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