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

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief       Main Backend driver.
  23  * @author      Sebastian Hack
  24  * @date        25.11.2004
  25  * @version     $Id$
  26  */
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include <stdarg.h>
  32 #include <stdio.h>
  33
  34 #include "lc_opts.h"
  35 #include "lc_opts_enum.h"
  36
  37 #include "obst.h"
  38 #include "bitset.h"
  39
  40 #include "irprog.h"
  41 #include "irgopt.h"
  42 #include "irgraph.h"
  43 #include "irdump.h"
  44 #include "phiclass.h"
  45 #include "irdom_t.h"
  46 #include "iredges_t.h"
  47 #include "irloop_t.h"
  48 #include "irtools.h"
  49 #include "irvrfy.h"
  50 #include "irprintf.h"
  51 #include "iroptimize.h"
  52 #include "firmstat.h"
  53 #include "execfreq.h"
  54 #include "irprofile.h"
  55
  56 #include "bearch_t.h"
  57 #include "be_t.h"
  58 #include "bemodule.h"
  59 #include "beutil.h"
  60 #include "benode_t.h"
  61 #include "beirgmod.h"
  62 #include "besched_t.h"
  63 #include "belistsched.h"
  64 #include "belive_t.h"
  65 #include "bera.h"
  66 #include "bechordal_t.h"
  67 #include "beifg.h"
  68 #include "beifg_impl.h"
  69 #include "becopyopt.h"
  70 #include "becopystat.h"
  71 #include "bessadestr.h"
  72 #include "beabi.h"
  73 #include "belower.h"
  74 #include "beschedmris.h"
  75 #include "bestat.h"
  76 #include "beverify.h"
  77 #include "be_dbgout.h"
  78 #include "beirg_t.h"
  79
  80 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
  81
  82 #ifdef WITH_ILP
  83 #include "beilpsched.h"
  84 #endif /* WITH_ILP */
  85
  86 /* options visible for anyone */
  87 static be_options_t be_options = {
  88         DUMP_NONE,                         /* dump flags */
  89         BE_TIME_OFF,                       /* no timing */
  90         0,                                 /* no opt profile */
  91         0,                                 /* try to omit frame pointer */
  92         0,                                 /* try to omit leaf frame pointer */
  93         0,                                 /* create PIC code */
  94         0,                                 /* create gprof compatible profiling code */
  95         BE_VRFY_WARN,                      /* verification level: warn */
  96         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  97         "linux",                           /* target OS name */
  98         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  99         "cplex",                           /* ilp solver */
 100         0,                                 /* enable statistic event dumping */
 101         "",                                /* print stat events */
 102 };
 103
 104 /* config file. */
 105 static char config_file[256] = { 0 };
 106
 107 /* back end instruction set architecture to use */
 108 static const arch_isa_if_t *isa_if = NULL;
 109
 110 /* possible dumping options */
 111 static const lc_opt_enum_mask_items_t dump_items[] = {
 112         { "none",       DUMP_NONE },
 113         { "initial",    DUMP_INITIAL },
 114         { "abi",        DUMP_ABI    },
 115         { "sched",      DUMP_SCHED  },
 116         { "prepared",   DUMP_PREPARED },
 117         { "regalloc",   DUMP_RA },
 118         { "final",      DUMP_FINAL },
 119         { "be",         DUMP_BE },
 120         { "all",        2 * DUMP_BE - 1 },
 121         { NULL,         0 }
 122 };
 123
 124 /* verify options. */
 125 static const lc_opt_enum_int_items_t vrfy_items[] = {
 126         { "off",    BE_VRFY_OFF    },
 127         { "warn",   BE_VRFY_WARN   },
 128         { "assert", BE_VRFY_ASSERT },
 129         { NULL,     0 }
 130 };
 131
 132 /* scheduling options. */
 133 static const lc_opt_enum_int_items_t sched_items[] = {
 134         { "list", BE_SCHED_LIST },
 135 #ifdef WITH_ILP
 136         { "ilp",  BE_SCHED_ILP  },
 137 #endif /* WITH_ILP */
 138         { NULL,   0 }
 139 };
 140
 141 static lc_opt_enum_mask_var_t dump_var = {
 142         &be_options.dump_flags, dump_items
 143 };
 144
 145 static lc_opt_enum_int_var_t vrfy_var = {
 146         &be_options.vrfy_option, vrfy_items
 147 };
 148
 149 static lc_opt_enum_int_var_t sched_var = {
 150         &be_options.scheduler, sched_items
 151 };
 152
 153 static const lc_opt_table_entry_t be_main_options[] = {
 154         LC_OPT_ENT_STR      ("config",     "read another config file containing backend options", config_file, sizeof(config_file)),
 155         LC_OPT_ENT_ENUM_MASK("dump",       "dump irg on several occasions",                       &dump_var),
 156         LC_OPT_ENT_BOOL     ("omitfp",     "omit frame pointer",                                  &be_options.omit_fp),
 157         LC_OPT_ENT_BOOL     ("omitleaffp", "omit frame pointer in leaf routines",                 &be_options.omit_leaf_fp),
 158         LC_OPT_ENT_BOOL     ("pic",        "create PIC code",                                     &be_options.pic),
 159         LC_OPT_ENT_BOOL     ("gprof",      "create gprof profiling code",                         &be_options.gprof),
 160         LC_OPT_ENT_ENUM_PTR ("vrfy",       "verify the backend irg",                              &vrfy_var),
 161         LC_OPT_ENT_BOOL     ("time",       "get backend timing statistics",                       &be_options.timing),
 162         LC_OPT_ENT_BOOL     ("profile",    "instrument the code for execution count profiling",   &be_options.opt_profile),
 163         LC_OPT_ENT_ENUM_PTR ("sched",      "select a scheduler",                                  &sched_var),
 164         LC_OPT_ENT_STR      ("os",         "specify target operating system",                     &be_options.target_os, sizeof(be_options.target_os)),
 165 #ifdef FIRM_STATISTICS
 166         LC_OPT_ENT_BOOL     ("statev",     "dump statistic events",                               &be_options.statev),
 167         LC_OPT_ENT_STR      ("filtev",     "filter for stat events (regex if support is active",  &be_options.filtev, sizeof(be_options.filtev)),
 168 #endif
 169
 170 #ifdef WITH_ILP
 171         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 172         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 173 #endif /* WITH_ILP */
 174         LC_OPT_LAST
 175 };
 176
 177 static be_module_list_entry_t *isa_ifs = NULL;
 178
 179 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 180 {
 181         if (isa_if == NULL)
 182                 isa_if = isa;
 183
 184         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 185 }
 186
 187 void be_opt_register(void)
 188 {
 189         lc_opt_entry_t *be_grp;
 190         static int run_once = 0;
 191
 192         if (run_once) {
 193                 return;
 194         }
 195         run_once     = 1;
 196
 197         be_init_modules();
 198
 199         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 200         lc_opt_add_table(be_grp, be_main_options);
 201
 202         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 203                                &isa_ifs, (void**) &isa_if);
 204 }
 205
 206 /* Parse one argument. */
 207 int be_parse_arg(const char *arg) {
 208         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 209         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 210                 lc_opt_print_help(be_grp, stdout);
 211                 return -1;
 212         }
 213         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 214 }
 215
 216 /** The be parameters returned by default, all off. */
 217 static const backend_params be_params = {
 218         0,    /* need dword lowering */
 219         0,    /* don't support inline assembler yet */
 220         0,     /* no immediate floating point mode. */
 221         NULL, /* no additional opcodes */
 222         NULL, /* will be set later */
 223         NULL, /* but yet no creator function */
 224         NULL, /* context for create_intrinsic_fkt */
 225         NULL, /* no if conversion settings */
 226         NULL   /* no immediate fp mode */
 227 };
 228
 229 /* Perform schedule verification if requested. */
 230 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 231         if (vrfy_opt == BE_VRFY_WARN) {
 232                 be_verify_schedule(birg);
 233         } else if (vrfy_opt == BE_VRFY_ASSERT) {
 234                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
 235         }
 236 }
 237
 238 /* Initialize the Firm backend. Must be run first in init_firm()! */
 239 void firm_be_init(void)
 240 {
 241         be_opt_register();
 242         be_init_modules();
 243 }
 244
 245 /* Returns the backend parameter */
 246 const backend_params *be_get_backend_param(void)
 247 {
 248         if (isa_if->get_params)
 249                 return isa_if->get_params();
 250         return &be_params;
 251 }
 252
 253 /**
 254  * Initializes the main environment for the backend.
 255  *
 256  * @param env          an empty environment
 257  * @param file_handle  the file handle where the output will be written to
 258  */
 259 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 260 {
 261         memset(env, 0, sizeof(*env));
 262         env->options              = &be_options;
 263         env->ent_trampoline_map   = pmap_create();
 264         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 265         env->ent_pic_symbol_map   = pmap_create();
 266         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 267
 268         remove_irp_type(env->pic_trampolines_type);
 269         remove_irp_type(env->pic_symbols_type);
 270         set_class_final(env->pic_trampolines_type, 1);
 271
 272         env->arch_env = arch_env_init(isa_if, file_handle, env);
 273
 274         be_phi_handler_new(env);
 275
 276         be_dbg_open();
 277         return env;
 278 }
 279
 280 /**
 281  * Called when the be_main_env_t can be destroyed.
 282  */
 283 static void be_done_env(be_main_env_t *env)
 284 {
 285         arch_env_done(env->arch_env);
 286         be_dbg_close();
 287         be_phi_handler_free();
 288
 289         pmap_destroy(env->ent_trampoline_map);
 290         pmap_destroy(env->ent_pic_symbol_map);
 291         free_type(env->pic_trampolines_type);
 292         free_type(env->pic_symbols_type);
 293 }
 294
 295 /**
 296  * A wrapper around a firm dumper. Dumps only, if
 297  * flags are enabled.
 298  *
 299  * @param mask    a bitmask containing the reason what will be dumped
 300  * @param irg     the IR graph to dump
 301  * @param suffix  the suffix for the dumper
 302  * @param dumper  the dumper to be called
 303  */
 304 static void dump(int mask, ir_graph *irg, const char *suffix,
 305                  void (*dumper)(ir_graph *, const char *))
 306 {
 307         if(be_options.dump_flags & mask)
 308                 be_dump(irg, suffix, dumper);
 309 }
 310
 311 /**
 312  * Prepare a backend graph for code generation and initialize its birg
 313  */
 314 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 315 {
 316         memset(birg, 0, sizeof(*birg));
 317         birg->irg = irg;
 318         birg->main_env = env;
 319
 320         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 321         edges_activate_kind(irg, EDGE_KIND_DEP);
 322
 323         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 324
 325         be_stat_init_irg(env->arch_env, irg);
 326         be_do_stat_nodes(irg, "01 Begin");
 327
 328         /* set the current graph (this is important for several firm functions) */
 329         current_ir_graph = irg;
 330
 331         /* Normalize proj nodes. */
 332         normalize_proj_nodes(irg);
 333
 334         /* we do this before critical edge split. As this produces less returns,
 335            because sometimes (= 164.gzip) multiple returns are slower */
 336         normalize_n_returns(irg);
 337
 338         /* Remove critical edges */
 339         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 340
 341         /* Ensure, that the ir_edges are computed. */
 342         edges_assure(irg);
 343
 344         set_irg_phase_state(irg, phase_backend);
 345
 346         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 347 }
 348
 349 #define BE_TIMER_ONLY(code)   do { if (be_timing) { code; } } while(0)
 350
 351 int be_timing;
 352 ir_timer_t *t_abi;
 353 ir_timer_t *t_codegen;
 354 ir_timer_t *t_sched;
 355 ir_timer_t *t_constr;
 356 ir_timer_t *t_finish;
 357 ir_timer_t *t_emit;
 358 ir_timer_t *t_other;
 359 ir_timer_t *t_verify;
 360 ir_timer_t *t_heights;
 361 ir_timer_t *t_live;
 362 ir_timer_t *t_execfreq;
 363 ir_timer_t *t_ssa_constr;
 364 ir_timer_t *t_ra_constr;
 365 ir_timer_t *t_ra_prolog;
 366 ir_timer_t *t_ra_epilog;
 367 ir_timer_t *t_ra_spill;
 368 ir_timer_t *t_ra_spill_apply;
 369 ir_timer_t *t_ra_color;
 370 ir_timer_t *t_ra_ifg;
 371 ir_timer_t *t_ra_copymin;
 372 ir_timer_t *t_ra_ssa;
 373 ir_timer_t *t_ra_other;
 374
 375 /**
 376  * The Firm backend main loop.
 377  * Do architecture specific lowering for all graphs
 378  * and call the architecture specific code generator.
 379  *
 380  * @param file_handle   the file handle the output will be written to
 381  * @param cup_name      name of the compilation unit
 382  */
 383 static void be_main_loop(FILE *file_handle, const char *cup_name)
 384 {
 385         int i;
 386         be_main_env_t env;
 387         char prof_filename[256];
 388         static const char suffix[] = ".prof";
 389         be_irg_t *birgs;
 390         int num_birgs;
 391         ir_graph **irg_list, **backend_irg_list;
 392         arch_env_t *arch_env;
 393
 394         be_timing = (be_options.timing == BE_TIME_ON);
 395
 396         if (be_timing) {
 397                 t_abi        = ir_timer_register("time_beabi",       "be abi introduction");
 398                 t_codegen    = ir_timer_register("time_codegen",     "codegeneration");
 399                 t_sched      = ir_timer_register("time_sched",       "scheduling");
 400                 t_constr     = ir_timer_register("time_constr",      "assure constraints");
 401                 t_finish     = ir_timer_register("time_finish",      "graph finish");
 402                 t_emit       = ir_timer_register("time_emiter",      "code emiter");
 403                 t_verify     = ir_timer_register("time_verify",      "graph verification");
 404                 t_other      = ir_timer_register("time_other",       "other");
 405                 t_heights    = ir_timer_register("time_heights",     "heights");
 406                 t_live       = ir_timer_register("time_liveness",    "be liveness");
 407                 t_execfreq   = ir_timer_register("time_execfreq",    "execfreq");
 408                 t_ssa_constr = ir_timer_register("time_ssa_constr",  "ssa reconstruction");
 409                 t_ra_prolog  = ir_timer_register("time_ra_prolog",   "regalloc prolog");
 410                 t_ra_epilog  = ir_timer_register("time_ra_epilog",   "regalloc epilog");
 411                 t_ra_constr  = ir_timer_register("time_ra_constr",   "regalloc constraints");
 412                 t_ra_spill   = ir_timer_register("time_ra_spill",    "spiller");
 413                 t_ra_spill_apply
 414                         = ir_timer_register("time_ra_spill_apply", "apply spills");
 415                 t_ra_color   = ir_timer_register("time_ra_color",    "graph coloring");
 416                 t_ra_ifg     = ir_timer_register("time_ra_ifg",      "interference graph");
 417                 t_ra_copymin = ir_timer_register("time_ra_copymin",  "copy minimization");
 418                 t_ra_ssa     = ir_timer_register("time_ra_ssadestr", "ssa destruction");
 419                 t_ra_other   = ir_timer_register("time_ra_other",    "regalloc other");
 420         }
 421
 422         be_init_env(&env, file_handle);
 423         env.cup_name = cup_name;
 424
 425         be_dbg_so(cup_name);
 426         be_dbg_types();
 427
 428         arch_env = env.arch_env;
 429
 430         /* backend may provide an ordered list of irgs where code should be generated for */
 431         irg_list         = NEW_ARR_F(ir_graph *, 0);
 432         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 433
 434         /* we might need 1 birg more for instrumentation constructor */
 435         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 436         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 437
 438         /* First: initialize all birgs */
 439         for(i = 0; i < num_birgs; ++i) {
 440                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 441                 initialize_birg(&birgs[i], irg, &env);
 442         }
 443         DEL_ARR_F(irg_list);
 444
 445         /*
 446                 Get the filename for the profiling data.
 447                 Beware: '\0' is already included in sizeof(suffix)
 448         */
 449         memset(prof_filename, 0, sizeof(prof_filename));
 450         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 451         strcat(prof_filename, suffix);
 452
 453         /*
 454                 Next: Either instruments all irgs with profiling code
 455                 or try to read in profile data for current translation unit.
 456         */
 457         if (be_options.opt_profile) {
 458                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 459                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 460                 num_birgs++;
 461         } else {
 462                 ir_profile_read(prof_filename);
 463         }
 464
 465         /* For all graphs */
 466         for (i = 0; i < num_birgs; ++i) {
 467                 be_irg_t *birg = &birgs[i];
 468                 ir_graph *irg  = birg->irg;
 469                 optimization_state_t state;
 470                 const arch_code_generator_if_t *cg_if;
 471
 472                 /* set the current graph (this is important for several firm functions) */
 473                 current_ir_graph = irg;
 474
 475 #if 0
 476                 {
 477                         unsigned percent = 100*i/num_birgs;
 478                         ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
 479                 }
 480 #endif
 481                 be_sched_init_phase(irg);
 482
 483                 /* reset the phi handler. */
 484                 be_phi_handler_reset();
 485
 486                 stat_ev_ctx_push_fobj("bemain_irg", irg);
 487
 488                 /* stop and reset timers */
 489                 BE_TIMER_PUSH(t_other);   /* t_other */
 490
 491                 /* Verify the initial graph */
 492                 BE_TIMER_PUSH(t_verify);
 493                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 494                         irg_verify(irg, VRFY_ENFORCE_SSA);
 495                         be_check_dominance(irg);
 496                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 497                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 498                         assert(be_check_dominance(irg) && "Dominance verification failed");
 499                 }
 500                 BE_TIMER_POP(t_verify);
 501
 502                 /* Get the code generator interface. */
 503                 cg_if = arch_env_get_code_generator_if(arch_env);
 504
 505                 /* get a code generator for this graph. */
 506                 birg->cg = cg_if->init(birg);
 507
 508                 /* some transformations need to be done before abi introduce */
 509                 arch_code_generator_before_abi(birg->cg);
 510
 511                 /* implement the ABI conventions. */
 512                 BE_TIMER_PUSH(t_abi);
 513                 birg->abi = be_abi_introduce(birg);
 514                 BE_TIMER_POP(t_abi);
 515
 516                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 517                 be_do_stat_nodes(irg, "02 Abi");
 518
 519                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 520                         be_check_dominance(irg);
 521                         be_verify_out_edges(irg);
 522                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 523                         assert(be_verify_out_edges(irg));
 524                         assert(be_check_dominance(irg) && "Dominance verification failed");
 525                 }
 526
 527                 /* generate code */
 528                 stat_ev_ctx_push_str("bemain_phase", "prepare");
 529                 BE_TIMER_PUSH(t_codegen);
 530                 arch_code_generator_prepare_graph(birg->cg);
 531                 BE_TIMER_POP(t_codegen);
 532                 stat_ev_ctx_pop("bemain_phase");
 533
 534                 /* reset the phi handler. */
 535                 be_phi_handler_reset();
 536
 537                 be_do_stat_nodes(irg, "03 Prepare");
 538
 539                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 540
 541                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 542                         be_check_dominance(irg);
 543                         be_verify_out_edges(irg);
 544                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 545                         assert(be_verify_out_edges(irg));
 546                         assert(be_check_dominance(irg) && "Dominance verification failed");
 547                 }
 548
 549                 BE_TIMER_PUSH(t_execfreq);
 550                 /**
 551                  * Create execution frequencies from profile data or estimate some
 552                  */
 553                 if (ir_profile_has_data())
 554                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 555                 else
 556                         birg->exec_freq = compute_execfreq(irg, 10);
 557                 BE_TIMER_POP(t_execfreq);
 558
 559
 560                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 561                 /* be_live_chk_compare(birg); */
 562
 563                 /* let backend prepare scheduling */
 564                 stat_ev_ctx_push_str("bemain_phase", "before_sched");
 565                 BE_TIMER_PUSH(t_codegen);
 566                 arch_code_generator_before_sched(birg->cg);
 567                 BE_TIMER_POP(t_codegen);
 568                 stat_ev_ctx_pop("bemain_phase");
 569
 570                 /* schedule the irg */
 571                 BE_TIMER_PUSH(t_sched);
 572                 switch (be_options.scheduler) {
 573                         default:
 574                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 575                         case BE_SCHED_LIST:
 576                                 list_sched(birg, &be_options);
 577                                 break;
 578 #ifdef WITH_ILP
 579                         case BE_SCHED_ILP:
 580                                 be_ilp_sched(birg, &be_options);
 581                                 break;
 582 #endif /* WITH_ILP */
 583                 };
 584                 BE_TIMER_POP(t_sched);
 585
 586                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 587
 588                 /* check schedule */
 589                 BE_TIMER_PUSH(t_verify);
 590                 be_sched_vrfy(birg, be_options.vrfy_option);
 591                 BE_TIMER_POP(t_verify);
 592
 593                 be_do_stat_nodes(irg, "04 Schedule");
 594
 595                 /* introduce patterns to assure constraints */
 596                 BE_TIMER_PUSH(t_constr);
 597                 /* we switch off optimizations here, because they might cause trouble */
 598                 save_optimization_state(&state);
 599                 set_optimize(0);
 600                 set_opt_normalize(0);
 601                 set_opt_cse(0);
 602
 603                 assert(!get_opt_cse());
 604
 605                 /* add Keeps for should_be_different constrained nodes  */
 606                 /* beware: needs schedule due to usage of be_ssa_constr */
 607                 assure_constraints(birg);
 608                 BE_TIMER_POP(t_constr);
 609
 610                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 611                 be_do_stat_nodes(irg, "05 Constraints");
 612
 613                 /* stuff needs to be done after scheduling but before register allocation */
 614                 BE_TIMER_PUSH(t_codegen);
 615                 arch_code_generator_before_ra(birg->cg);
 616                 BE_TIMER_POP(t_codegen);
 617
 618                 /* connect all stack modifying nodes together (see beabi.c) */
 619                 BE_TIMER_PUSH(t_abi);
 620                 be_abi_fix_stack_nodes(birg->abi);
 621                 BE_TIMER_POP(t_abi);
 622
 623                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 624
 625                 /* check schedule */
 626                 BE_TIMER_PUSH(t_verify);
 627                 be_sched_vrfy(birg, be_options.vrfy_option);
 628                 BE_TIMER_POP(t_verify);
 629
 630                 /* do some statistics */
 631                 //be_do_stat_reg_pressure(birg);
 632
 633 #ifdef FIRM_STATISTICS
 634                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 635 #endif
 636
 637                 /* Do register allocation */
 638                 be_allocate_registers(birg);
 639
 640 #ifdef FIRM_STATISTICS
 641                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 642 #endif
 643
 644                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 645                 be_do_stat_nodes(irg, "06 Register Allocation");
 646
 647                 /* let the code generator prepare the graph for emitter */
 648                 BE_TIMER_PUSH(t_finish);
 649                 arch_code_generator_after_ra(birg->cg);
 650                 BE_TIMER_POP(t_finish);
 651
 652                 /* fix stack offsets */
 653                 BE_TIMER_PUSH(t_abi);
 654                 be_abi_fix_stack_nodes(birg->abi);
 655                 be_remove_dead_nodes_from_schedule(birg);
 656                 be_abi_fix_stack_bias(birg->abi);
 657                 BE_TIMER_POP(t_abi);
 658
 659                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 660
 661                 BE_TIMER_PUSH(t_finish);
 662                 arch_code_generator_finish(birg->cg);
 663                 BE_TIMER_POP(t_finish);
 664
 665                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 666
 667                 /* check schedule and register allocation */
 668                 BE_TIMER_PUSH(t_verify);
 669                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 670                         irg_verify(irg, VRFY_ENFORCE_SSA);
 671                         be_check_dominance(irg);
 672                         be_verify_out_edges(irg);
 673                         be_verify_schedule(birg);
 674                         be_verify_register_allocation(birg);
 675                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 676                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 677                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 678                         assert(be_check_dominance(irg) && "Dominance verification failed");
 679                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 680                         assert(be_verify_register_allocation(birg)
 681                                && "register allocation verification failed");
 682
 683                 }
 684                 BE_TIMER_POP(t_verify);
 685
 686                 /* emit assembler code */
 687                 BE_TIMER_PUSH(t_emit);
 688                 arch_code_generator_done(birg->cg);
 689                 BE_TIMER_POP(t_emit);
 690
 691                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 692
 693                 BE_TIMER_PUSH(t_abi);
 694                 be_abi_free(birg->abi);
 695                 BE_TIMER_POP(t_abi);
 696
 697                 be_do_stat_nodes(irg, "07 Final");
 698                 restore_optimization_state(&state);
 699
 700                 BE_TIMER_POP(t_other);
 701
 702 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
 703
 704 #define LC_EMIT(timer)  \
 705                 stat_ev_if {    \
 706                         stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer));  \
 707                 } else { \
 708                         printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
 709                 } \
 710                 STOP_AND_RESET_TIMER(timer);
 711
 712                 BE_TIMER_ONLY(
 713                         stat_ev_if {
 714                         } else {
 715                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 716                         }
 717                         LC_EMIT(t_abi);
 718                         LC_EMIT(t_codegen);
 719                         LC_EMIT(t_sched);
 720                         LC_EMIT(t_live);
 721                         LC_EMIT(t_heights);
 722                         LC_EMIT(t_ssa_constr);
 723                         LC_EMIT(t_constr);
 724                         LC_EMIT(t_execfreq);
 725                         LC_EMIT(t_ra_prolog);
 726                         LC_EMIT(t_ra_spill);
 727                         LC_EMIT(t_ra_spill_apply);
 728                         LC_EMIT(t_ra_constr);
 729                         LC_EMIT(t_ra_color);
 730                         LC_EMIT(t_ra_ifg);
 731                         LC_EMIT(t_ra_copymin);
 732                         LC_EMIT(t_ra_ssa);
 733                         LC_EMIT(t_ra_epilog);
 734                         LC_EMIT(t_ra_other);
 735                         LC_EMIT(t_finish);
 736                         LC_EMIT(t_emit);
 737                         LC_EMIT(t_verify);
 738                         LC_EMIT(t_other);
 739                 );
 740 #undef LC_EMIT
 741
 742                 be_sched_free_phase(irg);
 743
 744                 be_free_birg(birg);
 745
 746         /* switched off due to statistics (statistic module needs all irgs) */
 747 #if 0   /* STA needs irgs */
 748 #ifdef FIRM_STATISTICS
 749                 if (! stat_is_active())
 750 #endif /* FIRM_STATISTICS */
 751                         free_ir_graph(irg);
 752 #endif /* if 0 */
 753                 stat_ev_ctx_pop("bemain_irg");
 754         }
 755         ir_profile_free();
 756         be_done_env(&env);
 757 }
 758
 759 /* Main interface to the frontend. */
 760 void be_main(FILE *file_handle, const char *cup_name)
 761 {
 762         ir_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 = ir_timer_register("bemain", "measure complete bemain loop");
 776
 777                 if (ir_timer_enter_high_priority()) {
 778                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 779                 }
 780
 781                 ir_timer_reset_and_start(t);
 782         }
 783
 784 #ifdef FIRM_STATISTICS
 785         if (be_options.statev) {
 786                 const char *dot = strrchr(cup_name, '.');
 787                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 788                 char       *buf = alloca(pos - cup_name + 1);
 789                 strncpy(buf, cup_name, pos - cup_name);
 790                 buf[pos - cup_name] = '\0';
 791
 792                 be_options.statev = 1;
 793                 stat_ev_begin(buf, be_options.filtev);
 794         }
 795 #endif
 796
 797         /* never build code for pseudo irgs */
 798         set_visit_pseudo_irgs(0);
 799
 800         be_node_init();
 801
 802         be_main_loop(file_handle, cup_name);
 803
 804         if (be_options.timing == BE_TIME_ON) {
 805                 ir_timer_stop(t);
 806                 ir_timer_leave_high_priority();
 807                 stat_ev_if {
 808                         stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
 809                 } else {
 810                         printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
 811                 }
 812         }
 813
 814 #ifdef FIRM_STATISTICS
 815         if (be_options.statev)
 816                 stat_ev_end();
 817 #endif
 818 }
 819
 820 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 821 {
 822         if (bs == NULL)
 823                 bs = bitset_alloca(cls->n_regs);
 824         else
 825                 bitset_clear_all(bs);
 826
 827         assert(bitset_size(bs) == (unsigned)cls->n_regs);
 828         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 829         bitset_flip_all(bs);
 830         be_abi_put_ignore_regs(birg->abi, cls, bs);
 831
 832         return bitset_popcnt(bs);
 833 }