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

   1 /**
   2  * Backend driver.
   3  * @author Sebastian Hack
   4  * @date   25.11.2004
   5  * @cvsid  $Id$
   6  */
   7 #ifdef HAVE_CONFIG_H
   8 #include "config.h"
   9 #endif
  10
  11 #include <stdarg.h>
  12 #include <stdio.h>
  13
  14 #ifdef WITH_LIBCORE
  15 #include <libcore/lc_opts.h>
  16 #include <libcore/lc_opts_enum.h>
  17 #include <libcore/lc_timing.h>
  18 #endif /* WITH_LIBCORE */
  19
  20 #include "obst.h"
  21 #include "bitset.h"
  22
  23 #include "irprog.h"
  24 #include "irgopt.h"
  25 #include "irgraph.h"
  26 #include "irdump.h"
  27 #include "phiclass.h"
  28 #include "irdom_t.h"
  29 #include "iredges_t.h"
  30 #include "irloop_t.h"
  31 #include "irtools.h"
  32 #include "irvrfy.h"
  33 #include "irprintf.h"
  34 #include "return.h"
  35 #include "firmstat.h"
  36 #include "cfopt.h"
  37 #include "execfreq.h"
  38
  39 #include "bearch.h"
  40 #include "firm/bearch_firm.h"
  41 #include "ia32/bearch_ia32.h"
  42 #include "arm/bearch_arm.h"
  43 #include "ppc32/bearch_ppc32.h"
  44 #include "mips/bearch_mips.h"
  45
  46 #include "be_t.h"
  47 #include "bemodule.h"
  48 #include "beutil.h"
  49 #include "benode_t.h"
  50 #include "beirgmod.h"
  51 #include "besched_t.h"
  52 #include "belistsched.h"
  53 #include "belive_t.h"
  54 #include "bespillbelady.h"
  55 #include "bera.h"
  56 #include "beraextern.h"
  57 #include "bechordal_t.h"
  58 #include "beifg.h"
  59 #include "beifg_impl.h"
  60 #include "becopyopt.h"
  61 #include "becopystat.h"
  62 #include "bessadestr.h"
  63 #include "beabi.h"
  64 #include "belower.h"
  65 #include "beschedmris.h"
  66 #include "bestat.h"
  67 #include "beverify.h"
  68 #include "beprofile.h"
  69 #include "beblocksched.h"
  70 #include "be_dbgout.h"
  71
  72 #ifdef WITH_ILP
  73 #include "beilpsched.h"
  74 #endif /* WITH_ILP */
  75
  76 /* options visible for anyone */
  77 static be_options_t be_options = {
  78         DUMP_NONE,                         /* dump flags */
  79         BE_TIME_OFF,                       /* no timing */
  80         0,                                 /* no opt profile */
  81         1,                                 /* try to omit frame pointer */
  82         0,                                 /* always stabs debugging output */
  83         BE_VRFY_WARN,                      /* verification level: warn */
  84         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  85         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  86         "cplex"                            /* ilp solver */
  87 };
  88
  89 /* config file. */
  90 static char config_file[256] = { 0 };
  91
  92 /* register allocator to use. */
  93 //static const be_ra_t *ra = &be_ra_chordal_allocator;
  94
  95 /* back end instruction set architecture to use */
  96 static const arch_isa_if_t *isa_if = &ia32_isa_if;
  97
  98 #ifdef WITH_LIBCORE
  99
 100 /* possible dumping options */
 101 static const lc_opt_enum_mask_items_t dump_items[] = {
 102         { "none",       DUMP_NONE },
 103         { "initial",    DUMP_INITIAL },
 104         { "abi",        DUMP_ABI    },
 105         { "sched",      DUMP_SCHED  },
 106         { "prepared",   DUMP_PREPARED },
 107         { "regalloc",   DUMP_RA },
 108         { "final",      DUMP_FINAL },
 109         { "be",         DUMP_BE },
 110         { "all",        2 * DUMP_BE - 1 },
 111         { NULL,         0 }
 112 };
 113
 114 /* instruction set architectures. */
 115 static const lc_opt_enum_const_ptr_items_t isa_items[] = {
 116         { "ia32",    &ia32_isa_if },
 117 #if 0
 118         { "sta",     &sta_isa_if },
 119         { "arm",     &arm_isa_if },
 120         { "ppc32",   &ppc32_isa_if },
 121         { "mips",    &mips_isa_if },
 122 #endif
 123         { NULL,      NULL }
 124 };
 125
 126 /* verify options. */
 127 static const lc_opt_enum_int_items_t vrfy_items[] = {
 128         { "off",    BE_VRFY_OFF    },
 129         { "warn",   BE_VRFY_WARN   },
 130         { "assert", BE_VRFY_ASSERT },
 131         { NULL,     0 }
 132 };
 133
 134 /* scheduling options. */
 135 static const lc_opt_enum_int_items_t sched_items[] = {
 136         { "list", BE_SCHED_LIST },
 137 #ifdef WITH_ILP
 138         { "ilp",  BE_SCHED_ILP  },
 139 #endif /* WITH_ILP */
 140         { NULL,   0 }
 141 };
 142
 143 static lc_opt_enum_mask_var_t dump_var = {
 144         &be_options.dump_flags, dump_items
 145 };
 146
 147 static lc_opt_enum_const_ptr_var_t isa_var = {
 148         (const void **) &isa_if, isa_items
 149 };
 150
 151 static lc_opt_enum_int_var_t vrfy_var = {
 152         &be_options.vrfy_option, vrfy_items
 153 };
 154
 155 static lc_opt_enum_int_var_t sched_var = {
 156         &be_options.scheduler, sched_items
 157 };
 158
 159 static const lc_opt_table_entry_t be_main_options[] = {
 160         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
 161         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
 162         LC_OPT_ENT_ENUM_PTR ("isa",      "the instruction set architecture",                    &isa_var),
 163         LC_OPT_ENT_NEGBOOL  ("noomitfp", "do not omit frame pointer",                           &be_options.omit_fp),
 164         LC_OPT_ENT_BOOL     ("stabs",    "enable stabs debug support",                          &be_options.stabs_debug_support),
 165         LC_OPT_ENT_ENUM_PTR ("vrfy",     "verify the backend irg",                              &vrfy_var),
 166         LC_OPT_ENT_BOOL     ("time",     "get backend timing statistics",                       &be_options.timing),
 167         LC_OPT_ENT_BOOL     ("profile",  "instrument the code for execution count profiling",   &be_options.opt_profile),
 168         LC_OPT_ENT_ENUM_PTR ("sched",    "select a scheduler",                                  &sched_var),
 169         LC_OPT_ENT_STR      ("statfile", "append statistics to file statfile", &be_options.stat_file_name, sizeof(be_options.stat_file_name)),
 170
 171 #ifdef WITH_ILP
 172         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 173         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 174 #endif /* WITH_ILP */
 175         { NULL }
 176 };
 177
 178 #endif /* WITH_LIBCORE */
 179
 180 void be_opt_register(void)
 181 {
 182 #ifdef WITH_LIBCORE
 183         lc_opt_entry_t *be_grp;
 184         static int run_once = 0;
 185
 186         if (run_once) {
 187                 return;
 188         }
 189         run_once     = 1;
 190
 191         be_init_modules();
 192
 193         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 194         lc_opt_add_table(be_grp, be_main_options);
 195 #endif /* WITH_LIBCORE */
 196 }
 197
 198 /* Parse one argument. */
 199 int be_parse_arg(const char *arg) {
 200 #ifdef WITH_LIBCORE
 201         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 202         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 203                 lc_opt_print_help(be_grp, stdout);
 204                 return -1;
 205         }
 206         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 207 #else
 208         return 0;
 209 #endif /* WITH_LIBCORE */
 210 }
 211
 212 /** The be parameters returned by default, all off. */
 213 const static backend_params be_params = {
 214         NULL,
 215         NULL,
 216         0,
 217         NULL,
 218 };
 219
 220 /* Perform schedule verification if requested. */
 221 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) {
 222         if (vrfy_opt == BE_VRFY_WARN) {
 223                 be_verify_schedule(irg);
 224         }
 225         else if (vrfy_opt == BE_VRFY_ASSERT) {
 226                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 227         }
 228 }
 229
 230 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
 231 const backend_params *be_init(void)
 232 {
 233         be_opt_register();
 234         be_init_modules();
 235         phi_class_init();
 236
 237         if (isa_if->get_params)
 238                 return isa_if->get_params();
 239         return &be_params;
 240 }
 241
 242 /**
 243  * Initializes the main environment for the backend.
 244  *
 245  * @param env          an empty environment
 246  * @param file_handle  the file handle where the output will be written to
 247  */
 248 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 249 {
 250         memset(env, 0, sizeof(*env));
 251         obstack_init(&env->obst);
 252         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 253         env->options  = &be_options;
 254         FIRM_DBG_REGISTER(env->dbg, "be.main");
 255
 256         arch_env_init(env->arch_env, isa_if, file_handle, env);
 257
 258         /* Register the irn handler of the architecture */
 259         if (arch_isa_get_irn_handler(env->arch_env->isa))
 260                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 261
 262         /*
 263          * Register the node handler of the back end infrastructure.
 264          * This irn handler takes care of the platform independent
 265          * spill, reload and perm nodes.
 266          */
 267         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 268         env->phi_handler = be_phi_handler_new(env->arch_env);
 269         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 270
 271         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 272         return env;
 273 }
 274
 275 static void be_done_env(be_main_env_t *env)
 276 {
 277         env->arch_env->isa->impl->done(env->arch_env->isa);
 278         be_dbg_close(env->db_handle);
 279         be_phi_handler_free(env->phi_handler);
 280         obstack_free(&env->obst, NULL);
 281 }
 282
 283 /**
 284  * A wrapper around a firm dumper. Dumps only, if
 285  * flags are enabled.
 286  *
 287  * @param mask    a bitmask containing the reason what will be dumped
 288  * @param irg     the IR graph to dump
 289  * @param suffix  the suffix for the dumper
 290  * @param dumper  the dumper to be called
 291  */
 292 static void dump(int mask, ir_graph *irg, const char *suffix,
 293                  void (*dumper)(ir_graph *, const char *))
 294 {
 295         if(be_options.dump_flags & mask)
 296                 be_dump(irg, suffix, dumper);
 297 }
 298
 299 /**
 300  * Prepare a backend graph for code generation and initialize its birg
 301  */
 302 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 303 {
 304         memset(birg, 0, sizeof(*birg));
 305         birg->irg = irg;
 306         birg->main_env = env;
 307
 308         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 309         edges_activate_kind(irg, EDGE_KIND_DEP);
 310
 311         DBG((env->dbg, LEVEL_2, "====> IRG: %F\n", irg));
 312         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 313
 314         be_stat_init_irg(env->arch_env, irg);
 315         be_do_stat_nodes(irg, "01 Begin");
 316
 317         /* set the current graph (this is important for several firm functions) */
 318         current_ir_graph = irg;
 319
 320         /* Normalize proj nodes. */
 321         normalize_proj_nodes(irg);
 322
 323         /* Make just one return node. */
 324         normalize_one_return(irg);
 325
 326         /* Remove critical edges */
 327         remove_critical_cf_edges(irg);
 328
 329         /* Ensure, that the ir_edges are computed. */
 330         edges_assure(irg);
 331
 332         /* reset the phi handler. */
 333         be_phi_handler_reset(env->phi_handler);
 334 }
 335
 336 #ifdef WITH_LIBCORE
 337
 338 #define BE_TIMER_PUSH(timer)                                                        \
 339         if (be_options.timing == BE_TIME_ON) {                                          \
 340                 int res = lc_timer_push(timer);                                             \
 341                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 342                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 343                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 344                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 345                                 lc_timer_get_name(timer));                                          \
 346         }
 347 #define BE_TIMER_POP(timer)                                                                    \
 348         if (be_options.timing == BE_TIME_ON) {                                                     \
 349                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 350                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 351                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 352                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 353                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 354                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 355                 timer = tmp;                                                                           \
 356         }
 357
 358 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 359
 360 #else
 361
 362 #define BE_TIMER_PUSH(timer)
 363 #define BE_TIMER_POP(timer)
 364 #define BE_TIMER_ONLY(code)
 365
 366 #endif /* WITH_LIBCORE */
 367
 368
 369 /**
 370  * The Firm backend main loop.
 371  * Do architecture specific lowering for all graphs
 372  * and call the architecture specific code generator.
 373  *
 374  * @param file_handle   the file handle the output will be written to
 375  * @param cup_name      name of the compilation unit
 376  */
 377 static void be_main_loop(FILE *file_handle, const char *cup_name)
 378 {
 379         int i;
 380         arch_isa_t *isa;
 381         be_main_env_t env;
 382         unsigned num_nodes_b = 0;
 383         unsigned num_nodes_a = 0;
 384         unsigned num_nodes_r = 0;
 385         char prof_filename[256];
 386         static const char suffix[] = ".prof";
 387         be_irg_t *birgs;
 388         unsigned num_birgs;
 389
 390         be_ra_timer_t *ra_timer;
 391
 392 #ifdef WITH_LIBCORE
 393         lc_timer_t *t_abi      = NULL;
 394         lc_timer_t *t_codegen  = NULL;
 395         lc_timer_t *t_sched    = NULL;
 396         lc_timer_t *t_constr   = NULL;
 397         lc_timer_t *t_regalloc = NULL;
 398         lc_timer_t *t_finish   = NULL;
 399         lc_timer_t *t_emit     = NULL;
 400         lc_timer_t *t_other    = NULL;
 401         lc_timer_t *t_verify   = NULL;
 402
 403         if (be_options.timing == BE_TIME_ON) {
 404                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 405                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 406                 t_sched    = lc_timer_register("sched",    "scheduling");
 407                 t_constr   = lc_timer_register("constr",   "assure constraints");
 408                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 409                 t_finish   = lc_timer_register("finish",   "graph finish");
 410                 t_emit     = lc_timer_register("emiter",   "code emiter");
 411                 t_verify   = lc_timer_register("verify",   "graph verification");
 412                 t_other    = lc_timer_register("other",    "other");
 413         }
 414 #endif /* WITH_LIBCORE */
 415
 416         be_init_env(&env, file_handle);
 417
 418         isa = arch_env_get_isa(env.arch_env);
 419
 420         be_dbg_so(env.db_handle, cup_name);
 421         be_dbg_types(env.db_handle);
 422
 423         /* we might need 1 birg more for instrumentation constructor */
 424         num_birgs = get_irp_n_irgs();
 425         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 426
 427         /* First: initialize all birgs */
 428         for(i = 0; i < get_irp_n_irgs(); ++i) {
 429                 ir_graph *irg = get_irp_irg(i);
 430
 431                 initialize_birg(&birgs[i], irg, &env);
 432         }
 433
 434         /*
 435                 Get the filename for the profiling data.
 436                 Beware: '\0' is already included in sizeof(suffix)
 437         */
 438         memset(prof_filename, 0, sizeof(prof_filename));
 439         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 440         strcat(prof_filename, suffix);
 441
 442         /*
 443                 Next: Either instruments all irgs with profiling code
 444                 or try to read in profile data for current translation unit.
 445         */
 446         if (be_options.opt_profile) {
 447                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 448                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 449                 num_birgs++;
 450                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 451         }
 452         else {
 453                 be_profile_read(prof_filename);
 454         }
 455
 456         /* For all graphs */
 457         for (i = 0; i < num_birgs; ++i) {
 458                 be_irg_t *birg = & birgs[i];
 459                 ir_graph *irg  = birg->irg;
 460                 optimization_state_t state;
 461                 const arch_code_generator_if_t *cg_if;
 462                 char irg_name[128];
 463
 464                 /* set the current graph (this is important for several firm functions) */
 465                 current_ir_graph = irg;
 466
 467 #ifdef FIRM_STATISTICS
 468                 if(be_stat_ev_is_active()) {
 469                         ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
 470                         be_stat_tags[STAT_TAG_CLS] = "<all>";
 471                         be_stat_tags[STAT_TAG_IRG] = irg_name;
 472                         be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 473                 }
 474 #endif
 475
 476                 /* stop and reset timers */
 477                 BE_TIMER_ONLY(
 478                         LC_STOP_AND_RESET_TIMER(t_abi);
 479                         LC_STOP_AND_RESET_TIMER(t_codegen);
 480                         LC_STOP_AND_RESET_TIMER(t_sched);
 481                         LC_STOP_AND_RESET_TIMER(t_constr);
 482                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 483                         LC_STOP_AND_RESET_TIMER(t_finish);
 484                         LC_STOP_AND_RESET_TIMER(t_emit);
 485                         LC_STOP_AND_RESET_TIMER(t_verify);
 486                         LC_STOP_AND_RESET_TIMER(t_other);
 487                 );
 488                 BE_TIMER_PUSH(t_other);   /* t_other */
 489
 490                 /* Verify the initial graph */
 491                 BE_TIMER_PUSH(t_verify);
 492                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 493                         irg_verify(irg, VRFY_ENFORCE_SSA);
 494                         be_check_dominance(irg);
 495                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 496                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 497                         assert(be_check_dominance(irg) && "Dominance verification failed");
 498                 }
 499                 BE_TIMER_POP(t_verify);
 500
 501                 /**
 502                  * Create execution frequencies from profile data or estimate some
 503                  */
 504                 if (be_profile_has_data()) {
 505                         birg->exec_freq = be_create_execfreqs_from_profile(irg);
 506                 } else {
 507                         birg->exec_freq = compute_execfreq(irg, 10);
 508                 }
 509
 510                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 511
 512                 /* Get the code generator interface. */
 513                 cg_if = isa->impl->get_code_generator_if(isa);
 514
 515                 /* get a code generator for this graph. */
 516                 birg->cg = cg_if->init(birg);
 517
 518                 /* some transformations need to be done before abi introduce */
 519                 arch_code_generator_before_abi(birg->cg);
 520
 521                 /* reset the phi handler. */
 522                 be_phi_handler_reset(env.phi_handler);
 523
 524                 /* implement the ABI conventions. */
 525                 BE_TIMER_PUSH(t_abi);
 526                 birg->abi = be_abi_introduce(birg);
 527                 BE_TIMER_POP(t_abi);
 528
 529                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 530                 be_do_stat_nodes(irg, "02 Abi");
 531
 532                 /* generate code */
 533                 BE_TIMER_PUSH(t_codegen);
 534                 arch_code_generator_prepare_graph(birg->cg);
 535                 BE_TIMER_POP(t_codegen);
 536
 537                 be_do_stat_nodes(irg, "03 Prepare");
 538
 539                 /*
 540                         Since the code generator made a lot of new nodes and skipped
 541                         a lot of old ones, we should do dead node elimination here.
 542                         Note that this requires disabling the edges here.
 543                 */
 544                 edges_deactivate(irg);
 545                 //dead_node_elimination(irg);
 546                 edges_activate(irg);
 547
 548                 /* Compute loop nesting information (for weighting copies) */
 549                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 550                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 551
 552                 /* let backend prepare scheduling */
 553                 BE_TIMER_PUSH(t_codegen);
 554                 arch_code_generator_before_sched(birg->cg);
 555                 BE_TIMER_POP(t_codegen);
 556
 557                 /* schedule the irg */
 558                 BE_TIMER_PUSH(t_sched);
 559                 switch (be_options.scheduler) {
 560                         default:
 561                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 562                         case BE_SCHED_LIST:
 563                                 list_sched(birg, &be_options);
 564                                 break;
 565 #ifdef WITH_ILP
 566                         case BE_SCHED_ILP:
 567                                 be_ilp_sched(birg);
 568                                 //fprintf(stderr, "Warning: ILP scheduler not yet fully implemented, falling back to list scheduler.\n");
 569                                 //list_sched(birg, &be_options);
 570                                 break;
 571 #endif /* WITH_ILP */
 572                 };
 573                 BE_TIMER_POP(t_sched);
 574
 575                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 576
 577                 /* check schedule */
 578                 BE_TIMER_PUSH(t_verify);
 579                 be_sched_vrfy(irg, be_options.vrfy_option);
 580                 BE_TIMER_POP(t_verify);
 581
 582                 be_do_stat_nodes(irg, "04 Schedule");
 583
 584                 /* introduce patterns to assure constraints */
 585                 BE_TIMER_PUSH(t_constr);
 586                 /* we switch off optimizations here, because they might cause trouble */
 587                 save_optimization_state(&state);
 588                 set_optimize(0);
 589                 set_opt_normalize(0);
 590
 591                 /* add Keeps for should_be_different constrained nodes  */
 592                 /* beware: needs schedule due to usage of be_ssa_constr */
 593                 assure_constraints(birg);
 594                 BE_TIMER_POP(t_constr);
 595
 596                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 597                 be_do_stat_nodes(irg, "05 Constraints");
 598
 599                 /* connect all stack modifying nodes together (see beabi.c) */
 600                 BE_TIMER_PUSH(t_abi);
 601                 be_abi_fix_stack_nodes(birg->abi, NULL);
 602                 BE_TIMER_POP(t_abi);
 603
 604                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 605
 606                 /* check schedule */
 607                 BE_TIMER_PUSH(t_verify);
 608                 be_sched_vrfy(irg, be_options.vrfy_option);
 609                 BE_TIMER_POP(t_verify);
 610
 611                 /* do some statistics */
 612                 be_do_stat_reg_pressure(birg);
 613
 614                 /* stuff needs to be done after scheduling but before register allocation */
 615                 BE_TIMER_PUSH(t_codegen);
 616                 arch_code_generator_before_ra(birg->cg);
 617                 BE_TIMER_POP(t_codegen);
 618
 619 #ifdef FIRM_STATISTICS
 620                 if(be_stat_ev_is_active()) {
 621                         be_stat_ev_l("costs_before_ra",
 622                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 623                 }
 624 #endif
 625
 626                 /* Do register allocation */
 627                 BE_TIMER_PUSH(t_regalloc);
 628                 //ra_timer = ra->allocate(birg);
 629                 BE_TIMER_POP(t_regalloc);
 630
 631 #ifdef FIRM_STATISTICS
 632                 if(be_stat_ev_is_active()) {
 633                         be_stat_ev_l("costs_after_ra",
 634                                         (long) be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 635                 }
 636 #endif
 637
 638                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 639                 be_do_stat_nodes(irg, "06 Register Allocation");
 640
 641                 /* let the code generator prepare the graph for emitter */
 642                 BE_TIMER_PUSH(t_finish);
 643                 arch_code_generator_after_ra(birg->cg);
 644                 BE_TIMER_POP(t_finish);
 645
 646                 /* fix stack offsets */
 647                 BE_TIMER_PUSH(t_abi);
 648                 be_abi_fix_stack_nodes(birg->abi, NULL);
 649                 be_remove_dead_nodes_from_schedule(irg);
 650                 be_abi_fix_stack_bias(birg->abi);
 651                 BE_TIMER_POP(t_abi);
 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(irg);
 666                         be_verify_register_allocation(env.arch_env, irg);
 667                 }
 668                 else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 669                         //assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 670                         assert(be_verify_out_edges(irg));
 671                         assert(be_check_dominance(irg) && "Dominance verification failed");
 672                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 673                         assert(be_verify_register_allocation(env.arch_env, irg)
 674                                && "register allocation verification failed");
 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_extblock_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_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 693                 BE_TIMER_POP(t_other);
 694
 695 #define LC_EMIT(timer)  \
 696         if(!be_stat_ev_is_active()) { \
 697                 printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 698         } else { \
 699                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 700         }
 701 #define LC_EMIT_RA(timer) \
 702         if(!be_stat_ev_is_active()) { \
 703                 printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 704         } else { \
 705                 be_stat_ev_l(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 706         }
 707                 BE_TIMER_ONLY(
 708                         if(!be_stat_ev_is_active()) {
 709                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 710                                 printf("# nodes at begin:  %u\n", num_nodes_b);
 711                                 printf("# nodes before ra: %u\n", num_nodes_r);
 712                                 printf("# nodes at end:    %u\n\n", num_nodes_a);
 713                         }
 714                         LC_EMIT(t_abi);
 715                         LC_EMIT(t_codegen);
 716                         LC_EMIT(t_sched);
 717                         LC_EMIT(t_constr);
 718                         LC_EMIT(t_regalloc);
 719                         LC_EMIT_RA(ra_timer->t_prolog);
 720                         LC_EMIT_RA(ra_timer->t_live);
 721                         LC_EMIT_RA(ra_timer->t_spill);
 722                         LC_EMIT_RA(ra_timer->t_spillslots);
 723                         LC_EMIT_RA(ra_timer->t_color);
 724                         LC_EMIT_RA(ra_timer->t_ifg);
 725                         LC_EMIT_RA(ra_timer->t_copymin);
 726                         LC_EMIT_RA(ra_timer->t_ssa);
 727                         LC_EMIT_RA(ra_timer->t_epilog);
 728                         LC_EMIT_RA(ra_timer->t_verify);
 729                         LC_EMIT_RA(ra_timer->t_other);
 730                         LC_EMIT(t_finish);
 731                         LC_EMIT(t_emit);
 732                         LC_EMIT(t_verify);
 733                         LC_EMIT(t_other);
 734                 );
 735 #undef LC_EMIT_RA
 736 #undef LC_EMIT
 737
 738                 be_free_birg(birg);
 739
 740         /* switched off due to statistics (statistic module needs all irgs) */
 741 #ifdef FIRM_STATISTICS
 742                 if (! stat_is_active())
 743 #endif
 744                         free_ir_graph(irg);
 745
 746                 if(be_stat_ev_is_active()) {
 747                         be_stat_ev_pop();
 748                 }
 749         }
 750         be_profile_free();
 751         be_done_env(&env);
 752
 753 #undef BE_TIMER_POP
 754 #undef BE_TIMER_PUSH
 755 #undef BE_TIMER_ONLY
 756 }
 757
 758 /* Main interface to the frontend. */
 759 void be_main(FILE *file_handle, const char *cup_name)
 760 {
 761 #ifdef WITH_LIBCORE
 762         lc_timer_t *t = NULL;
 763
 764         /* The user specified another config file to read. do that now. */
 765         if(strlen(config_file) > 0) {
 766                 FILE *f;
 767
 768                 if((f = fopen(config_file, "rt")) != NULL) {
 769                         lc_opt_from_file(config_file, f, NULL);
 770                         fclose(f);
 771                 }
 772         }
 773
 774         if (be_options.timing == BE_TIME_ON) {
 775                 t = lc_timer_register("bemain", "measure complete bemain loop");
 776
 777                 if (lc_timer_enter_high_priority()) {
 778                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 779                 }
 780
 781                 lc_timer_reset_and_start(t);
 782         }
 783
 784 #ifdef FIRM_STATISTICS
 785         be_init_stat_file(be_options.stat_file_name, cup_name);
 786 #endif
 787 #endif /* WITH_LIBCORE */
 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 #ifdef WITH_LIBCORE
 797         if (be_options.timing == BE_TIME_ON) {
 798                 lc_timer_stop(t);
 799                 lc_timer_leave_high_priority();
 800                 if(be_stat_ev_is_active()) {
 801                         be_stat_ev_l("backend_time", lc_timer_elapsed_msec(t));
 802                 } else {
 803                         printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 804                 }
 805         }
 806
 807 #ifdef FIRM_STATISTICS
 808         be_close_stat_file();
 809 #endif
 810 #endif /* WITH_LIBCORE */
 811 }
 812
 813 /** The debug info retriever function. */
 814 static retrieve_dbg_func retrieve_dbg = NULL;
 815
 816 /* Sets a debug info retriever. */
 817 void be_set_debug_retrieve(retrieve_dbg_func func) {
 818         retrieve_dbg = func;
 819 }
 820
 821 /* Retrieve the debug info. */
 822 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 823         if (retrieve_dbg)
 824                 return retrieve_dbg(dbg, line);
 825
 826         *line = 0;
 827         return NULL;
 828 }
 829
 830 int be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 831 {
 832         if(bs == NULL)
 833                 bs = bitset_alloca(cls->n_regs);
 834         else
 835                 bitset_clear_all(bs);
 836
 837         assert(bitset_size(bs) == (unsigned) cls->n_regs);
 838         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 839         bitset_flip_all(bs);
 840         be_abi_put_ignore_regs(birg->abi, cls, bs);
 841
 842         return bitset_popcnt(bs);
 843 }