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