gcc/graphite-poly.c

   1 /* Graphite polyhedral representation.
   2    Copyright (C) 2009-2015 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 #include "config.h"
  23
  24 #ifdef HAVE_isl
  25 /* Workaround for GMP 5.1.3 bug, see PR56019.  */
  26 #include <stddef.h>
  27
  28 #include <isl/constraint.h>
  29 #include <isl/set.h>
  30 #include <isl/map.h>
  31 #include <isl/union_map.h>
  32 #include <isl/constraint.h>
  33 #include <isl/ilp.h>
  34 #include <isl/aff.h>
  35 #include <isl/val.h>
  36
  37 /* Since ISL-0.13, the extern is in val_gmp.h.  */
  38 #if !defined(HAVE_ISL_SCHED_CONSTRAINTS_COMPUTE_SCHEDULE) && defined(__cplusplus)
  39 extern "C" {
  40 #endif
  41 #include <isl/val_gmp.h>
  42 #if !defined(HAVE_ISL_SCHED_CONSTRAINTS_COMPUTE_SCHEDULE) && defined(__cplusplus)
  43 }
  44 #endif
  45
  46 #include "system.h"
  47 #include "coretypes.h"
  48 #include "backend.h"
  49 #include "diagnostic-core.h"
  50 #include "cfghooks.h"
  51 #include "tree.h"
  52 #include "gimple.h"
  53 #include "fold-const.h"
  54 #include "gimple-iterator.h"
  55 #include "tree-ssa-loop.h"
  56 #include "gimple-pretty-print.h"
  57 #include "cfgloop.h"
  58 #include "tree-data-ref.h"
  59 #include "graphite-poly.h"
  60
  61 #define OPENSCOP_MAX_STRING 256
  62
  63
  64 /* Print to STDERR the GMP value VAL.  */
  65
  66 DEBUG_FUNCTION void
  67 debug_gmp_value (mpz_t val)
  68 {
  69   gmp_fprintf (stderr, "%Zd", val);
  70 }
  71
  72 /* Return the maximal loop depth in SCOP.  */
  73
  74 int
  75 scop_max_loop_depth (scop_p scop)
  76 {
  77   int i;
  78   poly_bb_p pbb;
  79   int max_nb_loops = 0;
  80
  81   FOR_EACH_VEC_ELT (SCOP_BBS (scop), i, pbb)
  82     {
  83       int nb_loops = pbb_dim_iter_domain (pbb);
  84       if (max_nb_loops < nb_loops)
  85         max_nb_loops = nb_loops;
  86     }
  87
  88   return max_nb_loops;
  89 }
  90
  91 /* Prints to FILE the scattering function of PBB, at some VERBOSITY
  92    level.  */
  93
  94 static void
  95 print_scattering_function_1 (FILE *file, poly_bb_p pbb, int verbosity)
  96 {
  97   graphite_dim_t i;
  98
  99   if (verbosity > 0)
 100     {
 101       fprintf (file, "# scattering bb_%d (\n", pbb_index (pbb));
 102       fprintf (file, "#eq");
 103
 104       for (i = 0; i < pbb_nb_scattering_transform (pbb); i++)
 105         fprintf (file, "     s%d", (int) i);
 106
 107       for (i = 0; i < pbb_nb_local_vars (pbb); i++)
 108         fprintf (file, "    lv%d", (int) i);
 109
 110       for (i = 0; i < pbb_dim_iter_domain (pbb); i++)
 111         fprintf (file, "     i%d", (int) i);
 112
 113       for (i = 0; i < pbb_nb_params (pbb); i++)
 114         fprintf (file, "     p%d", (int) i);
 115
 116       fprintf (file, "    cst\n");
 117     }
 118
 119   fprintf (file, "isl\n");
 120   print_isl_map (file, pbb->transformed ? pbb->transformed : pbb->schedule);
 121
 122   if (verbosity > 0)
 123     fprintf (file, "#)\n");
 124 }
 125
 126 /* Prints to FILE the scattering function of PBB, at some VERBOSITY
 127    level.  */
 128
 129 void
 130 print_scattering_function (FILE *file, poly_bb_p pbb, int verbosity)
 131 {
 132   if (!PBB_TRANSFORMED (pbb))
 133     return;
 134
 135   if (pbb->schedule || pbb->transformed)
 136     {
 137       if (verbosity > 0)
 138         fprintf (file, "# Scattering function is provided\n");
 139
 140       fprintf (file, "1\n");
 141     }
 142   else
 143     {
 144       if (verbosity > 0)
 145         fprintf (file, "# Scattering function is not provided\n");
 146
 147       fprintf (file, "0\n");
 148       return;
 149     }
 150
 151   print_scattering_function_1 (file, pbb, verbosity);
 152
 153   if (verbosity > 0)
 154     fprintf (file, "# Scattering names are not provided\n");
 155
 156   fprintf (file, "0\n");
 157
 158 }
 159
 160 /* Prints to FILE the iteration domain of PBB, at some VERBOSITY
 161    level.  */
 162
 163 void
 164 print_iteration_domain (FILE *file, poly_bb_p pbb, int verbosity)
 165 {
 166   print_pbb_domain (file, pbb, verbosity);
 167 }
 168
 169 /* Prints to FILE the scattering functions of every PBB of SCOP.  */
 170
 171 void
 172 print_scattering_functions (FILE *file, scop_p scop, int verbosity)
 173 {
 174   int i;
 175   poly_bb_p pbb;
 176
 177   FOR_EACH_VEC_ELT (SCOP_BBS (scop), i, pbb)
 178     print_scattering_function (file, pbb, verbosity);
 179 }
 180
 181 /* Prints to FILE the iteration domains of every PBB of SCOP, at some
 182    VERBOSITY level.  */
 183
 184 void
 185 print_iteration_domains (FILE *file, scop_p scop, int verbosity)
 186 {
 187   int i;
 188   poly_bb_p pbb;
 189
 190   FOR_EACH_VEC_ELT (SCOP_BBS (scop), i, pbb)
 191     print_iteration_domain (file, pbb, verbosity);
 192 }
 193
 194 /* Prints to STDERR the scattering function of PBB, at some VERBOSITY
 195    level.  */
 196
 197 DEBUG_FUNCTION void
 198 debug_scattering_function (poly_bb_p pbb, int verbosity)
 199 {
 200   print_scattering_function (stderr, pbb, verbosity);
 201 }
 202
 203 /* Prints to STDERR the iteration domain of PBB, at some VERBOSITY
 204    level.  */
 205
 206 DEBUG_FUNCTION void
 207 debug_iteration_domain (poly_bb_p pbb, int verbosity)
 208 {
 209   print_iteration_domain (stderr, pbb, verbosity);
 210 }
 211
 212 /* Prints to STDERR the scattering functions of every PBB of SCOP, at
 213    some VERBOSITY level.  */
 214
 215 DEBUG_FUNCTION void
 216 debug_scattering_functions (scop_p scop, int verbosity)
 217 {
 218   print_scattering_functions (stderr, scop, verbosity);
 219 }
 220
 221 /* Prints to STDERR the iteration domains of every PBB of SCOP, at
 222    some VERBOSITY level.  */
 223
 224 DEBUG_FUNCTION void
 225 debug_iteration_domains (scop_p scop, int verbosity)
 226 {
 227   print_iteration_domains (stderr, scop, verbosity);
 228 }
 229
 230 /* Apply graphite transformations to all the basic blocks of SCOP.  */
 231
 232 bool
 233 apply_poly_transforms (scop_p scop)
 234 {
 235   bool transform_done = false;
 236
 237   /* Generate code even if we did not apply any real transformation.
 238      This also allows to check the performance for the identity
 239      transformation: GIMPLE -> GRAPHITE -> GIMPLE
 240      Keep in mind that CLooG optimizes in control, so the loop structure
 241      may change, even if we only use -fgraphite-identity.  */
 242   if (flag_graphite_identity)
 243     transform_done = true;
 244
 245   if (flag_loop_parallelize_all)
 246     transform_done = true;
 247
 248   if (flag_loop_block)
 249     transform_done |= scop_do_block (scop);
 250   else
 251     {
 252       if (flag_loop_strip_mine)
 253         transform_done |= scop_do_strip_mine (scop, 0);
 254
 255       if (flag_loop_interchange)
 256         transform_done |= scop_do_interchange (scop);
 257     }
 258
 259   /* This pass needs to be run at the final stage, as it does not
 260      update the lst.  */
 261   if (flag_loop_optimize_isl || flag_loop_unroll_jam)
 262     transform_done |= optimize_isl (scop);
 263
 264   return transform_done;
 265 }
 266
 267 /* Create a new polyhedral data reference and add it to PBB.  It is
 268    defined by its ACCESSES, its TYPE, and the number of subscripts
 269    NB_SUBSCRIPTS.  */
 270
 271 void
 272 new_poly_dr (poly_bb_p pbb, int dr_base_object_set,
 273              enum poly_dr_type type, void *cdr, graphite_dim_t nb_subscripts,
 274              isl_map *acc, isl_set *subscript_sizes)
 275 {
 276   static int id = 0;
 277   poly_dr_p pdr = XNEW (struct poly_dr);
 278
 279   PDR_ID (pdr) = id++;
 280   PDR_BASE_OBJECT_SET (pdr) = dr_base_object_set;
 281   PDR_NB_REFS (pdr) = 1;
 282   PDR_PBB (pdr) = pbb;
 283   pdr->accesses = acc;
 284   pdr->subscript_sizes = subscript_sizes;
 285   PDR_TYPE (pdr) = type;
 286   PDR_CDR (pdr) = cdr;
 287   PDR_NB_SUBSCRIPTS (pdr) = nb_subscripts;
 288   PBB_DRS (pbb).safe_push (pdr);
 289 }
 290
 291 /* Free polyhedral data reference PDR.  */
 292
 293 void
 294 free_poly_dr (poly_dr_p pdr)
 295 {
 296   isl_map_free (pdr->accesses);
 297   isl_set_free (pdr->subscript_sizes);
 298   XDELETE (pdr);
 299 }
 300
 301 /* Create a new polyhedral black box.  */
 302
 303 poly_bb_p
 304 new_poly_bb (scop_p scop, void *black_box)
 305 {
 306   poly_bb_p pbb = XNEW (struct poly_bb);
 307
 308   pbb->domain = NULL;
 309   pbb->schedule = NULL;
 310   pbb->transformed = NULL;
 311   pbb->saved = NULL;
 312   pbb->map_sepclass = NULL;
 313   PBB_SCOP (pbb) = scop;
 314   pbb_set_black_box (pbb, black_box);
 315   PBB_TRANSFORMED (pbb) = NULL;
 316   PBB_SAVED (pbb) = NULL;
 317   PBB_ORIGINAL (pbb) = NULL;
 318   PBB_DRS (pbb).create (3);
 319   PBB_IS_REDUCTION (pbb) = false;
 320   GBB_PBB ((gimple_bb_p) black_box) = pbb;
 321
 322   return pbb;
 323 }
 324
 325 /* Free polyhedral black box.  */
 326
 327 void
 328 free_poly_bb (poly_bb_p pbb)
 329 {
 330   int i;
 331   poly_dr_p pdr;
 332
 333   isl_set_free (pbb->domain);
 334   isl_map_free (pbb->schedule);
 335   isl_map_free (pbb->transformed);
 336   isl_map_free (pbb->saved);
 337
 338   if (PBB_DRS (pbb).exists ())
 339     FOR_EACH_VEC_ELT (PBB_DRS (pbb), i, pdr)
 340       free_poly_dr (pdr);
 341
 342   PBB_DRS (pbb).release ();
 343   XDELETE (pbb);
 344 }
 345
 346 static void
 347 print_pdr_access_layout (FILE *file, poly_bb_p pbb, poly_dr_p pdr)
 348 {
 349   graphite_dim_t i;
 350
 351   fprintf (file, "#  eq");
 352
 353   fprintf (file, "   alias");
 354
 355   for (i = 0; i < PDR_NB_SUBSCRIPTS (pdr); i++)
 356     fprintf (file, "   sub%d", (int) i);
 357
 358   for (i = 0; i < pbb_dim_iter_domain (pbb); i++)
 359     fprintf (file, "     i%d", (int) i);
 360
 361   for (i = 0; i < pbb_nb_params (pbb); i++)
 362     fprintf (file, "     p%d", (int) i);
 363
 364   fprintf (file, "    cst\n");
 365 }
 366
 367 /* Prints to FILE the polyhedral data reference PDR, at some VERBOSITY
 368    level.  */
 369
 370 void
 371 print_pdr (FILE *file, poly_dr_p pdr, int verbosity)
 372 {
 373   if (verbosity > 1)
 374     {
 375       fprintf (file, "# pdr_%d (", PDR_ID (pdr));
 376
 377       switch (PDR_TYPE (pdr))
 378         {
 379         case PDR_READ:
 380           fprintf (file, "read \n");
 381           break;
 382
 383         case PDR_WRITE:
 384           fprintf (file, "write \n");
 385           break;
 386
 387         case PDR_MAY_WRITE:
 388           fprintf (file, "may_write \n");
 389           break;
 390
 391         default:
 392           gcc_unreachable ();
 393         }
 394
 395       dump_data_reference (file, (data_reference_p) PDR_CDR (pdr));
 396     }
 397
 398   if (verbosity > 0)
 399     {
 400       fprintf (file, "# data accesses (\n");
 401       print_pdr_access_layout (file, PDR_PBB (pdr), pdr);
 402     }
 403
 404   /* XXX isl dump accesses/subscripts */
 405
 406   if (verbosity > 0)
 407     fprintf (file, "#)\n");
 408
 409   if (verbosity > 1)
 410     fprintf (file, "#)\n");
 411 }
 412
 413 /* Prints to STDERR the polyhedral data reference PDR, at some
 414    VERBOSITY level.  */
 415
 416 DEBUG_FUNCTION void
 417 debug_pdr (poly_dr_p pdr, int verbosity)
 418 {
 419   print_pdr (stderr, pdr, verbosity);
 420 }
 421
 422 /* Creates a new SCOP containing REGION.  */
 423
 424 scop_p
 425 new_scop (void *region)
 426 {
 427   scop_p scop = XNEW (struct scop);
 428
 429   scop->context = NULL;
 430   scop->must_raw = NULL;
 431   scop->may_raw = NULL;
 432   scop->must_raw_no_source = NULL;
 433   scop->may_raw_no_source = NULL;
 434   scop->must_war = NULL;
 435   scop->may_war = NULL;
 436   scop->must_war_no_source = NULL;
 437   scop->may_war_no_source = NULL;
 438   scop->must_waw = NULL;
 439   scop->may_waw = NULL;
 440   scop->must_waw_no_source = NULL;
 441   scop->may_waw_no_source = NULL;
 442   scop_set_region (scop, region);
 443   SCOP_BBS (scop).create (3);
 444   SCOP_ORIGINAL_SCHEDULE (scop) = NULL;
 445   SCOP_TRANSFORMED_SCHEDULE (scop) = NULL;
 446   SCOP_SAVED_SCHEDULE (scop) = NULL;
 447   POLY_SCOP_P (scop) = false;
 448
 449   return scop;
 450 }
 451
 452 /* Deletes SCOP.  */
 453
 454 void
 455 free_scop (scop_p scop)
 456 {
 457   int i;
 458   poly_bb_p pbb;
 459
 460   FOR_EACH_VEC_ELT (SCOP_BBS (scop), i, pbb)
 461     free_poly_bb (pbb);
 462
 463   SCOP_BBS (scop).release ();
 464
 465   isl_set_free (scop->context);
 466   isl_union_map_free (scop->must_raw);
 467   isl_union_map_free (scop->may_raw);
 468   isl_union_map_free (scop->must_raw_no_source);
 469   isl_union_map_free (scop->may_raw_no_source);
 470   isl_union_map_free (scop->must_war);
 471   isl_union_map_free (scop->may_war);
 472   isl_union_map_free (scop->must_war_no_source);
 473   isl_union_map_free (scop->may_war_no_source);
 474   isl_union_map_free (scop->must_waw);
 475   isl_union_map_free (scop->may_waw);
 476   isl_union_map_free (scop->must_waw_no_source);
 477   isl_union_map_free (scop->may_waw_no_source);
 478   free_lst (SCOP_ORIGINAL_SCHEDULE (scop));
 479   free_lst (SCOP_TRANSFORMED_SCHEDULE (scop));
 480   free_lst (SCOP_SAVED_SCHEDULE (scop));
 481   XDELETE (scop);
 482 }
 483
 484 /* Print to FILE the domain of PBB in OpenScop format, at some VERBOSITY
 485    level.  */
 486
 487 static void
 488 openscop_print_pbb_domain (FILE *file, poly_bb_p pbb, int verbosity)
 489 {
 490   graphite_dim_t i;
 491   gimple_bb_p gbb = PBB_BLACK_BOX (pbb);
 492
 493   if (!pbb->domain)
 494     return;
 495
 496   if (verbosity > 0)
 497     {
 498       fprintf (file, "\n# Iteration domain of bb_%d (\n", GBB_BB (gbb)->index);
 499       fprintf (file, "#eq");
 500
 501       for (i = 0; i < pbb_dim_iter_domain (pbb); i++)
 502         fprintf (file, "     i%d", (int) i);
 503
 504       for (i = 0; i < pbb_nb_params (pbb); i++)
 505         fprintf (file, "     p%d", (int) i);
 506
 507       fprintf (file, "    cst\n");
 508     }
 509
 510   fprintf (file, "XXX isl\n");
 511
 512   if (verbosity > 0)
 513     fprintf (file, "#)\n");
 514 }
 515
 516 /* Print to FILE the domain of PBB, at some VERBOSITY level.  */
 517
 518 void
 519 print_pbb_domain (FILE *file, poly_bb_p pbb, int verbosity ATTRIBUTE_UNUSED)
 520 {
 521   print_isl_set (file, pbb->domain);
 522 }
 523
 524 /* Dump the cases of a graphite basic block GBB on FILE.  */
 525
 526 static void
 527 dump_gbb_cases (FILE *file, gimple_bb_p gbb)
 528 {
 529   int i;
 530   gimple stmt;
 531   vec<gimple> cases;
 532
 533   if (!gbb)
 534     return;
 535
 536   cases = GBB_CONDITION_CASES (gbb);
 537   if (cases.is_empty ())
 538     return;
 539
 540   fprintf (file, "# cases bb_%d (\n", GBB_BB (gbb)->index);
 541
 542   FOR_EACH_VEC_ELT (cases, i, stmt)
 543     {
 544       fprintf (file, "# ");
 545       print_gimple_stmt (file, stmt, 0, 0);
 546     }
 547
 548   fprintf (file, "#)\n");
 549 }
 550
 551 /* Dump conditions of a graphite basic block GBB on FILE.  */
 552
 553 static void
 554 dump_gbb_conditions (FILE *file, gimple_bb_p gbb)
 555 {
 556   int i;
 557   gimple stmt;
 558   vec<gimple> conditions;
 559
 560   if (!gbb)
 561     return;
 562
 563   conditions = GBB_CONDITIONS (gbb);
 564   if (conditions.is_empty ())
 565     return;
 566
 567   fprintf (file, "# conditions bb_%d (\n", GBB_BB (gbb)->index);
 568
 569   FOR_EACH_VEC_ELT (conditions, i, stmt)
 570     {
 571       fprintf (file, "# ");
 572       print_gimple_stmt (file, stmt, 0, 0);
 573     }
 574
 575   fprintf (file, "#)\n");
 576 }
 577
 578 /* Print to FILE all the data references of PBB, at some VERBOSITY
 579    level.  */
 580
 581 void
 582 print_pdrs (FILE *file, poly_bb_p pbb, int verbosity)
 583 {
 584   int i;
 585   poly_dr_p pdr;
 586   int nb_reads = 0;
 587   int nb_writes = 0;
 588
 589   if (PBB_DRS (pbb).length () == 0)
 590     {
 591       if (verbosity > 0)
 592         fprintf (file, "# Access informations are not provided\n");\
 593       fprintf (file, "0\n");
 594       return;
 595     }
 596
 597   if (verbosity > 1)
 598     fprintf (file, "# Data references (\n");
 599
 600   if (verbosity > 0)
 601     fprintf (file, "# Access informations are provided\n");
 602   fprintf (file, "1\n");
 603
 604   FOR_EACH_VEC_ELT (PBB_DRS (pbb), i, pdr)
 605     if (PDR_TYPE (pdr) == PDR_READ)
 606       nb_reads++;
 607     else
 608       nb_writes++;
 609
 610   if (verbosity > 1)
 611     fprintf (file, "# Read data references (\n");
 612
 613   if (verbosity > 0)
 614     fprintf (file, "# Read access informations\n");
 615   fprintf (file, "%d\n", nb_reads);
 616
 617   FOR_EACH_VEC_ELT (PBB_DRS (pbb), i, pdr)
 618     if (PDR_TYPE (pdr) == PDR_READ)
 619       print_pdr (file, pdr, verbosity);
 620
 621   if (verbosity > 1)
 622     fprintf (file, "#)\n");
 623
 624   if (verbosity > 1)
 625     fprintf (file, "# Write data references (\n");
 626
 627   if (verbosity > 0)
 628     fprintf (file, "# Write access informations\n");
 629   fprintf (file, "%d\n", nb_writes);
 630
 631   FOR_EACH_VEC_ELT (PBB_DRS (pbb), i, pdr)
 632     if (PDR_TYPE (pdr) != PDR_READ)
 633       print_pdr (file, pdr, verbosity);
 634
 635   if (verbosity > 1)
 636     fprintf (file, "#)\n");
 637
 638   if (verbosity > 1)
 639     fprintf (file, "#)\n");
 640 }
 641
 642 /* Print to STDERR all the data references of PBB.  */
 643
 644 DEBUG_FUNCTION void
 645 debug_pdrs (poly_bb_p pbb, int verbosity)
 646 {
 647   print_pdrs (stderr, pbb, verbosity);
 648 }
 649
 650 /* Print to FILE the body of PBB, at some VERBOSITY level.
 651    If statement_body_provided is false statement body is not printed.  */
 652
 653 static void
 654 print_pbb_body (FILE *file, poly_bb_p pbb, int verbosity,
 655                 bool statement_body_provided)
 656 {
 657   if (verbosity > 1)
 658     fprintf (file, "# Body (\n");
 659
 660   if (!statement_body_provided)
 661     {
 662       if (verbosity > 0)
 663         fprintf (file, "# Statement body is not provided\n");
 664
 665       fprintf (file, "0\n");
 666
 667       if (verbosity > 1)
 668         fprintf (file, "#)\n");
 669       return;
 670     }
 671
 672   if (verbosity > 0)
 673     fprintf (file, "# Statement body is provided\n");
 674   fprintf (file, "1\n");
 675
 676   if (verbosity > 0)
 677     fprintf (file, "# Original iterator names\n# Iterator names are not provided yet.\n");
 678
 679   if (verbosity > 0)
 680     fprintf (file, "# Statement body\n");
 681
 682   fprintf (file, "{\n");
 683   dump_bb (file, pbb_bb (pbb), 0, 0);
 684   fprintf (file, "}\n");
 685
 686   if (verbosity > 1)
 687     fprintf (file, "#)\n");
 688 }
 689
 690 /* Print to FILE the domain and scattering function of PBB, at some
 691    VERBOSITY level.  */
 692
 693 void
 694 print_pbb (FILE *file, poly_bb_p pbb, int verbosity)
 695 {
 696   if (verbosity > 1)
 697     {
 698       fprintf (file, "# pbb_%d (\n", pbb_index (pbb));
 699       dump_gbb_conditions (file, PBB_BLACK_BOX (pbb));
 700       dump_gbb_cases (file, PBB_BLACK_BOX (pbb));
 701     }
 702
 703   openscop_print_pbb_domain (file, pbb, verbosity);
 704   print_scattering_function (file, pbb, verbosity);
 705   print_pdrs (file, pbb, verbosity);
 706   print_pbb_body (file, pbb, verbosity, false);
 707
 708   if (verbosity > 1)
 709     fprintf (file, "#)\n");
 710 }
 711
 712 /* Print to FILE the parameters of SCOP, at some VERBOSITY level.  */
 713
 714 void
 715 print_scop_params (FILE *file, scop_p scop, int verbosity)
 716 {
 717   int i;
 718   tree t;
 719
 720   if (verbosity > 1)
 721     fprintf (file, "# parameters (\n");
 722
 723   if (SESE_PARAMS (SCOP_REGION (scop)).length ())
 724     {
 725       if (verbosity > 0)
 726         fprintf (file, "# Parameter names are provided\n");
 727
 728       fprintf (file, "1\n");
 729
 730       if (verbosity > 0)
 731         fprintf (file, "# Parameter names\n");
 732     }
 733   else
 734     {
 735       if (verbosity > 0)
 736         fprintf (file, "# Parameter names are not provided\n");
 737       fprintf (file, "0\n");
 738     }
 739
 740   FOR_EACH_VEC_ELT (SESE_PARAMS (SCOP_REGION (scop)), i, t)
 741     {
 742       print_generic_expr (file, t, 0);
 743       fprintf (file, " ");
 744     }
 745
 746   fprintf (file, "\n");
 747
 748   if (verbosity > 1)
 749     fprintf (file, "#)\n");
 750 }
 751
 752 /* Print to FILE the context of SCoP in OpenScop format, at some VERBOSITY
 753    level.  */
 754
 755 static void
 756 openscop_print_scop_context (FILE *file, scop_p scop, int verbosity)
 757 {
 758   graphite_dim_t i;
 759
 760   if (verbosity > 0)
 761     {
 762       fprintf (file, "# Context (\n");
 763       fprintf (file, "#eq");
 764
 765       for (i = 0; i < scop_nb_params (scop); i++)
 766         fprintf (file, "     p%d", (int) i);
 767
 768       fprintf (file, "    cst\n");
 769     }
 770
 771   if (scop->context)
 772     /* XXX isl print context */
 773     fprintf (file, "XXX isl\n");
 774   else
 775     fprintf (file, "0 %d 0 0 0 %d\n", (int) scop_nb_params (scop) + 2,
 776              (int) scop_nb_params (scop));
 777
 778   if (verbosity > 0)
 779     fprintf (file, "# )\n");
 780 }
 781
 782 /* Print to FILE the context of SCoP, at some VERBOSITY level.  */
 783
 784 void
 785 print_scop_context (FILE *file, scop_p scop, int verbosity)
 786 {
 787   graphite_dim_t i;
 788
 789   if (verbosity > 0)
 790     {
 791       fprintf (file, "# Context (\n");
 792       fprintf (file, "#eq");
 793
 794       for (i = 0; i < scop_nb_params (scop); i++)
 795         fprintf (file, "     p%d", (int) i);
 796
 797       fprintf (file, "    cst\n");
 798     }
 799
 800   if (scop->context)
 801     print_isl_set (file, scop->context);
 802   else
 803     fprintf (file, "no isl context %d\n", (int) scop_nb_params (scop) + 2);
 804
 805   if (verbosity > 0)
 806     fprintf (file, "# )\n");
 807 }
 808
 809 /* Print to FILE the SCOP, at some VERBOSITY level.  */
 810
 811 void
 812 print_scop (FILE *file, scop_p scop, int verbosity)
 813 {
 814   int i;
 815   poly_bb_p pbb;
 816
 817   fprintf (file, "SCoP 1\n#(\n");
 818   fprintf (file, "# Language\nGimple\n");
 819   openscop_print_scop_context (file, scop, verbosity);
 820   print_scop_params (file, scop, verbosity);
 821
 822   if (verbosity > 0)
 823     fprintf (file, "# Number of statements\n");
 824
 825   fprintf (file, "%d\n", SCOP_BBS (scop).length ());
 826
 827   FOR_EACH_VEC_ELT (SCOP_BBS (scop), i, pbb)
 828     print_pbb (file, pbb, verbosity);
 829
 830   if (verbosity > 1)
 831     {
 832       fprintf (file, "# original_lst (\n");
 833       print_lst (file, SCOP_ORIGINAL_SCHEDULE (scop), 0);
 834       fprintf (file, "\n#)\n");
 835
 836       fprintf (file, "# transformed_lst (\n");
 837       print_lst (file, SCOP_TRANSFORMED_SCHEDULE (scop), 0);
 838       fprintf (file, "\n#)\n");
 839     }
 840
 841   fprintf (file, "#)\n");
 842 }
 843
 844 /* Print to STDERR the domain of PBB, at some VERBOSITY level.  */
 845
 846 DEBUG_FUNCTION void
 847 debug_pbb_domain (poly_bb_p pbb, int verbosity)
 848 {
 849   print_pbb_domain (stderr, pbb, verbosity);
 850 }
 851
 852 /* Print to FILE the domain and scattering function of PBB, at some
 853    VERBOSITY level.  */
 854
 855 DEBUG_FUNCTION void
 856 debug_pbb (poly_bb_p pbb, int verbosity)
 857 {
 858   print_pbb (stderr, pbb, verbosity);
 859 }
 860
 861 /* Print to STDERR the context of SCOP, at some VERBOSITY level.  */
 862
 863 DEBUG_FUNCTION void
 864 debug_scop_context (scop_p scop, int verbosity)
 865 {
 866   print_scop_context (stderr, scop, verbosity);
 867 }
 868
 869 /* Print to STDERR the SCOP, at some VERBOSITY level.  */
 870
 871 DEBUG_FUNCTION void
 872 debug_scop (scop_p scop, int verbosity)
 873 {
 874   print_scop (stderr, scop, verbosity);
 875 }
 876
 877 /* Print to STDERR the parameters of SCOP, at some VERBOSITY
 878    level.  */
 879
 880 DEBUG_FUNCTION void
 881 debug_scop_params (scop_p scop, int verbosity)
 882 {
 883   print_scop_params (stderr, scop, verbosity);
 884 }
 885
 886 extern isl_ctx *the_isl_ctx;
 887 void
 888 print_isl_set (FILE *f, isl_set *set)
 889 {
 890   isl_printer *p = isl_printer_to_file (the_isl_ctx, f);
 891   p = isl_printer_print_set (p, set);
 892   isl_printer_free (p);
 893 }
 894
 895 DEBUG_FUNCTION void
 896 debug_isl_set (isl_set *set)
 897 {
 898   print_isl_set (stderr, set);
 899 }
 900
 901 void
 902 print_isl_map (FILE *f, isl_map *map)
 903 {
 904   isl_printer *p = isl_printer_to_file (the_isl_ctx, f);
 905   p = isl_printer_print_map (p, map);
 906   isl_printer_free (p);
 907 }
 908
 909 DEBUG_FUNCTION void
 910 debug_isl_map (isl_map *map)
 911 {
 912   print_isl_map (stderr, map);
 913 }
 914
 915 void
 916 print_isl_aff (FILE *f, isl_aff *aff)
 917 {
 918   isl_printer *p = isl_printer_to_file (the_isl_ctx, f);
 919   p = isl_printer_print_aff (p, aff);
 920   isl_printer_free (p);
 921 }
 922
 923 DEBUG_FUNCTION void
 924 debug_isl_aff (isl_aff *aff)
 925 {
 926   print_isl_aff (stderr, aff);
 927 }
 928
 929 void
 930 print_isl_constraint (FILE *f, isl_constraint *c)
 931 {
 932   isl_printer *p = isl_printer_to_file (the_isl_ctx, f);
 933   p = isl_printer_print_constraint (p, c);
 934   isl_printer_free (p);
 935 }
 936
 937 DEBUG_FUNCTION void
 938 debug_isl_constraint (isl_constraint *c)
 939 {
 940   print_isl_constraint (stderr, c);
 941 }
 942
 943 /* Returns the number of iterations RES of the loop around PBB at
 944    time(scattering) dimension TIME_DEPTH.  */
 945
 946 void
 947 pbb_number_of_iterations_at_time (poly_bb_p pbb,
 948                                   graphite_dim_t time_depth,
 949                                   mpz_t res)
 950 {
 951   isl_set *transdomain;
 952   isl_space *dc;
 953   isl_aff *aff;
 954   isl_val *isllb, *islub;
 955
 956   /* Map the iteration domain through the current scatter, and work
 957      on the resulting set.  */
 958   transdomain = isl_set_apply (isl_set_copy (pbb->domain),
 959                                isl_map_copy (pbb->transformed));
 960
 961   /* Select the time_depth' dimension via an affine expression.  */
 962   dc = isl_set_get_space (transdomain);
 963   aff = isl_aff_zero_on_domain (isl_local_space_from_space (dc));
 964   aff = isl_aff_set_coefficient_si (aff, isl_dim_in, time_depth, 1);
 965
 966   /* And find the min/max for that function.  */
 967   /* XXX isl check results?  */
 968   isllb = isl_set_min_val (transdomain, aff);
 969   islub = isl_set_max_val (transdomain, aff);
 970
 971   islub = isl_val_sub (islub, isllb);
 972   islub = isl_val_add_ui (islub, 1);
 973   isl_val_get_num_gmp (islub, res);
 974
 975   isl_val_free (islub);
 976   isl_aff_free (aff);
 977   isl_set_free (transdomain);
 978 }
 979
 980 /* Translates LOOP to LST.  */
 981
 982 static lst_p
 983 loop_to_lst (loop_p loop, vec<poly_bb_p> bbs, int *i)
 984 {
 985   poly_bb_p pbb;
 986   vec<lst_p> seq;
 987   seq.create (5);
 988
 989   for (; bbs.iterate (*i, &pbb); (*i)++)
 990     {
 991       lst_p stmt;
 992       basic_block bb = GBB_BB (PBB_BLACK_BOX (pbb));
 993
 994       if (bb->loop_father == loop)
 995         stmt = new_lst_stmt (pbb);
 996       else if (flow_bb_inside_loop_p (loop, bb))
 997         {
 998           loop_p next = loop->inner;
 999
1000           while (next && !flow_bb_inside_loop_p (next, bb))
1001             next = next->next;
1002
1003           stmt = loop_to_lst (next, bbs, i);
1004         }
1005       else
1006         {
1007           (*i)--;
1008           return new_lst_loop (seq);
1009         }
1010
1011       seq.safe_push (stmt);
1012     }
1013
1014   return new_lst_loop (seq);
1015 }
1016
1017 /* Reads the original scattering of the SCOP and returns an LST
1018    representing it.  */
1019
1020 void
1021 scop_to_lst (scop_p scop)
1022 {
1023   lst_p res;
1024   int i, n = SCOP_BBS (scop).length ();
1025   vec<lst_p> seq;
1026   seq.create (5);
1027   sese region = SCOP_REGION (scop);
1028
1029   for (i = 0; i < n; i++)
1030     {
1031       poly_bb_p pbb = SCOP_BBS (scop)[i];
1032       loop_p loop = outermost_loop_in_sese (region, GBB_BB (PBB_BLACK_BOX (pbb)));
1033
1034       if (loop_in_sese_p (loop, region))
1035         res = loop_to_lst (loop, SCOP_BBS (scop), &i);
1036       else
1037         res = new_lst_stmt (pbb);
1038
1039       seq.safe_push (res);
1040     }
1041
1042   res = new_lst_loop (seq);
1043   SCOP_ORIGINAL_SCHEDULE (scop) = res;
1044   SCOP_TRANSFORMED_SCHEDULE (scop) = copy_lst (res);
1045 }
1046
1047 /* Print to FILE on a new line COLUMN white spaces.  */
1048
1049 static void
1050 lst_indent_to (FILE *file, int column)
1051 {
1052   int i;
1053
1054   if (column > 0)
1055     fprintf (file, "\n#");
1056
1057   for (i = 0; i < column; i++)
1058     fprintf (file, " ");
1059 }
1060
1061 /* Print LST to FILE with INDENT spaces of indentation.  */
1062
1063 void
1064 print_lst (FILE *file, lst_p lst, int indent)
1065 {
1066   if (!lst)
1067     return;
1068
1069   lst_indent_to (file, indent);
1070
1071   if (LST_LOOP_P (lst))
1072     {
1073       int i;
1074       lst_p l;
1075
1076       if (LST_LOOP_FATHER (lst))
1077         fprintf (file, "%d (loop", lst_dewey_number (lst));
1078       else
1079         fprintf (file, "#(root");
1080
1081       FOR_EACH_VEC_ELT (LST_SEQ (lst), i, l)
1082         print_lst (file, l, indent + 2);
1083
1084       fprintf (file, ")");
1085     }
1086   else
1087     fprintf (file, "%d stmt_%d", lst_dewey_number (lst), pbb_index (LST_PBB (lst)));
1088 }
1089
1090 /* Print LST to STDERR.  */
1091
1092 DEBUG_FUNCTION void
1093 debug_lst (lst_p lst)
1094 {
1095   print_lst (stderr, lst, 0);
1096 }
1097
1098 /* Pretty print to FILE the loop statement tree LST in DOT format.  */
1099
1100 static void
1101 dot_lst_1 (FILE *file, lst_p lst)
1102 {
1103   if (!lst)
1104     return;
1105
1106   if (LST_LOOP_P (lst))
1107     {
1108       int i;
1109       lst_p l;
1110
1111       if (!LST_LOOP_FATHER (lst))
1112         fprintf (file, "L -> L_%d_%d\n",
1113                  lst_depth (lst),
1114                  lst_dewey_number (lst));
1115       else
1116         fprintf (file, "L_%d_%d -> L_%d_%d\n",
1117                  lst_depth (LST_LOOP_FATHER (lst)),
1118                  lst_dewey_number (LST_LOOP_FATHER (lst)),
1119                  lst_depth (lst),
1120                  lst_dewey_number (lst));
1121
1122       FOR_EACH_VEC_ELT (LST_SEQ (lst), i, l)
1123         dot_lst_1 (file, l);
1124     }
1125
1126   else
1127     fprintf (file, "L_%d_%d -> S_%d\n",
1128              lst_depth (LST_LOOP_FATHER (lst)),
1129              lst_dewey_number (LST_LOOP_FATHER (lst)),
1130              pbb_index (LST_PBB (lst)));
1131
1132 }
1133
1134 /* Display the LST using dotty.  */
1135
1136 DEBUG_FUNCTION void
1137 dot_lst (lst_p lst)
1138 {
1139   /* When debugging, enable the following code.  This cannot be used
1140      in production compilers because it calls "system".  */
1141 #if 0
1142   FILE *stream = fopen ("/tmp/lst.dot", "w");
1143   gcc_assert (stream);
1144
1145   fputs ("digraph all {\n", stream);
1146   dot_lst_1 (stream, lst);
1147   fputs ("}\n\n", stream);
1148   fclose (stream);
1149
1150   system ("dotty /tmp/lst.dot &");
1151 #else
1152   fputs ("digraph all {\n", stderr);
1153   dot_lst_1 (stderr, lst);
1154   fputs ("}\n\n", stderr);
1155
1156 #endif
1157 }
1158
1159 /* Reverse the loop around PBB at level DEPTH.  */
1160
1161 isl_map *
1162 reverse_loop_at_level (poly_bb_p pbb, int depth)
1163 {
1164   unsigned i, depth_dim = psct_dynamic_dim (pbb, depth);
1165   isl_space *d = isl_map_get_space (pbb->transformed);
1166   isl_space *d1 = isl_space_range (d);
1167   unsigned n = isl_space_dim (d1, isl_dim_out);
1168   isl_space *d2 = isl_space_add_dims (d1, isl_dim_in, n);
1169   isl_map *x = isl_map_universe (isl_space_copy (d2));
1170   isl_constraint *c = isl_equality_alloc (isl_local_space_from_space (d2));
1171
1172   for (i = 0; i < n; i++)
1173     if (i != depth_dim)
1174       x = isl_map_equate (x, isl_dim_in, i, isl_dim_out, i);
1175
1176   c = isl_constraint_set_coefficient_si (c, isl_dim_in, depth_dim, 1);
1177   c = isl_constraint_set_coefficient_si (c, isl_dim_out, depth_dim, 1);
1178   x = isl_map_add_constraint (x, c);
1179   return x;
1180 }
1181
1182 /* Reverse the loop at level DEPTH for all the PBBS.  */
1183
1184 isl_union_map *
1185 reverse_loop_for_pbbs (scop_p scop, vec<poly_bb_p> pbbs, int depth)
1186 {
1187   poly_bb_p pbb;
1188   int i;
1189   isl_space *space = isl_space_from_domain (isl_set_get_space (scop->context));
1190   isl_union_map *res = isl_union_map_empty (space);
1191
1192   for (i = 0; pbbs.iterate (i, &pbb); i++)
1193     res = isl_union_map_add_map (res, reverse_loop_at_level (pbb, depth));
1194
1195   return res;
1196 }
1197
1198
1199 #endif  /* HAVE_isl */
1200