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);
277 flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE &&
278 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
280 flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ &&
281 flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ
283 flags |= ASM_CONSTRAINT_FLAG_INVALID;
285 if (!(flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ |
286 ASM_CONSTRAINT_FLAG_MODIFIER_WRITE |
287 ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE |
288 ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)
290 flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
296 int be_is_valid_clobber(const char *clobber)
298 /* memory is a valid clobber. (the frontend has to detect this case too,
299 * because it has to add memory edges to the asm) */
300 if (strcmp(clobber, "memory") == 0)
302 /* cc (condition code) is always valid */
303 if (strcmp(clobber, "cc") == 0)
306 return isa_if->is_valid_clobber(isa_if, clobber);
309 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
314 be_add_module_to_list(&isa_ifs, name, (void*) isa);
317 void be_opt_register(void)
319 lc_opt_entry_t *be_grp;
320 static int run_once = 0;
329 be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
330 lc_opt_add_table(be_grp, be_main_options);
332 be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
333 &isa_ifs, (void**) &isa_if);
336 /* Parse one argument. */
337 int be_parse_arg(const char *arg) {
338 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
339 if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
340 lc_opt_print_help(be_grp, stdout);
343 return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
346 /** The be parameters returned by default, all off. */
347 static const backend_params be_params = {
348 0, /* need dword lowering */
349 0, /* don't support inline assembler yet */
350 0, /* no immediate floating point mode. */
351 NULL, /* no additional opcodes */
352 NULL, /* will be set later */
353 NULL, /* but yet no creator function */
354 NULL, /* context for create_intrinsic_fkt */
355 NULL, /* no if conversion settings */
356 NULL /* no immediate fp mode */
359 /* Perform schedule verification if requested. */
360 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
361 if (vrfy_opt == BE_VRFY_WARN) {
362 be_verify_schedule(birg);
363 } else if (vrfy_opt == BE_VRFY_ASSERT) {
364 assert(be_verify_schedule(birg) && "Schedule verification failed.");
368 /* Initialize the Firm backend. Must be run first in init_firm()! */
369 void firm_be_init(void)
375 /* Finalize the Firm backend. */
376 void firm_be_finish(void)
381 /* Returns the backend parameter */
382 const backend_params *be_get_backend_param(void)
384 if (isa_if->get_params)
385 return isa_if->get_params();
390 * Initializes the main environment for the backend.
392 * @param env an empty environment
393 * @param file_handle the file handle where the output will be written to
395 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
397 memset(env, 0, sizeof(*env));
398 env->options = &be_options;
399 env->ent_trampoline_map = pmap_create();
400 env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
401 env->ent_pic_symbol_map = pmap_create();
402 env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
404 remove_irp_type(env->pic_trampolines_type);
405 remove_irp_type(env->pic_symbols_type);
406 set_class_final(env->pic_trampolines_type, 1);
408 memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
409 env->arch_env = arch_env_init(isa_if, file_handle, env);
411 be_phi_handler_new(env);
418 * Called when the be_main_env_t can be destroyed.
420 static void be_done_env(be_main_env_t *env)
422 arch_env_done(env->arch_env);
424 be_phi_handler_free();
426 pmap_destroy(env->ent_trampoline_map);
427 pmap_destroy(env->ent_pic_symbol_map);
428 free_type(env->pic_trampolines_type);
429 free_type(env->pic_symbols_type);
433 * A wrapper around a firm dumper. Dumps only, if
436 * @param mask a bitmask containing the reason what will be dumped
437 * @param irg the IR graph to dump
438 * @param suffix the suffix for the dumper
439 * @param dumper the dumper to be called
441 static void dump(int mask, ir_graph *irg, const char *suffix,
442 void (*dumper)(ir_graph *, const char *))
444 if(be_options.dump_flags & mask)
445 be_dump(irg, suffix, dumper);
449 * Prepare a backend graph for code generation and initialize its birg
451 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
453 memset(birg, 0, sizeof(*birg));
455 birg->main_env = env;
457 edges_deactivate_kind(irg, EDGE_KIND_DEP);
458 edges_activate_kind(irg, EDGE_KIND_DEP);
460 dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
462 be_stat_init_irg(env->arch_env, irg);
463 be_do_stat_nodes(irg, "01 Begin");
465 /* set the current graph (this is important for several firm functions) */
466 current_ir_graph = irg;
468 /* Normalize proj nodes. */
469 normalize_proj_nodes(irg);
471 /* we do this before critical edge split. As this produces less returns,
472 because sometimes (= 164.gzip) multiple returns are slower */
473 normalize_n_returns(irg);
475 /* Remove critical edges */
476 remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
478 /* Ensure, that the ir_edges are computed. */
481 set_irg_phase_state(irg, phase_backend);
483 dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
486 #define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while(0)
490 ir_timer_t *t_codegen;
492 ir_timer_t *t_constr;
493 ir_timer_t *t_finish;
496 ir_timer_t *t_verify;
497 ir_timer_t *t_heights;
499 ir_timer_t *t_execfreq;
500 ir_timer_t *t_ssa_constr;
501 ir_timer_t *t_ra_constr;
502 ir_timer_t *t_ra_prolog;
503 ir_timer_t *t_ra_epilog;
504 ir_timer_t *t_ra_spill;
505 ir_timer_t *t_ra_spill_apply;
506 ir_timer_t *t_ra_color;
507 ir_timer_t *t_ra_ifg;
508 ir_timer_t *t_ra_copymin;
509 ir_timer_t *t_ra_ssa;
510 ir_timer_t *t_ra_other;
513 * The Firm backend main loop.
514 * Do architecture specific lowering for all graphs
515 * and call the architecture specific code generator.
517 * @param file_handle the file handle the output will be written to
518 * @param cup_name name of the compilation unit
520 static void be_main_loop(FILE *file_handle, const char *cup_name)
524 char prof_filename[256];
525 static const char suffix[] = ".prof";
528 ir_graph **irg_list, **backend_irg_list;
529 arch_env_t *arch_env;
531 be_timing = (be_options.timing == BE_TIME_ON);
534 t_abi = ir_timer_register("time_beabi", "be abi introduction");
535 t_codegen = ir_timer_register("time_codegen", "codegeneration");
536 t_sched = ir_timer_register("time_sched", "scheduling");
537 t_constr = ir_timer_register("time_constr", "assure constraints");
538 t_finish = ir_timer_register("time_finish", "graph finish");
539 t_emit = ir_timer_register("time_emiter", "code emiter");
540 t_verify = ir_timer_register("time_verify", "graph verification");
541 t_other = ir_timer_register("time_other", "other");
542 t_heights = ir_timer_register("time_heights", "heights");
543 t_live = ir_timer_register("time_liveness", "be liveness");
544 t_execfreq = ir_timer_register("time_execfreq", "execfreq");
545 t_ssa_constr = ir_timer_register("time_ssa_constr", "ssa reconstruction");
546 t_ra_prolog = ir_timer_register("time_ra_prolog", "regalloc prolog");
547 t_ra_epilog = ir_timer_register("time_ra_epilog", "regalloc epilog");
548 t_ra_constr = ir_timer_register("time_ra_constr", "regalloc constraints");
549 t_ra_spill = ir_timer_register("time_ra_spill", "spiller");
551 = ir_timer_register("time_ra_spill_apply", "apply spills");
552 t_ra_color = ir_timer_register("time_ra_color", "graph coloring");
553 t_ra_ifg = ir_timer_register("time_ra_ifg", "interference graph");
554 t_ra_copymin = ir_timer_register("time_ra_copymin", "copy minimization");
555 t_ra_ssa = ir_timer_register("time_ra_ssadestr", "ssa destruction");
556 t_ra_other = ir_timer_register("time_ra_other", "regalloc other");
559 be_init_env(&env, file_handle);
560 env.cup_name = cup_name;
565 arch_env = env.arch_env;
567 /* backend may provide an ordered list of irgs where code should be generated for */
568 irg_list = NEW_ARR_F(ir_graph *, 0);
569 backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
571 /* we might need 1 birg more for instrumentation constructor */
572 num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
573 birgs = alloca(sizeof(birgs[0]) * (num_birgs + 1));
575 /* First: initialize all birgs */
576 for(i = 0; i < num_birgs; ++i) {
577 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
578 initialize_birg(&birgs[i], irg, &env);
583 Get the filename for the profiling data.
584 Beware: '\0' is already included in sizeof(suffix)
586 memset(prof_filename, 0, sizeof(prof_filename));
587 strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
588 strcat(prof_filename, suffix);
591 Next: Either instruments all irgs with profiling code
592 or try to read in profile data for current translation unit.
594 if (be_options.opt_profile) {
595 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
596 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
599 ir_profile_read(prof_filename);
603 for (i = 0; i < num_birgs; ++i) {
604 be_irg_t *birg = &birgs[i];
605 ir_graph *irg = birg->irg;
606 optimization_state_t state;
607 const arch_code_generator_if_t *cg_if;
609 /* set the current graph (this is important for several firm functions) */
610 current_ir_graph = irg;
614 unsigned percent = 100*i/num_birgs;
615 ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
618 be_sched_init_phase(irg);
620 /* reset the phi handler. */
621 be_phi_handler_reset();
623 stat_ev_ctx_push_fobj("bemain_irg", irg);
625 /* stop and reset timers */
626 BE_TIMER_PUSH(t_other); /* t_other */
628 /* Verify the initial graph */
629 BE_TIMER_PUSH(t_verify);
630 if (be_options.vrfy_option == BE_VRFY_WARN) {
631 irg_verify(irg, VRFY_ENFORCE_SSA);
632 be_check_dominance(irg);
633 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
634 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
635 assert(be_check_dominance(irg) && "Dominance verification failed");
637 BE_TIMER_POP(t_verify);
639 /* Get the code generator interface. */
640 cg_if = arch_env_get_code_generator_if(arch_env);
642 /* get a code generator for this graph. */
643 birg->cg = cg_if->init(birg);
645 /* some transformations need to be done before abi introduce */
646 arch_code_generator_before_abi(birg->cg);
648 /* implement the ABI conventions. */
649 BE_TIMER_PUSH(t_abi);
650 birg->abi = be_abi_introduce(birg);
653 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
654 be_do_stat_nodes(irg, "02 Abi");
656 if (be_options.vrfy_option == BE_VRFY_WARN) {
657 be_check_dominance(irg);
658 be_verify_out_edges(irg);
659 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
660 assert(be_verify_out_edges(irg));
661 assert(be_check_dominance(irg) && "Dominance verification failed");
665 stat_ev_ctx_push_str("bemain_phase", "prepare");
666 BE_TIMER_PUSH(t_codegen);
667 arch_code_generator_prepare_graph(birg->cg);
668 BE_TIMER_POP(t_codegen);
669 stat_ev_ctx_pop("bemain_phase");
671 /* reset the phi handler. */
672 be_phi_handler_reset();
674 be_do_stat_nodes(irg, "03 Prepare");
676 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
678 if (be_options.vrfy_option == BE_VRFY_WARN) {
679 be_check_dominance(irg);
680 be_verify_out_edges(irg);
681 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
682 assert(be_verify_out_edges(irg));
683 assert(be_check_dominance(irg) && "Dominance verification failed");
686 BE_TIMER_PUSH(t_execfreq);
688 * Create execution frequencies from profile data or estimate some
690 if (ir_profile_has_data())
691 birg->exec_freq = ir_create_execfreqs_from_profile(irg);
693 birg->exec_freq = compute_execfreq(irg, 10);
694 BE_TIMER_POP(t_execfreq);
697 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
698 /* be_live_chk_compare(birg); */
700 /* let backend prepare scheduling */
701 stat_ev_ctx_push_str("bemain_phase", "before_sched");
702 BE_TIMER_PUSH(t_codegen);
703 arch_code_generator_before_sched(birg->cg);
704 BE_TIMER_POP(t_codegen);
705 stat_ev_ctx_pop("bemain_phase");
707 /* schedule the irg */
708 BE_TIMER_PUSH(t_sched);
709 switch (be_options.scheduler) {
711 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
713 list_sched(birg, &be_options);
717 be_ilp_sched(birg, &be_options);
719 #endif /* WITH_ILP */
721 BE_TIMER_POP(t_sched);
723 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
726 BE_TIMER_PUSH(t_verify);
727 be_sched_vrfy(birg, be_options.vrfy_option);
728 BE_TIMER_POP(t_verify);
730 be_do_stat_nodes(irg, "04 Schedule");
732 /* introduce patterns to assure constraints */
733 BE_TIMER_PUSH(t_constr);
734 /* we switch off optimizations here, because they might cause trouble */
735 save_optimization_state(&state);
737 set_opt_normalize(0);
740 assert(!get_opt_cse());
742 /* add Keeps for should_be_different constrained nodes */
743 /* beware: needs schedule due to usage of be_ssa_constr */
744 assure_constraints(birg);
745 BE_TIMER_POP(t_constr);
747 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
748 be_do_stat_nodes(irg, "05 Constraints");
750 /* stuff needs to be done after scheduling but before register allocation */
751 BE_TIMER_PUSH(t_codegen);
752 arch_code_generator_before_ra(birg->cg);
753 BE_TIMER_POP(t_codegen);
755 /* connect all stack modifying nodes together (see beabi.c) */
756 BE_TIMER_PUSH(t_abi);
757 be_abi_fix_stack_nodes(birg->abi);
760 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
763 BE_TIMER_PUSH(t_verify);
764 be_sched_vrfy(birg, be_options.vrfy_option);
765 BE_TIMER_POP(t_verify);
767 /* do some statistics */
768 //be_do_stat_reg_pressure(birg);
770 #ifdef FIRM_STATISTICS
771 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
774 /* Do register allocation */
775 be_allocate_registers(birg);
777 #ifdef FIRM_STATISTICS
778 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
781 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
782 be_do_stat_nodes(irg, "06 Register Allocation");
784 /* let the code generator prepare the graph for emitter */
785 BE_TIMER_PUSH(t_finish);
786 arch_code_generator_after_ra(birg->cg);
787 BE_TIMER_POP(t_finish);
789 /* fix stack offsets */
790 BE_TIMER_PUSH(t_abi);
791 be_abi_fix_stack_nodes(birg->abi);
792 be_remove_dead_nodes_from_schedule(birg);
793 be_abi_fix_stack_bias(birg->abi);
796 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
798 BE_TIMER_PUSH(t_finish);
799 arch_code_generator_finish(birg->cg);
800 BE_TIMER_POP(t_finish);
802 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
804 /* check schedule and register allocation */
805 BE_TIMER_PUSH(t_verify);
806 if (be_options.vrfy_option == BE_VRFY_WARN) {
807 irg_verify(irg, VRFY_ENFORCE_SSA);
808 be_check_dominance(irg);
809 be_verify_out_edges(irg);
810 be_verify_schedule(birg);
811 be_verify_register_allocation(birg);
812 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
813 assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
814 assert(be_verify_out_edges(irg) && "out edge verification failed");
815 assert(be_check_dominance(irg) && "Dominance verification failed");
816 assert(be_verify_schedule(birg) && "Schedule verification failed");
817 assert(be_verify_register_allocation(birg)
818 && "register allocation verification failed");
821 BE_TIMER_POP(t_verify);
823 /* emit assembler code */
824 BE_TIMER_PUSH(t_emit);
825 arch_code_generator_done(birg->cg);
826 BE_TIMER_POP(t_emit);
828 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
830 BE_TIMER_PUSH(t_abi);
831 be_abi_free(birg->abi);
834 be_do_stat_nodes(irg, "07 Final");
835 restore_optimization_state(&state);
837 BE_TIMER_POP(t_other);
839 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
841 #define LC_EMIT(timer) \
843 stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer)); \
845 printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
847 STOP_AND_RESET_TIMER(timer);
852 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
859 LC_EMIT(t_ssa_constr);
862 LC_EMIT(t_ra_prolog);
864 LC_EMIT(t_ra_spill_apply);
865 LC_EMIT(t_ra_constr);
868 LC_EMIT(t_ra_copymin);
870 LC_EMIT(t_ra_epilog);
879 be_sched_free_phase(irg);
883 /* switched off due to statistics (statistic module needs all irgs) */
884 #if 0 /* STA needs irgs */
885 #ifdef FIRM_STATISTICS
886 if (! stat_is_active())
887 #endif /* FIRM_STATISTICS */
890 stat_ev_ctx_pop("bemain_irg");
896 /* Main interface to the frontend. */
897 void be_main(FILE *file_handle, const char *cup_name)
899 ir_timer_t *t = NULL;
901 /* The user specified another config file to read. do that now. */
902 if (config_file[0] != '\0') {
905 if ((f = fopen(config_file, "rt")) != NULL) {
906 lc_opt_from_file(config_file, f, NULL);
911 if (be_options.timing == BE_TIME_ON) {
912 t = ir_timer_register("bemain", "measure complete bemain loop");
914 if (ir_timer_enter_high_priority()) {
915 fprintf(stderr, "Warning: Could not enter high priority mode.\n");
918 ir_timer_reset_and_start(t);
921 #ifdef FIRM_STATISTICS
922 if (be_options.statev) {
923 const char *dot = strrchr(cup_name, '.');
924 const char *pos = dot ? dot : cup_name + strlen(cup_name);
925 char *buf = alloca(pos - cup_name + 1);
926 strncpy(buf, cup_name, pos - cup_name);
927 buf[pos - cup_name] = '\0';
929 be_options.statev = 1;
930 stat_ev_begin(buf, be_options.filtev);
934 /* never build code for pseudo irgs */
935 set_visit_pseudo_irgs(0);
939 be_main_loop(file_handle, cup_name);
941 if (be_options.timing == BE_TIME_ON) {
943 ir_timer_leave_high_priority();
945 stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
947 printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
951 #ifdef FIRM_STATISTICS
952 if (be_options.statev)
957 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
960 bs = bitset_alloca(cls->n_regs);
962 bitset_clear_all(bs);
964 assert(bitset_size(bs) == (unsigned)cls->n_regs);
965 arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
967 be_abi_put_ignore_regs(birg->abi, cls, bs);
969 return bitset_popcnt(bs);