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
  61 #include "bespillbelady.h"
  62 #include "bespillmorgan.h"
  63 #include "bespillslots.h"
  64 #include "bespilloptions.h"
  65 #include "belower.h"
  66
  67 #ifdef WITH_ILP
  68 #include "bespillremat.h"
  69 #endif /* WITH_ILP */
  70
  71 #include "bejavacoal.h"
  72 #include "becopystat.h"
  73 #include "becopyopt.h"
  74 #include "bessadestr.h"
  75 #include "beverify.h"
  76 #include "bespillcost.h"
  77 #include "benode_t.h"
  78
  79 void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
  80         const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
  81         struct obstack ob;
  82         pmap_entry *pme;
  83         ir_node **nodes, *n1, *n2;
  84         int i, o;
  85         DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
  86
  87         /* Collect all irns */
  88         obstack_init(&ob);
  89         pmap_foreach(chordal_env->border_heads, pme) {
  90                 border_t *curr;
  91                 struct list_head *head = pme->value;
  92                 list_for_each_entry(border_t, curr, head, list)
  93                         if (curr->is_def && curr->is_real)
  94                                 if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
  95                                         obstack_ptr_grow(&ob, curr->irn);
  96         }
  97         obstack_ptr_grow(&ob, NULL);
  98         nodes = (ir_node **) obstack_finish(&ob);
  99
 100         /* Check them */
 101         for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
 102                 const arch_register_t *n1_reg, *n2_reg;
 103
 104                 n1_reg = arch_get_irn_register(arch_env, n1);
 105                 if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
 106                         DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
 107                         assert(0 && "Register constraint does not hold");
 108                 }
 109                 for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
 110                         n2_reg = arch_get_irn_register(arch_env, n2);
 111                         if (values_interfere(chordal_env->lv, n1, n2) && n1_reg == n2_reg) {
 112                                 DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned: %s\n", n1, n2, n1_reg->name));
 113                                 assert(0 && "Interfering values have the same color!");
 114                         }
 115                 }
 116         }
 117         obstack_free(&ob, NULL);
 118 }
 119
 120 int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
 121 {
 122         if(env->ifg)
 123                 return be_ifg_connected(env->ifg, a, b);
 124         else
 125                 return values_interfere(env->lv, a, b);
 126 }
 127
 128
 129 static be_ra_chordal_opts_t options = {
 130         BE_CH_DUMP_NONE,
 131         BE_CH_SPILL_BELADY,
 132         BE_CH_IFG_STD,
 133         BE_CH_LOWER_PERM_SWAP,
 134         BE_CH_VRFY_WARN,
 135 };
 136
 137 /** The name of the file where the statistics are put to. */
 138 static char stat_file_name[2048];
 139
 140 /** Enable extreme live range splitting. */
 141 static int be_elr_split = 0;
 142
 143 /** Assumed loop iteration count for execution frequency estimation. */
 144 static int be_loop_weight = 9;
 145
 146 #ifdef WITH_LIBCORE
 147 static be_ra_timer_t ra_timer = {
 148         NULL,
 149         NULL,
 150         NULL,
 151         NULL,
 152         NULL,
 153         NULL,
 154         NULL,
 155         NULL,
 156         NULL,
 157         NULL,
 158         NULL,
 159 };
 160
 161 static const lc_opt_enum_int_items_t spill_items[] = {
 162         { "morgan", BE_CH_SPILL_MORGAN },
 163         { "belady", BE_CH_SPILL_BELADY },
 164 #ifdef WITH_ILP
 165         { "remat",  BE_CH_SPILL_REMAT },
 166 #endif /* WITH_ILP */
 167         { NULL, 0 }
 168 };
 169
 170 static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
 171         { "std",     BE_CH_IFG_STD     },
 172         { "fast",    BE_CH_IFG_FAST    },
 173         { "clique",  BE_CH_IFG_CLIQUE  },
 174         { "pointer", BE_CH_IFG_POINTER },
 175         { "list",    BE_CH_IFG_LIST    },
 176         { "check",   BE_CH_IFG_CHECK   },
 177         { NULL,      0                 }
 178 };
 179
 180 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 181         { "copy", BE_CH_LOWER_PERM_COPY },
 182         { "swap", BE_CH_LOWER_PERM_SWAP },
 183         { NULL, 0 }
 184 };
 185
 186 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 187         { NULL, 0 }
 188 };
 189
 190 static const lc_opt_enum_int_items_t dump_items[] = {
 191         { "spill",      BE_CH_DUMP_SPILL      },
 192         { "live",       BE_CH_DUMP_LIVE       },
 193         { "color",      BE_CH_DUMP_COLOR      },
 194         { "copymin",    BE_CH_DUMP_COPYMIN    },
 195         { "ssadestr",   BE_CH_DUMP_SSADESTR   },
 196         { "tree",       BE_CH_DUMP_TREE_INTV  },
 197         { "constr",     BE_CH_DUMP_CONSTR     },
 198         { "lower",      BE_CH_DUMP_LOWER      },
 199         { "spillslots", BE_CH_DUMP_SPILLSLOTS },
 200         { "appel",      BE_CH_DUMP_APPEL      },
 201         { "all",        BE_CH_DUMP_ALL        },
 202         { NULL, 0 }
 203 };
 204
 205 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 206         { "off",    BE_CH_VRFY_OFF    },
 207         { "warn",   BE_CH_VRFY_WARN   },
 208         { "assert", BE_CH_VRFY_ASSERT },
 209         { NULL, 0 }
 210 };
 211
 212 static lc_opt_enum_int_var_t spill_var = {
 213         &options.spill_method, spill_items
 214 };
 215
 216 static lc_opt_enum_int_var_t ifg_flavor_var = {
 217         &options.ifg_flavor, ifg_flavor_items
 218 };
 219
 220 static lc_opt_enum_int_var_t lower_perm_var = {
 221         &options.lower_perm_opt, lower_perm_items
 222 };
 223
 224 static lc_opt_enum_int_var_t dump_var = {
 225         &options.dump_flags, dump_items
 226 };
 227
 228 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 229         &options.vrfy_option, be_ch_vrfy_items
 230 };
 231
 232 static const lc_opt_table_entry_t be_chordal_options[] = {
 233         LC_OPT_ENT_STR      ("statfile",      "the name of the statisctics file", stat_file_name, sizeof(stat_file_name)),
 234         LC_OPT_ENT_ENUM_INT ("spill",         "spill method", &spill_var),
 235         LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour", &ifg_flavor_var),
 236         LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options", &lower_perm_var),
 237         LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
 238         LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options", &be_ch_vrfy_var),
 239         LC_OPT_ENT_BOOL     ("elrsplit",      "enable extreme live range splitting", &be_elr_split),
 240         LC_OPT_ENT_INT      ("loop_weight",   "assumed amount of loop iterations for guessing the execution frequency", &be_loop_weight),
 241         { NULL }
 242 };
 243
 244 extern void be_spill_remat_register_options(lc_opt_entry_t *ent);
 245
 246
 247 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 248 {
 249         static int run_once = 0;
 250         lc_opt_entry_t *chordal_grp;
 251
 252         if (! run_once) {
 253                 run_once    = 1;
 254                 chordal_grp = lc_opt_get_grp(grp, "chordal");
 255
 256                 lc_opt_add_table(chordal_grp, be_chordal_options);
 257
 258                 co_register_options(chordal_grp);
 259                 be_java_coal_register_options(chordal_grp);
 260 #ifdef WITH_ILP
 261                 be_spill_remat_register_options(chordal_grp);
 262 #endif
 263                 be_spill_register_options(chordal_grp);
 264         }
 265 }
 266 #endif /* WITH_LIBCORE */
 267
 268 static void dump(unsigned mask, ir_graph *irg,
 269                                  const arch_register_class_t *cls,
 270                                  const char *suffix,
 271                                  void (*dump_func)(ir_graph *, const char *))
 272 {
 273         if((options.dump_flags & mask) == mask) {
 274                 if (cls) {
 275                         char buf[256];
 276                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 277                         be_dump(irg, buf, dump_func);
 278                 }
 279                 else
 280                         be_dump(irg, suffix, dump_func);
 281         }
 282 }
 283
 284 static void put_ignore_colors(be_chordal_env_t *chordal_env)
 285 {
 286         int n_colors = chordal_env->cls->n_regs;
 287         int i;
 288
 289         bitset_clear_all(chordal_env->ignore_colors);
 290         be_abi_put_ignore_regs(chordal_env->birg->abi, chordal_env->cls, chordal_env->ignore_colors);
 291         for(i = 0; i < n_colors; ++i)
 292                 if(arch_register_type_is(&chordal_env->cls->regs[i], ignore))
 293                         bitset_set(chordal_env->ignore_colors, i);
 294 }
 295
 296 FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix)
 297 {
 298         char buf[1024];
 299
 300         ir_snprintf(buf, sizeof(buf), "%s%F_%s%s", prefix, env->irg, env->cls->name, suffix);
 301         return fopen(buf, "wt");
 302 }
 303
 304 void check_ifg_implementations(be_chordal_env_t *chordal_env)
 305 {
 306         FILE *f;
 307
 308         f = be_chordal_open(chordal_env, "std", ".log");
 309         chordal_env->ifg = be_ifg_std_new(chordal_env);
 310         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 311         fclose(f);
 312
 313         f = be_chordal_open(chordal_env, "list", ".log");
 314         be_ifg_free(chordal_env->ifg);
 315         chordal_env->ifg = be_ifg_list_new(chordal_env);
 316         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 317         fclose(f);
 318
 319         f = be_chordal_open(chordal_env, "clique", ".log");
 320         be_ifg_free(chordal_env->ifg);
 321         chordal_env->ifg = be_ifg_clique_new(chordal_env);
 322         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 323         fclose(f);
 324
 325         f = be_chordal_open(chordal_env, "pointer", ".log");
 326         be_ifg_free(chordal_env->ifg);
 327         chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 328         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 329         fclose(f);
 330
 331         chordal_env->ifg = NULL;
 332 };
 333
 334 /**
 335  * Checks for every reload if it's user can perform the load on itself.
 336  */
 337 static void memory_operand_walker(ir_node *irn, void *env) {
 338         be_chordal_env_t *cenv = env;
 339         const arch_env_t *aenv = cenv->birg->main_env->arch_env;
 340         const ir_edge_t  *edge, *ne;
 341         ir_node          *block;
 342         ir_node          *spill;
 343
 344         if (! be_is_Reload(irn))
 345                 return;
 346
 347         /* always use addressmode, it's good for x86 */
 348 #if 0
 349         /* only use memory operands, if the reload is only used by 1 node */
 350         if(get_irn_n_edges(irn) > 1)
 351                 return;
 352 #endif
 353
 354         spill = be_get_Reload_mem(irn);
 355         block = get_nodes_block(irn);
 356
 357         foreach_out_edge_safe(irn, edge, ne) {
 358                 ir_node *src = get_edge_src_irn(edge);
 359                 int     pos  = get_edge_src_pos(edge);
 360
 361                 if (! src)
 362                         continue;
 363
 364                 if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 365                         DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
 366                         arch_perform_memory_operand(aenv, src, spill, pos);
 367                 }
 368         }
 369
 370         /* kill the Reload */
 371         if (get_irn_n_edges(irn) == 0) {
 372                 sched_remove(irn);
 373                 set_irn_n(irn, 0, new_Bad());
 374                 set_irn_n(irn, 1, new_Bad());
 375         }
 376 }
 377
 378 /**
 379  * Starts a walk for memory operands if supported by the backend.
 380  */
 381 static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 382         irg_walk_graph(chordal_env->irg, NULL, memory_operand_walker, chordal_env);
 383 }
 384
 385 /**
 386  * Sorry for doing stats again...
 387  */
 388 typedef struct _node_stat_t {
 389         unsigned int n_phis;      /**< Phis of the current register class. */
 390         unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
 391         unsigned int n_copies;    /**< Copies */
 392         unsigned int n_perms;     /**< Perms */
 393         unsigned int n_spills;    /**< Spill nodes */
 394         unsigned int n_reloads;   /**< Reloads */
 395 } node_stat_t;
 396
 397 struct node_stat_walker {
 398         node_stat_t *stat;
 399         const be_chordal_env_t *cenv;
 400         bitset_t *mem_phis;
 401 };
 402
 403 static void node_stat_walker(ir_node *irn, void *data)
 404 {
 405         struct node_stat_walker *env = data;
 406         const arch_env_t *aenv       = env->cenv->birg->main_env->arch_env;
 407
 408         if(arch_irn_consider_in_reg_alloc(aenv, env->cenv->cls, irn)) {
 409
 410                 /* if the node is a normal phi */
 411                 if(is_Phi(irn))
 412                         env->stat->n_phis++;
 413
 414                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
 415                         ++env->stat->n_spills;
 416
 417                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
 418                         ++env->stat->n_reloads;
 419
 420                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
 421                         ++env->stat->n_copies;
 422
 423                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
 424                         ++env->stat->n_perms;
 425         }
 426
 427         /* a mem phi is a PhiM with a mem phi operand or a Spill operand */
 428         else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
 429                 int i;
 430
 431                 for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
 432                         ir_node *op = get_irn_n(irn, i);
 433
 434                         if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
 435                                 bitset_add_irn(env->mem_phis, irn);
 436                                 env->stat->n_mem_phis++;
 437                                 break;
 438                         }
 439                 }
 440         }
 441 }
 442
 443 static void node_stats(const be_chordal_env_t *cenv, node_stat_t *stat)
 444 {
 445         struct node_stat_walker env;
 446
 447         memset(stat, 0, sizeof(stat[0]));
 448         env.cenv     = cenv;
 449         env.mem_phis = bitset_irg_malloc(cenv->irg);
 450         env.stat     = stat;
 451         irg_walk_graph(cenv->irg, NULL, node_stat_walker, &env);
 452         bitset_free(env.mem_phis);
 453 }
 454
 455 static void insn_count_walker(ir_node *irn, void *data)
 456 {
 457         int *cnt = data;
 458
 459         switch(get_irn_opcode(irn)) {
 460         case iro_Proj:
 461         case iro_Phi:
 462         case iro_Start:
 463         case iro_End:
 464                 break;
 465         default:
 466                 (*cnt)++;
 467         }
 468 }
 469
 470 static unsigned int count_insns(ir_graph *irg)
 471 {
 472         int cnt = 0;
 473         irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
 474         return cnt;
 475 }
 476
 477 #ifdef WITH_LIBCORE
 478 /**
 479  * Initialize all timers.
 480  */
 481 static void be_init_timer(be_options_t *main_opts)
 482 {
 483         if (main_opts->timing == BE_TIME_ON) {
 484                 ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
 485                 ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
 486                 ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
 487                 ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
 488                 ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
 489                 ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
 490                 ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
 491                 ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
 492                 ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
 493                 ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
 494                 ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 495
 496                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 497                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 498                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 499                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 500                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 501                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 502                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 503                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 504                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 505                 LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 506                 LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 507         }
 508 }
 509
 510 #define BE_TIMER_INIT(main_opts)        be_init_timer(main_opts)
 511
 512 #define BE_TIMER_PUSH(timer)                                                            \
 513         if (main_opts->timing == BE_TIME_ON) {                                              \
 514                 if (! lc_timer_push(timer)) {                                                   \
 515                         if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
 516                                 assert(!"Timer already on stack, cannot be pushed twice.");             \
 517                         else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
 518                                 fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 519                                         lc_timer_get_name(timer));                                          \
 520                 }                                                                               \
 521         }
 522 #define BE_TIMER_POP(timer)                                                                    \
 523         if (main_opts->timing == BE_TIME_ON) {                                                     \
 524                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 525                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                                          \
 526                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 527                 else if (options.vrfy_option == BE_CH_VRFY_WARN && tmp != timer)                       \
 528                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 529                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 530                 timer = tmp;                                                                           \
 531         }
 532 #else
 533
 534 #define BE_TIMER_INIT(main_opts)
 535 #define BE_TIMER_PUSH(timer)
 536 #define BE_TIMER_POP(timer)
 537
 538 #endif /* WITH_LIBCORE */
 539
 540 enum {
 541         STAT_TAG_FILE = 0,
 542         STAT_TAG_TIME = 1,
 543         STAT_TAG_IRG  = 2,
 544         STAT_TAG_CLS  = 3,
 545         STAT_TAG_LAST
 546 };
 547
 548 /**
 549  * Performs chordal register allocation for each register class on given irg.
 550  *
 551  * @param bi  Backend irg object
 552  * @return Structure containing timer for the single phases or NULL if no timing requested.
 553  */
 554 static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 555 {
 556         const be_main_env_t *main_env  = bi->main_env;
 557         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 558         ir_graph            *irg       = bi->irg;
 559         be_options_t        *main_opts = main_env->options;
 560         int                   splitted = 0;
 561         FILE                *stat_file = NULL;
 562
 563         char time_str[32];
 564         char irg_name[128];
 565         int j, m, line;
 566         be_chordal_env_t chordal_env;
 567         const char *stat_tags[STAT_TAG_LAST];
 568
 569         /* if we want to do some statistics, push the environment. */
 570         if(strlen(stat_file_name) > 0 && (stat_file = fopen(stat_file_name, "at")) != NULL) {
 571
 572                 /* initialize the statistics tags */
 573                 ir_snprintf(time_str, sizeof(time_str),"%u", time(NULL));
 574                 ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
 575
 576                 stat_tags[STAT_TAG_FILE] = be_retrieve_dbg_info(get_entity_dbg_info(get_irg_entity(irg)), &line);
 577                 stat_tags[STAT_TAG_TIME] = time_str;
 578                 stat_tags[STAT_TAG_IRG]  = irg_name;
 579                 stat_tags[STAT_TAG_CLS]  = "<all>";
 580
 581                 be_stat_ev_push(stat_tags, STAT_TAG_LAST, stat_file);
 582         }
 583
 584         BE_TIMER_INIT(main_opts);
 585         BE_TIMER_PUSH(ra_timer.t_other);
 586         BE_TIMER_PUSH(ra_timer.t_prolog);
 587
 588         compute_doms(irg);
 589
 590         chordal_env.opts      = &options;
 591         chordal_env.irg       = irg;
 592         chordal_env.birg      = bi;
 593         chordal_env.dom_front = be_compute_dominance_frontiers(irg);
 594         chordal_env.exec_freq = bi->execfreqs;
 595                 /*compute_execfreq(irg, be_loop_weight);*/
 596         chordal_env.lv        = be_liveness(irg);
 597         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 598
 599         obstack_init(&chordal_env.obst);
 600
 601         BE_TIMER_POP(ra_timer.t_prolog);
 602
 603         be_stat_ev("insns_before", count_insns(irg));
 604
 605         /* Perform the following for each register class. */
 606         for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 607                 node_stat_t node_stat;
 608
 609                 chordal_env.cls           = arch_isa_get_reg_class(isa, j);
 610                 chordal_env.border_heads  = pmap_create();
 611                 chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 612
 613                 stat_tags[STAT_TAG_CLS] = chordal_env.cls->name;
 614
 615                 if(stat_file) {
 616                         be_stat_ev_push(stat_tags, STAT_TAG_LAST, stat_file);
 617
 618                         /* perform some node statistics. */
 619                         node_stats(&chordal_env, &node_stat);
 620                         be_stat_ev("phis_before_spill", node_stat.n_phis);
 621                 }
 622
 623                 /* put all ignore registers into the ignore register set. */
 624                 put_ignore_colors(&chordal_env);
 625
 626                 BE_TIMER_PUSH(ra_timer.t_live);
 627                 be_liveness_recompute(chordal_env.lv);
 628                 BE_TIMER_POP(ra_timer.t_live);
 629                 dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 630
 631                 be_pre_spill_prepare_constr(&chordal_env);
 632                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-constr-pre", dump_ir_block_graph_sched);
 633
 634                 BE_TIMER_PUSH(ra_timer.t_spill);
 635
 636                 /* spilling */
 637                 switch(options.spill_method) {
 638                 case BE_CH_SPILL_MORGAN:
 639                         be_spill_morgan(&chordal_env);
 640                         break;
 641                 case BE_CH_SPILL_BELADY:
 642                         be_spill_belady(&chordal_env);
 643                         break;
 644 #ifdef WITH_ILP
 645                 case BE_CH_SPILL_REMAT:
 646                         be_spill_remat(&chordal_env);
 647                         break;
 648 #endif /* WITH_ILP */
 649                 default:
 650                         fprintf(stderr, "no valid spiller selected. falling back to belady\n");
 651                         be_spill_belady(&chordal_env);
 652                 }
 653
 654                 BE_TIMER_POP(ra_timer.t_spill);
 655
 656                 if(stat_file) {
 657                         node_stats(&chordal_env, &node_stat);
 658                         be_stat_ev("phis_after_spill", node_stat.n_phis);
 659                         be_stat_ev("mem_phis", node_stat.n_mem_phis);
 660                         be_stat_ev("reloads", node_stat.n_reloads);
 661                         be_stat_ev("spills", node_stat.n_spills);
 662                 }
 663
 664                 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)));
 665
 666                 dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
 667
 668                 check_for_memory_operands(&chordal_env);
 669
 670                 be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
 671
 672                 BE_TIMER_PUSH(ra_timer.t_verify);
 673
 674                 /* verify schedule and register pressure */
 675                 if (options.vrfy_option == BE_CH_VRFY_WARN) {
 676                         be_verify_schedule(irg);
 677                         be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg);
 678                 }
 679                 else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 680                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 681                         assert(be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg)
 682                                 && "Register pressure verification failed");
 683                 }
 684                 BE_TIMER_POP(ra_timer.t_verify);
 685
 686                 if (be_elr_split && ! splitted) {
 687                         extreme_liverange_splitting(&chordal_env);
 688                         splitted = 1;
 689                 }
 690
 691
 692                 /* Color the graph. */
 693                 BE_TIMER_PUSH(ra_timer.t_color);
 694                 be_ra_chordal_color(&chordal_env);
 695                 BE_TIMER_POP(ra_timer.t_color);
 696
 697                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
 698
 699                 /* Create the ifg with the selected flavor */
 700                 BE_TIMER_PUSH(ra_timer.t_ifg);
 701                 switch (options.ifg_flavor) {
 702                         default:
 703                                 fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
 704                         case BE_CH_IFG_STD:
 705                         case BE_CH_IFG_FAST:
 706                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 707                                 break;
 708                         case BE_CH_IFG_CLIQUE:
 709                                 chordal_env.ifg = be_ifg_clique_new(&chordal_env);
 710                                 break;
 711                         case BE_CH_IFG_POINTER:
 712                                 chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
 713                                 break;
 714                         case BE_CH_IFG_LIST:
 715                                 chordal_env.ifg = be_ifg_list_new(&chordal_env);
 716                                 break;
 717                         case BE_CH_IFG_CHECK:
 718                                 check_ifg_implementations(&chordal_env);
 719                                 /* Build the interference graph. */
 720                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 721                                 break;
 722                 }
 723                 BE_TIMER_POP(ra_timer.t_ifg);
 724
 725                 if(stat_file) {
 726                         be_ifg_stat_t stat;
 727                         be_ifg_stat(&chordal_env, &stat);
 728                         be_stat_ev("ifg_nodes", stat.n_nodes);
 729                         be_stat_ev("ifg_edges", stat.n_edges);
 730                         be_stat_ev("ifg_comps", stat.n_comps);
 731                 }
 732
 733                 BE_TIMER_PUSH(ra_timer.t_verify);
 734                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 735                         //be_ra_chordal_check(&chordal_env);
 736                 }
 737
 738                 BE_TIMER_POP(ra_timer.t_verify);
 739
 740                 if(stat_file) {
 741                         node_stats(&chordal_env, &node_stat);
 742                         be_stat_ev("perms_before_coal", node_stat.n_perms);
 743                         be_stat_ev("copies_before_coal", node_stat.n_copies);
 744                 }
 745
 746                 /* copy minimization */
 747                 BE_TIMER_PUSH(ra_timer.t_copymin);
 748                 co_driver(&chordal_env);
 749                 BE_TIMER_POP(ra_timer.t_copymin);
 750
 751                 dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 752
 753                 BE_TIMER_PUSH(ra_timer.t_verify);
 754
 755                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 756                         //be_ra_chordal_check(&chordal_env);
 757                 }
 758
 759                 BE_TIMER_POP(ra_timer.t_verify);
 760                 BE_TIMER_PUSH(ra_timer.t_ssa);
 761
 762                 /* ssa destruction */
 763                 be_ssa_destruction(&chordal_env);
 764
 765                 BE_TIMER_POP(ra_timer.t_ssa);
 766
 767                 dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
 768
 769                 BE_TIMER_PUSH(ra_timer.t_verify);
 770                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 771                         be_ssa_destruction_check(&chordal_env);
 772                         //be_ra_chordal_check(&chordal_env);
 773                 }
 774                 BE_TIMER_POP(ra_timer.t_verify);
 775
 776                 be_ifg_free(chordal_env.ifg);
 777                 pmap_destroy(chordal_env.border_heads);
 778                 bitset_free(chordal_env.ignore_colors);
 779
 780                 if(stat_file) {
 781                         node_stats(&chordal_env, &node_stat);
 782                         be_stat_ev("perms_after_coal", node_stat.n_perms);
 783                         be_stat_ev("copies_after_coal", node_stat.n_copies);
 784                 }
 785
 786                 be_stat_ev_pop();
 787         }
 788
 789         BE_TIMER_PUSH(ra_timer.t_spillslots);
 790
 791         be_coalesce_spillslots(&chordal_env);
 792         dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
 793
 794         BE_TIMER_POP(ra_timer.t_spillslots);
 795
 796         BE_TIMER_PUSH(ra_timer.t_verify);
 797
 798         /* verify spillslots */
 799         if (options.vrfy_option == BE_CH_VRFY_WARN) {
 800                 be_verify_spillslots(main_env->arch_env, irg);
 801         }
 802         else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 803                 assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
 804         }
 805         BE_TIMER_POP(ra_timer.t_verify);
 806
 807         BE_TIMER_PUSH(ra_timer.t_epilog);
 808
 809         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 810
 811         lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 812         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 813
 814         obstack_free(&chordal_env.obst, NULL);
 815         be_free_dominance_frontiers(chordal_env.dom_front);
 816         be_liveness_free(chordal_env.lv);
 817         //free_execfreq(chordal_env.exec_freq);
 818
 819         BE_TIMER_POP(ra_timer.t_epilog);
 820         BE_TIMER_POP(ra_timer.t_other);
 821
 822         be_stat_ev("insns_after", count_insns(irg));
 823         be_stat_ev_pop();
 824
 825         if(stat_file)
 826                 fclose(stat_file);
 827
 828 #ifdef WITH_LIBCORE
 829         return main_opts->timing == BE_TIME_ON ? &ra_timer : NULL;
 830 #endif /* WITH_LIBCORE */
 831         return NULL;
 832 }
 833
 834 const be_ra_t be_ra_chordal_allocator = {
 835 #ifdef WITH_LIBCORE
 836         be_ra_chordal_register_options,
 837 #else
 838         NULL,
 839 #endif
 840         be_ra_chordal_main,
 841 };