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

   1 /**
   2  * @file   bechordal_main.c
   3  * @date   29.11.2005
   4  * @author Sebastian Hack
   5  *
   6  * Copyright (C) 2005 Universitaet Karlsruhe
   7  * Released under the GPL
   8  *
   9  * Driver for the chordal register allocator.
  10  */
  11 #ifdef HAVE_CONFIG_H
  12 #include "config.h"
  13 #endif
  14
  15 #include "obst.h"
  16 #include "pset.h"
  17 #include "list.h"
  18 #include "bitset.h"
  19 #include "iterator.h"
  20 #include "firm_config.h"
  21
  22 #ifdef WITH_LIBCORE
  23 #include <libcore/lc_opts.h>
  24 #include <libcore/lc_opts_enum.h>
  25 #include <libcore/lc_timing.h>
  26 #endif /* WITH_LIBCORE */
  27
  28 #include "irmode_t.h"
  29 #include "irgraph_t.h"
  30 #include "irprintf_t.h"
  31 #include "irgwalk.h"
  32 #include "irdump.h"
  33 #include "irdom.h"
  34 #include "irbitset.h"
  35 #include "debug.h"
  36 #include "xmalloc.h"
  37
  38 #include "bechordal_t.h"
  39 #include "beabi.h"
  40 #include "beutil.h"
  41 #include "besched.h"
  42 #include "benumb_t.h"
  43 #include "besched_t.h"
  44 #include "belive_t.h"
  45 #include "bearch.h"
  46 #include "beifg_t.h"
  47 #include "beifg_impl.h"
  48
  49 #include "bespillbelady.h"
  50 #include "bespillmorgan.h"
  51 #include "belower.h"
  52
  53 #ifdef WITH_ILP
  54 #include "bespillilp.h"
  55 #include "bespillremat.h"
  56 #include "bespillappel.h"
  57 #endif /* WITH_ILP */
  58
  59 #include "becopystat.h"
  60 #include "becopyopt.h"
  61 #include "bessadestr.h"
  62 #include "beverify.h"
  63
  64
  65 void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
  66         const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
  67         struct obstack ob;
  68         pmap_entry *pme;
  69         ir_node **nodes, *n1, *n2;
  70         int i, o;
  71         DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
  72
  73         /* Collect all irns */
  74         obstack_init(&ob);
  75         pmap_foreach(chordal_env->border_heads, pme) {
  76                 border_t *curr;
  77                 struct list_head *head = pme->value;
  78                 list_for_each_entry(border_t, curr, head, list)
  79                         if (curr->is_def && curr->is_real)
  80                                 if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
  81                                         obstack_ptr_grow(&ob, curr->irn);
  82         }
  83         obstack_ptr_grow(&ob, NULL);
  84         nodes = (ir_node **) obstack_finish(&ob);
  85
  86         /* Check them */
  87         for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
  88                 const arch_register_t *n1_reg, *n2_reg;
  89
  90                 n1_reg = arch_get_irn_register(arch_env, n1);
  91                 if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
  92                         DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
  93                         assert(0 && "Register constraint does not hold");
  94                 }
  95                 for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
  96                         n2_reg = arch_get_irn_register(arch_env, n2);
  97                         if (values_interfere(n1, n2) && n1_reg == n2_reg) {
  98                                 DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned: %s\n", n1, n2, n1_reg->name));
  99                                 assert(0 && "Interfering values have the same color!");
 100                         }
 101                 }
 102         }
 103         obstack_free(&ob, NULL);
 104 }
 105
 106 int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
 107 {
 108         if(env->ifg)
 109                 return be_ifg_connected(env->ifg, a, b);
 110         else
 111                 return values_interfere(a, b);
 112 }
 113
 114
 115 static be_ra_chordal_opts_t options = {
 116         BE_CH_DUMP_NONE,
 117         BE_CH_SPILL_BELADY,
 118         BE_CH_COPYMIN_HEUR2,
 119         BE_CH_IFG_STD,
 120         BE_CH_LOWER_PERM_SWAP,
 121         BE_CH_VRFY_WARN,
 122 };
 123
 124 static be_ra_timer_t ra_timer = {
 125
 126         NULL,
 127
 128         NULL,
 129
 130         NULL,
 131
 132         NULL,
 133
 134         NULL,
 135
 136         NULL,
 137
 138         NULL,
 139
 140         NULL,
 141
 142 };
 143
 144 #ifdef WITH_LIBCORE
 145 static const lc_opt_enum_int_items_t spill_items[] = {
 146         { "morgan", BE_CH_SPILL_MORGAN },
 147         { "belady", BE_CH_SPILL_BELADY },
 148 #ifdef WITH_ILP
 149         { "ilp",    BE_CH_SPILL_ILP    },
 150         { "remat",  BE_CH_SPILL_REMAT  },
 151         { "appel",  BE_CH_SPILL_APPEL  },
 152 #endif /* WITH_ILP */
 153         { NULL, 0 }
 154 };
 155
 156 static const lc_opt_enum_int_items_t copymin_items[] = {
 157         { "none",  BE_CH_COPYMIN_NONE      },
 158         { "heur1", BE_CH_COPYMIN_HEUR1     },
 159         { "heur2", BE_CH_COPYMIN_HEUR2     },
 160         { "stat",  BE_CH_COPYMIN_STAT      },
 161         { "park",  BE_CH_COPYMIN_PARK_MOON },
 162 #ifdef WITH_ILP
 163         { "ilp1",  BE_CH_COPYMIN_ILP1 },
 164         { "ilp2",  BE_CH_COPYMIN_ILP2 },
 165 #endif /* WITH_ILP */
 166         { NULL, 0 }
 167 };
 168
 169 static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
 170         { "std",     BE_CH_IFG_STD     },
 171         { "fast",    BE_CH_IFG_FAST    },
 172         { "clique",  BE_CH_IFG_CLIQUE  },
 173         { "pointer", BE_CH_IFG_POINTER },
 174         { "list",    BE_CH_IFG_LIST    },
 175         { "check",   BE_CH_IFG_CHECK   },
 176         { NULL,      0                 }
 177 };
 178
 179 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 180         { "copy", BE_CH_LOWER_PERM_COPY },
 181         { "swap", BE_CH_LOWER_PERM_SWAP },
 182         { NULL, 0 }
 183 };
 184
 185 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 186         { NULL, 0 }
 187 };
 188
 189 static const lc_opt_enum_int_items_t dump_items[] = {
 190         { "spill",    BE_CH_DUMP_SPILL     },
 191         { "live",     BE_CH_DUMP_LIVE      },
 192         { "color",    BE_CH_DUMP_COLOR     },
 193         { "copymin",  BE_CH_DUMP_COPYMIN   },
 194         { "ssadestr", BE_CH_DUMP_SSADESTR  },
 195         { "tree",     BE_CH_DUMP_TREE_INTV },
 196         { "constr",   BE_CH_DUMP_CONSTR    },
 197         { "lower",    BE_CH_DUMP_LOWER     },
 198         { "all",      BE_CH_DUMP_ALL       },
 199         { NULL, 0 }
 200 };
 201
 202 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 203         { "off",    BE_CH_VRFY_OFF    },
 204         { "warn",   BE_CH_VRFY_WARN   },
 205         { "assert", BE_CH_VRFY_ASSERT },
 206         { NULL, 0 }
 207 };
 208
 209 static lc_opt_enum_int_var_t spill_var = {
 210         &options.spill_method, spill_items
 211 };
 212
 213 static lc_opt_enum_int_var_t copymin_var = {
 214         &options.copymin_method, copymin_items
 215 };
 216
 217 static lc_opt_enum_int_var_t ifg_flavor_var = {
 218         &options.ifg_flavor, ifg_flavor_items
 219 };
 220
 221 static lc_opt_enum_int_var_t lower_perm_var = {
 222         &options.lower_perm_opt, lower_perm_items
 223 };
 224
 225 static lc_opt_enum_int_var_t dump_var = {
 226         &options.dump_flags, dump_items
 227 };
 228
 229 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 230         &options.vrfy_option, be_ch_vrfy_items
 231 };
 232
 233 static const lc_opt_table_entry_t be_chordal_options[] = {
 234         LC_OPT_ENT_ENUM_MASK("spill",   "spill method (belady, ilp, remat or appel)", &spill_var),
 235         LC_OPT_ENT_ENUM_PTR ("copymin", "copymin method (none, heur1, heur2, ilp1, ilp2 or stat)", &copymin_var),
 236         LC_OPT_ENT_ENUM_PTR ("ifg",     "interference graph flavour (std, fast, clique, pointer, list, check)", &ifg_flavor_var),
 237         LC_OPT_ENT_ENUM_PTR ("perm",    "perm lowering options (copy or swap)", &lower_perm_var),
 238         LC_OPT_ENT_ENUM_MASK("dump",    "select dump phases", &dump_var),
 239         LC_OPT_ENT_ENUM_PTR ("vrfy",    "verify options (off, warn, assert)", &be_ch_vrfy_var),
 240         { NULL }
 241 };
 242
 243 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 244 {
 245         static int run_once = 0;
 246         lc_opt_entry_t *chordal_grp;
 247
 248         if (! run_once) {
 249                 run_once    = 1;
 250                 chordal_grp = lc_opt_get_grp(grp, "chordal");
 251
 252                 lc_opt_add_table(chordal_grp, be_chordal_options);
 253         }
 254
 255         co_register_options(chordal_grp);
 256 }
 257 #endif /* WITH_LIBCORE */
 258
 259 static void dump(unsigned mask, ir_graph *irg,
 260                                  const arch_register_class_t *cls,
 261                                  const char *suffix,
 262                                  void (*dump_func)(ir_graph *, const char *))
 263 {
 264         if((options.dump_flags & mask) == mask) {
 265                 if (cls) {
 266                         char buf[256];
 267                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 268                         be_dump(irg, buf, dump_func);
 269                 }
 270                 else
 271                         be_dump(irg, suffix, dump_func);
 272         }
 273 }
 274
 275 static void put_ignore_colors(be_chordal_env_t *chordal_env)
 276 {
 277         int n_colors = chordal_env->cls->n_regs;
 278         int i;
 279
 280         bitset_clear_all(chordal_env->ignore_colors);
 281         be_abi_put_ignore_regs(chordal_env->birg->abi, chordal_env->cls, chordal_env->ignore_colors);
 282         for(i = 0; i < n_colors; ++i)
 283                 if(arch_register_type_is(&chordal_env->cls->regs[i], ignore))
 284                         bitset_set(chordal_env->ignore_colors, i);
 285 }
 286
 287 FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix)
 288 {
 289         char buf[1024];
 290
 291         ir_snprintf(buf, sizeof(buf), "%s%F_%s.%s", prefix, env->irg, env->cls->name, suffix);
 292         return fopen(buf, "wt");
 293 }
 294
 295 void check_ifg_implementations(be_chordal_env_t *chordal_env)
 296 {
 297         FILE *f;
 298
 299         f = be_chordal_open(chordal_env, "std", "log");
 300         chordal_env->ifg = be_ifg_std_new(chordal_env);
 301         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 302         fclose(f);
 303
 304         f = be_chordal_open(chordal_env, "list", "log");
 305         be_ifg_free(chordal_env->ifg);
 306         chordal_env->ifg = be_ifg_list_new(chordal_env);
 307         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 308         fclose(f);
 309
 310         f = be_chordal_open(chordal_env, "clique", "log");
 311         be_ifg_free(chordal_env->ifg);
 312         chordal_env->ifg = be_ifg_clique_new(chordal_env);
 313         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 314         fclose(f);
 315
 316         f = be_chordal_open(chordal_env, "pointer", "log");
 317         be_ifg_free(chordal_env->ifg);
 318         chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 319         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 320         fclose(f);
 321
 322         chordal_env->ifg = NULL;
 323 };
 324
 325 static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 326 {
 327         const be_main_env_t *main_env  = bi->main_env;
 328         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 329         ir_graph            *irg       = bi->irg;
 330         be_options_t        *main_opts = main_env->options;
 331         copy_opt_t          *co;
 332
 333         int j, m;
 334         be_chordal_env_t chordal_env;
 335
 336         if (main_opts->timing == BE_TIME_ON) {
 337                 ra_timer.t_prolog  = lc_timer_register("prolog",   "regalloc prolog");
 338                 ra_timer.t_epilog  = lc_timer_register("epilog",   "regalloc epilog");
 339                 ra_timer.t_live    = lc_timer_register("liveness", "be liveness");
 340                 ra_timer.t_spill   = lc_timer_register("spill",    "spiller");
 341                 ra_timer.t_color   = lc_timer_register("color",    "graph coloring");
 342                 ra_timer.t_ifg     = lc_timer_register("ifg",      "build interference graph");
 343                 ra_timer.t_copymin = lc_timer_register("copymin",  "copy minimization");
 344                 ra_timer.t_ssa     = lc_timer_register("ssadestr", "ssa destruction");
 345
 346                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 347                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 348                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 349                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 350                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 351                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 352                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 353                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 354         }
 355
 356 #define BE_TIME_START(timer) if (main_opts->timing == BE_TIME_ON) lc_timer_start(timer)
 357 #define BE_TIME_STOP(timer)  if (main_opts->timing == BE_TIME_ON) lc_timer_stop(timer)
 358
 359         BE_TIME_START(ra_timer.t_prolog);
 360
 361         compute_doms(irg);
 362
 363         chordal_env.opts          = &options;
 364         chordal_env.irg           = irg;
 365         chordal_env.birg          = bi;
 366         chordal_env.dom_front     = be_compute_dominance_frontiers(irg);
 367         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 368
 369         obstack_init(&chordal_env.obst);
 370
 371         BE_TIME_STOP(ra_timer.t_prolog);
 372
 373         /* Perform the following for each register class. */
 374         for(j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 375                 FILE *f;
 376                 chordal_env.cls           = arch_isa_get_reg_class(isa, j);
 377                 chordal_env.border_heads  = pmap_create();
 378                 chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 379
 380                 BE_TIME_START(ra_timer.t_live);
 381
 382                 /* put all ignore registers into the ignore register set. */
 383                 put_ignore_colors(&chordal_env);
 384
 385                 be_liveness(irg);
 386                 dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 387
 388                 BE_TIME_STOP(ra_timer.t_live);
 389                 BE_TIME_START(ra_timer.t_spill);
 390
 391                 /* spilling */
 392                 switch(options.spill_method) {
 393                 case BE_CH_SPILL_MORGAN:
 394                         be_spill_morgan(&chordal_env);
 395                         break;
 396                 case BE_CH_SPILL_BELADY:
 397                         be_spill_belady(&chordal_env);
 398                         break;
 399 #ifdef WITH_ILP
 400                 case BE_CH_SPILL_ILP:
 401                         be_spill_ilp(&chordal_env);
 402                         break;
 403                 case BE_CH_SPILL_REMAT:
 404                         be_spill_remat(&chordal_env);
 405                         break;
 406                 case BE_CH_SPILL_APPEL:
 407                         be_spill_appel(&chordal_env);
 408                         break;
 409 #endif /* WITH_ILP */
 410                 default:
 411                         fprintf(stderr, "no valid spiller selected. falling back to belady\n");
 412                         be_spill_belady(&chordal_env);
 413                 }
 414                 dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
 415                 be_abi_fix_stack_nodes(bi->abi);
 416
 417                 /* verify schedule and register pressure */
 418                 if (options.vrfy_option == BE_CH_VRFY_WARN) {
 419                         be_verify_schedule(irg);
 420                         be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg);
 421                 }
 422                 else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 423                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 424                         assert(be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg)
 425                                 && "Register pressure verification failed");
 426                 }
 427
 428                 BE_TIME_STOP(ra_timer.t_spill);
 429                 BE_TIME_START(ra_timer.t_live);
 430                 be_liveness(irg);
 431                 BE_TIME_STOP(ra_timer.t_live);
 432
 433                 /* Color the graph. */
 434                 BE_TIME_START(ra_timer.t_color);
 435                 be_ra_chordal_color(&chordal_env);
 436                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
 437
 438                 BE_TIME_STOP(ra_timer.t_color);
 439                 BE_TIME_START(ra_timer.t_ifg);
 440                 //be_ifg_check_performance(&chordal_env);
 441
 442                 /* Create the ifg with the selected flavor */
 443                 switch (options.ifg_flavor) {
 444                         default:
 445                                 fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
 446                         case BE_CH_IFG_STD:
 447                         case BE_CH_IFG_FAST:
 448                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 449                                 break;
 450                         case BE_CH_IFG_CLIQUE:
 451                                 chordal_env.ifg = be_ifg_clique_new(&chordal_env);
 452                                 break;
 453                         case BE_CH_IFG_POINTER:
 454                                 chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
 455                                 break;
 456                         case BE_CH_IFG_LIST:
 457                                 chordal_env.ifg = be_ifg_list_new(&chordal_env);
 458                                 break;
 459                         case BE_CH_IFG_CHECK:
 460                                 check_ifg_implementations(&chordal_env);
 461                                 /* Build the interference graph. */
 462                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 463                                 //be_ifg_check(chordal_env.ifg);
 464                                 //be_ifg_check_sorted(chordal_env.ifg);
 465                                 break;
 466                 }
 467
 468
 469 #if 0
 470                 {
 471                         be_ifg_t *std = be_ifg_std_new(&chordal_env);
 472                         f = be_chordal_open(&chordal_env, "std", "csv");
 473                         be_ifg_check_sorted_to_file(std, f);
 474                         be_ifg_free(std);
 475                         fclose(f);
 476                 }
 477
 478                 f = be_chordal_open(&chordal_env, "clique", "csv");
 479                 be_ifg_check_sorted_to_file(chordal_env.ifg, f);
 480                 fclose(f);
 481 #endif
 482                 if (options.vrfy_option != BE_CH_VRFY_OFF)
 483                         be_ra_chordal_check(&chordal_env);
 484
 485 //              be_ifg_check_sorted(chordal_env.ifg);
 486
 487                 BE_TIME_STOP(ra_timer.t_ifg);
 488                 BE_TIME_START(ra_timer.t_copymin);
 489
 490                 /* copy minimization */
 491                 co = NULL;
 492                 if (options.copymin_method != BE_CH_COPYMIN_NONE && options.copymin_method != BE_CH_COPYMIN_STAT) {
 493                         co = new_copy_opt(&chordal_env, co_get_costs_loop_depth);
 494                         co_build_ou_structure(co);
 495                         co_build_graph_structure(co);
 496                 }
 497
 498                 switch(options.copymin_method) {
 499                         case BE_CH_COPYMIN_HEUR1:
 500                                 co_solve_heuristic(co);
 501                                 break;
 502                         case BE_CH_COPYMIN_HEUR2:
 503                                 co_solve_heuristic_new(co);
 504                                 break;
 505                         case BE_CH_COPYMIN_PARK_MOON:
 506                                 co_solve_park_moon(co);
 507                                 break;
 508                         case BE_CH_COPYMIN_STAT:
 509                                 co_compare_solvers(&chordal_env);
 510                                 break;
 511 #ifdef WITH_ILP
 512                         case BE_CH_COPYMIN_ILP1:
 513                                 printf("FIXME: %s:%d ILP1 not yet implemented!\n", __FILE__, __LINE__);
 514                                 co_solve_ilp1(co, 60.0);
 515                                 break;
 516                         case BE_CH_COPYMIN_ILP2:
 517                                 co_solve_ilp2(co, 60.0);
 518                                 break;
 519 #endif /* WITH_ILP */
 520                         case BE_CH_COPYMIN_NONE:
 521                         default:
 522                                 break;
 523                 }
 524
 525                 if (co) {
 526                         co_free_graph_structure(co);
 527                         co_free_ou_structure(co);
 528                         free_copy_opt(co);
 529                 }
 530
 531                 dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 532                 if (options.vrfy_option != BE_CH_VRFY_OFF)
 533                         be_ra_chordal_check(&chordal_env);
 534
 535                 BE_TIME_STOP(ra_timer.t_copymin);
 536                 BE_TIME_START(ra_timer.t_ssa);
 537
 538                 /* ssa destruction */
 539                 be_ssa_destruction(&chordal_env);
 540                 dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
 541                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 542                         be_ssa_destruction_check(&chordal_env);
 543                         be_ra_chordal_check(&chordal_env);
 544                 }
 545
 546                 if (options.copymin_method == BE_CH_COPYMIN_STAT)
 547                         copystat_dump(irg);
 548
 549                 be_ifg_free(chordal_env.ifg);
 550                 pmap_destroy(chordal_env.border_heads);
 551                 bitset_free(chordal_env.ignore_colors);
 552
 553                 BE_TIME_STOP(ra_timer.t_ssa);
 554         }
 555
 556         BE_TIME_START(ra_timer.t_epilog);
 557
 558         be_compute_spill_offsets(&chordal_env);
 559
 560         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 561
 562         lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 563         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 564
 565         obstack_free(&chordal_env.obst, NULL);
 566         be_free_dominance_frontiers(chordal_env.dom_front);
 567
 568         BE_TIME_STOP(ra_timer.t_epilog);
 569
 570         if (main_opts->timing == BE_TIME_ON)
 571                 return &ra_timer;
 572         else
 573                 return NULL;
 574 }
 575
 576 const be_ra_t be_ra_chordal_allocator = {
 577 #ifdef WITH_LIBCORE
 578         be_ra_chordal_register_options,
 579 #endif
 580         be_ra_chordal_main
 581 };