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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 | ||
a746f952 JH |
128 | /* Stream additional data to LTO object files to make it easier to debug |
129 | streaming code. This changes object files. */ | |
130 | static const bool streamer_debugging = false; | |
d7f09764 | 131 | |
d7f09764 DN |
132 | /* Tags representing the various IL objects written to the bytecode file |
133 | (GIMPLE statements, basic blocks, EH regions, tree nodes, etc). | |
134 | ||
135 | NOTE, when adding new LTO tags, also update lto_tag_name. */ | |
b8698a0f | 136 | enum LTO_tags |
d7f09764 DN |
137 | { |
138 | LTO_null = 0, | |
139 | ||
dda71670 | 140 | /* Reference to previously-streamed node. */ |
15d16c8a RB |
141 | LTO_tree_pickle_reference, |
142 | ||
dda71670 JH |
143 | /* References to indexable tree nodes. These objects are stored in |
144 | tables that are written separately from the function bodies | |
145 | and variable constructors that reference them. This way they can be | |
146 | instantiated even when the referencing functions aren't (e.g., during WPA) | |
147 | and it also allows functions to be copied from one file to another without | |
148 | having to unpickle the body first (the references are location | |
149 | independent). */ | |
150 | LTO_global_stream_ref, | |
d7f09764 | 151 | |
dda71670 | 152 | LTO_ssa_name_ref, |
d7f09764 | 153 | |
dda71670 JH |
154 | /* Special for global streamer. A blob of unnamed tree nodes. */ |
155 | LTO_tree_scc, | |
d7f09764 | 156 | |
dda71670 JH |
157 | /* Sequence of trees. */ |
158 | LTO_trees, | |
159 | ||
160 | /* Shared INTEGER_CST node. */ | |
161 | LTO_integer_cst, | |
162 | ||
163 | /* Tags of trees are encoded as | |
164 | LTO_first_tree_tag + TREE_CODE. */ | |
165 | LTO_first_tree_tag, | |
166 | /* Tags of gimple typles are encoded as | |
167 | LTO_first_gimple_tag + gimple_code. */ | |
168 | LTO_first_gimple_tag = LTO_first_tree_tag + MAX_TREE_CODES, | |
169 | ||
170 | /* Entry and exit basic blocks. */ | |
171 | LTO_bb0 = LTO_first_gimple_tag + LAST_AND_UNUSED_GIMPLE_CODE, | |
d7f09764 DN |
172 | LTO_bb1, |
173 | ||
174 | /* EH region holding the previous statement. */ | |
175 | LTO_eh_region, | |
176 | ||
d7f09764 DN |
177 | /* Function body. */ |
178 | LTO_function, | |
179 | ||
180 | /* EH table. */ | |
181 | LTO_eh_table, | |
182 | ||
183 | /* EH region types. These mirror enum eh_region_type. */ | |
184 | LTO_ert_cleanup, | |
185 | LTO_ert_try, | |
186 | LTO_ert_allowed_exceptions, | |
187 | LTO_ert_must_not_throw, | |
188 | ||
189 | /* EH landing pad. */ | |
190 | LTO_eh_landing_pad, | |
191 | ||
192 | /* EH try/catch node. */ | |
193 | LTO_eh_catch, | |
194 | ||
d7f09764 DN |
195 | /* This tag must always be last. */ |
196 | LTO_NUM_TAGS | |
197 | }; | |
198 | ||
199 | ||
200 | /* Set of section types that are in an LTO file. This list will grow | |
201 | as the number of IPA passes grows since each IPA pass will need its | |
202 | own section type to store its summary information. | |
203 | ||
204 | When adding a new section type, you must also extend the | |
205 | LTO_SECTION_NAME array in lto-section-in.c. */ | |
206 | enum lto_section_type | |
207 | { | |
208 | LTO_section_decls = 0, | |
209 | LTO_section_function_body, | |
210 | LTO_section_static_initializer, | |
ab96cc5b | 211 | LTO_section_symtab, |
c8429c2a | 212 | LTO_section_symtab_extension, |
369451ec | 213 | LTO_section_refs, |
49f836ba | 214 | LTO_section_asm, |
fb3f88cc | 215 | LTO_section_jump_functions, |
d7f09764 DN |
216 | LTO_section_ipa_pure_const, |
217 | LTO_section_ipa_reference, | |
0208f7da | 218 | LTO_section_ipa_profile, |
ab96cc5b | 219 | LTO_section_symtab_nodes, |
d7f09764 | 220 | LTO_section_opts, |
922f15c2 | 221 | LTO_section_cgraph_opt_sum, |
0bceb671 | 222 | LTO_section_ipa_fn_summary, |
2c9561b5 | 223 | LTO_section_ipcp_transform, |
b84d4347 | 224 | LTO_section_ipa_icf, |
ec6fe917 | 225 | LTO_section_offload_table, |
db847fa8 | 226 | LTO_section_mode_table, |
b2b40051 | 227 | LTO_section_ipa_hsa, |
88614dfa | 228 | LTO_section_lto, |
ff6686d2 | 229 | LTO_section_ipa_sra, |
3fb68f2e | 230 | LTO_section_odr_types, |
d7f09764 DN |
231 | LTO_N_SECTION_TYPES /* Must be last. */ |
232 | }; | |
233 | ||
234 | /* Indices to the various function, type and symbol streams. */ | |
84562394 | 235 | enum lto_decl_stream_e_t |
d7f09764 | 236 | { |
ff7da2b5 | 237 | LTO_DECL_STREAM = 0, /* Must be first. */ |
d7f09764 | 238 | LTO_N_DECL_STREAMS |
84562394 | 239 | }; |
d7f09764 DN |
240 | |
241 | typedef enum ld_plugin_symbol_resolution ld_plugin_symbol_resolution_t; | |
d7f09764 | 242 | |
d7f09764 DN |
243 | /* Return a char pointer to the start of a data stream for an lto pass |
244 | or function. The first parameter is the file data that contains | |
245 | the information. The second parameter is the type of information | |
246 | to be obtained. The third parameter is the name of the function | |
b8698a0f | 247 | and is only used when finding a function body; otherwise it is |
d7f09764 | 248 | NULL. The fourth parameter is the length of the data returned. */ |
b8698a0f | 249 | typedef const char* (lto_get_section_data_f) (struct lto_file_decl_data *, |
d7f09764 | 250 | enum lto_section_type, |
b8698a0f | 251 | const char *, |
3c56d8d8 | 252 | int, |
d7f09764 DN |
253 | size_t *); |
254 | ||
255 | /* Return the data found from the above call. The first three | |
256 | parameters are the same as above. The fourth parameter is the data | |
073a8998 | 257 | itself and the fifth is the length of the data. */ |
b8698a0f | 258 | typedef void (lto_free_section_data_f) (struct lto_file_decl_data *, |
d7f09764 DN |
259 | enum lto_section_type, |
260 | const char *, | |
261 | const char *, | |
262 | size_t); | |
263 | ||
eaeec5ec | 264 | /* The location cache holds expanded locations for streamed in trees. |
e4112065 | 265 | This is done to reduce memory usage of libcpp linemap that strongly prefers |
eaeec5ec JH |
266 | locations to be inserted in the soruce order. */ |
267 | ||
268 | class lto_location_cache | |
269 | { | |
270 | public: | |
271 | /* Apply all changes in location cache. Add locations into linemap and patch | |
272 | trees. */ | |
273 | bool apply_location_cache (); | |
274 | /* Tree merging did not suceed; mark all changes in the cache as accepted. */ | |
275 | void accept_location_cache (); | |
276 | /* Tree merging did suceed; throw away recent changes. */ | |
277 | void revert_location_cache (); | |
278 | void input_location (location_t *loc, struct bitpack_d *bp, | |
99b1c316 | 279 | class data_in *data_in); |
eaeec5ec JH |
280 | lto_location_cache () |
281 | : loc_cache (), accepted_length (0), current_file (NULL), current_line (0), | |
a9dfad6d | 282 | current_col (0), current_sysp (false), current_loc (UNKNOWN_LOCATION) |
eaeec5ec JH |
283 | { |
284 | gcc_assert (!current_cache); | |
285 | current_cache = this; | |
286 | } | |
287 | ~lto_location_cache () | |
288 | { | |
289 | apply_location_cache (); | |
290 | gcc_assert (current_cache == this); | |
291 | current_cache = NULL; | |
292 | } | |
293 | ||
294 | /* There can be at most one instance of location cache (combining multiple | |
295 | would bring it out of sync with libcpp linemap); point to current | |
296 | one. */ | |
297 | static lto_location_cache *current_cache; | |
298 | ||
299 | private: | |
300 | static int cmp_loc (const void *pa, const void *pb); | |
301 | ||
302 | struct cached_location | |
303 | { | |
304 | const char *file; | |
305 | location_t *loc; | |
306 | int line, col; | |
6c1bc27c | 307 | bool sysp; |
eaeec5ec JH |
308 | }; |
309 | ||
310 | /* The location cache. */ | |
311 | ||
50cfd44e | 312 | auto_vec<cached_location> loc_cache; |
eaeec5ec JH |
313 | |
314 | /* Accepted entries are ones used by trees that are known to be not unified | |
315 | by tree merging. */ | |
316 | ||
317 | int accepted_length; | |
318 | ||
319 | /* Bookkeeping to remember state in between calls to lto_apply_location_cache | |
320 | When streaming gimple, the location cache is not used and thus | |
321 | lto_apply_location_cache happens per location basis. It is then | |
322 | useful to avoid redundant calls of linemap API. */ | |
323 | ||
324 | const char *current_file; | |
325 | int current_line; | |
326 | int current_col; | |
6c1bc27c | 327 | bool current_sysp; |
eaeec5ec JH |
328 | location_t current_loc; |
329 | }; | |
330 | ||
d7f09764 | 331 | /* Structure used as buffer for reading an LTO file. */ |
207c68cd | 332 | class lto_input_block |
d7f09764 | 333 | { |
207c68cd RB |
334 | public: |
335 | /* Special constructor for the string table, it abuses this to | |
336 | do random access but use the uhwi decoder. */ | |
db847fa8 JJ |
337 | lto_input_block (const char *data_, unsigned int p_, unsigned int len_, |
338 | const unsigned char *mode_table_) | |
339 | : data (data_), mode_table (mode_table_), p (p_), len (len_) {} | |
340 | lto_input_block (const char *data_, unsigned int len_, | |
341 | const unsigned char *mode_table_) | |
342 | : data (data_), mode_table (mode_table_), p (0), len (len_) {} | |
207c68cd | 343 | |
d7f09764 | 344 | const char *data; |
db847fa8 | 345 | const unsigned char *mode_table; |
d7f09764 DN |
346 | unsigned int p; |
347 | unsigned int len; | |
348 | }; | |
349 | ||
88614dfa | 350 | /* Compression algorithm used for compression of LTO bytecode. */ |
d7f09764 | 351 | |
88614dfa ML |
352 | enum lto_compression |
353 | { | |
354 | ZLIB, | |
355 | ZSTD | |
356 | }; | |
357 | ||
358 | /* Structure that represents LTO ELF section with information | |
359 | about the format. */ | |
360 | ||
361 | struct lto_section | |
d7f09764 DN |
362 | { |
363 | int16_t major_version; | |
364 | int16_t minor_version; | |
d1caf05a ML |
365 | unsigned char slim_object; |
366 | ||
367 | /* Flags is a private field that is not defined publicly. */ | |
368 | uint16_t flags; | |
369 | ||
370 | /* Set compression to FLAGS. */ | |
371 | inline void set_compression (lto_compression c) | |
372 | { | |
373 | flags = c; | |
374 | } | |
375 | ||
376 | /* Get compression from FLAGS. */ | |
377 | inline lto_compression get_compression () | |
378 | { | |
379 | return (lto_compression) flags; | |
380 | } | |
d7f09764 DN |
381 | }; |
382 | ||
88614dfa ML |
383 | STATIC_ASSERT (sizeof (lto_section) == 8); |
384 | ||
207c68cd RB |
385 | /* The is the first part of the record in an LTO file for many of the |
386 | IPA passes. */ | |
88614dfa | 387 | struct lto_simple_header |
d7f09764 | 388 | { |
207c68cd RB |
389 | /* Size of main gimple body of function. */ |
390 | int32_t main_size; | |
391 | }; | |
d7f09764 | 392 | |
207c68cd RB |
393 | struct lto_simple_header_with_strings : lto_simple_header |
394 | { | |
d7f09764 DN |
395 | /* Size of the string table. */ |
396 | int32_t string_size; | |
397 | }; | |
398 | ||
207c68cd RB |
399 | /* The header for a function body. */ |
400 | struct lto_function_header : lto_simple_header_with_strings | |
401 | { | |
402 | /* Size of the cfg. */ | |
403 | int32_t cfg_size; | |
404 | }; | |
405 | ||
d7f09764 DN |
406 | |
407 | /* Structure describing a symbol section. */ | |
207c68cd | 408 | struct lto_decl_header : lto_simple_header_with_strings |
d7f09764 | 409 | { |
d7f09764 DN |
410 | /* Size of region for decl state. */ |
411 | int32_t decl_state_size; | |
412 | ||
413 | /* Number of nodes in globals stream. */ | |
414 | int32_t num_nodes; | |
49f836ba JB |
415 | }; |
416 | ||
417 | ||
d7f09764 DN |
418 | /* Statistics gathered during LTO, WPA and LTRANS. */ |
419 | struct lto_stats_d | |
420 | { | |
421 | unsigned HOST_WIDE_INT num_input_cgraph_nodes; | |
7b99cca4 | 422 | unsigned HOST_WIDE_INT num_output_symtab_nodes; |
d7f09764 DN |
423 | unsigned HOST_WIDE_INT num_input_files; |
424 | unsigned HOST_WIDE_INT num_output_files; | |
425 | unsigned HOST_WIDE_INT num_cgraph_partitions; | |
426 | unsigned HOST_WIDE_INT section_size[LTO_N_SECTION_TYPES]; | |
427 | unsigned HOST_WIDE_INT num_function_bodies; | |
428 | unsigned HOST_WIDE_INT num_trees[NUM_TREE_CODES]; | |
429 | unsigned HOST_WIDE_INT num_output_il_bytes; | |
430 | unsigned HOST_WIDE_INT num_compressed_il_bytes; | |
431 | unsigned HOST_WIDE_INT num_input_il_bytes; | |
432 | unsigned HOST_WIDE_INT num_uncompressed_il_bytes; | |
ee03e71d RB |
433 | unsigned HOST_WIDE_INT num_tree_bodies_output; |
434 | unsigned HOST_WIDE_INT num_pickle_refs_output; | |
d7f09764 DN |
435 | }; |
436 | ||
7b99cca4 | 437 | /* Entry of LTO symtab encoder. */ |
84562394 | 438 | struct lto_encoder_entry |
7b99cca4 | 439 | { |
5e20cdc9 | 440 | symtab_node *node; |
7b99cca4 JH |
441 | /* Is the node in this partition (i.e. ltrans of this partition will |
442 | be responsible for outputting it)? */ | |
443 | unsigned int in_partition:1; | |
444 | /* Do we encode body in this partition? */ | |
445 | unsigned int body:1; | |
446 | /* Do we encode initializer in this partition? | |
447 | For example the readonly variable initializers are encoded to aid | |
448 | constant folding even if they are not in the partition. */ | |
449 | unsigned int initializer:1; | |
84562394 | 450 | }; |
7b99cca4 | 451 | |
7b99cca4 | 452 | |
d7f09764 | 453 | /* Encoder data structure used to stream callgraph nodes. */ |
7380e6ef | 454 | struct lto_symtab_encoder_d |
d7f09764 | 455 | { |
9771b263 | 456 | vec<lto_encoder_entry> nodes; |
b787e7a2 | 457 | hash_map<symtab_node *, size_t> *map; |
2f41ecf5 | 458 | }; |
7380e6ef JH |
459 | |
460 | typedef struct lto_symtab_encoder_d *lto_symtab_encoder_t; | |
2f41ecf5 | 461 | |
f27c1867 | 462 | /* Iterator structure for cgraph node sets. */ |
84562394 | 463 | struct lto_symtab_encoder_iterator |
703e95cf | 464 | { |
f27c1867 JH |
465 | lto_symtab_encoder_t encoder; |
466 | unsigned index; | |
84562394 | 467 | }; |
f27c1867 JH |
468 | |
469 | ||
470 | ||
d7f09764 DN |
471 | /* The lto_tree_ref_encoder struct is used to encode trees into indices. */ |
472 | ||
473 | struct lto_tree_ref_encoder | |
474 | { | |
1eb68d2d | 475 | hash_map<tree, unsigned> *tree_hash_table; /* Maps pointers to indices. */ |
d579fcda | 476 | vec<tree> trees; /* Maps indices to pointers. */ |
d7f09764 DN |
477 | }; |
478 | ||
479 | ||
480 | /* Structure to hold states of input scope. */ | |
907dadbd | 481 | struct GTY((for_user)) lto_in_decl_state |
d7f09764 DN |
482 | { |
483 | /* Array of lto_in_decl_buffers to store type and decls streams. */ | |
9c71e9df | 484 | vec<tree, va_gc> *streams[LTO_N_DECL_STREAMS]; |
d7f09764 DN |
485 | |
486 | /* If this in-decl state is associated with a function. FN_DECL | |
487 | point to the FUNCTION_DECL. */ | |
488 | tree fn_decl; | |
ca834876 JH |
489 | |
490 | /* True if decl state is compressed. */ | |
491 | bool compressed; | |
d7f09764 DN |
492 | }; |
493 | ||
494 | typedef struct lto_in_decl_state *lto_in_decl_state_ptr; | |
495 | ||
ca752f39 | 496 | struct decl_state_hasher : ggc_ptr_hash<lto_in_decl_state> |
907dadbd TS |
497 | { |
498 | static hashval_t | |
499 | hash (lto_in_decl_state *s) | |
500 | { | |
501 | return htab_hash_pointer (s->fn_decl); | |
502 | } | |
503 | ||
504 | static bool | |
505 | equal (lto_in_decl_state *a, lto_in_decl_state *b) | |
506 | { | |
507 | return a->fn_decl == b->fn_decl; | |
508 | } | |
509 | }; | |
d7f09764 DN |
510 | |
511 | /* The structure that holds all of the vectors of global types, | |
512 | decls and cgraph nodes used in the serialization of this file. */ | |
513 | struct lto_out_decl_state | |
514 | { | |
515 | /* The buffers contain the sets of decls of various kinds and types we have | |
516 | seen so far and the indexes assigned to them. */ | |
517 | struct lto_tree_ref_encoder streams[LTO_N_DECL_STREAMS]; | |
518 | ||
519 | /* Encoder for cgraph nodes. */ | |
7380e6ef | 520 | lto_symtab_encoder_t symtab_node_encoder; |
2f41ecf5 | 521 | |
d7f09764 DN |
522 | /* If this out-decl state belongs to a function, fn_decl points to that |
523 | function. Otherwise, it is NULL. */ | |
524 | tree fn_decl; | |
ca834876 JH |
525 | |
526 | /* True if decl state is compressed. */ | |
527 | bool compressed; | |
d7f09764 DN |
528 | }; |
529 | ||
530 | typedef struct lto_out_decl_state *lto_out_decl_state_ptr; | |
531 | ||
d7f09764 | 532 | |
aed7d7cf AK |
533 | /* Compact representation of a index <-> resolution pair. Unpacked to an |
534 | vector later. */ | |
535 | struct res_pair | |
536 | { | |
537 | ld_plugin_symbol_resolution_t res; | |
538 | unsigned index; | |
539 | }; | |
aed7d7cf | 540 | |
aed7d7cf | 541 | |
d7f09764 DN |
542 | /* One of these is allocated for each object file that being compiled |
543 | by lto. This structure contains the tables that are needed by the | |
544 | serialized functions and ipa passes to connect themselves to the | |
545 | global types and decls as they are reconstituted. */ | |
49ba8180 | 546 | struct GTY(()) lto_file_decl_data |
d7f09764 DN |
547 | { |
548 | /* Decl state currently used. */ | |
549 | struct lto_in_decl_state *current_decl_state; | |
550 | ||
551 | /* Decl state corresponding to regions outside of any functions | |
552 | in the compilation unit. */ | |
553 | struct lto_in_decl_state *global_decl_state; | |
554 | ||
555 | /* Table of cgraph nodes present in this file. */ | |
7380e6ef | 556 | lto_symtab_encoder_t GTY((skip)) symtab_node_encoder; |
2f41ecf5 | 557 | |
d7f09764 | 558 | /* Hash table maps lto-related section names to location in file. */ |
907dadbd | 559 | hash_table<decl_state_hasher> *function_decl_states; |
d7f09764 DN |
560 | |
561 | /* The .o file that these offsets relate to. */ | |
49ba8180 | 562 | const char *GTY((skip)) file_name; |
d7f09764 | 563 | |
d7f09764 | 564 | /* Hash table maps lto-related section names to location in file. */ |
49ba8180 | 565 | htab_t GTY((skip)) section_hash_table; |
d7f09764 DN |
566 | |
567 | /* Hash new name of renamed global declaration to its original name. */ | |
49ba8180 | 568 | htab_t GTY((skip)) renaming_hash_table; |
73ce4d1e AK |
569 | |
570 | /* Linked list used temporarily in reader */ | |
571 | struct lto_file_decl_data *next; | |
572 | ||
ebad2eee JH |
573 | /* Order in which the file appears on the command line. */ |
574 | int order; | |
575 | ||
73ce4d1e | 576 | /* Sub ID for merged objects. */ |
dde8b360 | 577 | unsigned HOST_WIDE_INT id; |
73ce4d1e AK |
578 | |
579 | /* Symbol resolutions for this file */ | |
9771b263 | 580 | vec<res_pair> GTY((skip)) respairs; |
aed7d7cf | 581 | unsigned max_index; |
db0bf14f | 582 | |
7f3577f5 | 583 | gcov_summary GTY((skip)) profile_info; |
bbf9ad07 JH |
584 | |
585 | /* Map assigning declarations their resolutions. */ | |
39c8aaa4 | 586 | hash_map<tree, ld_plugin_symbol_resolution> * GTY((skip)) resolution_map; |
db847fa8 JJ |
587 | |
588 | /* Mode translation table. */ | |
589 | const unsigned char *mode_table; | |
88614dfa ML |
590 | |
591 | /* Read LTO section. */ | |
592 | lto_section lto_section_header; | |
3c56d8d8 ML |
593 | |
594 | int order_base; | |
b74d8dc4 JH |
595 | |
596 | int unit_base; | |
d7f09764 DN |
597 | }; |
598 | ||
a9429e29 LB |
599 | typedef struct lto_file_decl_data *lto_file_decl_data_ptr; |
600 | ||
d7f09764 DN |
601 | struct lto_char_ptr_base |
602 | { | |
603 | char *ptr; | |
604 | }; | |
605 | ||
606 | /* An incore byte stream to buffer the various parts of the function. | |
607 | The entire structure should be zeroed when created. The record | |
608 | consists of a set of blocks. The first sizeof (ptr) bytes are used | |
609 | as a chain, and the rest store the bytes to be written. */ | |
610 | struct lto_output_stream | |
611 | { | |
612 | /* The pointer to the first block in the stream. */ | |
613 | struct lto_char_ptr_base * first_block; | |
614 | ||
615 | /* The pointer to the last and current block in the stream. */ | |
616 | struct lto_char_ptr_base * current_block; | |
617 | ||
618 | /* The pointer to where the next char should be written. */ | |
619 | char * current_pointer; | |
620 | ||
621 | /* The number of characters left in the current block. */ | |
622 | unsigned int left_in_block; | |
623 | ||
624 | /* The block size of the last block allocated. */ | |
625 | unsigned int block_size; | |
626 | ||
627 | /* The total number of characters written. */ | |
628 | unsigned int total_size; | |
629 | }; | |
630 | ||
d7f09764 DN |
631 | /* A simple output block. This can be used for simple IPA passes that |
632 | do not need more than one stream. */ | |
633 | struct lto_simple_output_block | |
634 | { | |
635 | enum lto_section_type section_type; | |
636 | struct lto_out_decl_state *decl_state; | |
637 | ||
638 | /* The stream that the main tree codes are written to. */ | |
639 | struct lto_output_stream *main_stream; | |
640 | }; | |
641 | ||
4a8fb1a1 LC |
642 | /* String hashing. */ |
643 | ||
644 | struct string_slot | |
645 | { | |
646 | const char *s; | |
647 | int len; | |
648 | unsigned int slot_num; | |
649 | }; | |
650 | ||
651 | /* Hashtable helpers. */ | |
652 | ||
8d67ee55 | 653 | struct string_slot_hasher : nofree_ptr_hash <string_slot> |
4a8fb1a1 | 654 | { |
67f58944 TS |
655 | static inline hashval_t hash (const string_slot *); |
656 | static inline bool equal (const string_slot *, const string_slot *); | |
4a8fb1a1 LC |
657 | }; |
658 | ||
659 | /* Returns a hash code for DS. Adapted from libiberty's htab_hash_string | |
660 | to support strings that may not end in '\0'. */ | |
661 | ||
662 | inline hashval_t | |
67f58944 | 663 | string_slot_hasher::hash (const string_slot *ds) |
4a8fb1a1 LC |
664 | { |
665 | hashval_t r = ds->len; | |
666 | int i; | |
667 | ||
668 | for (i = 0; i < ds->len; i++) | |
669 | r = r * 67 + (unsigned)ds->s[i] - 113; | |
670 | return r; | |
671 | } | |
672 | ||
673 | /* Returns nonzero if DS1 and DS2 are equal. */ | |
674 | ||
675 | inline bool | |
67f58944 | 676 | string_slot_hasher::equal (const string_slot *ds1, const string_slot *ds2) |
4a8fb1a1 LC |
677 | { |
678 | if (ds1->len == ds2->len) | |
679 | return memcmp (ds1->s, ds2->s, ds1->len) == 0; | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
d7f09764 DN |
684 | /* Data structure holding all the data and descriptors used when writing |
685 | an LTO file. */ | |
686 | struct output_block | |
687 | { | |
688 | enum lto_section_type section_type; | |
689 | struct lto_out_decl_state *decl_state; | |
690 | ||
691 | /* The stream that the main tree codes are written to. */ | |
692 | struct lto_output_stream *main_stream; | |
693 | ||
694 | /* The stream that contains the string table. */ | |
695 | struct lto_output_stream *string_stream; | |
696 | ||
697 | /* The stream that contains the cfg. */ | |
698 | struct lto_output_stream *cfg_stream; | |
699 | ||
700 | /* The hash table that contains the set of strings we have seen so | |
701 | far and the indexes assigned to them. */ | |
c203e8a7 | 702 | hash_table<string_slot_hasher> *string_hash_table; |
d7f09764 | 703 | |
0b83e688 | 704 | /* The current symbol that we are currently serializing. Null |
d7f09764 | 705 | if we are serializing something else. */ |
f473c082 | 706 | symtab_node *symbol; |
d7f09764 DN |
707 | |
708 | /* These are the last file and line that were seen in the stream. | |
709 | If the current node differs from these, it needs to insert | |
710 | something into the stream and fix these up. */ | |
711 | const char *current_file; | |
712 | int current_line; | |
713 | int current_col; | |
6c1bc27c | 714 | bool current_sysp; |
d7f09764 | 715 | |
d7f09764 | 716 | /* Cache of nodes written in this section. */ |
412288f1 | 717 | struct streamer_tree_cache_d *writer_cache; |
fac009a8 | 718 | |
03d90a20 JH |
719 | /* All trees identified as local to the unit streamed. */ |
720 | hash_set<tree> *local_trees; | |
721 | ||
fac009a8 JH |
722 | /* All data persistent across whole duration of output block |
723 | can go here. */ | |
724 | struct obstack obstack; | |
d7f09764 DN |
725 | }; |
726 | ||
727 | ||
728 | /* Data and descriptors used when reading from an LTO file. */ | |
6c1dae73 | 729 | class data_in |
d7f09764 | 730 | { |
6c1dae73 | 731 | public: |
d7f09764 DN |
732 | /* The global decls and types. */ |
733 | struct lto_file_decl_data *file_data; | |
734 | ||
d7f09764 DN |
735 | /* The string table. */ |
736 | const char *strings; | |
737 | ||
738 | /* The length of the string table. */ | |
739 | unsigned int strings_len; | |
740 | ||
d7f09764 | 741 | /* Maps each reference number to the resolution done by the linker. */ |
9771b263 | 742 | vec<ld_plugin_symbol_resolution_t> globals_resolution; |
d7f09764 DN |
743 | |
744 | /* Cache of pickled nodes. */ | |
412288f1 | 745 | struct streamer_tree_cache_d *reader_cache; |
eaeec5ec JH |
746 | |
747 | /* Cache of source code location. */ | |
748 | lto_location_cache location_cache; | |
d7f09764 DN |
749 | }; |
750 | ||
751 | ||
752 | /* In lto-section-in.c */ | |
99b1c316 | 753 | extern class lto_input_block * lto_create_simple_input_block ( |
b8698a0f | 754 | struct lto_file_decl_data *, |
d7f09764 DN |
755 | enum lto_section_type, const char **, size_t *); |
756 | extern void | |
b8698a0f | 757 | lto_destroy_simple_input_block (struct lto_file_decl_data *, |
d7f09764 | 758 | enum lto_section_type, |
99b1c316 | 759 | class lto_input_block *, const char *, size_t); |
b8698a0f | 760 | extern void lto_set_in_hooks (struct lto_file_decl_data **, |
d7f09764 DN |
761 | lto_get_section_data_f *, |
762 | lto_free_section_data_f *); | |
763 | extern struct lto_file_decl_data **lto_get_file_decl_data (void); | |
764 | extern const char *lto_get_section_data (struct lto_file_decl_data *, | |
765 | enum lto_section_type, | |
3c56d8d8 | 766 | const char *, int, size_t *, |
ca834876 | 767 | bool decompress = false); |
3c56d8d8 ML |
768 | extern const char *lto_get_summary_section_data (struct lto_file_decl_data *, |
769 | enum lto_section_type, | |
770 | size_t *); | |
ca834876 JH |
771 | extern const char *lto_get_raw_section_data (struct lto_file_decl_data *, |
772 | enum lto_section_type, | |
3c56d8d8 | 773 | const char *, int, size_t *); |
d7f09764 | 774 | extern void lto_free_section_data (struct lto_file_decl_data *, |
ca834876 JH |
775 | enum lto_section_type, |
776 | const char *, const char *, size_t, | |
777 | bool decompress = false); | |
778 | extern void lto_free_raw_section_data (struct lto_file_decl_data *, | |
779 | enum lto_section_type, | |
780 | const char *, const char *, size_t); | |
d7f09764 DN |
781 | extern htab_t lto_create_renaming_table (void); |
782 | extern void lto_record_renamed_decl (struct lto_file_decl_data *, | |
783 | const char *, const char *); | |
784 | extern const char *lto_get_decl_name_mapping (struct lto_file_decl_data *, | |
785 | const char *); | |
786 | extern struct lto_in_decl_state *lto_new_in_decl_state (void); | |
787 | extern void lto_delete_in_decl_state (struct lto_in_decl_state *); | |
d7f09764 DN |
788 | extern struct lto_in_decl_state *lto_get_function_in_decl_state ( |
789 | struct lto_file_decl_data *, tree); | |
82e9d642 | 790 | extern void lto_free_function_in_decl_state (struct lto_in_decl_state *); |
5e20cdc9 | 791 | extern void lto_free_function_in_decl_state_for_node (symtab_node *); |
99b1c316 | 792 | extern void lto_section_overrun (class lto_input_block *) ATTRIBUTE_NORETURN; |
f242c0a5 JH |
793 | extern void lto_value_range_error (const char *, |
794 | HOST_WIDE_INT, HOST_WIDE_INT, | |
795 | HOST_WIDE_INT) ATTRIBUTE_NORETURN; | |
d7f09764 DN |
796 | |
797 | /* In lto-section-out.c */ | |
d7f09764 DN |
798 | extern void lto_begin_section (const char *, bool); |
799 | extern void lto_end_section (void); | |
f6bcdb5e | 800 | extern void lto_write_data (const void *, unsigned int); |
ca834876 | 801 | extern void lto_write_raw_data (const void *, unsigned int); |
d7f09764 | 802 | extern void lto_write_stream (struct lto_output_stream *); |
d7f09764 DN |
803 | extern struct lto_simple_output_block *lto_create_simple_output_block ( |
804 | enum lto_section_type); | |
805 | extern void lto_destroy_simple_output_block (struct lto_simple_output_block *); | |
806 | extern struct lto_out_decl_state *lto_new_out_decl_state (void); | |
807 | extern void lto_delete_out_decl_state (struct lto_out_decl_state *); | |
808 | extern struct lto_out_decl_state *lto_get_out_decl_state (void); | |
809 | extern void lto_push_out_decl_state (struct lto_out_decl_state *); | |
810 | extern struct lto_out_decl_state *lto_pop_out_decl_state (void); | |
811 | extern void lto_record_function_out_decl_state (tree, | |
812 | struct lto_out_decl_state *); | |
bc0fe8cb | 813 | extern void lto_append_block (struct lto_output_stream *); |
d7f09764 DN |
814 | |
815 | ||
816 | /* In lto-streamer.c. */ | |
1b34e6e2 BS |
817 | |
818 | /* Set when streaming LTO for offloading compiler. */ | |
819 | extern bool lto_stream_offload_p; | |
820 | ||
d7f09764 | 821 | extern const char *lto_tag_name (enum LTO_tags); |
3c56d8d8 ML |
822 | extern char *lto_get_section_name (int, const char *, int, |
823 | struct lto_file_decl_data *); | |
b8f4e58f | 824 | extern void print_lto_report (const char *); |
d7f09764 DN |
825 | extern void lto_streamer_init (void); |
826 | extern bool gate_lto_out (void); | |
b898d037 | 827 | extern void lto_check_version (int, int, const char *); |
47c79d56 | 828 | extern void lto_streamer_hooks_init (void); |
d7f09764 DN |
829 | |
830 | /* In lto-streamer-in.c */ | |
d7f09764 | 831 | extern void lto_input_cgraph (struct lto_file_decl_data *, const char *); |
47c79d56 | 832 | extern void lto_reader_init (void); |
c38ee9a2 | 833 | extern void lto_free_file_name_hash (void); |
5e581212 JH |
834 | extern void lto_input_function_body (struct lto_file_decl_data *, |
835 | struct cgraph_node *, | |
d7f09764 | 836 | const char *); |
0b83e688 JH |
837 | extern void lto_input_variable_constructor (struct lto_file_decl_data *, |
838 | struct varpool_node *, | |
839 | const char *); | |
d7f09764 DN |
840 | extern void lto_input_constructors_and_inits (struct lto_file_decl_data *, |
841 | const char *); | |
398f05da | 842 | extern void lto_input_toplevel_asms (struct lto_file_decl_data *, int); |
db847fa8 | 843 | extern void lto_input_mode_table (struct lto_file_decl_data *); |
99b1c316 | 844 | extern class data_in *lto_data_in_create (struct lto_file_decl_data *, |
d7f09764 | 845 | const char *, unsigned, |
9771b263 | 846 | vec<ld_plugin_symbol_resolution_t> ); |
99b1c316 MS |
847 | extern void lto_data_in_delete (class data_in *); |
848 | extern void lto_input_data_block (class lto_input_block *, void *, size_t); | |
849 | void lto_input_location (location_t *, struct bitpack_d *, class data_in *); | |
eaeec5ec | 850 | location_t stream_input_location_now (struct bitpack_d *bp, |
99b1c316 MS |
851 | class data_in *data); |
852 | tree lto_input_tree_ref (class lto_input_block *, class data_in *, | |
f0efc7aa DN |
853 | struct function *, enum LTO_tags); |
854 | void lto_tag_check_set (enum LTO_tags, int, ...); | |
855 | void lto_init_eh (void); | |
99b1c316 | 856 | hashval_t lto_input_scc (class lto_input_block *, class data_in *, |
03d90a20 | 857 | unsigned *, unsigned *, bool); |
99b1c316 | 858 | tree lto_input_tree_1 (class lto_input_block *, class data_in *, |
ee03e71d | 859 | enum LTO_tags, hashval_t hash); |
99b1c316 | 860 | tree lto_input_tree (class lto_input_block *, class data_in *); |
33e23881 | 861 | tree stream_read_tree_ref (class lto_input_block *, class data_in *); |
d7f09764 DN |
862 | |
863 | ||
864 | /* In lto-streamer-out.c */ | |
865 | extern void lto_register_decl_definition (tree, struct lto_file_decl_data *); | |
866 | extern struct output_block *create_output_block (enum lto_section_type); | |
867 | extern void destroy_output_block (struct output_block *); | |
7e54c608 | 868 | extern void lto_output_tree (struct output_block *, tree, bool, bool); |
33e23881 | 869 | extern void stream_write_tree_ref (struct output_block *, tree); |
ff7da2b5 JH |
870 | extern void lto_output_var_decl_ref (struct lto_out_decl_state *, |
871 | struct lto_output_stream *, tree); | |
872 | extern void lto_output_fn_decl_ref (struct lto_out_decl_state *, | |
873 | struct lto_output_stream *, tree); | |
874 | extern tree lto_input_var_decl_ref (lto_input_block *, lto_file_decl_data *); | |
875 | extern tree lto_input_fn_decl_ref (lto_input_block *, lto_file_decl_data *); | |
49f836ba | 876 | extern void lto_output_toplevel_asms (void); |
fb3f88cc | 877 | extern void produce_asm (struct output_block *ob, tree fn); |
38f4f02f BS |
878 | extern void lto_output (); |
879 | extern void produce_asm_for_decls (); | |
a183b5c7 DN |
880 | void lto_output_decl_state_streams (struct output_block *, |
881 | struct lto_out_decl_state *); | |
882 | void lto_output_decl_state_refs (struct output_block *, | |
883 | struct lto_output_stream *, | |
884 | struct lto_out_decl_state *); | |
7cb7d208 | 885 | void lto_output_location (struct output_block *, struct bitpack_d *, location_t); |
db847fa8 | 886 | void lto_output_init_mode_table (void); |
1fcf52a6 | 887 | void lto_prepare_function_for_streaming (cgraph_node *); |
d7f09764 DN |
888 | |
889 | ||
890 | /* In lto-cgraph.c */ | |
9cf7975d | 891 | extern bool asm_nodes_output; |
e75f8f79 | 892 | lto_symtab_encoder_t lto_symtab_encoder_new (bool); |
5e20cdc9 | 893 | int lto_symtab_encoder_encode (lto_symtab_encoder_t, symtab_node *); |
7380e6ef | 894 | void lto_symtab_encoder_delete (lto_symtab_encoder_t); |
5e20cdc9 | 895 | bool lto_symtab_encoder_delete_node (lto_symtab_encoder_t, symtab_node *); |
7380e6ef | 896 | bool lto_symtab_encoder_encode_body_p (lto_symtab_encoder_t, |
91fbf0c7 | 897 | struct cgraph_node *); |
f27c1867 | 898 | bool lto_symtab_encoder_in_partition_p (lto_symtab_encoder_t, |
5e20cdc9 | 899 | symtab_node *); |
f27c1867 | 900 | void lto_set_symtab_encoder_in_partition (lto_symtab_encoder_t, |
5e20cdc9 | 901 | symtab_node *); |
91fbf0c7 | 902 | |
7380e6ef | 903 | bool lto_symtab_encoder_encode_initializer_p (lto_symtab_encoder_t, |
2c8326a5 | 904 | varpool_node *); |
f27c1867 | 905 | void output_symtab (void); |
ab96cc5b | 906 | void input_symtab (void); |
ec6fe917 | 907 | void output_offload_tables (void); |
ed5d948d | 908 | void input_offload_tables (bool); |
369451ec | 909 | bool referenced_from_other_partition_p (struct ipa_ref_list *, |
f27c1867 | 910 | lto_symtab_encoder_t); |
9a809897 | 911 | bool reachable_from_other_partition_p (struct cgraph_node *, |
f27c1867 | 912 | lto_symtab_encoder_t); |
f473c082 | 913 | bool referenced_from_this_partition_p (symtab_node *, |
f27c1867 | 914 | lto_symtab_encoder_t); |
f3380641 | 915 | bool reachable_from_this_partition_p (struct cgraph_node *, |
f27c1867 | 916 | lto_symtab_encoder_t); |
b4661bfe | 917 | lto_symtab_encoder_t compute_ltrans_boundary (lto_symtab_encoder_t encoder); |
837bac8c | 918 | void select_what_to_stream (void); |
d7f09764 | 919 | |
325fe981 JH |
920 | /* In options-save.c. */ |
921 | void cl_target_option_stream_out (struct output_block *, struct bitpack_d *, | |
922 | struct cl_target_option *); | |
923 | ||
99b1c316 | 924 | void cl_target_option_stream_in (class data_in *, |
325fe981 JH |
925 | struct bitpack_d *, |
926 | struct cl_target_option *); | |
927 | ||
c518c102 ML |
928 | void cl_optimization_stream_out (struct output_block *, |
929 | struct bitpack_d *, struct cl_optimization *); | |
ca9a04da | 930 | |
99b1c316 | 931 | void cl_optimization_stream_in (class data_in *, |
c518c102 | 932 | struct bitpack_d *, struct cl_optimization *); |
ca9a04da | 933 | |
d7f09764 | 934 | |
d7f09764 DN |
935 | |
936 | /* In lto-opts.c. */ | |
d7f09764 | 937 | extern void lto_write_options (void); |
d7f09764 DN |
938 | |
939 | ||
d7f09764 DN |
940 | /* Statistics gathered during LTO, WPA and LTRANS. */ |
941 | extern struct lto_stats_d lto_stats; | |
942 | ||
943 | /* Section names corresponding to the values of enum lto_section_type. */ | |
944 | extern const char *lto_section_name[]; | |
945 | ||
946 | /* Holds all the out decl states of functions output so far in the | |
947 | current output file. */ | |
9771b263 | 948 | extern vec<lto_out_decl_state_ptr> lto_function_decl_states; |
d7f09764 DN |
949 | |
950 | /* Return true if LTO tag TAG corresponds to a tree code. */ | |
951 | static inline bool | |
952 | lto_tag_is_tree_code_p (enum LTO_tags tag) | |
953 | { | |
dda71670 | 954 | return tag > LTO_first_tree_tag && (unsigned) tag <= MAX_TREE_CODES; |
d7f09764 DN |
955 | } |
956 | ||
957 | ||
958 | /* Return true if LTO tag TAG corresponds to a gimple code. */ | |
959 | static inline bool | |
960 | lto_tag_is_gimple_code_p (enum LTO_tags tag) | |
961 | { | |
dda71670 JH |
962 | return (unsigned) tag >= LTO_first_gimple_tag |
963 | && (unsigned) tag | |
964 | < LTO_first_gimple_tag + LAST_AND_UNUSED_GIMPLE_CODE; | |
d7f09764 DN |
965 | } |
966 | ||
967 | ||
968 | /* Return the LTO tag corresponding to gimple code CODE. See enum | |
969 | LTO_tags for details on the conversion. */ | |
970 | static inline enum LTO_tags | |
971 | lto_gimple_code_to_tag (enum gimple_code code) | |
972 | { | |
dda71670 | 973 | return (enum LTO_tags) ((unsigned) code + LTO_first_gimple_tag); |
d7f09764 DN |
974 | } |
975 | ||
976 | ||
977 | /* Return the GIMPLE code corresponding to TAG. See enum LTO_tags for | |
978 | details on the conversion. */ | |
979 | static inline enum gimple_code | |
980 | lto_tag_to_gimple_code (enum LTO_tags tag) | |
981 | { | |
982 | gcc_assert (lto_tag_is_gimple_code_p (tag)); | |
dda71670 | 983 | return (enum gimple_code) ((unsigned) tag - LTO_first_gimple_tag); |
d7f09764 DN |
984 | } |
985 | ||
986 | ||
987 | /* Return the LTO tag corresponding to tree code CODE. See enum | |
988 | LTO_tags for details on the conversion. */ | |
989 | static inline enum LTO_tags | |
990 | lto_tree_code_to_tag (enum tree_code code) | |
991 | { | |
dda71670 | 992 | return (enum LTO_tags) ((unsigned) code + LTO_first_tree_tag); |
d7f09764 DN |
993 | } |
994 | ||
995 | ||
996 | /* Return the tree code corresponding to TAG. See enum LTO_tags for | |
997 | details on the conversion. */ | |
998 | static inline enum tree_code | |
999 | lto_tag_to_tree_code (enum LTO_tags tag) | |
1000 | { | |
1001 | gcc_assert (lto_tag_is_tree_code_p (tag)); | |
dda71670 | 1002 | return (enum tree_code) ((unsigned) tag - LTO_first_tree_tag); |
d7f09764 DN |
1003 | } |
1004 | ||
f0efc7aa DN |
1005 | /* Check that tag ACTUAL == EXPECTED. */ |
1006 | static inline void | |
1007 | lto_tag_check (enum LTO_tags actual, enum LTO_tags expected) | |
1008 | { | |
1009 | if (actual != expected) | |
1010 | internal_error ("bytecode stream: expected tag %s instead of %s", | |
1011 | lto_tag_name (expected), lto_tag_name (actual)); | |
1012 | } | |
1013 | ||
1014 | /* Check that tag ACTUAL is in the range [TAG1, TAG2]. */ | |
1015 | static inline void | |
1016 | lto_tag_check_range (enum LTO_tags actual, enum LTO_tags tag1, | |
1017 | enum LTO_tags tag2) | |
1018 | { | |
1019 | if (actual < tag1 || actual > tag2) | |
1020 | internal_error ("bytecode stream: tag %s is not in the expected range " | |
1021 | "[%s, %s]", | |
1022 | lto_tag_name (actual), | |
1023 | lto_tag_name (tag1), | |
1024 | lto_tag_name (tag2)); | |
1025 | } | |
1026 | ||
d7f09764 DN |
1027 | /* Initialize an lto_out_decl_buffer ENCODER. */ |
1028 | static inline void | |
d579fcda | 1029 | lto_init_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) |
d7f09764 | 1030 | { |
1eb68d2d | 1031 | encoder->tree_hash_table = new hash_map<tree, unsigned> (251); |
9771b263 | 1032 | encoder->trees.create (0); |
d7f09764 DN |
1033 | } |
1034 | ||
1035 | ||
073a8998 | 1036 | /* Destroy an lto_tree_ref_encoder ENCODER by freeing its contents. The |
d7f09764 DN |
1037 | memory used by ENCODER is not freed by this function. */ |
1038 | static inline void | |
1039 | lto_destroy_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) | |
1040 | { | |
1041 | /* Hash table may be delete already. */ | |
1eb68d2d TS |
1042 | delete encoder->tree_hash_table; |
1043 | encoder->tree_hash_table = NULL; | |
9771b263 | 1044 | encoder->trees.release (); |
d7f09764 DN |
1045 | } |
1046 | ||
1047 | /* Return the number of trees encoded in ENCODER. */ | |
1048 | static inline unsigned int | |
1049 | lto_tree_ref_encoder_size (struct lto_tree_ref_encoder *encoder) | |
1050 | { | |
9771b263 | 1051 | return encoder->trees.length (); |
d7f09764 DN |
1052 | } |
1053 | ||
1054 | /* Return the IDX-th tree in ENCODER. */ | |
1055 | static inline tree | |
1056 | lto_tree_ref_encoder_get_tree (struct lto_tree_ref_encoder *encoder, | |
1057 | unsigned int idx) | |
1058 | { | |
9771b263 | 1059 | return encoder->trees[idx]; |
d7f09764 DN |
1060 | } |
1061 | ||
f27c1867 JH |
1062 | /* Return number of encoded nodes in ENCODER. */ |
1063 | static inline int | |
1064 | lto_symtab_encoder_size (lto_symtab_encoder_t encoder) | |
1065 | { | |
9771b263 | 1066 | return encoder->nodes.length (); |
7b99cca4 JH |
1067 | } |
1068 | ||
1069 | /* Value used to represent failure of lto_symtab_encoder_lookup. */ | |
1070 | #define LCC_NOT_FOUND (-1) | |
1071 | ||
1072 | /* Look up NODE in encoder. Return NODE's reference if it has been encoded | |
1073 | or LCC_NOT_FOUND if it is not there. */ | |
1074 | ||
1075 | static inline int | |
1076 | lto_symtab_encoder_lookup (lto_symtab_encoder_t encoder, | |
5e20cdc9 | 1077 | symtab_node *node) |
7b99cca4 | 1078 | { |
b787e7a2 TS |
1079 | size_t *slot = encoder->map->get (node); |
1080 | return (slot && *slot ? *(slot) - 1 : LCC_NOT_FOUND); | |
f27c1867 JH |
1081 | } |
1082 | ||
1083 | /* Return true if iterator LSE points to nothing. */ | |
1084 | static inline bool | |
1085 | lsei_end_p (lto_symtab_encoder_iterator lsei) | |
1086 | { | |
1087 | return lsei.index >= (unsigned)lto_symtab_encoder_size (lsei.encoder); | |
1088 | } | |
1089 | ||
1090 | /* Advance iterator LSE. */ | |
1091 | static inline void | |
1092 | lsei_next (lto_symtab_encoder_iterator *lsei) | |
1093 | { | |
1094 | lsei->index++; | |
1095 | } | |
1096 | ||
1097 | /* Return the node pointed to by LSI. */ | |
5e20cdc9 | 1098 | static inline symtab_node * |
f27c1867 JH |
1099 | lsei_node (lto_symtab_encoder_iterator lsei) |
1100 | { | |
9771b263 | 1101 | return lsei.encoder->nodes[lsei.index].node; |
f27c1867 JH |
1102 | } |
1103 | ||
1104 | /* Return the node pointed to by LSI. */ | |
1105 | static inline struct cgraph_node * | |
1106 | lsei_cgraph_node (lto_symtab_encoder_iterator lsei) | |
1107 | { | |
d52f5295 | 1108 | return dyn_cast<cgraph_node *> (lsei.encoder->nodes[lsei.index].node); |
f27c1867 JH |
1109 | } |
1110 | ||
1111 | /* Return the node pointed to by LSI. */ | |
2c8326a5 | 1112 | static inline varpool_node * |
f27c1867 JH |
1113 | lsei_varpool_node (lto_symtab_encoder_iterator lsei) |
1114 | { | |
d52f5295 | 1115 | return dyn_cast<varpool_node *> (lsei.encoder->nodes[lsei.index].node); |
f27c1867 JH |
1116 | } |
1117 | ||
f27c1867 JH |
1118 | /* Return the cgraph node corresponding to REF using ENCODER. */ |
1119 | ||
5e20cdc9 | 1120 | static inline symtab_node * |
f27c1867 JH |
1121 | lto_symtab_encoder_deref (lto_symtab_encoder_t encoder, int ref) |
1122 | { | |
1123 | if (ref == LCC_NOT_FOUND) | |
1124 | return NULL; | |
1125 | ||
9771b263 | 1126 | return encoder->nodes[ref].node; |
f27c1867 JH |
1127 | } |
1128 | ||
1129 | /* Return an iterator to the first node in LSI. */ | |
1130 | static inline lto_symtab_encoder_iterator | |
1131 | lsei_start (lto_symtab_encoder_t encoder) | |
1132 | { | |
1133 | lto_symtab_encoder_iterator lsei; | |
1134 | ||
1135 | lsei.encoder = encoder; | |
1136 | lsei.index = 0; | |
1137 | return lsei; | |
1138 | } | |
1139 | ||
1140 | /* Advance iterator LSE. */ | |
1141 | static inline void | |
1142 | lsei_next_in_partition (lto_symtab_encoder_iterator *lsei) | |
1143 | { | |
1144 | lsei_next (lsei); | |
1145 | while (!lsei_end_p (*lsei) | |
1146 | && !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei))) | |
1147 | lsei_next (lsei); | |
1148 | } | |
1149 | ||
1150 | /* Return an iterator to the first node in LSI. */ | |
1151 | static inline lto_symtab_encoder_iterator | |
1152 | lsei_start_in_partition (lto_symtab_encoder_t encoder) | |
1153 | { | |
1154 | lto_symtab_encoder_iterator lsei = lsei_start (encoder); | |
1155 | ||
1156 | if (lsei_end_p (lsei)) | |
1157 | return lsei; | |
1158 | if (!lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) | |
1159 | lsei_next_in_partition (&lsei); | |
1160 | ||
1161 | return lsei; | |
1162 | } | |
1163 | ||
1164 | /* Advance iterator LSE. */ | |
1165 | static inline void | |
1166 | lsei_next_function_in_partition (lto_symtab_encoder_iterator *lsei) | |
1167 | { | |
1168 | lsei_next (lsei); | |
1169 | while (!lsei_end_p (*lsei) | |
7de90a6c | 1170 | && (!is_a <cgraph_node *> (lsei_node (*lsei)) |
f27c1867 JH |
1171 | || !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei)))) |
1172 | lsei_next (lsei); | |
1173 | } | |
1174 | ||
1175 | /* Return an iterator to the first node in LSI. */ | |
1176 | static inline lto_symtab_encoder_iterator | |
1177 | lsei_start_function_in_partition (lto_symtab_encoder_t encoder) | |
1178 | { | |
1179 | lto_symtab_encoder_iterator lsei = lsei_start (encoder); | |
1180 | ||
1181 | if (lsei_end_p (lsei)) | |
1182 | return lsei; | |
7de90a6c | 1183 | if (!is_a <cgraph_node *> (lsei_node (lsei)) |
f27c1867 JH |
1184 | || !lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) |
1185 | lsei_next_function_in_partition (&lsei); | |
1186 | ||
1187 | return lsei; | |
1188 | } | |
1189 | ||
1190 | /* Advance iterator LSE. */ | |
1191 | static inline void | |
1192 | lsei_next_variable_in_partition (lto_symtab_encoder_iterator *lsei) | |
1193 | { | |
1194 | lsei_next (lsei); | |
1195 | while (!lsei_end_p (*lsei) | |
7de90a6c | 1196 | && (!is_a <varpool_node *> (lsei_node (*lsei)) |
f27c1867 JH |
1197 | || !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei)))) |
1198 | lsei_next (lsei); | |
1199 | } | |
1200 | ||
1201 | /* Return an iterator to the first node in LSI. */ | |
1202 | static inline lto_symtab_encoder_iterator | |
1203 | lsei_start_variable_in_partition (lto_symtab_encoder_t encoder) | |
1204 | { | |
1205 | lto_symtab_encoder_iterator lsei = lsei_start (encoder); | |
1206 | ||
1207 | if (lsei_end_p (lsei)) | |
1208 | return lsei; | |
7de90a6c | 1209 | if (!is_a <varpool_node *> (lsei_node (lsei)) |
f27c1867 JH |
1210 | || !lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) |
1211 | lsei_next_variable_in_partition (&lsei); | |
1212 | ||
1213 | return lsei; | |
1214 | } | |
1215 | ||
1ea85365 RB |
1216 | /* Entry for the delayed registering of decl -> DIE references. */ |
1217 | struct dref_entry { | |
1218 | tree decl; | |
1219 | const char *sym; | |
1220 | unsigned HOST_WIDE_INT off; | |
1221 | }; | |
1222 | ||
1223 | extern vec<dref_entry> dref_queue; | |
1224 | ||
b4da704c | 1225 | extern FILE *streamer_dump_file; |
1ea85365 | 1226 | |
d7f09764 | 1227 | #endif /* GCC_LTO_STREAMER_H */ |