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 <libcore/lc_opts.h>
  35 #include <libcore/lc_opts_enum.h>
  36 #include <libcore/lc_timing.h>
  37
  38 #include "obst.h"
  39 #include "bitset.h"
  40
  41 #include "irprog.h"
  42 #include "irgopt.h"
  43 #include "irgraph.h"
  44 #include "irdump.h"
  45 #include "phiclass.h"
  46 #include "irdom_t.h"
  47 #include "iredges_t.h"
  48 #include "irloop_t.h"
  49 #include "irtools.h"
  50 #include "irvrfy.h"
  51 #include "irprintf.h"
  52 #include "firmstat.h"
  53 #include "execfreq.h"
  54
  55 #include "bearch_t.h"
  56 #include "be_t.h"
  57 #include "bemodule.h"
  58 #include "beutil.h"
  59 #include "benode_t.h"
  60 #include "beirgmod.h"
  61 #include "besched_t.h"
  62 #include "belistsched.h"
  63 #include "belive_t.h"
  64 #include "bespillbelady.h"
  65 #include "bera.h"
  66 #include "bechordal_t.h"
  67 #include "beifg.h"
  68 #include "beifg_impl.h"
  69 #include "becopyopt.h"
  70 #include "becopystat.h"
  71 #include "bessadestr.h"
  72 #include "beabi.h"
  73 #include "belower.h"
  74 #include "beschedmris.h"
  75 #include "bestat.h"
  76 #include "beverify.h"
  77 #include "beprofile.h"
  78 #include "be_dbgout.h"
  79 #include "beirg_t.h"
  80
  81 #ifdef WITH_ILP
  82 #include "beilpsched.h"
  83 #endif /* WITH_ILP */
  84
  85 /* options visible for anyone */
  86 static be_options_t be_options = {
  87         DUMP_NONE,                         /* dump flags */
  88         BE_TIME_OFF,                       /* no timing */
  89         0,                                 /* no opt profile */
  90         0,                                 /* try to omit frame pointer */
  91         0,                                 /* no stabs debugging output */
  92         BE_VRFY_WARN,                      /* verification level: warn */
  93         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  94         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  95         "cplex",                           /* ilp solver */
  96         0,                                 /* enable statistic event dumping */
  97         "",                                /* print stat events */
  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_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 #ifdef FIRM_STATISTICS
 159         LC_OPT_ENT_BOOL     ("statev",   "dump statistic events",                               &be_options.statev),
 160         LC_OPT_ENT_STR      ("filtev",   "filter for stat events (regex if support is active",  &be_options.printev, sizeof(be_options.printev)),
 161 #endif
 162
 163 #ifdef WITH_ILP
 164         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 165         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 166 #endif /* WITH_ILP */
 167         LC_OPT_LAST
 168 };
 169
 170 static be_module_list_entry_t *isa_ifs = NULL;
 171
 172 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 173 {
 174         if(isa_if == NULL)
 175                 isa_if = isa;
 176
 177         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 178 }
 179
 180 void be_opt_register(void)
 181 {
 182         lc_opt_entry_t *be_grp;
 183         static int run_once = 0;
 184
 185         if (run_once) {
 186                 return;
 187         }
 188         run_once     = 1;
 189
 190         be_init_modules();
 191
 192         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 193         lc_opt_add_table(be_grp, be_main_options);
 194
 195         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 196                                &isa_ifs, (void**) &isa_if);
 197 }
 198
 199 /* Parse one argument. */
 200 int be_parse_arg(const char *arg) {
 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 }
 208
 209 /** The be parameters returned by default, all off. */
 210 static const backend_params be_params = {
 211         0,    /* need dword lowering */
 212         0,    /* don't support inlien assembler yet */
 213         NULL, /* no additional opcodes */
 214         NULL, /* will be set later */
 215         NULL, /* but yet no creator function */
 216         NULL, /* context for create_intrinsic_fkt */
 217         NULL, /* no if conversion settings */
 218 };
 219
 220 /* Perform schedule verification if requested. */
 221 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 222         if (vrfy_opt == BE_VRFY_WARN) {
 223                 be_verify_schedule(birg);
 224         }
 225         else if (vrfy_opt == BE_VRFY_ASSERT) {
 226                 assert(be_verify_schedule(birg) && "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
 236         if (isa_if->get_params)
 237                 return isa_if->get_params();
 238         return &be_params;
 239 }
 240
 241 /**
 242  * Initializes the main environment for the backend.
 243  *
 244  * @param env          an empty environment
 245  * @param file_handle  the file handle where the output will be written to
 246  */
 247 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 248 {
 249         memset(env, 0, sizeof(*env));
 250         obstack_init(&env->obst);
 251         env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
 252         env->options  = &be_options;
 253
 254         arch_env_init(env->arch_env, isa_if, file_handle, env);
 255
 256         /* Register the irn handler of the architecture */
 257         if (arch_isa_get_irn_handler(env->arch_env->isa))
 258                 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
 259
 260         /*
 261          * Register the node handler of the back end infrastructure.
 262          * This irn handler takes care of the platform independent
 263          * spill, reload and perm nodes.
 264          */
 265         arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
 266         env->phi_handler = be_phi_handler_new(env->arch_env);
 267         arch_env_push_irn_handler(env->arch_env, env->phi_handler);
 268
 269         env->db_handle = be_options.stabs_debug_support ? be_stabs_open(file_handle) : be_nulldbg_open();
 270         return env;
 271 }
 272
 273 static void be_done_env(be_main_env_t *env)
 274 {
 275         env->arch_env->isa->impl->done(env->arch_env->isa);
 276         be_dbg_close(env->db_handle);
 277         be_phi_handler_free(env->phi_handler);
 278         obstack_free(&env->obst, NULL);
 279 }
 280
 281 /**
 282  * A wrapper around a firm dumper. Dumps only, if
 283  * flags are enabled.
 284  *
 285  * @param mask    a bitmask containing the reason what will be dumped
 286  * @param irg     the IR graph to dump
 287  * @param suffix  the suffix for the dumper
 288  * @param dumper  the dumper to be called
 289  */
 290 static void dump(int mask, ir_graph *irg, const char *suffix,
 291                  void (*dumper)(ir_graph *, const char *))
 292 {
 293         if(be_options.dump_flags & mask)
 294                 be_dump(irg, suffix, dumper);
 295 }
 296
 297 /**
 298  * Prepare a backend graph for code generation and initialize its birg
 299  */
 300 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 301 {
 302         memset(birg, 0, sizeof(*birg));
 303         birg->irg = irg;
 304         birg->main_env = env;
 305
 306         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 307         edges_activate_kind(irg, EDGE_KIND_DEP);
 308
 309         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 310
 311         be_stat_init_irg(env->arch_env, irg);
 312         be_do_stat_nodes(irg, "01 Begin");
 313
 314         /* set the current graph (this is important for several firm functions) */
 315         current_ir_graph = irg;
 316
 317         /* Normalize proj nodes. */
 318         normalize_proj_nodes(irg);
 319
 320         /* we do this before critical edge split. As this produces less returns,
 321            because sometimes (= 164.gzip) multiple returns are slower */
 322         normalize_n_returns(irg);
 323
 324         /* Remove critical edges */
 325         remove_critical_cf_edges(irg);
 326
 327         /* Ensure, that the ir_edges are computed. */
 328         edges_assure(irg);
 329
 330         set_irg_phase_state(irg, phase_backend);
 331
 332         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 333 }
 334
 335 #define BE_TIMER_PUSH(timer)                                                        \
 336         if (be_options.timing == BE_TIME_ON) {                                          \
 337                 int res = lc_timer_push(timer);                                             \
 338                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                               \
 339                         assert(res && "Timer already on stack, cannot be pushed twice.");       \
 340                 else if (be_options.vrfy_option == BE_VRFY_WARN && ! res)                   \
 341                         fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 342                                 lc_timer_get_name(timer));                                          \
 343         }
 344 #define BE_TIMER_POP(timer)                                                                    \
 345         if (be_options.timing == BE_TIME_ON) {                                                     \
 346                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 347                 if (be_options.vrfy_option == BE_VRFY_ASSERT)                                          \
 348                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 349                 else if (be_options.vrfy_option == BE_VRFY_WARN && tmp != timer)                       \
 350                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 351                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 352                 timer = tmp;                                                                           \
 353         }
 354
 355 #define BE_TIMER_ONLY(code)   do { if (be_options.timing == BE_TIME_ON) { code; } } while(0)
 356
 357 /**
 358  * The Firm backend main loop.
 359  * Do architecture specific lowering for all graphs
 360  * and call the architecture specific code generator.
 361  *
 362  * @param file_handle   the file handle the output will be written to
 363  * @param cup_name      name of the compilation unit
 364  */
 365 static void be_main_loop(FILE *file_handle, const char *cup_name)
 366 {
 367         int i;
 368         arch_isa_t *isa;
 369         be_main_env_t env;
 370         unsigned num_nodes_b = 0;
 371         unsigned num_nodes_a = 0;
 372         unsigned num_nodes_r = 0;
 373         char prof_filename[256];
 374         static const char suffix[] = ".prof";
 375         be_irg_t *birgs;
 376         int num_birgs;
 377         ir_graph **irg_list, **backend_irg_list;
 378
 379         lc_timer_t *t_abi      = NULL;
 380         lc_timer_t *t_codegen  = NULL;
 381         lc_timer_t *t_sched    = NULL;
 382         lc_timer_t *t_constr   = NULL;
 383         lc_timer_t *t_regalloc = NULL;
 384         lc_timer_t *t_finish   = NULL;
 385         lc_timer_t *t_emit     = NULL;
 386         lc_timer_t *t_other    = NULL;
 387         lc_timer_t *t_verify   = NULL;
 388
 389         if (be_options.timing == BE_TIME_ON) {
 390                 t_abi      = lc_timer_register("beabi",    "be abi introduction");
 391                 t_codegen  = lc_timer_register("codegen",  "codegeneration");
 392                 t_sched    = lc_timer_register("sched",    "scheduling");
 393                 t_constr   = lc_timer_register("constr",   "assure constraints");
 394                 t_regalloc = lc_timer_register("regalloc", "register allocation");
 395                 t_finish   = lc_timer_register("finish",   "graph finish");
 396                 t_emit     = lc_timer_register("emiter",   "code emiter");
 397                 t_verify   = lc_timer_register("verify",   "graph verification");
 398                 t_other    = lc_timer_register("other",    "other");
 399         }
 400
 401         be_init_env(&env, file_handle);
 402
 403         isa = arch_env_get_isa(env.arch_env);
 404
 405         be_dbg_so(env.db_handle, cup_name);
 406         be_dbg_types(env.db_handle);
 407
 408         /* backend may provide an ordered list of irgs where code should be generated for */
 409         irg_list         = NEW_ARR_F(ir_graph *, 0);
 410         backend_irg_list = arch_isa_get_backend_irg_list(isa, &irg_list);
 411
 412         /* we might need 1 birg more for instrumentation constructor */
 413         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 414         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 415
 416         /* First: initialize all birgs */
 417         for(i = 0; i < num_birgs; ++i) {
 418                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 419                 initialize_birg(&birgs[i], irg, &env);
 420         }
 421         DEL_ARR_F(irg_list);
 422
 423         /*
 424                 Get the filename for the profiling data.
 425                 Beware: '\0' is already included in sizeof(suffix)
 426         */
 427         memset(prof_filename, 0, sizeof(prof_filename));
 428         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 429         strcat(prof_filename, suffix);
 430
 431         /*
 432                 Next: Either instruments all irgs with profiling code
 433                 or try to read in profile data for current translation unit.
 434         */
 435         if (be_options.opt_profile) {
 436                 ir_graph *prof_init_irg = be_profile_instrument(prof_filename, profile_default);
 437                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 438                 num_birgs++;
 439                 set_method_img_section(get_irg_entity(prof_init_irg), section_constructors);
 440         } else {
 441                 be_profile_read(prof_filename);
 442         }
 443
 444         /* For all graphs */
 445         for (i = 0; i < num_birgs; ++i) {
 446                 be_irg_t *birg = &birgs[i];
 447                 ir_graph *irg  = birg->irg;
 448                 optimization_state_t state;
 449                 const arch_code_generator_if_t *cg_if;
 450
 451                 /* set the current graph (this is important for several firm functions) */
 452                 current_ir_graph = irg;
 453
 454                 /* reset the phi handler. */
 455                 be_phi_handler_reset(env.phi_handler);
 456
 457                 stat_ev_ctx_push_fobj("bemain_irg", irg);
 458
 459                 /* stop and reset timers */
 460                 BE_TIMER_ONLY(
 461                         LC_STOP_AND_RESET_TIMER(t_abi);
 462                         LC_STOP_AND_RESET_TIMER(t_codegen);
 463                         LC_STOP_AND_RESET_TIMER(t_sched);
 464                         LC_STOP_AND_RESET_TIMER(t_constr);
 465                         LC_STOP_AND_RESET_TIMER(t_regalloc);
 466                         LC_STOP_AND_RESET_TIMER(t_finish);
 467                         LC_STOP_AND_RESET_TIMER(t_emit);
 468                         LC_STOP_AND_RESET_TIMER(t_verify);
 469                         LC_STOP_AND_RESET_TIMER(t_other);
 470                 );
 471                 BE_TIMER_PUSH(t_other);   /* t_other */
 472
 473                 /* Verify the initial graph */
 474                 BE_TIMER_PUSH(t_verify);
 475                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 476                         irg_verify(irg, VRFY_ENFORCE_SSA);
 477                         be_check_dominance(irg);
 478                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 479                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 480                         assert(be_check_dominance(irg) && "Dominance verification failed");
 481                 }
 482                 BE_TIMER_POP(t_verify);
 483
 484                 BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg));
 485
 486                 /* Get the code generator interface. */
 487                 cg_if = isa->impl->get_code_generator_if(isa);
 488
 489                 /* get a code generator for this graph. */
 490                 birg->cg = cg_if->init(birg);
 491
 492                 /* some transformations need to be done before abi introduce */
 493                 arch_code_generator_before_abi(birg->cg);
 494
 495                 /* implement the ABI conventions. */
 496                 BE_TIMER_PUSH(t_abi);
 497                 birg->abi = be_abi_introduce(birg);
 498                 BE_TIMER_POP(t_abi);
 499
 500                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 501                 be_do_stat_nodes(irg, "02 Abi");
 502
 503                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 504                         be_check_dominance(irg);
 505                         be_verify_out_edges(irg);
 506                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 507                         assert(be_verify_out_edges(irg));
 508                         assert(be_check_dominance(irg) && "Dominance verification failed");
 509                 }
 510
 511                 /* generate code */
 512                 stat_ev_ctx_push_str("bemain_phase", "prepare");
 513                 BE_TIMER_PUSH(t_codegen);
 514                 arch_code_generator_prepare_graph(birg->cg);
 515                 BE_TIMER_POP(t_codegen);
 516                 stat_ev_ctx_pop("bemain_phase");
 517
 518                 /* reset the phi handler. */
 519                 be_phi_handler_reset(env.phi_handler);
 520
 521                 be_do_stat_nodes(irg, "03 Prepare");
 522
 523                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 524                 BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg));
 525
 526                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 527                         be_check_dominance(irg);
 528                         be_verify_out_edges(irg);
 529                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 530                         assert(be_verify_out_edges(irg));
 531                         assert(be_check_dominance(irg) && "Dominance verification failed");
 532                 }
 533
 534                 /**
 535                  * Create execution frequencies from profile data or estimate some
 536                  */
 537                 if (be_profile_has_data())
 538                         birg->exec_freq = be_create_execfreqs_from_profile(irg);
 539                 else
 540                         birg->exec_freq = compute_execfreq(irg, 10);
 541
 542
 543                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 544                 /* be_live_chk_compare(birg); */
 545
 546                 /* let backend prepare scheduling */
 547                 stat_ev_ctx_push_str("bemain_phase", "before_sched");
 548                 BE_TIMER_PUSH(t_codegen);
 549                 arch_code_generator_before_sched(birg->cg);
 550                 BE_TIMER_POP(t_codegen);
 551                 stat_ev_ctx_pop("bemain_phase");
 552
 553                 /* schedule the irg */
 554                 BE_TIMER_PUSH(t_sched);
 555                 switch (be_options.scheduler) {
 556                         default:
 557                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 558                         case BE_SCHED_LIST:
 559                                 list_sched(birg, &be_options);
 560                                 break;
 561 #ifdef WITH_ILP
 562                         case BE_SCHED_ILP:
 563                                 be_ilp_sched(birg, &be_options);
 564                                 break;
 565 #endif /* WITH_ILP */
 566                 };
 567                 BE_TIMER_POP(t_sched);
 568
 569                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 570
 571                 /* check schedule */
 572                 BE_TIMER_PUSH(t_verify);
 573                 be_sched_vrfy(birg, be_options.vrfy_option);
 574                 BE_TIMER_POP(t_verify);
 575
 576                 be_do_stat_nodes(irg, "04 Schedule");
 577
 578                 /* introduce patterns to assure constraints */
 579                 BE_TIMER_PUSH(t_constr);
 580                 /* we switch off optimizations here, because they might cause trouble */
 581                 save_optimization_state(&state);
 582                 set_optimize(0);
 583                 set_opt_normalize(0);
 584
 585                 /* add Keeps for should_be_different constrained nodes  */
 586                 /* beware: needs schedule due to usage of be_ssa_constr */
 587                 assure_constraints(birg);
 588                 BE_TIMER_POP(t_constr);
 589
 590                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 591                 be_do_stat_nodes(irg, "05 Constraints");
 592
 593                 /* stuff needs to be done after scheduling but before register allocation */
 594                 BE_TIMER_PUSH(t_codegen);
 595                 arch_code_generator_before_ra(birg->cg);
 596                 BE_TIMER_POP(t_codegen);
 597
 598                 /* connect all stack modifying nodes together (see beabi.c) */
 599                 BE_TIMER_PUSH(t_abi);
 600                 be_abi_fix_stack_nodes(birg->abi);
 601                 BE_TIMER_POP(t_abi);
 602
 603                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 604
 605                 /* check schedule */
 606                 BE_TIMER_PUSH(t_verify);
 607                 be_sched_vrfy(birg, be_options.vrfy_option);
 608                 BE_TIMER_POP(t_verify);
 609
 610                 /* do some statistics */
 611                 //be_do_stat_reg_pressure(birg);
 612
 613 #ifdef FIRM_STATISTICS
 614                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 615 #endif
 616
 617                 /* Do register allocation */
 618                 BE_TIMER_PUSH(t_regalloc);
 619                 be_allocate_registers(birg);
 620                 BE_TIMER_POP(t_regalloc);
 621
 622 #ifdef FIRM_STATISTICS
 623                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, env.arch_env, birg->exec_freq));
 624 #endif
 625
 626                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 627                 be_do_stat_nodes(irg, "06 Register Allocation");
 628
 629                 /* let the code generator prepare the graph for emitter */
 630                 BE_TIMER_PUSH(t_finish);
 631                 arch_code_generator_after_ra(birg->cg);
 632                 BE_TIMER_POP(t_finish);
 633
 634                 /* fix stack offsets */
 635                 BE_TIMER_PUSH(t_abi);
 636                 be_abi_fix_stack_nodes(birg->abi);
 637                 be_remove_dead_nodes_from_schedule(birg);
 638                 be_abi_fix_stack_bias(birg->abi);
 639                 BE_TIMER_POP(t_abi);
 640
 641                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 642
 643                 BE_TIMER_PUSH(t_finish);
 644                 arch_code_generator_finish(birg->cg);
 645                 BE_TIMER_POP(t_finish);
 646
 647                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 648
 649                 /* check schedule and register allocation */
 650                 BE_TIMER_PUSH(t_verify);
 651                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 652                         irg_verify(irg, VRFY_ENFORCE_SSA);
 653                         be_check_dominance(irg);
 654                         be_verify_out_edges(irg);
 655                         be_verify_schedule(birg);
 656                         be_verify_register_allocation(birg);
 657                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 658                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 659                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 660                         assert(be_check_dominance(irg) && "Dominance verification failed");
 661                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 662                         assert(be_verify_register_allocation(birg)
 663                                && "register allocation verification failed");
 664
 665                 }
 666                 BE_TIMER_POP(t_verify);
 667
 668                 /* emit assembler code */
 669                 BE_TIMER_PUSH(t_emit);
 670                 arch_code_generator_done(birg->cg);
 671                 BE_TIMER_POP(t_emit);
 672
 673                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 674
 675                 BE_TIMER_PUSH(t_abi);
 676                 be_abi_free(birg->abi);
 677                 BE_TIMER_POP(t_abi);
 678
 679                 be_do_stat_nodes(irg, "07 Final");
 680                 restore_optimization_state(&state);
 681
 682                 BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg));
 683                 BE_TIMER_POP(t_other);
 684
 685 #define LC_EMIT(timer)  \
 686                 printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 687                 stat_ev_dbl(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer));
 688
 689 #define LC_EMIT_RA(timer) \
 690                 printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0); \
 691                 stat_ev_dbl(lc_timer_get_name(timer), lc_timer_elapsed_msec(timer)); \
 692
 693                 BE_TIMER_ONLY(
 694                         printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 695                         printf("# nodes at begin:  %u\n", num_nodes_b);
 696                         printf("# nodes before ra: %u\n", num_nodes_r);
 697                         printf("# nodes at end:    %u\n\n", num_nodes_a);
 698                         LC_EMIT(t_abi);
 699                         LC_EMIT(t_codegen);
 700                         LC_EMIT(t_sched);
 701                         LC_EMIT(t_constr);
 702                         LC_EMIT(t_regalloc);
 703                         if(global_ra_timer != NULL) {
 704                                 LC_EMIT_RA(global_ra_timer->t_prolog);
 705                                 LC_EMIT_RA(global_ra_timer->t_live);
 706                                 LC_EMIT_RA(global_ra_timer->t_spill);
 707                                 LC_EMIT_RA(global_ra_timer->t_spillslots);
 708                                 LC_EMIT_RA(global_ra_timer->t_color);
 709                                 LC_EMIT_RA(global_ra_timer->t_ifg);
 710                                 LC_EMIT_RA(global_ra_timer->t_copymin);
 711                                 LC_EMIT_RA(global_ra_timer->t_ssa);
 712                                 LC_EMIT_RA(global_ra_timer->t_epilog);
 713                                 LC_EMIT_RA(global_ra_timer->t_verify);
 714                                 LC_EMIT_RA(global_ra_timer->t_other);
 715                         }
 716                         LC_EMIT(t_finish);
 717                         LC_EMIT(t_emit);
 718                         LC_EMIT(t_verify);
 719                         LC_EMIT(t_other);
 720                 );
 721 #undef LC_EMIT_RA
 722 #undef LC_EMIT
 723
 724                 be_free_birg(birg);
 725
 726         /* switched off due to statistics (statistic module needs all irgs) */
 727 #if 0   /* STA needs irgs */
 728 #ifdef FIRM_STATISTICS
 729                 if (! stat_is_active())
 730 #endif /* FIRM_STATISTICS */
 731                         free_ir_graph(irg);
 732 #endif /* if 0 */
 733                 stat_ev_ctx_pop("bemain_irg");
 734         }
 735         be_profile_free();
 736         be_done_env(&env);
 737
 738 #undef BE_TIMER_POP
 739 #undef BE_TIMER_PUSH
 740 #undef BE_TIMER_ONLY
 741 }
 742
 743 /* Main interface to the frontend. */
 744 void be_main(FILE *file_handle, const char *cup_name)
 745 {
 746         lc_timer_t *t = NULL;
 747
 748         /* The user specified another config file to read. do that now. */
 749         if(strlen(config_file) > 0) {
 750                 FILE *f;
 751
 752                 if((f = fopen(config_file, "rt")) != NULL) {
 753                         lc_opt_from_file(config_file, f, NULL);
 754                         fclose(f);
 755                 }
 756         }
 757
 758         if (be_options.timing == BE_TIME_ON) {
 759                 t = lc_timer_register("bemain", "measure complete bemain loop");
 760
 761                 if (lc_timer_enter_high_priority()) {
 762                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 763                 }
 764
 765                 lc_timer_reset_and_start(t);
 766         }
 767
 768 #ifdef FIRM_STATISTICS
 769         if (be_options.statev) {
 770                 const char *dot = strrchr(cup_name, '.');
 771                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 772                 char       *buf = alloca(pos - cup_name + 1);
 773                 strncpy(buf, cup_name, pos - cup_name);
 774                 buf[pos - cup_name] = '\0';
 775
 776                 be_options.statev = 1;
 777                 stat_ev_begin(buf, be_options.printev);
 778         }
 779 #endif
 780
 781         /* never build code for pseudo irgs */
 782         set_visit_pseudo_irgs(0);
 783
 784         be_node_init();
 785
 786         be_main_loop(file_handle, cup_name);
 787
 788         if (be_options.timing == BE_TIME_ON) {
 789                 lc_timer_stop(t);
 790                 lc_timer_leave_high_priority();
 791                 stat_ev_dbl("backend_time", lc_timer_elapsed_msec(t));
 792                 printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t));
 793         }
 794
 795 #ifdef FIRM_STATISTICS
 796         if (be_options.statev)
 797                 stat_ev_end();
 798 #endif
 799 }
 800
 801 /** The debug info retriever function. */
 802 static retrieve_dbg_func retrieve_dbg = NULL;
 803
 804 /* Sets a debug info retriever. */
 805 void be_set_debug_retrieve(retrieve_dbg_func func) {
 806         retrieve_dbg = func;
 807 }
 808
 809 /* Retrieve the debug info. */
 810 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
 811         if (retrieve_dbg)
 812                 return retrieve_dbg(dbg, line);
 813
 814         *line = 0;
 815         return NULL;
 816 }
 817
 818 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 819 {
 820         if (bs == NULL)
 821                 bs = bitset_alloca(cls->n_regs);
 822         else
 823                 bitset_clear_all(bs);
 824
 825         assert(bitset_size(bs) == (unsigned)cls->n_regs);
 826         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 827         bitset_flip_all(bs);
 828         be_abi_put_ignore_regs(birg->abi, cls, bs);
 829
 830         return bitset_popcnt(bs);
 831 }