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 "return.h"
  34 #include "firmstat.h"
  35 #include "cfopt.h"
  36 #include "execfreq.h"
  37
  38 #include "bearch.h"
  39 #include "firm/bearch_firm.h"
  40 #include "ia32/bearch_ia32.h"
  41 #include "arm/bearch_arm.h"
  42 #include "ppc32/bearch_ppc32.h"
  43 #include "mips/bearch_mips.h"
  44
  45 #include "be_t.h"
  46 #include "benumb_t.h"
  47 #include "beutil.h"
  48 #include "benode_t.h"
  49 #include "beirgmod.h"
  50 #include "besched_t.h"
  51 #include "belistsched.h"
  52 #include "belive_t.h"
  53 #include "bespillbelady.h"
  54 #include "bera.h"
  55 #include "beraextern.h"
  56 #include "bechordal_t.h"
  57 #include "beifg.h"
  58 #include "beifg_impl.h"
  59 #include "becopyopt.h"
  60 #include "becopystat.h"
  61 #include "bessadestr.h"
  62 #include "beabi.h"
  63 #include "belower.h"
  64 #include "beschedmris.h"
  65 #include "bestat.h"
  66 #include "beverify.h"
  67 #include "beprofile.h"
  68 #include "beblocksched.h"
  69 #include "be_dbgout.h"
  70
  71 #ifdef WITH_ILP
  72 #include "beilpsched.h"
  73 #endif /* WITH_ILP */
  74
  75 /* options visible for anyone */
  76 static be_options_t be_options = {
  77         DUMP_NONE,                         /* dump flags */
  78         BE_TIME_OFF,                       /* no timing */
  79         0,                                 /* no opt profile */
  80         1,                                 /* try to omit frame pointer */
  81         0,                                 /* always stabs debugging output */
  82         BE_VRFY_WARN,                      /* verification level: warn */
  83         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  84         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  85         "cplex"                            /* ilp solver */
  86 };
  87
  88 /* config file. */
  89 static char config_file[256] = { 0 };
  90
  91 /* register allocator to use. */
  92 static const be_ra_t *ra = &be_ra_chordal_allocator;
  93
  94 /* back end instruction set architecture to use */
  95 static const arch_isa_if_t *isa_if = &ia32_isa_if;
  96
  97 #ifdef WITH_LIBCORE
  98
  99 static lc_opt_entry_t *be_grp_root = NULL;
 100
 101 /* possible dumping options */
 102 static const lc_opt_enum_mask_items_t dump_items[] = {
 103         { "none",       DUMP_NONE },
 104         { "initial",    DUMP_INITIAL },
 105         { "abi",        DUMP_ABI    },
 106         { "sched",      DUMP_SCHED  },
 107         { "prepared",   DUMP_PREPARED },
 108         { "regalloc",   DUMP_RA },
 109         { "final",      DUMP_FINAL },
 110         { "be",         DUMP_BE },
 111         { "all",        2 * DUMP_BE - 1 },
 112         { NULL,         0 }
 113 };
 114
 115 /* register allocators */
 116 static const lc_opt_enum_const_ptr_items_t ra_items[] = {
 117         { "chordal",  &be_ra_chordal_allocator },
 118         { "external", &be_ra_external_allocator },
 119         { NULL,      NULL }
 120 };
 121
 122 /* instruction set architectures. */
 123 static const lc_opt_enum_const_ptr_items_t isa_items[] = {
 124         { "ia32",    &ia32_isa_if },
 125 #if 0
 126         { "arm",     &arm_isa_if },
 127         { "ppc32",   &ppc32_isa_if },
 128         { "mips",    &mips_isa_if },
 129 #endif
 130         { NULL,      NULL }
 131 };
 132
 133 /* verify options. */
 134 static const lc_opt_enum_int_items_t vrfy_items[] = {
 135         { "off",    BE_VRFY_OFF    },
 136         { "warn",   BE_VRFY_WARN   },
 137         { "assert", BE_VRFY_ASSERT },
 138         { NULL,     0 }
 139 };
 140
 141 /* scheduling options. */
 142 static const lc_opt_enum_int_items_t sched_items[] = {
 143         { "list", BE_SCHED_LIST },
 144 #ifdef WITH_ILP
 145         { "ilp",  BE_SCHED_ILP  },
 146 #endif /* WITH_ILP */
 147         { NULL,   0 }
 148 };
 149
 150 static lc_opt_enum_mask_var_t dump_var = {
 151         &be_options.dump_flags, dump_items
 152 };
 153
 154 static lc_opt_enum_const_ptr_var_t ra_var = {
 155         (const void **) &ra, ra_items
 156 };
 157
 158 static lc_opt_enum_const_ptr_var_t isa_var = {
 159         (const void **) &isa_if, isa_items
 160 };
 161
 162 static lc_opt_enum_int_var_t vrfy_var = {
 163         &be_options.vrfy_option, vrfy_items
 164 };
 165
 166 static lc_opt_enum_int_var_t sched_var = {
 167         &be_options.scheduler, sched_items
 168 };
 169
 170 static const lc_opt_table_entry_t be_main_options[] = {
 171         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
 172         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
 173         LC_OPT_ENT_ENUM_PTR ("ra",       "register allocator",                                  &ra_var),
 174         LC_OPT_ENT_ENUM_PTR ("isa",      "the instruction set architecture",                    &isa_var),
 175         LC_OPT_ENT_NEGBOOL  ("noomitfp", "do not omit frame pointer",                           &be_options.omit_fp),
 176         LC_OPT_ENT_BOOL     ("stabs",    "enable stabs debug support",                          &be_options.stabs_debug_support),
 177         LC_OPT_ENT_ENUM_PTR ("vrfy",     "verify the backend irg",                              &vrfy_var),
 178         LC_OPT_ENT_BOOL     ("time",     "get backend timing statistics",                       &be_options.timing),
 179         LC_OPT_ENT_BOOL     ("profile",  "instrument the code for execution count profiling",   &be_options.opt_profile),
 180         LC_OPT_ENT_ENUM_PTR ("sched",    "select a scheduler",                                  &sched_var),
 181         LC_OPT_ENT_STR      ("statfile", "append statistics to file statfile", &be_options.stat_file_name, sizeof(be_options.stat_file_name)),
 182
 183 #ifdef WITH_ILP
 184         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 185         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 186 #endif /* WITH_ILP */
 187         { NULL }
 188 };
 189
 190 #endif /* WITH_LIBCORE */
 191
 192 void be_opt_register(void)
 193 {
 194 #ifdef WITH_LIBCORE
 195         int i;
 196         lc_opt_entry_t *be_grp_ra;
 197         static int run_once = 0;
 198
 199         if (! run_once) {
 200                 run_once     = 1;
 201                 be_grp_root  = lc_opt_get_grp(firm_opt_get_root(), "be");
 202                 be_grp_ra    = lc_opt_get_grp(be_grp_root, "ra");
 203
 204                 lc_opt_add_table(be_grp_root, be_main_options);
 205
 206                 /* register allocator options */
 207                 for(i = 0; ra_items[i].name != NULL; ++i) {
 208                         const be_ra_t *ra = ra_items[i].value;
 209                         ra->register_options(be_grp_ra);
 210                 }
 211
 212                 /* register isa options */
 213                 for(i = 0; isa_items[i].name != NULL; ++i) {
 214                         const arch_isa_if_t *isa = isa_items[i].value;
 215                         isa->register_options(be_grp_root);
 216                 }
 217
 218                 /* scheduler register options */
 219                 list_sched_register_options(be_grp_root);
 220
 221                 be_block_schedule_register_options(be_grp_root);
 222         }
 223 #endif /* WITH_LIBCORE */
 224 }
 225
 226 /* Parse one argument. */
 227 int be_parse_arg(const char *arg) {
 228 #ifdef WITH_LIBCORE
 229         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 230                 lc_opt_print_help(be_grp_root, stdout);
 231                 return -1;
 232         }
 233         return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL);
 234 #else
 235         return 0;
 236 #endif /* WITH_LIBCORE */
 237 }
 238
 239 /** The be parameters returned by default, all off. */
 240 const static backend_params be_params = {
 241         NULL,
 242         NULL,
 243         0,
 244         NULL,
 245 };
 246
 247 /* Perform schedule verification if requested. */
 248 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) {
 249         if (vrfy_opt == BE_VRFY_WARN) {
 250                 be_verify_schedule(irg);
 251         }
 252         else if (vrfy_opt == BE_VRFY_ASSERT) {
 253                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 254         }
 255 }
 256
 257 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 258 const backend_params *be_init(void)
 259 {
 260         be_opt_register();
 261
 262         be_sched_init();
 263         be_numbering_init();
 264         be_copy_opt_init();
 265         copystat_init();
 266         phi_class_init();
 267
 268         if (isa_if->get_params)
 269                 return isa_if->get_params();
 270         return &be_params;
 271 }
 272
 273 /**
 274  * Initializes the main environment for the backend.
 275  *
 276  * @param env          an empty environment
 277  * @param file_handle  the file handle where the output will be written to
 278  */
 279 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 280 {
 281         memset(env, 0, sizeof(*env));
 282         obstack_init(&env->obst);
 283         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 284         env->options  = &be_options;
 285         FIRM_DBG_REGISTER(env->dbg, "be.main");
 286
 287         arch_env_init(env->arch_env, isa_if, file_handle, env);
 288
 289         /* Register the irn handler of the architecture */
 290         if (arch_isa_get_irn_handler(env->arch_env->isa))
 291                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 292
 293         /*
 294          * Register the node handler of the back end infrastructure.
 295          * This irn handler takes care of the platform independent
 296          * spill, reload and perm nodes.
 297          */
 298         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 299         env->phi_handler = be_phi_handler_new(env->arch_env);
 300         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 301
 302         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 303         return env;
 304 }
 305
 306 static void be_done_env(be_main_env_t *env)
 307 {
 308         env->arch_env->isa->impl->done(env->arch_env->isa);
 309         be_dbg_close(env->db_handle);
 310         be_phi_handler_free(env->phi_handler);
 311         obstack_free(&env->obst, NULL);
 312 }
 313
 314 /**
 315  * A wrapper around a firm dumper. Dumps only, if
 316  * flags are enabled.
 317  *
 318  * @param mask    a bitmask containing the reason what will be dumped
 319  * @param irg     the IR graph to dump
 320  * @param suffix  the suffix for the dumper
 321  * @param dumper  the dumper to be called
 322  */
 323 static void dump(int mask, ir_graph *irg, const char *suffix,
 324                  void (*dumper)(ir_graph *, const char *))
 325 {
 326         if(be_options.dump_flags & mask)
 327                 be_dump(irg, suffix, dumper);
 328 }
 329
 330 /**
 331  * Prepare a backend graph for code generation and initialize its birg
 332  */
 333 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 334 {
 335         memset(birg, 0, sizeof(*birg));
 336         birg->irg = irg;
 337         birg->main_env = env;
 338
 339         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 340         edges_activate_kind(irg, EDGE_KIND_DEP);
 341
 342         DBG((env->dbg, LEVEL_2, "====> IRG: %F\n", irg));
 343         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 344
 345         be_stat_init_irg(env->arch_env, irg);
 346         be_do_stat_nodes(irg, "01 Begin");
 347
 348         /* set the current graph (this is important for several firm functions) */
 349         current_ir_graph = irg;
 350
 351         /* Normalize proj nodes. */
 352         normalize_proj_nodes(irg);
 353
 354         /* Make just one return node. */
 355         normalize_one_return(irg);
 356
 357         /* Remove critical edges */
 358         remove_critical_cf_edges(irg);
 359
 360         /* Compute the dominance information. */
 361         free_dom(irg);
 362         compute_doms(irg);
 363
 364         /* Ensure, that the ir_edges are computed. */
 365         edges_assure(irg);
 366
 367         /* check, if the dominance property is fulfilled. */
 368         be_check_dominance(irg);
 369
 370         /* reset the phi handler. */
 371         be_phi_handler_reset(env->phi_handler);
 372 }
 373
 374 #ifdef WITH_LIBCORE
 375
 376 #define BE_TIMER_PUSH(timer)                                                        \
 377         if (be_options.timing == BE_TIME_ON) {                                          \
 378                 int res = lc_timer_push(timer);                                             \
 379                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 380                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 381                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 382                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 383                                 lc_timer_get_name(timer));                                          \
 384         }
 385 #define BE_TIMER_POP(timer)                                                                    \
 386         if (be_options.timing == BE_TIME_ON) {                                                     \
 387                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 388                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 389                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 390                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 391                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 392                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 393                 timer = tmp;                                                                           \
 394         }
 395
 396 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 397
 398 #else
 399
 400 #define BE_TIMER_PUSH(timer)
 401 #define BE_TIMER_POP(timer)
 402 #define BE_TIMER_ONLY(code)
 403
 404 #endif /* WITH_LIBCORE */
 405
 406
 407 /**
 408  * The Firm backend main loop.
 409  * Do architecture specific lowering for all graphs
 410  * and call the architecture specific code generator.
 411  *
 412  * @param file_handle   the file handle the output will be written to
 413  * @param cup_name      name of the compilation unit
 414  */
 415 static void be_main_loop(FILE *file_handle, const char *cup_name)
 416 {
 417         int i;
 418         arch_isa_t *isa;
 419         be_main_env_t env;
 420         unsigned num_nodes_b = 0;
 421         unsigned num_nodes_a = 0;
 422         unsigned num_nodes_r = 0;
 423         char prof_filename[256];
 424         static const char suffix[] = ".prof";
 425         be_irg_t *birgs;
 426         unsigned num_birgs;
 427
 428         be_ra_timer_t *ra_timer;
 429
 430 #ifdef WITH_LIBCORE
 431         lc_timer_t *t_abi      = NULL;
 432         lc_timer_t *t_codegen  = NULL;
 433         lc_timer_t *t_sched    = NULL;
 434         lc_timer_t *t_constr   = NULL;
 435         lc_timer_t *t_regalloc = NULL;
 436         lc_timer_t *t_finish   = NULL;
 437         lc_timer_t *t_emit     = NULL;
 438         lc_timer_t *t_other    = NULL;
 439         lc_timer_t *t_verify   = NULL;
 440
 441         if (be_options.timing == BE_TIME_ON) {
 442                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 443                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 444                 t_sched    = lc_timer_register("sched",    "scheduling");
 445                 t_constr   = lc_timer_register("constr",   "assure constraints");
 446                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 447                 t_finish   = lc_timer_register("finish",   "graph finish");
 448                 t_emit     = lc_timer_register("emiter",   "code emiter");
 449                 t_verify   = lc_timer_register("verify",   "graph verification");
 450                 t_other    = lc_timer_register("other",    "other");
 451         }
 452 #endif /* WITH_LIBCORE */
 453
 454         be_init_env(&env, file_handle);
 455
 456         isa = arch_env_get_isa(env.arch_env);
 457
 458         be_dbg_so(env.db_handle, cup_name);
 459         be_dbg_types(env.db_handle);
 460
 461         /* we might need 1 birg more for instrumentation constructor */
 462         num_birgs = get_irp_n_irgs();
 463         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 464
 465         /* First: initialize all birgs */
 466         for(i = 0; i < get_irp_n_irgs(); ++i) {
 467                 ir_graph *irg = get_irp_irg(i);
 468
 469                 initialize_birg(&birgs[i], irg, &env);
 470         }
 471
 472         /*
 473                 Get the filename for the profiling data.
 474                 Beware: '\0' is already included in sizeof(suffix)
 475         */
 476         memset(prof_filename, 0, sizeof(prof_filename));
 477         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 478         strcat(prof_filename, suffix);
 479
 480         /*
 481                 Next: Either instruments all irgs with profiling code
 482                 or try to read in profile data for current translation unit.
 483         */
 484         if (be_options.opt_profile) {
 485                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 486                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 487                 num_birgs++;
 488                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 489         }
 490         else {
 491                 be_profile_read(prof_filename);
 492         }
 493
 494         /* For all graphs */
 495         for (i = 0; i < num_birgs; ++i) {
 496                 be_irg_t *birg = & birgs[i];
 497                 ir_graph *irg  = birg->irg;
 498                 optimization_state_t state;
 499                 const arch_code_generator_if_t *cg_if;
 500
 501                 /* set the current graph (this is important for several firm functions) */
 502                 current_ir_graph = irg;
 503
 504                 be_init_stat_file(be_options.stat_file_name, irg);
 505
 506                 /* stop and reset timers */
 507                 BE_TIMER_ONLY(
 508                         LC_STOP_AND_RESET_TIMER(t_abi);
 509                         LC_STOP_AND_RESET_TIMER(t_codegen);
 510                         LC_STOP_AND_RESET_TIMER(t_sched);
 511                         LC_STOP_AND_RESET_TIMER(t_constr);
 512                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 513                         LC_STOP_AND_RESET_TIMER(t_finish);
 514                         LC_STOP_AND_RESET_TIMER(t_emit);
 515                         LC_STOP_AND_RESET_TIMER(t_verify);
 516                         LC_STOP_AND_RESET_TIMER(t_other);
 517                 );
 518                 BE_TIMER_PUSH(t_other);   /* t_other */
 519
 520                 /**
 521                  * Create execution frequencies from profile data or estimate some
 522                  */
 523                 if (be_profile_has_data()) {
 524                         birg->execfreqs = be_create_execfreqs_from_profile(irg);
 525                 } else {
 526                         birg->execfreqs = compute_execfreq(irg, 10);
 527                 }
 528
 529                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 530
 531                 /* Get the code generator interface. */
 532                 cg_if = isa->impl->get_code_generator_if(isa);
 533
 534                 /* get a code generator for this graph. */
 535                 birg->cg = cg_if->init(birg);
 536
 537                 /* some transformations need to be done before abi introduce */
 538                 arch_code_generator_before_abi(birg->cg);
 539
 540                 /* reset the phi handler. */
 541                 be_phi_handler_reset(env.phi_handler);
 542
 543                 /* implement the ABI conventions. */
 544                 BE_TIMER_PUSH(t_abi);
 545                 birg->abi = be_abi_introduce(birg);
 546                 BE_TIMER_POP(t_abi);
 547
 548                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 549                 be_do_stat_nodes(irg, "02 Abi");
 550
 551                 /* generate code */
 552                 BE_TIMER_PUSH(t_codegen);
 553                 arch_code_generator_prepare_graph(birg->cg);
 554                 BE_TIMER_POP(t_codegen);
 555
 556                 be_do_stat_nodes(irg, "03 Prepare");
 557
 558                 /*
 559                         Since the code generator made a lot of new nodes and skipped
 560                         a lot of old ones, we should do dead node elimination here.
 561                         Note that this requires disabling the edges here.
 562                 */
 563                 edges_deactivate(irg);
 564                 //dead_node_elimination(irg);
 565                 edges_activate(irg);
 566
 567                 /* Compute loop nesting information (for weighting copies) */
 568                 construct_cf_backedges(irg);
 569                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 570                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 571
 572                 /* let backend prepare scheduling */
 573                 BE_TIMER_PUSH(t_codegen);
 574                 arch_code_generator_before_sched(birg->cg);
 575                 BE_TIMER_POP(t_codegen);
 576
 577                 /* schedule the irg */
 578                 BE_TIMER_PUSH(t_sched);
 579                 switch (be_options.scheduler) {
 580                         default:
 581                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 582                         case BE_SCHED_LIST:
 583                                 list_sched(birg, &be_options);
 584                                 break;
 585 #ifdef WITH_ILP
 586                         case BE_SCHED_ILP:
 587                                 be_ilp_sched(birg);
 588                                 fprintf(stderr, "Warning: ILP scheduler not yet fully implemented, falling back to list scheduler.\n");
 589                                 list_sched(birg, &be_options);
 590                                 break;
 591 #endif /* WITH_ILP */
 592                 };
 593                 BE_TIMER_POP(t_sched);
 594
 595                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 596
 597                 /* check schedule */
 598                 BE_TIMER_PUSH(t_verify);
 599                 be_sched_vrfy(irg, be_options.vrfy_option);
 600                 BE_TIMER_POP(t_verify);
 601
 602                 be_do_stat_nodes(irg, "04 Schedule");
 603
 604                 /* introduce patterns to assure constraints */
 605                 BE_TIMER_PUSH(t_constr);
 606                 /* we switch off optimizations here, because they might cause trouble */
 607                 save_optimization_state(&state);
 608                 set_optimize(0);
 609                 set_opt_normalize(0);
 610
 611                 /* add Keeps for should_be_different constrained nodes  */
 612                 /* beware: needs schedule due to usage of be_ssa_constr */
 613                 assure_constraints(birg);
 614                 BE_TIMER_POP(t_constr);
 615
 616                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 617                 be_do_stat_nodes(irg, "05 Constraints");
 618
 619                 /* connect all stack modifying nodes together (see beabi.c) */
 620                 BE_TIMER_PUSH(t_abi);
 621                 be_abi_fix_stack_nodes(birg->abi, NULL);
 622                 BE_TIMER_POP(t_abi);
 623
 624                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 625
 626                 /* check schedule */
 627                 BE_TIMER_PUSH(t_verify);
 628                 be_sched_vrfy(irg, be_options.vrfy_option);
 629                 BE_TIMER_POP(t_verify);
 630
 631                 /* do some statistics */
 632                 be_do_stat_reg_pressure(birg);
 633
 634                 /* stuff needs to be done after scheduling but before register allocation */
 635                 BE_TIMER_PUSH(t_codegen);
 636                 arch_code_generator_before_ra(birg->cg);
 637                 BE_TIMER_POP(t_codegen);
 638
 639                 /* Do register allocation */
 640                 BE_TIMER_PUSH(t_regalloc);
 641                 ra_timer = ra->allocate(birg);
 642                 BE_TIMER_POP(t_regalloc);
 643
 644                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 645                 be_do_stat_nodes(irg, "06 Register Allocation");
 646
 647                 /* let the code generator prepare the graph for emitter */
 648                 BE_TIMER_PUSH(t_finish);
 649                 arch_code_generator_after_ra(birg->cg);
 650                 BE_TIMER_POP(t_finish);
 651
 652                 /* fix stack offsets */
 653                 BE_TIMER_PUSH(t_abi);
 654                 be_abi_fix_stack_nodes(birg->abi, NULL);
 655                 be_remove_dead_nodes_from_schedule(irg);
 656                 be_abi_fix_stack_bias(birg->abi);
 657                 BE_TIMER_POP(t_abi);
 658
 659                 BE_TIMER_PUSH(t_finish);
 660                 arch_code_generator_finish(birg->cg);
 661                 BE_TIMER_POP(t_finish);
 662
 663                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 664
 665                 /* check schedule and register allocation */
 666                 BE_TIMER_PUSH(t_verify);
 667                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 668                         //irg_verify(irg, VRFY_ENFORCE_SSA);
 669                         be_check_dominance(irg);
 670                         be_verify_out_edges(irg);
 671                         be_verify_schedule(irg);
 672                         be_verify_register_allocation(env.arch_env, irg);
 673                 }
 674                 else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 675                         //assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 676                         assert(be_verify_out_edges(irg));
 677                         assert(be_check_dominance(irg) && "Dominance verification failed");
 678                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 679                         assert(be_verify_register_allocation(env.arch_env, irg)
 680                                && "register allocation verification failed");
 681                 }
 682                 BE_TIMER_POP(t_verify);
 683
 684                 /* emit assembler code */
 685                 BE_TIMER_PUSH(t_emit);
 686                 arch_code_generator_done(birg->cg);
 687                 BE_TIMER_POP(t_emit);
 688
 689                 dump(DUMP_FINAL, irg, "-end", dump_ir_extblock_graph_sched);
 690
 691                 BE_TIMER_PUSH(t_abi);
 692                 be_abi_free(birg->abi);
 693                 BE_TIMER_POP(t_abi);
 694
 695                 be_do_stat_nodes(irg, "07 Final");
 696                 restore_optimization_state(&state);
 697
 698                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 699                 BE_TIMER_POP(t_other);
 700
 701 #define LC_EMIT(timer)  \
 702         printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 703         be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer));
 704
 705 #define LC_EMIT_RA(timer) \
 706         printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 707         be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer));
 708                 BE_TIMER_ONLY(
 709                         printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 710                         printf("# nodes at begin:  %u\n", num_nodes_b);
 711                         printf("# nodes before ra: %u\n", num_nodes_r);
 712                         printf("# nodes at end:    %u\n\n", num_nodes_a);
 713                         LC_EMIT(t_abi);
 714                         LC_EMIT(t_codegen);
 715                         LC_EMIT(t_sched);
 716                         LC_EMIT(t_constr);
 717                         LC_EMIT(t_regalloc);
 718                         LC_EMIT_RA(ra_timer->t_prolog);
 719                         LC_EMIT_RA(ra_timer->t_live);
 720                         LC_EMIT_RA(ra_timer->t_spill);
 721                         LC_EMIT_RA(ra_timer->t_spillslots);
 722                         LC_EMIT_RA(ra_timer->t_color);
 723                         LC_EMIT_RA(ra_timer->t_ifg);
 724                         LC_EMIT_RA(ra_timer->t_copymin);
 725                         LC_EMIT_RA(ra_timer->t_ssa);
 726                         LC_EMIT_RA(ra_timer->t_epilog);
 727                         LC_EMIT_RA(ra_timer->t_verify);
 728                         LC_EMIT_RA(ra_timer->t_other);
 729                         LC_EMIT(t_finish);
 730                         LC_EMIT(t_emit);
 731                         LC_EMIT(t_verify);
 732                         LC_EMIT(t_other);
 733                 );
 734 #undef LC_EMIT_RA
 735 #undef LC_EMIT
 736
 737                 free_execfreq(birg->execfreqs);
 738
 739         /* switched off due to statistics (statistic module needs all irgs) */
 740                 if (! stat_is_active())
 741                         free_ir_graph(irg);
 742
 743                 be_close_stat_file();
 744         }
 745         be_profile_free();
 746         be_done_env(&env);
 747
 748 #undef BE_TIMER_POP
 749 #undef BE_TIMER_PUSH
 750 #undef BE_TIMER_ONLY
 751 }
 752
 753 /* Main interface to the frontend. */
 754 void be_main(FILE *file_handle, const char *cup_name)
 755 {
 756 #ifdef WITH_LIBCORE
 757         lc_timer_t *t = NULL;
 758
 759         /* The user specified another config file to read. do that now. */
 760         if(strlen(config_file) > 0) {
 761                 FILE *f;
 762
 763                 if((f = fopen(config_file, "rt")) != NULL) {
 764                         lc_opt_from_file(config_file, f, NULL);
 765                         fclose(f);
 766                 }
 767         }
 768
 769         if (be_options.timing == BE_TIME_ON) {
 770                 t = lc_timer_register("bemain", "measure complete bemain loop");
 771
 772                 if (lc_timer_enter_high_priority()) {
 773                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 774                 }
 775
 776                 lc_timer_reset_and_start(t);
 777         }
 778 #endif /* WITH_LIBCORE */
 779
 780         /* never build code for pseudo irgs */
 781         set_visit_pseudo_irgs(0);
 782
 783         be_node_init();
 784         be_main_loop(file_handle, cup_name);
 785
 786 #ifdef WITH_LIBCORE
 787         if (be_options.timing == BE_TIME_ON) {
 788                 lc_timer_stop(t);
 789                 lc_timer_leave_high_priority();
 790                 printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 791         }
 792 #endif /* WITH_LIBCORE */
 793 }
 794
 795 /** The debug info retriever function. */
 796 static retrieve_dbg_func retrieve_dbg = NULL;
 797
 798 /* Sets a debug info retriever. */
 799 void be_set_debug_retrieve(retrieve_dbg_func func) {
 800         retrieve_dbg = func;
 801 }
 802
 803 /* Retrieve the debug info. */
 804 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 805         if (retrieve_dbg)
 806                 return retrieve_dbg(dbg, line);
 807
 808         *line = 0;
 809         return NULL;
 810 }
 811
 812 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 813 {
 814         if(bs == NULL)
 815                 bs = bitset_alloca(cls->n_regs);
 816         else
 817                 bitset_clear_all(bs);
 818
 819         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 820         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 821         bitset_flip_all(bs);
 822         be_abi_put_ignore_regs(birg->abi, cls, bs);
 823
 824         return bitset_popcnt(bs);
 825 }