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

   1 /*
   2  * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief       Driver for the chordal register allocator.
  23  * @author      Sebastian Hack
  24  * @date        29.11.2005
  25  * @version     $Id$
  26  */
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include <stdlib.h>
  32 #include <time.h>
  33
  34 #include "obst.h"
  35 #include "pset.h"
  36 #include "list.h"
  37 #include "bitset.h"
  38 #include "iterator.h"
  39 #include "firm_config.h"
  40
  41 #include <libcore/lc_opts.h>
  42 #include <libcore/lc_opts_enum.h>
  43 #include <libcore/lc_timing.h>
  44
  45 #include "ircons_t.h"
  46 #include "irmode_t.h"
  47 #include "irgraph_t.h"
  48 #include "irprintf_t.h"
  49 #include "irgwalk.h"
  50 #include "ircons.h"
  51 #include "irdump.h"
  52 #include "irdom.h"
  53 #include "ircons.h"
  54 #include "irbitset.h"
  55 #include "irnode.h"
  56 #include "ircons.h"
  57 #include "debug.h"
  58 #include "xmalloc.h"
  59 #include "execfreq.h"
  60 #include "iredges_t.h"
  61
  62 #include "bechordal_t.h"
  63 #include "beabi.h"
  64 #include "bejavacoal.h"
  65 #include "beutil.h"
  66 #include "besched.h"
  67 #include "besched_t.h"
  68 #include "belive_t.h"
  69 #include "bearch_t.h"
  70 #include "beifg_t.h"
  71 #include "beifg_impl.h"
  72 #include "benode_t.h"
  73 #include "bestatevent.h"
  74 #include "bestat.h"
  75 #include "bemodule.h"
  76 #include "be_t.h"
  77 #include "bera.h"
  78 #include "beirg_t.h"
  79
  80 #include "bespillbelady.h"
  81 #include "bespillslots.h"
  82 #include "bespilloptions.h"
  83 #include "belower.h"
  84
  85 #ifdef WITH_ILP
  86 #include "bespillremat.h"
  87 #endif /* WITH_ILP */
  88
  89 #include "bejavacoal.h"
  90 #include "becopystat.h"
  91 #include "becopyopt.h"
  92 #include "bessadestr.h"
  93 #include "beverify.h"
  94 #include "benode_t.h"
  95
  96 static be_ra_chordal_opts_t options = {
  97         BE_CH_DUMP_NONE,
  98         BE_CH_LOWER_PERM_SWAP,
  99         BE_CH_VRFY_WARN,
 100         "",
 101         ""
 102 };
 103
 104 typedef struct _post_spill_env_t {
 105         be_chordal_env_t            cenv;
 106         be_irg_t                    *birg;
 107         const arch_register_class_t *cls;
 108         double                      pre_spill_cost;
 109 } post_spill_env_t;
 110
 111 static be_ra_timer_t ra_timer = {
 112         NULL,
 113         NULL,
 114         NULL,
 115         NULL,
 116         NULL,
 117         NULL,
 118         NULL,
 119         NULL,
 120         NULL,
 121         NULL,
 122         NULL,
 123 };
 124
 125 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 126         { "copy", BE_CH_LOWER_PERM_COPY },
 127         { "swap", BE_CH_LOWER_PERM_SWAP },
 128         { NULL, 0 }
 129 };
 130
 131 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 132         { NULL, 0 }
 133 };
 134
 135 static const lc_opt_enum_int_items_t dump_items[] = {
 136         { "none",       BE_CH_DUMP_NONE       },
 137         { "spill",      BE_CH_DUMP_SPILL      },
 138         { "live",       BE_CH_DUMP_LIVE       },
 139         { "color",      BE_CH_DUMP_COLOR      },
 140         { "copymin",    BE_CH_DUMP_COPYMIN    },
 141         { "ssadestr",   BE_CH_DUMP_SSADESTR   },
 142         { "tree",       BE_CH_DUMP_TREE_INTV  },
 143         { "constr",     BE_CH_DUMP_CONSTR     },
 144         { "lower",      BE_CH_DUMP_LOWER      },
 145         { "spillslots", BE_CH_DUMP_SPILLSLOTS },
 146         { "appel",      BE_CH_DUMP_APPEL      },
 147         { "all",        BE_CH_DUMP_ALL        },
 148         { NULL, 0 }
 149 };
 150
 151 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 152         { "off",    BE_CH_VRFY_OFF    },
 153         { "warn",   BE_CH_VRFY_WARN   },
 154         { "assert", BE_CH_VRFY_ASSERT },
 155         { NULL, 0 }
 156 };
 157
 158 static lc_opt_enum_int_var_t lower_perm_var = {
 159         &options.lower_perm_opt, lower_perm_items
 160 };
 161
 162 static lc_opt_enum_int_var_t dump_var = {
 163         &options.dump_flags, dump_items
 164 };
 165
 166 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 167         &options.vrfy_option, be_ch_vrfy_items
 168 };
 169
 170 static const lc_opt_table_entry_t be_chordal_options[] = {
 171         LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options", &lower_perm_var),
 172         LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
 173         LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options", &be_ch_vrfy_var),
 174         LC_OPT_LAST
 175 };
 176
 177 static void dump(unsigned mask, ir_graph *irg,
 178                                  const arch_register_class_t *cls,
 179                                  const char *suffix,
 180                                  void (*dump_func)(ir_graph *, const char *))
 181 {
 182         if((options.dump_flags & mask) == mask) {
 183                 if (cls) {
 184                         char buf[256];
 185                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 186                         be_dump(irg, buf, dump_func);
 187                 }
 188                 else
 189                         be_dump(irg, suffix, dump_func);
 190         }
 191 }
 192
 193 /**
 194  * Checks for every reload if it's user can perform the load on itself.
 195  */
 196 static void memory_operand_walker(ir_node *irn, void *env) {
 197         be_chordal_env_t *cenv = env;
 198         const arch_env_t *aenv = cenv->birg->main_env->arch_env;
 199         const ir_edge_t  *edge, *ne;
 200         ir_node          *block;
 201         ir_node          *spill;
 202
 203         if (! be_is_Reload(irn))
 204                 return;
 205
 206         /* only use memory operands, if the reload is only used by 1 node */
 207         if(get_irn_n_edges(irn) > 1)
 208                 return;
 209
 210         spill = be_get_Reload_mem(irn);
 211         block = get_nodes_block(irn);
 212
 213         foreach_out_edge_safe(irn, edge, ne) {
 214                 ir_node *src = get_edge_src_irn(edge);
 215                 int     pos  = get_edge_src_pos(edge);
 216
 217                 assert(src && "outedges broken!");
 218
 219                 if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 220                         arch_perform_memory_operand(aenv, src, spill, pos);
 221                 }
 222         }
 223
 224         /* kill the Reload */
 225         if (get_irn_n_edges(irn) == 0) {
 226                 sched_remove(irn);
 227                 set_irn_n(irn, be_pos_Reload_mem, new_Bad());
 228                 set_irn_n(irn, be_pos_Reload_frame, new_Bad());
 229         }
 230 }
 231
 232 /**
 233  * Starts a walk for memory operands if supported by the backend.
 234  */
 235 static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 236         irg_walk_graph(chordal_env->irg, NULL, memory_operand_walker, chordal_env);
 237 }
 238
 239 /**
 240  * Sorry for doing stats again...
 241  */
 242 typedef struct _node_stat_t {
 243         unsigned int n_phis;      /**< Phis of the current register class. */
 244         unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
 245         unsigned int n_copies;    /**< Copies */
 246         unsigned int n_perms;     /**< Perms */
 247         unsigned int n_spills;    /**< Spill nodes */
 248         unsigned int n_reloads;   /**< Reloads */
 249 } node_stat_t;
 250
 251 struct node_stat_walker {
 252         node_stat_t      *stat;
 253         const arch_env_t *arch_env;
 254         bitset_t         *mem_phis;
 255         const arch_register_class_t *cls;
 256 };
 257
 258 static void node_stat_walker(ir_node *irn, void *data)
 259 {
 260         struct node_stat_walker *env  = data;
 261         const arch_env_t        *aenv = env->arch_env;
 262
 263         if (arch_irn_consider_in_reg_alloc(aenv, env->cls, irn)) {
 264
 265                 /* if the node is a normal phi */
 266                 if(is_Phi(irn))
 267                         env->stat->n_phis++;
 268
 269                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
 270                         ++env->stat->n_spills;
 271
 272                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
 273                         ++env->stat->n_reloads;
 274
 275                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
 276                         ++env->stat->n_copies;
 277
 278                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
 279                         ++env->stat->n_perms;
 280         }
 281
 282         /* a mem phi is a PhiM with a mem phi operand or a Spill operand */
 283         else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
 284                 int i;
 285
 286                 for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
 287                         ir_node *op = get_irn_n(irn, i);
 288
 289                         if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
 290                                 bitset_add_irn(env->mem_phis, irn);
 291                                 env->stat->n_mem_phis++;
 292                                 break;
 293                         }
 294                 }
 295         }
 296 }
 297
 298 static void node_stats(be_irg_t *birg, const arch_register_class_t *cls, node_stat_t *stat)
 299 {
 300         struct node_stat_walker env;
 301
 302         memset(stat, 0, sizeof(stat[0]));
 303         env.arch_env = birg->main_env->arch_env;
 304         env.mem_phis = bitset_irg_malloc(birg->irg);
 305         env.stat     = stat;
 306         env.cls      = cls;
 307         irg_walk_graph(birg->irg, NULL, node_stat_walker, &env);
 308         bitset_free(env.mem_phis);
 309 }
 310
 311 static void insn_count_walker(ir_node *irn, void *data)
 312 {
 313         int *cnt = data;
 314
 315         switch(get_irn_opcode(irn)) {
 316         case iro_Proj:
 317         case iro_Phi:
 318         case iro_Start:
 319         case iro_End:
 320                 break;
 321         default:
 322                 (*cnt)++;
 323         }
 324 }
 325
 326 static unsigned int count_insns(ir_graph *irg)
 327 {
 328         int cnt = 0;
 329         irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
 330         return cnt;
 331 }
 332
 333 /**
 334  * Initialize all timers.
 335  */
 336 static void be_init_timer(be_options_t *main_opts)
 337 {
 338         if (main_opts->timing == BE_TIME_ON) {
 339                 ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
 340                 ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
 341                 ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
 342                 ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
 343                 ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
 344                 ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
 345                 ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
 346                 ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
 347                 ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
 348                 ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
 349                 ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 350
 351                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 352                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 353                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 354                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 355                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 356                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 357                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 358                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 359                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 360                 LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 361                 LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 362
 363                 global_ra_timer = &ra_timer;
 364         }
 365 }
 366
 367 #define BE_TIMER_INIT(main_opts)        be_init_timer(main_opts)
 368
 369 #define BE_TIMER_PUSH(timer)                                                            \
 370         if (main_opts->timing == BE_TIME_ON) {                                              \
 371                 if (! lc_timer_push(timer)) {                                                   \
 372                         if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
 373                                 assert(!"Timer already on stack, cannot be pushed twice.");             \
 374                         else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
 375                                 fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 376                                         lc_timer_get_name(timer));                                          \
 377                 }                                                                               \
 378         }
 379 #define BE_TIMER_POP(timer)                                                                    \
 380         if (main_opts->timing == BE_TIME_ON) {                                                     \
 381                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 382                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                                          \
 383                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 384                 else if (options.vrfy_option == BE_CH_VRFY_WARN && tmp != timer)                       \
 385                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 386                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 387                 timer = tmp;                                                                           \
 388         }
 389
 390 /**
 391  * Perform things which need to be done per register class before spilling.
 392  */
 393 static void pre_spill(post_spill_env_t *pse, const arch_register_class_t *cls)
 394 {
 395         be_chordal_env_t    *chordal_env = &pse->cenv;
 396         be_irg_t            *birg        = pse->birg;
 397         ir_graph            *irg         = be_get_birg_irg(birg);
 398         const be_main_env_t *main_env    = birg->main_env;
 399         node_stat_t          node_stat;
 400
 401         pse->cls                   = cls;
 402         chordal_env->cls           = cls;
 403         chordal_env->border_heads  = pmap_create();
 404         chordal_env->ignore_colors = bitset_malloc(chordal_env->cls->n_regs);
 405
 406         be_assure_liveness(birg);
 407         be_liveness_assure_chk(be_get_birg_liveness(birg));
 408         stat_ev_ctx_push_str("bechordal_cls", pse->cls->name);
 409         stat_ev_do(node_stats(birg, pse->cls, &node_stat));
 410         stat_ev_do(pse->pre_spill_cost = be_estimate_irg_costs(irg, main_env->arch_env, birg->exec_freq));
 411         stat_ev_dbl("phis_before_spill", node_stat.n_phis);
 412
 413         /* put all ignore registers into the ignore register set. */
 414         be_put_ignore_regs(birg, pse->cls, chordal_env->ignore_colors);
 415
 416         be_pre_spill_prepare_constr(chordal_env);
 417         dump(BE_CH_DUMP_CONSTR, birg->irg, pse->cls, "-constr-pre", dump_ir_block_graph_sched);
 418
 419         stat_ev_ctx_pop("bechordal_cls");
 420 }
 421
 422 /**
 423  * Perform things which need to be done per register class after spilling.
 424  */
 425 static void post_spill(post_spill_env_t *pse, int iteration) {
 426         be_chordal_env_t    *chordal_env = &pse->cenv;
 427         be_irg_t            *birg        = pse->birg;
 428         ir_graph            *irg         = birg->irg;
 429         const be_main_env_t *main_env    = birg->main_env;
 430         be_options_t        *main_opts   = main_env->options;
 431         node_stat_t         node_stat;
 432         int                 colors_n     = arch_register_class_n_regs(chordal_env->cls);
 433         int             allocatable_regs = colors_n - be_put_ignore_regs(birg, chordal_env->cls, NULL);
 434
 435         /* some special classes contain only ignore regs, no work to be done */
 436         if (allocatable_regs > 0) {
 437
 438                 stat_ev_ctx_push_str("cls", pse->cls->name);
 439                 stat_ev_do(node_stats(birg, pse->cls, &node_stat));
 440                 stat_ev_dbl("phis_after_spill", node_stat.n_phis);
 441                 stat_ev_dbl("mem_phis", node_stat.n_mem_phis);
 442                 stat_ev_dbl("reloads", node_stat.n_reloads);
 443                 stat_ev_dbl("spills", node_stat.n_spills);
 444                 stat_ev_dbl("spillcosts", be_estimate_irg_costs(irg, main_env->arch_env, birg->exec_freq) - pse->pre_spill_cost);
 445
 446                 /*
 447                         If we have a backend provided spiller, post spill is
 448                         called in a loop after spilling for each register class.
 449                         But we only need to fix stack nodes once in this case.
 450                 */
 451                 if (iteration == 0) {
 452                         check_for_memory_operands(chordal_env);
 453                         be_abi_fix_stack_nodes(birg->abi);
 454                 }
 455
 456                 BE_TIMER_PUSH(ra_timer.t_verify);
 457
 458                 /* verify schedule and register pressure */
 459                 if (chordal_env->opts->vrfy_option == BE_CH_VRFY_WARN) {
 460                         be_verify_schedule(birg);
 461                         be_verify_register_pressure(birg, pse->cls, irg);
 462                 }
 463                 else if (chordal_env->opts->vrfy_option == BE_CH_VRFY_ASSERT) {
 464                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 465                         assert(be_verify_register_pressure(birg, pse->cls, irg)
 466                                 && "Register pressure verification failed");
 467                 }
 468                 BE_TIMER_POP(ra_timer.t_verify);
 469
 470                 /* Color the graph. */
 471                 BE_TIMER_PUSH(ra_timer.t_color);
 472                 be_ra_chordal_color(chordal_env);
 473                 BE_TIMER_POP(ra_timer.t_color);
 474
 475                 dump(BE_CH_DUMP_CONSTR, irg, pse->cls, "-color", dump_ir_block_graph_sched);
 476
 477                 /* Create the ifg with the selected flavor */
 478                 BE_TIMER_PUSH(ra_timer.t_ifg);
 479                 chordal_env->ifg = be_create_ifg(chordal_env);
 480                 BE_TIMER_POP(ra_timer.t_ifg);
 481
 482                 {
 483                         be_ifg_stat_t stat;
 484
 485                         stat_ev_do(be_ifg_stat(birg, chordal_env->ifg, &stat));
 486                         stat_ev_dbl("ifg_nodes", stat.n_nodes);
 487                         stat_ev_dbl("ifg_edges", stat.n_edges);
 488                         stat_ev_dbl("ifg_comps", stat.n_comps);
 489
 490                         stat_ev_do(node_stats(birg, pse->cls, &node_stat));
 491                         stat_ev_dbl("perms_before_coal", node_stat.n_perms);
 492                         stat_ev_dbl("copies_before_coal", node_stat.n_copies);
 493                 }
 494
 495                 /* copy minimization */
 496                 BE_TIMER_PUSH(ra_timer.t_copymin);
 497                 co_driver(chordal_env);
 498                 BE_TIMER_POP(ra_timer.t_copymin);
 499
 500                 dump(BE_CH_DUMP_COPYMIN, irg, pse->cls, "-copymin", dump_ir_block_graph_sched);
 501
 502                 BE_TIMER_PUSH(ra_timer.t_ssa);
 503
 504                 /* ssa destruction */
 505                 stat_ev_ctx_push_str("berachordal_phase", "ssadestr");
 506                 be_ssa_destruction(chordal_env);
 507                 stat_ev_ctx_pop("berachordal_phase");
 508
 509                 BE_TIMER_POP(ra_timer.t_ssa);
 510
 511                 dump(BE_CH_DUMP_SSADESTR, irg, pse->cls, "-ssadestr", dump_ir_block_graph_sched);
 512
 513                 BE_TIMER_PUSH(ra_timer.t_verify);
 514                 if (chordal_env->opts->vrfy_option != BE_CH_VRFY_OFF) {
 515                         be_ssa_destruction_check(chordal_env);
 516                 }
 517                 BE_TIMER_POP(ra_timer.t_verify);
 518
 519                 stat_ev_do(node_stats(birg, pse->cls, &node_stat));
 520                 stat_ev_dbl("perms_after_coal", node_stat.n_perms);
 521                 stat_ev_dbl("copies_after_coal", node_stat.n_copies);
 522                 stat_ev_ctx_pop("cls");
 523
 524                 /* the ifg exists only if there are allocatable regs */
 525                 be_ifg_free(chordal_env->ifg);
 526         }
 527
 528         /* free some always allocated data structures */
 529         pmap_destroy(chordal_env->border_heads);
 530         bitset_free(chordal_env->ignore_colors);
 531 }
 532
 533 /**
 534  * Performs chordal register allocation for each register class on given irg.
 535  *
 536  * @param birg  Backend irg object
 537  * @return Structure containing timer for the single phases or NULL if no timing requested.
 538  */
 539 static void be_ra_chordal_main(be_irg_t *birg)
 540 {
 541         const be_main_env_t *main_env  = birg->main_env;
 542         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 543         ir_graph            *irg       = birg->irg;
 544         be_options_t        *main_opts = main_env->options;
 545         int                 j, m;
 546         be_chordal_env_t    chordal_env;
 547         struct obstack      obst;
 548
 549         BE_TIMER_INIT(main_opts);
 550         BE_TIMER_PUSH(ra_timer.t_other);
 551         BE_TIMER_PUSH(ra_timer.t_prolog);
 552
 553         be_assure_dom_front(birg);
 554         be_assure_liveness(birg);
 555
 556         chordal_env.obst          = &obst;
 557         chordal_env.opts          = &options;
 558         chordal_env.irg           = irg;
 559         chordal_env.birg          = birg;
 560         chordal_env.border_heads  = NULL;
 561         chordal_env.ifg           = NULL;
 562         chordal_env.ignore_colors = NULL;
 563
 564         obstack_init(&obst);
 565
 566         BE_TIMER_POP(ra_timer.t_prolog);
 567
 568         be_stat_ev("insns_before", count_insns(irg));
 569
 570
 571
 572         if (! arch_code_generator_has_spiller(birg->cg)) {
 573                 /* use one of the generic spiller */
 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                         post_spill_env_t pse;
 578                         const arch_register_class_t *cls
 579                                 = arch_isa_get_reg_class(isa, j);
 580
 581                         if(arch_register_class_flags(cls) & arch_register_class_flag_manual_ra)
 582                                 continue;
 583
 584
 585                         memcpy(&pse.cenv, &chordal_env, sizeof(chordal_env));
 586                         pse.birg = birg;
 587                         pre_spill(&pse, cls);
 588
 589 #if 0
 590                         /* this is a hack, TODO remove me later */
 591                         if(j == 2) {
 592                                 be_do_stat_reg_pressure(birg);
 593                         }
 594 #endif
 595
 596                         BE_TIMER_PUSH(ra_timer.t_spill);
 597                         be_do_spill(birg, cls);
 598                         BE_TIMER_POP(ra_timer.t_spill);
 599
 600                         dump(BE_CH_DUMP_SPILL, irg, pse.cls, "-spill",
 601                              dump_ir_block_graph_sched);
 602
 603                         post_spill(&pse, 0);
 604                 }
 605         } else {
 606                 post_spill_env_t *pse;
 607
 608                 /* the backend has it's own spiller */
 609                 m = arch_isa_get_n_reg_class(isa);
 610
 611                 pse = alloca(m * sizeof(pse[0]));
 612
 613                 for (j = 0; j < m; ++j) {
 614                         memcpy(&pse[j].cenv, &chordal_env, sizeof(chordal_env));
 615                         pse[j].birg = birg;
 616                         pre_spill(&pse[j], pse[j].cls);
 617                 }
 618
 619                 BE_TIMER_PUSH(ra_timer.t_spill);
 620                 arch_code_generator_spill(birg->cg, birg);
 621                 BE_TIMER_POP(ra_timer.t_spill);
 622                 dump(BE_CH_DUMP_SPILL, irg, NULL, "-spill", dump_ir_block_graph_sched);
 623
 624                 for (j = 0; j < m; ++j) {
 625                         post_spill(&pse[j], j);
 626                 }
 627         }
 628
 629
 630         be_verify_register_allocation(birg);
 631
 632         BE_TIMER_PUSH(ra_timer.t_epilog);
 633         lower_nodes_after_ra(birg, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 634         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 635
 636         obstack_free(&obst, NULL);
 637         be_liveness_invalidate(be_get_birg_liveness(birg));
 638         BE_TIMER_POP(ra_timer.t_epilog);
 639
 640         BE_TIMER_POP(ra_timer.t_other);
 641
 642         be_stat_ev("insns_after", count_insns(irg));
 643
 644         return;
 645 }
 646
 647 static be_ra_t be_ra_chordal_allocator = {
 648         be_ra_chordal_main,
 649 };
 650
 651 void be_init_chordal_main(void)
 652 {
 653         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 654         lc_opt_entry_t *ra_grp = lc_opt_get_grp(be_grp, "ra");
 655         lc_opt_entry_t *chordal_grp = lc_opt_get_grp(ra_grp, "chordal");
 656
 657         lc_opt_add_table(chordal_grp, be_chordal_options);
 658
 659         be_register_allocator("chordal", &be_ra_chordal_allocator);
 660 }
 661
 662 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_chordal_main);