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, /* create PIC code */
93 0, /* create gprof compatible profiling code */
94 BE_VRFY_WARN, /* verification level: warn */
95 BE_SCHED_LIST, /* scheduler: list scheduler */
96 "linux", /* target OS name */
97 "i44pc52.info.uni-karlsruhe.de", /* ilp server */
98 "cplex", /* ilp solver */
99 0, /* enable statistic event dumping */
100 "", /* print stat events */
104 static char config_file[256] = { 0 };
106 /* back end instruction set architecture to use */
107 static const arch_isa_if_t *isa_if = NULL;
109 /* possible dumping options */
110 static const lc_opt_enum_mask_items_t dump_items[] = {
111 { "none", DUMP_NONE },
112 { "initial", DUMP_INITIAL },
114 { "sched", DUMP_SCHED },
115 { "prepared", DUMP_PREPARED },
116 { "regalloc", DUMP_RA },
117 { "final", DUMP_FINAL },
119 { "all", 2 * DUMP_BE - 1 },
123 /* verify options. */
124 static const lc_opt_enum_int_items_t vrfy_items[] = {
125 { "off", BE_VRFY_OFF },
126 { "warn", BE_VRFY_WARN },
127 { "assert", BE_VRFY_ASSERT },
131 /* scheduling options. */
132 static const lc_opt_enum_int_items_t sched_items[] = {
133 { "list", BE_SCHED_LIST },
135 { "ilp", BE_SCHED_ILP },
136 #endif /* WITH_ILP */
140 static lc_opt_enum_mask_var_t dump_var = {
141 &be_options.dump_flags, dump_items
144 static lc_opt_enum_int_var_t vrfy_var = {
145 &be_options.vrfy_option, vrfy_items
148 static lc_opt_enum_int_var_t sched_var = {
149 &be_options.scheduler, sched_items
152 static const lc_opt_table_entry_t be_main_options[] = {
153 LC_OPT_ENT_STR ("config", "read another config file containing backend options", config_file, sizeof(config_file)),
154 LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var),
155 LC_OPT_ENT_BOOL ("omitfp", "omit frame pointer", &be_options.omit_fp),
156 LC_OPT_ENT_BOOL ("pic", "create PIC code", &be_options.pic),
157 LC_OPT_ENT_BOOL ("gprof", "create gprof profiling code", &be_options.gprof),
158 LC_OPT_ENT_ENUM_PTR ("vrfy", "verify the backend irg", &vrfy_var),
159 LC_OPT_ENT_BOOL ("time", "get backend timing statistics", &be_options.timing),
160 LC_OPT_ENT_BOOL ("profile", "instrument the code for execution count profiling", &be_options.opt_profile),
161 LC_OPT_ENT_ENUM_PTR ("sched", "select a scheduler", &sched_var),
162 LC_OPT_ENT_STR ("os", "specify target operating system", &be_options.target_os, sizeof(be_options.target_os)),
163 #ifdef FIRM_STATISTICS
164 LC_OPT_ENT_BOOL ("statev", "dump statistic events", &be_options.statev),
165 LC_OPT_ENT_STR ("filtev", "filter for stat events (regex if support is active", &be_options.filtev, sizeof(be_options.filtev)),
169 LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
170 LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
171 #endif /* WITH_ILP */
175 static be_module_list_entry_t *isa_ifs = NULL;
177 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
182 be_add_module_to_list(&isa_ifs, name, (void*) isa);
185 void be_opt_register(void)
187 lc_opt_entry_t *be_grp;
188 static int run_once = 0;
197 be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
198 lc_opt_add_table(be_grp, be_main_options);
200 be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
201 &isa_ifs, (void**) &isa_if);
204 /* Parse one argument. */
205 int be_parse_arg(const char *arg) {
206 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
207 if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
208 lc_opt_print_help(be_grp, stdout);
211 return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
214 /** The be parameters returned by default, all off. */
215 static const backend_params be_params = {
216 0, /* need dword lowering */
217 0, /* don't support inlien assembler yet */
218 NULL, /* no additional opcodes */
219 NULL, /* will be set later */
220 NULL, /* but yet no creator function */
221 NULL, /* context for create_intrinsic_fkt */
222 NULL, /* no if conversion settings */
225 /* Perform schedule verification if requested. */
226 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
227 if (vrfy_opt == BE_VRFY_WARN) {
228 be_verify_schedule(birg);
229 } else if (vrfy_opt == BE_VRFY_ASSERT) {
230 assert(be_verify_schedule(birg) && "Schedule verification failed.");
234 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
235 const backend_params *be_init(void)
240 if (isa_if->get_params)
241 return isa_if->get_params();
246 * Initializes the main environment for the backend.
248 * @param env an empty environment
249 * @param file_handle the file handle where the output will be written to
251 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
253 arch_get_irn_ops_t *handler;
255 memset(env, 0, sizeof(*env));
256 env->options = &be_options;
257 env->ent_trampoline_map = pmap_create();
258 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
259 env->ent_pic_symbol_map = pmap_create();
260 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
262 remove_irp_type(env->pic_trampolines_type);
263 remove_irp_type(env->pic_symbols_type);
264 set_class_final(env->pic_trampolines_type, 1);
266 arch_env_init(&env->arch_env, isa_if, file_handle, env);
268 /* Register the irn handler of the architecture */
269 handler = arch_isa_get_irn_handler(env->arch_env.isa);
271 arch_env_push_irn_handler(&env->arch_env, handler);
274 * Register the node handler of the back end infrastructure.
275 * This irn handler takes care of the platform independent
276 * spill, reload and perm nodes.
278 arch_env_push_irn_handler(&env->arch_env, be_node_get_irn_ops);
279 be_phi_handler_new(env);
280 arch_env_push_irn_handler(&env->arch_env, env->phi_handler.get_irn_ops);
287 * Called when the be_main_env_t can be destroyed.
289 static void be_done_env(be_main_env_t *env)
291 env->arch_env.isa->impl->done(env->arch_env.isa);
293 be_phi_handler_free(env);
295 pmap_destroy(env->ent_trampoline_map);
296 pmap_destroy(env->ent_pic_symbol_map);
297 free_type(env->pic_trampolines_type);
298 free_type(env->pic_symbols_type);
302 * A wrapper around a firm dumper. Dumps only, if
305 * @param mask a bitmask containing the reason what will be dumped
306 * @param irg the IR graph to dump
307 * @param suffix the suffix for the dumper
308 * @param dumper the dumper to be called
310 static void dump(int mask, ir_graph *irg, const char *suffix,
311 void (*dumper)(ir_graph *, const char *))
313 if(be_options.dump_flags & mask)
314 be_dump(irg, suffix, dumper);
318 * Prepare a backend graph for code generation and initialize its birg
320 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
322 memset(birg, 0, sizeof(*birg));
324 birg->main_env = env;
326 edges_deactivate_kind(irg, EDGE_KIND_DEP);
327 edges_activate_kind(irg, EDGE_KIND_DEP);
329 dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
331 be_stat_init_irg(&env->arch_env, irg);
332 be_do_stat_nodes(irg, "01 Begin");
334 /* set the current graph (this is important for several firm functions) */
335 current_ir_graph = irg;
337 /* Normalize proj nodes. */
338 normalize_proj_nodes(irg);
340 /* we do this before critical edge split. As this produces less returns,
341 because sometimes (= 164.gzip) multiple returns are slower */
342 normalize_n_returns(irg);
344 /* Remove critical edges */
345 remove_critical_cf_edges(irg);
347 /* Ensure, that the ir_edges are computed. */
350 set_irg_phase_state(irg, phase_backend);
352 dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
355 #define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while(0)
359 ir_timer_t *t_codegen;
361 ir_timer_t *t_constr;
362 ir_timer_t *t_finish;
365 ir_timer_t *t_verify;
366 ir_timer_t *t_heights;
368 ir_timer_t *t_execfreq;
369 ir_timer_t *t_ssa_constr;
370 ir_timer_t *t_ra_constr;
371 ir_timer_t *t_ra_prolog;
372 ir_timer_t *t_ra_epilog;
373 ir_timer_t *t_ra_spill;
374 ir_timer_t *t_ra_spill_apply;
375 ir_timer_t *t_ra_color;
376 ir_timer_t *t_ra_ifg;
377 ir_timer_t *t_ra_copymin;
378 ir_timer_t *t_ra_ssa;
379 ir_timer_t *t_ra_other;
382 * The Firm backend main loop.
383 * Do architecture specific lowering for all graphs
384 * and call the architecture specific code generator.
386 * @param file_handle the file handle the output will be written to
387 * @param cup_name name of the compilation unit
389 static void be_main_loop(FILE *file_handle, const char *cup_name)
394 char prof_filename[256];
395 static const char suffix[] = ".prof";
398 ir_graph **irg_list, **backend_irg_list;
400 be_timing = (be_options.timing == BE_TIME_ON);
403 t_abi = ir_timer_register("time_beabi", "be abi introduction");
404 t_codegen = ir_timer_register("time_codegen", "codegeneration");
405 t_sched = ir_timer_register("time_sched", "scheduling");
406 t_constr = ir_timer_register("time_constr", "assure constraints");
407 t_finish = ir_timer_register("time_finish", "graph finish");
408 t_emit = ir_timer_register("time_emiter", "code emiter");
409 t_verify = ir_timer_register("time_verify", "graph verification");
410 t_other = ir_timer_register("time_other", "other");
411 t_heights = ir_timer_register("time_heights", "heights");
412 t_live = ir_timer_register("time_liveness", "be liveness");
413 t_execfreq = ir_timer_register("time_execfreq", "execfreq");
414 t_ssa_constr = ir_timer_register("time_ssa_constr", "ssa reconstruction");
415 t_ra_prolog = ir_timer_register("time_ra_prolog", "regalloc prolog");
416 t_ra_epilog = ir_timer_register("time_ra_epilog", "regalloc epilog");
417 t_ra_constr = ir_timer_register("time_ra_constr", "regalloc constraints");
418 t_ra_spill = ir_timer_register("time_ra_spill", "spiller");
420 = ir_timer_register("time_ra_spill_apply", "apply spills");
421 t_ra_color = ir_timer_register("time_ra_color", "graph coloring");
422 t_ra_ifg = ir_timer_register("time_ra_ifg", "interference graph");
423 t_ra_copymin = ir_timer_register("time_ra_copymin", "copy minimization");
424 t_ra_ssa = ir_timer_register("time_ra_ssadestr", "ssa destruction");
425 t_ra_other = ir_timer_register("time_ra_other", "regalloc other");
428 be_init_env(&env, file_handle);
429 env.cup_name = cup_name;
431 isa = arch_env_get_isa(&env.arch_env);
436 /* backend may provide an ordered list of irgs where code should be generated for */
437 irg_list = NEW_ARR_F(ir_graph *, 0);
438 backend_irg_list = arch_isa_get_backend_irg_list(isa, &irg_list);
440 /* we might need 1 birg more for instrumentation constructor */
441 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
442 birgs = alloca(sizeof(birgs[0]) * (num_birgs + 1));
444 /* First: initialize all birgs */
445 for(i = 0; i < num_birgs; ++i) {
446 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
447 initialize_birg(&birgs[i], irg, &env);
452 Get the filename for the profiling data.
453 Beware: '\0' is already included in sizeof(suffix)
455 memset(prof_filename, 0, sizeof(prof_filename));
456 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
457 strcat(prof_filename, suffix);
460 Next: Either instruments all irgs with profiling code
461 or try to read in profile data for current translation unit.
463 if (be_options.opt_profile) {
464 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
465 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
468 ir_profile_read(prof_filename);
472 for (i = 0; i < num_birgs; ++i) {
473 be_irg_t *birg = &birgs[i];
474 ir_graph *irg = birg->irg;
475 optimization_state_t state;
476 const arch_code_generator_if_t *cg_if;
478 /* set the current graph (this is important for several firm functions) */
479 current_ir_graph = irg;
483 unsigned percent = 100*i/num_birgs;
484 ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
487 be_sched_init_phase(irg);
489 /* reset the phi handler. */
490 be_phi_handler_reset(&env);
492 stat_ev_ctx_push_fobj("bemain_irg", irg);
494 /* stop and reset timers */
495 BE_TIMER_PUSH(t_other); /* t_other */
497 /* Verify the initial graph */
498 BE_TIMER_PUSH(t_verify);
499 if (be_options.vrfy_option == BE_VRFY_WARN) {
500 irg_verify(irg, VRFY_ENFORCE_SSA);
501 be_check_dominance(irg);
502 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
503 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
504 assert(be_check_dominance(irg) && "Dominance verification failed");
506 BE_TIMER_POP(t_verify);
508 /* Get the code generator interface. */
509 cg_if = isa->impl->get_code_generator_if(isa);
511 /* get a code generator for this graph. */
512 birg->cg = cg_if->init(birg);
514 /* some transformations need to be done before abi introduce */
515 arch_code_generator_before_abi(birg->cg);
517 /* implement the ABI conventions. */
518 BE_TIMER_PUSH(t_abi);
519 birg->abi = be_abi_introduce(birg);
522 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
523 be_do_stat_nodes(irg, "02 Abi");
525 if (be_options.vrfy_option == BE_VRFY_WARN) {
526 be_check_dominance(irg);
527 be_verify_out_edges(irg);
528 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
529 assert(be_verify_out_edges(irg));
530 assert(be_check_dominance(irg) && "Dominance verification failed");
534 stat_ev_ctx_push_str("bemain_phase", "prepare");
535 BE_TIMER_PUSH(t_codegen);
536 arch_code_generator_prepare_graph(birg->cg);
537 BE_TIMER_POP(t_codegen);
538 stat_ev_ctx_pop("bemain_phase");
540 /* reset the phi handler. */
541 be_phi_handler_reset(&env);
543 be_do_stat_nodes(irg, "03 Prepare");
545 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
547 if (be_options.vrfy_option == BE_VRFY_WARN) {
548 be_check_dominance(irg);
549 be_verify_out_edges(irg);
550 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
551 assert(be_verify_out_edges(irg));
552 assert(be_check_dominance(irg) && "Dominance verification failed");
555 BE_TIMER_PUSH(t_execfreq);
557 * Create execution frequencies from profile data or estimate some
559 if (ir_profile_has_data())
560 birg->exec_freq = ir_create_execfreqs_from_profile(irg);
562 birg->exec_freq = compute_execfreq(irg, 10);
563 BE_TIMER_POP(t_execfreq);
566 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
567 /* be_live_chk_compare(birg); */
569 /* let backend prepare scheduling */
570 stat_ev_ctx_push_str("bemain_phase", "before_sched");
571 BE_TIMER_PUSH(t_codegen);
572 arch_code_generator_before_sched(birg->cg);
573 BE_TIMER_POP(t_codegen);
574 stat_ev_ctx_pop("bemain_phase");
576 /* schedule the irg */
577 BE_TIMER_PUSH(t_sched);
578 switch (be_options.scheduler) {
580 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
582 list_sched(birg, &be_options);
586 be_ilp_sched(birg, &be_options);
588 #endif /* WITH_ILP */
590 BE_TIMER_POP(t_sched);
592 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
595 BE_TIMER_PUSH(t_verify);
596 be_sched_vrfy(birg, be_options.vrfy_option);
597 BE_TIMER_POP(t_verify);
599 be_do_stat_nodes(irg, "04 Schedule");
601 /* introduce patterns to assure constraints */
602 BE_TIMER_PUSH(t_constr);
603 /* we switch off optimizations here, because they might cause trouble */
604 save_optimization_state(&state);
606 set_opt_normalize(0);
609 assert(!get_opt_cse());
611 /* add Keeps for should_be_different constrained nodes */
612 /* beware: needs schedule due to usage of be_ssa_constr */
613 assure_constraints(birg);
614 BE_TIMER_POP(t_constr);
616 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
617 be_do_stat_nodes(irg, "05 Constraints");
619 /* stuff needs to be done after scheduling but before register allocation */
620 BE_TIMER_PUSH(t_codegen);
621 arch_code_generator_before_ra(birg->cg);
622 BE_TIMER_POP(t_codegen);
624 /* connect all stack modifying nodes together (see beabi.c) */
625 BE_TIMER_PUSH(t_abi);
626 be_abi_fix_stack_nodes(birg->abi);
629 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
632 BE_TIMER_PUSH(t_verify);
633 be_sched_vrfy(birg, be_options.vrfy_option);
634 BE_TIMER_POP(t_verify);
636 /* do some statistics */
637 //be_do_stat_reg_pressure(birg);
639 #ifdef FIRM_STATISTICS
640 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, &env.arch_env, birg->exec_freq));
643 /* Do register allocation */
644 be_allocate_registers(birg);
646 #ifdef FIRM_STATISTICS
647 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, &env.arch_env, birg->exec_freq));
650 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
651 be_do_stat_nodes(irg, "06 Register Allocation");
653 /* let the code generator prepare the graph for emitter */
654 BE_TIMER_PUSH(t_finish);
655 arch_code_generator_after_ra(birg->cg);
656 BE_TIMER_POP(t_finish);
658 /* fix stack offsets */
659 BE_TIMER_PUSH(t_abi);
660 be_abi_fix_stack_nodes(birg->abi);
661 be_remove_dead_nodes_from_schedule(birg);
662 be_abi_fix_stack_bias(birg->abi);
665 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
667 BE_TIMER_PUSH(t_finish);
668 arch_code_generator_finish(birg->cg);
669 BE_TIMER_POP(t_finish);
671 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
673 /* check schedule and register allocation */
674 BE_TIMER_PUSH(t_verify);
675 if (be_options.vrfy_option == BE_VRFY_WARN) {
676 irg_verify(irg, VRFY_ENFORCE_SSA);
677 be_check_dominance(irg);
678 be_verify_out_edges(irg);
679 be_verify_schedule(birg);
680 be_verify_register_allocation(birg);
681 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
682 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
683 assert(be_verify_out_edges(irg) && "out edge verification failed");
684 assert(be_check_dominance(irg) && "Dominance verification failed");
685 assert(be_verify_schedule(birg) && "Schedule verification failed");
686 assert(be_verify_register_allocation(birg)
687 && "register allocation verification failed");
690 BE_TIMER_POP(t_verify);
692 /* emit assembler code */
693 BE_TIMER_PUSH(t_emit);
694 arch_code_generator_done(birg->cg);
695 BE_TIMER_POP(t_emit);
697 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
699 BE_TIMER_PUSH(t_abi);
700 be_abi_free(birg->abi);
703 be_do_stat_nodes(irg, "07 Final");
704 restore_optimization_state(&state);
706 BE_TIMER_POP(t_other);
708 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
710 #define LC_EMIT(timer) \
712 stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer)); \
714 printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
716 STOP_AND_RESET_TIMER(timer);
721 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
728 LC_EMIT(t_ssa_constr);
731 LC_EMIT(t_ra_prolog);
733 LC_EMIT(t_ra_spill_apply);
734 LC_EMIT(t_ra_constr);
737 LC_EMIT(t_ra_copymin);
739 LC_EMIT(t_ra_epilog);
748 be_sched_free_phase(irg);
752 /* switched off due to statistics (statistic module needs all irgs) */
753 #if 0 /* STA needs irgs */
754 #ifdef FIRM_STATISTICS
755 if (! stat_is_active())
756 #endif /* FIRM_STATISTICS */
759 stat_ev_ctx_pop("bemain_irg");
765 /* Main interface to the frontend. */
766 void be_main(FILE *file_handle, const char *cup_name)
768 ir_timer_t *t = NULL;
770 /* The user specified another config file to read. do that now. */
771 if(strlen(config_file) > 0) {
774 if((f = fopen(config_file, "rt")) != NULL) {
775 lc_opt_from_file(config_file, f, NULL);
780 if (be_options.timing == BE_TIME_ON) {
781 t = ir_timer_register("bemain", "measure complete bemain loop");
783 if (ir_timer_enter_high_priority()) {
784 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
787 ir_timer_reset_and_start(t);
790 #ifdef FIRM_STATISTICS
791 if (be_options.statev) {
792 const char *dot = strrchr(cup_name, '.');
793 const char *pos = dot ? dot : cup_name + strlen(cup_name);
794 char *buf = alloca(pos - cup_name + 1);
795 strncpy(buf, cup_name, pos - cup_name);
796 buf[pos - cup_name] = '\0';
798 be_options.statev = 1;
799 stat_ev_begin(buf, be_options.filtev);
803 /* never build code for pseudo irgs */
804 set_visit_pseudo_irgs(0);
808 be_main_loop(file_handle, cup_name);
810 if (be_options.timing == BE_TIME_ON) {
812 ir_timer_leave_high_priority();
814 stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
816 printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
820 #ifdef FIRM_STATISTICS
821 if (be_options.statev)
826 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
829 bs = bitset_alloca(cls->n_regs);
831 bitset_clear_all(bs);
833 assert(bitset_size(bs) == (unsigned)cls->n_regs);
834 arch_put_non_ignore_regs(&birg->main_env->arch_env, cls, bs);
836 be_abi_put_ignore_regs(birg->abi, cls, bs);
838 return bitset_popcnt(bs);