nsz Git - libfirm/blob - ir/be/beifg.c

   1 /**
   2  * @file   beifg.c
   3  * @date   18.11.2005
   4  * @author Sebastian Hack
   5  *
   6  * Copyright (C) 2005 Universitaet Karlsruhe
   7  * Released under the GPL
   8  */
   9
  10 #include <stdlib.h>
  11
  12 #ifdef HAVE_CONFIG_H
  13 #include "config.h"
  14 #endif
  15
  16 #ifdef HAVE_MALLOC_H
  17 #include <malloc.h>
  18 #endif
  19
  20 #ifdef __linux__
  21 #include <malloc.h>
  22 #endif /* __linux__ */
  23
  24 #ifdef HAVE_ALLOCA_H
  25 #include <alloca.h>
  26 #endif
  27
  28 #ifdef WITH_LIBCORE
  29 #include <libcore/lc_opts.h>
  30 #include <libcore/lc_opts_enum.h>
  31 #include <libcore/lc_timing.h>
  32 #endif /* WITH_LIBCORE */
  33
  34 #include "bitset.h"
  35
  36 #include "irgwalk.h"
  37 #include "irnode_t.h"
  38 #include "irprintf.h"
  39 #include "irtools.h"
  40 #include "beifg_t.h"
  41 #include "beifg_impl.h"
  42 #include "irphase.h"
  43 #include "irphase_t.h"
  44 #include "bechordal.h"
  45
  46 #include "becopystat.h"
  47 #include "becopyopt.h"
  48
  49 /** Defines values for the ifg performance test */
  50 #define BE_CH_PERFORMANCETEST_MIN_NODES (50)
  51 #define BE_CH_PERFORMANCETEST_COUNT (500)
  52
  53 typedef struct _coloring_t coloring_t;
  54
  55 struct _coloring_t {
  56         phase_t ph;
  57         const arch_env_t *arch_env;
  58         ir_graph *irg;
  59 };
  60
  61 size_t (be_ifg_nodes_iter_size)(const void *self)
  62 {
  63         const be_ifg_t *ifg = self;
  64         return ifg->impl->nodes_iter_size;
  65 }
  66
  67 size_t (be_ifg_neighbours_iter_size)(const void *self)
  68 {
  69         const be_ifg_t *ifg = self;
  70         return ifg->impl->neighbours_iter_size;
  71 }
  72
  73 size_t (be_ifg_cliques_iter_size)(const void *self)
  74 {
  75         const be_ifg_t *ifg = self;
  76         return ifg->impl->cliques_iter_size;
  77 }
  78
  79 static void *regs_irn_data_init(phase_t *ph, ir_node *irn, void *data)
  80 {
  81         coloring_t *coloring = (coloring_t *) ph;
  82         return (void *) arch_get_irn_register(coloring->arch_env, irn);
  83 }
  84
  85 coloring_t *coloring_init(coloring_t *c, ir_graph *irg, const arch_env_t *aenv)
  86 {
  87         phase_init(&c->ph, "regs_map", irg, PHASE_DEFAULT_GROWTH, regs_irn_data_init);
  88         c->arch_env = aenv;
  89         c->irg = irg;
  90         return c;
  91 }
  92
  93 static void get_irn_color(ir_node *irn, void *c)
  94 {
  95         coloring_t *coloring = c;
  96         phase_get_or_set_irn_data(&coloring->ph, irn);
  97 }
  98
  99 static void restore_irn_color(ir_node *irn, void *c)
 100 {
 101         coloring_t *coloring = c;
 102         const arch_register_t *reg = phase_get_irn_data(&coloring->ph, irn);
 103         if(reg)
 104                 arch_set_irn_register(coloring->arch_env, irn, reg);
 105 }
 106
 107 void coloring_save(coloring_t *c)
 108 {
 109         irg_walk_graph(c->irg, NULL, get_irn_color, c);
 110 }
 111
 112 void coloring_restore(coloring_t *c)
 113 {
 114         irg_walk_graph(c->irg, NULL, restore_irn_color, c);
 115 }
 116
 117 void (be_ifg_free)(void *self)
 118 {
 119         be_ifg_t *ifg = self;
 120         ifg->impl->free(self);
 121 }
 122
 123 int (be_ifg_connected)(const void *self, const ir_node *a, const ir_node *b)
 124 {
 125         const be_ifg_t *ifg = self;
 126         return ifg->impl->connected(self, a, b);
 127 }
 128
 129 ir_node *(be_ifg_neighbours_begin)(const void *self, void *iter, const ir_node *irn)
 130 {
 131         const be_ifg_t *ifg = self;
 132         return ifg->impl->neighbours_begin(self, iter, irn);
 133 }
 134
 135 ir_node *(be_ifg_neighbours_next)(const void *self, void *iter)
 136 {
 137         const be_ifg_t *ifg = self;
 138         return ifg->impl->neighbours_next(self, iter);
 139 }
 140
 141 void (be_ifg_neighbours_break)(const void *self, void *iter)
 142 {
 143         const be_ifg_t *ifg = self;
 144         ifg->impl->neighbours_break(self, iter);
 145 }
 146
 147 ir_node *(be_ifg_nodes_begin)(const void *self, void *iter)
 148 {
 149         const be_ifg_t *ifg = self;
 150         return ifg->impl->nodes_begin(self, iter);
 151 }
 152
 153 ir_node *(be_ifg_nodes_next)(const void *self, void *iter)
 154 {
 155         const be_ifg_t *ifg = self;
 156         return ifg->impl->nodes_next(self, iter);
 157 }
 158
 159 void (be_ifg_nodes_break)(const void *self, void *iter)
 160 {
 161         const be_ifg_t *ifg = self;
 162         ifg->impl->nodes_break(self, iter);
 163 }
 164
 165 int (be_ifg_cliques_begin)(const void *self, void *iter, ir_node **buf)
 166 {
 167         const be_ifg_t *ifg = self;
 168         return ifg->impl->cliques_begin(self, iter, buf);
 169 }
 170
 171 int (be_ifg_cliques_next)(const void *self, void *iter)
 172 {
 173         const be_ifg_t *ifg = self;
 174         return ifg->impl->cliques_next(self, iter);
 175 }
 176
 177 void (be_ifg_cliques_break)(const void *self, void *iter)
 178 {
 179         const be_ifg_t *ifg = self;
 180         ifg->impl->cliques_break(self, iter);
 181 }
 182
 183 int (be_ifg_degree)(const void *self, const ir_node *irn)
 184 {
 185         const be_ifg_t *ifg = self;
 186         return ifg->impl->degree(self, irn);
 187 }
 188
 189
 190 int be_ifg_is_simplicial(const be_ifg_t *ifg, const ir_node *irn)
 191 {
 192         int degree = be_ifg_degree(ifg, irn);
 193         void *iter = be_ifg_neighbours_iter_alloca(ifg);
 194
 195         ir_node **neighbours = xmalloc(degree * sizeof(neighbours[0]));
 196
 197         ir_node *curr;
 198         int i, j;
 199
 200         i = 0;
 201         be_ifg_foreach_neighbour(ifg, iter, irn, curr)
 202                 neighbours[i++] = curr;
 203
 204         for(i = 0; i < degree; ++i) {
 205                 for(j = 0; j < i; ++j)
 206                         if(!be_ifg_connected(ifg, neighbours[i], neighbours[j])) {
 207                                 free(neighbours);
 208                                 return 0;
 209                         }
 210         }
 211
 212
 213         free(neighbours);
 214         return 1;
 215 }
 216
 217 void be_ifg_check(const be_ifg_t *ifg)
 218 {
 219         void *iter1 = be_ifg_nodes_iter_alloca(ifg);
 220         void *iter2 = be_ifg_neighbours_iter_alloca(ifg);
 221
 222         ir_node *n, *m;
 223         int node_count = 0;
 224         int neighbours_count = 0;
 225         int degree = 0;
 226
 227         /* count all nodes */
 228         ir_printf("\n\nFound the following nodes in the graph %+F:\n\n", current_ir_graph);
 229         be_ifg_foreach_node(ifg,iter1,n)
 230         {
 231                 node_count++;
 232                 degree = be_ifg_degree(ifg, n);
 233                 ir_printf("%d. %+F with degree: %d\n", node_count, n, degree);
 234         }
 235
 236         ir_printf("\n\nNumber of nodes: %d\n\n", node_count);
 237
 238         /* Check, if all neighbours are indeed connected to the node. */
 239         be_ifg_foreach_node(ifg, iter1, n)
 240         {
 241                 ir_printf("\n%+F; ", n);
 242                 be_ifg_foreach_neighbour(ifg, iter2, n, m)
 243                 {
 244                         ir_printf("%+F; ", m);
 245                         neighbours_count++;
 246                         if(!be_ifg_connected(ifg, n, m))
 247                                 ir_fprintf(stderr, "%+F is a neighbour of %+F but they are not connected!\n", n, m);
 248                 }
 249         }
 250         ir_printf("\n\nFound %d nodes in the 'check neighbour section'\n", neighbours_count);
 251 }
 252
 253 int be_ifg_check_get_node_count(const be_ifg_t *ifg)
 254 {
 255         void *iter = be_ifg_nodes_iter_alloca(ifg);
 256         int node_count = 0;
 257         ir_node *n;
 258
 259         be_ifg_foreach_node(ifg, iter, n)
 260         {
 261                 node_count++;
 262         }
 263
 264         return node_count;
 265 }
 266
 267 static int be_ifg_check_cmp_nodes(const void *a, const void *b)
 268 {
 269         const ir_node *node_a = *(ir_node **)a;
 270         const ir_node *node_b = *(ir_node **)b;
 271
 272         int nr_a = node_a->node_nr;
 273         int nr_b = node_b->node_nr;
 274
 275         return QSORT_CMP(nr_a, nr_b);
 276 }
 277
 278 void be_ifg_check_sorted(const be_ifg_t *ifg)
 279 {
 280         void *iter1 = be_ifg_nodes_iter_alloca(ifg);
 281         void *iter2 = be_ifg_neighbours_iter_alloca(ifg);
 282
 283         ir_node *n, *m;
 284         const int node_count = be_ifg_check_get_node_count(ifg);
 285         int i = 0;
 286
 287         ir_node **all_nodes = xmalloc(node_count * sizeof(all_nodes[0]));
 288
 289         be_ifg_foreach_node(ifg, iter1, n)
 290         {
 291                 if(!node_is_in_irgs_storage(ifg->env->irg, n))
 292                 {
 293                         ir_printf("+%F is in ifg but not in the current irg!", n);
 294                         assert (node_is_in_irgs_storage(ifg->env->irg, n));
 295                 }
 296
 297                 all_nodes[i] = n;
 298                 i++;
 299         }
 300
 301         qsort(all_nodes, node_count, sizeof(all_nodes[0]), be_ifg_check_cmp_nodes);
 302
 303         for (i = 0; i < node_count; i++)
 304         {
 305                 ir_node **neighbours = xmalloc(node_count * sizeof(neighbours[0]));
 306                 int j = 0;
 307                 int k = 0;
 308                 int degree = 0;
 309
 310                 degree = be_ifg_degree(ifg, all_nodes[i]);
 311
 312                 be_ifg_foreach_neighbour(ifg, iter2, all_nodes[i], m)
 313                 {
 314                         neighbours[j] = m;
 315                         j++;
 316                 }
 317
 318                 qsort(neighbours, j, sizeof(neighbours[0]), be_ifg_check_cmp_nodes);
 319
 320                 ir_printf("%d. %+F's neighbours(%d): ", i+1, all_nodes[i], degree);
 321
 322                 for(k = 0; k < j; k++)
 323                 {
 324                         ir_printf("%+F, ", neighbours[k]);
 325                 }
 326
 327                 ir_printf("\n");
 328
 329                 free(neighbours);
 330         }
 331
 332         free(all_nodes);
 333
 334 }
 335
 336 void be_ifg_check_sorted_to_file(const be_ifg_t *ifg, FILE *f)
 337 {
 338         void *iter1 = be_ifg_nodes_iter_alloca(ifg);
 339         void *iter2 = be_ifg_neighbours_iter_alloca(ifg);
 340
 341         ir_node *n, *m;
 342         const int node_count = be_ifg_check_get_node_count(ifg);
 343         int i = 0;
 344
 345         ir_node **all_nodes = xmalloc(node_count * sizeof(all_nodes[0]));
 346
 347         be_ifg_foreach_node(ifg, iter1, n)
 348         {
 349                 if(!node_is_in_irgs_storage(ifg->env->irg, n))
 350                 {
 351                         ir_fprintf (f,"+%F is in ifg but not in the current irg!",n);
 352                         assert (node_is_in_irgs_storage(ifg->env->irg, n));
 353                 }
 354
 355                 all_nodes[i] = n;
 356                 i++;
 357         }
 358
 359         qsort(all_nodes, node_count, sizeof(all_nodes[0]), be_ifg_check_cmp_nodes);
 360
 361         for (i = 0; i < node_count; i++)
 362         {
 363                 ir_node **neighbours = xmalloc(node_count * sizeof(neighbours[0]));
 364                 int j = 0;
 365                 int k = 0;
 366                 int degree = 0;
 367
 368                 degree = be_ifg_degree(ifg, all_nodes[i]);
 369
 370                 be_ifg_foreach_neighbour(ifg, iter2, all_nodes[i], m)
 371                 {
 372                         neighbours[j] = m;
 373                         j++;
 374                 }
 375
 376                 qsort(neighbours, j, sizeof(neighbours[0]), be_ifg_check_cmp_nodes);
 377
 378                 ir_fprintf (f,"%d. %+F's neighbours(%d): ", i+1, all_nodes[i], degree);
 379
 380                 for(k = 0; k < j; k++)
 381                 {
 382                         ir_fprintf (f,"%+F, ", neighbours[k]);
 383                 }
 384
 385                 ir_fprintf (f,"\n");
 386
 387                 free(neighbours);
 388         }
 389
 390         free(all_nodes);
 391
 392 }
 393
 394 void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 395 {
 396         int tests = BE_CH_PERFORMANCETEST_COUNT;
 397         coloring_t coloring;
 398
 399         int used_memory;
 400
 401         int i = 0;
 402         int rt;
 403         copy_opt_t *co;
 404         be_ifg_t *old_if = chordal_env->ifg;
 405
 406         lc_timer_t *timer = lc_timer_register("getTime","get Time of copy minimization using the ifg");
 407         unsigned long elapsed_usec = 0;
 408
 409         if ((int) get_irg_estimated_node_cnt >= BE_CH_PERFORMANCETEST_MIN_NODES)
 410         {
 411                 coloring_init(&coloring, chordal_env->irg, chordal_env->birg->main_env->arch_env);
 412                 coloring_save(&coloring);
 413
 414                 lc_timer_reset(timer);
 415
 416                 for (i = 0; i<tests; i++) /* performance test with std */
 417                 {
 418
 419                         used_memory = lc_get_heap_used_bytes();
 420
 421                         rt = lc_timer_enter_high_priority();
 422                         lc_timer_start(timer);
 423
 424                         chordal_env->ifg = be_ifg_std_new(chordal_env);
 425
 426                         lc_timer_stop(timer);
 427                         rt = lc_timer_leave_high_priority();
 428
 429                         used_memory = lc_get_heap_used_bytes() - used_memory;
 430
 431                         coloring_restore(&coloring);
 432
 433                         co = NULL;
 434                         co = new_copy_opt(chordal_env, co_get_costs_loop_depth);
 435                         co_build_ou_structure(co);
 436                         co_build_graph_structure(co);
 437
 438                         rt = lc_timer_enter_high_priority();
 439                         lc_timer_start(timer);
 440
 441                         co_solve_heuristic_new(co);
 442
 443                         lc_timer_stop(timer);
 444                         rt = lc_timer_leave_high_priority();
 445
 446                         co_free_graph_structure(co);
 447                         co_free_ou_structure(co);
 448                         free_copy_opt(co);
 449                         be_ifg_free(chordal_env->ifg);
 450
 451                 }
 452
 453                 elapsed_usec = lc_timer_elapsed_usec(timer);
 454                 /* calculating average */
 455                 elapsed_usec = elapsed_usec / tests;
 456
 457                 ir_printf("\nstd:; %+F; %u; %u ",current_ir_graph, used_memory, elapsed_usec);
 458
 459                 i=0;
 460                 used_memory=0;
 461                 elapsed_usec=0;
 462
 463                 for (i = 0; i<tests; i++)  /* performance test with clique */
 464                 {
 465                         used_memory = lc_get_heap_used_bytes();
 466
 467                         rt = lc_timer_enter_high_priority();
 468                         lc_timer_start(timer);
 469
 470                         chordal_env->ifg = be_ifg_clique_new(chordal_env);
 471
 472                         lc_timer_stop(timer);
 473                         rt = lc_timer_leave_high_priority();
 474
 475                         used_memory = lc_get_heap_used_bytes() - used_memory;
 476
 477                         coloring_restore(&coloring);
 478
 479                         co = NULL;
 480                         co = new_copy_opt(chordal_env, co_get_costs_loop_depth);
 481                         co_build_ou_structure(co);
 482                         co_build_graph_structure(co);
 483
 484                         rt = lc_timer_enter_high_priority();
 485                         lc_timer_start(timer);
 486
 487                         co_solve_heuristic_new(co);
 488
 489                         lc_timer_stop(timer);
 490                         rt = lc_timer_leave_high_priority();
 491
 492                         co_free_graph_structure(co);
 493                         co_free_ou_structure(co);
 494                         free_copy_opt(co);
 495                         be_ifg_free(chordal_env->ifg);
 496
 497                 }
 498
 499                 elapsed_usec = lc_timer_elapsed_usec(timer);
 500                 /* calculating average */
 501                 elapsed_usec = elapsed_usec / tests;
 502
 503                 ir_printf("\nclique:; %+F; %u; %u ",current_ir_graph, used_memory, elapsed_usec);
 504
 505                 i=0;
 506                 used_memory=0;
 507                 elapsed_usec=0;
 508
 509                 for (i = 0; i<tests; i++)  /* performance test with list */
 510                 {
 511                         used_memory = lc_get_heap_used_bytes();
 512
 513                         rt = lc_timer_enter_high_priority();
 514                         lc_timer_start(timer);
 515
 516                         chordal_env->ifg = be_ifg_list_new(chordal_env);
 517
 518                         lc_timer_stop(timer);
 519                         rt = lc_timer_leave_high_priority();
 520
 521                         used_memory = lc_get_heap_used_bytes() - used_memory;
 522
 523                         coloring_restore(&coloring);
 524
 525                         co = NULL;
 526                         co = new_copy_opt(chordal_env, co_get_costs_loop_depth);
 527                         co_build_ou_structure(co);
 528                         co_build_graph_structure(co);
 529
 530                         rt = lc_timer_enter_high_priority();
 531                         lc_timer_start(timer);
 532
 533                         co_solve_heuristic_new(co);
 534
 535                         lc_timer_stop(timer);
 536                         rt = lc_timer_leave_high_priority();
 537
 538                         co_free_graph_structure(co);
 539                         co_free_ou_structure(co);
 540                         free_copy_opt(co);
 541                         be_ifg_free(chordal_env->ifg);
 542
 543                 }
 544
 545                 elapsed_usec = lc_timer_elapsed_usec(timer);
 546                 /* calculating average */
 547                 elapsed_usec = elapsed_usec / tests;
 548
 549                 ir_printf("\nlist:; %+F; %u; %u ",current_ir_graph, used_memory, elapsed_usec);
 550
 551                 i=0;
 552                 used_memory=0;
 553                 elapsed_usec=0;
 554
 555                 for (i = 0; i<tests; i++)  /* performance test with pointer */
 556                 {
 557                         used_memory = lc_get_heap_used_bytes();
 558
 559                         rt = lc_timer_enter_high_priority();
 560                         lc_timer_start(timer);
 561
 562                         chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 563
 564                         lc_timer_stop(timer);
 565                         rt = lc_timer_leave_high_priority();
 566
 567                         used_memory = lc_get_heap_used_bytes() - used_memory;
 568
 569                         coloring_restore(&coloring);
 570
 571                         co = NULL;
 572                         co = new_copy_opt(chordal_env, co_get_costs_loop_depth);
 573                         co_build_ou_structure(co);
 574                         co_build_graph_structure(co);
 575
 576                         rt = lc_timer_enter_high_priority();
 577                         lc_timer_start(timer);
 578
 579                         co_solve_heuristic_new(co);
 580
 581                         lc_timer_stop(timer);
 582                         rt = lc_timer_leave_high_priority();
 583
 584                         co_free_graph_structure(co);
 585                         co_free_ou_structure(co);
 586                         free_copy_opt(co);
 587                         be_ifg_free(chordal_env->ifg);
 588
 589                 }
 590
 591                 elapsed_usec = lc_timer_elapsed_usec(timer);
 592                 /* calculating average */
 593                 elapsed_usec = elapsed_usec / tests;
 594
 595                 ir_printf("\npointer:; %+F; %u; %u ",current_ir_graph, used_memory, elapsed_usec);
 596
 597                 i=0;
 598                 used_memory=0;
 599                 elapsed_usec=0;
 600         }
 601
 602         chordal_env->ifg = old_if;
 603 }
 604
 605 void be_ifg_dump_dot(be_ifg_t *ifg, ir_graph *irg, FILE *file, const be_ifg_dump_dot_cb_t *cb, void *self)
 606 {
 607         void *nodes_it  = be_ifg_nodes_iter_alloca(ifg);
 608         void *neigh_it  = be_ifg_neighbours_iter_alloca(ifg);
 609         bitset_t *nodes = bitset_malloc(get_irg_last_idx(irg));
 610
 611         ir_node *n, *m;
 612
 613         fprintf(file, "graph G {\n\tgraph [");
 614         if(cb->graph_attr)
 615                 cb->graph_attr(file, self);
 616         fprintf(file, "];\n");
 617
 618         if(cb->at_begin)
 619                 cb->at_begin(file, self);
 620
 621         be_ifg_foreach_node(ifg, nodes_it, n) {
 622                 if(cb->is_dump_node && cb->is_dump_node(self, n)) {
 623                         int idx = get_irn_idx(n);
 624                         bitset_set(nodes, idx);
 625                         fprintf(file, "\tnode [");
 626                         if(cb->node_attr)
 627                                 cb->node_attr(file, self, n);
 628                         fprintf(file, "]; n%d;\n", idx);
 629                 }
 630         }
 631
 632         /* Check, if all neighbours are indeed connected to the node. */
 633         be_ifg_foreach_node(ifg, nodes_it, n) {
 634                 be_ifg_foreach_neighbour(ifg, neigh_it, n, m) {
 635                         int n_idx = get_irn_idx(n);
 636                         int m_idx = get_irn_idx(m);
 637
 638                         if(n_idx < m_idx && bitset_is_set(nodes, n_idx) && bitset_is_set(nodes, m_idx)) {
 639                                 fprintf(file, "\tn%d -- n%d [", n_idx, m_idx);
 640                                 if(cb->edge_attr)
 641                                         cb->edge_attr(file, self, n, m);
 642                                 fprintf(file, "];\n");
 643                         }
 644                 }
 645         }
 646
 647         if(cb->at_end)
 648                 cb->at_end(file, self);
 649
 650         fprintf(file, "}\n");
 651         bitset_free(nodes);
 652 }