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 #include <libcore/lc_opts.h>
  15 #include <libcore/lc_opts_enum.h>
  16 #include <libcore/lc_timing.h>
  17
  18 #include "obst.h"
  19 #include "bitset.h"
  20
  21 #include "irprog.h"
  22 #include "irgopt.h"
  23 #include "irgraph.h"
  24 #include "irdump.h"
  25 #include "phiclass.h"
  26 #include "irdom_t.h"
  27 #include "iredges_t.h"
  28 #include "irloop_t.h"
  29 #include "irtools.h"
  30 #include "irvrfy.h"
  31 #include "irprintf.h"
  32 #include "return.h"
  33 #include "firmstat.h"
  34 #include "cfopt.h"
  35 #include "execfreq.h"
  36
  37 #include "bearch.h"
  38 #include "be_t.h"
  39 #include "bemodule.h"
  40 #include "beutil.h"
  41 #include "benode_t.h"
  42 #include "beirgmod.h"
  43 #include "besched_t.h"
  44 #include "belistsched.h"
  45 #include "belive_t.h"
  46 #include "bespillbelady.h"
  47 #include "bera.h"
  48 #include "beraextern.h"
  49 #include "bechordal_t.h"
  50 #include "beifg.h"
  51 #include "beifg_impl.h"
  52 #include "becopyopt.h"
  53 #include "becopystat.h"
  54 #include "bessadestr.h"
  55 #include "beabi.h"
  56 #include "belower.h"
  57 #include "beschedmris.h"
  58 #include "bestat.h"
  59 #include "beverify.h"
  60 #include "beprofile.h"
  61 #include "be_dbgout.h"
  62
  63 #ifdef WITH_ILP
  64 #include "beilpsched.h"
  65 #endif /* WITH_ILP */
  66
  67 /* options visible for anyone */
  68 static be_options_t be_options = {
  69         DUMP_NONE,                         /* dump flags */
  70         BE_TIME_OFF,                       /* no timing */
  71         0,                                 /* no opt profile */
  72         1,                                 /* try to omit frame pointer */
  73         0,                                 /* no stabs debugging output */
  74         BE_VRFY_WARN,                      /* verification level: warn */
  75         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  76         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  77         "cplex",                           /* ilp solver */
  78         "",                                /* filename for statistic output */
  79 };
  80
  81 /* config file. */
  82 static char config_file[256] = { 0 };
  83
  84 /* back end instruction set architecture to use */
  85 static const arch_isa_if_t *isa_if = NULL;
  86
  87 /* possible dumping options */
  88 static const lc_opt_enum_mask_items_t dump_items[] = {
  89         { "none",       DUMP_NONE },
  90         { "initial",    DUMP_INITIAL },
  91         { "abi",        DUMP_ABI    },
  92         { "sched",      DUMP_SCHED  },
  93         { "prepared",   DUMP_PREPARED },
  94         { "regalloc",   DUMP_RA },
  95         { "final",      DUMP_FINAL },
  96         { "be",         DUMP_BE },
  97         { "all",        2 * DUMP_BE - 1 },
  98         { NULL,         0 }
  99 };
 100
 101 /* verify options. */
 102 static const lc_opt_enum_int_items_t vrfy_items[] = {
 103         { "off",    BE_VRFY_OFF    },
 104         { "warn",   BE_VRFY_WARN   },
 105         { "assert", BE_VRFY_ASSERT },
 106         { NULL,     0 }
 107 };
 108
 109 /* scheduling options. */
 110 static const lc_opt_enum_int_items_t sched_items[] = {
 111         { "list", BE_SCHED_LIST },
 112 #ifdef WITH_ILP
 113         { "ilp",  BE_SCHED_ILP  },
 114 #endif /* WITH_ILP */
 115         { NULL,   0 }
 116 };
 117
 118 static lc_opt_enum_mask_var_t dump_var = {
 119         &be_options.dump_flags, dump_items
 120 };
 121
 122 static lc_opt_enum_int_var_t vrfy_var = {
 123         &be_options.vrfy_option, vrfy_items
 124 };
 125
 126 static lc_opt_enum_int_var_t sched_var = {
 127         &be_options.scheduler, sched_items
 128 };
 129
 130 static const lc_opt_table_entry_t be_main_options[] = {
 131         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
 132         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
 133         LC_OPT_ENT_NEGBOOL  ("noomitfp", "do not omit frame pointer",                           &be_options.omit_fp),
 134         LC_OPT_ENT_BOOL     ("stabs",    "enable stabs debug support",                          &be_options.stabs_debug_support),
 135         LC_OPT_ENT_ENUM_PTR ("vrfy",     "verify the backend irg",                              &vrfy_var),
 136         LC_OPT_ENT_BOOL     ("time",     "get backend timing statistics",                       &be_options.timing),
 137         LC_OPT_ENT_BOOL     ("profile",  "instrument the code for execution count profiling",   &be_options.opt_profile),
 138         LC_OPT_ENT_ENUM_PTR ("sched",    "select a scheduler",                                  &sched_var),
 139         LC_OPT_ENT_STR      ("statfile", "append statistics to file statfile", &be_options.stat_file_name, sizeof(be_options.stat_file_name)),
 140
 141 #ifdef WITH_ILP
 142         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 143         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 144 #endif /* WITH_ILP */
 145         { NULL }
 146 };
 147
 148 static be_module_list_entry_t *isa_ifs = NULL;
 149
 150 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 151 {
 152         if(isa_if == NULL)
 153                 isa_if = isa;
 154
 155         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 156 }
 157
 158 void be_opt_register(void)
 159 {
 160         lc_opt_entry_t *be_grp;
 161         static int run_once = 0;
 162
 163         if (run_once) {
 164                 return;
 165         }
 166         run_once     = 1;
 167
 168         be_init_modules();
 169
 170         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 171         lc_opt_add_table(be_grp, be_main_options);
 172
 173         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 174                                &isa_ifs, (void**) &isa_if);
 175 }
 176
 177 /* Parse one argument. */
 178 int be_parse_arg(const char *arg) {
 179         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 180         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 181                 lc_opt_print_help(be_grp, stdout);
 182                 return -1;
 183         }
 184         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 185 }
 186
 187 /** The be parameters returned by default, all off. */
 188 const static backend_params be_params = {
 189         NULL,
 190         NULL,
 191         0,
 192         NULL,
 193 };
 194
 195 /* Perform schedule verification if requested. */
 196 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) {
 197         if (vrfy_opt == BE_VRFY_WARN) {
 198                 be_verify_schedule(irg);
 199         }
 200         else if (vrfy_opt == BE_VRFY_ASSERT) {
 201                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 202         }
 203 }
 204
 205 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 206 const backend_params *be_init(void)
 207 {
 208         be_opt_register();
 209         be_init_modules();
 210
 211         if (isa_if->get_params)
 212                 return isa_if->get_params();
 213         return &be_params;
 214 }
 215
 216 /**
 217  * Initializes the main environment for the backend.
 218  *
 219  * @param env          an empty environment
 220  * @param file_handle  the file handle where the output will be written to
 221  */
 222 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 223 {
 224         memset(env, 0, sizeof(*env));
 225         obstack_init(&env->obst);
 226         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 227         env->options  = &be_options;
 228         FIRM_DBG_REGISTER(env->dbg, "be.main");
 229
 230         arch_env_init(env->arch_env, isa_if, file_handle, env);
 231
 232         /* Register the irn handler of the architecture */
 233         if (arch_isa_get_irn_handler(env->arch_env->isa))
 234                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 235
 236         /*
 237          * Register the node handler of the back end infrastructure.
 238          * This irn handler takes care of the platform independent
 239          * spill, reload and perm nodes.
 240          */
 241         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 242         env->phi_handler = be_phi_handler_new(env->arch_env);
 243         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 244
 245         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 246         return env;
 247 }
 248
 249 static void be_done_env(be_main_env_t *env)
 250 {
 251         env->arch_env->isa->impl->done(env->arch_env->isa);
 252         be_dbg_close(env->db_handle);
 253         be_phi_handler_free(env->phi_handler);
 254         obstack_free(&env->obst, NULL);
 255 }
 256
 257 /**
 258  * A wrapper around a firm dumper. Dumps only, if
 259  * flags are enabled.
 260  *
 261  * @param mask    a bitmask containing the reason what will be dumped
 262  * @param irg     the IR graph to dump
 263  * @param suffix  the suffix for the dumper
 264  * @param dumper  the dumper to be called
 265  */
 266 static void dump(int mask, ir_graph *irg, const char *suffix,
 267                  void (*dumper)(ir_graph *, const char *))
 268 {
 269         if(be_options.dump_flags & mask)
 270                 be_dump(irg, suffix, dumper);
 271 }
 272
 273 /**
 274  * Prepare a backend graph for code generation and initialize its birg
 275  */
 276 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 277 {
 278         memset(birg, 0, sizeof(*birg));
 279         birg->irg = irg;
 280         birg->main_env = env;
 281
 282         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 283         edges_activate_kind(irg, EDGE_KIND_DEP);
 284
 285         DBG((env->dbg, LEVEL_2, "====> IRG: %F\n", irg));
 286         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 287
 288         be_stat_init_irg(env->arch_env, irg);
 289         be_do_stat_nodes(irg, "01 Begin");
 290
 291         /* set the current graph (this is important for several firm functions) */
 292         current_ir_graph = irg;
 293
 294         /* Normalize proj nodes. */
 295         normalize_proj_nodes(irg);
 296
 297         /* Make just one return node. */
 298         normalize_one_return(irg);
 299
 300         /* Remove critical edges */
 301         remove_critical_cf_edges(irg);
 302
 303         /* Ensure, that the ir_edges are computed. */
 304         edges_assure(irg);
 305
 306         /* reset the phi handler. */
 307         be_phi_handler_reset(env->phi_handler);
 308
 309         set_irg_phase_state(irg, phase_backend);
 310 }
 311
 312 #define BE_TIMER_PUSH(timer)                                                        \
 313         if (be_options.timing == BE_TIME_ON) {                                          \
 314                 int res = lc_timer_push(timer);                                             \
 315                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 316                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 317                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 318                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 319                                 lc_timer_get_name(timer));                                          \
 320         }
 321 #define BE_TIMER_POP(timer)                                                                    \
 322         if (be_options.timing == BE_TIME_ON) {                                                     \
 323                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 324                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 325                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 326                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 327                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 328                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 329                 timer = tmp;                                                                           \
 330         }
 331
 332 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 333
 334 /**
 335  * The Firm backend main loop.
 336  * Do architecture specific lowering for all graphs
 337  * and call the architecture specific code generator.
 338  *
 339  * @param file_handle   the file handle the output will be written to
 340  * @param cup_name      name of the compilation unit
 341  */
 342 static void be_main_loop(FILE *file_handle, const char *cup_name)
 343 {
 344         int i;
 345         arch_isa_t *isa;
 346         be_main_env_t env;
 347         unsigned num_nodes_b = 0;
 348         unsigned num_nodes_a = 0;
 349         unsigned num_nodes_r = 0;
 350         char prof_filename[256];
 351         static const char suffix[] = ".prof";
 352         be_irg_t *birgs;
 353         unsigned num_birgs;
 354         ir_graph **irg_list, **backend_irg_list;
 355
 356         lc_timer_t *t_abi      = NULL;
 357         lc_timer_t *t_codegen  = NULL;
 358         lc_timer_t *t_sched    = NULL;
 359         lc_timer_t *t_constr   = NULL;
 360         lc_timer_t *t_regalloc = NULL;
 361         lc_timer_t *t_finish   = NULL;
 362         lc_timer_t *t_emit     = NULL;
 363         lc_timer_t *t_other    = NULL;
 364         lc_timer_t *t_verify   = NULL;
 365
 366         if (be_options.timing == BE_TIME_ON) {
 367                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 368                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 369                 t_sched    = lc_timer_register("sched",    "scheduling");
 370                 t_constr   = lc_timer_register("constr",   "assure constraints");
 371                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 372                 t_finish   = lc_timer_register("finish",   "graph finish");
 373                 t_emit     = lc_timer_register("emiter",   "code emiter");
 374                 t_verify   = lc_timer_register("verify",   "graph verification");
 375                 t_other    = lc_timer_register("other",    "other");
 376         }
 377
 378         be_init_env(&env, file_handle);
 379
 380         isa = arch_env_get_isa(env.arch_env);
 381
 382         be_dbg_so(env.db_handle, cup_name);
 383         be_dbg_types(env.db_handle);
 384
 385         /* backend may provide an ordered list of irgs where code should be generated for */
 386         irg_list         = NEW_ARR_F(ir_graph *, 0);
 387         backend_irg_list = arch_isa_get_backend_irg_list(isa, &irg_list);
 388
 389         /* we might need 1 birg more for instrumentation constructor */
 390         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 391         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 392
 393         /* First: initialize all birgs */
 394         for(i = 0; i < num_birgs; ++i) {
 395                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 396                 initialize_birg(&birgs[i], irg, &env);
 397         }
 398         DEL_ARR_F(irg_list);
 399
 400         /*
 401                 Get the filename for the profiling data.
 402                 Beware: '\0' is already included in sizeof(suffix)
 403         */
 404         memset(prof_filename, 0, sizeof(prof_filename));
 405         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 406         strcat(prof_filename, suffix);
 407
 408         /*
 409                 Next: Either instruments all irgs with profiling code
 410                 or try to read in profile data for current translation unit.
 411         */
 412         if (be_options.opt_profile) {
 413                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 414                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 415                 num_birgs++;
 416                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 417         } else {
 418                 be_profile_read(prof_filename);
 419         }
 420
 421         /* For all graphs */
 422         for (i = 0; i < num_birgs; ++i) {
 423                 be_irg_t *birg = &birgs[i];
 424                 ir_graph *irg  = birg->irg;
 425                 optimization_state_t state;
 426                 const arch_code_generator_if_t *cg_if;
 427                 char irg_name[128];
 428
 429                 /* set the current graph (this is important for several firm functions) */
 430                 current_ir_graph = irg;
 431
 432 #ifdef FIRM_STATISTICS
 433                 if(be_stat_ev_is_active()) {
 434                         ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
 435                         be_stat_tags[STAT_TAG_CLS] = "<all>";
 436                         be_stat_tags[STAT_TAG_IRG] = irg_name;
 437                         be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 438                 }
 439 #endif
 440
 441                 /* stop and reset timers */
 442                 BE_TIMER_ONLY(
 443                         LC_STOP_AND_RESET_TIMER(t_abi);
 444                         LC_STOP_AND_RESET_TIMER(t_codegen);
 445                         LC_STOP_AND_RESET_TIMER(t_sched);
 446                         LC_STOP_AND_RESET_TIMER(t_constr);
 447                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 448                         LC_STOP_AND_RESET_TIMER(t_finish);
 449                         LC_STOP_AND_RESET_TIMER(t_emit);
 450                         LC_STOP_AND_RESET_TIMER(t_verify);
 451                         LC_STOP_AND_RESET_TIMER(t_other);
 452                 );
 453                 BE_TIMER_PUSH(t_other);   /* t_other */
 454
 455                 /* Verify the initial graph */
 456                 BE_TIMER_PUSH(t_verify);
 457                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 458                         irg_verify(irg, VRFY_ENFORCE_SSA);
 459                         be_check_dominance(irg);
 460                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 461                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 462                         assert(be_check_dominance(irg) && "Dominance verification failed");
 463                 }
 464                 BE_TIMER_POP(t_verify);
 465
 466                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 467
 468                 /* Get the code generator interface. */
 469                 cg_if = isa->impl->get_code_generator_if(isa);
 470
 471                 /* get a code generator for this graph. */
 472                 birg->cg = cg_if->init(birg);
 473
 474                 /* some transformations need to be done before abi introduce */
 475                 arch_code_generator_before_abi(birg->cg);
 476
 477                 /* reset the phi handler. */
 478                 be_phi_handler_reset(env.phi_handler);
 479
 480                 /* implement the ABI conventions. */
 481                 BE_TIMER_PUSH(t_abi);
 482                 birg->abi = be_abi_introduce(birg);
 483                 BE_TIMER_POP(t_abi);
 484
 485                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 486                 be_do_stat_nodes(irg, "02 Abi");
 487
 488                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 489                         be_check_dominance(irg);
 490                         be_verify_out_edges(irg);
 491                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 492                         assert(be_verify_out_edges(irg));
 493                         assert(be_check_dominance(irg) && "Dominance verification failed");
 494                 }
 495
 496                 /* generate code */
 497                 BE_TIMER_PUSH(t_codegen);
 498                 arch_code_generator_prepare_graph(birg->cg);
 499                 BE_TIMER_POP(t_codegen);
 500
 501                 be_do_stat_nodes(irg, "03 Prepare");
 502
 503                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 504                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 505
 506                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 507                         be_check_dominance(irg);
 508                         be_verify_out_edges(irg);
 509                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 510                         assert(be_verify_out_edges(irg));
 511                         assert(be_check_dominance(irg) && "Dominance verification failed");
 512                 }
 513
 514                 /**
 515                  * Create execution frequencies from profile data or estimate some
 516                  */
 517                 if (be_profile_has_data()) {
 518                         birg->exec_freq = be_create_execfreqs_from_profile(irg);
 519                 } else {
 520                         birg->exec_freq = compute_execfreq(irg, 10);
 521                 }
 522
 523                 /* let backend prepare scheduling */
 524                 BE_TIMER_PUSH(t_codegen);
 525                 arch_code_generator_before_sched(birg->cg);
 526                 BE_TIMER_POP(t_codegen);
 527
 528                 /* schedule the irg */
 529                 BE_TIMER_PUSH(t_sched);
 530                 switch (be_options.scheduler) {
 531                         default:
 532                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 533                         case BE_SCHED_LIST:
 534                                 list_sched(birg, &be_options);
 535                                 break;
 536 #ifdef WITH_ILP
 537                         case BE_SCHED_ILP:
 538                                 be_ilp_sched(birg, &be_options);
 539                                 break;
 540 #endif /* WITH_ILP */
 541                 };
 542                 BE_TIMER_POP(t_sched);
 543
 544                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 545
 546                 /* check schedule */
 547                 BE_TIMER_PUSH(t_verify);
 548                 be_sched_vrfy(irg, be_options.vrfy_option);
 549                 BE_TIMER_POP(t_verify);
 550
 551                 be_do_stat_nodes(irg, "04 Schedule");
 552
 553                 /* introduce patterns to assure constraints */
 554                 BE_TIMER_PUSH(t_constr);
 555                 /* we switch off optimizations here, because they might cause trouble */
 556                 save_optimization_state(&state);
 557                 set_optimize(0);
 558                 set_opt_normalize(0);
 559
 560                 /* add Keeps for should_be_different constrained nodes  */
 561                 /* beware: needs schedule due to usage of be_ssa_constr */
 562                 assure_constraints(birg);
 563                 BE_TIMER_POP(t_constr);
 564
 565                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 566                 be_do_stat_nodes(irg, "05 Constraints");
 567
 568                 /* connect all stack modifying nodes together (see beabi.c) */
 569                 BE_TIMER_PUSH(t_abi);
 570                 be_abi_fix_stack_nodes(birg->abi, NULL);
 571                 BE_TIMER_POP(t_abi);
 572
 573                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 574
 575                 /* check schedule */
 576                 BE_TIMER_PUSH(t_verify);
 577                 be_sched_vrfy(irg, be_options.vrfy_option);
 578                 BE_TIMER_POP(t_verify);
 579
 580                 /* do some statistics */
 581                 be_do_stat_reg_pressure(birg);
 582
 583                 /* stuff needs to be done after scheduling but before register allocation */
 584                 BE_TIMER_PUSH(t_codegen);
 585                 arch_code_generator_before_ra(birg->cg);
 586                 BE_TIMER_POP(t_codegen);
 587
 588 #ifdef FIRM_STATISTICS
 589                 if(be_stat_ev_is_active()) {
 590                         be_stat_ev_l("costs_before_ra",
 591                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 592                 }
 593 #endif
 594
 595                 /* Do register allocation */
 596                 BE_TIMER_PUSH(t_regalloc);
 597                 be_allocate_registers(birg);
 598                 BE_TIMER_POP(t_regalloc);
 599
 600 #ifdef FIRM_STATISTICS
 601                 if(be_stat_ev_is_active()) {
 602                         be_stat_ev_l("costs_after_ra",
 603                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 604                 }
 605 #endif
 606
 607                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 608                 be_do_stat_nodes(irg, "06 Register Allocation");
 609
 610                 /* let the code generator prepare the graph for emitter */
 611                 BE_TIMER_PUSH(t_finish);
 612                 arch_code_generator_after_ra(birg->cg);
 613                 BE_TIMER_POP(t_finish);
 614
 615                 /* fix stack offsets */
 616                 BE_TIMER_PUSH(t_abi);
 617                 be_abi_fix_stack_nodes(birg->abi, NULL);
 618                 be_remove_dead_nodes_from_schedule(irg);
 619                 be_abi_fix_stack_bias(birg->abi);
 620                 BE_TIMER_POP(t_abi);
 621
 622                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 623
 624                 BE_TIMER_PUSH(t_finish);
 625                 arch_code_generator_finish(birg->cg);
 626                 BE_TIMER_POP(t_finish);
 627
 628                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 629
 630                 /* check schedule and register allocation */
 631                 BE_TIMER_PUSH(t_verify);
 632                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 633                         irg_verify(irg, VRFY_ENFORCE_SSA);
 634                         be_check_dominance(irg);
 635                         be_verify_out_edges(irg);
 636                         be_verify_schedule(irg);
 637                         be_verify_register_allocation(env.arch_env, irg);
 638                         be_verify_spillslots(env.arch_env, irg);
 639                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 640                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 641                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 642                         assert(be_check_dominance(irg) && "Dominance verification failed");
 643                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 644                         assert(be_verify_register_allocation(env.arch_env, irg)
 645                                && "register allocation verification failed");
 646                         assert(be_verify_spillslots(env.arch_env, irg) && "Spillslot verification failed");
 647
 648                 }
 649                 BE_TIMER_POP(t_verify);
 650
 651                 /* emit assembler code */
 652                 BE_TIMER_PUSH(t_emit);
 653                 arch_code_generator_done(birg->cg);
 654                 BE_TIMER_POP(t_emit);
 655
 656                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 657
 658                 BE_TIMER_PUSH(t_abi);
 659                 be_abi_free(birg->abi);
 660                 BE_TIMER_POP(t_abi);
 661
 662                 be_do_stat_nodes(irg, "07 Final");
 663                 restore_optimization_state(&state);
 664
 665                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 666                 BE_TIMER_POP(t_other);
 667
 668 #define LC_EMIT(timer)  \
 669         if(!be_stat_ev_is_active()) { \
 670                 printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 671         } else { \
 672                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 673         }
 674 #define LC_EMIT_RA(timer) \
 675         if(!be_stat_ev_is_active()) { \
 676                 printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 677         } else { \
 678                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 679         }
 680                 BE_TIMER_ONLY(
 681                         if(!be_stat_ev_is_active()) {
 682                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 683                                 printf("# nodes at begin:  %u\n", num_nodes_b);
 684                                 printf("# nodes before ra: %u\n", num_nodes_r);
 685                                 printf("# nodes at end:    %u\n\n", num_nodes_a);
 686                         }
 687                         LC_EMIT(t_abi);
 688                         LC_EMIT(t_codegen);
 689                         LC_EMIT(t_sched);
 690                         LC_EMIT(t_constr);
 691                         LC_EMIT(t_regalloc);
 692                         if(global_ra_timer != NULL) {
 693                                 LC_EMIT_RA(global_ra_timer->t_prolog);
 694                                 LC_EMIT_RA(global_ra_timer->t_live);
 695                                 LC_EMIT_RA(global_ra_timer->t_spill);
 696                                 LC_EMIT_RA(global_ra_timer->t_spillslots);
 697                                 LC_EMIT_RA(global_ra_timer->t_color);
 698                                 LC_EMIT_RA(global_ra_timer->t_ifg);
 699                                 LC_EMIT_RA(global_ra_timer->t_copymin);
 700                                 LC_EMIT_RA(global_ra_timer->t_ssa);
 701                                 LC_EMIT_RA(global_ra_timer->t_epilog);
 702                                 LC_EMIT_RA(global_ra_timer->t_verify);
 703                                 LC_EMIT_RA(global_ra_timer->t_other);
 704                         }
 705                         LC_EMIT(t_finish);
 706                         LC_EMIT(t_emit);
 707                         LC_EMIT(t_verify);
 708                         LC_EMIT(t_other);
 709                 );
 710 #undef LC_EMIT_RA
 711 #undef LC_EMIT
 712
 713                 be_free_birg(birg);
 714
 715         /* switched off due to statistics (statistic module needs all irgs) */
 716 #if 0   /* STA needs irgs */
 717 #ifdef FIRM_STATISTICS
 718                 if (! stat_is_active())
 719 #endif /* FIRM_STATISTICS */
 720                         free_ir_graph(irg);
 721 #endif /* if 0 */
 722                 if(be_stat_ev_is_active()) {
 723                         be_stat_ev_pop();
 724                 }
 725         }
 726         be_profile_free();
 727         be_done_env(&env);
 728
 729 #undef BE_TIMER_POP
 730 #undef BE_TIMER_PUSH
 731 #undef BE_TIMER_ONLY
 732 }
 733
 734 /* Main interface to the frontend. */
 735 void be_main(FILE *file_handle, const char *cup_name)
 736 {
 737         lc_timer_t *t = NULL;
 738
 739         /* The user specified another config file to read. do that now. */
 740         if(strlen(config_file) > 0) {
 741                 FILE *f;
 742
 743                 if((f = fopen(config_file, "rt")) != NULL) {
 744                         lc_opt_from_file(config_file, f, NULL);
 745                         fclose(f);
 746                 }
 747         }
 748
 749         if (be_options.timing == BE_TIME_ON) {
 750                 t = lc_timer_register("bemain", "measure complete bemain loop");
 751
 752                 if (lc_timer_enter_high_priority()) {
 753                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 754                 }
 755
 756                 lc_timer_reset_and_start(t);
 757         }
 758
 759 #ifdef FIRM_STATISTICS
 760         be_init_stat_file(be_options.stat_file_name, cup_name);
 761 #endif
 762
 763         /* never build code for pseudo irgs */
 764         set_visit_pseudo_irgs(0);
 765
 766         be_node_init();
 767
 768         be_main_loop(file_handle, cup_name);
 769
 770         if (be_options.timing == BE_TIME_ON) {
 771                 lc_timer_stop(t);
 772                 lc_timer_leave_high_priority();
 773                 if(be_stat_ev_is_active()) {
 774                         be_stat_ev_l("backend_time", lc_timer_elapsed_msec(t));
 775                 } else {
 776                         printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 777                 }
 778         }
 779
 780 #ifdef FIRM_STATISTICS
 781         be_close_stat_file();
 782 #endif
 783 }
 784
 785 /** The debug info retriever function. */
 786 static retrieve_dbg_func retrieve_dbg = NULL;
 787
 788 /* Sets a debug info retriever. */
 789 void be_set_debug_retrieve(retrieve_dbg_func func) {
 790         retrieve_dbg = func;
 791 }
 792
 793 /* Retrieve the debug info. */
 794 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 795         if (retrieve_dbg)
 796                 return retrieve_dbg(dbg, line);
 797
 798         *line = 0;
 799         return NULL;
 800 }
 801
 802 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 803 {
 804         if(bs == NULL)
 805                 bs = bitset_alloca(cls->n_regs);
 806         else
 807                 bitset_clear_all(bs);
 808
 809         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 810         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 811         bitset_flip_all(bs);
 812         be_abi_put_ignore_regs(birg->abi, cls, bs);
 813
 814         return bitset_popcnt(bs);
 815 }