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
37 #include "dbginfo_t.h"
38 #include "firmstat_t.h"
48 #ifdef FIRM_STATISTICS
50 typedef struct _be_stat_irg_t {
51 ir_graph *irg; /**< the irg, the statistic is about */
52 pset *phases; /**< node statistics for each phase */
53 struct obstack obst; /**< the obstack containing the information */
54 const arch_env_t *arch_env; /**< the current arch env */
57 typedef struct _be_stat_phase_t {
58 const arch_env_t *arch_env; /**< the current arch env */
59 const char *phase; /**< the name of the phase the statistic is about */
60 unsigned long num_nodes; /**< overall number of reachable nodes in the irg */
61 unsigned long num_data; /**< number of data nodes ((mode_datab && ! Proj && ! Phi) || mode_T) */
62 unsigned long num_proj; /**< number of Projs */
63 unsigned long num_phi; /**< number of Phis */
64 unsigned long num_load; /**< number of Loads */
65 unsigned long num_store; /**< number of Stores */
66 unsigned long num_spill; /**< number of Spills */
67 unsigned long num_reload; /**< number of Reloads */
70 static set *be_stat_data = NULL;
72 static int cmp_stat_phase(const void *a, const void *b) {
73 const be_stat_phase_t *p1 = a;
74 const be_stat_phase_t *p2 = b;
76 return p1->phase != p2->phase;
79 static int cmp_stat_data(const void *a, const void *b, size_t len) {
80 const be_stat_irg_t *p1 = a;
81 const be_stat_irg_t *p2 = b;
84 return p1->irg != p2->irg;
87 static be_stat_irg_t *find_stat_irg_entry(ir_graph *irg) {
88 be_stat_irg_t *entry, key;
94 entry = set_find(be_stat_data, &key, sizeof(key), HASH_PTR(irg));
99 static be_stat_irg_t *get_stat_irg_entry(ir_graph *irg) {
100 be_stat_irg_t *entry, key;
105 entry = find_stat_irg_entry(irg);
109 entry = set_insert(be_stat_data, &key, sizeof(key), HASH_PTR(irg));
115 struct a_pressure_walker {
121 * Collect reg pressure statistics per block and per class.
123 static void stat_reg_pressure_block(ir_node *block, void *data) {
124 struct a_pressure_walker *env = data;
125 be_irg_t *birg = env->birg;
126 ir_graph *irg = be_get_birg_irg(birg);
127 const arch_env_t *aenv = be_get_birg_arch_env(birg);
128 int i, n = arch_isa_get_n_reg_class(aenv->isa);
130 for (i = 0; i < n; i++) {
131 const arch_register_class_t *cls = arch_isa_get_reg_class(aenv->isa, i);
133 pset *live_nodes = pset_new_ptr(64);
136 live_nodes = be_liveness_end_of_block(env->lv, aenv, cls, block, live_nodes);
137 max_live = pset_count(live_nodes);
139 sched_foreach_reverse(block, irn) {
145 live_nodes = be_liveness_transfer(aenv, cls, irn, live_nodes);
146 cnt = pset_count(live_nodes);
147 max_live = cnt < max_live ? max_live : cnt;
150 stat_be_block_regpressure(irg, block, max_live, cls->name);
154 void be_do_stat_reg_pressure(be_irg_t *birg) {
155 ir_graph *irg = be_get_birg_irg(birg);
157 if (stat_is_active()) {
158 struct a_pressure_walker w;
161 w.lv = be_liveness(irg);
162 /* Collect register pressure information for each block */
163 irg_block_walk_graph(irg, stat_reg_pressure_block, NULL, &w);
164 be_liveness_free(w.lv);
169 * Notify statistic module about amount of ready nodes.
171 void be_do_stat_sched_ready(ir_node *block, const ir_nodeset_t *ready_set) {
172 if (stat_is_active()) {
173 stat_be_block_sched_ready(get_irn_irg(block), block, MIN(ir_nodeset_size(ready_set), 5));
178 * Pass information about a perm to the statistic module.
180 void be_do_stat_perm(const char *class_name, int n_regs, ir_node *perm, ir_node *block, int n, int real_size) {
181 if (stat_is_active()) {
182 stat_be_block_stat_perm(class_name, n_regs, perm, block, n, real_size);
187 * Pass information about a cycle or chain in a perm to the statistic module.
189 void be_do_stat_permcycle(const char *class_name, ir_node *perm, ir_node *block, int is_chain, int n_elems, int n_ops) {
190 if (stat_is_active()) {
191 stat_be_block_stat_permcycle(class_name, perm, block, is_chain, n_elems, n_ops);
196 * Updates nodes statistics.
198 static void do_nodes_stat(ir_node *irn, void *env) {
199 be_stat_phase_t *phase = env;
202 arch_irn_class_t irn_class;
207 mode = get_irn_mode(irn);
208 opc = get_irn_opcode(irn);
212 /* check for nodes we want to ignore */
213 if (be_is_Keep(irn) ||
214 be_is_CopyKeep(irn) ||
219 if (is_Proj(irn) && (mode != mode_X)) {
223 else if (is_Phi(irn)) {
227 else if (mode_is_datab(mode) || ((mode == mode_T) && ! is_be_node(irn)) || (is_Proj(irn) && (mode == mode_X)))
232 else if (opc == iro_Store)
235 irn_class = arch_irn_classify(phase->arch_env, irn);
236 if (irn_class & arch_irn_class_spill)
238 else if (irn_class & arch_irn_class_reload)
240 else if (irn_class & arch_irn_class_stackparam)
242 else if (irn_class & arch_irn_class_load)
244 else if (irn_class & arch_irn_class_store)
249 * Collects node statistics.
251 * @param irg the to do statistics for
252 * @param phase the phase to collect the statistic for
254 void be_do_stat_nodes(ir_graph *irg, const char *phase) {
255 be_stat_irg_t *irg_entry;
256 be_stat_phase_t *phase_entry, phase_key;
258 irg_entry = find_stat_irg_entry(irg);
263 phase_key.phase = phase;
264 phase_entry = pset_find_ptr(irg_entry->phases, &phase_key);
267 phase_entry = obstack_alloc(&irg_entry->obst, sizeof(*phase_entry));
268 phase_entry = pset_insert(irg_entry->phases, phase_entry, HASH_PTR(phase));
270 memset(phase_entry, 0, sizeof(*phase_entry));
272 phase_entry->phase = phase;
273 phase_entry->arch_env = irg_entry->arch_env;
275 irg_walk_blkwise_graph(irg_entry->irg, NULL, do_nodes_stat, phase_entry);
279 * Dumps statistics about nodes (called from dump_snapshot)
281 static void be_dump_node_stat(dumper_t *dmp, graph_entry_t *entry) {
282 be_stat_irg_t *stat_irg = find_stat_irg_entry(entry->irg);
283 be_stat_phase_t *phase;
285 if (! stat_irg || ! stat_irg->phases)
288 fprintf(dmp->f, "===> BE NODE STATISTIC BEGIN <===\n");
290 foreach_pset(stat_irg->phases, phase) {
291 fprintf(dmp->f, "--> Phase: %s\n", phase->phase);
292 fprintf(dmp->f, "# nodes: %ld\n", phase->num_nodes);
293 fprintf(dmp->f, "# data nodes: %ld\n", phase->num_data);
294 fprintf(dmp->f, "# Proj: %ld\n", phase->num_proj);
295 fprintf(dmp->f, "# Phi: %ld\n", phase->num_phi);
296 fprintf(dmp->f, "# Load: %ld\n", phase->num_load);
297 fprintf(dmp->f, "# Store: %ld\n", phase->num_store);
298 fprintf(dmp->f, "# Spill: %ld\n", phase->num_spill);
299 fprintf(dmp->f, "# Reload: %ld\n", phase->num_reload);
302 fprintf(dmp->f, "===> BE NODE STATISTIC END <===\n");
306 * Returns a be statistic object for the given irg.
308 void be_stat_init_irg(const arch_env_t *arch_env, ir_graph *irg) {
309 static int reg_func = 1;
311 if (stat_is_active()) {
312 be_stat_irg_t *stat_irg;
315 be_stat_data = new_set(cmp_stat_data, 8);
317 stat_irg = get_stat_irg_entry(irg);
319 stat_irg->phases = new_pset(cmp_stat_phase, 8);
320 stat_irg->arch_env = arch_env;
321 obstack_init(&stat_irg->obst);
324 /* first init: register dumper */
325 stat_register_dumper_func(be_dump_node_stat);
330 #endif /* FIRM_STATISTICS */
332 typedef struct _estimate_irg_costs_env_t {
333 const arch_env_t *arch_env;
334 ir_exec_freq *execfreqs;
336 } estimate_irg_costs_env_t;
338 static void estimate_block_costs(ir_node *block, void *data)
340 estimate_irg_costs_env_t *env = data;
344 sched_foreach(block, node) {
345 costs += arch_get_op_estimated_cost(env->arch_env, node);
348 env->costs += costs * get_block_execfreq(env->execfreqs, block);
351 double be_estimate_irg_costs(ir_graph *irg, const arch_env_t *arch_env, ir_exec_freq *execfreqs)
353 estimate_irg_costs_env_t env;
355 env.arch_env = arch_env;
356 env.execfreqs = execfreqs;
359 irg_block_walk_graph(irg, estimate_block_costs, NULL, &env);
364 #ifdef FIRM_STATISTICS
366 const char *be_stat_tags[STAT_TAG_LAST];
367 FILE *be_stat_file = NULL;
369 void be_init_stat_file(const char *stat_file_name, const char *sourcefilename)
371 static char time_str[32];
373 assert(be_stat_file == NULL);
375 /* if we want to do some statistics, push the environment. */
376 if (strlen(stat_file_name) == 0)
379 be_stat_file = fopen(stat_file_name, "at");
380 if (be_stat_file == NULL) {
381 fprintf(stderr, "Warning couldn't open statfile '%s'\n", stat_file_name);
385 /* initialize the statistics tags */
386 ir_snprintf(time_str, sizeof(time_str),"%u", time(NULL));
388 be_stat_tags[STAT_TAG_FILE] = sourcefilename;
389 be_stat_tags[STAT_TAG_TIME] = time_str;
390 be_stat_tags[STAT_TAG_IRG] = "<all>";
391 be_stat_tags[STAT_TAG_CLS] = "<all>";
393 be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
396 void be_close_stat_file()
399 if (be_stat_file != NULL) {
400 fclose(be_stat_file);
405 #else /* FIRM_STATISTICS */
407 void (be_stat_init_irg)(const arch_env_t *arch_env, ir_graph *irg) {}
408 void (be_do_stat_nodes)(ir_graph *irg, const char *phase) {}
409 void (be_do_stat_reg_pressure)(be_irg_t *birg) {}
410 void (be_do_stat_sched_ready)(ir_node *block, ir_nodeset_t *ready_set) {}
411 void (be_do_stat_perm)(const char *class_name, int n_regs, ir_node *perm, ir_node *block, int n, int real_size) {}
413 #endif /* FIRM_STATISTICS */