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d7f09764 DN |
1 | /* Data structures and declarations used for reading and writing |
2 | GIMPLE to a file stream. | |
3 | ||
c75c517d | 4 | Copyright (C) 2009, 2010 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" | |
27 | #include "tree.h" | |
28 | #include "gimple.h" | |
29 | #include "target.h" | |
30 | #include "cgraph.h" | |
31 | #include "vec.h" | |
32 | #include "vecprim.h" | |
5c4f225f | 33 | #include "alloc-pool.h" |
d7f09764 DN |
34 | |
35 | /* Define when debugging the LTO streamer. This causes the writer | |
36 | to output the numeric value for the memory address of the tree node | |
37 | being emitted. When debugging a problem in the reader, check the | |
38 | original address that the writer was emitting using lto_orig_address_get. | |
39 | With this value, set a breakpoint in the writer (e.g., lto_output_tree) | |
40 | to trace how the faulty node is being emitted. */ | |
41 | /* #define LTO_STREAMER_DEBUG 1 */ | |
42 | ||
43 | /* The encoding for a function consists of the following sections: | |
44 | ||
45 | 1) The header. | |
46 | 2) FIELD_DECLS. | |
47 | 3) FUNCTION_DECLS. | |
48 | 4) global VAR_DECLS. | |
49 | 5) type_decls | |
50 | 6) types. | |
51 | 7) Names for the labels that have names | |
52 | 8) The SSA names. | |
53 | 9) The control flow graph. | |
54 | 10-11)Gimple for local decls. | |
55 | 12) Gimple for the function. | |
56 | 13) Strings. | |
57 | ||
58 | 1) THE HEADER. | |
59 | 2-6) THE GLOBAL DECLS AND TYPES. | |
60 | ||
61 | The global decls and types are encoded in the same way. For each | |
62 | entry, there is word with the offset within the section to the | |
63 | entry. | |
64 | ||
b8698a0f | 65 | 7) THE LABEL NAMES. |
d7f09764 DN |
66 | |
67 | Since most labels do not have names, this section my be of zero | |
68 | length. It consists of an array of string table references, one | |
69 | per label. In the lto code, the labels are given either | |
70 | positive or negative indexes. the positive ones have names and | |
71 | the negative ones do not. The positive index can be used to | |
72 | find the name in this array. | |
73 | ||
b8698a0f | 74 | 9) THE CFG. |
d7f09764 DN |
75 | |
76 | 10) Index into the local decls. Since local decls can have local | |
77 | decls inside them, they must be read in randomly in order to | |
b8698a0f | 78 | properly restore them. |
d7f09764 DN |
79 | |
80 | 11-12) GIMPLE FOR THE LOCAL DECLS AND THE FUNCTION BODY. | |
81 | ||
82 | The gimple consists of a set of records. | |
83 | ||
84 | THE FUNCTION | |
b8698a0f | 85 | |
d7f09764 DN |
86 | At the top level of (8) is the function. It consists of five |
87 | pieces: | |
88 | ||
89 | LTO_function - The tag. | |
90 | eh tree - This is all of the exception handling regions | |
91 | put out in a post order traversial of the | |
92 | tree. Siblings are output as lists terminated | |
93 | by a 0. The set of fields matches the fields | |
94 | defined in except.c. | |
95 | ||
96 | last_basic_block - in uleb128 form. | |
97 | ||
98 | basic blocks - This is the set of basic blocks. | |
99 | ||
100 | zero - The termination of the basic blocks. | |
101 | ||
102 | BASIC BLOCKS | |
103 | ||
104 | There are two forms of basic blocks depending on if they are | |
105 | empty or not. | |
106 | ||
107 | The basic block consists of: | |
108 | ||
109 | LTO_bb1 or LTO_bb0 - The tag. | |
110 | ||
111 | bb->index - the index in uleb128 form. | |
112 | ||
113 | #succs - The number of successors un uleb128 form. | |
114 | ||
115 | the successors - For each edge, a pair. The first of the | |
116 | pair is the index of the successor in | |
117 | uleb128 form and the second are the flags in | |
118 | uleb128 form. | |
119 | ||
120 | the statements - A gimple tree, as described above. | |
121 | These are only present for LTO_BB1. | |
122 | Following each statement is an optional | |
123 | exception handling record LTO_eh_region | |
124 | which contains the region number (for | |
125 | regions >= 0). | |
126 | ||
127 | zero - This is only present for LTO_BB1 and is used | |
128 | to terminate the statements and exception | |
129 | regions within this block. | |
130 | ||
131 | 12) STRINGS | |
132 | ||
133 | String are represented in the table as pairs, a length in ULEB128 | |
134 | form followed by the data for the string. */ | |
135 | ||
136 | /* The string that is the prefix on the section names we make for lto. | |
137 | For decls the DECL_ASSEMBLER_NAME is appended to make the section | |
138 | name for the functions and static_initializers. For other types of | |
139 | sections a '.' and the section type are appended. */ | |
140 | #define LTO_SECTION_NAME_PREFIX ".gnu.lto_" | |
141 | ||
142 | #define LTO_major_version 1 | |
143 | #define LTO_minor_version 0 | |
144 | ||
145 | typedef unsigned char lto_decl_flags_t; | |
146 | ||
147 | ||
148 | /* Data structures used to pack values and bitflags into a vector of | |
149 | words. Used to stream values of a fixed number of bits in a space | |
150 | efficient way. */ | |
151 | static unsigned const BITS_PER_BITPACK_WORD = HOST_BITS_PER_WIDE_INT; | |
152 | ||
153 | typedef unsigned HOST_WIDE_INT bitpack_word_t; | |
154 | DEF_VEC_I(bitpack_word_t); | |
155 | DEF_VEC_ALLOC_I(bitpack_word_t, heap); | |
156 | ||
157 | struct bitpack_d | |
158 | { | |
2465dcc2 RG |
159 | /* The position of the first unused or unconsumed bit in the word. */ |
160 | unsigned pos; | |
d7f09764 | 161 | |
2465dcc2 RG |
162 | /* The current word we are (un)packing. */ |
163 | bitpack_word_t word; | |
d7f09764 | 164 | |
2465dcc2 RG |
165 | /* The lto_output_stream or the lto_input_block we are streaming to/from. */ |
166 | void *stream; | |
d7f09764 DN |
167 | }; |
168 | ||
169 | /* Tags representing the various IL objects written to the bytecode file | |
170 | (GIMPLE statements, basic blocks, EH regions, tree nodes, etc). | |
171 | ||
172 | NOTE, when adding new LTO tags, also update lto_tag_name. */ | |
b8698a0f | 173 | enum LTO_tags |
d7f09764 DN |
174 | { |
175 | LTO_null = 0, | |
176 | ||
177 | /* Reserve enough entries to fit all the tree and gimple codes handled | |
178 | by the streamer. This guarantees that: | |
179 | ||
180 | 1- Given a tree code C: | |
181 | enum LTO_tags tag == C + 1 | |
182 | ||
183 | 2- Given a gimple code C: | |
184 | enum LTO_tags tag == C + NUM_TREE_CODES + 1 | |
185 | ||
186 | Conversely, to map between LTO tags and tree/gimple codes, the | |
187 | reverse operation must be applied. */ | |
188 | LTO_bb0 = 1 + NUM_TREE_CODES + LAST_AND_UNUSED_GIMPLE_CODE, | |
189 | LTO_bb1, | |
190 | ||
191 | /* EH region holding the previous statement. */ | |
192 | LTO_eh_region, | |
193 | ||
194 | /* An MD or NORMAL builtin. Only the code and class are streamed out. */ | |
195 | LTO_builtin_decl, | |
196 | ||
197 | /* Function body. */ | |
198 | LTO_function, | |
199 | ||
200 | /* EH table. */ | |
201 | LTO_eh_table, | |
202 | ||
203 | /* EH region types. These mirror enum eh_region_type. */ | |
204 | LTO_ert_cleanup, | |
205 | LTO_ert_try, | |
206 | LTO_ert_allowed_exceptions, | |
207 | LTO_ert_must_not_throw, | |
208 | ||
209 | /* EH landing pad. */ | |
210 | LTO_eh_landing_pad, | |
211 | ||
212 | /* EH try/catch node. */ | |
213 | LTO_eh_catch, | |
214 | ||
215 | /* Special for global streamer. Reference to previously-streamed node. */ | |
216 | LTO_tree_pickle_reference, | |
217 | ||
218 | /* References to indexable tree nodes. These objects are stored in | |
219 | tables that are written separately from the function bodies that | |
220 | reference them. This way they can be instantiated even when the | |
221 | referencing functions aren't (e.g., during WPA) and it also allows | |
222 | functions to be copied from one file to another without having | |
223 | to unpickle the body first (the references are location | |
224 | independent). | |
225 | ||
226 | NOTE, do not regroup these values as the grouping is exposed | |
227 | in the range checks done in lto_input_tree. */ | |
228 | LTO_field_decl_ref, /* Do not change. */ | |
229 | LTO_function_decl_ref, | |
230 | LTO_label_decl_ref, | |
231 | LTO_namespace_decl_ref, | |
232 | LTO_result_decl_ref, | |
233 | LTO_ssa_name_ref, | |
234 | LTO_type_decl_ref, | |
235 | LTO_type_ref, | |
236 | LTO_const_decl_ref, | |
237 | LTO_imported_decl_ref, | |
238 | LTO_global_decl_ref, /* Do not change. */ | |
239 | ||
240 | /* This tag must always be last. */ | |
241 | LTO_NUM_TAGS | |
242 | }; | |
243 | ||
244 | ||
245 | /* Set of section types that are in an LTO file. This list will grow | |
246 | as the number of IPA passes grows since each IPA pass will need its | |
247 | own section type to store its summary information. | |
248 | ||
249 | When adding a new section type, you must also extend the | |
250 | LTO_SECTION_NAME array in lto-section-in.c. */ | |
251 | enum lto_section_type | |
252 | { | |
253 | LTO_section_decls = 0, | |
254 | LTO_section_function_body, | |
255 | LTO_section_static_initializer, | |
256 | LTO_section_cgraph, | |
2942c502 | 257 | LTO_section_varpool, |
369451ec | 258 | LTO_section_refs, |
fb3f88cc | 259 | LTO_section_jump_functions, |
d7f09764 DN |
260 | LTO_section_ipa_pure_const, |
261 | LTO_section_ipa_reference, | |
262 | LTO_section_symtab, | |
d7f09764 | 263 | LTO_section_opts, |
922f15c2 | 264 | LTO_section_cgraph_opt_sum, |
d7f09764 DN |
265 | LTO_N_SECTION_TYPES /* Must be last. */ |
266 | }; | |
267 | ||
268 | /* Indices to the various function, type and symbol streams. */ | |
269 | typedef enum | |
270 | { | |
271 | LTO_DECL_STREAM_TYPE = 0, /* Must be first. */ | |
272 | LTO_DECL_STREAM_FIELD_DECL, | |
273 | LTO_DECL_STREAM_FN_DECL, | |
274 | LTO_DECL_STREAM_VAR_DECL, | |
275 | LTO_DECL_STREAM_TYPE_DECL, | |
276 | LTO_DECL_STREAM_NAMESPACE_DECL, | |
277 | LTO_DECL_STREAM_LABEL_DECL, | |
278 | LTO_N_DECL_STREAMS | |
279 | } lto_decl_stream_e_t; | |
280 | ||
281 | typedef enum ld_plugin_symbol_resolution ld_plugin_symbol_resolution_t; | |
282 | DEF_VEC_I(ld_plugin_symbol_resolution_t); | |
283 | DEF_VEC_ALLOC_I(ld_plugin_symbol_resolution_t, heap); | |
284 | ||
285 | ||
286 | /* Macro to define convenience functions for type and decl streams | |
b8698a0f | 287 | in lto_file_decl_data. */ |
d7f09764 DN |
288 | #define DEFINE_DECL_STREAM_FUNCS(UPPER_NAME, name) \ |
289 | static inline tree \ | |
290 | lto_file_decl_data_get_ ## name (struct lto_file_decl_data *data, \ | |
291 | unsigned int idx) \ | |
292 | { \ | |
293 | struct lto_in_decl_state *state = data->current_decl_state; \ | |
294 | gcc_assert (idx < state->streams[LTO_DECL_STREAM_## UPPER_NAME].size); \ | |
295 | return state->streams[LTO_DECL_STREAM_## UPPER_NAME].trees[idx]; \ | |
296 | } \ | |
297 | \ | |
298 | static inline unsigned int \ | |
299 | lto_file_decl_data_num_ ## name ## s (struct lto_file_decl_data *data) \ | |
300 | { \ | |
301 | struct lto_in_decl_state *state = data->current_decl_state; \ | |
302 | return state->streams[LTO_DECL_STREAM_## UPPER_NAME].size; \ | |
303 | } | |
304 | ||
305 | ||
306 | /* Return a char pointer to the start of a data stream for an lto pass | |
307 | or function. The first parameter is the file data that contains | |
308 | the information. The second parameter is the type of information | |
309 | to be obtained. The third parameter is the name of the function | |
b8698a0f | 310 | and is only used when finding a function body; otherwise it is |
d7f09764 | 311 | NULL. The fourth parameter is the length of the data returned. */ |
b8698a0f | 312 | typedef const char* (lto_get_section_data_f) (struct lto_file_decl_data *, |
d7f09764 | 313 | enum lto_section_type, |
b8698a0f | 314 | const char *, |
d7f09764 DN |
315 | size_t *); |
316 | ||
317 | /* Return the data found from the above call. The first three | |
318 | parameters are the same as above. The fourth parameter is the data | |
319 | itself and the fifth is the lenght of the data. */ | |
b8698a0f | 320 | typedef void (lto_free_section_data_f) (struct lto_file_decl_data *, |
d7f09764 DN |
321 | enum lto_section_type, |
322 | const char *, | |
323 | const char *, | |
324 | size_t); | |
325 | ||
326 | /* Cache of pickled nodes. Used to avoid writing the same node more | |
327 | than once. The first time a tree node is streamed out, it is | |
328 | entered in this cache. Subsequent references to the same node are | |
329 | resolved by looking it up in this cache. | |
330 | ||
331 | This is used in two ways: | |
332 | ||
333 | - On the writing side, the first time T is added to STREAMER_CACHE, | |
334 | a new reference index is created for T and T is emitted on the | |
335 | stream. If T needs to be emitted again to the stream, instead of | |
336 | pickling it again, the reference index is emitted. | |
337 | ||
338 | - On the reading side, the first time T is read from the stream, it | |
339 | is reconstructed in memory and a new reference index created for | |
340 | T. The reconstructed T is inserted in some array so that when | |
341 | the reference index for T is found in the input stream, it can be | |
342 | used to look up into the array to get the reconstructed T. */ | |
343 | struct lto_streamer_cache_d | |
344 | { | |
345 | /* The mapping between tree nodes and slots into the nodes array. */ | |
346 | htab_t node_map; | |
347 | ||
5c4f225f JH |
348 | /* Node map to store entries into. */ |
349 | alloc_pool node_map_entries; | |
350 | ||
d7f09764 DN |
351 | /* Next available slot in the nodes and offsets arrays. */ |
352 | unsigned next_slot; | |
353 | ||
354 | /* The nodes pickled so far. */ | |
979aeb33 | 355 | VEC(tree,heap) *nodes; |
d7f09764 DN |
356 | |
357 | /* Offset into the stream where the nodes have been written. */ | |
358 | VEC(unsigned,heap) *offsets; | |
359 | }; | |
360 | ||
361 | ||
362 | /* Structure used as buffer for reading an LTO file. */ | |
b8698a0f | 363 | struct lto_input_block |
d7f09764 DN |
364 | { |
365 | const char *data; | |
366 | unsigned int p; | |
367 | unsigned int len; | |
368 | }; | |
369 | ||
370 | #define LTO_INIT_INPUT_BLOCK(BASE,D,P,L) \ | |
371 | do { \ | |
372 | BASE.data = D; \ | |
373 | BASE.p = P; \ | |
374 | BASE.len = L; \ | |
375 | } while (0) | |
376 | ||
377 | #define LTO_INIT_INPUT_BLOCK_PTR(BASE,D,P,L) \ | |
378 | do { \ | |
379 | BASE->data = D; \ | |
380 | BASE->p = P; \ | |
381 | BASE->len = L; \ | |
382 | } while (0) | |
383 | ||
384 | ||
385 | /* The is the first part of the record for a function or constructor | |
386 | in the .o file. */ | |
387 | struct lto_header | |
388 | { | |
389 | int16_t major_version; | |
390 | int16_t minor_version; | |
391 | enum lto_section_type section_type; | |
392 | }; | |
393 | ||
394 | /* The header for a function body. */ | |
395 | struct lto_function_header | |
396 | { | |
397 | /* The header for all types of sections. */ | |
398 | struct lto_header lto_header; | |
399 | ||
400 | /* Number of labels with names. */ | |
401 | int32_t num_named_labels; | |
402 | ||
403 | /* Number of labels without names. */ | |
404 | int32_t num_unnamed_labels; | |
405 | ||
406 | /* Size compressed or 0 if not compressed. */ | |
407 | int32_t compressed_size; | |
408 | ||
409 | /* Size of names for named labels. */ | |
410 | int32_t named_label_size; | |
411 | ||
412 | /* Size of the cfg. */ | |
413 | int32_t cfg_size; | |
414 | ||
415 | /* Size of main gimple body of function. */ | |
416 | int32_t main_size; | |
417 | ||
418 | /* Size of the string table. */ | |
419 | int32_t string_size; | |
420 | }; | |
421 | ||
422 | ||
423 | /* Structure describing a symbol section. */ | |
424 | struct lto_decl_header | |
425 | { | |
426 | /* The header for all types of sections. */ | |
427 | struct lto_header lto_header; | |
428 | ||
429 | /* Size of region for decl state. */ | |
430 | int32_t decl_state_size; | |
431 | ||
432 | /* Number of nodes in globals stream. */ | |
433 | int32_t num_nodes; | |
434 | ||
435 | /* Size of region for expressions, decls, types, etc. */ | |
436 | int32_t main_size; | |
437 | ||
438 | /* Size of the string table. */ | |
439 | int32_t string_size; | |
440 | }; | |
441 | ||
442 | ||
443 | /* Statistics gathered during LTO, WPA and LTRANS. */ | |
444 | struct lto_stats_d | |
445 | { | |
446 | unsigned HOST_WIDE_INT num_input_cgraph_nodes; | |
447 | unsigned HOST_WIDE_INT num_output_cgraph_nodes; | |
448 | unsigned HOST_WIDE_INT num_input_files; | |
449 | unsigned HOST_WIDE_INT num_output_files; | |
450 | unsigned HOST_WIDE_INT num_cgraph_partitions; | |
451 | unsigned HOST_WIDE_INT section_size[LTO_N_SECTION_TYPES]; | |
452 | unsigned HOST_WIDE_INT num_function_bodies; | |
453 | unsigned HOST_WIDE_INT num_trees[NUM_TREE_CODES]; | |
454 | unsigned HOST_WIDE_INT num_output_il_bytes; | |
455 | unsigned HOST_WIDE_INT num_compressed_il_bytes; | |
456 | unsigned HOST_WIDE_INT num_input_il_bytes; | |
457 | unsigned HOST_WIDE_INT num_uncompressed_il_bytes; | |
458 | }; | |
459 | ||
460 | /* Encoder data structure used to stream callgraph nodes. */ | |
461 | struct lto_cgraph_encoder_d | |
462 | { | |
463 | /* Map nodes to reference number. */ | |
464 | struct pointer_map_t *map; | |
465 | ||
466 | /* Map reference number to node. */ | |
467 | VEC(cgraph_node_ptr,heap) *nodes; | |
91fbf0c7 JH |
468 | |
469 | /* Map of nodes where we want to output body. */ | |
470 | struct pointer_set_t *body; | |
d7f09764 DN |
471 | }; |
472 | ||
473 | typedef struct lto_cgraph_encoder_d *lto_cgraph_encoder_t; | |
474 | ||
91fbf0c7 JH |
475 | /* Return number of encoded nodes in ENCODER. */ |
476 | ||
477 | static inline int | |
478 | lto_cgraph_encoder_size (lto_cgraph_encoder_t encoder) | |
479 | { | |
480 | return VEC_length (cgraph_node_ptr, encoder->nodes); | |
481 | } | |
482 | ||
483 | ||
2f41ecf5 JH |
484 | /* Encoder data structure used to stream callgraph nodes. */ |
485 | struct lto_varpool_encoder_d | |
486 | { | |
487 | /* Map nodes to reference number. */ | |
488 | struct pointer_map_t *map; | |
489 | ||
490 | /* Map reference number to node. */ | |
491 | VEC(varpool_node_ptr,heap) *nodes; | |
492 | ||
493 | /* Map of nodes where we want to output initializer. */ | |
494 | struct pointer_set_t *initializer; | |
495 | }; | |
496 | typedef struct lto_varpool_encoder_d *lto_varpool_encoder_t; | |
497 | ||
703e95cf JH |
498 | /* Return number of encoded nodes in ENCODER. */ |
499 | ||
500 | static inline int | |
501 | lto_varpool_encoder_size (lto_varpool_encoder_t encoder) | |
502 | { | |
503 | return VEC_length (varpool_node_ptr, encoder->nodes); | |
504 | } | |
505 | ||
d7f09764 | 506 | /* Mapping from indices to trees. */ |
49ba8180 | 507 | struct GTY(()) lto_tree_ref_table |
d7f09764 DN |
508 | { |
509 | /* Array of referenced trees . */ | |
49ba8180 | 510 | tree * GTY((length ("%h.size"))) trees; |
d7f09764 DN |
511 | |
512 | /* Size of array. */ | |
513 | unsigned int size; | |
514 | }; | |
515 | ||
516 | ||
517 | /* Mapping between trees and slots in an array. */ | |
518 | struct lto_decl_slot | |
519 | { | |
520 | tree t; | |
521 | int slot_num; | |
522 | }; | |
523 | ||
524 | ||
525 | /* The lto_tree_ref_encoder struct is used to encode trees into indices. */ | |
526 | ||
527 | struct lto_tree_ref_encoder | |
528 | { | |
529 | htab_t tree_hash_table; /* Maps pointers to indices. */ | |
530 | unsigned int next_index; /* Next available index. */ | |
531 | VEC(tree,heap) *trees; /* Maps indices to pointers. */ | |
532 | }; | |
533 | ||
534 | ||
535 | /* Structure to hold states of input scope. */ | |
49ba8180 | 536 | struct GTY(()) lto_in_decl_state |
d7f09764 DN |
537 | { |
538 | /* Array of lto_in_decl_buffers to store type and decls streams. */ | |
539 | struct lto_tree_ref_table streams[LTO_N_DECL_STREAMS]; | |
540 | ||
541 | /* If this in-decl state is associated with a function. FN_DECL | |
542 | point to the FUNCTION_DECL. */ | |
543 | tree fn_decl; | |
544 | }; | |
545 | ||
546 | typedef struct lto_in_decl_state *lto_in_decl_state_ptr; | |
547 | ||
548 | ||
549 | /* The structure that holds all of the vectors of global types, | |
550 | decls and cgraph nodes used in the serialization of this file. */ | |
551 | struct lto_out_decl_state | |
552 | { | |
553 | /* The buffers contain the sets of decls of various kinds and types we have | |
554 | seen so far and the indexes assigned to them. */ | |
555 | struct lto_tree_ref_encoder streams[LTO_N_DECL_STREAMS]; | |
556 | ||
557 | /* Encoder for cgraph nodes. */ | |
558 | lto_cgraph_encoder_t cgraph_node_encoder; | |
559 | ||
2f41ecf5 JH |
560 | /* Encoder for varpool nodes. */ |
561 | lto_varpool_encoder_t varpool_node_encoder; | |
562 | ||
d7f09764 DN |
563 | /* If this out-decl state belongs to a function, fn_decl points to that |
564 | function. Otherwise, it is NULL. */ | |
565 | tree fn_decl; | |
566 | }; | |
567 | ||
568 | typedef struct lto_out_decl_state *lto_out_decl_state_ptr; | |
569 | ||
570 | DEF_VEC_P(lto_out_decl_state_ptr); | |
571 | DEF_VEC_ALLOC_P(lto_out_decl_state_ptr, heap); | |
572 | ||
573 | /* One of these is allocated for each object file that being compiled | |
574 | by lto. This structure contains the tables that are needed by the | |
575 | serialized functions and ipa passes to connect themselves to the | |
576 | global types and decls as they are reconstituted. */ | |
49ba8180 | 577 | struct GTY(()) lto_file_decl_data |
d7f09764 DN |
578 | { |
579 | /* Decl state currently used. */ | |
580 | struct lto_in_decl_state *current_decl_state; | |
581 | ||
582 | /* Decl state corresponding to regions outside of any functions | |
583 | in the compilation unit. */ | |
584 | struct lto_in_decl_state *global_decl_state; | |
585 | ||
586 | /* Table of cgraph nodes present in this file. */ | |
49ba8180 | 587 | lto_cgraph_encoder_t GTY((skip)) cgraph_node_encoder; |
d7f09764 | 588 | |
2f41ecf5 JH |
589 | /* Table of varpool nodes present in this file. */ |
590 | lto_varpool_encoder_t GTY((skip)) varpool_node_encoder; | |
591 | ||
d7f09764 | 592 | /* Hash table maps lto-related section names to location in file. */ |
49ba8180 | 593 | htab_t GTY((param_is (struct lto_in_decl_state))) function_decl_states; |
d7f09764 DN |
594 | |
595 | /* The .o file that these offsets relate to. */ | |
49ba8180 | 596 | const char *GTY((skip)) file_name; |
d7f09764 | 597 | |
d7f09764 | 598 | /* Hash table maps lto-related section names to location in file. */ |
49ba8180 | 599 | htab_t GTY((skip)) section_hash_table; |
d7f09764 DN |
600 | |
601 | /* Hash new name of renamed global declaration to its original name. */ | |
49ba8180 | 602 | htab_t GTY((skip)) renaming_hash_table; |
d7f09764 DN |
603 | }; |
604 | ||
a9429e29 LB |
605 | typedef struct lto_file_decl_data *lto_file_decl_data_ptr; |
606 | ||
d7f09764 DN |
607 | struct lto_char_ptr_base |
608 | { | |
609 | char *ptr; | |
610 | }; | |
611 | ||
612 | /* An incore byte stream to buffer the various parts of the function. | |
613 | The entire structure should be zeroed when created. The record | |
614 | consists of a set of blocks. The first sizeof (ptr) bytes are used | |
615 | as a chain, and the rest store the bytes to be written. */ | |
616 | struct lto_output_stream | |
617 | { | |
618 | /* The pointer to the first block in the stream. */ | |
619 | struct lto_char_ptr_base * first_block; | |
620 | ||
621 | /* The pointer to the last and current block in the stream. */ | |
622 | struct lto_char_ptr_base * current_block; | |
623 | ||
624 | /* The pointer to where the next char should be written. */ | |
625 | char * current_pointer; | |
626 | ||
627 | /* The number of characters left in the current block. */ | |
628 | unsigned int left_in_block; | |
629 | ||
630 | /* The block size of the last block allocated. */ | |
631 | unsigned int block_size; | |
632 | ||
633 | /* The total number of characters written. */ | |
634 | unsigned int total_size; | |
635 | }; | |
636 | ||
637 | /* The is the first part of the record in an LTO file for many of the | |
638 | IPA passes. */ | |
639 | struct lto_simple_header | |
640 | { | |
641 | /* The header for all types of sections. */ | |
642 | struct lto_header lto_header; | |
643 | ||
644 | /* Size of main gimple body of function. */ | |
645 | int32_t main_size; | |
646 | ||
647 | /* Size of main stream when compressed. */ | |
648 | int32_t compressed_size; | |
649 | }; | |
650 | ||
651 | /* A simple output block. This can be used for simple IPA passes that | |
652 | do not need more than one stream. */ | |
653 | struct lto_simple_output_block | |
654 | { | |
655 | enum lto_section_type section_type; | |
656 | struct lto_out_decl_state *decl_state; | |
657 | ||
658 | /* The stream that the main tree codes are written to. */ | |
659 | struct lto_output_stream *main_stream; | |
660 | }; | |
661 | ||
662 | /* Data structure holding all the data and descriptors used when writing | |
663 | an LTO file. */ | |
664 | struct output_block | |
665 | { | |
666 | enum lto_section_type section_type; | |
667 | struct lto_out_decl_state *decl_state; | |
668 | ||
669 | /* The stream that the main tree codes are written to. */ | |
670 | struct lto_output_stream *main_stream; | |
671 | ||
672 | /* The stream that contains the string table. */ | |
673 | struct lto_output_stream *string_stream; | |
674 | ||
675 | /* The stream that contains the cfg. */ | |
676 | struct lto_output_stream *cfg_stream; | |
677 | ||
678 | /* The hash table that contains the set of strings we have seen so | |
679 | far and the indexes assigned to them. */ | |
680 | htab_t string_hash_table; | |
681 | ||
682 | /* The current cgraph_node that we are currently serializing. Null | |
683 | if we are serializing something else. */ | |
684 | struct cgraph_node *cgraph_node; | |
685 | ||
686 | /* These are the last file and line that were seen in the stream. | |
687 | If the current node differs from these, it needs to insert | |
688 | something into the stream and fix these up. */ | |
689 | const char *current_file; | |
690 | int current_line; | |
691 | int current_col; | |
692 | ||
693 | /* True if writing globals and types. */ | |
694 | bool global; | |
695 | ||
696 | /* Cache of nodes written in this section. */ | |
697 | struct lto_streamer_cache_d *writer_cache; | |
698 | }; | |
699 | ||
700 | ||
701 | /* Data and descriptors used when reading from an LTO file. */ | |
702 | struct data_in | |
703 | { | |
704 | /* The global decls and types. */ | |
705 | struct lto_file_decl_data *file_data; | |
706 | ||
707 | /* All of the labels. */ | |
708 | tree *labels; | |
709 | ||
710 | /* The string table. */ | |
711 | const char *strings; | |
712 | ||
713 | /* The length of the string table. */ | |
714 | unsigned int strings_len; | |
715 | ||
716 | /* Number of named labels. Used to find the index of unnamed labels | |
717 | since they share space with the named labels. */ | |
b8698a0f | 718 | unsigned int num_named_labels; |
d7f09764 DN |
719 | |
720 | /* Number of unnamed labels. */ | |
721 | unsigned int num_unnamed_labels; | |
722 | ||
723 | const char *current_file; | |
724 | int current_line; | |
725 | int current_col; | |
726 | ||
727 | /* Maps each reference number to the resolution done by the linker. */ | |
728 | VEC(ld_plugin_symbol_resolution_t,heap) *globals_resolution; | |
729 | ||
730 | /* Cache of pickled nodes. */ | |
731 | struct lto_streamer_cache_d *reader_cache; | |
732 | }; | |
733 | ||
734 | ||
735 | /* In lto-section-in.c */ | |
736 | extern struct lto_input_block * lto_create_simple_input_block ( | |
b8698a0f | 737 | struct lto_file_decl_data *, |
d7f09764 DN |
738 | enum lto_section_type, const char **, size_t *); |
739 | extern void | |
b8698a0f | 740 | lto_destroy_simple_input_block (struct lto_file_decl_data *, |
d7f09764 DN |
741 | enum lto_section_type, |
742 | struct lto_input_block *, const char *, size_t); | |
b8698a0f | 743 | extern void lto_set_in_hooks (struct lto_file_decl_data **, |
d7f09764 DN |
744 | lto_get_section_data_f *, |
745 | lto_free_section_data_f *); | |
746 | extern struct lto_file_decl_data **lto_get_file_decl_data (void); | |
747 | extern const char *lto_get_section_data (struct lto_file_decl_data *, | |
748 | enum lto_section_type, | |
749 | const char *, size_t *); | |
750 | extern void lto_free_section_data (struct lto_file_decl_data *, | |
751 | enum lto_section_type, | |
752 | const char *, const char *, size_t); | |
753 | extern unsigned char lto_input_1_unsigned (struct lto_input_block *); | |
754 | extern unsigned HOST_WIDE_INT lto_input_uleb128 (struct lto_input_block *); | |
755 | extern unsigned HOST_WIDEST_INT lto_input_widest_uint_uleb128 ( | |
756 | struct lto_input_block *); | |
757 | extern HOST_WIDE_INT lto_input_sleb128 (struct lto_input_block *); | |
758 | extern htab_t lto_create_renaming_table (void); | |
759 | extern void lto_record_renamed_decl (struct lto_file_decl_data *, | |
760 | const char *, const char *); | |
761 | extern const char *lto_get_decl_name_mapping (struct lto_file_decl_data *, | |
762 | const char *); | |
763 | extern struct lto_in_decl_state *lto_new_in_decl_state (void); | |
764 | extern void lto_delete_in_decl_state (struct lto_in_decl_state *); | |
765 | extern hashval_t lto_hash_in_decl_state (const void *); | |
766 | extern int lto_eq_in_decl_state (const void *, const void *); | |
767 | extern struct lto_in_decl_state *lto_get_function_in_decl_state ( | |
768 | struct lto_file_decl_data *, tree); | |
769 | ||
770 | /* In lto-section-out.c */ | |
771 | extern hashval_t lto_hash_decl_slot_node (const void *); | |
772 | extern int lto_eq_decl_slot_node (const void *, const void *); | |
773 | extern hashval_t lto_hash_type_slot_node (const void *); | |
774 | extern int lto_eq_type_slot_node (const void *, const void *); | |
775 | extern void lto_begin_section (const char *, bool); | |
776 | extern void lto_end_section (void); | |
777 | extern void lto_write_stream (struct lto_output_stream *); | |
778 | extern void lto_output_1_stream (struct lto_output_stream *, char); | |
779 | extern void lto_output_data_stream (struct lto_output_stream *, const void *, | |
780 | size_t); | |
781 | extern void lto_output_uleb128_stream (struct lto_output_stream *, | |
782 | unsigned HOST_WIDE_INT); | |
783 | extern void lto_output_widest_uint_uleb128_stream (struct lto_output_stream *, | |
784 | unsigned HOST_WIDEST_INT); | |
785 | extern void lto_output_sleb128_stream (struct lto_output_stream *, | |
786 | HOST_WIDE_INT); | |
787 | extern bool lto_output_decl_index (struct lto_output_stream *, | |
788 | struct lto_tree_ref_encoder *, | |
789 | tree, unsigned int *); | |
790 | extern void lto_output_field_decl_index (struct lto_out_decl_state *, | |
791 | struct lto_output_stream *, tree); | |
792 | extern void lto_output_fn_decl_index (struct lto_out_decl_state *, | |
793 | struct lto_output_stream *, tree); | |
794 | extern void lto_output_namespace_decl_index (struct lto_out_decl_state *, | |
795 | struct lto_output_stream *, tree); | |
796 | extern void lto_output_var_decl_index (struct lto_out_decl_state *, | |
797 | struct lto_output_stream *, tree); | |
798 | extern void lto_output_type_decl_index (struct lto_out_decl_state *, | |
799 | struct lto_output_stream *, tree); | |
800 | extern void lto_output_type_ref_index (struct lto_out_decl_state *, | |
801 | struct lto_output_stream *, tree); | |
802 | extern struct lto_simple_output_block *lto_create_simple_output_block ( | |
803 | enum lto_section_type); | |
804 | extern void lto_destroy_simple_output_block (struct lto_simple_output_block *); | |
805 | extern struct lto_out_decl_state *lto_new_out_decl_state (void); | |
806 | extern void lto_delete_out_decl_state (struct lto_out_decl_state *); | |
807 | extern struct lto_out_decl_state *lto_get_out_decl_state (void); | |
808 | extern void lto_push_out_decl_state (struct lto_out_decl_state *); | |
809 | extern struct lto_out_decl_state *lto_pop_out_decl_state (void); | |
810 | extern void lto_record_function_out_decl_state (tree, | |
811 | struct lto_out_decl_state *); | |
d7f09764 DN |
812 | |
813 | ||
814 | /* In lto-streamer.c. */ | |
815 | extern const char *lto_tag_name (enum LTO_tags); | |
816 | extern bitmap lto_bitmap_alloc (void); | |
817 | extern void lto_bitmap_free (bitmap); | |
818 | extern char *lto_get_section_name (int, const char *); | |
819 | extern void print_lto_report (void); | |
d7f09764 DN |
820 | extern bool lto_streamer_cache_insert (struct lto_streamer_cache_d *, tree, |
821 | int *, unsigned *); | |
822 | extern bool lto_streamer_cache_insert_at (struct lto_streamer_cache_d *, tree, | |
823 | int); | |
824 | extern bool lto_streamer_cache_lookup (struct lto_streamer_cache_d *, tree, | |
825 | int *); | |
826 | extern tree lto_streamer_cache_get (struct lto_streamer_cache_d *, int); | |
827 | extern struct lto_streamer_cache_d *lto_streamer_cache_create (void); | |
828 | extern void lto_streamer_cache_delete (struct lto_streamer_cache_d *); | |
829 | extern void lto_streamer_init (void); | |
830 | extern bool gate_lto_out (void); | |
831 | #ifdef LTO_STREAMER_DEBUG | |
832 | extern void lto_orig_address_map (tree, intptr_t); | |
833 | extern intptr_t lto_orig_address_get (tree); | |
834 | extern void lto_orig_address_remove (tree); | |
835 | #endif | |
836 | extern void lto_check_version (int, int); | |
837 | ||
838 | ||
839 | /* In lto-streamer-in.c */ | |
d7f09764 DN |
840 | extern void lto_input_cgraph (struct lto_file_decl_data *, const char *); |
841 | extern void lto_init_reader (void); | |
842 | extern tree lto_input_tree (struct lto_input_block *, struct data_in *); | |
843 | extern void lto_input_function_body (struct lto_file_decl_data *, tree, | |
844 | const char *); | |
845 | extern void lto_input_constructors_and_inits (struct lto_file_decl_data *, | |
846 | const char *); | |
d7f09764 DN |
847 | extern void lto_init_reader (void); |
848 | extern struct data_in *lto_data_in_create (struct lto_file_decl_data *, | |
849 | const char *, unsigned, | |
850 | VEC(ld_plugin_symbol_resolution_t,heap) *); | |
851 | extern void lto_data_in_delete (struct data_in *); | |
d7f09764 DN |
852 | |
853 | ||
854 | /* In lto-streamer-out.c */ | |
855 | extern void lto_register_decl_definition (tree, struct lto_file_decl_data *); | |
856 | extern struct output_block *create_output_block (enum lto_section_type); | |
857 | extern void destroy_output_block (struct output_block *); | |
858 | extern void lto_output_tree (struct output_block *, tree, bool); | |
fb3f88cc | 859 | extern void produce_asm (struct output_block *ob, tree fn); |
d7f09764 DN |
860 | |
861 | ||
862 | /* In lto-cgraph.c */ | |
863 | struct cgraph_node *lto_cgraph_encoder_deref (lto_cgraph_encoder_t, int); | |
864 | int lto_cgraph_encoder_lookup (lto_cgraph_encoder_t, struct cgraph_node *); | |
865 | lto_cgraph_encoder_t lto_cgraph_encoder_new (void); | |
866 | int lto_cgraph_encoder_encode (lto_cgraph_encoder_t, struct cgraph_node *); | |
2f41ecf5 | 867 | void lto_cgraph_encoder_delete (lto_cgraph_encoder_t); |
91fbf0c7 JH |
868 | bool lto_cgraph_encoder_encode_body_p (lto_cgraph_encoder_t, |
869 | struct cgraph_node *); | |
870 | ||
871 | bool lto_varpool_encoder_encode_body_p (lto_varpool_encoder_t, | |
872 | struct varpool_node *); | |
2f41ecf5 JH |
873 | struct varpool_node *lto_varpool_encoder_deref (lto_varpool_encoder_t, int); |
874 | int lto_varpool_encoder_lookup (lto_varpool_encoder_t, struct varpool_node *); | |
875 | lto_varpool_encoder_t lto_varpool_encoder_new (void); | |
876 | int lto_varpool_encoder_encode (lto_varpool_encoder_t, struct varpool_node *); | |
877 | void lto_varpool_encoder_delete (lto_varpool_encoder_t); | |
878 | bool lto_varpool_encoder_encode_initializer_p (lto_varpool_encoder_t, | |
879 | struct varpool_node *); | |
880 | void output_cgraph (cgraph_node_set, varpool_node_set); | |
d7f09764 | 881 | void input_cgraph (void); |
369451ec JH |
882 | bool referenced_from_other_partition_p (struct ipa_ref_list *, |
883 | cgraph_node_set, | |
884 | varpool_node_set vset); | |
9a809897 JH |
885 | bool reachable_from_other_partition_p (struct cgraph_node *, |
886 | cgraph_node_set); | |
f3380641 JH |
887 | bool referenced_from_this_partition_p (struct ipa_ref_list *, |
888 | cgraph_node_set, | |
889 | varpool_node_set vset); | |
890 | bool reachable_from_this_partition_p (struct cgraph_node *, | |
891 | cgraph_node_set); | |
892 | void compute_ltrans_boundary (struct lto_out_decl_state *state, | |
893 | cgraph_node_set, varpool_node_set); | |
d7f09764 DN |
894 | |
895 | ||
896 | /* In lto-symtab.c. */ | |
1a735925 RG |
897 | extern void lto_symtab_register_decl (tree, ld_plugin_symbol_resolution_t, |
898 | struct lto_file_decl_data *); | |
899 | extern void lto_symtab_merge_decls (void); | |
2c928155 | 900 | extern void lto_symtab_merge_cgraph_nodes (void); |
d7f09764 DN |
901 | extern tree lto_symtab_prevailing_decl (tree decl); |
902 | extern enum ld_plugin_symbol_resolution lto_symtab_get_resolution (tree decl); | |
9a809897 | 903 | extern void lto_symtab_free (void); |
d7f09764 DN |
904 | |
905 | ||
906 | /* In lto-opts.c. */ | |
907 | extern void lto_register_user_option (size_t, const char *, int, int); | |
908 | extern void lto_read_file_options (struct lto_file_decl_data *); | |
909 | extern void lto_write_options (void); | |
910 | extern void lto_reissue_options (void); | |
911 | void lto_clear_user_options (void); | |
912 | void lto_clear_file_options (void); | |
913 | ||
914 | ||
915 | /* In lto-wpa-fixup.c */ | |
916 | void lto_mark_nothrow_fndecl (tree); | |
917 | void lto_fixup_nothrow_decls (void); | |
918 | ||
919 | ||
920 | /* Statistics gathered during LTO, WPA and LTRANS. */ | |
921 | extern struct lto_stats_d lto_stats; | |
922 | ||
923 | /* Section names corresponding to the values of enum lto_section_type. */ | |
924 | extern const char *lto_section_name[]; | |
925 | ||
926 | /* Holds all the out decl states of functions output so far in the | |
927 | current output file. */ | |
928 | extern VEC(lto_out_decl_state_ptr, heap) *lto_function_decl_states; | |
929 | ||
930 | /* Return true if LTO tag TAG corresponds to a tree code. */ | |
931 | static inline bool | |
932 | lto_tag_is_tree_code_p (enum LTO_tags tag) | |
933 | { | |
934 | return tag > LTO_null && (unsigned) tag <= NUM_TREE_CODES; | |
935 | } | |
936 | ||
937 | ||
938 | /* Return true if LTO tag TAG corresponds to a gimple code. */ | |
939 | static inline bool | |
940 | lto_tag_is_gimple_code_p (enum LTO_tags tag) | |
941 | { | |
942 | return (unsigned) tag >= NUM_TREE_CODES + 1 | |
943 | && (unsigned) tag < 1 + NUM_TREE_CODES + LAST_AND_UNUSED_GIMPLE_CODE; | |
944 | } | |
945 | ||
946 | ||
947 | /* Return the LTO tag corresponding to gimple code CODE. See enum | |
948 | LTO_tags for details on the conversion. */ | |
949 | static inline enum LTO_tags | |
950 | lto_gimple_code_to_tag (enum gimple_code code) | |
951 | { | |
952 | return (enum LTO_tags) ((unsigned) code + NUM_TREE_CODES + 1); | |
953 | } | |
954 | ||
955 | ||
956 | /* Return the GIMPLE code corresponding to TAG. See enum LTO_tags for | |
957 | details on the conversion. */ | |
958 | static inline enum gimple_code | |
959 | lto_tag_to_gimple_code (enum LTO_tags tag) | |
960 | { | |
961 | gcc_assert (lto_tag_is_gimple_code_p (tag)); | |
962 | return (enum gimple_code) ((unsigned) tag - NUM_TREE_CODES - 1); | |
963 | } | |
964 | ||
965 | ||
966 | /* Return the LTO tag corresponding to tree code CODE. See enum | |
967 | LTO_tags for details on the conversion. */ | |
968 | static inline enum LTO_tags | |
969 | lto_tree_code_to_tag (enum tree_code code) | |
970 | { | |
971 | return (enum LTO_tags) ((unsigned) code + 1); | |
972 | } | |
973 | ||
974 | ||
975 | /* Return the tree code corresponding to TAG. See enum LTO_tags for | |
976 | details on the conversion. */ | |
977 | static inline enum tree_code | |
978 | lto_tag_to_tree_code (enum LTO_tags tag) | |
979 | { | |
980 | gcc_assert (lto_tag_is_tree_code_p (tag)); | |
981 | return (enum tree_code) ((unsigned) tag - 1); | |
982 | } | |
983 | ||
d7f09764 DN |
984 | /* Initialize an lto_out_decl_buffer ENCODER. */ |
985 | static inline void | |
986 | lto_init_tree_ref_encoder (struct lto_tree_ref_encoder *encoder, | |
987 | htab_hash hash_fn, htab_eq eq_fn) | |
988 | { | |
989 | encoder->tree_hash_table = htab_create (37, hash_fn, eq_fn, free); | |
990 | encoder->next_index = 0; | |
991 | encoder->trees = NULL; | |
992 | } | |
993 | ||
994 | ||
995 | /* Destory an lto_tree_ref_encoder ENCODER by freeing its contents. The | |
996 | memory used by ENCODER is not freed by this function. */ | |
997 | static inline void | |
998 | lto_destroy_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) | |
999 | { | |
1000 | /* Hash table may be delete already. */ | |
1001 | if (encoder->tree_hash_table) | |
1002 | htab_delete (encoder->tree_hash_table); | |
1003 | VEC_free (tree, heap, encoder->trees); | |
1004 | } | |
1005 | ||
1006 | /* Return the number of trees encoded in ENCODER. */ | |
1007 | static inline unsigned int | |
1008 | lto_tree_ref_encoder_size (struct lto_tree_ref_encoder *encoder) | |
1009 | { | |
1010 | return VEC_length (tree, encoder->trees); | |
1011 | } | |
1012 | ||
1013 | /* Return the IDX-th tree in ENCODER. */ | |
1014 | static inline tree | |
1015 | lto_tree_ref_encoder_get_tree (struct lto_tree_ref_encoder *encoder, | |
1016 | unsigned int idx) | |
1017 | { | |
1018 | return VEC_index (tree, encoder->trees, idx); | |
1019 | } | |
1020 | ||
1021 | ||
1022 | /* Return true if LABEL should be emitted in the global context. */ | |
1023 | static inline bool | |
1024 | emit_label_in_global_context_p (tree label) | |
1025 | { | |
1026 | return DECL_NONLOCAL (label) || FORCED_LABEL (label); | |
1027 | } | |
1028 | ||
1029 | /* Return true if tree node EXPR should be streamed as a builtin. For | |
1030 | these nodes, we just emit the class and function code. */ | |
1031 | static inline bool | |
1032 | lto_stream_as_builtin_p (tree expr) | |
1033 | { | |
1034 | return (TREE_CODE (expr) == FUNCTION_DECL | |
1035 | && DECL_IS_BUILTIN (expr) | |
1036 | && (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL | |
1037 | || DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)); | |
1038 | } | |
1039 | ||
1040 | /* Return true if EXPR is a tree node that can be written to disk. */ | |
1041 | static inline bool | |
1042 | lto_is_streamable (tree expr) | |
1043 | { | |
1044 | enum tree_code code = TREE_CODE (expr); | |
1045 | ||
1046 | /* Notice that we reject SSA_NAMEs as well. We only emit the SSA | |
1047 | name version in lto_output_tree_ref (see output_ssa_names). */ | |
1048 | return !is_lang_specific (expr) | |
1049 | && code != SSA_NAME | |
1050 | && code != CALL_EXPR | |
1051 | && code != LANG_TYPE | |
1052 | && code != MODIFY_EXPR | |
1053 | && code != INIT_EXPR | |
1054 | && code != TARGET_EXPR | |
1055 | && code != BIND_EXPR | |
1056 | && code != WITH_CLEANUP_EXPR | |
1057 | && code != STATEMENT_LIST | |
1058 | && (code == CASE_LABEL_EXPR | |
1059 | || code == DECL_EXPR | |
1060 | || TREE_CODE_CLASS (code) != tcc_statement); | |
1061 | } | |
1062 | ||
1063 | DEFINE_DECL_STREAM_FUNCS (TYPE, type) | |
1064 | DEFINE_DECL_STREAM_FUNCS (FIELD_DECL, field_decl) | |
1065 | DEFINE_DECL_STREAM_FUNCS (FN_DECL, fn_decl) | |
1066 | DEFINE_DECL_STREAM_FUNCS (VAR_DECL, var_decl) | |
1067 | DEFINE_DECL_STREAM_FUNCS (TYPE_DECL, type_decl) | |
1068 | DEFINE_DECL_STREAM_FUNCS (NAMESPACE_DECL, namespace_decl) | |
1069 | DEFINE_DECL_STREAM_FUNCS (LABEL_DECL, label_decl) | |
1070 | ||
2465dcc2 RG |
1071 | /* Returns a new bit-packing context for bit-packing into S. */ |
1072 | static inline struct bitpack_d | |
1073 | bitpack_create (struct lto_output_stream *s) | |
1074 | { | |
1075 | struct bitpack_d bp; | |
1076 | bp.pos = 0; | |
1077 | bp.word = 0; | |
1078 | bp.stream = (void *)s; | |
1079 | return bp; | |
1080 | } | |
1081 | ||
1082 | /* Pack the NBITS bit sized value VAL into the bit-packing context BP. */ | |
1083 | static inline void | |
1084 | bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits) | |
1085 | { | |
1086 | bitpack_word_t word = bp->word; | |
1087 | int pos = bp->pos; | |
1088 | /* If val does not fit into the current bitpack word switch to the | |
1089 | next one. */ | |
1090 | if (pos + nbits > BITS_PER_BITPACK_WORD) | |
1091 | { | |
1092 | lto_output_uleb128_stream ((struct lto_output_stream *) bp->stream, word); | |
1093 | word = val; | |
1094 | pos = nbits; | |
1095 | } | |
1096 | else | |
1097 | { | |
1098 | word |= val << pos; | |
1099 | pos += nbits; | |
1100 | } | |
1101 | bp->word = word; | |
1102 | bp->pos = pos; | |
1103 | } | |
1104 | ||
1105 | /* Finishes bit-packing of BP. */ | |
1106 | static inline void | |
1107 | lto_output_bitpack (struct bitpack_d *bp) | |
1108 | { | |
1109 | lto_output_uleb128_stream ((struct lto_output_stream *) bp->stream, | |
1110 | bp->word); | |
1111 | bp->word = 0; | |
1112 | bp->pos = 0; | |
1113 | } | |
1114 | ||
1115 | /* Returns a new bit-packing context for bit-unpacking from IB. */ | |
1116 | static inline struct bitpack_d | |
1117 | lto_input_bitpack (struct lto_input_block *ib) | |
1118 | { | |
1119 | struct bitpack_d bp; | |
1120 | bp.word = lto_input_uleb128 (ib); | |
1121 | bp.pos = 0; | |
1122 | bp.stream = (void *)ib; | |
1123 | return bp; | |
1124 | } | |
1125 | ||
1126 | /* Unpacks NBITS bits from the bit-packing context BP and returns them. */ | |
1127 | static inline bitpack_word_t | |
1128 | bp_unpack_value (struct bitpack_d *bp, unsigned nbits) | |
1129 | { | |
1130 | bitpack_word_t mask, val; | |
1131 | int pos = bp->pos; | |
1132 | ||
1133 | mask = (nbits == BITS_PER_BITPACK_WORD | |
1134 | ? (bitpack_word_t) -1 | |
1135 | : ((bitpack_word_t) 1 << nbits) - 1); | |
1136 | ||
1137 | /* If there are not continuous nbits in the current bitpack word | |
1138 | switch to the next one. */ | |
1139 | if (pos + nbits > BITS_PER_BITPACK_WORD) | |
1140 | { | |
1141 | bp->word = val = lto_input_uleb128 ((struct lto_input_block *)bp->stream); | |
1142 | bp->pos = nbits; | |
1143 | return val & mask; | |
1144 | } | |
1145 | val = bp->word; | |
1146 | val >>= pos; | |
1147 | bp->pos = pos + nbits; | |
1148 | ||
1149 | return val & mask; | |
1150 | } | |
1151 | ||
d7f09764 | 1152 | #endif /* GCC_LTO_STREAMER_H */ |