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"
44 #include "iredges_t.h"
49 #include "iroptimize.h"
52 #include "irprofile.h"
60 #include "besched_t.h"
61 #include "belistsched.h"
64 #include "bechordal_t.h"
66 #include "beifg_impl.h"
67 #include "becopyopt.h"
68 #include "becopystat.h"
69 #include "bessadestr.h"
72 #include "beschedmris.h"
75 #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_VRFY_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 vrfy_items[] = {
124 { "off", BE_VRFY_OFF },
125 { "warn", BE_VRFY_WARN },
126 { "assert", BE_VRFY_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 vrfy_var = {
144 &be_options.vrfy_option, vrfy_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", &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;
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(isa_if, &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(isa_if, 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) {
335 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
336 if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
337 lc_opt_print_help_for_entry(be_grp, '-', stdout);
340 return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
343 /** The be parameters returned by default, all off. */
344 static const backend_params be_params = {
345 0, /* need dword lowering */
346 0, /* don't support inline assembler yet */
347 0, /* no immediate floating point mode. */
348 NULL, /* no additional opcodes */
349 NULL, /* will be set later */
350 NULL, /* but yet no creator function */
351 NULL, /* context for create_intrinsic_fkt */
352 NULL, /* no if conversion settings */
353 NULL /* no immediate fp mode */
356 /* Perform schedule verification if requested. */
357 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
358 if (vrfy_opt == BE_VRFY_WARN) {
359 be_verify_schedule(birg);
360 } else if (vrfy_opt == BE_VRFY_ASSERT) {
361 assert(be_verify_schedule(birg) && "Schedule verification failed.");
365 /* Initialize the Firm backend. Must be run first in init_firm()! */
366 void firm_be_init(void)
372 /* Finalize the Firm backend. */
373 void firm_be_finish(void)
378 /* Returns the backend parameter */
379 const backend_params *be_get_backend_param(void)
381 if (isa_if->get_params)
382 return isa_if->get_params();
387 * Initializes the main environment for the backend.
389 * @param env an empty environment
390 * @param file_handle the file handle where the output will be written to
392 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
394 memset(env, 0, sizeof(*env));
395 env->options = &be_options;
396 env->ent_trampoline_map = pmap_create();
397 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
398 env->ent_pic_symbol_map = pmap_create();
399 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
401 remove_irp_type(env->pic_trampolines_type);
402 remove_irp_type(env->pic_symbols_type);
403 set_class_final(env->pic_trampolines_type, 1);
405 memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
406 env->arch_env = arch_env_init(isa_if, file_handle, env);
408 be_phi_handler_new();
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);
421 be_phi_handler_free();
423 pmap_destroy(env->ent_trampoline_map);
424 pmap_destroy(env->ent_pic_symbol_map);
425 free_type(env->pic_trampolines_type);
426 free_type(env->pic_symbols_type);
430 * A wrapper around a firm dumper. Dumps only, if
433 * @param mask a bitmask containing the reason what will be dumped
434 * @param irg the IR graph to dump
435 * @param suffix the suffix for the dumper
436 * @param dumper the dumper to be called
438 static void dump(int mask, ir_graph *irg, const char *suffix,
439 void (*dumper)(ir_graph *, const char *))
441 if(be_options.dump_flags & mask)
442 be_dump(irg, suffix, dumper);
446 * Prepare a backend graph for code generation and initialize its birg
448 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
450 memset(birg, 0, sizeof(*birg));
452 birg->main_env = env;
454 edges_deactivate_kind(irg, EDGE_KIND_DEP);
455 edges_activate_kind(irg, EDGE_KIND_DEP);
457 dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
459 /* set the current graph (this is important for several firm functions) */
460 current_ir_graph = irg;
462 /* Normalize proj nodes. */
463 normalize_proj_nodes(irg);
465 /* we do this before critical edge split. As this produces less returns,
466 because sometimes (= 164.gzip) multiple returns are slower */
467 normalize_n_returns(irg);
469 /* Remove critical edges */
470 remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
472 /* Ensure, that the ir_edges are computed. */
475 set_irg_phase_state(irg, phase_backend);
476 be_info_init_irg(irg);
478 dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
481 #define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while(0)
485 ir_timer_t *t_codegen;
487 ir_timer_t *t_constr;
488 ir_timer_t *t_finish;
491 ir_timer_t *t_verify;
492 ir_timer_t *t_heights;
494 ir_timer_t *t_execfreq;
495 ir_timer_t *t_ssa_constr;
496 ir_timer_t *t_ra_constr;
497 ir_timer_t *t_ra_prolog;
498 ir_timer_t *t_ra_epilog;
499 ir_timer_t *t_ra_spill;
500 ir_timer_t *t_ra_spill_apply;
501 ir_timer_t *t_ra_color;
502 ir_timer_t *t_ra_ifg;
503 ir_timer_t *t_ra_copymin;
504 ir_timer_t *t_ra_ssa;
505 ir_timer_t *t_ra_other;
508 * The Firm backend main loop.
509 * Do architecture specific lowering for all graphs
510 * and call the architecture specific code generator.
512 * @param file_handle the file handle the output will be written to
513 * @param cup_name name of the compilation unit
515 static void be_main_loop(FILE *file_handle, const char *cup_name)
519 char prof_filename[256];
520 static const char suffix[] = ".prof";
523 ir_graph **irg_list, **backend_irg_list;
524 arch_env_t *arch_env;
526 be_timing = (be_options.timing == BE_TIME_ON);
529 t_abi = ir_timer_register("bemain_time_beabi", "be abi introduction");
530 t_codegen = ir_timer_register("bemain_time_codegen", "codegeneration");
531 t_sched = ir_timer_register("bemain_time_sched", "scheduling");
532 t_constr = ir_timer_register("bemain_time_constr", "assure constraints");
533 t_finish = ir_timer_register("bemain_time_finish", "graph finish");
534 t_emit = ir_timer_register("bemain_time_emiter", "code emiter");
535 t_verify = ir_timer_register("bemain_time_verify", "graph verification");
536 t_other = ir_timer_register("bemain_time_other", "other");
537 t_heights = ir_timer_register("bemain_time_heights", "heights");
538 t_live = ir_timer_register("bemain_time_liveness", "be liveness");
539 t_execfreq = ir_timer_register("bemain_time_execfreq", "execfreq");
540 t_ssa_constr = ir_timer_register("bemain_time_ssa_constr", "ssa reconstruction");
541 t_ra_prolog = ir_timer_register("bemain_time_ra_prolog", "regalloc prolog");
542 t_ra_epilog = ir_timer_register("bemain_time_ra_epilog", "regalloc epilog");
543 t_ra_constr = ir_timer_register("bemain_time_ra_constr", "regalloc constraints");
544 t_ra_spill = ir_timer_register("bemain_time_ra_spill", "spiller");
546 = ir_timer_register("bemain_time_ra_spill_apply", "apply spills");
547 t_ra_color = ir_timer_register("bemain_time_ra_color", "graph coloring");
548 t_ra_ifg = ir_timer_register("bemain_time_ra_ifg", "interference graph");
549 t_ra_copymin = ir_timer_register("bemain_time_ra_copymin", "copy minimization");
550 t_ra_ssa = ir_timer_register("bemain_time_ra_ssadestr", "ssa destruction");
551 t_ra_other = ir_timer_register("bemain_time_ra_other", "regalloc other");
554 be_init_env(&env, file_handle);
555 env.cup_name = cup_name;
560 arch_env = env.arch_env;
562 /* backend may provide an ordered list of irgs where code should be
564 irg_list = NEW_ARR_F(ir_graph *, 0);
565 backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
567 /* we might need 1 birg more for instrumentation constructor */
568 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
569 birgs = ALLOCAN(be_irg_t, num_birgs + 1);
573 /* First: initialize all birgs */
574 for(i = 0; i < num_birgs; ++i) {
575 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
576 initialize_birg(&birgs[i], irg, &env);
578 arch_env_handle_intrinsics(arch_env);
582 Get the filename for the profiling data.
583 Beware: '\0' is already included in sizeof(suffix)
585 memset(prof_filename, 0, sizeof(prof_filename));
586 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
587 strcat(prof_filename, suffix);
590 Next: Either instruments all irgs with profiling code
591 or try to read in profile data for current translation unit.
593 if (be_options.opt_profile) {
594 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
595 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
598 ir_profile_read(prof_filename);
602 for (i = 0; i < num_birgs; ++i) {
603 be_irg_t *birg = &birgs[i];
604 ir_graph *irg = birg->irg;
605 optimization_state_t state;
606 const arch_code_generator_if_t *cg_if;
608 /* set the current graph (this is important for several firm functions) */
609 current_ir_graph = irg;
611 /* reset the phi handler. */
612 be_phi_handler_reset();
615 stat_ev_ctx_push_fobj("bemain_irg", irg);
616 be_stat_ev("bemain_insns_start", be_count_insns(irg));
617 be_stat_ev("bemain_blocks_start", be_count_blocks(irg));
620 /* stop and reset timers */
621 BE_TIMER_PUSH(t_other); /* t_other */
623 /* Verify the initial graph */
624 BE_TIMER_PUSH(t_verify);
625 if (be_options.vrfy_option == BE_VRFY_WARN) {
626 irg_verify(irg, VRFY_ENFORCE_SSA);
627 be_check_dominance(irg);
628 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
629 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
630 assert(be_check_dominance(irg) && "Dominance verification failed");
632 BE_TIMER_POP(t_verify);
634 /* Get the code generator interface. */
635 cg_if = arch_env_get_code_generator_if(arch_env);
637 /* get a code generator for this graph. */
638 birg->cg = cg_if->init(birg);
640 /* some transformations need to be done before abi introduce */
641 arch_code_generator_before_abi(birg->cg);
643 /* implement the ABI conventions. */
644 BE_TIMER_PUSH(t_abi);
645 birg->abi = be_abi_introduce(birg);
648 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
650 if (be_options.vrfy_option == BE_VRFY_WARN) {
651 be_check_dominance(irg);
652 be_verify_out_edges(irg);
653 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
654 assert(be_verify_out_edges(irg));
655 assert(be_check_dominance(irg) && "Dominance verification failed");
659 BE_TIMER_PUSH(t_codegen);
660 arch_code_generator_prepare_graph(birg->cg);
661 BE_TIMER_POP(t_codegen);
663 /* reset the phi handler. */
664 be_phi_handler_reset();
666 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
668 if (be_options.vrfy_option == BE_VRFY_WARN) {
669 be_check_dominance(irg);
670 be_verify_out_edges(irg);
671 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
672 assert(be_verify_out_edges(irg));
673 assert(be_check_dominance(irg) && "Dominance verification failed");
676 BE_TIMER_PUSH(t_execfreq);
678 * Create execution frequencies from profile data or estimate some
680 if (ir_profile_has_data())
681 birg->exec_freq = ir_create_execfreqs_from_profile(irg);
683 /* TODO: edges are corrupt for EDGE_KIND_BLOCK after the local
684 * optimize graph phase merges blocks in the x86 backend */
685 edges_deactivate(irg);
686 birg->exec_freq = compute_execfreq(irg, 10);
688 BE_TIMER_POP(t_execfreq);
691 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
692 /* be_live_chk_compare(birg); */
694 /* schedule the irg */
695 BE_TIMER_PUSH(t_sched);
696 switch (be_options.scheduler) {
698 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
700 list_sched(birg, &be_options);
704 be_ilp_sched(birg, &be_options);
706 #endif /* WITH_ILP */
708 BE_TIMER_POP(t_sched);
710 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
713 BE_TIMER_PUSH(t_verify);
714 be_sched_vrfy(birg, be_options.vrfy_option);
715 BE_TIMER_POP(t_verify);
717 /* introduce patterns to assure constraints */
718 BE_TIMER_PUSH(t_constr);
719 /* we switch off optimizations here, because they might cause trouble */
720 save_optimization_state(&state);
722 set_opt_normalize(0);
725 /* add Keeps for should_be_different constrained nodes */
726 /* beware: needs schedule due to usage of be_ssa_constr */
727 assure_constraints(birg);
728 BE_TIMER_POP(t_constr);
730 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
732 /* stuff needs to be done after scheduling but before register allocation */
733 BE_TIMER_PUSH(t_codegen);
734 arch_code_generator_before_ra(birg->cg);
735 BE_TIMER_POP(t_codegen);
737 /* connect all stack modifying nodes together (see beabi.c) */
738 BE_TIMER_PUSH(t_abi);
739 be_abi_fix_stack_nodes(birg->abi);
742 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
745 BE_TIMER_PUSH(t_verify);
746 be_sched_vrfy(birg, be_options.vrfy_option);
747 BE_TIMER_POP(t_verify);
750 stat_ev_dbl("bemain_costs_before_ra",
751 be_estimate_irg_costs(irg, birg->exec_freq));
752 be_stat_ev("bemain_insns_before_ra", be_count_insns(irg));
753 be_stat_ev("bemain_blocks_before_ra", be_count_blocks(irg));
756 /* Do register allocation */
757 be_allocate_registers(birg);
759 #ifdef FIRM_STATISTICS
760 stat_ev_dbl("bemain_costs_before_ra", be_estimate_irg_costs(irg, birg->exec_freq));
763 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
765 /* let the code generator prepare the graph for emitter */
766 BE_TIMER_PUSH(t_finish);
767 arch_code_generator_after_ra(birg->cg);
768 BE_TIMER_POP(t_finish);
770 /* fix stack offsets */
771 BE_TIMER_PUSH(t_abi);
772 be_abi_fix_stack_nodes(birg->abi);
773 be_remove_dead_nodes_from_schedule(birg);
774 be_abi_fix_stack_bias(birg->abi);
777 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
779 BE_TIMER_PUSH(t_finish);
780 arch_code_generator_finish(birg->cg);
781 BE_TIMER_POP(t_finish);
783 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
786 be_stat_ev("bemain_insns_finish", be_count_insns(irg));
787 be_stat_ev("bemain_blocks_finish", be_count_blocks(irg));
790 /* check schedule and register allocation */
791 BE_TIMER_PUSH(t_verify);
792 if (be_options.vrfy_option == BE_VRFY_WARN) {
793 irg_verify(irg, VRFY_ENFORCE_SSA);
794 be_check_dominance(irg);
795 be_verify_out_edges(irg);
796 be_verify_schedule(birg);
797 be_verify_register_allocation(birg);
798 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
799 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
800 assert(be_verify_out_edges(irg) && "out edge verification failed");
801 assert(be_check_dominance(irg) && "Dominance verification failed");
802 assert(be_verify_schedule(birg) && "Schedule verification failed");
803 assert(be_verify_register_allocation(birg)
804 && "register allocation verification failed");
807 BE_TIMER_POP(t_verify);
809 /* emit assembler code */
810 BE_TIMER_PUSH(t_emit);
811 arch_code_generator_done(birg->cg);
812 BE_TIMER_POP(t_emit);
814 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
816 BE_TIMER_PUSH(t_abi);
817 be_abi_free(birg->abi);
820 restore_optimization_state(&state);
822 BE_TIMER_POP(t_other);
824 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
826 #define LC_EMIT(timer) \
828 stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer)); \
830 printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
832 STOP_AND_RESET_TIMER(timer);
837 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
844 LC_EMIT(t_ssa_constr);
847 LC_EMIT(t_ra_prolog);
849 LC_EMIT(t_ra_spill_apply);
850 LC_EMIT(t_ra_constr);
853 LC_EMIT(t_ra_copymin);
855 LC_EMIT(t_ra_epilog);
865 stat_ev_ctx_pop("bemain_irg");
873 /* Main interface to the frontend. */
874 void be_main(FILE *file_handle, const char *cup_name)
876 ir_timer_t *t = NULL;
878 /* The user specified another config file to read. do that now. */
879 if (config_file[0] != '\0') {
880 FILE *f = fopen(config_file, "rt");
883 lc_opt_from_file(config_file, f, NULL);
886 fprintf(stderr, "Warning: Cannot open config file '%s'\n", config_file);
890 if (be_options.timing == BE_TIME_ON) {
891 t = ir_timer_register("bemain", "measure complete bemain loop");
893 if (ir_timer_enter_high_priority()) {
894 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
897 ir_timer_reset_and_start(t);
900 #ifdef FIRM_STATISTICS
901 if (be_options.statev) {
902 const char *dot = strrchr(cup_name, '.');
903 const char *pos = dot ? dot : cup_name + strlen(cup_name);
904 char *buf = ALLOCAN(char, pos - cup_name + 1);
905 strncpy(buf, cup_name, pos - cup_name);
906 buf[pos - cup_name] = '\0';
908 be_options.statev = 1;
909 stat_ev_begin(buf, be_options.filtev);
910 stat_ev_ctx_push_str("bemain_compilation_unit", cup_name);
914 /* never build code for pseudo irgs */
915 set_visit_pseudo_irgs(0);
919 be_main_loop(file_handle, cup_name);
921 if (be_options.timing == BE_TIME_ON) {
923 ir_timer_leave_high_priority();
925 stat_ev_dbl("bemain_backend_time", ir_timer_elapsed_msec(t));
927 printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
931 #ifdef FIRM_STATISTICS
932 if (be_options.statev) {
933 stat_ev_ctx_pop("bemain_compilation_unit");
939 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
942 bs = bitset_alloca(cls->n_regs);
944 bitset_clear_all(bs);
946 assert(bitset_size(bs) == cls->n_regs);
947 arch_put_non_ignore_regs(cls, bs);
949 be_abi_put_ignore_regs(birg->abi, cls, bs);
951 return bitset_popcnt(bs);