nsz Git - libfirm/blob - ir/be/bemain.c

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief       Main Backend driver.
  23  * @author      Sebastian Hack
  24  * @date        25.11.2004
  25  * @version     $Id$
  26  */
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include <stdarg.h>
  32 #include <stdio.h>
  33
  34 #include "lc_opts.h"
  35 #include "lc_opts_enum.h"
  36
  37 #include "obst.h"
  38 #include "bitset.h"
  39
  40 #include "irprog.h"
  41 #include "irgopt.h"
  42 #include "irgraph.h"
  43 #include "irdump.h"
  44 #include "phiclass.h"
  45 #include "irdom_t.h"
  46 #include "iredges_t.h"
  47 #include "irloop_t.h"
  48 #include "irtools.h"
  49 #include "irvrfy.h"
  50 #include "irprintf.h"
  51 #include "iroptimize.h"
  52 #include "firmstat.h"
  53 #include "execfreq.h"
  54 #include "irprofile.h"
  55
  56 #include "bearch_t.h"
  57 #include "be_t.h"
  58 #include "bemodule.h"
  59 #include "beutil.h"
  60 #include "benode_t.h"
  61 #include "beirgmod.h"
  62 #include "besched_t.h"
  63 #include "belistsched.h"
  64 #include "belive_t.h"
  65 #include "bera.h"
  66 #include "bechordal_t.h"
  67 #include "beifg.h"
  68 #include "beifg_impl.h"
  69 #include "becopyopt.h"
  70 #include "becopystat.h"
  71 #include "bessadestr.h"
  72 #include "beabi.h"
  73 #include "belower.h"
  74 #include "beschedmris.h"
  75 #include "bestat.h"
  76 #include "beverify.h"
  77 #include "be_dbgout.h"
  78 #include "beirg_t.h"
  79
  80 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
  81
  82 #ifdef WITH_ILP
  83 #include "beilpsched.h"
  84 #endif /* WITH_ILP */
  85
  86 /* options visible for anyone */
  87 static be_options_t be_options = {
  88         DUMP_NONE,                         /* dump flags */
  89         BE_TIME_OFF,                       /* no timing */
  90         0,                                 /* no opt profile */
  91         0,                                 /* try to omit frame pointer */
  92         0,                                 /* create PIC code */
  93         0,                                 /* create gprof compatible profiling code */
  94         BE_VRFY_WARN,                      /* verification level: warn */
  95         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  96         "linux",                           /* target OS name */
  97         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  98         "cplex",                           /* ilp solver */
  99         0,                                 /* enable statistic event dumping */
 100         "",                                /* print stat events */
 101 };
 102
 103 /* config file. */
 104 static char config_file[256] = { 0 };
 105
 106 /* back end instruction set architecture to use */
 107 static const arch_isa_if_t *isa_if = NULL;
 108
 109 /* possible dumping options */
 110 static const lc_opt_enum_mask_items_t dump_items[] = {
 111         { "none",       DUMP_NONE },
 112         { "initial",    DUMP_INITIAL },
 113         { "abi",        DUMP_ABI    },
 114         { "sched",      DUMP_SCHED  },
 115         { "prepared",   DUMP_PREPARED },
 116         { "regalloc",   DUMP_RA },
 117         { "final",      DUMP_FINAL },
 118         { "be",         DUMP_BE },
 119         { "all",        2 * DUMP_BE - 1 },
 120         { NULL,         0 }
 121 };
 122
 123 /* verify options. */
 124 static const lc_opt_enum_int_items_t vrfy_items[] = {
 125         { "off",    BE_VRFY_OFF    },
 126         { "warn",   BE_VRFY_WARN   },
 127         { "assert", BE_VRFY_ASSERT },
 128         { NULL,     0 }
 129 };
 130
 131 /* scheduling options. */
 132 static const lc_opt_enum_int_items_t sched_items[] = {
 133         { "list", BE_SCHED_LIST },
 134 #ifdef WITH_ILP
 135         { "ilp",  BE_SCHED_ILP  },
 136 #endif /* WITH_ILP */
 137         { NULL,   0 }
 138 };
 139
 140 static lc_opt_enum_mask_var_t dump_var = {
 141         &be_options.dump_flags, dump_items
 142 };
 143
 144 static lc_opt_enum_int_var_t vrfy_var = {
 145         &be_options.vrfy_option, vrfy_items
 146 };
 147
 148 static lc_opt_enum_int_var_t sched_var = {
 149         &be_options.scheduler, sched_items
 150 };
 151
 152 static const lc_opt_table_entry_t be_main_options[] = {
 153         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
 154         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
 155         LC_OPT_ENT_BOOL     ("omitfp",   "omit frame pointer",                                  &be_options.omit_fp),
 156         LC_OPT_ENT_BOOL     ("pic",      "create PIC code",                                     &be_options.pic),
 157         LC_OPT_ENT_BOOL     ("gprof",    "create gprof profiling code",                         &be_options.gprof),
 158         LC_OPT_ENT_ENUM_PTR ("vrfy",     "verify the backend irg",                              &vrfy_var),
 159         LC_OPT_ENT_BOOL     ("time",     "get backend timing statistics",                       &be_options.timing),
 160         LC_OPT_ENT_BOOL     ("profile",  "instrument the code for execution count profiling",   &be_options.opt_profile),
 161         LC_OPT_ENT_ENUM_PTR ("sched",    "select a scheduler",                                  &sched_var),
 162         LC_OPT_ENT_STR      ("os",       "specify target operating system",                     &be_options.target_os, sizeof(be_options.target_os)),
 163 #ifdef FIRM_STATISTICS
 164         LC_OPT_ENT_BOOL     ("statev",   "dump statistic events",                               &be_options.statev),
 165         LC_OPT_ENT_STR      ("filtev",   "filter for stat events (regex if support is active",  &be_options.filtev, sizeof(be_options.filtev)),
 166 #endif
 167
 168 #ifdef WITH_ILP
 169         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 170         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 171 #endif /* WITH_ILP */
 172         LC_OPT_LAST
 173 };
 174
 175 static be_module_list_entry_t *isa_ifs = NULL;
 176
 177 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 178 {
 179         if (isa_if == NULL)
 180                 isa_if = isa;
 181
 182         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 183 }
 184
 185 void be_opt_register(void)
 186 {
 187         lc_opt_entry_t *be_grp;
 188         static int run_once = 0;
 189
 190         if (run_once) {
 191                 return;
 192         }
 193         run_once     = 1;
 194
 195         be_init_modules();
 196
 197         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 198         lc_opt_add_table(be_grp, be_main_options);
 199
 200         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 201                                &isa_ifs, (void**) &isa_if);
 202 }
 203
 204 /* Parse one argument. */
 205 int be_parse_arg(const char *arg) {
 206         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 207         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 208                 lc_opt_print_help(be_grp, stdout);
 209                 return -1;
 210         }
 211         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 212 }
 213
 214 /** The be parameters returned by default, all off. */
 215 static const backend_params be_params = {
 216         0,    /* need dword lowering */
 217         0,    /* don't support inline assembler yet */
 218         0,     /* no immediate floating point mode. */
 219         NULL, /* no additional opcodes */
 220         NULL, /* will be set later */
 221         NULL, /* but yet no creator function */
 222         NULL, /* context for create_intrinsic_fkt */
 223         NULL, /* no if conversion settings */
 224         NULL   /* no immediate fp mode */
 225 };
 226
 227 /* Perform schedule verification if requested. */
 228 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 229         if (vrfy_opt == BE_VRFY_WARN) {
 230                 be_verify_schedule(birg);
 231         } else if (vrfy_opt == BE_VRFY_ASSERT) {
 232                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
 233         }
 234 }
 235
 236 /* Initialize the Firm backend. Must be run first in init_firm()! */
 237 void firm_be_init(void)
 238 {
 239         be_opt_register();
 240         be_init_modules();
 241 }
 242
 243 /* Returns the backend parameter */
 244 const backend_params *be_get_backend_param(void)
 245 {
 246         if (isa_if->get_params)
 247                 return isa_if->get_params();
 248         return &be_params;
 249 }
 250
 251 /**
 252  * Initializes the main environment for the backend.
 253  *
 254  * @param env          an empty environment
 255  * @param file_handle  the file handle where the output will be written to
 256  */
 257 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 258 {
 259         memset(env, 0, sizeof(*env));
 260         env->options              = &be_options;
 261         env->ent_trampoline_map   = pmap_create();
 262         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 263         env->ent_pic_symbol_map   = pmap_create();
 264         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 265
 266         remove_irp_type(env->pic_trampolines_type);
 267         remove_irp_type(env->pic_symbols_type);
 268         set_class_final(env->pic_trampolines_type, 1);
 269
 270         env->arch_env = arch_env_init(isa_if, file_handle, env);
 271
 272         be_phi_handler_new(env);
 273
 274         be_dbg_open();
 275         return env;
 276 }
 277
 278 /**
 279  * Called when the be_main_env_t can be destroyed.
 280  */
 281 static void be_done_env(be_main_env_t *env)
 282 {
 283         arch_env_done(env->arch_env);
 284         be_dbg_close();
 285         be_phi_handler_free();
 286
 287         pmap_destroy(env->ent_trampoline_map);
 288         pmap_destroy(env->ent_pic_symbol_map);
 289         free_type(env->pic_trampolines_type);
 290         free_type(env->pic_symbols_type);
 291 }
 292
 293 /**
 294  * A wrapper around a firm dumper. Dumps only, if
 295  * flags are enabled.
 296  *
 297  * @param mask    a bitmask containing the reason what will be dumped
 298  * @param irg     the IR graph to dump
 299  * @param suffix  the suffix for the dumper
 300  * @param dumper  the dumper to be called
 301  */
 302 static void dump(int mask, ir_graph *irg, const char *suffix,
 303                  void (*dumper)(ir_graph *, const char *))
 304 {
 305         if(be_options.dump_flags & mask)
 306                 be_dump(irg, suffix, dumper);
 307 }
 308
 309 /**
 310  * Prepare a backend graph for code generation and initialize its birg
 311  */
 312 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 313 {
 314         memset(birg, 0, sizeof(*birg));
 315         birg->irg = irg;
 316         birg->main_env = env;
 317
 318         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 319         edges_activate_kind(irg, EDGE_KIND_DEP);
 320
 321         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 322
 323         be_stat_init_irg(env->arch_env, irg);
 324         be_do_stat_nodes(irg, "01 Begin");
 325
 326         /* set the current graph (this is important for several firm functions) */
 327         current_ir_graph = irg;
 328
 329         /* Normalize proj nodes. */
 330         normalize_proj_nodes(irg);
 331
 332         /* we do this before critical edge split. As this produces less returns,
 333            because sometimes (= 164.gzip) multiple returns are slower */
 334         normalize_n_returns(irg);
 335
 336         /* Remove critical edges */
 337         remove_critical_cf_edges(irg);
 338
 339         /* Ensure, that the ir_edges are computed. */
 340         edges_assure(irg);
 341
 342         set_irg_phase_state(irg, phase_backend);
 343
 344         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 345 }
 346
 347 #define BE_TIMER_ONLY(code)   do { if (be_timing) { code; } } while(0)
 348
 349 int be_timing;
 350 ir_timer_t *t_abi;
 351 ir_timer_t *t_codegen;
 352 ir_timer_t *t_sched;
 353 ir_timer_t *t_constr;
 354 ir_timer_t *t_finish;
 355 ir_timer_t *t_emit;
 356 ir_timer_t *t_other;
 357 ir_timer_t *t_verify;
 358 ir_timer_t *t_heights;
 359 ir_timer_t *t_live;
 360 ir_timer_t *t_execfreq;
 361 ir_timer_t *t_ssa_constr;
 362 ir_timer_t *t_ra_constr;
 363 ir_timer_t *t_ra_prolog;
 364 ir_timer_t *t_ra_epilog;
 365 ir_timer_t *t_ra_spill;
 366 ir_timer_t *t_ra_spill_apply;
 367 ir_timer_t *t_ra_color;
 368 ir_timer_t *t_ra_ifg;
 369 ir_timer_t *t_ra_copymin;
 370 ir_timer_t *t_ra_ssa;
 371 ir_timer_t *t_ra_other;
 372
 373 /**
 374  * The Firm backend main loop.
 375  * Do architecture specific lowering for all graphs
 376  * and call the architecture specific code generator.
 377  *
 378  * @param file_handle   the file handle the output will be written to
 379  * @param cup_name      name of the compilation unit
 380  */
 381 static void be_main_loop(FILE *file_handle, const char *cup_name)
 382 {
 383         int i;
 384         be_main_env_t env;
 385         char prof_filename[256];
 386         static const char suffix[] = ".prof";
 387         be_irg_t *birgs;
 388         int num_birgs;
 389         ir_graph **irg_list, **backend_irg_list;
 390         arch_env_t *arch_env;
 391
 392         be_timing = (be_options.timing == BE_TIME_ON);
 393
 394         if (be_timing) {
 395                 t_abi        = ir_timer_register("time_beabi",       "be abi introduction");
 396                 t_codegen    = ir_timer_register("time_codegen",     "codegeneration");
 397                 t_sched      = ir_timer_register("time_sched",       "scheduling");
 398                 t_constr     = ir_timer_register("time_constr",      "assure constraints");
 399                 t_finish     = ir_timer_register("time_finish",      "graph finish");
 400                 t_emit       = ir_timer_register("time_emiter",      "code emiter");
 401                 t_verify     = ir_timer_register("time_verify",      "graph verification");
 402                 t_other      = ir_timer_register("time_other",       "other");
 403                 t_heights    = ir_timer_register("time_heights",     "heights");
 404                 t_live       = ir_timer_register("time_liveness",    "be liveness");
 405                 t_execfreq   = ir_timer_register("time_execfreq",    "execfreq");
 406                 t_ssa_constr = ir_timer_register("time_ssa_constr",  "ssa reconstruction");
 407                 t_ra_prolog  = ir_timer_register("time_ra_prolog",   "regalloc prolog");
 408                 t_ra_epilog  = ir_timer_register("time_ra_epilog",   "regalloc epilog");
 409                 t_ra_constr  = ir_timer_register("time_ra_constr",   "regalloc constraints");
 410                 t_ra_spill   = ir_timer_register("time_ra_spill",    "spiller");
 411                 t_ra_spill_apply
 412                         = ir_timer_register("time_ra_spill_apply", "apply spills");
 413                 t_ra_color   = ir_timer_register("time_ra_color",    "graph coloring");
 414                 t_ra_ifg     = ir_timer_register("time_ra_ifg",      "interference graph");
 415                 t_ra_copymin = ir_timer_register("time_ra_copymin",  "copy minimization");
 416                 t_ra_ssa     = ir_timer_register("time_ra_ssadestr", "ssa destruction");
 417                 t_ra_other   = ir_timer_register("time_ra_other",    "regalloc other");
 418         }
 419
 420         be_init_env(&env, file_handle);
 421         env.cup_name = cup_name;
 422
 423         be_dbg_so(cup_name);
 424         be_dbg_types();
 425
 426         arch_env = env.arch_env;
 427
 428         /* backend may provide an ordered list of irgs where code should be generated for */
 429         irg_list         = NEW_ARR_F(ir_graph *, 0);
 430         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 431
 432         /* we might need 1 birg more for instrumentation constructor */
 433         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 434         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 435
 436         /* First: initialize all birgs */
 437         for(i = 0; i < num_birgs; ++i) {
 438                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 439                 initialize_birg(&birgs[i], irg, &env);
 440         }
 441         DEL_ARR_F(irg_list);
 442
 443         /*
 444                 Get the filename for the profiling data.
 445                 Beware: '\0' is already included in sizeof(suffix)
 446         */
 447         memset(prof_filename, 0, sizeof(prof_filename));
 448         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 449         strcat(prof_filename, suffix);
 450
 451         /*
 452                 Next: Either instruments all irgs with profiling code
 453                 or try to read in profile data for current translation unit.
 454         */
 455         if (be_options.opt_profile) {
 456                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 457                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 458                 num_birgs++;
 459         } else {
 460                 ir_profile_read(prof_filename);
 461         }
 462
 463         /* For all graphs */
 464         for (i = 0; i < num_birgs; ++i) {
 465                 be_irg_t *birg = &birgs[i];
 466                 ir_graph *irg  = birg->irg;
 467                 optimization_state_t state;
 468                 const arch_code_generator_if_t *cg_if;
 469
 470                 /* set the current graph (this is important for several firm functions) */
 471                 current_ir_graph = irg;
 472
 473 #if 0
 474                 {
 475                         unsigned percent = 100*i/num_birgs;
 476                         ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
 477                 }
 478 #endif
 479                 be_sched_init_phase(irg);
 480
 481                 /* reset the phi handler. */
 482                 be_phi_handler_reset();
 483
 484                 stat_ev_ctx_push_fobj("bemain_irg", irg);
 485
 486                 /* stop and reset timers */
 487                 BE_TIMER_PUSH(t_other);   /* t_other */
 488
 489                 /* Verify the initial graph */
 490                 BE_TIMER_PUSH(t_verify);
 491                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 492                         irg_verify(irg, VRFY_ENFORCE_SSA);
 493                         be_check_dominance(irg);
 494                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 495                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 496                         assert(be_check_dominance(irg) && "Dominance verification failed");
 497                 }
 498                 BE_TIMER_POP(t_verify);
 499
 500                 /* Get the code generator interface. */
 501                 cg_if = arch_env_get_code_generator_if(arch_env);
 502
 503                 /* get a code generator for this graph. */
 504                 birg->cg = cg_if->init(birg);
 505
 506                 /* some transformations need to be done before abi introduce */
 507                 arch_code_generator_before_abi(birg->cg);
 508
 509                 /* implement the ABI conventions. */
 510                 BE_TIMER_PUSH(t_abi);
 511                 birg->abi = be_abi_introduce(birg);
 512                 BE_TIMER_POP(t_abi);
 513
 514                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 515                 be_do_stat_nodes(irg, "02 Abi");
 516
 517                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 518                         be_check_dominance(irg);
 519                         be_verify_out_edges(irg);
 520                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 521                         assert(be_verify_out_edges(irg));
 522                         assert(be_check_dominance(irg) && "Dominance verification failed");
 523                 }
 524
 525                 /* generate code */
 526                 stat_ev_ctx_push_str("bemain_phase", "prepare");
 527                 BE_TIMER_PUSH(t_codegen);
 528                 arch_code_generator_prepare_graph(birg->cg);
 529                 BE_TIMER_POP(t_codegen);
 530                 stat_ev_ctx_pop("bemain_phase");
 531
 532                 /* reset the phi handler. */
 533                 be_phi_handler_reset();
 534
 535                 be_do_stat_nodes(irg, "03 Prepare");
 536
 537                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 538
 539                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 540                         be_check_dominance(irg);
 541                         be_verify_out_edges(irg);
 542                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 543                         assert(be_verify_out_edges(irg));
 544                         assert(be_check_dominance(irg) && "Dominance verification failed");
 545                 }
 546
 547                 BE_TIMER_PUSH(t_execfreq);
 548                 /**
 549                  * Create execution frequencies from profile data or estimate some
 550                  */
 551                 if (ir_profile_has_data())
 552                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 553                 else
 554                         birg->exec_freq = compute_execfreq(irg, 10);
 555                 BE_TIMER_POP(t_execfreq);
 556
 557
 558                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 559                 /* be_live_chk_compare(birg); */
 560
 561                 /* let backend prepare scheduling */
 562                 stat_ev_ctx_push_str("bemain_phase", "before_sched");
 563                 BE_TIMER_PUSH(t_codegen);
 564                 arch_code_generator_before_sched(birg->cg);
 565                 BE_TIMER_POP(t_codegen);
 566                 stat_ev_ctx_pop("bemain_phase");
 567
 568                 /* schedule the irg */
 569                 BE_TIMER_PUSH(t_sched);
 570                 switch (be_options.scheduler) {
 571                         default:
 572                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 573                         case BE_SCHED_LIST:
 574                                 list_sched(birg, &be_options);
 575                                 break;
 576 #ifdef WITH_ILP
 577                         case BE_SCHED_ILP:
 578                                 be_ilp_sched(birg, &be_options);
 579                                 break;
 580 #endif /* WITH_ILP */
 581                 };
 582                 BE_TIMER_POP(t_sched);
 583
 584                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 585
 586                 /* check schedule */
 587                 BE_TIMER_PUSH(t_verify);
 588                 be_sched_vrfy(birg, be_options.vrfy_option);
 589                 BE_TIMER_POP(t_verify);
 590
 591                 be_do_stat_nodes(irg, "04 Schedule");
 592
 593                 /* introduce patterns to assure constraints */
 594                 BE_TIMER_PUSH(t_constr);
 595                 /* we switch off optimizations here, because they might cause trouble */
 596                 save_optimization_state(&state);
 597                 set_optimize(0);
 598                 set_opt_normalize(0);
 599                 set_opt_cse(0);
 600
 601                 assert(!get_opt_cse());
 602
 603                 /* add Keeps for should_be_different constrained nodes  */
 604                 /* beware: needs schedule due to usage of be_ssa_constr */
 605                 assure_constraints(birg);
 606                 BE_TIMER_POP(t_constr);
 607
 608                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 609                 be_do_stat_nodes(irg, "05 Constraints");
 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                 /* connect all stack modifying nodes together (see beabi.c) */
 617                 BE_TIMER_PUSH(t_abi);
 618                 be_abi_fix_stack_nodes(birg->abi);
 619                 BE_TIMER_POP(t_abi);
 620
 621                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 622
 623                 /* check schedule */
 624                 BE_TIMER_PUSH(t_verify);
 625                 be_sched_vrfy(birg, be_options.vrfy_option);
 626                 BE_TIMER_POP(t_verify);
 627
 628                 /* do some statistics */
 629                 //be_do_stat_reg_pressure(birg);
 630
 631 #ifdef FIRM_STATISTICS
 632                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 633 #endif
 634
 635                 /* Do register allocation */
 636                 be_allocate_registers(birg);
 637
 638 #ifdef FIRM_STATISTICS
 639                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 640 #endif
 641
 642                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 643                 be_do_stat_nodes(irg, "06 Register Allocation");
 644
 645                 /* let the code generator prepare the graph for emitter */
 646                 BE_TIMER_PUSH(t_finish);
 647                 arch_code_generator_after_ra(birg->cg);
 648                 BE_TIMER_POP(t_finish);
 649
 650                 /* fix stack offsets */
 651                 BE_TIMER_PUSH(t_abi);
 652                 be_abi_fix_stack_nodes(birg->abi);
 653                 be_remove_dead_nodes_from_schedule(birg);
 654                 be_abi_fix_stack_bias(birg->abi);
 655                 BE_TIMER_POP(t_abi);
 656
 657                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 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(birg);
 672                         be_verify_register_allocation(birg);
 673                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 674                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 675                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 676                         assert(be_check_dominance(irg) && "Dominance verification failed");
 677                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 678                         assert(be_verify_register_allocation(birg)
 679                                && "register allocation verification failed");
 680
 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_block_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_POP(t_other);
 699
 700 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
 701
 702 #define LC_EMIT(timer)  \
 703                 stat_ev_if {    \
 704                         stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer));  \
 705                 } else { \
 706                         printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
 707                 } \
 708                 STOP_AND_RESET_TIMER(timer);
 709
 710                 BE_TIMER_ONLY(
 711                         stat_ev_if {
 712                         } else {
 713                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 714                         }
 715                         LC_EMIT(t_abi);
 716                         LC_EMIT(t_codegen);
 717                         LC_EMIT(t_sched);
 718                         LC_EMIT(t_live);
 719                         LC_EMIT(t_heights);
 720                         LC_EMIT(t_ssa_constr);
 721                         LC_EMIT(t_constr);
 722                         LC_EMIT(t_execfreq);
 723                         LC_EMIT(t_ra_prolog);
 724                         LC_EMIT(t_ra_spill);
 725                         LC_EMIT(t_ra_spill_apply);
 726                         LC_EMIT(t_ra_constr);
 727                         LC_EMIT(t_ra_color);
 728                         LC_EMIT(t_ra_ifg);
 729                         LC_EMIT(t_ra_copymin);
 730                         LC_EMIT(t_ra_ssa);
 731                         LC_EMIT(t_ra_epilog);
 732                         LC_EMIT(t_ra_other);
 733                         LC_EMIT(t_finish);
 734                         LC_EMIT(t_emit);
 735                         LC_EMIT(t_verify);
 736                         LC_EMIT(t_other);
 737                 );
 738 #undef LC_EMIT
 739
 740                 be_sched_free_phase(irg);
 741
 742                 be_free_birg(birg);
 743
 744         /* switched off due to statistics (statistic module needs all irgs) */
 745 #if 0   /* STA needs irgs */
 746 #ifdef FIRM_STATISTICS
 747                 if (! stat_is_active())
 748 #endif /* FIRM_STATISTICS */
 749                         free_ir_graph(irg);
 750 #endif /* if 0 */
 751                 stat_ev_ctx_pop("bemain_irg");
 752         }
 753         ir_profile_free();
 754         be_done_env(&env);
 755 }
 756
 757 /* Main interface to the frontend. */
 758 void be_main(FILE *file_handle, const char *cup_name)
 759 {
 760         ir_timer_t *t = NULL;
 761
 762         /* The user specified another config file to read. do that now. */
 763         if(strlen(config_file) > 0) {
 764                 FILE *f;
 765
 766                 if((f = fopen(config_file, "rt")) != NULL) {
 767                         lc_opt_from_file(config_file, f, NULL);
 768                         fclose(f);
 769                 }
 770         }
 771
 772         if (be_options.timing == BE_TIME_ON) {
 773                 t = ir_timer_register("bemain", "measure complete bemain loop");
 774
 775                 if (ir_timer_enter_high_priority()) {
 776                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 777                 }
 778
 779                 ir_timer_reset_and_start(t);
 780         }
 781
 782 #ifdef FIRM_STATISTICS
 783         if (be_options.statev) {
 784                 const char *dot = strrchr(cup_name, '.');
 785                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 786                 char       *buf = alloca(pos - cup_name + 1);
 787                 strncpy(buf, cup_name, pos - cup_name);
 788                 buf[pos - cup_name] = '\0';
 789
 790                 be_options.statev = 1;
 791                 stat_ev_begin(buf, be_options.filtev);
 792         }
 793 #endif
 794
 795         /* never build code for pseudo irgs */
 796         set_visit_pseudo_irgs(0);
 797
 798         be_node_init();
 799
 800         be_main_loop(file_handle, cup_name);
 801
 802         if (be_options.timing == BE_TIME_ON) {
 803                 ir_timer_stop(t);
 804                 ir_timer_leave_high_priority();
 805                 stat_ev_if {
 806                         stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
 807                 } else {
 808                         printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
 809                 }
 810         }
 811
 812 #ifdef FIRM_STATISTICS
 813         if (be_options.statev)
 814                 stat_ev_end();
 815 #endif
 816 }
 817
 818 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 819 {
 820         if (bs == NULL)
 821                 bs = bitset_alloca(cls->n_regs);
 822         else
 823                 bitset_clear_all(bs);
 824
 825         assert(bitset_size(bs) == (unsigned)cls->n_regs);
 826         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 827         bitset_flip_all(bs);
 828         be_abi_put_ignore_regs(birg->abi, cls, bs);
 829
 830         return bitset_popcnt(bs);
 831 }