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
33 #include "lc_opts_enum.h"
43 #include "iredges_t.h"
48 #include "iroptimize.h"
51 #include "irprofile.h"
61 #include "belistsched.h"
64 #include "bechordal_t.h"
66 #include "becopyopt.h"
67 #include "becopystat.h"
68 #include "bessadestr.h"
71 #include "beschedmris.h"
74 #include "be_dbgout.h"
78 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
80 /* options visible for anyone */
81 static be_options_t be_options = {
82 DUMP_NONE, /* dump flags */
83 BE_TIME_OFF, /* no timing */
84 0, /* no opt profile */
85 0, /* try to omit frame pointer */
86 0, /* create PIC code */
87 0, /* create gprof compatible profiling code */
88 BE_VERIFY_WARN, /* verification level: warn */
89 "linux", /* target OS name */
90 "i44pc52.info.uni-karlsruhe.de", /* ilp server */
91 "cplex", /* ilp solver */
92 0, /* enable statistic event dumping */
93 "", /* print stat events */
97 static char config_file[256] = { 0 };
99 /* back end instruction set architecture to use */
100 static const arch_isa_if_t *isa_if = NULL;
102 /* possible dumping options */
103 static const lc_opt_enum_mask_items_t dump_items[] = {
104 { "none", DUMP_NONE },
105 { "initial", DUMP_INITIAL },
107 { "sched", DUMP_SCHED },
108 { "prepared", DUMP_PREPARED },
109 { "regalloc", DUMP_RA },
110 { "final", DUMP_FINAL },
112 { "all", 2 * DUMP_BE - 1 },
116 /* verify options. */
117 static const lc_opt_enum_int_items_t verify_items[] = {
118 { "off", BE_VERIFY_OFF },
119 { "warn", BE_VERIFY_WARN },
120 { "assert", BE_VERIFY_ASSERT },
124 static lc_opt_enum_mask_var_t dump_var = {
125 &be_options.dump_flags, dump_items
128 static lc_opt_enum_int_var_t verify_var = {
129 &be_options.verify_option, verify_items
132 static const lc_opt_table_entry_t be_main_options[] = {
133 LC_OPT_ENT_STR ("config", "read another config file containing backend options", config_file, sizeof(config_file)),
134 LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var),
135 LC_OPT_ENT_BOOL ("omitfp", "omit frame pointer", &be_options.omit_fp),
136 LC_OPT_ENT_BOOL ("pic", "create PIC code", &be_options.pic),
137 LC_OPT_ENT_BOOL ("gprof", "create gprof profiling code", &be_options.gprof),
138 LC_OPT_ENT_ENUM_PTR ("verify", "verify the backend irg", &verify_var),
139 LC_OPT_ENT_BOOL ("time", "get backend timing statistics", &be_options.timing),
140 LC_OPT_ENT_BOOL ("profile", "instrument the code for execution count profiling", &be_options.opt_profile),
141 LC_OPT_ENT_STR ("os", "specify target operating system", &be_options.target_os, sizeof(be_options.target_os)),
142 #ifdef FIRM_STATISTICS
143 LC_OPT_ENT_BOOL ("statev", "dump statistic events", &be_options.statev),
144 LC_OPT_ENT_STR ("filtev", "filter for stat events (regex if support is active", &be_options.filtev, sizeof(be_options.filtev)),
148 LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
149 LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
150 #endif /* WITH_ILP */
154 static be_module_list_entry_t *isa_ifs = NULL;
157 unsigned short asm_constraint_flags[256];
159 void be_init_default_asm_constraint_flags(void)
161 asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
162 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
163 asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
164 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
165 asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
166 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
167 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
169 asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
170 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
171 asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
172 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
174 asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
175 asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
176 asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
177 asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
178 asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
179 asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
180 asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
181 asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
182 asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
183 asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
184 asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
185 asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
186 asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
187 asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
189 asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
190 asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
191 asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
192 asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
193 asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
195 asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
196 asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
197 asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
198 asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
199 asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
200 asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
201 asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
202 asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
203 asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
204 asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
205 asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
207 asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
208 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
209 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
211 /* these should have been catched by the parsing code already */
212 asm_constraint_flags['#'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
213 asm_constraint_flags['*'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
214 asm_constraint_flags[' '] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
215 asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
216 asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
217 asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
220 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
222 asm_constraint_flags_t flags = 0;
224 asm_constraint_flags_t tflags;
226 for (c = constraint; *c != '\0'; ++c) {
229 /* 'comment' stuff */
230 while (*c != 0 && *c != ',')
234 /* 'comment' character */
243 tflags = asm_constraint_flags[(int) *c];
247 flags |= isa_if->parse_asm_constraint(&c);
254 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
255 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
257 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
258 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
260 flags |= ASM_CONSTRAINT_FLAG_INVALID;
262 if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ |
263 ASM_CONSTRAINT_FLAG_MODIFIER_WRITE |
264 ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
265 ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
267 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
273 int be_is_valid_clobber(const char *clobber)
275 /* memory is a valid clobber. (the frontend has to detect this case too,
276 * because it has to add memory edges to the asm) */
277 if (strcmp(clobber, "memory") == 0)
279 /* cc (condition code) is always valid */
280 if (strcmp(clobber, "cc") == 0)
283 return isa_if->is_valid_clobber(clobber);
286 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
291 be_add_module_to_list(&isa_ifs, name, (void*) isa);
294 void be_opt_register(void)
296 lc_opt_entry_t *be_grp;
297 static int run_once = 0;
303 be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
304 lc_opt_add_table(be_grp, be_main_options);
306 be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
307 &isa_ifs, (void**) &isa_if);
312 /* Parse one argument. */
313 int be_parse_arg(const char *arg)
315 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
316 if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
317 lc_opt_print_help_for_entry(be_grp, '-', stdout);
320 return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
323 /* Perform schedule verification if requested. */
324 static void be_sched_verify(ir_graph *irg, int verify_opt)
326 if (verify_opt == BE_VERIFY_WARN) {
327 be_verify_schedule(irg);
328 } else if (verify_opt == BE_VERIFY_ASSERT) {
329 assert(be_verify_schedule(irg) && "Schedule verification failed.");
333 /* Initialize the Firm backend. Must be run first in init_firm()! */
334 void firm_be_init(void)
340 /* Finalize the Firm backend. */
341 void firm_be_finish(void)
346 /* Returns the backend parameter */
347 const backend_params *be_get_backend_param(void)
349 return isa_if->get_params();
353 * Initializes the main environment for the backend.
355 * @param env an empty environment
356 * @param file_handle the file handle where the output will be written to
358 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
360 memset(env, 0, sizeof(*env));
361 env->options = &be_options;
362 env->ent_trampoline_map = pmap_create();
363 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
364 env->ent_pic_symbol_map = pmap_create();
365 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
367 remove_irp_type(env->pic_trampolines_type);
368 remove_irp_type(env->pic_symbols_type);
369 set_class_final(env->pic_trampolines_type, 1);
371 memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
372 env->arch_env = arch_env_init(isa_if, file_handle, env);
379 * Called when the be_main_env_t can be destroyed.
381 static void be_done_env(be_main_env_t *env)
383 arch_env_done(env->arch_env);
386 pmap_destroy(env->ent_trampoline_map);
387 pmap_destroy(env->ent_pic_symbol_map);
388 free_type(env->pic_trampolines_type);
389 free_type(env->pic_symbols_type);
393 * A wrapper around a firm dumper. Dumps only, if
396 * @param mask a bitmask containing the reason what will be dumped
397 * @param irg the IR graph to dump
398 * @param suffix the suffix for the dumper
399 * @param dumper the dumper to be called
401 static void dump(int mask, ir_graph *irg, const char *suffix)
403 if (be_options.dump_flags & mask)
404 dump_ir_graph(irg, suffix);
408 * Prepare a backend graph for code generation and initialize its irg
410 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
412 /* don't duplicate locals in backend when dumping... */
413 ir_remove_dump_flags(ir_dump_flag_consts_local);
415 dump(DUMP_INITIAL, irg, "begin");
419 memset(birg, 0, sizeof(*birg));
421 birg->main_env = env;
422 obstack_init(&birg->obst);
424 edges_deactivate_kind(irg, EDGE_KIND_DEP);
425 edges_activate_kind(irg, EDGE_KIND_DEP);
427 /* set the current graph (this is important for several firm functions) */
428 current_ir_graph = irg;
430 /* we do this before critical edge split. As this produces less returns,
431 because sometimes (= 164.gzip) multiple returns are slower */
432 normalize_n_returns(irg);
434 /* Remove critical edges */
435 remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
437 /* Ensure, that the ir_edges are computed. */
440 set_irg_phase_state(irg, phase_backend);
441 be_info_init_irg(irg);
443 dump(DUMP_INITIAL, irg, "prepared");
448 static const char *get_timer_name(be_timer_id_t id)
451 case T_ABI: return "abi";
452 case T_CODEGEN: return "codegen";
453 case T_RA_PREPARATION: return "ra_preparation";
454 case T_SCHED: return "sched";
455 case T_CONSTR: return "constr";
456 case T_FINISH: return "finish";
457 case T_EMIT: return "emit";
458 case T_VERIFY: return "verify";
459 case T_OTHER: return "other";
460 case T_HEIGHTS: return "heights";
461 case T_LIVE: return "live";
462 case T_EXECFREQ: return "execfreq";
463 case T_SSA_CONSTR: return "ssa_constr";
464 case T_RA_PROLOG: return "ra_prolog";
465 case T_RA_EPILOG: return "ra_epilog";
466 case T_RA_CONSTR: return "ra_constr";
467 case T_RA_SPILL: return "ra_spill";
468 case T_RA_SPILL_APPLY: return "ra_spill_apply";
469 case T_RA_COLOR: return "ra_color";
470 case T_RA_IFG: return "ra_ifg";
471 case T_RA_COPYMIN: return "ra_copymin";
472 case T_RA_SSA: return "ra_ssa";
473 case T_RA_OTHER: return "ra_other";
477 ir_timer_t *be_timers[T_LAST+1];
480 * The Firm backend main loop.
481 * Do architecture specific lowering for all graphs
482 * and call the architecture specific code generator.
484 * @param file_handle the file handle the output will be written to
485 * @param cup_name name of the compilation unit
487 static void be_main_loop(FILE *file_handle, const char *cup_name)
489 static const char suffix[] = ".prof";
491 int i, num_birgs, stat_active = 0;
493 char prof_filename[256];
495 ir_graph **irg_list, **backend_irg_list;
496 arch_env_t *arch_env;
498 be_timing = (be_options.timing == BE_TIME_ON);
501 for (i = 0; i < T_LAST+1; ++i) {
502 be_timers[i] = ir_timer_new();
506 be_init_env(&env, file_handle);
507 env.cup_name = cup_name;
512 arch_env = env.arch_env;
514 /* backend may provide an ordered list of irgs where code should be
516 irg_list = NEW_ARR_F(ir_graph *, 0);
517 backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
519 /* we might need 1 birg more for instrumentation constructor */
520 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
521 birgs = ALLOCAN(be_irg_t, num_birgs + 1);
525 /* First: initialize all birgs */
526 for (i = 0; i < num_birgs; ++i) {
527 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
528 initialize_birg(&birgs[i], irg, &env);
530 arch_env_handle_intrinsics(arch_env);
534 Get the filename for the profiling data.
535 Beware: '\0' is already included in sizeof(suffix)
537 memset(prof_filename, 0, sizeof(prof_filename));
538 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
539 strcat(prof_filename, suffix);
542 Next: Either instruments all irgs with profiling code
543 or try to read in profile data for current translation unit.
545 if (be_options.opt_profile) {
546 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
547 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
550 ir_profile_read(prof_filename);
553 #ifdef FIRM_STATISTICS
554 stat_active = stat_is_active();
555 #endif /* FIRM_STATISTICS */
558 for (i = 0; i < num_birgs; ++i) {
559 be_irg_t *birg = &birgs[i];
560 ir_graph *irg = birg->irg;
561 optimization_state_t state;
563 /* set the current graph (this is important for several firm functions) */
564 current_ir_graph = irg;
567 stat_ev_ctx_push_fobj("bemain_irg", irg);
568 be_stat_ev("bemain_insns_start", be_count_insns(irg));
569 be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
572 /* stop and reset timers */
573 be_timer_push(T_OTHER);
575 /* Verify the initial graph */
576 be_timer_push(T_VERIFY);
577 if (be_options.verify_option == BE_VERIFY_WARN) {
578 irg_verify(irg, VERIFY_ENFORCE_SSA);
579 be_check_dominance(irg);
580 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
581 assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
582 assert(be_check_dominance(irg) && "Dominance verification failed");
584 be_timer_pop(T_VERIFY);
586 /* get a code generator for this graph. */
587 arch_env->impl->init_graph(irg);
589 /* some transformations need to be done before abi introduce */
590 if (arch_env->impl->before_abi != NULL)
591 arch_env->impl->before_abi(irg);
593 /* implement the ABI conventions. */
594 be_timer_push(T_ABI);
595 be_abi_introduce(irg);
598 if (!arch_env->custom_abi) {
599 dump(DUMP_ABI, irg, "abi");
602 /* we have to do cfopt+remove_critical_edges as we can't have Bad-blocks
603 * or critical edges in the backend */
605 remove_critical_cf_edges(irg);
607 /* We often have dead code reachable through out-edges here. So for
608 * now we rebuild edges (as we need correct user count for code
610 edges_deactivate(irg);
613 dump(DUMP_PREPARED, irg, "before-code-selection");
615 if (be_options.verify_option == BE_VERIFY_WARN) {
616 be_check_dominance(irg);
617 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
618 assert(be_check_dominance(irg) && "Dominance verification failed");
621 /* perform codeselection */
622 be_timer_push(T_CODEGEN);
623 if (arch_env->impl->prepare_graph != NULL)
624 arch_env->impl->prepare_graph(irg);
625 be_timer_pop(T_CODEGEN);
627 if (be_options.verify_option == BE_VERIFY_WARN) {
628 be_check_dominance(irg);
629 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
630 assert(be_check_dominance(irg) && "Dominance verification failed");
633 be_timer_push(T_EXECFREQ);
635 * Create execution frequencies from profile data or estimate some
637 if (ir_profile_has_data())
638 birg->exec_freq = ir_create_execfreqs_from_profile(irg);
640 /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
641 * optimize graph phase merges blocks in the x86 backend */
642 edges_deactivate(irg);
643 birg->exec_freq = compute_execfreq(irg, 10);
645 be_timer_pop(T_EXECFREQ);
648 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
649 /* be_live_chk_compare(irg); */
651 /* schedule the irg */
652 be_timer_push(T_SCHED);
654 be_timer_pop(T_SCHED);
656 dump(DUMP_SCHED, irg, "sched");
659 be_timer_push(T_VERIFY);
660 be_sched_verify(irg, be_options.verify_option);
661 be_timer_pop(T_VERIFY);
663 /* introduce patterns to assure constraints */
664 be_timer_push(T_CONSTR);
665 /* we switch off optimizations here, because they might cause trouble */
666 save_optimization_state(&state);
668 set_opt_normalize(0);
671 /* add Keeps for should_be_different constrained nodes */
672 /* beware: needs schedule due to usage of be_ssa_constr */
673 assure_constraints(irg);
674 be_timer_pop(T_CONSTR);
676 dump(DUMP_SCHED, irg, "assured");
678 /* stuff needs to be done after scheduling but before register allocation */
679 be_timer_push(T_RA_PREPARATION);
680 if (arch_env->impl->before_ra != NULL)
681 arch_env->impl->before_ra(irg);
682 be_timer_pop(T_RA_PREPARATION);
684 /* connect all stack modifying nodes together (see beabi.c) */
685 be_timer_push(T_ABI);
686 be_abi_fix_stack_nodes(irg);
689 dump(DUMP_SCHED, irg, "fix_stack");
692 be_timer_push(T_VERIFY);
693 be_sched_verify(irg, be_options.verify_option);
694 be_timer_pop(T_VERIFY);
697 stat_ev_dbl("bemain_costs_before_ra",
698 be_estimate_irg_costs(irg, birg->exec_freq));
699 be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
700 be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
703 /* Do register allocation */
704 be_allocate_registers(irg);
706 #ifdef FIRM_STATISTICS
707 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
710 dump(DUMP_RA, irg, "ra");
712 /* let the code generator prepare the graph for emitter */
713 be_timer_push(T_FINISH);
714 if (arch_env->impl->after_ra != NULL)
715 arch_env->impl->after_ra(irg);
716 be_timer_pop(T_FINISH);
718 /* fix stack offsets */
719 be_timer_push(T_ABI);
720 be_abi_fix_stack_nodes(irg);
721 be_remove_dead_nodes_from_schedule(irg);
722 be_abi_fix_stack_bias(irg);
725 dump(DUMP_SCHED, irg, "fix_stack_after_ra");
727 be_timer_push(T_FINISH);
728 if (arch_env->impl->finish != NULL)
729 arch_env->impl->finish(irg);
730 be_timer_pop(T_FINISH);
732 dump(DUMP_FINAL, irg, "finish");
735 be_stat_ev("bemain_insns_finish", be_count_insns(irg));
736 be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
739 /* check schedule and register allocation */
740 be_timer_push(T_VERIFY);
741 if (be_options.verify_option == BE_VERIFY_WARN) {
742 irg_verify(irg, VERIFY_ENFORCE_SSA);
743 be_check_dominance(irg);
744 be_verify_schedule(irg);
745 be_verify_register_allocation(irg);
746 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
747 assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
748 assert(be_check_dominance(irg) && "Dominance verification failed");
749 assert(be_verify_schedule(irg) && "Schedule verification failed");
750 assert(be_verify_register_allocation(irg)
751 && "register allocation verification failed");
754 be_timer_pop(T_VERIFY);
756 /* emit assembler code */
757 be_timer_push(T_EMIT);
758 if (arch_env->impl->emit != NULL)
759 arch_env->impl->emit(irg);
760 be_timer_pop(T_EMIT);
762 dump(DUMP_FINAL, irg, "end");
764 be_timer_push(T_ABI);
768 restore_optimization_state(&state);
770 be_timer_pop(T_OTHER);
774 if (stat_ev_enabled) {
775 for (t = 0; t < T_LAST+1; ++t) {
777 snprintf(buf, sizeof(buf), "bemain_time_%s",
779 stat_ev_dbl(buf, ir_timer_elapsed_usec(be_timers[i]));
782 printf("==>> IRG %s <<==\n",
783 get_entity_name(get_irg_entity(irg)));
784 for (t = 0; t < T_LAST+1; ++t) {
785 double val = ir_timer_elapsed_usec(be_timers[t]) / 1000.0;
786 printf("%-20s: %8.3lf msec\n", get_timer_name(t), val);
789 for (t = 0; t < T_LAST+1; ++t) {
790 ir_timer_stop(be_timers[t]);
791 ir_timer_reset(be_timers[t]);
796 stat_ev_ctx_pop("bemain_irg");
804 /* Main interface to the frontend. */
805 void be_main(FILE *file_handle, const char *cup_name)
807 ir_timer_t *t = NULL;
809 /* The user specified another config file to read. do that now. */
810 if (config_file[0] != '\0') {
811 FILE *f = fopen(config_file, "rt");
814 lc_opt_from_file(config_file, f, NULL);
817 fprintf(stderr, "Warning: Cannot open config file '%s'\n", config_file);
821 if (be_options.timing == BE_TIME_ON) {
824 if (ir_timer_enter_high_priority()) {
825 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
828 ir_timer_reset_and_start(t);
831 #ifdef FIRM_STATISTICS
832 if (be_options.statev) {
833 const char *dot = strrchr(cup_name, '.');
834 const char *pos = dot ? dot : cup_name + strlen(cup_name);
835 char *buf = ALLOCAN(char, pos - cup_name + 1);
836 strncpy(buf, cup_name, pos - cup_name);
837 buf[pos - cup_name] = '\0';
839 be_options.statev = 1;
840 stat_ev_begin(buf, be_options.filtev);
841 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
845 be_main_loop(file_handle, cup_name);
847 if (be_options.timing == BE_TIME_ON) {
849 ir_timer_leave_high_priority();
851 stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
853 double val = ir_timer_elapsed_usec(t) / 1000.0;
854 printf("%-20s: %8.3lf msec\n", "BEMAINLOOP", val);
858 #ifdef FIRM_STATISTICS
859 if (be_options.statev) {
860 stat_ev_ctx_pop("bemain_compilation_unit");
866 static int do_lower_for_target(ir_prog *irp, void *context)
868 const backend_params *be_params = be_get_backend_param();
869 be_params->lower_for_target();
875 ir_prog_pass_t *lower_for_target_pass(const char *name)
877 ir_prog_pass_t *pass = XMALLOCZ(ir_prog_pass_t);
878 return def_prog_pass_constructor(pass,
879 name ? name : "lower_for_target",
880 do_lower_for_target);
883 unsigned be_put_ignore_regs(const ir_graph *irg,
884 const arch_register_class_t *cls, bitset_t *bs)
887 bs = bitset_alloca(cls->n_regs);
889 bitset_clear_all(bs);
891 assert(bitset_size(bs) == cls->n_regs);
892 arch_put_non_ignore_regs(cls, bs);
894 be_abi_put_ignore_regs(be_get_irg_abi(irg), cls, bs);
896 return bitset_popcount(bs);