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  *
   6  * Copyright (C) 2005 Universitaet Karlsruhe
   7  * Released under the GPL
   8  *
   9  * Driver for the chordal register allocator.
  10  */
  11 #ifdef HAVE_CONFIG_H
  12 #include "config.h"
  13 #endif
  14
  15 #include "obst.h"
  16 #include "pset.h"
  17 #include "list.h"
  18 #include "bitset.h"
  19 #include "iterator.h"
  20 #include "firm_config.h"
  21
  22 #ifdef WITH_LIBCORE
  23 #include <libcore/lc_opts.h>
  24 #include <libcore/lc_opts_enum.h>
  25 #include <libcore/lc_timing.h>
  26 #endif /* WITH_LIBCORE */
  27
  28 #include "irmode_t.h"
  29 #include "irgraph_t.h"
  30 #include "irprintf_t.h"
  31 #include "irgwalk.h"
  32 #include "irdump.h"
  33 #include "irdom.h"
  34 #include "irbitset.h"
  35 #include "debug.h"
  36 #include "xmalloc.h"
  37
  38 #include "bechordal_t.h"
  39 #include "beabi.h"
  40 #include "beutil.h"
  41 #include "besched.h"
  42 #include "benumb_t.h"
  43 #include "besched_t.h"
  44 #include "belive_t.h"
  45 #include "bearch.h"
  46 #include "beifg_t.h"
  47 #include "beifg_impl.h"
  48
  49 #include "bespillbelady.h"
  50 #include "bespillmorgan.h"
  51 #include "belower.h"
  52
  53 #ifdef WITH_ILP
  54 #include "bespillilp.h"
  55 #include "bespillremat.h"
  56 #include "bespillappel.h"
  57 #endif /* WITH_ILP */
  58
  59 #include "becopystat.h"
  60 #include "becopyopt.h"
  61 #include "bessadestr.h"
  62 #include "beverify.h"
  63
  64
  65 void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
  66         const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
  67         struct obstack ob;
  68         pmap_entry *pme;
  69         ir_node **nodes, *n1, *n2;
  70         int i, o;
  71         DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
  72
  73         /* Collect all irns */
  74         obstack_init(&ob);
  75         pmap_foreach(chordal_env->border_heads, pme) {
  76                 border_t *curr;
  77                 struct list_head *head = pme->value;
  78                 list_for_each_entry(border_t, curr, head, list)
  79                         if (curr->is_def && curr->is_real)
  80                                 if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
  81                                         obstack_ptr_grow(&ob, curr->irn);
  82         }
  83         obstack_ptr_grow(&ob, NULL);
  84         nodes = (ir_node **) obstack_finish(&ob);
  85
  86         /* Check them */
  87         for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
  88                 const arch_register_t *n1_reg, *n2_reg;
  89
  90                 n1_reg = arch_get_irn_register(arch_env, n1);
  91                 if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
  92                         DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
  93                         assert(0 && "Register constraint does not hold");
  94                 }
  95                 for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
  96                         n2_reg = arch_get_irn_register(arch_env, n2);
  97                         if (values_interfere(n1, n2) && n1_reg == n2_reg) {
  98                                 DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned\n", n1, n2));
  99                                 assert(0 && "Interfering values have the same color!");
 100                         }
 101                 }
 102         }
 103         obstack_free(&ob, NULL);
 104 }
 105
 106 int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
 107 {
 108         if(env->ifg)
 109                 return be_ifg_connected(env->ifg, a, b);
 110         else
 111                 return values_interfere(a, b);
 112 }
 113
 114
 115 static be_ra_chordal_opts_t options = {
 116         BE_CH_DUMP_NONE,
 117         BE_CH_SPILL_BELADY,
 118         BE_CH_COPYMIN_HEUR1,
 119         BE_CH_IFG_STD,
 120         BE_CH_LOWER_PERM_SWAP,
 121         BE_CH_VRFY_WARN,
 122 };
 123
 124 #ifdef WITH_LIBCORE
 125 static const lc_opt_enum_int_items_t spill_items[] = {
 126         { "morgan", BE_CH_SPILL_MORGAN },
 127         { "belady", BE_CH_SPILL_BELADY },
 128 #ifdef WITH_ILP
 129         { "ilp",    BE_CH_SPILL_ILP    },
 130         { "remat",  BE_CH_SPILL_REMAT  },
 131         { "appel",  BE_CH_SPILL_APPEL  },
 132 #endif /* WITH_ILP */
 133         { NULL, 0 }
 134 };
 135
 136 static const lc_opt_enum_int_items_t copymin_items[] = {
 137         { "none",  BE_CH_COPYMIN_NONE      },
 138         { "heur1", BE_CH_COPYMIN_HEUR1     },
 139         { "heur2", BE_CH_COPYMIN_HEUR2     },
 140         { "stat",  BE_CH_COPYMIN_STAT      },
 141         { "park",  BE_CH_COPYMIN_PARK_MOON },
 142 #ifdef WITH_ILP
 143         { "ilp1",  BE_CH_COPYMIN_ILP1 },
 144         { "ilp2",  BE_CH_COPYMIN_ILP2 },
 145 #endif /* WITH_ILP */
 146         { NULL, 0 }
 147 };
 148
 149 static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
 150         { "std",     BE_CH_IFG_STD     },
 151         { "fast",    BE_CH_IFG_FAST    },
 152         { "clique",  BE_CH_IFG_CLIQUE  },
 153         { "pointer", BE_CH_IFG_POINTER },
 154         { "list",    BE_CH_IFG_LIST    },
 155         { "check",   BE_CH_IFG_CHECK   },
 156         { NULL,      0                 }
 157 };
 158
 159 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 160         { "copy", BE_CH_LOWER_PERM_COPY },
 161         { "swap", BE_CH_LOWER_PERM_SWAP },
 162         { NULL, 0 }
 163 };
 164
 165 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 166         { NULL, 0 }
 167 };
 168
 169 static const lc_opt_enum_int_items_t dump_items[] = {
 170         { "spill",    BE_CH_DUMP_SPILL     },
 171         { "live",     BE_CH_DUMP_LIVE      },
 172         { "color",    BE_CH_DUMP_COLOR     },
 173         { "copymin",  BE_CH_DUMP_COPYMIN   },
 174         { "ssadestr", BE_CH_DUMP_SSADESTR  },
 175         { "tree",     BE_CH_DUMP_TREE_INTV },
 176         { "constr",   BE_CH_DUMP_CONSTR    },
 177         { "lower",    BE_CH_DUMP_LOWER     },
 178         { "all",      BE_CH_DUMP_ALL       },
 179         { NULL, 0 }
 180 };
 181
 182 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 183         { "off",    BE_CH_VRFY_OFF    },
 184         { "warn",   BE_CH_VRFY_WARN   },
 185         { "assert", BE_CH_VRFY_ASSERT },
 186         { NULL, 0 }
 187 };
 188
 189 static lc_opt_enum_int_var_t spill_var = {
 190         &options.spill_method, spill_items
 191 };
 192
 193 static lc_opt_enum_int_var_t copymin_var = {
 194         &options.copymin_method, copymin_items
 195 };
 196
 197 static lc_opt_enum_int_var_t ifg_flavor_var = {
 198         &options.ifg_flavor, ifg_flavor_items
 199 };
 200
 201 static lc_opt_enum_int_var_t lower_perm_var = {
 202         &options.lower_perm_opt, lower_perm_items
 203 };
 204
 205 static lc_opt_enum_int_var_t dump_var = {
 206         &options.dump_flags, dump_items
 207 };
 208
 209 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 210         &options.vrfy_option, be_ch_vrfy_items
 211 };
 212
 213 static const lc_opt_table_entry_t be_chordal_options[] = {
 214         LC_OPT_ENT_ENUM_MASK("spill",   "spill method (belady, ilp, remat or appel)", &spill_var),
 215         LC_OPT_ENT_ENUM_PTR ("copymin", "copymin method (none, heur1, heur2, ilp1, ilp2 or stat)", &copymin_var),
 216         LC_OPT_ENT_ENUM_PTR ("ifg",     "interference graph flavour (std, fast, clique, pointer, list, check)", &ifg_flavor_var),
 217         LC_OPT_ENT_ENUM_PTR ("perm",    "perm lowering options (copy or swap)", &lower_perm_var),
 218         LC_OPT_ENT_ENUM_MASK("dump",    "select dump phases", &dump_var),
 219         LC_OPT_ENT_ENUM_PTR ("vrfy",    "verify options (off, warn, assert)", &be_ch_vrfy_var),
 220         { NULL }
 221 };
 222
 223 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 224 {
 225         static int run_once = 0;
 226         lc_opt_entry_t *chordal_grp;
 227
 228         if (! run_once) {
 229                 run_once    = 1;
 230                 chordal_grp = lc_opt_get_grp(grp, "chordal");
 231
 232                 lc_opt_add_table(chordal_grp, be_chordal_options);
 233         }
 234
 235         co_register_options(chordal_grp);
 236 }
 237 #endif /* WITH_LIBCORE */
 238
 239 static void dump(unsigned mask, ir_graph *irg,
 240                                  const arch_register_class_t *cls,
 241                                  const char *suffix,
 242                                  void (*dump_func)(ir_graph *, const char *))
 243 {
 244         if((options.dump_flags & mask) == mask) {
 245                 if (cls) {
 246                         char buf[256];
 247                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 248                         be_dump(irg, buf, dump_func);
 249                 }
 250                 else
 251                         be_dump(irg, suffix, dump_func);
 252         }
 253 }
 254
 255 static void put_ignore_colors(be_chordal_env_t *chordal_env)
 256 {
 257         int n_colors = chordal_env->cls->n_regs;
 258         int i;
 259
 260         bitset_clear_all(chordal_env->ignore_colors);
 261         be_abi_put_ignore_regs(chordal_env->birg->abi, chordal_env->cls, chordal_env->ignore_colors);
 262         for(i = 0; i < n_colors; ++i)
 263                 if(arch_register_type_is(&chordal_env->cls->regs[i], ignore))
 264                         bitset_set(chordal_env->ignore_colors, i);
 265 }
 266
 267 FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix)
 268 {
 269         char buf[1024];
 270
 271         ir_snprintf(buf, sizeof(buf), "%s%F_%s.%s", prefix, env->irg, env->cls->name, suffix);
 272         return fopen(buf, "wt");
 273 }
 274
 275 void check_ifg_implementations(be_chordal_env_t *chordal_env)
 276 {
 277         FILE *f;
 278
 279         f = be_chordal_open(chordal_env, "std", "log");
 280         chordal_env->ifg = be_ifg_std_new(chordal_env);
 281         be_ifg_check_sorted(chordal_env->ifg, f);
 282         fclose(f);
 283
 284         f = be_chordal_open(chordal_env, "list", "log");
 285         chordal_env->ifg = be_ifg_list_new(chordal_env);
 286         be_ifg_check_sorted(chordal_env->ifg, f);
 287         fclose(f);
 288
 289         f = be_chordal_open(chordal_env, "clique", "log");
 290         chordal_env->ifg = be_ifg_clique_new(chordal_env);
 291         be_ifg_check_sorted(chordal_env->ifg, f);
 292         fclose(f);
 293
 294         f = be_chordal_open(chordal_env, "pointer", "log");
 295         chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 296         be_ifg_check_sorted(chordal_env->ifg, f);
 297         fclose(f);
 298
 299         chordal_env->ifg = NULL;
 300 };
 301
 302 static void be_ra_chordal_main(const be_irg_t *bi)
 303 {
 304         const be_main_env_t *main_env = bi->main_env;
 305         const arch_isa_t    *isa      = arch_env_get_isa(main_env->arch_env);
 306         ir_graph            *irg      = bi->irg;
 307         copy_opt_t          *co;
 308
 309         int j, m;
 310         be_chordal_env_t chordal_env;
 311
 312         compute_doms(irg);
 313
 314         chordal_env.opts          = &options;
 315         chordal_env.irg           = irg;
 316         chordal_env.birg          = bi;
 317         chordal_env.dom_front     = be_compute_dominance_frontiers(irg);
 318         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 319
 320         obstack_init(&chordal_env.obst);
 321
 322         /* Perform the following for each register class. */
 323         for(j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 324                 chordal_env.cls           = arch_isa_get_reg_class(isa, j);
 325                 chordal_env.border_heads  = pmap_create();
 326                 chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 327
 328                 /* put all ignore registers into the ignore register set. */
 329                 put_ignore_colors(&chordal_env);
 330
 331                 be_liveness(irg);
 332                 dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 333
 334                 /* spilling */
 335                 switch(options.spill_method) {
 336                 case BE_CH_SPILL_MORGAN:
 337                         be_spill_morgan(&chordal_env);
 338                         break;
 339                 case BE_CH_SPILL_BELADY:
 340                         be_spill_belady(&chordal_env);
 341                         break;
 342 #ifdef WITH_ILP
 343                 case BE_CH_SPILL_ILP:
 344                         be_spill_ilp(&chordal_env);
 345                         break;
 346                 case BE_CH_SPILL_REMAT:
 347                         be_spill_remat(&chordal_env);
 348                         break;
 349                 case BE_CH_SPILL_APPEL:
 350                         be_spill_appel(&chordal_env);
 351                         break;
 352 #endif /* WITH_ILP */
 353                 default:
 354                         fprintf(stderr, "no valid spiller selected. falling back to belady\n");
 355                         be_spill_belady(&chordal_env);
 356                 }
 357                 dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
 358                 be_abi_fix_stack_nodes(bi->abi);
 359
 360                 /* verify schedule and register pressure */
 361                 if (options.vrfy_option == BE_CH_VRFY_WARN) {
 362                         be_verify_schedule(irg);
 363                         be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg);
 364                 }
 365                 else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 366                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 367                         assert(be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg)
 368                                 && "Register pressure verification failed");
 369                 }
 370
 371                 /* Color the graph. */
 372                 be_liveness(irg);
 373                 be_ra_chordal_color(&chordal_env);
 374                 dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
 375
 376                 //be_ifg_check_performance(&chordal_env);
 377
 378                 /* Create the ifg with the selected flavor */
 379                 switch (options.ifg_flavor) {
 380                         default:
 381                                 fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
 382                         case BE_CH_IFG_STD:
 383                         case BE_CH_IFG_FAST:
 384                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 385                                 break;
 386                         case BE_CH_IFG_CLIQUE:
 387                                 chordal_env.ifg = be_ifg_clique_new(&chordal_env);
 388                                 break;
 389                         case BE_CH_IFG_POINTER:
 390                                 chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
 391                                 break;
 392                         case BE_CH_IFG_LIST:
 393                                 chordal_env.ifg = be_ifg_list_new(&chordal_env);
 394                                 break;
 395                         case BE_CH_IFG_CHECK:
 396                                 check_ifg_implementations(&chordal_env);
 397                                 /* Build the interference graph. */
 398                                 chordal_env.ifg = be_ifg_std_new(&chordal_env);
 399                                 //be_ifg_check(chordal_env.ifg);
 400                                 //be_ifg_check_sorted(chordal_env.ifg);
 401                                 break;
 402                 }
 403
 404                 /* copy minimization */
 405                 co = NULL;
 406                 if (options.copymin_method != BE_CH_COPYMIN_NONE && options.copymin_method != BE_CH_COPYMIN_STAT) {
 407                         co = new_copy_opt(&chordal_env, co_get_costs_loop_depth);
 408                         co_build_ou_structure(co);
 409                         co_build_graph_structure(co);
 410                 }
 411
 412                 switch(options.copymin_method) {
 413                         case BE_CH_COPYMIN_HEUR1:
 414                                 co_solve_heuristic(co);
 415                                 break;
 416                         case BE_CH_COPYMIN_HEUR2:
 417                                 co_solve_heuristic_new(co);
 418                                 break;
 419                         case BE_CH_COPYMIN_PARK_MOON:
 420                                 co_solve_park_moon(co);
 421                                 break;
 422                         case BE_CH_COPYMIN_STAT:
 423                                 co_compare_solvers(&chordal_env);
 424                                 break;
 425 #ifdef WITH_ILP
 426                         case BE_CH_COPYMIN_ILP1:
 427                                 printf("FIXME: %s:%d ILP1 not yet implemented!\n", __FILE__, __LINE__);
 428                                 co_solve_ilp1(co, 60.0);
 429                                 break;
 430                         case BE_CH_COPYMIN_ILP2:
 431                                 co_solve_ilp2(co, 60.0);
 432                                 break;
 433 #endif /* WITH_ILP */
 434                         case BE_CH_COPYMIN_NONE:
 435                         default:
 436                                 break;
 437                 }
 438
 439                 if (co) {
 440                         co_free_graph_structure(co);
 441                         co_free_ou_structure(co);
 442                         free_copy_opt(co);
 443                 }
 444
 445                 dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 446                 be_ra_chordal_check(&chordal_env);
 447
 448                 /* ssa destruction */
 449                 be_ssa_destruction(&chordal_env);
 450                 dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
 451                 be_ssa_destruction_check(&chordal_env);
 452                 be_ra_chordal_check(&chordal_env);
 453
 454                 copystat_dump(irg);
 455
 456                 be_ifg_free(chordal_env.ifg);
 457                 pmap_destroy(chordal_env.border_heads);
 458                 bitset_free(chordal_env.ignore_colors);
 459         }
 460
 461         be_compute_spill_offsets(&chordal_env);
 462
 463         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 464
 465         lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 466         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 467
 468         obstack_free(&chordal_env.obst, NULL);
 469         be_free_dominance_frontiers(chordal_env.dom_front);
 470 }
 471
 472 const be_ra_t be_ra_chordal_allocator = {
 473 #ifdef WITH_LIBCORE
 474         be_ra_chordal_register_options,
 475 #endif
 476         be_ra_chordal_main
 477 };