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"
60 #include "belistsched.h"
63 #include "bechordal_t.h"
65 #include "becopyopt.h"
66 #include "becopystat.h"
67 #include "bessadestr.h"
70 #include "beschedmris.h"
73 #include "be_dbgout.h"
76 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
79 #include "beilpsched.h"
82 /* options visible for anyone */
83 static be_options_t be_options = {
84 DUMP_NONE, /* dump flags */
85 BE_TIME_OFF, /* no timing */
86 0, /* no opt profile */
87 0, /* try to omit frame pointer */
88 0, /* try to omit leaf frame pointer */
89 0, /* create PIC code */
90 0, /* create gprof compatible profiling code */
91 BE_VRFY_WARN, /* verification level: warn */
92 BE_SCHED_LIST, /* scheduler: list scheduler */
93 "linux", /* target OS name */
94 "i44pc52.info.uni-karlsruhe.de", /* ilp server */
95 "cplex", /* ilp solver */
96 0, /* enable statistic event dumping */
97 "", /* print stat events */
101 static char config_file[256] = { 0 };
103 /* back end instruction set architecture to use */
104 static const arch_isa_if_t *isa_if = NULL;
106 /* possible dumping options */
107 static const lc_opt_enum_mask_items_t dump_items[] = {
108 { "none", DUMP_NONE },
109 { "initial", DUMP_INITIAL },
111 { "sched", DUMP_SCHED },
112 { "prepared", DUMP_PREPARED },
113 { "regalloc", DUMP_RA },
114 { "final", DUMP_FINAL },
116 { "all", 2 * DUMP_BE - 1 },
120 /* verify options. */
121 static const lc_opt_enum_int_items_t vrfy_items[] = {
122 { "off", BE_VRFY_OFF },
123 { "warn", BE_VRFY_WARN },
124 { "assert", BE_VRFY_ASSERT },
128 /* scheduling options. */
129 static const lc_opt_enum_int_items_t sched_items[] = {
130 { "list", BE_SCHED_LIST },
132 { "ilp", BE_SCHED_ILP },
133 #endif /* WITH_ILP */
137 static lc_opt_enum_mask_var_t dump_var = {
138 &be_options.dump_flags, dump_items
141 static lc_opt_enum_int_var_t vrfy_var = {
142 &be_options.vrfy_option, vrfy_items
145 static lc_opt_enum_int_var_t sched_var = {
146 &be_options.scheduler, sched_items
149 static const lc_opt_table_entry_t be_main_options[] = {
150 LC_OPT_ENT_STR ("config", "read another config file containing backend options", config_file, sizeof(config_file)),
151 LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var),
152 LC_OPT_ENT_BOOL ("omitfp", "omit frame pointer", &be_options.omit_fp),
153 LC_OPT_ENT_BOOL ("omitleaffp", "omit frame pointer in leaf routines", &be_options.omit_leaf_fp),
154 LC_OPT_ENT_BOOL ("pic", "create PIC code", &be_options.pic),
155 LC_OPT_ENT_BOOL ("gprof", "create gprof profiling code", &be_options.gprof),
156 LC_OPT_ENT_ENUM_PTR ("verify", "verify the backend irg", &vrfy_var),
157 LC_OPT_ENT_BOOL ("time", "get backend timing statistics", &be_options.timing),
158 LC_OPT_ENT_BOOL ("profile", "instrument the code for execution count profiling", &be_options.opt_profile),
159 LC_OPT_ENT_ENUM_PTR ("sched", "select a scheduler", &sched_var),
160 LC_OPT_ENT_STR ("os", "specify target operating system", &be_options.target_os, sizeof(be_options.target_os)),
161 #ifdef FIRM_STATISTICS
162 LC_OPT_ENT_BOOL ("statev", "dump statistic events", &be_options.statev),
163 LC_OPT_ENT_STR ("filtev", "filter for stat events (regex if support is active", &be_options.filtev, sizeof(be_options.filtev)),
167 LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
168 LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
169 #endif /* WITH_ILP */
173 static be_module_list_entry_t *isa_ifs = NULL;
176 unsigned short asm_constraint_flags[256];
178 void be_init_default_asm_constraint_flags(void)
180 asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
181 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
182 asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
183 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
184 asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
185 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
186 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
188 asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
189 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
190 asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
191 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
193 asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
194 asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
195 asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
196 asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
197 asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
198 asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
199 asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
200 asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
201 asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
202 asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
203 asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
204 asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
205 asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
206 asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
208 asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
209 asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
210 asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
211 asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
212 asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
214 asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
215 asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
216 asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
217 asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
218 asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
219 asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
220 asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
221 asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
222 asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
223 asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
224 asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
226 asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
227 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
228 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
230 /* these should have been catched by the parsing code already */
231 asm_constraint_flags['#'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
232 asm_constraint_flags['*'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
233 asm_constraint_flags[' '] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
234 asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
235 asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
236 asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
239 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
241 asm_constraint_flags_t flags = 0;
243 asm_constraint_flags_t tflags;
245 for (c = constraint; *c != '\0'; ++c) {
248 /* 'comment' stuff */
249 while (*c != 0 && *c != ',')
253 /* 'comment' character */
262 tflags = asm_constraint_flags[(int) *c];
266 flags |= isa_if->parse_asm_constraint(&c);
273 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
274 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
276 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
277 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
279 flags |= ASM_CONSTRAINT_FLAG_INVALID;
281 if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ |
282 ASM_CONSTRAINT_FLAG_MODIFIER_WRITE |
283 ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
284 ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
286 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
292 int be_is_valid_clobber(const char *clobber)
294 /* memory is a valid clobber. (the frontend has to detect this case too,
295 * because it has to add memory edges to the asm) */
296 if (strcmp(clobber, "memory") == 0)
298 /* cc (condition code) is always valid */
299 if (strcmp(clobber, "cc") == 0)
302 return isa_if->is_valid_clobber(clobber);
305 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
310 be_add_module_to_list(&isa_ifs, name, (void*) isa);
313 void be_opt_register(void)
315 lc_opt_entry_t *be_grp;
316 static int run_once = 0;
322 be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
323 lc_opt_add_table(be_grp, be_main_options);
325 be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
326 &isa_ifs, (void**) &isa_if);
331 /* Parse one argument. */
332 int be_parse_arg(const char *arg)
334 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
335 if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
336 lc_opt_print_help_for_entry(be_grp, '-', stdout);
339 return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
342 /** The be parameters returned by default, all off. */
343 static const backend_params be_params = {
344 0, /* need dword lowering */
345 0, /* don't support inline assembler yet */
346 NULL, /* will be set later */
347 NULL, /* but yet no creator function */
348 NULL, /* context for create_intrinsic_fkt */
349 NULL, /* no if conversion settings */
350 NULL, /* no float arithmetic mode */
351 0, /* no trampoline support: size 0 */
352 0, /* no trampoline support: align 0 */
353 NULL, /* no trampoline support: no trampoline builder */
354 4 /* alignment of stack parameter */
357 /* Perform schedule verification if requested. */
358 static void be_sched_vrfy(ir_graph *irg, int vrfy_opt)
360 if (vrfy_opt == BE_VRFY_WARN) {
361 be_verify_schedule(irg);
362 } else if (vrfy_opt == BE_VRFY_ASSERT) {
363 assert(be_verify_schedule(irg) && "Schedule verification failed.");
367 /* Initialize the Firm backend. Must be run first in init_firm()! */
368 void firm_be_init(void)
374 /* Finalize the Firm backend. */
375 void firm_be_finish(void)
380 /* Returns the backend parameter */
381 const backend_params *be_get_backend_param(void)
383 if (isa_if->get_params)
384 return isa_if->get_params();
389 * Initializes the main environment for the backend.
391 * @param env an empty environment
392 * @param file_handle the file handle where the output will be written to
394 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
396 memset(env, 0, sizeof(*env));
397 env->options = &be_options;
398 env->ent_trampoline_map = pmap_create();
399 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
400 env->ent_pic_symbol_map = pmap_create();
401 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
403 remove_irp_type(env->pic_trampolines_type);
404 remove_irp_type(env->pic_symbols_type);
405 set_class_final(env->pic_trampolines_type, 1);
407 memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
408 env->arch_env = arch_env_init(isa_if, file_handle, env);
415 * Called when the be_main_env_t can be destroyed.
417 static void be_done_env(be_main_env_t *env)
419 arch_env_done(env->arch_env);
422 pmap_destroy(env->ent_trampoline_map);
423 pmap_destroy(env->ent_pic_symbol_map);
424 free_type(env->pic_trampolines_type);
425 free_type(env->pic_symbols_type);
429 * A wrapper around a firm dumper. Dumps only, if
432 * @param mask a bitmask containing the reason what will be dumped
433 * @param irg the IR graph to dump
434 * @param suffix the suffix for the dumper
435 * @param dumper the dumper to be called
437 static void dump(int mask, ir_graph *irg, const char *suffix)
439 if (be_options.dump_flags & mask)
440 dump_ir_graph(irg, suffix);
444 * Prepare a backend graph for code generation and initialize its irg
446 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
448 /* don't duplicate locals in backend when dumping... */
449 ir_remove_dump_flags(ir_dump_flag_consts_local);
451 dump(DUMP_INITIAL, irg, "begin");
455 memset(birg, 0, sizeof(*birg));
457 birg->main_env = env;
458 obstack_init(&birg->obst);
460 edges_deactivate_kind(irg, EDGE_KIND_DEP);
461 edges_activate_kind(irg, EDGE_KIND_DEP);
463 /* set the current graph (this is important for several firm functions) */
464 current_ir_graph = irg;
466 /* Normalize proj nodes. */
467 normalize_proj_nodes(irg);
469 /* we do this before critical edge split. As this produces less returns,
470 because sometimes (= 164.gzip) multiple returns are slower */
471 normalize_n_returns(irg);
473 /* Remove critical edges */
474 remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
476 /* Ensure, that the ir_edges are computed. */
479 set_irg_phase_state(irg, phase_backend);
480 be_info_init_irg(irg);
482 dump(DUMP_INITIAL, irg, "prepared");
485 #define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while (0)
489 static const char *get_timer_name(be_timer_id_t id)
492 case T_ABI: return "abi";
493 case T_CODEGEN: return "codegen";
494 case T_RA_PREPARATION: return "ra_preparation";
495 case T_SCHED: return "sched";
496 case T_CONSTR: return "constr";
497 case T_FINISH: return "finish";
498 case T_EMIT: return "emit";
499 case T_VERIFY: return "verify";
500 case T_OTHER: return "other";
501 case T_HEIGHTS: return "heights";
502 case T_LIVE: return "live";
503 case T_EXECFREQ: return "execfreq";
504 case T_SSA_CONSTR: return "ssa_constr";
505 case T_RA_PROLOG: return "ra_prolog";
506 case T_RA_EPILOG: return "ra_epilog";
507 case T_RA_CONSTR: return "ra_constr";
508 case T_RA_SPILL: return "ra_spill";
509 case T_RA_SPILL_APPLY: return "ra_spill_apply";
510 case T_RA_COLOR: return "ra_color";
511 case T_RA_IFG: return "ra_ifg";
512 case T_RA_COPYMIN: return "ra_copymin";
513 case T_RA_SSA: return "ra_ssa";
514 case T_RA_OTHER: return "ra_other";
518 ir_timer_t *be_timers[T_LAST+1];
521 * The Firm backend main loop.
522 * Do architecture specific lowering for all graphs
523 * and call the architecture specific code generator.
525 * @param file_handle the file handle the output will be written to
526 * @param cup_name name of the compilation unit
528 static void be_main_loop(FILE *file_handle, const char *cup_name)
530 static const char suffix[] = ".prof";
532 int i, num_birgs, stat_active = 0;
534 char prof_filename[256];
536 ir_graph **irg_list, **backend_irg_list;
537 arch_env_t *arch_env;
539 be_timing = (be_options.timing == BE_TIME_ON);
542 for (i = 0; i < T_LAST+1; ++i) {
543 be_timers[i] = ir_timer_new();
547 be_init_env(&env, file_handle);
548 env.cup_name = cup_name;
553 arch_env = env.arch_env;
555 /* backend may provide an ordered list of irgs where code should be
557 irg_list = NEW_ARR_F(ir_graph *, 0);
558 backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
560 /* we might need 1 birg more for instrumentation constructor */
561 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
562 birgs = ALLOCAN(be_irg_t, num_birgs + 1);
566 /* First: initialize all birgs */
567 for (i = 0; i < num_birgs; ++i) {
568 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
569 initialize_birg(&birgs[i], irg, &env);
571 arch_env_handle_intrinsics(arch_env);
575 Get the filename for the profiling data.
576 Beware: '\0' is already included in sizeof(suffix)
578 memset(prof_filename, 0, sizeof(prof_filename));
579 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
580 strcat(prof_filename, suffix);
583 Next: Either instruments all irgs with profiling code
584 or try to read in profile data for current translation unit.
586 if (be_options.opt_profile) {
587 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
588 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
591 ir_profile_read(prof_filename);
594 #ifdef FIRM_STATISTICS
595 stat_active = stat_is_active();
596 #endif /* FIRM_STATISTICS */
599 for (i = 0; i < num_birgs; ++i) {
600 be_irg_t *birg = &birgs[i];
601 ir_graph *irg = birg->irg;
602 optimization_state_t state;
603 const arch_code_generator_if_t *cg_if;
605 /* set the current graph (this is important for several firm functions) */
606 current_ir_graph = irg;
609 stat_ev_ctx_push_fobj("bemain_irg", irg);
610 be_stat_ev("bemain_insns_start", be_count_insns(irg));
611 be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
614 /* stop and reset timers */
615 be_timer_push(T_OTHER);
617 /* Verify the initial graph */
618 be_timer_push(T_VERIFY);
619 if (be_options.vrfy_option == BE_VRFY_WARN) {
620 irg_verify(irg, VRFY_ENFORCE_SSA);
621 be_check_dominance(irg);
622 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
623 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
624 assert(be_check_dominance(irg) && "Dominance verification failed");
626 be_timer_pop(T_VERIFY);
628 /* Get the code generator interface. */
629 cg_if = arch_env_get_code_generator_if(arch_env);
631 /* get a code generator for this graph. */
632 birg->cg = cg_if->init(irg);
634 /* some transformations need to be done before abi introduce */
635 assert(birg->cg->impl->before_abi == NULL || !arch_env->custom_abi);
636 arch_code_generator_before_abi(birg->cg);
638 /* implement the ABI conventions. */
639 be_timer_push(T_ABI);
640 be_abi_introduce(irg);
643 if (!arch_env->custom_abi) {
644 dump(DUMP_ABI, irg, "abi");
645 /* do local optimizations */
646 optimize_graph_df(irg);
649 /* we have to do cfopt+remove_critical_edges as we can't have Bad-blocks
650 * or critical edges in the backend */
652 remove_critical_cf_edges(irg);
654 /* We often have dead code reachable through out-edges here. So for
655 * now we rebuild edges (as we need correct user count for code
657 edges_deactivate(irg);
660 dump(DUMP_PREPARED, irg, "before-code-selection");
662 if (be_options.vrfy_option == BE_VRFY_WARN) {
663 be_check_dominance(irg);
664 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
665 assert(be_check_dominance(irg) && "Dominance verification failed");
668 /* perform codeselection */
669 be_timer_push(T_CODEGEN);
670 arch_code_generator_prepare_graph(birg->cg);
671 be_timer_pop(T_CODEGEN);
673 if (be_options.vrfy_option == BE_VRFY_WARN) {
674 be_check_dominance(irg);
675 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
676 assert(be_check_dominance(irg) && "Dominance verification failed");
679 be_timer_push(T_EXECFREQ);
681 * Create execution frequencies from profile data or estimate some
683 if (ir_profile_has_data())
684 birg->exec_freq = ir_create_execfreqs_from_profile(irg);
686 /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
687 * optimize graph phase merges blocks in the x86 backend */
688 edges_deactivate(irg);
689 birg->exec_freq = compute_execfreq(irg, 10);
691 be_timer_pop(T_EXECFREQ);
694 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
695 /* be_live_chk_compare(irg); */
697 /* schedule the irg */
698 be_timer_push(T_SCHED);
699 switch (be_options.scheduler) {
701 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
709 #endif /* WITH_ILP */
711 be_timer_pop(T_SCHED);
713 dump(DUMP_SCHED, irg, "sched");
716 be_timer_push(T_VERIFY);
717 be_sched_vrfy(irg, be_options.vrfy_option);
718 be_timer_pop(T_VERIFY);
720 /* introduce patterns to assure constraints */
721 be_timer_push(T_CONSTR);
722 /* we switch off optimizations here, because they might cause trouble */
723 save_optimization_state(&state);
725 set_opt_normalize(0);
728 /* add Keeps for should_be_different constrained nodes */
729 /* beware: needs schedule due to usage of be_ssa_constr */
730 assure_constraints(irg);
731 be_timer_pop(T_CONSTR);
733 dump(DUMP_SCHED, irg, "assured");
735 /* stuff needs to be done after scheduling but before register allocation */
736 be_timer_push(T_RA_PREPARATION);
737 arch_code_generator_before_ra(birg->cg);
738 be_timer_pop(T_RA_PREPARATION);
740 /* connect all stack modifying nodes together (see beabi.c) */
741 be_timer_push(T_ABI);
742 be_abi_fix_stack_nodes(irg);
745 dump(DUMP_SCHED, irg, "fix_stack");
748 be_timer_push(T_VERIFY);
749 be_sched_vrfy(irg, be_options.vrfy_option);
750 be_timer_pop(T_VERIFY);
753 stat_ev_dbl("bemain_costs_before_ra",
754 be_estimate_irg_costs(irg, birg->exec_freq));
755 be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
756 be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
759 /* Do register allocation */
760 be_allocate_registers(irg);
762 #ifdef FIRM_STATISTICS
763 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
766 dump(DUMP_RA, irg, "ra");
768 /* let the code generator prepare the graph for emitter */
769 be_timer_push(T_FINISH);
770 arch_code_generator_after_ra(birg->cg);
771 be_timer_pop(T_FINISH);
773 /* fix stack offsets */
774 be_timer_push(T_ABI);
775 be_abi_fix_stack_nodes(irg);
776 be_remove_dead_nodes_from_schedule(irg);
777 be_abi_fix_stack_bias(irg);
780 dump(DUMP_SCHED, irg, "fix_stack_after_ra");
782 be_timer_push(T_FINISH);
783 arch_code_generator_finish(birg->cg);
784 be_timer_pop(T_FINISH);
786 dump(DUMP_FINAL, irg, "finish");
789 be_stat_ev("bemain_insns_finish", be_count_insns(irg));
790 be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
793 /* check schedule and register allocation */
794 be_timer_push(T_VERIFY);
795 if (be_options.vrfy_option == BE_VRFY_WARN) {
796 irg_verify(irg, VRFY_ENFORCE_SSA);
797 be_check_dominance(irg);
798 be_verify_schedule(irg);
799 be_verify_register_allocation(irg);
800 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
801 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
802 assert(be_check_dominance(irg) && "Dominance verification failed");
803 assert(be_verify_schedule(irg) && "Schedule verification failed");
804 assert(be_verify_register_allocation(irg)
805 && "register allocation verification failed");
808 be_timer_pop(T_VERIFY);
810 /* emit assembler code */
811 be_timer_push(T_EMIT);
812 arch_code_generator_done(birg->cg);
813 be_timer_pop(T_EMIT);
815 dump(DUMP_FINAL, irg, "end");
817 be_timer_push(T_ABI);
821 restore_optimization_state(&state);
823 be_timer_pop(T_OTHER);
827 if (stat_ev_enabled) {
828 for (t = 0; t < T_LAST+1; ++t) {
830 snprintf(buf, sizeof(buf), "bemain_time_%s",
832 stat_ev_dbl(buf, ir_timer_elapsed_usec(be_timers[i]));
835 printf("==>> IRG %s <<==\n",
836 get_entity_name(get_irg_entity(irg)));
837 for (t = 0; t < T_LAST+1; ++t) {
838 double val = ir_timer_elapsed_usec(be_timers[t]) / 1000.0;
839 printf("%-20s: %8.3lf msec\n", get_timer_name(t), val);
842 for (t = 0; t < T_LAST+1; ++t) {
843 ir_timer_stop(be_timers[t]);
844 ir_timer_reset(be_timers[t]);
849 stat_ev_ctx_pop("bemain_irg");
857 /* Main interface to the frontend. */
858 void be_main(FILE *file_handle, const char *cup_name)
860 ir_timer_t *t = NULL;
862 /* The user specified another config file to read. do that now. */
863 if (config_file[0] != '\0') {
864 FILE *f = fopen(config_file, "rt");
867 lc_opt_from_file(config_file, f, NULL);
870 fprintf(stderr, "Warning: Cannot open config file '%s'\n", config_file);
874 if (be_options.timing == BE_TIME_ON) {
877 if (ir_timer_enter_high_priority()) {
878 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
881 ir_timer_reset_and_start(t);
884 #ifdef FIRM_STATISTICS
885 if (be_options.statev) {
886 const char *dot = strrchr(cup_name, '.');
887 const char *pos = dot ? dot : cup_name + strlen(cup_name);
888 char *buf = ALLOCAN(char, pos - cup_name + 1);
889 strncpy(buf, cup_name, pos - cup_name);
890 buf[pos - cup_name] = '\0';
892 be_options.statev = 1;
893 stat_ev_begin(buf, be_options.filtev);
894 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
898 /* never build code for pseudo irgs */
899 set_visit_pseudo_irgs(0);
901 be_main_loop(file_handle, cup_name);
903 if (be_options.timing == BE_TIME_ON) {
905 ir_timer_leave_high_priority();
907 stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
909 double val = ir_timer_elapsed_usec(t) / 1000.0;
910 printf("%-20s: %8.3lf msec\n", "BEMAINLOOP", val);
914 #ifdef FIRM_STATISTICS
915 if (be_options.statev) {
916 stat_ev_ctx_pop("bemain_compilation_unit");
922 unsigned be_put_ignore_regs(const ir_graph *irg,
923 const arch_register_class_t *cls, bitset_t *bs)
926 bs = bitset_alloca(cls->n_regs);
928 bitset_clear_all(bs);
930 assert(bitset_size(bs) == cls->n_regs);
931 arch_put_non_ignore_regs(cls, bs);
933 be_abi_put_ignore_regs(be_get_irg_abi(irg), cls, bs);
935 return bitset_popcount(bs);