2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Main Backend driver.
23 * @author Sebastian Hack
35 #include "lc_opts_enum.h"
46 #include "iredges_t.h"
51 #include "iroptimize.h"
54 #include "irprofile.h"
62 #include "besched_t.h"
63 #include "belistsched.h"
66 #include "bechordal_t.h"
68 #include "beifg_impl.h"
69 #include "becopyopt.h"
70 #include "becopystat.h"
71 #include "bessadestr.h"
74 #include "beschedmris.h"
77 #include "be_dbgout.h"
80 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
83 #include "beilpsched.h"
86 /* options visible for anyone */
87 static be_options_t be_options = {
88 DUMP_NONE, /* dump flags */
89 BE_TIME_OFF, /* no timing */
90 0, /* no opt profile */
91 0, /* try to omit frame pointer */
92 0, /* try to omit leaf frame pointer */
93 0, /* create PIC code */
94 0, /* create gprof compatible profiling code */
95 BE_VRFY_WARN, /* verification level: warn */
96 BE_SCHED_LIST, /* scheduler: list scheduler */
97 "linux", /* target OS name */
98 "i44pc52.info.uni-karlsruhe.de", /* ilp server */
99 "cplex", /* ilp solver */
100 0, /* enable statistic event dumping */
101 "", /* print stat events */
105 static char config_file[256] = { 0 };
107 /* back end instruction set architecture to use */
108 static const arch_isa_if_t *isa_if = NULL;
110 /* possible dumping options */
111 static const lc_opt_enum_mask_items_t dump_items[] = {
112 { "none", DUMP_NONE },
113 { "initial", DUMP_INITIAL },
115 { "sched", DUMP_SCHED },
116 { "prepared", DUMP_PREPARED },
117 { "regalloc", DUMP_RA },
118 { "final", DUMP_FINAL },
120 { "all", 2 * DUMP_BE - 1 },
124 /* verify options. */
125 static const lc_opt_enum_int_items_t vrfy_items[] = {
126 { "off", BE_VRFY_OFF },
127 { "warn", BE_VRFY_WARN },
128 { "assert", BE_VRFY_ASSERT },
132 /* scheduling options. */
133 static const lc_opt_enum_int_items_t sched_items[] = {
134 { "list", BE_SCHED_LIST },
136 { "ilp", BE_SCHED_ILP },
137 #endif /* WITH_ILP */
141 static lc_opt_enum_mask_var_t dump_var = {
142 &be_options.dump_flags, dump_items
145 static lc_opt_enum_int_var_t vrfy_var = {
146 &be_options.vrfy_option, vrfy_items
149 static lc_opt_enum_int_var_t sched_var = {
150 &be_options.scheduler, sched_items
153 static const lc_opt_table_entry_t be_main_options[] = {
154 LC_OPT_ENT_STR ("config", "read another config file containing backend options", config_file, sizeof(config_file)),
155 LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var),
156 LC_OPT_ENT_BOOL ("omitfp", "omit frame pointer", &be_options.omit_fp),
157 LC_OPT_ENT_BOOL ("omitleaffp", "omit frame pointer in leaf routines", &be_options.omit_leaf_fp),
158 LC_OPT_ENT_BOOL ("pic", "create PIC code", &be_options.pic),
159 LC_OPT_ENT_BOOL ("gprof", "create gprof profiling code", &be_options.gprof),
160 LC_OPT_ENT_ENUM_PTR ("vrfy", "verify the backend irg", &vrfy_var),
161 LC_OPT_ENT_BOOL ("time", "get backend timing statistics", &be_options.timing),
162 LC_OPT_ENT_BOOL ("profile", "instrument the code for execution count profiling", &be_options.opt_profile),
163 LC_OPT_ENT_ENUM_PTR ("sched", "select a scheduler", &sched_var),
164 LC_OPT_ENT_STR ("os", "specify target operating system", &be_options.target_os, sizeof(be_options.target_os)),
165 #ifdef FIRM_STATISTICS
166 LC_OPT_ENT_BOOL ("statev", "dump statistic events", &be_options.statev),
167 LC_OPT_ENT_STR ("filtev", "filter for stat events (regex if support is active", &be_options.filtev, sizeof(be_options.filtev)),
171 LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
172 LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
173 #endif /* WITH_ILP */
177 static be_module_list_entry_t *isa_ifs = NULL;
180 unsigned short asm_constraint_flags[256];
182 void be_init_default_asm_constraint_flags(void)
184 asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
185 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
186 asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
187 | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
188 asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
189 | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
190 asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
192 asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
193 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
194 asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
195 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
197 asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
198 asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
199 asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
200 asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
201 asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
202 asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
203 asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
204 asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
205 asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
206 asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
207 asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
208 asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
209 asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
210 asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
212 asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
213 asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
214 asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
215 asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
216 asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
218 asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
219 asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
220 asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
221 asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
222 asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
223 asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
224 asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
225 asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
226 asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
227 asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
228 asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
230 asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
231 | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
232 | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
234 /* these should have been catched by the parsing code already */
235 asm_constraint_flags['#'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
236 asm_constraint_flags['*'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
237 asm_constraint_flags[' '] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
238 asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
239 asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
240 asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
243 asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
245 asm_constraint_flags_t flags = 0;
247 asm_constraint_flags_t tflags;
249 for (c = constraint; *c != '\0'; ++c) {
252 /* 'comment' stuff */
253 while(*c != 0 && *c != ',')
257 /* 'comment' character */
266 tflags = asm_constraint_flags[(int) *c];
270 flags |= isa_if->parse_asm_constraint(isa_if, &c);
276 if ( ((flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)
277 && (flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE))
278 || ((flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ
279 && (flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)))) {
280 flags |= ASM_CONSTRAINT_FLAG_INVALID;
282 if (! (flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ
283 | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
284 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
285 | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ))) {
286 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
292 bool 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(isa_if, 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;
325 be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
326 lc_opt_add_table(be_grp, be_main_options);
328 be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
329 &isa_ifs, (void**) &isa_if);
332 /* Parse one argument. */
333 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(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 0, /* no immediate floating point mode. */
347 NULL, /* no additional opcodes */
348 NULL, /* will be set later */
349 NULL, /* but yet no creator function */
350 NULL, /* context for create_intrinsic_fkt */
351 NULL, /* no if conversion settings */
352 NULL /* no immediate fp mode */
355 /* Perform schedule verification if requested. */
356 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
357 if (vrfy_opt == BE_VRFY_WARN) {
358 be_verify_schedule(birg);
359 } else if (vrfy_opt == BE_VRFY_ASSERT) {
360 assert(be_verify_schedule(birg) && "Schedule verification failed.");
364 /* Initialize the Firm backend. Must be run first in init_firm()! */
365 void firm_be_init(void)
371 /* Returns the backend parameter */
372 const backend_params *be_get_backend_param(void)
374 if (isa_if->get_params)
375 return isa_if->get_params();
380 * Initializes the main environment for the backend.
382 * @param env an empty environment
383 * @param file_handle the file handle where the output will be written to
385 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
387 memset(env, 0, sizeof(*env));
388 env->options = &be_options;
389 env->ent_trampoline_map = pmap_create();
390 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
391 env->ent_pic_symbol_map = pmap_create();
392 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
394 remove_irp_type(env->pic_trampolines_type);
395 remove_irp_type(env->pic_symbols_type);
396 set_class_final(env->pic_trampolines_type, 1);
398 memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
399 env->arch_env = arch_env_init(isa_if, file_handle, env);
401 be_phi_handler_new(env);
408 * Called when the be_main_env_t can be destroyed.
410 static void be_done_env(be_main_env_t *env)
412 arch_env_done(env->arch_env);
414 be_phi_handler_free();
416 pmap_destroy(env->ent_trampoline_map);
417 pmap_destroy(env->ent_pic_symbol_map);
418 free_type(env->pic_trampolines_type);
419 free_type(env->pic_symbols_type);
423 * A wrapper around a firm dumper. Dumps only, if
426 * @param mask a bitmask containing the reason what will be dumped
427 * @param irg the IR graph to dump
428 * @param suffix the suffix for the dumper
429 * @param dumper the dumper to be called
431 static void dump(int mask, ir_graph *irg, const char *suffix,
432 void (*dumper)(ir_graph *, const char *))
434 if(be_options.dump_flags & mask)
435 be_dump(irg, suffix, dumper);
439 * Prepare a backend graph for code generation and initialize its birg
441 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
443 memset(birg, 0, sizeof(*birg));
445 birg->main_env = env;
447 edges_deactivate_kind(irg, EDGE_KIND_DEP);
448 edges_activate_kind(irg, EDGE_KIND_DEP);
450 dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
452 be_stat_init_irg(env->arch_env, irg);
453 be_do_stat_nodes(irg, "01 Begin");
455 /* set the current graph (this is important for several firm functions) */
456 current_ir_graph = irg;
458 /* Normalize proj nodes. */
459 normalize_proj_nodes(irg);
461 /* we do this before critical edge split. As this produces less returns,
462 because sometimes (= 164.gzip) multiple returns are slower */
463 normalize_n_returns(irg);
465 /* Remove critical edges */
466 remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
468 /* Ensure, that the ir_edges are computed. */
471 set_irg_phase_state(irg, phase_backend);
473 dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
476 #define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while(0)
480 ir_timer_t *t_codegen;
482 ir_timer_t *t_constr;
483 ir_timer_t *t_finish;
486 ir_timer_t *t_verify;
487 ir_timer_t *t_heights;
489 ir_timer_t *t_execfreq;
490 ir_timer_t *t_ssa_constr;
491 ir_timer_t *t_ra_constr;
492 ir_timer_t *t_ra_prolog;
493 ir_timer_t *t_ra_epilog;
494 ir_timer_t *t_ra_spill;
495 ir_timer_t *t_ra_spill_apply;
496 ir_timer_t *t_ra_color;
497 ir_timer_t *t_ra_ifg;
498 ir_timer_t *t_ra_copymin;
499 ir_timer_t *t_ra_ssa;
500 ir_timer_t *t_ra_other;
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)
514 char prof_filename[256];
515 static const char suffix[] = ".prof";
518 ir_graph **irg_list, **backend_irg_list;
519 arch_env_t *arch_env;
521 be_timing = (be_options.timing == BE_TIME_ON);
524 t_abi = ir_timer_register("time_beabi", "be abi introduction");
525 t_codegen = ir_timer_register("time_codegen", "codegeneration");
526 t_sched = ir_timer_register("time_sched", "scheduling");
527 t_constr = ir_timer_register("time_constr", "assure constraints");
528 t_finish = ir_timer_register("time_finish", "graph finish");
529 t_emit = ir_timer_register("time_emiter", "code emiter");
530 t_verify = ir_timer_register("time_verify", "graph verification");
531 t_other = ir_timer_register("time_other", "other");
532 t_heights = ir_timer_register("time_heights", "heights");
533 t_live = ir_timer_register("time_liveness", "be liveness");
534 t_execfreq = ir_timer_register("time_execfreq", "execfreq");
535 t_ssa_constr = ir_timer_register("time_ssa_constr", "ssa reconstruction");
536 t_ra_prolog = ir_timer_register("time_ra_prolog", "regalloc prolog");
537 t_ra_epilog = ir_timer_register("time_ra_epilog", "regalloc epilog");
538 t_ra_constr = ir_timer_register("time_ra_constr", "regalloc constraints");
539 t_ra_spill = ir_timer_register("time_ra_spill", "spiller");
541 = ir_timer_register("time_ra_spill_apply", "apply spills");
542 t_ra_color = ir_timer_register("time_ra_color", "graph coloring");
543 t_ra_ifg = ir_timer_register("time_ra_ifg", "interference graph");
544 t_ra_copymin = ir_timer_register("time_ra_copymin", "copy minimization");
545 t_ra_ssa = ir_timer_register("time_ra_ssadestr", "ssa destruction");
546 t_ra_other = ir_timer_register("time_ra_other", "regalloc other");
549 be_init_env(&env, file_handle);
550 env.cup_name = cup_name;
555 arch_env = env.arch_env;
557 /* backend may provide an ordered list of irgs where code should be generated for */
558 irg_list = NEW_ARR_F(ir_graph *, 0);
559 backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
561 /* we might need 1 birg more for instrumentation constructor */
562 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
563 birgs = alloca(sizeof(birgs[0]) * (num_birgs + 1));
565 /* First: initialize all birgs */
566 for(i = 0; i < num_birgs; ++i) {
567 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
568 initialize_birg(&birgs[i], irg, &env);
573 Get the filename for the profiling data.
574 Beware: '\0' is already included in sizeof(suffix)
576 memset(prof_filename, 0, sizeof(prof_filename));
577 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
578 strcat(prof_filename, suffix);
581 Next: Either instruments all irgs with profiling code
582 or try to read in profile data for current translation unit.
584 if (be_options.opt_profile) {
585 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
586 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
589 ir_profile_read(prof_filename);
593 for (i = 0; i < num_birgs; ++i) {
594 be_irg_t *birg = &birgs[i];
595 ir_graph *irg = birg->irg;
596 optimization_state_t state;
597 const arch_code_generator_if_t *cg_if;
599 /* set the current graph (this is important for several firm functions) */
600 current_ir_graph = irg;
604 unsigned percent = 100*i/num_birgs;
605 ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
608 be_sched_init_phase(irg);
610 /* reset the phi handler. */
611 be_phi_handler_reset();
613 stat_ev_ctx_push_fobj("bemain_irg", irg);
615 /* stop and reset timers */
616 BE_TIMER_PUSH(t_other); /* t_other */
618 /* Verify the initial graph */
619 BE_TIMER_PUSH(t_verify);
620 if (be_options.vrfy_option == BE_VRFY_WARN) {
621 irg_verify(irg, VRFY_ENFORCE_SSA);
622 be_check_dominance(irg);
623 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
624 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
625 assert(be_check_dominance(irg) && "Dominance verification failed");
627 BE_TIMER_POP(t_verify);
629 /* Get the code generator interface. */
630 cg_if = arch_env_get_code_generator_if(arch_env);
632 /* get a code generator for this graph. */
633 birg->cg = cg_if->init(birg);
635 /* some transformations need to be done before abi introduce */
636 arch_code_generator_before_abi(birg->cg);
638 /* implement the ABI conventions. */
639 BE_TIMER_PUSH(t_abi);
640 birg->abi = be_abi_introduce(birg);
643 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
644 be_do_stat_nodes(irg, "02 Abi");
646 if (be_options.vrfy_option == BE_VRFY_WARN) {
647 be_check_dominance(irg);
648 be_verify_out_edges(irg);
649 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
650 assert(be_verify_out_edges(irg));
651 assert(be_check_dominance(irg) && "Dominance verification failed");
655 stat_ev_ctx_push_str("bemain_phase", "prepare");
656 BE_TIMER_PUSH(t_codegen);
657 arch_code_generator_prepare_graph(birg->cg);
658 BE_TIMER_POP(t_codegen);
659 stat_ev_ctx_pop("bemain_phase");
661 /* reset the phi handler. */
662 be_phi_handler_reset();
664 be_do_stat_nodes(irg, "03 Prepare");
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 birg->exec_freq = compute_execfreq(irg, 10);
684 BE_TIMER_POP(t_execfreq);
687 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
688 /* be_live_chk_compare(birg); */
690 /* let backend prepare scheduling */
691 stat_ev_ctx_push_str("bemain_phase", "before_sched");
692 BE_TIMER_PUSH(t_codegen);
693 arch_code_generator_before_sched(birg->cg);
694 BE_TIMER_POP(t_codegen);
695 stat_ev_ctx_pop("bemain_phase");
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);
703 list_sched(birg, &be_options);
707 be_ilp_sched(birg, &be_options);
709 #endif /* WITH_ILP */
711 BE_TIMER_POP(t_sched);
713 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
716 BE_TIMER_PUSH(t_verify);
717 be_sched_vrfy(birg, be_options.vrfy_option);
718 BE_TIMER_POP(t_verify);
720 be_do_stat_nodes(irg, "04 Schedule");
722 /* introduce patterns to assure constraints */
723 BE_TIMER_PUSH(t_constr);
724 /* we switch off optimizations here, because they might cause trouble */
725 save_optimization_state(&state);
727 set_opt_normalize(0);
730 assert(!get_opt_cse());
732 /* add Keeps for should_be_different constrained nodes */
733 /* beware: needs schedule due to usage of be_ssa_constr */
734 assure_constraints(birg);
735 BE_TIMER_POP(t_constr);
737 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
738 be_do_stat_nodes(irg, "05 Constraints");
740 /* stuff needs to be done after scheduling but before register allocation */
741 BE_TIMER_PUSH(t_codegen);
742 arch_code_generator_before_ra(birg->cg);
743 BE_TIMER_POP(t_codegen);
745 /* connect all stack modifying nodes together (see beabi.c) */
746 BE_TIMER_PUSH(t_abi);
747 be_abi_fix_stack_nodes(birg->abi);
750 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
753 BE_TIMER_PUSH(t_verify);
754 be_sched_vrfy(birg, be_options.vrfy_option);
755 BE_TIMER_POP(t_verify);
757 /* do some statistics */
758 //be_do_stat_reg_pressure(birg);
760 #ifdef FIRM_STATISTICS
761 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
764 /* Do register allocation */
765 be_allocate_registers(birg);
767 #ifdef FIRM_STATISTICS
768 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
771 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
772 be_do_stat_nodes(irg, "06 Register Allocation");
774 /* let the code generator prepare the graph for emitter */
775 BE_TIMER_PUSH(t_finish);
776 arch_code_generator_after_ra(birg->cg);
777 BE_TIMER_POP(t_finish);
779 /* fix stack offsets */
780 BE_TIMER_PUSH(t_abi);
781 be_abi_fix_stack_nodes(birg->abi);
782 be_remove_dead_nodes_from_schedule(birg);
783 be_abi_fix_stack_bias(birg->abi);
786 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
788 BE_TIMER_PUSH(t_finish);
789 arch_code_generator_finish(birg->cg);
790 BE_TIMER_POP(t_finish);
792 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
794 /* check schedule and register allocation */
795 BE_TIMER_PUSH(t_verify);
796 if (be_options.vrfy_option == BE_VRFY_WARN) {
797 irg_verify(irg, VRFY_ENFORCE_SSA);
798 be_check_dominance(irg);
799 be_verify_out_edges(irg);
800 be_verify_schedule(birg);
801 be_verify_register_allocation(birg);
802 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
803 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
804 assert(be_verify_out_edges(irg) && "out edge verification failed");
805 assert(be_check_dominance(irg) && "Dominance verification failed");
806 assert(be_verify_schedule(birg) && "Schedule verification failed");
807 assert(be_verify_register_allocation(birg)
808 && "register allocation verification failed");
811 BE_TIMER_POP(t_verify);
813 /* emit assembler code */
814 BE_TIMER_PUSH(t_emit);
815 arch_code_generator_done(birg->cg);
816 BE_TIMER_POP(t_emit);
818 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
820 BE_TIMER_PUSH(t_abi);
821 be_abi_free(birg->abi);
824 be_do_stat_nodes(irg, "07 Final");
825 restore_optimization_state(&state);
827 BE_TIMER_POP(t_other);
829 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
831 #define LC_EMIT(timer) \
833 stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer)); \
835 printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
837 STOP_AND_RESET_TIMER(timer);
842 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
849 LC_EMIT(t_ssa_constr);
852 LC_EMIT(t_ra_prolog);
854 LC_EMIT(t_ra_spill_apply);
855 LC_EMIT(t_ra_constr);
858 LC_EMIT(t_ra_copymin);
860 LC_EMIT(t_ra_epilog);
869 be_sched_free_phase(irg);
873 /* switched off due to statistics (statistic module needs all irgs) */
874 #if 0 /* STA needs irgs */
875 #ifdef FIRM_STATISTICS
876 if (! stat_is_active())
877 #endif /* FIRM_STATISTICS */
880 stat_ev_ctx_pop("bemain_irg");
886 /* Main interface to the frontend. */
887 void be_main(FILE *file_handle, const char *cup_name)
889 ir_timer_t *t = NULL;
891 /* The user specified another config file to read. do that now. */
892 if(strlen(config_file) > 0) {
895 if((f = fopen(config_file, "rt")) != NULL) {
896 lc_opt_from_file(config_file, f, NULL);
901 if (be_options.timing == BE_TIME_ON) {
902 t = ir_timer_register("bemain", "measure complete bemain loop");
904 if (ir_timer_enter_high_priority()) {
905 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
908 ir_timer_reset_and_start(t);
911 #ifdef FIRM_STATISTICS
912 if (be_options.statev) {
913 const char *dot = strrchr(cup_name, '.');
914 const char *pos = dot ? dot : cup_name + strlen(cup_name);
915 char *buf = alloca(pos - cup_name + 1);
916 strncpy(buf, cup_name, pos - cup_name);
917 buf[pos - cup_name] = '\0';
919 be_options.statev = 1;
920 stat_ev_begin(buf, be_options.filtev);
924 /* never build code for pseudo irgs */
925 set_visit_pseudo_irgs(0);
929 be_main_loop(file_handle, cup_name);
931 if (be_options.timing == BE_TIME_ON) {
933 ir_timer_leave_high_priority();
935 stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
937 printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
941 #ifdef FIRM_STATISTICS
942 if (be_options.statev)
947 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
950 bs = bitset_alloca(cls->n_regs);
952 bitset_clear_all(bs);
954 assert(bitset_size(bs) == (unsigned)cls->n_regs);
955 arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
957 be_abi_put_ignore_regs(birg->abi, cls, bs);
959 return bitset_popcnt(bs);