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 inlien assembler yet */
 218         NULL, /* no additional opcodes */
 219         NULL, /* will be set later */
 220         NULL, /* but yet no creator function */
 221         NULL, /* context for create_intrinsic_fkt */
 222         NULL, /* no if conversion settings */
 223 };
 224
 225 /* Perform schedule verification if requested. */
 226 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 227         if (vrfy_opt == BE_VRFY_WARN) {
 228                 be_verify_schedule(birg);
 229         } else if (vrfy_opt == BE_VRFY_ASSERT) {
 230                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
 231         }
 232 }
 233
 234 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 235 const backend_params *be_init(void)
 236 {
 237         be_opt_register();
 238         be_init_modules();
 239
 240         if (isa_if->get_params)
 241                 return isa_if->get_params();
 242         return &be_params;
 243 }
 244
 245 /**
 246  * Initializes the main environment for the backend.
 247  *
 248  * @param env          an empty environment
 249  * @param file_handle  the file handle where the output will be written to
 250  */
 251 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 252 {
 253         memset(env, 0, sizeof(*env));
 254         env->options              = &be_options;
 255         env->ent_trampoline_map   = pmap_create();
 256         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 257         env->ent_pic_symbol_map   = pmap_create();
 258         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 259
 260         remove_irp_type(env->pic_trampolines_type);
 261         remove_irp_type(env->pic_symbols_type);
 262         set_class_final(env->pic_trampolines_type, 1);
 263
 264         env->arch_env = arch_env_init(isa_if, file_handle, env);
 265
 266         be_phi_handler_new(env);
 267
 268         be_dbg_open();
 269         return env;
 270 }
 271
 272 /**
 273  * Called when the be_main_env_t can be destroyed.
 274  */
 275 static void be_done_env(be_main_env_t *env)
 276 {
 277         arch_env_done(env->arch_env);
 278         be_dbg_close();
 279         be_phi_handler_free();
 280
 281         pmap_destroy(env->ent_trampoline_map);
 282         pmap_destroy(env->ent_pic_symbol_map);
 283         free_type(env->pic_trampolines_type);
 284         free_type(env->pic_symbols_type);
 285 }
 286
 287 /**
 288  * A wrapper around a firm dumper. Dumps only, if
 289  * flags are enabled.
 290  *
 291  * @param mask    a bitmask containing the reason what will be dumped
 292  * @param irg     the IR graph to dump
 293  * @param suffix  the suffix for the dumper
 294  * @param dumper  the dumper to be called
 295  */
 296 static void dump(int mask, ir_graph *irg, const char *suffix,
 297                  void (*dumper)(ir_graph *, const char *))
 298 {
 299         if(be_options.dump_flags & mask)
 300                 be_dump(irg, suffix, dumper);
 301 }
 302
 303 /**
 304  * Prepare a backend graph for code generation and initialize its birg
 305  */
 306 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 307 {
 308         memset(birg, 0, sizeof(*birg));
 309         birg->irg = irg;
 310         birg->main_env = env;
 311
 312         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 313         edges_activate_kind(irg, EDGE_KIND_DEP);
 314
 315         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 316
 317         be_stat_init_irg(env->arch_env, irg);
 318         be_do_stat_nodes(irg, "01 Begin");
 319
 320         /* set the current graph (this is important for several firm functions) */
 321         current_ir_graph = irg;
 322
 323         /* Normalize proj nodes. */
 324         normalize_proj_nodes(irg);
 325
 326         /* we do this before critical edge split. As this produces less returns,
 327            because sometimes (= 164.gzip) multiple returns are slower */
 328         normalize_n_returns(irg);
 329
 330         /* Remove critical edges */
 331         remove_critical_cf_edges(irg);
 332
 333         /* Ensure, that the ir_edges are computed. */
 334         edges_assure(irg);
 335
 336         set_irg_phase_state(irg, phase_backend);
 337
 338         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 339 }
 340
 341 #define BE_TIMER_ONLY(code)   do { if (be_timing) { code; } } while(0)
 342
 343 int be_timing;
 344 ir_timer_t *t_abi;
 345 ir_timer_t *t_codegen;
 346 ir_timer_t *t_sched;
 347 ir_timer_t *t_constr;
 348 ir_timer_t *t_finish;
 349 ir_timer_t *t_emit;
 350 ir_timer_t *t_other;
 351 ir_timer_t *t_verify;
 352 ir_timer_t *t_heights;
 353 ir_timer_t *t_live;
 354 ir_timer_t *t_execfreq;
 355 ir_timer_t *t_ssa_constr;
 356 ir_timer_t *t_ra_constr;
 357 ir_timer_t *t_ra_prolog;
 358 ir_timer_t *t_ra_epilog;
 359 ir_timer_t *t_ra_spill;
 360 ir_timer_t *t_ra_spill_apply;
 361 ir_timer_t *t_ra_color;
 362 ir_timer_t *t_ra_ifg;
 363 ir_timer_t *t_ra_copymin;
 364 ir_timer_t *t_ra_ssa;
 365 ir_timer_t *t_ra_other;
 366
 367 /**
 368  * The Firm backend main loop.
 369  * Do architecture specific lowering for all graphs
 370  * and call the architecture specific code generator.
 371  *
 372  * @param file_handle   the file handle the output will be written to
 373  * @param cup_name      name of the compilation unit
 374  */
 375 static void be_main_loop(FILE *file_handle, const char *cup_name)
 376 {
 377         int i;
 378         be_main_env_t env;
 379         char prof_filename[256];
 380         static const char suffix[] = ".prof";
 381         be_irg_t *birgs;
 382         int num_birgs;
 383         ir_graph **irg_list, **backend_irg_list;
 384         arch_env_t *arch_env;
 385
 386         be_timing = (be_options.timing == BE_TIME_ON);
 387
 388         if (be_timing) {
 389                 t_abi        = ir_timer_register("time_beabi",       "be abi introduction");
 390                 t_codegen    = ir_timer_register("time_codegen",     "codegeneration");
 391                 t_sched      = ir_timer_register("time_sched",       "scheduling");
 392                 t_constr     = ir_timer_register("time_constr",      "assure constraints");
 393                 t_finish     = ir_timer_register("time_finish",      "graph finish");
 394                 t_emit       = ir_timer_register("time_emiter",      "code emiter");
 395                 t_verify     = ir_timer_register("time_verify",      "graph verification");
 396                 t_other      = ir_timer_register("time_other",       "other");
 397                 t_heights    = ir_timer_register("time_heights",     "heights");
 398                 t_live       = ir_timer_register("time_liveness",    "be liveness");
 399                 t_execfreq   = ir_timer_register("time_execfreq",    "execfreq");
 400                 t_ssa_constr = ir_timer_register("time_ssa_constr",  "ssa reconstruction");
 401                 t_ra_prolog  = ir_timer_register("time_ra_prolog",   "regalloc prolog");
 402                 t_ra_epilog  = ir_timer_register("time_ra_epilog",   "regalloc epilog");
 403                 t_ra_constr  = ir_timer_register("time_ra_constr",   "regalloc constraints");
 404                 t_ra_spill   = ir_timer_register("time_ra_spill",    "spiller");
 405                 t_ra_spill_apply
 406                         = ir_timer_register("time_ra_spill_apply", "apply spills");
 407                 t_ra_color   = ir_timer_register("time_ra_color",    "graph coloring");
 408                 t_ra_ifg     = ir_timer_register("time_ra_ifg",      "interference graph");
 409                 t_ra_copymin = ir_timer_register("time_ra_copymin",  "copy minimization");
 410                 t_ra_ssa     = ir_timer_register("time_ra_ssadestr", "ssa destruction");
 411                 t_ra_other   = ir_timer_register("time_ra_other",    "regalloc other");
 412         }
 413
 414         be_init_env(&env, file_handle);
 415         env.cup_name = cup_name;
 416
 417         be_dbg_so(cup_name);
 418         be_dbg_types();
 419
 420         arch_env = env.arch_env;
 421
 422         /* backend may provide an ordered list of irgs where code should be generated for */
 423         irg_list         = NEW_ARR_F(ir_graph *, 0);
 424         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 425
 426         /* we might need 1 birg more for instrumentation constructor */
 427         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 428         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 429
 430         /* First: initialize all birgs */
 431         for(i = 0; i < num_birgs; ++i) {
 432                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 433                 initialize_birg(&birgs[i], irg, &env);
 434         }
 435         DEL_ARR_F(irg_list);
 436
 437         /*
 438                 Get the filename for the profiling data.
 439                 Beware: '\0' is already included in sizeof(suffix)
 440         */
 441         memset(prof_filename, 0, sizeof(prof_filename));
 442         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 443         strcat(prof_filename, suffix);
 444
 445         /*
 446                 Next: Either instruments all irgs with profiling code
 447                 or try to read in profile data for current translation unit.
 448         */
 449         if (be_options.opt_profile) {
 450                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 451                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 452                 num_birgs++;
 453         } else {
 454                 ir_profile_read(prof_filename);
 455         }
 456
 457         /* For all graphs */
 458         for (i = 0; i < num_birgs; ++i) {
 459                 be_irg_t *birg = &birgs[i];
 460                 ir_graph *irg  = birg->irg;
 461                 optimization_state_t state;
 462                 const arch_code_generator_if_t *cg_if;
 463
 464                 /* set the current graph (this is important for several firm functions) */
 465                 current_ir_graph = irg;
 466
 467 #if 0
 468                 {
 469                         unsigned percent = 100*i/num_birgs;
 470                         ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
 471                 }
 472 #endif
 473                 be_sched_init_phase(irg);
 474
 475                 /* reset the phi handler. */
 476                 be_phi_handler_reset();
 477
 478                 stat_ev_ctx_push_fobj("bemain_irg", irg);
 479
 480                 /* stop and reset timers */
 481                 BE_TIMER_PUSH(t_other);   /* t_other */
 482
 483                 /* Verify the initial graph */
 484                 BE_TIMER_PUSH(t_verify);
 485                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 486                         irg_verify(irg, VRFY_ENFORCE_SSA);
 487                         be_check_dominance(irg);
 488                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 489                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 490                         assert(be_check_dominance(irg) && "Dominance verification failed");
 491                 }
 492                 BE_TIMER_POP(t_verify);
 493
 494                 /* Get the code generator interface. */
 495                 cg_if = arch_env_get_code_generator_if(arch_env);
 496
 497                 /* get a code generator for this graph. */
 498                 birg->cg = cg_if->init(birg);
 499
 500                 /* some transformations need to be done before abi introduce */
 501                 arch_code_generator_before_abi(birg->cg);
 502
 503                 /* implement the ABI conventions. */
 504                 BE_TIMER_PUSH(t_abi);
 505                 birg->abi = be_abi_introduce(birg);
 506                 BE_TIMER_POP(t_abi);
 507
 508                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 509                 be_do_stat_nodes(irg, "02 Abi");
 510
 511                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 512                         be_check_dominance(irg);
 513                         be_verify_out_edges(irg);
 514                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 515                         assert(be_verify_out_edges(irg));
 516                         assert(be_check_dominance(irg) && "Dominance verification failed");
 517                 }
 518
 519                 /* generate code */
 520                 stat_ev_ctx_push_str("bemain_phase", "prepare");
 521                 BE_TIMER_PUSH(t_codegen);
 522                 arch_code_generator_prepare_graph(birg->cg);
 523                 BE_TIMER_POP(t_codegen);
 524                 stat_ev_ctx_pop("bemain_phase");
 525
 526                 /* reset the phi handler. */
 527                 be_phi_handler_reset();
 528
 529                 be_do_stat_nodes(irg, "03 Prepare");
 530
 531                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 532
 533                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 534                         be_check_dominance(irg);
 535                         be_verify_out_edges(irg);
 536                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 537                         assert(be_verify_out_edges(irg));
 538                         assert(be_check_dominance(irg) && "Dominance verification failed");
 539                 }
 540
 541                 BE_TIMER_PUSH(t_execfreq);
 542                 /**
 543                  * Create execution frequencies from profile data or estimate some
 544                  */
 545                 if (ir_profile_has_data())
 546                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 547                 else
 548                         birg->exec_freq = compute_execfreq(irg, 10);
 549                 BE_TIMER_POP(t_execfreq);
 550
 551
 552                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 553                 /* be_live_chk_compare(birg); */
 554
 555                 /* let backend prepare scheduling */
 556                 stat_ev_ctx_push_str("bemain_phase", "before_sched");
 557                 BE_TIMER_PUSH(t_codegen);
 558                 arch_code_generator_before_sched(birg->cg);
 559                 BE_TIMER_POP(t_codegen);
 560                 stat_ev_ctx_pop("bemain_phase");
 561
 562                 /* schedule the irg */
 563                 BE_TIMER_PUSH(t_sched);
 564                 switch (be_options.scheduler) {
 565                         default:
 566                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 567                         case BE_SCHED_LIST:
 568                                 list_sched(birg, &be_options);
 569                                 break;
 570 #ifdef WITH_ILP
 571                         case BE_SCHED_ILP:
 572                                 be_ilp_sched(birg, &be_options);
 573                                 break;
 574 #endif /* WITH_ILP */
 575                 };
 576                 BE_TIMER_POP(t_sched);
 577
 578                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 579
 580                 /* check schedule */
 581                 BE_TIMER_PUSH(t_verify);
 582                 be_sched_vrfy(birg, be_options.vrfy_option);
 583                 BE_TIMER_POP(t_verify);
 584
 585                 be_do_stat_nodes(irg, "04 Schedule");
 586
 587                 /* introduce patterns to assure constraints */
 588                 BE_TIMER_PUSH(t_constr);
 589                 /* we switch off optimizations here, because they might cause trouble */
 590                 save_optimization_state(&state);
 591                 set_optimize(0);
 592                 set_opt_normalize(0);
 593                 set_opt_cse(0);
 594
 595                 assert(!get_opt_cse());
 596
 597                 /* add Keeps for should_be_different constrained nodes  */
 598                 /* beware: needs schedule due to usage of be_ssa_constr */
 599                 assure_constraints(birg);
 600                 BE_TIMER_POP(t_constr);
 601
 602                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 603                 be_do_stat_nodes(irg, "05 Constraints");
 604
 605                 /* stuff needs to be done after scheduling but before register allocation */
 606                 BE_TIMER_PUSH(t_codegen);
 607                 arch_code_generator_before_ra(birg->cg);
 608                 BE_TIMER_POP(t_codegen);
 609
 610                 /* connect all stack modifying nodes together (see beabi.c) */
 611                 BE_TIMER_PUSH(t_abi);
 612                 be_abi_fix_stack_nodes(birg->abi);
 613                 BE_TIMER_POP(t_abi);
 614
 615                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 616
 617                 /* check schedule */
 618                 BE_TIMER_PUSH(t_verify);
 619                 be_sched_vrfy(birg, be_options.vrfy_option);
 620                 BE_TIMER_POP(t_verify);
 621
 622                 /* do some statistics */
 623                 //be_do_stat_reg_pressure(birg);
 624
 625 #ifdef FIRM_STATISTICS
 626                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 627 #endif
 628
 629                 /* Do register allocation */
 630                 be_allocate_registers(birg);
 631
 632 #ifdef FIRM_STATISTICS
 633                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 634 #endif
 635
 636                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 637                 be_do_stat_nodes(irg, "06 Register Allocation");
 638
 639                 /* let the code generator prepare the graph for emitter */
 640                 BE_TIMER_PUSH(t_finish);
 641                 arch_code_generator_after_ra(birg->cg);
 642                 BE_TIMER_POP(t_finish);
 643
 644                 /* fix stack offsets */
 645                 BE_TIMER_PUSH(t_abi);
 646                 be_abi_fix_stack_nodes(birg->abi);
 647                 be_remove_dead_nodes_from_schedule(birg);
 648                 be_abi_fix_stack_bias(birg->abi);
 649                 BE_TIMER_POP(t_abi);
 650
 651                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 652
 653                 BE_TIMER_PUSH(t_finish);
 654                 arch_code_generator_finish(birg->cg);
 655                 BE_TIMER_POP(t_finish);
 656
 657                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 658
 659                 /* check schedule and register allocation */
 660                 BE_TIMER_PUSH(t_verify);
 661                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 662                         irg_verify(irg, VRFY_ENFORCE_SSA);
 663                         be_check_dominance(irg);
 664                         be_verify_out_edges(irg);
 665                         be_verify_schedule(birg);
 666                         be_verify_register_allocation(birg);
 667                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 668                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 669                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 670                         assert(be_check_dominance(irg) && "Dominance verification failed");
 671                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 672                         assert(be_verify_register_allocation(birg)
 673                                && "register allocation verification failed");
 674
 675                 }
 676                 BE_TIMER_POP(t_verify);
 677
 678                 /* emit assembler code */
 679                 BE_TIMER_PUSH(t_emit);
 680                 arch_code_generator_done(birg->cg);
 681                 BE_TIMER_POP(t_emit);
 682
 683                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 684
 685                 BE_TIMER_PUSH(t_abi);
 686                 be_abi_free(birg->abi);
 687                 BE_TIMER_POP(t_abi);
 688
 689                 be_do_stat_nodes(irg, "07 Final");
 690                 restore_optimization_state(&state);
 691
 692                 BE_TIMER_POP(t_other);
 693
 694 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
 695
 696 #define LC_EMIT(timer)  \
 697                 stat_ev_if {    \
 698                         stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer));  \
 699                 } else { \
 700                         printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
 701                 } \
 702                 STOP_AND_RESET_TIMER(timer);
 703
 704                 BE_TIMER_ONLY(
 705                         stat_ev_if {
 706                         } else {
 707                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 708                         }
 709                         LC_EMIT(t_abi);
 710                         LC_EMIT(t_codegen);
 711                         LC_EMIT(t_sched);
 712                         LC_EMIT(t_live);
 713                         LC_EMIT(t_heights);
 714                         LC_EMIT(t_ssa_constr);
 715                         LC_EMIT(t_constr);
 716                         LC_EMIT(t_execfreq);
 717                         LC_EMIT(t_ra_prolog);
 718                         LC_EMIT(t_ra_spill);
 719                         LC_EMIT(t_ra_spill_apply);
 720                         LC_EMIT(t_ra_constr);
 721                         LC_EMIT(t_ra_color);
 722                         LC_EMIT(t_ra_ifg);
 723                         LC_EMIT(t_ra_copymin);
 724                         LC_EMIT(t_ra_ssa);
 725                         LC_EMIT(t_ra_epilog);
 726                         LC_EMIT(t_ra_other);
 727                         LC_EMIT(t_finish);
 728                         LC_EMIT(t_emit);
 729                         LC_EMIT(t_verify);
 730                         LC_EMIT(t_other);
 731                 );
 732 #undef LC_EMIT
 733
 734                 be_sched_free_phase(irg);
 735
 736                 be_free_birg(birg);
 737
 738         /* switched off due to statistics (statistic module needs all irgs) */
 739 #if 0   /* STA needs irgs */
 740 #ifdef FIRM_STATISTICS
 741                 if (! stat_is_active())
 742 #endif /* FIRM_STATISTICS */
 743                         free_ir_graph(irg);
 744 #endif /* if 0 */
 745                 stat_ev_ctx_pop("bemain_irg");
 746         }
 747         ir_profile_free();
 748         be_done_env(&env);
 749 }
 750
 751 /* Main interface to the frontend. */
 752 void be_main(FILE *file_handle, const char *cup_name)
 753 {
 754         ir_timer_t *t = NULL;
 755
 756         /* The user specified another config file to read. do that now. */
 757         if(strlen(config_file) > 0) {
 758                 FILE *f;
 759
 760                 if((f = fopen(config_file, "rt")) != NULL) {
 761                         lc_opt_from_file(config_file, f, NULL);
 762                         fclose(f);
 763                 }
 764         }
 765
 766         if (be_options.timing == BE_TIME_ON) {
 767                 t = ir_timer_register("bemain", "measure complete bemain loop");
 768
 769                 if (ir_timer_enter_high_priority()) {
 770                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 771                 }
 772
 773                 ir_timer_reset_and_start(t);
 774         }
 775
 776 #ifdef FIRM_STATISTICS
 777         if (be_options.statev) {
 778                 const char *dot = strrchr(cup_name, '.');
 779                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 780                 char       *buf = alloca(pos - cup_name + 1);
 781                 strncpy(buf, cup_name, pos - cup_name);
 782                 buf[pos - cup_name] = '\0';
 783
 784                 be_options.statev = 1;
 785                 stat_ev_begin(buf, be_options.filtev);
 786         }
 787 #endif
 788
 789         /* never build code for pseudo irgs */
 790         set_visit_pseudo_irgs(0);
 791
 792         be_node_init();
 793
 794         be_main_loop(file_handle, cup_name);
 795
 796         if (be_options.timing == BE_TIME_ON) {
 797                 ir_timer_stop(t);
 798                 ir_timer_leave_high_priority();
 799                 stat_ev_if {
 800                         stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
 801                 } else {
 802                         printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
 803                 }
 804         }
 805
 806 #ifdef FIRM_STATISTICS
 807         if (be_options.statev)
 808                 stat_ev_end();
 809 #endif
 810 }
 811
 812 unsigned 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 }