nsz Git - libfirm/blob - ir/be/bechordal_main.c

   1 /**
   2  * @file   bechordal_main.c
   3  * @date   29.11.2005
   4  * @author Sebastian Hack
   5  * @cvs-id $Id$
   6  *
   7  * Copyright (C) 2005-2006 Universitaet Karlsruhe
   8  * Released under the GPL
   9  *
  10  * Driver for the chordal register allocator.
  11  */
  12 #ifdef HAVE_CONFIG_H
  13 #include "config.h"
  14 #endif
  15
  16 #include <time.h>
  17
  18 #include "obst.h"
  19 #include "pset.h"
  20 #include "list.h"
  21 #include "bitset.h"
  22 #include "iterator.h"
  23 #include "firm_config.h"
  24
  25 #ifdef WITH_LIBCORE
  26 #include <libcore/lc_opts.h>
  27 #include <libcore/lc_opts_enum.h>
  28 #include <libcore/lc_timing.h>
  29 #endif /* WITH_LIBCORE */
  30
  31 #include "ircons_t.h"
  32 #include "irmode_t.h"
  33 #include "irgraph_t.h"
  34 #include "irprintf_t.h"
  35 #include "irgwalk.h"
  36 #include "ircons.h"
  37 #include "irdump.h"
  38 #include "irdom.h"
  39 #include "ircons.h"
  40 #include "irbitset.h"
  41 #include "irnode.h"
  42 #include "ircons.h"
  43 #include "debug.h"
  44 #include "xmalloc.h"
  45 #include "execfreq.h"
  46
  47 #include "bechordal_t.h"
  48 #include "beabi.h"
  49 #include "bejavacoal.h"
  50 #include "beutil.h"
  51 #include "besched.h"
  52 #include "benumb_t.h"
  53 #include "besched_t.h"
  54 #include "belive_t.h"
  55 #include "bearch.h"
  56 #include "beifg_t.h"
  57 #include "beifg_impl.h"
  58 #include "benode_t.h"
  59 #include "bestatevent.h"
  60 #include "bestat.h"
  61
  62 #include "bespillbelady.h"
  63 #include "bespillmorgan.h"
  64 #include "bespillslots.h"
  65 #include "bespilloptions.h"
  66 #include "belower.h"
  67
  68 #ifdef WITH_ILP
  69 #include "bespillremat.h"
  70 #endif /* WITH_ILP */
  71
  72 #include "bejavacoal.h"
  73 #include "becopystat.h"
  74 #include "becopyopt.h"
  75 #include "bessadestr.h"
  76 #include "beverify.h"
  77 #include "bespillcost.h"
  78 #include "benode_t.h"
  79
  80 void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
  81         const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
  82         struct obstack ob;
  83         pmap_entry *pme;
  84         ir_node **nodes, *n1, *n2;
  85         int i, o;
  86         DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
  87
  88         /* Collect all irns */
  89         obstack_init(&ob);
  90         pmap_foreach(chordal_env->border_heads, pme) {
  91                 border_t *curr;
  92                 struct list_head *head = pme->value;
  93                 list_for_each_entry(border_t, curr, head, list)
  94                         if (curr->is_def && curr->is_real)
  95                                 if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
  96                                         obstack_ptr_grow(&ob, curr->irn);
  97         }
  98         obstack_ptr_grow(&ob, NULL);
  99         nodes = (ir_node **) obstack_finish(&ob);
 100
 101         /* Check them */
 102         for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
 103                 const arch_register_t *n1_reg, *n2_reg;
 104
 105                 n1_reg = arch_get_irn_register(arch_env, n1);
 106                 if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
 107                         DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
 108                         assert(0 && "Register constraint does not hold");
 109                 }
 110                 for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
 111                         n2_reg = arch_get_irn_register(arch_env, n2);
 112                         if (values_interfere(chordal_env->lv, n1, n2) && n1_reg == n2_reg) {
 113                                 DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned: %s\n", n1, n2, n1_reg->name));
 114                                 assert(0 && "Interfering values have the same color!");
 115                         }
 116                 }
 117         }
 118         obstack_free(&ob, NULL);
 119 }
 120
 121 int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
 122 {
 123         if(env->ifg)
 124                 return be_ifg_connected(env->ifg, a, b);
 125         else
 126                 return values_interfere(env->lv, a, b);
 127 }
 128
 129
 130 static be_ra_chordal_opts_t options = {
 131         BE_CH_DUMP_NONE,
 132         BE_CH_SPILL_BELADY,
 133         BE_CH_IFG_STD,
 134         BE_CH_LOWER_PERM_SWAP,
 135         BE_CH_VRFY_WARN,
 136 };
 137
 138 /** Enable extreme live range splitting. */
 139 static int be_elr_split = 0;
 140
 141 /** Assumed loop iteration count for execution frequency estimation. */
 142 static int be_loop_weight = 9;
 143
 144 #ifdef WITH_LIBCORE
 145 static be_ra_timer_t ra_timer = {
 146         NULL,
 147         NULL,
 148         NULL,
 149         NULL,
 150         NULL,
 151         NULL,
 152         NULL,
 153         NULL,
 154         NULL,
 155         NULL,
 156         NULL,
 157 };
 158
 159 static const lc_opt_enum_int_items_t spill_items[] = {
 160         { "morgan", BE_CH_SPILL_MORGAN },
 161         { "belady", BE_CH_SPILL_BELADY },
 162 #ifdef WITH_ILP
 163         { "remat",  BE_CH_SPILL_REMAT },
 164 #endif /* WITH_ILP */
 165         { NULL, 0 }
 166 };
 167
 168 static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
 169         { "std",     BE_CH_IFG_STD     },
 170         { "fast",    BE_CH_IFG_FAST    },
 171         { "clique",  BE_CH_IFG_CLIQUE  },
 172         { "pointer", BE_CH_IFG_POINTER },
 173         { "list",    BE_CH_IFG_LIST    },
 174         { "check",   BE_CH_IFG_CHECK   },
 175         { NULL,      0                 }
 176 };
 177
 178 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 179         { "copy", BE_CH_LOWER_PERM_COPY },
 180         { "swap", BE_CH_LOWER_PERM_SWAP },
 181         { NULL, 0 }
 182 };
 183
 184 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 185         { NULL, 0 }
 186 };
 187
 188 static const lc_opt_enum_int_items_t dump_items[] = {
 189         { "spill",      BE_CH_DUMP_SPILL      },
 190         { "live",       BE_CH_DUMP_LIVE       },
 191         { "color",      BE_CH_DUMP_COLOR      },
 192         { "copymin",    BE_CH_DUMP_COPYMIN    },
 193         { "ssadestr",   BE_CH_DUMP_SSADESTR   },
 194         { "tree",       BE_CH_DUMP_TREE_INTV  },
 195         { "constr",     BE_CH_DUMP_CONSTR     },
 196         { "lower",      BE_CH_DUMP_LOWER      },
 197         { "spillslots", BE_CH_DUMP_SPILLSLOTS },
 198         { "appel",      BE_CH_DUMP_APPEL      },
 199         { "all",        BE_CH_DUMP_ALL        },
 200         { NULL, 0 }
 201 };
 202
 203 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 204         { "off",    BE_CH_VRFY_OFF    },
 205         { "warn",   BE_CH_VRFY_WARN   },
 206         { "assert", BE_CH_VRFY_ASSERT },
 207         { NULL, 0 }
 208 };
 209
 210 static lc_opt_enum_int_var_t spill_var = {
 211         &options.spill_method, spill_items
 212 };
 213
 214 static lc_opt_enum_int_var_t ifg_flavor_var = {
 215         &options.ifg_flavor, ifg_flavor_items
 216 };
 217
 218 static lc_opt_enum_int_var_t lower_perm_var = {
 219         &options.lower_perm_opt, lower_perm_items
 220 };
 221
 222 static lc_opt_enum_int_var_t dump_var = {
 223         &options.dump_flags, dump_items
 224 };
 225
 226 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 227         &options.vrfy_option, be_ch_vrfy_items
 228 };
 229
 230 static const lc_opt_table_entry_t be_chordal_options[] = {
 231         LC_OPT_ENT_ENUM_INT ("spill",         "spill method", &spill_var),
 232         LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour", &ifg_flavor_var),
 233         LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options", &lower_perm_var),
 234         LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
 235         LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options", &be_ch_vrfy_var),
 236         LC_OPT_ENT_BOOL     ("elrsplit",      "enable extreme live range splitting", &be_elr_split),
 237         LC_OPT_ENT_INT      ("loop_weight",   "assumed amount of loop iterations for guessing the execution frequency", &be_loop_weight),
 238         { NULL }
 239 };
 240
 241 extern void be_spill_remat_register_options(lc_opt_entry_t *ent);
 242
 243
 244 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 245 {
 246         static int run_once = 0;
 247         lc_opt_entry_t *chordal_grp;
 248
 249         if (! run_once) {
 250                 run_once    = 1;
 251                 chordal_grp = lc_opt_get_grp(grp, "chordal");
 252
 253                 lc_opt_add_table(chordal_grp, be_chordal_options);
 254
 255                 co_register_options(chordal_grp);
 256 #ifdef WITH_JVM
 257                 be_java_coal_register_options(chordal_grp);
 258 #endif
 259 #ifdef WITH_ILP
 260                 be_spill_remat_register_options(chordal_grp);
 261 #endif
 262                 be_spill_register_options(chordal_grp);
 263         }
 264 }
 265 #endif /* WITH_LIBCORE */
 266
 267 static void dump(unsigned mask, ir_graph *irg,
 268                                  const arch_register_class_t *cls,
 269                                  const char *suffix,
 270                                  void (*dump_func)(ir_graph *, const char *))
 271 {
 272         if((options.dump_flags & mask) == mask) {
 273                 if (cls) {
 274                         char buf[256];
 275                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 276                         be_dump(irg, buf, dump_func);
 277                 }
 278                 else
 279                         be_dump(irg, suffix, dump_func);
 280         }
 281 }
 282
 283 static void put_ignore_colors(be_chordal_env_t *chordal_env)
 284 {
 285         int n_colors = chordal_env->cls->n_regs;
 286         int i;
 287
 288         bitset_clear_all(chordal_env->ignore_colors);
 289         be_abi_put_ignore_regs(chordal_env->birg->abi, chordal_env->cls, chordal_env->ignore_colors);
 290         for(i = 0; i < n_colors; ++i)
 291                 if(arch_register_type_is(&chordal_env->cls->regs[i], ignore))
 292                         bitset_set(chordal_env->ignore_colors, i);
 293 }
 294
 295 FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix)
 296 {
 297         char buf[1024];
 298
 299         ir_snprintf(buf, sizeof(buf), "%s%F_%s%s", prefix, env->irg, env->cls->name, suffix);
 300         return fopen(buf, "wt");
 301 }
 302
 303 void check_ifg_implementations(be_chordal_env_t *chordal_env)
 304 {
 305         FILE *f;
 306
 307         f = be_chordal_open(chordal_env, "std", ".log");
 308         chordal_env->ifg = be_ifg_std_new(chordal_env);
 309         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 310         fclose(f);
 311
 312         f = be_chordal_open(chordal_env, "list", ".log");
 313         be_ifg_free(chordal_env->ifg);
 314         chordal_env->ifg = be_ifg_list_new(chordal_env);
 315         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 316         fclose(f);
 317
 318         f = be_chordal_open(chordal_env, "clique", ".log");
 319         be_ifg_free(chordal_env->ifg);
 320         chordal_env->ifg = be_ifg_clique_new(chordal_env);
 321         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 322         fclose(f);
 323
 324         f = be_chordal_open(chordal_env, "pointer", ".log");
 325         be_ifg_free(chordal_env->ifg);
 326         chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 327         be_ifg_check_sorted_to_file(chordal_env->ifg, f);
 328         fclose(f);
 329
 330         chordal_env->ifg = NULL;
 331 };
 332
 333 /**
 334  * Checks for every reload if it's user can perform the load on itself.
 335  */
 336 static void memory_operand_walker(ir_node *irn, void *env) {
 337         be_chordal_env_t *cenv = env;
 338         const arch_env_t *aenv = cenv->birg->main_env->arch_env;
 339         const ir_edge_t  *edge, *ne;
 340         ir_node          *block;
 341         ir_node          *spill;
 342
 343         if (! be_is_Reload(irn))
 344                 return;
 345
 346         /* always use addressmode, it's good for x86 */
 347 #if 0
 348         /* only use memory operands, if the reload is only used by 1 node */
 349         if(get_irn_n_edges(irn) > 1)
 350                 return;
 351 #endif
 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                 assert(src && "outedges broken!");
 361
 362                 if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 363                         DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
 364                         arch_perform_memory_operand(aenv, src, spill, pos);
 365                 }
 366         }
 367
 368         /* kill the Reload */
 369         if (get_irn_n_edges(irn) == 0) {
 370                 sched_remove(irn);
 371                 set_irn_n(irn, 0, new_Bad());
 372                 set_irn_n(irn, 1, new_Bad());
 373         }
 374 }
 375
 376 /**
 377  * Starts a walk for memory operands if supported by the backend.
 378  */
 379 static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 380         irg_walk_graph(chordal_env->irg, NULL, memory_operand_walker, chordal_env);
 381 }
 382
 383 /**
 384  * Sorry for doing stats again...
 385  */
 386 typedef struct _node_stat_t {
 387         unsigned int n_phis;      /**< Phis of the current register class. */
 388         unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
 389         unsigned int n_copies;    /**< Copies */
 390         unsigned int n_perms;     /**< Perms */
 391         unsigned int n_spills;    /**< Spill nodes */
 392         unsigned int n_reloads;   /**< Reloads */
 393 } node_stat_t;
 394
 395 struct node_stat_walker {
 396         node_stat_t *stat;
 397         const be_chordal_env_t *cenv;
 398         bitset_t *mem_phis;
 399 };
 400
 401 static void node_stat_walker(ir_node *irn, void *data)
 402 {
 403         struct node_stat_walker *env = data;
 404         const arch_env_t *aenv       = env->cenv->birg->main_env->arch_env;
 405
 406         if(arch_irn_consider_in_reg_alloc(aenv, env->cenv->cls, irn)) {
 407
 408                 /* if the node is a normal phi */
 409                 if(is_Phi(irn))
 410                         env->stat->n_phis++;
 411
 412                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
 413                         ++env->stat->n_spills;
 414
 415                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
 416                         ++env->stat->n_reloads;
 417
 418                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
 419                         ++env->stat->n_copies;
 420
 421                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
 422                         ++env->stat->n_perms;
 423         }
 424
 425         /* a mem phi is a PhiM with a mem phi operand or a Spill operand */
 426         else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
 427                 int i;
 428
 429                 for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
 430                         ir_node *op = get_irn_n(irn, i);
 431
 432                         if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
 433                                 bitset_add_irn(env->mem_phis, irn);
 434                                 env->stat->n_mem_phis++;
 435                                 break;
 436                         }
 437                 }
 438         }
 439 }
 440
 441 static void node_stats(const be_chordal_env_t *cenv, node_stat_t *stat)
 442 {
 443         struct node_stat_walker env;
 444
 445         memset(stat, 0, sizeof(stat[0]));
 446         env.cenv     = cenv;
 447         env.mem_phis = bitset_irg_malloc(cenv->irg);
 448         env.stat     = stat;
 449         irg_walk_graph(cenv->irg, NULL, node_stat_walker, &env);
 450         bitset_free(env.mem_phis);
 451 }
 452
 453 static void insn_count_walker(ir_node *irn, void *data)
 454 {
 455         int *cnt = data;
 456
 457         switch(get_irn_opcode(irn)) {
 458         case iro_Proj:
 459         case iro_Phi:
 460         case iro_Start:
 461         case iro_End:
 462                 break;
 463         default:
 464                 (*cnt)++;
 465         }
 466 }
 467
 468 static unsigned int count_insns(ir_graph *irg)
 469 {
 470         int cnt = 0;
 471         irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
 472         return cnt;
 473 }
 474
 475 #ifdef WITH_LIBCORE
 476 /**
 477  * Initialize all timers.
 478  */
 479 static void be_init_timer(be_options_t *main_opts)
 480 {
 481         if (main_opts->timing == BE_TIME_ON) {
 482                 ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
 483                 ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
 484                 ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
 485                 ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
 486                 ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
 487                 ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
 488                 ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
 489                 ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
 490                 ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
 491                 ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
 492                 ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 493
 494                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 495                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 496                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 497                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 498                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 499                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 500                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 501                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 502                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 503                 LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 504                 LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 505         }
 506 }
 507
 508 #define BE_TIMER_INIT(main_opts)        be_init_timer(main_opts)
 509
 510 #define BE_TIMER_PUSH(timer)                                                            \
 511         if (main_opts->timing == BE_TIME_ON) {                                              \
 512                 if (! lc_timer_push(timer)) {                                                   \
 513                         if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
 514                                 assert(!"Timer already on stack, cannot be pushed twice.");             \
 515                         else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
 516                                 fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 517                                         lc_timer_get_name(timer));                                          \
 518                 }                                                                               \
 519         }
 520 #define BE_TIMER_POP(timer)                                                                    \
 521         if (main_opts->timing == BE_TIME_ON) {                                                     \
 522                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 523                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                                          \
 524                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 525                 else if (options.vrfy_option == BE_CH_VRFY_WARN && tmp != timer)                       \
 526                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 527                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 528                 timer = tmp;                                                                           \
 529         }
 530 #else
 531
 532 #define BE_TIMER_INIT(main_opts)
 533 #define BE_TIMER_PUSH(timer)
 534 #define BE_TIMER_POP(timer)
 535
 536 #endif /* WITH_LIBCORE */
 537
 538 /**
 539  * Performs chordal register allocation for each register class on given irg.
 540  *
 541  * @param bi  Backend irg object
 542  * @return Structure containing timer for the single phases or NULL if no timing requested.
 543  */
 544 static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 545 {
 546         const be_main_env_t *main_env  = bi->main_env;
 547         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 548         ir_graph            *irg       = bi->irg;
 549         be_options_t        *main_opts = main_env->options;
 550         int                   splitted = 0;
 551
 552         int j, m;
 553         be_chordal_env_t chordal_env;
 554
 555         BE_TIMER_INIT(main_opts);
 556         BE_TIMER_PUSH(ra_timer.t_other);
 557         BE_TIMER_PUSH(ra_timer.t_prolog);
 558
 559         compute_doms(irg);
 560
 561         chordal_env.opts      = &options;
 562         chordal_env.irg       = irg;
 563         chordal_env.birg      = bi;
 564         chordal_env.dom_front = be_compute_dominance_frontiers(irg);
 565         chordal_env.exec_freq = bi->execfreqs;
 566         chordal_env.lv        = be_liveness(irg);
 567         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 568
 569         obstack_init(&chordal_env.obst);
 570
 571         BE_TIMER_POP(ra_timer.t_prolog);
 572
 573         be_stat_ev("insns_before", count_insns(irg));
 574
 575         /* Perform the following for each register class. */
 576         for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 577                 node_stat_t node_stat;
 578                 double spillcosts = 0;
 579
 580                 chordal_env.cls           = arch_isa_get_reg_class(isa, j);
 581                 chordal_env.border_heads  = pmap_create();
 582                 chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 583
 584                 if(be_stat_ev_is_active()) {
 585                         be_stat_tags[STAT_TAG_CLS] = chordal_env.cls->name;
 586                         be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 587
 588                         /* perform some node statistics. */
 589                         node_stats(&chordal_env, &node_stat);
 590                         be_stat_ev("phis_before_spill", node_stat.n_phis);
 591                 }
 592
 593                 /* put all ignore registers into the ignore register set. */
 594                 put_ignore_colors(&chordal_env);
 595
 596                 BE_TIMER_PUSH(ra_timer.t_live);
 597                 be_liveness_recompute(chordal_env.lv);
 598                 BE_TIMER_POP(ra_timer.t_live);
 599                 dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 600
 601                 be_pre_spill_prepare_constr(&chordal_env);
 602                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-constr-pre", dump_ir_block_graph_sched);
 603
 604                 if(be_stat_ev_is_active()) {
 605                         spillcosts = be_estimate_irg_costs(irg, main_env->arch_env, chordal_env.exec_freq);
 606                 }
 607
 608                 BE_TIMER_PUSH(ra_timer.t_spill);
 609
 610                 /* spilling */
 611                 switch(options.spill_method) {
 612                 case BE_CH_SPILL_MORGAN:
 613                         be_spill_morgan(&chordal_env);
 614                         break;
 615                 case BE_CH_SPILL_BELADY:
 616                         be_spill_belady(&chordal_env);
 617                         break;
 618 #ifdef WITH_ILP
 619                 case BE_CH_SPILL_REMAT:
 620                         be_spill_remat(&chordal_env);
 621                         break;
 622 #endif /* WITH_ILP */
 623                 default:
 624                         fprintf(stderr, "no valid spiller selected. falling back to belady\n");
 625                         be_spill_belady(&chordal_env);
 626                 }
 627
 628                 BE_TIMER_POP(ra_timer.t_spill);
 629
 630                 if(be_stat_ev_is_active()) {
 631                         spillcosts = be_estimate_irg_costs(irg, main_env->arch_env, chordal_env.exec_freq) - spillcosts;
 632                         be_stat_ev_l("spillcosts", (long) spillcosts);
 633
 634                         node_stats(&chordal_env, &node_stat);
 635                         be_stat_ev("phis_after_spill", node_stat.n_phis);
 636                         be_stat_ev("mem_phis", node_stat.n_mem_phis);
 637                         be_stat_ev("reloads", node_stat.n_reloads);
 638                         be_stat_ev("spills", node_stat.n_spills);
 639                 }
 640
 641                 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)));
 642
 643                 dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
 644
 645                 check_for_memory_operands(&chordal_env);
 646
 647                 be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
 648
 649                 BE_TIMER_PUSH(ra_timer.t_verify);
 650
 651                 /* verify schedule and register pressure */
 652                 if (options.vrfy_option == BE_CH_VRFY_WARN) {
 653                         be_verify_schedule(irg);
 654                         be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg);
 655                 }
 656                 else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 657                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 658                         assert(be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg)
 659                                 && "Register pressure verification failed");
 660                 }
 661                 BE_TIMER_POP(ra_timer.t_verify);
 662
 663                 if (be_elr_split && ! splitted) {
 664                         extreme_liverange_splitting(&chordal_env);
 665                         splitted = 1;
 666                 }
 667
 668
 669                 /* Color the graph. */
 670                 BE_TIMER_PUSH(ra_timer.t_color);
 671                 be_ra_chordal_color(&chordal_env);
 672                 BE_TIMER_POP(ra_timer.t_color);
 673
 674                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
 675
 676                 /* Create the ifg with the selected flavor */
 677                 BE_TIMER_PUSH(ra_timer.t_ifg);
 678                 switch (options.ifg_flavor) {
 679                         default:
 680                                 fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
 681                         case BE_CH_IFG_STD:
 682                         case BE_CH_IFG_FAST:
 683                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 684                                 break;
 685                         case BE_CH_IFG_CLIQUE:
 686                                 chordal_env.ifg = be_ifg_clique_new(&chordal_env);
 687                                 break;
 688                         case BE_CH_IFG_POINTER:
 689                                 chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
 690                                 break;
 691                         case BE_CH_IFG_LIST:
 692                                 chordal_env.ifg = be_ifg_list_new(&chordal_env);
 693                                 break;
 694                         case BE_CH_IFG_CHECK:
 695                                 check_ifg_implementations(&chordal_env);
 696                                 /* Build the interference graph. */
 697                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 698                                 break;
 699                 }
 700                 BE_TIMER_POP(ra_timer.t_ifg);
 701
 702                 if(be_stat_ev_is_active()) {
 703                         be_ifg_stat_t stat;
 704                         be_ifg_stat(&chordal_env, &stat);
 705                         be_stat_ev("ifg_nodes", stat.n_nodes);
 706                         be_stat_ev("ifg_edges", stat.n_edges);
 707                         be_stat_ev("ifg_comps", stat.n_comps);
 708                 }
 709
 710                 BE_TIMER_PUSH(ra_timer.t_verify);
 711                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 712                         //be_ra_chordal_check(&chordal_env);
 713                 }
 714
 715                 BE_TIMER_POP(ra_timer.t_verify);
 716
 717                 if(be_stat_ev_is_active()) {
 718                         node_stats(&chordal_env, &node_stat);
 719                         be_stat_ev("perms_before_coal", node_stat.n_perms);
 720                         be_stat_ev("copies_before_coal", node_stat.n_copies);
 721                 }
 722
 723                 /* copy minimization */
 724                 BE_TIMER_PUSH(ra_timer.t_copymin);
 725                 co_driver(&chordal_env);
 726                 BE_TIMER_POP(ra_timer.t_copymin);
 727
 728                 dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 729
 730                 BE_TIMER_PUSH(ra_timer.t_verify);
 731
 732                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 733                         //be_ra_chordal_check(&chordal_env);
 734                 }
 735
 736                 BE_TIMER_POP(ra_timer.t_verify);
 737                 BE_TIMER_PUSH(ra_timer.t_ssa);
 738
 739                 /* ssa destruction */
 740                 be_ssa_destruction(&chordal_env);
 741
 742                 BE_TIMER_POP(ra_timer.t_ssa);
 743
 744                 dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
 745
 746                 BE_TIMER_PUSH(ra_timer.t_verify);
 747                 if (options.vrfy_option != BE_CH_VRFY_OFF) {
 748                         be_ssa_destruction_check(&chordal_env);
 749                         //be_ra_chordal_check(&chordal_env);
 750                 }
 751                 BE_TIMER_POP(ra_timer.t_verify);
 752
 753                 be_ifg_free(chordal_env.ifg);
 754                 pmap_destroy(chordal_env.border_heads);
 755                 bitset_free(chordal_env.ignore_colors);
 756
 757                 if(be_stat_ev_is_active()) {
 758                         node_stats(&chordal_env, &node_stat);
 759                         be_stat_ev("perms_after_coal", node_stat.n_perms);
 760                         be_stat_ev("copies_after_coal", node_stat.n_copies);
 761                 }
 762
 763                 be_stat_ev_pop();
 764         }
 765
 766         BE_TIMER_PUSH(ra_timer.t_spillslots);
 767
 768         be_coalesce_spillslots(&chordal_env);
 769         dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
 770
 771         BE_TIMER_POP(ra_timer.t_spillslots);
 772
 773         BE_TIMER_PUSH(ra_timer.t_verify);
 774
 775         /* verify spillslots */
 776         if (options.vrfy_option == BE_CH_VRFY_WARN) {
 777                 be_verify_spillslots(main_env->arch_env, irg);
 778         }
 779         else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 780                 assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
 781         }
 782         BE_TIMER_POP(ra_timer.t_verify);
 783
 784         BE_TIMER_PUSH(ra_timer.t_epilog);
 785
 786         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 787
 788         lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 789         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 790
 791         obstack_free(&chordal_env.obst, NULL);
 792         be_free_dominance_frontiers(chordal_env.dom_front);
 793         be_liveness_free(chordal_env.lv);
 794
 795         BE_TIMER_POP(ra_timer.t_epilog);
 796         BE_TIMER_POP(ra_timer.t_other);
 797
 798         be_stat_ev("insns_after", count_insns(irg));
 799
 800 #ifdef WITH_LIBCORE
 801         return main_opts->timing == BE_TIME_ON ? &ra_timer : NULL;
 802 #endif /* WITH_LIBCORE */
 803         return NULL;
 804 }
 805
 806 const be_ra_t be_ra_chordal_allocator = {
 807 #ifdef WITH_LIBCORE
 808         be_ra_chordal_register_options,
 809 #else
 810         NULL,
 811 #endif
 812         be_ra_chordal_main,
 813 };