2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
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.
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.
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
22 * @brief Main Backend driver.
23 * @author Sebastian Hack
35 #include "lc_opts_enum.h"
46 #include "iredges_t.h"
51 #include "iroptimize.h"
54 #include "irprofile.h"
62 #include "besched_t.h"
63 #include "belistsched.h"
66 #include "bechordal_t.h"
68 #include "beifg_impl.h"
69 #include "becopyopt.h"
70 #include "becopystat.h"
71 #include "bessadestr.h"
74 #include "beschedmris.h"
77 #include "be_dbgout.h"
80 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
83 #include "beilpsched.h"
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 */
105 static char config_file[256] = { 0 };
107 /* back end instruction set architecture to use */
108 static const arch_isa_if_t *isa_if = NULL;
110 /* possible dumping options */
111 static const lc_opt_enum_mask_items_t dump_items[] = {
112 { "none", DUMP_NONE },
113 { "initial", DUMP_INITIAL },
115 { "sched", DUMP_SCHED },
116 { "prepared", DUMP_PREPARED },
117 { "regalloc", DUMP_RA },
118 { "final", DUMP_FINAL },
120 { "all", 2 * DUMP_BE - 1 },
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 },
132 /* scheduling options. */
133 static const lc_opt_enum_int_items_t sched_items[] = {
134 { "list", BE_SCHED_LIST },
136 { "ilp", BE_SCHED_ILP },
137 #endif /* WITH_ILP */
141 static lc_opt_enum_mask_var_t dump_var = {
142 &be_options.dump_flags, dump_items
145 static lc_opt_enum_int_var_t vrfy_var = {
146 &be_options.vrfy_option, vrfy_items
149 static lc_opt_enum_int_var_t sched_var = {
150 &be_options.scheduler, sched_items
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)),
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 */
177 static be_module_list_entry_t *isa_ifs = NULL;
179 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
184 be_add_module_to_list(&isa_ifs, name, (void*) isa);
187 void be_opt_register(void)
189 lc_opt_entry_t *be_grp;
190 static int run_once = 0;
199 be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
200 lc_opt_add_table(be_grp, be_main_options);
202 be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
203 &isa_ifs, (void**) &isa_if);
206 /* Parse one argument. */
207 int be_parse_arg(const char *arg) {
208 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
209 if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
210 lc_opt_print_help(be_grp, stdout);
213 return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
216 /** The be parameters returned by default, all off. */
217 static const backend_params be_params = {
218 0, /* need dword lowering */
219 0, /* don't support inline assembler yet */
220 0, /* no immediate floating point mode. */
221 NULL, /* no additional opcodes */
222 NULL, /* will be set later */
223 NULL, /* but yet no creator function */
224 NULL, /* context for create_intrinsic_fkt */
225 NULL, /* no if conversion settings */
226 NULL /* no immediate fp mode */
229 /* Perform schedule verification if requested. */
230 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
231 if (vrfy_opt == BE_VRFY_WARN) {
232 be_verify_schedule(birg);
233 } else if (vrfy_opt == BE_VRFY_ASSERT) {
234 assert(be_verify_schedule(birg) && "Schedule verification failed.");
238 /* Initialize the Firm backend. Must be run first in init_firm()! */
239 void firm_be_init(void)
245 /* Returns the backend parameter */
246 const backend_params *be_get_backend_param(void)
248 if (isa_if->get_params)
249 return isa_if->get_params();
254 * Initializes the main environment for the backend.
256 * @param env an empty environment
257 * @param file_handle the file handle where the output will be written to
259 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
261 memset(env, 0, sizeof(*env));
262 env->options = &be_options;
263 env->ent_trampoline_map = pmap_create();
264 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
265 env->ent_pic_symbol_map = pmap_create();
266 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
268 remove_irp_type(env->pic_trampolines_type);
269 remove_irp_type(env->pic_symbols_type);
270 set_class_final(env->pic_trampolines_type, 1);
272 env->arch_env = arch_env_init(isa_if, file_handle, env);
274 be_phi_handler_new(env);
281 * Called when the be_main_env_t can be destroyed.
283 static void be_done_env(be_main_env_t *env)
285 arch_env_done(env->arch_env);
287 be_phi_handler_free();
289 pmap_destroy(env->ent_trampoline_map);
290 pmap_destroy(env->ent_pic_symbol_map);
291 free_type(env->pic_trampolines_type);
292 free_type(env->pic_symbols_type);
296 * A wrapper around a firm dumper. Dumps only, if
299 * @param mask a bitmask containing the reason what will be dumped
300 * @param irg the IR graph to dump
301 * @param suffix the suffix for the dumper
302 * @param dumper the dumper to be called
304 static void dump(int mask, ir_graph *irg, const char *suffix,
305 void (*dumper)(ir_graph *, const char *))
307 if(be_options.dump_flags & mask)
308 be_dump(irg, suffix, dumper);
312 * Prepare a backend graph for code generation and initialize its birg
314 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
316 memset(birg, 0, sizeof(*birg));
318 birg->main_env = env;
320 edges_deactivate_kind(irg, EDGE_KIND_DEP);
321 edges_activate_kind(irg, EDGE_KIND_DEP);
323 dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
325 be_stat_init_irg(env->arch_env, irg);
326 be_do_stat_nodes(irg, "01 Begin");
328 /* set the current graph (this is important for several firm functions) */
329 current_ir_graph = irg;
331 /* Normalize proj nodes. */
332 normalize_proj_nodes(irg);
334 /* we do this before critical edge split. As this produces less returns,
335 because sometimes (= 164.gzip) multiple returns are slower */
336 normalize_n_returns(irg);
338 /* Remove critical edges */
339 remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
341 /* Ensure, that the ir_edges are computed. */
344 set_irg_phase_state(irg, phase_backend);
346 dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
349 #define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while(0)
353 ir_timer_t *t_codegen;
355 ir_timer_t *t_constr;
356 ir_timer_t *t_finish;
359 ir_timer_t *t_verify;
360 ir_timer_t *t_heights;
362 ir_timer_t *t_execfreq;
363 ir_timer_t *t_ssa_constr;
364 ir_timer_t *t_ra_constr;
365 ir_timer_t *t_ra_prolog;
366 ir_timer_t *t_ra_epilog;
367 ir_timer_t *t_ra_spill;
368 ir_timer_t *t_ra_spill_apply;
369 ir_timer_t *t_ra_color;
370 ir_timer_t *t_ra_ifg;
371 ir_timer_t *t_ra_copymin;
372 ir_timer_t *t_ra_ssa;
373 ir_timer_t *t_ra_other;
376 * The Firm backend main loop.
377 * Do architecture specific lowering for all graphs
378 * and call the architecture specific code generator.
380 * @param file_handle the file handle the output will be written to
381 * @param cup_name name of the compilation unit
383 static void be_main_loop(FILE *file_handle, const char *cup_name)
387 char prof_filename[256];
388 static const char suffix[] = ".prof";
391 ir_graph **irg_list, **backend_irg_list;
392 arch_env_t *arch_env;
394 be_timing = (be_options.timing == BE_TIME_ON);
397 t_abi = ir_timer_register("time_beabi", "be abi introduction");
398 t_codegen = ir_timer_register("time_codegen", "codegeneration");
399 t_sched = ir_timer_register("time_sched", "scheduling");
400 t_constr = ir_timer_register("time_constr", "assure constraints");
401 t_finish = ir_timer_register("time_finish", "graph finish");
402 t_emit = ir_timer_register("time_emiter", "code emiter");
403 t_verify = ir_timer_register("time_verify", "graph verification");
404 t_other = ir_timer_register("time_other", "other");
405 t_heights = ir_timer_register("time_heights", "heights");
406 t_live = ir_timer_register("time_liveness", "be liveness");
407 t_execfreq = ir_timer_register("time_execfreq", "execfreq");
408 t_ssa_constr = ir_timer_register("time_ssa_constr", "ssa reconstruction");
409 t_ra_prolog = ir_timer_register("time_ra_prolog", "regalloc prolog");
410 t_ra_epilog = ir_timer_register("time_ra_epilog", "regalloc epilog");
411 t_ra_constr = ir_timer_register("time_ra_constr", "regalloc constraints");
412 t_ra_spill = ir_timer_register("time_ra_spill", "spiller");
414 = ir_timer_register("time_ra_spill_apply", "apply spills");
415 t_ra_color = ir_timer_register("time_ra_color", "graph coloring");
416 t_ra_ifg = ir_timer_register("time_ra_ifg", "interference graph");
417 t_ra_copymin = ir_timer_register("time_ra_copymin", "copy minimization");
418 t_ra_ssa = ir_timer_register("time_ra_ssadestr", "ssa destruction");
419 t_ra_other = ir_timer_register("time_ra_other", "regalloc other");
422 be_init_env(&env, file_handle);
423 env.cup_name = cup_name;
428 arch_env = env.arch_env;
430 /* backend may provide an ordered list of irgs where code should be generated for */
431 irg_list = NEW_ARR_F(ir_graph *, 0);
432 backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
434 /* we might need 1 birg more for instrumentation constructor */
435 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
436 birgs = alloca(sizeof(birgs[0]) * (num_birgs + 1));
438 /* First: initialize all birgs */
439 for(i = 0; i < num_birgs; ++i) {
440 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
441 initialize_birg(&birgs[i], irg, &env);
446 Get the filename for the profiling data.
447 Beware: '\0' is already included in sizeof(suffix)
449 memset(prof_filename, 0, sizeof(prof_filename));
450 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
451 strcat(prof_filename, suffix);
454 Next: Either instruments all irgs with profiling code
455 or try to read in profile data for current translation unit.
457 if (be_options.opt_profile) {
458 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
459 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
462 ir_profile_read(prof_filename);
466 for (i = 0; i < num_birgs; ++i) {
467 be_irg_t *birg = &birgs[i];
468 ir_graph *irg = birg->irg;
469 optimization_state_t state;
470 const arch_code_generator_if_t *cg_if;
472 /* set the current graph (this is important for several firm functions) */
473 current_ir_graph = irg;
477 unsigned percent = 100*i/num_birgs;
478 ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
481 be_sched_init_phase(irg);
483 /* reset the phi handler. */
484 be_phi_handler_reset();
486 stat_ev_ctx_push_fobj("bemain_irg", irg);
488 /* stop and reset timers */
489 BE_TIMER_PUSH(t_other); /* t_other */
491 /* Verify the initial graph */
492 BE_TIMER_PUSH(t_verify);
493 if (be_options.vrfy_option == BE_VRFY_WARN) {
494 irg_verify(irg, VRFY_ENFORCE_SSA);
495 be_check_dominance(irg);
496 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
497 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
498 assert(be_check_dominance(irg) && "Dominance verification failed");
500 BE_TIMER_POP(t_verify);
502 /* Get the code generator interface. */
503 cg_if = arch_env_get_code_generator_if(arch_env);
505 /* get a code generator for this graph. */
506 birg->cg = cg_if->init(birg);
508 /* some transformations need to be done before abi introduce */
509 arch_code_generator_before_abi(birg->cg);
511 /* implement the ABI conventions. */
512 BE_TIMER_PUSH(t_abi);
513 birg->abi = be_abi_introduce(birg);
516 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
517 be_do_stat_nodes(irg, "02 Abi");
519 if (be_options.vrfy_option == BE_VRFY_WARN) {
520 be_check_dominance(irg);
521 be_verify_out_edges(irg);
522 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
523 assert(be_verify_out_edges(irg));
524 assert(be_check_dominance(irg) && "Dominance verification failed");
528 stat_ev_ctx_push_str("bemain_phase", "prepare");
529 BE_TIMER_PUSH(t_codegen);
530 arch_code_generator_prepare_graph(birg->cg);
531 BE_TIMER_POP(t_codegen);
532 stat_ev_ctx_pop("bemain_phase");
534 /* reset the phi handler. */
535 be_phi_handler_reset();
537 be_do_stat_nodes(irg, "03 Prepare");
539 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
541 if (be_options.vrfy_option == BE_VRFY_WARN) {
542 be_check_dominance(irg);
543 be_verify_out_edges(irg);
544 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
545 assert(be_verify_out_edges(irg));
546 assert(be_check_dominance(irg) && "Dominance verification failed");
549 BE_TIMER_PUSH(t_execfreq);
551 * Create execution frequencies from profile data or estimate some
553 if (ir_profile_has_data())
554 birg->exec_freq = ir_create_execfreqs_from_profile(irg);
556 birg->exec_freq = compute_execfreq(irg, 10);
557 BE_TIMER_POP(t_execfreq);
560 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
561 /* be_live_chk_compare(birg); */
563 /* let backend prepare scheduling */
564 stat_ev_ctx_push_str("bemain_phase", "before_sched");
565 BE_TIMER_PUSH(t_codegen);
566 arch_code_generator_before_sched(birg->cg);
567 BE_TIMER_POP(t_codegen);
568 stat_ev_ctx_pop("bemain_phase");
570 /* schedule the irg */
571 BE_TIMER_PUSH(t_sched);
572 switch (be_options.scheduler) {
574 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
576 list_sched(birg, &be_options);
580 be_ilp_sched(birg, &be_options);
582 #endif /* WITH_ILP */
584 BE_TIMER_POP(t_sched);
586 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
589 BE_TIMER_PUSH(t_verify);
590 be_sched_vrfy(birg, be_options.vrfy_option);
591 BE_TIMER_POP(t_verify);
593 be_do_stat_nodes(irg, "04 Schedule");
595 /* introduce patterns to assure constraints */
596 BE_TIMER_PUSH(t_constr);
597 /* we switch off optimizations here, because they might cause trouble */
598 save_optimization_state(&state);
600 set_opt_normalize(0);
603 assert(!get_opt_cse());
605 /* add Keeps for should_be_different constrained nodes */
606 /* beware: needs schedule due to usage of be_ssa_constr */
607 assure_constraints(birg);
608 BE_TIMER_POP(t_constr);
610 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
611 be_do_stat_nodes(irg, "05 Constraints");
613 /* stuff needs to be done after scheduling but before register allocation */
614 BE_TIMER_PUSH(t_codegen);
615 arch_code_generator_before_ra(birg->cg);
616 BE_TIMER_POP(t_codegen);
618 /* connect all stack modifying nodes together (see beabi.c) */
619 BE_TIMER_PUSH(t_abi);
620 be_abi_fix_stack_nodes(birg->abi);
623 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
626 BE_TIMER_PUSH(t_verify);
627 be_sched_vrfy(birg, be_options.vrfy_option);
628 BE_TIMER_POP(t_verify);
630 /* do some statistics */
631 //be_do_stat_reg_pressure(birg);
633 #ifdef FIRM_STATISTICS
634 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
637 /* Do register allocation */
638 be_allocate_registers(birg);
640 #ifdef FIRM_STATISTICS
641 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
644 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
645 be_do_stat_nodes(irg, "06 Register Allocation");
647 /* let the code generator prepare the graph for emitter */
648 BE_TIMER_PUSH(t_finish);
649 arch_code_generator_after_ra(birg->cg);
650 BE_TIMER_POP(t_finish);
652 /* fix stack offsets */
653 BE_TIMER_PUSH(t_abi);
654 be_abi_fix_stack_nodes(birg->abi);
655 be_remove_dead_nodes_from_schedule(birg);
656 be_abi_fix_stack_bias(birg->abi);
659 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
661 BE_TIMER_PUSH(t_finish);
662 arch_code_generator_finish(birg->cg);
663 BE_TIMER_POP(t_finish);
665 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
667 /* check schedule and register allocation */
668 BE_TIMER_PUSH(t_verify);
669 if (be_options.vrfy_option == BE_VRFY_WARN) {
670 irg_verify(irg, VRFY_ENFORCE_SSA);
671 be_check_dominance(irg);
672 be_verify_out_edges(irg);
673 be_verify_schedule(birg);
674 be_verify_register_allocation(birg);
675 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
676 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
677 assert(be_verify_out_edges(irg) && "out edge verification failed");
678 assert(be_check_dominance(irg) && "Dominance verification failed");
679 assert(be_verify_schedule(birg) && "Schedule verification failed");
680 assert(be_verify_register_allocation(birg)
681 && "register allocation verification failed");
684 BE_TIMER_POP(t_verify);
686 /* emit assembler code */
687 BE_TIMER_PUSH(t_emit);
688 arch_code_generator_done(birg->cg);
689 BE_TIMER_POP(t_emit);
691 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
693 BE_TIMER_PUSH(t_abi);
694 be_abi_free(birg->abi);
697 be_do_stat_nodes(irg, "07 Final");
698 restore_optimization_state(&state);
700 BE_TIMER_POP(t_other);
702 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
704 #define LC_EMIT(timer) \
706 stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer)); \
708 printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
710 STOP_AND_RESET_TIMER(timer);
715 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
722 LC_EMIT(t_ssa_constr);
725 LC_EMIT(t_ra_prolog);
727 LC_EMIT(t_ra_spill_apply);
728 LC_EMIT(t_ra_constr);
731 LC_EMIT(t_ra_copymin);
733 LC_EMIT(t_ra_epilog);
742 be_sched_free_phase(irg);
746 /* switched off due to statistics (statistic module needs all irgs) */
747 #if 0 /* STA needs irgs */
748 #ifdef FIRM_STATISTICS
749 if (! stat_is_active())
750 #endif /* FIRM_STATISTICS */
753 stat_ev_ctx_pop("bemain_irg");
759 /* Main interface to the frontend. */
760 void be_main(FILE *file_handle, const char *cup_name)
762 ir_timer_t *t = NULL;
764 /* The user specified another config file to read. do that now. */
765 if(strlen(config_file) > 0) {
768 if((f = fopen(config_file, "rt")) != NULL) {
769 lc_opt_from_file(config_file, f, NULL);
774 if (be_options.timing == BE_TIME_ON) {
775 t = ir_timer_register("bemain", "measure complete bemain loop");
777 if (ir_timer_enter_high_priority()) {
778 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
781 ir_timer_reset_and_start(t);
784 #ifdef FIRM_STATISTICS
785 if (be_options.statev) {
786 const char *dot = strrchr(cup_name, '.');
787 const char *pos = dot ? dot : cup_name + strlen(cup_name);
788 char *buf = alloca(pos - cup_name + 1);
789 strncpy(buf, cup_name, pos - cup_name);
790 buf[pos - cup_name] = '\0';
792 be_options.statev = 1;
793 stat_ev_begin(buf, be_options.filtev);
797 /* never build code for pseudo irgs */
798 set_visit_pseudo_irgs(0);
802 be_main_loop(file_handle, cup_name);
804 if (be_options.timing == BE_TIME_ON) {
806 ir_timer_leave_high_priority();
808 stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
810 printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
814 #ifdef FIRM_STATISTICS
815 if (be_options.statev)
820 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
823 bs = bitset_alloca(cls->n_regs);
825 bitset_clear_all(bs);
827 assert(bitset_size(bs) == (unsigned)cls->n_regs);
828 arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
830 be_abi_put_ignore_regs(birg->abi, cls, bs);
832 return bitset_popcnt(bs);