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