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 be_parse_asm_constraints(const char *constraint)
 244 {
 245         asm_constraint_flags_t  flags = 0;
 246         const char             *c;
 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 ((
 277                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
 278                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
 279             ) || (
 280                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
 281                 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
 282             )) {
 283                 flags |= ASM_CONSTRAINT_FLAG_INVALID;
 284         }
 285         if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ     |
 286                        ASM_CONSTRAINT_FLAG_MODIFIER_WRITE    |
 287                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
 288                        ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
 289             )) {
 290                 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
 291         }
 292
 293         return flags;
 294 }
 295
 296 int be_is_valid_clobber(const char *clobber)
 297 {
 298         /* memory is a valid clobber. (the frontend has to detect this case too,
 299          * because it has to add memory edges to the asm) */
 300         if (strcmp(clobber, "memory") == 0)
 301                 return 1;
 302         /* cc (condition code) is always valid */
 303         if (strcmp(clobber, "cc") == 0)
 304                 return 1;
 305
 306         return isa_if->is_valid_clobber(isa_if, clobber);
 307 }
 308
 309 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
 310 {
 311         if (isa_if == NULL)
 312                 isa_if = isa;
 313
 314         be_add_module_to_list(&isa_ifs, name, (void*) isa);
 315 }
 316
 317 void be_opt_register(void)
 318 {
 319         lc_opt_entry_t *be_grp;
 320         static int run_once = 0;
 321
 322         if (run_once) {
 323                 return;
 324         }
 325         run_once     = 1;
 326
 327         be_init_modules();
 328
 329         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 330         lc_opt_add_table(be_grp, be_main_options);
 331
 332         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
 333                                &isa_ifs, (void**) &isa_if);
 334 }
 335
 336 /* Parse one argument. */
 337 int be_parse_arg(const char *arg) {
 338         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 339         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
 340                 lc_opt_print_help(be_grp, stdout);
 341                 return -1;
 342         }
 343         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
 344 }
 345
 346 /** The be parameters returned by default, all off. */
 347 static const backend_params be_params = {
 348         0,    /* need dword lowering */
 349         0,    /* don't support inline assembler yet */
 350         0,     /* no immediate floating point mode. */
 351         NULL, /* no additional opcodes */
 352         NULL, /* will be set later */
 353         NULL, /* but yet no creator function */
 354         NULL, /* context for create_intrinsic_fkt */
 355         NULL, /* no if conversion settings */
 356         NULL   /* no immediate fp mode */
 357 };
 358
 359 /* Perform schedule verification if requested. */
 360 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
 361         if (vrfy_opt == BE_VRFY_WARN) {
 362                 be_verify_schedule(birg);
 363         } else if (vrfy_opt == BE_VRFY_ASSERT) {
 364                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
 365         }
 366 }
 367
 368 /* Initialize the Firm backend. Must be run first in init_firm()! */
 369 void firm_be_init(void)
 370 {
 371         be_opt_register();
 372         be_init_modules();
 373 }
 374
 375 /* Finalize the Firm backend. */
 376 void firm_be_finish(void)
 377 {
 378         be_quit_modules();
 379 }
 380
 381 /* Returns the backend parameter */
 382 const backend_params *be_get_backend_param(void)
 383 {
 384         if (isa_if->get_params)
 385                 return isa_if->get_params();
 386         return &be_params;
 387 }
 388
 389 /**
 390  * Initializes the main environment for the backend.
 391  *
 392  * @param env          an empty environment
 393  * @param file_handle  the file handle where the output will be written to
 394  */
 395 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 396 {
 397         memset(env, 0, sizeof(*env));
 398         env->options              = &be_options;
 399         env->ent_trampoline_map   = pmap_create();
 400         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
 401         env->ent_pic_symbol_map   = pmap_create();
 402         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
 403
 404         remove_irp_type(env->pic_trampolines_type);
 405         remove_irp_type(env->pic_symbols_type);
 406         set_class_final(env->pic_trampolines_type, 1);
 407
 408         memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
 409         env->arch_env = arch_env_init(isa_if, file_handle, env);
 410
 411         be_phi_handler_new(env);
 412
 413         be_dbg_open();
 414         return env;
 415 }
 416
 417 /**
 418  * Called when the be_main_env_t can be destroyed.
 419  */
 420 static void be_done_env(be_main_env_t *env)
 421 {
 422         arch_env_done(env->arch_env);
 423         be_dbg_close();
 424         be_phi_handler_free();
 425
 426         pmap_destroy(env->ent_trampoline_map);
 427         pmap_destroy(env->ent_pic_symbol_map);
 428         free_type(env->pic_trampolines_type);
 429         free_type(env->pic_symbols_type);
 430 }
 431
 432 /**
 433  * A wrapper around a firm dumper. Dumps only, if
 434  * flags are enabled.
 435  *
 436  * @param mask    a bitmask containing the reason what will be dumped
 437  * @param irg     the IR graph to dump
 438  * @param suffix  the suffix for the dumper
 439  * @param dumper  the dumper to be called
 440  */
 441 static void dump(int mask, ir_graph *irg, const char *suffix,
 442                  void (*dumper)(ir_graph *, const char *))
 443 {
 444         if(be_options.dump_flags & mask)
 445                 be_dump(irg, suffix, dumper);
 446 }
 447
 448 /**
 449  * Prepare a backend graph for code generation and initialize its birg
 450  */
 451 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
 452 {
 453         memset(birg, 0, sizeof(*birg));
 454         birg->irg = irg;
 455         birg->main_env = env;
 456
 457         edges_deactivate_kind(irg, EDGE_KIND_DEP);
 458         edges_activate_kind(irg, EDGE_KIND_DEP);
 459
 460         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 461
 462         /* set the current graph (this is important for several firm functions) */
 463         current_ir_graph = irg;
 464
 465         /* Normalize proj nodes. */
 466         normalize_proj_nodes(irg);
 467
 468         /* we do this before critical edge split. As this produces less returns,
 469            because sometimes (= 164.gzip) multiple returns are slower */
 470         normalize_n_returns(irg);
 471
 472         /* Remove critical edges */
 473         remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
 474
 475         /* Ensure, that the ir_edges are computed. */
 476         edges_assure(irg);
 477
 478         set_irg_phase_state(irg, phase_backend);
 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_sched;
 489 ir_timer_t *t_constr;
 490 ir_timer_t *t_finish;
 491 ir_timer_t *t_emit;
 492 ir_timer_t *t_other;
 493 ir_timer_t *t_verify;
 494 ir_timer_t *t_heights;
 495 ir_timer_t *t_live;
 496 ir_timer_t *t_execfreq;
 497 ir_timer_t *t_ssa_constr;
 498 ir_timer_t *t_ra_constr;
 499 ir_timer_t *t_ra_prolog;
 500 ir_timer_t *t_ra_epilog;
 501 ir_timer_t *t_ra_spill;
 502 ir_timer_t *t_ra_spill_apply;
 503 ir_timer_t *t_ra_color;
 504 ir_timer_t *t_ra_ifg;
 505 ir_timer_t *t_ra_copymin;
 506 ir_timer_t *t_ra_ssa;
 507 ir_timer_t *t_ra_other;
 508
 509 /**
 510  * The Firm backend main loop.
 511  * Do architecture specific lowering for all graphs
 512  * and call the architecture specific code generator.
 513  *
 514  * @param file_handle   the file handle the output will be written to
 515  * @param cup_name      name of the compilation unit
 516  */
 517 static void be_main_loop(FILE *file_handle, const char *cup_name)
 518 {
 519         int i;
 520         be_main_env_t env;
 521         char prof_filename[256];
 522         static const char suffix[] = ".prof";
 523         be_irg_t *birgs;
 524         int num_birgs;
 525         ir_graph **irg_list, **backend_irg_list;
 526         arch_env_t *arch_env;
 527
 528         be_timing = (be_options.timing == BE_TIME_ON);
 529
 530         if (be_timing) {
 531                 t_abi        = ir_timer_register("bemain_time_beabi",       "be abi introduction");
 532                 t_codegen    = ir_timer_register("bemain_time_codegen",     "codegeneration");
 533                 t_sched      = ir_timer_register("bemain_time_sched",       "scheduling");
 534                 t_constr     = ir_timer_register("bemain_time_constr",      "assure constraints");
 535                 t_finish     = ir_timer_register("bemain_time_finish",      "graph finish");
 536                 t_emit       = ir_timer_register("bemain_time_emiter",      "code emiter");
 537                 t_verify     = ir_timer_register("bemain_time_verify",      "graph verification");
 538                 t_other      = ir_timer_register("bemain_time_other",       "other");
 539                 t_heights    = ir_timer_register("bemain_time_heights",     "heights");
 540                 t_live       = ir_timer_register("bemain_time_liveness",    "be liveness");
 541                 t_execfreq   = ir_timer_register("bemain_time_execfreq",    "execfreq");
 542                 t_ssa_constr = ir_timer_register("bemain_time_ssa_constr",  "ssa reconstruction");
 543                 t_ra_prolog  = ir_timer_register("bemain_time_ra_prolog",   "regalloc prolog");
 544                 t_ra_epilog  = ir_timer_register("bemain_time_ra_epilog",   "regalloc epilog");
 545                 t_ra_constr  = ir_timer_register("bemain_time_ra_constr",   "regalloc constraints");
 546                 t_ra_spill   = ir_timer_register("bemain_time_ra_spill",    "spiller");
 547                 t_ra_spill_apply
 548                         = ir_timer_register("bemain_time_ra_spill_apply", "apply spills");
 549                 t_ra_color   = ir_timer_register("bemain_time_ra_color",    "graph coloring");
 550                 t_ra_ifg     = ir_timer_register("bemain_time_ra_ifg",      "interference graph");
 551                 t_ra_copymin = ir_timer_register("bemain_time_ra_copymin",  "copy minimization");
 552                 t_ra_ssa     = ir_timer_register("bemain_time_ra_ssadestr", "ssa destruction");
 553                 t_ra_other   = ir_timer_register("bemain_time_ra_other",    "regalloc other");
 554         }
 555
 556         be_init_env(&env, file_handle);
 557         env.cup_name = cup_name;
 558
 559         be_dbg_so(cup_name);
 560         be_dbg_types();
 561
 562         arch_env = env.arch_env;
 563
 564         /* backend may provide an ordered list of irgs where code should be
 565          * generated for */
 566         irg_list         = NEW_ARR_F(ir_graph *, 0);
 567         backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
 568
 569         /* we might need 1 birg more for instrumentation constructor */
 570         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
 571         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
 572
 573         /* First: initialize all birgs */
 574         for(i = 0; i < num_birgs; ++i) {
 575                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
 576                 initialize_birg(&birgs[i], irg, &env);
 577         }
 578         DEL_ARR_F(irg_list);
 579
 580         /*
 581                 Get the filename for the profiling data.
 582                 Beware: '\0' is already included in sizeof(suffix)
 583         */
 584         memset(prof_filename, 0, sizeof(prof_filename));
 585         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
 586         strcat(prof_filename, suffix);
 587
 588         /*
 589                 Next: Either instruments all irgs with profiling code
 590                 or try to read in profile data for current translation unit.
 591         */
 592         if (be_options.opt_profile) {
 593                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
 594                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
 595                 num_birgs++;
 596         } else {
 597                 ir_profile_read(prof_filename);
 598         }
 599
 600         /* For all graphs */
 601         for (i = 0; i < num_birgs; ++i) {
 602                 be_irg_t *birg = &birgs[i];
 603                 ir_graph *irg  = birg->irg;
 604                 optimization_state_t state;
 605                 const arch_code_generator_if_t *cg_if;
 606
 607                 /* set the current graph (this is important for several firm functions) */
 608                 current_ir_graph = irg;
 609
 610                 be_sched_init_phase(irg);
 611
 612                 /* reset the phi handler. */
 613                 be_phi_handler_reset();
 614
 615                 stat_ev_if {
 616                         stat_ev_ctx_push_fobj("bemain_irg", irg);
 617                         be_stat_ev("bemain_insns_start", be_count_insns(irg));
 618                         be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
 619                 }
 620
 621                 /* stop and reset timers */
 622                 BE_TIMER_PUSH(t_other);   /* t_other */
 623
 624                 /* Verify the initial graph */
 625                 BE_TIMER_PUSH(t_verify);
 626                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 627                         irg_verify(irg, VRFY_ENFORCE_SSA);
 628                         be_check_dominance(irg);
 629                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 630                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 631                         assert(be_check_dominance(irg) && "Dominance verification failed");
 632                 }
 633                 BE_TIMER_POP(t_verify);
 634
 635                 /* Get the code generator interface. */
 636                 cg_if = arch_env_get_code_generator_if(arch_env);
 637
 638                 /* get a code generator for this graph. */
 639                 birg->cg = cg_if->init(birg);
 640
 641                 /* some transformations need to be done before abi introduce */
 642                 arch_code_generator_before_abi(birg->cg);
 643
 644                 /* implement the ABI conventions. */
 645                 BE_TIMER_PUSH(t_abi);
 646                 birg->abi = be_abi_introduce(birg);
 647                 BE_TIMER_POP(t_abi);
 648
 649                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
 650
 651                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 652                         be_check_dominance(irg);
 653                         be_verify_out_edges(irg);
 654                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 655                         assert(be_verify_out_edges(irg));
 656                         assert(be_check_dominance(irg) && "Dominance verification failed");
 657                 }
 658
 659                 /* generate code */
 660                 BE_TIMER_PUSH(t_codegen);
 661                 arch_code_generator_prepare_graph(birg->cg);
 662                 BE_TIMER_POP(t_codegen);
 663
 664                 /* reset the phi handler. */
 665                 be_phi_handler_reset();
 666
 667                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 668
 669                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 670                         be_check_dominance(irg);
 671                         be_verify_out_edges(irg);
 672                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 673                         assert(be_verify_out_edges(irg));
 674                         assert(be_check_dominance(irg) && "Dominance verification failed");
 675                 }
 676
 677                 BE_TIMER_PUSH(t_execfreq);
 678                 /**
 679                  * Create execution frequencies from profile data or estimate some
 680                  */
 681                 if (ir_profile_has_data())
 682                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
 683                 else {
 684                         /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
 685                          * optimize graph phase merges blocks in the x86 backend */
 686                         edges_deactivate(irg);
 687                         birg->exec_freq = compute_execfreq(irg, 10);
 688                 }
 689                 BE_TIMER_POP(t_execfreq);
 690
 691
 692                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
 693                 /* be_live_chk_compare(birg); */
 694
 695                 /* let backend prepare scheduling */
 696                 BE_TIMER_PUSH(t_codegen);
 697                 arch_code_generator_before_sched(birg->cg);
 698                 BE_TIMER_POP(t_codegen);
 699
 700                 /* schedule the irg */
 701                 BE_TIMER_PUSH(t_sched);
 702                 switch (be_options.scheduler) {
 703                         default:
 704                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
 705                         case BE_SCHED_LIST:
 706                                 list_sched(birg, &be_options);
 707                                 break;
 708 #ifdef WITH_ILP
 709                         case BE_SCHED_ILP:
 710                                 be_ilp_sched(birg, &be_options);
 711                                 break;
 712 #endif /* WITH_ILP */
 713                 };
 714                 BE_TIMER_POP(t_sched);
 715
 716                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 717
 718                 /* check schedule */
 719                 BE_TIMER_PUSH(t_verify);
 720                 be_sched_vrfy(birg, be_options.vrfy_option);
 721                 BE_TIMER_POP(t_verify);
 722
 723                 /* introduce patterns to assure constraints */
 724                 BE_TIMER_PUSH(t_constr);
 725                 /* we switch off optimizations here, because they might cause trouble */
 726                 save_optimization_state(&state);
 727                 set_optimize(0);
 728                 set_opt_normalize(0);
 729                 set_opt_cse(0);
 730
 731                 /* add Keeps for should_be_different constrained nodes  */
 732                 /* beware: needs schedule due to usage of be_ssa_constr */
 733                 assure_constraints(birg);
 734                 BE_TIMER_POP(t_constr);
 735
 736                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 737
 738                 /* stuff needs to be done after scheduling but before register allocation */
 739                 BE_TIMER_PUSH(t_codegen);
 740                 arch_code_generator_before_ra(birg->cg);
 741                 BE_TIMER_POP(t_codegen);
 742
 743                 /* connect all stack modifying nodes together (see beabi.c) */
 744                 BE_TIMER_PUSH(t_abi);
 745                 be_abi_fix_stack_nodes(birg->abi);
 746                 BE_TIMER_POP(t_abi);
 747
 748                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 749
 750                 /* check schedule */
 751                 BE_TIMER_PUSH(t_verify);
 752                 be_sched_vrfy(birg, be_options.vrfy_option);
 753                 BE_TIMER_POP(t_verify);
 754
 755                 stat_ev_if {
 756                         stat_ev_dbl("bemain_costs_before_ra",
 757                                         be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 758                         be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
 759                         be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
 760                 }
 761
 762                 /* Do register allocation */
 763                 be_allocate_registers(birg);
 764
 765 #ifdef FIRM_STATISTICS
 766                 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
 767 #endif
 768
 769                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 770
 771                 /* let the code generator prepare the graph for emitter */
 772                 BE_TIMER_PUSH(t_finish);
 773                 arch_code_generator_after_ra(birg->cg);
 774                 BE_TIMER_POP(t_finish);
 775
 776                 /* fix stack offsets */
 777                 BE_TIMER_PUSH(t_abi);
 778                 be_abi_fix_stack_nodes(birg->abi);
 779                 be_remove_dead_nodes_from_schedule(birg);
 780                 be_abi_fix_stack_bias(birg->abi);
 781                 BE_TIMER_POP(t_abi);
 782
 783                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
 784
 785                 BE_TIMER_PUSH(t_finish);
 786                 arch_code_generator_finish(birg->cg);
 787                 BE_TIMER_POP(t_finish);
 788
 789                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
 790
 791                 stat_ev_if {
 792                         be_stat_ev("bemain_insns_finish", be_count_insns(irg));
 793                         be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
 794                 }
 795
 796                 /* check schedule and register allocation */
 797                 BE_TIMER_PUSH(t_verify);
 798                 if (be_options.vrfy_option == BE_VRFY_WARN) {
 799                         irg_verify(irg, VRFY_ENFORCE_SSA);
 800                         be_check_dominance(irg);
 801                         be_verify_out_edges(irg);
 802                         be_verify_schedule(birg);
 803                         be_verify_register_allocation(birg);
 804                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
 805                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
 806                         assert(be_verify_out_edges(irg) && "out edge verification failed");
 807                         assert(be_check_dominance(irg) && "Dominance verification failed");
 808                         assert(be_verify_schedule(birg) && "Schedule verification failed");
 809                         assert(be_verify_register_allocation(birg)
 810                                && "register allocation verification failed");
 811
 812                 }
 813                 BE_TIMER_POP(t_verify);
 814
 815                 /* emit assembler code */
 816                 BE_TIMER_PUSH(t_emit);
 817                 arch_code_generator_done(birg->cg);
 818                 BE_TIMER_POP(t_emit);
 819
 820                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
 821
 822                 BE_TIMER_PUSH(t_abi);
 823                 be_abi_free(birg->abi);
 824                 BE_TIMER_POP(t_abi);
 825
 826                 restore_optimization_state(&state);
 827
 828                 BE_TIMER_POP(t_other);
 829
 830 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
 831
 832 #define LC_EMIT(timer)  \
 833                 stat_ev_if {    \
 834                         stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer));  \
 835                 } else { \
 836                         printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
 837                 } \
 838                 STOP_AND_RESET_TIMER(timer);
 839
 840                 BE_TIMER_ONLY(
 841                         stat_ev_if {
 842                         } else {
 843                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
 844                         }
 845                         LC_EMIT(t_abi);
 846                         LC_EMIT(t_codegen);
 847                         LC_EMIT(t_sched);
 848                         LC_EMIT(t_live);
 849                         LC_EMIT(t_heights);
 850                         LC_EMIT(t_ssa_constr);
 851                         LC_EMIT(t_constr);
 852                         LC_EMIT(t_execfreq);
 853                         LC_EMIT(t_ra_prolog);
 854                         LC_EMIT(t_ra_spill);
 855                         LC_EMIT(t_ra_spill_apply);
 856                         LC_EMIT(t_ra_constr);
 857                         LC_EMIT(t_ra_color);
 858                         LC_EMIT(t_ra_ifg);
 859                         LC_EMIT(t_ra_copymin);
 860                         LC_EMIT(t_ra_ssa);
 861                         LC_EMIT(t_ra_epilog);
 862                         LC_EMIT(t_ra_other);
 863                         LC_EMIT(t_finish);
 864                         LC_EMIT(t_emit);
 865                         LC_EMIT(t_verify);
 866                         LC_EMIT(t_other);
 867                 );
 868 #undef LC_EMIT
 869
 870                 be_sched_free_phase(irg);
 871
 872                 be_free_birg(birg);
 873                 stat_ev_ctx_pop("bemain_irg");
 874         }
 875         ir_profile_free();
 876         be_done_env(&env);
 877 }
 878
 879 /* Main interface to the frontend. */
 880 void be_main(FILE *file_handle, const char *cup_name)
 881 {
 882         ir_timer_t *t = NULL;
 883
 884         /* The user specified another config file to read. do that now. */
 885         if (config_file[0] != '\0') {
 886                 FILE *f;
 887
 888                 if ((f = fopen(config_file, "rt")) != NULL) {
 889                         lc_opt_from_file(config_file, f, NULL);
 890                         fclose(f);
 891                 }
 892         }
 893
 894         if (be_options.timing == BE_TIME_ON) {
 895                 t = ir_timer_register("bemain", "measure complete bemain loop");
 896
 897                 if (ir_timer_enter_high_priority()) {
 898                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
 899                 }
 900
 901                 ir_timer_reset_and_start(t);
 902         }
 903
 904 #ifdef FIRM_STATISTICS
 905         if (be_options.statev) {
 906                 const char *dot = strrchr(cup_name, '.');
 907                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
 908                 char       *buf = alloca(pos - cup_name + 1);
 909                 strncpy(buf, cup_name, pos - cup_name);
 910                 buf[pos - cup_name] = '\0';
 911
 912                 be_options.statev = 1;
 913                 stat_ev_begin(buf, be_options.filtev);
 914                 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
 915         }
 916 #endif
 917
 918         /* never build code for pseudo irgs */
 919         set_visit_pseudo_irgs(0);
 920
 921         be_node_init();
 922
 923         be_main_loop(file_handle, cup_name);
 924
 925         if (be_options.timing == BE_TIME_ON) {
 926                 ir_timer_stop(t);
 927                 ir_timer_leave_high_priority();
 928                 stat_ev_if {
 929                         stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
 930                 } else {
 931                         printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
 932                 }
 933         }
 934
 935 #ifdef FIRM_STATISTICS
 936         if (be_options.statev) {
 937                 stat_ev_ctx_pop("bemain_compilation_unit");
 938                 stat_ev_end();
 939         }
 940 #endif
 941 }
 942
 943 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
 944 {
 945         if (bs == NULL)
 946                 bs = bitset_alloca(cls->n_regs);
 947         else
 948                 bitset_clear_all(bs);
 949
 950         assert(bitset_size(bs) == (unsigned)cls->n_regs);
 951         arch_put_non_ignore_regs(cls, bs);
 952         bitset_flip_all(bs);
 953         be_abi_put_ignore_regs(birg->abi, cls, bs);
 954
 955         return bitset_popcnt(bs);
 956 }