reduce code size
[libfirm] / ir / be / bemain.c
1 /*
2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
3  *
4  * This file is part of libFirm.
5  *
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.
10  *
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.
14  *
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
17  * PURPOSE.
18  */
19
20 /**
21  * @file
22  * @brief       Main Backend driver.
23  * @author      Sebastian Hack
24  * @date        25.11.2004
25  * @version     $Id$
26  */
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <stdarg.h>
32 #include <stdio.h>
33
34 #include "lc_opts.h"
35 #include "lc_opts_enum.h"
36
37 #include "obst.h"
38 #include "bitset.h"
39
40 #include "irprog.h"
41 #include "irgopt.h"
42 #include "irgraph.h"
43 #include "irdump.h"
44 #include "phiclass.h"
45 #include "irdom_t.h"
46 #include "iredges_t.h"
47 #include "irloop_t.h"
48 #include "irtools.h"
49 #include "irvrfy.h"
50 #include "irprintf.h"
51 #include "iroptimize.h"
52 #include "firmstat.h"
53 #include "execfreq.h"
54 #include "irprofile.h"
55
56 #include "bearch_t.h"
57 #include "be_t.h"
58 #include "bemodule.h"
59 #include "beutil.h"
60 #include "benode_t.h"
61 #include "beirgmod.h"
62 #include "besched_t.h"
63 #include "belistsched.h"
64 #include "belive_t.h"
65 #include "bera.h"
66 #include "bechordal_t.h"
67 #include "beifg.h"
68 #include "beifg_impl.h"
69 #include "becopyopt.h"
70 #include "becopystat.h"
71 #include "bessadestr.h"
72 #include "beabi.h"
73 #include "belower.h"
74 #include "beschedmris.h"
75 #include "bestat.h"
76 #include "beverify.h"
77 #include "be_dbgout.h"
78 #include "beirg_t.h"
79
80 #define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
81
82 #ifdef WITH_ILP
83 #include "beilpsched.h"
84 #endif /* WITH_ILP */
85
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,                                 /* create PIC code */
93         0,                                 /* create gprof compatible profiling code */
94         BE_VRFY_WARN,                      /* verification level: warn */
95         BE_SCHED_LIST,                     /* scheduler: list scheduler */
96         "linux",                           /* target OS name */
97         "i44pc52.info.uni-karlsruhe.de",   /* ilp server */
98         "cplex",                           /* ilp solver */
99         0,                                 /* enable statistic event dumping */
100         "",                                /* print stat events */
101 };
102
103 /* config file. */
104 static char config_file[256] = { 0 };
105
106 /* back end instruction set architecture to use */
107 static const arch_isa_if_t *isa_if = NULL;
108
109 /* possible dumping options */
110 static const lc_opt_enum_mask_items_t dump_items[] = {
111         { "none",       DUMP_NONE },
112         { "initial",    DUMP_INITIAL },
113         { "abi",        DUMP_ABI    },
114         { "sched",      DUMP_SCHED  },
115         { "prepared",   DUMP_PREPARED },
116         { "regalloc",   DUMP_RA },
117         { "final",      DUMP_FINAL },
118         { "be",         DUMP_BE },
119         { "all",        2 * DUMP_BE - 1 },
120         { NULL,         0 }
121 };
122
123 /* verify options. */
124 static const lc_opt_enum_int_items_t vrfy_items[] = {
125         { "off",    BE_VRFY_OFF    },
126         { "warn",   BE_VRFY_WARN   },
127         { "assert", BE_VRFY_ASSERT },
128         { NULL,     0 }
129 };
130
131 /* scheduling options. */
132 static const lc_opt_enum_int_items_t sched_items[] = {
133         { "list", BE_SCHED_LIST },
134 #ifdef WITH_ILP
135         { "ilp",  BE_SCHED_ILP  },
136 #endif /* WITH_ILP */
137         { NULL,   0 }
138 };
139
140 static lc_opt_enum_mask_var_t dump_var = {
141         &be_options.dump_flags, dump_items
142 };
143
144 static lc_opt_enum_int_var_t vrfy_var = {
145         &be_options.vrfy_option, vrfy_items
146 };
147
148 static lc_opt_enum_int_var_t sched_var = {
149         &be_options.scheduler, sched_items
150 };
151
152 static const lc_opt_table_entry_t be_main_options[] = {
153         LC_OPT_ENT_STR      ("config",   "read another config file containing backend options", config_file, sizeof(config_file)),
154         LC_OPT_ENT_ENUM_MASK("dump",     "dump irg on several occasions",                       &dump_var),
155         LC_OPT_ENT_BOOL     ("omitfp",   "omit frame pointer",                                  &be_options.omit_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 ("vrfy",     "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)),
166 #endif
167
168 #ifdef WITH_ILP
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 */
172         LC_OPT_LAST
173 };
174
175 static be_module_list_entry_t *isa_ifs = NULL;
176
177 void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
178 {
179         if (isa_if == NULL)
180                 isa_if = isa;
181
182         be_add_module_to_list(&isa_ifs, name, (void*) isa);
183 }
184
185 void be_opt_register(void)
186 {
187         lc_opt_entry_t *be_grp;
188         static int run_once = 0;
189
190         if (run_once) {
191                 return;
192         }
193         run_once     = 1;
194
195         be_init_modules();
196
197         be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
198         lc_opt_add_table(be_grp, be_main_options);
199
200         be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
201                                &isa_ifs, (void**) &isa_if);
202 }
203
204 /* Parse one argument. */
205 int be_parse_arg(const char *arg) {
206         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
207         if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
208                 lc_opt_print_help(be_grp, stdout);
209                 return -1;
210         }
211         return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
212 }
213
214 /** The be parameters returned by default, all off. */
215 static const backend_params be_params = {
216         0,    /* need dword lowering */
217         0,    /* don't support inlien assembler yet */
218         NULL, /* no additional opcodes */
219         NULL, /* will be set later */
220         NULL, /* but yet no creator function */
221         NULL, /* context for create_intrinsic_fkt */
222         NULL, /* no if conversion settings */
223 };
224
225 /* Perform schedule verification if requested. */
226 static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
227         if (vrfy_opt == BE_VRFY_WARN) {
228                 be_verify_schedule(birg);
229         } else if (vrfy_opt == BE_VRFY_ASSERT) {
230                 assert(be_verify_schedule(birg) && "Schedule verification failed.");
231         }
232 }
233
234 /* Initialize the Firm backend. Must be run BEFORE init_firm()! */
235 const backend_params *be_init(void)
236 {
237         be_opt_register();
238         be_init_modules();
239
240         if (isa_if->get_params)
241                 return isa_if->get_params();
242         return &be_params;
243 }
244
245 /**
246  * Initializes the main environment for the backend.
247  *
248  * @param env          an empty environment
249  * @param file_handle  the file handle where the output will be written to
250  */
251 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
252 {
253         memset(env, 0, sizeof(*env));
254         env->options              = &be_options;
255         env->ent_trampoline_map   = pmap_create();
256         env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
257         env->ent_pic_symbol_map   = pmap_create();
258         env->pic_symbols_type     = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
259
260         remove_irp_type(env->pic_trampolines_type);
261         remove_irp_type(env->pic_symbols_type);
262         set_class_final(env->pic_trampolines_type, 1);
263
264         arch_env_init(&env->arch_env, isa_if, file_handle, env);
265
266         /* Register the irn handler of the architecture */
267         if (arch_isa_get_irn_handler(env->arch_env.isa))
268                 arch_env_push_irn_handler(&env->arch_env, arch_isa_get_irn_handler(env->arch_env.isa));
269
270         /*
271          * Register the node handler of the back end infrastructure.
272          * This irn handler takes care of the platform independent
273          * spill, reload and perm nodes.
274          */
275         arch_env_push_irn_handler(&env->arch_env, &be_node_irn_handler);
276         env->phi_handler = be_phi_handler_new(&env->arch_env);
277         arch_env_push_irn_handler(&env->arch_env, env->phi_handler);
278
279         be_dbg_open();
280         return env;
281 }
282
283 /**
284  * Called when the be_main_env_t can be destroyed.
285  */
286 static void be_done_env(be_main_env_t *env)
287 {
288         env->arch_env.isa->impl->done(env->arch_env.isa);
289         be_dbg_close();
290         be_phi_handler_free(env->phi_handler);
291
292         pmap_destroy(env->ent_trampoline_map);
293         pmap_destroy(env->ent_pic_symbol_map);
294         free_type(env->pic_trampolines_type);
295         free_type(env->pic_symbols_type);
296 }
297
298 /**
299  * A wrapper around a firm dumper. Dumps only, if
300  * flags are enabled.
301  *
302  * @param mask    a bitmask containing the reason what will be dumped
303  * @param irg     the IR graph to dump
304  * @param suffix  the suffix for the dumper
305  * @param dumper  the dumper to be called
306  */
307 static void dump(int mask, ir_graph *irg, const char *suffix,
308                  void (*dumper)(ir_graph *, const char *))
309 {
310         if(be_options.dump_flags & mask)
311                 be_dump(irg, suffix, dumper);
312 }
313
314 /**
315  * Prepare a backend graph for code generation and initialize its birg
316  */
317 static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
318 {
319         memset(birg, 0, sizeof(*birg));
320         birg->irg = irg;
321         birg->main_env = env;
322
323         edges_deactivate_kind(irg, EDGE_KIND_DEP);
324         edges_activate_kind(irg, EDGE_KIND_DEP);
325
326         dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
327
328         be_stat_init_irg(&env->arch_env, irg);
329         be_do_stat_nodes(irg, "01 Begin");
330
331         /* set the current graph (this is important for several firm functions) */
332         current_ir_graph = irg;
333
334         /* Normalize proj nodes. */
335         normalize_proj_nodes(irg);
336
337         /* we do this before critical edge split. As this produces less returns,
338            because sometimes (= 164.gzip) multiple returns are slower */
339         normalize_n_returns(irg);
340
341         /* Remove critical edges */
342         remove_critical_cf_edges(irg);
343
344         /* Ensure, that the ir_edges are computed. */
345         edges_assure(irg);
346
347         set_irg_phase_state(irg, phase_backend);
348
349         dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
350 }
351
352 #define BE_TIMER_ONLY(code)   do { if (be_timing) { code; } } while(0)
353
354 int be_timing;
355 ir_timer_t *t_abi;
356 ir_timer_t *t_codegen;
357 ir_timer_t *t_sched;
358 ir_timer_t *t_constr;
359 ir_timer_t *t_finish;
360 ir_timer_t *t_emit;
361 ir_timer_t *t_other;
362 ir_timer_t *t_verify;
363 ir_timer_t *t_heights;
364 ir_timer_t *t_live;
365 ir_timer_t *t_execfreq;
366 ir_timer_t *t_ssa_constr;
367 ir_timer_t *t_ra_constr;
368 ir_timer_t *t_ra_prolog;
369 ir_timer_t *t_ra_epilog;
370 ir_timer_t *t_ra_spill;
371 ir_timer_t *t_ra_spill_apply;
372 ir_timer_t *t_ra_color;
373 ir_timer_t *t_ra_ifg;
374 ir_timer_t *t_ra_copymin;
375 ir_timer_t *t_ra_ssa;
376 ir_timer_t *t_ra_other;
377
378 /**
379  * The Firm backend main loop.
380  * Do architecture specific lowering for all graphs
381  * and call the architecture specific code generator.
382  *
383  * @param file_handle   the file handle the output will be written to
384  * @param cup_name      name of the compilation unit
385  */
386 static void be_main_loop(FILE *file_handle, const char *cup_name)
387 {
388         int i;
389         arch_isa_t *isa;
390         be_main_env_t env;
391         char prof_filename[256];
392         static const char suffix[] = ".prof";
393         be_irg_t *birgs;
394         int num_birgs;
395         ir_graph **irg_list, **backend_irg_list;
396
397         be_timing = (be_options.timing == BE_TIME_ON);
398
399         if (be_timing) {
400                 t_abi        = ir_timer_register("time_beabi",       "be abi introduction");
401                 t_codegen    = ir_timer_register("time_codegen",     "codegeneration");
402                 t_sched      = ir_timer_register("time_sched",       "scheduling");
403                 t_constr     = ir_timer_register("time_constr",      "assure constraints");
404                 t_finish     = ir_timer_register("time_finish",      "graph finish");
405                 t_emit       = ir_timer_register("time_emiter",      "code emiter");
406                 t_verify     = ir_timer_register("time_verify",      "graph verification");
407                 t_other      = ir_timer_register("time_other",       "other");
408                 t_heights    = ir_timer_register("time_heights",     "heights");
409                 t_live       = ir_timer_register("time_liveness",    "be liveness");
410                 t_execfreq   = ir_timer_register("time_execfreq",    "execfreq");
411                 t_ssa_constr = ir_timer_register("time_ssa_constr",  "ssa reconstruction");
412                 t_ra_prolog  = ir_timer_register("time_ra_prolog",   "regalloc prolog");
413                 t_ra_epilog  = ir_timer_register("time_ra_epilog",   "regalloc epilog");
414                 t_ra_constr  = ir_timer_register("time_ra_constr",   "regalloc constraints");
415                 t_ra_spill   = ir_timer_register("time_ra_spill",    "spiller");
416                 t_ra_spill_apply
417                         = ir_timer_register("time_ra_spill_apply", "apply spills");
418                 t_ra_color   = ir_timer_register("time_ra_color",    "graph coloring");
419                 t_ra_ifg     = ir_timer_register("time_ra_ifg",      "interference graph");
420                 t_ra_copymin = ir_timer_register("time_ra_copymin",  "copy minimization");
421                 t_ra_ssa     = ir_timer_register("time_ra_ssadestr", "ssa destruction");
422                 t_ra_other   = ir_timer_register("time_ra_other",    "regalloc other");
423         }
424
425         be_init_env(&env, file_handle);
426         env.cup_name = cup_name;
427
428         isa = arch_env_get_isa(&env.arch_env);
429
430         be_dbg_so(cup_name);
431         be_dbg_types();
432
433         /* backend may provide an ordered list of irgs where code should be generated for */
434         irg_list         = NEW_ARR_F(ir_graph *, 0);
435         backend_irg_list = arch_isa_get_backend_irg_list(isa, &irg_list);
436
437         /* we might need 1 birg more for instrumentation constructor */
438         num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
439         birgs     = alloca(sizeof(birgs[0]) * (num_birgs + 1));
440
441         /* First: initialize all birgs */
442         for(i = 0; i < num_birgs; ++i) {
443                 ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
444                 initialize_birg(&birgs[i], irg, &env);
445         }
446         DEL_ARR_F(irg_list);
447
448         /*
449                 Get the filename for the profiling data.
450                 Beware: '\0' is already included in sizeof(suffix)
451         */
452         memset(prof_filename, 0, sizeof(prof_filename));
453         strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
454         strcat(prof_filename, suffix);
455
456         /*
457                 Next: Either instruments all irgs with profiling code
458                 or try to read in profile data for current translation unit.
459         */
460         if (be_options.opt_profile) {
461                 ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
462                 initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
463                 num_birgs++;
464         } else {
465                 ir_profile_read(prof_filename);
466         }
467
468         /* For all graphs */
469         for (i = 0; i < num_birgs; ++i) {
470                 be_irg_t *birg = &birgs[i];
471                 ir_graph *irg  = birg->irg;
472                 optimization_state_t state;
473                 const arch_code_generator_if_t *cg_if;
474
475                 /* set the current graph (this is important for several firm functions) */
476                 current_ir_graph = irg;
477
478                 be_sched_init_phase(irg);
479
480                 /* reset the phi handler. */
481                 be_phi_handler_reset(env.phi_handler);
482
483                 stat_ev_ctx_push_fobj("bemain_irg", irg);
484
485                 /* stop and reset timers */
486                 BE_TIMER_PUSH(t_other);   /* t_other */
487
488                 /* Verify the initial graph */
489                 BE_TIMER_PUSH(t_verify);
490                 if (be_options.vrfy_option == BE_VRFY_WARN) {
491                         irg_verify(irg, VRFY_ENFORCE_SSA);
492                         be_check_dominance(irg);
493                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
494                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
495                         assert(be_check_dominance(irg) && "Dominance verification failed");
496                 }
497                 BE_TIMER_POP(t_verify);
498
499                 /* Get the code generator interface. */
500                 cg_if = isa->impl->get_code_generator_if(isa);
501
502                 /* get a code generator for this graph. */
503                 birg->cg = cg_if->init(birg);
504
505                 /* some transformations need to be done before abi introduce */
506                 arch_code_generator_before_abi(birg->cg);
507
508                 /* implement the ABI conventions. */
509                 BE_TIMER_PUSH(t_abi);
510                 birg->abi = be_abi_introduce(birg);
511                 BE_TIMER_POP(t_abi);
512
513                 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
514                 be_do_stat_nodes(irg, "02 Abi");
515
516                 if (be_options.vrfy_option == BE_VRFY_WARN) {
517                         be_check_dominance(irg);
518                         be_verify_out_edges(irg);
519                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
520                         assert(be_verify_out_edges(irg));
521                         assert(be_check_dominance(irg) && "Dominance verification failed");
522                 }
523
524                 /* generate code */
525                 stat_ev_ctx_push_str("bemain_phase", "prepare");
526                 BE_TIMER_PUSH(t_codegen);
527                 arch_code_generator_prepare_graph(birg->cg);
528                 BE_TIMER_POP(t_codegen);
529                 stat_ev_ctx_pop("bemain_phase");
530
531                 /* reset the phi handler. */
532                 be_phi_handler_reset(env.phi_handler);
533
534                 be_do_stat_nodes(irg, "03 Prepare");
535
536                 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
537
538                 if (be_options.vrfy_option == BE_VRFY_WARN) {
539                         be_check_dominance(irg);
540                         be_verify_out_edges(irg);
541                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
542                         assert(be_verify_out_edges(irg));
543                         assert(be_check_dominance(irg) && "Dominance verification failed");
544                 }
545
546                 BE_TIMER_PUSH(t_execfreq);
547                 /**
548                  * Create execution frequencies from profile data or estimate some
549                  */
550                 if (ir_profile_has_data())
551                         birg->exec_freq = ir_create_execfreqs_from_profile(irg);
552                 else
553                         birg->exec_freq = compute_execfreq(irg, 10);
554                 BE_TIMER_POP(t_execfreq);
555
556
557                 /* disabled for now, fails for EmptyFor.c and XXEndless.c */
558                 /* be_live_chk_compare(birg); */
559
560                 /* let backend prepare scheduling */
561                 stat_ev_ctx_push_str("bemain_phase", "before_sched");
562                 BE_TIMER_PUSH(t_codegen);
563                 arch_code_generator_before_sched(birg->cg);
564                 BE_TIMER_POP(t_codegen);
565                 stat_ev_ctx_pop("bemain_phase");
566
567                 /* schedule the irg */
568                 BE_TIMER_PUSH(t_sched);
569                 switch (be_options.scheduler) {
570                         default:
571                                 fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
572                         case BE_SCHED_LIST:
573                                 list_sched(birg, &be_options);
574                                 break;
575 #ifdef WITH_ILP
576                         case BE_SCHED_ILP:
577                                 be_ilp_sched(birg, &be_options);
578                                 break;
579 #endif /* WITH_ILP */
580                 };
581                 BE_TIMER_POP(t_sched);
582
583                 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
584
585                 /* check schedule */
586                 BE_TIMER_PUSH(t_verify);
587                 be_sched_vrfy(birg, be_options.vrfy_option);
588                 BE_TIMER_POP(t_verify);
589
590                 be_do_stat_nodes(irg, "04 Schedule");
591
592                 /* introduce patterns to assure constraints */
593                 BE_TIMER_PUSH(t_constr);
594                 /* we switch off optimizations here, because they might cause trouble */
595                 save_optimization_state(&state);
596                 set_optimize(0);
597                 set_opt_normalize(0);
598                 set_opt_cse(0);
599
600                 assert(!get_opt_cse());
601
602                 /* add Keeps for should_be_different constrained nodes  */
603                 /* beware: needs schedule due to usage of be_ssa_constr */
604                 assure_constraints(birg);
605                 BE_TIMER_POP(t_constr);
606
607                 dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
608                 be_do_stat_nodes(irg, "05 Constraints");
609
610                 /* stuff needs to be done after scheduling but before register allocation */
611                 BE_TIMER_PUSH(t_codegen);
612                 arch_code_generator_before_ra(birg->cg);
613                 BE_TIMER_POP(t_codegen);
614
615                 /* connect all stack modifying nodes together (see beabi.c) */
616                 BE_TIMER_PUSH(t_abi);
617                 be_abi_fix_stack_nodes(birg->abi);
618                 BE_TIMER_POP(t_abi);
619
620                 dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
621
622                 /* check schedule */
623                 BE_TIMER_PUSH(t_verify);
624                 be_sched_vrfy(birg, be_options.vrfy_option);
625                 BE_TIMER_POP(t_verify);
626
627                 /* do some statistics */
628                 //be_do_stat_reg_pressure(birg);
629
630 #ifdef FIRM_STATISTICS
631                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, &env.arch_env, birg->exec_freq));
632 #endif
633
634                 /* Do register allocation */
635                 be_allocate_registers(birg);
636
637 #ifdef FIRM_STATISTICS
638                 stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, &env.arch_env, birg->exec_freq));
639 #endif
640
641                 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
642                 be_do_stat_nodes(irg, "06 Register Allocation");
643
644                 /* let the code generator prepare the graph for emitter */
645                 BE_TIMER_PUSH(t_finish);
646                 arch_code_generator_after_ra(birg->cg);
647                 BE_TIMER_POP(t_finish);
648
649                 /* fix stack offsets */
650                 BE_TIMER_PUSH(t_abi);
651                 be_abi_fix_stack_nodes(birg->abi);
652                 be_remove_dead_nodes_from_schedule(birg);
653                 be_abi_fix_stack_bias(birg->abi);
654                 BE_TIMER_POP(t_abi);
655
656                 dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
657
658                 BE_TIMER_PUSH(t_finish);
659                 arch_code_generator_finish(birg->cg);
660                 BE_TIMER_POP(t_finish);
661
662                 dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched);
663
664                 /* check schedule and register allocation */
665                 BE_TIMER_PUSH(t_verify);
666                 if (be_options.vrfy_option == BE_VRFY_WARN) {
667                         irg_verify(irg, VRFY_ENFORCE_SSA);
668                         be_check_dominance(irg);
669                         be_verify_out_edges(irg);
670                         be_verify_schedule(birg);
671                         be_verify_register_allocation(birg);
672                 } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
673                         assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
674                         assert(be_verify_out_edges(irg) && "out edge verification failed");
675                         assert(be_check_dominance(irg) && "Dominance verification failed");
676                         assert(be_verify_schedule(birg) && "Schedule verification failed");
677                         assert(be_verify_register_allocation(birg)
678                                && "register allocation verification failed");
679
680                 }
681                 BE_TIMER_POP(t_verify);
682
683                 /* emit assembler code */
684                 BE_TIMER_PUSH(t_emit);
685                 arch_code_generator_done(birg->cg);
686                 BE_TIMER_POP(t_emit);
687
688                 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
689
690                 BE_TIMER_PUSH(t_abi);
691                 be_abi_free(birg->abi);
692                 BE_TIMER_POP(t_abi);
693
694                 be_do_stat_nodes(irg, "07 Final");
695                 restore_optimization_state(&state);
696
697                 BE_TIMER_POP(t_other);
698
699 #define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
700
701 #define LC_EMIT(timer)  \
702                 stat_ev_if {    \
703                         stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer));  \
704                 } else { \
705                         printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
706                 } \
707                 STOP_AND_RESET_TIMER(timer);
708
709                 BE_TIMER_ONLY(
710                         stat_ev_if {
711                         } else {
712                                 printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
713                         }
714                         LC_EMIT(t_abi);
715                         LC_EMIT(t_codegen);
716                         LC_EMIT(t_sched);
717                         LC_EMIT(t_live);
718                         LC_EMIT(t_heights);
719                         LC_EMIT(t_ssa_constr);
720                         LC_EMIT(t_constr);
721                         LC_EMIT(t_execfreq);
722                         LC_EMIT(t_ra_prolog);
723                         LC_EMIT(t_ra_spill);
724                         LC_EMIT(t_ra_spill_apply);
725                         LC_EMIT(t_ra_constr);
726                         LC_EMIT(t_ra_color);
727                         LC_EMIT(t_ra_ifg);
728                         LC_EMIT(t_ra_copymin);
729                         LC_EMIT(t_ra_ssa);
730                         LC_EMIT(t_ra_epilog);
731                         LC_EMIT(t_ra_other);
732                         LC_EMIT(t_finish);
733                         LC_EMIT(t_emit);
734                         LC_EMIT(t_verify);
735                         LC_EMIT(t_other);
736                 );
737 #undef LC_EMIT
738
739                 be_sched_free_phase(irg);
740
741                 be_free_birg(birg);
742
743         /* switched off due to statistics (statistic module needs all irgs) */
744 #if 0   /* STA needs irgs */
745 #ifdef FIRM_STATISTICS
746                 if (! stat_is_active())
747 #endif /* FIRM_STATISTICS */
748                         free_ir_graph(irg);
749 #endif /* if 0 */
750                 stat_ev_ctx_pop("bemain_irg");
751         }
752         ir_profile_free();
753         be_done_env(&env);
754 }
755
756 /* Main interface to the frontend. */
757 void be_main(FILE *file_handle, const char *cup_name)
758 {
759         ir_timer_t *t = NULL;
760
761         /* The user specified another config file to read. do that now. */
762         if(strlen(config_file) > 0) {
763                 FILE *f;
764
765                 if((f = fopen(config_file, "rt")) != NULL) {
766                         lc_opt_from_file(config_file, f, NULL);
767                         fclose(f);
768                 }
769         }
770
771         if (be_options.timing == BE_TIME_ON) {
772                 t = ir_timer_register("bemain", "measure complete bemain loop");
773
774                 if (ir_timer_enter_high_priority()) {
775                         fprintf(stderr, "Warning: Could not enter high priority mode.\n");
776                 }
777
778                 ir_timer_reset_and_start(t);
779         }
780
781 #ifdef FIRM_STATISTICS
782         if (be_options.statev) {
783                 const char *dot = strrchr(cup_name, '.');
784                 const char *pos = dot ? dot : cup_name + strlen(cup_name);
785                 char       *buf = alloca(pos - cup_name + 1);
786                 strncpy(buf, cup_name, pos - cup_name);
787                 buf[pos - cup_name] = '\0';
788
789                 be_options.statev = 1;
790                 stat_ev_begin(buf, be_options.filtev);
791         }
792 #endif
793
794         /* never build code for pseudo irgs */
795         set_visit_pseudo_irgs(0);
796
797         be_node_init();
798
799         be_main_loop(file_handle, cup_name);
800
801         if (be_options.timing == BE_TIME_ON) {
802                 ir_timer_stop(t);
803                 ir_timer_leave_high_priority();
804                 stat_ev_if {
805                         stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
806                 } else {
807                         printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
808                 }
809         }
810
811 #ifdef FIRM_STATISTICS
812         if (be_options.statev)
813                 stat_ev_end();
814 #endif
815 }
816
817 unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
818 {
819         if (bs == NULL)
820                 bs = bitset_alloca(cls->n_regs);
821         else
822                 bitset_clear_all(bs);
823
824         assert(bitset_size(bs) == (unsigned)cls->n_regs);
825         arch_put_non_ignore_regs(&birg->main_env->arch_env, cls, bs);
826         bitset_flip_all(bs);
827         be_abi_put_ignore_regs(birg->abi, cls, bs);
828
829         return bitset_popcnt(bs);
830 }