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  * @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 "obst.h"
  35 #include "bitset.h"
  36
  37 #include "irprog.h"
  38 #include "irgopt.h"
  39 #include "irgraph.h"
  40 #include "irdump.h"
  41 #include "phiclass.h"
  42 #include "irdom_t.h"
  43 #include "iredges_t.h"
  44 #include "irloop_t.h"
  45 #include "irtools.h"
  46 #include "irvrfy.h"
  47 #include "irprintf.h"
  48 #include "firmstat.h"
  49 #include "execfreq.h"
  50
  51 #include "bearch_t.h"
  52 #include "be_t.h"
  53 #include "bemodule.h"
  54 #include "beutil.h"
  55 #include "benode_t.h"
  56 #include "beirgmod.h"
  57 #include "besched_t.h"
  58 #include "belistsched.h"
  59 #include "belive_t.h"
  60 #include "bespillbelady.h"
  61 #include "bera.h"
  62 #include "bechordal_t.h"
  63 #include "beifg.h"
  64 #include "beifg_impl.h"
  65 #include "becopyopt.h"
  66 #include "becopystat.h"
  67 #include "bessadestr.h"
  68 #include "beabi.h"
  69 #include "belower.h"
  70 #include "beschedmris.h"
  71 #include "bestat.h"
  72 #include "beverify.h"
  73 #include "beprofile.h"
  74 #include "be_dbgout.h"
  75 #include "beirg_t.h"
  76
  77 #ifdef WITH_ILP
  78 #include "beilpsched.h"
  79 #endif /* WITH_ILP */
  80
  81 /* options visible for anyone */
  82 static be_options_t be_options = {
  83         DUMP_NONE,                         /* dump flags */
  84         BE_TIME_OFF,                       /* no timing */
  85         0,                                 /* no opt profile */
  86         0,                                 /* try to omit frame pointer */
  87         0,                                 /* no stabs debugging output */
  88         BE_VRFY_WARN,                      /* verification level: warn */
  89         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  90         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  91         "cplex",                           /* ilp solver */
  92         0,                                 /* enable statistic event dumping */
  93 };
  94
  95 /* config file. */
  96 static char config_file[256] = { 0 };
  97
  98 /* back end instruction set architecture to use */
  99 static const arch_isa_if_t *isa_if = NULL;
 100
 101 #ifdef WITH_LIBCORE
 102 #include <libcore/lc_opts.h>
 103 #include <libcore/lc_opts_enum.h>
 104 #include <libcore/lc_timing.h>
 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_BOOL     ("omitfp",   "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_BOOL     ("statev",   "dump statistic events",                               &be_options.statev),
 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         LC_OPT_LAST
 165 };
 166 #endif /* WITH_LIBCORE */
 167
 168 static be_module_list_entry_t *isa_ifs = NULL;
 169
 170 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 171 {
 172         if(isa_if == NULL)
 173                 isa_if = isa;
 174
 175         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 176 }
 177
 178 void be_opt_register(void)
 179 {
 180         lc_opt_entry_t *be_grp;
 181         static int run_once = 0;
 182
 183         if (run_once) {
 184                 return;
 185         }
 186         run_once     = 1;
 187
 188         be_init_modules();
 189
 190 #ifdef WITH_LIBCORE
 191         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 192         lc_opt_add_table(be_grp, be_main_options);
 193
 194         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 195                                &isa_ifs, (void**) &isa_if);
 196 #endif
 197 }
 198
 199 /* Parse one argument. */
 200 int be_parse_arg(const char *arg) {
 201 #ifdef WITH_LIBCORE
 202         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 203         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 204                 lc_opt_print_help(be_grp, stdout);
 205                 return -1;
 206         }
 207         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 208 #else
 209         return 0;
 210 #endif
 211 }
 212
 213 /** The be parameters returned by default, all off. */
 214 static const backend_params be_params = {
 215         0,    /* need dword lowering */
 216         0,    /* don't support inlien assembler yet */
 217         NULL, /* no additional opcodes */
 218         NULL, /* will be set later */
 219         NULL, /* but yet no creator function */
 220         NULL, /* context for create_intrinsic_fkt */
 221         NULL, /* no if conversion settings */
 222 };
 223
 224 /* Perform schedule verification if requested. */
 225 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 226         if (vrfy_opt == BE_VRFY_WARN) {
 227                 be_verify_schedule(birg);
 228         }
 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         obstack_init(&env->obst);
 255         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 256         env->options  = &be_options;
 257
 258         arch_env_init(env->arch_env, isa_if, file_handle, env);
 259
 260         /* Register the irn handler of the architecture */
 261         if (arch_isa_get_irn_handler(env->arch_env->isa))
 262                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 263
 264         /*
 265          * Register the node handler of the back end infrastructure.
 266          * This irn handler takes care of the platform independent
 267          * spill, reload and perm nodes.
 268          */
 269         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 270         env->phi_handler = be_phi_handler_new(env->arch_env);
 271         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 272
 273         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 274         return env;
 275 }
 276
 277 static void be_done_env(be_main_env_t *env)
 278 {
 279         env->arch_env->isa->impl->done(env->arch_env->isa);
 280         be_dbg_close(env->db_handle);
 281         be_phi_handler_free(env->phi_handler);
 282         obstack_free(&env->obst, NULL);
 283 }
 284
 285 /**
 286  * A wrapper around a firm dumper. Dumps only, if
 287  * flags are enabled.
 288  *
 289  * @param mask    a bitmask containing the reason what will be dumped
 290  * @param irg     the IR graph to dump
 291  * @param suffix  the suffix for the dumper
 292  * @param dumper  the dumper to be called
 293  */
 294 static void dump(int mask, ir_graph *irg, const char *suffix,
 295                  void (*dumper)(ir_graph *, const char *))
 296 {
 297         if(be_options.dump_flags & mask)
 298                 be_dump(irg, suffix, dumper);
 299 }
 300
 301 /**
 302  * Prepare a backend graph for code generation and initialize its birg
 303  */
 304 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 305 {
 306         memset(birg, 0, sizeof(*birg));
 307         birg->irg = irg;
 308         birg->main_env = env;
 309
 310         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 311         edges_activate_kind(irg, EDGE_KIND_DEP);
 312
 313         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 314
 315         be_stat_init_irg(env->arch_env, irg);
 316         be_do_stat_nodes(irg, "01 Begin");
 317
 318         /* set the current graph (this is important for several firm functions) */
 319         current_ir_graph = irg;
 320
 321         /* Normalize proj nodes. */
 322         normalize_proj_nodes(irg);
 323
 324         /* we do this before critical edge split. As this produces less returns,
 325            because sometimes (= 164.gzip) multiple returns are slower */
 326         normalize_n_returns(irg);
 327
 328         /* Remove critical edges */
 329         remove_critical_cf_edges(irg);
 330
 331         /* Ensure, that the ir_edges are computed. */
 332         edges_assure(irg);
 333
 334         /* reset the phi handler. */
 335         be_phi_handler_reset(env->phi_handler);
 336
 337         set_irg_phase_state(irg, phase_backend);
 338
 339         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 340 }
 341
 342 #define BE_TIMER_PUSH(timer)                                                        \
 343         if (be_options.timing == BE_TIME_ON) {                                          \
 344                 int res = lc_timer_push(timer);                                             \
 345                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 346                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 347                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 348                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 349                                 lc_timer_get_name(timer));                                          \
 350         }
 351 #define BE_TIMER_POP(timer)                                                                    \
 352         if (be_options.timing == BE_TIME_ON) {                                                     \
 353                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 354                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 355                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 356                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 357                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 358                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 359                 timer = tmp;                                                                           \
 360         }
 361
 362 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 363
 364 /**
 365  * The Firm backend main loop.
 366  * Do architecture specific lowering for all graphs
 367  * and call the architecture specific code generator.
 368  *
 369  * @param file_handle   the file handle the output will be written to
 370  * @param cup_name      name of the compilation unit
 371  */
 372 static void be_main_loop(FILE *file_handle, const char *cup_name)
 373 {
 374         int i;
 375         arch_isa_t *isa;
 376         be_main_env_t env;
 377         unsigned num_nodes_b = 0;
 378         unsigned num_nodes_a = 0;
 379         unsigned num_nodes_r = 0;
 380         char prof_filename[256];
 381         static const char suffix[] = ".prof";
 382         be_irg_t *birgs;
 383         int num_birgs;
 384         ir_graph **irg_list, **backend_irg_list;
 385
 386         lc_timer_t *t_abi      = NULL;
 387         lc_timer_t *t_codegen  = NULL;
 388         lc_timer_t *t_sched    = NULL;
 389         lc_timer_t *t_constr   = NULL;
 390         lc_timer_t *t_regalloc = NULL;
 391         lc_timer_t *t_finish   = NULL;
 392         lc_timer_t *t_emit     = NULL;
 393         lc_timer_t *t_other    = NULL;
 394         lc_timer_t *t_verify   = NULL;
 395
 396         if (be_options.timing == BE_TIME_ON) {
 397                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 398                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 399                 t_sched    = lc_timer_register("sched",    "scheduling");
 400                 t_constr   = lc_timer_register("constr",   "assure constraints");
 401                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 402                 t_finish   = lc_timer_register("finish",   "graph finish");
 403                 t_emit     = lc_timer_register("emiter",   "code emiter");
 404                 t_verify   = lc_timer_register("verify",   "graph verification");
 405                 t_other    = lc_timer_register("other",    "other");
 406         }
 407
 408         be_init_env(&env, file_handle);
 409
 410         isa = arch_env_get_isa(env.arch_env);
 411
 412         be_dbg_so(env.db_handle, cup_name);
 413         be_dbg_types(env.db_handle);
 414
 415         /* backend may provide an ordered list of irgs where code should be generated for */
 416         irg_list         = NEW_ARR_F(ir_graph *, 0);
 417         backend_irg_list = arch_isa_get_backend_irg_list(isa, &irg_list);
 418
 419         /* we might need 1 birg more for instrumentation constructor */
 420         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 421         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 422
 423         /* First: initialize all birgs */
 424         for(i = 0; i < num_birgs; ++i) {
 425                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 426                 initialize_birg(&birgs[i], irg, &env);
 427         }
 428         DEL_ARR_F(irg_list);
 429
 430         /*
 431                 Get the filename for the profiling data.
 432                 Beware: '\0' is already included in sizeof(suffix)
 433         */
 434         memset(prof_filename, 0, sizeof(prof_filename));
 435         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 436         strcat(prof_filename, suffix);
 437
 438         /*
 439                 Next: Either instruments all irgs with profiling code
 440                 or try to read in profile data for current translation unit.
 441         */
 442         if (be_options.opt_profile) {
 443                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 444                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 445                 num_birgs++;
 446                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 447         } else {
 448                 be_profile_read(prof_filename);
 449         }
 450
 451         /* For all graphs */
 452         for (i = 0; i < num_birgs; ++i) {
 453                 be_irg_t *birg = &birgs[i];
 454                 ir_graph *irg  = birg->irg;
 455                 optimization_state_t state;
 456                 const arch_code_generator_if_t *cg_if;
 457
 458                 /* set the current graph (this is important for several firm functions) */
 459                 current_ir_graph = irg;
 460
 461 #ifdef FIRM_STATISTICS
 462                 stat_ev_ctx_push_fobj("irg", irg);
 463 #endif
 464
 465                 /* stop and reset timers */
 466                 BE_TIMER_ONLY(
 467                         LC_STOP_AND_RESET_TIMER(t_abi);
 468                         LC_STOP_AND_RESET_TIMER(t_codegen);
 469                         LC_STOP_AND_RESET_TIMER(t_sched);
 470                         LC_STOP_AND_RESET_TIMER(t_constr);
 471                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 472                         LC_STOP_AND_RESET_TIMER(t_finish);
 473                         LC_STOP_AND_RESET_TIMER(t_emit);
 474                         LC_STOP_AND_RESET_TIMER(t_verify);
 475                         LC_STOP_AND_RESET_TIMER(t_other);
 476                 );
 477                 BE_TIMER_PUSH(t_other);   /* t_other */
 478
 479                 /* Verify the initial graph */
 480                 BE_TIMER_PUSH(t_verify);
 481                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 482                         irg_verify(irg, VRFY_ENFORCE_SSA);
 483                         be_check_dominance(irg);
 484                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 485                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 486                         assert(be_check_dominance(irg) && "Dominance verification failed");
 487                 }
 488                 BE_TIMER_POP(t_verify);
 489
 490                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 491
 492                 /* Get the code generator interface. */
 493                 cg_if = isa->impl->get_code_generator_if(isa);
 494
 495                 /* get a code generator for this graph. */
 496                 birg->cg = cg_if->init(birg);
 497
 498                 /* some transformations need to be done before abi introduce */
 499                 arch_code_generator_before_abi(birg->cg);
 500
 501                 /* reset the phi handler. */
 502                 be_phi_handler_reset(env.phi_handler);
 503
 504                 /* implement the ABI conventions. */
 505                 BE_TIMER_PUSH(t_abi);
 506                 birg->abi = be_abi_introduce(birg);
 507                 BE_TIMER_POP(t_abi);
 508
 509                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 510                 be_do_stat_nodes(irg, "02 Abi");
 511
 512                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 513                         be_check_dominance(irg);
 514                         be_verify_out_edges(irg);
 515                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 516                         assert(be_verify_out_edges(irg));
 517                         assert(be_check_dominance(irg) && "Dominance verification failed");
 518                 }
 519
 520                 /* generate code */
 521                 BE_TIMER_PUSH(t_codegen);
 522                 arch_code_generator_prepare_graph(birg->cg);
 523                 BE_TIMER_POP(t_codegen);
 524
 525                 be_do_stat_nodes(irg, "03 Prepare");
 526
 527                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 528                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 529
 530                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 531                         be_check_dominance(irg);
 532                         be_verify_out_edges(irg);
 533                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 534                         assert(be_verify_out_edges(irg));
 535                         assert(be_check_dominance(irg) && "Dominance verification failed");
 536                 }
 537
 538                 /**
 539                  * Create execution frequencies from profile data or estimate some
 540                  */
 541                 if (be_profile_has_data())
 542                         birg->exec_freq = be_create_execfreqs_from_profile(irg);
 543                 else
 544                         birg->exec_freq = compute_execfreq(irg, 10);
 545
 546
 547                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 548                 /* be_live_chk_compare(birg); */
 549
 550                 /* let backend prepare scheduling */
 551                 BE_TIMER_PUSH(t_codegen);
 552                 arch_code_generator_before_sched(birg->cg);
 553                 BE_TIMER_POP(t_codegen);
 554
 555                 /* schedule the irg */
 556                 BE_TIMER_PUSH(t_sched);
 557                 switch (be_options.scheduler) {
 558                         default:
 559                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 560                         case BE_SCHED_LIST:
 561                                 list_sched(birg, &be_options);
 562                                 break;
 563 #ifdef WITH_ILP
 564                         case BE_SCHED_ILP:
 565                                 be_ilp_sched(birg, &be_options);
 566                                 break;
 567 #endif /* WITH_ILP */
 568                 };
 569                 BE_TIMER_POP(t_sched);
 570
 571                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 572
 573                 /* check schedule */
 574                 BE_TIMER_PUSH(t_verify);
 575                 be_sched_vrfy(birg, be_options.vrfy_option);
 576                 BE_TIMER_POP(t_verify);
 577
 578                 be_do_stat_nodes(irg, "04 Schedule");
 579
 580                 /* introduce patterns to assure constraints */
 581                 BE_TIMER_PUSH(t_constr);
 582                 /* we switch off optimizations here, because they might cause trouble */
 583                 save_optimization_state(&state);
 584                 set_optimize(0);
 585                 set_opt_normalize(0);
 586
 587                 /* add Keeps for should_be_different constrained nodes  */
 588                 /* beware: needs schedule due to usage of be_ssa_constr */
 589                 assure_constraints(birg);
 590                 BE_TIMER_POP(t_constr);
 591
 592                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 593                 be_do_stat_nodes(irg, "05 Constraints");
 594
 595                 /* stuff needs to be done after scheduling but before register allocation */
 596                 BE_TIMER_PUSH(t_codegen);
 597                 arch_code_generator_before_ra(birg->cg);
 598                 BE_TIMER_POP(t_codegen);
 599
 600                 /* connect all stack modifying nodes together (see beabi.c) */
 601                 BE_TIMER_PUSH(t_abi);
 602                 be_abi_fix_stack_nodes(birg->abi);
 603                 BE_TIMER_POP(t_abi);
 604
 605                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 606
 607                 /* check schedule */
 608                 BE_TIMER_PUSH(t_verify);
 609                 be_sched_vrfy(birg, be_options.vrfy_option);
 610                 BE_TIMER_POP(t_verify);
 611
 612                 /* do some statistics */
 613                 be_do_stat_reg_pressure(birg);
 614
 615 #ifdef FIRM_STATISTICS
 616                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 617 #endif
 618
 619                 /* Do register allocation */
 620                 BE_TIMER_PUSH(t_regalloc);
 621                 be_allocate_registers(birg);
 622                 BE_TIMER_POP(t_regalloc);
 623
 624 #ifdef FIRM_STATISTICS
 625                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 626 #endif
 627
 628                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 629                 be_do_stat_nodes(irg, "06 Register Allocation");
 630
 631                 /* let the code generator prepare the graph for emitter */
 632                 BE_TIMER_PUSH(t_finish);
 633                 arch_code_generator_after_ra(birg->cg);
 634                 BE_TIMER_POP(t_finish);
 635
 636                 /* fix stack offsets */
 637                 BE_TIMER_PUSH(t_abi);
 638                 be_abi_fix_stack_nodes(birg->abi);
 639                 be_remove_dead_nodes_from_schedule(birg);
 640                 be_abi_fix_stack_bias(birg->abi);
 641                 BE_TIMER_POP(t_abi);
 642
 643                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 644
 645                 BE_TIMER_PUSH(t_finish);
 646                 arch_code_generator_finish(birg->cg);
 647                 BE_TIMER_POP(t_finish);
 648
 649                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 650
 651                 /* check schedule and register allocation */
 652                 BE_TIMER_PUSH(t_verify);
 653                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 654                         irg_verify(irg, VRFY_ENFORCE_SSA);
 655                         be_check_dominance(irg);
 656                         be_verify_out_edges(irg);
 657                         be_verify_schedule(birg);
 658                         be_verify_register_allocation(env.arch_env, irg);
 659                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 660                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 661                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 662                         assert(be_check_dominance(irg) && "Dominance verification failed");
 663                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 664                         assert(be_verify_register_allocation(env.arch_env, irg)
 665                                && "register allocation verification failed");
 666
 667                 }
 668                 BE_TIMER_POP(t_verify);
 669
 670                 /* emit assembler code */
 671                 BE_TIMER_PUSH(t_emit);
 672                 arch_code_generator_done(birg->cg);
 673                 BE_TIMER_POP(t_emit);
 674
 675                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 676
 677                 BE_TIMER_PUSH(t_abi);
 678                 be_abi_free(birg->abi);
 679                 BE_TIMER_POP(t_abi);
 680
 681                 be_do_stat_nodes(irg, "07 Final");
 682                 restore_optimization_state(&state);
 683
 684                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 685                 BE_TIMER_POP(t_other);
 686
 687 #define LC_EMIT(timer)  \
 688                 printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 689                 stat_ev_dbl(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer));
 690
 691 #define LC_EMIT_RA(timer) \
 692                 printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 693                 stat_ev_dbl(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 694
 695                 BE_TIMER_ONLY(
 696                         printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 697                         printf("# nodes at begin:  %u\n", num_nodes_b);
 698                         printf("# nodes before ra: %u\n", num_nodes_r);
 699                         printf("# nodes at end:    %u\n\n", num_nodes_a);
 700                         LC_EMIT(t_abi);
 701                         LC_EMIT(t_codegen);
 702                         LC_EMIT(t_sched);
 703                         LC_EMIT(t_constr);
 704                         LC_EMIT(t_regalloc);
 705                         if(global_ra_timer != NULL) {
 706                                 LC_EMIT_RA(global_ra_timer->t_prolog);
 707                                 LC_EMIT_RA(global_ra_timer->t_live);
 708                                 LC_EMIT_RA(global_ra_timer->t_spill);
 709                                 LC_EMIT_RA(global_ra_timer->t_spillslots);
 710                                 LC_EMIT_RA(global_ra_timer->t_color);
 711                                 LC_EMIT_RA(global_ra_timer->t_ifg);
 712                                 LC_EMIT_RA(global_ra_timer->t_copymin);
 713                                 LC_EMIT_RA(global_ra_timer->t_ssa);
 714                                 LC_EMIT_RA(global_ra_timer->t_epilog);
 715                                 LC_EMIT_RA(global_ra_timer->t_verify);
 716                                 LC_EMIT_RA(global_ra_timer->t_other);
 717                         }
 718                         LC_EMIT(t_finish);
 719                         LC_EMIT(t_emit);
 720                         LC_EMIT(t_verify);
 721                         LC_EMIT(t_other);
 722                 );
 723 #undef LC_EMIT_RA
 724 #undef LC_EMIT
 725
 726                 be_free_birg(birg);
 727
 728         /* switched off due to statistics (statistic module needs all irgs) */
 729 #if 0   /* STA needs irgs */
 730 #ifdef FIRM_STATISTICS
 731                 if (! stat_is_active())
 732 #endif /* FIRM_STATISTICS */
 733                         free_ir_graph(irg);
 734 #endif /* if 0 */
 735                 stat_ev_ctx_pop();
 736         }
 737         be_profile_free();
 738         be_done_env(&env);
 739
 740 #undef BE_TIMER_POP
 741 #undef BE_TIMER_PUSH
 742 #undef BE_TIMER_ONLY
 743 }
 744
 745 /* Main interface to the frontend. */
 746 void be_main(FILE *file_handle, const char *cup_name)
 747 {
 748         lc_timer_t *t = NULL;
 749
 750         /* The user specified another config file to read. do that now. */
 751         if(strlen(config_file) > 0) {
 752                 FILE *f;
 753
 754                 if((f = fopen(config_file, "rt")) != NULL) {
 755                         lc_opt_from_file(config_file, f, NULL);
 756                         fclose(f);
 757                 }
 758         }
 759
 760         if (be_options.timing == BE_TIME_ON) {
 761                 t = lc_timer_register("bemain", "measure complete bemain loop");
 762
 763                 if (lc_timer_enter_high_priority()) {
 764                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 765                 }
 766
 767                 lc_timer_reset_and_start(t);
 768         }
 769
 770         if (be_options.statev) {
 771                 const char *dot = strrchr(cup_name, '.');
 772                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 773                 char       *buf = alloca(pos - cup_name + 1);
 774                 strncpy(buf, cup_name, pos - cup_name);
 775
 776                 stat_ev_begin(buf);
 777         }
 778
 779         /* never build code for pseudo irgs */
 780         set_visit_pseudo_irgs(0);
 781
 782         be_node_init();
 783
 784         be_main_loop(file_handle, cup_name);
 785
 786         if (be_options.timing == BE_TIME_ON) {
 787                 lc_timer_stop(t);
 788                 lc_timer_leave_high_priority();
 789                 stat_ev_dbl("backend_time", lc_timer_elapsed_msec(t));
 790                 printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 791         }
 792
 793         if (be_options.statev)
 794                 stat_ev_end();
 795 }
 796
 797 /** The debug info retriever function. */
 798 static retrieve_dbg_func retrieve_dbg = NULL;
 799
 800 /* Sets a debug info retriever. */
 801 void be_set_debug_retrieve(retrieve_dbg_func func) {
 802         retrieve_dbg = func;
 803 }
 804
 805 /* Retrieve the debug info. */
 806 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 807         if (retrieve_dbg)
 808                 return retrieve_dbg(dbg, line);
 809
 810         *line = 0;
 811         return NULL;
 812 }
 813
 814 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 815 {
 816         if (bs == NULL)
 817                 bs = bitset_alloca(cls->n_regs);
 818         else
 819                 bitset_clear_all(bs);
 820
 821         assert(bitset_size(bs) == (unsigned)cls->n_regs);
 822         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 823         bitset_flip_all(bs);
 824         be_abi_put_ignore_regs(birg->abi, cls, bs);
 825
 826         return bitset_popcnt(bs);
 827 }