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