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  * @cvs-id $Id$
   6  *
   7  * Copyright (C) 2005 Universitaet Karlsruhe
   8  * Released under the GPL
   9  *
  10  * Driver for the chordal register allocator.
  11  */
  12 #ifdef HAVE_CONFIG_H
  13 #include "config.h"
  14 #endif
  15
  16 #include "obst.h"
  17 #include "pset.h"
  18 #include "list.h"
  19 #include "bitset.h"
  20 #include "iterator.h"
  21 #include "firm_config.h"
  22
  23 #ifdef WITH_LIBCORE
  24 #include <libcore/lc_opts.h>
  25 #include <libcore/lc_opts_enum.h>
  26 #include <libcore/lc_timing.h>
  27 #endif /* WITH_LIBCORE */
  28
  29 #include "irmode_t.h"
  30 #include "irgraph_t.h"
  31 #include "irprintf_t.h"
  32 #include "irgwalk.h"
  33 #include "ircons.h"
  34 #include "irdump.h"
  35 #include "irdom.h"
  36 #include "ircons.h"
  37 #include "irbitset.h"
  38 #include "irnode.h"
  39 #include "ircons.h"
  40 #include "debug.h"
  41 #include "xmalloc.h"
  42 #include "execfreq.h"
  43
  44 #include "bechordal_t.h"
  45 #include "beabi.h"
  46 #include "bejavacoal.h"
  47 #include "beutil.h"
  48 #include "besched.h"
  49 #include "benumb_t.h"
  50 #include "besched_t.h"
  51 #include "belive_t.h"
  52 #include "bearch.h"
  53 #include "beifg_t.h"
  54 #include "beifg_impl.h"
  55 #include "benode_t.h"
  56
  57 #include "bespillbelady.h"
  58 #include "bespillmorgan.h"
  59 #include "bespillslots.h"
  60 #include "belower.h"
  61
  62 #ifdef WITH_ILP
  63 #include "bespillremat.h"
  64 #endif /* WITH_ILP */
  65
  66 #include "bejavacoal.h"
  67 #include "becopystat.h"
  68 #include "becopyopt.h"
  69 #include "bessadestr.h"
  70 #include "beverify.h"
  71 #include "bespillcost.h"
  72 #include "benode_t.h"
  73
  74 void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
  75         const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
  76         struct obstack ob;
  77         pmap_entry *pme;
  78         ir_node **nodes, *n1, *n2;
  79         int i, o;
  80         DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
  81
  82         /* Collect all irns */
  83         obstack_init(&ob);
  84         pmap_foreach(chordal_env->border_heads, pme) {
  85                 border_t *curr;
  86                 struct list_head *head = pme->value;
  87                 list_for_each_entry(border_t, curr, head, list)
  88                         if (curr->is_def && curr->is_real)
  89                                 if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
  90                                         obstack_ptr_grow(&ob, curr->irn);
  91         }
  92         obstack_ptr_grow(&ob, NULL);
  93         nodes = (ir_node **) obstack_finish(&ob);
  94
  95         /* Check them */
  96         for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
  97                 const arch_register_t *n1_reg, *n2_reg;
  98
  99                 n1_reg = arch_get_irn_register(arch_env, n1);
 100                 if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
 101                         DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
 102                         assert(0 && "Register constraint does not hold");
 103                 }
 104                 for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
 105                         n2_reg = arch_get_irn_register(arch_env, n2);
 106                         if (values_interfere(chordal_env->lv, n1, n2) && n1_reg == n2_reg) {
 107                                 DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned: %s\n", n1, n2, n1_reg->name));
 108                                 assert(0 && "Interfering values have the same color!");
 109                         }
 110                 }
 111         }
 112         obstack_free(&ob, NULL);
 113 }
 114
 115 int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
 116 {
 117         if(env->ifg)
 118                 return be_ifg_connected(env->ifg, a, b);
 119         else
 120                 return values_interfere(env->lv, a, b);
 121 }
 122
 123
 124 static be_ra_chordal_opts_t options = {
 125         BE_CH_DUMP_NONE,
 126         BE_CH_SPILL_BELADY,
 127         BE_CH_IFG_STD,
 128         BE_CH_LOWER_PERM_SWAP,
 129         BE_CH_VRFY_WARN,
 130 };
 131
 132 static be_ra_timer_t ra_timer = {
 133         NULL,
 134         NULL,
 135         NULL,
 136         NULL,
 137         NULL,
 138         NULL,
 139         NULL,
 140         NULL,
 141         NULL,
 142         NULL,
 143         NULL,
 144 };
 145
 146 #ifdef WITH_LIBCORE
 147 static const lc_opt_enum_int_items_t spill_items[] = {
 148         { "morgan", BE_CH_SPILL_MORGAN },
 149         { "belady", BE_CH_SPILL_BELADY },
 150 #ifdef WITH_ILP
 151         { "remat",  BE_CH_SPILL_REMAT },
 152 #endif /* WITH_ILP */
 153         { NULL, 0 }
 154 };
 155
 156 static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
 157         { "std",     BE_CH_IFG_STD     },
 158         { "fast",    BE_CH_IFG_FAST    },
 159         { "clique",  BE_CH_IFG_CLIQUE  },
 160         { "pointer", BE_CH_IFG_POINTER },
 161         { "list",    BE_CH_IFG_LIST    },
 162         { "check",   BE_CH_IFG_CHECK   },
 163         { NULL,      0                 }
 164 };
 165
 166 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 167         { "copy", BE_CH_LOWER_PERM_COPY },
 168         { "swap", BE_CH_LOWER_PERM_SWAP },
 169         { NULL, 0 }
 170 };
 171
 172 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 173         { NULL, 0 }
 174 };
 175
 176 static const lc_opt_enum_int_items_t dump_items[] = {
 177         { "spill",      BE_CH_DUMP_SPILL      },
 178         { "live",       BE_CH_DUMP_LIVE       },
 179         { "color",      BE_CH_DUMP_COLOR      },
 180         { "copymin",    BE_CH_DUMP_COPYMIN    },
 181         { "ssadestr",   BE_CH_DUMP_SSADESTR   },
 182         { "tree",       BE_CH_DUMP_TREE_INTV  },
 183         { "constr",     BE_CH_DUMP_CONSTR     },
 184         { "lower",      BE_CH_DUMP_LOWER      },
 185         { "spillslots", BE_CH_DUMP_SPILLSLOTS },
 186         { "appel",      BE_CH_DUMP_APPEL      },
 187         { "all",        BE_CH_DUMP_ALL        },
 188         { NULL, 0 }
 189 };
 190
 191 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 192         { "off",    BE_CH_VRFY_OFF    },
 193         { "warn",   BE_CH_VRFY_WARN   },
 194         { "assert", BE_CH_VRFY_ASSERT },
 195         { NULL, 0 }
 196 };
 197
 198 static lc_opt_enum_int_var_t spill_var = {
 199         &options.spill_method, spill_items
 200 };
 201
 202 static lc_opt_enum_int_var_t ifg_flavor_var = {
 203         &options.ifg_flavor, ifg_flavor_items
 204 };
 205
 206 static lc_opt_enum_int_var_t lower_perm_var = {
 207         &options.lower_perm_opt, lower_perm_items
 208 };
 209
 210 static lc_opt_enum_int_var_t dump_var = {
 211         &options.dump_flags, dump_items
 212 };
 213
 214 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 215         &options.vrfy_option, be_ch_vrfy_items
 216 };
 217
 218 /** Enable extreme live range splitting. */
 219 static int be_elr_split = 0;
 220
 221 /** Assumed loop iteration count for execution frequency estimation. */
 222 static int be_loop_weight = 9;
 223
 224 static const lc_opt_table_entry_t be_chordal_options[] = {
 225         LC_OPT_ENT_ENUM_INT ("spill",         "spill method (belady, morgan or remat)", &spill_var),
 226         LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour (std, fast, clique, pointer, list, check)", &ifg_flavor_var),
 227         LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options (copy or swap)", &lower_perm_var),
 228         LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
 229         LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options (off, warn, assert)", &be_ch_vrfy_var),
 230         LC_OPT_ENT_BOOL     ("elrsplit",      "enable extreme live range splitting", &be_elr_split),
 231         LC_OPT_ENT_INT      ("loop_weight",   "assumed amount of loop iterations for guessing the execution frequency", &be_loop_weight),
 232         { NULL }
 233 };
 234
 235 extern void be_spill_remat_register_options(lc_opt_entry_t *ent);
 236
 237
 238 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 239 {
 240         static int run_once = 0;
 241         lc_opt_entry_t *chordal_grp;
 242
 243         if (! run_once) {
 244                 run_once    = 1;
 245                 chordal_grp = lc_opt_get_grp(grp, "chordal");
 246
 247                 lc_opt_add_table(chordal_grp, be_chordal_options);
 248         }
 249
 250         co_register_options(chordal_grp);
 251         be_java_coal_register_options(chordal_grp);
 252 #ifdef WITH_ILP
 253         be_spill_remat_register_options(chordal_grp);
 254 #endif
 255 }
 256 #endif /* WITH_LIBCORE */
 257
 258 static void dump(unsigned mask, ir_graph *irg,
 259                                  const arch_register_class_t *cls,
 260                                  const char *suffix,
 261                                  void (*dump_func)(ir_graph *, const char *))
 262 {
 263         if((options.dump_flags & mask) == mask) {
 264                 if (cls) {
 265                         char buf[256];
 266                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 267                         be_dump(irg, buf, dump_func);
 268                 }
 269                 else
 270                         be_dump(irg, suffix, dump_func);
 271         }
 272 }
 273
 274 static void put_ignore_colors(be_chordal_env_t *chordal_env)
 275 {
 276         int n_colors = chordal_env->cls->n_regs;
 277         int i;
 278
 279         bitset_clear_all(chordal_env->ignore_colors);
 280         be_abi_put_ignore_regs(chordal_env->birg->abi, chordal_env->cls, chordal_env->ignore_colors);
 281         for(i = 0; i < n_colors; ++i)
 282                 if(arch_register_type_is(&chordal_env->cls->regs[i], ignore))
 283                         bitset_set(chordal_env->ignore_colors, i);
 284 }
 285
 286 FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix)
 287 {
 288         char buf[1024];
 289
 290         ir_snprintf(buf, sizeof(buf), "%s%F_%s%s", prefix, env->irg, env->cls->name, suffix);
 291         return fopen(buf, "wt");
 292 }
 293
 294 void check_ifg_implementations(be_chordal_env_t *chordal_env)
 295 {
 296         FILE *f;
 297
 298         f = be_chordal_open(chordal_env, "std", ".log");
 299         chordal_env->ifg = be_ifg_std_new(chordal_env);
 300         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 301         fclose(f);
 302
 303         f = be_chordal_open(chordal_env, "list", ".log");
 304         be_ifg_free(chordal_env->ifg);
 305         chordal_env->ifg = be_ifg_list_new(chordal_env);
 306         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 307         fclose(f);
 308
 309         f = be_chordal_open(chordal_env, "clique", ".log");
 310         be_ifg_free(chordal_env->ifg);
 311         chordal_env->ifg = be_ifg_clique_new(chordal_env);
 312         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 313         fclose(f);
 314
 315         f = be_chordal_open(chordal_env, "pointer", ".log");
 316         be_ifg_free(chordal_env->ifg);
 317         chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 318         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 319         fclose(f);
 320
 321         chordal_env->ifg = NULL;
 322 };
 323
 324 /**
 325  * Checks for every reload if it's user can perform the load on itself.
 326  */
 327 static void memory_operand_walker(ir_node *irn, void *env) {
 328         be_chordal_env_t *cenv = env;
 329         const arch_env_t *aenv = cenv->birg->main_env->arch_env;
 330         const ir_edge_t  *edge, *ne;
 331         ir_node          *block;
 332         ir_node          *spill;
 333
 334         if (! be_is_Reload(irn))
 335                 return;
 336
 337         // only use memory operands, if the reload is only used by 1 node
 338         if(get_irn_n_edges(irn) > 1)
 339                 return;
 340
 341         spill = be_get_Reload_mem(irn);
 342         block = get_nodes_block(irn);
 343
 344         foreach_out_edge_safe(irn, edge, ne) {
 345                 ir_node *src = get_edge_src_irn(edge);
 346                 int     pos  = get_edge_src_pos(edge);
 347
 348                 if (! src)
 349                         continue;
 350
 351                 if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 352                         DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
 353                         arch_perform_memory_operand(aenv, src, spill, pos);
 354                 }
 355         }
 356
 357         /* kill the Reload */
 358         if (get_irn_n_edges(irn) == 0) {
 359                 sched_remove(irn);
 360                 set_irn_n(irn, 0, new_Bad());
 361                 set_irn_n(irn, 1, new_Bad());
 362         }
 363 }
 364
 365 /**
 366  * Starts a walk for memory operands if supported by the backend.
 367  */
 368 static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 369         irg_walk_graph(chordal_env->irg, NULL, memory_operand_walker, chordal_env);
 370 }
 371
 372 /**
 373  * Performs chordal register allocation for each register class on given irg.
 374  *
 375  * @param bi  Backend irg object
 376  * @return Structure containing timer for the single phases or NULL if no timing requested.
 377  */
 378 static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 379 {
 380         const be_main_env_t *main_env  = bi->main_env;
 381         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 382         ir_graph            *irg       = bi->irg;
 383         be_options_t        *main_opts = main_env->options;
 384         int                  splitted  = 0;
 385
 386         int j, m;
 387         be_chordal_env_t chordal_env;
 388
 389         if (main_opts->timing == BE_TIME_ON) {
 390                 ra_timer.t_prolog  = lc_timer_register("ra_prolog",   "regalloc prolog");
 391                 ra_timer.t_epilog  = lc_timer_register("ra_epilog",   "regalloc epilog");
 392                 ra_timer.t_live    = lc_timer_register("ra_liveness", "be liveness");
 393                 ra_timer.t_spill   = lc_timer_register("ra_spill",    "spiller");
 394                 ra_timer.t_spillslots = lc_timer_register("ra_spillslots",    "spillslots");
 395                 ra_timer.t_color   = lc_timer_register("ra_color",    "graph coloring");
 396                 ra_timer.t_ifg     = lc_timer_register("ra_ifg",      "interference graph");
 397                 ra_timer.t_copymin = lc_timer_register("ra_copymin",  "copy minimization");
 398                 ra_timer.t_ssa     = lc_timer_register("ra_ssadestr", "ssa destruction");
 399                 ra_timer.t_verify  = lc_timer_register("ra_verify",   "graph verification");
 400                 ra_timer.t_other   = lc_timer_register("ra_other",    "other time");
 401
 402                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 403                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 404                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 405                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 406                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 407                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 408                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 409                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 410                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 411                 LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 412                 LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 413         }
 414
 415 #define BE_TIMER_PUSH(timer)                                                        \
 416         if (main_opts->timing == BE_TIME_ON) {                                          \
 417                 int res = lc_timer_push(timer);                                             \
 418                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
 419                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 420                 else if (options.vrfy_option == BE_CH_VRFY_WARN && ! res)                   \
 421                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 422                                 lc_timer_get_name(timer));                                          \
 423         }
 424 #define BE_TIMER_POP(timer)                                                                    \
 425         if (main_opts->timing == BE_TIME_ON) {                                                     \
 426                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 427                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                                          \
 428                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 429                 else if (options.vrfy_option == BE_CH_VRFY_WARN && tmp != timer)                       \
 430                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 431                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 432                 timer = tmp;                                                                           \
 433         }
 434
 435         BE_TIMER_PUSH(ra_timer.t_other);
 436         BE_TIMER_PUSH(ra_timer.t_prolog);
 437
 438         compute_doms(irg);
 439
 440         chordal_env.opts      = &options;
 441         chordal_env.irg       = irg;
 442         chordal_env.birg      = bi;
 443         chordal_env.dom_front = be_compute_dominance_frontiers(irg);
 444         chordal_env.exec_freq = compute_execfreq(irg, be_loop_weight);
 445         chordal_env.lv        = be_liveness(irg);
 446         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 447
 448         obstack_init(&chordal_env.obst);
 449
 450         BE_TIMER_POP(ra_timer.t_prolog);
 451
 452         /* Perform the following for each register class. */
 453         for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 454                 chordal_env.cls           = arch_isa_get_reg_class(isa, j);
 455                 chordal_env.border_heads  = pmap_create();
 456                 chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 457
 458                 /* put all ignore registers into the ignore register set. */
 459                 put_ignore_colors(&chordal_env);
 460
 461                 BE_TIMER_PUSH(ra_timer.t_live);
 462                 be_liveness_recompute(chordal_env.lv);
 463                 BE_TIMER_POP(ra_timer.t_live);
 464                 dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 465
 466                 be_pre_spill_prepare_constr(&chordal_env);
 467                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-constr-pre", dump_ir_block_graph_sched);
 468
 469                 BE_TIMER_PUSH(ra_timer.t_spill);
 470
 471                 /* spilling */
 472                 switch(options.spill_method) {
 473                 case BE_CH_SPILL_MORGAN:
 474                         be_spill_morgan(&chordal_env);
 475                         break;
 476                 case BE_CH_SPILL_BELADY:
 477                         be_spill_belady(&chordal_env);
 478                         break;
 479 #ifdef WITH_ILP
 480                 case BE_CH_SPILL_REMAT:
 481                         be_spill_remat(&chordal_env);
 482                         break;
 483 #endif /* WITH_ILP */
 484                 default:
 485                         fprintf(stderr, "no valid spiller selected. falling back to belady\n");
 486                         be_spill_belady(&chordal_env);
 487                 }
 488
 489                 BE_TIMER_POP(ra_timer.t_spill);
 490
 491                 DBG((chordal_env.dbg, LEVEL_1, "spill costs for %+F in regclass %s: %g\n",
 492                       irg,
 493                       chordal_env.cls->name,
 494                       get_irg_spill_cost(&chordal_env))
 495                     );
 496
 497                 dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
 498
 499                 check_for_memory_operands(&chordal_env);
 500
 501                 be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
 502
 503                 BE_TIMER_PUSH(ra_timer.t_verify);
 504
 505                 /* verify schedule and register pressure */
 506                 if (options.vrfy_option == BE_CH_VRFY_WARN) {
 507                         be_verify_schedule(irg);
 508                         be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg);
 509                 }
 510                 else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 511                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 512                         assert(be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg)
 513                                 && "Register pressure verification failed");
 514                 }
 515                 BE_TIMER_POP(ra_timer.t_verify);
 516
 517                 if (be_elr_split && ! splitted) {
 518                         extreme_liverange_splitting(&chordal_env);
 519                         splitted = 1;
 520                 }
 521
 522
 523                 /* Color the graph. */
 524                 BE_TIMER_PUSH(ra_timer.t_color);
 525                 be_ra_chordal_color(&chordal_env);
 526                 BE_TIMER_POP(ra_timer.t_color);
 527
 528                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
 529
 530                 /* Create the ifg with the selected flavor */
 531                 BE_TIMER_PUSH(ra_timer.t_ifg);
 532                 switch (options.ifg_flavor) {
 533                         default:
 534                                 fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
 535                         case BE_CH_IFG_STD:
 536                         case BE_CH_IFG_FAST:
 537                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 538                                 break;
 539                         case BE_CH_IFG_CLIQUE:
 540                                 chordal_env.ifg = be_ifg_clique_new(&chordal_env);
 541                                 break;
 542                         case BE_CH_IFG_POINTER:
 543                                 chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
 544                                 break;
 545                         case BE_CH_IFG_LIST:
 546                                 chordal_env.ifg = be_ifg_list_new(&chordal_env);
 547                                 break;
 548                         case BE_CH_IFG_CHECK:
 549                                 check_ifg_implementations(&chordal_env);
 550                                 /* Build the interference graph. */
 551                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 552                                 break;
 553                 }
 554                 BE_TIMER_POP(ra_timer.t_ifg);
 555
 556                 BE_TIMER_PUSH(ra_timer.t_verify);
 557                 if (options.vrfy_option != BE_CH_VRFY_OFF)
 558                         be_ra_chordal_check(&chordal_env);
 559
 560                 BE_TIMER_POP(ra_timer.t_verify);
 561
 562                 /* copy minimization */
 563                 BE_TIMER_PUSH(ra_timer.t_copymin);
 564                 co_driver(&chordal_env);
 565                 BE_TIMER_POP(ra_timer.t_copymin);
 566                 dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 567
 568                 BE_TIMER_PUSH(ra_timer.t_verify);
 569
 570                 if (options.vrfy_option != BE_CH_VRFY_OFF)
 571                         be_ra_chordal_check(&chordal_env);
 572
 573                 BE_TIMER_POP(ra_timer.t_verify);
 574                 BE_TIMER_PUSH(ra_timer.t_ssa);
 575
 576                 /* ssa destruction */
 577                 be_ssa_destruction(&chordal_env);
 578
 579                 BE_TIMER_POP(ra_timer.t_ssa);
 580
 581                 dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
 582
 583                 BE_TIMER_PUSH(ra_timer.t_verify);
 584                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 585                         be_ssa_destruction_check(&chordal_env);
 586                         be_ra_chordal_check(&chordal_env);
 587                 }
 588                 BE_TIMER_POP(ra_timer.t_verify);
 589
 590                 be_ifg_free(chordal_env.ifg);
 591                 pmap_destroy(chordal_env.border_heads);
 592                 bitset_free(chordal_env.ignore_colors);
 593         }
 594
 595         BE_TIMER_PUSH(ra_timer.t_spillslots);
 596
 597         be_coalesce_spillslots(&chordal_env);
 598         dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
 599
 600         BE_TIMER_POP(ra_timer.t_spillslots);
 601
 602         BE_TIMER_PUSH(ra_timer.t_verify);
 603
 604         /* verify spillslots */
 605         if (options.vrfy_option == BE_CH_VRFY_WARN) {
 606                 be_verify_spillslots(main_env->arch_env, irg);
 607         }
 608         else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 609                 assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
 610         }
 611         BE_TIMER_POP(ra_timer.t_verify);
 612
 613         BE_TIMER_PUSH(ra_timer.t_epilog);
 614
 615         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 616
 617         lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 618         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 619
 620         obstack_free(&chordal_env.obst, NULL);
 621         be_free_dominance_frontiers(chordal_env.dom_front);
 622         be_liveness_free(chordal_env.lv);
 623         free_execfreq(chordal_env.exec_freq);
 624
 625         BE_TIMER_POP(ra_timer.t_epilog);
 626         BE_TIMER_POP(ra_timer.t_other);
 627
 628 #undef BE_TIMER_PUSH
 629 #undef BE_TIMER_POP
 630
 631         return main_opts->timing == BE_TIME_ON ? &ra_timer : NULL;
 632 }
 633
 634 const be_ra_t be_ra_chordal_allocator = {
 635 #ifdef WITH_LIBCORE
 636         be_ra_chordal_register_options,
 637 #endif
 638         be_ra_chordal_main
 639 };