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

   1 /*
   2  * This file is part of libFirm.
   3  * Copyright (C) 2012 University of Karlsruhe.
   4  */
   5
   6 /**
   7  * @file
   8  * @brief       Main Backend driver.
   9  * @author      Sebastian Hack
  10  * @date        25.11.2004
  11  */
  12 #include "config.h"
  13
  14 #include <stdarg.h>
  15 #include <stdio.h>
  16
  17 #include "lc_opts.h"
  18 #include "lc_opts_enum.h"
  19
  20 #include "obst.h"
  21 #include "bitset.h"
  22 #include "statev.h"
  23 #include "irprog.h"
  24 #include "irgopt.h"
  25 #include "irgraph.h"
  26 #include "irdump.h"
  27 #include "irdom_t.h"
  28 #include "iredges_t.h"
  29 #include "irloop_t.h"
  30 #include "irtools.h"
  31 #include "irverify.h"
  32 #include "irprintf.h"
  33 #include "iroptimize.h"
  34 #include "firmstat.h"
  35 #include "execfreq_t.h"
  36 #include "irprofile.h"
  37 #include "irpass_t.h"
  38 #include "ircons.h"
  39
  40 #include "bearch.h"
  41 #include "be_t.h"
  42 #include "begnuas.h"
  43 #include "bemodule.h"
  44 #include "beutil.h"
  45 #include "benode.h"
  46 #include "beirgmod.h"
  47 #include "besched.h"
  48 #include "belistsched.h"
  49 #include "belive_t.h"
  50 #include "bera.h"
  51 #include "bechordal_t.h"
  52 #include "beifg.h"
  53 #include "becopyopt.h"
  54 #include "becopystat.h"
  55 #include "bessadestr.h"
  56 #include "beabi.h"
  57 #include "belower.h"
  58 #include "bestat.h"
  59 #include "beverify.h"
  60 #include "beirg.h"
  61 #include "bestack.h"
  62 #include "beemitter.h"
  63
  64 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
  65
  66 /* options visible for anyone */
  67 be_options_t be_options = {
  68         DUMP_NONE,                         /* dump flags */
  69         BE_TIME_OFF,                       /* no timing */
  70         false,                             /* profile_generate */
  71         false,                             /* profile_use */
  72         0,                                 /* try to omit frame pointer */
  73         0,                                 /* create PIC code */
  74         BE_VERIFY_WARN,                    /* verification level: warn */
  75         "",                                /* ilp server */
  76         "",                                /* ilp solver */
  77         0,                                 /* enable statistic event dumping */
  78         "",                                /* print stat events */
  79         1,                                 /* verbose assembler output */
  80 };
  81
  82 /* back end instruction set architecture to use */
  83 static const arch_isa_if_t *isa_if = NULL;
  84
  85 /* possible dumping options */
  86 static const lc_opt_enum_mask_items_t dump_items[] = {
  87         { "none",       DUMP_NONE },
  88         { "initial",    DUMP_INITIAL },
  89         { "abi",        DUMP_ABI    },
  90         { "sched",      DUMP_SCHED  },
  91         { "prepared",   DUMP_PREPARED },
  92         { "regalloc",   DUMP_RA },
  93         { "final",      DUMP_FINAL },
  94         { "be",         DUMP_BE },
  95         { "all",        2 * DUMP_BE - 1 },
  96         { NULL,         0 }
  97 };
  98
  99 /* verify options. */
 100 static const lc_opt_enum_int_items_t verify_items[] = {
 101         { "off",    BE_VERIFY_OFF    },
 102         { "warn",   BE_VERIFY_WARN   },
 103         { "assert", BE_VERIFY_ASSERT },
 104         { NULL,     0 }
 105 };
 106
 107 static lc_opt_enum_mask_var_t dump_var = {
 108         &be_options.dump_flags, dump_items
 109 };
 110
 111 static lc_opt_enum_int_var_t verify_var = {
 112         &be_options.verify_option, verify_items
 113 };
 114
 115 static const lc_opt_table_entry_t be_main_options[] = {
 116         LC_OPT_ENT_ENUM_MASK("dump",       "dump irg on several occasions",                       &dump_var),
 117         LC_OPT_ENT_BOOL     ("omitfp",     "omit frame pointer",                                  &be_options.omit_fp),
 118         LC_OPT_ENT_BOOL     ("pic",        "create PIC code",                                     &be_options.pic),
 119         LC_OPT_ENT_ENUM_INT ("verify",     "verify the backend irg",                              &verify_var),
 120         LC_OPT_ENT_BOOL     ("time",       "get backend timing statistics",                       &be_options.timing),
 121         LC_OPT_ENT_BOOL     ("profilegenerate", "instrument the code for execution count profiling",   &be_options.opt_profile_generate),
 122         LC_OPT_ENT_BOOL     ("profileuse",      "use existing profile data",                           &be_options.opt_profile_use),
 123         LC_OPT_ENT_BOOL     ("statev",     "dump statistic events",                               &be_options.statev),
 124         LC_OPT_ENT_STR      ("filtev",     "filter for stat events (regex if support is active",  &be_options.filtev),
 125         LC_OPT_ENT_BOOL     ("verboseasm", "enable verbose assembler output",                     &be_options.verbose_asm),
 126
 127         LC_OPT_ENT_STR("ilp.server", "the ilp server name", &be_options.ilp_server),
 128         LC_OPT_ENT_STR("ilp.solver", "the ilp solver name", &be_options.ilp_solver),
 129         LC_OPT_LAST
 130 };
 131
 132 static be_module_list_entry_t *isa_ifs         = NULL;
 133 static bool                    isa_initialized = false;
 134
 135 asm_constraint_flags_t asm_constraint_flags[256];
 136
 137 static void initialize_isa(void)
 138 {
 139         if (isa_initialized)
 140                 return;
 141         isa_if->init();
 142         isa_initialized = true;
 143 }
 144
 145 static void finish_isa(void)
 146 {
 147         if (isa_initialized) {
 148                 isa_if->finish();
 149                 isa_initialized = false;
 150         }
 151 }
 152
 153 void be_init_default_asm_constraint_flags(void)
 154 {
 155         asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 156         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 157         asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 158                 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
 159         asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 160                 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
 161         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 162
 163         asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
 164                 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
 165         asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
 166                 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
 167
 168         asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 169         asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 170         asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 171         asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 172         asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 173         asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 174         asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 175         asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 176         asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 177         asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 178         asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 179         asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 180         asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 181         asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 182
 183         asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 184         asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 185         asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 186         asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 187         asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 188
 189         asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 190         asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 191         asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 192         asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 193         asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 194         asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 195         asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 196         asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 197         asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 198         asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 199         asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 200
 201         asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
 202                 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
 203                 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 204
 205         /* these should have been catched by the parsing code already */
 206         asm_constraint_flags['#']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 207         asm_constraint_flags['*']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 208         asm_constraint_flags[' ']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 209         asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 210         asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 211         asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 212 }
 213
 214 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
 215 {
 216         asm_constraint_flags_t  flags = ASM_CONSTRAINT_FLAG_NONE;
 217         const char             *c;
 218         asm_constraint_flags_t  tflags;
 219
 220         initialize_isa();
 221
 222         for (c = constraint; *c != '\0'; ++c) {
 223                 switch (*c) {
 224                 case '#':
 225                         /* 'comment' stuff */
 226                         while (*c != 0 && *c != ',')
 227                                 ++c;
 228                         break;
 229                 case '*':
 230                         /* 'comment' character */
 231                         ++c;
 232                         break;
 233                 case ' ':
 234                 case '\t':
 235                 case '\n':
 236                 case '\r':
 237                         break;
 238                 default:
 239                         tflags = asm_constraint_flags[(int) *c];
 240                         if (tflags != 0) {
 241                                 flags |= tflags;
 242                         } else {
 243                                 flags |= isa_if->parse_asm_constraint(&c);
 244                         }
 245                         break;
 246                 }
 247         }
 248
 249         if ((
 250                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
 251                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
 252             ) || (
 253                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
 254                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
 255             )) {
 256                 flags |= ASM_CONSTRAINT_FLAG_INVALID;
 257         }
 258         if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ     |
 259                        ASM_CONSTRAINT_FLAG_MODIFIER_WRITE    |
 260                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
 261                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
 262             )) {
 263                 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
 264         }
 265
 266         return flags;
 267 }
 268
 269 int be_is_valid_clobber(const char *clobber)
 270 {
 271         initialize_isa();
 272
 273         /* memory is a valid clobber. (the frontend has to detect this case too,
 274          * because it has to add memory edges to the asm) */
 275         if (strcmp(clobber, "memory") == 0)
 276                 return 1;
 277         /* cc (condition code) is always valid */
 278         if (strcmp(clobber, "cc") == 0)
 279                 return 1;
 280
 281         return isa_if->is_valid_clobber(clobber);
 282 }
 283
 284 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 285 {
 286         if (isa_if == NULL)
 287                 isa_if = isa;
 288
 289         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 290 }
 291
 292 static void be_opt_register(void)
 293 {
 294         lc_opt_entry_t *be_grp;
 295         static int run_once = 0;
 296
 297         if (run_once)
 298                 return;
 299         run_once = 1;
 300
 301         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 302         lc_opt_add_table(be_grp, be_main_options);
 303
 304         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 305                                &isa_ifs, (void**) &isa_if);
 306
 307         be_init_modules();
 308 }
 309
 310 /* Parse one argument. */
 311 int be_parse_arg(const char *arg)
 312 {
 313         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 314         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 315                 lc_opt_print_help_for_entry(be_grp, '-', stdout);
 316                 return -1;
 317         }
 318         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 319 }
 320
 321 /* Perform schedule verification if requested. */
 322 static void be_sched_verify(ir_graph *irg, int verify_opt)
 323 {
 324         if (verify_opt == BE_VERIFY_WARN) {
 325                 be_verify_schedule(irg);
 326         } else if (verify_opt == BE_VERIFY_ASSERT) {
 327                 assert(be_verify_schedule(irg) && "Schedule verification failed.");
 328         }
 329 }
 330
 331 /* Initialize the Firm backend. Must be run first in init_firm()! */
 332 void firm_be_init(void)
 333 {
 334         be_opt_register();
 335         be_init_modules();
 336 }
 337
 338 /* Finalize the Firm backend. */
 339 void firm_be_finish(void)
 340 {
 341         finish_isa();
 342         be_quit_modules();
 343 }
 344
 345 /* Returns the backend parameter */
 346 const backend_params *be_get_backend_param(void)
 347 {
 348         initialize_isa();
 349         return isa_if->get_params();
 350 }
 351
 352 int be_is_big_endian(void)
 353 {
 354         return be_get_backend_param()->byte_order_big_endian;
 355 }
 356
 357 unsigned be_get_machine_size(void)
 358 {
 359         return be_get_backend_param()->machine_size;
 360 }
 361
 362 ir_mode *be_get_mode_float_arithmetic(void)
 363 {
 364         return be_get_backend_param()->mode_float_arithmetic;
 365 }
 366
 367 ir_type *be_get_type_long_long(void)
 368 {
 369         return be_get_backend_param()->type_long_long;
 370 }
 371
 372 ir_type *be_get_type_unsigned_long_long(void)
 373 {
 374         return be_get_backend_param()->type_unsigned_long_long;
 375 }
 376
 377 ir_type *be_get_type_long_double(void)
 378 {
 379         return be_get_backend_param()->type_long_double;
 380 }
 381
 382 /**
 383  * Initializes the main environment for the backend.
 384  *
 385  * @param env          an empty environment
 386  * @param file_handle  the file handle where the output will be written to
 387  */
 388 static be_main_env_t *be_init_env(be_main_env_t *const env, char const *const compilation_unit_name)
 389 {
 390         memset(env, 0, sizeof(*env));
 391         env->ent_trampoline_map   = pmap_create();
 392         env->pic_trampolines_type = new_type_segment(NEW_ID("$PIC_TRAMPOLINE_TYPE"), tf_none);
 393         env->ent_pic_symbol_map   = pmap_create();
 394         env->pic_symbols_type     = new_type_segment(NEW_ID("$PIC_SYMBOLS_TYPE"), tf_none);
 395         env->cup_name             = compilation_unit_name;
 396         env->arch_env             = isa_if->begin_codegeneration();
 397
 398         set_class_final(env->pic_trampolines_type, 1);
 399
 400         memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
 401
 402         return env;
 403 }
 404
 405 /**
 406  * Called when the be_main_env_t can be destroyed.
 407  */
 408 static void be_done_env(be_main_env_t *env)
 409 {
 410         pmap_destroy(env->ent_trampoline_map);
 411         pmap_destroy(env->ent_pic_symbol_map);
 412         free_type(env->pic_trampolines_type);
 413         free_type(env->pic_symbols_type);
 414 }
 415
 416 /**
 417  * A wrapper around a firm dumper. Dumps only, if
 418  * flags are enabled.
 419  *
 420  * @param mask    a bitmask containing the reason what will be dumped
 421  * @param irg     the IR graph to dump
 422  * @param suffix  the suffix for the dumper
 423  * @param dumper  the dumper to be called
 424  */
 425 static void dump(int mask, ir_graph *irg, const char *suffix)
 426 {
 427         if (be_options.dump_flags & mask)
 428                 dump_ir_graph(irg, suffix);
 429 }
 430
 431 /**
 432  * Prepare a backend graph for code generation and initialize its irg
 433  */
 434 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 435 {
 436         /* don't duplicate locals in backend when dumping... */
 437         ir_remove_dump_flags(ir_dump_flag_consts_local);
 438
 439         dump(DUMP_INITIAL, irg, "begin");
 440
 441         irg->be_data = birg;
 442
 443         memset(birg, 0, sizeof(*birg));
 444         birg->main_env = env;
 445         obstack_init(&birg->obst);
 446         birg->lv = be_liveness_new(irg);
 447
 448         edges_deactivate(irg);
 449         edges_activate(irg);
 450
 451         /* set the current graph (this is important for several firm functions) */
 452         current_ir_graph = irg;
 453
 454         /* we do this before critical edge split. As this produces less returns,
 455            because sometimes (= 164.gzip) multiple returns are slower */
 456         normalize_n_returns(irg);
 457
 458         /* Remove critical edges */
 459         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 460
 461         /* For code generation all unreachable code and Bad nodes should be gone */
 462         remove_unreachable_code(irg);
 463         remove_bads(irg);
 464
 465         /* Ensure, that the ir_edges are computed. */
 466         assure_edges(irg);
 467
 468         be_info_init_irg(irg);
 469
 470         dump(DUMP_INITIAL, irg, "prepared");
 471 }
 472
 473 int be_timing;
 474
 475 static const char *get_timer_name(be_timer_id_t id)
 476 {
 477         switch (id) {
 478         case T_ABI:            return "abi";
 479         case T_CODEGEN:        return "codegen";
 480         case T_RA_PREPARATION: return "ra_preparation";
 481         case T_SCHED:          return "sched";
 482         case T_CONSTR:         return "constr";
 483         case T_FINISH:         return "finish";
 484         case T_EMIT:           return "emit";
 485         case T_VERIFY:         return "verify";
 486         case T_OTHER:          return "other";
 487         case T_HEIGHTS:        return "heights";
 488         case T_LIVE:           return "live";
 489         case T_EXECFREQ:       return "execfreq";
 490         case T_SSA_CONSTR:     return "ssa_constr";
 491         case T_RA_EPILOG:      return "ra_epilog";
 492         case T_RA_CONSTR:      return "ra_constr";
 493         case T_RA_SPILL:       return "ra_spill";
 494         case T_RA_SPILL_APPLY: return "ra_spill_apply";
 495         case T_RA_COLOR:       return "ra_color";
 496         case T_RA_IFG:         return "ra_ifg";
 497         case T_RA_COPYMIN:     return "ra_copymin";
 498         case T_RA_SSA:         return "ra_ssa";
 499         case T_RA_OTHER:       return "ra_other";
 500         }
 501         return "unknown";
 502 }
 503 ir_timer_t *be_timers[T_LAST+1];
 504
 505 void be_lower_for_target(void)
 506 {
 507         size_t i;
 508
 509         initialize_isa();
 510
 511         isa_if->lower_for_target();
 512         /* set the phase to low */
 513         for (i = get_irp_n_irgs(); i > 0;) {
 514                 ir_graph *irg = get_irp_irg(--i);
 515                 assert(!irg_is_constrained(irg, IR_GRAPH_CONSTRAINT_TARGET_LOWERED));
 516                 add_irg_constraints(irg, IR_GRAPH_CONSTRAINT_TARGET_LOWERED);
 517         }
 518 }
 519
 520 /**
 521  * The Firm backend main loop.
 522  * Do architecture specific lowering for all graphs
 523  * and call the architecture specific code generator.
 524  *
 525  * @param file_handle   the file handle the output will be written to
 526  * @param cup_name      name of the compilation unit
 527  */
 528 static void be_main_loop(FILE *file_handle, const char *cup_name)
 529 {
 530         static const char suffix[] = ".prof";
 531
 532         size_t        i;
 533         size_t        num_irgs;
 534         size_t        num_birgs;
 535         be_main_env_t env;
 536         char          prof_filename[256];
 537         be_irg_t      *birgs;
 538         arch_env_t    *arch_env;
 539
 540         be_timing = (be_options.timing == BE_TIME_ON);
 541
 542         /* perform target lowering if it didn't happen yet */
 543         if (get_irp_n_irgs() > 0 && !irg_is_constrained(get_irp_irg(0), IR_GRAPH_CONSTRAINT_TARGET_LOWERED))
 544                 be_lower_for_target();
 545
 546         if (be_timing) {
 547                 for (i = 0; i < T_LAST+1; ++i) {
 548                         be_timers[i] = ir_timer_new();
 549                 }
 550         }
 551
 552         be_init_env(&env, cup_name);
 553
 554         be_emit_init(file_handle);
 555         be_gas_begin_compilation_unit(&env);
 556
 557         arch_env = env.arch_env;
 558
 559         /* we might need 1 birg more for instrumentation constructor */
 560         num_irgs = get_irp_n_irgs();
 561         birgs    = ALLOCAN(be_irg_t, num_irgs + 1);
 562
 563         be_info_init();
 564
 565         /* First: initialize all birgs */
 566         num_birgs = 0;
 567         for (i = 0; i < num_irgs; ++i) {
 568                 ir_graph  *irg    = get_irp_irg(i);
 569                 ir_entity *entity = get_irg_entity(irg);
 570                 if (get_entity_linkage(entity) & IR_LINKAGE_NO_CODEGEN)
 571                         continue;
 572                 initialize_birg(&birgs[num_birgs++], irg, &env);
 573         }
 574         arch_env_handle_intrinsics(arch_env);
 575
 576         /*
 577                 Get the filename for the profiling data.
 578                 Beware: '\0' is already included in sizeof(suffix)
 579         */
 580         sprintf(prof_filename, "%.*s%s",
 581                 (int)(sizeof(prof_filename) - sizeof(suffix)), cup_name, suffix);
 582
 583         bool have_profile = false;
 584         if (be_options.opt_profile_use) {
 585                 bool res = ir_profile_read(prof_filename);
 586                 if (!res) {
 587                         fprintf(stderr, "Warning: Couldn't read profile data '%s'\n",
 588                                 prof_filename);
 589                 } else {
 590                         ir_create_execfreqs_from_profile();
 591                         ir_profile_free();
 592                         have_profile = true;
 593                 }
 594         }
 595
 596         if (num_birgs > 0 && be_options.opt_profile_generate) {
 597                 ir_graph *const prof_init_irg = ir_profile_instrument(prof_filename);
 598                 assert(prof_init_irg->be_data == NULL);
 599                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 600                 num_birgs++;
 601                 num_irgs++;
 602                 assert(num_irgs == get_irp_n_irgs());
 603         }
 604
 605         for (be_timer_id_t t = T_FIRST; t < T_LAST+1; ++t) {
 606                 ir_timer_init_parent(be_timers[t]);
 607         }
 608         if (!have_profile) {
 609                 be_timer_push(T_EXECFREQ);
 610                 for (i = 0; i < num_irgs; ++i) {
 611                         ir_graph *irg = get_irp_irg(i);
 612                         ir_estimate_execfreq(irg);
 613                 }
 614                 be_timer_pop(T_EXECFREQ);
 615         }
 616
 617         /* For all graphs */
 618         for (i = 0; i < num_irgs; ++i) {
 619                 ir_graph  *const irg    = get_irp_irg(i);
 620                 ir_entity *const entity = get_irg_entity(irg);
 621                 if (get_entity_linkage(entity) & IR_LINKAGE_NO_CODEGEN)
 622                         continue;
 623
 624                 /* set the current graph (this is important for several firm functions) */
 625                 current_ir_graph = irg;
 626
 627                 if (stat_ev_enabled) {
 628                         stat_ev_ctx_push_fmt("bemain_irg", "%+F", irg);
 629                         stat_ev_ull("bemain_insns_start", be_count_insns(irg));
 630                         stat_ev_ull("bemain_blocks_start", be_count_blocks(irg));
 631                 }
 632
 633                 /* stop and reset timers */
 634                 be_timer_push(T_OTHER);
 635
 636                 /* Verify the initial graph */
 637                 be_timer_push(T_VERIFY);
 638                 if (be_options.verify_option == BE_VERIFY_WARN) {
 639                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 640                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 641                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 642                 }
 643                 be_timer_pop(T_VERIFY);
 644
 645                 /* get a code generator for this graph. */
 646                 if (arch_env->impl->init_graph)
 647                         arch_env->impl->init_graph(irg);
 648
 649                 /* some transformations need to be done before abi introduce */
 650                 if (arch_env->impl->before_abi != NULL)
 651                         arch_env->impl->before_abi(irg);
 652
 653                 /* implement the ABI conventions. */
 654                 if (!arch_env->custom_abi) {
 655                         be_timer_push(T_ABI);
 656                         be_abi_introduce(irg);
 657                         be_timer_pop(T_ABI);
 658                         dump(DUMP_ABI, irg, "abi");
 659                 }
 660
 661                 /* We can't have Bad-blocks or critical edges in the backend.
 662                  * Before removing Bads, we remove unreachable code. */
 663                 optimize_graph_df(irg);
 664                 remove_critical_cf_edges(irg);
 665                 remove_bads(irg);
 666
 667                 /* We often have dead code reachable through out-edges here. So for
 668                  * now we rebuild edges (as we need correct user count for code
 669                  * selection) */
 670                 edges_deactivate(irg);
 671                 edges_activate(irg);
 672
 673                 dump(DUMP_PREPARED, irg, "before-code-selection");
 674
 675                 /* perform codeselection */
 676                 be_timer_push(T_CODEGEN);
 677                 if (arch_env->impl->prepare_graph != NULL)
 678                         arch_env->impl->prepare_graph(irg);
 679                 be_timer_pop(T_CODEGEN);
 680
 681                 dump(DUMP_PREPARED, irg, "code-selection");
 682
 683                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 684                 /* be_live_chk_compare(irg); */
 685
 686                 /* schedule the irg */
 687                 be_timer_push(T_SCHED);
 688                 be_schedule_graph(irg);
 689                 be_timer_pop(T_SCHED);
 690
 691                 dump(DUMP_SCHED, irg, "sched");
 692
 693                 /* check schedule */
 694                 be_timer_push(T_VERIFY);
 695                 be_sched_verify(irg, be_options.verify_option);
 696                 be_timer_pop(T_VERIFY);
 697
 698                 /* introduce patterns to assure constraints */
 699                 be_timer_push(T_CONSTR);
 700                 /* we switch off optimizations here, because they might cause trouble */
 701                 optimization_state_t state;
 702                 save_optimization_state(&state);
 703                 set_optimize(0);
 704                 set_opt_cse(0);
 705
 706                 /* add Keeps for should_be_different constrained nodes  */
 707                 /* beware: needs schedule due to usage of be_ssa_constr */
 708                 assure_constraints(irg);
 709                 be_timer_pop(T_CONSTR);
 710
 711                 dump(DUMP_SCHED, irg, "assured");
 712
 713                 /* stuff needs to be done after scheduling but before register allocation */
 714                 be_timer_push(T_RA_PREPARATION);
 715                 if (arch_env->impl->before_ra != NULL)
 716                         arch_env->impl->before_ra(irg);
 717                 be_timer_pop(T_RA_PREPARATION);
 718
 719                 /* connect all stack modifying nodes together (see beabi.c) */
 720                 be_timer_push(T_ABI);
 721                 be_abi_fix_stack_nodes(irg);
 722                 be_timer_pop(T_ABI);
 723
 724                 dump(DUMP_SCHED, irg, "fix_stack");
 725
 726                 /* check schedule */
 727                 be_timer_push(T_VERIFY);
 728                 be_sched_verify(irg, be_options.verify_option);
 729                 be_timer_pop(T_VERIFY);
 730
 731                 if (stat_ev_enabled) {
 732                         stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg));
 733                         stat_ev_ull("bemain_insns_before_ra", be_count_insns(irg));
 734                         stat_ev_ull("bemain_blocks_before_ra", be_count_blocks(irg));
 735                 }
 736
 737                 /* Do register allocation */
 738                 be_allocate_registers(irg);
 739
 740                 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg));
 741
 742                 dump(DUMP_RA, irg, "ra");
 743
 744                 be_timer_push(T_FINISH);
 745                 if (arch_env->impl->finish_graph != NULL)
 746                         arch_env->impl->finish_graph(irg);
 747                 be_timer_pop(T_FINISH);
 748
 749                 dump(DUMP_FINAL, irg, "finish");
 750
 751                 if (stat_ev_enabled) {
 752                         stat_ev_ull("bemain_insns_finish", be_count_insns(irg));
 753                         stat_ev_ull("bemain_blocks_finish", be_count_blocks(irg));
 754                 }
 755
 756                 /* check schedule and register allocation */
 757                 be_timer_push(T_VERIFY);
 758                 if (be_options.verify_option == BE_VERIFY_WARN) {
 759                         irg_verify(irg, VERIFY_ENFORCE_SSA);
 760                         be_verify_schedule(irg);
 761                         be_verify_register_allocation(irg);
 762                 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
 763                         assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
 764                         assert(be_verify_schedule(irg) && "Schedule verification failed");
 765                         assert(be_verify_register_allocation(irg)
 766                                && "register allocation verification failed");
 767
 768                 }
 769                 be_timer_pop(T_VERIFY);
 770
 771                 /* emit assembler code */
 772                 be_timer_push(T_EMIT);
 773                 if (arch_env->impl->emit != NULL)
 774                         arch_env->impl->emit(irg);
 775                 be_timer_pop(T_EMIT);
 776
 777                 dump(DUMP_FINAL, irg, "end");
 778
 779                 restore_optimization_state(&state);
 780
 781                 be_timer_pop(T_OTHER);
 782
 783                 if (be_timing) {
 784                         be_timer_id_t t;
 785                         if (stat_ev_enabled) {
 786                                 for (t = T_FIRST; t < T_LAST+1; ++t) {
 787                                         char buf[128];
 788                                         snprintf(buf, sizeof(buf), "bemain_time_%s",
 789                                                  get_timer_name(t));
 790                                         stat_ev_dbl(buf, ir_timer_elapsed_usec(be_timers[i]));
 791                                 }
 792                         } else {
 793                                 printf("==>> IRG %s <<==\n",
 794                                        get_entity_name(get_irg_entity(irg)));
 795                                 for (t = T_FIRST; t < T_LAST+1; ++t) {
 796                                         double val = ir_timer_elapsed_usec(be_timers[t]) / 1000.0;
 797                                         printf("%-20s: %10.3f msec\n", get_timer_name(t), val);
 798                                 }
 799                         }
 800                         for (t = T_FIRST; t < T_LAST+1; ++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
 809         be_gas_end_compilation_unit(&env);
 810         be_emit_exit();
 811
 812         arch_env_end_codegeneration(arch_env);
 813
 814         be_done_env(&env);
 815
 816         be_info_free();
 817 }
 818
 819 /* Main interface to the frontend. */
 820 void be_main(FILE *file_handle, const char *cup_name)
 821 {
 822         ir_timer_t *t = NULL;
 823
 824         if (be_options.timing == BE_TIME_ON) {
 825                 t = ir_timer_new();
 826
 827                 if (ir_timer_enter_high_priority()) {
 828                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 829                 }
 830
 831                 ir_timer_reset_and_start(t);
 832         }
 833
 834         if (be_options.statev) {
 835                 const char *dot = strrchr(cup_name, '.');
 836                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 837                 char       *buf = ALLOCAN(char, pos - cup_name + 1);
 838                 strncpy(buf, cup_name, pos - cup_name);
 839                 buf[pos - cup_name] = '\0';
 840
 841                 be_options.statev = 1;
 842                 stat_ev_begin(buf, be_options.filtev);
 843                 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
 844         }
 845
 846         be_main_loop(file_handle, cup_name);
 847
 848         if (be_options.timing == BE_TIME_ON) {
 849                 ir_timer_stop(t);
 850                 ir_timer_leave_high_priority();
 851                 if (stat_ev_enabled) {
 852                         stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
 853                 } else {
 854                         double val = ir_timer_elapsed_usec(t) / 1000.0;
 855                         printf("%-20s: %10.3f msec\n", "BEMAINLOOP", val);
 856                 }
 857         }
 858
 859         if (be_options.statev) {
 860                 stat_ev_ctx_pop("bemain_compilation_unit");
 861                 stat_ev_end();
 862         }
 863 }
 864
 865 static int do_lower_for_target(ir_prog *irp, void *context)
 866 {
 867         be_lower_for_target();
 868         (void) context;
 869         (void) irp;
 870         return 0;
 871 }
 872
 873 ir_prog_pass_t *lower_for_target_pass(const char *name)
 874 {
 875         ir_prog_pass_t *pass = XMALLOCZ(ir_prog_pass_t);
 876         return def_prog_pass_constructor(pass,
 877                                          name ? name : "lower_for_target",
 878                                          do_lower_for_target);
 879 }