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", &coalesce_spill_slots),
 237         LC_OPT_ENT_ENUM_INT ("spill",         "spill method", &spill_var),
 238         LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour", &ifg_flavor_var),
 239         LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options", &lower_perm_var),
 240         LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
 241         LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options", &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         /* always use addressmode, it's good for x86 */
 350 #if 0
 351         /* only use memory operands, if the reload is only used by 1 node */
 352         if(get_irn_n_edges(irn) > 1)
 353                 return;
 354 #endif
 355
 356         spill = be_get_Reload_mem(irn);
 357         block = get_nodes_block(irn);
 358
 359         foreach_out_edge_safe(irn, edge, ne) {
 360                 ir_node *src = get_edge_src_irn(edge);
 361                 int     pos  = get_edge_src_pos(edge);
 362
 363                 if (! src)
 364                         continue;
 365
 366                 if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 367                         DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
 368                         arch_perform_memory_operand(aenv, src, spill, pos);
 369                 }
 370         }
 371
 372         /* kill the Reload */
 373         if (get_irn_n_edges(irn) == 0) {
 374                 sched_remove(irn);
 375                 set_irn_n(irn, 0, new_Bad());
 376                 set_irn_n(irn, 1, new_Bad());
 377         }
 378 }
 379
 380 /**
 381  * Starts a walk for memory operands if supported by the backend.
 382  */
 383 static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 384         irg_walk_graph(chordal_env->irg, NULL, memory_operand_walker, chordal_env);
 385 }
 386
 387 /**
 388  * Sorry for doing stats again...
 389  */
 390 typedef struct _node_stat_t {
 391         unsigned int n_phis;      /**< Phis of the current register class. */
 392         unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
 393         unsigned int n_copies;    /**< Copies */
 394         unsigned int n_perms;     /**< Perms */
 395         unsigned int n_spills;    /**< Spill nodes */
 396         unsigned int n_reloads;   /**< Reloads */
 397 } node_stat_t;
 398
 399 struct node_stat_walker {
 400         node_stat_t *stat;
 401         const be_chordal_env_t *cenv;
 402         bitset_t *mem_phis;
 403 };
 404
 405 static void node_stat_walker(ir_node *irn, void *data)
 406 {
 407         struct node_stat_walker *env = data;
 408         const arch_env_t *aenv       = env->cenv->birg->main_env->arch_env;
 409
 410         if(arch_irn_consider_in_reg_alloc(aenv, env->cenv->cls, irn)) {
 411
 412                 /* if the node is a normal phi */
 413                 if(is_Phi(irn))
 414                         env->stat->n_phis++;
 415
 416                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
 417                         ++env->stat->n_spills;
 418
 419                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
 420                         ++env->stat->n_reloads;
 421
 422                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
 423                         ++env->stat->n_copies;
 424
 425                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
 426                         ++env->stat->n_perms;
 427         }
 428
 429         /* a mem phi is a PhiM with a mem phi operand or a Spill operand */
 430         else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
 431                 int i;
 432
 433                 for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
 434                         ir_node *op = get_irn_n(irn, i);
 435
 436                         if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
 437                                 bitset_add_irn(env->mem_phis, irn);
 438                                 env->stat->n_mem_phis++;
 439                                 break;
 440                         }
 441                 }
 442         }
 443 }
 444
 445 static void node_stats(const be_chordal_env_t *cenv, node_stat_t *stat)
 446 {
 447         struct node_stat_walker env;
 448
 449         memset(stat, 0, sizeof(stat[0]));
 450         env.cenv     = cenv;
 451         env.mem_phis = bitset_irg_malloc(cenv->irg);
 452         env.stat     = stat;
 453         irg_walk_graph(cenv->irg, NULL, node_stat_walker, &env);
 454         bitset_free(env.mem_phis);
 455 }
 456
 457 static void insn_count_walker(ir_node *irn, void *data)
 458 {
 459         int *cnt = data;
 460
 461         switch(get_irn_opcode(irn)) {
 462         case iro_Proj:
 463         case iro_Phi:
 464         case iro_Start:
 465         case iro_End:
 466                 break;
 467         default:
 468                 (*cnt)++;
 469         }
 470 }
 471
 472 static unsigned int count_insns(ir_graph *irg)
 473 {
 474         int cnt = 0;
 475         irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
 476         return cnt;
 477 }
 478
 479 #ifdef WITH_LIBCORE
 480 /**
 481  * Initialize all timers.
 482  */
 483 static void be_init_timer(be_options_t *main_opts)
 484 {
 485         if (main_opts->timing == BE_TIME_ON) {
 486                 ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
 487                 ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
 488                 ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
 489                 ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
 490                 ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
 491                 ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
 492                 ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
 493                 ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
 494                 ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
 495                 ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
 496                 ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 497
 498                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 499                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 500                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 501                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 502                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 503                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 504                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 505                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 506                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 507                 LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 508                 LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 509         }
 510 }
 511
 512 #define BE_TIMER_INIT(main_opts)        be_init_timer(main_opts)
 513
 514 #define BE_TIMER_PUSH(timer)                                                            \
 515         if (main_opts->timing == BE_TIME_ON) {                                              \
 516                 if (! lc_timer_push(timer)) {                                                   \
 517                         if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
 518                                 assert(!"Timer already on stack, cannot be pushed twice.");             \
 519                         else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
 520                                 fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 521                                         lc_timer_get_name(timer));                                          \
 522                 }                                                                               \
 523         }
 524 #define BE_TIMER_POP(timer)                                                                    \
 525         if (main_opts->timing == BE_TIME_ON) {                                                     \
 526                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 527                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                                          \
 528                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 529                 else if (options.vrfy_option == BE_CH_VRFY_WARN && tmp != timer)                       \
 530                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 531                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 532                 timer = tmp;                                                                           \
 533         }
 534 #else
 535
 536 #define BE_TIMER_INIT(main_opts)
 537 #define BE_TIMER_PUSH(timer)
 538 #define BE_TIMER_POP(timer)
 539
 540 #endif /* WITH_LIBCORE */
 541
 542 enum {
 543         STAT_TAG_FILE = 0,
 544         STAT_TAG_TIME = 1,
 545         STAT_TAG_IRG  = 2,
 546         STAT_TAG_CLS  = 3,
 547         STAT_TAG_LAST
 548 };
 549
 550 /**
 551  * Performs chordal register allocation for each register class on given irg.
 552  *
 553  * @param bi  Backend irg object
 554  * @return Structure containing timer for the single phases or NULL if no timing requested.
 555  */
 556 static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 557 {
 558         const be_main_env_t *main_env  = bi->main_env;
 559         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 560         ir_graph            *irg       = bi->irg;
 561         be_options_t        *main_opts = main_env->options;
 562         int                   splitted = 0;
 563         FILE                *stat_file = NULL;
 564
 565         char time_str[32];
 566         char irg_name[128];
 567         int j, m, line;
 568         be_chordal_env_t chordal_env;
 569         const char *stat_tags[STAT_TAG_LAST];
 570
 571         /* if we want to do some statistics, push the environment. */
 572         if(strlen(stat_file_name) > 0 && (stat_file = fopen(stat_file_name, "at")) != NULL) {
 573
 574                 /* initialize the statistics tags */
 575                 ir_snprintf(time_str, sizeof(time_str),"%u", time(NULL));
 576                 ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
 577
 578                 stat_tags[STAT_TAG_FILE] = be_retrieve_dbg_info(get_entity_dbg_info(get_irg_entity(irg)), &line);
 579                 stat_tags[STAT_TAG_TIME] = time_str;
 580                 stat_tags[STAT_TAG_IRG]  = irg_name;
 581                 stat_tags[STAT_TAG_CLS]  = "<all>";
 582
 583                 be_stat_ev_push(stat_tags, STAT_TAG_LAST, stat_file);
 584         }
 585
 586         BE_TIMER_INIT(main_opts);
 587         BE_TIMER_PUSH(ra_timer.t_other);
 588         BE_TIMER_PUSH(ra_timer.t_prolog);
 589
 590         compute_doms(irg);
 591
 592         chordal_env.opts      = &options;
 593         chordal_env.irg       = irg;
 594         chordal_env.birg      = bi;
 595         chordal_env.dom_front = be_compute_dominance_frontiers(irg);
 596         chordal_env.exec_freq = bi->execfreqs;
 597                 /*compute_execfreq(irg, be_loop_weight);*/
 598         chordal_env.lv        = be_liveness(irg);
 599         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 600
 601         obstack_init(&chordal_env.obst);
 602
 603         BE_TIMER_POP(ra_timer.t_prolog);
 604
 605         be_stat_ev("insns_before", count_insns(irg));
 606
 607         /* Perform the following for each register class. */
 608         for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 609                 node_stat_t node_stat;
 610
 611                 chordal_env.cls           = arch_isa_get_reg_class(isa, j);
 612                 chordal_env.border_heads  = pmap_create();
 613                 chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 614
 615                 stat_tags[STAT_TAG_CLS] = chordal_env.cls->name;
 616
 617                 if(stat_file) {
 618                         be_stat_ev_push(stat_tags, STAT_TAG_LAST, stat_file);
 619
 620                         /* perform some node statistics. */
 621                         node_stats(&chordal_env, &node_stat);
 622                         be_stat_ev("phis_before_spill", node_stat.n_phis);
 623                 }
 624
 625                 /* put all ignore registers into the ignore register set. */
 626                 put_ignore_colors(&chordal_env);
 627
 628                 BE_TIMER_PUSH(ra_timer.t_live);
 629                 be_liveness_recompute(chordal_env.lv);
 630                 BE_TIMER_POP(ra_timer.t_live);
 631                 dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 632
 633                 be_pre_spill_prepare_constr(&chordal_env);
 634                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-constr-pre", dump_ir_block_graph_sched);
 635
 636                 BE_TIMER_PUSH(ra_timer.t_spill);
 637
 638                 /* spilling */
 639                 switch(options.spill_method) {
 640                 case BE_CH_SPILL_MORGAN:
 641                         be_spill_morgan(&chordal_env);
 642                         break;
 643                 case BE_CH_SPILL_BELADY:
 644                         be_spill_belady(&chordal_env);
 645                         break;
 646 #ifdef WITH_ILP
 647                 case BE_CH_SPILL_REMAT:
 648                         be_spill_remat(&chordal_env);
 649                         break;
 650 #endif /* WITH_ILP */
 651                 default:
 652                         fprintf(stderr, "no valid spiller selected. falling back to belady\n");
 653                         be_spill_belady(&chordal_env);
 654                 }
 655
 656                 BE_TIMER_POP(ra_timer.t_spill);
 657
 658                 if(stat_file) {
 659                         node_stats(&chordal_env, &node_stat);
 660                         be_stat_ev("phis_after_spill", node_stat.n_phis);
 661                         be_stat_ev("mem_phis", node_stat.n_mem_phis);
 662                         be_stat_ev("reloads", node_stat.n_reloads);
 663                         be_stat_ev("spills", node_stat.n_spills);
 664                 }
 665
 666                 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)));
 667
 668                 dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
 669
 670                 check_for_memory_operands(&chordal_env);
 671
 672                 be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
 673
 674                 BE_TIMER_PUSH(ra_timer.t_verify);
 675
 676                 /* verify schedule and register pressure */
 677                 if (options.vrfy_option == BE_CH_VRFY_WARN) {
 678                         be_verify_schedule(irg);
 679                         be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg);
 680                 }
 681                 else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 682                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 683                         assert(be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg)
 684                                 && "Register pressure verification failed");
 685                 }
 686                 BE_TIMER_POP(ra_timer.t_verify);
 687
 688                 if (be_elr_split && ! splitted) {
 689                         extreme_liverange_splitting(&chordal_env);
 690                         splitted = 1;
 691                 }
 692
 693
 694                 /* Color the graph. */
 695                 BE_TIMER_PUSH(ra_timer.t_color);
 696                 be_ra_chordal_color(&chordal_env);
 697                 BE_TIMER_POP(ra_timer.t_color);
 698
 699                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
 700
 701                 /* Create the ifg with the selected flavor */
 702                 BE_TIMER_PUSH(ra_timer.t_ifg);
 703                 switch (options.ifg_flavor) {
 704                         default:
 705                                 fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
 706                         case BE_CH_IFG_STD:
 707                         case BE_CH_IFG_FAST:
 708                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 709                                 break;
 710                         case BE_CH_IFG_CLIQUE:
 711                                 chordal_env.ifg = be_ifg_clique_new(&chordal_env);
 712                                 break;
 713                         case BE_CH_IFG_POINTER:
 714                                 chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
 715                                 break;
 716                         case BE_CH_IFG_LIST:
 717                                 chordal_env.ifg = be_ifg_list_new(&chordal_env);
 718                                 break;
 719                         case BE_CH_IFG_CHECK:
 720                                 check_ifg_implementations(&chordal_env);
 721                                 /* Build the interference graph. */
 722                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 723                                 break;
 724                 }
 725                 BE_TIMER_POP(ra_timer.t_ifg);
 726
 727                 if(stat_file) {
 728                         be_ifg_stat_t stat;
 729                         be_ifg_stat(&chordal_env, &stat);
 730                         be_stat_ev("ifg_nodes", stat.n_nodes);
 731                         be_stat_ev("ifg_edges", stat.n_edges);
 732                         be_stat_ev("ifg_comps", stat.n_comps);
 733                 }
 734
 735                 BE_TIMER_PUSH(ra_timer.t_verify);
 736                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 737                         //be_ra_chordal_check(&chordal_env);
 738                 }
 739
 740                 BE_TIMER_POP(ra_timer.t_verify);
 741
 742                 if(stat_file) {
 743                         node_stats(&chordal_env, &node_stat);
 744                         be_stat_ev("perms_before_coal", node_stat.n_perms);
 745                         be_stat_ev("copies_before_coal", node_stat.n_copies);
 746                 }
 747
 748                 /* copy minimization */
 749                 BE_TIMER_PUSH(ra_timer.t_copymin);
 750                 co_driver(&chordal_env);
 751                 BE_TIMER_POP(ra_timer.t_copymin);
 752
 753                 dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 754
 755                 BE_TIMER_PUSH(ra_timer.t_verify);
 756
 757                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 758                         //be_ra_chordal_check(&chordal_env);
 759                 }
 760
 761                 BE_TIMER_POP(ra_timer.t_verify);
 762                 BE_TIMER_PUSH(ra_timer.t_ssa);
 763
 764                 /* ssa destruction */
 765                 be_ssa_destruction(&chordal_env);
 766
 767                 BE_TIMER_POP(ra_timer.t_ssa);
 768
 769                 dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
 770
 771                 BE_TIMER_PUSH(ra_timer.t_verify);
 772                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 773                         be_ssa_destruction_check(&chordal_env);
 774                         //be_ra_chordal_check(&chordal_env);
 775                 }
 776                 BE_TIMER_POP(ra_timer.t_verify);
 777
 778                 be_ifg_free(chordal_env.ifg);
 779                 pmap_destroy(chordal_env.border_heads);
 780                 bitset_free(chordal_env.ignore_colors);
 781
 782                 if(stat_file) {
 783                         node_stats(&chordal_env, &node_stat);
 784                         be_stat_ev("perms_after_coal", node_stat.n_perms);
 785                         be_stat_ev("copies_after_coal", node_stat.n_copies);
 786                 }
 787
 788                 be_stat_ev_pop();
 789         }
 790
 791         BE_TIMER_PUSH(ra_timer.t_spillslots);
 792
 793         be_coalesce_spillslots(&chordal_env, coalesce_spill_slots);
 794         dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
 795
 796         BE_TIMER_POP(ra_timer.t_spillslots);
 797
 798         BE_TIMER_PUSH(ra_timer.t_verify);
 799
 800         /* verify spillslots */
 801         if (options.vrfy_option == BE_CH_VRFY_WARN) {
 802                 be_verify_spillslots(main_env->arch_env, irg);
 803         }
 804         else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 805                 assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
 806         }
 807         BE_TIMER_POP(ra_timer.t_verify);
 808
 809         BE_TIMER_PUSH(ra_timer.t_epilog);
 810
 811         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 812
 813         lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 814         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 815
 816         obstack_free(&chordal_env.obst, NULL);
 817         be_free_dominance_frontiers(chordal_env.dom_front);
 818         be_liveness_free(chordal_env.lv);
 819         //free_execfreq(chordal_env.exec_freq);
 820
 821         BE_TIMER_POP(ra_timer.t_epilog);
 822         BE_TIMER_POP(ra_timer.t_other);
 823
 824         be_stat_ev("insns_after", count_insns(irg));
 825         be_stat_ev_pop();
 826
 827         if(stat_file)
 828                 fclose(stat_file);
 829
 830 #ifdef WITH_LIBCORE
 831         return main_opts->timing == BE_TIME_ON ? &ra_timer : NULL;
 832 #endif /* WITH_LIBCORE */
 833         return NULL;
 834 }
 835
 836 const be_ra_t be_ra_chordal_allocator = {
 837 #ifdef WITH_LIBCORE
 838         be_ra_chordal_register_options,
 839 #else
 840         NULL,
 841 #endif
 842         be_ra_chordal_main,
 843 };