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) 2005-2006 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 <time.h>
  17
  18 #include "obst.h"
  19 #include "pset.h"
  20 #include "list.h"
  21 #include "bitset.h"
  22 #include "iterator.h"
  23 #include "firm_config.h"
  24
  25 #ifdef WITH_LIBCORE
  26 #include <libcore/lc_opts.h>
  27 #include <libcore/lc_opts_enum.h>
  28 #include <libcore/lc_timing.h>
  29 #endif /* WITH_LIBCORE */
  30
  31 #include "ircons_t.h"
  32 #include "irmode_t.h"
  33 #include "irgraph_t.h"
  34 #include "irprintf_t.h"
  35 #include "irgwalk.h"
  36 #include "ircons.h"
  37 #include "irdump.h"
  38 #include "irdom.h"
  39 #include "ircons.h"
  40 #include "irbitset.h"
  41 #include "irnode.h"
  42 #include "ircons.h"
  43 #include "debug.h"
  44 #include "xmalloc.h"
  45 #include "execfreq.h"
  46
  47 #include "bechordal_t.h"
  48 #include "beabi.h"
  49 #include "bejavacoal.h"
  50 #include "beutil.h"
  51 #include "besched.h"
  52 #include "benumb_t.h"
  53 #include "besched_t.h"
  54 #include "belive_t.h"
  55 #include "bearch.h"
  56 #include "beifg_t.h"
  57 #include "beifg_impl.h"
  58 #include "benode_t.h"
  59 #include "bestatevent.h"
  60 #include "bestat.h"
  61
  62 #include "bespillbelady.h"
  63 #include "bespillmorgan.h"
  64 #include "bespillslots.h"
  65 #include "bespilloptions.h"
  66 #include "belower.h"
  67
  68 #ifdef WITH_ILP
  69 #include "bespillremat.h"
  70 #endif /* WITH_ILP */
  71
  72 #include "bejavacoal.h"
  73 #include "becopystat.h"
  74 #include "becopyopt.h"
  75 #include "bessadestr.h"
  76 #include "beverify.h"
  77 #include "bespillcost.h"
  78 #include "benode_t.h"
  79
  80 void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
  81         const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
  82         struct obstack ob;
  83         pmap_entry *pme;
  84         ir_node **nodes, *n1, *n2;
  85         int i, o;
  86         DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
  87
  88         /* Collect all irns */
  89         obstack_init(&ob);
  90         pmap_foreach(chordal_env->border_heads, pme) {
  91                 border_t *curr;
  92                 struct list_head *head = pme->value;
  93                 list_for_each_entry(border_t, curr, head, list)
  94                         if (curr->is_def && curr->is_real)
  95                                 if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
  96                                         obstack_ptr_grow(&ob, curr->irn);
  97         }
  98         obstack_ptr_grow(&ob, NULL);
  99         nodes = (ir_node **) obstack_finish(&ob);
 100
 101         /* Check them */
 102         for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
 103                 const arch_register_t *n1_reg, *n2_reg;
 104
 105                 n1_reg = arch_get_irn_register(arch_env, n1);
 106                 if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
 107                         DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
 108                         assert(0 && "Register constraint does not hold");
 109                 }
 110                 for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
 111                         n2_reg = arch_get_irn_register(arch_env, n2);
 112                         if (values_interfere(chordal_env->lv, n1, n2) && n1_reg == n2_reg) {
 113                                 DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned: %s\n", n1, n2, n1_reg->name));
 114                                 assert(0 && "Interfering values have the same color!");
 115                         }
 116                 }
 117         }
 118         obstack_free(&ob, NULL);
 119 }
 120
 121 int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
 122 {
 123         if(env->ifg)
 124                 return be_ifg_connected(env->ifg, a, b);
 125         else
 126                 return values_interfere(env->lv, a, b);
 127 }
 128
 129
 130 static be_ra_chordal_opts_t options = {
 131         BE_CH_DUMP_NONE,
 132         BE_CH_SPILL_BELADY,
 133         BE_CH_IFG_STD,
 134         BE_CH_LOWER_PERM_SWAP,
 135         BE_CH_VRFY_WARN,
 136 };
 137
 138 /** Enable extreme live range splitting. */
 139 static int be_elr_split = 0;
 140
 141 /** Assumed loop iteration count for execution frequency estimation. */
 142 static int be_loop_weight = 9;
 143
 144 #ifdef WITH_LIBCORE
 145 static be_ra_timer_t ra_timer = {
 146         NULL,
 147         NULL,
 148         NULL,
 149         NULL,
 150         NULL,
 151         NULL,
 152         NULL,
 153         NULL,
 154         NULL,
 155         NULL,
 156         NULL,
 157 };
 158
 159 static const lc_opt_enum_int_items_t spill_items[] = {
 160         { "morgan", BE_CH_SPILL_MORGAN },
 161         { "belady", BE_CH_SPILL_BELADY },
 162 #ifdef WITH_ILP
 163         { "remat",  BE_CH_SPILL_REMAT },
 164 #endif /* WITH_ILP */
 165         { NULL, 0 }
 166 };
 167
 168 static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
 169         { "std",     BE_CH_IFG_STD     },
 170         { "fast",    BE_CH_IFG_FAST    },
 171         { "clique",  BE_CH_IFG_CLIQUE  },
 172         { "pointer", BE_CH_IFG_POINTER },
 173         { "list",    BE_CH_IFG_LIST    },
 174         { "check",   BE_CH_IFG_CHECK   },
 175         { NULL,      0                 }
 176 };
 177
 178 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 179         { "copy", BE_CH_LOWER_PERM_COPY },
 180         { "swap", BE_CH_LOWER_PERM_SWAP },
 181         { NULL, 0 }
 182 };
 183
 184 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 185         { NULL, 0 }
 186 };
 187
 188 static const lc_opt_enum_int_items_t dump_items[] = {
 189         { "spill",      BE_CH_DUMP_SPILL      },
 190         { "live",       BE_CH_DUMP_LIVE       },
 191         { "color",      BE_CH_DUMP_COLOR      },
 192         { "copymin",    BE_CH_DUMP_COPYMIN    },
 193         { "ssadestr",   BE_CH_DUMP_SSADESTR   },
 194         { "tree",       BE_CH_DUMP_TREE_INTV  },
 195         { "constr",     BE_CH_DUMP_CONSTR     },
 196         { "lower",      BE_CH_DUMP_LOWER      },
 197         { "spillslots", BE_CH_DUMP_SPILLSLOTS },
 198         { "appel",      BE_CH_DUMP_APPEL      },
 199         { "all",        BE_CH_DUMP_ALL        },
 200         { NULL, 0 }
 201 };
 202
 203 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 204         { "off",    BE_CH_VRFY_OFF    },
 205         { "warn",   BE_CH_VRFY_WARN   },
 206         { "assert", BE_CH_VRFY_ASSERT },
 207         { NULL, 0 }
 208 };
 209
 210 static lc_opt_enum_int_var_t spill_var = {
 211         &options.spill_method, spill_items
 212 };
 213
 214 static lc_opt_enum_int_var_t ifg_flavor_var = {
 215         &options.ifg_flavor, ifg_flavor_items
 216 };
 217
 218 static lc_opt_enum_int_var_t lower_perm_var = {
 219         &options.lower_perm_opt, lower_perm_items
 220 };
 221
 222 static lc_opt_enum_int_var_t dump_var = {
 223         &options.dump_flags, dump_items
 224 };
 225
 226 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 227         &options.vrfy_option, be_ch_vrfy_items
 228 };
 229
 230 static const lc_opt_table_entry_t be_chordal_options[] = {
 231         LC_OPT_ENT_ENUM_INT ("spill",         "spill method", &spill_var),
 232         LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour", &ifg_flavor_var),
 233         LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options", &lower_perm_var),
 234         LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
 235         LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options", &be_ch_vrfy_var),
 236         LC_OPT_ENT_BOOL     ("elrsplit",      "enable extreme live range splitting", &be_elr_split),
 237         LC_OPT_ENT_INT      ("loop_weight",   "assumed amount of loop iterations for guessing the execution frequency", &be_loop_weight),
 238         { NULL }
 239 };
 240
 241 extern void be_spill_remat_register_options(lc_opt_entry_t *ent);
 242
 243
 244 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 245 {
 246         static int run_once = 0;
 247         lc_opt_entry_t *chordal_grp;
 248
 249         if (! run_once) {
 250                 run_once    = 1;
 251                 chordal_grp = lc_opt_get_grp(grp, "chordal");
 252
 253                 lc_opt_add_table(chordal_grp, be_chordal_options);
 254
 255                 co_register_options(chordal_grp);
 256                 be_java_coal_register_options(chordal_grp);
 257 #ifdef WITH_ILP
 258                 be_spill_remat_register_options(chordal_grp);
 259 #endif
 260                 be_spill_register_options(chordal_grp);
 261         }
 262 }
 263 #endif /* WITH_LIBCORE */
 264
 265 static void dump(unsigned mask, ir_graph *irg,
 266                                  const arch_register_class_t *cls,
 267                                  const char *suffix,
 268                                  void (*dump_func)(ir_graph *, const char *))
 269 {
 270         if((options.dump_flags & mask) == mask) {
 271                 if (cls) {
 272                         char buf[256];
 273                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 274                         be_dump(irg, buf, dump_func);
 275                 }
 276                 else
 277                         be_dump(irg, suffix, dump_func);
 278         }
 279 }
 280
 281 static void put_ignore_colors(be_chordal_env_t *chordal_env)
 282 {
 283         int n_colors = chordal_env->cls->n_regs;
 284         int i;
 285
 286         bitset_clear_all(chordal_env->ignore_colors);
 287         be_abi_put_ignore_regs(chordal_env->birg->abi, chordal_env->cls, chordal_env->ignore_colors);
 288         for(i = 0; i < n_colors; ++i)
 289                 if(arch_register_type_is(&chordal_env->cls->regs[i], ignore))
 290                         bitset_set(chordal_env->ignore_colors, i);
 291 }
 292
 293 FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix)
 294 {
 295         char buf[1024];
 296
 297         ir_snprintf(buf, sizeof(buf), "%s%F_%s%s", prefix, env->irg, env->cls->name, suffix);
 298         return fopen(buf, "wt");
 299 }
 300
 301 void check_ifg_implementations(be_chordal_env_t *chordal_env)
 302 {
 303         FILE *f;
 304
 305         f = be_chordal_open(chordal_env, "std", ".log");
 306         chordal_env->ifg = be_ifg_std_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, "list", ".log");
 311         be_ifg_free(chordal_env->ifg);
 312         chordal_env->ifg = be_ifg_list_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, "clique", ".log");
 317         be_ifg_free(chordal_env->ifg);
 318         chordal_env->ifg = be_ifg_clique_new(chordal_env);
 319         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 320         fclose(f);
 321
 322         f = be_chordal_open(chordal_env, "pointer", ".log");
 323         be_ifg_free(chordal_env->ifg);
 324         chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 325         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 326         fclose(f);
 327
 328         chordal_env->ifg = NULL;
 329 };
 330
 331 /**
 332  * Checks for every reload if it's user can perform the load on itself.
 333  */
 334 static void memory_operand_walker(ir_node *irn, void *env) {
 335         be_chordal_env_t *cenv = env;
 336         const arch_env_t *aenv = cenv->birg->main_env->arch_env;
 337         const ir_edge_t  *edge, *ne;
 338         ir_node          *block;
 339         ir_node          *spill;
 340
 341         if (! be_is_Reload(irn))
 342                 return;
 343
 344         /* always use addressmode, it's good for x86 */
 345 #if 0
 346         /* only use memory operands, if the reload is only used by 1 node */
 347         if(get_irn_n_edges(irn) > 1)
 348                 return;
 349 #endif
 350
 351         spill = be_get_Reload_mem(irn);
 352         block = get_nodes_block(irn);
 353
 354         foreach_out_edge_safe(irn, edge, ne) {
 355                 ir_node *src = get_edge_src_irn(edge);
 356                 int     pos  = get_edge_src_pos(edge);
 357
 358                 assert(src && "outedges broken!");
 359
 360                 if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 361                         DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
 362                         arch_perform_memory_operand(aenv, src, spill, pos);
 363                 }
 364         }
 365
 366         /* kill the Reload */
 367         if (get_irn_n_edges(irn) == 0) {
 368                 sched_remove(irn);
 369                 set_irn_n(irn, 0, new_Bad());
 370                 set_irn_n(irn, 1, new_Bad());
 371         }
 372 }
 373
 374 /**
 375  * Starts a walk for memory operands if supported by the backend.
 376  */
 377 static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 378         irg_walk_graph(chordal_env->irg, NULL, memory_operand_walker, chordal_env);
 379 }
 380
 381 /**
 382  * Sorry for doing stats again...
 383  */
 384 typedef struct _node_stat_t {
 385         unsigned int n_phis;      /**< Phis of the current register class. */
 386         unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
 387         unsigned int n_copies;    /**< Copies */
 388         unsigned int n_perms;     /**< Perms */
 389         unsigned int n_spills;    /**< Spill nodes */
 390         unsigned int n_reloads;   /**< Reloads */
 391 } node_stat_t;
 392
 393 struct node_stat_walker {
 394         node_stat_t *stat;
 395         const be_chordal_env_t *cenv;
 396         bitset_t *mem_phis;
 397 };
 398
 399 static void node_stat_walker(ir_node *irn, void *data)
 400 {
 401         struct node_stat_walker *env = data;
 402         const arch_env_t *aenv       = env->cenv->birg->main_env->arch_env;
 403
 404         if(arch_irn_consider_in_reg_alloc(aenv, env->cenv->cls, irn)) {
 405
 406                 /* if the node is a normal phi */
 407                 if(is_Phi(irn))
 408                         env->stat->n_phis++;
 409
 410                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
 411                         ++env->stat->n_spills;
 412
 413                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
 414                         ++env->stat->n_reloads;
 415
 416                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
 417                         ++env->stat->n_copies;
 418
 419                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
 420                         ++env->stat->n_perms;
 421         }
 422
 423         /* a mem phi is a PhiM with a mem phi operand or a Spill operand */
 424         else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
 425                 int i;
 426
 427                 for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
 428                         ir_node *op = get_irn_n(irn, i);
 429
 430                         if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
 431                                 bitset_add_irn(env->mem_phis, irn);
 432                                 env->stat->n_mem_phis++;
 433                                 break;
 434                         }
 435                 }
 436         }
 437 }
 438
 439 static void node_stats(const be_chordal_env_t *cenv, node_stat_t *stat)
 440 {
 441         struct node_stat_walker env;
 442
 443         memset(stat, 0, sizeof(stat[0]));
 444         env.cenv     = cenv;
 445         env.mem_phis = bitset_irg_malloc(cenv->irg);
 446         env.stat     = stat;
 447         irg_walk_graph(cenv->irg, NULL, node_stat_walker, &env);
 448         bitset_free(env.mem_phis);
 449 }
 450
 451 static void insn_count_walker(ir_node *irn, void *data)
 452 {
 453         int *cnt = data;
 454
 455         switch(get_irn_opcode(irn)) {
 456         case iro_Proj:
 457         case iro_Phi:
 458         case iro_Start:
 459         case iro_End:
 460                 break;
 461         default:
 462                 (*cnt)++;
 463         }
 464 }
 465
 466 static unsigned int count_insns(ir_graph *irg)
 467 {
 468         int cnt = 0;
 469         irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
 470         return cnt;
 471 }
 472
 473 #ifdef WITH_LIBCORE
 474 /**
 475  * Initialize all timers.
 476  */
 477 static void be_init_timer(be_options_t *main_opts)
 478 {
 479         if (main_opts->timing == BE_TIME_ON) {
 480                 ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
 481                 ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
 482                 ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
 483                 ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
 484                 ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
 485                 ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
 486                 ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
 487                 ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
 488                 ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
 489                 ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
 490                 ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 491
 492                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 493                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 494                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 495                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 496                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 497                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 498                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 499                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 500                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 501                 LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 502                 LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 503         }
 504 }
 505
 506 #define BE_TIMER_INIT(main_opts)        be_init_timer(main_opts)
 507
 508 #define BE_TIMER_PUSH(timer)                                                            \
 509         if (main_opts->timing == BE_TIME_ON) {                                              \
 510                 if (! lc_timer_push(timer)) {                                                   \
 511                         if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
 512                                 assert(!"Timer already on stack, cannot be pushed twice.");             \
 513                         else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
 514                                 fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 515                                         lc_timer_get_name(timer));                                          \
 516                 }                                                                               \
 517         }
 518 #define BE_TIMER_POP(timer)                                                                    \
 519         if (main_opts->timing == BE_TIME_ON) {                                                     \
 520                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 521                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                                          \
 522                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 523                 else if (options.vrfy_option == BE_CH_VRFY_WARN && tmp != timer)                       \
 524                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 525                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 526                 timer = tmp;                                                                           \
 527         }
 528 #else
 529
 530 #define BE_TIMER_INIT(main_opts)
 531 #define BE_TIMER_PUSH(timer)
 532 #define BE_TIMER_POP(timer)
 533
 534 #endif /* WITH_LIBCORE */
 535
 536 /**
 537  * Performs chordal register allocation for each register class on given irg.
 538  *
 539  * @param bi  Backend irg object
 540  * @return Structure containing timer for the single phases or NULL if no timing requested.
 541  */
 542 static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 543 {
 544         const be_main_env_t *main_env  = bi->main_env;
 545         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 546         ir_graph            *irg       = bi->irg;
 547         be_options_t        *main_opts = main_env->options;
 548         int                   splitted = 0;
 549
 550         int j, m;
 551         be_chordal_env_t chordal_env;
 552
 553         BE_TIMER_INIT(main_opts);
 554         BE_TIMER_PUSH(ra_timer.t_other);
 555         BE_TIMER_PUSH(ra_timer.t_prolog);
 556
 557         compute_doms(irg);
 558
 559         chordal_env.opts      = &options;
 560         chordal_env.irg       = irg;
 561         chordal_env.birg      = bi;
 562         chordal_env.dom_front = be_compute_dominance_frontiers(irg);
 563         chordal_env.exec_freq = bi->execfreqs;
 564         chordal_env.lv        = be_liveness(irg);
 565         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 566
 567         obstack_init(&chordal_env.obst);
 568
 569         BE_TIMER_POP(ra_timer.t_prolog);
 570
 571         be_stat_ev("insns_before", count_insns(irg));
 572
 573         /* Perform the following for each register class. */
 574         for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 575                 node_stat_t node_stat;
 576
 577                 chordal_env.cls           = arch_isa_get_reg_class(isa, j);
 578                 chordal_env.border_heads  = pmap_create();
 579                 chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 580
 581                 be_stat_tags[STAT_TAG_CLS] = chordal_env.cls->name;
 582
 583                 if(be_stat_ev_is_active()) {
 584                         be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 585
 586                         /* perform some node statistics. */
 587                         node_stats(&chordal_env, &node_stat);
 588                         be_stat_ev("phis_before_spill", node_stat.n_phis);
 589                 }
 590
 591                 /* put all ignore registers into the ignore register set. */
 592                 put_ignore_colors(&chordal_env);
 593
 594                 BE_TIMER_PUSH(ra_timer.t_live);
 595                 be_liveness_recompute(chordal_env.lv);
 596                 BE_TIMER_POP(ra_timer.t_live);
 597                 dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 598
 599                 be_pre_spill_prepare_constr(&chordal_env);
 600                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-constr-pre", dump_ir_block_graph_sched);
 601
 602                 BE_TIMER_PUSH(ra_timer.t_spill);
 603
 604                 /* spilling */
 605                 switch(options.spill_method) {
 606                 case BE_CH_SPILL_MORGAN:
 607                         be_spill_morgan(&chordal_env);
 608                         break;
 609                 case BE_CH_SPILL_BELADY:
 610                         be_spill_belady(&chordal_env);
 611                         break;
 612 #ifdef WITH_ILP
 613                 case BE_CH_SPILL_REMAT:
 614                         be_spill_remat(&chordal_env);
 615                         break;
 616 #endif /* WITH_ILP */
 617                 default:
 618                         fprintf(stderr, "no valid spiller selected. falling back to belady\n");
 619                         be_spill_belady(&chordal_env);
 620                 }
 621
 622                 BE_TIMER_POP(ra_timer.t_spill);
 623
 624                 if(be_stat_ev_is_active()) {
 625                         node_stats(&chordal_env, &node_stat);
 626                         be_stat_ev("phis_after_spill", node_stat.n_phis);
 627                         be_stat_ev("mem_phis", node_stat.n_mem_phis);
 628                         be_stat_ev("reloads", node_stat.n_reloads);
 629                         be_stat_ev("spills", node_stat.n_spills);
 630                 }
 631
 632                 DBG((chordal_env.dbg, LEVEL_1, "spill costs for %+F in regclass %s: %g\n",irg, chordal_env.cls->name, get_irg_spill_cost(&chordal_env)));
 633
 634                 dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
 635
 636                 check_for_memory_operands(&chordal_env);
 637
 638                 be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
 639
 640                 BE_TIMER_PUSH(ra_timer.t_verify);
 641
 642                 /* verify schedule and register pressure */
 643                 if (options.vrfy_option == BE_CH_VRFY_WARN) {
 644                         be_verify_schedule(irg);
 645                         be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg);
 646                 }
 647                 else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 648                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 649                         assert(be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg)
 650                                 && "Register pressure verification failed");
 651                 }
 652                 BE_TIMER_POP(ra_timer.t_verify);
 653
 654                 if (be_elr_split && ! splitted) {
 655                         extreme_liverange_splitting(&chordal_env);
 656                         splitted = 1;
 657                 }
 658
 659
 660                 /* Color the graph. */
 661                 BE_TIMER_PUSH(ra_timer.t_color);
 662                 be_ra_chordal_color(&chordal_env);
 663                 BE_TIMER_POP(ra_timer.t_color);
 664
 665                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
 666
 667                 /* Create the ifg with the selected flavor */
 668                 BE_TIMER_PUSH(ra_timer.t_ifg);
 669                 switch (options.ifg_flavor) {
 670                         default:
 671                                 fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
 672                         case BE_CH_IFG_STD:
 673                         case BE_CH_IFG_FAST:
 674                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 675                                 break;
 676                         case BE_CH_IFG_CLIQUE:
 677                                 chordal_env.ifg = be_ifg_clique_new(&chordal_env);
 678                                 break;
 679                         case BE_CH_IFG_POINTER:
 680                                 chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
 681                                 break;
 682                         case BE_CH_IFG_LIST:
 683                                 chordal_env.ifg = be_ifg_list_new(&chordal_env);
 684                                 break;
 685                         case BE_CH_IFG_CHECK:
 686                                 check_ifg_implementations(&chordal_env);
 687                                 /* Build the interference graph. */
 688                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 689                                 break;
 690                 }
 691                 BE_TIMER_POP(ra_timer.t_ifg);
 692
 693                 if(be_stat_ev_is_active()) {
 694                         be_ifg_stat_t stat;
 695                         be_ifg_stat(&chordal_env, &stat);
 696                         be_stat_ev("ifg_nodes", stat.n_nodes);
 697                         be_stat_ev("ifg_edges", stat.n_edges);
 698                         be_stat_ev("ifg_comps", stat.n_comps);
 699                 }
 700
 701                 BE_TIMER_PUSH(ra_timer.t_verify);
 702                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 703                         //be_ra_chordal_check(&chordal_env);
 704                 }
 705
 706                 BE_TIMER_POP(ra_timer.t_verify);
 707
 708                 if(be_stat_ev_is_active()) {
 709                         node_stats(&chordal_env, &node_stat);
 710                         be_stat_ev("perms_before_coal", node_stat.n_perms);
 711                         be_stat_ev("copies_before_coal", node_stat.n_copies);
 712                 }
 713
 714                 /* copy minimization */
 715                 BE_TIMER_PUSH(ra_timer.t_copymin);
 716                 co_driver(&chordal_env);
 717                 BE_TIMER_POP(ra_timer.t_copymin);
 718
 719                 dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 720
 721                 BE_TIMER_PUSH(ra_timer.t_verify);
 722
 723                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 724                         //be_ra_chordal_check(&chordal_env);
 725                 }
 726
 727                 BE_TIMER_POP(ra_timer.t_verify);
 728                 BE_TIMER_PUSH(ra_timer.t_ssa);
 729
 730                 /* ssa destruction */
 731                 be_ssa_destruction(&chordal_env);
 732
 733                 BE_TIMER_POP(ra_timer.t_ssa);
 734
 735                 dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
 736
 737                 BE_TIMER_PUSH(ra_timer.t_verify);
 738                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 739                         be_ssa_destruction_check(&chordal_env);
 740                         //be_ra_chordal_check(&chordal_env);
 741                 }
 742                 BE_TIMER_POP(ra_timer.t_verify);
 743
 744                 be_ifg_free(chordal_env.ifg);
 745                 pmap_destroy(chordal_env.border_heads);
 746                 bitset_free(chordal_env.ignore_colors);
 747
 748                 if(be_stat_ev_is_active()) {
 749                         node_stats(&chordal_env, &node_stat);
 750                         be_stat_ev("perms_after_coal", node_stat.n_perms);
 751                         be_stat_ev("copies_after_coal", node_stat.n_copies);
 752                 }
 753
 754                 be_stat_ev_pop();
 755         }
 756
 757         BE_TIMER_PUSH(ra_timer.t_spillslots);
 758
 759         be_coalesce_spillslots(&chordal_env);
 760         dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
 761
 762         BE_TIMER_POP(ra_timer.t_spillslots);
 763
 764         BE_TIMER_PUSH(ra_timer.t_verify);
 765
 766         /* verify spillslots */
 767         if (options.vrfy_option == BE_CH_VRFY_WARN) {
 768                 be_verify_spillslots(main_env->arch_env, irg);
 769         }
 770         else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 771                 assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
 772         }
 773         BE_TIMER_POP(ra_timer.t_verify);
 774
 775         BE_TIMER_PUSH(ra_timer.t_epilog);
 776
 777         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 778
 779         lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 780         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 781
 782         obstack_free(&chordal_env.obst, NULL);
 783         be_free_dominance_frontiers(chordal_env.dom_front);
 784         be_liveness_free(chordal_env.lv);
 785
 786         BE_TIMER_POP(ra_timer.t_epilog);
 787         BE_TIMER_POP(ra_timer.t_other);
 788
 789         be_stat_ev("insns_after", count_insns(irg));
 790
 791 #ifdef WITH_LIBCORE
 792         return main_opts->timing == BE_TIME_ON ? &ra_timer : NULL;
 793 #endif /* WITH_LIBCORE */
 794         return NULL;
 795 }
 796
 797 const be_ra_t be_ra_chordal_allocator = {
 798 #ifdef WITH_LIBCORE
 799         be_ra_chordal_register_options,
 800 #else
 801         NULL,
 802 #endif
 803         be_ra_chordal_main,
 804 };