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 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include <stdarg.h>
  32 #include <stdio.h>
  33
  34 #include "lc_opts.h"
  35 #include "lc_opts_enum.h"
  36
  37 #include "obst.h"
  38 #include "bitset.h"
  39
  40 #include "irprog.h"
  41 #include "irgopt.h"
  42 #include "irgraph.h"
  43 #include "irdump.h"
  44 #include "phiclass.h"
  45 #include "irdom_t.h"
  46 #include "iredges_t.h"
  47 #include "irloop_t.h"
  48 #include "irtools.h"
  49 #include "irvrfy.h"
  50 #include "irprintf.h"
  51 #include "iroptimize.h"
  52 #include "firmstat.h"
  53 #include "execfreq.h"
  54 #include "irprofile.h"
  55
  56 #include "bearch_t.h"
  57 #include "be_t.h"
  58 #include "bemodule.h"
  59 #include "beutil.h"
  60 #include "benode_t.h"
  61 #include "beirgmod.h"
  62 #include "besched_t.h"
  63 #include "belistsched.h"
  64 #include "belive_t.h"
  65 #include "bera.h"
  66 #include "bechordal_t.h"
  67 #include "beifg.h"
  68 #include "beifg_impl.h"
  69 #include "becopyopt.h"
  70 #include "becopystat.h"
  71 #include "bessadestr.h"
  72 #include "beabi.h"
  73 #include "belower.h"
  74 #include "beschedmris.h"
  75 #include "bestat.h"
  76 #include "beverify.h"
  77 #include "be_dbgout.h"
  78 #include "beirg_t.h"
  79
  80 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
  81
  82 #ifdef WITH_ILP
  83 #include "beilpsched.h"
  84 #endif /* WITH_ILP */
  85
  86 /* options visible for anyone */
  87 static be_options_t be_options = {
  88         DUMP_NONE,                         /* dump flags */
  89         BE_TIME_OFF,                       /* no timing */
  90         0,                                 /* no opt profile */
  91         0,                                 /* try to omit frame pointer */
  92         0,                                 /* try to omit leaf frame pointer */
  93         0,                                 /* create PIC code */
  94         0,                                 /* create gprof compatible profiling code */
  95         BE_VRFY_WARN,                      /* verification level: warn */
  96         BE_SCHED_LIST,                     /* scheduler: list scheduler */
  97         "linux",                           /* target OS name */
  98         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
  99         "cplex",                           /* ilp solver */
 100         0,                                 /* enable statistic event dumping */
 101         "",                                /* print stat events */
 102 };
 103
 104 /* config file. */
 105 static char config_file[256] = { 0 };
 106
 107 /* back end instruction set architecture to use */
 108 static const arch_isa_if_t *isa_if = NULL;
 109
 110 /* possible dumping options */
 111 static const lc_opt_enum_mask_items_t dump_items[] = {
 112         { "none",       DUMP_NONE },
 113         { "initial",    DUMP_INITIAL },
 114         { "abi",        DUMP_ABI    },
 115         { "sched",      DUMP_SCHED  },
 116         { "prepared",   DUMP_PREPARED },
 117         { "regalloc",   DUMP_RA },
 118         { "final",      DUMP_FINAL },
 119         { "be",         DUMP_BE },
 120         { "all",        2 * DUMP_BE - 1 },
 121         { NULL,         0 }
 122 };
 123
 124 /* verify options. */
 125 static const lc_opt_enum_int_items_t vrfy_items[] = {
 126         { "off",    BE_VRFY_OFF    },
 127         { "warn",   BE_VRFY_WARN   },
 128         { "assert", BE_VRFY_ASSERT },
 129         { NULL,     0 }
 130 };
 131
 132 /* scheduling options. */
 133 static const lc_opt_enum_int_items_t sched_items[] = {
 134         { "list", BE_SCHED_LIST },
 135 #ifdef WITH_ILP
 136         { "ilp",  BE_SCHED_ILP  },
 137 #endif /* WITH_ILP */
 138         { NULL,   0 }
 139 };
 140
 141 static lc_opt_enum_mask_var_t dump_var = {
 142         &be_options.dump_flags, dump_items
 143 };
 144
 145 static lc_opt_enum_int_var_t vrfy_var = {
 146         &be_options.vrfy_option, vrfy_items
 147 };
 148
 149 static lc_opt_enum_int_var_t sched_var = {
 150         &be_options.scheduler, sched_items
 151 };
 152
 153 static const lc_opt_table_entry_t be_main_options[] = {
 154         LC_OPT_ENT_STR      ("config",     "read another config file containing backend options", config_file, sizeof(config_file)),
 155         LC_OPT_ENT_ENUM_MASK("dump",       "dump irg on several occasions",                       &dump_var),
 156         LC_OPT_ENT_BOOL     ("omitfp",     "omit frame pointer",                                  &be_options.omit_fp),
 157         LC_OPT_ENT_BOOL     ("omitleaffp", "omit frame pointer in leaf routines",                 &be_options.omit_leaf_fp),
 158         LC_OPT_ENT_BOOL     ("pic",        "create PIC code",                                     &be_options.pic),
 159         LC_OPT_ENT_BOOL     ("gprof",      "create gprof profiling code",                         &be_options.gprof),
 160         LC_OPT_ENT_ENUM_PTR ("vrfy",       "verify the backend irg",                              &vrfy_var),
 161         LC_OPT_ENT_BOOL     ("time",       "get backend timing statistics",                       &be_options.timing),
 162         LC_OPT_ENT_BOOL     ("profile",    "instrument the code for execution count profiling",   &be_options.opt_profile),
 163         LC_OPT_ENT_ENUM_PTR ("sched",      "select a scheduler",                                  &sched_var),
 164         LC_OPT_ENT_STR      ("os",         "specify target operating system",                     &be_options.target_os, sizeof(be_options.target_os)),
 165 #ifdef FIRM_STATISTICS
 166         LC_OPT_ENT_BOOL     ("statev",     "dump statistic events",                               &be_options.statev),
 167         LC_OPT_ENT_STR      ("filtev",     "filter for stat events (regex if support is active",  &be_options.filtev, sizeof(be_options.filtev)),
 168 #endif
 169
 170 #ifdef WITH_ILP
 171         LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
 172         LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
 173 #endif /* WITH_ILP */
 174         LC_OPT_LAST
 175 };
 176
 177 static be_module_list_entry_t *isa_ifs = NULL;
 178
 179
 180 unsigned short asm_constraint_flags[256];
 181
 182 void be_init_default_asm_constraint_flags(void)
 183 {
 184         asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 185         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 186         asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 187                 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
 188         asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
 189                 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
 190         asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 191
 192         asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
 193                 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
 194         asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
 195                 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
 196
 197         asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 198         asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 199         asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 200         asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 201         asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 202         asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 203         asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 204         asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 205         asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 206         asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 207         asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 208         asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 209         asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 210         asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 211
 212         asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 213         asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 214         asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 215         asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 216         asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
 217
 218         asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 219         asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 220         asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 221         asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 222         asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 223         asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 224         asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 225         asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 226         asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 227         asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 228         asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
 229
 230         asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
 231                 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
 232                 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
 233
 234         /* these should have been catched by the parsing code already */
 235         asm_constraint_flags['#']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 236         asm_constraint_flags['*']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 237         asm_constraint_flags[' ']  = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 238         asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 239         asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 240         asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
 241 }
 242
 243 asm_constraint_flags_t parse_asm_constraints(const char *constraint)
 244 {
 245         const char             *c;
 246         asm_constraint_flags_t  flags;
 247         asm_constraint_flags_t  tflags;
 248
 249         for (c = constraint; *c != '\0'; ++c) {
 250                 switch (*c) {
 251                 case '#':
 252                         /* 'comment' stuff */
 253                         while(*c != 0 && *c != ',')
 254                                 ++c;
 255                         break;
 256                 case '*':
 257                         /* 'comment' character */
 258                         ++c;
 259                         break;
 260                 case ' ':
 261                 case '\t':
 262                 case '\n':
 263                 case '\r':
 264                         break;
 265                 default:
 266                         tflags = asm_constraint_flags[(int) *c];
 267                         if (tflags != 0) {
 268                                 flags |= tflags;
 269                         } else {
 270                                 flags |= isa_if->parse_asm_constraint(isa_if, &c);
 271                         }
 272                         break;
 273                 }
 274         }
 275
 276         if ( ((flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)
 277                         && (flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE))
 278                 || ((flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ
 279                         && (flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)))) {
 280                 flags |= ASM_CONSTRAINT_FLAG_INVALID;
 281         }
 282
 283         return flags;
 284 }
 285
 286 bool is_valid_clobber(const char *clobber)
 287 {
 288         /* memory is a valid clobber. (the frontend has to detect this case too,
 289          * because it has to add memory edges to the asm) */
 290         if (strcmp(clobber, "memory") == 0)
 291                 return true;
 292
 293         return isa_if->is_valid_clobber(isa_if, clobber);
 294 }
 295
 296 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 297 {
 298         if (isa_if == NULL)
 299                 isa_if = isa;
 300
 301         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 302 }
 303
 304 void be_opt_register(void)
 305 {
 306         lc_opt_entry_t *be_grp;
 307         static int run_once = 0;
 308
 309         if (run_once) {
 310                 return;
 311         }
 312         run_once     = 1;
 313
 314         be_init_modules();
 315
 316         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 317         lc_opt_add_table(be_grp, be_main_options);
 318
 319         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 320                                &isa_ifs, (void**) &isa_if);
 321 }
 322
 323 /* Parse one argument. */
 324 int be_parse_arg(const char *arg) {
 325         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 326         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 327                 lc_opt_print_help(be_grp, stdout);
 328                 return -1;
 329         }
 330         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 331 }
 332
 333 /** The be parameters returned by default, all off. */
 334 static const backend_params be_params = {
 335         0,    /* need dword lowering */
 336         0,    /* don't support inline assembler yet */
 337         0,     /* no immediate floating point mode. */
 338         NULL, /* no additional opcodes */
 339         NULL, /* will be set later */
 340         NULL, /* but yet no creator function */
 341         NULL, /* context for create_intrinsic_fkt */
 342         NULL, /* no if conversion settings */
 343         NULL   /* no immediate fp mode */
 344 };
 345
 346 /* Perform schedule verification if requested. */
 347 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 348         if (vrfy_opt == BE_VRFY_WARN) {
 349                 be_verify_schedule(birg);
 350         } else if (vrfy_opt == BE_VRFY_ASSERT) {
 351                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
 352         }
 353 }
 354
 355 /* Initialize the Firm backend. Must be run first in init_firm()! */
 356 void firm_be_init(void)
 357 {
 358         be_opt_register();
 359         be_init_modules();
 360 }
 361
 362 /* Returns the backend parameter */
 363 const backend_params *be_get_backend_param(void)
 364 {
 365         if (isa_if->get_params)
 366                 return isa_if->get_params();
 367         return &be_params;
 368 }
 369
 370 /**
 371  * Initializes the main environment for the backend.
 372  *
 373  * @param env          an empty environment
 374  * @param file_handle  the file handle where the output will be written to
 375  */
 376 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 377 {
 378         memset(env, 0, sizeof(*env));
 379         env->options              = &be_options;
 380         env->ent_trampoline_map   = pmap_create();
 381         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 382         env->ent_pic_symbol_map   = pmap_create();
 383         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 384
 385         remove_irp_type(env->pic_trampolines_type);
 386         remove_irp_type(env->pic_symbols_type);
 387         set_class_final(env->pic_trampolines_type, 1);
 388
 389         memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
 390         env->arch_env = arch_env_init(isa_if, file_handle, env);
 391
 392         be_phi_handler_new(env);
 393
 394         be_dbg_open();
 395         return env;
 396 }
 397
 398 /**
 399  * Called when the be_main_env_t can be destroyed.
 400  */
 401 static void be_done_env(be_main_env_t *env)
 402 {
 403         arch_env_done(env->arch_env);
 404         be_dbg_close();
 405         be_phi_handler_free();
 406
 407         pmap_destroy(env->ent_trampoline_map);
 408         pmap_destroy(env->ent_pic_symbol_map);
 409         free_type(env->pic_trampolines_type);
 410         free_type(env->pic_symbols_type);
 411 }
 412
 413 /**
 414  * A wrapper around a firm dumper. Dumps only, if
 415  * flags are enabled.
 416  *
 417  * @param mask    a bitmask containing the reason what will be dumped
 418  * @param irg     the IR graph to dump
 419  * @param suffix  the suffix for the dumper
 420  * @param dumper  the dumper to be called
 421  */
 422 static void dump(int mask, ir_graph *irg, const char *suffix,
 423                  void (*dumper)(ir_graph *, const char *))
 424 {
 425         if(be_options.dump_flags & mask)
 426                 be_dump(irg, suffix, dumper);
 427 }
 428
 429 /**
 430  * Prepare a backend graph for code generation and initialize its birg
 431  */
 432 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 433 {
 434         memset(birg, 0, sizeof(*birg));
 435         birg->irg = irg;
 436         birg->main_env = env;
 437
 438         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 439         edges_activate_kind(irg, EDGE_KIND_DEP);
 440
 441         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 442
 443         be_stat_init_irg(env->arch_env, irg);
 444         be_do_stat_nodes(irg, "01 Begin");
 445
 446         /* set the current graph (this is important for several firm functions) */
 447         current_ir_graph = irg;
 448
 449         /* Normalize proj nodes. */
 450         normalize_proj_nodes(irg);
 451
 452         /* we do this before critical edge split. As this produces less returns,
 453            because sometimes (= 164.gzip) multiple returns are slower */
 454         normalize_n_returns(irg);
 455
 456         /* Remove critical edges */
 457         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 458
 459         /* Ensure, that the ir_edges are computed. */
 460         edges_assure(irg);
 461
 462         set_irg_phase_state(irg, phase_backend);
 463
 464         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 465 }
 466
 467 #define BE_TIMER_ONLY(code)   do { if (be_timing) { code; } } while(0)
 468
 469 int be_timing;
 470 ir_timer_t *t_abi;
 471 ir_timer_t *t_codegen;
 472 ir_timer_t *t_sched;
 473 ir_timer_t *t_constr;
 474 ir_timer_t *t_finish;
 475 ir_timer_t *t_emit;
 476 ir_timer_t *t_other;
 477 ir_timer_t *t_verify;
 478 ir_timer_t *t_heights;
 479 ir_timer_t *t_live;
 480 ir_timer_t *t_execfreq;
 481 ir_timer_t *t_ssa_constr;
 482 ir_timer_t *t_ra_constr;
 483 ir_timer_t *t_ra_prolog;
 484 ir_timer_t *t_ra_epilog;
 485 ir_timer_t *t_ra_spill;
 486 ir_timer_t *t_ra_spill_apply;
 487 ir_timer_t *t_ra_color;
 488 ir_timer_t *t_ra_ifg;
 489 ir_timer_t *t_ra_copymin;
 490 ir_timer_t *t_ra_ssa;
 491 ir_timer_t *t_ra_other;
 492
 493 /**
 494  * The Firm backend main loop.
 495  * Do architecture specific lowering for all graphs
 496  * and call the architecture specific code generator.
 497  *
 498  * @param file_handle   the file handle the output will be written to
 499  * @param cup_name      name of the compilation unit
 500  */
 501 static void be_main_loop(FILE *file_handle, const char *cup_name)
 502 {
 503         int i;
 504         be_main_env_t env;
 505         char prof_filename[256];
 506         static const char suffix[] = ".prof";
 507         be_irg_t *birgs;
 508         int num_birgs;
 509         ir_graph **irg_list, **backend_irg_list;
 510         arch_env_t *arch_env;
 511
 512         be_timing = (be_options.timing == BE_TIME_ON);
 513
 514         if (be_timing) {
 515                 t_abi        = ir_timer_register("time_beabi",       "be abi introduction");
 516                 t_codegen    = ir_timer_register("time_codegen",     "codegeneration");
 517                 t_sched      = ir_timer_register("time_sched",       "scheduling");
 518                 t_constr     = ir_timer_register("time_constr",      "assure constraints");
 519                 t_finish     = ir_timer_register("time_finish",      "graph finish");
 520                 t_emit       = ir_timer_register("time_emiter",      "code emiter");
 521                 t_verify     = ir_timer_register("time_verify",      "graph verification");
 522                 t_other      = ir_timer_register("time_other",       "other");
 523                 t_heights    = ir_timer_register("time_heights",     "heights");
 524                 t_live       = ir_timer_register("time_liveness",    "be liveness");
 525                 t_execfreq   = ir_timer_register("time_execfreq",    "execfreq");
 526                 t_ssa_constr = ir_timer_register("time_ssa_constr",  "ssa reconstruction");
 527                 t_ra_prolog  = ir_timer_register("time_ra_prolog",   "regalloc prolog");
 528                 t_ra_epilog  = ir_timer_register("time_ra_epilog",   "regalloc epilog");
 529                 t_ra_constr  = ir_timer_register("time_ra_constr",   "regalloc constraints");
 530                 t_ra_spill   = ir_timer_register("time_ra_spill",    "spiller");
 531                 t_ra_spill_apply
 532                         = ir_timer_register("time_ra_spill_apply", "apply spills");
 533                 t_ra_color   = ir_timer_register("time_ra_color",    "graph coloring");
 534                 t_ra_ifg     = ir_timer_register("time_ra_ifg",      "interference graph");
 535                 t_ra_copymin = ir_timer_register("time_ra_copymin",  "copy minimization");
 536                 t_ra_ssa     = ir_timer_register("time_ra_ssadestr", "ssa destruction");
 537                 t_ra_other   = ir_timer_register("time_ra_other",    "regalloc other");
 538         }
 539
 540         be_init_env(&env, file_handle);
 541         env.cup_name = cup_name;
 542
 543         be_dbg_so(cup_name);
 544         be_dbg_types();
 545
 546         arch_env = env.arch_env;
 547
 548         /* backend may provide an ordered list of irgs where code should be generated for */
 549         irg_list         = NEW_ARR_F(ir_graph *, 0);
 550         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 551
 552         /* we might need 1 birg more for instrumentation constructor */
 553         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 554         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 555
 556         /* First: initialize all birgs */
 557         for(i = 0; i < num_birgs; ++i) {
 558                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 559                 initialize_birg(&birgs[i], irg, &env);
 560         }
 561         DEL_ARR_F(irg_list);
 562
 563         /*
 564                 Get the filename for the profiling data.
 565                 Beware: '\0' is already included in sizeof(suffix)
 566         */
 567         memset(prof_filename, 0, sizeof(prof_filename));
 568         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 569         strcat(prof_filename, suffix);
 570
 571         /*
 572                 Next: Either instruments all irgs with profiling code
 573                 or try to read in profile data for current translation unit.
 574         */
 575         if (be_options.opt_profile) {
 576                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 577                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 578                 num_birgs++;
 579         } else {
 580                 ir_profile_read(prof_filename);
 581         }
 582
 583         /* For all graphs */
 584         for (i = 0; i < num_birgs; ++i) {
 585                 be_irg_t *birg = &birgs[i];
 586                 ir_graph *irg  = birg->irg;
 587                 optimization_state_t state;
 588                 const arch_code_generator_if_t *cg_if;
 589
 590                 /* set the current graph (this is important for several firm functions) */
 591                 current_ir_graph = irg;
 592
 593 #if 0
 594                 {
 595                         unsigned percent = 100*i/num_birgs;
 596                         ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
 597                 }
 598 #endif
 599                 be_sched_init_phase(irg);
 600
 601                 /* reset the phi handler. */
 602                 be_phi_handler_reset();
 603
 604                 stat_ev_ctx_push_fobj("bemain_irg", irg);
 605
 606                 /* stop and reset timers */
 607                 BE_TIMER_PUSH(t_other);   /* t_other */
 608
 609                 /* Verify the initial graph */
 610                 BE_TIMER_PUSH(t_verify);
 611                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 612                         irg_verify(irg, VRFY_ENFORCE_SSA);
 613                         be_check_dominance(irg);
 614                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 615                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 616                         assert(be_check_dominance(irg) && "Dominance verification failed");
 617                 }
 618                 BE_TIMER_POP(t_verify);
 619
 620                 /* Get the code generator interface. */
 621                 cg_if = arch_env_get_code_generator_if(arch_env);
 622
 623                 /* get a code generator for this graph. */
 624                 birg->cg = cg_if->init(birg);
 625
 626                 /* some transformations need to be done before abi introduce */
 627                 arch_code_generator_before_abi(birg->cg);
 628
 629                 /* implement the ABI conventions. */
 630                 BE_TIMER_PUSH(t_abi);
 631                 birg->abi = be_abi_introduce(birg);
 632                 BE_TIMER_POP(t_abi);
 633
 634                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 635                 be_do_stat_nodes(irg, "02 Abi");
 636
 637                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 638                         be_check_dominance(irg);
 639                         be_verify_out_edges(irg);
 640                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 641                         assert(be_verify_out_edges(irg));
 642                         assert(be_check_dominance(irg) && "Dominance verification failed");
 643                 }
 644
 645                 /* generate code */
 646                 stat_ev_ctx_push_str("bemain_phase", "prepare");
 647                 BE_TIMER_PUSH(t_codegen);
 648                 arch_code_generator_prepare_graph(birg->cg);
 649                 BE_TIMER_POP(t_codegen);
 650                 stat_ev_ctx_pop("bemain_phase");
 651
 652                 /* reset the phi handler. */
 653                 be_phi_handler_reset();
 654
 655                 be_do_stat_nodes(irg, "03 Prepare");
 656
 657                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 658
 659                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 660                         be_check_dominance(irg);
 661                         be_verify_out_edges(irg);
 662                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 663                         assert(be_verify_out_edges(irg));
 664                         assert(be_check_dominance(irg) && "Dominance verification failed");
 665                 }
 666
 667                 BE_TIMER_PUSH(t_execfreq);
 668                 /**
 669                  * Create execution frequencies from profile data or estimate some
 670                  */
 671                 if (ir_profile_has_data())
 672                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 673                 else
 674                         birg->exec_freq = compute_execfreq(irg, 10);
 675                 BE_TIMER_POP(t_execfreq);
 676
 677
 678                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 679                 /* be_live_chk_compare(birg); */
 680
 681                 /* let backend prepare scheduling */
 682                 stat_ev_ctx_push_str("bemain_phase", "before_sched");
 683                 BE_TIMER_PUSH(t_codegen);
 684                 arch_code_generator_before_sched(birg->cg);
 685                 BE_TIMER_POP(t_codegen);
 686                 stat_ev_ctx_pop("bemain_phase");
 687
 688                 /* schedule the irg */
 689                 BE_TIMER_PUSH(t_sched);
 690                 switch (be_options.scheduler) {
 691                         default:
 692                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 693                         case BE_SCHED_LIST:
 694                                 list_sched(birg, &be_options);
 695                                 break;
 696 #ifdef WITH_ILP
 697                         case BE_SCHED_ILP:
 698                                 be_ilp_sched(birg, &be_options);
 699                                 break;
 700 #endif /* WITH_ILP */
 701                 };
 702                 BE_TIMER_POP(t_sched);
 703
 704                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 705
 706                 /* check schedule */
 707                 BE_TIMER_PUSH(t_verify);
 708                 be_sched_vrfy(birg, be_options.vrfy_option);
 709                 BE_TIMER_POP(t_verify);
 710
 711                 be_do_stat_nodes(irg, "04 Schedule");
 712
 713                 /* introduce patterns to assure constraints */
 714                 BE_TIMER_PUSH(t_constr);
 715                 /* we switch off optimizations here, because they might cause trouble */
 716                 save_optimization_state(&state);
 717                 set_optimize(0);
 718                 set_opt_normalize(0);
 719                 set_opt_cse(0);
 720
 721                 assert(!get_opt_cse());
 722
 723                 /* add Keeps for should_be_different constrained nodes  */
 724                 /* beware: needs schedule due to usage of be_ssa_constr */
 725                 assure_constraints(birg);
 726                 BE_TIMER_POP(t_constr);
 727
 728                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 729                 be_do_stat_nodes(irg, "05 Constraints");
 730
 731                 /* stuff needs to be done after scheduling but before register allocation */
 732                 BE_TIMER_PUSH(t_codegen);
 733                 arch_code_generator_before_ra(birg->cg);
 734                 BE_TIMER_POP(t_codegen);
 735
 736                 /* connect all stack modifying nodes together (see beabi.c) */
 737                 BE_TIMER_PUSH(t_abi);
 738                 be_abi_fix_stack_nodes(birg->abi);
 739                 BE_TIMER_POP(t_abi);
 740
 741                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 742
 743                 /* check schedule */
 744                 BE_TIMER_PUSH(t_verify);
 745                 be_sched_vrfy(birg, be_options.vrfy_option);
 746                 BE_TIMER_POP(t_verify);
 747
 748                 /* do some statistics */
 749                 //be_do_stat_reg_pressure(birg);
 750
 751 #ifdef FIRM_STATISTICS
 752                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 753 #endif
 754
 755                 /* Do register allocation */
 756                 be_allocate_registers(birg);
 757
 758 #ifdef FIRM_STATISTICS
 759                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 760 #endif
 761
 762                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 763                 be_do_stat_nodes(irg, "06 Register Allocation");
 764
 765                 /* let the code generator prepare the graph for emitter */
 766                 BE_TIMER_PUSH(t_finish);
 767                 arch_code_generator_after_ra(birg->cg);
 768                 BE_TIMER_POP(t_finish);
 769
 770                 /* fix stack offsets */
 771                 BE_TIMER_PUSH(t_abi);
 772                 be_abi_fix_stack_nodes(birg->abi);
 773                 be_remove_dead_nodes_from_schedule(birg);
 774                 be_abi_fix_stack_bias(birg->abi);
 775                 BE_TIMER_POP(t_abi);
 776
 777                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 778
 779                 BE_TIMER_PUSH(t_finish);
 780                 arch_code_generator_finish(birg->cg);
 781                 BE_TIMER_POP(t_finish);
 782
 783                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 784
 785                 /* check schedule and register allocation */
 786                 BE_TIMER_PUSH(t_verify);
 787                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 788                         irg_verify(irg, VRFY_ENFORCE_SSA);
 789                         be_check_dominance(irg);
 790                         be_verify_out_edges(irg);
 791                         be_verify_schedule(birg);
 792                         be_verify_register_allocation(birg);
 793                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 794                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 795                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 796                         assert(be_check_dominance(irg) && "Dominance verification failed");
 797                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 798                         assert(be_verify_register_allocation(birg)
 799                                && "register allocation verification failed");
 800
 801                 }
 802                 BE_TIMER_POP(t_verify);
 803
 804                 /* emit assembler code */
 805                 BE_TIMER_PUSH(t_emit);
 806                 arch_code_generator_done(birg->cg);
 807                 BE_TIMER_POP(t_emit);
 808
 809                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 810
 811                 BE_TIMER_PUSH(t_abi);
 812                 be_abi_free(birg->abi);
 813                 BE_TIMER_POP(t_abi);
 814
 815                 be_do_stat_nodes(irg, "07 Final");
 816                 restore_optimization_state(&state);
 817
 818                 BE_TIMER_POP(t_other);
 819
 820 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
 821
 822 #define LC_EMIT(timer)  \
 823                 stat_ev_if {    \
 824                         stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer));  \
 825                 } else { \
 826                         printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
 827                 } \
 828                 STOP_AND_RESET_TIMER(timer);
 829
 830                 BE_TIMER_ONLY(
 831                         stat_ev_if {
 832                         } else {
 833                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 834                         }
 835                         LC_EMIT(t_abi);
 836                         LC_EMIT(t_codegen);
 837                         LC_EMIT(t_sched);
 838                         LC_EMIT(t_live);
 839                         LC_EMIT(t_heights);
 840                         LC_EMIT(t_ssa_constr);
 841                         LC_EMIT(t_constr);
 842                         LC_EMIT(t_execfreq);
 843                         LC_EMIT(t_ra_prolog);
 844                         LC_EMIT(t_ra_spill);
 845                         LC_EMIT(t_ra_spill_apply);
 846                         LC_EMIT(t_ra_constr);
 847                         LC_EMIT(t_ra_color);
 848                         LC_EMIT(t_ra_ifg);
 849                         LC_EMIT(t_ra_copymin);
 850                         LC_EMIT(t_ra_ssa);
 851                         LC_EMIT(t_ra_epilog);
 852                         LC_EMIT(t_ra_other);
 853                         LC_EMIT(t_finish);
 854                         LC_EMIT(t_emit);
 855                         LC_EMIT(t_verify);
 856                         LC_EMIT(t_other);
 857                 );
 858 #undef LC_EMIT
 859
 860                 be_sched_free_phase(irg);
 861
 862                 be_free_birg(birg);
 863
 864         /* switched off due to statistics (statistic module needs all irgs) */
 865 #if 0   /* STA needs irgs */
 866 #ifdef FIRM_STATISTICS
 867                 if (! stat_is_active())
 868 #endif /* FIRM_STATISTICS */
 869                         free_ir_graph(irg);
 870 #endif /* if 0 */
 871                 stat_ev_ctx_pop("bemain_irg");
 872         }
 873         ir_profile_free();
 874         be_done_env(&env);
 875 }
 876
 877 /* Main interface to the frontend. */
 878 void be_main(FILE *file_handle, const char *cup_name)
 879 {
 880         ir_timer_t *t = NULL;
 881
 882         /* The user specified another config file to read. do that now. */
 883         if(strlen(config_file) > 0) {
 884                 FILE *f;
 885
 886                 if((f = fopen(config_file, "rt")) != NULL) {
 887                         lc_opt_from_file(config_file, f, NULL);
 888                         fclose(f);
 889                 }
 890         }
 891
 892         if (be_options.timing == BE_TIME_ON) {
 893                 t = ir_timer_register("bemain", "measure complete bemain loop");
 894
 895                 if (ir_timer_enter_high_priority()) {
 896                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 897                 }
 898
 899                 ir_timer_reset_and_start(t);
 900         }
 901
 902 #ifdef FIRM_STATISTICS
 903         if (be_options.statev) {
 904                 const char *dot = strrchr(cup_name, '.');
 905                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 906                 char       *buf = alloca(pos - cup_name + 1);
 907                 strncpy(buf, cup_name, pos - cup_name);
 908                 buf[pos - cup_name] = '\0';
 909
 910                 be_options.statev = 1;
 911                 stat_ev_begin(buf, be_options.filtev);
 912         }
 913 #endif
 914
 915         /* never build code for pseudo irgs */
 916         set_visit_pseudo_irgs(0);
 917
 918         be_node_init();
 919
 920         be_main_loop(file_handle, cup_name);
 921
 922         if (be_options.timing == BE_TIME_ON) {
 923                 ir_timer_stop(t);
 924                 ir_timer_leave_high_priority();
 925                 stat_ev_if {
 926                         stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
 927                 } else {
 928                         printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
 929                 }
 930         }
 931
 932 #ifdef FIRM_STATISTICS
 933         if (be_options.statev)
 934                 stat_ev_end();
 935 #endif
 936 }
 937
 938 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 939 {
 940         if (bs == NULL)
 941                 bs = bitset_alloca(cls->n_regs);
 942         else
 943                 bitset_clear_all(bs);
 944
 945         assert(bitset_size(bs) == (unsigned)cls->n_regs);
 946         arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
 947         bitset_flip_all(bs);
 948         be_abi_put_ignore_regs(birg->abi, cls, bs);
 949
 950         return bitset_popcnt(bs);
 951 }