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 #if defined(_DEBUG) || defined(FIRM_DEBUG)
26 #define DBG(x) dbg_printf x
28 #define DBG(x) ((void)0)
29 #endif /* _DEBUG || FIRM_DEBUG */
31 static ir_timer_t *t_vcg_dump;
32 static ir_timer_t *t_verify;
33 static ir_timer_t *t_all_opt;
34 static bool do_irg_opt(ir_graph *irg, const char *name);
36 /** dump all the graphs depending on cond */
38 static void dump_all(const char *suffix) {
39 if (firm_dump.ir_graph) {
40 timer_push(t_vcg_dump);
41 if (firm_dump.no_blocks)
42 dump_all_ir_graphs(dump_ir_graph, suffix);
43 else if (firm_dump.extbb)
44 dump_all_ir_graphs(dump_ir_extblock_graph, suffix);
46 dump_all_ir_graphs(dump_ir_block_graph, suffix);
47 timer_pop(t_vcg_dump);
51 /* set by the backend parameters */
52 static const ir_settings_arch_dep_t *ad_param = NULL;
53 static create_intrinsic_fkt *arch_create_intrinsic = NULL;
54 static void *create_intrinsic_ctx = NULL;
55 static const ir_settings_if_conv_t *if_conv_info = NULL;
57 /* entities of runtime functions */
58 ir_entity_ptr rts_entities[rts_max];
61 * factory for setting architecture dependent parameters
63 static const ir_settings_arch_dep_t *arch_factory(void)
65 static const ir_settings_arch_dep_t param = {
66 1, /* also use subs */
67 4, /* maximum shifts */
68 31, /* maximum shift amount */
69 NULL, /* use default evaluator */
73 32 /* Mulh allowed up to 32 bit */
76 return ad_param ? ad_param : ¶m;
80 * Map runtime functions.
82 static void rts_map(void) {
84 ir_entity_ptr *ent; /**< address of the rts entity */
85 i_mapper_func func; /**< mapper function. */
88 { &rts_entities[rts_abs], i_mapper_abs },
89 { &rts_entities[rts_labs], i_mapper_abs },
90 { &rts_entities[rts_llabs], i_mapper_abs },
91 { &rts_entities[rts_imaxabs], i_mapper_abs },
93 /* double -> double */
94 { &rts_entities[rts_fabs], i_mapper_abs },
95 { &rts_entities[rts_sqrt], i_mapper_sqrt },
96 { &rts_entities[rts_cbrt], i_mapper_cbrt },
97 { &rts_entities[rts_pow], i_mapper_pow },
98 { &rts_entities[rts_exp], i_mapper_exp },
99 { &rts_entities[rts_exp2], i_mapper_exp },
100 { &rts_entities[rts_exp10], i_mapper_exp },
101 { &rts_entities[rts_log], i_mapper_log },
102 { &rts_entities[rts_log2], i_mapper_log2 },
103 { &rts_entities[rts_log10], i_mapper_log10 },
104 { &rts_entities[rts_sin], i_mapper_sin },
105 { &rts_entities[rts_cos], i_mapper_cos },
106 { &rts_entities[rts_tan], i_mapper_tan },
107 { &rts_entities[rts_asin], i_mapper_asin },
108 { &rts_entities[rts_acos], i_mapper_acos },
109 { &rts_entities[rts_atan], i_mapper_atan },
110 { &rts_entities[rts_sinh], i_mapper_sinh },
111 { &rts_entities[rts_cosh], i_mapper_cosh },
112 { &rts_entities[rts_tanh], i_mapper_tanh },
115 { &rts_entities[rts_fabsf], i_mapper_abs },
116 { &rts_entities[rts_sqrtf], i_mapper_sqrt },
117 { &rts_entities[rts_cbrtf], i_mapper_cbrt },
118 { &rts_entities[rts_powf], i_mapper_pow },
119 { &rts_entities[rts_expf], i_mapper_exp },
120 { &rts_entities[rts_exp2f], i_mapper_exp },
121 { &rts_entities[rts_exp10f], i_mapper_exp },
122 { &rts_entities[rts_logf], i_mapper_log },
123 { &rts_entities[rts_log2f], i_mapper_log2 },
124 { &rts_entities[rts_log10f], i_mapper_log10 },
125 { &rts_entities[rts_sinf], i_mapper_sin },
126 { &rts_entities[rts_cosf], i_mapper_cos },
127 { &rts_entities[rts_tanf], i_mapper_tan },
128 { &rts_entities[rts_asinf], i_mapper_asin },
129 { &rts_entities[rts_acosf], i_mapper_acos },
130 { &rts_entities[rts_atanf], i_mapper_atan },
131 { &rts_entities[rts_sinhf], i_mapper_sinh },
132 { &rts_entities[rts_coshf], i_mapper_cosh },
133 { &rts_entities[rts_tanhf], i_mapper_tanh },
135 /* long double -> long double */
136 { &rts_entities[rts_fabsl], i_mapper_abs },
137 { &rts_entities[rts_sqrtl], i_mapper_sqrt },
138 { &rts_entities[rts_cbrtl], i_mapper_cbrt },
139 { &rts_entities[rts_powl], i_mapper_pow },
140 { &rts_entities[rts_expl], i_mapper_exp },
141 { &rts_entities[rts_exp2l], i_mapper_exp },
142 { &rts_entities[rts_exp10l], i_mapper_exp },
143 { &rts_entities[rts_logl], i_mapper_log },
144 { &rts_entities[rts_log2l], i_mapper_log2 },
145 { &rts_entities[rts_log10l], i_mapper_log10 },
146 { &rts_entities[rts_sinl], i_mapper_sin },
147 { &rts_entities[rts_cosl], i_mapper_cos },
148 { &rts_entities[rts_tanl], i_mapper_tan },
149 { &rts_entities[rts_asinl], i_mapper_asin },
150 { &rts_entities[rts_acosl], i_mapper_acos },
151 { &rts_entities[rts_atanl], i_mapper_atan },
152 { &rts_entities[rts_sinhl], i_mapper_sinh },
153 { &rts_entities[rts_coshl], i_mapper_cosh },
154 { &rts_entities[rts_tanhl], i_mapper_tanh },
157 { &rts_entities[rts_strcmp], i_mapper_strcmp },
158 { &rts_entities[rts_strncmp], i_mapper_strncmp },
159 { &rts_entities[rts_strcpy], i_mapper_strcpy },
160 { &rts_entities[rts_strlen], i_mapper_strlen },
161 { &rts_entities[rts_memcpy], i_mapper_memcpy },
162 { &rts_entities[rts_mempcpy], i_mapper_mempcpy },
163 { &rts_entities[rts_memmove], i_mapper_memmove },
164 { &rts_entities[rts_memset], i_mapper_memset },
165 { &rts_entities[rts_memcmp], i_mapper_memcmp }
167 i_record rec[sizeof(mapper)/sizeof(mapper[0])];
170 for (i = n_map = 0; i < sizeof(mapper)/sizeof(mapper[0]); ++i) {
171 if (*mapper[i].ent != NULL) {
172 rec[n_map].i_call.kind = INTRINSIC_CALL;
173 rec[n_map].i_call.i_ent = *mapper[i].ent;
174 rec[n_map].i_call.i_mapper = mapper[i].func;
175 rec[n_map].i_call.ctx = NULL;
176 rec[n_map].i_call.link = NULL;
182 lower_intrinsics(rec, n_map, /* part_block_used=*/0);
185 static int *irg_dump_no;
187 static void dump_graph_count(ir_graph *const irg, const char *const suffix)
190 snprintf(name, sizeof(name), "-%02d_%s", irg_dump_no[get_irg_idx(irg)]++,
193 timer_push(t_vcg_dump);
194 if (firm_dump.no_blocks)
195 dump_ir_graph(irg, name);
196 else if (firm_dump.extbb)
197 dump_ir_extblock_graph(irg, name);
199 dump_ir_block_graph(irg, name);
200 timer_pop(t_vcg_dump);
203 static int firm_const_exists;
205 static void do_optimize_funccalls(void)
207 optimize_funccalls(firm_const_exists, NULL);
210 static void do_gcse(ir_graph *irg)
212 set_opt_global_cse(1);
213 optimize_graph_df(irg);
215 set_opt_global_cse(0);
218 static void do_lower_highlevel(ir_graph *irg)
220 lower_highlevel_graph(irg, firm_opt.lower_bitfields);
223 static void do_if_conv(ir_graph *irg)
225 opt_if_conv(irg, if_conv_info);
228 static void do_stred(ir_graph *irg)
230 opt_osr(irg, osr_flag_default | osr_flag_keep_reg_pressure | osr_flag_ignore_x86_shift);
233 static void after_inline_opt(ir_graph *irg)
235 do_irg_opt(irg, "scalar-replace");
236 do_irg_opt(irg, "local");
237 do_irg_opt(irg, "control-flow");
238 do_irg_opt(irg, "combo");
241 static void do_inline(void)
243 inline_functions(firm_opt.inline_maxsize, firm_opt.inline_threshold,
247 static void do_cloning(void)
249 proc_cloning((float) firm_opt.clone_threshold);
252 static void do_lower_switch(ir_graph *irg)
254 lower_switch(irg, firm_opt.spare_size);
257 static void do_lower_mux(ir_graph *irg)
259 lower_mux(irg, NULL);
262 static void do_lower_dw_ops(void)
264 lwrdw_param_t init = {
267 get_atomic_mode(ATOMIC_TYPE_LONGLONG),
268 get_atomic_mode(ATOMIC_TYPE_ULONGLONG),
269 get_atomic_mode(ATOMIC_TYPE_INT),
270 get_atomic_mode(ATOMIC_TYPE_UINT),
271 def_create_intrinsic_fkt,
275 if (arch_create_intrinsic) {
276 init.create_intrinsic = arch_create_intrinsic;
277 init.ctx = create_intrinsic_ctx;
282 typedef enum opt_target {
283 OPT_TARGET_IRG, /**< optimization function works on a single graph */
284 OPT_TARGET_IRP /**< optimization function works on the complete program */
287 typedef enum opt_flags {
289 OPT_FLAG_ENABLED = 1 << 0, /**< enable the optimization */
290 OPT_FLAG_NO_DUMP = 1 << 1, /**< don't dump after transformation */
291 OPT_FLAG_NO_VERIFY = 1 << 2, /**< don't verify after transformation */
292 OPT_FLAG_HIDE_OPTIONS = 1 << 3, /**< do not automatically process
293 -foptions for this transformation */
294 OPT_FLAG_ESSENTIAL = 1 << 4, /**< output won't work without this pass
295 so we need it even with -O0 */
298 typedef void (*transform_irg_func)(ir_graph *irg);
299 typedef void (*transform_irp_func)(void);
300 typedef void (*func_ptr_t)(void);
306 const char *description;
310 static opt_config_t opts[] = {
311 { OPT_TARGET_IRP, "rts", (func_ptr_t) rts_map, "optimization of known library functions", OPT_FLAG_HIDE_OPTIONS },
312 { OPT_TARGET_IRG, "combo", (func_ptr_t) combo, "combined CCE, UCE and GVN", OPT_FLAG_NONE},
313 { OPT_TARGET_IRG, "control-flow", (func_ptr_t) optimize_cf, "optimization of control-flow", OPT_FLAG_HIDE_OPTIONS },
314 { OPT_TARGET_IRG, "local", (func_ptr_t) optimize_graph_df, "local graph optimizations", OPT_FLAG_HIDE_OPTIONS },
315 { OPT_TARGET_IRP, "remove-unused", (func_ptr_t) garbage_collect_entities,"removal of unused functions/variables", OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY },
316 { OPT_TARGET_IRP, "opt-tail-rec", (func_ptr_t) opt_tail_recursion, "tail-recursion eliminiation", OPT_FLAG_NONE },
317 { OPT_TARGET_IRP, "opt-func-call", (func_ptr_t) do_optimize_funccalls, "function call optimization", OPT_FLAG_NONE },
318 { OPT_TARGET_IRG, "lower", (func_ptr_t) do_lower_highlevel, "lowering", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL },
319 { OPT_TARGET_IRP, "lower-const", (func_ptr_t) lower_const_code, "lowering of constant code", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY | OPT_FLAG_ESSENTIAL },
320 { OPT_TARGET_IRP, "lower-dw", (func_ptr_t) do_lower_dw_ops, "lowering of doubleword operations", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL },
321 { OPT_TARGET_IRG, "lower-switch", (func_ptr_t) do_lower_switch, "switch lowering", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL },
322 { OPT_TARGET_IRG, "one-return", (func_ptr_t) normalize_one_return, "normalisation to 1 return", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY },
323 { OPT_TARGET_IRG, "scalar-replace", (func_ptr_t) scalar_replacement_opt, "scalar replacement", OPT_FLAG_NONE },
324 { OPT_TARGET_IRG, "reassociation", (func_ptr_t) optimize_reassociation, "reassociation", OPT_FLAG_NONE },
325 { OPT_TARGET_IRG, "gcse", (func_ptr_t) do_gcse, "global common subexpression elimination", OPT_FLAG_NONE },
326 { OPT_TARGET_IRG, "place", (func_ptr_t) place_code, "code placement", OPT_FLAG_NONE },
327 { OPT_TARGET_IRG, "confirm", (func_ptr_t) construct_confirms, "confirm optimisation", OPT_FLAG_HIDE_OPTIONS },
328 { OPT_TARGET_IRG, "opt-load-store", (func_ptr_t) optimize_load_store, "load store optimization", OPT_FLAG_NONE },
329 { OPT_TARGET_IRG, "parallelize-mem", (func_ptr_t) opt_parallelize_mem, "parallelize memory", OPT_FLAG_NONE },
330 { OPT_TARGET_IRG, "deconv", (func_ptr_t) conv_opt, "conv node elimination", OPT_FLAG_NONE },
331 { OPT_TARGET_IRG, "thread-jumps", (func_ptr_t) opt_jumpthreading, "path-sensitive jumpthreading", OPT_FLAG_NONE },
332 { OPT_TARGET_IRG, "remove-confirms", (func_ptr_t) remove_confirms, "confirm removal", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY },
333 { OPT_TARGET_IRG, "gvn-pre", (func_ptr_t) do_gvn_pre, "global value numbering partial redundancy elimination", OPT_FLAG_NONE },
334 { OPT_TARGET_IRG, "if-conversion", (func_ptr_t) do_if_conv, "if-conversion", OPT_FLAG_NONE },
335 { OPT_TARGET_IRG, "bool", (func_ptr_t) opt_bool, "bool simplification", OPT_FLAG_NONE },
336 { OPT_TARGET_IRG, "shape-blocks", (func_ptr_t) shape_blocks, "block shaping", OPT_FLAG_NONE },
337 { OPT_TARGET_IRG, "ivopts", (func_ptr_t) do_stred, "induction variable strength reduction", OPT_FLAG_NONE },
338 { OPT_TARGET_IRG, "remove-phi-cycles", (func_ptr_t) remove_phi_cycles, "removal of phi cycles", OPT_FLAG_HIDE_OPTIONS },
339 { OPT_TARGET_IRG, "dead", (func_ptr_t) dead_node_elimination, "dead node elimination", OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY },
340 { OPT_TARGET_IRP, "inline", (func_ptr_t) do_inline, "inlining", OPT_FLAG_NONE },
341 { OPT_TARGET_IRP, "opt-proc-clone", (func_ptr_t) do_cloning, "procedure cloning", OPT_FLAG_NONE },
342 { OPT_TARGET_IRG, "invert-loops", (func_ptr_t) do_loop_inversion, "loop inversion", OPT_FLAG_NONE },
343 { OPT_TARGET_IRG, "unroll-loops", (func_ptr_t) do_loop_unrolling, "loop unrolling", OPT_FLAG_NONE },
344 { OPT_TARGET_IRG, "lower-mux", (func_ptr_t) do_lower_mux, "mux lowering", OPT_FLAG_NONE },
346 static const int n_opts = sizeof(opts) / sizeof(opts[0]);
347 ir_timer_t *timers[sizeof(opts)/sizeof(opts[0])];
349 static opt_config_t *get_opt(const char *name)
352 for (i = 0; i < n_opts; ++i) {
353 opt_config_t *config = &opts[i];
354 if (strcmp(config->name, name) == 0)
361 static void set_opt_enabled(const char *name, bool enabled)
363 opt_config_t *config = get_opt(name);
364 config->flags = (config->flags & ~OPT_FLAG_ENABLED)
365 | (enabled ? OPT_FLAG_ENABLED : 0);
368 static bool get_opt_enabled(const char *name)
370 opt_config_t *config = get_opt(name);
371 return (config->flags & OPT_FLAG_ENABLED) != 0;
375 * perform an optimisation on a single graph
377 * @return true if something changed, false otherwise
379 static bool do_irg_opt(ir_graph *irg, const char *name)
381 transform_irg_func func;
383 opt_config_t *config = get_opt(name);
384 size_t n = config - opts;
385 assert(config != NULL);
386 assert(config->target == OPT_TARGET_IRG);
387 if (! (config->flags & OPT_FLAG_ENABLED))
391 old_irg = current_ir_graph;
392 current_ir_graph = irg;
394 func = (transform_irg_func) config->func;
396 timer_push(timers[n]);
398 timer_pop(timers[n]);
400 if (firm_dump.all_phases && firm_dump.ir_graph) {
401 dump_graph_count(irg, name);
404 if (firm_opt.check_all) {
405 timer_push(t_verify);
406 irg_verify(irg, VRFY_ENFORCE_SSA);
410 current_ir_graph = old_irg;
414 static void do_irp_opt(const char *name)
416 transform_irp_func func;
417 opt_config_t *config = get_opt(name);
418 size_t n = config - opts;
419 assert(config->target == OPT_TARGET_IRP);
420 if (! (config->flags & OPT_FLAG_ENABLED))
423 func = (transform_irp_func) config->func;
425 timer_push(timers[n]);
427 timer_pop(timers[n]);
429 if (firm_dump.ir_graph && firm_dump.all_phases) {
431 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
432 ir_graph *irg = get_irp_irg(i);
433 dump_graph_count(irg, name);
437 if (firm_opt.check_all) {
439 timer_push(t_verify);
440 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
441 irg_verify(get_irp_irg(i), VRFY_ENFORCE_SSA);
448 * Enable transformations which should be always safe (and cheap) to perform
450 static void enable_safe_defaults(void)
452 set_opt_enabled("remove-unused", true);
453 set_opt_enabled("opt-tail-rec", true);
454 set_opt_enabled("opt-func-call", true);
455 set_opt_enabled("reassociation", true);
456 set_opt_enabled("control-flow", true);
457 set_opt_enabled("local", true);
458 set_opt_enabled("lower-const", true);
459 set_opt_enabled("scalar-replace", true);
460 set_opt_enabled("place", true);
461 set_opt_enabled("confirm", true);
462 set_opt_enabled("opt-load-store", true);
463 set_opt_enabled("lower", true);
464 set_opt_enabled("deconv", true);
465 set_opt_enabled("remove-confirms", true);
466 set_opt_enabled("ivopts", true);
467 set_opt_enabled("dead", true);
468 set_opt_enabled("lower-switch", true);
469 set_opt_enabled("remove-phi-cycles", true);
473 * run all the Firm optimizations
475 * @param input_filename the name of the (main) source file
477 static void do_firm_optimizations(const char *input_filename)
482 set_opt_alias_analysis(firm_opt.alias_analysis);
484 aa_opt = aa_opt_no_opt;
485 if (firm_opt.strict_alias)
486 aa_opt |= aa_opt_type_based | aa_opt_byte_type_may_alias;
487 if (firm_opt.no_alias)
488 aa_opt = aa_opt_no_alias;
490 set_irp_memory_disambiguator_options(aa_opt);
492 /* parameter passing code should set them directly sometime... */
493 set_opt_enabled("rts", !firm_opt.freestanding);
494 set_opt_enabled("gcse", firm_opt.gcse);
495 set_opt_enabled("place", !firm_opt.gcse);
496 set_opt_enabled("confirm", firm_opt.confirm);
497 set_opt_enabled("remove-confirms", firm_opt.confirm);
499 /* osr supersedes remove_phi_cycles */
500 if (get_opt_enabled("ivopts"))
501 set_opt_enabled("remove-phi-cycles", false);
503 timer_start(t_all_opt);
507 /* first step: kill dead code */
508 for (i = 0; i < get_irp_n_irgs(); i++) {
509 ir_graph *irg = get_irp_irg(i);
510 do_irg_opt(irg, "combo");
511 do_irg_opt(irg, "local");
512 do_irg_opt(irg, "control-flow");
515 do_irp_opt("remove-unused");
516 do_irp_opt("opt-tail-rec");
517 do_irp_opt("opt-func-call");
518 do_irp_opt("lower-const");
520 for (i = 0; i < get_irp_n_irgs(); i++) {
521 ir_graph *irg = get_irp_irg(i);
523 do_irg_opt(irg, "scalar-replace");
524 do_irg_opt(irg, "invert-loops");
525 do_irg_opt(irg, "unroll-loops");
526 do_irg_opt(irg, "local");
527 do_irg_opt(irg, "reassociation");
528 do_irg_opt(irg, "local");
529 do_irg_opt(irg, "gcse");
531 if (firm_opt.confirm) {
532 /* Confirm construction currently can only handle blocks with only
533 one control flow predecessor. Calling optimize_cf here removes
534 Bad predecessors and help the optimization of switch constructs.
536 do_irg_opt(irg, "control-flow");
537 do_irg_opt(irg, "confirm");
538 do_irg_opt(irg, "local");
541 do_irg_opt(irg, "control-flow");
542 do_irg_opt(irg, "opt-load-store");
543 do_irg_opt(irg, "lower");
544 do_irg_opt(irg, "deconv");
545 do_irg_opt(irg, "thread-jumps");
546 do_irg_opt(irg, "remove-confirms");
547 do_irg_opt(irg, "gvn-pre");
548 do_irg_opt(irg, "place");
549 do_irg_opt(irg, "control-flow");
551 if (do_irg_opt(irg, "if-conversion")) {
552 do_irg_opt(irg, "local");
553 do_irg_opt(irg, "control-flow");
555 /* this doesn't make too much sense but tests the mux destruction... */
556 do_irg_opt(irg, "lower-mux");
558 do_irg_opt(irg, "bool");
559 do_irg_opt(irg, "shape-blocks");
560 do_irg_opt(irg, "lower-switch");
561 do_irg_opt(irg, "ivopts");
562 do_irg_opt(irg, "local");
563 do_irg_opt(irg, "dead");
566 do_irp_opt("inline");
567 do_irp_opt("opt-proc-clone");
569 for (i = 0; i < get_irp_n_irgs(); i++) {
570 ir_graph *irg = get_irp_irg(i);
571 do_irg_opt(irg, "local");
572 do_irg_opt(irg, "control-flow");
573 do_irg_opt(irg, "thread-jumps");
574 do_irg_opt(irg, "local");
575 do_irg_opt(irg, "control-flow");
578 if (firm_dump.ir_graph) {
579 /* recompute backedges for nicer dumps */
580 for (i = 0; i < get_irp_n_irgs(); i++)
581 construct_cf_backedges(get_irp_irg(i));
584 do_irp_opt("remove-unused");
588 if (firm_dump.statistic & STAT_AFTER_OPT)
589 stat_dump_snapshot(input_filename, "opt");
591 timer_stop(t_all_opt);
597 * @param input_filename the name of the (main) source file
599 static void do_firm_lowering(const char *input_filename)
603 do_irp_opt("lower-dw");
605 if (firm_dump.statistic & STAT_AFTER_LOWER)
606 stat_dump_snapshot(input_filename, "low");
610 if (firm_opt.enabled) {
611 timer_start(t_all_opt);
613 /* run reassociation first on all graphs BEFORE the architecture
614 dependent optimizations are enabled */
615 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
616 ir_graph *irg = get_irp_irg(i);
617 do_irg_opt(irg, "reassociation");
620 /* enable architecture dependent optimizations */
621 arch_dep_set_opts((arch_dep_opts_t)
622 ((firm_opt.muls ? arch_dep_mul_to_shift : arch_dep_none) |
623 (firm_opt.divs ? arch_dep_div_by_const : arch_dep_none) |
624 (firm_opt.mods ? arch_dep_mod_by_const : arch_dep_none) ));
626 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
627 ir_graph *irg = get_irp_irg(i);
629 current_ir_graph = irg;
631 do_irg_opt(irg, "local");
632 do_irg_opt(irg, "gcse");
633 do_irg_opt(irg, "opt-load-store");
634 do_irg_opt(irg, "local");
635 do_irg_opt(irg, "control-flow");
637 if (do_irg_opt(irg, "if-conversion")) {
638 do_irg_opt(irg, "local");
639 do_irg_opt(irg, "control-flow");
642 do_irg_opt(irg, "parallelize-mem");
644 timer_stop(t_all_opt);
646 dump_all("-low-opt");
650 mark_private_methods();
652 /* set the phase to low */
653 for (i = get_irp_n_irgs() - 1; i >= 0; --i)
654 set_irg_phase_low(get_irp_irg(i));
656 /* all graphs are lowered, set the irp phase to low */
657 set_irp_phase_state(phase_low);
659 if (firm_dump.statistic & STAT_FINAL) {
660 stat_dump_snapshot(input_filename, "final");
665 * Initialize for the Firm-generating back end.
667 void gen_firm_init(void)
669 firm_parameter_t params;
670 unsigned pattern = 0;
673 for (i = 0; i < n_opts; ++i) {
674 timers[i] = ir_timer_new();
675 timer_register(timers[i], opts[i].description);
677 t_verify = ir_timer_new();
678 timer_register(t_verify, "Firm: verify pass");
679 t_vcg_dump = ir_timer_new();
680 timer_register(t_vcg_dump, "Firm: vcg dumping");
681 t_all_opt = ir_timer_new();
682 timer_register(t_all_opt, "Firm: all optimizations");
684 if (firm_dump.stat_pattern)
685 pattern |= FIRMSTAT_PATTERN_ENABLED;
687 if (firm_dump.stat_dag)
688 pattern |= FIRMSTAT_COUNT_DAG;
690 memset(¶ms, 0, sizeof(params));
691 params.size = sizeof(params);
692 params.enable_statistics = firm_dump.statistic == STAT_NONE ? 0 :
693 FIRMSTAT_ENABLED | FIRMSTAT_COUNT_STRONG_OP | FIRMSTAT_COUNT_CONSTS
695 params.initialize_local_func = uninitialized_local_var;
696 params.cc_mask = 0; /* no regparam, cdecl */
700 if (firm_be_opt.selection == BE_FIRM_BE) {
701 const backend_params *be_params = be_get_backend_param();
703 if (be_params->do_dw_lowering)
704 set_opt_enabled("lower-dw", true);
706 arch_create_intrinsic = be_params->arch_create_intrinsic_fkt;
707 create_intrinsic_ctx = be_params->create_intrinsic_ctx;
709 ad_param = be_params->dep_param;
710 if_conv_info = be_params->if_conv_info;
713 edges_init_dbg(firm_opt.vrfy_edges);
715 /* Sel node cannot produce NULL pointers */
716 set_opt_sel_based_null_check_elim(1);
718 /* dynamic dispatch works currently only if whole world scenarios */
719 set_opt_dyn_meth_dispatch(0);
721 arch_dep_init(arch_factory);
723 /* do not run architecture dependent optimizations in building phase */
724 arch_dep_set_opts(arch_dep_none);
726 do_node_verification((firm_verification_t) firm_opt.vrfy);
727 if (firm_dump.filter)
728 only_dump_method_with_name(new_id_from_str(firm_dump.filter));
730 if (firm_opt.enabled) {
732 set_opt_constant_folding(firm_opt.const_folding);
733 set_opt_algebraic_simplification(firm_opt.const_folding);
734 set_opt_cse(firm_opt.cse);
735 set_opt_global_cse(0);
736 set_opt_unreachable_code(1);
737 set_opt_control_flow(firm_opt.control_flow);
738 set_opt_control_flow_weak_simplification(1);
739 set_opt_control_flow_strong_simplification(1);
744 /* do not dump entity ld names */
749 * Called, after the Firm generation is completed,
750 * do all optimizations and backend call here.
752 * @param out a file handle for the output, may be NULL
753 * @param input_filename the name of the (main) source file
754 * @param c_mode non-zero if "C" was compiled
755 * @param new_firm_const_exists non-zero, if the const attribute was used on functions
757 void gen_firm_finish(FILE *out, const char *input_filename, int c_mode,
758 int new_firm_const_exists)
763 if (firm_opt.enable_statev) {
765 snprintf(buf, sizeof(buf), "%s.ev", input_filename);
766 ir_stat_ev_begin(input_filename, firm_opt.statev_filter);
767 ir_stat_ev_compilation_unit(input_filename);
771 firm_const_exists = new_firm_const_exists;
773 /* the general for dumping option must be set, or the others will not work*/
775 = (a_byte) (firm_dump.ir_graph | firm_dump.all_phases | firm_dump.extbb);
777 dump_keepalive_edges(1);
778 dump_consts_local(1);
779 dump_dominator_information(1);
780 dump_loop_information(0);
782 if (!firm_dump.edge_labels)
783 turn_off_edge_labels();
785 /* FIXME: cloning might ADD new graphs. */
786 irg_dump_no = calloc(get_irp_last_idx(), sizeof(*irg_dump_no));
788 if (firm_dump.all_types) {
791 dump_class_hierarchy(0, "");
792 dump_class_hierarchy(1, "-with-entities");
796 /* finalize all graphs */
797 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
798 ir_graph *irg = get_irp_irg(i);
799 irg_finalize_cons(irg);
803 timer_push(t_verify);
807 /* all graphs are finalized, set the irp phase to high */
808 set_irp_phase_state(phase_high);
810 /* BEWARE: kill unreachable code before doing compound lowering */
811 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
812 ir_graph *irg = get_irp_irg(i);
813 do_irg_opt(irg, "control-flow");
816 /* lower all compound call return values */
817 lower_compound_params();
819 /* lower copyb nodes */
820 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
821 ir_graph *irg = get_irp_irg(i);
822 lower_CopyB(irg, 128, 4);
825 if (firm_dump.statistic & STAT_BEFORE_OPT) {
826 stat_dump_snapshot(input_filename, "noopt");
829 if (firm_opt.enabled)
830 do_firm_optimizations(input_filename);
833 do_firm_lowering(input_filename);
835 /* set the phase to low */
836 for (i = get_irp_n_irgs() - 1; i >= 0; --i)
837 set_irg_phase_low(get_irp_irg(i));
839 if (firm_dump.statistic & STAT_FINAL_IR)
840 stat_dump_snapshot(input_filename, "final-ir");
842 /* run the code generator */
843 if (firm_be_opt.selection != BE_NONE)
844 do_codegen(out, input_filename);
846 if (firm_dump.statistic & STAT_FINAL)
847 stat_dump_snapshot(input_filename, "final");
850 void disable_all_opts(void)
852 for (int i = 0; i < n_opts; ++i) {
853 opt_config_t *config = &opts[i];
854 if (config->flags & OPT_FLAG_ESSENTIAL) {
855 config->flags |= OPT_FLAG_ENABLED;
857 config->flags &= ~OPT_FLAG_ENABLED;
862 int firm_opt_option(const char *opt)
865 if (strncmp(opt, "no-", 3) == 0) {
870 opt_config_t *config = get_opt(opt);
871 if (config == NULL || (config->flags & OPT_FLAG_HIDE_OPTIONS))
874 config->flags &= ~OPT_FLAG_ENABLED;
875 config->flags |= enable ? OPT_FLAG_ENABLED : 0;
879 void firm_opt_option_help(void)
883 for (i = 0; i < n_opts; ++i) {
887 const opt_config_t *config = &opts[i];
888 if (config->flags & OPT_FLAG_HIDE_OPTIONS)
891 snprintf(buf2, sizeof(buf2), "firm: enable %s", config->description);
892 print_option_help(config->name, buf2);
893 snprintf(buf, sizeof(buf), "no-%s", config->name);
894 snprintf(buf2, sizeof(buf2), "firm: disable %s", config->description);
895 print_option_help(buf, buf2);
900 * Do very early initializations
902 void firm_early_init(void)
904 /* arg: need this here for command line options */
907 enable_safe_defaults();