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d7f09764 DN |
1 | /* Data structures and declarations used for reading and writing |
2 | GIMPLE to a file stream. | |
3 | ||
eb50f63a | 4 | Copyright (C) 2009, 2010, 2011 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" |
db0bf14f | 34 | #include "gcov-io.h" |
d7f09764 DN |
35 | |
36 | /* Define when debugging the LTO streamer. This causes the writer | |
37 | to output the numeric value for the memory address of the tree node | |
38 | being emitted. When debugging a problem in the reader, check the | |
39 | original address that the writer was emitting using lto_orig_address_get. | |
40 | With this value, set a breakpoint in the writer (e.g., lto_output_tree) | |
41 | to trace how the faulty node is being emitted. */ | |
42 | /* #define LTO_STREAMER_DEBUG 1 */ | |
43 | ||
44 | /* The encoding for a function consists of the following sections: | |
45 | ||
46 | 1) The header. | |
47 | 2) FIELD_DECLS. | |
48 | 3) FUNCTION_DECLS. | |
49 | 4) global VAR_DECLS. | |
50 | 5) type_decls | |
51 | 6) types. | |
52 | 7) Names for the labels that have names | |
53 | 8) The SSA names. | |
54 | 9) The control flow graph. | |
55 | 10-11)Gimple for local decls. | |
56 | 12) Gimple for the function. | |
57 | 13) Strings. | |
58 | ||
59 | 1) THE HEADER. | |
60 | 2-6) THE GLOBAL DECLS AND TYPES. | |
61 | ||
62 | The global decls and types are encoded in the same way. For each | |
63 | entry, there is word with the offset within the section to the | |
64 | entry. | |
65 | ||
b8698a0f | 66 | 7) THE LABEL NAMES. |
d7f09764 DN |
67 | |
68 | Since most labels do not have names, this section my be of zero | |
69 | length. It consists of an array of string table references, one | |
70 | per label. In the lto code, the labels are given either | |
71 | positive or negative indexes. the positive ones have names and | |
72 | the negative ones do not. The positive index can be used to | |
73 | find the name in this array. | |
74 | ||
b8698a0f | 75 | 9) THE CFG. |
d7f09764 DN |
76 | |
77 | 10) Index into the local decls. Since local decls can have local | |
78 | decls inside them, they must be read in randomly in order to | |
b8698a0f | 79 | properly restore them. |
d7f09764 DN |
80 | |
81 | 11-12) GIMPLE FOR THE LOCAL DECLS AND THE FUNCTION BODY. | |
82 | ||
83 | The gimple consists of a set of records. | |
84 | ||
85 | THE FUNCTION | |
b8698a0f | 86 | |
d7f09764 DN |
87 | At the top level of (8) is the function. It consists of five |
88 | pieces: | |
89 | ||
90 | LTO_function - The tag. | |
91 | eh tree - This is all of the exception handling regions | |
92 | put out in a post order traversial of the | |
93 | tree. Siblings are output as lists terminated | |
94 | by a 0. The set of fields matches the fields | |
95 | defined in except.c. | |
96 | ||
97 | last_basic_block - in uleb128 form. | |
98 | ||
99 | basic blocks - This is the set of basic blocks. | |
100 | ||
101 | zero - The termination of the basic blocks. | |
102 | ||
103 | BASIC BLOCKS | |
104 | ||
105 | There are two forms of basic blocks depending on if they are | |
106 | empty or not. | |
107 | ||
108 | The basic block consists of: | |
109 | ||
110 | LTO_bb1 or LTO_bb0 - The tag. | |
111 | ||
112 | bb->index - the index in uleb128 form. | |
113 | ||
114 | #succs - The number of successors un uleb128 form. | |
115 | ||
116 | the successors - For each edge, a pair. The first of the | |
117 | pair is the index of the successor in | |
118 | uleb128 form and the second are the flags in | |
119 | uleb128 form. | |
120 | ||
121 | the statements - A gimple tree, as described above. | |
122 | These are only present for LTO_BB1. | |
123 | Following each statement is an optional | |
124 | exception handling record LTO_eh_region | |
125 | which contains the region number (for | |
126 | regions >= 0). | |
127 | ||
128 | zero - This is only present for LTO_BB1 and is used | |
129 | to terminate the statements and exception | |
130 | regions within this block. | |
131 | ||
132 | 12) STRINGS | |
133 | ||
134 | String are represented in the table as pairs, a length in ULEB128 | |
135 | form followed by the data for the string. */ | |
136 | ||
137 | /* The string that is the prefix on the section names we make for lto. | |
138 | For decls the DECL_ASSEMBLER_NAME is appended to make the section | |
139 | name for the functions and static_initializers. For other types of | |
140 | sections a '.' and the section type are appended. */ | |
141 | #define LTO_SECTION_NAME_PREFIX ".gnu.lto_" | |
142 | ||
8529e24b | 143 | #define LTO_major_version 2 |
d7f09764 DN |
144 | #define LTO_minor_version 0 |
145 | ||
146 | typedef unsigned char lto_decl_flags_t; | |
147 | ||
148 | ||
149 | /* Data structures used to pack values and bitflags into a vector of | |
150 | words. Used to stream values of a fixed number of bits in a space | |
151 | efficient way. */ | |
152 | static unsigned const BITS_PER_BITPACK_WORD = HOST_BITS_PER_WIDE_INT; | |
153 | ||
154 | typedef unsigned HOST_WIDE_INT bitpack_word_t; | |
155 | DEF_VEC_I(bitpack_word_t); | |
156 | DEF_VEC_ALLOC_I(bitpack_word_t, heap); | |
157 | ||
158 | struct bitpack_d | |
159 | { | |
2465dcc2 RG |
160 | /* The position of the first unused or unconsumed bit in the word. */ |
161 | unsigned pos; | |
d7f09764 | 162 | |
2465dcc2 RG |
163 | /* The current word we are (un)packing. */ |
164 | bitpack_word_t word; | |
d7f09764 | 165 | |
2465dcc2 RG |
166 | /* The lto_output_stream or the lto_input_block we are streaming to/from. */ |
167 | void *stream; | |
d7f09764 DN |
168 | }; |
169 | ||
170 | /* Tags representing the various IL objects written to the bytecode file | |
171 | (GIMPLE statements, basic blocks, EH regions, tree nodes, etc). | |
172 | ||
173 | NOTE, when adding new LTO tags, also update lto_tag_name. */ | |
b8698a0f | 174 | enum LTO_tags |
d7f09764 DN |
175 | { |
176 | LTO_null = 0, | |
177 | ||
178 | /* Reserve enough entries to fit all the tree and gimple codes handled | |
179 | by the streamer. This guarantees that: | |
180 | ||
181 | 1- Given a tree code C: | |
182 | enum LTO_tags tag == C + 1 | |
183 | ||
184 | 2- Given a gimple code C: | |
185 | enum LTO_tags tag == C + NUM_TREE_CODES + 1 | |
186 | ||
187 | Conversely, to map between LTO tags and tree/gimple codes, the | |
188 | reverse operation must be applied. */ | |
189 | LTO_bb0 = 1 + NUM_TREE_CODES + LAST_AND_UNUSED_GIMPLE_CODE, | |
190 | LTO_bb1, | |
191 | ||
192 | /* EH region holding the previous statement. */ | |
193 | LTO_eh_region, | |
194 | ||
195 | /* An MD or NORMAL builtin. Only the code and class are streamed out. */ | |
196 | LTO_builtin_decl, | |
197 | ||
198 | /* Function body. */ | |
199 | LTO_function, | |
200 | ||
201 | /* EH table. */ | |
202 | LTO_eh_table, | |
203 | ||
204 | /* EH region types. These mirror enum eh_region_type. */ | |
205 | LTO_ert_cleanup, | |
206 | LTO_ert_try, | |
207 | LTO_ert_allowed_exceptions, | |
208 | LTO_ert_must_not_throw, | |
209 | ||
210 | /* EH landing pad. */ | |
211 | LTO_eh_landing_pad, | |
212 | ||
213 | /* EH try/catch node. */ | |
214 | LTO_eh_catch, | |
215 | ||
216 | /* Special for global streamer. Reference to previously-streamed node. */ | |
217 | LTO_tree_pickle_reference, | |
218 | ||
219 | /* References to indexable tree nodes. These objects are stored in | |
220 | tables that are written separately from the function bodies that | |
221 | reference them. This way they can be instantiated even when the | |
222 | referencing functions aren't (e.g., during WPA) and it also allows | |
223 | functions to be copied from one file to another without having | |
224 | to unpickle the body first (the references are location | |
225 | independent). | |
226 | ||
227 | NOTE, do not regroup these values as the grouping is exposed | |
228 | in the range checks done in lto_input_tree. */ | |
229 | LTO_field_decl_ref, /* Do not change. */ | |
230 | LTO_function_decl_ref, | |
231 | LTO_label_decl_ref, | |
232 | LTO_namespace_decl_ref, | |
233 | LTO_result_decl_ref, | |
234 | LTO_ssa_name_ref, | |
235 | LTO_type_decl_ref, | |
236 | LTO_type_ref, | |
237 | LTO_const_decl_ref, | |
238 | LTO_imported_decl_ref, | |
6be14c0e | 239 | LTO_translation_unit_decl_ref, |
d7f09764 DN |
240 | LTO_global_decl_ref, /* Do not change. */ |
241 | ||
242 | /* This tag must always be last. */ | |
243 | LTO_NUM_TAGS | |
244 | }; | |
245 | ||
246 | ||
247 | /* Set of section types that are in an LTO file. This list will grow | |
248 | as the number of IPA passes grows since each IPA pass will need its | |
249 | own section type to store its summary information. | |
250 | ||
251 | When adding a new section type, you must also extend the | |
252 | LTO_SECTION_NAME array in lto-section-in.c. */ | |
253 | enum lto_section_type | |
254 | { | |
255 | LTO_section_decls = 0, | |
256 | LTO_section_function_body, | |
257 | LTO_section_static_initializer, | |
258 | LTO_section_cgraph, | |
2942c502 | 259 | LTO_section_varpool, |
369451ec | 260 | LTO_section_refs, |
fb3f88cc | 261 | LTO_section_jump_functions, |
d7f09764 DN |
262 | LTO_section_ipa_pure_const, |
263 | LTO_section_ipa_reference, | |
264 | LTO_section_symtab, | |
d7f09764 | 265 | LTO_section_opts, |
922f15c2 | 266 | LTO_section_cgraph_opt_sum, |
10a5dd5d | 267 | LTO_section_inline_summary, |
d7f09764 DN |
268 | LTO_N_SECTION_TYPES /* Must be last. */ |
269 | }; | |
270 | ||
271 | /* Indices to the various function, type and symbol streams. */ | |
272 | typedef enum | |
273 | { | |
274 | LTO_DECL_STREAM_TYPE = 0, /* Must be first. */ | |
275 | LTO_DECL_STREAM_FIELD_DECL, | |
276 | LTO_DECL_STREAM_FN_DECL, | |
277 | LTO_DECL_STREAM_VAR_DECL, | |
278 | LTO_DECL_STREAM_TYPE_DECL, | |
279 | LTO_DECL_STREAM_NAMESPACE_DECL, | |
280 | LTO_DECL_STREAM_LABEL_DECL, | |
281 | LTO_N_DECL_STREAMS | |
282 | } lto_decl_stream_e_t; | |
283 | ||
284 | typedef enum ld_plugin_symbol_resolution ld_plugin_symbol_resolution_t; | |
285 | DEF_VEC_I(ld_plugin_symbol_resolution_t); | |
286 | DEF_VEC_ALLOC_I(ld_plugin_symbol_resolution_t, heap); | |
287 | ||
288 | ||
289 | /* Macro to define convenience functions for type and decl streams | |
b8698a0f | 290 | in lto_file_decl_data. */ |
d7f09764 DN |
291 | #define DEFINE_DECL_STREAM_FUNCS(UPPER_NAME, name) \ |
292 | static inline tree \ | |
293 | lto_file_decl_data_get_ ## name (struct lto_file_decl_data *data, \ | |
294 | unsigned int idx) \ | |
295 | { \ | |
296 | struct lto_in_decl_state *state = data->current_decl_state; \ | |
297 | gcc_assert (idx < state->streams[LTO_DECL_STREAM_## UPPER_NAME].size); \ | |
298 | return state->streams[LTO_DECL_STREAM_## UPPER_NAME].trees[idx]; \ | |
299 | } \ | |
300 | \ | |
301 | static inline unsigned int \ | |
302 | lto_file_decl_data_num_ ## name ## s (struct lto_file_decl_data *data) \ | |
303 | { \ | |
304 | struct lto_in_decl_state *state = data->current_decl_state; \ | |
305 | return state->streams[LTO_DECL_STREAM_## UPPER_NAME].size; \ | |
306 | } | |
307 | ||
308 | ||
309 | /* Return a char pointer to the start of a data stream for an lto pass | |
310 | or function. The first parameter is the file data that contains | |
311 | the information. The second parameter is the type of information | |
312 | to be obtained. The third parameter is the name of the function | |
b8698a0f | 313 | and is only used when finding a function body; otherwise it is |
d7f09764 | 314 | NULL. The fourth parameter is the length of the data returned. */ |
b8698a0f | 315 | typedef const char* (lto_get_section_data_f) (struct lto_file_decl_data *, |
d7f09764 | 316 | enum lto_section_type, |
b8698a0f | 317 | const char *, |
d7f09764 DN |
318 | size_t *); |
319 | ||
320 | /* Return the data found from the above call. The first three | |
321 | parameters are the same as above. The fourth parameter is the data | |
322 | itself and the fifth is the lenght of the data. */ | |
b8698a0f | 323 | typedef void (lto_free_section_data_f) (struct lto_file_decl_data *, |
d7f09764 DN |
324 | enum lto_section_type, |
325 | const char *, | |
326 | const char *, | |
327 | size_t); | |
328 | ||
329 | /* Cache of pickled nodes. Used to avoid writing the same node more | |
330 | than once. The first time a tree node is streamed out, it is | |
331 | entered in this cache. Subsequent references to the same node are | |
332 | resolved by looking it up in this cache. | |
333 | ||
334 | This is used in two ways: | |
335 | ||
336 | - On the writing side, the first time T is added to STREAMER_CACHE, | |
337 | a new reference index is created for T and T is emitted on the | |
338 | stream. If T needs to be emitted again to the stream, instead of | |
339 | pickling it again, the reference index is emitted. | |
340 | ||
341 | - On the reading side, the first time T is read from the stream, it | |
342 | is reconstructed in memory and a new reference index created for | |
343 | T. The reconstructed T is inserted in some array so that when | |
344 | the reference index for T is found in the input stream, it can be | |
345 | used to look up into the array to get the reconstructed T. */ | |
346 | struct lto_streamer_cache_d | |
347 | { | |
348 | /* The mapping between tree nodes and slots into the nodes array. */ | |
c33406f5 | 349 | struct pointer_map_t *node_map; |
5c4f225f | 350 | |
d7f09764 | 351 | /* The nodes pickled so far. */ |
979aeb33 | 352 | VEC(tree,heap) *nodes; |
d7f09764 DN |
353 | }; |
354 | ||
355 | ||
356 | /* Structure used as buffer for reading an LTO file. */ | |
b8698a0f | 357 | struct lto_input_block |
d7f09764 DN |
358 | { |
359 | const char *data; | |
360 | unsigned int p; | |
361 | unsigned int len; | |
362 | }; | |
363 | ||
364 | #define LTO_INIT_INPUT_BLOCK(BASE,D,P,L) \ | |
365 | do { \ | |
366 | BASE.data = D; \ | |
367 | BASE.p = P; \ | |
368 | BASE.len = L; \ | |
369 | } while (0) | |
370 | ||
371 | #define LTO_INIT_INPUT_BLOCK_PTR(BASE,D,P,L) \ | |
372 | do { \ | |
373 | BASE->data = D; \ | |
374 | BASE->p = P; \ | |
375 | BASE->len = L; \ | |
376 | } while (0) | |
377 | ||
378 | ||
379 | /* The is the first part of the record for a function or constructor | |
380 | in the .o file. */ | |
381 | struct lto_header | |
382 | { | |
383 | int16_t major_version; | |
384 | int16_t minor_version; | |
385 | enum lto_section_type section_type; | |
386 | }; | |
387 | ||
388 | /* The header for a function body. */ | |
389 | struct lto_function_header | |
390 | { | |
391 | /* The header for all types of sections. */ | |
392 | struct lto_header lto_header; | |
393 | ||
394 | /* Number of labels with names. */ | |
395 | int32_t num_named_labels; | |
396 | ||
397 | /* Number of labels without names. */ | |
398 | int32_t num_unnamed_labels; | |
399 | ||
400 | /* Size compressed or 0 if not compressed. */ | |
401 | int32_t compressed_size; | |
402 | ||
403 | /* Size of names for named labels. */ | |
404 | int32_t named_label_size; | |
405 | ||
406 | /* Size of the cfg. */ | |
407 | int32_t cfg_size; | |
408 | ||
409 | /* Size of main gimple body of function. */ | |
410 | int32_t main_size; | |
411 | ||
412 | /* Size of the string table. */ | |
413 | int32_t string_size; | |
414 | }; | |
415 | ||
416 | ||
417 | /* Structure describing a symbol section. */ | |
418 | struct lto_decl_header | |
419 | { | |
420 | /* The header for all types of sections. */ | |
421 | struct lto_header lto_header; | |
422 | ||
423 | /* Size of region for decl state. */ | |
424 | int32_t decl_state_size; | |
425 | ||
426 | /* Number of nodes in globals stream. */ | |
427 | int32_t num_nodes; | |
428 | ||
429 | /* Size of region for expressions, decls, types, etc. */ | |
430 | int32_t main_size; | |
431 | ||
432 | /* Size of the string table. */ | |
433 | int32_t string_size; | |
434 | }; | |
435 | ||
436 | ||
437 | /* Statistics gathered during LTO, WPA and LTRANS. */ | |
438 | struct lto_stats_d | |
439 | { | |
440 | unsigned HOST_WIDE_INT num_input_cgraph_nodes; | |
441 | unsigned HOST_WIDE_INT num_output_cgraph_nodes; | |
442 | unsigned HOST_WIDE_INT num_input_files; | |
443 | unsigned HOST_WIDE_INT num_output_files; | |
444 | unsigned HOST_WIDE_INT num_cgraph_partitions; | |
445 | unsigned HOST_WIDE_INT section_size[LTO_N_SECTION_TYPES]; | |
446 | unsigned HOST_WIDE_INT num_function_bodies; | |
447 | unsigned HOST_WIDE_INT num_trees[NUM_TREE_CODES]; | |
448 | unsigned HOST_WIDE_INT num_output_il_bytes; | |
449 | unsigned HOST_WIDE_INT num_compressed_il_bytes; | |
450 | unsigned HOST_WIDE_INT num_input_il_bytes; | |
451 | unsigned HOST_WIDE_INT num_uncompressed_il_bytes; | |
452 | }; | |
453 | ||
454 | /* Encoder data structure used to stream callgraph nodes. */ | |
455 | struct lto_cgraph_encoder_d | |
456 | { | |
457 | /* Map nodes to reference number. */ | |
458 | struct pointer_map_t *map; | |
459 | ||
460 | /* Map reference number to node. */ | |
461 | VEC(cgraph_node_ptr,heap) *nodes; | |
91fbf0c7 JH |
462 | |
463 | /* Map of nodes where we want to output body. */ | |
464 | struct pointer_set_t *body; | |
d7f09764 DN |
465 | }; |
466 | ||
467 | typedef struct lto_cgraph_encoder_d *lto_cgraph_encoder_t; | |
468 | ||
91fbf0c7 JH |
469 | /* Return number of encoded nodes in ENCODER. */ |
470 | ||
471 | static inline int | |
472 | lto_cgraph_encoder_size (lto_cgraph_encoder_t encoder) | |
473 | { | |
474 | return VEC_length (cgraph_node_ptr, encoder->nodes); | |
475 | } | |
476 | ||
477 | ||
2f41ecf5 JH |
478 | /* Encoder data structure used to stream callgraph nodes. */ |
479 | struct lto_varpool_encoder_d | |
480 | { | |
481 | /* Map nodes to reference number. */ | |
482 | struct pointer_map_t *map; | |
483 | ||
484 | /* Map reference number to node. */ | |
485 | VEC(varpool_node_ptr,heap) *nodes; | |
486 | ||
487 | /* Map of nodes where we want to output initializer. */ | |
488 | struct pointer_set_t *initializer; | |
489 | }; | |
490 | typedef struct lto_varpool_encoder_d *lto_varpool_encoder_t; | |
491 | ||
703e95cf JH |
492 | /* Return number of encoded nodes in ENCODER. */ |
493 | ||
494 | static inline int | |
495 | lto_varpool_encoder_size (lto_varpool_encoder_t encoder) | |
496 | { | |
497 | return VEC_length (varpool_node_ptr, encoder->nodes); | |
498 | } | |
499 | ||
d7f09764 | 500 | /* Mapping from indices to trees. */ |
49ba8180 | 501 | struct GTY(()) lto_tree_ref_table |
d7f09764 DN |
502 | { |
503 | /* Array of referenced trees . */ | |
49ba8180 | 504 | tree * GTY((length ("%h.size"))) trees; |
d7f09764 DN |
505 | |
506 | /* Size of array. */ | |
507 | unsigned int size; | |
508 | }; | |
509 | ||
510 | ||
511 | /* Mapping between trees and slots in an array. */ | |
512 | struct lto_decl_slot | |
513 | { | |
514 | tree t; | |
515 | int slot_num; | |
516 | }; | |
517 | ||
518 | ||
519 | /* The lto_tree_ref_encoder struct is used to encode trees into indices. */ | |
520 | ||
521 | struct lto_tree_ref_encoder | |
522 | { | |
523 | htab_t tree_hash_table; /* Maps pointers to indices. */ | |
524 | unsigned int next_index; /* Next available index. */ | |
525 | VEC(tree,heap) *trees; /* Maps indices to pointers. */ | |
526 | }; | |
527 | ||
528 | ||
529 | /* Structure to hold states of input scope. */ | |
49ba8180 | 530 | struct GTY(()) lto_in_decl_state |
d7f09764 DN |
531 | { |
532 | /* Array of lto_in_decl_buffers to store type and decls streams. */ | |
533 | struct lto_tree_ref_table streams[LTO_N_DECL_STREAMS]; | |
534 | ||
535 | /* If this in-decl state is associated with a function. FN_DECL | |
536 | point to the FUNCTION_DECL. */ | |
537 | tree fn_decl; | |
538 | }; | |
539 | ||
540 | typedef struct lto_in_decl_state *lto_in_decl_state_ptr; | |
541 | ||
542 | ||
543 | /* The structure that holds all of the vectors of global types, | |
544 | decls and cgraph nodes used in the serialization of this file. */ | |
545 | struct lto_out_decl_state | |
546 | { | |
547 | /* The buffers contain the sets of decls of various kinds and types we have | |
548 | seen so far and the indexes assigned to them. */ | |
549 | struct lto_tree_ref_encoder streams[LTO_N_DECL_STREAMS]; | |
550 | ||
551 | /* Encoder for cgraph nodes. */ | |
552 | lto_cgraph_encoder_t cgraph_node_encoder; | |
553 | ||
2f41ecf5 JH |
554 | /* Encoder for varpool nodes. */ |
555 | lto_varpool_encoder_t varpool_node_encoder; | |
556 | ||
d7f09764 DN |
557 | /* If this out-decl state belongs to a function, fn_decl points to that |
558 | function. Otherwise, it is NULL. */ | |
559 | tree fn_decl; | |
560 | }; | |
561 | ||
562 | typedef struct lto_out_decl_state *lto_out_decl_state_ptr; | |
563 | ||
564 | DEF_VEC_P(lto_out_decl_state_ptr); | |
565 | DEF_VEC_ALLOC_P(lto_out_decl_state_ptr, heap); | |
566 | ||
567 | /* One of these is allocated for each object file that being compiled | |
568 | by lto. This structure contains the tables that are needed by the | |
569 | serialized functions and ipa passes to connect themselves to the | |
570 | global types and decls as they are reconstituted. */ | |
49ba8180 | 571 | struct GTY(()) lto_file_decl_data |
d7f09764 DN |
572 | { |
573 | /* Decl state currently used. */ | |
574 | struct lto_in_decl_state *current_decl_state; | |
575 | ||
576 | /* Decl state corresponding to regions outside of any functions | |
577 | in the compilation unit. */ | |
578 | struct lto_in_decl_state *global_decl_state; | |
579 | ||
580 | /* Table of cgraph nodes present in this file. */ | |
49ba8180 | 581 | lto_cgraph_encoder_t GTY((skip)) cgraph_node_encoder; |
d7f09764 | 582 | |
2f41ecf5 JH |
583 | /* Table of varpool nodes present in this file. */ |
584 | lto_varpool_encoder_t GTY((skip)) varpool_node_encoder; | |
585 | ||
d7f09764 | 586 | /* Hash table maps lto-related section names to location in file. */ |
49ba8180 | 587 | htab_t GTY((param_is (struct lto_in_decl_state))) function_decl_states; |
d7f09764 DN |
588 | |
589 | /* The .o file that these offsets relate to. */ | |
49ba8180 | 590 | const char *GTY((skip)) file_name; |
d7f09764 | 591 | |
d7f09764 | 592 | /* Hash table maps lto-related section names to location in file. */ |
49ba8180 | 593 | htab_t GTY((skip)) section_hash_table; |
d7f09764 DN |
594 | |
595 | /* Hash new name of renamed global declaration to its original name. */ | |
49ba8180 | 596 | htab_t GTY((skip)) renaming_hash_table; |
73ce4d1e AK |
597 | |
598 | /* Linked list used temporarily in reader */ | |
599 | struct lto_file_decl_data *next; | |
600 | ||
601 | /* Sub ID for merged objects. */ | |
602 | unsigned id; | |
603 | ||
604 | /* Symbol resolutions for this file */ | |
b7956a5b | 605 | VEC(ld_plugin_symbol_resolution_t,heap) * GTY((skip)) resolutions; |
db0bf14f JH |
606 | |
607 | struct gcov_ctr_summary GTY((skip)) profile_info; | |
d7f09764 DN |
608 | }; |
609 | ||
a9429e29 LB |
610 | typedef struct lto_file_decl_data *lto_file_decl_data_ptr; |
611 | ||
d7f09764 DN |
612 | struct lto_char_ptr_base |
613 | { | |
614 | char *ptr; | |
615 | }; | |
616 | ||
617 | /* An incore byte stream to buffer the various parts of the function. | |
618 | The entire structure should be zeroed when created. The record | |
619 | consists of a set of blocks. The first sizeof (ptr) bytes are used | |
620 | as a chain, and the rest store the bytes to be written. */ | |
621 | struct lto_output_stream | |
622 | { | |
623 | /* The pointer to the first block in the stream. */ | |
624 | struct lto_char_ptr_base * first_block; | |
625 | ||
626 | /* The pointer to the last and current block in the stream. */ | |
627 | struct lto_char_ptr_base * current_block; | |
628 | ||
629 | /* The pointer to where the next char should be written. */ | |
630 | char * current_pointer; | |
631 | ||
632 | /* The number of characters left in the current block. */ | |
633 | unsigned int left_in_block; | |
634 | ||
635 | /* The block size of the last block allocated. */ | |
636 | unsigned int block_size; | |
637 | ||
638 | /* The total number of characters written. */ | |
639 | unsigned int total_size; | |
640 | }; | |
641 | ||
642 | /* The is the first part of the record in an LTO file for many of the | |
643 | IPA passes. */ | |
644 | struct lto_simple_header | |
645 | { | |
646 | /* The header for all types of sections. */ | |
647 | struct lto_header lto_header; | |
648 | ||
649 | /* Size of main gimple body of function. */ | |
650 | int32_t main_size; | |
651 | ||
652 | /* Size of main stream when compressed. */ | |
653 | int32_t compressed_size; | |
654 | }; | |
655 | ||
656 | /* A simple output block. This can be used for simple IPA passes that | |
657 | do not need more than one stream. */ | |
658 | struct lto_simple_output_block | |
659 | { | |
660 | enum lto_section_type section_type; | |
661 | struct lto_out_decl_state *decl_state; | |
662 | ||
663 | /* The stream that the main tree codes are written to. */ | |
664 | struct lto_output_stream *main_stream; | |
665 | }; | |
666 | ||
667 | /* Data structure holding all the data and descriptors used when writing | |
668 | an LTO file. */ | |
669 | struct output_block | |
670 | { | |
671 | enum lto_section_type section_type; | |
672 | struct lto_out_decl_state *decl_state; | |
673 | ||
674 | /* The stream that the main tree codes are written to. */ | |
675 | struct lto_output_stream *main_stream; | |
676 | ||
677 | /* The stream that contains the string table. */ | |
678 | struct lto_output_stream *string_stream; | |
679 | ||
680 | /* The stream that contains the cfg. */ | |
681 | struct lto_output_stream *cfg_stream; | |
682 | ||
683 | /* The hash table that contains the set of strings we have seen so | |
684 | far and the indexes assigned to them. */ | |
685 | htab_t string_hash_table; | |
686 | ||
687 | /* The current cgraph_node that we are currently serializing. Null | |
688 | if we are serializing something else. */ | |
689 | struct cgraph_node *cgraph_node; | |
690 | ||
691 | /* These are the last file and line that were seen in the stream. | |
692 | If the current node differs from these, it needs to insert | |
693 | something into the stream and fix these up. */ | |
694 | const char *current_file; | |
695 | int current_line; | |
696 | int current_col; | |
697 | ||
698 | /* True if writing globals and types. */ | |
699 | bool global; | |
700 | ||
701 | /* Cache of nodes written in this section. */ | |
702 | struct lto_streamer_cache_d *writer_cache; | |
703 | }; | |
704 | ||
705 | ||
706 | /* Data and descriptors used when reading from an LTO file. */ | |
707 | struct data_in | |
708 | { | |
709 | /* The global decls and types. */ | |
710 | struct lto_file_decl_data *file_data; | |
711 | ||
712 | /* All of the labels. */ | |
713 | tree *labels; | |
714 | ||
715 | /* The string table. */ | |
716 | const char *strings; | |
717 | ||
718 | /* The length of the string table. */ | |
719 | unsigned int strings_len; | |
720 | ||
721 | /* Number of named labels. Used to find the index of unnamed labels | |
722 | since they share space with the named labels. */ | |
b8698a0f | 723 | unsigned int num_named_labels; |
d7f09764 DN |
724 | |
725 | /* Number of unnamed labels. */ | |
726 | unsigned int num_unnamed_labels; | |
727 | ||
728 | const char *current_file; | |
729 | int current_line; | |
730 | int current_col; | |
731 | ||
732 | /* Maps each reference number to the resolution done by the linker. */ | |
733 | VEC(ld_plugin_symbol_resolution_t,heap) *globals_resolution; | |
734 | ||
735 | /* Cache of pickled nodes. */ | |
736 | struct lto_streamer_cache_d *reader_cache; | |
737 | }; | |
738 | ||
739 | ||
740 | /* In lto-section-in.c */ | |
741 | extern struct lto_input_block * lto_create_simple_input_block ( | |
b8698a0f | 742 | struct lto_file_decl_data *, |
d7f09764 DN |
743 | enum lto_section_type, const char **, size_t *); |
744 | extern void | |
b8698a0f | 745 | lto_destroy_simple_input_block (struct lto_file_decl_data *, |
d7f09764 DN |
746 | enum lto_section_type, |
747 | struct lto_input_block *, const char *, size_t); | |
b8698a0f | 748 | extern void lto_set_in_hooks (struct lto_file_decl_data **, |
d7f09764 DN |
749 | lto_get_section_data_f *, |
750 | lto_free_section_data_f *); | |
751 | extern struct lto_file_decl_data **lto_get_file_decl_data (void); | |
752 | extern const char *lto_get_section_data (struct lto_file_decl_data *, | |
753 | enum lto_section_type, | |
754 | const char *, size_t *); | |
755 | extern void lto_free_section_data (struct lto_file_decl_data *, | |
756 | enum lto_section_type, | |
757 | const char *, const char *, size_t); | |
d7f09764 DN |
758 | extern unsigned HOST_WIDE_INT lto_input_uleb128 (struct lto_input_block *); |
759 | extern unsigned HOST_WIDEST_INT lto_input_widest_uint_uleb128 ( | |
760 | struct lto_input_block *); | |
761 | extern HOST_WIDE_INT lto_input_sleb128 (struct lto_input_block *); | |
762 | extern htab_t lto_create_renaming_table (void); | |
763 | extern void lto_record_renamed_decl (struct lto_file_decl_data *, | |
764 | const char *, const char *); | |
765 | extern const char *lto_get_decl_name_mapping (struct lto_file_decl_data *, | |
766 | const char *); | |
767 | extern struct lto_in_decl_state *lto_new_in_decl_state (void); | |
768 | extern void lto_delete_in_decl_state (struct lto_in_decl_state *); | |
769 | extern hashval_t lto_hash_in_decl_state (const void *); | |
770 | extern int lto_eq_in_decl_state (const void *, const void *); | |
771 | extern struct lto_in_decl_state *lto_get_function_in_decl_state ( | |
772 | struct lto_file_decl_data *, tree); | |
bc0fe8cb | 773 | extern void lto_section_overrun (struct lto_input_block *) ATTRIBUTE_NORETURN; |
f242c0a5 JH |
774 | extern void lto_value_range_error (const char *, |
775 | HOST_WIDE_INT, HOST_WIDE_INT, | |
776 | HOST_WIDE_INT) ATTRIBUTE_NORETURN; | |
51a9ed47 JH |
777 | extern void bp_pack_var_len_unsigned (struct bitpack_d *, unsigned HOST_WIDE_INT); |
778 | extern void bp_pack_var_len_int (struct bitpack_d *, HOST_WIDE_INT); | |
779 | extern unsigned HOST_WIDE_INT bp_unpack_var_len_unsigned (struct bitpack_d *); | |
780 | extern HOST_WIDE_INT bp_unpack_var_len_int (struct bitpack_d *); | |
d7f09764 DN |
781 | |
782 | /* In lto-section-out.c */ | |
783 | extern hashval_t lto_hash_decl_slot_node (const void *); | |
784 | extern int lto_eq_decl_slot_node (const void *, const void *); | |
785 | extern hashval_t lto_hash_type_slot_node (const void *); | |
786 | extern int lto_eq_type_slot_node (const void *, const void *); | |
787 | extern void lto_begin_section (const char *, bool); | |
788 | extern void lto_end_section (void); | |
789 | extern void lto_write_stream (struct lto_output_stream *); | |
d7f09764 DN |
790 | extern void lto_output_data_stream (struct lto_output_stream *, const void *, |
791 | size_t); | |
792 | extern void lto_output_uleb128_stream (struct lto_output_stream *, | |
793 | unsigned HOST_WIDE_INT); | |
794 | extern void lto_output_widest_uint_uleb128_stream (struct lto_output_stream *, | |
795 | unsigned HOST_WIDEST_INT); | |
796 | extern void lto_output_sleb128_stream (struct lto_output_stream *, | |
797 | HOST_WIDE_INT); | |
798 | extern bool lto_output_decl_index (struct lto_output_stream *, | |
799 | struct lto_tree_ref_encoder *, | |
800 | tree, unsigned int *); | |
801 | extern void lto_output_field_decl_index (struct lto_out_decl_state *, | |
802 | struct lto_output_stream *, tree); | |
803 | extern void lto_output_fn_decl_index (struct lto_out_decl_state *, | |
804 | struct lto_output_stream *, tree); | |
805 | extern void lto_output_namespace_decl_index (struct lto_out_decl_state *, | |
806 | struct lto_output_stream *, tree); | |
807 | extern void lto_output_var_decl_index (struct lto_out_decl_state *, | |
808 | struct lto_output_stream *, tree); | |
809 | extern void lto_output_type_decl_index (struct lto_out_decl_state *, | |
810 | struct lto_output_stream *, tree); | |
811 | extern void lto_output_type_ref_index (struct lto_out_decl_state *, | |
812 | struct lto_output_stream *, tree); | |
813 | extern struct lto_simple_output_block *lto_create_simple_output_block ( | |
814 | enum lto_section_type); | |
815 | extern void lto_destroy_simple_output_block (struct lto_simple_output_block *); | |
816 | extern struct lto_out_decl_state *lto_new_out_decl_state (void); | |
817 | extern void lto_delete_out_decl_state (struct lto_out_decl_state *); | |
818 | extern struct lto_out_decl_state *lto_get_out_decl_state (void); | |
819 | extern void lto_push_out_decl_state (struct lto_out_decl_state *); | |
820 | extern struct lto_out_decl_state *lto_pop_out_decl_state (void); | |
821 | extern void lto_record_function_out_decl_state (tree, | |
822 | struct lto_out_decl_state *); | |
bc0fe8cb | 823 | extern void lto_append_block (struct lto_output_stream *); |
d7f09764 DN |
824 | |
825 | ||
826 | /* In lto-streamer.c. */ | |
827 | extern const char *lto_tag_name (enum LTO_tags); | |
828 | extern bitmap lto_bitmap_alloc (void); | |
829 | extern void lto_bitmap_free (bitmap); | |
73ce4d1e | 830 | extern char *lto_get_section_name (int, const char *, struct lto_file_decl_data *); |
d7f09764 | 831 | extern void print_lto_report (void); |
d7f09764 | 832 | extern bool lto_streamer_cache_insert (struct lto_streamer_cache_d *, tree, |
e89964e3 | 833 | unsigned *); |
d7f09764 | 834 | extern bool lto_streamer_cache_insert_at (struct lto_streamer_cache_d *, tree, |
e89964e3 MM |
835 | unsigned); |
836 | extern void lto_streamer_cache_append (struct lto_streamer_cache_d *, tree); | |
d7f09764 | 837 | extern bool lto_streamer_cache_lookup (struct lto_streamer_cache_d *, tree, |
e89964e3 MM |
838 | unsigned *); |
839 | extern tree lto_streamer_cache_get (struct lto_streamer_cache_d *, unsigned); | |
d7f09764 DN |
840 | extern struct lto_streamer_cache_d *lto_streamer_cache_create (void); |
841 | extern void lto_streamer_cache_delete (struct lto_streamer_cache_d *); | |
842 | extern void lto_streamer_init (void); | |
843 | extern bool gate_lto_out (void); | |
844 | #ifdef LTO_STREAMER_DEBUG | |
845 | extern void lto_orig_address_map (tree, intptr_t); | |
846 | extern intptr_t lto_orig_address_get (tree); | |
847 | extern void lto_orig_address_remove (tree); | |
848 | #endif | |
849 | extern void lto_check_version (int, int); | |
850 | ||
851 | ||
852 | /* In lto-streamer-in.c */ | |
d7f09764 DN |
853 | extern void lto_input_cgraph (struct lto_file_decl_data *, const char *); |
854 | extern void lto_init_reader (void); | |
855 | extern tree lto_input_tree (struct lto_input_block *, struct data_in *); | |
856 | extern void lto_input_function_body (struct lto_file_decl_data *, tree, | |
857 | const char *); | |
858 | extern void lto_input_constructors_and_inits (struct lto_file_decl_data *, | |
859 | const char *); | |
d7f09764 DN |
860 | extern void lto_init_reader (void); |
861 | extern struct data_in *lto_data_in_create (struct lto_file_decl_data *, | |
862 | const char *, unsigned, | |
863 | VEC(ld_plugin_symbol_resolution_t,heap) *); | |
864 | extern void lto_data_in_delete (struct data_in *); | |
a183b5c7 DN |
865 | extern const char *lto_input_string (struct data_in *, |
866 | struct lto_input_block *); | |
867 | extern void lto_input_data_block (struct lto_input_block *, void *, size_t); | |
d7f09764 DN |
868 | |
869 | ||
870 | /* In lto-streamer-out.c */ | |
871 | extern void lto_register_decl_definition (tree, struct lto_file_decl_data *); | |
872 | extern struct output_block *create_output_block (enum lto_section_type); | |
873 | extern void destroy_output_block (struct output_block *); | |
874 | extern void lto_output_tree (struct output_block *, tree, bool); | |
fb3f88cc | 875 | extern void produce_asm (struct output_block *ob, tree fn); |
a183b5c7 DN |
876 | extern void lto_output_string (struct output_block *, |
877 | struct lto_output_stream *, | |
878 | const char *); | |
879 | extern void lto_output_string_with_length (struct output_block *, | |
880 | struct lto_output_stream *, | |
881 | const char *, | |
882 | unsigned int); | |
883 | void lto_output_decl_state_streams (struct output_block *, | |
884 | struct lto_out_decl_state *); | |
885 | void lto_output_decl_state_refs (struct output_block *, | |
886 | struct lto_output_stream *, | |
887 | struct lto_out_decl_state *); | |
d7f09764 DN |
888 | |
889 | ||
890 | /* In lto-cgraph.c */ | |
891 | struct cgraph_node *lto_cgraph_encoder_deref (lto_cgraph_encoder_t, int); | |
892 | int lto_cgraph_encoder_lookup (lto_cgraph_encoder_t, struct cgraph_node *); | |
893 | lto_cgraph_encoder_t lto_cgraph_encoder_new (void); | |
894 | int lto_cgraph_encoder_encode (lto_cgraph_encoder_t, struct cgraph_node *); | |
2f41ecf5 | 895 | void lto_cgraph_encoder_delete (lto_cgraph_encoder_t); |
91fbf0c7 JH |
896 | bool lto_cgraph_encoder_encode_body_p (lto_cgraph_encoder_t, |
897 | struct cgraph_node *); | |
898 | ||
899 | bool lto_varpool_encoder_encode_body_p (lto_varpool_encoder_t, | |
900 | struct varpool_node *); | |
2f41ecf5 JH |
901 | struct varpool_node *lto_varpool_encoder_deref (lto_varpool_encoder_t, int); |
902 | int lto_varpool_encoder_lookup (lto_varpool_encoder_t, struct varpool_node *); | |
903 | lto_varpool_encoder_t lto_varpool_encoder_new (void); | |
904 | int lto_varpool_encoder_encode (lto_varpool_encoder_t, struct varpool_node *); | |
905 | void lto_varpool_encoder_delete (lto_varpool_encoder_t); | |
906 | bool lto_varpool_encoder_encode_initializer_p (lto_varpool_encoder_t, | |
907 | struct varpool_node *); | |
908 | void output_cgraph (cgraph_node_set, varpool_node_set); | |
d7f09764 | 909 | void input_cgraph (void); |
369451ec JH |
910 | bool referenced_from_other_partition_p (struct ipa_ref_list *, |
911 | cgraph_node_set, | |
912 | varpool_node_set vset); | |
9a809897 JH |
913 | bool reachable_from_other_partition_p (struct cgraph_node *, |
914 | cgraph_node_set); | |
f3380641 JH |
915 | bool referenced_from_this_partition_p (struct ipa_ref_list *, |
916 | cgraph_node_set, | |
917 | varpool_node_set vset); | |
918 | bool reachable_from_this_partition_p (struct cgraph_node *, | |
919 | cgraph_node_set); | |
920 | void compute_ltrans_boundary (struct lto_out_decl_state *state, | |
921 | cgraph_node_set, varpool_node_set); | |
d7f09764 DN |
922 | |
923 | ||
924 | /* In lto-symtab.c. */ | |
1a735925 RG |
925 | extern void lto_symtab_register_decl (tree, ld_plugin_symbol_resolution_t, |
926 | struct lto_file_decl_data *); | |
927 | extern void lto_symtab_merge_decls (void); | |
2c928155 | 928 | extern void lto_symtab_merge_cgraph_nodes (void); |
d7f09764 DN |
929 | extern tree lto_symtab_prevailing_decl (tree decl); |
930 | extern enum ld_plugin_symbol_resolution lto_symtab_get_resolution (tree decl); | |
9a809897 | 931 | extern void lto_symtab_free (void); |
237d6259 | 932 | extern GTY(()) VEC(tree,gc) *lto_global_var_decls; |
d7f09764 DN |
933 | |
934 | ||
935 | /* In lto-opts.c. */ | |
eb50f63a | 936 | extern void lto_register_user_option (size_t, const char *, int, unsigned int); |
d7f09764 DN |
937 | extern void lto_read_file_options (struct lto_file_decl_data *); |
938 | extern void lto_write_options (void); | |
939 | extern void lto_reissue_options (void); | |
940 | void lto_clear_user_options (void); | |
941 | void lto_clear_file_options (void); | |
942 | ||
943 | ||
944 | /* In lto-wpa-fixup.c */ | |
945 | void lto_mark_nothrow_fndecl (tree); | |
946 | void lto_fixup_nothrow_decls (void); | |
947 | ||
948 | ||
949 | /* Statistics gathered during LTO, WPA and LTRANS. */ | |
950 | extern struct lto_stats_d lto_stats; | |
951 | ||
952 | /* Section names corresponding to the values of enum lto_section_type. */ | |
953 | extern const char *lto_section_name[]; | |
954 | ||
955 | /* Holds all the out decl states of functions output so far in the | |
956 | current output file. */ | |
957 | extern VEC(lto_out_decl_state_ptr, heap) *lto_function_decl_states; | |
958 | ||
959 | /* Return true if LTO tag TAG corresponds to a tree code. */ | |
960 | static inline bool | |
961 | lto_tag_is_tree_code_p (enum LTO_tags tag) | |
962 | { | |
963 | return tag > LTO_null && (unsigned) tag <= NUM_TREE_CODES; | |
964 | } | |
965 | ||
966 | ||
967 | /* Return true if LTO tag TAG corresponds to a gimple code. */ | |
968 | static inline bool | |
969 | lto_tag_is_gimple_code_p (enum LTO_tags tag) | |
970 | { | |
971 | return (unsigned) tag >= NUM_TREE_CODES + 1 | |
972 | && (unsigned) tag < 1 + NUM_TREE_CODES + LAST_AND_UNUSED_GIMPLE_CODE; | |
973 | } | |
974 | ||
975 | ||
976 | /* Return the LTO tag corresponding to gimple code CODE. See enum | |
977 | LTO_tags for details on the conversion. */ | |
978 | static inline enum LTO_tags | |
979 | lto_gimple_code_to_tag (enum gimple_code code) | |
980 | { | |
981 | return (enum LTO_tags) ((unsigned) code + NUM_TREE_CODES + 1); | |
982 | } | |
983 | ||
984 | ||
985 | /* Return the GIMPLE code corresponding to TAG. See enum LTO_tags for | |
986 | details on the conversion. */ | |
987 | static inline enum gimple_code | |
988 | lto_tag_to_gimple_code (enum LTO_tags tag) | |
989 | { | |
990 | gcc_assert (lto_tag_is_gimple_code_p (tag)); | |
991 | return (enum gimple_code) ((unsigned) tag - NUM_TREE_CODES - 1); | |
992 | } | |
993 | ||
994 | ||
995 | /* Return the LTO tag corresponding to tree code CODE. See enum | |
996 | LTO_tags for details on the conversion. */ | |
997 | static inline enum LTO_tags | |
998 | lto_tree_code_to_tag (enum tree_code code) | |
999 | { | |
1000 | return (enum LTO_tags) ((unsigned) code + 1); | |
1001 | } | |
1002 | ||
1003 | ||
1004 | /* Return the tree code corresponding to TAG. See enum LTO_tags for | |
1005 | details on the conversion. */ | |
1006 | static inline enum tree_code | |
1007 | lto_tag_to_tree_code (enum LTO_tags tag) | |
1008 | { | |
1009 | gcc_assert (lto_tag_is_tree_code_p (tag)); | |
1010 | return (enum tree_code) ((unsigned) tag - 1); | |
1011 | } | |
1012 | ||
d7f09764 DN |
1013 | /* Initialize an lto_out_decl_buffer ENCODER. */ |
1014 | static inline void | |
1015 | lto_init_tree_ref_encoder (struct lto_tree_ref_encoder *encoder, | |
1016 | htab_hash hash_fn, htab_eq eq_fn) | |
1017 | { | |
1018 | encoder->tree_hash_table = htab_create (37, hash_fn, eq_fn, free); | |
1019 | encoder->next_index = 0; | |
1020 | encoder->trees = NULL; | |
1021 | } | |
1022 | ||
1023 | ||
1024 | /* Destory an lto_tree_ref_encoder ENCODER by freeing its contents. The | |
1025 | memory used by ENCODER is not freed by this function. */ | |
1026 | static inline void | |
1027 | lto_destroy_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) | |
1028 | { | |
1029 | /* Hash table may be delete already. */ | |
1030 | if (encoder->tree_hash_table) | |
1031 | htab_delete (encoder->tree_hash_table); | |
1032 | VEC_free (tree, heap, encoder->trees); | |
1033 | } | |
1034 | ||
1035 | /* Return the number of trees encoded in ENCODER. */ | |
1036 | static inline unsigned int | |
1037 | lto_tree_ref_encoder_size (struct lto_tree_ref_encoder *encoder) | |
1038 | { | |
1039 | return VEC_length (tree, encoder->trees); | |
1040 | } | |
1041 | ||
1042 | /* Return the IDX-th tree in ENCODER. */ | |
1043 | static inline tree | |
1044 | lto_tree_ref_encoder_get_tree (struct lto_tree_ref_encoder *encoder, | |
1045 | unsigned int idx) | |
1046 | { | |
1047 | return VEC_index (tree, encoder->trees, idx); | |
1048 | } | |
1049 | ||
1050 | ||
1051 | /* Return true if LABEL should be emitted in the global context. */ | |
1052 | static inline bool | |
1053 | emit_label_in_global_context_p (tree label) | |
1054 | { | |
1055 | return DECL_NONLOCAL (label) || FORCED_LABEL (label); | |
1056 | } | |
1057 | ||
1058 | /* Return true if tree node EXPR should be streamed as a builtin. For | |
1059 | these nodes, we just emit the class and function code. */ | |
1060 | static inline bool | |
1061 | lto_stream_as_builtin_p (tree expr) | |
1062 | { | |
1063 | return (TREE_CODE (expr) == FUNCTION_DECL | |
1064 | && DECL_IS_BUILTIN (expr) | |
1065 | && (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL | |
1066 | || DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)); | |
1067 | } | |
1068 | ||
1069 | /* Return true if EXPR is a tree node that can be written to disk. */ | |
1070 | static inline bool | |
1071 | lto_is_streamable (tree expr) | |
1072 | { | |
1073 | enum tree_code code = TREE_CODE (expr); | |
1074 | ||
1075 | /* Notice that we reject SSA_NAMEs as well. We only emit the SSA | |
1076 | name version in lto_output_tree_ref (see output_ssa_names). */ | |
1077 | return !is_lang_specific (expr) | |
1078 | && code != SSA_NAME | |
1079 | && code != CALL_EXPR | |
1080 | && code != LANG_TYPE | |
1081 | && code != MODIFY_EXPR | |
1082 | && code != INIT_EXPR | |
1083 | && code != TARGET_EXPR | |
1084 | && code != BIND_EXPR | |
1085 | && code != WITH_CLEANUP_EXPR | |
1086 | && code != STATEMENT_LIST | |
1087 | && (code == CASE_LABEL_EXPR | |
1088 | || code == DECL_EXPR | |
1089 | || TREE_CODE_CLASS (code) != tcc_statement); | |
1090 | } | |
1091 | ||
1092 | DEFINE_DECL_STREAM_FUNCS (TYPE, type) | |
1093 | DEFINE_DECL_STREAM_FUNCS (FIELD_DECL, field_decl) | |
1094 | DEFINE_DECL_STREAM_FUNCS (FN_DECL, fn_decl) | |
1095 | DEFINE_DECL_STREAM_FUNCS (VAR_DECL, var_decl) | |
1096 | DEFINE_DECL_STREAM_FUNCS (TYPE_DECL, type_decl) | |
1097 | DEFINE_DECL_STREAM_FUNCS (NAMESPACE_DECL, namespace_decl) | |
1098 | DEFINE_DECL_STREAM_FUNCS (LABEL_DECL, label_decl) | |
1099 | ||
2465dcc2 RG |
1100 | /* Returns a new bit-packing context for bit-packing into S. */ |
1101 | static inline struct bitpack_d | |
1102 | bitpack_create (struct lto_output_stream *s) | |
1103 | { | |
1104 | struct bitpack_d bp; | |
1105 | bp.pos = 0; | |
1106 | bp.word = 0; | |
1107 | bp.stream = (void *)s; | |
1108 | return bp; | |
1109 | } | |
1110 | ||
1111 | /* Pack the NBITS bit sized value VAL into the bit-packing context BP. */ | |
1112 | static inline void | |
1113 | bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits) | |
1114 | { | |
1115 | bitpack_word_t word = bp->word; | |
1116 | int pos = bp->pos; | |
51a9ed47 JH |
1117 | |
1118 | /* Verify that VAL fits in the NBITS. */ | |
1119 | gcc_checking_assert (nbits == BITS_PER_BITPACK_WORD | |
1120 | || !(val & ~(((bitpack_word_t)1<<nbits)-1))); | |
1121 | ||
2465dcc2 RG |
1122 | /* If val does not fit into the current bitpack word switch to the |
1123 | next one. */ | |
1124 | if (pos + nbits > BITS_PER_BITPACK_WORD) | |
1125 | { | |
1126 | lto_output_uleb128_stream ((struct lto_output_stream *) bp->stream, word); | |
1127 | word = val; | |
1128 | pos = nbits; | |
1129 | } | |
1130 | else | |
1131 | { | |
1132 | word |= val << pos; | |
1133 | pos += nbits; | |
1134 | } | |
1135 | bp->word = word; | |
1136 | bp->pos = pos; | |
1137 | } | |
1138 | ||
1139 | /* Finishes bit-packing of BP. */ | |
1140 | static inline void | |
1141 | lto_output_bitpack (struct bitpack_d *bp) | |
1142 | { | |
1143 | lto_output_uleb128_stream ((struct lto_output_stream *) bp->stream, | |
1144 | bp->word); | |
1145 | bp->word = 0; | |
1146 | bp->pos = 0; | |
1147 | } | |
1148 | ||
1149 | /* Returns a new bit-packing context for bit-unpacking from IB. */ | |
1150 | static inline struct bitpack_d | |
1151 | lto_input_bitpack (struct lto_input_block *ib) | |
1152 | { | |
1153 | struct bitpack_d bp; | |
1154 | bp.word = lto_input_uleb128 (ib); | |
1155 | bp.pos = 0; | |
1156 | bp.stream = (void *)ib; | |
1157 | return bp; | |
1158 | } | |
1159 | ||
1160 | /* Unpacks NBITS bits from the bit-packing context BP and returns them. */ | |
1161 | static inline bitpack_word_t | |
1162 | bp_unpack_value (struct bitpack_d *bp, unsigned nbits) | |
1163 | { | |
1164 | bitpack_word_t mask, val; | |
1165 | int pos = bp->pos; | |
1166 | ||
1167 | mask = (nbits == BITS_PER_BITPACK_WORD | |
1168 | ? (bitpack_word_t) -1 | |
1169 | : ((bitpack_word_t) 1 << nbits) - 1); | |
1170 | ||
1171 | /* If there are not continuous nbits in the current bitpack word | |
1172 | switch to the next one. */ | |
1173 | if (pos + nbits > BITS_PER_BITPACK_WORD) | |
1174 | { | |
1175 | bp->word = val = lto_input_uleb128 ((struct lto_input_block *)bp->stream); | |
1176 | bp->pos = nbits; | |
1177 | return val & mask; | |
1178 | } | |
1179 | val = bp->word; | |
1180 | val >>= pos; | |
1181 | bp->pos = pos + nbits; | |
1182 | ||
1183 | return val & mask; | |
1184 | } | |
1185 | ||
bc0fe8cb JH |
1186 | |
1187 | /* Write a character to the output block. */ | |
1188 | ||
1189 | static inline void | |
1190 | lto_output_1_stream (struct lto_output_stream *obs, char c) | |
1191 | { | |
1192 | /* No space left. */ | |
1193 | if (obs->left_in_block == 0) | |
1194 | lto_append_block (obs); | |
1195 | ||
1196 | /* Write the actual character. */ | |
1197 | *obs->current_pointer = c; | |
1198 | obs->current_pointer++; | |
1199 | obs->total_size++; | |
1200 | obs->left_in_block--; | |
1201 | } | |
1202 | ||
1203 | ||
1204 | /* Read byte from the input block. */ | |
1205 | ||
1206 | static inline unsigned char | |
1207 | lto_input_1_unsigned (struct lto_input_block *ib) | |
1208 | { | |
1209 | if (ib->p >= ib->len) | |
1210 | lto_section_overrun (ib); | |
1211 | return (ib->data[ib->p++]); | |
1212 | } | |
1213 | ||
f242c0a5 JH |
1214 | /* Output VAL into OBS and verify it is in range MIN...MAX that is supposed |
1215 | to be compile time constant. | |
1216 | Be host independent, limit range to 31bits. */ | |
1217 | ||
1218 | static inline void | |
1219 | lto_output_int_in_range (struct lto_output_stream *obs, | |
1220 | HOST_WIDE_INT min, | |
1221 | HOST_WIDE_INT max, | |
1222 | HOST_WIDE_INT val) | |
1223 | { | |
1224 | HOST_WIDE_INT range = max - min; | |
1225 | ||
1226 | gcc_checking_assert (val >= min && val <= max && range > 0 | |
1227 | && range < 0x7fffffff); | |
1228 | ||
1229 | val -= min; | |
1230 | lto_output_1_stream (obs, val & 255); | |
1231 | if (range >= 0xff) | |
1232 | lto_output_1_stream (obs, (val << 8) & 255); | |
1233 | if (range >= 0xffff) | |
1234 | lto_output_1_stream (obs, (val << 16) & 255); | |
1235 | if (range >= 0xffffff) | |
1236 | lto_output_1_stream (obs, (val << 24) & 255); | |
1237 | } | |
1238 | ||
1239 | /* Input VAL into OBS and verify it is in range MIN...MAX that is supposed | |
1240 | to be compile time constant. PURPOSE is used for error reporting. */ | |
1241 | ||
1242 | static inline HOST_WIDE_INT | |
1243 | lto_input_int_in_range (struct lto_input_block *ib, | |
1244 | const char *purpose, | |
1245 | HOST_WIDE_INT min, | |
1246 | HOST_WIDE_INT max) | |
1247 | { | |
1248 | HOST_WIDE_INT range = max - min; | |
1249 | HOST_WIDE_INT val = lto_input_1_unsigned (ib); | |
1250 | ||
1251 | gcc_checking_assert (range > 0 && range < 0x7fffffff); | |
1252 | ||
1253 | if (range >= 0xff) | |
1254 | val |= ((HOST_WIDE_INT)lto_input_1_unsigned (ib)) << 8; | |
1255 | if (range >= 0xffff) | |
1256 | val |= ((HOST_WIDE_INT)lto_input_1_unsigned (ib)) << 16; | |
1257 | if (range >= 0xffffff) | |
1258 | val |= ((HOST_WIDE_INT)lto_input_1_unsigned (ib)) << 24; | |
1259 | val += min; | |
1260 | if (val < min || val > max) | |
1261 | lto_value_range_error (purpose, val, min, max); | |
1262 | return val; | |
1263 | } | |
1264 | ||
fa766006 JH |
1265 | |
1266 | /* Output VAL into BP and verify it is in range MIN...MAX that is supposed | |
1267 | to be compile time constant. | |
1268 | Be host independent, limit range to 31bits. */ | |
1269 | ||
1270 | static inline void | |
1271 | bp_pack_int_in_range (struct bitpack_d *bp, | |
1272 | HOST_WIDE_INT min, | |
1273 | HOST_WIDE_INT max, | |
1274 | HOST_WIDE_INT val) | |
1275 | { | |
1276 | HOST_WIDE_INT range = max - min; | |
1277 | int nbits = floor_log2 (range) + 1; | |
1278 | ||
1279 | gcc_checking_assert (val >= min && val <= max && range > 0 | |
1280 | && range < 0x7fffffff); | |
1281 | ||
1282 | val -= min; | |
1283 | bp_pack_value (bp, val, nbits); | |
1284 | } | |
1285 | ||
1286 | /* Input VAL into BP and verify it is in range MIN...MAX that is supposed | |
1287 | to be compile time constant. PURPOSE is used for error reporting. */ | |
1288 | ||
1289 | static inline HOST_WIDE_INT | |
1290 | bp_unpack_int_in_range (struct bitpack_d *bp, | |
1291 | const char *purpose, | |
1292 | HOST_WIDE_INT min, | |
1293 | HOST_WIDE_INT max) | |
1294 | { | |
1295 | HOST_WIDE_INT range = max - min; | |
1296 | int nbits = floor_log2 (range) + 1; | |
1297 | HOST_WIDE_INT val = bp_unpack_value (bp, nbits); | |
1298 | ||
1299 | gcc_checking_assert (range > 0 && range < 0x7fffffff); | |
1300 | ||
1301 | if (val < min || val > max) | |
1302 | lto_value_range_error (purpose, val, min, max); | |
1303 | return val; | |
1304 | } | |
1305 | ||
f242c0a5 JH |
1306 | /* Output VAL of type "enum enum_name" into OBS. |
1307 | Assume range 0...ENUM_LAST - 1. */ | |
1308 | #define lto_output_enum(obs,enum_name,enum_last,val) \ | |
1309 | lto_output_int_in_range ((obs), 0, (int)(enum_last) - 1, (int)(val)) | |
1310 | ||
1311 | /* Input enum of type "enum enum_name" from IB. | |
1312 | Assume range 0...ENUM_LAST - 1. */ | |
1313 | #define lto_input_enum(ib,enum_name,enum_last) \ | |
1314 | (enum enum_name)lto_input_int_in_range ((ib), #enum_name, 0, \ | |
1315 | (int)(enum_last) - 1) | |
1316 | ||
fa766006 JH |
1317 | /* Output VAL of type "enum enum_name" into BP. |
1318 | Assume range 0...ENUM_LAST - 1. */ | |
1319 | #define bp_pack_enum(bp,enum_name,enum_last,val) \ | |
1320 | bp_pack_int_in_range ((bp), 0, (int)(enum_last) - 1, (int)(val)) | |
1321 | ||
1322 | /* Input enum of type "enum enum_name" from BP. | |
1323 | Assume range 0...ENUM_LAST - 1. */ | |
1324 | #define bp_unpack_enum(bp,enum_name,enum_last) \ | |
1325 | (enum enum_name)bp_unpack_int_in_range ((bp), #enum_name, 0, \ | |
1326 | (int)(enum_last) - 1) | |
1327 | ||
d7f09764 | 1328 | #endif /* GCC_LTO_STREAMER_H */ |