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d7f09764 DN |
1 | /* Data structures and declarations used for reading and writing |
2 | GIMPLE to a file stream. | |
3 | ||
8d9254fc | 4 | Copyright (C) 2009-2020 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 | #ifndef GCC_LTO_STREAMER_H | |
24 | #define GCC_LTO_STREAMER_H | |
25 | ||
26 | #include "plugin-api.h" | |
db0bf14f | 27 | #include "gcov-io.h" |
f0efc7aa | 28 | #include "diagnostic.h" |
47c79d56 | 29 | |
d7f09764 DN |
30 | /* The encoding for a function consists of the following sections: |
31 | ||
32 | 1) The header. | |
33 | 2) FIELD_DECLS. | |
34 | 3) FUNCTION_DECLS. | |
35 | 4) global VAR_DECLS. | |
36 | 5) type_decls | |
37 | 6) types. | |
38 | 7) Names for the labels that have names | |
39 | 8) The SSA names. | |
40 | 9) The control flow graph. | |
41 | 10-11)Gimple for local decls. | |
42 | 12) Gimple for the function. | |
43 | 13) Strings. | |
44 | ||
45 | 1) THE HEADER. | |
46 | 2-6) THE GLOBAL DECLS AND TYPES. | |
47 | ||
48 | The global decls and types are encoded in the same way. For each | |
49 | entry, there is word with the offset within the section to the | |
50 | entry. | |
51 | ||
b8698a0f | 52 | 7) THE LABEL NAMES. |
d7f09764 DN |
53 | |
54 | Since most labels do not have names, this section my be of zero | |
55 | length. It consists of an array of string table references, one | |
56 | per label. In the lto code, the labels are given either | |
57 | positive or negative indexes. the positive ones have names and | |
58 | the negative ones do not. The positive index can be used to | |
59 | find the name in this array. | |
60 | ||
b8698a0f | 61 | 9) THE CFG. |
d7f09764 DN |
62 | |
63 | 10) Index into the local decls. Since local decls can have local | |
64 | decls inside them, they must be read in randomly in order to | |
b8698a0f | 65 | properly restore them. |
d7f09764 DN |
66 | |
67 | 11-12) GIMPLE FOR THE LOCAL DECLS AND THE FUNCTION BODY. | |
68 | ||
69 | The gimple consists of a set of records. | |
70 | ||
71 | THE FUNCTION | |
b8698a0f | 72 | |
d7f09764 DN |
73 | At the top level of (8) is the function. It consists of five |
74 | pieces: | |
75 | ||
76 | LTO_function - The tag. | |
77 | eh tree - This is all of the exception handling regions | |
78 | put out in a post order traversial of the | |
79 | tree. Siblings are output as lists terminated | |
80 | by a 0. The set of fields matches the fields | |
81 | defined in except.c. | |
82 | ||
83 | last_basic_block - in uleb128 form. | |
84 | ||
85 | basic blocks - This is the set of basic blocks. | |
86 | ||
87 | zero - The termination of the basic blocks. | |
88 | ||
89 | BASIC BLOCKS | |
90 | ||
91 | There are two forms of basic blocks depending on if they are | |
92 | empty or not. | |
93 | ||
94 | The basic block consists of: | |
95 | ||
96 | LTO_bb1 or LTO_bb0 - The tag. | |
97 | ||
98 | bb->index - the index in uleb128 form. | |
99 | ||
100 | #succs - The number of successors un uleb128 form. | |
101 | ||
102 | the successors - For each edge, a pair. The first of the | |
103 | pair is the index of the successor in | |
104 | uleb128 form and the second are the flags in | |
105 | uleb128 form. | |
106 | ||
107 | the statements - A gimple tree, as described above. | |
108 | These are only present for LTO_BB1. | |
109 | Following each statement is an optional | |
110 | exception handling record LTO_eh_region | |
111 | which contains the region number (for | |
112 | regions >= 0). | |
113 | ||
114 | zero - This is only present for LTO_BB1 and is used | |
115 | to terminate the statements and exception | |
116 | regions within this block. | |
117 | ||
118 | 12) STRINGS | |
119 | ||
120 | String are represented in the table as pairs, a length in ULEB128 | |
121 | form followed by the data for the string. */ | |
122 | ||
86c23d93 | 123 | #define LTO_major_version 9 |
15b25b24 | 124 | #define LTO_minor_version 0 |
d7f09764 DN |
125 | |
126 | typedef unsigned char lto_decl_flags_t; | |
127 | ||
128 | ||
d7f09764 DN |
129 | /* Tags representing the various IL objects written to the bytecode file |
130 | (GIMPLE statements, basic blocks, EH regions, tree nodes, etc). | |
131 | ||
132 | NOTE, when adding new LTO tags, also update lto_tag_name. */ | |
b8698a0f | 133 | enum LTO_tags |
d7f09764 DN |
134 | { |
135 | LTO_null = 0, | |
136 | ||
15d16c8a RB |
137 | /* Special for streamer. Reference to previously-streamed node. */ |
138 | LTO_tree_pickle_reference, | |
139 | ||
d7f09764 DN |
140 | /* Reserve enough entries to fit all the tree and gimple codes handled |
141 | by the streamer. This guarantees that: | |
142 | ||
143 | 1- Given a tree code C: | |
144 | enum LTO_tags tag == C + 1 | |
145 | ||
146 | 2- Given a gimple code C: | |
147 | enum LTO_tags tag == C + NUM_TREE_CODES + 1 | |
148 | ||
149 | Conversely, to map between LTO tags and tree/gimple codes, the | |
150 | reverse operation must be applied. */ | |
07233947 | 151 | LTO_bb0 = 1 + MAX_TREE_CODES + LAST_AND_UNUSED_GIMPLE_CODE, |
d7f09764 DN |
152 | LTO_bb1, |
153 | ||
154 | /* EH region holding the previous statement. */ | |
155 | LTO_eh_region, | |
156 | ||
c61f8c3b RG |
157 | /* Shared INTEGER_CST node. */ |
158 | LTO_integer_cst, | |
159 | ||
d7f09764 DN |
160 | /* Function body. */ |
161 | LTO_function, | |
162 | ||
163 | /* EH table. */ | |
164 | LTO_eh_table, | |
165 | ||
166 | /* EH region types. These mirror enum eh_region_type. */ | |
167 | LTO_ert_cleanup, | |
168 | LTO_ert_try, | |
169 | LTO_ert_allowed_exceptions, | |
170 | LTO_ert_must_not_throw, | |
171 | ||
172 | /* EH landing pad. */ | |
173 | LTO_eh_landing_pad, | |
174 | ||
175 | /* EH try/catch node. */ | |
176 | LTO_eh_catch, | |
177 | ||
ee03e71d RB |
178 | /* Special for global streamer. A blob of unnamed tree nodes. */ |
179 | LTO_tree_scc, | |
180 | ||
d7f09764 DN |
181 | /* References to indexable tree nodes. These objects are stored in |
182 | tables that are written separately from the function bodies that | |
183 | reference them. This way they can be instantiated even when the | |
184 | referencing functions aren't (e.g., during WPA) and it also allows | |
185 | functions to be copied from one file to another without having | |
186 | to unpickle the body first (the references are location | |
187 | independent). | |
188 | ||
189 | NOTE, do not regroup these values as the grouping is exposed | |
190 | in the range checks done in lto_input_tree. */ | |
191 | LTO_field_decl_ref, /* Do not change. */ | |
192 | LTO_function_decl_ref, | |
193 | LTO_label_decl_ref, | |
194 | LTO_namespace_decl_ref, | |
195 | LTO_result_decl_ref, | |
196 | LTO_ssa_name_ref, | |
197 | LTO_type_decl_ref, | |
198 | LTO_type_ref, | |
199 | LTO_const_decl_ref, | |
200 | LTO_imported_decl_ref, | |
6be14c0e | 201 | LTO_translation_unit_decl_ref, |
5f673c6a TB |
202 | LTO_global_decl_ref, |
203 | LTO_namelist_decl_ref, /* Do not change. */ | |
d7f09764 DN |
204 | |
205 | /* This tag must always be last. */ | |
206 | LTO_NUM_TAGS | |
207 | }; | |
208 | ||
209 | ||
210 | /* Set of section types that are in an LTO file. This list will grow | |
211 | as the number of IPA passes grows since each IPA pass will need its | |
212 | own section type to store its summary information. | |
213 | ||
214 | When adding a new section type, you must also extend the | |
215 | LTO_SECTION_NAME array in lto-section-in.c. */ | |
216 | enum lto_section_type | |
217 | { | |
218 | LTO_section_decls = 0, | |
219 | LTO_section_function_body, | |
220 | LTO_section_static_initializer, | |
ab96cc5b | 221 | LTO_section_symtab, |
c8429c2a | 222 | LTO_section_symtab_extension, |
369451ec | 223 | LTO_section_refs, |
49f836ba | 224 | LTO_section_asm, |
fb3f88cc | 225 | LTO_section_jump_functions, |
d7f09764 DN |
226 | LTO_section_ipa_pure_const, |
227 | LTO_section_ipa_reference, | |
0208f7da | 228 | LTO_section_ipa_profile, |
ab96cc5b | 229 | LTO_section_symtab_nodes, |
d7f09764 | 230 | LTO_section_opts, |
922f15c2 | 231 | LTO_section_cgraph_opt_sum, |
0bceb671 | 232 | LTO_section_ipa_fn_summary, |
2c9561b5 | 233 | LTO_section_ipcp_transform, |
b84d4347 | 234 | LTO_section_ipa_icf, |
ec6fe917 | 235 | LTO_section_offload_table, |
db847fa8 | 236 | LTO_section_mode_table, |
b2b40051 | 237 | LTO_section_ipa_hsa, |
88614dfa | 238 | LTO_section_lto, |
ff6686d2 | 239 | LTO_section_ipa_sra, |
d7f09764 DN |
240 | LTO_N_SECTION_TYPES /* Must be last. */ |
241 | }; | |
242 | ||
243 | /* Indices to the various function, type and symbol streams. */ | |
84562394 | 244 | enum lto_decl_stream_e_t |
d7f09764 DN |
245 | { |
246 | LTO_DECL_STREAM_TYPE = 0, /* Must be first. */ | |
247 | LTO_DECL_STREAM_FIELD_DECL, | |
248 | LTO_DECL_STREAM_FN_DECL, | |
249 | LTO_DECL_STREAM_VAR_DECL, | |
250 | LTO_DECL_STREAM_TYPE_DECL, | |
251 | LTO_DECL_STREAM_NAMESPACE_DECL, | |
252 | LTO_DECL_STREAM_LABEL_DECL, | |
253 | LTO_N_DECL_STREAMS | |
84562394 | 254 | }; |
d7f09764 DN |
255 | |
256 | typedef enum ld_plugin_symbol_resolution ld_plugin_symbol_resolution_t; | |
d7f09764 DN |
257 | |
258 | ||
259 | /* Macro to define convenience functions for type and decl streams | |
b8698a0f | 260 | in lto_file_decl_data. */ |
d7f09764 DN |
261 | #define DEFINE_DECL_STREAM_FUNCS(UPPER_NAME, name) \ |
262 | static inline tree \ | |
263 | lto_file_decl_data_get_ ## name (struct lto_file_decl_data *data, \ | |
264 | unsigned int idx) \ | |
265 | { \ | |
266 | struct lto_in_decl_state *state = data->current_decl_state; \ | |
9c71e9df | 267 | return (*state->streams[LTO_DECL_STREAM_## UPPER_NAME])[idx]; \ |
d7f09764 DN |
268 | } \ |
269 | \ | |
270 | static inline unsigned int \ | |
271 | lto_file_decl_data_num_ ## name ## s (struct lto_file_decl_data *data) \ | |
272 | { \ | |
273 | struct lto_in_decl_state *state = data->current_decl_state; \ | |
9c71e9df | 274 | return vec_safe_length (state->streams[LTO_DECL_STREAM_## UPPER_NAME]); \ |
d7f09764 DN |
275 | } |
276 | ||
277 | ||
278 | /* Return a char pointer to the start of a data stream for an lto pass | |
279 | or function. The first parameter is the file data that contains | |
280 | the information. The second parameter is the type of information | |
281 | to be obtained. The third parameter is the name of the function | |
b8698a0f | 282 | and is only used when finding a function body; otherwise it is |
d7f09764 | 283 | NULL. The fourth parameter is the length of the data returned. */ |
b8698a0f | 284 | typedef const char* (lto_get_section_data_f) (struct lto_file_decl_data *, |
d7f09764 | 285 | enum lto_section_type, |
b8698a0f | 286 | const char *, |
3c56d8d8 | 287 | int, |
d7f09764 DN |
288 | size_t *); |
289 | ||
290 | /* Return the data found from the above call. The first three | |
291 | parameters are the same as above. The fourth parameter is the data | |
073a8998 | 292 | itself and the fifth is the length of the data. */ |
b8698a0f | 293 | typedef void (lto_free_section_data_f) (struct lto_file_decl_data *, |
d7f09764 DN |
294 | enum lto_section_type, |
295 | const char *, | |
296 | const char *, | |
297 | size_t); | |
298 | ||
eaeec5ec | 299 | /* The location cache holds expanded locations for streamed in trees. |
e4112065 | 300 | This is done to reduce memory usage of libcpp linemap that strongly prefers |
eaeec5ec JH |
301 | locations to be inserted in the soruce order. */ |
302 | ||
303 | class lto_location_cache | |
304 | { | |
305 | public: | |
306 | /* Apply all changes in location cache. Add locations into linemap and patch | |
307 | trees. */ | |
308 | bool apply_location_cache (); | |
309 | /* Tree merging did not suceed; mark all changes in the cache as accepted. */ | |
310 | void accept_location_cache (); | |
311 | /* Tree merging did suceed; throw away recent changes. */ | |
312 | void revert_location_cache (); | |
313 | void input_location (location_t *loc, struct bitpack_d *bp, | |
99b1c316 | 314 | class data_in *data_in); |
eaeec5ec JH |
315 | lto_location_cache () |
316 | : loc_cache (), accepted_length (0), current_file (NULL), current_line (0), | |
a9dfad6d | 317 | current_col (0), current_sysp (false), current_loc (UNKNOWN_LOCATION) |
eaeec5ec JH |
318 | { |
319 | gcc_assert (!current_cache); | |
320 | current_cache = this; | |
321 | } | |
322 | ~lto_location_cache () | |
323 | { | |
324 | apply_location_cache (); | |
325 | gcc_assert (current_cache == this); | |
326 | current_cache = NULL; | |
327 | } | |
328 | ||
329 | /* There can be at most one instance of location cache (combining multiple | |
330 | would bring it out of sync with libcpp linemap); point to current | |
331 | one. */ | |
332 | static lto_location_cache *current_cache; | |
333 | ||
334 | private: | |
335 | static int cmp_loc (const void *pa, const void *pb); | |
336 | ||
337 | struct cached_location | |
338 | { | |
339 | const char *file; | |
340 | location_t *loc; | |
341 | int line, col; | |
6c1bc27c | 342 | bool sysp; |
eaeec5ec JH |
343 | }; |
344 | ||
345 | /* The location cache. */ | |
346 | ||
50cfd44e | 347 | auto_vec<cached_location> loc_cache; |
eaeec5ec JH |
348 | |
349 | /* Accepted entries are ones used by trees that are known to be not unified | |
350 | by tree merging. */ | |
351 | ||
352 | int accepted_length; | |
353 | ||
354 | /* Bookkeeping to remember state in between calls to lto_apply_location_cache | |
355 | When streaming gimple, the location cache is not used and thus | |
356 | lto_apply_location_cache happens per location basis. It is then | |
357 | useful to avoid redundant calls of linemap API. */ | |
358 | ||
359 | const char *current_file; | |
360 | int current_line; | |
361 | int current_col; | |
6c1bc27c | 362 | bool current_sysp; |
eaeec5ec JH |
363 | location_t current_loc; |
364 | }; | |
365 | ||
d7f09764 | 366 | /* Structure used as buffer for reading an LTO file. */ |
207c68cd | 367 | class lto_input_block |
d7f09764 | 368 | { |
207c68cd RB |
369 | public: |
370 | /* Special constructor for the string table, it abuses this to | |
371 | do random access but use the uhwi decoder. */ | |
db847fa8 JJ |
372 | lto_input_block (const char *data_, unsigned int p_, unsigned int len_, |
373 | const unsigned char *mode_table_) | |
374 | : data (data_), mode_table (mode_table_), p (p_), len (len_) {} | |
375 | lto_input_block (const char *data_, unsigned int len_, | |
376 | const unsigned char *mode_table_) | |
377 | : data (data_), mode_table (mode_table_), p (0), len (len_) {} | |
207c68cd | 378 | |
d7f09764 | 379 | const char *data; |
db847fa8 | 380 | const unsigned char *mode_table; |
d7f09764 DN |
381 | unsigned int p; |
382 | unsigned int len; | |
383 | }; | |
384 | ||
88614dfa | 385 | /* Compression algorithm used for compression of LTO bytecode. */ |
d7f09764 | 386 | |
88614dfa ML |
387 | enum lto_compression |
388 | { | |
389 | ZLIB, | |
390 | ZSTD | |
391 | }; | |
392 | ||
393 | /* Structure that represents LTO ELF section with information | |
394 | about the format. */ | |
395 | ||
396 | struct lto_section | |
d7f09764 DN |
397 | { |
398 | int16_t major_version; | |
399 | int16_t minor_version; | |
d1caf05a ML |
400 | unsigned char slim_object; |
401 | ||
402 | /* Flags is a private field that is not defined publicly. */ | |
403 | uint16_t flags; | |
404 | ||
405 | /* Set compression to FLAGS. */ | |
406 | inline void set_compression (lto_compression c) | |
407 | { | |
408 | flags = c; | |
409 | } | |
410 | ||
411 | /* Get compression from FLAGS. */ | |
412 | inline lto_compression get_compression () | |
413 | { | |
414 | return (lto_compression) flags; | |
415 | } | |
d7f09764 DN |
416 | }; |
417 | ||
88614dfa ML |
418 | STATIC_ASSERT (sizeof (lto_section) == 8); |
419 | ||
207c68cd RB |
420 | /* The is the first part of the record in an LTO file for many of the |
421 | IPA passes. */ | |
88614dfa | 422 | struct lto_simple_header |
d7f09764 | 423 | { |
207c68cd RB |
424 | /* Size of main gimple body of function. */ |
425 | int32_t main_size; | |
426 | }; | |
d7f09764 | 427 | |
207c68cd RB |
428 | struct lto_simple_header_with_strings : lto_simple_header |
429 | { | |
d7f09764 DN |
430 | /* Size of the string table. */ |
431 | int32_t string_size; | |
432 | }; | |
433 | ||
207c68cd RB |
434 | /* The header for a function body. */ |
435 | struct lto_function_header : lto_simple_header_with_strings | |
436 | { | |
437 | /* Size of the cfg. */ | |
438 | int32_t cfg_size; | |
439 | }; | |
440 | ||
d7f09764 DN |
441 | |
442 | /* Structure describing a symbol section. */ | |
207c68cd | 443 | struct lto_decl_header : lto_simple_header_with_strings |
d7f09764 | 444 | { |
d7f09764 DN |
445 | /* Size of region for decl state. */ |
446 | int32_t decl_state_size; | |
447 | ||
448 | /* Number of nodes in globals stream. */ | |
449 | int32_t num_nodes; | |
49f836ba JB |
450 | }; |
451 | ||
452 | ||
d7f09764 DN |
453 | /* Statistics gathered during LTO, WPA and LTRANS. */ |
454 | struct lto_stats_d | |
455 | { | |
456 | unsigned HOST_WIDE_INT num_input_cgraph_nodes; | |
7b99cca4 | 457 | unsigned HOST_WIDE_INT num_output_symtab_nodes; |
d7f09764 DN |
458 | unsigned HOST_WIDE_INT num_input_files; |
459 | unsigned HOST_WIDE_INT num_output_files; | |
460 | unsigned HOST_WIDE_INT num_cgraph_partitions; | |
461 | unsigned HOST_WIDE_INT section_size[LTO_N_SECTION_TYPES]; | |
462 | unsigned HOST_WIDE_INT num_function_bodies; | |
463 | unsigned HOST_WIDE_INT num_trees[NUM_TREE_CODES]; | |
464 | unsigned HOST_WIDE_INT num_output_il_bytes; | |
465 | unsigned HOST_WIDE_INT num_compressed_il_bytes; | |
466 | unsigned HOST_WIDE_INT num_input_il_bytes; | |
467 | unsigned HOST_WIDE_INT num_uncompressed_il_bytes; | |
ee03e71d RB |
468 | unsigned HOST_WIDE_INT num_tree_bodies_output; |
469 | unsigned HOST_WIDE_INT num_pickle_refs_output; | |
d7f09764 DN |
470 | }; |
471 | ||
7b99cca4 | 472 | /* Entry of LTO symtab encoder. */ |
84562394 | 473 | struct lto_encoder_entry |
7b99cca4 | 474 | { |
5e20cdc9 | 475 | symtab_node *node; |
7b99cca4 JH |
476 | /* Is the node in this partition (i.e. ltrans of this partition will |
477 | be responsible for outputting it)? */ | |
478 | unsigned int in_partition:1; | |
479 | /* Do we encode body in this partition? */ | |
480 | unsigned int body:1; | |
481 | /* Do we encode initializer in this partition? | |
482 | For example the readonly variable initializers are encoded to aid | |
483 | constant folding even if they are not in the partition. */ | |
484 | unsigned int initializer:1; | |
84562394 | 485 | }; |
7b99cca4 | 486 | |
7b99cca4 | 487 | |
d7f09764 | 488 | /* Encoder data structure used to stream callgraph nodes. */ |
7380e6ef | 489 | struct lto_symtab_encoder_d |
d7f09764 | 490 | { |
9771b263 | 491 | vec<lto_encoder_entry> nodes; |
b787e7a2 | 492 | hash_map<symtab_node *, size_t> *map; |
2f41ecf5 | 493 | }; |
7380e6ef JH |
494 | |
495 | typedef struct lto_symtab_encoder_d *lto_symtab_encoder_t; | |
2f41ecf5 | 496 | |
f27c1867 | 497 | /* Iterator structure for cgraph node sets. */ |
84562394 | 498 | struct lto_symtab_encoder_iterator |
703e95cf | 499 | { |
f27c1867 JH |
500 | lto_symtab_encoder_t encoder; |
501 | unsigned index; | |
84562394 | 502 | }; |
f27c1867 JH |
503 | |
504 | ||
505 | ||
d7f09764 DN |
506 | /* The lto_tree_ref_encoder struct is used to encode trees into indices. */ |
507 | ||
508 | struct lto_tree_ref_encoder | |
509 | { | |
1eb68d2d | 510 | hash_map<tree, unsigned> *tree_hash_table; /* Maps pointers to indices. */ |
d579fcda | 511 | vec<tree> trees; /* Maps indices to pointers. */ |
d7f09764 DN |
512 | }; |
513 | ||
514 | ||
515 | /* Structure to hold states of input scope. */ | |
907dadbd | 516 | struct GTY((for_user)) lto_in_decl_state |
d7f09764 DN |
517 | { |
518 | /* Array of lto_in_decl_buffers to store type and decls streams. */ | |
9c71e9df | 519 | vec<tree, va_gc> *streams[LTO_N_DECL_STREAMS]; |
d7f09764 DN |
520 | |
521 | /* If this in-decl state is associated with a function. FN_DECL | |
522 | point to the FUNCTION_DECL. */ | |
523 | tree fn_decl; | |
ca834876 JH |
524 | |
525 | /* True if decl state is compressed. */ | |
526 | bool compressed; | |
d7f09764 DN |
527 | }; |
528 | ||
529 | typedef struct lto_in_decl_state *lto_in_decl_state_ptr; | |
530 | ||
ca752f39 | 531 | struct decl_state_hasher : ggc_ptr_hash<lto_in_decl_state> |
907dadbd TS |
532 | { |
533 | static hashval_t | |
534 | hash (lto_in_decl_state *s) | |
535 | { | |
536 | return htab_hash_pointer (s->fn_decl); | |
537 | } | |
538 | ||
539 | static bool | |
540 | equal (lto_in_decl_state *a, lto_in_decl_state *b) | |
541 | { | |
542 | return a->fn_decl == b->fn_decl; | |
543 | } | |
544 | }; | |
d7f09764 DN |
545 | |
546 | /* The structure that holds all of the vectors of global types, | |
547 | decls and cgraph nodes used in the serialization of this file. */ | |
548 | struct lto_out_decl_state | |
549 | { | |
550 | /* The buffers contain the sets of decls of various kinds and types we have | |
551 | seen so far and the indexes assigned to them. */ | |
552 | struct lto_tree_ref_encoder streams[LTO_N_DECL_STREAMS]; | |
553 | ||
554 | /* Encoder for cgraph nodes. */ | |
7380e6ef | 555 | lto_symtab_encoder_t symtab_node_encoder; |
2f41ecf5 | 556 | |
d7f09764 DN |
557 | /* If this out-decl state belongs to a function, fn_decl points to that |
558 | function. Otherwise, it is NULL. */ | |
559 | tree fn_decl; | |
ca834876 JH |
560 | |
561 | /* True if decl state is compressed. */ | |
562 | bool compressed; | |
d7f09764 DN |
563 | }; |
564 | ||
565 | typedef struct lto_out_decl_state *lto_out_decl_state_ptr; | |
566 | ||
d7f09764 | 567 | |
aed7d7cf AK |
568 | /* Compact representation of a index <-> resolution pair. Unpacked to an |
569 | vector later. */ | |
570 | struct res_pair | |
571 | { | |
572 | ld_plugin_symbol_resolution_t res; | |
573 | unsigned index; | |
574 | }; | |
aed7d7cf | 575 | |
aed7d7cf | 576 | |
d7f09764 DN |
577 | /* One of these is allocated for each object file that being compiled |
578 | by lto. This structure contains the tables that are needed by the | |
579 | serialized functions and ipa passes to connect themselves to the | |
580 | global types and decls as they are reconstituted. */ | |
49ba8180 | 581 | struct GTY(()) lto_file_decl_data |
d7f09764 DN |
582 | { |
583 | /* Decl state currently used. */ | |
584 | struct lto_in_decl_state *current_decl_state; | |
585 | ||
586 | /* Decl state corresponding to regions outside of any functions | |
587 | in the compilation unit. */ | |
588 | struct lto_in_decl_state *global_decl_state; | |
589 | ||
590 | /* Table of cgraph nodes present in this file. */ | |
7380e6ef | 591 | lto_symtab_encoder_t GTY((skip)) symtab_node_encoder; |
2f41ecf5 | 592 | |
d7f09764 | 593 | /* Hash table maps lto-related section names to location in file. */ |
907dadbd | 594 | hash_table<decl_state_hasher> *function_decl_states; |
d7f09764 DN |
595 | |
596 | /* The .o file that these offsets relate to. */ | |
49ba8180 | 597 | const char *GTY((skip)) file_name; |
d7f09764 | 598 | |
d7f09764 | 599 | /* Hash table maps lto-related section names to location in file. */ |
49ba8180 | 600 | htab_t GTY((skip)) section_hash_table; |
d7f09764 DN |
601 | |
602 | /* Hash new name of renamed global declaration to its original name. */ | |
49ba8180 | 603 | htab_t GTY((skip)) renaming_hash_table; |
73ce4d1e AK |
604 | |
605 | /* Linked list used temporarily in reader */ | |
606 | struct lto_file_decl_data *next; | |
607 | ||
ebad2eee JH |
608 | /* Order in which the file appears on the command line. */ |
609 | int order; | |
610 | ||
73ce4d1e | 611 | /* Sub ID for merged objects. */ |
dde8b360 | 612 | unsigned HOST_WIDE_INT id; |
73ce4d1e AK |
613 | |
614 | /* Symbol resolutions for this file */ | |
9771b263 | 615 | vec<res_pair> GTY((skip)) respairs; |
aed7d7cf | 616 | unsigned max_index; |
db0bf14f | 617 | |
7f3577f5 | 618 | gcov_summary GTY((skip)) profile_info; |
bbf9ad07 JH |
619 | |
620 | /* Map assigning declarations their resolutions. */ | |
39c8aaa4 | 621 | hash_map<tree, ld_plugin_symbol_resolution> * GTY((skip)) resolution_map; |
db847fa8 JJ |
622 | |
623 | /* Mode translation table. */ | |
624 | const unsigned char *mode_table; | |
88614dfa ML |
625 | |
626 | /* Read LTO section. */ | |
627 | lto_section lto_section_header; | |
3c56d8d8 ML |
628 | |
629 | int order_base; | |
b74d8dc4 JH |
630 | |
631 | int unit_base; | |
d7f09764 DN |
632 | }; |
633 | ||
a9429e29 LB |
634 | typedef struct lto_file_decl_data *lto_file_decl_data_ptr; |
635 | ||
d7f09764 DN |
636 | struct lto_char_ptr_base |
637 | { | |
638 | char *ptr; | |
639 | }; | |
640 | ||
641 | /* An incore byte stream to buffer the various parts of the function. | |
642 | The entire structure should be zeroed when created. The record | |
643 | consists of a set of blocks. The first sizeof (ptr) bytes are used | |
644 | as a chain, and the rest store the bytes to be written. */ | |
645 | struct lto_output_stream | |
646 | { | |
647 | /* The pointer to the first block in the stream. */ | |
648 | struct lto_char_ptr_base * first_block; | |
649 | ||
650 | /* The pointer to the last and current block in the stream. */ | |
651 | struct lto_char_ptr_base * current_block; | |
652 | ||
653 | /* The pointer to where the next char should be written. */ | |
654 | char * current_pointer; | |
655 | ||
656 | /* The number of characters left in the current block. */ | |
657 | unsigned int left_in_block; | |
658 | ||
659 | /* The block size of the last block allocated. */ | |
660 | unsigned int block_size; | |
661 | ||
662 | /* The total number of characters written. */ | |
663 | unsigned int total_size; | |
664 | }; | |
665 | ||
d7f09764 DN |
666 | /* A simple output block. This can be used for simple IPA passes that |
667 | do not need more than one stream. */ | |
668 | struct lto_simple_output_block | |
669 | { | |
670 | enum lto_section_type section_type; | |
671 | struct lto_out_decl_state *decl_state; | |
672 | ||
673 | /* The stream that the main tree codes are written to. */ | |
674 | struct lto_output_stream *main_stream; | |
675 | }; | |
676 | ||
4a8fb1a1 LC |
677 | /* String hashing. */ |
678 | ||
679 | struct string_slot | |
680 | { | |
681 | const char *s; | |
682 | int len; | |
683 | unsigned int slot_num; | |
684 | }; | |
685 | ||
686 | /* Hashtable helpers. */ | |
687 | ||
8d67ee55 | 688 | struct string_slot_hasher : nofree_ptr_hash <string_slot> |
4a8fb1a1 | 689 | { |
67f58944 TS |
690 | static inline hashval_t hash (const string_slot *); |
691 | static inline bool equal (const string_slot *, const string_slot *); | |
4a8fb1a1 LC |
692 | }; |
693 | ||
694 | /* Returns a hash code for DS. Adapted from libiberty's htab_hash_string | |
695 | to support strings that may not end in '\0'. */ | |
696 | ||
697 | inline hashval_t | |
67f58944 | 698 | string_slot_hasher::hash (const string_slot *ds) |
4a8fb1a1 LC |
699 | { |
700 | hashval_t r = ds->len; | |
701 | int i; | |
702 | ||
703 | for (i = 0; i < ds->len; i++) | |
704 | r = r * 67 + (unsigned)ds->s[i] - 113; | |
705 | return r; | |
706 | } | |
707 | ||
708 | /* Returns nonzero if DS1 and DS2 are equal. */ | |
709 | ||
710 | inline bool | |
67f58944 | 711 | string_slot_hasher::equal (const string_slot *ds1, const string_slot *ds2) |
4a8fb1a1 LC |
712 | { |
713 | if (ds1->len == ds2->len) | |
714 | return memcmp (ds1->s, ds2->s, ds1->len) == 0; | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
d7f09764 DN |
719 | /* Data structure holding all the data and descriptors used when writing |
720 | an LTO file. */ | |
721 | struct output_block | |
722 | { | |
723 | enum lto_section_type section_type; | |
724 | struct lto_out_decl_state *decl_state; | |
725 | ||
726 | /* The stream that the main tree codes are written to. */ | |
727 | struct lto_output_stream *main_stream; | |
728 | ||
729 | /* The stream that contains the string table. */ | |
730 | struct lto_output_stream *string_stream; | |
731 | ||
732 | /* The stream that contains the cfg. */ | |
733 | struct lto_output_stream *cfg_stream; | |
734 | ||
735 | /* The hash table that contains the set of strings we have seen so | |
736 | far and the indexes assigned to them. */ | |
c203e8a7 | 737 | hash_table<string_slot_hasher> *string_hash_table; |
d7f09764 | 738 | |
0b83e688 | 739 | /* The current symbol that we are currently serializing. Null |
d7f09764 | 740 | if we are serializing something else. */ |
f473c082 | 741 | symtab_node *symbol; |
d7f09764 DN |
742 | |
743 | /* These are the last file and line that were seen in the stream. | |
744 | If the current node differs from these, it needs to insert | |
745 | something into the stream and fix these up. */ | |
746 | const char *current_file; | |
747 | int current_line; | |
748 | int current_col; | |
6c1bc27c | 749 | bool current_sysp; |
d7f09764 | 750 | |
d7f09764 | 751 | /* Cache of nodes written in this section. */ |
412288f1 | 752 | struct streamer_tree_cache_d *writer_cache; |
fac009a8 JH |
753 | |
754 | /* All data persistent across whole duration of output block | |
755 | can go here. */ | |
756 | struct obstack obstack; | |
d7f09764 DN |
757 | }; |
758 | ||
759 | ||
760 | /* Data and descriptors used when reading from an LTO file. */ | |
6c1dae73 | 761 | class data_in |
d7f09764 | 762 | { |
6c1dae73 | 763 | public: |
d7f09764 DN |
764 | /* The global decls and types. */ |
765 | struct lto_file_decl_data *file_data; | |
766 | ||
d7f09764 DN |
767 | /* The string table. */ |
768 | const char *strings; | |
769 | ||
770 | /* The length of the string table. */ | |
771 | unsigned int strings_len; | |
772 | ||
d7f09764 | 773 | /* Maps each reference number to the resolution done by the linker. */ |
9771b263 | 774 | vec<ld_plugin_symbol_resolution_t> globals_resolution; |
d7f09764 DN |
775 | |
776 | /* Cache of pickled nodes. */ | |
412288f1 | 777 | struct streamer_tree_cache_d *reader_cache; |
eaeec5ec JH |
778 | |
779 | /* Cache of source code location. */ | |
780 | lto_location_cache location_cache; | |
d7f09764 DN |
781 | }; |
782 | ||
783 | ||
784 | /* In lto-section-in.c */ | |
99b1c316 | 785 | extern class lto_input_block * lto_create_simple_input_block ( |
b8698a0f | 786 | struct lto_file_decl_data *, |
d7f09764 DN |
787 | enum lto_section_type, const char **, size_t *); |
788 | extern void | |
b8698a0f | 789 | lto_destroy_simple_input_block (struct lto_file_decl_data *, |
d7f09764 | 790 | enum lto_section_type, |
99b1c316 | 791 | class lto_input_block *, const char *, size_t); |
b8698a0f | 792 | extern void lto_set_in_hooks (struct lto_file_decl_data **, |
d7f09764 DN |
793 | lto_get_section_data_f *, |
794 | lto_free_section_data_f *); | |
795 | extern struct lto_file_decl_data **lto_get_file_decl_data (void); | |
796 | extern const char *lto_get_section_data (struct lto_file_decl_data *, | |
797 | enum lto_section_type, | |
3c56d8d8 | 798 | const char *, int, size_t *, |
ca834876 | 799 | bool decompress = false); |
3c56d8d8 ML |
800 | extern const char *lto_get_summary_section_data (struct lto_file_decl_data *, |
801 | enum lto_section_type, | |
802 | size_t *); | |
ca834876 JH |
803 | extern const char *lto_get_raw_section_data (struct lto_file_decl_data *, |
804 | enum lto_section_type, | |
3c56d8d8 | 805 | const char *, int, size_t *); |
d7f09764 | 806 | extern void lto_free_section_data (struct lto_file_decl_data *, |
ca834876 JH |
807 | enum lto_section_type, |
808 | const char *, const char *, size_t, | |
809 | bool decompress = false); | |
810 | extern void lto_free_raw_section_data (struct lto_file_decl_data *, | |
811 | enum lto_section_type, | |
812 | const char *, const char *, size_t); | |
d7f09764 DN |
813 | extern htab_t lto_create_renaming_table (void); |
814 | extern void lto_record_renamed_decl (struct lto_file_decl_data *, | |
815 | const char *, const char *); | |
816 | extern const char *lto_get_decl_name_mapping (struct lto_file_decl_data *, | |
817 | const char *); | |
818 | extern struct lto_in_decl_state *lto_new_in_decl_state (void); | |
819 | extern void lto_delete_in_decl_state (struct lto_in_decl_state *); | |
d7f09764 DN |
820 | extern struct lto_in_decl_state *lto_get_function_in_decl_state ( |
821 | struct lto_file_decl_data *, tree); | |
82e9d642 | 822 | extern void lto_free_function_in_decl_state (struct lto_in_decl_state *); |
5e20cdc9 | 823 | extern void lto_free_function_in_decl_state_for_node (symtab_node *); |
99b1c316 | 824 | extern void lto_section_overrun (class lto_input_block *) ATTRIBUTE_NORETURN; |
f242c0a5 JH |
825 | extern void lto_value_range_error (const char *, |
826 | HOST_WIDE_INT, HOST_WIDE_INT, | |
827 | HOST_WIDE_INT) ATTRIBUTE_NORETURN; | |
d7f09764 DN |
828 | |
829 | /* In lto-section-out.c */ | |
d7f09764 DN |
830 | extern void lto_begin_section (const char *, bool); |
831 | extern void lto_end_section (void); | |
f6bcdb5e | 832 | extern void lto_write_data (const void *, unsigned int); |
ca834876 | 833 | extern void lto_write_raw_data (const void *, unsigned int); |
d7f09764 | 834 | extern void lto_write_stream (struct lto_output_stream *); |
d7f09764 DN |
835 | extern bool lto_output_decl_index (struct lto_output_stream *, |
836 | struct lto_tree_ref_encoder *, | |
837 | tree, unsigned int *); | |
838 | extern void lto_output_field_decl_index (struct lto_out_decl_state *, | |
839 | struct lto_output_stream *, tree); | |
840 | extern void lto_output_fn_decl_index (struct lto_out_decl_state *, | |
841 | struct lto_output_stream *, tree); | |
842 | extern void lto_output_namespace_decl_index (struct lto_out_decl_state *, | |
843 | struct lto_output_stream *, tree); | |
844 | extern void lto_output_var_decl_index (struct lto_out_decl_state *, | |
845 | struct lto_output_stream *, tree); | |
846 | extern void lto_output_type_decl_index (struct lto_out_decl_state *, | |
847 | struct lto_output_stream *, tree); | |
848 | extern void lto_output_type_ref_index (struct lto_out_decl_state *, | |
849 | struct lto_output_stream *, tree); | |
850 | extern struct lto_simple_output_block *lto_create_simple_output_block ( | |
851 | enum lto_section_type); | |
852 | extern void lto_destroy_simple_output_block (struct lto_simple_output_block *); | |
853 | extern struct lto_out_decl_state *lto_new_out_decl_state (void); | |
854 | extern void lto_delete_out_decl_state (struct lto_out_decl_state *); | |
855 | extern struct lto_out_decl_state *lto_get_out_decl_state (void); | |
856 | extern void lto_push_out_decl_state (struct lto_out_decl_state *); | |
857 | extern struct lto_out_decl_state *lto_pop_out_decl_state (void); | |
858 | extern void lto_record_function_out_decl_state (tree, | |
859 | struct lto_out_decl_state *); | |
bc0fe8cb | 860 | extern void lto_append_block (struct lto_output_stream *); |
d7f09764 DN |
861 | |
862 | ||
863 | /* In lto-streamer.c. */ | |
1b34e6e2 BS |
864 | |
865 | /* Set when streaming LTO for offloading compiler. */ | |
866 | extern bool lto_stream_offload_p; | |
867 | ||
d7f09764 | 868 | extern const char *lto_tag_name (enum LTO_tags); |
3c56d8d8 ML |
869 | extern char *lto_get_section_name (int, const char *, int, |
870 | struct lto_file_decl_data *); | |
b8f4e58f | 871 | extern void print_lto_report (const char *); |
d7f09764 DN |
872 | extern void lto_streamer_init (void); |
873 | extern bool gate_lto_out (void); | |
b898d037 | 874 | extern void lto_check_version (int, int, const char *); |
47c79d56 | 875 | extern void lto_streamer_hooks_init (void); |
d7f09764 DN |
876 | |
877 | /* In lto-streamer-in.c */ | |
d7f09764 | 878 | extern void lto_input_cgraph (struct lto_file_decl_data *, const char *); |
47c79d56 | 879 | extern void lto_reader_init (void); |
c38ee9a2 | 880 | extern void lto_free_file_name_hash (void); |
5e581212 JH |
881 | extern void lto_input_function_body (struct lto_file_decl_data *, |
882 | struct cgraph_node *, | |
d7f09764 | 883 | const char *); |
0b83e688 JH |
884 | extern void lto_input_variable_constructor (struct lto_file_decl_data *, |
885 | struct varpool_node *, | |
886 | const char *); | |
d7f09764 DN |
887 | extern void lto_input_constructors_and_inits (struct lto_file_decl_data *, |
888 | const char *); | |
398f05da | 889 | extern void lto_input_toplevel_asms (struct lto_file_decl_data *, int); |
db847fa8 | 890 | extern void lto_input_mode_table (struct lto_file_decl_data *); |
99b1c316 | 891 | extern class data_in *lto_data_in_create (struct lto_file_decl_data *, |
d7f09764 | 892 | const char *, unsigned, |
9771b263 | 893 | vec<ld_plugin_symbol_resolution_t> ); |
99b1c316 MS |
894 | extern void lto_data_in_delete (class data_in *); |
895 | extern void lto_input_data_block (class lto_input_block *, void *, size_t); | |
896 | void lto_input_location (location_t *, struct bitpack_d *, class data_in *); | |
eaeec5ec | 897 | location_t stream_input_location_now (struct bitpack_d *bp, |
99b1c316 MS |
898 | class data_in *data); |
899 | tree lto_input_tree_ref (class lto_input_block *, class data_in *, | |
f0efc7aa DN |
900 | struct function *, enum LTO_tags); |
901 | void lto_tag_check_set (enum LTO_tags, int, ...); | |
902 | void lto_init_eh (void); | |
99b1c316 | 903 | hashval_t lto_input_scc (class lto_input_block *, class data_in *, |
ee03e71d | 904 | unsigned *, unsigned *); |
99b1c316 | 905 | tree lto_input_tree_1 (class lto_input_block *, class data_in *, |
ee03e71d | 906 | enum LTO_tags, hashval_t hash); |
99b1c316 | 907 | tree lto_input_tree (class lto_input_block *, class data_in *); |
d7f09764 DN |
908 | |
909 | ||
910 | /* In lto-streamer-out.c */ | |
911 | extern void lto_register_decl_definition (tree, struct lto_file_decl_data *); | |
912 | extern struct output_block *create_output_block (enum lto_section_type); | |
913 | extern void destroy_output_block (struct output_block *); | |
7e54c608 | 914 | extern void lto_output_tree (struct output_block *, tree, bool, bool); |
49f836ba | 915 | extern void lto_output_toplevel_asms (void); |
fb3f88cc | 916 | extern void produce_asm (struct output_block *ob, tree fn); |
38f4f02f BS |
917 | extern void lto_output (); |
918 | extern void produce_asm_for_decls (); | |
a183b5c7 DN |
919 | void lto_output_decl_state_streams (struct output_block *, |
920 | struct lto_out_decl_state *); | |
921 | void lto_output_decl_state_refs (struct output_block *, | |
922 | struct lto_output_stream *, | |
923 | struct lto_out_decl_state *); | |
7cb7d208 | 924 | void lto_output_location (struct output_block *, struct bitpack_d *, location_t); |
db847fa8 | 925 | void lto_output_init_mode_table (void); |
1fcf52a6 | 926 | void lto_prepare_function_for_streaming (cgraph_node *); |
d7f09764 DN |
927 | |
928 | ||
929 | /* In lto-cgraph.c */ | |
9cf7975d | 930 | extern bool asm_nodes_output; |
e75f8f79 | 931 | lto_symtab_encoder_t lto_symtab_encoder_new (bool); |
5e20cdc9 | 932 | int lto_symtab_encoder_encode (lto_symtab_encoder_t, symtab_node *); |
7380e6ef | 933 | void lto_symtab_encoder_delete (lto_symtab_encoder_t); |
5e20cdc9 | 934 | bool lto_symtab_encoder_delete_node (lto_symtab_encoder_t, symtab_node *); |
7380e6ef | 935 | bool lto_symtab_encoder_encode_body_p (lto_symtab_encoder_t, |
91fbf0c7 | 936 | struct cgraph_node *); |
f27c1867 | 937 | bool lto_symtab_encoder_in_partition_p (lto_symtab_encoder_t, |
5e20cdc9 | 938 | symtab_node *); |
f27c1867 | 939 | void lto_set_symtab_encoder_in_partition (lto_symtab_encoder_t, |
5e20cdc9 | 940 | symtab_node *); |
91fbf0c7 | 941 | |
7380e6ef | 942 | bool lto_symtab_encoder_encode_initializer_p (lto_symtab_encoder_t, |
2c8326a5 | 943 | varpool_node *); |
f27c1867 | 944 | void output_symtab (void); |
ab96cc5b | 945 | void input_symtab (void); |
ec6fe917 | 946 | void output_offload_tables (void); |
ed5d948d | 947 | void input_offload_tables (bool); |
369451ec | 948 | bool referenced_from_other_partition_p (struct ipa_ref_list *, |
f27c1867 | 949 | lto_symtab_encoder_t); |
9a809897 | 950 | bool reachable_from_other_partition_p (struct cgraph_node *, |
f27c1867 | 951 | lto_symtab_encoder_t); |
f473c082 | 952 | bool referenced_from_this_partition_p (symtab_node *, |
f27c1867 | 953 | lto_symtab_encoder_t); |
f3380641 | 954 | bool reachable_from_this_partition_p (struct cgraph_node *, |
f27c1867 | 955 | lto_symtab_encoder_t); |
b4661bfe | 956 | lto_symtab_encoder_t compute_ltrans_boundary (lto_symtab_encoder_t encoder); |
837bac8c | 957 | void select_what_to_stream (void); |
d7f09764 | 958 | |
325fe981 JH |
959 | /* In options-save.c. */ |
960 | void cl_target_option_stream_out (struct output_block *, struct bitpack_d *, | |
961 | struct cl_target_option *); | |
962 | ||
99b1c316 | 963 | void cl_target_option_stream_in (class data_in *, |
325fe981 JH |
964 | struct bitpack_d *, |
965 | struct cl_target_option *); | |
966 | ||
c518c102 ML |
967 | void cl_optimization_stream_out (struct output_block *, |
968 | struct bitpack_d *, struct cl_optimization *); | |
ca9a04da | 969 | |
99b1c316 | 970 | void cl_optimization_stream_in (class data_in *, |
c518c102 | 971 | struct bitpack_d *, struct cl_optimization *); |
ca9a04da | 972 | |
d7f09764 | 973 | |
d7f09764 DN |
974 | |
975 | /* In lto-opts.c. */ | |
d7f09764 | 976 | extern void lto_write_options (void); |
d7f09764 DN |
977 | |
978 | ||
d7f09764 DN |
979 | /* Statistics gathered during LTO, WPA and LTRANS. */ |
980 | extern struct lto_stats_d lto_stats; | |
981 | ||
982 | /* Section names corresponding to the values of enum lto_section_type. */ | |
983 | extern const char *lto_section_name[]; | |
984 | ||
985 | /* Holds all the out decl states of functions output so far in the | |
986 | current output file. */ | |
9771b263 | 987 | extern vec<lto_out_decl_state_ptr> lto_function_decl_states; |
d7f09764 DN |
988 | |
989 | /* Return true if LTO tag TAG corresponds to a tree code. */ | |
990 | static inline bool | |
991 | lto_tag_is_tree_code_p (enum LTO_tags tag) | |
992 | { | |
15d16c8a | 993 | return tag > LTO_tree_pickle_reference && (unsigned) tag <= MAX_TREE_CODES; |
d7f09764 DN |
994 | } |
995 | ||
996 | ||
997 | /* Return true if LTO tag TAG corresponds to a gimple code. */ | |
998 | static inline bool | |
999 | lto_tag_is_gimple_code_p (enum LTO_tags tag) | |
1000 | { | |
15d16c8a RB |
1001 | return (unsigned) tag >= NUM_TREE_CODES + 2 |
1002 | && (unsigned) tag < 2 + NUM_TREE_CODES + LAST_AND_UNUSED_GIMPLE_CODE; | |
d7f09764 DN |
1003 | } |
1004 | ||
1005 | ||
1006 | /* Return the LTO tag corresponding to gimple code CODE. See enum | |
1007 | LTO_tags for details on the conversion. */ | |
1008 | static inline enum LTO_tags | |
1009 | lto_gimple_code_to_tag (enum gimple_code code) | |
1010 | { | |
15d16c8a | 1011 | return (enum LTO_tags) ((unsigned) code + NUM_TREE_CODES + 2); |
d7f09764 DN |
1012 | } |
1013 | ||
1014 | ||
1015 | /* Return the GIMPLE code corresponding to TAG. See enum LTO_tags for | |
1016 | details on the conversion. */ | |
1017 | static inline enum gimple_code | |
1018 | lto_tag_to_gimple_code (enum LTO_tags tag) | |
1019 | { | |
1020 | gcc_assert (lto_tag_is_gimple_code_p (tag)); | |
15d16c8a | 1021 | return (enum gimple_code) ((unsigned) tag - NUM_TREE_CODES - 2); |
d7f09764 DN |
1022 | } |
1023 | ||
1024 | ||
1025 | /* Return the LTO tag corresponding to tree code CODE. See enum | |
1026 | LTO_tags for details on the conversion. */ | |
1027 | static inline enum LTO_tags | |
1028 | lto_tree_code_to_tag (enum tree_code code) | |
1029 | { | |
15d16c8a | 1030 | return (enum LTO_tags) ((unsigned) code + 2); |
d7f09764 DN |
1031 | } |
1032 | ||
1033 | ||
1034 | /* Return the tree code corresponding to TAG. See enum LTO_tags for | |
1035 | details on the conversion. */ | |
1036 | static inline enum tree_code | |
1037 | lto_tag_to_tree_code (enum LTO_tags tag) | |
1038 | { | |
1039 | gcc_assert (lto_tag_is_tree_code_p (tag)); | |
15d16c8a | 1040 | return (enum tree_code) ((unsigned) tag - 2); |
d7f09764 DN |
1041 | } |
1042 | ||
f0efc7aa DN |
1043 | /* Check that tag ACTUAL == EXPECTED. */ |
1044 | static inline void | |
1045 | lto_tag_check (enum LTO_tags actual, enum LTO_tags expected) | |
1046 | { | |
1047 | if (actual != expected) | |
1048 | internal_error ("bytecode stream: expected tag %s instead of %s", | |
1049 | lto_tag_name (expected), lto_tag_name (actual)); | |
1050 | } | |
1051 | ||
1052 | /* Check that tag ACTUAL is in the range [TAG1, TAG2]. */ | |
1053 | static inline void | |
1054 | lto_tag_check_range (enum LTO_tags actual, enum LTO_tags tag1, | |
1055 | enum LTO_tags tag2) | |
1056 | { | |
1057 | if (actual < tag1 || actual > tag2) | |
1058 | internal_error ("bytecode stream: tag %s is not in the expected range " | |
1059 | "[%s, %s]", | |
1060 | lto_tag_name (actual), | |
1061 | lto_tag_name (tag1), | |
1062 | lto_tag_name (tag2)); | |
1063 | } | |
1064 | ||
d7f09764 DN |
1065 | /* Initialize an lto_out_decl_buffer ENCODER. */ |
1066 | static inline void | |
d579fcda | 1067 | lto_init_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) |
d7f09764 | 1068 | { |
1eb68d2d | 1069 | encoder->tree_hash_table = new hash_map<tree, unsigned> (251); |
9771b263 | 1070 | encoder->trees.create (0); |
d7f09764 DN |
1071 | } |
1072 | ||
1073 | ||
073a8998 | 1074 | /* Destroy an lto_tree_ref_encoder ENCODER by freeing its contents. The |
d7f09764 DN |
1075 | memory used by ENCODER is not freed by this function. */ |
1076 | static inline void | |
1077 | lto_destroy_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) | |
1078 | { | |
1079 | /* Hash table may be delete already. */ | |
1eb68d2d TS |
1080 | delete encoder->tree_hash_table; |
1081 | encoder->tree_hash_table = NULL; | |
9771b263 | 1082 | encoder->trees.release (); |
d7f09764 DN |
1083 | } |
1084 | ||
1085 | /* Return the number of trees encoded in ENCODER. */ | |
1086 | static inline unsigned int | |
1087 | lto_tree_ref_encoder_size (struct lto_tree_ref_encoder *encoder) | |
1088 | { | |
9771b263 | 1089 | return encoder->trees.length (); |
d7f09764 DN |
1090 | } |
1091 | ||
1092 | /* Return the IDX-th tree in ENCODER. */ | |
1093 | static inline tree | |
1094 | lto_tree_ref_encoder_get_tree (struct lto_tree_ref_encoder *encoder, | |
1095 | unsigned int idx) | |
1096 | { | |
9771b263 | 1097 | return encoder->trees[idx]; |
d7f09764 DN |
1098 | } |
1099 | ||
f27c1867 JH |
1100 | /* Return number of encoded nodes in ENCODER. */ |
1101 | static inline int | |
1102 | lto_symtab_encoder_size (lto_symtab_encoder_t encoder) | |
1103 | { | |
9771b263 | 1104 | return encoder->nodes.length (); |
7b99cca4 JH |
1105 | } |
1106 | ||
1107 | /* Value used to represent failure of lto_symtab_encoder_lookup. */ | |
1108 | #define LCC_NOT_FOUND (-1) | |
1109 | ||
1110 | /* Look up NODE in encoder. Return NODE's reference if it has been encoded | |
1111 | or LCC_NOT_FOUND if it is not there. */ | |
1112 | ||
1113 | static inline int | |
1114 | lto_symtab_encoder_lookup (lto_symtab_encoder_t encoder, | |
5e20cdc9 | 1115 | symtab_node *node) |
7b99cca4 | 1116 | { |
b787e7a2 TS |
1117 | size_t *slot = encoder->map->get (node); |
1118 | return (slot && *slot ? *(slot) - 1 : LCC_NOT_FOUND); | |
f27c1867 JH |
1119 | } |
1120 | ||
1121 | /* Return true if iterator LSE points to nothing. */ | |
1122 | static inline bool | |
1123 | lsei_end_p (lto_symtab_encoder_iterator lsei) | |
1124 | { | |
1125 | return lsei.index >= (unsigned)lto_symtab_encoder_size (lsei.encoder); | |
1126 | } | |
1127 | ||
1128 | /* Advance iterator LSE. */ | |
1129 | static inline void | |
1130 | lsei_next (lto_symtab_encoder_iterator *lsei) | |
1131 | { | |
1132 | lsei->index++; | |
1133 | } | |
1134 | ||
1135 | /* Return the node pointed to by LSI. */ | |
5e20cdc9 | 1136 | static inline symtab_node * |
f27c1867 JH |
1137 | lsei_node (lto_symtab_encoder_iterator lsei) |
1138 | { | |
9771b263 | 1139 | return lsei.encoder->nodes[lsei.index].node; |
f27c1867 JH |
1140 | } |
1141 | ||
1142 | /* Return the node pointed to by LSI. */ | |
1143 | static inline struct cgraph_node * | |
1144 | lsei_cgraph_node (lto_symtab_encoder_iterator lsei) | |
1145 | { | |
d52f5295 | 1146 | return dyn_cast<cgraph_node *> (lsei.encoder->nodes[lsei.index].node); |
f27c1867 JH |
1147 | } |
1148 | ||
1149 | /* Return the node pointed to by LSI. */ | |
2c8326a5 | 1150 | static inline varpool_node * |
f27c1867 JH |
1151 | lsei_varpool_node (lto_symtab_encoder_iterator lsei) |
1152 | { | |
d52f5295 | 1153 | return dyn_cast<varpool_node *> (lsei.encoder->nodes[lsei.index].node); |
f27c1867 JH |
1154 | } |
1155 | ||
f27c1867 JH |
1156 | /* Return the cgraph node corresponding to REF using ENCODER. */ |
1157 | ||
5e20cdc9 | 1158 | static inline symtab_node * |
f27c1867 JH |
1159 | lto_symtab_encoder_deref (lto_symtab_encoder_t encoder, int ref) |
1160 | { | |
1161 | if (ref == LCC_NOT_FOUND) | |
1162 | return NULL; | |
1163 | ||
9771b263 | 1164 | return encoder->nodes[ref].node; |
f27c1867 JH |
1165 | } |
1166 | ||
1167 | /* Return an iterator to the first node in LSI. */ | |
1168 | static inline lto_symtab_encoder_iterator | |
1169 | lsei_start (lto_symtab_encoder_t encoder) | |
1170 | { | |
1171 | lto_symtab_encoder_iterator lsei; | |
1172 | ||
1173 | lsei.encoder = encoder; | |
1174 | lsei.index = 0; | |
1175 | return lsei; | |
1176 | } | |
1177 | ||
1178 | /* Advance iterator LSE. */ | |
1179 | static inline void | |
1180 | lsei_next_in_partition (lto_symtab_encoder_iterator *lsei) | |
1181 | { | |
1182 | lsei_next (lsei); | |
1183 | while (!lsei_end_p (*lsei) | |
1184 | && !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei))) | |
1185 | lsei_next (lsei); | |
1186 | } | |
1187 | ||
1188 | /* Return an iterator to the first node in LSI. */ | |
1189 | static inline lto_symtab_encoder_iterator | |
1190 | lsei_start_in_partition (lto_symtab_encoder_t encoder) | |
1191 | { | |
1192 | lto_symtab_encoder_iterator lsei = lsei_start (encoder); | |
1193 | ||
1194 | if (lsei_end_p (lsei)) | |
1195 | return lsei; | |
1196 | if (!lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) | |
1197 | lsei_next_in_partition (&lsei); | |
1198 | ||
1199 | return lsei; | |
1200 | } | |
1201 | ||
1202 | /* Advance iterator LSE. */ | |
1203 | static inline void | |
1204 | lsei_next_function_in_partition (lto_symtab_encoder_iterator *lsei) | |
1205 | { | |
1206 | lsei_next (lsei); | |
1207 | while (!lsei_end_p (*lsei) | |
7de90a6c | 1208 | && (!is_a <cgraph_node *> (lsei_node (*lsei)) |
f27c1867 JH |
1209 | || !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei)))) |
1210 | lsei_next (lsei); | |
1211 | } | |
1212 | ||
1213 | /* Return an iterator to the first node in LSI. */ | |
1214 | static inline lto_symtab_encoder_iterator | |
1215 | lsei_start_function_in_partition (lto_symtab_encoder_t encoder) | |
1216 | { | |
1217 | lto_symtab_encoder_iterator lsei = lsei_start (encoder); | |
1218 | ||
1219 | if (lsei_end_p (lsei)) | |
1220 | return lsei; | |
7de90a6c | 1221 | if (!is_a <cgraph_node *> (lsei_node (lsei)) |
f27c1867 JH |
1222 | || !lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) |
1223 | lsei_next_function_in_partition (&lsei); | |
1224 | ||
1225 | return lsei; | |
1226 | } | |
1227 | ||
1228 | /* Advance iterator LSE. */ | |
1229 | static inline void | |
1230 | lsei_next_variable_in_partition (lto_symtab_encoder_iterator *lsei) | |
1231 | { | |
1232 | lsei_next (lsei); | |
1233 | while (!lsei_end_p (*lsei) | |
7de90a6c | 1234 | && (!is_a <varpool_node *> (lsei_node (*lsei)) |
f27c1867 JH |
1235 | || !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei)))) |
1236 | lsei_next (lsei); | |
1237 | } | |
1238 | ||
1239 | /* Return an iterator to the first node in LSI. */ | |
1240 | static inline lto_symtab_encoder_iterator | |
1241 | lsei_start_variable_in_partition (lto_symtab_encoder_t encoder) | |
1242 | { | |
1243 | lto_symtab_encoder_iterator lsei = lsei_start (encoder); | |
1244 | ||
1245 | if (lsei_end_p (lsei)) | |
1246 | return lsei; | |
7de90a6c | 1247 | if (!is_a <varpool_node *> (lsei_node (lsei)) |
f27c1867 JH |
1248 | || !lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) |
1249 | lsei_next_variable_in_partition (&lsei); | |
1250 | ||
1251 | return lsei; | |
1252 | } | |
1253 | ||
d7f09764 DN |
1254 | DEFINE_DECL_STREAM_FUNCS (TYPE, type) |
1255 | DEFINE_DECL_STREAM_FUNCS (FIELD_DECL, field_decl) | |
1256 | DEFINE_DECL_STREAM_FUNCS (FN_DECL, fn_decl) | |
1257 | DEFINE_DECL_STREAM_FUNCS (VAR_DECL, var_decl) | |
1258 | DEFINE_DECL_STREAM_FUNCS (TYPE_DECL, type_decl) | |
1259 | DEFINE_DECL_STREAM_FUNCS (NAMESPACE_DECL, namespace_decl) | |
1260 | DEFINE_DECL_STREAM_FUNCS (LABEL_DECL, label_decl) | |
1261 | ||
1ea85365 RB |
1262 | /* Entry for the delayed registering of decl -> DIE references. */ |
1263 | struct dref_entry { | |
1264 | tree decl; | |
1265 | const char *sym; | |
1266 | unsigned HOST_WIDE_INT off; | |
1267 | }; | |
1268 | ||
1269 | extern vec<dref_entry> dref_queue; | |
1270 | ||
b4da704c | 1271 | extern FILE *streamer_dump_file; |
1ea85365 | 1272 | |
d7f09764 | 1273 | #endif /* GCC_LTO_STREAMER_H */ |