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

   1 /*
   2  * Copyright (C) 1995-2007 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  * Backend driver.
  22  * @author Sebastian Hack
  23  * @date   25.11.2004
  24  * @cvsid  $Id$
  25  */
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include <stdarg.h>
  31 #include <stdio.h>
  32
  33 #include <libcore/lc_opts.h>
  34 #include <libcore/lc_opts_enum.h>
  35 #include <libcore/lc_timing.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 "return.h"
  52 #include "firmstat.h"
  53 #include "cfopt.h"
  54 #include "execfreq.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 "bespillbelady.h"
  66 #include "bera.h"
  67 #include "beraextern.h"
  68 #include "bechordal_t.h"
  69 #include "beifg.h"
  70 #include "beifg_impl.h"
  71 #include "becopyopt.h"
  72 #include "becopystat.h"
  73 #include "bessadestr.h"
  74 #include "beabi.h"
  75 #include "belower.h"
  76 #include "beschedmris.h"
  77 #include "bestat.h"
  78 #include "beverify.h"
  79 #include "beprofile.h"
  80 #include "be_dbgout.h"
  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         1,                                 /* try to omit frame pointer */
  92         0,                                 /* no stabs debugging output */
  93         BE_VRFY_WARN,                      /* verification level: warn */
  94         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  95         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  96         "cplex",                           /* ilp solver */
  97         "",                                /* filename for statistic output */
  98 };
  99
 100 /* config file. */
 101 static char config_file[256] = { 0 };
 102
 103 /* back end instruction set architecture to use */
 104 static const arch_isa_if_t *isa_if = NULL;
 105
 106 /* possible dumping options */
 107 static const lc_opt_enum_mask_items_t dump_items[] = {
 108         { "none",       DUMP_NONE },
 109         { "initial",    DUMP_INITIAL },
 110         { "abi",        DUMP_ABI    },
 111         { "sched",      DUMP_SCHED  },
 112         { "prepared",   DUMP_PREPARED },
 113         { "regalloc",   DUMP_RA },
 114         { "final",      DUMP_FINAL },
 115         { "be",         DUMP_BE },
 116         { "all",        2 * DUMP_BE - 1 },
 117         { NULL,         0 }
 118 };
 119
 120 /* verify options. */
 121 static const lc_opt_enum_int_items_t vrfy_items[] = {
 122         { "off",    BE_VRFY_OFF    },
 123         { "warn",   BE_VRFY_WARN   },
 124         { "assert", BE_VRFY_ASSERT },
 125         { NULL,     0 }
 126 };
 127
 128 /* scheduling options. */
 129 static const lc_opt_enum_int_items_t sched_items[] = {
 130         { "list", BE_SCHED_LIST },
 131 #ifdef WITH_ILP
 132         { "ilp",  BE_SCHED_ILP  },
 133 #endif /* WITH_ILP */
 134         { NULL,   0 }
 135 };
 136
 137 static lc_opt_enum_mask_var_t dump_var = {
 138         &be_options.dump_flags, dump_items
 139 };
 140
 141 static lc_opt_enum_int_var_t vrfy_var = {
 142         &be_options.vrfy_option, vrfy_items
 143 };
 144
 145 static lc_opt_enum_int_var_t sched_var = {
 146         &be_options.scheduler, sched_items
 147 };
 148
 149 static const lc_opt_table_entry_t be_main_options[] = {
 150         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
 151         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
 152         LC_OPT_ENT_NEGBOOL  ("noomitfp", "do not omit frame pointer",                           &be_options.omit_fp),
 153         LC_OPT_ENT_BOOL     ("stabs",    "enable stabs debug support",                          &be_options.stabs_debug_support),
 154         LC_OPT_ENT_ENUM_PTR ("vrfy",     "verify the backend irg",                              &vrfy_var),
 155         LC_OPT_ENT_BOOL     ("time",     "get backend timing statistics",                       &be_options.timing),
 156         LC_OPT_ENT_BOOL     ("profile",  "instrument the code for execution count profiling",   &be_options.opt_profile),
 157         LC_OPT_ENT_ENUM_PTR ("sched",    "select a scheduler",                                  &sched_var),
 158         LC_OPT_ENT_STR      ("statfile", "append statistics to file statfile", &be_options.stat_file_name, sizeof(be_options.stat_file_name)),
 159
 160 #ifdef WITH_ILP
 161         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 162         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 163 #endif /* WITH_ILP */
 164         { NULL }
 165 };
 166
 167 static be_module_list_entry_t *isa_ifs = NULL;
 168
 169 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 170 {
 171         if(isa_if == NULL)
 172                 isa_if = isa;
 173
 174         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 175 }
 176
 177 void be_opt_register(void)
 178 {
 179         lc_opt_entry_t *be_grp;
 180         static int run_once = 0;
 181
 182         if (run_once) {
 183                 return;
 184         }
 185         run_once     = 1;
 186
 187         be_init_modules();
 188
 189         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 190         lc_opt_add_table(be_grp, be_main_options);
 191
 192         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 193                                &isa_ifs, (void**) &isa_if);
 194 }
 195
 196 /* Parse one argument. */
 197 int be_parse_arg(const char *arg) {
 198         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 199         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 200                 lc_opt_print_help(be_grp, stdout);
 201                 return -1;
 202         }
 203         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 204 }
 205
 206 /** The be parameters returned by default, all off. */
 207 const static backend_params be_params = {
 208         NULL,
 209         NULL,
 210         0,
 211         NULL,
 212 };
 213
 214 /* Perform schedule verification if requested. */
 215 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 216         if (vrfy_opt == BE_VRFY_WARN) {
 217                 be_verify_schedule(birg);
 218         }
 219         else if (vrfy_opt == BE_VRFY_ASSERT) {
 220                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
 221         }
 222 }
 223
 224 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 225 const backend_params *be_init(void)
 226 {
 227         be_opt_register();
 228         be_init_modules();
 229
 230         if (isa_if->get_params)
 231                 return isa_if->get_params();
 232         return &be_params;
 233 }
 234
 235 /**
 236  * Initializes the main environment for the backend.
 237  *
 238  * @param env          an empty environment
 239  * @param file_handle  the file handle where the output will be written to
 240  */
 241 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 242 {
 243         memset(env, 0, sizeof(*env));
 244         obstack_init(&env->obst);
 245         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 246         env->options  = &be_options;
 247
 248         arch_env_init(env->arch_env, isa_if, file_handle, env);
 249
 250         /* Register the irn handler of the architecture */
 251         if (arch_isa_get_irn_handler(env->arch_env->isa))
 252                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 253
 254         /*
 255          * Register the node handler of the back end infrastructure.
 256          * This irn handler takes care of the platform independent
 257          * spill, reload and perm nodes.
 258          */
 259         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 260         env->phi_handler = be_phi_handler_new(env->arch_env);
 261         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 262
 263         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 264         return env;
 265 }
 266
 267 static void be_done_env(be_main_env_t *env)
 268 {
 269         env->arch_env->isa->impl->done(env->arch_env->isa);
 270         be_dbg_close(env->db_handle);
 271         be_phi_handler_free(env->phi_handler);
 272         obstack_free(&env->obst, NULL);
 273 }
 274
 275 /**
 276  * A wrapper around a firm dumper. Dumps only, if
 277  * flags are enabled.
 278  *
 279  * @param mask    a bitmask containing the reason what will be dumped
 280  * @param irg     the IR graph to dump
 281  * @param suffix  the suffix for the dumper
 282  * @param dumper  the dumper to be called
 283  */
 284 static void dump(int mask, ir_graph *irg, const char *suffix,
 285                  void (*dumper)(ir_graph *, const char *))
 286 {
 287         if(be_options.dump_flags & mask)
 288                 be_dump(irg, suffix, dumper);
 289 }
 290
 291 /**
 292  * Prepare a backend graph for code generation and initialize its birg
 293  */
 294 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 295 {
 296         memset(birg, 0, sizeof(*birg));
 297         birg->irg = irg;
 298         birg->main_env = env;
 299
 300         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 301         edges_activate_kind(irg, EDGE_KIND_DEP);
 302
 303         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 304
 305         be_stat_init_irg(env->arch_env, irg);
 306         be_do_stat_nodes(irg, "01 Begin");
 307
 308         /* set the current graph (this is important for several firm functions) */
 309         current_ir_graph = irg;
 310
 311         /* Normalize proj nodes. */
 312         normalize_proj_nodes(irg);
 313
 314         /* Make just one return node. */
 315         normalize_one_return(irg);
 316
 317         /* Remove critical edges */
 318         remove_critical_cf_edges(irg);
 319
 320         /* Ensure, that the ir_edges are computed. */
 321         edges_assure(irg);
 322
 323         /* reset the phi handler. */
 324         be_phi_handler_reset(env->phi_handler);
 325
 326         set_irg_phase_state(irg, phase_backend);
 327 }
 328
 329 #define BE_TIMER_PUSH(timer)                                                        \
 330         if (be_options.timing == BE_TIME_ON) {                                          \
 331                 int res = lc_timer_push(timer);                                             \
 332                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 333                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 334                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 335                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 336                                 lc_timer_get_name(timer));                                          \
 337         }
 338 #define BE_TIMER_POP(timer)                                                                    \
 339         if (be_options.timing == BE_TIME_ON) {                                                     \
 340                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 341                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 342                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 343                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 344                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 345                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 346                 timer = tmp;                                                                           \
 347         }
 348
 349 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 350
 351 /**
 352  * The Firm backend main loop.
 353  * Do architecture specific lowering for all graphs
 354  * and call the architecture specific code generator.
 355  *
 356  * @param file_handle   the file handle the output will be written to
 357  * @param cup_name      name of the compilation unit
 358  */
 359 static void be_main_loop(FILE *file_handle, const char *cup_name)
 360 {
 361         int i;
 362         arch_isa_t *isa;
 363         be_main_env_t env;
 364         unsigned num_nodes_b = 0;
 365         unsigned num_nodes_a = 0;
 366         unsigned num_nodes_r = 0;
 367         char prof_filename[256];
 368         static const char suffix[] = ".prof";
 369         be_irg_t *birgs;
 370         int num_birgs;
 371         ir_graph **irg_list, **backend_irg_list;
 372
 373         lc_timer_t *t_abi      = NULL;
 374         lc_timer_t *t_codegen  = NULL;
 375         lc_timer_t *t_sched    = NULL;
 376         lc_timer_t *t_constr   = NULL;
 377         lc_timer_t *t_regalloc = NULL;
 378         lc_timer_t *t_finish   = NULL;
 379         lc_timer_t *t_emit     = NULL;
 380         lc_timer_t *t_other    = NULL;
 381         lc_timer_t *t_verify   = NULL;
 382
 383         if (be_options.timing == BE_TIME_ON) {
 384                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 385                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 386                 t_sched    = lc_timer_register("sched",    "scheduling");
 387                 t_constr   = lc_timer_register("constr",   "assure constraints");
 388                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 389                 t_finish   = lc_timer_register("finish",   "graph finish");
 390                 t_emit     = lc_timer_register("emiter",   "code emiter");
 391                 t_verify   = lc_timer_register("verify",   "graph verification");
 392                 t_other    = lc_timer_register("other",    "other");
 393         }
 394
 395         be_init_env(&env, file_handle);
 396
 397         isa = arch_env_get_isa(env.arch_env);
 398
 399         be_dbg_so(env.db_handle, cup_name);
 400         be_dbg_types(env.db_handle);
 401
 402         /* backend may provide an ordered list of irgs where code should be generated for */
 403         irg_list         = NEW_ARR_F(ir_graph *, 0);
 404         backend_irg_list = arch_isa_get_backend_irg_list(isa, &irg_list);
 405
 406         /* we might need 1 birg more for instrumentation constructor */
 407         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 408         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 409
 410         /* First: initialize all birgs */
 411         for(i = 0; i < num_birgs; ++i) {
 412                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 413                 initialize_birg(&birgs[i], irg, &env);
 414         }
 415         DEL_ARR_F(irg_list);
 416
 417         /*
 418                 Get the filename for the profiling data.
 419                 Beware: '\0' is already included in sizeof(suffix)
 420         */
 421         memset(prof_filename, 0, sizeof(prof_filename));
 422         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 423         strcat(prof_filename, suffix);
 424
 425         /*
 426                 Next: Either instruments all irgs with profiling code
 427                 or try to read in profile data for current translation unit.
 428         */
 429         if (be_options.opt_profile) {
 430                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 431                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 432                 num_birgs++;
 433                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 434         } else {
 435                 be_profile_read(prof_filename);
 436         }
 437
 438         /* For all graphs */
 439         for (i = 0; i < num_birgs; ++i) {
 440                 be_irg_t *birg = &birgs[i];
 441                 ir_graph *irg  = birg->irg;
 442                 optimization_state_t state;
 443                 const arch_code_generator_if_t *cg_if;
 444                 char irg_name[128];
 445
 446                 /* set the current graph (this is important for several firm functions) */
 447                 current_ir_graph = irg;
 448
 449 #ifdef FIRM_STATISTICS
 450                 if(be_stat_ev_is_active()) {
 451                         ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
 452                         be_stat_tags[STAT_TAG_CLS] = "<all>";
 453                         be_stat_tags[STAT_TAG_IRG] = irg_name;
 454                         be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 455                 }
 456 #endif
 457
 458                 /* stop and reset timers */
 459                 BE_TIMER_ONLY(
 460                         LC_STOP_AND_RESET_TIMER(t_abi);
 461                         LC_STOP_AND_RESET_TIMER(t_codegen);
 462                         LC_STOP_AND_RESET_TIMER(t_sched);
 463                         LC_STOP_AND_RESET_TIMER(t_constr);
 464                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 465                         LC_STOP_AND_RESET_TIMER(t_finish);
 466                         LC_STOP_AND_RESET_TIMER(t_emit);
 467                         LC_STOP_AND_RESET_TIMER(t_verify);
 468                         LC_STOP_AND_RESET_TIMER(t_other);
 469                 );
 470                 BE_TIMER_PUSH(t_other);   /* t_other */
 471
 472                 /* Verify the initial graph */
 473                 BE_TIMER_PUSH(t_verify);
 474                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 475                         irg_verify(irg, VRFY_ENFORCE_SSA);
 476                         be_check_dominance(irg);
 477                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 478                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 479                         assert(be_check_dominance(irg) && "Dominance verification failed");
 480                 }
 481                 BE_TIMER_POP(t_verify);
 482
 483                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 484
 485                 /* Get the code generator interface. */
 486                 cg_if = isa->impl->get_code_generator_if(isa);
 487
 488                 /* get a code generator for this graph. */
 489                 birg->cg = cg_if->init(birg);
 490
 491                 /* some transformations need to be done before abi introduce */
 492                 arch_code_generator_before_abi(birg->cg);
 493
 494                 /* reset the phi handler. */
 495                 be_phi_handler_reset(env.phi_handler);
 496
 497                 /* implement the ABI conventions. */
 498                 BE_TIMER_PUSH(t_abi);
 499                 birg->abi = be_abi_introduce(birg);
 500                 BE_TIMER_POP(t_abi);
 501
 502                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 503                 be_do_stat_nodes(irg, "02 Abi");
 504
 505                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 506                         be_check_dominance(irg);
 507                         be_verify_out_edges(irg);
 508                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 509                         assert(be_verify_out_edges(irg));
 510                         assert(be_check_dominance(irg) && "Dominance verification failed");
 511                 }
 512
 513                 /* generate code */
 514                 BE_TIMER_PUSH(t_codegen);
 515                 arch_code_generator_prepare_graph(birg->cg);
 516                 BE_TIMER_POP(t_codegen);
 517
 518                 be_do_stat_nodes(irg, "03 Prepare");
 519
 520                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 521                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 522
 523                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 524                         be_check_dominance(irg);
 525                         be_verify_out_edges(irg);
 526                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 527                         assert(be_verify_out_edges(irg));
 528                         assert(be_check_dominance(irg) && "Dominance verification failed");
 529                 }
 530
 531                 /**
 532                  * Create execution frequencies from profile data or estimate some
 533                  */
 534                 if (be_profile_has_data()) {
 535                         birg->exec_freq = be_create_execfreqs_from_profile(irg);
 536                 } else {
 537                         birg->exec_freq = compute_execfreq(irg, 10);
 538                 }
 539
 540                 /* let backend prepare scheduling */
 541                 BE_TIMER_PUSH(t_codegen);
 542                 arch_code_generator_before_sched(birg->cg);
 543                 BE_TIMER_POP(t_codegen);
 544
 545                 /* schedule the irg */
 546                 BE_TIMER_PUSH(t_sched);
 547                 switch (be_options.scheduler) {
 548                         default:
 549                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 550                         case BE_SCHED_LIST:
 551                                 list_sched(birg, &be_options);
 552                                 break;
 553 #ifdef WITH_ILP
 554                         case BE_SCHED_ILP:
 555                                 be_ilp_sched(birg, &be_options);
 556                                 break;
 557 #endif /* WITH_ILP */
 558                 };
 559                 BE_TIMER_POP(t_sched);
 560
 561                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 562
 563                 /* check schedule */
 564                 BE_TIMER_PUSH(t_verify);
 565                 be_sched_vrfy(birg, be_options.vrfy_option);
 566                 BE_TIMER_POP(t_verify);
 567
 568                 be_do_stat_nodes(irg, "04 Schedule");
 569
 570                 /* introduce patterns to assure constraints */
 571                 BE_TIMER_PUSH(t_constr);
 572                 /* we switch off optimizations here, because they might cause trouble */
 573                 save_optimization_state(&state);
 574                 set_optimize(0);
 575                 set_opt_normalize(0);
 576
 577                 /* add Keeps for should_be_different constrained nodes  */
 578                 /* beware: needs schedule due to usage of be_ssa_constr */
 579                 assure_constraints(birg);
 580                 BE_TIMER_POP(t_constr);
 581
 582                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 583                 be_do_stat_nodes(irg, "05 Constraints");
 584
 585                 /* stuff needs to be done after scheduling but before register allocation */
 586                 BE_TIMER_PUSH(t_codegen);
 587                 arch_code_generator_before_ra(birg->cg);
 588                 BE_TIMER_POP(t_codegen);
 589
 590                 /* connect all stack modifying nodes together (see beabi.c) */
 591                 BE_TIMER_PUSH(t_abi);
 592                 be_abi_fix_stack_nodes(birg->abi);
 593                 BE_TIMER_POP(t_abi);
 594
 595                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 596
 597                 /* check schedule */
 598                 BE_TIMER_PUSH(t_verify);
 599                 be_sched_vrfy(birg, be_options.vrfy_option);
 600                 BE_TIMER_POP(t_verify);
 601
 602                 /* do some statistics */
 603                 be_do_stat_reg_pressure(birg);
 604
 605 #ifdef FIRM_STATISTICS
 606                 if(be_stat_ev_is_active()) {
 607                         be_stat_ev_l("costs_before_ra",
 608                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 609                 }
 610 #endif
 611
 612                 /* Do register allocation */
 613                 BE_TIMER_PUSH(t_regalloc);
 614                 be_allocate_registers(birg);
 615                 BE_TIMER_POP(t_regalloc);
 616
 617 #ifdef FIRM_STATISTICS
 618                 if(be_stat_ev_is_active()) {
 619                         be_stat_ev_l("costs_after_ra",
 620                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 621                 }
 622 #endif
 623
 624                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 625                 be_do_stat_nodes(irg, "06 Register Allocation");
 626
 627                 /* let the code generator prepare the graph for emitter */
 628                 BE_TIMER_PUSH(t_finish);
 629                 arch_code_generator_after_ra(birg->cg);
 630                 BE_TIMER_POP(t_finish);
 631
 632                 /* fix stack offsets */
 633                 BE_TIMER_PUSH(t_abi);
 634                 be_abi_fix_stack_nodes(birg->abi);
 635                 be_remove_dead_nodes_from_schedule(irg);
 636                 be_abi_fix_stack_bias(birg->abi);
 637                 BE_TIMER_POP(t_abi);
 638
 639                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 640
 641                 BE_TIMER_PUSH(t_finish);
 642                 arch_code_generator_finish(birg->cg);
 643                 BE_TIMER_POP(t_finish);
 644
 645                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 646
 647                 /* check schedule and register allocation */
 648                 BE_TIMER_PUSH(t_verify);
 649                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 650                         irg_verify(irg, VRFY_ENFORCE_SSA);
 651                         be_check_dominance(irg);
 652                         be_verify_out_edges(irg);
 653                         be_verify_schedule(birg);
 654                         be_verify_register_allocation(env.arch_env, irg);
 655                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 656                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 657                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 658                         assert(be_check_dominance(irg) && "Dominance verification failed");
 659                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 660                         assert(be_verify_register_allocation(env.arch_env, irg)
 661                                && "register allocation verification failed");
 662
 663                 }
 664                 BE_TIMER_POP(t_verify);
 665
 666                 /* emit assembler code */
 667                 BE_TIMER_PUSH(t_emit);
 668                 arch_code_generator_done(birg->cg);
 669                 BE_TIMER_POP(t_emit);
 670
 671                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 672
 673                 BE_TIMER_PUSH(t_abi);
 674                 be_abi_free(birg->abi);
 675                 BE_TIMER_POP(t_abi);
 676
 677                 be_do_stat_nodes(irg, "07 Final");
 678                 restore_optimization_state(&state);
 679
 680                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 681                 BE_TIMER_POP(t_other);
 682
 683 #define LC_EMIT(timer)  \
 684         if(!be_stat_ev_is_active()) { \
 685                 printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 686         } else { \
 687                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 688         }
 689 #define LC_EMIT_RA(timer) \
 690         if(!be_stat_ev_is_active()) { \
 691                 printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 692         } else { \
 693                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 694         }
 695                 BE_TIMER_ONLY(
 696                         if(!be_stat_ev_is_active()) {
 697                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 698                                 printf("# nodes at begin:  %u\n", num_nodes_b);
 699                                 printf("# nodes before ra: %u\n", num_nodes_r);
 700                                 printf("# nodes at end:    %u\n\n", num_nodes_a);
 701                         }
 702                         LC_EMIT(t_abi);
 703                         LC_EMIT(t_codegen);
 704                         LC_EMIT(t_sched);
 705                         LC_EMIT(t_constr);
 706                         LC_EMIT(t_regalloc);
 707                         if(global_ra_timer != NULL) {
 708                                 LC_EMIT_RA(global_ra_timer->t_prolog);
 709                                 LC_EMIT_RA(global_ra_timer->t_live);
 710                                 LC_EMIT_RA(global_ra_timer->t_spill);
 711                                 LC_EMIT_RA(global_ra_timer->t_spillslots);
 712                                 LC_EMIT_RA(global_ra_timer->t_color);
 713                                 LC_EMIT_RA(global_ra_timer->t_ifg);
 714                                 LC_EMIT_RA(global_ra_timer->t_copymin);
 715                                 LC_EMIT_RA(global_ra_timer->t_ssa);
 716                                 LC_EMIT_RA(global_ra_timer->t_epilog);
 717                                 LC_EMIT_RA(global_ra_timer->t_verify);
 718                                 LC_EMIT_RA(global_ra_timer->t_other);
 719                         }
 720                         LC_EMIT(t_finish);
 721                         LC_EMIT(t_emit);
 722                         LC_EMIT(t_verify);
 723                         LC_EMIT(t_other);
 724                 );
 725 #undef LC_EMIT_RA
 726 #undef LC_EMIT
 727
 728                 be_free_birg(birg);
 729
 730         /* switched off due to statistics (statistic module needs all irgs) */
 731 #if 0   /* STA needs irgs */
 732 #ifdef FIRM_STATISTICS
 733                 if (! stat_is_active())
 734 #endif /* FIRM_STATISTICS */
 735                         free_ir_graph(irg);
 736 #endif /* if 0 */
 737                 if(be_stat_ev_is_active()) {
 738                         be_stat_ev_pop();
 739                 }
 740         }
 741         be_profile_free();
 742         be_done_env(&env);
 743
 744 #undef BE_TIMER_POP
 745 #undef BE_TIMER_PUSH
 746 #undef BE_TIMER_ONLY
 747 }
 748
 749 /* Main interface to the frontend. */
 750 void be_main(FILE *file_handle, const char *cup_name)
 751 {
 752         lc_timer_t *t = NULL;
 753
 754         /* The user specified another config file to read. do that now. */
 755         if(strlen(config_file) > 0) {
 756                 FILE *f;
 757
 758                 if((f = fopen(config_file, "rt")) != NULL) {
 759                         lc_opt_from_file(config_file, f, NULL);
 760                         fclose(f);
 761                 }
 762         }
 763
 764         if (be_options.timing == BE_TIME_ON) {
 765                 t = lc_timer_register("bemain", "measure complete bemain loop");
 766
 767                 if (lc_timer_enter_high_priority()) {
 768                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 769                 }
 770
 771                 lc_timer_reset_and_start(t);
 772         }
 773
 774 #ifdef FIRM_STATISTICS
 775         be_init_stat_file(be_options.stat_file_name, cup_name);
 776 #endif
 777
 778         /* never build code for pseudo irgs */
 779         set_visit_pseudo_irgs(0);
 780
 781         be_node_init();
 782
 783         be_main_loop(file_handle, cup_name);
 784
 785         if (be_options.timing == BE_TIME_ON) {
 786                 lc_timer_stop(t);
 787                 lc_timer_leave_high_priority();
 788                 if(be_stat_ev_is_active()) {
 789                         be_stat_ev_l("backend_time", lc_timer_elapsed_msec(t));
 790                 } else {
 791                         printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 792                 }
 793         }
 794
 795 #ifdef FIRM_STATISTICS
 796         be_close_stat_file();
 797 #endif
 798 }
 799
 800 /** The debug info retriever function. */
 801 static retrieve_dbg_func retrieve_dbg = NULL;
 802
 803 /* Sets a debug info retriever. */
 804 void be_set_debug_retrieve(retrieve_dbg_func func) {
 805         retrieve_dbg = func;
 806 }
 807
 808 /* Retrieve the debug info. */
 809 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 810         if (retrieve_dbg)
 811                 return retrieve_dbg(dbg, line);
 812
 813         *line = 0;
 814         return NULL;
 815 }
 816
 817 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 818 {
 819         if(bs == NULL)
 820                 bs = bitset_alloca(cls->n_regs);
 821         else
 822                 bitset_clear_all(bs);
 823
 824         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 825         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 826         bitset_flip_all(bs);
 827         be_abi_put_ignore_regs(birg->abi, cls, bs);
 828
 829         return bitset_popcnt(bs);
 830 }