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7bfefa9d | 1 | /* Miscellaneous utilities for GIMPLE streaming. Things that are used |
2 | in both input and output are here. | |
3 | ||
8e8f6434 | 4 | Copyright (C) 2009-2018 Free Software Foundation, Inc. |
7bfefa9d | 5 | Contributed by Doug Kwan <dougkwan@google.com> |
6 | ||
7 | This file is part of GCC. | |
8 | ||
9 | GCC is free software; you can redistribute it and/or modify it under | |
10 | the terms of the GNU General Public License as published by the Free | |
11 | Software Foundation; either version 3, or (at your option) any later | |
12 | version. | |
13 | ||
14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with GCC; see the file COPYING3. If not see | |
21 | <http://www.gnu.org/licenses/>. */ | |
22 | ||
23 | #include "config.h" | |
24 | #include "system.h" | |
25 | #include "coretypes.h" | |
9ef16211 | 26 | #include "backend.h" |
27 | #include "tree.h" | |
28 | #include "gimple.h" | |
7c29e30e | 29 | #include "tree-streamer.h" |
30 | #include "cgraph.h" | |
31 | #include "lto-streamer.h" | |
7bfefa9d | 32 | #include "toplev.h" |
47131315 | 33 | #include "lto-section-names.h" |
7bfefa9d | 34 | |
35 | /* Statistics gathered during LTO, WPA and LTRANS. */ | |
36 | struct lto_stats_d lto_stats; | |
37 | ||
9d75589a | 38 | /* LTO uses bitmaps with different life-times. So use a separate |
7bfefa9d | 39 | obstack for all LTO bitmaps. */ |
40 | static bitmap_obstack lto_obstack; | |
41 | static bool lto_obstack_initialized; | |
42 | ||
b0c5e347 | 43 | const char *section_name_prefix = LTO_SECTION_NAME_PREFIX; |
ba000093 | 44 | /* Set when streaming LTO for offloading compiler. */ |
45 | bool lto_stream_offload_p; | |
7bfefa9d | 46 | |
7858a084 | 47 | FILE *streamer_dump_file; |
48 | ||
7bfefa9d | 49 | /* Return a string representing LTO tag TAG. */ |
50 | ||
51 | const char * | |
52 | lto_tag_name (enum LTO_tags tag) | |
53 | { | |
54 | if (lto_tag_is_tree_code_p (tag)) | |
55 | { | |
56 | /* For tags representing tree nodes, return the name of the | |
57 | associated tree code. */ | |
f3d35d4d | 58 | return get_tree_code_name (lto_tag_to_tree_code (tag)); |
7bfefa9d | 59 | } |
60 | ||
61 | if (lto_tag_is_gimple_code_p (tag)) | |
62 | { | |
63 | /* For tags representing gimple statements, return the name of | |
64 | the associated gimple code. */ | |
65 | return gimple_code_name[lto_tag_to_gimple_code (tag)]; | |
66 | } | |
67 | ||
68 | switch (tag) | |
69 | { | |
70 | case LTO_null: | |
71 | return "LTO_null"; | |
72 | case LTO_bb0: | |
73 | return "LTO_bb0"; | |
74 | case LTO_bb1: | |
75 | return "LTO_bb1"; | |
76 | case LTO_eh_region: | |
77 | return "LTO_eh_region"; | |
78 | case LTO_function: | |
79 | return "LTO_function"; | |
80 | case LTO_eh_table: | |
81 | return "LTO_eh_table"; | |
82 | case LTO_ert_cleanup: | |
83 | return "LTO_ert_cleanup"; | |
84 | case LTO_ert_try: | |
85 | return "LTO_ert_try"; | |
86 | case LTO_ert_allowed_exceptions: | |
87 | return "LTO_ert_allowed_exceptions"; | |
88 | case LTO_ert_must_not_throw: | |
89 | return "LTO_ert_must_not_throw"; | |
90 | case LTO_tree_pickle_reference: | |
91 | return "LTO_tree_pickle_reference"; | |
92 | case LTO_field_decl_ref: | |
93 | return "LTO_field_decl_ref"; | |
94 | case LTO_function_decl_ref: | |
95 | return "LTO_function_decl_ref"; | |
96 | case LTO_label_decl_ref: | |
97 | return "LTO_label_decl_ref"; | |
98 | case LTO_namespace_decl_ref: | |
99 | return "LTO_namespace_decl_ref"; | |
100 | case LTO_result_decl_ref: | |
101 | return "LTO_result_decl_ref"; | |
102 | case LTO_ssa_name_ref: | |
103 | return "LTO_ssa_name_ref"; | |
104 | case LTO_type_decl_ref: | |
105 | return "LTO_type_decl_ref"; | |
106 | case LTO_type_ref: | |
107 | return "LTO_type_ref"; | |
108 | case LTO_global_decl_ref: | |
109 | return "LTO_global_decl_ref"; | |
110 | default: | |
111 | return "LTO_UNKNOWN"; | |
112 | } | |
113 | } | |
114 | ||
115 | ||
116 | /* Allocate a bitmap from heap. Initializes the LTO obstack if necessary. */ | |
117 | ||
118 | bitmap | |
119 | lto_bitmap_alloc (void) | |
120 | { | |
121 | if (!lto_obstack_initialized) | |
122 | { | |
123 | bitmap_obstack_initialize (<o_obstack); | |
124 | lto_obstack_initialized = true; | |
125 | } | |
126 | return BITMAP_ALLOC (<o_obstack); | |
127 | } | |
128 | ||
129 | /* Free bitmap B. */ | |
130 | ||
131 | void | |
132 | lto_bitmap_free (bitmap b) | |
133 | { | |
134 | BITMAP_FREE (b); | |
135 | } | |
136 | ||
137 | ||
138 | /* Get a section name for a particular type or name. The NAME field | |
f18bad33 | 139 | is only used if SECTION_TYPE is LTO_section_function_body. For all |
140 | others it is ignored. The callee of this function is responsible | |
141 | to free the returned name. */ | |
7bfefa9d | 142 | |
143 | char * | |
f18bad33 | 144 | lto_get_section_name (int section_type, const char *name, struct lto_file_decl_data *f) |
7bfefa9d | 145 | { |
f18bad33 | 146 | const char *add; |
147 | char post[32]; | |
148 | const char *sep; | |
149 | ||
150 | if (section_type == LTO_section_function_body) | |
7bfefa9d | 151 | { |
151a56e7 | 152 | gcc_assert (name != NULL); |
153 | if (name[0] == '*') | |
154 | name++; | |
f18bad33 | 155 | add = name; |
156 | sep = ""; | |
157 | } | |
158 | else if (section_type < LTO_N_SECTION_TYPES) | |
159 | { | |
160 | add = lto_section_name[section_type]; | |
161 | sep = "."; | |
162 | } | |
163 | else | |
164 | internal_error ("bytecode stream: unexpected LTO section %s", name); | |
7bfefa9d | 165 | |
f18bad33 | 166 | /* Make the section name unique so that ld -r combining sections |
167 | doesn't confuse the reader with merged sections. | |
7bfefa9d | 168 | |
f18bad33 | 169 | For options don't add a ID, the option reader cannot deal with them |
badc6cfa | 170 | and merging should be ok here. */ |
f18bad33 | 171 | if (section_type == LTO_section_opts) |
172 | strcpy (post, ""); | |
badc6cfa | 173 | else if (f != NULL) |
174 | sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, f->id); | |
f18bad33 | 175 | else |
badc6cfa | 176 | sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, get_random_seed (false)); |
b0c5e347 | 177 | return concat (section_name_prefix, sep, add, post, NULL); |
7bfefa9d | 178 | } |
179 | ||
180 | ||
181 | /* Show various memory usage statistics related to LTO. */ | |
182 | ||
183 | void | |
bdaea387 | 184 | print_lto_report (const char *s) |
7bfefa9d | 185 | { |
7bfefa9d | 186 | unsigned i; |
187 | ||
7bfefa9d | 188 | fprintf (stderr, "[%s] # of input files: " |
189 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, lto_stats.num_input_files); | |
190 | ||
48e1416a | 191 | fprintf (stderr, "[%s] # of input cgraph nodes: " |
7bfefa9d | 192 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
193 | lto_stats.num_input_cgraph_nodes); | |
194 | ||
195 | fprintf (stderr, "[%s] # of function bodies: " | |
196 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
197 | lto_stats.num_function_bodies); | |
198 | ||
7bfefa9d | 199 | for (i = 0; i < NUM_TREE_CODES; i++) |
200 | if (lto_stats.num_trees[i]) | |
201 | fprintf (stderr, "[%s] # of '%s' objects read: " | |
202 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
f3d35d4d | 203 | get_tree_code_name ((enum tree_code) i), lto_stats.num_trees[i]); |
7bfefa9d | 204 | |
205 | if (flag_lto) | |
206 | { | |
207 | fprintf (stderr, "[%s] Compression: " | |
208 | HOST_WIDE_INT_PRINT_UNSIGNED " output bytes, " | |
209 | HOST_WIDE_INT_PRINT_UNSIGNED " compressed bytes", s, | |
210 | lto_stats.num_output_il_bytes, | |
211 | lto_stats.num_compressed_il_bytes); | |
212 | if (lto_stats.num_output_il_bytes > 0) | |
213 | { | |
214 | const float dividend = (float) lto_stats.num_compressed_il_bytes; | |
215 | const float divisor = (float) lto_stats.num_output_il_bytes; | |
216 | fprintf (stderr, " (ratio: %f)", dividend / divisor); | |
217 | } | |
218 | fprintf (stderr, "\n"); | |
219 | } | |
220 | ||
221 | if (flag_wpa) | |
222 | { | |
223 | fprintf (stderr, "[%s] # of output files: " | |
224 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
225 | lto_stats.num_output_files); | |
226 | ||
5cf7e051 | 227 | fprintf (stderr, "[%s] # of output symtab nodes: " |
7bfefa9d | 228 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
5cf7e051 | 229 | lto_stats.num_output_symtab_nodes); |
7bfefa9d | 230 | |
8ceff600 | 231 | fprintf (stderr, "[%s] # of output tree pickle references: " |
232 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
233 | lto_stats.num_pickle_refs_output); | |
234 | fprintf (stderr, "[%s] # of output tree bodies: " | |
235 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
236 | lto_stats.num_tree_bodies_output); | |
237 | ||
7bfefa9d | 238 | fprintf (stderr, "[%s] # callgraph partitions: " |
239 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
240 | lto_stats.num_cgraph_partitions); | |
241 | ||
242 | fprintf (stderr, "[%s] Compression: " | |
243 | HOST_WIDE_INT_PRINT_UNSIGNED " input bytes, " | |
244 | HOST_WIDE_INT_PRINT_UNSIGNED " uncompressed bytes", s, | |
245 | lto_stats.num_input_il_bytes, | |
246 | lto_stats.num_uncompressed_il_bytes); | |
247 | if (lto_stats.num_input_il_bytes > 0) | |
248 | { | |
249 | const float dividend = (float) lto_stats.num_uncompressed_il_bytes; | |
250 | const float divisor = (float) lto_stats.num_input_il_bytes; | |
251 | fprintf (stderr, " (ratio: %f)", dividend / divisor); | |
252 | } | |
253 | fprintf (stderr, "\n"); | |
254 | } | |
255 | ||
256 | for (i = 0; i < LTO_N_SECTION_TYPES; i++) | |
257 | fprintf (stderr, "[%s] Size of mmap'd section %s: " | |
258 | HOST_WIDE_INT_PRINT_UNSIGNED " bytes\n", s, | |
259 | lto_section_name[i], lto_stats.section_size[i]); | |
260 | } | |
261 | ||
7bfefa9d | 262 | /* Initialization common to the LTO reader and writer. */ |
263 | ||
264 | void | |
265 | lto_streamer_init (void) | |
266 | { | |
267 | /* Check that all the TS_* handled by the reader and writer routines | |
268 | match exactly the structures defined in treestruct.def. When a | |
269 | new TS_* astructure is added, the streamer should be updated to | |
270 | handle it. */ | |
382ecba7 | 271 | if (flag_checking) |
272 | streamer_check_handled_ts_structures (); | |
7bfefa9d | 273 | } |
274 | ||
275 | ||
276 | /* Gate function for all LTO streaming passes. */ | |
277 | ||
278 | bool | |
279 | gate_lto_out (void) | |
280 | { | |
9f28dc4c | 281 | return ((flag_generate_lto || flag_generate_offload || in_lto_p) |
7bfefa9d | 282 | /* Don't bother doing anything if the program has errors. */ |
852f689e | 283 | && !seen_error ()); |
7bfefa9d | 284 | } |
285 | ||
7bfefa9d | 286 | /* Check that the version MAJOR.MINOR is the correct version number. */ |
287 | ||
288 | void | |
374d90a7 | 289 | lto_check_version (int major, int minor, const char *file_name) |
7bfefa9d | 290 | { |
291 | if (major != LTO_major_version || minor != LTO_minor_version) | |
c05be867 | 292 | fatal_error (input_location, |
c92412d2 | 293 | "bytecode stream in file %qs generated with LTO version " |
374d90a7 | 294 | "%d.%d instead of the expected %d.%d", |
295 | file_name, | |
7bfefa9d | 296 | major, minor, |
297 | LTO_major_version, LTO_minor_version); | |
298 | } | |
a0605d65 | 299 | |
300 | ||
a0605d65 | 301 | /* Initialize all the streamer hooks used for streaming GIMPLE. */ |
302 | ||
303 | void | |
304 | lto_streamer_hooks_init (void) | |
305 | { | |
306 | streamer_hooks_init (); | |
515cf651 | 307 | streamer_hooks.write_tree = lto_output_tree; |
308 | streamer_hooks.read_tree = lto_input_tree; | |
ec180527 | 309 | streamer_hooks.input_location = lto_input_location; |
310 | streamer_hooks.output_location = lto_output_location; | |
a0605d65 | 311 | } |