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