2 * Copyright (C) 1995-2007 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 Provides several statistic functions for the backend.
23 * @author Christian Wuerdig
36 #include "dbginfo_t.h"
37 #include "firmstat_t.h"
47 #ifdef FIRM_STATISTICS
49 typedef struct _be_stat_irg_t {
50 ir_graph *irg; /**< the irg, the statistic is about */
51 pset *phases; /**< node statistics for each phase */
52 struct obstack obst; /**< the obstack containing the information */
53 const arch_env_t *arch_env; /**< the current arch env */
56 typedef struct _be_stat_phase_t {
57 const arch_env_t *arch_env; /**< the current arch env */
58 const char *phase; /**< the name of the phase the statistic is about */
59 unsigned long num_nodes; /**< overall number of reachable nodes in the irg */
60 unsigned long num_data; /**< number of data nodes ((mode_datab && ! Proj && ! Phi) || mode_T) */
61 unsigned long num_proj; /**< number of Projs */
62 unsigned long num_phi; /**< number of Phis */
63 unsigned long num_load; /**< number of Loads */
64 unsigned long num_store; /**< number of Stores */
65 unsigned long num_spill; /**< number of Spills */
66 unsigned long num_reload; /**< number of Reloads */
69 static set *be_stat_data = NULL;
71 static int cmp_stat_phase(const void *a, const void *b) {
72 const be_stat_phase_t *p1 = a;
73 const be_stat_phase_t *p2 = b;
75 return p1->phase != p2->phase;
78 static int cmp_stat_data(const void *a, const void *b, size_t len) {
79 const be_stat_irg_t *p1 = a;
80 const be_stat_irg_t *p2 = b;
82 return p1->irg != p2->irg;
85 static be_stat_irg_t *find_stat_irg_entry(ir_graph *irg) {
86 be_stat_irg_t *entry, key;
92 entry = set_find(be_stat_data, &key, sizeof(key), HASH_PTR(irg));
97 static be_stat_irg_t *get_stat_irg_entry(ir_graph *irg) {
98 be_stat_irg_t *entry, key;
103 entry = find_stat_irg_entry(irg);
107 entry = set_insert(be_stat_data, &key, sizeof(key), HASH_PTR(irg));
113 struct a_pressure_walker {
119 * Collect reg pressure statistics per block and per class.
121 static void stat_reg_pressure_block(ir_node *block, void *data) {
122 struct a_pressure_walker *env = data;
123 be_irg_t *birg = env->birg;
124 ir_graph *irg = be_get_birg_irg(birg);
125 const arch_env_t *aenv = be_get_birg_arch_env(birg);
126 int i, n = arch_isa_get_n_reg_class(aenv->isa);
128 for (i = 0; i < n; i++) {
129 const arch_register_class_t *cls = arch_isa_get_reg_class(aenv->isa, i);
131 pset *live_nodes = pset_new_ptr(64);
134 live_nodes = be_liveness_end_of_block(env->lv, aenv, cls, block, live_nodes);
135 max_live = pset_count(live_nodes);
137 sched_foreach_reverse(block, irn) {
143 live_nodes = be_liveness_transfer(aenv, cls, irn, live_nodes);
144 cnt = pset_count(live_nodes);
145 max_live = cnt < max_live ? max_live : cnt;
148 stat_be_block_regpressure(irg, block, max_live, cls->name);
152 void be_do_stat_reg_pressure(be_irg_t *birg) {
153 ir_graph *irg = be_get_birg_irg(birg);
155 if (stat_is_active()) {
156 struct a_pressure_walker w;
159 w.lv = be_liveness(irg);
160 /* Collect register pressure information for each block */
161 irg_block_walk_graph(irg, stat_reg_pressure_block, NULL, &w);
162 be_liveness_free(w.lv);
167 * Notify statistic module about amount of ready nodes.
169 void be_do_stat_sched_ready(ir_node *block, const ir_nodeset_t *ready_set) {
170 if (stat_is_active()) {
171 stat_be_block_sched_ready(get_irn_irg(block), block, MIN(ir_nodeset_size(ready_set), 5));
176 * Pass information about a perm to the statistic module.
178 void be_do_stat_perm(const char *class_name, int n_regs, ir_node *perm, ir_node *block, int n, int real_size) {
179 if (stat_is_active()) {
180 stat_be_block_stat_perm(class_name, n_regs, perm, block, n, real_size);
185 * Pass information about a cycle or chain in a perm to the statistic module.
187 void be_do_stat_permcycle(const char *class_name, ir_node *perm, ir_node *block, int is_chain, int n_elems, int n_ops) {
188 if (stat_is_active()) {
189 stat_be_block_stat_permcycle(class_name, perm, block, is_chain, n_elems, n_ops);
194 * Updates nodes statistics.
196 static void do_nodes_stat(ir_node *irn, void *env) {
197 be_stat_phase_t *phase = env;
200 arch_irn_class_t irn_class;
205 mode = get_irn_mode(irn);
206 opc = get_irn_opcode(irn);
210 /* check for nodes we want to ignore */
211 if (be_is_Keep(irn) ||
212 be_is_CopyKeep(irn) ||
217 if (is_Proj(irn) && (mode != mode_X)) {
221 else if (is_Phi(irn)) {
225 else if (mode_is_datab(mode) || ((mode == mode_T) && ! is_be_node(irn)) || (is_Proj(irn) && (mode == mode_X)))
230 else if (opc == iro_Store)
233 irn_class = arch_irn_classify(phase->arch_env, irn);
234 if (irn_class & arch_irn_class_spill)
236 else if (irn_class & arch_irn_class_reload)
238 else if (irn_class & arch_irn_class_stackparam)
240 else if (irn_class & arch_irn_class_load)
242 else if (irn_class & arch_irn_class_store)
247 * Collects node statistics.
249 * @param irg the to do statistics for
250 * @param phase the phase to collect the statistic for
252 void be_do_stat_nodes(ir_graph *irg, const char *phase) {
253 be_stat_irg_t *irg_entry;
254 be_stat_phase_t *phase_entry, phase_key;
256 irg_entry = find_stat_irg_entry(irg);
261 phase_key.phase = phase;
262 phase_entry = pset_find_ptr(irg_entry->phases, &phase_key);
265 phase_entry = obstack_alloc(&irg_entry->obst, sizeof(*phase_entry));
266 phase_entry = pset_insert(irg_entry->phases, phase_entry, HASH_PTR(phase));
268 memset(phase_entry, 0, sizeof(*phase_entry));
270 phase_entry->phase = phase;
271 phase_entry->arch_env = irg_entry->arch_env;
273 irg_walk_blkwise_graph(irg_entry->irg, NULL, do_nodes_stat, phase_entry);
277 * Dumps statistics about nodes (called from dump_snapshot)
279 static void be_dump_node_stat(dumper_t *dmp, graph_entry_t *entry) {
280 be_stat_irg_t *stat_irg = find_stat_irg_entry(entry->irg);
281 be_stat_phase_t *phase;
283 if (! stat_irg || ! stat_irg->phases)
286 fprintf(dmp->f, "===> BE NODE STATISTIC BEGIN <===\n");
288 foreach_pset(stat_irg->phases, phase) {
289 fprintf(dmp->f, "--> Phase: %s\n", phase->phase);
290 fprintf(dmp->f, "# nodes: %ld\n", phase->num_nodes);
291 fprintf(dmp->f, "# data nodes: %ld\n", phase->num_data);
292 fprintf(dmp->f, "# Proj: %ld\n", phase->num_proj);
293 fprintf(dmp->f, "# Phi: %ld\n", phase->num_phi);
294 fprintf(dmp->f, "# Load: %ld\n", phase->num_load);
295 fprintf(dmp->f, "# Store: %ld\n", phase->num_store);
296 fprintf(dmp->f, "# Spill: %ld\n", phase->num_spill);
297 fprintf(dmp->f, "# Reload: %ld\n", phase->num_reload);
300 fprintf(dmp->f, "===> BE NODE STATISTIC END <===\n");
304 * Returns a be statistic object for the given irg.
306 void be_stat_init_irg(const arch_env_t *arch_env, ir_graph *irg) {
307 static int reg_func = 1;
309 if (stat_is_active()) {
310 be_stat_irg_t *stat_irg;
313 be_stat_data = new_set(cmp_stat_data, 8);
315 stat_irg = get_stat_irg_entry(irg);
317 stat_irg->phases = new_pset(cmp_stat_phase, 8);
318 stat_irg->arch_env = arch_env;
319 obstack_init(&stat_irg->obst);
322 /* first init: register dumper */
323 stat_register_dumper_func(be_dump_node_stat);
328 #endif /* FIRM_STATISTICS */
330 typedef struct _estimate_irg_costs_env_t {
331 const arch_env_t *arch_env;
332 ir_exec_freq *execfreqs;
334 } estimate_irg_costs_env_t;
336 static void estimate_block_costs(ir_node *block, void *data)
338 estimate_irg_costs_env_t *env = data;
342 sched_foreach(block, node) {
343 costs += arch_get_op_estimated_cost(env->arch_env, node);
346 env->costs += costs * get_block_execfreq(env->execfreqs, block);
349 double be_estimate_irg_costs(ir_graph *irg, const arch_env_t *arch_env, ir_exec_freq *execfreqs)
351 estimate_irg_costs_env_t env;
353 env.arch_env = arch_env;
354 env.execfreqs = execfreqs;
357 irg_block_walk_graph(irg, estimate_block_costs, NULL, &env);
362 #ifdef FIRM_STATISTICS
364 const char *be_stat_tags[STAT_TAG_LAST];
365 FILE *be_stat_file = NULL;
367 void be_init_stat_file(const char *stat_file_name, const char *sourcefilename)
369 static char time_str[32];
371 assert(be_stat_file == NULL);
373 /* if we want to do some statistics, push the environment. */
374 if (strlen(stat_file_name) == 0)
377 be_stat_file = fopen(stat_file_name, "at");
378 if (be_stat_file == NULL) {
379 fprintf(stderr, "Warning couldn't open statfile '%s'\n", stat_file_name);
383 /* initialize the statistics tags */
384 ir_snprintf(time_str, sizeof(time_str),"%u", time(NULL));
386 be_stat_tags[STAT_TAG_FILE] = sourcefilename;
387 be_stat_tags[STAT_TAG_TIME] = time_str;
388 be_stat_tags[STAT_TAG_IRG] = "<all>";
389 be_stat_tags[STAT_TAG_CLS] = "<all>";
391 be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
394 void be_close_stat_file()
397 if (be_stat_file != NULL) {
398 fclose(be_stat_file);
403 #else /* FIRM_STATISTICS */
405 void (be_stat_init_irg)(const arch_env_t *arch_env, ir_graph *irg) {}
406 void (be_do_stat_nodes)(ir_graph *irg, const char *phase) {}
407 void (be_do_stat_reg_pressure)(be_irg_t *birg) {}
408 void (be_do_stat_sched_ready)(ir_node *block, nodeset *ready_set) {}
409 void (be_do_stat_perm)(const char *class_name, int n_regs, ir_node *perm, ir_node *block, int n, int real_size) {}
411 #endif /* FIRM_STATISTICS */