3 * @file firm_opt.c -- Firm-generating back end optimizations.
5 * (C) 2005-2010 Michael Beck beck@ipd.info.uni-karlsruhe.de
17 #include <libfirm/firm.h>
20 #include "firm_codegen.h"
21 #include "firm_cmdline.h"
22 #include "firm_timing.h"
25 static ir_timer_t *t_vcg_dump;
26 static ir_timer_t *t_verify;
27 static ir_timer_t *t_all_opt;
28 static bool do_irg_opt(ir_graph *irg, const char *name);
30 /** dump all the graphs depending on cond */
32 static void dump_all(const char *suffix)
34 if (!firm_dump.ir_graph)
37 timer_push(t_vcg_dump);
38 dump_all_ir_graphs(suffix);
39 timer_pop(t_vcg_dump);
42 /* entities of runtime functions */
43 ir_entity_ptr rts_entities[rts_max];
46 * Map runtime functions.
48 static void rts_map(void)
51 ir_entity_ptr *ent; /**< address of the rts entity */
52 i_mapper_func func; /**< mapper function. */
55 { &rts_entities[rts_abs], i_mapper_abs },
56 { &rts_entities[rts_labs], i_mapper_abs },
57 { &rts_entities[rts_llabs], i_mapper_abs },
58 { &rts_entities[rts_imaxabs], i_mapper_abs },
60 /* double -> double */
61 { &rts_entities[rts_fabs], i_mapper_abs },
62 { &rts_entities[rts_sqrt], i_mapper_sqrt },
63 { &rts_entities[rts_cbrt], i_mapper_cbrt },
64 { &rts_entities[rts_pow], i_mapper_pow },
65 { &rts_entities[rts_exp], i_mapper_exp },
66 { &rts_entities[rts_exp2], i_mapper_exp },
67 { &rts_entities[rts_exp10], i_mapper_exp },
68 { &rts_entities[rts_log], i_mapper_log },
69 { &rts_entities[rts_log2], i_mapper_log2 },
70 { &rts_entities[rts_log10], i_mapper_log10 },
71 { &rts_entities[rts_sin], i_mapper_sin },
72 { &rts_entities[rts_cos], i_mapper_cos },
73 { &rts_entities[rts_tan], i_mapper_tan },
74 { &rts_entities[rts_asin], i_mapper_asin },
75 { &rts_entities[rts_acos], i_mapper_acos },
76 { &rts_entities[rts_atan], i_mapper_atan },
77 { &rts_entities[rts_sinh], i_mapper_sinh },
78 { &rts_entities[rts_cosh], i_mapper_cosh },
79 { &rts_entities[rts_tanh], i_mapper_tanh },
82 { &rts_entities[rts_fabsf], i_mapper_abs },
83 { &rts_entities[rts_sqrtf], i_mapper_sqrt },
84 { &rts_entities[rts_cbrtf], i_mapper_cbrt },
85 { &rts_entities[rts_powf], i_mapper_pow },
86 { &rts_entities[rts_expf], i_mapper_exp },
87 { &rts_entities[rts_exp2f], i_mapper_exp },
88 { &rts_entities[rts_exp10f], i_mapper_exp },
89 { &rts_entities[rts_logf], i_mapper_log },
90 { &rts_entities[rts_log2f], i_mapper_log2 },
91 { &rts_entities[rts_log10f], i_mapper_log10 },
92 { &rts_entities[rts_sinf], i_mapper_sin },
93 { &rts_entities[rts_cosf], i_mapper_cos },
94 { &rts_entities[rts_tanf], i_mapper_tan },
95 { &rts_entities[rts_asinf], i_mapper_asin },
96 { &rts_entities[rts_acosf], i_mapper_acos },
97 { &rts_entities[rts_atanf], i_mapper_atan },
98 { &rts_entities[rts_sinhf], i_mapper_sinh },
99 { &rts_entities[rts_coshf], i_mapper_cosh },
100 { &rts_entities[rts_tanhf], i_mapper_tanh },
102 /* long double -> long double */
103 { &rts_entities[rts_fabsl], i_mapper_abs },
104 { &rts_entities[rts_sqrtl], i_mapper_sqrt },
105 { &rts_entities[rts_cbrtl], i_mapper_cbrt },
106 { &rts_entities[rts_powl], i_mapper_pow },
107 { &rts_entities[rts_expl], i_mapper_exp },
108 { &rts_entities[rts_exp2l], i_mapper_exp },
109 { &rts_entities[rts_exp10l], i_mapper_exp },
110 { &rts_entities[rts_logl], i_mapper_log },
111 { &rts_entities[rts_log2l], i_mapper_log2 },
112 { &rts_entities[rts_log10l], i_mapper_log10 },
113 { &rts_entities[rts_sinl], i_mapper_sin },
114 { &rts_entities[rts_cosl], i_mapper_cos },
115 { &rts_entities[rts_tanl], i_mapper_tan },
116 { &rts_entities[rts_asinl], i_mapper_asin },
117 { &rts_entities[rts_acosl], i_mapper_acos },
118 { &rts_entities[rts_atanl], i_mapper_atan },
119 { &rts_entities[rts_sinhl], i_mapper_sinh },
120 { &rts_entities[rts_coshl], i_mapper_cosh },
121 { &rts_entities[rts_tanhl], i_mapper_tanh },
124 { &rts_entities[rts_strcmp], i_mapper_strcmp },
125 { &rts_entities[rts_strncmp], i_mapper_strncmp },
126 { &rts_entities[rts_strcpy], i_mapper_strcpy },
127 { &rts_entities[rts_strlen], i_mapper_strlen },
128 { &rts_entities[rts_memcpy], i_mapper_memcpy },
129 { &rts_entities[rts_mempcpy], i_mapper_mempcpy },
130 { &rts_entities[rts_memmove], i_mapper_memmove },
131 { &rts_entities[rts_memset], i_mapper_memset },
132 { &rts_entities[rts_memcmp], i_mapper_memcmp }
134 i_record rec[sizeof(mapper)/sizeof(mapper[0])];
137 for (i = n_map = 0; i < sizeof(mapper)/sizeof(mapper[0]); ++i) {
138 if (*mapper[i].ent != NULL) {
139 rec[n_map].i_call.kind = INTRINSIC_CALL;
140 rec[n_map].i_call.i_ent = *mapper[i].ent;
141 rec[n_map].i_call.i_mapper = mapper[i].func;
142 rec[n_map].i_call.ctx = NULL;
143 rec[n_map].i_call.link = NULL;
149 lower_intrinsics(rec, n_map, /* part_block_used=*/0);
152 static int *irg_dump_no;
153 static int firm_const_exists;
155 static void do_optimize_funccalls(void)
157 optimize_funccalls(firm_const_exists, NULL);
160 static void do_gcse(ir_graph *irg)
162 set_opt_global_cse(1);
163 optimize_graph_df(irg);
165 set_opt_global_cse(0);
168 static void do_lower_highlevel(ir_graph *irg)
170 lower_highlevel_graph(irg, firm_opt.lower_bitfields);
173 static void do_stred(ir_graph *irg)
175 opt_osr(irg, osr_flag_default | osr_flag_keep_reg_pressure | osr_flag_ignore_x86_shift);
178 static void after_inline_opt(ir_graph *irg)
180 do_irg_opt(irg, "scalar-replace");
181 do_irg_opt(irg, "local");
182 do_irg_opt(irg, "control-flow");
183 do_irg_opt(irg, "combo");
186 static void do_inline(void)
188 inline_functions(firm_opt.inline_maxsize, firm_opt.inline_threshold,
192 static void do_cloning(void)
194 proc_cloning((float) firm_opt.clone_threshold);
197 static void do_lower_mux(ir_graph *irg)
199 lower_mux(irg, NULL);
202 static void do_lower_for_target(void)
204 const backend_params *be_params = be_get_backend_param();
205 be_params->lower_for_target();
208 static void do_vrp(ir_graph *irg)
213 typedef enum opt_target {
214 OPT_TARGET_IRG, /**< optimization function works on a single graph */
215 OPT_TARGET_IRP /**< optimization function works on the complete program */
218 typedef enum opt_flags {
220 OPT_FLAG_ENABLED = 1 << 0, /**< enable the optimization */
221 OPT_FLAG_NO_DUMP = 1 << 1, /**< don't dump after transformation */
222 OPT_FLAG_NO_VERIFY = 1 << 2, /**< don't verify after transformation */
223 OPT_FLAG_HIDE_OPTIONS = 1 << 3, /**< do not automatically process
224 -foptions for this transformation */
225 OPT_FLAG_ESSENTIAL = 1 << 4, /**< output won't work without this pass
226 so we need it even with -O0 */
229 typedef void (*transform_irg_func)(ir_graph *irg);
230 typedef void (*transform_irp_func)(void);
236 transform_irg_func transform_irg;
237 transform_irp_func transform_irp;
239 const char *description;
243 static opt_config_t opts[] = {
244 #define IRG(a, b, c, d) { OPT_TARGET_IRG, a, .u.transform_irg = (transform_irg_func)b, c, d }
245 #define IRP(a, b, c, d) { OPT_TARGET_IRP, a, .u.transform_irp = b, c, d }
246 IRG("bool", opt_bool, "bool simplification", OPT_FLAG_NONE),
247 IRG("combo", combo, "combined CCE, UCE and GVN", OPT_FLAG_NONE),
248 IRG("confirm", construct_confirms, "confirm optimisation", OPT_FLAG_HIDE_OPTIONS),
249 IRG("control-flow", optimize_cf, "optimization of control-flow", OPT_FLAG_HIDE_OPTIONS),
250 IRG("dead", dead_node_elimination, "dead node elimination", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
251 IRG("deconv", conv_opt, "conv node elimination", OPT_FLAG_NONE),
252 IRG("fp-vrp", fixpoint_vrp, "fixpoint value range propagation", OPT_FLAG_NONE),
253 IRG("frame", opt_frame_irg, "remove unused frame entities", OPT_FLAG_NONE),
254 IRG("gcse", do_gcse, "global common subexpression elimination", OPT_FLAG_NONE),
255 IRG("gvn-pre", do_gvn_pre, "global value numbering partial redundancy elimination", OPT_FLAG_NONE),
256 IRG("if-conversion", opt_if_conv, "if-conversion", OPT_FLAG_NONE),
257 IRG("invert-loops", do_loop_inversion, "loop inversion", OPT_FLAG_NONE),
258 IRG("ivopts", do_stred, "induction variable strength reduction", OPT_FLAG_NONE),
259 IRG("local", optimize_graph_df, "local graph optimizations", OPT_FLAG_HIDE_OPTIONS),
260 IRG("lower", do_lower_highlevel, "lowering", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL),
261 IRG("lower-mux", do_lower_mux, "mux lowering", OPT_FLAG_NONE),
262 IRG("opt-load-store", optimize_load_store, "load store optimization", OPT_FLAG_NONE),
263 IRG("opt-tail-rec", opt_tail_rec_irg, "tail-recursion eliminiation", OPT_FLAG_NONE),
264 IRG("parallelize-mem", opt_parallelize_mem, "parallelize memory", OPT_FLAG_NONE),
265 IRG("place", place_code, "code placement", OPT_FLAG_NONE),
266 IRG("reassociation", optimize_reassociation, "reassociation", OPT_FLAG_NONE),
267 IRG("remove-confirms", remove_confirms, "confirm removal", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
268 IRG("remove-phi-cycles", remove_phi_cycles, "removal of phi cycles", OPT_FLAG_HIDE_OPTIONS),
269 IRG("scalar-replace", scalar_replacement_opt, "scalar replacement", OPT_FLAG_NONE),
270 IRG("shape-blocks", shape_blocks, "block shaping", OPT_FLAG_NONE),
271 IRG("thread-jumps", opt_jumpthreading, "path-sensitive jumpthreading", OPT_FLAG_NONE),
272 IRG("unroll-loops", do_loop_unrolling, "loop unrolling", OPT_FLAG_NONE),
273 IRG("vrp", do_vrp, "value range propagation", OPT_FLAG_NONE),
274 IRP("inline", do_inline, "inlining", OPT_FLAG_NONE),
275 IRP("lower-const", lower_const_code, "lowering of constant code", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY | OPT_FLAG_ESSENTIAL),
276 IRP("target-lowering", do_lower_for_target, "lowering necessary for target architecture", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL),
277 IRP("opt-func-call", do_optimize_funccalls, "function call optimization", OPT_FLAG_NONE),
278 IRP("opt-proc-clone", do_cloning, "procedure cloning", OPT_FLAG_NONE),
279 IRP("remove-unused", garbage_collect_entities, "removal of unused functions/variables", OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
280 IRP("rts", rts_map, "optimization of known library functions", OPT_FLAG_HIDE_OPTIONS),
284 static const int n_opts = sizeof(opts) / sizeof(opts[0]);
285 ir_timer_t *timers[sizeof(opts)/sizeof(opts[0])];
287 static opt_config_t *get_opt(const char *name)
290 for (i = 0; i < n_opts; ++i) {
291 opt_config_t *config = &opts[i];
292 if (strcmp(config->name, name) == 0)
299 static void set_opt_enabled(const char *name, bool enabled)
301 opt_config_t *config = get_opt(name);
302 config->flags = (config->flags & ~OPT_FLAG_ENABLED)
303 | (enabled ? OPT_FLAG_ENABLED : 0);
306 static bool get_opt_enabled(const char *name)
308 opt_config_t *config = get_opt(name);
309 return (config->flags & OPT_FLAG_ENABLED) != 0;
313 * perform an optimisation on a single graph
315 * @return true if something changed, false otherwise
317 static bool do_irg_opt(ir_graph *irg, const char *name)
320 opt_config_t *config = get_opt(name);
321 size_t n = config - opts;
322 assert(config != NULL);
323 assert(config->target == OPT_TARGET_IRG);
324 if (! (config->flags & OPT_FLAG_ENABLED))
327 old_irg = current_ir_graph;
328 current_ir_graph = irg;
330 timer_push(timers[n]);
331 config->u.transform_irg(irg);
332 timer_pop(timers[n]);
334 if (firm_dump.all_phases && firm_dump.ir_graph) {
335 dump_ir_graph(irg, name);
338 if (firm_opt.check_all) {
339 timer_push(t_verify);
340 irg_verify(irg, VERIFY_ENFORCE_SSA);
344 current_ir_graph = old_irg;
348 static void do_irp_opt(const char *name)
350 opt_config_t *config = get_opt(name);
351 size_t n = config - opts;
352 assert(config->target == OPT_TARGET_IRP);
353 if (! (config->flags & OPT_FLAG_ENABLED))
356 timer_push(timers[n]);
357 config->u.transform_irp();
358 timer_pop(timers[n]);
360 if (firm_dump.ir_graph && firm_dump.all_phases) {
362 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
363 ir_graph *irg = get_irp_irg(i);
364 dump_ir_graph(irg, name);
368 if (firm_opt.check_all) {
370 timer_push(t_verify);
371 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
372 irg_verify(get_irp_irg(i), VERIFY_ENFORCE_SSA);
379 * Enable transformations which should be always safe (and cheap) to perform
381 static void enable_safe_defaults(void)
383 set_opt_enabled("remove-unused", true);
384 set_opt_enabled("opt-tail-rec", true);
385 set_opt_enabled("opt-func-call", true);
386 set_opt_enabled("reassociation", true);
387 set_opt_enabled("control-flow", true);
388 set_opt_enabled("local", true);
389 set_opt_enabled("lower-const", true);
390 set_opt_enabled("scalar-replace", true);
391 set_opt_enabled("place", true);
392 set_opt_enabled("confirm", true);
393 set_opt_enabled("opt-load-store", true);
394 set_opt_enabled("lower", true);
395 set_opt_enabled("deconv", true);
396 set_opt_enabled("remove-confirms", true);
397 set_opt_enabled("ivopts", true);
398 set_opt_enabled("dead", true);
399 set_opt_enabled("remove-phi-cycles", true);
400 set_opt_enabled("frame", true);
401 set_opt_enabled("combo", true);
402 set_opt_enabled("invert-loops", true);
403 set_opt_enabled("target-lowering", true);
407 * run all the Firm optimizations
409 * @param input_filename the name of the (main) source file
411 static void do_firm_optimizations(const char *input_filename)
416 set_opt_alias_analysis(firm_opt.alias_analysis);
418 aa_opt = aa_opt_no_opt;
419 if (firm_opt.strict_alias)
420 aa_opt |= aa_opt_type_based | aa_opt_byte_type_may_alias;
421 if (firm_opt.no_alias)
422 aa_opt = aa_opt_no_alias;
424 set_irp_memory_disambiguator_options(aa_opt);
426 /* parameter passing code should set them directly sometime... */
427 set_opt_enabled("rts", !firm_opt.freestanding);
428 set_opt_enabled("gcse", firm_opt.gcse);
429 set_opt_enabled("place", !firm_opt.gcse);
430 set_opt_enabled("confirm", firm_opt.confirm);
431 set_opt_enabled("remove-confirms", firm_opt.confirm);
433 /* osr supersedes remove_phi_cycles */
434 if (get_opt_enabled("ivopts"))
435 set_opt_enabled("remove-phi-cycles", false);
437 timer_start(t_all_opt);
441 /* first step: kill dead code */
442 for (i = 0; i < get_irp_n_irgs(); i++) {
443 ir_graph *irg = get_irp_irg(i);
444 do_irg_opt(irg, "combo");
445 do_irg_opt(irg, "local");
446 do_irg_opt(irg, "control-flow");
449 do_irp_opt("remove-unused");
450 for (i = 0; i < get_irp_n_irgs(); ++i) {
451 ir_graph *irg = get_irp_irg(i);
452 do_irg_opt(irg, "opt-tail-rec");
454 do_irp_opt("opt-func-call");
455 do_irp_opt("lower-const");
457 for (i = 0; i < get_irp_n_irgs(); i++) {
458 ir_graph *irg = get_irp_irg(i);
460 do_irg_opt(irg, "scalar-replace");
461 do_irg_opt(irg, "invert-loops");
462 do_irg_opt(irg, "unroll-loops");
463 do_irg_opt(irg, "local");
464 do_irg_opt(irg, "reassociation");
465 do_irg_opt(irg, "local");
466 do_irg_opt(irg, "gcse");
468 if (firm_opt.confirm) {
469 /* Confirm construction currently can only handle blocks with only
470 one control flow predecessor. Calling optimize_cf here removes
471 Bad predecessors and help the optimization of switch constructs.
473 do_irg_opt(irg, "control-flow");
474 do_irg_opt(irg, "confirm");
475 do_irg_opt(irg, "vrp");
476 do_irg_opt(irg, "local");
479 do_irg_opt(irg, "control-flow");
480 do_irg_opt(irg, "opt-load-store");
481 do_irg_opt(irg, "fp-vrp");
482 do_irg_opt(irg, "lower");
483 do_irg_opt(irg, "deconv");
484 do_irg_opt(irg, "thread-jumps");
485 do_irg_opt(irg, "remove-confirms");
486 do_irg_opt(irg, "gvn-pre");
487 do_irg_opt(irg, "place");
488 do_irg_opt(irg, "control-flow");
490 if (do_irg_opt(irg, "if-conversion")) {
491 do_irg_opt(irg, "local");
492 do_irg_opt(irg, "control-flow");
494 /* this doesn't make too much sense but tests the mux destruction... */
495 do_irg_opt(irg, "lower-mux");
497 do_irg_opt(irg, "bool");
498 do_irg_opt(irg, "shape-blocks");
499 do_irg_opt(irg, "ivopts");
500 do_irg_opt(irg, "local");
501 do_irg_opt(irg, "dead");
502 do_irg_opt(irg, "frame");
505 do_irp_opt("inline");
506 do_irp_opt("opt-proc-clone");
508 for (i = 0; i < get_irp_n_irgs(); i++) {
509 ir_graph *irg = get_irp_irg(i);
510 do_irg_opt(irg, "local");
511 do_irg_opt(irg, "control-flow");
512 do_irg_opt(irg, "thread-jumps");
513 do_irg_opt(irg, "local");
514 do_irg_opt(irg, "control-flow");
516 if( do_irg_opt(irg, "vrp") ) { // if vrp is enabled
517 do_irg_opt(irg, "local");
518 do_irg_opt(irg, "vrp");
519 do_irg_opt(irg, "local");
520 do_irg_opt(irg, "vrp");
524 if (firm_dump.ir_graph) {
525 /* recompute backedges for nicer dumps */
526 for (i = 0; i < get_irp_n_irgs(); i++)
527 construct_cf_backedges(get_irp_irg(i));
532 if (firm_dump.statistic & STAT_AFTER_OPT)
533 stat_dump_snapshot(input_filename, "opt");
535 timer_stop(t_all_opt);
541 * @param input_filename the name of the (main) source file
543 static void do_firm_lowering(const char *input_filename)
547 do_irp_opt("target-lowering");
549 if (firm_dump.statistic & STAT_AFTER_LOWER)
550 stat_dump_snapshot(input_filename, "low");
554 if (firm_opt.enabled) {
555 timer_start(t_all_opt);
557 /* run reassociation first on all graphs BEFORE the architecture
558 dependent optimizations are enabled */
559 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
560 ir_graph *irg = get_irp_irg(i);
561 do_irg_opt(irg, "reassociation");
564 /* enable architecture dependent optimizations */
565 arch_dep_set_opts((arch_dep_opts_t)
566 ((firm_opt.muls ? arch_dep_mul_to_shift : arch_dep_none) |
567 (firm_opt.divs ? arch_dep_div_by_const : arch_dep_none) |
568 (firm_opt.mods ? arch_dep_mod_by_const : arch_dep_none) ));
570 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
571 ir_graph *irg = get_irp_irg(i);
573 do_irg_opt(irg, "local");
574 do_irg_opt(irg, "gcse");
575 do_irg_opt(irg, "control-flow");
576 do_irg_opt(irg, "opt-load-store");
577 do_irg_opt(irg, "local");
578 do_irg_opt(irg, "control-flow");
580 if (do_irg_opt(irg, "vrp")) {
581 do_irg_opt(irg, "local");
582 do_irg_opt(irg, "control-flow");
583 do_irg_opt(irg, "vrp");
584 do_irg_opt(irg, "local");
585 do_irg_opt(irg, "control-flow");
588 if (do_irg_opt(irg, "if-conversion")) {
589 do_irg_opt(irg, "local");
590 do_irg_opt(irg, "control-flow");
593 do_irg_opt(irg, "parallelize-mem");
595 timer_stop(t_all_opt);
597 do_irp_opt("remove-unused");
603 mark_private_methods();
605 /* set the phase to low */
606 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
607 ir_graph *irg = get_irp_irg(i);
608 set_irg_phase_state(irg, phase_low);
610 set_irp_phase_state(phase_low);
612 if (firm_dump.statistic & STAT_FINAL) {
613 stat_dump_snapshot(input_filename, "final");
618 * Initialize for the Firm-generating back end.
620 void gen_firm_init(void)
622 unsigned pattern = 0;
625 for (i = 0; i < n_opts; ++i) {
626 timers[i] = ir_timer_new();
627 timer_register(timers[i], opts[i].description);
629 t_verify = ir_timer_new();
630 timer_register(t_verify, "Firm: verify pass");
631 t_vcg_dump = ir_timer_new();
632 timer_register(t_vcg_dump, "Firm: vcg dumping");
633 t_all_opt = ir_timer_new();
634 timer_register(t_all_opt, "Firm: all optimizations");
636 if (firm_dump.stat_pattern)
637 pattern |= FIRMSTAT_PATTERN_ENABLED;
639 if (firm_dump.stat_dag)
640 pattern |= FIRMSTAT_COUNT_DAG;
643 firm_init_stat(firm_dump.statistic == STAT_NONE ?
644 0 : FIRMSTAT_ENABLED | FIRMSTAT_COUNT_STRONG_OP
645 | FIRMSTAT_COUNT_CONSTS | pattern);
647 edges_init_dbg(firm_opt.verify_edges);
649 /* Sel node cannot produce NULL pointers */
650 set_opt_sel_based_null_check_elim(1);
652 /* dynamic dispatch works currently only if whole world scenarios */
653 set_opt_dyn_meth_dispatch(0);
655 /* do not run architecture dependent optimizations in building phase */
656 arch_dep_set_opts(arch_dep_none);
658 do_node_verification((firm_verification_t) firm_opt.verify);
659 if (firm_dump.filter != NULL)
660 ir_set_dump_filter(firm_dump.filter);
662 ir_add_dump_flags(ir_dump_flag_group_extbb);
663 if (firm_dump.no_blocks)
664 ir_remove_dump_flags(ir_dump_flag_blocks_as_subgraphs);
666 if (firm_opt.enabled) {
668 set_opt_constant_folding(firm_opt.const_folding);
669 set_opt_algebraic_simplification(firm_opt.const_folding);
670 set_opt_cse(firm_opt.cse);
671 set_opt_global_cse(0);
672 set_opt_unreachable_code(1);
673 set_opt_control_flow(firm_opt.control_flow);
674 set_opt_control_flow_weak_simplification(1);
675 set_opt_control_flow_strong_simplification(1);
682 * Called, after the Firm generation is completed,
683 * do all optimizations and backend call here.
685 * @param out a file handle for the output, may be NULL
686 * @param input_filename the name of the (main) source file
687 * @param c_mode non-zero if "C" was compiled
688 * @param new_firm_const_exists non-zero, if the const attribute was used on functions
690 void gen_firm_finish(FILE *out, const char *input_filename,
691 int new_firm_const_exists)
696 if (firm_opt.enable_statev) {
698 snprintf(buf, sizeof(buf), "%s.ev", input_filename);
699 ir_stat_ev_begin(input_filename, firm_opt.statev_filter);
700 ir_stat_ev_compilation_unit(input_filename);
704 firm_const_exists = new_firm_const_exists;
706 /* the general for dumping option must be set, or the others will not work*/
708 = (a_byte) (firm_dump.ir_graph | firm_dump.all_phases | firm_dump.extbb);
710 ir_add_dump_flags(ir_dump_flag_keepalive_edges
711 | ir_dump_flag_consts_local | ir_dump_flag_dominance);
712 ir_remove_dump_flags(ir_dump_flag_loops | ir_dump_flag_ld_names);
714 /* FIXME: cloning might ADD new graphs. */
715 irg_dump_no = calloc(get_irp_last_idx(), sizeof(*irg_dump_no));
717 if (firm_dump.all_types) {
718 dump_ir_prog_ext(dump_typegraph, "types.vcg");
721 /* finalize all graphs */
722 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
723 ir_graph *irg = get_irp_irg(i);
724 irg_finalize_cons(irg);
728 timer_push(t_verify);
732 /* all graphs are finalized, set the irp phase to high */
733 set_irp_phase_state(phase_high);
735 /* BEWARE: kill unreachable code before doing compound lowering */
736 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
737 ir_graph *irg = get_irp_irg(i);
738 do_irg_opt(irg, "control-flow");
741 /* lower all compound call return values */
742 lower_compound_params();
744 /* lower copyb nodes */
745 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
746 ir_graph *irg = get_irp_irg(i);
747 lower_CopyB(irg, 128, 4);
750 if (firm_dump.statistic & STAT_BEFORE_OPT) {
751 stat_dump_snapshot(input_filename, "noopt");
754 if (firm_opt.enabled)
755 do_firm_optimizations(input_filename);
758 do_firm_lowering(input_filename);
760 /* set the phase to low */
761 for (i = get_irp_n_irgs() - 1; i >= 0; --i)
762 set_irg_phase_state(get_irp_irg(i), phase_low);
764 if (firm_dump.statistic & STAT_FINAL_IR)
765 stat_dump_snapshot(input_filename, "final-ir");
767 /* run the code generator */
768 if (firm_be_opt.selection != BE_NONE)
769 do_codegen(out, input_filename);
771 if (firm_dump.statistic & STAT_FINAL)
772 stat_dump_snapshot(input_filename, "final");
775 void disable_all_opts(void)
777 for (int i = 0; i < n_opts; ++i) {
778 opt_config_t *config = &opts[i];
779 if (config->flags & OPT_FLAG_ESSENTIAL) {
780 config->flags |= OPT_FLAG_ENABLED;
782 config->flags &= ~OPT_FLAG_ENABLED;
787 int firm_opt_option(const char *opt)
790 if (strncmp(opt, "no-", 3) == 0) {
795 opt_config_t *config = get_opt(opt);
796 if (config == NULL || (config->flags & OPT_FLAG_HIDE_OPTIONS))
799 config->flags &= ~OPT_FLAG_ENABLED;
800 config->flags |= enable ? OPT_FLAG_ENABLED : 0;
804 void firm_opt_option_help(void)
808 for (i = 0; i < n_opts; ++i) {
812 const opt_config_t *config = &opts[i];
813 if (config->flags & OPT_FLAG_HIDE_OPTIONS)
816 snprintf(buf2, sizeof(buf2), "firm: enable %s", config->description);
817 print_option_help(config->name, buf2);
818 snprintf(buf, sizeof(buf), "no-%s", config->name);
819 snprintf(buf2, sizeof(buf2), "firm: disable %s", config->description);
820 print_option_help(buf, buf2);
825 * Do very early initializations
827 void firm_early_init(void)
829 /* arg: need this here for command line options */
832 enable_safe_defaults();