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