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d7f09764 DN |
1 | /* Miscellaneous utilities for GIMPLE streaming. Things that are used |
2 | in both input and output are here. | |
3 | ||
a5544970 | 4 | Copyright (C) 2009-2019 Free Software Foundation, Inc. |
d7f09764 DN |
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" | |
c7131fb2 AM |
26 | #include "backend.h" |
27 | #include "tree.h" | |
28 | #include "gimple.h" | |
957060b5 AM |
29 | #include "tree-streamer.h" |
30 | #include "cgraph.h" | |
31 | #include "lto-streamer.h" | |
d7f09764 | 32 | #include "toplev.h" |
4000360e | 33 | #include "lto-section-names.h" |
d7f09764 DN |
34 | |
35 | /* Statistics gathered during LTO, WPA and LTRANS. */ | |
36 | struct lto_stats_d lto_stats; | |
37 | ||
1f6be682 | 38 | const char *section_name_prefix = LTO_SECTION_NAME_PREFIX; |
1b34e6e2 BS |
39 | /* Set when streaming LTO for offloading compiler. */ |
40 | bool lto_stream_offload_p; | |
d7f09764 | 41 | |
b4da704c JH |
42 | FILE *streamer_dump_file; |
43 | ||
d7f09764 DN |
44 | /* Return a string representing LTO tag TAG. */ |
45 | ||
46 | const char * | |
47 | lto_tag_name (enum LTO_tags tag) | |
48 | { | |
49 | if (lto_tag_is_tree_code_p (tag)) | |
50 | { | |
51 | /* For tags representing tree nodes, return the name of the | |
52 | associated tree code. */ | |
5806f481 | 53 | return get_tree_code_name (lto_tag_to_tree_code (tag)); |
d7f09764 DN |
54 | } |
55 | ||
56 | if (lto_tag_is_gimple_code_p (tag)) | |
57 | { | |
58 | /* For tags representing gimple statements, return the name of | |
59 | the associated gimple code. */ | |
60 | return gimple_code_name[lto_tag_to_gimple_code (tag)]; | |
61 | } | |
62 | ||
63 | switch (tag) | |
64 | { | |
65 | case LTO_null: | |
66 | return "LTO_null"; | |
67 | case LTO_bb0: | |
68 | return "LTO_bb0"; | |
69 | case LTO_bb1: | |
70 | return "LTO_bb1"; | |
71 | case LTO_eh_region: | |
72 | return "LTO_eh_region"; | |
73 | case LTO_function: | |
74 | return "LTO_function"; | |
75 | case LTO_eh_table: | |
76 | return "LTO_eh_table"; | |
77 | case LTO_ert_cleanup: | |
78 | return "LTO_ert_cleanup"; | |
79 | case LTO_ert_try: | |
80 | return "LTO_ert_try"; | |
81 | case LTO_ert_allowed_exceptions: | |
82 | return "LTO_ert_allowed_exceptions"; | |
83 | case LTO_ert_must_not_throw: | |
84 | return "LTO_ert_must_not_throw"; | |
85 | case LTO_tree_pickle_reference: | |
86 | return "LTO_tree_pickle_reference"; | |
87 | case LTO_field_decl_ref: | |
88 | return "LTO_field_decl_ref"; | |
89 | case LTO_function_decl_ref: | |
90 | return "LTO_function_decl_ref"; | |
91 | case LTO_label_decl_ref: | |
92 | return "LTO_label_decl_ref"; | |
93 | case LTO_namespace_decl_ref: | |
94 | return "LTO_namespace_decl_ref"; | |
95 | case LTO_result_decl_ref: | |
96 | return "LTO_result_decl_ref"; | |
97 | case LTO_ssa_name_ref: | |
98 | return "LTO_ssa_name_ref"; | |
99 | case LTO_type_decl_ref: | |
100 | return "LTO_type_decl_ref"; | |
101 | case LTO_type_ref: | |
102 | return "LTO_type_ref"; | |
103 | case LTO_global_decl_ref: | |
104 | return "LTO_global_decl_ref"; | |
105 | default: | |
106 | return "LTO_UNKNOWN"; | |
107 | } | |
108 | } | |
109 | ||
110 | ||
d7f09764 | 111 | /* Get a section name for a particular type or name. The NAME field |
73ce4d1e AK |
112 | is only used if SECTION_TYPE is LTO_section_function_body. For all |
113 | others it is ignored. The callee of this function is responsible | |
114 | to free the returned name. */ | |
d7f09764 DN |
115 | |
116 | char * | |
73ce4d1e | 117 | lto_get_section_name (int section_type, const char *name, struct lto_file_decl_data *f) |
d7f09764 | 118 | { |
73ce4d1e AK |
119 | const char *add; |
120 | char post[32]; | |
121 | const char *sep; | |
122 | ||
123 | if (section_type == LTO_section_function_body) | |
d7f09764 | 124 | { |
91539475 L |
125 | gcc_assert (name != NULL); |
126 | if (name[0] == '*') | |
127 | name++; | |
73ce4d1e AK |
128 | add = name; |
129 | sep = ""; | |
130 | } | |
131 | else if (section_type < LTO_N_SECTION_TYPES) | |
132 | { | |
133 | add = lto_section_name[section_type]; | |
134 | sep = "."; | |
135 | } | |
136 | else | |
137 | internal_error ("bytecode stream: unexpected LTO section %s", name); | |
d7f09764 | 138 | |
73ce4d1e AK |
139 | /* Make the section name unique so that ld -r combining sections |
140 | doesn't confuse the reader with merged sections. | |
d7f09764 | 141 | |
73ce4d1e | 142 | For options don't add a ID, the option reader cannot deal with them |
dde8b360 | 143 | and merging should be ok here. */ |
73ce4d1e AK |
144 | if (section_type == LTO_section_opts) |
145 | strcpy (post, ""); | |
dde8b360 AK |
146 | else if (f != NULL) |
147 | sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, f->id); | |
73ce4d1e | 148 | else |
dde8b360 | 149 | sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, get_random_seed (false)); |
1f6be682 | 150 | return concat (section_name_prefix, sep, add, post, NULL); |
d7f09764 DN |
151 | } |
152 | ||
153 | ||
154 | /* Show various memory usage statistics related to LTO. */ | |
155 | ||
156 | void | |
b8f4e58f | 157 | print_lto_report (const char *s) |
d7f09764 | 158 | { |
d7f09764 DN |
159 | unsigned i; |
160 | ||
d7f09764 DN |
161 | fprintf (stderr, "[%s] # of input files: " |
162 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, lto_stats.num_input_files); | |
163 | ||
b8698a0f | 164 | fprintf (stderr, "[%s] # of input cgraph nodes: " |
d7f09764 DN |
165 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
166 | lto_stats.num_input_cgraph_nodes); | |
167 | ||
168 | fprintf (stderr, "[%s] # of function bodies: " | |
169 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
170 | lto_stats.num_function_bodies); | |
171 | ||
d7f09764 DN |
172 | for (i = 0; i < NUM_TREE_CODES; i++) |
173 | if (lto_stats.num_trees[i]) | |
174 | fprintf (stderr, "[%s] # of '%s' objects read: " | |
175 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
5806f481 | 176 | get_tree_code_name ((enum tree_code) i), lto_stats.num_trees[i]); |
d7f09764 DN |
177 | |
178 | if (flag_lto) | |
179 | { | |
180 | fprintf (stderr, "[%s] Compression: " | |
181 | HOST_WIDE_INT_PRINT_UNSIGNED " output bytes, " | |
182 | HOST_WIDE_INT_PRINT_UNSIGNED " compressed bytes", s, | |
183 | lto_stats.num_output_il_bytes, | |
184 | lto_stats.num_compressed_il_bytes); | |
185 | if (lto_stats.num_output_il_bytes > 0) | |
186 | { | |
187 | const float dividend = (float) lto_stats.num_compressed_il_bytes; | |
188 | const float divisor = (float) lto_stats.num_output_il_bytes; | |
189 | fprintf (stderr, " (ratio: %f)", dividend / divisor); | |
190 | } | |
191 | fprintf (stderr, "\n"); | |
192 | } | |
193 | ||
194 | if (flag_wpa) | |
195 | { | |
196 | fprintf (stderr, "[%s] # of output files: " | |
197 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
198 | lto_stats.num_output_files); | |
199 | ||
7b99cca4 | 200 | fprintf (stderr, "[%s] # of output symtab nodes: " |
d7f09764 | 201 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
7b99cca4 | 202 | lto_stats.num_output_symtab_nodes); |
d7f09764 | 203 | |
ee03e71d RB |
204 | fprintf (stderr, "[%s] # of output tree pickle references: " |
205 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
206 | lto_stats.num_pickle_refs_output); | |
207 | fprintf (stderr, "[%s] # of output tree bodies: " | |
208 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
209 | lto_stats.num_tree_bodies_output); | |
210 | ||
d7f09764 DN |
211 | fprintf (stderr, "[%s] # callgraph partitions: " |
212 | HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
213 | lto_stats.num_cgraph_partitions); | |
214 | ||
215 | fprintf (stderr, "[%s] Compression: " | |
216 | HOST_WIDE_INT_PRINT_UNSIGNED " input bytes, " | |
217 | HOST_WIDE_INT_PRINT_UNSIGNED " uncompressed bytes", s, | |
218 | lto_stats.num_input_il_bytes, | |
219 | lto_stats.num_uncompressed_il_bytes); | |
220 | if (lto_stats.num_input_il_bytes > 0) | |
221 | { | |
222 | const float dividend = (float) lto_stats.num_uncompressed_il_bytes; | |
223 | const float divisor = (float) lto_stats.num_input_il_bytes; | |
224 | fprintf (stderr, " (ratio: %f)", dividend / divisor); | |
225 | } | |
226 | fprintf (stderr, "\n"); | |
227 | } | |
228 | ||
229 | for (i = 0; i < LTO_N_SECTION_TYPES; i++) | |
230 | fprintf (stderr, "[%s] Size of mmap'd section %s: " | |
231 | HOST_WIDE_INT_PRINT_UNSIGNED " bytes\n", s, | |
232 | lto_section_name[i], lto_stats.section_size[i]); | |
233 | } | |
234 | ||
d7f09764 DN |
235 | /* Initialization common to the LTO reader and writer. */ |
236 | ||
237 | void | |
238 | lto_streamer_init (void) | |
239 | { | |
240 | /* Check that all the TS_* handled by the reader and writer routines | |
241 | match exactly the structures defined in treestruct.def. When a | |
242 | new TS_* astructure is added, the streamer should be updated to | |
243 | handle it. */ | |
b2b29377 MM |
244 | if (flag_checking) |
245 | streamer_check_handled_ts_structures (); | |
d7f09764 DN |
246 | } |
247 | ||
248 | ||
249 | /* Gate function for all LTO streaming passes. */ | |
250 | ||
251 | bool | |
252 | gate_lto_out (void) | |
253 | { | |
f0d78df9 | 254 | return ((flag_generate_lto || flag_generate_offload || in_lto_p) |
d7f09764 | 255 | /* Don't bother doing anything if the program has errors. */ |
1da2ed5f | 256 | && !seen_error ()); |
d7f09764 DN |
257 | } |
258 | ||
d7f09764 DN |
259 | /* Check that the version MAJOR.MINOR is the correct version number. */ |
260 | ||
261 | void | |
b898d037 | 262 | lto_check_version (int major, int minor, const char *file_name) |
d7f09764 DN |
263 | { |
264 | if (major != LTO_major_version || minor != LTO_minor_version) | |
40fecdd6 | 265 | fatal_error (input_location, |
84671705 | 266 | "bytecode stream in file %qs generated with LTO version " |
b898d037 ML |
267 | "%d.%d instead of the expected %d.%d", |
268 | file_name, | |
d7f09764 DN |
269 | major, minor, |
270 | LTO_major_version, LTO_minor_version); | |
271 | } | |
47c79d56 DN |
272 | |
273 | ||
47c79d56 DN |
274 | /* Initialize all the streamer hooks used for streaming GIMPLE. */ |
275 | ||
276 | void | |
277 | lto_streamer_hooks_init (void) | |
278 | { | |
279 | streamer_hooks_init (); | |
b9393656 DN |
280 | streamer_hooks.write_tree = lto_output_tree; |
281 | streamer_hooks.read_tree = lto_input_tree; | |
7cb7d208 RB |
282 | streamer_hooks.input_location = lto_input_location; |
283 | streamer_hooks.output_location = lto_output_location; | |
47c79d56 | 284 | } |