, scop);
 232 }
 233
 234 /* Apply graphite transformations to all the basic blocks of SCOP.  */
 235
 236 bool
 237 apply_poly_transforms (scop_p scop)
 238 {
 239   bool transform_done = false;
 240
 241   /* Generate code even if we did not apply any real transformation.
 242      This also allows to check the performance for the identity
 243      transformation: GIMPLE -> GRAPHITE -> GIMPLE
 244      Keep in mind that CLooG optimizes in control, so the loop structure
 245      may change, even if we only use -fgraphite-identity.  */
 246   if (flag_graphite_identity)
 247     transform_done = true;
 248
 249   if (flag_loop_parallelize_all)
 250     transform_done = true;
 251
 252   if (flag_loop_block)
 253     gcc_unreachable (); /* Not yet supported.  */
 254
 255   if (flag_loop_strip_mine)
 256     transform_done |= scop_do_strip_mine (scop);
 257
 258   if (flag_loop_interchange)
 259     transform_done |= scop_do_interchange (scop);
 260
 261   return transform_done;
 262 }
 263
 264 /* Returns true when it PDR1 is a duplicate of PDR2: same PBB, and
 265    their ACCESSES, TYPE, and NB_SUBSCRIPTS are the same.  */
 266
 267 static inline bool
 268 can_collapse_pdrs (poly_dr_p pdr1, poly_dr_p pdr2)
 269 {
 270   bool res;
 271   ppl_Pointset_Powerset_C_Polyhedron_t af1, af2, diff;
 272
 273   if (PDR_PBB (pdr1) != PDR_PBB (pdr2)
 274       || PDR_NB_SUBSCRIPTS (pdr1) != PDR_NB_SUBSCRIPTS (pdr2)
 275       || PDR_TYPE (pdr1) != PDR_TYPE (pdr2))
 276     return false;
 277
 278   af1 = PDR_ACCESSES (pdr1);
 279   af2 = PDR_ACCESSES (pdr2);
 280   ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
 281     (&diff, af1);
 282   ppl_Pointset_Powerset_C_Polyhedron_difference_assign (diff, af2);
 283
 284   res = ppl_Pointset_Powerset_C_Polyhedron_is_empty (diff);
 285   ppl_delete_Pointset_Powerset_C_Polyhedron (diff);
 286   return res;
 287 }
 288
 289 /* Removes duplicated data references in PBB.  */
 290
 291 void
 292 pbb_remove_duplicate_pdrs (poly_bb_p pbb)
 293 {
 294   int i, j;
 295   poly_dr_p pdr1, pdr2;
 296   unsigned n = VEC_length (poly_dr_p, PBB_DRS (pbb));
 297   VEC (poly_dr_p, heap) *collapsed = VEC_alloc (poly_dr_p, heap, n);
 298
 299   for (i = 0; VEC_iterate (poly_dr_p, PBB_DRS (pbb), i, pdr1); i++)
 300     for (j = 0; VEC_iterate (poly_dr_p, collapsed, j, pdr2); j++)
 301       if (!can_collapse_pdrs (pdr1, pdr2))
 302         VEC_quick_push (poly_dr_p, collapsed, pdr1);
 303 }
 304
 305 /* Create a new polyhedral data reference and add it to PBB.  It is
 306    defined by its ACCESSES, its TYPE, and the number of subscripts
 307    NB_SUBSCRIPTS.  */
 308
 309 void
 310 new_poly_dr (poly_bb_p pbb, int dr_base_object_set,
 311              ppl_Pointset_Powerset_C_Polyhedron_t accesses,
 312              enum poly_dr_type type, void *cdr, graphite_dim_t nb_subscripts)
 313 {
 314   static int id = 0;
 315   poly_dr_p pdr = XNEW (struct poly_dr);
 316
 317   PDR_ID (pdr) = id++;
 318   PDR_BASE_OBJECT_SET (pdr) = dr_base_object_set;
 319   PDR_NB_REFS (pdr) = 1;
 320   PDR_PBB (pdr) = pbb;
 321   PDR_ACCESSES (pdr) = accesses;
 322   PDR_TYPE (pdr) = type;
 323   PDR_CDR (pdr) = cdr;
 324   PDR_NB_SUBSCRIPTS (pdr) = nb_subscripts;
 325   VEC_safe_push (poly_dr_p, heap, PBB_DRS (pbb), pdr);
 326 }
 327
 328 /* Free polyhedral data reference PDR.  */
 329
 330 void
 331 free_poly_dr (poly_dr_p pdr)
 332 {
 333   ppl_delete_Pointset_Powerset_C_Polyhedron (PDR_ACCESSES (pdr));
 334   XDELETE (pdr);
 335 }
 336
 337 /* Create a new polyhedral black box.  */
 338
 339 void
 340 new_poly_bb (scop_p scop, void *black_box, bool reduction)
 341 {
 342   poly_bb_p pbb = XNEW (struct poly_bb);
 343
 344   PBB_DOMAIN (pbb) = NULL;
 345   PBB_SCOP (pbb) = scop;
 346   pbb_set_black_box (pbb, black_box);
 347   PBB_TRANSFORMED (pbb) = NULL;
 348   PBB_SAVED (pbb) = NULL;
 349   PBB_ORIGINAL (pbb) = NULL;
 350   PBB_DRS (pbb) = VEC_alloc (poly_dr_p, heap, 3);
 351   PBB_IS_REDUCTION (pbb) = reduction;
 352   VEC_safe_push (poly_bb_p, heap, SCOP_BBS (scop), pbb);
 353 }
 354
 355 /* Free polyhedral black box.  */
 356
 357 void
 358 free_poly_bb (poly_bb_p pbb)
 359 {
 360   int i;
 361   poly_dr_p pdr;
 362
 363   ppl_delete_Pointset_Powerset_C_Polyhedron (PBB_DOMAIN (pbb));
 364
 365   if (PBB_TRANSFORMED (pbb))
 366     poly_scattering_free (PBB_TRANSFORMED (pbb));
 367
 368   if (PBB_SAVED (pbb))
 369     poly_scattering_free (PBB_SAVED (pbb));
 370
 371   if (PBB_ORIGINAL (pbb))
 372     poly_scattering_free (PBB_ORIGINAL (pbb));
 373
 374   if (PBB_DRS (pbb))
 375     for (i = 0; VEC_iterate (poly_dr_p, PBB_DRS (pbb), i, pdr); i++)
 376       free_poly_dr (pdr);
 377
 378   VEC_free (poly_dr_p, heap, PBB_DRS (pbb));
 379   XDELETE (pbb);
 380 }
 381
 382 static void
 383 print_pdr_access_layout (FILE *file, poly_dr_p pdr)
 384 {
 385   graphite_dim_t i;
 386
 387   fprintf (file, "#  eq");
 388
 389   for (i = 0; i < pdr_dim_iter_domain (pdr); i++)
 390     fprintf (file, "     i%d", (int) i);
 391
 392   for (i = 0; i < pdr_nb_params (pdr); i++)
 393     fprintf (file, "     p%d", (int) i);
 394
 395   fprintf (file, "  alias");
 396
 397   for (i = 0; i < PDR_NB_SUBSCRIPTS (pdr); i++)
 398     fprintf (file, "   sub%d", (int) i);
 399
 400   fprintf (file, "    cst\n");
 401 }
 402
 403 /* Prints to FILE the polyhedral data reference PDR.  */
 404
 405 void
 406 print_pdr (FILE *file, poly_dr_p pdr)
 407 {
 408   fprintf (file, "pdr_%d (", PDR_ID (pdr));
 409
 410   switch (PDR_TYPE (pdr))
 411     {
 412     case PDR_READ:
 413       fprintf (file, "read \n");
 414       break;
 415
 416     case PDR_WRITE:
 417       fprintf (file, "write \n");
 418       break;
 419
 420     case PDR_MAY_WRITE:
 421       fprintf (file, "may_write \n");
 422       break;
 423
 424     default:
 425       gcc_unreachable ();
 426     }
 427
 428   dump_data_reference (file, (data_reference_p) PDR_CDR (pdr));
 429
 430   fprintf (file, "data accesses (\n");
 431   print_pdr_access_layout (file, pdr);
 432   ppl_print_powerset_matrix (file, PDR_ACCESSES (pdr));
 433   fprintf (file, ")\n");
 434
 435   fprintf (file, ")\n");
 436 }
 437
 438 /* Prints to STDERR the polyhedral data reference PDR.  */
 439
 440 void
 441 debug_pdr (poly_dr_p pdr)
 442 {
 443   print_pdr (stderr, pdr);
 444 }
 445
 446 /* Creates a new SCOP containing REGION.  */
 447
 448 scop_p
 449 new_scop (void *region)
 450 {
 451   scop_p scop = XNEW (struct scop);
 452
 453   SCOP_CONTEXT (scop) = NULL;
 454   scop_set_region (scop, region);
 455   SCOP_BBS (scop) = VEC_alloc (poly_bb_p, heap, 3);
 456   SCOP_ORIGINAL_PDDRS (scop) = htab_create (10, hash_poly_ddr_p,
 457                                             eq_poly_ddr_p, free_poly_ddr);
 458   return scop;
 459 }
 460
 461 /* Deletes SCOP.  */
 462
 463 void
 464 free_scop (scop_p scop)
 465 {
 466   int i;
 467   poly_bb_p pbb;
 468
 469   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 470     free_poly_bb (pbb);
 471
 472   VEC_free (poly_bb_p, heap, SCOP_BBS (scop));
 473
 474   if (SCOP_CONTEXT (scop))
 475     ppl_delete_Pointset_Powerset_C_Polyhedron (SCOP_CONTEXT (scop));
 476
 477   htab_delete (SCOP_ORIGINAL_PDDRS (scop));
 478   XDELETE (scop);
 479 }
 480
 481 /* Print to FILE the domain of PBB.  */
 482
 483 void
 484 print_pbb_domain (FILE *file, poly_bb_p pbb)
 485 {
 486   graphite_dim_t i;
 487   gimple_bb_p gbb = PBB_BLACK_BOX (pbb);
 488
 489   if (!PBB_DOMAIN (pbb))
 490     return;
 491
 492   fprintf (file, "domains bb_%d (\n", GBB_BB (gbb)->index);
 493   fprintf (file, "#  eq");
 494
 495   for (i = 0; i < pbb_dim_iter_domain (pbb); i++)
 496     fprintf (file, "     i%d", (int) i);
 497
 498   for (i = 0; i < pbb_nb_params (pbb); i++)
 499     fprintf (file, "     p%d", (int) i);
 500
 501   fprintf (file, "    cst\n");
 502
 503   if (PBB_DOMAIN (pbb))
 504     ppl_print_powerset_matrix (file, PBB_DOMAIN (pbb));
 505
 506   fprintf (file, ")\n");
 507 }
 508
 509 /* Dump the cases of a graphite basic block GBB on FILE.  */
 510
 511 static void
 512 dump_gbb_cases (FILE *file, gimple_bb_p gbb)
 513 {
 514   int i;
 515   gimple stmt;
 516   VEC (gimple, heap) *cases;
 517
 518   if (!gbb)
 519     return;
 520
 521   cases = GBB_CONDITION_CASES (gbb);
 522   if (VEC_empty (gimple, cases))
 523     return;
 524
 525   fprintf (file, "cases bb_%d (", GBB_BB (gbb)->index);
 526
 527   for (i = 0; VEC_iterate (gimple, cases, i, stmt); i++)
 528     print_gimple_stmt (file, stmt, 0, 0);
 529
 530   fprintf (file, ")\n");
 531 }
 532
 533 /* Dump conditions of a graphite basic block GBB on FILE.  */
 534
 535 static void
 536 dump_gbb_conditions (FILE *file, gimple_bb_p gbb)
 537 {
 538   int i;
 539   gimple stmt;
 540   VEC (gimple, heap) *conditions;
 541
 542   if (!gbb)
 543     return;
 544
 545   conditions = GBB_CONDITIONS (gbb);
 546   if (VEC_empty (gimple, conditions))
 547     return;
 548
 549   fprintf (file, "conditions bb_%d (", GBB_BB (gbb)->index);
 550
 551   for (i = 0; VEC_iterate (gimple, conditions, i, stmt); i++)
 552     print_gimple_stmt (file, stmt, 0, 0);
 553
 554   fprintf (file, ")\n");
 555 }
 556
 557 /* Print to FILE all the data references of PBB.  */
 558
 559 void
 560 print_pdrs (FILE *file, poly_bb_p pbb)
 561 {
 562   int i;
 563   poly_dr_p pdr;
 564
 565   for (i = 0; VEC_iterate (poly_dr_p, PBB_DRS (pbb), i, pdr); i++)
 566     print_pdr (file, pdr);
 567 }
 568
 569 /* Print to STDERR all the data references of PBB.  */
 570
 571 void
 572 debug_pdrs (poly_bb_p pbb)
 573 {
 574   print_pdrs (stderr, pbb);
 575 }
 576
 577 /* Print to FILE the domain and scattering function of PBB.  */
 578
 579 void
 580 print_pbb (FILE *file, poly_bb_p pbb)
 581 {
 582   fprintf (file, "pbb_%d (\n", pbb_index (pbb));
 583   dump_gbb_conditions (file, PBB_BLACK_BOX (pbb));
 584   dump_gbb_cases (file, PBB_BLACK_BOX (pbb));
 585   print_pdrs (file, pbb);
 586   print_pbb_domain (file, pbb);
 587   print_scattering_function (file, pbb);
 588   fprintf (file, ")\n");
 589 }
 590
 591 /* Print to FILE the parameters of SCOP.  */
 592
 593 void
 594 print_scop_params (FILE *file, scop_p scop)
 595 {
 596   int i;
 597   tree t;
 598
 599   fprintf (file, "parameters (\n");
 600   for (i = 0; VEC_iterate (tree, SESE_PARAMS (SCOP_REGION (scop)), i, t); i++)
 601     {
 602       fprintf (file, "p_%d -> ", i);
 603       print_generic_expr (file, t, 0);
 604       fprintf (file, "\n");
 605     }
 606   fprintf (file, ")\n");
 607 }
 608
 609 /* Print to FILE the context of SCoP.  */
 610 void
 611 print_scop_context (FILE *file, scop_p scop)
 612 {
 613   graphite_dim_t i;
 614
 615   fprintf (file, "context (\n");
 616   fprintf (file, "#  eq");
 617
 618   for (i = 0; i < scop_nb_params (scop); i++)
 619     fprintf (file, "     p%d", (int) i);
 620
 621   fprintf (file, "    cst\n");
 622
 623   if (SCOP_CONTEXT (scop))
 624     ppl_print_powerset_matrix (file, SCOP_CONTEXT (scop));
 625
 626   fprintf (file, ")\n");
 627 }
 628
 629 /* Print to FILE the SCOP.  */
 630
 631 void
 632 print_scop (FILE *file, scop_p scop)
 633 {
 634   int i;
 635   poly_bb_p pbb;
 636
 637   fprintf (file, "scop (\n");
 638   print_scop_params (file, scop);
 639   print_scop_context (file, scop);
 640
 641   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
 642     print_pbb (file, pbb);
 643
 644   fprintf (file, ")\n");
 645
 646   fprintf (file, "original_lst (\n");
 647   print_lst (file, SCOP_ORIGINAL_SCHEDULE (scop), 0);
 648   fprintf (file, ")\n");
 649
 650   fprintf (file, "transformed_lst (\n");
 651   print_lst (file, SCOP_TRANSFORMED_SCHEDULE (scop), 0);
 652   fprintf (file, ")\n");
 653 }
 654
 655 /* Print to STDERR the domain of PBB.  */
 656
 657 void
 658 debug_pbb_domain (poly_bb_p pbb)
 659 {
 660   print_pbb_domain (stderr, pbb);
 661 }
 662
 663 /* Print to FILE the domain and scattering function of PBB.  */
 664
 665 void
 666 debug_pbb (poly_bb_p pbb)
 667 {
 668   print_pbb (stderr, pbb);
 669 }
 670
 671 /* Print to STDERR the context of SCOP.  */
 672
 673 void
 674 debug_scop_context (scop_p scop)
 675 {
 676   print_scop_context (stderr, scop);
 677 }
 678
 679 /* Print to STDERR the SCOP.  */
 680
 681 void
 682 debug_scop (scop_p scop)
 683 {
 684   print_scop (stderr, scop);
 685 }
 686
 687 /* Print to STDERR the parameters of SCOP.  */
 688
 689 void
 690 debug_scop_params (scop_p scop)
 691 {
 692   print_scop_params (stderr, scop);
 693 }
 694
 695
 696 /* The dimension in the transformed scattering polyhedron of PBB
 697    containing the scattering iterator for the loop at depth LOOP_DEPTH.  */
 698
 699 ppl_dimension_type
 700 psct_scattering_dim_for_loop_depth (poly_bb_p pbb, graphite_dim_t loop_depth)
 701 {
 702   ppl_const_Constraint_System_t pcs;
 703   ppl_Constraint_System_const_iterator_t cit, cend;
 704   ppl_const_Constraint_t cstr;
 705   ppl_Polyhedron_t ph = PBB_TRANSFORMED_SCATTERING (pbb);
 706   ppl_dimension_type iter = psct_iterator_dim (pbb, loop_depth);
 707   ppl_Linear_Expression_t expr;
 708   ppl_Coefficient_t coef;
 709   Value val;
 710   graphite_dim_t i;
 711
 712   value_init (val);
 713   ppl_new_Coefficient (&coef);
 714   ppl_Polyhedron_get_constraints (ph, &pcs);
 715   ppl_new_Constraint_System_const_iterator (&cit);
 716   ppl_new_Constraint_System_const_iterator (&cend);
 717
 718   for (ppl_Constraint_System_begin (pcs, cit),
 719          ppl_Constraint_System_end (pcs, cend);
 720        !ppl_Constraint_System_const_iterator_equal_test (cit, cend);
 721        ppl_Constraint_System_const_iterator_increment (cit))
 722     {
 723       ppl_Constraint_System_const_iterator_dereference (cit, &cstr);
 724       ppl_new_Linear_Expression_from_Constraint (&expr, cstr);
 725       ppl_Linear_Expression_coefficient (expr, iter, coef);
 726       ppl_Coefficient_to_mpz_t (coef, val);
 727
 728       if (value_zero_p (val))
 729         {
 730           ppl_delete_Linear_Expression (expr);
 731           continue;
 732         }
 733
 734       for (i = 0; i < pbb_nb_scattering_transform (pbb); i++)
 735         {
 736           ppl_dimension_type scatter = psct_scattering_dim (pbb, i);
 737
 738           ppl_Linear_Expression_coefficient (expr, scatter, coef);
 739           ppl_Coefficient_to_mpz_t (coef, val);
 740
 741           if (value_notzero_p (val))
 742             {
 743               value_clear (val);
 744               ppl_delete_Linear_Expression (expr);
 745               ppl_delete_Coefficient (coef);
 746               ppl_delete_Constraint_System_const_iterator (cit);
 747               ppl_delete_Constraint_System_const_iterator (cend);
 748
 749               return scatter;
 750             }
 751         }
 752     }
 753
 754   gcc_unreachable ();
 755 }
 756
 757 /* Returns the number of iterations NITER of the loop around PBB at
 758    depth LOOP_DEPTH.  */
 759
 760 void
 761 pbb_number_of_iterations (poly_bb_p pbb,
 762                           graphite_dim_t loop_depth,
 763                           Value niter)
 764 {
 765   ppl_Linear_Expression_t le;
 766   ppl_dimension_type dim;
 767
 768   ppl_Pointset_Powerset_C_Polyhedron_space_dimension (PBB_DOMAIN (pbb), &dim);
 769   ppl_new_Linear_Expression_with_dimension (&le, dim);
 770   ppl_set_coef (le, pbb_iterator_dim (pbb, loop_depth), 1);
 771   value_set_si (niter, -1);
 772   ppl_max_for_le_pointset (PBB_DOMAIN (pbb), le, niter);
 773   ppl_delete_Linear_Expression (le);
 774 }
 775
 776 /* Returns the number of iterations NITER of the loop around PBB at
 777    time(scattering) dimension TIME_DEPTH.  */
 778
 779 void
 780 pbb_number_of_iterations_at_time (poly_bb_p pbb,
 781                                   graphite_dim_t time_depth,
 782                                   Value niter)
 783 {
 784   ppl_Pointset_Powerset_C_Polyhedron_t ext_domain, sctr;
 785   ppl_Linear_Expression_t le;
 786   ppl_dimension_type dim;
 787
 788   value_set_si (niter, -1);
 789
 790   /* Takes together domain and scattering polyhedrons, and composes
 791      them into the bigger polyhedron that has the following format:
 792      t0..t_{n-1} | l0..l_{nlcl-1} | i0..i_{niter-1} | g0..g_{nparm-1}.
 793      t0..t_{n-1} are time dimensions (scattering dimensions)
 794      l0..l_{nclc-1} are local variables in scatterin function
 795      i0..i_{niter-1} are original iteration variables
 796      g0..g_{nparam-1} are global parameters.  */
 797
 798   ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
 799     (&ext_domain, PBB_DOMAIN (pbb));
 800   ppl_insert_dimensions_pointset (ext_domain, 0,
 801                                   pbb_nb_scattering_transform (pbb)
 802                                   + pbb_nb_local_vars (pbb));
 803   ppl_new_Pointset_Powerset_C_Polyhedron_from_C_Polyhedron (&sctr,
 804       PBB_TRANSFORMED_SCATTERING (pbb));
 805   ppl_Pointset_Powerset_C_Polyhedron_intersection_assign (sctr, ext_domain);
 806
 807   ppl_Pointset_Powerset_C_Polyhedron_space_dimension (sctr, &dim);
 808   ppl_new_Linear_Expression_with_dimension (&le, dim);
 809   ppl_set_coef (le, time_depth, 1);
 810   ppl_max_for_le_pointset (sctr, le, niter);
 811
 812   ppl_delete_Linear_Expression (le);
 813   ppl_delete_Pointset_Powerset_C_Polyhedron (sctr);
 814   ppl_delete_Pointset_Powerset_C_Polyhedron (ext_domain);
 815 }
 816
 817 /* Translates LOOP to LST.  */
 818
 819 static lst_p
 820 loop_to_lst (loop_p loop, VEC (poly_bb_p, heap) *bbs, int *i)
 821 {
 822   poly_bb_p pbb;
 823   VEC (lst_p, heap) *seq = VEC_alloc (lst_p, heap, 5);
 824
 825   for (; VEC_iterate (poly_bb_p, bbs, *i, pbb); (*i)++)
 826     {
 827       lst_p stmt;
 828       basic_block bb = GBB_BB (PBB_BLACK_BOX (pbb));
 829
 830       if (bb->loop_father == loop)
 831         stmt = new_lst_stmt (pbb);
 832       else
 833         {
 834           if (flow_bb_inside_loop_p (loop, bb))
 835             stmt = loop_to_lst (loop->inner, bbs, i);
 836           else
 837             {
 838               loop_p next = loop;
 839
 840               while ((next = next->next)
 841                      && !flow_bb_inside_loop_p (next, bb));
 842
 843               if (!next)
 844                 return new_lst_loop (seq);
 845
 846               stmt = loop_to_lst (next, bbs, i);
 847             }
 848         }
 849
 850       VEC_safe_push (lst_p, heap, seq, stmt);
 851     }
 852
 853   return new_lst_loop (seq);
 854 }
 855
 856 /* Reads the original scattering of the SCOP and returns an LST
 857    representing it.  */
 858
 859 void
 860 scop_to_lst (scop_p scop)
 861 {
 862   poly_bb_p pbb = VEC_index (poly_bb_p, SCOP_BBS (scop), 0);
 863   loop_p loop = outermost_loop_in_sese (SCOP_REGION (scop), GBB_BB (PBB_BLACK_BOX (pbb)));
 864   int i = 0;
 865
 866   SCOP_ORIGINAL_SCHEDULE (scop) = loop_to_lst (loop, SCOP_BBS (scop), &i);
 867   SCOP_TRANSFORMED_SCHEDULE (scop) = copy_lst (SCOP_ORIGINAL_SCHEDULE (scop));
 868 }
 869
 870 /* Print LST to FILE with INDENT spaces of indentation.  */
 871
 872 void
 873 print_lst (FILE *file, lst_p lst, int indent)
 874 {
 875   if (!lst)
 876     return;
 877
 878   indent_to (file, indent);
 879
 880   if (LST_LOOP_P (lst))
 881     {
 882       int i;
 883       lst_p l;
 884
 885       fprintf (file, "%d (loop", lst_dewey_number (lst));
 886
 887       for (i = 0; VEC_iterate (lst_p, LST_SEQ (lst), i, l); i++)
 888         print_lst (file, l, indent + 2);
 889
 890       fprintf (file, ")");
 891     }
 892   else
 893     fprintf (file, "%d stmt_%d", lst_dewey_number (lst), pbb_index (LST_PBB (lst)));
 894 }
 895
 896 /* Print LST to STDERR.  */
 897
 898 void
 899 debug_lst (lst_p lst)
 900 {
 901   print_lst (stderr, lst, 0);
 902 }
 903
 904 #endif
 905