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 #include "config.h"
  28
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31
  32 #include "lc_opts.h"
  33 #include "lc_opts_enum.h"
  34
  35 #include "obst.h"
  36 #include "bitset.h"
  37
  38 #include "irprog.h"
  39 #include "irgopt.h"
  40 #include "irgraph.h"
  41 #include "irdump.h"
  42 #include "irdom_t.h"
  43 #include "iredges_t.h"
  44 #include "irloop_t.h"
  45 #include "irtools.h"
  46 #include "irverify.h"
  47 #include "irprintf.h"
  48 #include "iroptimize.h"
  49 #include "firmstat.h"
  50 #include "execfreq.h"
  51 #include "irprofile.h"
  52 #include "irpass_t.h"
  53
  54 #include "bearch.h"
  55 #include "be_t.h"
  56 #include "bemodule.h"
  57 #include "beutil.h"
  58 #include "benode.h"
  59 #include "beirgmod.h"
  60 #include "besched.h"
  61 #include "belistsched.h"
  62 #include "belive_t.h"
  63 #include "bera.h"
  64 #include "bechordal_t.h"
  65 #include "beifg.h"
  66 #include "becopyopt.h"
  67 #include "becopystat.h"
  68 #include "bessadestr.h"
  69 #include "beabi.h"
  70 #include "belower.h"
  71 #include "bestat.h"
  72 #include "beverify.h"
  73 #include "be_dbgout.h"
  74 #include "beirg.h"
  75 #include "bestack.h"
  76
  77 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
  78
  79 /* options visible for anyone */
  80 static be_options_t be_options = {
  81         DUMP_NONE,                         /* dump flags */
  82         BE_TIME_OFF,                       /* no timing */
  83         0,                                 /* no opt profile */
  84         0,                                 /* try to omit frame pointer */
  85         0,                                 /* create PIC code */
  86         0,                                 /* create gprof compatible profiling code */
  87         BE_VERIFY_WARN,                    /* verification level: warn */
  88         "linux",                           /* target OS name */
  89         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  90         "cplex",                           /* ilp solver */
  91         0,                                 /* enable statistic event dumping */
  92         "",                                /* print stat events */
  93 };
  94
  95 /* config file. */
  96 static char config_file[256] = { 0 };
  97
  98 /* back end instruction set architecture to use */
  99 static const arch_isa_if_t *isa_if = NULL;
 100
 101 /* possible dumping options */
 102 static const lc_opt_enum_mask_items_t dump_items[] = {
 103         { "none",       DUMP_NONE },
 104         { "initial",    DUMP_INITIAL },
 105         { "abi",        DUMP_ABI    },
 106         { "sched",      DUMP_SCHED  },
 107         { "prepared",   DUMP_PREPARED },
 108         { "regalloc",   DUMP_RA },
 109         { "final",      DUMP_FINAL },
 110         { "be",         DUMP_BE },
 111         { "all",        2 * DUMP_BE - 1 },
 112         { NULL,         0 }
 113 };
 114
 115 /* verify options. */
 116 static const lc_opt_enum_int_items_t verify_items[] = {
 117         { "off",    BE_VERIFY_OFF    },
 118         { "warn",   BE_VERIFY_WARN   },
 119         { "assert", BE_VERIFY_ASSERT },
 120         { NULL,     0 }
 121 };
 122
 123 static lc_opt_enum_mask_var_t dump_var = {
 124         &be_options.dump_flags, dump_items
 125 };
 126
 127 static lc_opt_enum_int_var_t verify_var = {
 128         &be_options.verify_option, verify_items
 129 };
 130
 131 static const lc_opt_table_entry_t be_main_options[] = {
 132         LC_OPT_ENT_STR      ("config",     "read another config file containing backend options", config_file, sizeof(config_file)),
 133         LC_OPT_ENT_ENUM_MASK("dump",       "dump irg on several occasions",                       &dump_var),
 134         LC_OPT_ENT_BOOL     ("omitfp",     "omit frame pointer",                                  &be_options.omit_fp),
 135         LC_OPT_ENT_BOOL     ("pic",        "create PIC code",                                     &be_options.pic),
 136         LC_OPT_ENT_BOOL     ("gprof",      "create gprof profiling code",                         &be_options.gprof),
 137         LC_OPT_ENT_ENUM_PTR ("verify",     "verify the backend irg",                              &verify_var),
 138         LC_OPT_ENT_BOOL     ("time",       "get backend timing statistics",                       &be_options.timing),
 139         LC_OPT_ENT_BOOL     ("profile",    "instrument the code for execution count profiling",   &be_options.opt_profile),
 140         LC_OPT_ENT_STR      ("os",         "specify target operating system",                     &be_options.target_os, sizeof(be_options.target_os)),
 141 #ifdef FIRM_STATISTICS
 142         LC_OPT_ENT_BOOL     ("statev",     "dump statistic events",                               &be_options.statev),
 143         LC_OPT_ENT_STR      ("filtev",     "filter for stat events (regex if support is active",  &be_options.filtev, sizeof(be_options.filtev)),
 144 #endif
 145
 146 #ifdef WITH_ILP
 147         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 148         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 149 #endif /* WITH_ILP */
 150         LC_OPT_LAST
 151 };
 152
 153 static be_module_list_entry_t *isa_ifs = NULL;
 154
 155
 156 asm_constraint_flags_t asm_constraint_flags[256];
 157
 158 void be_init_default_asm_constraint_flags(void)
 159 {
 160         asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 161         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 162         asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 163                 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
 164         asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 165                 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
 166         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 167
 168         asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
 169                 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
 170         asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
 171                 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
 172
 173         asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 174         asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 175         asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 176         asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 177         asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 178         asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 179         asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 180         asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 181         asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 182         asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 183         asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 184         asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 185         asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 186         asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 187
 188         asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 189         asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 190         asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 191         asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 192         asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 193
 194         asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 195         asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 196         asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 197         asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 198         asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 199         asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 200         asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 201         asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 202         asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 203         asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 204         asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 205
 206         asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
 207                 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
 208                 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 209
 210         /* these should have been catched by the parsing code already */
 211         asm_constraint_flags['#']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 212         asm_constraint_flags['*']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 213         asm_constraint_flags[' ']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 214         asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 215         asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 216         asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 217 }
 218
 219 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
 220 {
 221         asm_constraint_flags_t  flags = ASM_CONSTRAINT_FLAG_NONE;
 222         const char             *c;
 223         asm_constraint_flags_t  tflags;
 224
 225         for (c = constraint; *c != '\0'; ++c) {
 226                 switch (*c) {
 227                 case '#':
 228                         /* 'comment' stuff */
 229                         while (*c != 0 && *c != ',')
 230                                 ++c;
 231                         break;
 232                 case '*':
 233                         /* 'comment' character */
 234                         ++c;
 235                         break;
 236                 case ' ':
 237                 case '\t':
 238                 case '\n':
 239                 case '\r':
 240                         break;
 241                 default:
 242                         tflags = asm_constraint_flags[(int) *c];
 243                         if (tflags != 0) {
 244                                 flags |= tflags;
 245                         } else {
 246                                 flags |= isa_if->parse_asm_constraint(&c);
 247                         }
 248                         break;
 249                 }
 250         }
 251
 252         if ((
 253                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
 254                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
 255             ) || (
 256                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
 257                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
 258             )) {
 259                 flags |= ASM_CONSTRAINT_FLAG_INVALID;
 260         }
 261         if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ     |
 262                        ASM_CONSTRAINT_FLAG_MODIFIER_WRITE    |
 263                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
 264                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
 265             )) {
 266                 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
 267         }
 268
 269         return flags;
 270 }
 271
 272 int be_is_valid_clobber(const char *clobber)
 273 {
 274         /* memory is a valid clobber. (the frontend has to detect this case too,
 275          * because it has to add memory edges to the asm) */
 276         if (strcmp(clobber, "memory") == 0)
 277                 return 1;
 278         /* cc (condition code) is always valid */
 279         if (strcmp(clobber, "cc") == 0)
 280                 return 1;
 281
 282         return isa_if->is_valid_clobber(clobber);
 283 }
 284
 285 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 286 {
 287         if (isa_if == NULL)
 288                 isa_if = isa;
 289
 290         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 291 }
 292
 293 void be_opt_register(void)
 294 {
 295         lc_opt_entry_t *be_grp;
 296         static int run_once = 0;
 297
 298         if (run_once)
 299                 return;
 300         run_once = 1;
 301
 302         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 303         lc_opt_add_table(be_grp, be_main_options);
 304
 305         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 306                                &isa_ifs, (void**) &isa_if);
 307
 308         be_init_modules();
 309 }
 310
 311 /* Parse one argument. */
 312 int be_parse_arg(const char *arg)
 313 {
 314         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 315         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 316                 lc_opt_print_help_for_entry(be_grp, '-', stdout);
 317                 return -1;
 318         }
 319         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 320 }
 321
 322 /* Perform schedule verification if requested. */
 323 static void be_sched_verify(ir_graph *irg, int verify_opt)
 324 {
 325         if (verify_opt == BE_VERIFY_WARN) {
 326                 be_verify_schedule(irg);
 327         } else if (verify_opt == BE_VERIFY_ASSERT) {
 328                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 329         }
 330 }
 331
 332 /* Initialize the Firm backend. Must be run first in init_firm()! */
 333 void firm_be_init(void)
 334 {
 335         be_opt_register();
 336         be_init_modules();
 337 }
 338
 339 /* Finalize the Firm backend. */
 340 void firm_be_finish(void)
 341 {
 342         be_quit_modules();
 343 }
 344
 345 /* Returns the backend parameter */
 346 const backend_params *be_get_backend_param(void)
 347 {
 348         return isa_if->get_params();
 349 }
 350
 351 /**
 352  * Initializes the main environment for the backend.
 353  *
 354  * @param env          an empty environment
 355  * @param file_handle  the file handle where the output will be written to
 356  */
 357 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 358 {
 359         memset(env, 0, sizeof(*env));
 360         env->options              = &be_options;
 361         env->ent_trampoline_map   = pmap_create();
 362         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 363         env->ent_pic_symbol_map   = pmap_create();
 364         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 365
 366         remove_irp_type(env->pic_trampolines_type);
 367         remove_irp_type(env->pic_symbols_type);
 368         set_class_final(env->pic_trampolines_type, 1);
 369
 370         memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
 371         env->arch_env = arch_env_init(isa_if, file_handle, env);
 372
 373         be_dbg_open();
 374         return env;
 375 }
 376
 377 /**
 378  * Called when the be_main_env_t can be destroyed.
 379  */
 380 static void be_done_env(be_main_env_t *env)
 381 {
 382         arch_env_done(env->arch_env);
 383         be_dbg_close();
 384
 385         pmap_destroy(env->ent_trampoline_map);
 386         pmap_destroy(env->ent_pic_symbol_map);
 387         free_type(env->pic_trampolines_type);
 388         free_type(env->pic_symbols_type);
 389 }
 390
 391 /**
 392  * A wrapper around a firm dumper. Dumps only, if
 393  * flags are enabled.
 394  *
 395  * @param mask    a bitmask containing the reason what will be dumped
 396  * @param irg     the IR graph to dump
 397  * @param suffix  the suffix for the dumper
 398  * @param dumper  the dumper to be called
 399  */
 400 static void dump(int mask, ir_graph *irg, const char *suffix)
 401 {
 402         if (be_options.dump_flags & mask)
 403                 dump_ir_graph(irg, suffix);
 404 }
 405
 406 /**
 407  * Prepare a backend graph for code generation and initialize its irg
 408  */
 409 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 410 {
 411         /* don't duplicate locals in backend when dumping... */
 412         ir_remove_dump_flags(ir_dump_flag_consts_local);
 413
 414         dump(DUMP_INITIAL, irg, "begin");
 415
 416         irg->be_data = birg;
 417
 418         memset(birg, 0, sizeof(*birg));
 419         birg->irg = irg;
 420         birg->main_env = env;
 421         obstack_init(&birg->obst);
 422
 423         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 424         edges_activate_kind(irg, EDGE_KIND_DEP);
 425
 426         /* set the current graph (this is important for several firm functions) */
 427         current_ir_graph = irg;
 428
 429         /* we do this before critical edge split. As this produces less returns,
 430            because sometimes (= 164.gzip) multiple returns are slower */
 431         normalize_n_returns(irg);
 432
 433         /* Remove critical edges */
 434         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 435
 436         /* Ensure, that the ir_edges are computed. */
 437         edges_assure(irg);
 438
 439         set_irg_phase_state(irg, phase_backend);
 440         be_info_init_irg(irg);
 441
 442         dump(DUMP_INITIAL, irg, "prepared");
 443 }
 444
 445 int be_timing;
 446
 447 static const char *get_timer_name(be_timer_id_t id)
 448 {
 449         switch (id) {
 450         case T_ABI:            return "abi";
 451         case T_CODEGEN:        return "codegen";
 452         case T_RA_PREPARATION: return "ra_preparation";
 453         case T_SCHED:          return "sched";
 454         case T_CONSTR:         return "constr";
 455         case T_FINISH:         return "finish";
 456         case T_EMIT:           return "emit";
 457         case T_VERIFY:         return "verify";
 458         case T_OTHER:          return "other";
 459         case T_HEIGHTS:        return "heights";
 460         case T_LIVE:           return "live";
 461         case T_EXECFREQ:       return "execfreq";
 462         case T_SSA_CONSTR:     return "ssa_constr";
 463         case T_RA_PROLOG:      return "ra_prolog";
 464         case T_RA_EPILOG:      return "ra_epilog";
 465         case T_RA_CONSTR:      return "ra_constr";
 466         case T_RA_SPILL:       return "ra_spill";
 467         case T_RA_SPILL_APPLY: return "ra_spill_apply";
 468         case T_RA_COLOR:       return "ra_color";
 469         case T_RA_IFG:         return "ra_ifg";
 470         case T_RA_COPYMIN:     return "ra_copymin";
 471         case T_RA_SSA:         return "ra_ssa";
 472         case T_RA_OTHER:       return "ra_other";
 473         }
 474         return "unknown";
 475 }
 476 ir_timer_t *be_timers[T_LAST+1];
 477
 478 void be_lower_for_target(void)
 479 {
 480         int i;
 481
 482         isa_if->lower_for_target();
 483         /* set the phase to low */
 484         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 485                 ir_graph *irg = get_irp_irg(i);
 486                 set_irg_phase_state(irg, phase_low);
 487         }
 488         set_irp_phase_state(phase_low);
 489 }
 490
 491 /**
 492  * The Firm backend main loop.
 493  * Do architecture specific lowering for all graphs
 494  * and call the architecture specific code generator.
 495  *
 496  * @param file_handle   the file handle the output will be written to
 497  * @param cup_name      name of the compilation unit
 498  */
 499 static void be_main_loop(FILE *file_handle, const char *cup_name)
 500 {
 501         static const char suffix[] = ".prof";
 502
 503         int           i, num_birgs, stat_active = 0;
 504         be_main_env_t env;
 505         char          prof_filename[256];
 506         be_irg_t      *birgs;
 507         ir_graph      **irg_list, **backend_irg_list;
 508         arch_env_t    *arch_env;
 509
 510         be_timing = (be_options.timing == BE_TIME_ON);
 511
 512         if (be_timing) {
 513                 for (i = 0; i < T_LAST+1; ++i) {
 514                         be_timers[i] = ir_timer_new();
 515                 }
 516         }
 517
 518         be_init_env(&env, file_handle);
 519         env.cup_name = cup_name;
 520
 521         be_dbg_so(cup_name);
 522         be_dbg_types();
 523
 524         arch_env = env.arch_env;
 525
 526         /* backend may provide an ordered list of irgs where code should be
 527          * generated for */
 528         irg_list         = NEW_ARR_F(ir_graph *, 0);
 529         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 530
 531         /* we might need 1 birg more for instrumentation constructor */
 532         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 533         birgs     = ALLOCAN(be_irg_t, num_birgs + 1);
 534
 535         be_info_init();
 536
 537         /* First: initialize all birgs */
 538         for (i = 0; i < num_birgs; ++i) {
 539                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 540                 initialize_birg(&birgs[i], irg, &env);
 541         }
 542         arch_env_handle_intrinsics(arch_env);
 543         DEL_ARR_F(irg_list);
 544
 545         /*
 546                 Get the filename for the profiling data.
 547                 Beware: '\0' is already included in sizeof(suffix)
 548         */
 549         sprintf(prof_filename, "%.*s%s\n", (int)(sizeof(prof_filename) - sizeof(suffix)), cup_name, suffix);
 550
 551         /*
 552                 Next: Either instruments all irgs with profiling code
 553                 or try to read in profile data for current translation unit.
 554         */
 555         if (be_options.opt_profile) {
 556                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 557                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 558                 num_birgs++;
 559         } else {
 560                 ir_profile_read(prof_filename);
 561         }
 562
 563 #ifdef FIRM_STATISTICS
 564         stat_active = stat_is_active();
 565 #endif /* FIRM_STATISTICS */
 566
 567         /* For all graphs */
 568         for (i = 0; i < num_birgs; ++i) {
 569                 be_irg_t *birg = &birgs[i];
 570                 ir_graph *irg  = birg->irg;
 571                 optimization_state_t state;
 572
 573                 /* set the current graph (this is important for several firm functions) */
 574                 current_ir_graph = irg;
 575
 576                 stat_ev_if {
 577                         stat_ev_ctx_push_fobj("bemain_irg", irg);
 578                         be_stat_ev("bemain_insns_start", be_count_insns(irg));
 579                         be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
 580                 }
 581
 582                 /* stop and reset timers */
 583                 be_timer_push(T_OTHER);
 584
 585                 /* Verify the initial graph */
 586                 be_timer_push(T_VERIFY);
 587                 if (be_options.verify_option == BE_VERIFY_WARN) {
 588                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 589                         be_check_dominance(irg);
 590                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 591                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 592                         assert(be_check_dominance(irg) && "Dominance verification failed");
 593                 }
 594                 be_timer_pop(T_VERIFY);
 595
 596                 /* get a code generator for this graph. */
 597                 arch_env->impl->init_graph(irg);
 598
 599                 /* some transformations need to be done before abi introduce */
 600                 if (arch_env->impl->before_abi != NULL)
 601                         arch_env->impl->before_abi(irg);
 602
 603                 /* implement the ABI conventions. */
 604                 if (!arch_env->custom_abi) {
 605                         be_timer_push(T_ABI);
 606                         be_abi_introduce(irg);
 607                         be_timer_pop(T_ABI);
 608                         dump(DUMP_ABI, irg, "abi");
 609                 }
 610
 611                 /* we have to do cfopt+remove_critical_edges as we can't have Bad-blocks
 612                  * or critical edges in the backend */
 613                 optimize_cf(irg);
 614                 remove_critical_cf_edges(irg);
 615
 616                 /* We often have dead code reachable through out-edges here. So for
 617                  * now we rebuild edges (as we need correct user count for code
 618                  * selection) */
 619                 edges_deactivate(irg);
 620                 edges_activate(irg);
 621
 622                 dump(DUMP_PREPARED, irg, "before-code-selection");
 623
 624                 if (be_options.verify_option == BE_VERIFY_WARN) {
 625                         be_check_dominance(irg);
 626                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 627                         assert(be_check_dominance(irg) && "Dominance verification failed");
 628                 }
 629
 630                 /* perform codeselection */
 631                 be_timer_push(T_CODEGEN);
 632                 if (arch_env->impl->prepare_graph != NULL)
 633                         arch_env->impl->prepare_graph(irg);
 634                 be_timer_pop(T_CODEGEN);
 635
 636                 if (be_options.verify_option == BE_VERIFY_WARN) {
 637                         be_check_dominance(irg);
 638                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 639                         assert(be_check_dominance(irg) && "Dominance verification failed");
 640                 }
 641
 642                 be_timer_push(T_EXECFREQ);
 643                 /**
 644                  * Create execution frequencies from profile data or estimate some
 645                  */
 646                 if (ir_profile_has_data())
 647                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 648                 else {
 649                         /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
 650                          * optimize graph phase merges blocks in the x86 backend */
 651                         edges_deactivate(irg);
 652                         birg->exec_freq = compute_execfreq(irg, 10);
 653                 }
 654                 be_timer_pop(T_EXECFREQ);
 655
 656
 657                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 658                 /* be_live_chk_compare(irg); */
 659
 660                 /* schedule the irg */
 661                 be_timer_push(T_SCHED);
 662                 be_schedule_graph(irg);
 663                 be_timer_pop(T_SCHED);
 664
 665                 dump(DUMP_SCHED, irg, "sched");
 666
 667                 /* check schedule */
 668                 be_timer_push(T_VERIFY);
 669                 be_sched_verify(irg, be_options.verify_option);
 670                 be_timer_pop(T_VERIFY);
 671
 672                 /* introduce patterns to assure constraints */
 673                 be_timer_push(T_CONSTR);
 674                 /* we switch off optimizations here, because they might cause trouble */
 675                 save_optimization_state(&state);
 676                 set_optimize(0);
 677                 set_opt_cse(0);
 678
 679                 /* add Keeps for should_be_different constrained nodes  */
 680                 /* beware: needs schedule due to usage of be_ssa_constr */
 681                 assure_constraints(irg);
 682                 be_timer_pop(T_CONSTR);
 683
 684                 dump(DUMP_SCHED, irg, "assured");
 685
 686                 /* stuff needs to be done after scheduling but before register allocation */
 687                 be_timer_push(T_RA_PREPARATION);
 688                 if (arch_env->impl->before_ra != NULL)
 689                         arch_env->impl->before_ra(irg);
 690                 be_timer_pop(T_RA_PREPARATION);
 691
 692                 /* connect all stack modifying nodes together (see beabi.c) */
 693                 be_timer_push(T_ABI);
 694                 be_abi_fix_stack_nodes(irg);
 695                 be_timer_pop(T_ABI);
 696
 697                 dump(DUMP_SCHED, irg, "fix_stack");
 698
 699                 /* check schedule */
 700                 be_timer_push(T_VERIFY);
 701                 be_sched_verify(irg, be_options.verify_option);
 702                 be_timer_pop(T_VERIFY);
 703
 704                 stat_ev_if {
 705                         stat_ev_dbl("bemain_costs_before_ra",
 706                                         be_estimate_irg_costs(irg, birg->exec_freq));
 707                         be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
 708                         be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
 709                 }
 710
 711                 /* Do register allocation */
 712                 be_allocate_registers(irg);
 713
 714 #ifdef FIRM_STATISTICS
 715                 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
 716 #endif
 717
 718                 dump(DUMP_RA, irg, "ra");
 719
 720                 /* let the code generator prepare the graph for emitter */
 721                 be_timer_push(T_FINISH);
 722                 if (arch_env->impl->after_ra != NULL)
 723                         arch_env->impl->after_ra(irg);
 724                 be_timer_pop(T_FINISH);
 725
 726                 /* fix stack offsets */
 727                 be_timer_push(T_ABI);
 728                 be_abi_fix_stack_nodes(irg);
 729                 be_remove_dead_nodes_from_schedule(irg);
 730                 be_abi_fix_stack_bias(irg);
 731                 be_timer_pop(T_ABI);
 732
 733                 dump(DUMP_SCHED, irg, "fix_stack_after_ra");
 734
 735                 be_timer_push(T_FINISH);
 736                 if (arch_env->impl->finish != NULL)
 737                         arch_env->impl->finish(irg);
 738                 be_timer_pop(T_FINISH);
 739
 740                 dump(DUMP_FINAL, irg, "finish");
 741
 742                 stat_ev_if {
 743                         be_stat_ev("bemain_insns_finish", be_count_insns(irg));
 744                         be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
 745                 }
 746
 747                 /* check schedule and register allocation */
 748                 be_timer_push(T_VERIFY);
 749                 if (be_options.verify_option == BE_VERIFY_WARN) {
 750                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 751                         be_check_dominance(irg);
 752                         be_verify_schedule(irg);
 753                         be_verify_register_allocation(irg);
 754                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 755                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 756                         assert(be_check_dominance(irg) && "Dominance verification failed");
 757                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 758                         assert(be_verify_register_allocation(irg)
 759                                && "register allocation verification failed");
 760
 761                 }
 762                 be_timer_pop(T_VERIFY);
 763
 764                 /* emit assembler code */
 765                 be_timer_push(T_EMIT);
 766                 if (arch_env->impl->emit != NULL)
 767                         arch_env->impl->emit(irg);
 768                 be_timer_pop(T_EMIT);
 769
 770                 dump(DUMP_FINAL, irg, "end");
 771
 772                 if (!arch_env->custom_abi) {
 773                         be_timer_push(T_ABI);
 774                         be_abi_free(irg);
 775                         be_timer_pop(T_ABI);
 776                 }
 777
 778                 restore_optimization_state(&state);
 779
 780                 be_timer_pop(T_OTHER);
 781
 782                 if (be_timing) {
 783                         be_timer_id_t t;
 784                         if (stat_ev_enabled) {
 785                                 for (t = T_FIRST; t < T_LAST+1; ++t) {
 786                                         char buf[128];
 787                                         snprintf(buf, sizeof(buf), "bemain_time_%s",
 788                                                  get_timer_name(t));
 789                                         stat_ev_dbl(buf, ir_timer_elapsed_usec(be_timers[i]));
 790                                 }
 791                         } else {
 792                                 printf("==>> IRG %s <<==\n",
 793                                        get_entity_name(get_irg_entity(irg)));
 794                                 for (t = T_FIRST; t < T_LAST+1; ++t) {
 795                                         double val = ir_timer_elapsed_usec(be_timers[t]) / 1000.0;
 796                                         printf("%-20s: %8.3lf msec\n", get_timer_name(t), val);
 797                                 }
 798                         }
 799                         for (t = T_FIRST; t < T_LAST+1; ++t) {
 800                                 ir_timer_stop(be_timers[t]);
 801                                 ir_timer_reset(be_timers[t]);
 802                         }
 803                 }
 804
 805                 be_free_birg(irg);
 806                 stat_ev_ctx_pop("bemain_irg");
 807         }
 808         ir_profile_free();
 809         be_done_env(&env);
 810
 811         be_info_free();
 812 }
 813
 814 /* Main interface to the frontend. */
 815 void be_main(FILE *file_handle, const char *cup_name)
 816 {
 817         ir_timer_t *t = NULL;
 818
 819         /* The user specified another config file to read. do that now. */
 820         if (config_file[0] != '\0') {
 821                 FILE *f = fopen(config_file, "rt");
 822
 823                 if (f != NULL) {
 824                         lc_opt_from_file(config_file, f, NULL);
 825                         fclose(f);
 826                 } else {
 827                         fprintf(stderr, "Warning: Cannot open config file '%s'\n", config_file);
 828                 }
 829         }
 830
 831         if (be_options.timing == BE_TIME_ON) {
 832                 t = ir_timer_new();
 833
 834                 if (ir_timer_enter_high_priority()) {
 835                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 836                 }
 837
 838                 ir_timer_reset_and_start(t);
 839         }
 840
 841 #ifdef FIRM_STATISTICS
 842         if (be_options.statev) {
 843                 const char *dot = strrchr(cup_name, '.');
 844                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 845                 char       *buf = ALLOCAN(char, pos - cup_name + 1);
 846                 strncpy(buf, cup_name, pos - cup_name);
 847                 buf[pos - cup_name] = '\0';
 848
 849                 be_options.statev = 1;
 850                 stat_ev_begin(buf, be_options.filtev);
 851                 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
 852         }
 853 #endif
 854
 855         be_main_loop(file_handle, cup_name);
 856
 857         if (be_options.timing == BE_TIME_ON) {
 858                 ir_timer_stop(t);
 859                 ir_timer_leave_high_priority();
 860                 stat_ev_if {
 861                         stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
 862                 } else {
 863                         double val = ir_timer_elapsed_usec(t) / 1000.0;
 864                         printf("%-20s: %8.3lf msec\n", "BEMAINLOOP", val);
 865                 }
 866         }
 867
 868 #ifdef FIRM_STATISTICS
 869         if (be_options.statev) {
 870                 stat_ev_ctx_pop("bemain_compilation_unit");
 871                 stat_ev_end();
 872         }
 873 #endif
 874 }
 875
 876 static int do_lower_for_target(ir_prog *irp, void *context)
 877 {
 878         be_lower_for_target();
 879         (void) context;
 880         (void) irp;
 881         return 0;
 882 }
 883
 884 ir_prog_pass_t *lower_for_target_pass(const char *name)
 885 {
 886         ir_prog_pass_t *pass = XMALLOCZ(ir_prog_pass_t);
 887         return def_prog_pass_constructor(pass,
 888                                          name ? name : "lower_for_target",
 889                                          do_lower_for_target);
 890 }