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