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