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 "irprintf.h"
  34 #include "return.h"
  35 #include "firmstat.h"
  36 #include "cfopt.h"
  37 #include "execfreq.h"
  38
  39 #include "bearch.h"
  40 #include "firm/bearch_firm.h"
  41 #include "ia32/bearch_ia32.h"
  42 #include "arm/bearch_arm.h"
  43 #include "ppc32/bearch_ppc32.h"
  44 #include "mips/bearch_mips.h"
  45
  46 #include "be_t.h"
  47 #include "benumb_t.h"
  48 #include "beutil.h"
  49 #include "benode_t.h"
  50 #include "beirgmod.h"
  51 #include "besched_t.h"
  52 #include "belistsched.h"
  53 #include "belive_t.h"
  54 #include "bespillbelady.h"
  55 #include "bera.h"
  56 #include "beraextern.h"
  57 #include "bechordal_t.h"
  58 #include "beifg.h"
  59 #include "beifg_impl.h"
  60 #include "becopyopt.h"
  61 #include "becopystat.h"
  62 #include "bessadestr.h"
  63 #include "beabi.h"
  64 #include "belower.h"
  65 #include "beschedmris.h"
  66 #include "bestat.h"
  67 #include "beverify.h"
  68 #include "beprofile.h"
  69 #include "beblocksched.h"
  70 #include "be_dbgout.h"
  71
  72 #ifdef WITH_ILP
  73 #include "beilpsched.h"
  74 #endif /* WITH_ILP */
  75
  76 /* options visible for anyone */
  77 static be_options_t be_options = {
  78         DUMP_NONE,                         /* dump flags */
  79         BE_TIME_OFF,                       /* no timing */
  80         0,                                 /* no opt profile */
  81         1,                                 /* try to omit frame pointer */
  82         0,                                 /* always stabs debugging output */
  83         BE_VRFY_WARN,                      /* verification level: warn */
  84         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  85         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  86         "cplex"                            /* ilp solver */
  87 };
  88
  89 /* config file. */
  90 static char config_file[256] = { 0 };
  91
  92 /* register allocator to use. */
  93 static const be_ra_t *ra = &be_ra_chordal_allocator;
  94
  95 /* back end instruction set architecture to use */
  96 static const arch_isa_if_t *isa_if = &ia32_isa_if;
  97
  98 #ifdef WITH_LIBCORE
  99
 100 static lc_opt_entry_t *be_grp_root = NULL;
 101
 102 /* possible dumping options */
 103 static const lc_opt_enum_mask_items_t dump_items[] = {
 104         { "none",       DUMP_NONE },
 105         { "initial",    DUMP_INITIAL },
 106         { "abi",        DUMP_ABI    },
 107         { "sched",      DUMP_SCHED  },
 108         { "prepared",   DUMP_PREPARED },
 109         { "regalloc",   DUMP_RA },
 110         { "final",      DUMP_FINAL },
 111         { "be",         DUMP_BE },
 112         { "all",        2 * DUMP_BE - 1 },
 113         { NULL,         0 }
 114 };
 115
 116 /* register allocators */
 117 static const lc_opt_enum_const_ptr_items_t ra_items[] = {
 118         { "chordal",  &be_ra_chordal_allocator },
 119         { "external", &be_ra_external_allocator },
 120         { NULL,      NULL }
 121 };
 122
 123 /* instruction set architectures. */
 124 static const lc_opt_enum_const_ptr_items_t isa_items[] = {
 125         { "ia32",    &ia32_isa_if },
 126 #if 0
 127         { "arm",     &arm_isa_if },
 128         { "ppc32",   &ppc32_isa_if },
 129         { "mips",    &mips_isa_if },
 130 #endif
 131         { NULL,      NULL }
 132 };
 133
 134 /* verify options. */
 135 static const lc_opt_enum_int_items_t vrfy_items[] = {
 136         { "off",    BE_VRFY_OFF    },
 137         { "warn",   BE_VRFY_WARN   },
 138         { "assert", BE_VRFY_ASSERT },
 139         { NULL,     0 }
 140 };
 141
 142 /* scheduling options. */
 143 static const lc_opt_enum_int_items_t sched_items[] = {
 144         { "list", BE_SCHED_LIST },
 145 #ifdef WITH_ILP
 146         { "ilp",  BE_SCHED_ILP  },
 147 #endif /* WITH_ILP */
 148         { NULL,   0 }
 149 };
 150
 151 static lc_opt_enum_mask_var_t dump_var = {
 152         &be_options.dump_flags, dump_items
 153 };
 154
 155 static lc_opt_enum_const_ptr_var_t ra_var = {
 156         (const void **) &ra, ra_items
 157 };
 158
 159 static lc_opt_enum_const_ptr_var_t isa_var = {
 160         (const void **) &isa_if, isa_items
 161 };
 162
 163 static lc_opt_enum_int_var_t vrfy_var = {
 164         &be_options.vrfy_option, vrfy_items
 165 };
 166
 167 static lc_opt_enum_int_var_t sched_var = {
 168         &be_options.scheduler, sched_items
 169 };
 170
 171 static const lc_opt_table_entry_t be_main_options[] = {
 172         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
 173         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
 174         LC_OPT_ENT_ENUM_PTR ("ra",       "register allocator",                                  &ra_var),
 175         LC_OPT_ENT_ENUM_PTR ("isa",      "the instruction set architecture",                    &isa_var),
 176         LC_OPT_ENT_NEGBOOL  ("noomitfp", "do not omit frame pointer",                           &be_options.omit_fp),
 177         LC_OPT_ENT_BOOL     ("stabs",    "enable stabs debug support",                          &be_options.stabs_debug_support),
 178         LC_OPT_ENT_ENUM_PTR ("vrfy",     "verify the backend irg",                              &vrfy_var),
 179         LC_OPT_ENT_BOOL     ("time",     "get backend timing statistics",                       &be_options.timing),
 180         LC_OPT_ENT_BOOL     ("profile",  "instrument the code for execution count profiling",   &be_options.opt_profile),
 181         LC_OPT_ENT_ENUM_PTR ("sched",    "select a scheduler",                                  &sched_var),
 182         LC_OPT_ENT_STR      ("statfile", "append statistics to file statfile", &be_options.stat_file_name, sizeof(be_options.stat_file_name)),
 183
 184 #ifdef WITH_ILP
 185         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 186         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 187 #endif /* WITH_ILP */
 188         { NULL }
 189 };
 190
 191 #endif /* WITH_LIBCORE */
 192
 193 void be_opt_register(void)
 194 {
 195 #ifdef WITH_LIBCORE
 196         int i;
 197         lc_opt_entry_t *be_grp_ra;
 198         static int run_once = 0;
 199
 200         if (! run_once) {
 201                 run_once     = 1;
 202                 be_grp_root  = lc_opt_get_grp(firm_opt_get_root(), "be");
 203                 be_grp_ra    = lc_opt_get_grp(be_grp_root, "ra");
 204
 205                 lc_opt_add_table(be_grp_root, be_main_options);
 206
 207                 /* register allocator options */
 208                 for(i = 0; ra_items[i].name != NULL; ++i) {
 209                         const be_ra_t *ra = ra_items[i].value;
 210                         ra->register_options(be_grp_ra);
 211                 }
 212
 213                 /* register isa options */
 214                 for(i = 0; isa_items[i].name != NULL; ++i) {
 215                         const arch_isa_if_t *isa = isa_items[i].value;
 216                         isa->register_options(be_grp_root);
 217                 }
 218
 219                 /* scheduler register options */
 220                 list_sched_register_options(be_grp_root);
 221
 222                 be_block_schedule_register_options(be_grp_root);
 223         }
 224 #endif /* WITH_LIBCORE */
 225 }
 226
 227 /* Parse one argument. */
 228 int be_parse_arg(const char *arg) {
 229 #ifdef WITH_LIBCORE
 230         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 231                 lc_opt_print_help(be_grp_root, stdout);
 232                 return -1;
 233         }
 234         return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL);
 235 #else
 236         return 0;
 237 #endif /* WITH_LIBCORE */
 238 }
 239
 240 /** The be parameters returned by default, all off. */
 241 const static backend_params be_params = {
 242         NULL,
 243         NULL,
 244         0,
 245         NULL,
 246 };
 247
 248 /* Perform schedule verification if requested. */
 249 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) {
 250         if (vrfy_opt == BE_VRFY_WARN) {
 251                 be_verify_schedule(irg);
 252         }
 253         else if (vrfy_opt == BE_VRFY_ASSERT) {
 254                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 255         }
 256 }
 257
 258 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 259 const backend_params *be_init(void)
 260 {
 261         be_opt_register();
 262
 263         be_sched_init();
 264         be_numbering_init();
 265         be_copy_opt_init();
 266         copystat_init();
 267         phi_class_init();
 268
 269         if (isa_if->get_params)
 270                 return isa_if->get_params();
 271         return &be_params;
 272 }
 273
 274 /**
 275  * Initializes the main environment for the backend.
 276  *
 277  * @param env          an empty environment
 278  * @param file_handle  the file handle where the output will be written to
 279  */
 280 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 281 {
 282         memset(env, 0, sizeof(*env));
 283         obstack_init(&env->obst);
 284         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 285         env->options  = &be_options;
 286         FIRM_DBG_REGISTER(env->dbg, "be.main");
 287
 288         arch_env_init(env->arch_env, isa_if, file_handle, env);
 289
 290         /* Register the irn handler of the architecture */
 291         if (arch_isa_get_irn_handler(env->arch_env->isa))
 292                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 293
 294         /*
 295          * Register the node handler of the back end infrastructure.
 296          * This irn handler takes care of the platform independent
 297          * spill, reload and perm nodes.
 298          */
 299         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 300         env->phi_handler = be_phi_handler_new(env->arch_env);
 301         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 302
 303         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 304         return env;
 305 }
 306
 307 static void be_done_env(be_main_env_t *env)
 308 {
 309         env->arch_env->isa->impl->done(env->arch_env->isa);
 310         be_dbg_close(env->db_handle);
 311         be_phi_handler_free(env->phi_handler);
 312         obstack_free(&env->obst, NULL);
 313 }
 314
 315 /**
 316  * A wrapper around a firm dumper. Dumps only, if
 317  * flags are enabled.
 318  *
 319  * @param mask    a bitmask containing the reason what will be dumped
 320  * @param irg     the IR graph to dump
 321  * @param suffix  the suffix for the dumper
 322  * @param dumper  the dumper to be called
 323  */
 324 static void dump(int mask, ir_graph *irg, const char *suffix,
 325                  void (*dumper)(ir_graph *, const char *))
 326 {
 327         if(be_options.dump_flags & mask)
 328                 be_dump(irg, suffix, dumper);
 329 }
 330
 331 /**
 332  * Prepare a backend graph for code generation and initialize its birg
 333  */
 334 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 335 {
 336         memset(birg, 0, sizeof(*birg));
 337         birg->irg = irg;
 338         birg->main_env = env;
 339
 340         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 341         edges_activate_kind(irg, EDGE_KIND_DEP);
 342
 343         DBG((env->dbg, LEVEL_2, "====> IRG: %F\n", irg));
 344         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 345
 346         be_stat_init_irg(env->arch_env, irg);
 347         be_do_stat_nodes(irg, "01 Begin");
 348
 349         /* set the current graph (this is important for several firm functions) */
 350         current_ir_graph = irg;
 351
 352         /* Normalize proj nodes. */
 353         normalize_proj_nodes(irg);
 354
 355         /* Make just one return node. */
 356         normalize_one_return(irg);
 357
 358         /* Remove critical edges */
 359         remove_critical_cf_edges(irg);
 360
 361         /* Compute the dominance information. */
 362         free_dom(irg);
 363         compute_doms(irg);
 364
 365         /* Ensure, that the ir_edges are computed. */
 366         edges_assure(irg);
 367
 368         /* check, if the dominance property is fulfilled. */
 369         be_check_dominance(irg);
 370
 371         /* reset the phi handler. */
 372         be_phi_handler_reset(env->phi_handler);
 373 }
 374
 375 #ifdef WITH_LIBCORE
 376
 377 #define BE_TIMER_PUSH(timer)                                                        \
 378         if (be_options.timing == BE_TIME_ON) {                                          \
 379                 int res = lc_timer_push(timer);                                             \
 380                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 381                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 382                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 383                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 384                                 lc_timer_get_name(timer));                                          \
 385         }
 386 #define BE_TIMER_POP(timer)                                                                    \
 387         if (be_options.timing == BE_TIME_ON) {                                                     \
 388                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 389                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 390                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 391                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 392                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 393                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 394                 timer = tmp;                                                                           \
 395         }
 396
 397 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 398
 399 #else
 400
 401 #define BE_TIMER_PUSH(timer)
 402 #define BE_TIMER_POP(timer)
 403 #define BE_TIMER_ONLY(code)
 404
 405 #endif /* WITH_LIBCORE */
 406
 407
 408 /**
 409  * The Firm backend main loop.
 410  * Do architecture specific lowering for all graphs
 411  * and call the architecture specific code generator.
 412  *
 413  * @param file_handle   the file handle the output will be written to
 414  * @param cup_name      name of the compilation unit
 415  */
 416 static void be_main_loop(FILE *file_handle, const char *cup_name)
 417 {
 418         int i;
 419         arch_isa_t *isa;
 420         be_main_env_t env;
 421         unsigned num_nodes_b = 0;
 422         unsigned num_nodes_a = 0;
 423         unsigned num_nodes_r = 0;
 424         char prof_filename[256];
 425         static const char suffix[] = ".prof";
 426         be_irg_t *birgs;
 427         unsigned num_birgs;
 428
 429         be_ra_timer_t *ra_timer;
 430
 431 #ifdef WITH_LIBCORE
 432         lc_timer_t *t_abi      = NULL;
 433         lc_timer_t *t_codegen  = NULL;
 434         lc_timer_t *t_sched    = NULL;
 435         lc_timer_t *t_constr   = NULL;
 436         lc_timer_t *t_regalloc = NULL;
 437         lc_timer_t *t_finish   = NULL;
 438         lc_timer_t *t_emit     = NULL;
 439         lc_timer_t *t_other    = NULL;
 440         lc_timer_t *t_verify   = NULL;
 441
 442         if (be_options.timing == BE_TIME_ON) {
 443                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 444                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 445                 t_sched    = lc_timer_register("sched",    "scheduling");
 446                 t_constr   = lc_timer_register("constr",   "assure constraints");
 447                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 448                 t_finish   = lc_timer_register("finish",   "graph finish");
 449                 t_emit     = lc_timer_register("emiter",   "code emiter");
 450                 t_verify   = lc_timer_register("verify",   "graph verification");
 451                 t_other    = lc_timer_register("other",    "other");
 452         }
 453 #endif /* WITH_LIBCORE */
 454
 455         be_init_env(&env, file_handle);
 456
 457         isa = arch_env_get_isa(env.arch_env);
 458
 459         be_dbg_so(env.db_handle, cup_name);
 460         be_dbg_types(env.db_handle);
 461
 462         /* we might need 1 birg more for instrumentation constructor */
 463         num_birgs = get_irp_n_irgs();
 464         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 465
 466         /* First: initialize all birgs */
 467         for(i = 0; i < get_irp_n_irgs(); ++i) {
 468                 ir_graph *irg = get_irp_irg(i);
 469
 470                 initialize_birg(&birgs[i], irg, &env);
 471         }
 472
 473         /*
 474                 Get the filename for the profiling data.
 475                 Beware: '\0' is already included in sizeof(suffix)
 476         */
 477         memset(prof_filename, 0, sizeof(prof_filename));
 478         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 479         strcat(prof_filename, suffix);
 480
 481         /*
 482                 Next: Either instruments all irgs with profiling code
 483                 or try to read in profile data for current translation unit.
 484         */
 485         if (be_options.opt_profile) {
 486                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 487                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 488                 num_birgs++;
 489                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 490         }
 491         else {
 492                 be_profile_read(prof_filename);
 493         }
 494
 495         /* For all graphs */
 496         for (i = 0; i < num_birgs; ++i) {
 497                 be_irg_t *birg = & birgs[i];
 498                 ir_graph *irg  = birg->irg;
 499                 optimization_state_t state;
 500                 const arch_code_generator_if_t *cg_if;
 501                 char irg_name[128];
 502
 503                 /* set the current graph (this is important for several firm functions) */
 504                 current_ir_graph = irg;
 505
 506                 if(be_stat_ev_is_active()) {
 507                         ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
 508                         be_stat_tags[STAT_TAG_IRG] = irg_name;
 509                         be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 510                 }
 511
 512                 /* stop and reset timers */
 513                 BE_TIMER_ONLY(
 514                         LC_STOP_AND_RESET_TIMER(t_abi);
 515                         LC_STOP_AND_RESET_TIMER(t_codegen);
 516                         LC_STOP_AND_RESET_TIMER(t_sched);
 517                         LC_STOP_AND_RESET_TIMER(t_constr);
 518                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 519                         LC_STOP_AND_RESET_TIMER(t_finish);
 520                         LC_STOP_AND_RESET_TIMER(t_emit);
 521                         LC_STOP_AND_RESET_TIMER(t_verify);
 522                         LC_STOP_AND_RESET_TIMER(t_other);
 523                 );
 524                 BE_TIMER_PUSH(t_other);   /* t_other */
 525
 526                 /**
 527                  * Create execution frequencies from profile data or estimate some
 528                  */
 529                 if (be_profile_has_data()) {
 530                         birg->execfreqs = be_create_execfreqs_from_profile(irg);
 531                 } else {
 532                         birg->execfreqs = compute_execfreq(irg, 10);
 533                 }
 534
 535                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 536
 537                 /* Get the code generator interface. */
 538                 cg_if = isa->impl->get_code_generator_if(isa);
 539
 540                 /* get a code generator for this graph. */
 541                 birg->cg = cg_if->init(birg);
 542
 543                 /* some transformations need to be done before abi introduce */
 544                 arch_code_generator_before_abi(birg->cg);
 545
 546                 /* reset the phi handler. */
 547                 be_phi_handler_reset(env.phi_handler);
 548
 549                 /* implement the ABI conventions. */
 550                 BE_TIMER_PUSH(t_abi);
 551                 birg->abi = be_abi_introduce(birg);
 552                 BE_TIMER_POP(t_abi);
 553
 554                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 555                 be_do_stat_nodes(irg, "02 Abi");
 556
 557                 /* generate code */
 558                 BE_TIMER_PUSH(t_codegen);
 559                 arch_code_generator_prepare_graph(birg->cg);
 560                 BE_TIMER_POP(t_codegen);
 561
 562                 be_do_stat_nodes(irg, "03 Prepare");
 563
 564                 /*
 565                         Since the code generator made a lot of new nodes and skipped
 566                         a lot of old ones, we should do dead node elimination here.
 567                         Note that this requires disabling the edges here.
 568                 */
 569                 edges_deactivate(irg);
 570                 //dead_node_elimination(irg);
 571                 edges_activate(irg);
 572
 573                 /* Compute loop nesting information (for weighting copies) */
 574                 construct_cf_backedges(irg);
 575                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 576                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 577
 578                 /* let backend prepare scheduling */
 579                 BE_TIMER_PUSH(t_codegen);
 580                 arch_code_generator_before_sched(birg->cg);
 581                 BE_TIMER_POP(t_codegen);
 582
 583                 /* schedule the irg */
 584                 BE_TIMER_PUSH(t_sched);
 585                 switch (be_options.scheduler) {
 586                         default:
 587                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 588                         case BE_SCHED_LIST:
 589                                 list_sched(birg, &be_options);
 590                                 break;
 591 #ifdef WITH_ILP
 592                         case BE_SCHED_ILP:
 593                                 be_ilp_sched(birg);
 594                                 fprintf(stderr, "Warning: ILP scheduler not yet fully implemented, falling back to list scheduler.\n");
 595                                 list_sched(birg, &be_options);
 596                                 break;
 597 #endif /* WITH_ILP */
 598                 };
 599                 BE_TIMER_POP(t_sched);
 600
 601                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 602
 603                 /* check schedule */
 604                 BE_TIMER_PUSH(t_verify);
 605                 be_sched_vrfy(irg, be_options.vrfy_option);
 606                 BE_TIMER_POP(t_verify);
 607
 608                 be_do_stat_nodes(irg, "04 Schedule");
 609
 610                 /* introduce patterns to assure constraints */
 611                 BE_TIMER_PUSH(t_constr);
 612                 /* we switch off optimizations here, because they might cause trouble */
 613                 save_optimization_state(&state);
 614                 set_optimize(0);
 615                 set_opt_normalize(0);
 616
 617                 /* add Keeps for should_be_different constrained nodes  */
 618                 /* beware: needs schedule due to usage of be_ssa_constr */
 619                 assure_constraints(birg);
 620                 BE_TIMER_POP(t_constr);
 621
 622                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 623                 be_do_stat_nodes(irg, "05 Constraints");
 624
 625                 /* connect all stack modifying nodes together (see beabi.c) */
 626                 BE_TIMER_PUSH(t_abi);
 627                 be_abi_fix_stack_nodes(birg->abi, NULL);
 628                 BE_TIMER_POP(t_abi);
 629
 630                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 631
 632                 /* check schedule */
 633                 BE_TIMER_PUSH(t_verify);
 634                 be_sched_vrfy(irg, be_options.vrfy_option);
 635                 BE_TIMER_POP(t_verify);
 636
 637                 /* do some statistics */
 638                 be_do_stat_reg_pressure(birg);
 639
 640                 /* stuff needs to be done after scheduling but before register allocation */
 641                 BE_TIMER_PUSH(t_codegen);
 642                 arch_code_generator_before_ra(birg->cg);
 643                 BE_TIMER_POP(t_codegen);
 644
 645                 /* Do register allocation */
 646                 BE_TIMER_PUSH(t_regalloc);
 647                 ra_timer = ra->allocate(birg);
 648                 BE_TIMER_POP(t_regalloc);
 649
 650                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 651                 be_do_stat_nodes(irg, "06 Register Allocation");
 652
 653                 /* let the code generator prepare the graph for emitter */
 654                 BE_TIMER_PUSH(t_finish);
 655                 arch_code_generator_after_ra(birg->cg);
 656                 BE_TIMER_POP(t_finish);
 657
 658                 /* fix stack offsets */
 659                 BE_TIMER_PUSH(t_abi);
 660                 be_abi_fix_stack_nodes(birg->abi, NULL);
 661                 be_remove_dead_nodes_from_schedule(irg);
 662                 be_abi_fix_stack_bias(birg->abi);
 663                 BE_TIMER_POP(t_abi);
 664
 665                 BE_TIMER_PUSH(t_finish);
 666                 arch_code_generator_finish(birg->cg);
 667                 BE_TIMER_POP(t_finish);
 668
 669                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 670
 671                 /* check schedule and register allocation */
 672                 BE_TIMER_PUSH(t_verify);
 673                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 674                         //irg_verify(irg, VRFY_ENFORCE_SSA);
 675                         be_check_dominance(irg);
 676                         be_verify_out_edges(irg);
 677                         be_verify_schedule(irg);
 678                         be_verify_register_allocation(env.arch_env, irg);
 679                 }
 680                 else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 681                         //assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 682                         assert(be_verify_out_edges(irg));
 683                         assert(be_check_dominance(irg) && "Dominance verification failed");
 684                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 685                         assert(be_verify_register_allocation(env.arch_env, irg)
 686                                && "register allocation verification failed");
 687                 }
 688                 BE_TIMER_POP(t_verify);
 689
 690                 /* emit assembler code */
 691                 BE_TIMER_PUSH(t_emit);
 692                 arch_code_generator_done(birg->cg);
 693                 BE_TIMER_POP(t_emit);
 694
 695                 dump(DUMP_FINAL, irg, "-end", dump_ir_extblock_graph_sched);
 696
 697                 BE_TIMER_PUSH(t_abi);
 698                 be_abi_free(birg->abi);
 699                 BE_TIMER_POP(t_abi);
 700
 701                 be_do_stat_nodes(irg, "07 Final");
 702                 restore_optimization_state(&state);
 703
 704                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 705                 BE_TIMER_POP(t_other);
 706
 707 #define LC_EMIT(timer)  \
 708         if(!be_stat_ev_is_active()) { \
 709                 printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 710         } else { \
 711                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 712         }
 713 #define LC_EMIT_RA(timer) \
 714         if(!be_stat_ev_is_active()) { \
 715                 printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 716         } else { \
 717                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 718         }
 719                 BE_TIMER_ONLY(
 720                         if(!be_stat_ev_is_active()) {
 721                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 722                                 printf("# nodes at begin:  %u\n", num_nodes_b);
 723                                 printf("# nodes before ra: %u\n", num_nodes_r);
 724                                 printf("# nodes at end:    %u\n\n", num_nodes_a);
 725                         }
 726                         LC_EMIT(t_abi);
 727                         LC_EMIT(t_codegen);
 728                         LC_EMIT(t_sched);
 729                         LC_EMIT(t_constr);
 730                         LC_EMIT(t_regalloc);
 731                         LC_EMIT_RA(ra_timer->t_prolog);
 732                         LC_EMIT_RA(ra_timer->t_live);
 733                         LC_EMIT_RA(ra_timer->t_spill);
 734                         LC_EMIT_RA(ra_timer->t_spillslots);
 735                         LC_EMIT_RA(ra_timer->t_color);
 736                         LC_EMIT_RA(ra_timer->t_ifg);
 737                         LC_EMIT_RA(ra_timer->t_copymin);
 738                         LC_EMIT_RA(ra_timer->t_ssa);
 739                         LC_EMIT_RA(ra_timer->t_epilog);
 740                         LC_EMIT_RA(ra_timer->t_verify);
 741                         LC_EMIT_RA(ra_timer->t_other);
 742                         LC_EMIT(t_finish);
 743                         LC_EMIT(t_emit);
 744                         LC_EMIT(t_verify);
 745                         LC_EMIT(t_other);
 746                 );
 747 #undef LC_EMIT_RA
 748 #undef LC_EMIT
 749
 750                 free_execfreq(birg->execfreqs);
 751
 752         /* switched off due to statistics (statistic module needs all irgs) */
 753                 if (! stat_is_active())
 754                         free_ir_graph(irg);
 755
 756                 if(be_stat_ev_is_active()) {
 757                         be_stat_ev_pop();
 758                 }
 759         }
 760         be_profile_free();
 761         be_done_env(&env);
 762
 763 #undef BE_TIMER_POP
 764 #undef BE_TIMER_PUSH
 765 #undef BE_TIMER_ONLY
 766 }
 767
 768 /* Main interface to the frontend. */
 769 void be_main(FILE *file_handle, const char *cup_name)
 770 {
 771 #ifdef WITH_LIBCORE
 772         lc_timer_t *t = NULL;
 773
 774         /* The user specified another config file to read. do that now. */
 775         if(strlen(config_file) > 0) {
 776                 FILE *f;
 777
 778                 if((f = fopen(config_file, "rt")) != NULL) {
 779                         lc_opt_from_file(config_file, f, NULL);
 780                         fclose(f);
 781                 }
 782         }
 783
 784         if (be_options.timing == BE_TIME_ON) {
 785                 t = lc_timer_register("bemain", "measure complete bemain loop");
 786
 787                 if (lc_timer_enter_high_priority()) {
 788                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 789                 }
 790
 791                 lc_timer_reset_and_start(t);
 792         }
 793
 794         be_init_stat_file(be_options.stat_file_name, cup_name);
 795 #endif /* WITH_LIBCORE */
 796
 797         /* never build code for pseudo irgs */
 798         set_visit_pseudo_irgs(0);
 799
 800         be_node_init();
 801
 802         be_main_loop(file_handle, cup_name);
 803
 804 #ifdef WITH_LIBCORE
 805         if (be_options.timing == BE_TIME_ON) {
 806                 lc_timer_stop(t);
 807                 lc_timer_leave_high_priority();
 808                 if(be_stat_ev_is_active()) {
 809                         be_stat_ev_l("backend_time", lc_timer_elapsed_msec(t));
 810                 } else {
 811                         printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 812                 }
 813         }
 814
 815         be_close_stat_file();
 816 #endif /* WITH_LIBCORE */
 817 }
 818
 819 /** The debug info retriever function. */
 820 static retrieve_dbg_func retrieve_dbg = NULL;
 821
 822 /* Sets a debug info retriever. */
 823 void be_set_debug_retrieve(retrieve_dbg_func func) {
 824         retrieve_dbg = func;
 825 }
 826
 827 /* Retrieve the debug info. */
 828 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 829         if (retrieve_dbg)
 830                 return retrieve_dbg(dbg, line);
 831
 832         *line = 0;
 833         return NULL;
 834 }
 835
 836 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 837 {
 838         if(bs == NULL)
 839                 bs = bitset_alloca(cls->n_regs);
 840         else
 841                 bitset_clear_all(bs);
 842
 843         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 844         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 845         bitset_flip_all(bs);
 846         be_abi_put_ignore_regs(birg->abi, cls, bs);
 847
 848         return bitset_popcnt(bs);
 849 }