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 "beschedmris.h"
  72 #include "bestat.h"
  73 #include "beverify.h"
  74 #include "be_dbgout.h"
  75 #include "beirg.h"
  76 #include "bestack.h"
  77
  78 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
  79
  80 /* options visible for anyone */
  81 static be_options_t be_options = {
  82         DUMP_NONE,                         /* dump flags */
  83         BE_TIME_OFF,                       /* no timing */
  84         0,                                 /* no opt profile */
  85         0,                                 /* try to omit frame pointer */
  86         0,                                 /* create PIC code */
  87         0,                                 /* create gprof compatible profiling code */
  88         BE_VERIFY_WARN,                    /* verification level: warn */
  89         "linux",                           /* target OS name */
  90         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  91         "cplex",                           /* ilp solver */
  92         0,                                 /* enable statistic event dumping */
  93         "",                                /* print stat events */
  94 };
  95
  96 /* config file. */
  97 static char config_file[256] = { 0 };
  98
  99 /* back end instruction set architecture to use */
 100 static const arch_isa_if_t *isa_if = NULL;
 101
 102 /* possible dumping options */
 103 static const lc_opt_enum_mask_items_t dump_items[] = {
 104         { "none",       DUMP_NONE },
 105         { "initial",    DUMP_INITIAL },
 106         { "abi",        DUMP_ABI    },
 107         { "sched",      DUMP_SCHED  },
 108         { "prepared",   DUMP_PREPARED },
 109         { "regalloc",   DUMP_RA },
 110         { "final",      DUMP_FINAL },
 111         { "be",         DUMP_BE },
 112         { "all",        2 * DUMP_BE - 1 },
 113         { NULL,         0 }
 114 };
 115
 116 /* verify options. */
 117 static const lc_opt_enum_int_items_t verify_items[] = {
 118         { "off",    BE_VERIFY_OFF    },
 119         { "warn",   BE_VERIFY_WARN   },
 120         { "assert", BE_VERIFY_ASSERT },
 121         { NULL,     0 }
 122 };
 123
 124 static lc_opt_enum_mask_var_t dump_var = {
 125         &be_options.dump_flags, dump_items
 126 };
 127
 128 static lc_opt_enum_int_var_t verify_var = {
 129         &be_options.verify_option, verify_items
 130 };
 131
 132 static const lc_opt_table_entry_t be_main_options[] = {
 133         LC_OPT_ENT_STR      ("config",     "read another config file containing backend options", config_file, sizeof(config_file)),
 134         LC_OPT_ENT_ENUM_MASK("dump",       "dump irg on several occasions",                       &dump_var),
 135         LC_OPT_ENT_BOOL     ("omitfp",     "omit frame pointer",                                  &be_options.omit_fp),
 136         LC_OPT_ENT_BOOL     ("pic",        "create PIC code",                                     &be_options.pic),
 137         LC_OPT_ENT_BOOL     ("gprof",      "create gprof profiling code",                         &be_options.gprof),
 138         LC_OPT_ENT_ENUM_PTR ("verify",     "verify the backend irg",                              &verify_var),
 139         LC_OPT_ENT_BOOL     ("time",       "get backend timing statistics",                       &be_options.timing),
 140         LC_OPT_ENT_BOOL     ("profile",    "instrument the code for execution count profiling",   &be_options.opt_profile),
 141         LC_OPT_ENT_STR      ("os",         "specify target operating system",                     &be_options.target_os, sizeof(be_options.target_os)),
 142 #ifdef FIRM_STATISTICS
 143         LC_OPT_ENT_BOOL     ("statev",     "dump statistic events",                               &be_options.statev),
 144         LC_OPT_ENT_STR      ("filtev",     "filter for stat events (regex if support is active",  &be_options.filtev, sizeof(be_options.filtev)),
 145 #endif
 146
 147 #ifdef WITH_ILP
 148         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 149         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 150 #endif /* WITH_ILP */
 151         LC_OPT_LAST
 152 };
 153
 154 static be_module_list_entry_t *isa_ifs = NULL;
 155
 156
 157 unsigned short asm_constraint_flags[256];
 158
 159 void be_init_default_asm_constraint_flags(void)
 160 {
 161         asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 162         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 163         asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 164                 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
 165         asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 166                 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
 167         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 168
 169         asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
 170                 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
 171         asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
 172                 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
 173
 174         asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 175         asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 176         asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 177         asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 178         asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 179         asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 180         asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 181         asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 182         asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 183         asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 184         asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 185         asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 186         asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 187         asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 188
 189         asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 190         asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 191         asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 192         asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 193         asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 194
 195         asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 196         asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 197         asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 198         asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 199         asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 200         asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 201         asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 202         asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 203         asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 204         asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 205         asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 206
 207         asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
 208                 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
 209                 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 210
 211         /* these should have been catched by the parsing code already */
 212         asm_constraint_flags['#']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 213         asm_constraint_flags['*']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 214         asm_constraint_flags[' ']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 215         asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 216         asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 217         asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 218 }
 219
 220 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
 221 {
 222         asm_constraint_flags_t  flags = 0;
 223         const char             *c;
 224         asm_constraint_flags_t  tflags;
 225
 226         for (c = constraint; *c != '\0'; ++c) {
 227                 switch (*c) {
 228                 case '#':
 229                         /* 'comment' stuff */
 230                         while (*c != 0 && *c != ',')
 231                                 ++c;
 232                         break;
 233                 case '*':
 234                         /* 'comment' character */
 235                         ++c;
 236                         break;
 237                 case ' ':
 238                 case '\t':
 239                 case '\n':
 240                 case '\r':
 241                         break;
 242                 default:
 243                         tflags = asm_constraint_flags[(int) *c];
 244                         if (tflags != 0) {
 245                                 flags |= tflags;
 246                         } else {
 247                                 flags |= isa_if->parse_asm_constraint(&c);
 248                         }
 249                         break;
 250                 }
 251         }
 252
 253         if ((
 254                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
 255                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
 256             ) || (
 257                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
 258                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
 259             )) {
 260                 flags |= ASM_CONSTRAINT_FLAG_INVALID;
 261         }
 262         if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ     |
 263                        ASM_CONSTRAINT_FLAG_MODIFIER_WRITE    |
 264                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
 265                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
 266             )) {
 267                 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
 268         }
 269
 270         return flags;
 271 }
 272
 273 int be_is_valid_clobber(const char *clobber)
 274 {
 275         /* memory is a valid clobber. (the frontend has to detect this case too,
 276          * because it has to add memory edges to the asm) */
 277         if (strcmp(clobber, "memory") == 0)
 278                 return 1;
 279         /* cc (condition code) is always valid */
 280         if (strcmp(clobber, "cc") == 0)
 281                 return 1;
 282
 283         return isa_if->is_valid_clobber(clobber);
 284 }
 285
 286 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 287 {
 288         if (isa_if == NULL)
 289                 isa_if = isa;
 290
 291         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 292 }
 293
 294 void be_opt_register(void)
 295 {
 296         lc_opt_entry_t *be_grp;
 297         static int run_once = 0;
 298
 299         if (run_once)
 300                 return;
 301         run_once = 1;
 302
 303         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 304         lc_opt_add_table(be_grp, be_main_options);
 305
 306         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 307                                &isa_ifs, (void**) &isa_if);
 308
 309         be_init_modules();
 310 }
 311
 312 /* Parse one argument. */
 313 int be_parse_arg(const char *arg)
 314 {
 315         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 316         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 317                 lc_opt_print_help_for_entry(be_grp, '-', stdout);
 318                 return -1;
 319         }
 320         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 321 }
 322
 323 /* Perform schedule verification if requested. */
 324 static void be_sched_verify(ir_graph *irg, int verify_opt)
 325 {
 326         if (verify_opt == BE_VERIFY_WARN) {
 327                 be_verify_schedule(irg);
 328         } else if (verify_opt == BE_VERIFY_ASSERT) {
 329                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 330         }
 331 }
 332
 333 /* Initialize the Firm backend. Must be run first in init_firm()! */
 334 void firm_be_init(void)
 335 {
 336         be_opt_register();
 337         be_init_modules();
 338 }
 339
 340 /* Finalize the Firm backend. */
 341 void firm_be_finish(void)
 342 {
 343         be_quit_modules();
 344 }
 345
 346 /* Returns the backend parameter */
 347 const backend_params *be_get_backend_param(void)
 348 {
 349         return isa_if->get_params();
 350 }
 351
 352 /**
 353  * Initializes the main environment for the backend.
 354  *
 355  * @param env          an empty environment
 356  * @param file_handle  the file handle where the output will be written to
 357  */
 358 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 359 {
 360         memset(env, 0, sizeof(*env));
 361         env->options              = &be_options;
 362         env->ent_trampoline_map   = pmap_create();
 363         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 364         env->ent_pic_symbol_map   = pmap_create();
 365         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 366
 367         remove_irp_type(env->pic_trampolines_type);
 368         remove_irp_type(env->pic_symbols_type);
 369         set_class_final(env->pic_trampolines_type, 1);
 370
 371         memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
 372         env->arch_env = arch_env_init(isa_if, file_handle, env);
 373
 374         be_dbg_open();
 375         return env;
 376 }
 377
 378 /**
 379  * Called when the be_main_env_t can be destroyed.
 380  */
 381 static void be_done_env(be_main_env_t *env)
 382 {
 383         arch_env_done(env->arch_env);
 384         be_dbg_close();
 385
 386         pmap_destroy(env->ent_trampoline_map);
 387         pmap_destroy(env->ent_pic_symbol_map);
 388         free_type(env->pic_trampolines_type);
 389         free_type(env->pic_symbols_type);
 390 }
 391
 392 /**
 393  * A wrapper around a firm dumper. Dumps only, if
 394  * flags are enabled.
 395  *
 396  * @param mask    a bitmask containing the reason what will be dumped
 397  * @param irg     the IR graph to dump
 398  * @param suffix  the suffix for the dumper
 399  * @param dumper  the dumper to be called
 400  */
 401 static void dump(int mask, ir_graph *irg, const char *suffix)
 402 {
 403         if (be_options.dump_flags & mask)
 404                 dump_ir_graph(irg, suffix);
 405 }
 406
 407 /**
 408  * Prepare a backend graph for code generation and initialize its irg
 409  */
 410 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 411 {
 412         /* don't duplicate locals in backend when dumping... */
 413         ir_remove_dump_flags(ir_dump_flag_consts_local);
 414
 415         dump(DUMP_INITIAL, irg, "begin");
 416
 417         irg->be_data = birg;
 418
 419         memset(birg, 0, sizeof(*birg));
 420         birg->irg = irg;
 421         birg->main_env = env;
 422         obstack_init(&birg->obst);
 423
 424         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 425         edges_activate_kind(irg, EDGE_KIND_DEP);
 426
 427         /* set the current graph (this is important for several firm functions) */
 428         current_ir_graph = irg;
 429
 430         /* we do this before critical edge split. As this produces less returns,
 431            because sometimes (= 164.gzip) multiple returns are slower */
 432         normalize_n_returns(irg);
 433
 434         /* Remove critical edges */
 435         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 436
 437         /* Ensure, that the ir_edges are computed. */
 438         edges_assure(irg);
 439
 440         set_irg_phase_state(irg, phase_backend);
 441         be_info_init_irg(irg);
 442
 443         dump(DUMP_INITIAL, irg, "prepared");
 444 }
 445
 446 int be_timing;
 447
 448 static const char *get_timer_name(be_timer_id_t id)
 449 {
 450         switch (id) {
 451         case T_ABI:            return "abi";
 452         case T_CODEGEN:        return "codegen";
 453         case T_RA_PREPARATION: return "ra_preparation";
 454         case T_SCHED:          return "sched";
 455         case T_CONSTR:         return "constr";
 456         case T_FINISH:         return "finish";
 457         case T_EMIT:           return "emit";
 458         case T_VERIFY:         return "verify";
 459         case T_OTHER:          return "other";
 460         case T_HEIGHTS:        return "heights";
 461         case T_LIVE:           return "live";
 462         case T_EXECFREQ:       return "execfreq";
 463         case T_SSA_CONSTR:     return "ssa_constr";
 464         case T_RA_PROLOG:      return "ra_prolog";
 465         case T_RA_EPILOG:      return "ra_epilog";
 466         case T_RA_CONSTR:      return "ra_constr";
 467         case T_RA_SPILL:       return "ra_spill";
 468         case T_RA_SPILL_APPLY: return "ra_spill_apply";
 469         case T_RA_COLOR:       return "ra_color";
 470         case T_RA_IFG:         return "ra_ifg";
 471         case T_RA_COPYMIN:     return "ra_copymin";
 472         case T_RA_SSA:         return "ra_ssa";
 473         case T_RA_OTHER:       return "ra_other";
 474         }
 475         return "unknown";
 476 }
 477 ir_timer_t *be_timers[T_LAST+1];
 478
 479 /**
 480  * The Firm backend main loop.
 481  * Do architecture specific lowering for all graphs
 482  * and call the architecture specific code generator.
 483  *
 484  * @param file_handle   the file handle the output will be written to
 485  * @param cup_name      name of the compilation unit
 486  */
 487 static void be_main_loop(FILE *file_handle, const char *cup_name)
 488 {
 489         static const char suffix[] = ".prof";
 490
 491         int           i, num_birgs, stat_active = 0;
 492         be_main_env_t env;
 493         char          prof_filename[256];
 494         be_irg_t      *birgs;
 495         ir_graph      **irg_list, **backend_irg_list;
 496         arch_env_t    *arch_env;
 497
 498         be_timing = (be_options.timing == BE_TIME_ON);
 499
 500         if (be_timing) {
 501                 for (i = 0; i < T_LAST+1; ++i) {
 502                         be_timers[i] = ir_timer_new();
 503                 }
 504         }
 505
 506         be_init_env(&env, file_handle);
 507         env.cup_name = cup_name;
 508
 509         be_dbg_so(cup_name);
 510         be_dbg_types();
 511
 512         arch_env = env.arch_env;
 513
 514         /* backend may provide an ordered list of irgs where code should be
 515          * generated for */
 516         irg_list         = NEW_ARR_F(ir_graph *, 0);
 517         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 518
 519         /* we might need 1 birg more for instrumentation constructor */
 520         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 521         birgs     = ALLOCAN(be_irg_t, num_birgs + 1);
 522
 523         be_info_init();
 524
 525         /* First: initialize all birgs */
 526         for (i = 0; i < num_birgs; ++i) {
 527                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 528                 initialize_birg(&birgs[i], irg, &env);
 529         }
 530         arch_env_handle_intrinsics(arch_env);
 531         DEL_ARR_F(irg_list);
 532
 533         /*
 534                 Get the filename for the profiling data.
 535                 Beware: '\0' is already included in sizeof(suffix)
 536         */
 537         memset(prof_filename, 0, sizeof(prof_filename));
 538         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 539         strcat(prof_filename, suffix);
 540
 541         /*
 542                 Next: Either instruments all irgs with profiling code
 543                 or try to read in profile data for current translation unit.
 544         */
 545         if (be_options.opt_profile) {
 546                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 547                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 548                 num_birgs++;
 549         } else {
 550                 ir_profile_read(prof_filename);
 551         }
 552
 553 #ifdef FIRM_STATISTICS
 554         stat_active = stat_is_active();
 555 #endif /* FIRM_STATISTICS */
 556
 557         /* For all graphs */
 558         for (i = 0; i < num_birgs; ++i) {
 559                 be_irg_t *birg = &birgs[i];
 560                 ir_graph *irg  = birg->irg;
 561                 optimization_state_t state;
 562
 563                 /* set the current graph (this is important for several firm functions) */
 564                 current_ir_graph = irg;
 565
 566                 stat_ev_if {
 567                         stat_ev_ctx_push_fobj("bemain_irg", irg);
 568                         be_stat_ev("bemain_insns_start", be_count_insns(irg));
 569                         be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
 570                 }
 571
 572                 /* stop and reset timers */
 573                 be_timer_push(T_OTHER);
 574
 575                 /* Verify the initial graph */
 576                 be_timer_push(T_VERIFY);
 577                 if (be_options.verify_option == BE_VERIFY_WARN) {
 578                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 579                         be_check_dominance(irg);
 580                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 581                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 582                         assert(be_check_dominance(irg) && "Dominance verification failed");
 583                 }
 584                 be_timer_pop(T_VERIFY);
 585
 586                 /* get a code generator for this graph. */
 587                 arch_env->impl->init_graph(irg);
 588
 589                 /* some transformations need to be done before abi introduce */
 590                 if (arch_env->impl->before_abi != NULL)
 591                         arch_env->impl->before_abi(irg);
 592
 593                 /* implement the ABI conventions. */
 594                 be_timer_push(T_ABI);
 595                 be_abi_introduce(irg);
 596                 be_timer_pop(T_ABI);
 597
 598                 if (!arch_env->custom_abi) {
 599                         dump(DUMP_ABI, irg, "abi");
 600                 }
 601
 602                 /* we have to do cfopt+remove_critical_edges as we can't have Bad-blocks
 603                  * or critical edges in the backend */
 604                 optimize_cf(irg);
 605                 remove_critical_cf_edges(irg);
 606
 607                 /* We often have dead code reachable through out-edges here. So for
 608                  * now we rebuild edges (as we need correct user count for code
 609                  * selection) */
 610                 edges_deactivate(irg);
 611                 edges_activate(irg);
 612
 613                 dump(DUMP_PREPARED, irg, "before-code-selection");
 614
 615                 if (be_options.verify_option == BE_VERIFY_WARN) {
 616                         be_check_dominance(irg);
 617                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 618                         assert(be_check_dominance(irg) && "Dominance verification failed");
 619                 }
 620
 621                 /* perform codeselection */
 622                 be_timer_push(T_CODEGEN);
 623                 if (arch_env->impl->prepare_graph != NULL)
 624                         arch_env->impl->prepare_graph(irg);
 625                 be_timer_pop(T_CODEGEN);
 626
 627                 if (be_options.verify_option == BE_VERIFY_WARN) {
 628                         be_check_dominance(irg);
 629                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 630                         assert(be_check_dominance(irg) && "Dominance verification failed");
 631                 }
 632
 633                 be_timer_push(T_EXECFREQ);
 634                 /**
 635                  * Create execution frequencies from profile data or estimate some
 636                  */
 637                 if (ir_profile_has_data())
 638                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 639                 else {
 640                         /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
 641                          * optimize graph phase merges blocks in the x86 backend */
 642                         edges_deactivate(irg);
 643                         birg->exec_freq = compute_execfreq(irg, 10);
 644                 }
 645                 be_timer_pop(T_EXECFREQ);
 646
 647
 648                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 649                 /* be_live_chk_compare(irg); */
 650
 651                 /* schedule the irg */
 652                 be_timer_push(T_SCHED);
 653                 list_sched(irg);
 654                 be_timer_pop(T_SCHED);
 655
 656                 dump(DUMP_SCHED, irg, "sched");
 657
 658                 /* check schedule */
 659                 be_timer_push(T_VERIFY);
 660                 be_sched_verify(irg, be_options.verify_option);
 661                 be_timer_pop(T_VERIFY);
 662
 663                 /* introduce patterns to assure constraints */
 664                 be_timer_push(T_CONSTR);
 665                 /* we switch off optimizations here, because they might cause trouble */
 666                 save_optimization_state(&state);
 667                 set_optimize(0);
 668                 set_opt_cse(0);
 669
 670                 /* add Keeps for should_be_different constrained nodes  */
 671                 /* beware: needs schedule due to usage of be_ssa_constr */
 672                 assure_constraints(irg);
 673                 be_timer_pop(T_CONSTR);
 674
 675                 dump(DUMP_SCHED, irg, "assured");
 676
 677                 /* stuff needs to be done after scheduling but before register allocation */
 678                 be_timer_push(T_RA_PREPARATION);
 679                 if (arch_env->impl->before_ra != NULL)
 680                         arch_env->impl->before_ra(irg);
 681                 be_timer_pop(T_RA_PREPARATION);
 682
 683                 /* connect all stack modifying nodes together (see beabi.c) */
 684                 be_timer_push(T_ABI);
 685                 be_abi_fix_stack_nodes(irg);
 686                 be_timer_pop(T_ABI);
 687
 688                 dump(DUMP_SCHED, irg, "fix_stack");
 689
 690                 /* check schedule */
 691                 be_timer_push(T_VERIFY);
 692                 be_sched_verify(irg, be_options.verify_option);
 693                 be_timer_pop(T_VERIFY);
 694
 695                 stat_ev_if {
 696                         stat_ev_dbl("bemain_costs_before_ra",
 697                                         be_estimate_irg_costs(irg, birg->exec_freq));
 698                         be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
 699                         be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
 700                 }
 701
 702                 /* Do register allocation */
 703                 be_allocate_registers(irg);
 704
 705 #ifdef FIRM_STATISTICS
 706                 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
 707 #endif
 708
 709                 dump(DUMP_RA, irg, "ra");
 710
 711                 /* let the code generator prepare the graph for emitter */
 712                 be_timer_push(T_FINISH);
 713                 if (arch_env->impl->after_ra != NULL)
 714                         arch_env->impl->after_ra(irg);
 715                 be_timer_pop(T_FINISH);
 716
 717                 /* fix stack offsets */
 718                 be_timer_push(T_ABI);
 719                 be_abi_fix_stack_nodes(irg);
 720                 be_remove_dead_nodes_from_schedule(irg);
 721                 be_abi_fix_stack_bias(irg);
 722                 be_timer_pop(T_ABI);
 723
 724                 dump(DUMP_SCHED, irg, "fix_stack_after_ra");
 725
 726                 be_timer_push(T_FINISH);
 727                 if (arch_env->impl->finish != NULL)
 728                         arch_env->impl->finish(irg);
 729                 be_timer_pop(T_FINISH);
 730
 731                 dump(DUMP_FINAL, irg, "finish");
 732
 733                 stat_ev_if {
 734                         be_stat_ev("bemain_insns_finish", be_count_insns(irg));
 735                         be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
 736                 }
 737
 738                 /* check schedule and register allocation */
 739                 be_timer_push(T_VERIFY);
 740                 if (be_options.verify_option == BE_VERIFY_WARN) {
 741                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 742                         be_check_dominance(irg);
 743                         be_verify_schedule(irg);
 744                         be_verify_register_allocation(irg);
 745                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 746                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 747                         assert(be_check_dominance(irg) && "Dominance verification failed");
 748                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 749                         assert(be_verify_register_allocation(irg)
 750                                && "register allocation verification failed");
 751
 752                 }
 753                 be_timer_pop(T_VERIFY);
 754
 755                 /* emit assembler code */
 756                 be_timer_push(T_EMIT);
 757                 if (arch_env->impl->emit != NULL)
 758                         arch_env->impl->emit(irg);
 759                 be_timer_pop(T_EMIT);
 760
 761                 dump(DUMP_FINAL, irg, "end");
 762
 763                 be_timer_push(T_ABI);
 764                 be_abi_free(irg);
 765                 be_timer_pop(T_ABI);
 766
 767                 restore_optimization_state(&state);
 768
 769                 be_timer_pop(T_OTHER);
 770
 771                 if (be_timing) {
 772                         int t;
 773                         if (stat_ev_enabled) {
 774                                 for (t = 0; t < T_LAST+1; ++t) {
 775                                         char buf[128];
 776                                         snprintf(buf, sizeof(buf), "bemain_time_%s",
 777                                                  get_timer_name(t));
 778                                         stat_ev_dbl(buf, ir_timer_elapsed_usec(be_timers[i]));
 779                                 }
 780                         } else {
 781                                 printf("==>> IRG %s <<==\n",
 782                                        get_entity_name(get_irg_entity(irg)));
 783                                 for (t = 0; t < T_LAST+1; ++t) {
 784                                         double val = ir_timer_elapsed_usec(be_timers[t]) / 1000.0;
 785                                         printf("%-20s: %8.3lf msec\n", get_timer_name(t), val);
 786                                 }
 787                         }
 788                         for (t = 0; t < T_LAST+1; ++t) {
 789                                 ir_timer_stop(be_timers[t]);
 790                                 ir_timer_reset(be_timers[t]);
 791                         }
 792                 }
 793
 794                 be_free_birg(irg);
 795                 stat_ev_ctx_pop("bemain_irg");
 796         }
 797         ir_profile_free();
 798         be_done_env(&env);
 799
 800         be_info_free();
 801 }
 802
 803 /* Main interface to the frontend. */
 804 void be_main(FILE *file_handle, const char *cup_name)
 805 {
 806         ir_timer_t *t = NULL;
 807
 808         /* The user specified another config file to read. do that now. */
 809         if (config_file[0] != '\0') {
 810                 FILE *f = fopen(config_file, "rt");
 811
 812                 if (f != NULL) {
 813                         lc_opt_from_file(config_file, f, NULL);
 814                         fclose(f);
 815                 } else {
 816                         fprintf(stderr, "Warning: Cannot open config file '%s'\n", config_file);
 817                 }
 818         }
 819
 820         if (be_options.timing == BE_TIME_ON) {
 821                 t = ir_timer_new();
 822
 823                 if (ir_timer_enter_high_priority()) {
 824                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 825                 }
 826
 827                 ir_timer_reset_and_start(t);
 828         }
 829
 830 #ifdef FIRM_STATISTICS
 831         if (be_options.statev) {
 832                 const char *dot = strrchr(cup_name, '.');
 833                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 834                 char       *buf = ALLOCAN(char, pos - cup_name + 1);
 835                 strncpy(buf, cup_name, pos - cup_name);
 836                 buf[pos - cup_name] = '\0';
 837
 838                 be_options.statev = 1;
 839                 stat_ev_begin(buf, be_options.filtev);
 840                 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
 841         }
 842 #endif
 843
 844         be_main_loop(file_handle, cup_name);
 845
 846         if (be_options.timing == BE_TIME_ON) {
 847                 ir_timer_stop(t);
 848                 ir_timer_leave_high_priority();
 849                 stat_ev_if {
 850                         stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
 851                 } else {
 852                         double val = ir_timer_elapsed_usec(t) / 1000.0;
 853                         printf("%-20s: %8.3lf msec\n", "BEMAINLOOP", val);
 854                 }
 855         }
 856
 857 #ifdef FIRM_STATISTICS
 858         if (be_options.statev) {
 859                 stat_ev_ctx_pop("bemain_compilation_unit");
 860                 stat_ev_end();
 861         }
 862 #endif
 863 }
 864
 865 static int do_lower_for_target(ir_prog *irp, void *context)
 866 {
 867         const backend_params *be_params = be_get_backend_param();
 868         be_params->lower_for_target();
 869         (void) context;
 870         (void) irp;
 871         return 0;
 872 }
 873
 874 ir_prog_pass_t *lower_for_target_pass(const char *name)
 875 {
 876         ir_prog_pass_t *pass = XMALLOCZ(ir_prog_pass_t);
 877         return def_prog_pass_constructor(pass,
 878                                          name ? name : "lower_for_target",
 879                                          do_lower_for_target);
 880 }
 881
 882 unsigned be_put_ignore_regs(const ir_graph *irg,
 883                             const arch_register_class_t *cls, bitset_t *bs)
 884 {
 885         if (bs == NULL)
 886                 bs = bitset_alloca(cls->n_regs);
 887         else
 888                 bitset_clear_all(bs);
 889
 890         assert(bitset_size(bs) == cls->n_regs);
 891         arch_put_non_ignore_regs(cls, bs);
 892         bitset_flip_all(bs);
 893         be_abi_put_ignore_regs(be_get_irg_abi(irg), cls, bs);
 894
 895         return bitset_popcount(bs);
 896 }