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 // #include "sta/bearch_sta.h"
  46
  47 #include "be_t.h"
  48 #include "beutil.h"
  49 #include "benode_t.h"
  50 #include "beirgmod.h"
  51 #include "besched_t.h"
  52 #include "belistsched.h"
  53 #include "belive_t.h"
  54 #include "bespillbelady.h"
  55 #include "bera.h"
  56 #include "beraextern.h"
  57 #include "bechordal_t.h"
  58 #include "beifg.h"
  59 #include "beifg_impl.h"
  60 #include "becopyopt.h"
  61 #include "becopystat.h"
  62 #include "bessadestr.h"
  63 #include "beabi.h"
  64 #include "belower.h"
  65 #include "beschedmris.h"
  66 #include "bestat.h"
  67 #include "beverify.h"
  68 #include "beprofile.h"
  69 #include "beblocksched.h"
  70 #include "be_dbgout.h"
  71
  72 #ifdef WITH_ILP
  73 #include "beilpsched.h"
  74 #endif /* WITH_ILP */
  75
  76 /* options visible for anyone */
  77 static be_options_t be_options = {
  78         DUMP_NONE,                         /* dump flags */
  79         BE_TIME_OFF,                       /* no timing */
  80         0,                                 /* no opt profile */
  81         1,                                 /* try to omit frame pointer */
  82         0,                                 /* always stabs debugging output */
  83         BE_VRFY_WARN,                      /* verification level: warn */
  84         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  85         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  86         "cplex"                            /* ilp solver */
  87 };
  88
  89 /* config file. */
  90 static char config_file[256] = { 0 };
  91
  92 /* register allocator to use. */
  93 static const be_ra_t *ra = &be_ra_chordal_allocator;
  94
  95 /* back end instruction set architecture to use */
  96 static const arch_isa_if_t *isa_if = &ia32_isa_if;
  97
  98 #ifdef WITH_LIBCORE
  99
 100 static lc_opt_entry_t *be_grp_root = NULL;
 101
 102 /* possible dumping options */
 103 static const lc_opt_enum_mask_items_t dump_items[] = {
 104         { "none",       DUMP_NONE },
 105         { "initial",    DUMP_INITIAL },
 106         { "abi",        DUMP_ABI    },
 107         { "sched",      DUMP_SCHED  },
 108         { "prepared",   DUMP_PREPARED },
 109         { "regalloc",   DUMP_RA },
 110         { "final",      DUMP_FINAL },
 111         { "be",         DUMP_BE },
 112         { "all",        2 * DUMP_BE - 1 },
 113         { NULL,         0 }
 114 };
 115
 116 /* register allocators */
 117 static const lc_opt_enum_const_ptr_items_t ra_items[] = {
 118         { "chordal",  &be_ra_chordal_allocator },
 119         { "external", &be_ra_external_allocator },
 120         { NULL,      NULL }
 121 };
 122
 123 /* instruction set architectures. */
 124 static const lc_opt_enum_const_ptr_items_t isa_items[] = {
 125         { "ia32",    &ia32_isa_if },
 126 #if 0
 127         { "sta",     &sta_isa_if },
 128         { "arm",     &arm_isa_if },
 129         { "ppc32",   &ppc32_isa_if },
 130         { "mips",    &mips_isa_if },
 131 #endif
 132         { NULL,      NULL }
 133 };
 134
 135 /* verify options. */
 136 static const lc_opt_enum_int_items_t vrfy_items[] = {
 137         { "off",    BE_VRFY_OFF    },
 138         { "warn",   BE_VRFY_WARN   },
 139         { "assert", BE_VRFY_ASSERT },
 140         { NULL,     0 }
 141 };
 142
 143 /* scheduling options. */
 144 static const lc_opt_enum_int_items_t sched_items[] = {
 145         { "list", BE_SCHED_LIST },
 146 #ifdef WITH_ILP
 147         { "ilp",  BE_SCHED_ILP  },
 148 #endif /* WITH_ILP */
 149         { NULL,   0 }
 150 };
 151
 152 static lc_opt_enum_mask_var_t dump_var = {
 153         &be_options.dump_flags, dump_items
 154 };
 155
 156 static lc_opt_enum_const_ptr_var_t ra_var = {
 157         (const void **) &ra, ra_items
 158 };
 159
 160 static lc_opt_enum_const_ptr_var_t isa_var = {
 161         (const void **) &isa_if, isa_items
 162 };
 163
 164 static lc_opt_enum_int_var_t vrfy_var = {
 165         &be_options.vrfy_option, vrfy_items
 166 };
 167
 168 static lc_opt_enum_int_var_t sched_var = {
 169         &be_options.scheduler, sched_items
 170 };
 171
 172 static const lc_opt_table_entry_t be_main_options[] = {
 173         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
 174         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
 175         LC_OPT_ENT_ENUM_PTR ("ra",       "register allocator",                                  &ra_var),
 176         LC_OPT_ENT_ENUM_PTR ("isa",      "the instruction set architecture",                    &isa_var),
 177         LC_OPT_ENT_NEGBOOL  ("noomitfp", "do not omit frame pointer",                           &be_options.omit_fp),
 178         LC_OPT_ENT_BOOL     ("stabs",    "enable stabs debug support",                          &be_options.stabs_debug_support),
 179         LC_OPT_ENT_ENUM_PTR ("vrfy",     "verify the backend irg",                              &vrfy_var),
 180         LC_OPT_ENT_BOOL     ("time",     "get backend timing statistics",                       &be_options.timing),
 181         LC_OPT_ENT_BOOL     ("profile",  "instrument the code for execution count profiling",   &be_options.opt_profile),
 182         LC_OPT_ENT_ENUM_PTR ("sched",    "select a scheduler",                                  &sched_var),
 183         LC_OPT_ENT_STR      ("statfile", "append statistics to file statfile", &be_options.stat_file_name, sizeof(be_options.stat_file_name)),
 184
 185 #ifdef WITH_ILP
 186         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 187         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 188 #endif /* WITH_ILP */
 189         { NULL }
 190 };
 191
 192 #endif /* WITH_LIBCORE */
 193
 194 void be_opt_register(void)
 195 {
 196 #ifdef WITH_LIBCORE
 197         int i;
 198         lc_opt_entry_t *be_grp_ra;
 199         static int run_once = 0;
 200
 201         if (! run_once) {
 202                 run_once     = 1;
 203                 be_grp_root  = lc_opt_get_grp(firm_opt_get_root(), "be");
 204                 be_grp_ra    = lc_opt_get_grp(be_grp_root, "ra");
 205
 206                 lc_opt_add_table(be_grp_root, be_main_options);
 207
 208                 /* register allocator options */
 209                 for(i = 0; ra_items[i].name != NULL; ++i) {
 210                         const be_ra_t *ra = ra_items[i].value;
 211                         ra->register_options(be_grp_ra);
 212                 }
 213
 214                 /* register isa options */
 215                 for(i = 0; isa_items[i].name != NULL; ++i) {
 216                         const arch_isa_if_t *isa = isa_items[i].value;
 217                         isa->register_options(be_grp_root);
 218                 }
 219
 220                 /* list scheduler register options */
 221                 list_sched_register_options(be_grp_root);
 222
 223 #ifdef WITH_ILP
 224                 /* ilp scheduler register options */
 225                 ilpsched_register_options(be_grp_root);
 226 #endif /* WITH_ILP */
 227
 228                 be_block_schedule_register_options(be_grp_root);
 229         }
 230 #endif /* WITH_LIBCORE */
 231 }
 232
 233 /* Parse one argument. */
 234 int be_parse_arg(const char *arg) {
 235 #ifdef WITH_LIBCORE
 236         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 237                 lc_opt_print_help(be_grp_root, stdout);
 238                 return -1;
 239         }
 240         return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL);
 241 #else
 242         return 0;
 243 #endif /* WITH_LIBCORE */
 244 }
 245
 246 /** The be parameters returned by default, all off. */
 247 const static backend_params be_params = {
 248         NULL,
 249         NULL,
 250         0,
 251         NULL,
 252 };
 253
 254 /* Perform schedule verification if requested. */
 255 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) {
 256         if (vrfy_opt == BE_VRFY_WARN) {
 257                 be_verify_schedule(irg);
 258         }
 259         else if (vrfy_opt == BE_VRFY_ASSERT) {
 260                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 261         }
 262 }
 263
 264 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 265 const backend_params *be_init(void)
 266 {
 267         be_opt_register();
 268
 269         be_sched_init();
 270         be_copy_opt_init();
 271         copystat_init();
 272         phi_class_init();
 273
 274         if (isa_if->get_params)
 275                 return isa_if->get_params();
 276         return &be_params;
 277 }
 278
 279 /**
 280  * Initializes the main environment for the backend.
 281  *
 282  * @param env          an empty environment
 283  * @param file_handle  the file handle where the output will be written to
 284  */
 285 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 286 {
 287         memset(env, 0, sizeof(*env));
 288         obstack_init(&env->obst);
 289         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 290         env->options  = &be_options;
 291         FIRM_DBG_REGISTER(env->dbg, "be.main");
 292
 293         arch_env_init(env->arch_env, isa_if, file_handle, env);
 294
 295         /* Register the irn handler of the architecture */
 296         if (arch_isa_get_irn_handler(env->arch_env->isa))
 297                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 298
 299         /*
 300          * Register the node handler of the back end infrastructure.
 301          * This irn handler takes care of the platform independent
 302          * spill, reload and perm nodes.
 303          */
 304         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 305         env->phi_handler = be_phi_handler_new(env->arch_env);
 306         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 307
 308         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 309         return env;
 310 }
 311
 312 static void be_done_env(be_main_env_t *env)
 313 {
 314         env->arch_env->isa->impl->done(env->arch_env->isa);
 315         be_dbg_close(env->db_handle);
 316         be_phi_handler_free(env->phi_handler);
 317         obstack_free(&env->obst, NULL);
 318 }
 319
 320 /**
 321  * A wrapper around a firm dumper. Dumps only, if
 322  * flags are enabled.
 323  *
 324  * @param mask    a bitmask containing the reason what will be dumped
 325  * @param irg     the IR graph to dump
 326  * @param suffix  the suffix for the dumper
 327  * @param dumper  the dumper to be called
 328  */
 329 static void dump(int mask, ir_graph *irg, const char *suffix,
 330                  void (*dumper)(ir_graph *, const char *))
 331 {
 332         if(be_options.dump_flags & mask)
 333                 be_dump(irg, suffix, dumper);
 334 }
 335
 336 /**
 337  * Prepare a backend graph for code generation and initialize its birg
 338  */
 339 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 340 {
 341         memset(birg, 0, sizeof(*birg));
 342         birg->irg = irg;
 343         birg->main_env = env;
 344
 345         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 346         edges_activate_kind(irg, EDGE_KIND_DEP);
 347
 348         DBG((env->dbg, LEVEL_2, "====> IRG: %F\n", irg));
 349         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 350
 351         be_stat_init_irg(env->arch_env, irg);
 352         be_do_stat_nodes(irg, "01 Begin");
 353
 354         /* set the current graph (this is important for several firm functions) */
 355         current_ir_graph = irg;
 356
 357         /* Normalize proj nodes. */
 358         normalize_proj_nodes(irg);
 359
 360         /* Make just one return node. */
 361         normalize_one_return(irg);
 362
 363         /* Remove critical edges */
 364         remove_critical_cf_edges(irg);
 365
 366         /* Ensure, that the ir_edges are computed. */
 367         edges_assure(irg);
 368
 369         /* reset the phi handler. */
 370         be_phi_handler_reset(env->phi_handler);
 371 }
 372
 373 #ifdef WITH_LIBCORE
 374
 375 #define BE_TIMER_PUSH(timer)                                                        \
 376         if (be_options.timing == BE_TIME_ON) {                                          \
 377                 int res = lc_timer_push(timer);                                             \
 378                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 379                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 380                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 381                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 382                                 lc_timer_get_name(timer));                                          \
 383         }
 384 #define BE_TIMER_POP(timer)                                                                    \
 385         if (be_options.timing == BE_TIME_ON) {                                                     \
 386                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 387                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 388                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 389                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 390                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 391                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 392                 timer = tmp;                                                                           \
 393         }
 394
 395 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 396
 397 #else
 398
 399 #define BE_TIMER_PUSH(timer)
 400 #define BE_TIMER_POP(timer)
 401 #define BE_TIMER_ONLY(code)
 402
 403 #endif /* WITH_LIBCORE */
 404
 405
 406 /**
 407  * The Firm backend main loop.
 408  * Do architecture specific lowering for all graphs
 409  * and call the architecture specific code generator.
 410  *
 411  * @param file_handle   the file handle the output will be written to
 412  * @param cup_name      name of the compilation unit
 413  */
 414 static void be_main_loop(FILE *file_handle, const char *cup_name)
 415 {
 416         int i;
 417         arch_isa_t *isa;
 418         be_main_env_t env;
 419         unsigned num_nodes_b = 0;
 420         unsigned num_nodes_a = 0;
 421         unsigned num_nodes_r = 0;
 422         char prof_filename[256];
 423         static const char suffix[] = ".prof";
 424         be_irg_t *birgs;
 425         unsigned num_birgs;
 426
 427         be_ra_timer_t *ra_timer;
 428
 429 #ifdef WITH_LIBCORE
 430         lc_timer_t *t_abi      = NULL;
 431         lc_timer_t *t_codegen  = NULL;
 432         lc_timer_t *t_sched    = NULL;
 433         lc_timer_t *t_constr   = NULL;
 434         lc_timer_t *t_regalloc = NULL;
 435         lc_timer_t *t_finish   = NULL;
 436         lc_timer_t *t_emit     = NULL;
 437         lc_timer_t *t_other    = NULL;
 438         lc_timer_t *t_verify   = NULL;
 439
 440         if (be_options.timing == BE_TIME_ON) {
 441                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 442                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 443                 t_sched    = lc_timer_register("sched",    "scheduling");
 444                 t_constr   = lc_timer_register("constr",   "assure constraints");
 445                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 446                 t_finish   = lc_timer_register("finish",   "graph finish");
 447                 t_emit     = lc_timer_register("emiter",   "code emiter");
 448                 t_verify   = lc_timer_register("verify",   "graph verification");
 449                 t_other    = lc_timer_register("other",    "other");
 450         }
 451 #endif /* WITH_LIBCORE */
 452
 453         be_init_env(&env, file_handle);
 454
 455         isa = arch_env_get_isa(env.arch_env);
 456
 457         be_dbg_so(env.db_handle, cup_name);
 458         be_dbg_types(env.db_handle);
 459
 460         /* we might need 1 birg more for instrumentation constructor */
 461         num_birgs = get_irp_n_irgs();
 462         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 463
 464         /* First: initialize all birgs */
 465         for(i = 0; i < get_irp_n_irgs(); ++i) {
 466                 ir_graph *irg = get_irp_irg(i);
 467
 468                 initialize_birg(&birgs[i], irg, &env);
 469         }
 470
 471         /*
 472                 Get the filename for the profiling data.
 473                 Beware: '\0' is already included in sizeof(suffix)
 474         */
 475         memset(prof_filename, 0, sizeof(prof_filename));
 476         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 477         strcat(prof_filename, suffix);
 478
 479         /*
 480                 Next: Either instruments all irgs with profiling code
 481                 or try to read in profile data for current translation unit.
 482         */
 483         if (be_options.opt_profile) {
 484                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 485                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 486                 num_birgs++;
 487                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 488         }
 489         else {
 490                 be_profile_read(prof_filename);
 491         }
 492
 493         /* For all graphs */
 494         for (i = 0; i < num_birgs; ++i) {
 495                 be_irg_t *birg = & birgs[i];
 496                 ir_graph *irg  = birg->irg;
 497                 optimization_state_t state;
 498                 const arch_code_generator_if_t *cg_if;
 499                 char irg_name[128];
 500
 501                 /* set the current graph (this is important for several firm functions) */
 502                 current_ir_graph = irg;
 503
 504 #ifdef FIRM_STATISTICS
 505                 if(be_stat_ev_is_active()) {
 506                         ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
 507                         be_stat_tags[STAT_TAG_CLS] = "<all>";
 508                         be_stat_tags[STAT_TAG_IRG] = irg_name;
 509                         be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 510                 }
 511 #endif
 512
 513                 /* stop and reset timers */
 514                 BE_TIMER_ONLY(
 515                         LC_STOP_AND_RESET_TIMER(t_abi);
 516                         LC_STOP_AND_RESET_TIMER(t_codegen);
 517                         LC_STOP_AND_RESET_TIMER(t_sched);
 518                         LC_STOP_AND_RESET_TIMER(t_constr);
 519                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 520                         LC_STOP_AND_RESET_TIMER(t_finish);
 521                         LC_STOP_AND_RESET_TIMER(t_emit);
 522                         LC_STOP_AND_RESET_TIMER(t_verify);
 523                         LC_STOP_AND_RESET_TIMER(t_other);
 524                 );
 525                 BE_TIMER_PUSH(t_other);   /* t_other */
 526
 527                 /* Verify the initial graph */
 528                 BE_TIMER_PUSH(t_verify);
 529                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 530                         irg_verify(irg, VRFY_ENFORCE_SSA);
 531                         be_check_dominance(irg);
 532                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 533                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 534                         assert(be_check_dominance(irg) && "Dominance verification failed");
 535                 }
 536                 BE_TIMER_POP(t_verify);
 537
 538                 /**
 539                  * Create execution frequencies from profile data or estimate some
 540                  */
 541                 if (be_profile_has_data()) {
 542                         birg->exec_freq = be_create_execfreqs_from_profile(irg);
 543                 } else {
 544                         birg->exec_freq = compute_execfreq(irg, 10);
 545                 }
 546
 547                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 548
 549                 /* Get the code generator interface. */
 550                 cg_if = isa->impl->get_code_generator_if(isa);
 551
 552                 /* get a code generator for this graph. */
 553                 birg->cg = cg_if->init(birg);
 554
 555                 /* some transformations need to be done before abi introduce */
 556                 arch_code_generator_before_abi(birg->cg);
 557
 558                 /* reset the phi handler. */
 559                 be_phi_handler_reset(env.phi_handler);
 560
 561                 /* implement the ABI conventions. */
 562                 BE_TIMER_PUSH(t_abi);
 563                 birg->abi = be_abi_introduce(birg);
 564                 BE_TIMER_POP(t_abi);
 565
 566                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 567                 be_do_stat_nodes(irg, "02 Abi");
 568
 569                 /* generate code */
 570                 BE_TIMER_PUSH(t_codegen);
 571                 arch_code_generator_prepare_graph(birg->cg);
 572                 BE_TIMER_POP(t_codegen);
 573
 574                 be_do_stat_nodes(irg, "03 Prepare");
 575
 576                 /*
 577                         Since the code generator made a lot of new nodes and skipped
 578                         a lot of old ones, we should do dead node elimination here.
 579                         Note that this requires disabling the edges here.
 580                 */
 581                 edges_deactivate(irg);
 582                 //dead_node_elimination(irg);
 583                 edges_activate(irg);
 584
 585                 /* Compute loop nesting information (for weighting copies) */
 586                 construct_cf_backedges(irg);
 587                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 588                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 589
 590                 /* let backend prepare scheduling */
 591                 BE_TIMER_PUSH(t_codegen);
 592                 arch_code_generator_before_sched(birg->cg);
 593                 BE_TIMER_POP(t_codegen);
 594
 595                 /* schedule the irg */
 596                 BE_TIMER_PUSH(t_sched);
 597                 switch (be_options.scheduler) {
 598                         default:
 599                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 600                         case BE_SCHED_LIST:
 601                                 list_sched(birg, &be_options);
 602                                 break;
 603 #ifdef WITH_ILP
 604                         case BE_SCHED_ILP:
 605                                 be_ilp_sched(birg);
 606                                 //fprintf(stderr, "Warning: ILP scheduler not yet fully implemented, falling back to list scheduler.\n");
 607                                 //list_sched(birg, &be_options);
 608                                 break;
 609 #endif /* WITH_ILP */
 610                 };
 611                 BE_TIMER_POP(t_sched);
 612
 613                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 614
 615                 /* check schedule */
 616                 BE_TIMER_PUSH(t_verify);
 617                 be_sched_vrfy(irg, be_options.vrfy_option);
 618                 BE_TIMER_POP(t_verify);
 619
 620                 be_do_stat_nodes(irg, "04 Schedule");
 621
 622                 /* introduce patterns to assure constraints */
 623                 BE_TIMER_PUSH(t_constr);
 624                 /* we switch off optimizations here, because they might cause trouble */
 625                 save_optimization_state(&state);
 626                 set_optimize(0);
 627                 set_opt_normalize(0);
 628
 629                 /* add Keeps for should_be_different constrained nodes  */
 630                 /* beware: needs schedule due to usage of be_ssa_constr */
 631                 assure_constraints(birg);
 632                 BE_TIMER_POP(t_constr);
 633
 634                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 635                 be_do_stat_nodes(irg, "05 Constraints");
 636
 637                 /* connect all stack modifying nodes together (see beabi.c) */
 638                 BE_TIMER_PUSH(t_abi);
 639                 be_abi_fix_stack_nodes(birg->abi, NULL);
 640                 BE_TIMER_POP(t_abi);
 641
 642                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 643
 644                 /* check schedule */
 645                 BE_TIMER_PUSH(t_verify);
 646                 be_sched_vrfy(irg, be_options.vrfy_option);
 647                 BE_TIMER_POP(t_verify);
 648
 649                 /* do some statistics */
 650                 be_do_stat_reg_pressure(birg);
 651
 652                 /* stuff needs to be done after scheduling but before register allocation */
 653                 BE_TIMER_PUSH(t_codegen);
 654                 arch_code_generator_before_ra(birg->cg);
 655                 BE_TIMER_POP(t_codegen);
 656
 657 #ifdef FIRM_STATISTICS
 658                 if(be_stat_ev_is_active()) {
 659                         be_stat_ev_l("costs_before_ra",
 660                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 661                 }
 662 #endif
 663
 664                 /* Do register allocation */
 665                 BE_TIMER_PUSH(t_regalloc);
 666                 ra_timer = ra->allocate(birg);
 667                 BE_TIMER_POP(t_regalloc);
 668
 669 #ifdef FIRM_STATISTICS
 670                 if(be_stat_ev_is_active()) {
 671                         be_stat_ev_l("costs_after_ra",
 672                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 673                 }
 674 #endif
 675
 676                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 677                 be_do_stat_nodes(irg, "06 Register Allocation");
 678
 679                 /* let the code generator prepare the graph for emitter */
 680                 BE_TIMER_PUSH(t_finish);
 681                 arch_code_generator_after_ra(birg->cg);
 682                 BE_TIMER_POP(t_finish);
 683
 684                 /* fix stack offsets */
 685                 BE_TIMER_PUSH(t_abi);
 686                 be_abi_fix_stack_nodes(birg->abi, NULL);
 687                 be_remove_dead_nodes_from_schedule(irg);
 688                 be_abi_fix_stack_bias(birg->abi);
 689                 BE_TIMER_POP(t_abi);
 690
 691                 BE_TIMER_PUSH(t_finish);
 692                 arch_code_generator_finish(birg->cg);
 693                 BE_TIMER_POP(t_finish);
 694
 695                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 696
 697                 /* check schedule and register allocation */
 698                 BE_TIMER_PUSH(t_verify);
 699                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 700                         //irg_verify(irg, VRFY_ENFORCE_SSA);
 701                         be_check_dominance(irg);
 702                         be_verify_out_edges(irg);
 703                         be_verify_schedule(irg);
 704                         be_verify_register_allocation(env.arch_env, irg);
 705                 }
 706                 else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 707                         //assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 708                         assert(be_verify_out_edges(irg));
 709                         assert(be_check_dominance(irg) && "Dominance verification failed");
 710                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 711                         assert(be_verify_register_allocation(env.arch_env, irg)
 712                                && "register allocation verification failed");
 713                 }
 714                 BE_TIMER_POP(t_verify);
 715
 716                 /* emit assembler code */
 717                 BE_TIMER_PUSH(t_emit);
 718                 arch_code_generator_done(birg->cg);
 719                 BE_TIMER_POP(t_emit);
 720
 721                 dump(DUMP_FINAL, irg, "-end", dump_ir_extblock_graph_sched);
 722
 723                 BE_TIMER_PUSH(t_abi);
 724                 be_abi_free(birg->abi);
 725                 BE_TIMER_POP(t_abi);
 726
 727                 be_do_stat_nodes(irg, "07 Final");
 728                 restore_optimization_state(&state);
 729
 730                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 731                 BE_TIMER_POP(t_other);
 732
 733 #define LC_EMIT(timer)  \
 734         if(!be_stat_ev_is_active()) { \
 735                 printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 736         } else { \
 737                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 738         }
 739 #define LC_EMIT_RA(timer) \
 740         if(!be_stat_ev_is_active()) { \
 741                 printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 742         } else { \
 743                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 744         }
 745                 BE_TIMER_ONLY(
 746                         if(!be_stat_ev_is_active()) {
 747                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 748                                 printf("# nodes at begin:  %u\n", num_nodes_b);
 749                                 printf("# nodes before ra: %u\n", num_nodes_r);
 750                                 printf("# nodes at end:    %u\n\n", num_nodes_a);
 751                         }
 752                         LC_EMIT(t_abi);
 753                         LC_EMIT(t_codegen);
 754                         LC_EMIT(t_sched);
 755                         LC_EMIT(t_constr);
 756                         LC_EMIT(t_regalloc);
 757                         LC_EMIT_RA(ra_timer->t_prolog);
 758                         LC_EMIT_RA(ra_timer->t_live);
 759                         LC_EMIT_RA(ra_timer->t_spill);
 760                         LC_EMIT_RA(ra_timer->t_spillslots);
 761                         LC_EMIT_RA(ra_timer->t_color);
 762                         LC_EMIT_RA(ra_timer->t_ifg);
 763                         LC_EMIT_RA(ra_timer->t_copymin);
 764                         LC_EMIT_RA(ra_timer->t_ssa);
 765                         LC_EMIT_RA(ra_timer->t_epilog);
 766                         LC_EMIT_RA(ra_timer->t_verify);
 767                         LC_EMIT_RA(ra_timer->t_other);
 768                         LC_EMIT(t_finish);
 769                         LC_EMIT(t_emit);
 770                         LC_EMIT(t_verify);
 771                         LC_EMIT(t_other);
 772                 );
 773 #undef LC_EMIT_RA
 774 #undef LC_EMIT
 775
 776                 free_execfreq(birg->exec_freq);
 777                 birg->exec_freq = NULL;
 778
 779                 if(birg->dom_front != NULL) {
 780                         be_free_dominance_frontiers(birg->dom_front);
 781                         birg->dom_front = NULL;
 782                 }
 783                 if(birg->lv != NULL) {
 784                         be_liveness_free(birg->lv);
 785                         birg->lv = NULL;
 786                 }
 787
 788         /* switched off due to statistics (statistic module needs all irgs) */
 789 #ifdef FIRM_STATISTICS
 790                 if (! stat_is_active())
 791 #endif
 792                         free_ir_graph(irg);
 793
 794                 if(be_stat_ev_is_active()) {
 795                         be_stat_ev_pop();
 796                 }
 797         }
 798         be_profile_free();
 799         be_done_env(&env);
 800
 801 #undef BE_TIMER_POP
 802 #undef BE_TIMER_PUSH
 803 #undef BE_TIMER_ONLY
 804 }
 805
 806 /* Main interface to the frontend. */
 807 void be_main(FILE *file_handle, const char *cup_name)
 808 {
 809 #ifdef WITH_LIBCORE
 810         lc_timer_t *t = NULL;
 811
 812         /* The user specified another config file to read. do that now. */
 813         if(strlen(config_file) > 0) {
 814                 FILE *f;
 815
 816                 if((f = fopen(config_file, "rt")) != NULL) {
 817                         lc_opt_from_file(config_file, f, NULL);
 818                         fclose(f);
 819                 }
 820         }
 821
 822         if (be_options.timing == BE_TIME_ON) {
 823                 t = lc_timer_register("bemain", "measure complete bemain loop");
 824
 825                 if (lc_timer_enter_high_priority()) {
 826                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 827                 }
 828
 829                 lc_timer_reset_and_start(t);
 830         }
 831
 832 #ifdef FIRM_STATISTICS
 833         be_init_stat_file(be_options.stat_file_name, cup_name);
 834 #endif
 835 #endif /* WITH_LIBCORE */
 836
 837         /* never build code for pseudo irgs */
 838         set_visit_pseudo_irgs(0);
 839
 840         be_node_init();
 841
 842         be_main_loop(file_handle, cup_name);
 843
 844 #ifdef WITH_LIBCORE
 845         if (be_options.timing == BE_TIME_ON) {
 846                 lc_timer_stop(t);
 847                 lc_timer_leave_high_priority();
 848                 if(be_stat_ev_is_active()) {
 849                         be_stat_ev_l("backend_time", lc_timer_elapsed_msec(t));
 850                 } else {
 851                         printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 852                 }
 853         }
 854
 855 #ifdef FIRM_STATISTICS
 856         be_close_stat_file();
 857 #endif
 858 #endif /* WITH_LIBCORE */
 859 }
 860
 861 /** The debug info retriever function. */
 862 static retrieve_dbg_func retrieve_dbg = NULL;
 863
 864 /* Sets a debug info retriever. */
 865 void be_set_debug_retrieve(retrieve_dbg_func func) {
 866         retrieve_dbg = func;
 867 }
 868
 869 /* Retrieve the debug info. */
 870 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 871         if (retrieve_dbg)
 872                 return retrieve_dbg(dbg, line);
 873
 874         *line = 0;
 875         return NULL;
 876 }
 877
 878 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 879 {
 880         if(bs == NULL)
 881                 bs = bitset_alloca(cls->n_regs);
 882         else
 883                 bitset_clear_all(bs);
 884
 885         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 886         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 887         bitset_flip_all(bs);
 888         be_abi_put_ignore_regs(birg->abi, cls, bs);
 889
 890         return bitset_popcnt(bs);
 891 }
 892
 893 void be_assure_liveness(be_irg_t *birg)
 894 {
 895         if(birg->lv != NULL)
 896                 return;
 897
 898         birg->lv = be_liveness(birg->irg);
 899 }
 900
 901 void be_invalidate_liveness(be_irg_t *birg)
 902 {
 903         if(birg->lv == NULL)
 904                 return;
 905
 906         be_liveness_free(birg->lv);
 907         birg->lv = NULL;
 908 }
 909
 910 void be_assure_dom_front(be_irg_t *birg)
 911 {
 912         if(birg->dom_front != NULL)
 913                 return;
 914
 915         birg->dom_front = be_compute_dominance_frontiers(birg->irg);
 916 }
 917
 918 void be_invalidate_dom_front(be_irg_t *birg)
 919 {
 920         if(birg->dom_front == NULL)
 921                 return;
 922
 923         be_free_dominance_frontiers(birg->dom_front);
 924         birg->dom_front = NULL;
 925 }