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"
49 #ifdef FIRM_STATISTICS
51 typedef struct _be_stat_irg_t {
52 ir_graph *irg; /**< the irg, the statistic is about */
53 pset *phases; /**< node statistics for each phase */
54 struct obstack obst; /**< the obstack containing the information */
55 const arch_env_t *arch_env; /**< the current arch env */
58 typedef struct _be_stat_phase_t {
59 const arch_env_t *arch_env; /**< the current arch env */
60 const char *phase; /**< the name of the phase the statistic is about */
61 unsigned long num_nodes; /**< overall number of reachable nodes in the irg */
62 unsigned long num_data; /**< number of data nodes ((mode_datab && ! Proj && ! Phi) || mode_T) */
63 unsigned long num_proj; /**< number of Projs */
64 unsigned long num_phi; /**< number of Phis */
65 unsigned long num_load; /**< number of Loads */
66 unsigned long num_store; /**< number of Stores */
67 unsigned long num_spill; /**< number of Spills */
68 unsigned long num_reload; /**< number of Reloads */
71 static set *be_stat_data = NULL;
73 static int cmp_stat_phase(const void *a, const void *b) {
74 const be_stat_phase_t *p1 = a;
75 const be_stat_phase_t *p2 = b;
77 return p1->phase != p2->phase;
80 static int cmp_stat_data(const void *a, const void *b, size_t len) {
81 const be_stat_irg_t *p1 = a;
82 const be_stat_irg_t *p2 = b;
85 return p1->irg != p2->irg;
88 static be_stat_irg_t *find_stat_irg_entry(ir_graph *irg) {
89 be_stat_irg_t *entry, key;
95 entry = set_find(be_stat_data, &key, sizeof(key), HASH_PTR(irg));
100 static be_stat_irg_t *get_stat_irg_entry(ir_graph *irg) {
101 be_stat_irg_t *entry, key;
106 entry = find_stat_irg_entry(irg);
110 entry = set_insert(be_stat_data, &key, sizeof(key), HASH_PTR(irg));
116 struct a_pressure_walker {
122 * Collect reg pressure statistics per block and per class.
124 static void stat_reg_pressure_block(ir_node *block, void *data) {
125 struct a_pressure_walker *env = data;
126 be_irg_t *birg = env->birg;
127 ir_graph *irg = be_get_birg_irg(birg);
128 const arch_env_t *aenv = be_get_birg_arch_env(birg);
129 int i, n = arch_isa_get_n_reg_class(aenv->isa);
131 for (i = 0; i < n; i++) {
132 const arch_register_class_t *cls = arch_isa_get_reg_class(aenv->isa, i);
134 pset *live_nodes = pset_new_ptr(64);
137 live_nodes = be_liveness_end_of_block(env->lv, aenv, cls, block, live_nodes);
138 max_live = pset_count(live_nodes);
140 sched_foreach_reverse(block, irn) {
146 live_nodes = be_liveness_transfer(aenv, cls, irn, live_nodes);
147 cnt = pset_count(live_nodes);
148 max_live = cnt < max_live ? max_live : cnt;
151 stat_be_block_regpressure(irg, block, max_live, cls->name);
155 void be_do_stat_reg_pressure(be_irg_t *birg) {
156 ir_graph *irg = be_get_birg_irg(birg);
158 if (stat_is_active()) {
159 struct a_pressure_walker w;
162 w.lv = be_liveness(irg);
163 /* Collect register pressure information for each block */
164 irg_block_walk_graph(irg, stat_reg_pressure_block, NULL, &w);
165 be_liveness_free(w.lv);
170 * Notify statistic module about amount of ready nodes.
172 void be_do_stat_sched_ready(ir_node *block, const ir_nodeset_t *ready_set) {
173 if (stat_is_active()) {
174 stat_be_block_sched_ready(get_irn_irg(block), block, MIN(ir_nodeset_size(ready_set), 5));
179 * Pass information about a perm to the statistic module.
181 void be_do_stat_perm(const char *class_name, int n_regs, ir_node *perm, ir_node *block, int n, int real_size) {
182 if (stat_is_active()) {
183 stat_be_block_stat_perm(class_name, n_regs, perm, block, n, real_size);
188 * Pass information about a cycle or chain in a perm to the statistic module.
190 void be_do_stat_permcycle(const char *class_name, ir_node *perm, ir_node *block, int is_chain, int n_elems, int n_ops) {
191 if (stat_is_active()) {
192 stat_be_block_stat_permcycle(class_name, perm, block, is_chain, n_elems, n_ops);
197 * Updates nodes statistics.
199 static void do_nodes_stat(ir_node *irn, void *env) {
200 be_stat_phase_t *phase = env;
203 arch_irn_class_t irn_class;
208 mode = get_irn_mode(irn);
209 opc = get_irn_opcode(irn);
213 /* check for nodes we want to ignore */
214 if (be_is_Keep(irn) ||
215 be_is_CopyKeep(irn) ||
220 if (is_Proj(irn) && (mode != mode_X)) {
224 else if (is_Phi(irn)) {
228 else if (mode_is_datab(mode) || ((mode == mode_T) && ! is_be_node(irn)) || (is_Proj(irn) && (mode == mode_X)))
233 else if (opc == iro_Store)
236 irn_class = arch_irn_classify(phase->arch_env, irn);
237 if (irn_class & arch_irn_class_spill)
239 else if (irn_class & arch_irn_class_reload)
241 else if (irn_class & arch_irn_class_stackparam)
243 else if (irn_class & arch_irn_class_load)
245 else if (irn_class & arch_irn_class_store)
250 * Collects node statistics.
252 * @param irg the to do statistics for
253 * @param phase the phase to collect the statistic for
255 void be_do_stat_nodes(ir_graph *irg, const char *phase) {
256 be_stat_irg_t *irg_entry;
257 be_stat_phase_t *phase_entry, phase_key;
259 irg_entry = find_stat_irg_entry(irg);
264 phase_key.phase = phase;
265 phase_entry = pset_find_ptr(irg_entry->phases, &phase_key);
268 phase_entry = obstack_alloc(&irg_entry->obst, sizeof(*phase_entry));
269 phase_entry = pset_insert(irg_entry->phases, phase_entry, HASH_PTR(phase));
271 memset(phase_entry, 0, sizeof(*phase_entry));
273 phase_entry->phase = phase;
274 phase_entry->arch_env = irg_entry->arch_env;
276 irg_walk_blkwise_graph(irg_entry->irg, NULL, do_nodes_stat, phase_entry);
280 * Dumps statistics about nodes (called from dump_snapshot)
282 static void be_dump_node_stat(dumper_t *dmp, graph_entry_t *entry) {
283 be_stat_irg_t *stat_irg = find_stat_irg_entry(entry->irg);
284 be_stat_phase_t *phase;
286 if (! stat_irg || ! stat_irg->phases)
289 fprintf(dmp->f, "===> BE NODE STATISTIC BEGIN <===\n");
291 foreach_pset(stat_irg->phases, phase) {
292 fprintf(dmp->f, "--> Phase: %s\n", phase->phase);
293 fprintf(dmp->f, "# nodes: %ld\n", phase->num_nodes);
294 fprintf(dmp->f, "# data nodes: %ld\n", phase->num_data);
295 fprintf(dmp->f, "# Proj: %ld\n", phase->num_proj);
296 fprintf(dmp->f, "# Phi: %ld\n", phase->num_phi);
297 fprintf(dmp->f, "# Load: %ld\n", phase->num_load);
298 fprintf(dmp->f, "# Store: %ld\n", phase->num_store);
299 fprintf(dmp->f, "# Spill: %ld\n", phase->num_spill);
300 fprintf(dmp->f, "# Reload: %ld\n", phase->num_reload);
303 fprintf(dmp->f, "===> BE NODE STATISTIC END <===\n");
307 * Returns a be statistic object for the given irg.
309 void be_stat_init_irg(const arch_env_t *arch_env, ir_graph *irg) {
310 static int reg_func = 1;
312 if (stat_is_active()) {
313 be_stat_irg_t *stat_irg;
316 be_stat_data = new_set(cmp_stat_data, 8);
318 stat_irg = get_stat_irg_entry(irg);
320 stat_irg->phases = new_pset(cmp_stat_phase, 8);
321 stat_irg->arch_env = arch_env;
322 obstack_init(&stat_irg->obst);
325 /* first init: register dumper */
326 stat_register_dumper_func(be_dump_node_stat);
331 #endif /* FIRM_STATISTICS */
333 typedef struct _estimate_irg_costs_env_t {
334 const arch_env_t *arch_env;
335 ir_exec_freq *execfreqs;
337 } estimate_irg_costs_env_t;
339 static void estimate_block_costs(ir_node *block, void *data)
341 estimate_irg_costs_env_t *env = data;
345 sched_foreach(block, node) {
346 costs += arch_get_op_estimated_cost(env->arch_env, node);
349 env->costs += costs * get_block_execfreq(env->execfreqs, block);
352 double be_estimate_irg_costs(ir_graph *irg, const arch_env_t *arch_env, ir_exec_freq *execfreqs)
354 estimate_irg_costs_env_t env;
356 env.arch_env = arch_env;
357 env.execfreqs = execfreqs;
360 irg_block_walk_graph(irg, estimate_block_costs, NULL, &env);
365 #ifdef FIRM_STATISTICS
368 #else /* FIRM_STATISTICS */
370 void (be_stat_init_irg)(const arch_env_t *arch_env, ir_graph *irg) {}
371 void (be_do_stat_nodes)(ir_graph *irg, const char *phase) {}
372 void (be_do_stat_reg_pressure)(be_irg_t *birg) {}
373 void (be_do_stat_sched_ready)(ir_node *block, ir_nodeset_t *ready_set) {}
374 void (be_do_stat_perm)(const char *class_name, int n_regs, ir_node *perm, ir_node *block, int n, int real_size) {}
376 #endif /* FIRM_STATISTICS */