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

   1 /**
   2  * Backend driver.
   3  * @author Sebastian Hack
   4  * @date   25.11.2004
   5  * @cvsid  $Id$
   6  */
   7 #ifdef HAVE_CONFIG_H
   8 #include "config.h"
   9 #endif
  10
  11 #include <stdarg.h>
  12 #include <stdio.h>
  13
  14 #ifdef WITH_LIBCORE
  15 #include <libcore/lc_opts.h>
  16 #include <libcore/lc_opts_enum.h>
  17 #include <libcore/lc_timing.h>
  18 #endif /* WITH_LIBCORE */
  19
  20 #include "obst.h"
  21 #include "bitset.h"
  22
  23 #include "irprog.h"
  24 #include "irgopt.h"
  25 #include "irgraph.h"
  26 #include "irdump.h"
  27 #include "phiclass.h"
  28 #include "irdom_t.h"
  29 #include "iredges_t.h"
  30 #include "irloop_t.h"
  31 #include "irtools.h"
  32 #include "irvrfy.h"
  33 #include "return.h"
  34 #include "firmstat.h"
  35 #include "cfopt.h"
  36 #include "execfreq.h"
  37
  38 #include "bearch.h"
  39 #include "firm/bearch_firm.h"
  40 #include "ia32/bearch_ia32.h"
  41 #include "arm/bearch_arm.h"
  42 #include "ppc32/bearch_ppc32.h"
  43 #include "mips/bearch_mips.h"
  44
  45 #include "be_t.h"
  46 #include "benumb_t.h"
  47 #include "beutil.h"
  48 #include "benode_t.h"
  49 #include "beirgmod.h"
  50 #include "besched_t.h"
  51 #include "belistsched.h"
  52 #include "belive_t.h"
  53 #include "bespillbelady.h"
  54 #include "bera.h"
  55 #include "beraextern.h"
  56 #include "bechordal_t.h"
  57 #include "beifg.h"
  58 #include "beifg_impl.h"
  59 #include "becopyopt.h"
  60 #include "becopystat.h"
  61 #include "bessadestr.h"
  62 #include "beabi.h"
  63 #include "belower.h"
  64 #include "beschedmris.h"
  65 #include "bestat.h"
  66 #include "beverify.h"
  67 #include "beprofile.h"
  68
  69 /* options visible for anyone */
  70 static be_options_t be_options = {
  71         DUMP_NONE,                         /* dump flags */
  72         BE_TIME_OFF,                       /* no timing */
  73         BE_SCHED_SELECT_HEUR,              /* mueller heuristic selector */
  74         0,                                 /* no opt profile */
  75         0,                                 /* disable mris */
  76         1,                                 /* try to omit frame pointer */
  77         BE_VRFY_WARN,                      /* verification level: warn */
  78         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  79         "cplex"                            /* ilp solver */
  80 };
  81
  82 /* config file. */
  83 static char config_file[256] = { 0 };
  84
  85 /* register allocator to use. */
  86 static const be_ra_t *ra = &be_ra_chordal_allocator;
  87
  88 /* back end instruction set architecture to use */
  89 static const arch_isa_if_t *isa_if = &ia32_isa_if;
  90
  91 #ifdef WITH_LIBCORE
  92
  93 static lc_opt_entry_t *be_grp_root = NULL;
  94
  95 /* possible dumping options */
  96 static const lc_opt_enum_mask_items_t dump_items[] = {
  97         { "none",       DUMP_NONE },
  98         { "initial",    DUMP_INITIAL },
  99         { "abi",        DUMP_ABI    },
 100         { "sched",      DUMP_SCHED  },
 101         { "prepared",   DUMP_PREPARED },
 102         { "regalloc",   DUMP_RA },
 103         { "final",      DUMP_FINAL },
 104         { "be",         DUMP_BE },
 105         { "all",        2 * DUMP_BE - 1 },
 106         { NULL,         0 }
 107 };
 108
 109 /* register allocators */
 110 static const lc_opt_enum_const_ptr_items_t ra_items[] = {
 111         { "chordal",  &be_ra_chordal_allocator },
 112         { "external", &be_ra_external_allocator },
 113         { NULL,      NULL }
 114 };
 115
 116 /* instruction set architectures. */
 117 static const lc_opt_enum_const_ptr_items_t isa_items[] = {
 118         { "ia32",    &ia32_isa_if },
 119 #if 0
 120         { "arm",     &arm_isa_if },
 121         { "ppc32",   &ppc32_isa_if },
 122         { "mips",    &mips_isa_if },
 123 #endif
 124         { NULL,      NULL }
 125 };
 126
 127 /* verify options. */
 128 static const lc_opt_enum_int_items_t vrfy_items[] = {
 129         { "off",    BE_VRFY_OFF    },
 130         { "warn",   BE_VRFY_WARN   },
 131         { "assert", BE_VRFY_ASSERT },
 132         { NULL,     0 }
 133 };
 134
 135 /* schedule selector options. */
 136 static const lc_opt_enum_int_items_t sched_select_items[] = {
 137         { "trivial",  BE_SCHED_SELECT_TRIVIAL  },
 138         { "random",   BE_SCHED_SELECT_RANDOM },
 139         { "regpress", BE_SCHED_SELECT_REGPRESS },
 140         { "muchnik",  BE_SCHED_SELECT_MUCHNIK  },
 141         { "heur",     BE_SCHED_SELECT_HEUR     },
 142         { "hmuchnik", BE_SCHED_SELECT_HMUCHNIK },
 143         { NULL,     0 }
 144 };
 145
 146 static lc_opt_enum_mask_var_t dump_var = {
 147         &be_options.dump_flags, dump_items
 148 };
 149
 150 static lc_opt_enum_const_ptr_var_t ra_var = {
 151         (const void **) &ra, ra_items
 152 };
 153
 154 static lc_opt_enum_const_ptr_var_t isa_var = {
 155         (const void **) &isa_if, isa_items
 156 };
 157
 158 static lc_opt_enum_int_var_t vrfy_var = {
 159         &be_options.vrfy_option, vrfy_items
 160 };
 161
 162 static lc_opt_enum_int_var_t sched_select_var = {
 163         &be_options.sched_select, sched_select_items
 164 };
 165
 166 static const lc_opt_table_entry_t be_main_options[] = {
 167         LC_OPT_ENT_STR      ("config",       "read another config file containing backend options",                 config_file, sizeof(config_file)),
 168         LC_OPT_ENT_ENUM_MASK("dump",         "dump irg on several occasions",                                       &dump_var),
 169         LC_OPT_ENT_ENUM_PTR ("ra",           "register allocator",                                                  &ra_var),
 170         LC_OPT_ENT_ENUM_PTR ("isa",          "the instruction set architecture",                                    &isa_var),
 171         LC_OPT_ENT_NEGBOOL  ("noomitfp",     "do not omit frame pointer",                                           &be_options.omit_fp),
 172         LC_OPT_ENT_ENUM_PTR ("vrfy",         "verify the backend irg (off, warn, assert)",                          &vrfy_var),
 173         LC_OPT_ENT_BOOL     ("time",         "get backend timing statistics",                                       &be_options.timing),
 174         LC_OPT_ENT_BOOL     ("profile",      "instrument the code for execution count profiling",                   &be_options.opt_profile),
 175         LC_OPT_ENT_BOOL     ("sched.mris",   "enable mris schedule preparation",                                    &be_options.mris),
 176         LC_OPT_ENT_ENUM_PTR ("sched.select", "schedule node selector (trivial, regpress, muchnik, heur, hmuchnik)", &sched_select_var),
 177
 178 #ifdef WITH_ILP
 179         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 180         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 181 #endif /* WITH_ILP */
 182         { NULL }
 183 };
 184
 185 #endif /* WITH_LIBCORE */
 186
 187 void be_opt_register(void)
 188 {
 189 #ifdef WITH_LIBCORE
 190         int i;
 191         lc_opt_entry_t *be_grp_ra;
 192         static int run_once = 0;
 193
 194         if (! run_once) {
 195                 run_once    = 1;
 196                 be_grp_root = lc_opt_get_grp(firm_opt_get_root(), "be");
 197                 be_grp_ra   = lc_opt_get_grp(be_grp_root, "ra");
 198
 199                 lc_opt_add_table(be_grp_root, be_main_options);
 200
 201                 /* register allocator options */
 202                 for(i = 0; ra_items[i].name != NULL; ++i) {
 203                         const be_ra_t *ra = ra_items[i].value;
 204                         ra->register_options(be_grp_ra);
 205                 }
 206
 207                 /* register isa options */
 208                 for(i = 0; isa_items[i].name != NULL; ++i) {
 209                         const arch_isa_if_t *isa = isa_items[i].value;
 210                         isa->register_options(be_grp_root);
 211                 }
 212         }
 213 #endif /* WITH_LIBCORE */
 214 }
 215
 216 /* Parse one argument. */
 217 int be_parse_arg(const char *arg) {
 218 #ifdef WITH_LIBCORE
 219         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 220                 lc_opt_print_help(be_grp_root, stdout);
 221                 return -1;
 222         }
 223         return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL);
 224 #else
 225         return 0;
 226 #endif /* WITH_LIBCORE */
 227 }
 228
 229 /** The be parameters returned by default, all off. */
 230 const static backend_params be_params = {
 231         NULL,
 232         NULL,
 233         0,
 234         NULL,
 235 };
 236
 237 /* Perform schedule verification if requested. */
 238 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) {
 239         if (vrfy_opt == BE_VRFY_WARN) {
 240                 be_verify_schedule(irg);
 241         }
 242         else if (vrfy_opt == BE_VRFY_ASSERT) {
 243                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 244         }
 245 }
 246
 247 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 248 const backend_params *be_init(void)
 249 {
 250         be_opt_register();
 251
 252         be_sched_init();
 253         be_numbering_init();
 254         be_copy_opt_init();
 255         copystat_init();
 256         phi_class_init();
 257
 258         if (isa_if->get_params)
 259                 return isa_if->get_params();
 260         return &be_params;
 261 }
 262
 263 /**
 264  * Initializes the main environment for the backend.
 265  *
 266  * @param env          an empty environment
 267  * @param file_handle  the file handle where the output will be written to
 268  */
 269 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 270 {
 271         memset(env, 0, sizeof(*env));
 272         obstack_init(&env->obst);
 273         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 274         env->options  = &be_options;
 275         FIRM_DBG_REGISTER(env->dbg, "be.main");
 276
 277         arch_env_init(env->arch_env, isa_if, file_handle, env);
 278
 279         /* Register the irn handler of the architecture */
 280         if (arch_isa_get_irn_handler(env->arch_env->isa))
 281                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 282
 283         /*
 284          * Register the node handler of the back end infrastructure.
 285          * This irn handler takes care of the platform independent
 286          * spill, reload and perm nodes.
 287          */
 288         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 289         env->phi_handler = be_phi_handler_new(env->arch_env);
 290         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 291
 292         return env;
 293 }
 294
 295 static void be_done_env(be_main_env_t *env)
 296 {
 297         env->arch_env->isa->impl->done(env->arch_env->isa);
 298         be_phi_handler_free(env->phi_handler);
 299         obstack_free(&env->obst, NULL);
 300 }
 301
 302 /**
 303  * A wrapper around a firm dumper. Dumps only, if
 304  * flags are enabled.
 305  *
 306  * @param mask    a bitmask containing the reason what will be dumped
 307  * @param irg     the IR graph to dump
 308  * @param suffix  the suffix for the dumper
 309  * @param dumper  the dumper to be called
 310  */
 311 static void dump(int mask, ir_graph *irg, const char *suffix,
 312                  void (*dumper)(ir_graph *, const char *))
 313 {
 314         if(be_options.dump_flags & mask)
 315                 be_dump(irg, suffix, dumper);
 316 }
 317
 318 /**
 319  * Prepare a backend graph for code generation and initialize its birg
 320  */
 321 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 322 {
 323         memset(birg, 0, sizeof(*birg));
 324         birg->irg = irg;
 325         birg->main_env = env;
 326
 327         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 328         edges_activate_kind(irg, EDGE_KIND_DEP);
 329
 330         DBG((env->dbg, LEVEL_2, "====> IRG: %F\n", irg));
 331         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 332
 333         be_stat_init_irg(env->arch_env, irg);
 334         be_do_stat_nodes(irg, "01 Begin");
 335
 336         /* set the current graph (this is important for several firm functions) */
 337         current_ir_graph = irg;
 338
 339         /* Normalize proj nodes. */
 340         normalize_proj_nodes(irg);
 341
 342         /* Make just one return node. */
 343         normalize_one_return(irg);
 344
 345         /* Remove critical edges */
 346         remove_critical_cf_edges(irg);
 347
 348         /* Compute the dominance information. */
 349         free_dom(irg);
 350         compute_doms(irg);
 351
 352         /* Ensure, that the ir_edges are computed. */
 353         edges_assure(irg);
 354
 355         /* check, if the dominance property is fulfilled. */
 356         be_check_dominance(irg);
 357
 358         /* reset the phi handler. */
 359         be_phi_handler_reset(env->phi_handler);
 360 }
 361
 362 #ifdef WITH_LIBCORE
 363
 364 #define BE_TIMER_PUSH(timer)                                                        \
 365         if (be_options.timing == BE_TIME_ON) {                                          \
 366                 int res = lc_timer_push(timer);                                             \
 367                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 368                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 369                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 370                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 371                                 lc_timer_get_name(timer));                                          \
 372         }
 373 #define BE_TIMER_POP(timer)                                                                    \
 374         if (be_options.timing == BE_TIME_ON) {                                                     \
 375                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 376                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 377                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 378                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 379                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 380                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 381                 timer = tmp;                                                                           \
 382         }
 383
 384 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 385
 386 #else
 387
 388 #define BE_TIMER_PUSH(timer)
 389 #define BE_TIMER_POP(timer)
 390 #define BE_TIMER_ONLY(code)
 391
 392 #endif /* WITH_LIBCORE */
 393
 394
 395 /**
 396  * The Firm backend main loop.
 397  * Do architecture specific lowering for all graphs
 398  * and call the architecture specific code generator.
 399  *
 400  * @param file_handle   the file handle the output will be written to
 401  */
 402 static void be_main_loop(FILE *file_handle, const char *asm_file_name)
 403 {
 404         int i;
 405         arch_isa_t *isa;
 406         be_main_env_t env;
 407         unsigned num_nodes_b = 0;
 408         unsigned num_nodes_a = 0;
 409         unsigned num_nodes_r = 0;
 410         char prof_filename[256];
 411         static const char suffix[] = ".prof";
 412         be_irg_t *birgs;
 413         unsigned num_birgs;
 414
 415 #ifdef WITH_LIBCORE
 416         lc_timer_t *t_abi      = NULL;
 417         lc_timer_t *t_codegen  = NULL;
 418         lc_timer_t *t_sched    = NULL;
 419         lc_timer_t *t_constr   = NULL;
 420         lc_timer_t *t_regalloc = NULL;
 421         lc_timer_t *t_finish   = NULL;
 422         lc_timer_t *t_emit     = NULL;
 423         lc_timer_t *t_other    = NULL;
 424         lc_timer_t *t_verify   = NULL;
 425         be_ra_timer_t *ra_timer;
 426
 427         if (be_options.timing == BE_TIME_ON) {
 428                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 429                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 430                 t_sched    = lc_timer_register("sched",    "scheduling");
 431                 t_constr   = lc_timer_register("constr",   "assure constraints");
 432                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 433                 t_finish   = lc_timer_register("finish",   "graph finish");
 434                 t_emit     = lc_timer_register("emiter",   "code emiter");
 435                 t_verify   = lc_timer_register("verify",   "graph verification");
 436                 t_other    = lc_timer_register("other",    "other");
 437         }
 438 #endif /* WITH_LIBCORE */
 439
 440         be_init_env(&env, file_handle);
 441
 442         isa = arch_env_get_isa(env.arch_env);
 443
 444         /* we might need 1 birg more for instrumentation constructor */
 445         num_birgs = get_irp_n_irgs();
 446         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 447
 448         /* First: initialize all birgs */
 449         for(i = 0; i < get_irp_n_irgs(); ++i) {
 450                 ir_graph *irg = get_irp_irg(i);
 451
 452                 initialize_birg(&birgs[i], irg, &env);
 453         }
 454
 455         /*
 456                 Get the filename for the profiling data.
 457                 Beware: '\0' is already included in sizeof(suffix)
 458         */
 459         memset(prof_filename, 0, sizeof(prof_filename));
 460         strncpy(prof_filename, asm_file_name, sizeof(prof_filename) - sizeof(suffix));
 461         strcat(prof_filename, suffix);
 462
 463         /*
 464                 Next: Either instruments all irgs with profiling code
 465                 or try to read in profile data for current translation unit.
 466         */
 467         if (be_options.opt_profile) {
 468                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename);
 469                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 470                 num_birgs++;
 471                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 472         }
 473         else {
 474                 be_profile_read(prof_filename);
 475         }
 476
 477         /* For all graphs */
 478         for (i = 0; i < num_birgs; ++i) {
 479                 be_irg_t *birg = & birgs[i];
 480                 ir_graph *irg  = birg->irg;
 481                 optimization_state_t state;
 482                 const arch_code_generator_if_t *cg_if;
 483
 484                 /* stop and reset timers */
 485                 BE_TIMER_ONLY(
 486                         LC_STOP_AND_RESET_TIMER(t_abi);
 487                         LC_STOP_AND_RESET_TIMER(t_codegen);
 488                         LC_STOP_AND_RESET_TIMER(t_sched);
 489                         LC_STOP_AND_RESET_TIMER(t_constr);
 490                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 491                         LC_STOP_AND_RESET_TIMER(t_finish);
 492                         LC_STOP_AND_RESET_TIMER(t_emit);
 493                         LC_STOP_AND_RESET_TIMER(t_verify);
 494                         LC_STOP_AND_RESET_TIMER(t_other);
 495                 );
 496                 BE_TIMER_PUSH(t_other);   /* t_other */
 497
 498                 /**
 499                  * Create execution frequencies from profile data or estimate some
 500                  */
 501                 if(be_profile_has_data()) {
 502                         birg->execfreqs = be_create_execfreqs_from_profile(irg);
 503                 } else {
 504                         birg->execfreqs = compute_execfreq(irg, 10);
 505                 }
 506
 507                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 508
 509                 /* Get the code generator interface. */
 510                 cg_if = isa->impl->get_code_generator_if(isa);
 511
 512                 /* get a code generator for this graph. */
 513                 birg->cg = cg_if->init(birg);
 514
 515                 /* some transformations need to be done before abi introduce */
 516                 arch_code_generator_before_abi(birg->cg);
 517
 518                 /* set the current graph (this is important for several firm functions) */
 519                 current_ir_graph = irg;
 520
 521                 /* reset the phi handler. */
 522                 be_phi_handler_reset(env.phi_handler);
 523
 524                 /* implement the ABI conventions. */
 525                 BE_TIMER_PUSH(t_abi);
 526                 birg->abi = be_abi_introduce(birg);
 527                 BE_TIMER_POP(t_abi);
 528
 529                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 530                 be_do_stat_nodes(irg, "02 Abi");
 531
 532                 /* generate code */
 533                 BE_TIMER_PUSH(t_codegen);
 534                 arch_code_generator_prepare_graph(birg->cg);
 535                 BE_TIMER_POP(t_codegen);
 536
 537                 be_do_stat_nodes(irg, "03 Prepare");
 538
 539                 /*
 540                         Since the code generator made a lot of new nodes and skipped
 541                         a lot of old ones, we should do dead node elimination here.
 542                         Note that this requires disabling the edges here.
 543                  */
 544                 edges_deactivate(irg);
 545                 //dead_node_elimination(irg);
 546                 edges_activate(irg);
 547
 548                 /* Compute loop nesting information (for weighting copies) */
 549                 construct_cf_backedges(irg);
 550                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 551                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 552
 553                 /* let backend prepare scheduling */
 554                 BE_TIMER_PUSH(t_codegen);
 555                 arch_code_generator_before_sched(birg->cg);
 556                 BE_TIMER_POP(t_codegen);
 557
 558                 /* schedule the irg */
 559                 BE_TIMER_PUSH(t_sched);
 560                 list_sched(birg, &be_options);
 561                 BE_TIMER_POP(t_sched);
 562
 563                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 564
 565                 /* check schedule */
 566                 BE_TIMER_PUSH(t_verify);
 567                 be_sched_vrfy(irg, be_options.vrfy_option);
 568                 BE_TIMER_POP(t_verify);
 569
 570                 be_do_stat_nodes(irg, "04 Schedule");
 571
 572                 /* introduce patterns to assure constraints */
 573                 BE_TIMER_PUSH(t_constr);
 574                 /* we switch off optimizations here, because they might cause trouble */
 575                 save_optimization_state(&state);
 576                 set_optimize(0);
 577                 set_opt_normalize(0);
 578
 579                 /* add Keeps for should_be_different constrained nodes  */
 580                 /* beware: needs schedule due to usage of be_ssa_constr */
 581                 assure_constraints(birg);
 582                 BE_TIMER_POP(t_constr);
 583
 584                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 585                 be_do_stat_nodes(irg, "05 Constraints");
 586
 587                 /* connect all stack modifying nodes together (see beabi.c) */
 588                 BE_TIMER_PUSH(t_abi);
 589                 be_abi_fix_stack_nodes(birg->abi, NULL);
 590                 BE_TIMER_POP(t_abi);
 591
 592                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 593
 594                 /* check schedule */
 595                 BE_TIMER_PUSH(t_verify);
 596                 be_sched_vrfy(irg, be_options.vrfy_option);
 597                 BE_TIMER_POP(t_verify);
 598
 599                 /* do some statistics */
 600                 be_do_stat_reg_pressure(birg);
 601
 602                 /* stuff needs to be done after scheduling but before register allocation */
 603                 BE_TIMER_PUSH(t_codegen);
 604                 arch_code_generator_before_ra(birg->cg);
 605                 BE_TIMER_POP(t_codegen);
 606
 607                 /* Do register allocation */
 608                 BE_TIMER_PUSH(t_regalloc);
 609                 ra_timer = ra->allocate(birg);
 610                 BE_TIMER_POP(t_regalloc);
 611
 612                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 613                 be_do_stat_nodes(irg, "06 Register Allocation");
 614
 615                 /* let the code generator prepare the graph for emitter */
 616                 BE_TIMER_PUSH(t_finish);
 617                 arch_code_generator_after_ra(birg->cg);
 618                 BE_TIMER_POP(t_finish);
 619
 620                 /* fix stack offsets */
 621                 BE_TIMER_PUSH(t_abi);
 622                 be_abi_fix_stack_nodes(birg->abi, NULL);
 623                 be_remove_dead_nodes_from_schedule(irg);
 624                 be_abi_fix_stack_bias(birg->abi);
 625                 BE_TIMER_POP(t_abi);
 626
 627                 BE_TIMER_PUSH(t_finish);
 628                 arch_code_generator_finish(birg->cg);
 629                 BE_TIMER_POP(t_finish);
 630
 631                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 632
 633                 /* check schedule and register allocation */
 634                 BE_TIMER_PUSH(t_verify);
 635                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 636                         //irg_verify(irg, VRFY_ENFORCE_SSA);
 637                         be_check_dominance(irg);
 638                         be_verify_out_edges(irg);
 639                         be_verify_schedule(irg);
 640                         be_verify_register_allocation(env.arch_env, irg);
 641                 }
 642                 else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 643                         //assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 644                         assert(be_verify_out_edges(irg));
 645                         assert(be_check_dominance(irg) && "Dominance verification failed");
 646                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 647                         assert(be_verify_register_allocation(env.arch_env, irg)
 648                                && "register allocation verification failed");
 649                 }
 650                 BE_TIMER_POP(t_verify);
 651
 652                 /* emit assembler code */
 653                 BE_TIMER_PUSH(t_emit);
 654                 arch_code_generator_done(birg->cg);
 655                 BE_TIMER_POP(t_emit);
 656
 657                 dump(DUMP_FINAL, irg, "-end", dump_ir_extblock_graph_sched);
 658
 659                 BE_TIMER_PUSH(t_abi);
 660                 be_abi_free(birg->abi);
 661                 BE_TIMER_POP(t_abi);
 662
 663                 be_do_stat_nodes(irg, "07 Final");
 664                 restore_optimization_state(&state);
 665
 666                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 667                 BE_TIMER_POP(t_other);
 668
 669 #define LC_EMIT(timer)    printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0)
 670 #define LC_EMIT_RA(timer) printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0)
 671                 BE_TIMER_ONLY(
 672                         printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 673                         printf("# nodes at begin:  %u\n", num_nodes_b);
 674                         printf("# nodes before ra: %u\n", num_nodes_r);
 675                         printf("# nodes at end:    %u\n\n", num_nodes_a);
 676                         LC_EMIT(t_abi);
 677                         LC_EMIT(t_codegen);
 678                         LC_EMIT(t_sched);
 679                         LC_EMIT(t_constr);
 680                         LC_EMIT(t_regalloc);
 681                         LC_EMIT_RA(ra_timer->t_prolog);
 682                         LC_EMIT_RA(ra_timer->t_live);
 683                         LC_EMIT_RA(ra_timer->t_spill);
 684                         LC_EMIT_RA(ra_timer->t_spillslots);
 685                         LC_EMIT_RA(ra_timer->t_color);
 686                         LC_EMIT_RA(ra_timer->t_ifg);
 687                         LC_EMIT_RA(ra_timer->t_copymin);
 688                         LC_EMIT_RA(ra_timer->t_ssa);
 689                         LC_EMIT_RA(ra_timer->t_epilog);
 690                         LC_EMIT_RA(ra_timer->t_verify);
 691                         LC_EMIT_RA(ra_timer->t_other);
 692                         LC_EMIT(t_finish);
 693                         LC_EMIT(t_emit);
 694                         LC_EMIT(t_verify);
 695                         LC_EMIT(t_other);
 696                 );
 697 #undef LC_EMIT_RA
 698 #undef LC_EMIT
 699
 700                 free_execfreq(birg->execfreqs);
 701
 702         /* switched off due to statistics (statistic module needs all irgs) */
 703                 if (! stat_is_active())
 704                         free_ir_graph(irg);
 705         }
 706         be_profile_free();
 707         be_done_env(&env);
 708
 709 #undef BE_TIMER_POP
 710 #undef BE_TIMER_PUSH
 711 #undef BE_TIMER_ONLY
 712 }
 713
 714 /* Main interface to the frontend. */
 715 void be_main(FILE *file_handle, const char *asm_file_name)
 716 {
 717 #ifdef WITH_LIBCORE
 718         lc_timer_t *t = NULL;
 719 #endif /* WITH_LIBCORE */
 720
 721 #ifdef WITH_LIBCORE
 722         /* The user specified another config file to read. do that now. */
 723         if(strlen(config_file) > 0) {
 724                 FILE *f;
 725
 726                 if((f = fopen(config_file, "rt")) != NULL) {
 727                         lc_opt_from_file(config_file, f, NULL);
 728                         fclose(f);
 729                 }
 730         }
 731
 732         if (be_options.timing == BE_TIME_ON) {
 733                 t = lc_timer_register("bemain", "measure complete bemain loop");
 734
 735                 if (lc_timer_enter_high_priority()) {
 736                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 737                 }
 738
 739                 lc_timer_reset_and_start(t);
 740         }
 741 #endif /* WITH_LIBCORE */
 742
 743         /* never build code for pseudo irgs */
 744         set_visit_pseudo_irgs(0);
 745
 746         be_node_init();
 747         be_main_loop(file_handle, asm_file_name);
 748
 749 #ifdef WITH_LIBCORE
 750         if (be_options.timing == BE_TIME_ON) {
 751                 lc_timer_stop(t);
 752                 lc_timer_leave_high_priority();
 753                 printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 754         }
 755 #endif /* WITH_LIBCORE */
 756 }
 757
 758 /** The debug info retriever function. */
 759 static retrieve_dbg_func retrieve_dbg = NULL;
 760
 761 /* Sets a debug info retriever. */
 762 void be_set_debug_retrieve(retrieve_dbg_func func) {
 763         retrieve_dbg = func;
 764 }
 765
 766 /* Retrieve the debug info. */
 767 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 768         if (retrieve_dbg)
 769                 return retrieve_dbg(dbg, line);
 770         *line = 0;
 771         return NULL;
 772 }
 773
 774 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 775 {
 776         if(bs == NULL)
 777                 bs = bitset_alloca(cls->n_regs);
 778         else
 779                 bitset_clear_all(bs);
 780
 781         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 782         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 783         bitset_flip_all(bs);
 784         be_abi_put_ignore_regs(birg->abi, cls, bs);
 785         return bitset_popcnt(bs);
 786
 787 }