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)
81 #include "beilpsched.h"
84 /* options visible for anyone */
85 static be_options_t be_options = {
86 DUMP_NONE, /* dump flags */
87 BE_TIME_OFF, /* no timing */
88 0, /* no opt profile */
89 0, /* try to omit frame pointer */
90 0, /* try to omit leaf frame pointer */
91 0, /* create PIC code */
92 0, /* create gprof compatible profiling code */
93 BE_VERIFY_WARN, /* verification level: warn */
94 BE_SCHED_LIST, /* scheduler: list scheduler */
95 "linux", /* target OS name */
96 "i44pc52.info.uni-karlsruhe.de", /* ilp server */
97 "cplex", /* ilp solver */
98 0, /* enable statistic event dumping */
99 "", /* print stat events */
103 static char config_file[256] = { 0 };
105 /* back end instruction set architecture to use */
106 static const arch_isa_if_t *isa_if = NULL;
108 /* possible dumping options */
109 static const lc_opt_enum_mask_items_t dump_items[] = {
110 { "none", DUMP_NONE },
111 { "initial", DUMP_INITIAL },
113 { "sched", DUMP_SCHED },
114 { "prepared", DUMP_PREPARED },
115 { "regalloc", DUMP_RA },
116 { "final", DUMP_FINAL },
118 { "all", 2 * DUMP_BE - 1 },
122 /* verify options. */
123 static const lc_opt_enum_int_items_t verify_items[] = {
124 { "off", BE_VERIFY_OFF },
125 { "warn", BE_VERIFY_WARN },
126 { "assert", BE_VERIFY_ASSERT },
130 /* scheduling options. */
131 static const lc_opt_enum_int_items_t sched_items[] = {
132 { "list", BE_SCHED_LIST },
134 { "ilp", BE_SCHED_ILP },
135 #endif /* WITH_ILP */
139 static lc_opt_enum_mask_var_t dump_var = {
140 &be_options.dump_flags, dump_items
143 static lc_opt_enum_int_var_t verify_var = {
144 &be_options.verify_option, verify_items
147 static lc_opt_enum_int_var_t sched_var = {
148 &be_options.scheduler, sched_items
151 static const lc_opt_table_entry_t be_main_options[] = {
152 LC_OPT_ENT_STR ("config", "read another config file containing backend options", config_file, sizeof(config_file)),
153 LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var),
154 LC_OPT_ENT_BOOL ("omitfp", "omit frame pointer", &be_options.omit_fp),
155 LC_OPT_ENT_BOOL ("omitleaffp", "omit frame pointer in leaf routines", &be_options.omit_leaf_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 ("verify", "verify the backend irg", &verify_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;
178 unsigned short asm_constraint_flags[256];
180 void be_init_default_asm_constraint_flags(void)
182 asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
183 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
184 asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
185 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
186 asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
187 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
188 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
190 asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
191 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
192 asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
193 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
195 asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
196 asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
197 asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
198 asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
199 asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
200 asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
201 asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
202 asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
203 asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
204 asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
205 asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
206 asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
207 asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
208 asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
210 asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
211 asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
212 asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
213 asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
214 asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
216 asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
217 asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
218 asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
219 asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
220 asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
221 asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
222 asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
223 asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
224 asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
225 asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
226 asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
228 asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
229 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
230 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
232 /* these should have been catched by the parsing code already */
233 asm_constraint_flags['#'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
234 asm_constraint_flags['*'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
235 asm_constraint_flags[' '] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
236 asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
237 asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
238 asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
241 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
243 asm_constraint_flags_t flags = 0;
245 asm_constraint_flags_t tflags;
247 for (c = constraint; *c != '\0'; ++c) {
250 /* 'comment' stuff */
251 while (*c != 0 && *c != ',')
255 /* 'comment' character */
264 tflags = asm_constraint_flags[(int) *c];
268 flags |= isa_if->parse_asm_constraint(&c);
275 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
276 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
278 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
279 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
281 flags |= ASM_CONSTRAINT_FLAG_INVALID;
283 if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ |
284 ASM_CONSTRAINT_FLAG_MODIFIER_WRITE |
285 ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
286 ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
288 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
294 int be_is_valid_clobber(const char *clobber)
296 /* memory is a valid clobber. (the frontend has to detect this case too,
297 * because it has to add memory edges to the asm) */
298 if (strcmp(clobber, "memory") == 0)
300 /* cc (condition code) is always valid */
301 if (strcmp(clobber, "cc") == 0)
304 return isa_if->is_valid_clobber(clobber);
307 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
312 be_add_module_to_list(&isa_ifs, name, (void*) isa);
315 void be_opt_register(void)
317 lc_opt_entry_t *be_grp;
318 static int run_once = 0;
324 be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
325 lc_opt_add_table(be_grp, be_main_options);
327 be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
328 &isa_ifs, (void**) &isa_if);
333 /* Parse one argument. */
334 int be_parse_arg(const char *arg)
336 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
337 if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
338 lc_opt_print_help_for_entry(be_grp, '-', stdout);
341 return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
344 /* Perform schedule verification if requested. */
345 static void be_sched_verify(ir_graph *irg, int verify_opt)
347 if (verify_opt == BE_VERIFY_WARN) {
348 be_verify_schedule(irg);
349 } else if (verify_opt == BE_VERIFY_ASSERT) {
350 assert(be_verify_schedule(irg) && "Schedule verification failed.");
354 /* Initialize the Firm backend. Must be run first in init_firm()! */
355 void firm_be_init(void)
361 /* Finalize the Firm backend. */
362 void firm_be_finish(void)
367 /* Returns the backend parameter */
368 const backend_params *be_get_backend_param(void)
370 return isa_if->get_params();
374 * Initializes the main environment for the backend.
376 * @param env an empty environment
377 * @param file_handle the file handle where the output will be written to
379 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
381 memset(env, 0, sizeof(*env));
382 env->options = &be_options;
383 env->ent_trampoline_map = pmap_create();
384 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
385 env->ent_pic_symbol_map = pmap_create();
386 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
388 remove_irp_type(env->pic_trampolines_type);
389 remove_irp_type(env->pic_symbols_type);
390 set_class_final(env->pic_trampolines_type, 1);
392 memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
393 env->arch_env = arch_env_init(isa_if, file_handle, env);
400 * Called when the be_main_env_t can be destroyed.
402 static void be_done_env(be_main_env_t *env)
404 arch_env_done(env->arch_env);
407 pmap_destroy(env->ent_trampoline_map);
408 pmap_destroy(env->ent_pic_symbol_map);
409 free_type(env->pic_trampolines_type);
410 free_type(env->pic_symbols_type);
414 * A wrapper around a firm dumper. Dumps only, if
417 * @param mask a bitmask containing the reason what will be dumped
418 * @param irg the IR graph to dump
419 * @param suffix the suffix for the dumper
420 * @param dumper the dumper to be called
422 static void dump(int mask, ir_graph *irg, const char *suffix)
424 if (be_options.dump_flags & mask)
425 dump_ir_graph(irg, suffix);
429 * Prepare a backend graph for code generation and initialize its irg
431 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
433 /* don't duplicate locals in backend when dumping... */
434 ir_remove_dump_flags(ir_dump_flag_consts_local);
436 dump(DUMP_INITIAL, irg, "begin");
440 memset(birg, 0, sizeof(*birg));
442 birg->main_env = env;
443 obstack_init(&birg->obst);
445 edges_deactivate_kind(irg, EDGE_KIND_DEP);
446 edges_activate_kind(irg, EDGE_KIND_DEP);
448 /* set the current graph (this is important for several firm functions) */
449 current_ir_graph = irg;
451 /* we do this before critical edge split. As this produces less returns,
452 because sometimes (= 164.gzip) multiple returns are slower */
453 normalize_n_returns(irg);
455 /* Remove critical edges */
456 remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
458 /* Ensure, that the ir_edges are computed. */
461 set_irg_phase_state(irg, phase_backend);
462 be_info_init_irg(irg);
464 dump(DUMP_INITIAL, irg, "prepared");
467 #define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while (0)
471 static const char *get_timer_name(be_timer_id_t id)
474 case T_ABI: return "abi";
475 case T_CODEGEN: return "codegen";
476 case T_RA_PREPARATION: return "ra_preparation";
477 case T_SCHED: return "sched";
478 case T_CONSTR: return "constr";
479 case T_FINISH: return "finish";
480 case T_EMIT: return "emit";
481 case T_VERIFY: return "verify";
482 case T_OTHER: return "other";
483 case T_HEIGHTS: return "heights";
484 case T_LIVE: return "live";
485 case T_EXECFREQ: return "execfreq";
486 case T_SSA_CONSTR: return "ssa_constr";
487 case T_RA_PROLOG: return "ra_prolog";
488 case T_RA_EPILOG: return "ra_epilog";
489 case T_RA_CONSTR: return "ra_constr";
490 case T_RA_SPILL: return "ra_spill";
491 case T_RA_SPILL_APPLY: return "ra_spill_apply";
492 case T_RA_COLOR: return "ra_color";
493 case T_RA_IFG: return "ra_ifg";
494 case T_RA_COPYMIN: return "ra_copymin";
495 case T_RA_SSA: return "ra_ssa";
496 case T_RA_OTHER: return "ra_other";
500 ir_timer_t *be_timers[T_LAST+1];
503 * The Firm backend main loop.
504 * Do architecture specific lowering for all graphs
505 * and call the architecture specific code generator.
507 * @param file_handle the file handle the output will be written to
508 * @param cup_name name of the compilation unit
510 static void be_main_loop(FILE *file_handle, const char *cup_name)
512 static const char suffix[] = ".prof";
514 int i, num_birgs, stat_active = 0;
516 char prof_filename[256];
518 ir_graph **irg_list, **backend_irg_list;
519 arch_env_t *arch_env;
521 be_timing = (be_options.timing == BE_TIME_ON);
524 for (i = 0; i < T_LAST+1; ++i) {
525 be_timers[i] = ir_timer_new();
529 be_init_env(&env, file_handle);
530 env.cup_name = cup_name;
535 arch_env = env.arch_env;
537 /* backend may provide an ordered list of irgs where code should be
539 irg_list = NEW_ARR_F(ir_graph *, 0);
540 backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
542 /* we might need 1 birg more for instrumentation constructor */
543 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
544 birgs = ALLOCAN(be_irg_t, num_birgs + 1);
548 /* First: initialize all birgs */
549 for (i = 0; i < num_birgs; ++i) {
550 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
551 initialize_birg(&birgs[i], irg, &env);
553 arch_env_handle_intrinsics(arch_env);
557 Get the filename for the profiling data.
558 Beware: '\0' is already included in sizeof(suffix)
560 memset(prof_filename, 0, sizeof(prof_filename));
561 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
562 strcat(prof_filename, suffix);
565 Next: Either instruments all irgs with profiling code
566 or try to read in profile data for current translation unit.
568 if (be_options.opt_profile) {
569 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
570 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
573 ir_profile_read(prof_filename);
576 #ifdef FIRM_STATISTICS
577 stat_active = stat_is_active();
578 #endif /* FIRM_STATISTICS */
581 for (i = 0; i < num_birgs; ++i) {
582 be_irg_t *birg = &birgs[i];
583 ir_graph *irg = birg->irg;
584 optimization_state_t state;
585 const arch_code_generator_if_t *cg_if;
587 /* set the current graph (this is important for several firm functions) */
588 current_ir_graph = irg;
591 stat_ev_ctx_push_fobj("bemain_irg", irg);
592 be_stat_ev("bemain_insns_start", be_count_insns(irg));
593 be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
596 /* stop and reset timers */
597 be_timer_push(T_OTHER);
599 /* Verify the initial graph */
600 be_timer_push(T_VERIFY);
601 if (be_options.verify_option == BE_VERIFY_WARN) {
602 irg_verify(irg, VERIFY_ENFORCE_SSA);
603 be_check_dominance(irg);
604 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
605 assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
606 assert(be_check_dominance(irg) && "Dominance verification failed");
608 be_timer_pop(T_VERIFY);
610 /* Get the code generator interface. */
611 cg_if = arch_env_get_code_generator_if(arch_env);
613 /* get a code generator for this graph. */
614 birg->cg = cg_if->init(irg);
616 /* some transformations need to be done before abi introduce */
617 assert(birg->cg->impl->before_abi == NULL || !arch_env->custom_abi);
618 arch_code_generator_before_abi(birg->cg);
620 /* implement the ABI conventions. */
621 be_timer_push(T_ABI);
622 be_abi_introduce(irg);
625 if (!arch_env->custom_abi) {
626 dump(DUMP_ABI, irg, "abi");
629 /* we have to do cfopt+remove_critical_edges as we can't have Bad-blocks
630 * or critical edges in the backend */
632 remove_critical_cf_edges(irg);
634 /* We often have dead code reachable through out-edges here. So for
635 * now we rebuild edges (as we need correct user count for code
637 edges_deactivate(irg);
640 dump(DUMP_PREPARED, irg, "before-code-selection");
642 if (be_options.verify_option == BE_VERIFY_WARN) {
643 be_check_dominance(irg);
644 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
645 assert(be_check_dominance(irg) && "Dominance verification failed");
648 /* perform codeselection */
649 be_timer_push(T_CODEGEN);
650 arch_code_generator_prepare_graph(birg->cg);
651 be_timer_pop(T_CODEGEN);
653 if (be_options.verify_option == BE_VERIFY_WARN) {
654 be_check_dominance(irg);
655 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
656 assert(be_check_dominance(irg) && "Dominance verification failed");
659 be_timer_push(T_EXECFREQ);
661 * Create execution frequencies from profile data or estimate some
663 if (ir_profile_has_data())
664 birg->exec_freq = ir_create_execfreqs_from_profile(irg);
666 /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
667 * optimize graph phase merges blocks in the x86 backend */
668 edges_deactivate(irg);
669 birg->exec_freq = compute_execfreq(irg, 10);
671 be_timer_pop(T_EXECFREQ);
674 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
675 /* be_live_chk_compare(irg); */
677 /* schedule the irg */
678 be_timer_push(T_SCHED);
679 switch (be_options.scheduler) {
681 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
689 #endif /* WITH_ILP */
691 be_timer_pop(T_SCHED);
693 dump(DUMP_SCHED, irg, "sched");
696 be_timer_push(T_VERIFY);
697 be_sched_verify(irg, be_options.verify_option);
698 be_timer_pop(T_VERIFY);
700 /* introduce patterns to assure constraints */
701 be_timer_push(T_CONSTR);
702 /* we switch off optimizations here, because they might cause trouble */
703 save_optimization_state(&state);
705 set_opt_normalize(0);
708 /* add Keeps for should_be_different constrained nodes */
709 /* beware: needs schedule due to usage of be_ssa_constr */
710 assure_constraints(irg);
711 be_timer_pop(T_CONSTR);
713 dump(DUMP_SCHED, irg, "assured");
715 /* stuff needs to be done after scheduling but before register allocation */
716 be_timer_push(T_RA_PREPARATION);
717 arch_code_generator_before_ra(birg->cg);
718 be_timer_pop(T_RA_PREPARATION);
720 /* connect all stack modifying nodes together (see beabi.c) */
721 be_timer_push(T_ABI);
722 be_abi_fix_stack_nodes(irg);
725 dump(DUMP_SCHED, irg, "fix_stack");
728 be_timer_push(T_VERIFY);
729 be_sched_verify(irg, be_options.verify_option);
730 be_timer_pop(T_VERIFY);
733 stat_ev_dbl("bemain_costs_before_ra",
734 be_estimate_irg_costs(irg, birg->exec_freq));
735 be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
736 be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
739 /* Do register allocation */
740 be_allocate_registers(irg);
742 #ifdef FIRM_STATISTICS
743 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
746 dump(DUMP_RA, irg, "ra");
748 /* let the code generator prepare the graph for emitter */
749 be_timer_push(T_FINISH);
750 arch_code_generator_after_ra(birg->cg);
751 be_timer_pop(T_FINISH);
753 /* fix stack offsets */
754 be_timer_push(T_ABI);
755 be_abi_fix_stack_nodes(irg);
756 be_remove_dead_nodes_from_schedule(irg);
757 be_abi_fix_stack_bias(irg);
760 dump(DUMP_SCHED, irg, "fix_stack_after_ra");
762 be_timer_push(T_FINISH);
763 arch_code_generator_finish(birg->cg);
764 be_timer_pop(T_FINISH);
766 dump(DUMP_FINAL, irg, "finish");
769 be_stat_ev("bemain_insns_finish", be_count_insns(irg));
770 be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
773 /* check schedule and register allocation */
774 be_timer_push(T_VERIFY);
775 if (be_options.verify_option == BE_VERIFY_WARN) {
776 irg_verify(irg, VERIFY_ENFORCE_SSA);
777 be_check_dominance(irg);
778 be_verify_schedule(irg);
779 be_verify_register_allocation(irg);
780 } else if (be_options.verify_option == BE_VERIFY_ASSERT) {
781 assert(irg_verify(irg, VERIFY_ENFORCE_SSA) && "irg verification failed");
782 assert(be_check_dominance(irg) && "Dominance verification failed");
783 assert(be_verify_schedule(irg) && "Schedule verification failed");
784 assert(be_verify_register_allocation(irg)
785 && "register allocation verification failed");
788 be_timer_pop(T_VERIFY);
790 /* emit assembler code */
791 be_timer_push(T_EMIT);
792 arch_code_generator_done(birg->cg);
793 be_timer_pop(T_EMIT);
795 dump(DUMP_FINAL, irg, "end");
797 be_timer_push(T_ABI);
801 restore_optimization_state(&state);
803 be_timer_pop(T_OTHER);
807 if (stat_ev_enabled) {
808 for (t = 0; t < T_LAST+1; ++t) {
810 snprintf(buf, sizeof(buf), "bemain_time_%s",
812 stat_ev_dbl(buf, ir_timer_elapsed_usec(be_timers[i]));
815 printf("==>> IRG %s <<==\n",
816 get_entity_name(get_irg_entity(irg)));
817 for (t = 0; t < T_LAST+1; ++t) {
818 double val = ir_timer_elapsed_usec(be_timers[t]) / 1000.0;
819 printf("%-20s: %8.3lf msec\n", get_timer_name(t), val);
822 for (t = 0; t < T_LAST+1; ++t) {
823 ir_timer_stop(be_timers[t]);
824 ir_timer_reset(be_timers[t]);
829 stat_ev_ctx_pop("bemain_irg");
837 /* Main interface to the frontend. */
838 void be_main(FILE *file_handle, const char *cup_name)
840 ir_timer_t *t = NULL;
842 /* The user specified another config file to read. do that now. */
843 if (config_file[0] != '\0') {
844 FILE *f = fopen(config_file, "rt");
847 lc_opt_from_file(config_file, f, NULL);
850 fprintf(stderr, "Warning: Cannot open config file '%s'\n", config_file);
854 if (be_options.timing == BE_TIME_ON) {
857 if (ir_timer_enter_high_priority()) {
858 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
861 ir_timer_reset_and_start(t);
864 #ifdef FIRM_STATISTICS
865 if (be_options.statev) {
866 const char *dot = strrchr(cup_name, '.');
867 const char *pos = dot ? dot : cup_name + strlen(cup_name);
868 char *buf = ALLOCAN(char, pos - cup_name + 1);
869 strncpy(buf, cup_name, pos - cup_name);
870 buf[pos - cup_name] = '\0';
872 be_options.statev = 1;
873 stat_ev_begin(buf, be_options.filtev);
874 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
878 be_main_loop(file_handle, cup_name);
880 if (be_options.timing == BE_TIME_ON) {
882 ir_timer_leave_high_priority();
884 stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
886 double val = ir_timer_elapsed_usec(t) / 1000.0;
887 printf("%-20s: %8.3lf msec\n", "BEMAINLOOP", val);
891 #ifdef FIRM_STATISTICS
892 if (be_options.statev) {
893 stat_ev_ctx_pop("bemain_compilation_unit");
899 static int do_lower_for_target(ir_prog *irp, void *context)
901 const backend_params *be_params = be_get_backend_param();
902 be_params->lower_for_target();
908 ir_prog_pass_t *lower_for_target_pass(const char *name)
910 ir_prog_pass_t *pass = XMALLOCZ(ir_prog_pass_t);
911 return def_prog_pass_constructor(pass,
912 name ? name : "lower_for_target",
913 do_lower_for_target);
916 unsigned be_put_ignore_regs(const ir_graph *irg,
917 const arch_register_class_t *cls, bitset_t *bs)
920 bs = bitset_alloca(cls->n_regs);
922 bitset_clear_all(bs);
924 assert(bitset_size(bs) == cls->n_regs);
925 arch_put_non_ignore_regs(cls, bs);
927 be_abi_put_ignore_regs(be_get_irg_abi(irg), cls, bs);
929 return bitset_popcount(bs);