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 "phiclass.h"
  43 #include "irdom_t.h"
  44 #include "iredges_t.h"
  45 #include "irloop_t.h"
  46 #include "irtools.h"
  47 #include "irvrfy.h"
  48 #include "irprintf.h"
  49 #include "iroptimize.h"
  50 #include "firmstat.h"
  51 #include "execfreq.h"
  52 #include "irprofile.h"
  53
  54 #include "bearch_t.h"
  55 #include "be_t.h"
  56 #include "bemodule.h"
  57 #include "beutil.h"
  58 #include "benode_t.h"
  59 #include "beirgmod.h"
  60 #include "besched_t.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 "beifg_impl.h"
  67 #include "becopyopt.h"
  68 #include "becopystat.h"
  69 #include "bessadestr.h"
  70 #include "beabi.h"
  71 #include "belower.h"
  72 #include "beschedmris.h"
  73 #include "bestat.h"
  74 #include "beverify.h"
  75 #include "be_dbgout.h"
  76 #include "beirg_t.h"
  77
  78 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
  79
  80 #ifdef WITH_ILP
  81 #include "beilpsched.h"
  82 #endif /* WITH_ILP */
  83
  84 /* options visible for anyone */
  85 static be_options_t be_options = {
  86         DUMP_NONE,                         /* dump flags */
  87         BE_TIME_OFF,                       /* no timing */
  88         0,                                 /* no opt profile */
  89         0,                                 /* try to omit frame pointer */
  90         0,                                 /* try to omit leaf frame pointer */
  91         0,                                 /* create PIC code */
  92         0,                                 /* create gprof compatible profiling code */
  93         BE_VRFY_WARN,                      /* verification level: warn */
  94         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  95         "linux",                           /* target OS name */
  96         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  97         "cplex",                           /* ilp solver */
  98         0,                                 /* enable statistic event dumping */
  99         "",                                /* print stat events */
 100 };
 101
 102 /* config file. */
 103 static char config_file[256] = { 0 };
 104
 105 /* back end instruction set architecture to use */
 106 static const arch_isa_if_t *isa_if = NULL;
 107
 108 /* possible dumping options */
 109 static const lc_opt_enum_mask_items_t dump_items[] = {
 110         { "none",       DUMP_NONE },
 111         { "initial",    DUMP_INITIAL },
 112         { "abi",        DUMP_ABI    },
 113         { "sched",      DUMP_SCHED  },
 114         { "prepared",   DUMP_PREPARED },
 115         { "regalloc",   DUMP_RA },
 116         { "final",      DUMP_FINAL },
 117         { "be",         DUMP_BE },
 118         { "all",        2 * DUMP_BE - 1 },
 119         { NULL,         0 }
 120 };
 121
 122 /* verify options. */
 123 static const lc_opt_enum_int_items_t vrfy_items[] = {
 124         { "off",    BE_VRFY_OFF    },
 125         { "warn",   BE_VRFY_WARN   },
 126         { "assert", BE_VRFY_ASSERT },
 127         { NULL,     0 }
 128 };
 129
 130 /* scheduling options. */
 131 static const lc_opt_enum_int_items_t sched_items[] = {
 132         { "list", BE_SCHED_LIST },
 133 #ifdef WITH_ILP
 134         { "ilp",  BE_SCHED_ILP  },
 135 #endif /* WITH_ILP */
 136         { NULL,   0 }
 137 };
 138
 139 static lc_opt_enum_mask_var_t dump_var = {
 140         &be_options.dump_flags, dump_items
 141 };
 142
 143 static lc_opt_enum_int_var_t vrfy_var = {
 144         &be_options.vrfy_option, vrfy_items
 145 };
 146
 147 static lc_opt_enum_int_var_t sched_var = {
 148         &be_options.scheduler, sched_items
 149 };
 150
 151 static const lc_opt_table_entry_t be_main_options[] = {
 152         LC_OPT_ENT_STR      ("config",     "read another config file containing backend options", config_file, sizeof(config_file)),
 153         LC_OPT_ENT_ENUM_MASK("dump",       "dump irg on several occasions",                       &dump_var),
 154         LC_OPT_ENT_BOOL     ("omitfp",     "omit frame pointer",                                  &be_options.omit_fp),
 155         LC_OPT_ENT_BOOL     ("omitleaffp", "omit frame pointer in leaf routines",                 &be_options.omit_leaf_fp),
 156         LC_OPT_ENT_BOOL     ("pic",        "create PIC code",                                     &be_options.pic),
 157         LC_OPT_ENT_BOOL     ("gprof",      "create gprof profiling code",                         &be_options.gprof),
 158         LC_OPT_ENT_ENUM_PTR ("verify",       "verify the backend irg",                              &vrfy_var),
 159         LC_OPT_ENT_BOOL     ("time",       "get backend timing statistics",                       &be_options.timing),
 160         LC_OPT_ENT_BOOL     ("profile",    "instrument the code for execution count profiling",   &be_options.opt_profile),
 161         LC_OPT_ENT_ENUM_PTR ("sched",      "select a scheduler",                                  &sched_var),
 162         LC_OPT_ENT_STR      ("os",         "specify target operating system",                     &be_options.target_os, sizeof(be_options.target_os)),
 163 #ifdef FIRM_STATISTICS
 164         LC_OPT_ENT_BOOL     ("statev",     "dump statistic events",                               &be_options.statev),
 165         LC_OPT_ENT_STR      ("filtev",     "filter for stat events (regex if support is active",  &be_options.filtev, sizeof(be_options.filtev)),
 166 #endif
 167
 168 #ifdef WITH_ILP
 169         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 170         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 171 #endif /* WITH_ILP */
 172         LC_OPT_LAST
 173 };
 174
 175 static be_module_list_entry_t *isa_ifs = NULL;
 176
 177
 178 unsigned short asm_constraint_flags[256];
 179
 180 void be_init_default_asm_constraint_flags(void)
 181 {
 182         asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 183         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 184         asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 185                 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
 186         asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 187                 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
 188         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 189
 190         asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
 191                 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
 192         asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
 193                 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
 194
 195         asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 196         asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 197         asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 198         asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 199         asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 200         asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 201         asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 202         asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 203         asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 204         asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 205         asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 206         asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 207         asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 208         asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 209
 210         asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 211         asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 212         asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 213         asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 214         asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 215
 216         asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 217         asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 218         asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 219         asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 220         asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 221         asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 222         asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 223         asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 224         asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 225         asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 226         asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 227
 228         asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
 229                 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
 230                 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 231
 232         /* these should have been catched by the parsing code already */
 233         asm_constraint_flags['#']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 234         asm_constraint_flags['*']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 235         asm_constraint_flags[' ']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 236         asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 237         asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 238         asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 239 }
 240
 241 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
 242 {
 243         asm_constraint_flags_t  flags = 0;
 244         const char             *c;
 245         asm_constraint_flags_t  tflags;
 246
 247         for (c = constraint; *c != '\0'; ++c) {
 248                 switch (*c) {
 249                 case '#':
 250                         /* 'comment' stuff */
 251                         while(*c != 0 && *c != ',')
 252                                 ++c;
 253                         break;
 254                 case '*':
 255                         /* 'comment' character */
 256                         ++c;
 257                         break;
 258                 case ' ':
 259                 case '\t':
 260                 case '\n':
 261                 case '\r':
 262                         break;
 263                 default:
 264                         tflags = asm_constraint_flags[(int) *c];
 265                         if (tflags != 0) {
 266                                 flags |= tflags;
 267                         } else {
 268                                 flags |= isa_if->parse_asm_constraint(isa_if, &c);
 269                         }
 270                         break;
 271                 }
 272         }
 273
 274         if ((
 275                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
 276                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
 277             ) || (
 278                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
 279                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
 280             )) {
 281                 flags |= ASM_CONSTRAINT_FLAG_INVALID;
 282         }
 283         if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ     |
 284                        ASM_CONSTRAINT_FLAG_MODIFIER_WRITE    |
 285                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
 286                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
 287             )) {
 288                 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
 289         }
 290
 291         return flags;
 292 }
 293
 294 int be_is_valid_clobber(const char *clobber)
 295 {
 296         /* memory is a valid clobber. (the frontend has to detect this case too,
 297          * because it has to add memory edges to the asm) */
 298         if (strcmp(clobber, "memory") == 0)
 299                 return 1;
 300         /* cc (condition code) is always valid */
 301         if (strcmp(clobber, "cc") == 0)
 302                 return 1;
 303
 304         return isa_if->is_valid_clobber(isa_if, clobber);
 305 }
 306
 307 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 308 {
 309         if (isa_if == NULL)
 310                 isa_if = isa;
 311
 312         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 313 }
 314
 315 void be_opt_register(void)
 316 {
 317         lc_opt_entry_t *be_grp;
 318         static int run_once = 0;
 319
 320         if (run_once)
 321                 return;
 322         run_once = 1;
 323
 324         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 325         lc_opt_add_table(be_grp, be_main_options);
 326
 327         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 328                                &isa_ifs, (void**) &isa_if);
 329
 330         be_init_modules();
 331 }
 332
 333 /* Parse one argument. */
 334 int be_parse_arg(const char *arg) {
 335         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 336         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 337                 lc_opt_print_help_for_entry(be_grp, '-', stdout);
 338                 return -1;
 339         }
 340         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 341 }
 342
 343 /** The be parameters returned by default, all off. */
 344 static const backend_params be_params = {
 345         0,    /* need dword lowering */
 346         0,    /* don't support inline assembler yet */
 347         NULL, /* will be set later */
 348         NULL, /* but yet no creator function */
 349         NULL, /* context for create_intrinsic_fkt */
 350         NULL, /* no if conversion settings */
 351         NULL, /* no float arithmetic mode */
 352         0,    /* no trampoline support: size 0 */
 353         0,    /* no trampoline support: align 0 */
 354         NULL, /* no trampoline support: no trampoline builder */
 355         4     /* alignment of stack parameter */
 356 };
 357
 358 /* Perform schedule verification if requested. */
 359 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 360         if (vrfy_opt == BE_VRFY_WARN) {
 361                 be_verify_schedule(birg);
 362         } else if (vrfy_opt == BE_VRFY_ASSERT) {
 363                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
 364         }
 365 }
 366
 367 /* Initialize the Firm backend. Must be run first in init_firm()! */
 368 void firm_be_init(void)
 369 {
 370         be_opt_register();
 371         be_init_modules();
 372 }
 373
 374 /* Finalize the Firm backend. */
 375 void firm_be_finish(void)
 376 {
 377         be_quit_modules();
 378 }
 379
 380 /* Returns the backend parameter */
 381 const backend_params *be_get_backend_param(void)
 382 {
 383         if (isa_if->get_params)
 384                 return isa_if->get_params();
 385         return &be_params;
 386 }
 387
 388 /**
 389  * Initializes the main environment for the backend.
 390  *
 391  * @param env          an empty environment
 392  * @param file_handle  the file handle where the output will be written to
 393  */
 394 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 395 {
 396         memset(env, 0, sizeof(*env));
 397         env->options              = &be_options;
 398         env->ent_trampoline_map   = pmap_create();
 399         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 400         env->ent_pic_symbol_map   = pmap_create();
 401         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 402
 403         remove_irp_type(env->pic_trampolines_type);
 404         remove_irp_type(env->pic_symbols_type);
 405         set_class_final(env->pic_trampolines_type, 1);
 406
 407         memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
 408         env->arch_env = arch_env_init(isa_if, file_handle, env);
 409
 410         be_phi_handler_new();
 411
 412         be_dbg_open();
 413         return env;
 414 }
 415
 416 /**
 417  * Called when the be_main_env_t can be destroyed.
 418  */
 419 static void be_done_env(be_main_env_t *env)
 420 {
 421         arch_env_done(env->arch_env);
 422         be_dbg_close();
 423         be_phi_handler_free();
 424
 425         pmap_destroy(env->ent_trampoline_map);
 426         pmap_destroy(env->ent_pic_symbol_map);
 427         free_type(env->pic_trampolines_type);
 428         free_type(env->pic_symbols_type);
 429 }
 430
 431 /**
 432  * A wrapper around a firm dumper. Dumps only, if
 433  * flags are enabled.
 434  *
 435  * @param mask    a bitmask containing the reason what will be dumped
 436  * @param irg     the IR graph to dump
 437  * @param suffix  the suffix for the dumper
 438  * @param dumper  the dumper to be called
 439  */
 440 static void dump(int mask, ir_graph *irg, const char *suffix,
 441                  void (*dumper)(ir_graph *, const char *))
 442 {
 443         if(be_options.dump_flags & mask)
 444                 be_dump(irg, suffix, dumper);
 445 }
 446
 447 /**
 448  * Prepare a backend graph for code generation and initialize its birg
 449  */
 450 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 451 {
 452         memset(birg, 0, sizeof(*birg));
 453         birg->irg = irg;
 454         birg->main_env = env;
 455
 456         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 457         edges_activate_kind(irg, EDGE_KIND_DEP);
 458
 459         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 460
 461         /* set the current graph (this is important for several firm functions) */
 462         current_ir_graph = irg;
 463
 464         /* Normalize proj nodes. */
 465         normalize_proj_nodes(irg);
 466
 467         /* we do this before critical edge split. As this produces less returns,
 468            because sometimes (= 164.gzip) multiple returns are slower */
 469         normalize_n_returns(irg);
 470
 471         /* Remove critical edges */
 472         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 473
 474         /* Ensure, that the ir_edges are computed. */
 475         edges_assure(irg);
 476
 477         set_irg_phase_state(irg, phase_backend);
 478         be_info_init_irg(irg);
 479
 480         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 481 }
 482
 483 #define BE_TIMER_ONLY(code)   do { if (be_timing) { code; } } while(0)
 484
 485 int be_timing;
 486 ir_timer_t *t_abi;
 487 ir_timer_t *t_codegen;
 488 ir_timer_t *t_ra_preparation;
 489 ir_timer_t *t_sched;
 490 ir_timer_t *t_constr;
 491 ir_timer_t *t_finish;
 492 ir_timer_t *t_emit;
 493 ir_timer_t *t_other;
 494 ir_timer_t *t_verify;
 495 ir_timer_t *t_heights;
 496 ir_timer_t *t_live;
 497 ir_timer_t *t_execfreq;
 498 ir_timer_t *t_ssa_constr;
 499 ir_timer_t *t_ra_constr;
 500 ir_timer_t *t_ra_prolog;
 501 ir_timer_t *t_ra_epilog;
 502 ir_timer_t *t_ra_spill;
 503 ir_timer_t *t_ra_spill_apply;
 504 ir_timer_t *t_ra_color;
 505 ir_timer_t *t_ra_ifg;
 506 ir_timer_t *t_ra_copymin;
 507 ir_timer_t *t_ra_ssa;
 508 ir_timer_t *t_ra_other;
 509
 510 /**
 511  * The Firm backend main loop.
 512  * Do architecture specific lowering for all graphs
 513  * and call the architecture specific code generator.
 514  *
 515  * @param file_handle   the file handle the output will be written to
 516  * @param cup_name      name of the compilation unit
 517  */
 518 static void be_main_loop(FILE *file_handle, const char *cup_name)
 519 {
 520         static const char suffix[] = ".prof";
 521
 522         int           i, num_birgs, stat_active = 0;
 523         be_main_env_t env;
 524         char          prof_filename[256];
 525         be_irg_t      *birgs;
 526         ir_graph      **irg_list, **backend_irg_list;
 527         arch_env_t    *arch_env;
 528
 529         be_timing = (be_options.timing == BE_TIME_ON);
 530
 531         if (be_timing) {
 532                 t_abi        = ir_timer_register("bemain_time_beabi",       "be abi introduction");
 533                 t_codegen    = ir_timer_register("bemain_time_codegen",     "codegeneration");
 534                 t_ra_preparation = ir_timer_register("bemain_time_ra_preparation", "ra preparation");
 535                 t_sched      = ir_timer_register("bemain_time_sched",       "scheduling");
 536                 t_constr     = ir_timer_register("bemain_time_constr",      "assure constraints");
 537                 t_finish     = ir_timer_register("bemain_time_finish",      "graph finish");
 538                 t_emit       = ir_timer_register("bemain_time_emiter",      "code emiter");
 539                 t_verify     = ir_timer_register("bemain_time_verify",      "graph verification");
 540                 t_other      = ir_timer_register("bemain_time_other",       "other");
 541                 t_heights    = ir_timer_register("bemain_time_heights",     "heights");
 542                 t_live       = ir_timer_register("bemain_time_liveness",    "be liveness");
 543                 t_execfreq   = ir_timer_register("bemain_time_execfreq",    "execfreq");
 544                 t_ssa_constr = ir_timer_register("bemain_time_ssa_constr",  "ssa reconstruction");
 545                 t_ra_prolog  = ir_timer_register("bemain_time_ra_prolog",   "regalloc prolog");
 546                 t_ra_epilog  = ir_timer_register("bemain_time_ra_epilog",   "regalloc epilog");
 547                 t_ra_constr  = ir_timer_register("bemain_time_ra_constr",   "regalloc constraints");
 548                 t_ra_spill   = ir_timer_register("bemain_time_ra_spill",    "spiller");
 549                 t_ra_spill_apply
 550                         = ir_timer_register("bemain_time_ra_spill_apply", "apply spills");
 551                 t_ra_color   = ir_timer_register("bemain_time_ra_color",    "graph coloring");
 552                 t_ra_ifg     = ir_timer_register("bemain_time_ra_ifg",      "interference graph");
 553                 t_ra_copymin = ir_timer_register("bemain_time_ra_copymin",  "copy minimization");
 554                 t_ra_ssa     = ir_timer_register("bemain_time_ra_ssadestr", "ssa destruction");
 555                 t_ra_other   = ir_timer_register("bemain_time_ra_other",    "regalloc other");
 556         }
 557
 558         be_init_env(&env, file_handle);
 559         env.cup_name = cup_name;
 560
 561         be_dbg_so(cup_name);
 562         be_dbg_types();
 563
 564         arch_env = env.arch_env;
 565
 566         /* backend may provide an ordered list of irgs where code should be
 567          * generated for */
 568         irg_list         = NEW_ARR_F(ir_graph *, 0);
 569         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 570
 571         /* we might need 1 birg more for instrumentation constructor */
 572         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 573         birgs     = ALLOCAN(be_irg_t, num_birgs + 1);
 574
 575         be_info_init();
 576
 577         /* First: initialize all birgs */
 578         for(i = 0; i < num_birgs; ++i) {
 579                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 580                 initialize_birg(&birgs[i], irg, &env);
 581         }
 582         arch_env_handle_intrinsics(arch_env);
 583         DEL_ARR_F(irg_list);
 584
 585         /*
 586                 Get the filename for the profiling data.
 587                 Beware: '\0' is already included in sizeof(suffix)
 588         */
 589         memset(prof_filename, 0, sizeof(prof_filename));
 590         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 591         strcat(prof_filename, suffix);
 592
 593         /*
 594                 Next: Either instruments all irgs with profiling code
 595                 or try to read in profile data for current translation unit.
 596         */
 597         if (be_options.opt_profile) {
 598                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 599                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 600                 num_birgs++;
 601         } else {
 602                 ir_profile_read(prof_filename);
 603         }
 604
 605 #ifdef FIRM_STATISTICS
 606         stat_active = stat_is_active();
 607 #endif /* FIRM_STATISTICS */
 608
 609         /* For all graphs */
 610         for (i = 0; i < num_birgs; ++i) {
 611                 be_irg_t *birg = &birgs[i];
 612                 ir_graph *irg  = birg->irg;
 613                 optimization_state_t state;
 614                 const arch_code_generator_if_t *cg_if;
 615
 616                 /* set the current graph (this is important for several firm functions) */
 617                 current_ir_graph = irg;
 618
 619                 /* reset the phi handler. */
 620                 be_phi_handler_reset();
 621
 622                 stat_ev_if {
 623                         stat_ev_ctx_push_fobj("bemain_irg", irg);
 624                         be_stat_ev("bemain_insns_start", be_count_insns(irg));
 625                         be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
 626                 }
 627
 628                 /* stop and reset timers */
 629                 BE_TIMER_PUSH(t_other);   /* t_other */
 630
 631                 /* Verify the initial graph */
 632                 BE_TIMER_PUSH(t_verify);
 633                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 634                         irg_verify(irg, VRFY_ENFORCE_SSA);
 635                         be_check_dominance(irg);
 636                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 637                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 638                         assert(be_check_dominance(irg) && "Dominance verification failed");
 639                 }
 640                 BE_TIMER_POP(t_verify);
 641
 642                 /* Get the code generator interface. */
 643                 cg_if = arch_env_get_code_generator_if(arch_env);
 644
 645                 /* get a code generator for this graph. */
 646                 birg->cg = cg_if->init(birg);
 647
 648                 /* some transformations need to be done before abi introduce */
 649                 arch_code_generator_before_abi(birg->cg);
 650
 651                 /* implement the ABI conventions. */
 652                 BE_TIMER_PUSH(t_abi);
 653                 birg->abi = be_abi_introduce(birg);
 654                 BE_TIMER_POP(t_abi);
 655
 656                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 657
 658                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 659                         be_check_dominance(irg);
 660                         be_verify_out_edges(irg);
 661                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 662                         assert(be_verify_out_edges(irg));
 663                         assert(be_check_dominance(irg) && "Dominance verification failed");
 664                 }
 665
 666                 /* generate code */
 667                 BE_TIMER_PUSH(t_codegen);
 668                 arch_code_generator_prepare_graph(birg->cg);
 669                 BE_TIMER_POP(t_codegen);
 670
 671                 /* reset the phi handler. */
 672                 be_phi_handler_reset();
 673
 674                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 675
 676                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 677                         be_check_dominance(irg);
 678                         be_verify_out_edges(irg);
 679                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 680                         assert(be_verify_out_edges(irg));
 681                         assert(be_check_dominance(irg) && "Dominance verification failed");
 682                 }
 683
 684                 BE_TIMER_PUSH(t_execfreq);
 685                 /**
 686                  * Create execution frequencies from profile data or estimate some
 687                  */
 688                 if (ir_profile_has_data())
 689                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 690                 else {
 691                         /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
 692                          * optimize graph phase merges blocks in the x86 backend */
 693                         edges_deactivate(irg);
 694                         birg->exec_freq = compute_execfreq(irg, 10);
 695                 }
 696                 BE_TIMER_POP(t_execfreq);
 697
 698
 699                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 700                 /* be_live_chk_compare(birg); */
 701
 702                 /* schedule the irg */
 703                 BE_TIMER_PUSH(t_sched);
 704                 switch (be_options.scheduler) {
 705                         default:
 706                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 707                         case BE_SCHED_LIST:
 708                                 list_sched(birg, &be_options);
 709                                 break;
 710 #ifdef WITH_ILP
 711                         case BE_SCHED_ILP:
 712                                 be_ilp_sched(birg, &be_options);
 713                                 break;
 714 #endif /* WITH_ILP */
 715                 };
 716                 BE_TIMER_POP(t_sched);
 717
 718                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 719
 720                 /* check schedule */
 721                 BE_TIMER_PUSH(t_verify);
 722                 be_sched_vrfy(birg, be_options.vrfy_option);
 723                 BE_TIMER_POP(t_verify);
 724
 725                 /* introduce patterns to assure constraints */
 726                 BE_TIMER_PUSH(t_constr);
 727                 /* we switch off optimizations here, because they might cause trouble */
 728                 save_optimization_state(&state);
 729                 set_optimize(0);
 730                 set_opt_normalize(0);
 731                 set_opt_cse(0);
 732
 733                 /* add Keeps for should_be_different constrained nodes  */
 734                 /* beware: needs schedule due to usage of be_ssa_constr */
 735                 assure_constraints(birg);
 736                 BE_TIMER_POP(t_constr);
 737
 738                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 739
 740                 /* stuff needs to be done after scheduling but before register allocation */
 741                 BE_TIMER_PUSH(t_ra_preparation);
 742                 arch_code_generator_before_ra(birg->cg);
 743                 BE_TIMER_POP(t_ra_preparation);
 744
 745                 /* connect all stack modifying nodes together (see beabi.c) */
 746                 BE_TIMER_PUSH(t_abi);
 747                 be_abi_fix_stack_nodes(birg->abi);
 748                 BE_TIMER_POP(t_abi);
 749
 750                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 751
 752                 /* check schedule */
 753                 BE_TIMER_PUSH(t_verify);
 754                 be_sched_vrfy(birg, be_options.vrfy_option);
 755                 BE_TIMER_POP(t_verify);
 756
 757                 stat_ev_if {
 758                         stat_ev_dbl("bemain_costs_before_ra",
 759                                         be_estimate_irg_costs(irg, birg->exec_freq));
 760                         be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
 761                         be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
 762                 }
 763
 764                 /* Do register allocation */
 765                 be_allocate_registers(birg);
 766
 767 #ifdef FIRM_STATISTICS
 768                 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
 769 #endif
 770
 771                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 772
 773                 /* let the code generator prepare the graph for emitter */
 774                 BE_TIMER_PUSH(t_finish);
 775                 arch_code_generator_after_ra(birg->cg);
 776                 BE_TIMER_POP(t_finish);
 777
 778                 /* fix stack offsets */
 779                 BE_TIMER_PUSH(t_abi);
 780                 be_abi_fix_stack_nodes(birg->abi);
 781                 be_remove_dead_nodes_from_schedule(birg);
 782                 be_abi_fix_stack_bias(birg->abi);
 783                 BE_TIMER_POP(t_abi);
 784
 785                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 786
 787                 BE_TIMER_PUSH(t_finish);
 788                 arch_code_generator_finish(birg->cg);
 789                 BE_TIMER_POP(t_finish);
 790
 791                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 792
 793                 stat_ev_if {
 794                         be_stat_ev("bemain_insns_finish", be_count_insns(irg));
 795                         be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
 796                 }
 797
 798                 /* check schedule and register allocation */
 799                 BE_TIMER_PUSH(t_verify);
 800                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 801                         irg_verify(irg, VRFY_ENFORCE_SSA);
 802                         be_check_dominance(irg);
 803                         be_verify_out_edges(irg);
 804                         be_verify_schedule(birg);
 805                         be_verify_register_allocation(birg);
 806                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 807                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 808                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 809                         assert(be_check_dominance(irg) && "Dominance verification failed");
 810                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 811                         assert(be_verify_register_allocation(birg)
 812                                && "register allocation verification failed");
 813
 814                 }
 815                 BE_TIMER_POP(t_verify);
 816
 817                 /* emit assembler code */
 818                 BE_TIMER_PUSH(t_emit);
 819                 arch_code_generator_done(birg->cg);
 820                 BE_TIMER_POP(t_emit);
 821
 822                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 823
 824                 BE_TIMER_PUSH(t_abi);
 825                 be_abi_free(birg->abi);
 826                 BE_TIMER_POP(t_abi);
 827
 828                 restore_optimization_state(&state);
 829
 830                 BE_TIMER_POP(t_other);
 831
 832 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
 833
 834 #define LC_EMIT(timer)  \
 835                 stat_ev_if {    \
 836                         stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer));  \
 837                 } else { \
 838                         printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
 839                 } \
 840                 STOP_AND_RESET_TIMER(timer);
 841
 842                 BE_TIMER_ONLY(
 843                         stat_ev_if {
 844                         } else {
 845                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 846                         }
 847                         LC_EMIT(t_abi);
 848                         LC_EMIT(t_codegen);
 849                         LC_EMIT(t_ra_preparation);
 850                         LC_EMIT(t_sched);
 851                         LC_EMIT(t_live);
 852                         LC_EMIT(t_heights);
 853                         LC_EMIT(t_ssa_constr);
 854                         LC_EMIT(t_constr);
 855                         LC_EMIT(t_execfreq);
 856                         LC_EMIT(t_ra_prolog);
 857                         LC_EMIT(t_ra_spill);
 858                         LC_EMIT(t_ra_spill_apply);
 859                         LC_EMIT(t_ra_constr);
 860                         LC_EMIT(t_ra_color);
 861                         LC_EMIT(t_ra_ifg);
 862                         LC_EMIT(t_ra_copymin);
 863                         LC_EMIT(t_ra_ssa);
 864                         LC_EMIT(t_ra_epilog);
 865                         LC_EMIT(t_ra_other);
 866                         LC_EMIT(t_finish);
 867                         LC_EMIT(t_emit);
 868                         LC_EMIT(t_verify);
 869                         LC_EMIT(t_other);
 870                 );
 871 #undef LC_EMIT
 872
 873                 be_free_birg(birg);
 874
 875         /* switched off due to statistics (statistic module needs all irgs) */
 876 #ifdef FIRM_STATISTICS
 877                 if (! stat_active)
 878 #endif /* FIRM_STATISTICS */
 879                         remove_irp_irg(irg);
 880                 stat_ev_ctx_pop("bemain_irg");
 881         }
 882         ir_profile_free();
 883         be_done_env(&env);
 884
 885         be_info_free();
 886 }
 887
 888 /* Main interface to the frontend. */
 889 void be_main(FILE *file_handle, const char *cup_name)
 890 {
 891         ir_timer_t *t = NULL;
 892
 893         /* The user specified another config file to read. do that now. */
 894         if (config_file[0] != '\0') {
 895                 FILE *f = fopen(config_file, "rt");
 896
 897                 if (f != NULL) {
 898                         lc_opt_from_file(config_file, f, NULL);
 899                         fclose(f);
 900                 } else {
 901                         fprintf(stderr, "Warning: Cannot open config file '%s'\n", config_file);
 902                 }
 903         }
 904
 905         if (be_options.timing == BE_TIME_ON) {
 906                 t = ir_timer_register("bemain", "measure complete bemain loop");
 907
 908                 if (ir_timer_enter_high_priority()) {
 909                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 910                 }
 911
 912                 ir_timer_reset_and_start(t);
 913         }
 914
 915 #ifdef FIRM_STATISTICS
 916         if (be_options.statev) {
 917                 const char *dot = strrchr(cup_name, '.');
 918                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 919                 char       *buf = ALLOCAN(char, pos - cup_name + 1);
 920                 strncpy(buf, cup_name, pos - cup_name);
 921                 buf[pos - cup_name] = '\0';
 922
 923                 be_options.statev = 1;
 924                 stat_ev_begin(buf, be_options.filtev);
 925                 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
 926         }
 927 #endif
 928
 929         /* never build code for pseudo irgs */
 930         set_visit_pseudo_irgs(0);
 931
 932         be_main_loop(file_handle, cup_name);
 933
 934         if (be_options.timing == BE_TIME_ON) {
 935                 ir_timer_stop(t);
 936                 ir_timer_leave_high_priority();
 937                 stat_ev_if {
 938                         stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
 939                 } else {
 940                         printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
 941                 }
 942         }
 943
 944 #ifdef FIRM_STATISTICS
 945         if (be_options.statev) {
 946                 stat_ev_ctx_pop("bemain_compilation_unit");
 947                 stat_ev_end();
 948         }
 949 #endif
 950 }
 951
 952 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 953 {
 954         if (bs == NULL)
 955                 bs = bitset_alloca(cls->n_regs);
 956         else
 957                 bitset_clear_all(bs);
 958
 959         assert(bitset_size(bs) == cls->n_regs);
 960         arch_put_non_ignore_regs(cls, bs);
 961         bitset_flip_all(bs);
 962         be_abi_put_ignore_regs(birg->abi, cls, bs);
 963
 964         return bitset_popcnt(bs);
 965 }