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1 | /* Optimization statistics functions. | |
2 | Copyright (C) 2008-2019 Free Software Foundation, Inc. | |
3 | Contributed by Richard Guenther <rguenther@suse.de> | |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include "function.h" | |
25 | #include "tree-pass.h" | |
26 | #include "context.h" | |
27 | #include "pass_manager.h" | |
28 | ||
29 | static int statistics_dump_nr; | |
30 | static dump_flags_t statistics_dump_flags; | |
31 | static FILE *statistics_dump_file; | |
32 | ||
33 | /* Statistics entry. A integer counter associated to a string ID | |
34 | and value. */ | |
35 | ||
36 | struct statistics_counter { | |
37 | const char *id; | |
38 | int val; | |
39 | bool histogram_p; | |
40 | unsigned HOST_WIDE_INT count; | |
41 | unsigned HOST_WIDE_INT prev_dumped_count; | |
42 | }; | |
43 | ||
44 | /* Hashtable helpers. */ | |
45 | ||
46 | struct stats_counter_hasher : pointer_hash <statistics_counter> | |
47 | { | |
48 | static inline hashval_t hash (const statistics_counter *); | |
49 | static inline bool equal (const statistics_counter *, | |
50 | const statistics_counter *); | |
51 | static inline void remove (statistics_counter *); | |
52 | }; | |
53 | ||
54 | /* Hash a statistic counter by its string ID. */ | |
55 | ||
56 | inline hashval_t | |
57 | stats_counter_hasher::hash (const statistics_counter *c) | |
58 | { | |
59 | return htab_hash_string (c->id) + c->val; | |
60 | } | |
61 | ||
62 | /* Compare two statistic counters by their string IDs. */ | |
63 | ||
64 | inline bool | |
65 | stats_counter_hasher::equal (const statistics_counter *c1, | |
66 | const statistics_counter *c2) | |
67 | { | |
68 | return c1->val == c2->val && strcmp (c1->id, c2->id) == 0; | |
69 | } | |
70 | ||
71 | /* Free a statistics entry. */ | |
72 | ||
73 | inline void | |
74 | stats_counter_hasher::remove (statistics_counter *v) | |
75 | { | |
76 | free (CONST_CAST (char *, v->id)); | |
77 | free (v); | |
78 | } | |
79 | ||
80 | typedef hash_table<stats_counter_hasher> stats_counter_table_type; | |
81 | ||
82 | /* Array of statistic hashes, indexed by pass id. */ | |
83 | static stats_counter_table_type **statistics_hashes; | |
84 | static unsigned nr_statistics_hashes; | |
85 | ||
86 | /* Return the current hashtable to be used for recording or printing | |
87 | statistics. */ | |
88 | ||
89 | static stats_counter_table_type * | |
90 | curr_statistics_hash (void) | |
91 | { | |
92 | unsigned idx; | |
93 | ||
94 | gcc_assert (current_pass->static_pass_number >= 0); | |
95 | idx = current_pass->static_pass_number; | |
96 | ||
97 | if (idx < nr_statistics_hashes | |
98 | && statistics_hashes[idx]) | |
99 | return statistics_hashes[idx]; | |
100 | ||
101 | if (idx >= nr_statistics_hashes) | |
102 | { | |
103 | statistics_hashes = XRESIZEVEC (stats_counter_table_type *, | |
104 | statistics_hashes, idx+1); | |
105 | memset (statistics_hashes + nr_statistics_hashes, 0, | |
106 | (idx + 1 - nr_statistics_hashes) | |
107 | * sizeof (stats_counter_table_type *)); | |
108 | nr_statistics_hashes = idx + 1; | |
109 | } | |
110 | ||
111 | statistics_hashes[idx] = new stats_counter_table_type (15); | |
112 | ||
113 | return statistics_hashes[idx]; | |
114 | } | |
115 | ||
116 | /* Helper for statistics_fini_pass. Print the counter difference | |
117 | since the last dump for the pass dump files. */ | |
118 | ||
119 | int | |
120 | statistics_fini_pass_1 (statistics_counter **slot, | |
121 | void *data ATTRIBUTE_UNUSED) | |
122 | { | |
123 | statistics_counter *counter = *slot; | |
124 | unsigned HOST_WIDE_INT count = counter->count - counter->prev_dumped_count; | |
125 | if (count == 0) | |
126 | return 1; | |
127 | if (counter->histogram_p) | |
128 | fprintf (dump_file, "%s == %d: " HOST_WIDE_INT_PRINT_DEC "\n", | |
129 | counter->id, counter->val, count); | |
130 | else | |
131 | fprintf (dump_file, "%s: " HOST_WIDE_INT_PRINT_DEC "\n", | |
132 | counter->id, count); | |
133 | counter->prev_dumped_count = counter->count; | |
134 | return 1; | |
135 | } | |
136 | ||
137 | /* Helper for statistics_fini_pass. Print the counter difference | |
138 | since the last dump for the statistics dump. */ | |
139 | ||
140 | int | |
141 | statistics_fini_pass_2 (statistics_counter **slot, | |
142 | void *data ATTRIBUTE_UNUSED) | |
143 | { | |
144 | statistics_counter *counter = *slot; | |
145 | unsigned HOST_WIDE_INT count = counter->count - counter->prev_dumped_count; | |
146 | if (count == 0) | |
147 | return 1; | |
148 | counter->prev_dumped_count = counter->count; | |
149 | if (counter->histogram_p) | |
150 | fprintf (statistics_dump_file, | |
151 | "%d %s \"%s == %d\" \"%s\" " HOST_WIDE_INT_PRINT_DEC "\n", | |
152 | current_pass->static_pass_number, | |
153 | current_pass->name, | |
154 | counter->id, counter->val, | |
155 | current_function_name (), | |
156 | count); | |
157 | else | |
158 | fprintf (statistics_dump_file, | |
159 | "%d %s \"%s\" \"%s\" " HOST_WIDE_INT_PRINT_DEC "\n", | |
160 | current_pass->static_pass_number, | |
161 | current_pass->name, | |
162 | counter->id, | |
163 | current_function_name (), | |
164 | count); | |
165 | counter->prev_dumped_count = counter->count; | |
166 | return 1; | |
167 | } | |
168 | ||
169 | /* Helper for statistics_fini_pass, reset the counters. */ | |
170 | ||
171 | int | |
172 | statistics_fini_pass_3 (statistics_counter **slot, | |
173 | void *data ATTRIBUTE_UNUSED) | |
174 | { | |
175 | statistics_counter *counter = *slot; | |
176 | counter->prev_dumped_count = counter->count; | |
177 | return 1; | |
178 | } | |
179 | ||
180 | /* Dump the current statistics incrementally. */ | |
181 | ||
182 | void | |
183 | statistics_fini_pass (void) | |
184 | { | |
185 | if (current_pass->static_pass_number == -1) | |
186 | return; | |
187 | ||
188 | if (dump_file | |
189 | && dump_flags & TDF_STATS) | |
190 | { | |
191 | fprintf (dump_file, "\n"); | |
192 | fprintf (dump_file, "Pass statistics of \"%s\": ", current_pass->name); | |
193 | fprintf (dump_file, "----------------\n"); | |
194 | curr_statistics_hash () | |
195 | ->traverse_noresize <void *, statistics_fini_pass_1> (NULL); | |
196 | fprintf (dump_file, "\n"); | |
197 | } | |
198 | if (statistics_dump_file | |
199 | && !(statistics_dump_flags & TDF_STATS | |
200 | || statistics_dump_flags & TDF_DETAILS)) | |
201 | curr_statistics_hash () | |
202 | ->traverse_noresize <void *, statistics_fini_pass_2> (NULL); | |
203 | curr_statistics_hash () | |
204 | ->traverse_noresize <void *, statistics_fini_pass_3> (NULL); | |
205 | } | |
206 | ||
207 | /* Helper for printing summary information. */ | |
208 | ||
209 | int | |
210 | statistics_fini_1 (statistics_counter **slot, opt_pass *pass) | |
211 | { | |
212 | statistics_counter *counter = *slot; | |
213 | if (counter->count == 0) | |
214 | return 1; | |
215 | if (counter->histogram_p) | |
216 | fprintf (statistics_dump_file, | |
217 | "%d %s \"%s == %d\" " HOST_WIDE_INT_PRINT_DEC "\n", | |
218 | pass->static_pass_number, | |
219 | pass->name, | |
220 | counter->id, counter->val, | |
221 | counter->count); | |
222 | else | |
223 | fprintf (statistics_dump_file, | |
224 | "%d %s \"%s\" " HOST_WIDE_INT_PRINT_DEC "\n", | |
225 | pass->static_pass_number, | |
226 | pass->name, | |
227 | counter->id, | |
228 | counter->count); | |
229 | return 1; | |
230 | } | |
231 | ||
232 | /* Finish the statistics and dump summary information. */ | |
233 | ||
234 | void | |
235 | statistics_fini (void) | |
236 | { | |
237 | gcc::pass_manager *passes = g->get_passes (); | |
238 | if (!statistics_dump_file) | |
239 | return; | |
240 | ||
241 | if (statistics_dump_flags & TDF_STATS) | |
242 | { | |
243 | unsigned i; | |
244 | for (i = 0; i < nr_statistics_hashes; ++i) | |
245 | if (statistics_hashes[i] | |
246 | && passes->get_pass_for_id (i) != NULL) | |
247 | statistics_hashes[i] | |
248 | ->traverse_noresize <opt_pass *, statistics_fini_1> | |
249 | (passes->get_pass_for_id (i)); | |
250 | } | |
251 | ||
252 | dump_end (statistics_dump_nr, statistics_dump_file); | |
253 | } | |
254 | ||
255 | /* Register the statistics dump file. */ | |
256 | ||
257 | void | |
258 | statistics_early_init (void) | |
259 | { | |
260 | gcc::dump_manager *dumps = g->get_dumps (); | |
261 | statistics_dump_nr = dumps->dump_register (".statistics", "statistics", | |
262 | "statistics", DK_tree, | |
263 | OPTGROUP_NONE, | |
264 | false); | |
265 | } | |
266 | ||
267 | /* Init the statistics. */ | |
268 | ||
269 | void | |
270 | statistics_init (void) | |
271 | { | |
272 | gcc::dump_manager *dumps = g->get_dumps (); | |
273 | statistics_dump_file = dump_begin (statistics_dump_nr, NULL); | |
274 | statistics_dump_flags = dumps->get_dump_file_info (statistics_dump_nr)->pflags; | |
275 | } | |
276 | ||
277 | /* Lookup or add a statistics counter in the hashtable HASH with ID, VAL | |
278 | and HISTOGRAM_P. */ | |
279 | ||
280 | static statistics_counter * | |
281 | lookup_or_add_counter (stats_counter_table_type *hash, const char *id, int val, | |
282 | bool histogram_p) | |
283 | { | |
284 | statistics_counter **counter; | |
285 | statistics_counter c; | |
286 | c.id = id; | |
287 | c.val = val; | |
288 | counter = hash->find_slot (&c, INSERT); | |
289 | if (!*counter) | |
290 | { | |
291 | *counter = XNEW (statistics_counter); | |
292 | (*counter)->id = xstrdup (id); | |
293 | (*counter)->val = val; | |
294 | (*counter)->histogram_p = histogram_p; | |
295 | (*counter)->prev_dumped_count = 0; | |
296 | (*counter)->count = 0; | |
297 | } | |
298 | return *counter; | |
299 | } | |
300 | ||
301 | /* Add statistics information about event ID in function FN. | |
302 | This will increment the counter associated with ID by INCR. | |
303 | It will also dump the event to the global statistics file if requested. */ | |
304 | ||
305 | void | |
306 | statistics_counter_event (struct function *fn, const char *id, int incr) | |
307 | { | |
308 | statistics_counter *counter; | |
309 | ||
310 | if ((!(dump_flags & TDF_STATS) | |
311 | && !statistics_dump_file) | |
312 | || incr == 0) | |
313 | return; | |
314 | ||
315 | if (current_pass | |
316 | && current_pass->static_pass_number != -1) | |
317 | { | |
318 | counter = lookup_or_add_counter (curr_statistics_hash (), id, 0, false); | |
319 | gcc_assert (!counter->histogram_p); | |
320 | counter->count += incr; | |
321 | } | |
322 | ||
323 | if (!statistics_dump_file | |
324 | || !(statistics_dump_flags & TDF_DETAILS)) | |
325 | return; | |
326 | ||
327 | fprintf (statistics_dump_file, | |
328 | "%d %s \"%s\" \"%s\" %d\n", | |
329 | current_pass ? current_pass->static_pass_number : -1, | |
330 | current_pass ? current_pass->name : "none", | |
331 | id, | |
332 | function_name (fn), | |
333 | incr); | |
334 | } | |
335 | ||
336 | /* Add statistics information about event ID in function FN with the | |
337 | histogram value VAL. | |
338 | It will dump the event to the global statistics file if requested. */ | |
339 | ||
340 | void | |
341 | statistics_histogram_event (struct function *fn, const char *id, int val) | |
342 | { | |
343 | statistics_counter *counter; | |
344 | ||
345 | if (!(dump_flags & TDF_STATS) | |
346 | && !statistics_dump_file) | |
347 | return; | |
348 | ||
349 | counter = lookup_or_add_counter (curr_statistics_hash (), id, val, true); | |
350 | gcc_assert (counter->histogram_p); | |
351 | counter->count += 1; | |
352 | ||
353 | if (!statistics_dump_file | |
354 | || !(statistics_dump_flags & TDF_DETAILS)) | |
355 | return; | |
356 | ||
357 | fprintf (statistics_dump_file, | |
358 | "%d %s \"%s == %d\" \"%s\" 1\n", | |
359 | current_pass->static_pass_number, | |
360 | current_pass->name, | |
361 | id, val, | |
362 | function_name (fn)); | |
363 | } |