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