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