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 "be_dbgout.h"
  69
  70 /* options visible for anyone */
  71 static be_options_t be_options = {
  72         DUMP_NONE,                         /* dump flags */
  73         BE_TIME_OFF,                       /* no timing */
  74         BE_SCHED_SELECT_HEUR,              /* mueller heuristic selector */
  75         0,                                 /* no opt profile */
  76         0,                                 /* disable mris */
  77         1,                                 /* try to omit frame pointer */
  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 /* schedule selector options. */
 137 static const lc_opt_enum_int_items_t sched_select_items[] = {
 138         { "trivial",  BE_SCHED_SELECT_TRIVIAL  },
 139         { "random",   BE_SCHED_SELECT_RANDOM },
 140         { "regpress", BE_SCHED_SELECT_REGPRESS },
 141         { "muchnik",  BE_SCHED_SELECT_MUCHNIK  },
 142         { "heur",     BE_SCHED_SELECT_HEUR     },
 143         { "hmuchnik", BE_SCHED_SELECT_HMUCHNIK },
 144         { NULL,     0 }
 145 };
 146
 147 static lc_opt_enum_mask_var_t dump_var = {
 148         &be_options.dump_flags, dump_items
 149 };
 150
 151 static lc_opt_enum_const_ptr_var_t ra_var = {
 152         (const void **) &ra, ra_items
 153 };
 154
 155 static lc_opt_enum_const_ptr_var_t isa_var = {
 156         (const void **) &isa_if, isa_items
 157 };
 158
 159 static lc_opt_enum_int_var_t vrfy_var = {
 160         &be_options.vrfy_option, vrfy_items
 161 };
 162
 163 static lc_opt_enum_int_var_t sched_select_var = {
 164         &be_options.sched_select, sched_select_items
 165 };
 166
 167 static const lc_opt_table_entry_t be_main_options[] = {
 168         LC_OPT_ENT_STR      ("config",       "read another config file containing backend options",                 config_file, sizeof(config_file)),
 169         LC_OPT_ENT_ENUM_MASK("dump",         "dump irg on several occasions",                                       &dump_var),
 170         LC_OPT_ENT_ENUM_PTR ("ra",           "register allocator",                                                  &ra_var),
 171         LC_OPT_ENT_ENUM_PTR ("isa",          "the instruction set architecture",                                    &isa_var),
 172         LC_OPT_ENT_NEGBOOL  ("noomitfp",     "do not omit frame pointer",                                           &be_options.omit_fp),
 173         LC_OPT_ENT_ENUM_PTR ("vrfy",         "verify the backend irg (off, warn, assert)",                          &vrfy_var),
 174         LC_OPT_ENT_BOOL     ("time",         "get backend timing statistics",                                       &be_options.timing),
 175         LC_OPT_ENT_BOOL     ("profile",      "instrument the code for execution count profiling",                   &be_options.opt_profile),
 176         LC_OPT_ENT_BOOL     ("sched.mris",   "enable mris schedule preparation",                                    &be_options.mris),
 177         LC_OPT_ENT_ENUM_PTR ("sched.select", "schedule node selector (trivial, regpress, muchnik, heur, hmuchnik)", &sched_select_var),
 178
 179 #ifdef WITH_ILP
 180         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 181         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 182 #endif /* WITH_ILP */
 183         { NULL }
 184 };
 185
 186 #endif /* WITH_LIBCORE */
 187
 188 void be_opt_register(void)
 189 {
 190 #ifdef WITH_LIBCORE
 191         int i;
 192         lc_opt_entry_t *be_grp_ra;
 193         static int run_once = 0;
 194
 195         if (! run_once) {
 196                 run_once    = 1;
 197                 be_grp_root = lc_opt_get_grp(firm_opt_get_root(), "be");
 198                 be_grp_ra   = lc_opt_get_grp(be_grp_root, "ra");
 199
 200                 lc_opt_add_table(be_grp_root, be_main_options);
 201
 202                 /* register allocator options */
 203                 for(i = 0; ra_items[i].name != NULL; ++i) {
 204                         const be_ra_t *ra = ra_items[i].value;
 205                         ra->register_options(be_grp_ra);
 206                 }
 207
 208                 /* register isa options */
 209                 for(i = 0; isa_items[i].name != NULL; ++i) {
 210                         const arch_isa_if_t *isa = isa_items[i].value;
 211                         isa->register_options(be_grp_root);
 212                 }
 213         }
 214 #endif /* WITH_LIBCORE */
 215 }
 216
 217 /* Parse one argument. */
 218 int be_parse_arg(const char *arg) {
 219 #ifdef WITH_LIBCORE
 220         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 221                 lc_opt_print_help(be_grp_root, stdout);
 222                 return -1;
 223         }
 224         return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL);
 225 #else
 226         return 0;
 227 #endif /* WITH_LIBCORE */
 228 }
 229
 230 /** The be parameters returned by default, all off. */
 231 const static backend_params be_params = {
 232         NULL,
 233         NULL,
 234         0,
 235         NULL,
 236 };
 237
 238 /* Perform schedule verification if requested. */
 239 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) {
 240         if (vrfy_opt == BE_VRFY_WARN) {
 241                 be_verify_schedule(irg);
 242         }
 243         else if (vrfy_opt == BE_VRFY_ASSERT) {
 244                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 245         }
 246 }
 247
 248 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 249 const backend_params *be_init(void)
 250 {
 251         be_opt_register();
 252
 253         be_sched_init();
 254         be_numbering_init();
 255         be_copy_opt_init();
 256         copystat_init();
 257         phi_class_init();
 258
 259         if (isa_if->get_params)
 260                 return isa_if->get_params();
 261         return &be_params;
 262 }
 263
 264 /**
 265  * Initializes the main environment for the backend.
 266  *
 267  * @param env          an empty environment
 268  * @param file_handle  the file handle where the output will be written to
 269  */
 270 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 271 {
 272         memset(env, 0, sizeof(*env));
 273         obstack_init(&env->obst);
 274         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 275         env->options  = &be_options;
 276         FIRM_DBG_REGISTER(env->dbg, "be.main");
 277
 278         arch_env_init(env->arch_env, isa_if, file_handle, env);
 279
 280         /* Register the irn handler of the architecture */
 281         if (arch_isa_get_irn_handler(env->arch_env->isa))
 282                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 283
 284         /*
 285          * Register the node handler of the back end infrastructure.
 286          * This irn handler takes care of the platform independent
 287          * spill, reload and perm nodes.
 288          */
 289         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 290         env->phi_handler = be_phi_handler_new(env->arch_env);
 291         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 292
 293         env->db_handle = be_stabs_open(file_handle);
 294         return env;
 295 }
 296
 297 static void be_done_env(be_main_env_t *env)
 298 {
 299         env->arch_env->isa->impl->done(env->arch_env->isa);
 300         be_dbg_close(env->db_handle);
 301         be_phi_handler_free(env->phi_handler);
 302         obstack_free(&env->obst, NULL);
 303 }
 304
 305 /**
 306  * A wrapper around a firm dumper. Dumps only, if
 307  * flags are enabled.
 308  *
 309  * @param mask    a bitmask containing the reason what will be dumped
 310  * @param irg     the IR graph to dump
 311  * @param suffix  the suffix for the dumper
 312  * @param dumper  the dumper to be called
 313  */
 314 static void dump(int mask, ir_graph *irg, const char *suffix,
 315                  void (*dumper)(ir_graph *, const char *))
 316 {
 317         if(be_options.dump_flags & mask)
 318                 be_dump(irg, suffix, dumper);
 319 }
 320
 321 /**
 322  * Prepare a backend graph for code generation and initialize its birg
 323  */
 324 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 325 {
 326         memset(birg, 0, sizeof(*birg));
 327         birg->irg = irg;
 328         birg->main_env = env;
 329
 330         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 331         edges_activate_kind(irg, EDGE_KIND_DEP);
 332
 333         DBG((env->dbg, LEVEL_2, "====> IRG: %F\n", irg));
 334         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 335
 336         be_stat_init_irg(env->arch_env, irg);
 337         be_do_stat_nodes(irg, "01 Begin");
 338
 339         /* set the current graph (this is important for several firm functions) */
 340         current_ir_graph = irg;
 341
 342         /* Normalize proj nodes. */
 343         normalize_proj_nodes(irg);
 344
 345         /* Make just one return node. */
 346         normalize_one_return(irg);
 347
 348         /* Remove critical edges */
 349         remove_critical_cf_edges(irg);
 350
 351         /* Compute the dominance information. */
 352         free_dom(irg);
 353         compute_doms(irg);
 354
 355         /* Ensure, that the ir_edges are computed. */
 356         edges_assure(irg);
 357
 358         /* check, if the dominance property is fulfilled. */
 359         be_check_dominance(irg);
 360
 361         /* reset the phi handler. */
 362         be_phi_handler_reset(env->phi_handler);
 363 }
 364
 365 #ifdef WITH_LIBCORE
 366
 367 #define BE_TIMER_PUSH(timer)                                                        \
 368         if (be_options.timing == BE_TIME_ON) {                                          \
 369                 int res = lc_timer_push(timer);                                             \
 370                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 371                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 372                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 373                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 374                                 lc_timer_get_name(timer));                                          \
 375         }
 376 #define BE_TIMER_POP(timer)                                                                    \
 377         if (be_options.timing == BE_TIME_ON) {                                                     \
 378                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 379                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 380                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 381                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 382                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 383                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 384                 timer = tmp;                                                                           \
 385         }
 386
 387 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 388
 389 #else
 390
 391 #define BE_TIMER_PUSH(timer)
 392 #define BE_TIMER_POP(timer)
 393 #define BE_TIMER_ONLY(code)
 394
 395 #endif /* WITH_LIBCORE */
 396
 397
 398 /**
 399  * The Firm backend main loop.
 400  * Do architecture specific lowering for all graphs
 401  * and call the architecture specific code generator.
 402  *
 403  * @param file_handle   the file handle the output will be written to
 404  * @param cup_name      name of the compilation unit
 405  */
 406 static void be_main_loop(FILE *file_handle, const char *cup_name)
 407 {
 408         int i;
 409         arch_isa_t *isa;
 410         be_main_env_t env;
 411         unsigned num_nodes_b = 0;
 412         unsigned num_nodes_a = 0;
 413         unsigned num_nodes_r = 0;
 414         char prof_filename[256];
 415         static const char suffix[] = ".prof";
 416         be_irg_t *birgs;
 417         unsigned num_birgs;
 418
 419 #ifdef WITH_LIBCORE
 420         lc_timer_t *t_abi      = NULL;
 421         lc_timer_t *t_codegen  = NULL;
 422         lc_timer_t *t_sched    = NULL;
 423         lc_timer_t *t_constr   = NULL;
 424         lc_timer_t *t_regalloc = NULL;
 425         lc_timer_t *t_finish   = NULL;
 426         lc_timer_t *t_emit     = NULL;
 427         lc_timer_t *t_other    = NULL;
 428         lc_timer_t *t_verify   = NULL;
 429         be_ra_timer_t *ra_timer;
 430
 431         if (be_options.timing == BE_TIME_ON) {
 432                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 433                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 434                 t_sched    = lc_timer_register("sched",    "scheduling");
 435                 t_constr   = lc_timer_register("constr",   "assure constraints");
 436                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 437                 t_finish   = lc_timer_register("finish",   "graph finish");
 438                 t_emit     = lc_timer_register("emiter",   "code emiter");
 439                 t_verify   = lc_timer_register("verify",   "graph verification");
 440                 t_other    = lc_timer_register("other",    "other");
 441         }
 442 #endif /* WITH_LIBCORE */
 443
 444         be_init_env(&env, file_handle);
 445
 446         isa = arch_env_get_isa(env.arch_env);
 447
 448         be_dbg_so(env.db_handle, cup_name);
 449         be_dbg_types(env.db_handle);
 450
 451         /* we might need 1 birg more for instrumentation constructor */
 452         num_birgs = get_irp_n_irgs();
 453         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 454
 455         /* First: initialize all birgs */
 456         for(i = 0; i < get_irp_n_irgs(); ++i) {
 457                 ir_graph *irg = get_irp_irg(i);
 458
 459                 initialize_birg(&birgs[i], irg, &env);
 460         }
 461
 462         /*
 463                 Get the filename for the profiling data.
 464                 Beware: '\0' is already included in sizeof(suffix)
 465         */
 466         memset(prof_filename, 0, sizeof(prof_filename));
 467         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 468         strcat(prof_filename, suffix);
 469
 470         /*
 471                 Next: Either instruments all irgs with profiling code
 472                 or try to read in profile data for current translation unit.
 473         */
 474         if (be_options.opt_profile) {
 475                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 476                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 477                 num_birgs++;
 478                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 479         }
 480         else {
 481                 be_profile_read(prof_filename);
 482         }
 483
 484         /* For all graphs */
 485         for (i = 0; i < num_birgs; ++i) {
 486                 be_irg_t *birg = & birgs[i];
 487                 ir_graph *irg  = birg->irg;
 488                 optimization_state_t state;
 489                 const arch_code_generator_if_t *cg_if;
 490
 491                 /* stop and reset timers */
 492                 BE_TIMER_ONLY(
 493                         LC_STOP_AND_RESET_TIMER(t_abi);
 494                         LC_STOP_AND_RESET_TIMER(t_codegen);
 495                         LC_STOP_AND_RESET_TIMER(t_sched);
 496                         LC_STOP_AND_RESET_TIMER(t_constr);
 497                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 498                         LC_STOP_AND_RESET_TIMER(t_finish);
 499                         LC_STOP_AND_RESET_TIMER(t_emit);
 500                         LC_STOP_AND_RESET_TIMER(t_verify);
 501                         LC_STOP_AND_RESET_TIMER(t_other);
 502                 );
 503                 BE_TIMER_PUSH(t_other);   /* t_other */
 504
 505                 /**
 506                  * Create execution frequencies from profile data or estimate some
 507                  */
 508                 if(be_profile_has_data()) {
 509                         birg->execfreqs = be_create_execfreqs_from_profile(irg);
 510                 } else {
 511                         birg->execfreqs = compute_execfreq(irg, 10);
 512                 }
 513
 514                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 515
 516                 /* Get the code generator interface. */
 517                 cg_if = isa->impl->get_code_generator_if(isa);
 518
 519                 /* get a code generator for this graph. */
 520                 birg->cg = cg_if->init(birg);
 521
 522                 /* some transformations need to be done before abi introduce */
 523                 arch_code_generator_before_abi(birg->cg);
 524
 525                 /* set the current graph (this is important for several firm functions) */
 526                 current_ir_graph = irg;
 527
 528                 /* reset the phi handler. */
 529                 be_phi_handler_reset(env.phi_handler);
 530
 531                 /* implement the ABI conventions. */
 532                 BE_TIMER_PUSH(t_abi);
 533                 birg->abi = be_abi_introduce(birg);
 534                 BE_TIMER_POP(t_abi);
 535
 536                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 537                 be_do_stat_nodes(irg, "02 Abi");
 538
 539                 /* generate code */
 540                 BE_TIMER_PUSH(t_codegen);
 541                 arch_code_generator_prepare_graph(birg->cg);
 542                 BE_TIMER_POP(t_codegen);
 543
 544                 be_do_stat_nodes(irg, "03 Prepare");
 545
 546                 /*
 547                         Since the code generator made a lot of new nodes and skipped
 548                         a lot of old ones, we should do dead node elimination here.
 549                         Note that this requires disabling the edges here.
 550                  */
 551                 edges_deactivate(irg);
 552                 //dead_node_elimination(irg);
 553                 edges_activate(irg);
 554
 555                 /* Compute loop nesting information (for weighting copies) */
 556                 construct_cf_backedges(irg);
 557                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 558                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 559
 560                 /* let backend prepare scheduling */
 561                 BE_TIMER_PUSH(t_codegen);
 562                 arch_code_generator_before_sched(birg->cg);
 563                 BE_TIMER_POP(t_codegen);
 564
 565                 /* schedule the irg */
 566                 BE_TIMER_PUSH(t_sched);
 567                 list_sched(birg, &be_options);
 568                 BE_TIMER_POP(t_sched);
 569
 570                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 571
 572                 /* check schedule */
 573                 BE_TIMER_PUSH(t_verify);
 574                 be_sched_vrfy(irg, be_options.vrfy_option);
 575                 BE_TIMER_POP(t_verify);
 576
 577                 be_do_stat_nodes(irg, "04 Schedule");
 578
 579                 /* introduce patterns to assure constraints */
 580                 BE_TIMER_PUSH(t_constr);
 581                 /* we switch off optimizations here, because they might cause trouble */
 582                 save_optimization_state(&state);
 583                 set_optimize(0);
 584                 set_opt_normalize(0);
 585
 586                 /* add Keeps for should_be_different constrained nodes  */
 587                 /* beware: needs schedule due to usage of be_ssa_constr */
 588                 assure_constraints(birg);
 589                 BE_TIMER_POP(t_constr);
 590
 591                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 592                 be_do_stat_nodes(irg, "05 Constraints");
 593
 594                 /* connect all stack modifying nodes together (see beabi.c) */
 595                 BE_TIMER_PUSH(t_abi);
 596                 be_abi_fix_stack_nodes(birg->abi, NULL);
 597                 BE_TIMER_POP(t_abi);
 598
 599                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 600
 601                 /* check schedule */
 602                 BE_TIMER_PUSH(t_verify);
 603                 be_sched_vrfy(irg, be_options.vrfy_option);
 604                 BE_TIMER_POP(t_verify);
 605
 606                 /* do some statistics */
 607                 be_do_stat_reg_pressure(birg);
 608
 609                 /* stuff needs to be done after scheduling but before register allocation */
 610                 BE_TIMER_PUSH(t_codegen);
 611                 arch_code_generator_before_ra(birg->cg);
 612                 BE_TIMER_POP(t_codegen);
 613
 614                 /* Do register allocation */
 615                 BE_TIMER_PUSH(t_regalloc);
 616                 ra_timer = ra->allocate(birg);
 617                 BE_TIMER_POP(t_regalloc);
 618
 619                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 620                 be_do_stat_nodes(irg, "06 Register Allocation");
 621
 622                 /* let the code generator prepare the graph for emitter */
 623                 BE_TIMER_PUSH(t_finish);
 624                 arch_code_generator_after_ra(birg->cg);
 625                 BE_TIMER_POP(t_finish);
 626
 627                 /* fix stack offsets */
 628                 BE_TIMER_PUSH(t_abi);
 629                 be_abi_fix_stack_nodes(birg->abi, NULL);
 630                 be_remove_dead_nodes_from_schedule(irg);
 631                 be_abi_fix_stack_bias(birg->abi);
 632                 BE_TIMER_POP(t_abi);
 633
 634                 BE_TIMER_PUSH(t_finish);
 635                 arch_code_generator_finish(birg->cg);
 636                 BE_TIMER_POP(t_finish);
 637
 638                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 639
 640                 /* check schedule and register allocation */
 641                 BE_TIMER_PUSH(t_verify);
 642                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 643                         //irg_verify(irg, VRFY_ENFORCE_SSA);
 644                         be_check_dominance(irg);
 645                         be_verify_out_edges(irg);
 646                         be_verify_schedule(irg);
 647                         be_verify_register_allocation(env.arch_env, irg);
 648                 }
 649                 else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 650                         //assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 651                         assert(be_verify_out_edges(irg));
 652                         assert(be_check_dominance(irg) && "Dominance verification failed");
 653                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 654                         assert(be_verify_register_allocation(env.arch_env, irg)
 655                                && "register allocation verification failed");
 656                 }
 657                 BE_TIMER_POP(t_verify);
 658
 659                 /* emit assembler code */
 660                 BE_TIMER_PUSH(t_emit);
 661                 arch_code_generator_done(birg->cg);
 662                 BE_TIMER_POP(t_emit);
 663
 664                 dump(DUMP_FINAL, irg, "-end", dump_ir_extblock_graph_sched);
 665
 666                 BE_TIMER_PUSH(t_abi);
 667                 be_abi_free(birg->abi);
 668                 BE_TIMER_POP(t_abi);
 669
 670                 be_do_stat_nodes(irg, "07 Final");
 671                 restore_optimization_state(&state);
 672
 673                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 674                 BE_TIMER_POP(t_other);
 675
 676 #define LC_EMIT(timer)    printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0)
 677 #define LC_EMIT_RA(timer) printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0)
 678                 BE_TIMER_ONLY(
 679                         printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 680                         printf("# nodes at begin:  %u\n", num_nodes_b);
 681                         printf("# nodes before ra: %u\n", num_nodes_r);
 682                         printf("# nodes at end:    %u\n\n", num_nodes_a);
 683                         LC_EMIT(t_abi);
 684                         LC_EMIT(t_codegen);
 685                         LC_EMIT(t_sched);
 686                         LC_EMIT(t_constr);
 687                         LC_EMIT(t_regalloc);
 688                         LC_EMIT_RA(ra_timer->t_prolog);
 689                         LC_EMIT_RA(ra_timer->t_live);
 690                         LC_EMIT_RA(ra_timer->t_spill);
 691                         LC_EMIT_RA(ra_timer->t_spillslots);
 692                         LC_EMIT_RA(ra_timer->t_color);
 693                         LC_EMIT_RA(ra_timer->t_ifg);
 694                         LC_EMIT_RA(ra_timer->t_copymin);
 695                         LC_EMIT_RA(ra_timer->t_ssa);
 696                         LC_EMIT_RA(ra_timer->t_epilog);
 697                         LC_EMIT_RA(ra_timer->t_verify);
 698                         LC_EMIT_RA(ra_timer->t_other);
 699                         LC_EMIT(t_finish);
 700                         LC_EMIT(t_emit);
 701                         LC_EMIT(t_verify);
 702                         LC_EMIT(t_other);
 703                 );
 704 #undef LC_EMIT_RA
 705 #undef LC_EMIT
 706
 707                 free_execfreq(birg->execfreqs);
 708
 709         /* switched off due to statistics (statistic module needs all irgs) */
 710                 if (! stat_is_active())
 711                         free_ir_graph(irg);
 712         }
 713         be_profile_free();
 714         be_done_env(&env);
 715
 716 #undef BE_TIMER_POP
 717 #undef BE_TIMER_PUSH
 718 #undef BE_TIMER_ONLY
 719 }
 720
 721 /* Main interface to the frontend. */
 722 void be_main(FILE *file_handle, const char *cup_name)
 723 {
 724 #ifdef WITH_LIBCORE
 725         lc_timer_t *t = NULL;
 726 #endif /* WITH_LIBCORE */
 727
 728 #ifdef WITH_LIBCORE
 729         /* The user specified another config file to read. do that now. */
 730         if(strlen(config_file) > 0) {
 731                 FILE *f;
 732
 733                 if((f = fopen(config_file, "rt")) != NULL) {
 734                         lc_opt_from_file(config_file, f, NULL);
 735                         fclose(f);
 736                 }
 737         }
 738
 739         if (be_options.timing == BE_TIME_ON) {
 740                 t = lc_timer_register("bemain", "measure complete bemain loop");
 741
 742                 if (lc_timer_enter_high_priority()) {
 743                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 744                 }
 745
 746                 lc_timer_reset_and_start(t);
 747         }
 748 #endif /* WITH_LIBCORE */
 749
 750         /* never build code for pseudo irgs */
 751         set_visit_pseudo_irgs(0);
 752
 753         be_node_init();
 754         be_main_loop(file_handle, cup_name);
 755
 756 #ifdef WITH_LIBCORE
 757         if (be_options.timing == BE_TIME_ON) {
 758                 lc_timer_stop(t);
 759                 lc_timer_leave_high_priority();
 760                 printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 761         }
 762 #endif /* WITH_LIBCORE */
 763 }
 764
 765 /** The debug info retriever function. */
 766 static retrieve_dbg_func retrieve_dbg = NULL;
 767
 768 /* Sets a debug info retriever. */
 769 void be_set_debug_retrieve(retrieve_dbg_func func) {
 770         retrieve_dbg = func;
 771 }
 772
 773 /* Retrieve the debug info. */
 774 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 775         if (retrieve_dbg)
 776                 return retrieve_dbg(dbg, line);
 777         *line = 0;
 778         return NULL;
 779 }
 780
 781 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 782 {
 783         if(bs == NULL)
 784                 bs = bitset_alloca(cls->n_regs);
 785         else
 786                 bitset_clear_all(bs);
 787
 788         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 789         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 790         bitset_flip_all(bs);
 791         be_abi_put_ignore_regs(birg->abi, cls, bs);
 792         return bitset_popcnt(bs);
 793
 794 }