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

   1 /*
   2  * Copyright (C) 1995-2011 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         BE_VERIFY_WARN,                    /* verification level: warn */
  87         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  88         "cplex",                           /* ilp solver */
  89         0,                                 /* enable statistic event dumping */
  90         "",                                /* print stat events */
  91 };
  92
  93 /* back end instruction set architecture to use */
  94 static const arch_isa_if_t *isa_if = NULL;
  95
  96 /* possible dumping options */
  97 static const lc_opt_enum_mask_items_t dump_items[] = {
  98         { "none",       DUMP_NONE },
  99         { "initial",    DUMP_INITIAL },
 100         { "abi",        DUMP_ABI    },
 101         { "sched",      DUMP_SCHED  },
 102         { "prepared",   DUMP_PREPARED },
 103         { "regalloc",   DUMP_RA },
 104         { "final",      DUMP_FINAL },
 105         { "be",         DUMP_BE },
 106         { "all",        2 * DUMP_BE - 1 },
 107         { NULL,         0 }
 108 };
 109
 110 /* verify options. */
 111 static const lc_opt_enum_int_items_t verify_items[] = {
 112         { "off",    BE_VERIFY_OFF    },
 113         { "warn",   BE_VERIFY_WARN   },
 114         { "assert", BE_VERIFY_ASSERT },
 115         { NULL,     0 }
 116 };
 117
 118 static lc_opt_enum_mask_var_t dump_var = {
 119         &be_options.dump_flags, dump_items
 120 };
 121
 122 static lc_opt_enum_int_var_t verify_var = {
 123         &be_options.verify_option, verify_items
 124 };
 125
 126 static const lc_opt_table_entry_t be_main_options[] = {
 127         LC_OPT_ENT_ENUM_MASK("dump",       "dump irg on several occasions",                       &dump_var),
 128         LC_OPT_ENT_BOOL     ("omitfp",     "omit frame pointer",                                  &be_options.omit_fp),
 129         LC_OPT_ENT_BOOL     ("pic",        "create PIC code",                                     &be_options.pic),
 130         LC_OPT_ENT_ENUM_PTR ("verify",     "verify the backend irg",                              &verify_var),
 131         LC_OPT_ENT_BOOL     ("time",       "get backend timing statistics",                       &be_options.timing),
 132         LC_OPT_ENT_BOOL     ("profile",    "instrument the code for execution count profiling",   &be_options.opt_profile),
 133 #ifdef FIRM_STATISTICS
 134         LC_OPT_ENT_BOOL     ("statev",     "dump statistic events",                               &be_options.statev),
 135         LC_OPT_ENT_STR      ("filtev",     "filter for stat events (regex if support is active",  &be_options.filtev, sizeof(be_options.filtev)),
 136 #endif
 137
 138 #ifdef WITH_ILP
 139         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 140         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 141 #endif /* WITH_ILP */
 142         LC_OPT_LAST
 143 };
 144
 145 static be_module_list_entry_t *isa_ifs = NULL;
 146
 147
 148 asm_constraint_flags_t asm_constraint_flags[256];
 149
 150 void be_init_default_asm_constraint_flags(void)
 151 {
 152         asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 153         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 154         asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 155                 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
 156         asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 157                 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
 158         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 159
 160         asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
 161                 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
 162         asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
 163                 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
 164
 165         asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 166         asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 167         asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 168         asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 169         asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 170         asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 171         asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 172         asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 173         asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 174         asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 175         asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 176         asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 177         asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 178         asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 179
 180         asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 181         asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 182         asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 183         asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 184         asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 185
 186         asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 187         asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 188         asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 189         asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 190         asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 191         asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 192         asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 193         asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 194         asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 195         asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 196         asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 197
 198         asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
 199                 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
 200                 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 201
 202         /* these should have been catched by the parsing code already */
 203         asm_constraint_flags['#']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 204         asm_constraint_flags['*']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 205         asm_constraint_flags[' ']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 206         asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 207         asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 208         asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 209 }
 210
 211 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
 212 {
 213         asm_constraint_flags_t  flags = ASM_CONSTRAINT_FLAG_NONE;
 214         const char             *c;
 215         asm_constraint_flags_t  tflags;
 216
 217         for (c = constraint; *c != '\0'; ++c) {
 218                 switch (*c) {
 219                 case '#':
 220                         /* 'comment' stuff */
 221                         while (*c != 0 && *c != ',')
 222                                 ++c;
 223                         break;
 224                 case '*':
 225                         /* 'comment' character */
 226                         ++c;
 227                         break;
 228                 case ' ':
 229                 case '\t':
 230                 case '\n':
 231                 case '\r':
 232                         break;
 233                 default:
 234                         tflags = asm_constraint_flags[(int) *c];
 235                         if (tflags != 0) {
 236                                 flags |= tflags;
 237                         } else {
 238                                 flags |= isa_if->parse_asm_constraint(&c);
 239                         }
 240                         break;
 241                 }
 242         }
 243
 244         if ((
 245                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
 246                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
 247             ) || (
 248                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
 249                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
 250             )) {
 251                 flags |= ASM_CONSTRAINT_FLAG_INVALID;
 252         }
 253         if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ     |
 254                        ASM_CONSTRAINT_FLAG_MODIFIER_WRITE    |
 255                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
 256                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
 257             )) {
 258                 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
 259         }
 260
 261         return flags;
 262 }
 263
 264 int be_is_valid_clobber(const char *clobber)
 265 {
 266         /* memory is a valid clobber. (the frontend has to detect this case too,
 267          * because it has to add memory edges to the asm) */
 268         if (strcmp(clobber, "memory") == 0)
 269                 return 1;
 270         /* cc (condition code) is always valid */
 271         if (strcmp(clobber, "cc") == 0)
 272                 return 1;
 273
 274         return isa_if->is_valid_clobber(clobber);
 275 }
 276
 277 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 278 {
 279         if (isa_if == NULL)
 280                 isa_if = isa;
 281
 282         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 283 }
 284
 285 void be_opt_register(void)
 286 {
 287         lc_opt_entry_t *be_grp;
 288         static int run_once = 0;
 289
 290         if (run_once)
 291                 return;
 292         run_once = 1;
 293
 294         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 295         lc_opt_add_table(be_grp, be_main_options);
 296
 297         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 298                                &isa_ifs, (void**) &isa_if);
 299
 300         be_init_modules();
 301 }
 302
 303 /* Parse one argument. */
 304 int be_parse_arg(const char *arg)
 305 {
 306         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 307         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 308                 lc_opt_print_help_for_entry(be_grp, '-', stdout);
 309                 return -1;
 310         }
 311         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 312 }
 313
 314 /* Perform schedule verification if requested. */
 315 static void be_sched_verify(ir_graph *irg, int verify_opt)
 316 {
 317         if (verify_opt == BE_VERIFY_WARN) {
 318                 be_verify_schedule(irg);
 319         } else if (verify_opt == BE_VERIFY_ASSERT) {
 320                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 321         }
 322 }
 323
 324 /* Initialize the Firm backend. Must be run first in init_firm()! */
 325 void firm_be_init(void)
 326 {
 327         be_opt_register();
 328         be_init_modules();
 329 }
 330
 331 /* Finalize the Firm backend. */
 332 void firm_be_finish(void)
 333 {
 334         be_quit_modules();
 335 }
 336
 337 /* Returns the backend parameter */
 338 const backend_params *be_get_backend_param(void)
 339 {
 340         return isa_if->get_params();
 341 }
 342
 343 /**
 344  * Initializes the main environment for the backend.
 345  *
 346  * @param env          an empty environment
 347  * @param file_handle  the file handle where the output will be written to
 348  */
 349 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 350 {
 351         memset(env, 0, sizeof(*env));
 352         env->options              = &be_options;
 353         env->ent_trampoline_map   = pmap_create();
 354         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 355         env->ent_pic_symbol_map   = pmap_create();
 356         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 357
 358         remove_irp_type(env->pic_trampolines_type);
 359         remove_irp_type(env->pic_symbols_type);
 360         set_class_final(env->pic_trampolines_type, 1);
 361
 362         memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
 363         env->arch_env = arch_env_init(isa_if, file_handle, env);
 364
 365         be_dbg_open();
 366         return env;
 367 }
 368
 369 /**
 370  * Called when the be_main_env_t can be destroyed.
 371  */
 372 static void be_done_env(be_main_env_t *env)
 373 {
 374         arch_env_done(env->arch_env);
 375         be_dbg_close();
 376
 377         pmap_destroy(env->ent_trampoline_map);
 378         pmap_destroy(env->ent_pic_symbol_map);
 379         free_type(env->pic_trampolines_type);
 380         free_type(env->pic_symbols_type);
 381 }
 382
 383 /**
 384  * A wrapper around a firm dumper. Dumps only, if
 385  * flags are enabled.
 386  *
 387  * @param mask    a bitmask containing the reason what will be dumped
 388  * @param irg     the IR graph to dump
 389  * @param suffix  the suffix for the dumper
 390  * @param dumper  the dumper to be called
 391  */
 392 static void dump(int mask, ir_graph *irg, const char *suffix)
 393 {
 394         if (be_options.dump_flags & mask)
 395                 dump_ir_graph(irg, suffix);
 396 }
 397
 398 /**
 399  * Prepare a backend graph for code generation and initialize its irg
 400  */
 401 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 402 {
 403         /* don't duplicate locals in backend when dumping... */
 404         ir_remove_dump_flags(ir_dump_flag_consts_local);
 405
 406         dump(DUMP_INITIAL, irg, "begin");
 407
 408         irg->be_data = birg;
 409
 410         memset(birg, 0, sizeof(*birg));
 411         birg->irg = irg;
 412         birg->main_env = env;
 413         obstack_init(&birg->obst);
 414
 415         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 416         edges_activate_kind(irg, EDGE_KIND_DEP);
 417
 418         /* set the current graph (this is important for several firm functions) */
 419         current_ir_graph = irg;
 420
 421         /* we do this before critical edge split. As this produces less returns,
 422            because sometimes (= 164.gzip) multiple returns are slower */
 423         normalize_n_returns(irg);
 424
 425         /* Remove critical edges */
 426         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 427
 428         /* Ensure, that the ir_edges are computed. */
 429         edges_assure(irg);
 430
 431         set_irg_phase_state(irg, phase_backend);
 432         be_info_init_irg(irg);
 433
 434         dump(DUMP_INITIAL, irg, "prepared");
 435 }
 436
 437 int be_timing;
 438
 439 static const char *get_timer_name(be_timer_id_t id)
 440 {
 441         switch (id) {
 442         case T_ABI:            return "abi";
 443         case T_CODEGEN:        return "codegen";
 444         case T_RA_PREPARATION: return "ra_preparation";
 445         case T_SCHED:          return "sched";
 446         case T_CONSTR:         return "constr";
 447         case T_FINISH:         return "finish";
 448         case T_EMIT:           return "emit";
 449         case T_VERIFY:         return "verify";
 450         case T_OTHER:          return "other";
 451         case T_HEIGHTS:        return "heights";
 452         case T_LIVE:           return "live";
 453         case T_EXECFREQ:       return "execfreq";
 454         case T_SSA_CONSTR:     return "ssa_constr";
 455         case T_RA_PROLOG:      return "ra_prolog";
 456         case T_RA_EPILOG:      return "ra_epilog";
 457         case T_RA_CONSTR:      return "ra_constr";
 458         case T_RA_SPILL:       return "ra_spill";
 459         case T_RA_SPILL_APPLY: return "ra_spill_apply";
 460         case T_RA_COLOR:       return "ra_color";
 461         case T_RA_IFG:         return "ra_ifg";
 462         case T_RA_COPYMIN:     return "ra_copymin";
 463         case T_RA_SSA:         return "ra_ssa";
 464         case T_RA_OTHER:       return "ra_other";
 465         }
 466         return "unknown";
 467 }
 468 ir_timer_t *be_timers[T_LAST+1];
 469
 470 void be_lower_for_target(void)
 471 {
 472         size_t i;
 473
 474         isa_if->lower_for_target();
 475         /* set the phase to low */
 476         for (i = get_irp_n_irgs(); i > 0;) {
 477                 ir_graph *irg = get_irp_irg(--i);
 478                 set_irg_phase_state(irg, phase_low);
 479         }
 480         set_irp_phase_state(phase_low);
 481 }
 482
 483 /**
 484  * The Firm backend main loop.
 485  * Do architecture specific lowering for all graphs
 486  * and call the architecture specific code generator.
 487  *
 488  * @param file_handle   the file handle the output will be written to
 489  * @param cup_name      name of the compilation unit
 490  */
 491 static void be_main_loop(FILE *file_handle, const char *cup_name)
 492 {
 493         static const char suffix[] = ".prof";
 494
 495         size_t        i, num_birgs;
 496         int           stat_active = 0;
 497         be_main_env_t env;
 498         char          prof_filename[256];
 499         be_irg_t      *birgs;
 500         ir_graph      **irg_list, **backend_irg_list;
 501         arch_env_t    *arch_env;
 502
 503         be_timing = (be_options.timing == BE_TIME_ON);
 504
 505         if (be_timing) {
 506                 for (i = 0; i < T_LAST+1; ++i) {
 507                         be_timers[i] = ir_timer_new();
 508                 }
 509         }
 510
 511         be_init_env(&env, file_handle);
 512         env.cup_name = cup_name;
 513
 514         be_dbg_so(cup_name);
 515         be_dbg_types();
 516
 517         arch_env = env.arch_env;
 518
 519         /* backend may provide an ordered list of irgs where code should be
 520          * generated for */
 521         irg_list         = NEW_ARR_F(ir_graph *, 0);
 522         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 523
 524         /* we might need 1 birg more for instrumentation constructor */
 525         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 526         birgs     = ALLOCAN(be_irg_t, num_birgs + 1);
 527
 528         be_info_init();
 529
 530         /* First: initialize all birgs */
 531         for (i = 0; i < num_birgs; ++i) {
 532                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 533                 initialize_birg(&birgs[i], irg, &env);
 534         }
 535         arch_env_handle_intrinsics(arch_env);
 536         DEL_ARR_F(irg_list);
 537
 538         /*
 539                 Get the filename for the profiling data.
 540                 Beware: '\0' is already included in sizeof(suffix)
 541         */
 542         sprintf(prof_filename, "%.*s%s\n", (int)(sizeof(prof_filename) - sizeof(suffix)), cup_name, suffix);
 543
 544         /*
 545                 Next: Either instruments all irgs with profiling code
 546                 or try to read in profile data for current translation unit.
 547         */
 548         if (be_options.opt_profile) {
 549                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 550                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 551                 num_birgs++;
 552         } else {
 553                 ir_profile_read(prof_filename);
 554         }
 555
 556 #ifdef FIRM_STATISTICS
 557         stat_active = stat_is_active();
 558 #endif /* FIRM_STATISTICS */
 559
 560         /* For all graphs */
 561         for (i = 0; i < num_birgs; ++i) {
 562                 be_irg_t *birg = &birgs[i];
 563                 ir_graph *irg  = birg->irg;
 564                 optimization_state_t state;
 565
 566                 /* set the current graph (this is important for several firm functions) */
 567                 current_ir_graph = irg;
 568
 569                 stat_ev_if {
 570                         stat_ev_ctx_push_fobj("bemain_irg", irg);
 571                         be_stat_ev("bemain_insns_start", be_count_insns(irg));
 572                         be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
 573                 }
 574
 575                 /* stop and reset timers */
 576                 be_timer_push(T_OTHER);
 577
 578                 /* Verify the initial graph */
 579                 be_timer_push(T_VERIFY);
 580                 if (be_options.verify_option == BE_VERIFY_WARN) {
 581                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 582                         be_check_dominance(irg);
 583                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 584                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 585                         assert(be_check_dominance(irg) && "Dominance verification failed");
 586                 }
 587                 be_timer_pop(T_VERIFY);
 588
 589                 /* get a code generator for this graph. */
 590                 arch_env->impl->init_graph(irg);
 591
 592                 /* some transformations need to be done before abi introduce */
 593                 if (arch_env->impl->before_abi != NULL)
 594                         arch_env->impl->before_abi(irg);
 595
 596                 /* implement the ABI conventions. */
 597                 if (!arch_env->custom_abi) {
 598                         be_timer_push(T_ABI);
 599                         be_abi_introduce(irg);
 600                         be_timer_pop(T_ABI);
 601                         dump(DUMP_ABI, irg, "abi");
 602                 }
 603
 604                 /* we have to do cfopt+remove_critical_edges as we can't have Bad-blocks
 605                  * or critical edges in the backend */
 606                 optimize_cf(irg);
 607                 remove_critical_cf_edges(irg);
 608
 609                 /* We often have dead code reachable through out-edges here. So for
 610                  * now we rebuild edges (as we need correct user count for code
 611                  * selection) */
 612                 edges_deactivate(irg);
 613                 edges_activate(irg);
 614
 615                 dump(DUMP_PREPARED, irg, "before-code-selection");
 616
 617                 if (be_options.verify_option == BE_VERIFY_WARN) {
 618                         be_check_dominance(irg);
 619                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 620                         assert(be_check_dominance(irg) && "Dominance verification failed");
 621                 }
 622
 623                 /* perform codeselection */
 624                 be_timer_push(T_CODEGEN);
 625                 if (arch_env->impl->prepare_graph != NULL)
 626                         arch_env->impl->prepare_graph(irg);
 627                 be_timer_pop(T_CODEGEN);
 628
 629                 if (be_options.verify_option == BE_VERIFY_WARN) {
 630                         be_check_dominance(irg);
 631                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 632                         assert(be_check_dominance(irg) && "Dominance verification failed");
 633                 }
 634
 635                 dump(DUMP_PREPARED, irg, "code-selection");
 636
 637                 be_timer_push(T_EXECFREQ);
 638                 /**
 639                  * Create execution frequencies from profile data or estimate some
 640                  */
 641                 if (ir_profile_has_data())
 642                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 643                 else {
 644                         /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
 645                          * optimize graph phase merges blocks in the x86 backend */
 646                         edges_deactivate(irg);
 647                         birg->exec_freq = compute_execfreq(irg, 10);
 648                 }
 649                 be_timer_pop(T_EXECFREQ);
 650
 651
 652                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 653                 /* be_live_chk_compare(irg); */
 654
 655                 /* schedule the irg */
 656                 be_timer_push(T_SCHED);
 657                 be_schedule_graph(irg);
 658                 be_timer_pop(T_SCHED);
 659
 660                 dump(DUMP_SCHED, irg, "sched");
 661
 662                 /* check schedule */
 663                 be_timer_push(T_VERIFY);
 664                 be_sched_verify(irg, be_options.verify_option);
 665                 be_timer_pop(T_VERIFY);
 666
 667                 /* introduce patterns to assure constraints */
 668                 be_timer_push(T_CONSTR);
 669                 /* we switch off optimizations here, because they might cause trouble */
 670                 save_optimization_state(&state);
 671                 set_optimize(0);
 672                 set_opt_cse(0);
 673
 674                 /* add Keeps for should_be_different constrained nodes  */
 675                 /* beware: needs schedule due to usage of be_ssa_constr */
 676                 assure_constraints(irg);
 677                 be_timer_pop(T_CONSTR);
 678
 679                 dump(DUMP_SCHED, irg, "assured");
 680
 681                 /* stuff needs to be done after scheduling but before register allocation */
 682                 be_timer_push(T_RA_PREPARATION);
 683                 if (arch_env->impl->before_ra != NULL)
 684                         arch_env->impl->before_ra(irg);
 685                 be_timer_pop(T_RA_PREPARATION);
 686
 687                 /* connect all stack modifying nodes together (see beabi.c) */
 688                 be_timer_push(T_ABI);
 689                 be_abi_fix_stack_nodes(irg);
 690                 be_timer_pop(T_ABI);
 691
 692                 dump(DUMP_SCHED, irg, "fix_stack");
 693
 694                 /* check schedule */
 695                 be_timer_push(T_VERIFY);
 696                 be_sched_verify(irg, be_options.verify_option);
 697                 be_timer_pop(T_VERIFY);
 698
 699                 stat_ev_if {
 700                         stat_ev_dbl("bemain_costs_before_ra",
 701                                         be_estimate_irg_costs(irg, birg->exec_freq));
 702                         be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
 703                         be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
 704                 }
 705
 706                 /* Do register allocation */
 707                 be_allocate_registers(irg);
 708
 709 #ifdef FIRM_STATISTICS
 710                 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
 711 #endif
 712
 713                 dump(DUMP_RA, irg, "ra");
 714
 715                 /* let the code generator prepare the graph for emitter */
 716                 be_timer_push(T_FINISH);
 717                 if (arch_env->impl->after_ra != NULL)
 718                         arch_env->impl->after_ra(irg);
 719                 be_timer_pop(T_FINISH);
 720
 721                 /* fix stack offsets */
 722                 be_timer_push(T_ABI);
 723                 be_abi_fix_stack_nodes(irg);
 724                 be_remove_dead_nodes_from_schedule(irg);
 725                 be_abi_fix_stack_bias(irg);
 726                 be_timer_pop(T_ABI);
 727
 728                 dump(DUMP_SCHED, irg, "fix_stack_after_ra");
 729
 730                 be_timer_push(T_FINISH);
 731                 if (arch_env->impl->finish != NULL)
 732                         arch_env->impl->finish(irg);
 733                 be_timer_pop(T_FINISH);
 734
 735                 dump(DUMP_FINAL, irg, "finish");
 736
 737                 stat_ev_if {
 738                         be_stat_ev("bemain_insns_finish", be_count_insns(irg));
 739                         be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
 740                 }
 741
 742                 /* check schedule and register allocation */
 743                 be_timer_push(T_VERIFY);
 744                 if (be_options.verify_option == BE_VERIFY_WARN) {
 745                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 746                         be_check_dominance(irg);
 747                         be_verify_schedule(irg);
 748                         be_verify_register_allocation(irg);
 749                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 750                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 751                         assert(be_check_dominance(irg) && "Dominance verification failed");
 752                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 753                         assert(be_verify_register_allocation(irg)
 754                                && "register allocation verification failed");
 755
 756                 }
 757                 be_timer_pop(T_VERIFY);
 758
 759                 /* emit assembler code */
 760                 be_timer_push(T_EMIT);
 761                 if (arch_env->impl->emit != NULL)
 762                         arch_env->impl->emit(irg);
 763                 be_timer_pop(T_EMIT);
 764
 765                 dump(DUMP_FINAL, irg, "end");
 766
 767                 if (!arch_env->custom_abi) {
 768                         be_timer_push(T_ABI);
 769                         be_abi_free(irg);
 770                         be_timer_pop(T_ABI);
 771                 }
 772
 773                 restore_optimization_state(&state);
 774
 775                 be_timer_pop(T_OTHER);
 776
 777                 if (be_timing) {
 778                         be_timer_id_t t;
 779                         if (stat_ev_enabled) {
 780                                 for (t = T_FIRST; t < T_LAST+1; ++t) {
 781                                         char buf[128];
 782                                         snprintf(buf, sizeof(buf), "bemain_time_%s",
 783                                                  get_timer_name(t));
 784                                         stat_ev_dbl(buf, ir_timer_elapsed_usec(be_timers[i]));
 785                                 }
 786                         } else {
 787                                 printf("==>> IRG %s <<==\n",
 788                                        get_entity_name(get_irg_entity(irg)));
 789                                 for (t = T_FIRST; t < T_LAST+1; ++t) {
 790                                         double val = ir_timer_elapsed_usec(be_timers[t]) / 1000.0;
 791                                         printf("%-20s: %8.3lf msec\n", get_timer_name(t), val);
 792                                 }
 793                         }
 794                         for (t = T_FIRST; t < T_LAST+1; ++t) {
 795                                 ir_timer_stop(be_timers[t]);
 796                                 ir_timer_reset(be_timers[t]);
 797                         }
 798                 }
 799
 800                 be_free_birg(irg);
 801                 stat_ev_ctx_pop("bemain_irg");
 802         }
 803         ir_profile_free();
 804         be_done_env(&env);
 805
 806         be_info_free();
 807 }
 808
 809 /* Main interface to the frontend. */
 810 void be_main(FILE *file_handle, const char *cup_name)
 811 {
 812         ir_timer_t *t = NULL;
 813
 814         if (be_options.timing == BE_TIME_ON) {
 815                 t = ir_timer_new();
 816
 817                 if (ir_timer_enter_high_priority()) {
 818                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 819                 }
 820
 821                 ir_timer_reset_and_start(t);
 822         }
 823
 824 #ifdef FIRM_STATISTICS
 825         if (be_options.statev) {
 826                 const char *dot = strrchr(cup_name, '.');
 827                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 828                 char       *buf = ALLOCAN(char, pos - cup_name + 1);
 829                 strncpy(buf, cup_name, pos - cup_name);
 830                 buf[pos - cup_name] = '\0';
 831
 832                 be_options.statev = 1;
 833                 stat_ev_begin(buf, be_options.filtev);
 834                 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
 835         }
 836 #endif
 837
 838         be_main_loop(file_handle, cup_name);
 839
 840         if (be_options.timing == BE_TIME_ON) {
 841                 ir_timer_stop(t);
 842                 ir_timer_leave_high_priority();
 843                 stat_ev_if {
 844                         stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
 845                 } else {
 846                         double val = ir_timer_elapsed_usec(t) / 1000.0;
 847                         printf("%-20s: %8.3lf msec\n", "BEMAINLOOP", val);
 848                 }
 849         }
 850
 851 #ifdef FIRM_STATISTICS
 852         if (be_options.statev) {
 853                 stat_ev_ctx_pop("bemain_compilation_unit");
 854                 stat_ev_end();
 855         }
 856 #endif
 857 }
 858
 859 static int do_lower_for_target(ir_prog *irp, void *context)
 860 {
 861         be_lower_for_target();
 862         (void) context;
 863         (void) irp;
 864         return 0;
 865 }
 866
 867 ir_prog_pass_t *lower_for_target_pass(const char *name)
 868 {
 869         ir_prog_pass_t *pass = XMALLOCZ(ir_prog_pass_t);
 870         return def_prog_pass_constructor(pass,
 871                                          name ? name : "lower_for_target",
 872                                          do_lower_for_target);
 873 }