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a79420f9 | 1 | /* Top-level LTO routines. |
a945c346 | 2 | Copyright (C) 2009-2024 Free Software Foundation, Inc. |
a79420f9 ML |
3 | Contributed by CodeSourcery, Inc. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include "tm.h" | |
25 | #include "function.h" | |
26 | #include "bitmap.h" | |
27 | #include "basic-block.h" | |
28 | #include "tree.h" | |
29 | #include "gimple.h" | |
30 | #include "cfghooks.h" | |
31 | #include "alloc-pool.h" | |
32 | #include "tree-pass.h" | |
33 | #include "tree-streamer.h" | |
34 | #include "cgraph.h" | |
35 | #include "opts.h" | |
36 | #include "toplev.h" | |
37 | #include "stor-layout.h" | |
38 | #include "symbol-summary.h" | |
39 | #include "tree-vrp.h" | |
40 | #include "ipa-prop.h" | |
41 | #include "common.h" | |
42 | #include "debug.h" | |
43 | #include "lto.h" | |
44 | #include "lto-section-names.h" | |
45 | #include "splay-tree.h" | |
46 | #include "lto-partition.h" | |
47 | #include "context.h" | |
48 | #include "pass_manager.h" | |
49 | #include "ipa-fnsummary.h" | |
a79420f9 ML |
50 | #include "ipa-utils.h" |
51 | #include "gomp-constants.h" | |
52 | #include "lto-symtab.h" | |
53 | #include "stringpool.h" | |
54 | #include "fold-const.h" | |
55 | #include "attribs.h" | |
56 | #include "builtins.h" | |
57 | #include "lto-common.h" | |
a0276c00 | 58 | #include "tree-pretty-print.h" |
03d90a20 | 59 | #include "print-tree.h" |
a0276c00 JH |
60 | |
61 | /* True when no new types are going to be streamd from the global stream. */ | |
62 | ||
63 | static bool type_streaming_finished = false; | |
a79420f9 ML |
64 | |
65 | GTY(()) tree first_personality_decl; | |
66 | ||
a79420f9 ML |
67 | /* Returns a hash code for P. */ |
68 | ||
69 | static hashval_t | |
70 | hash_name (const void *p) | |
71 | { | |
72 | const struct lto_section_slot *ds = (const struct lto_section_slot *) p; | |
73 | return (hashval_t) htab_hash_string (ds->name); | |
74 | } | |
75 | ||
76 | ||
77 | /* Returns nonzero if P1 and P2 are equal. */ | |
78 | ||
79 | static int | |
80 | eq_name (const void *p1, const void *p2) | |
81 | { | |
ee7a003f ML |
82 | const struct lto_section_slot *s1 |
83 | = (const struct lto_section_slot *) p1; | |
84 | const struct lto_section_slot *s2 | |
85 | = (const struct lto_section_slot *) p2; | |
a79420f9 ML |
86 | |
87 | return strcmp (s1->name, s2->name) == 0; | |
88 | } | |
89 | ||
ee7a003f | 90 | /* Free lto_section_slot. */ |
a79420f9 ML |
91 | |
92 | static void | |
93 | free_with_string (void *arg) | |
94 | { | |
95 | struct lto_section_slot *s = (struct lto_section_slot *)arg; | |
96 | ||
97 | free (CONST_CAST (char *, s->name)); | |
98 | free (arg); | |
99 | } | |
100 | ||
ee7a003f | 101 | /* Create section hash table. */ |
a79420f9 | 102 | |
ee7a003f | 103 | htab_t |
a79420f9 ML |
104 | lto_obj_create_section_hash_table (void) |
105 | { | |
106 | return htab_create (37, hash_name, eq_name, free_with_string); | |
107 | } | |
108 | ||
109 | /* Delete an allocated integer KEY in the splay tree. */ | |
110 | ||
111 | static void | |
112 | lto_splay_tree_delete_id (splay_tree_key key) | |
113 | { | |
114 | free ((void *) key); | |
115 | } | |
116 | ||
117 | /* Compare splay tree node ids A and B. */ | |
118 | ||
119 | static int | |
120 | lto_splay_tree_compare_ids (splay_tree_key a, splay_tree_key b) | |
121 | { | |
122 | unsigned HOST_WIDE_INT ai; | |
123 | unsigned HOST_WIDE_INT bi; | |
124 | ||
125 | ai = *(unsigned HOST_WIDE_INT *) a; | |
126 | bi = *(unsigned HOST_WIDE_INT *) b; | |
127 | ||
128 | if (ai < bi) | |
129 | return -1; | |
130 | else if (ai > bi) | |
131 | return 1; | |
132 | return 0; | |
133 | } | |
134 | ||
135 | /* Look up splay tree node by ID in splay tree T. */ | |
136 | ||
137 | static splay_tree_node | |
138 | lto_splay_tree_lookup (splay_tree t, unsigned HOST_WIDE_INT id) | |
139 | { | |
140 | return splay_tree_lookup (t, (splay_tree_key) &id); | |
141 | } | |
142 | ||
143 | /* Check if KEY has ID. */ | |
144 | ||
145 | static bool | |
146 | lto_splay_tree_id_equal_p (splay_tree_key key, unsigned HOST_WIDE_INT id) | |
147 | { | |
148 | return *(unsigned HOST_WIDE_INT *) key == id; | |
149 | } | |
150 | ||
ee7a003f | 151 | /* Insert a splay tree node into tree T with ID as key and FILE_DATA as value. |
a79420f9 | 152 | The ID is allocated separately because we need HOST_WIDE_INTs which may |
ee7a003f | 153 | be wider than a splay_tree_key. */ |
a79420f9 ML |
154 | |
155 | static void | |
156 | lto_splay_tree_insert (splay_tree t, unsigned HOST_WIDE_INT id, | |
157 | struct lto_file_decl_data *file_data) | |
158 | { | |
159 | unsigned HOST_WIDE_INT *idp = XCNEW (unsigned HOST_WIDE_INT); | |
160 | *idp = id; | |
161 | splay_tree_insert (t, (splay_tree_key) idp, (splay_tree_value) file_data); | |
162 | } | |
163 | ||
164 | /* Create a splay tree. */ | |
165 | ||
166 | static splay_tree | |
167 | lto_splay_tree_new (void) | |
168 | { | |
169 | return splay_tree_new (lto_splay_tree_compare_ids, | |
ee7a003f | 170 | lto_splay_tree_delete_id, |
a79420f9 ML |
171 | NULL); |
172 | } | |
173 | ||
174 | /* Decode the content of memory pointed to by DATA in the in decl | |
ee7a003f ML |
175 | state object STATE. DATA_IN points to a data_in structure for |
176 | decoding. Return the address after the decoded object in the | |
a79420f9 ML |
177 | input. */ |
178 | ||
179 | static const uint32_t * | |
99b1c316 | 180 | lto_read_in_decl_state (class data_in *data_in, const uint32_t *data, |
a79420f9 ML |
181 | struct lto_in_decl_state *state) |
182 | { | |
183 | uint32_t ix; | |
184 | tree decl; | |
185 | uint32_t i, j; | |
186 | ||
187 | ix = *data++; | |
188 | state->compressed = ix & 1; | |
189 | ix /= 2; | |
190 | decl = streamer_tree_cache_get_tree (data_in->reader_cache, ix); | |
191 | if (!VAR_OR_FUNCTION_DECL_P (decl)) | |
192 | { | |
193 | gcc_assert (decl == void_type_node); | |
194 | decl = NULL_TREE; | |
195 | } | |
196 | state->fn_decl = decl; | |
197 | ||
198 | for (i = 0; i < LTO_N_DECL_STREAMS; i++) | |
199 | { | |
200 | uint32_t size = *data++; | |
201 | vec<tree, va_gc> *decls = NULL; | |
202 | vec_alloc (decls, size); | |
203 | ||
204 | for (j = 0; j < size; j++) | |
205 | vec_safe_push (decls, | |
206 | streamer_tree_cache_get_tree (data_in->reader_cache, | |
207 | data[j])); | |
208 | ||
209 | state->streams[i] = decls; | |
210 | data += size; | |
211 | } | |
212 | ||
213 | return data; | |
214 | } | |
215 | ||
216 | ||
217 | /* Global canonical type table. */ | |
218 | static htab_t gimple_canonical_types; | |
219 | static hash_map<const_tree, hashval_t> *canonical_type_hash_cache; | |
220 | static unsigned long num_canonical_type_hash_entries; | |
221 | static unsigned long num_canonical_type_hash_queries; | |
222 | ||
a0276c00 JH |
223 | /* Types postponed for registration to the canonical type table. |
224 | During streaming we postpone all TYPE_CXX_ODR_P types so we can alter | |
225 | decide whether there is conflict with non-ODR type or not. */ | |
226 | static GTY(()) vec<tree, va_gc> *types_to_register = NULL; | |
227 | ||
a79420f9 ML |
228 | static void iterative_hash_canonical_type (tree type, inchash::hash &hstate); |
229 | static hashval_t gimple_canonical_type_hash (const void *p); | |
a0276c00 | 230 | static hashval_t gimple_register_canonical_type_1 (tree t, hashval_t hash); |
a79420f9 ML |
231 | |
232 | /* Returning a hash value for gimple type TYPE. | |
233 | ||
234 | The hash value returned is equal for types considered compatible | |
235 | by gimple_canonical_types_compatible_p. */ | |
236 | ||
237 | static hashval_t | |
238 | hash_canonical_type (tree type) | |
239 | { | |
240 | inchash::hash hstate; | |
241 | enum tree_code code; | |
242 | ||
243 | /* We compute alias sets only for types that needs them. | |
244 | Be sure we do not recurse to something else as we cannot hash incomplete | |
245 | types in a way they would have same hash value as compatible complete | |
246 | types. */ | |
247 | gcc_checking_assert (type_with_alias_set_p (type)); | |
248 | ||
249 | /* Combine a few common features of types so that types are grouped into | |
250 | smaller sets; when searching for existing matching types to merge, | |
251 | only existing types having the same features as the new type will be | |
252 | checked. */ | |
253 | code = tree_code_for_canonical_type_merging (TREE_CODE (type)); | |
254 | hstate.add_int (code); | |
255 | hstate.add_int (TYPE_MODE (type)); | |
256 | ||
257 | /* Incorporate common features of numerical types. */ | |
258 | if (INTEGRAL_TYPE_P (type) | |
259 | || SCALAR_FLOAT_TYPE_P (type) | |
260 | || FIXED_POINT_TYPE_P (type) | |
261 | || TREE_CODE (type) == OFFSET_TYPE | |
262 | || POINTER_TYPE_P (type)) | |
263 | { | |
264 | hstate.add_int (TYPE_PRECISION (type)); | |
265 | if (!type_with_interoperable_signedness (type)) | |
ee7a003f | 266 | hstate.add_int (TYPE_UNSIGNED (type)); |
a79420f9 ML |
267 | } |
268 | ||
269 | if (VECTOR_TYPE_P (type)) | |
270 | { | |
271 | hstate.add_poly_int (TYPE_VECTOR_SUBPARTS (type)); | |
272 | hstate.add_int (TYPE_UNSIGNED (type)); | |
273 | } | |
274 | ||
275 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
276 | hstate.add_int (TYPE_UNSIGNED (type)); | |
277 | ||
278 | /* Fortran's C_SIGNED_CHAR is !TYPE_STRING_FLAG but needs to be | |
279 | interoperable with "signed char". Unless all frontends are revisited to | |
280 | agree on these types, we must ignore the flag completely. */ | |
281 | ||
282 | /* Fortran standard define C_PTR type that is compatible with every | |
283 | C pointer. For this reason we need to glob all pointers into one. | |
284 | Still pointers in different address spaces are not compatible. */ | |
285 | if (POINTER_TYPE_P (type)) | |
286 | hstate.add_int (TYPE_ADDR_SPACE (TREE_TYPE (type))); | |
287 | ||
288 | /* For array types hash the domain bounds and the string flag. */ | |
289 | if (TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type)) | |
290 | { | |
291 | hstate.add_int (TYPE_STRING_FLAG (type)); | |
292 | /* OMP lowering can introduce error_mark_node in place of | |
293 | random local decls in types. */ | |
294 | if (TYPE_MIN_VALUE (TYPE_DOMAIN (type)) != error_mark_node) | |
295 | inchash::add_expr (TYPE_MIN_VALUE (TYPE_DOMAIN (type)), hstate); | |
296 | if (TYPE_MAX_VALUE (TYPE_DOMAIN (type)) != error_mark_node) | |
297 | inchash::add_expr (TYPE_MAX_VALUE (TYPE_DOMAIN (type)), hstate); | |
298 | } | |
299 | ||
300 | /* Recurse for aggregates with a single element type. */ | |
301 | if (TREE_CODE (type) == ARRAY_TYPE | |
302 | || TREE_CODE (type) == COMPLEX_TYPE | |
303 | || TREE_CODE (type) == VECTOR_TYPE) | |
304 | iterative_hash_canonical_type (TREE_TYPE (type), hstate); | |
305 | ||
306 | /* Incorporate function return and argument types. */ | |
307 | if (TREE_CODE (type) == FUNCTION_TYPE || TREE_CODE (type) == METHOD_TYPE) | |
308 | { | |
309 | unsigned na; | |
310 | tree p; | |
311 | ||
312 | iterative_hash_canonical_type (TREE_TYPE (type), hstate); | |
313 | ||
314 | for (p = TYPE_ARG_TYPES (type), na = 0; p; p = TREE_CHAIN (p)) | |
315 | { | |
316 | iterative_hash_canonical_type (TREE_VALUE (p), hstate); | |
317 | na++; | |
318 | } | |
319 | ||
320 | hstate.add_int (na); | |
321 | } | |
322 | ||
323 | if (RECORD_OR_UNION_TYPE_P (type)) | |
324 | { | |
325 | unsigned nf; | |
326 | tree f; | |
327 | ||
328 | for (f = TYPE_FIELDS (type), nf = 0; f; f = TREE_CHAIN (f)) | |
329 | if (TREE_CODE (f) == FIELD_DECL | |
330 | && (! DECL_SIZE (f) | |
331 | || ! integer_zerop (DECL_SIZE (f)))) | |
332 | { | |
333 | iterative_hash_canonical_type (TREE_TYPE (f), hstate); | |
334 | nf++; | |
335 | } | |
336 | ||
337 | hstate.add_int (nf); | |
338 | } | |
339 | ||
340 | return hstate.end(); | |
341 | } | |
342 | ||
343 | /* Returning a hash value for gimple type TYPE combined with VAL. */ | |
344 | ||
345 | static void | |
346 | iterative_hash_canonical_type (tree type, inchash::hash &hstate) | |
347 | { | |
348 | hashval_t v; | |
349 | ||
350 | /* All type variants have same TYPE_CANONICAL. */ | |
351 | type = TYPE_MAIN_VARIANT (type); | |
352 | ||
353 | if (!canonical_type_used_p (type)) | |
354 | v = hash_canonical_type (type); | |
355 | /* An already processed type. */ | |
356 | else if (TYPE_CANONICAL (type)) | |
357 | { | |
358 | type = TYPE_CANONICAL (type); | |
359 | v = gimple_canonical_type_hash (type); | |
360 | } | |
361 | else | |
362 | { | |
363 | /* Canonical types should not be able to form SCCs by design, this | |
364 | recursion is just because we do not register canonical types in | |
365 | optimal order. To avoid quadratic behavior also register the | |
366 | type here. */ | |
367 | v = hash_canonical_type (type); | |
a0276c00 | 368 | v = gimple_register_canonical_type_1 (type, v); |
a79420f9 | 369 | } |
a0276c00 | 370 | hstate.merge_hash (v); |
a79420f9 ML |
371 | } |
372 | ||
373 | /* Returns the hash for a canonical type P. */ | |
374 | ||
375 | static hashval_t | |
376 | gimple_canonical_type_hash (const void *p) | |
377 | { | |
378 | num_canonical_type_hash_queries++; | |
379 | hashval_t *slot = canonical_type_hash_cache->get ((const_tree) p); | |
380 | gcc_assert (slot != NULL); | |
381 | return *slot; | |
382 | } | |
383 | ||
384 | ||
385 | ||
386 | /* Returns nonzero if P1 and P2 are equal. */ | |
387 | ||
388 | static int | |
389 | gimple_canonical_type_eq (const void *p1, const void *p2) | |
390 | { | |
391 | const_tree t1 = (const_tree) p1; | |
392 | const_tree t2 = (const_tree) p2; | |
393 | return gimple_canonical_types_compatible_p (CONST_CAST_TREE (t1), | |
394 | CONST_CAST_TREE (t2)); | |
395 | } | |
396 | ||
397 | /* Main worker for gimple_register_canonical_type. */ | |
398 | ||
a0276c00 | 399 | static hashval_t |
a79420f9 ML |
400 | gimple_register_canonical_type_1 (tree t, hashval_t hash) |
401 | { | |
402 | void **slot; | |
403 | ||
404 | gcc_checking_assert (TYPE_P (t) && !TYPE_CANONICAL (t) | |
405 | && type_with_alias_set_p (t) | |
406 | && canonical_type_used_p (t)); | |
407 | ||
a0276c00 JH |
408 | /* ODR types for which there is no ODR violation and we did not record |
409 | structurally equivalent non-ODR type can be treated as unique by their | |
410 | name. | |
411 | ||
412 | hash passed to gimple_register_canonical_type_1 is a structural hash | |
413 | that we can use to lookup structurally equivalent non-ODR type. | |
414 | In case we decide to treat type as unique ODR type we recompute hash based | |
415 | on name and let TBAA machinery know about our decision. */ | |
18dd2956 JH |
416 | if (RECORD_OR_UNION_TYPE_P (t) && odr_type_p (t) |
417 | && TYPE_CXX_ODR_P (t) && !odr_type_violation_reported_p (t)) | |
a0276c00 | 418 | { |
b01659aa JH |
419 | /* Anonymous namespace types never conflict with non-C++ types. */ |
420 | if (type_with_linkage_p (t) && type_in_anonymous_namespace_p (t)) | |
421 | slot = NULL; | |
422 | else | |
423 | { | |
424 | /* Here we rely on fact that all non-ODR types was inserted into | |
425 | canonical type hash and thus we can safely detect conflicts between | |
426 | ODR types and interoperable non-ODR types. */ | |
427 | gcc_checking_assert (type_streaming_finished | |
428 | && TYPE_MAIN_VARIANT (t) == t); | |
429 | slot = htab_find_slot_with_hash (gimple_canonical_types, t, hash, | |
430 | NO_INSERT); | |
431 | } | |
a0276c00 JH |
432 | if (slot && !TYPE_CXX_ODR_P (*(tree *)slot)) |
433 | { | |
434 | tree nonodr = *(tree *)slot; | |
18dd2956 | 435 | gcc_checking_assert (!flag_ltrans); |
a0276c00 JH |
436 | if (symtab->dump_file) |
437 | { | |
438 | fprintf (symtab->dump_file, | |
439 | "ODR and non-ODR type conflict: "); | |
440 | print_generic_expr (symtab->dump_file, t); | |
441 | fprintf (symtab->dump_file, " and "); | |
442 | print_generic_expr (symtab->dump_file, nonodr); | |
443 | fprintf (symtab->dump_file, " mangled:%s\n", | |
444 | IDENTIFIER_POINTER | |
445 | (DECL_ASSEMBLER_NAME (TYPE_NAME (t)))); | |
446 | } | |
447 | /* Set canonical for T and all other ODR equivalent duplicates | |
448 | including incomplete structures. */ | |
449 | set_type_canonical_for_odr_type (t, nonodr); | |
450 | } | |
451 | else | |
452 | { | |
453 | tree prevail = prevailing_odr_type (t); | |
454 | ||
455 | if (symtab->dump_file) | |
456 | { | |
457 | fprintf (symtab->dump_file, | |
458 | "New canonical ODR type: "); | |
459 | print_generic_expr (symtab->dump_file, t); | |
460 | fprintf (symtab->dump_file, " mangled:%s\n", | |
461 | IDENTIFIER_POINTER | |
462 | (DECL_ASSEMBLER_NAME (TYPE_NAME (t)))); | |
463 | } | |
464 | /* Set canonical for T and all other ODR equivalent duplicates | |
465 | including incomplete structures. */ | |
466 | set_type_canonical_for_odr_type (t, prevail); | |
467 | enable_odr_based_tbaa (t); | |
468 | if (!type_in_anonymous_namespace_p (t)) | |
469 | hash = htab_hash_string (IDENTIFIER_POINTER | |
470 | (DECL_ASSEMBLER_NAME | |
471 | (TYPE_NAME (t)))); | |
472 | else | |
473 | hash = TYPE_UID (t); | |
474 | ||
475 | /* All variants of t now have TYPE_CANONICAL set to prevail. | |
476 | Update canonical type hash cache accordingly. */ | |
477 | num_canonical_type_hash_entries++; | |
478 | bool existed_p = canonical_type_hash_cache->put (prevail, hash); | |
479 | gcc_checking_assert (!existed_p); | |
480 | } | |
481 | return hash; | |
482 | } | |
483 | ||
a79420f9 ML |
484 | slot = htab_find_slot_with_hash (gimple_canonical_types, t, hash, INSERT); |
485 | if (*slot) | |
486 | { | |
487 | tree new_type = (tree)(*slot); | |
488 | gcc_checking_assert (new_type != t); | |
489 | TYPE_CANONICAL (t) = new_type; | |
490 | } | |
491 | else | |
492 | { | |
493 | TYPE_CANONICAL (t) = t; | |
494 | *slot = (void *) t; | |
495 | /* Cache the just computed hash value. */ | |
496 | num_canonical_type_hash_entries++; | |
497 | bool existed_p = canonical_type_hash_cache->put (t, hash); | |
498 | gcc_assert (!existed_p); | |
499 | } | |
a0276c00 | 500 | return hash; |
a79420f9 ML |
501 | } |
502 | ||
503 | /* Register type T in the global type table gimple_types and set | |
504 | TYPE_CANONICAL of T accordingly. | |
505 | This is used by LTO to merge structurally equivalent types for | |
506 | type-based aliasing purposes across different TUs and languages. | |
507 | ||
e53b6e56 | 508 | ??? This merging does not exactly match how the tree.cc middle-end |
a79420f9 ML |
509 | functions will assign TYPE_CANONICAL when new types are created |
510 | during optimization (which at least happens for pointer and array | |
511 | types). */ | |
512 | ||
513 | static void | |
514 | gimple_register_canonical_type (tree t) | |
515 | { | |
516 | if (TYPE_CANONICAL (t) || !type_with_alias_set_p (t) | |
517 | || !canonical_type_used_p (t)) | |
518 | return; | |
519 | ||
520 | /* Canonical types are same among all complete variants. */ | |
521 | if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (t))) | |
522 | TYPE_CANONICAL (t) = TYPE_CANONICAL (TYPE_MAIN_VARIANT (t)); | |
523 | else | |
524 | { | |
ee7a003f ML |
525 | hashval_t h = hash_canonical_type (TYPE_MAIN_VARIANT (t)); |
526 | gimple_register_canonical_type_1 (TYPE_MAIN_VARIANT (t), h); | |
a79420f9 ML |
527 | TYPE_CANONICAL (t) = TYPE_CANONICAL (TYPE_MAIN_VARIANT (t)); |
528 | } | |
529 | } | |
530 | ||
531 | /* Re-compute TYPE_CANONICAL for NODE and related types. */ | |
532 | ||
533 | static void | |
534 | lto_register_canonical_types (tree node, bool first_p) | |
535 | { | |
536 | if (!node | |
537 | || !TYPE_P (node)) | |
538 | return; | |
539 | ||
540 | if (first_p) | |
541 | TYPE_CANONICAL (node) = NULL_TREE; | |
542 | ||
543 | if (POINTER_TYPE_P (node) | |
544 | || TREE_CODE (node) == COMPLEX_TYPE | |
545 | || TREE_CODE (node) == ARRAY_TYPE) | |
546 | lto_register_canonical_types (TREE_TYPE (node), first_p); | |
547 | ||
ee7a003f | 548 | if (!first_p) |
a79420f9 ML |
549 | gimple_register_canonical_type (node); |
550 | } | |
551 | ||
a0276c00 JH |
552 | /* Finish canonical type calculation: after all units has been streamed in we |
553 | can check if given ODR type structurally conflicts with a non-ODR type. In | |
554 | the first case we set type canonical according to the canonical type hash. | |
555 | In the second case we use type names. */ | |
556 | ||
557 | static void | |
558 | lto_register_canonical_types_for_odr_types () | |
559 | { | |
560 | tree t; | |
561 | unsigned int i; | |
562 | ||
563 | if (!types_to_register) | |
564 | return; | |
565 | ||
566 | type_streaming_finished = true; | |
567 | ||
568 | /* Be sure that no types derived from ODR types was | |
569 | not inserted into the hash table. */ | |
570 | if (flag_checking) | |
571 | FOR_EACH_VEC_ELT (*types_to_register, i, t) | |
572 | gcc_assert (!TYPE_CANONICAL (t)); | |
573 | ||
574 | /* Register all remaining types. */ | |
575 | FOR_EACH_VEC_ELT (*types_to_register, i, t) | |
606a9a8c JH |
576 | { |
577 | /* For pre-streamed types like va-arg it is possible that main variant | |
578 | is !CXX_ODR_P while the variant (which is streamed) is. | |
579 | Copy CXX_ODR_P to make type verifier happy. This is safe because | |
580 | in canonical type calculation we only consider main variants. | |
581 | However we can not change this flag before streaming is finished | |
582 | to not affect tree merging. */ | |
583 | TYPE_CXX_ODR_P (t) = TYPE_CXX_ODR_P (TYPE_MAIN_VARIANT (t)); | |
584 | if (!TYPE_CANONICAL (t)) | |
585 | gimple_register_canonical_type (t); | |
586 | } | |
a0276c00 JH |
587 | } |
588 | ||
a79420f9 ML |
589 | |
590 | /* Remember trees that contains references to declarations. */ | |
591 | vec <tree, va_gc> *tree_with_vars; | |
592 | ||
593 | #define CHECK_VAR(tt) \ | |
594 | do \ | |
595 | { \ | |
596 | if ((tt) && VAR_OR_FUNCTION_DECL_P (tt) \ | |
597 | && (TREE_PUBLIC (tt) || DECL_EXTERNAL (tt))) \ | |
598 | return true; \ | |
599 | } while (0) | |
600 | ||
601 | #define CHECK_NO_VAR(tt) \ | |
602 | gcc_checking_assert (!(tt) || !VAR_OR_FUNCTION_DECL_P (tt)) | |
603 | ||
604 | /* Check presence of pointers to decls in fields of a tree_typed T. */ | |
605 | ||
606 | static inline bool | |
607 | mentions_vars_p_typed (tree t) | |
608 | { | |
609 | CHECK_NO_VAR (TREE_TYPE (t)); | |
610 | return false; | |
611 | } | |
612 | ||
613 | /* Check presence of pointers to decls in fields of a tree_common T. */ | |
614 | ||
615 | static inline bool | |
616 | mentions_vars_p_common (tree t) | |
617 | { | |
618 | if (mentions_vars_p_typed (t)) | |
619 | return true; | |
620 | CHECK_NO_VAR (TREE_CHAIN (t)); | |
621 | return false; | |
622 | } | |
623 | ||
624 | /* Check presence of pointers to decls in fields of a decl_minimal T. */ | |
625 | ||
626 | static inline bool | |
627 | mentions_vars_p_decl_minimal (tree t) | |
628 | { | |
629 | if (mentions_vars_p_common (t)) | |
630 | return true; | |
631 | CHECK_NO_VAR (DECL_NAME (t)); | |
632 | CHECK_VAR (DECL_CONTEXT (t)); | |
633 | return false; | |
634 | } | |
635 | ||
636 | /* Check presence of pointers to decls in fields of a decl_common T. */ | |
637 | ||
638 | static inline bool | |
639 | mentions_vars_p_decl_common (tree t) | |
640 | { | |
641 | if (mentions_vars_p_decl_minimal (t)) | |
642 | return true; | |
643 | CHECK_VAR (DECL_SIZE (t)); | |
644 | CHECK_VAR (DECL_SIZE_UNIT (t)); | |
645 | CHECK_VAR (DECL_INITIAL (t)); | |
646 | CHECK_NO_VAR (DECL_ATTRIBUTES (t)); | |
647 | CHECK_VAR (DECL_ABSTRACT_ORIGIN (t)); | |
648 | return false; | |
649 | } | |
650 | ||
651 | /* Check presence of pointers to decls in fields of a decl_with_vis T. */ | |
652 | ||
653 | static inline bool | |
654 | mentions_vars_p_decl_with_vis (tree t) | |
655 | { | |
656 | if (mentions_vars_p_decl_common (t)) | |
657 | return true; | |
658 | ||
ee7a003f | 659 | /* Accessor macro has side-effects, use field-name here. */ |
a79420f9 ML |
660 | CHECK_NO_VAR (DECL_ASSEMBLER_NAME_RAW (t)); |
661 | return false; | |
662 | } | |
663 | ||
664 | /* Check presence of pointers to decls in fields of a decl_non_common T. */ | |
665 | ||
666 | static inline bool | |
667 | mentions_vars_p_decl_non_common (tree t) | |
668 | { | |
669 | if (mentions_vars_p_decl_with_vis (t)) | |
670 | return true; | |
671 | CHECK_NO_VAR (DECL_RESULT_FLD (t)); | |
672 | return false; | |
673 | } | |
674 | ||
675 | /* Check presence of pointers to decls in fields of a decl_non_common T. */ | |
676 | ||
677 | static bool | |
678 | mentions_vars_p_function (tree t) | |
679 | { | |
680 | if (mentions_vars_p_decl_non_common (t)) | |
681 | return true; | |
682 | CHECK_NO_VAR (DECL_ARGUMENTS (t)); | |
683 | CHECK_NO_VAR (DECL_VINDEX (t)); | |
684 | CHECK_VAR (DECL_FUNCTION_PERSONALITY (t)); | |
685 | return false; | |
686 | } | |
687 | ||
688 | /* Check presence of pointers to decls in fields of a field_decl T. */ | |
689 | ||
690 | static bool | |
691 | mentions_vars_p_field_decl (tree t) | |
692 | { | |
693 | if (mentions_vars_p_decl_common (t)) | |
694 | return true; | |
695 | CHECK_VAR (DECL_FIELD_OFFSET (t)); | |
696 | CHECK_NO_VAR (DECL_BIT_FIELD_TYPE (t)); | |
697 | CHECK_NO_VAR (DECL_QUALIFIER (t)); | |
698 | CHECK_NO_VAR (DECL_FIELD_BIT_OFFSET (t)); | |
699 | CHECK_NO_VAR (DECL_FCONTEXT (t)); | |
700 | return false; | |
701 | } | |
702 | ||
703 | /* Check presence of pointers to decls in fields of a type T. */ | |
704 | ||
705 | static bool | |
706 | mentions_vars_p_type (tree t) | |
707 | { | |
708 | if (mentions_vars_p_common (t)) | |
709 | return true; | |
710 | CHECK_NO_VAR (TYPE_CACHED_VALUES (t)); | |
711 | CHECK_VAR (TYPE_SIZE (t)); | |
712 | CHECK_VAR (TYPE_SIZE_UNIT (t)); | |
713 | CHECK_NO_VAR (TYPE_ATTRIBUTES (t)); | |
714 | CHECK_NO_VAR (TYPE_NAME (t)); | |
715 | ||
716 | CHECK_VAR (TYPE_MIN_VALUE_RAW (t)); | |
717 | CHECK_VAR (TYPE_MAX_VALUE_RAW (t)); | |
718 | ||
ee7a003f | 719 | /* Accessor is for derived node types only. */ |
a79420f9 ML |
720 | CHECK_NO_VAR (TYPE_LANG_SLOT_1 (t)); |
721 | ||
722 | CHECK_VAR (TYPE_CONTEXT (t)); | |
723 | CHECK_NO_VAR (TYPE_CANONICAL (t)); | |
724 | CHECK_NO_VAR (TYPE_MAIN_VARIANT (t)); | |
725 | CHECK_NO_VAR (TYPE_NEXT_VARIANT (t)); | |
726 | return false; | |
727 | } | |
728 | ||
729 | /* Check presence of pointers to decls in fields of a BINFO T. */ | |
730 | ||
731 | static bool | |
732 | mentions_vars_p_binfo (tree t) | |
733 | { | |
734 | unsigned HOST_WIDE_INT i, n; | |
735 | ||
736 | if (mentions_vars_p_common (t)) | |
737 | return true; | |
738 | CHECK_VAR (BINFO_VTABLE (t)); | |
739 | CHECK_NO_VAR (BINFO_OFFSET (t)); | |
740 | CHECK_NO_VAR (BINFO_VIRTUALS (t)); | |
741 | CHECK_NO_VAR (BINFO_VPTR_FIELD (t)); | |
742 | n = vec_safe_length (BINFO_BASE_ACCESSES (t)); | |
743 | for (i = 0; i < n; i++) | |
744 | CHECK_NO_VAR (BINFO_BASE_ACCESS (t, i)); | |
745 | /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX | |
746 | and BINFO_VPTR_INDEX; these are used by C++ FE only. */ | |
747 | n = BINFO_N_BASE_BINFOS (t); | |
748 | for (i = 0; i < n; i++) | |
749 | CHECK_NO_VAR (BINFO_BASE_BINFO (t, i)); | |
750 | return false; | |
751 | } | |
752 | ||
753 | /* Check presence of pointers to decls in fields of a CONSTRUCTOR T. */ | |
754 | ||
755 | static bool | |
756 | mentions_vars_p_constructor (tree t) | |
757 | { | |
758 | unsigned HOST_WIDE_INT idx; | |
759 | constructor_elt *ce; | |
760 | ||
761 | if (mentions_vars_p_typed (t)) | |
762 | return true; | |
763 | ||
764 | for (idx = 0; vec_safe_iterate (CONSTRUCTOR_ELTS (t), idx, &ce); idx++) | |
765 | { | |
766 | CHECK_NO_VAR (ce->index); | |
767 | CHECK_VAR (ce->value); | |
768 | } | |
769 | return false; | |
770 | } | |
771 | ||
772 | /* Check presence of pointers to decls in fields of an expression tree T. */ | |
773 | ||
774 | static bool | |
775 | mentions_vars_p_expr (tree t) | |
776 | { | |
777 | int i; | |
778 | if (mentions_vars_p_typed (t)) | |
779 | return true; | |
780 | for (i = TREE_OPERAND_LENGTH (t) - 1; i >= 0; --i) | |
781 | CHECK_VAR (TREE_OPERAND (t, i)); | |
782 | return false; | |
783 | } | |
784 | ||
785 | /* Check presence of pointers to decls in fields of an OMP_CLAUSE T. */ | |
786 | ||
787 | static bool | |
788 | mentions_vars_p_omp_clause (tree t) | |
789 | { | |
790 | int i; | |
791 | if (mentions_vars_p_common (t)) | |
792 | return true; | |
793 | for (i = omp_clause_num_ops[OMP_CLAUSE_CODE (t)] - 1; i >= 0; --i) | |
794 | CHECK_VAR (OMP_CLAUSE_OPERAND (t, i)); | |
795 | return false; | |
796 | } | |
797 | ||
798 | /* Check presence of pointers to decls that needs later fixup in T. */ | |
799 | ||
800 | static bool | |
801 | mentions_vars_p (tree t) | |
802 | { | |
803 | switch (TREE_CODE (t)) | |
804 | { | |
805 | case IDENTIFIER_NODE: | |
806 | break; | |
807 | ||
808 | case TREE_LIST: | |
809 | CHECK_VAR (TREE_VALUE (t)); | |
810 | CHECK_VAR (TREE_PURPOSE (t)); | |
811 | CHECK_NO_VAR (TREE_CHAIN (t)); | |
812 | break; | |
813 | ||
814 | case FIELD_DECL: | |
815 | return mentions_vars_p_field_decl (t); | |
816 | ||
817 | case LABEL_DECL: | |
818 | case CONST_DECL: | |
819 | case PARM_DECL: | |
820 | case RESULT_DECL: | |
821 | case IMPORTED_DECL: | |
822 | case NAMESPACE_DECL: | |
823 | case NAMELIST_DECL: | |
824 | return mentions_vars_p_decl_common (t); | |
825 | ||
826 | case VAR_DECL: | |
827 | return mentions_vars_p_decl_with_vis (t); | |
828 | ||
829 | case TYPE_DECL: | |
830 | return mentions_vars_p_decl_non_common (t); | |
831 | ||
832 | case FUNCTION_DECL: | |
833 | return mentions_vars_p_function (t); | |
834 | ||
835 | case TREE_BINFO: | |
836 | return mentions_vars_p_binfo (t); | |
837 | ||
838 | case PLACEHOLDER_EXPR: | |
839 | return mentions_vars_p_common (t); | |
840 | ||
841 | case BLOCK: | |
842 | case TRANSLATION_UNIT_DECL: | |
843 | case OPTIMIZATION_NODE: | |
844 | case TARGET_OPTION_NODE: | |
845 | break; | |
846 | ||
847 | case CONSTRUCTOR: | |
848 | return mentions_vars_p_constructor (t); | |
849 | ||
850 | case OMP_CLAUSE: | |
851 | return mentions_vars_p_omp_clause (t); | |
852 | ||
853 | default: | |
854 | if (TYPE_P (t)) | |
855 | { | |
856 | if (mentions_vars_p_type (t)) | |
857 | return true; | |
858 | } | |
859 | else if (EXPR_P (t)) | |
860 | { | |
861 | if (mentions_vars_p_expr (t)) | |
862 | return true; | |
863 | } | |
864 | else if (CONSTANT_CLASS_P (t)) | |
865 | CHECK_NO_VAR (TREE_TYPE (t)); | |
866 | else | |
867 | gcc_unreachable (); | |
868 | } | |
869 | return false; | |
870 | } | |
871 | ||
872 | ||
ee7a003f | 873 | /* Return the resolution for the decl with index INDEX from DATA_IN. */ |
a79420f9 ML |
874 | |
875 | static enum ld_plugin_symbol_resolution | |
99b1c316 | 876 | get_resolution (class data_in *data_in, unsigned index) |
a79420f9 ML |
877 | { |
878 | if (data_in->globals_resolution.exists ()) | |
879 | { | |
880 | ld_plugin_symbol_resolution_t ret; | |
881 | /* We can have references to not emitted functions in | |
882 | DECL_FUNCTION_PERSONALITY at least. So we can and have | |
ee7a003f | 883 | to indeed return LDPR_UNKNOWN in some cases. */ |
a79420f9 ML |
884 | if (data_in->globals_resolution.length () <= index) |
885 | return LDPR_UNKNOWN; | |
886 | ret = data_in->globals_resolution[index]; | |
887 | return ret; | |
888 | } | |
889 | else | |
890 | /* Delay resolution finding until decl merging. */ | |
891 | return LDPR_UNKNOWN; | |
892 | } | |
893 | ||
894 | /* We need to record resolutions until symbol table is read. */ | |
895 | static void | |
896 | register_resolution (struct lto_file_decl_data *file_data, tree decl, | |
897 | enum ld_plugin_symbol_resolution resolution) | |
898 | { | |
899 | bool existed; | |
900 | if (resolution == LDPR_UNKNOWN) | |
901 | return; | |
902 | if (!file_data->resolution_map) | |
903 | file_data->resolution_map | |
904 | = new hash_map<tree, ld_plugin_symbol_resolution>; | |
905 | ld_plugin_symbol_resolution_t &res | |
906 | = file_data->resolution_map->get_or_insert (decl, &existed); | |
907 | if (!existed | |
908 | || resolution == LDPR_PREVAILING_DEF_IRONLY | |
909 | || resolution == LDPR_PREVAILING_DEF | |
910 | || resolution == LDPR_PREVAILING_DEF_IRONLY_EXP) | |
911 | res = resolution; | |
912 | } | |
913 | ||
914 | /* Register DECL with the global symbol table and change its | |
915 | name if necessary to avoid name clashes for static globals across | |
916 | different files. */ | |
917 | ||
918 | static void | |
99b1c316 | 919 | lto_register_var_decl_in_symtab (class data_in *data_in, tree decl, |
a79420f9 ML |
920 | unsigned ix) |
921 | { | |
922 | tree context; | |
923 | ||
924 | /* Variable has file scope, not local. */ | |
925 | if (!TREE_PUBLIC (decl) | |
926 | && !((context = decl_function_context (decl)) | |
927 | && auto_var_in_fn_p (decl, context))) | |
928 | rest_of_decl_compilation (decl, 1, 0); | |
929 | ||
930 | /* If this variable has already been declared, queue the | |
931 | declaration for merging. */ | |
932 | if (TREE_PUBLIC (decl)) | |
933 | register_resolution (data_in->file_data, | |
934 | decl, get_resolution (data_in, ix)); | |
935 | } | |
936 | ||
937 | ||
938 | /* Register DECL with the global symbol table and change its | |
939 | name if necessary to avoid name clashes for static globals across | |
940 | different files. DATA_IN contains descriptors and tables for the | |
941 | file being read. */ | |
942 | ||
943 | static void | |
99b1c316 | 944 | lto_register_function_decl_in_symtab (class data_in *data_in, tree decl, |
a79420f9 ML |
945 | unsigned ix) |
946 | { | |
947 | /* If this variable has already been declared, queue the | |
948 | declaration for merging. */ | |
949 | if (TREE_PUBLIC (decl) && !DECL_ABSTRACT_P (decl)) | |
950 | register_resolution (data_in->file_data, | |
951 | decl, get_resolution (data_in, ix)); | |
952 | } | |
953 | ||
954 | /* Check if T is a decl and needs register its resolution info. */ | |
955 | ||
956 | static void | |
99b1c316 | 957 | lto_maybe_register_decl (class data_in *data_in, tree t, unsigned ix) |
a79420f9 | 958 | { |
f6a4d079 | 959 | if (VAR_P (t)) |
a79420f9 ML |
960 | lto_register_var_decl_in_symtab (data_in, t, ix); |
961 | else if (TREE_CODE (t) == FUNCTION_DECL | |
962 | && !fndecl_built_in_p (t)) | |
963 | lto_register_function_decl_in_symtab (data_in, t, ix); | |
964 | } | |
965 | ||
966 | ||
967 | /* For the type T re-materialize it in the type variant list and | |
968 | the pointer/reference-to chains. */ | |
969 | ||
970 | static void | |
971 | lto_fixup_prevailing_type (tree t) | |
972 | { | |
973 | /* The following re-creates proper variant lists while fixing up | |
974 | the variant leaders. We do not stream TYPE_NEXT_VARIANT so the | |
975 | variant list state before fixup is broken. */ | |
976 | ||
977 | /* If we are not our own variant leader link us into our new leaders | |
978 | variant list. */ | |
979 | if (TYPE_MAIN_VARIANT (t) != t) | |
980 | { | |
981 | tree mv = TYPE_MAIN_VARIANT (t); | |
982 | TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (mv); | |
983 | TYPE_NEXT_VARIANT (mv) = t; | |
984 | } | |
9b4f7004 | 985 | else if (!TYPE_ATTRIBUTES (t)) |
a79420f9 | 986 | { |
9b4f7004 JJ |
987 | /* The following reconstructs the pointer chains |
988 | of the new pointed-to type if we are a main variant. We do | |
989 | not stream those so they are broken before fixup. | |
990 | Don't add it if despite being main variant it has | |
991 | attributes (then it was created with build_distinct_type_copy). | |
992 | Similarly don't add TYPE_REF_IS_RVALUE REFERENCE_TYPEs. | |
993 | Don't add it if there is something in the chain already. */ | |
994 | if (TREE_CODE (t) == POINTER_TYPE) | |
995 | { | |
996 | TYPE_NEXT_PTR_TO (t) = TYPE_POINTER_TO (TREE_TYPE (t)); | |
997 | TYPE_POINTER_TO (TREE_TYPE (t)) = t; | |
998 | } | |
999 | else if (TREE_CODE (t) == REFERENCE_TYPE && !TYPE_REF_IS_RVALUE (t)) | |
1000 | { | |
1001 | TYPE_NEXT_REF_TO (t) = TYPE_REFERENCE_TO (TREE_TYPE (t)); | |
1002 | TYPE_REFERENCE_TO (TREE_TYPE (t)) = t; | |
1003 | } | |
a79420f9 ML |
1004 | } |
1005 | } | |
1006 | ||
1007 | ||
1008 | /* We keep prevailing tree SCCs in a hashtable with manual collision | |
1009 | handling (in case all hashes compare the same) and keep the colliding | |
1010 | entries in the tree_scc->next chain. */ | |
1011 | ||
1012 | struct tree_scc | |
1013 | { | |
1014 | tree_scc *next; | |
1015 | /* Hash of the whole SCC. */ | |
1016 | hashval_t hash; | |
1017 | /* Number of trees in the SCC. */ | |
1018 | unsigned len; | |
1019 | /* Number of possible entries into the SCC (tree nodes [0..entry_len-1] | |
1020 | which share the same individual tree hash). */ | |
1021 | unsigned entry_len; | |
1022 | /* The members of the SCC. | |
1023 | We only need to remember the first entry node candidate for prevailing | |
1024 | SCCs (but of course have access to all entries for SCCs we are | |
1025 | processing). | |
1026 | ??? For prevailing SCCs we really only need hash and the first | |
1027 | entry candidate, but that's too awkward to implement. */ | |
1028 | tree entries[1]; | |
1029 | }; | |
1030 | ||
1031 | struct tree_scc_hasher : nofree_ptr_hash <tree_scc> | |
1032 | { | |
1033 | static inline hashval_t hash (const tree_scc *); | |
1034 | static inline bool equal (const tree_scc *, const tree_scc *); | |
1035 | }; | |
1036 | ||
1037 | hashval_t | |
1038 | tree_scc_hasher::hash (const tree_scc *scc) | |
1039 | { | |
1040 | return scc->hash; | |
1041 | } | |
1042 | ||
1043 | bool | |
1044 | tree_scc_hasher::equal (const tree_scc *scc1, const tree_scc *scc2) | |
1045 | { | |
1046 | if (scc1->hash != scc2->hash | |
1047 | || scc1->len != scc2->len | |
1048 | || scc1->entry_len != scc2->entry_len) | |
1049 | return false; | |
1050 | return true; | |
1051 | } | |
1052 | ||
1053 | static hash_table<tree_scc_hasher> *tree_scc_hash; | |
1054 | static struct obstack tree_scc_hash_obstack; | |
1055 | ||
1056 | static unsigned long num_merged_types; | |
1057 | static unsigned long num_prevailing_types; | |
1058 | static unsigned long num_type_scc_trees; | |
1059 | static unsigned long total_scc_size; | |
1060 | static unsigned long num_sccs_read; | |
03d90a20 | 1061 | static unsigned long num_unshared_trees_read; |
a79420f9 ML |
1062 | static unsigned long total_scc_size_merged; |
1063 | static unsigned long num_sccs_merged; | |
1064 | static unsigned long num_scc_compares; | |
1065 | static unsigned long num_scc_compare_collisions; | |
1066 | ||
1067 | ||
1068 | /* Compare the two entries T1 and T2 of two SCCs that are possibly equal, | |
1069 | recursing through in-SCC tree edges. Returns true if the SCCs entered | |
1070 | through T1 and T2 are equal and fills in *MAP with the pairs of | |
1071 | SCC entries we visited, starting with (*MAP)[0] = T1 and (*MAP)[1] = T2. */ | |
1072 | ||
1073 | static bool | |
1074 | compare_tree_sccs_1 (tree t1, tree t2, tree **map) | |
1075 | { | |
1076 | enum tree_code code; | |
1077 | ||
1078 | /* Mark already visited nodes. */ | |
1079 | TREE_ASM_WRITTEN (t2) = 1; | |
1080 | ||
1081 | /* Push the pair onto map. */ | |
1082 | (*map)[0] = t1; | |
1083 | (*map)[1] = t2; | |
1084 | *map = *map + 2; | |
1085 | ||
1086 | /* Compare value-fields. */ | |
1087 | #define compare_values(X) \ | |
1088 | do { \ | |
1089 | if (X(t1) != X(t2)) \ | |
1090 | return false; \ | |
1091 | } while (0) | |
1092 | ||
1093 | compare_values (TREE_CODE); | |
1094 | code = TREE_CODE (t1); | |
1095 | ||
03d90a20 JH |
1096 | /* If we end up comparing translation unit decls we either forgot to mark |
1097 | some SCC as local or we compare too much. */ | |
1098 | gcc_checking_assert (code != TRANSLATION_UNIT_DECL); | |
1099 | ||
a79420f9 ML |
1100 | if (!TYPE_P (t1)) |
1101 | { | |
1102 | compare_values (TREE_SIDE_EFFECTS); | |
1103 | compare_values (TREE_CONSTANT); | |
1104 | compare_values (TREE_READONLY); | |
1105 | compare_values (TREE_PUBLIC); | |
1106 | } | |
1107 | compare_values (TREE_ADDRESSABLE); | |
1108 | compare_values (TREE_THIS_VOLATILE); | |
1109 | if (DECL_P (t1)) | |
1110 | compare_values (DECL_UNSIGNED); | |
1111 | else if (TYPE_P (t1)) | |
1112 | compare_values (TYPE_UNSIGNED); | |
1113 | if (TYPE_P (t1)) | |
1114 | compare_values (TYPE_ARTIFICIAL); | |
1115 | else | |
1116 | compare_values (TREE_NO_WARNING); | |
1117 | compare_values (TREE_NOTHROW); | |
1118 | compare_values (TREE_STATIC); | |
1119 | if (code != TREE_BINFO) | |
1120 | compare_values (TREE_PRIVATE); | |
1121 | compare_values (TREE_PROTECTED); | |
1122 | compare_values (TREE_DEPRECATED); | |
1123 | if (TYPE_P (t1)) | |
1124 | { | |
1125 | if (AGGREGATE_TYPE_P (t1)) | |
1126 | compare_values (TYPE_REVERSE_STORAGE_ORDER); | |
1127 | else | |
1128 | compare_values (TYPE_SATURATING); | |
1129 | compare_values (TYPE_ADDR_SPACE); | |
1130 | } | |
1131 | else if (code == SSA_NAME) | |
1132 | compare_values (SSA_NAME_IS_DEFAULT_DEF); | |
1133 | ||
1134 | if (CODE_CONTAINS_STRUCT (code, TS_INT_CST)) | |
1135 | { | |
1136 | if (wi::to_wide (t1) != wi::to_wide (t2)) | |
1137 | return false; | |
1138 | } | |
1139 | ||
1140 | if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST)) | |
1141 | { | |
1142 | /* ??? No suitable compare routine available. */ | |
1143 | REAL_VALUE_TYPE r1 = TREE_REAL_CST (t1); | |
1144 | REAL_VALUE_TYPE r2 = TREE_REAL_CST (t2); | |
1145 | if (r1.cl != r2.cl | |
1146 | || r1.decimal != r2.decimal | |
1147 | || r1.sign != r2.sign | |
1148 | || r1.signalling != r2.signalling | |
1149 | || r1.canonical != r2.canonical | |
1150 | || r1.uexp != r2.uexp) | |
1151 | return false; | |
1152 | for (unsigned i = 0; i < SIGSZ; ++i) | |
1153 | if (r1.sig[i] != r2.sig[i]) | |
1154 | return false; | |
1155 | } | |
1156 | ||
1157 | if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST)) | |
1158 | if (!fixed_compare (EQ_EXPR, | |
1159 | TREE_FIXED_CST_PTR (t1), TREE_FIXED_CST_PTR (t2))) | |
1160 | return false; | |
1161 | ||
1162 | if (CODE_CONTAINS_STRUCT (code, TS_VECTOR)) | |
1163 | { | |
1164 | compare_values (VECTOR_CST_LOG2_NPATTERNS); | |
1165 | compare_values (VECTOR_CST_NELTS_PER_PATTERN); | |
1166 | } | |
1167 | ||
1168 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON)) | |
1169 | { | |
1170 | compare_values (DECL_MODE); | |
1171 | compare_values (DECL_NONLOCAL); | |
1172 | compare_values (DECL_VIRTUAL_P); | |
1173 | compare_values (DECL_IGNORED_P); | |
1174 | compare_values (DECL_ABSTRACT_P); | |
1175 | compare_values (DECL_ARTIFICIAL); | |
1176 | compare_values (DECL_USER_ALIGN); | |
1177 | compare_values (DECL_PRESERVE_P); | |
1178 | compare_values (DECL_EXTERNAL); | |
eb72dc66 | 1179 | compare_values (DECL_NOT_GIMPLE_REG_P); |
a79420f9 ML |
1180 | compare_values (DECL_ALIGN); |
1181 | if (code == LABEL_DECL) | |
1182 | { | |
1183 | compare_values (EH_LANDING_PAD_NR); | |
1184 | compare_values (LABEL_DECL_UID); | |
1185 | } | |
1186 | else if (code == FIELD_DECL) | |
1187 | { | |
1188 | compare_values (DECL_PACKED); | |
1189 | compare_values (DECL_NONADDRESSABLE_P); | |
1190 | compare_values (DECL_PADDING_P); | |
575ac27f | 1191 | compare_values (DECL_FIELD_ABI_IGNORED); |
e902136b | 1192 | compare_values (DECL_FIELD_CXX_ZERO_WIDTH_BIT_FIELD); |
a79420f9 | 1193 | compare_values (DECL_OFFSET_ALIGN); |
924033e3 | 1194 | compare_values (DECL_NOT_FLEXARRAY); |
a79420f9 ML |
1195 | } |
1196 | else if (code == VAR_DECL) | |
1197 | { | |
1198 | compare_values (DECL_HAS_DEBUG_EXPR_P); | |
1199 | compare_values (DECL_NONLOCAL_FRAME); | |
1200 | } | |
1201 | if (code == RESULT_DECL | |
1202 | || code == PARM_DECL | |
1203 | || code == VAR_DECL) | |
1204 | { | |
1205 | compare_values (DECL_BY_REFERENCE); | |
1206 | if (code == VAR_DECL | |
1207 | || code == PARM_DECL) | |
1208 | compare_values (DECL_HAS_VALUE_EXPR_P); | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL)) | |
1213 | compare_values (DECL_REGISTER); | |
1214 | ||
1215 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS)) | |
1216 | { | |
1217 | compare_values (DECL_COMMON); | |
1218 | compare_values (DECL_DLLIMPORT_P); | |
1219 | compare_values (DECL_WEAK); | |
1220 | compare_values (DECL_SEEN_IN_BIND_EXPR_P); | |
1221 | compare_values (DECL_COMDAT); | |
1222 | compare_values (DECL_VISIBILITY); | |
1223 | compare_values (DECL_VISIBILITY_SPECIFIED); | |
1224 | if (code == VAR_DECL) | |
1225 | { | |
1226 | compare_values (DECL_HARD_REGISTER); | |
ee7a003f | 1227 | /* DECL_IN_TEXT_SECTION is set during final asm output only. */ |
a79420f9 ML |
1228 | compare_values (DECL_IN_CONSTANT_POOL); |
1229 | } | |
1230 | } | |
1231 | ||
1232 | if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL)) | |
1233 | { | |
1234 | compare_values (DECL_BUILT_IN_CLASS); | |
1235 | compare_values (DECL_STATIC_CONSTRUCTOR); | |
1236 | compare_values (DECL_STATIC_DESTRUCTOR); | |
1237 | compare_values (DECL_UNINLINABLE); | |
1238 | compare_values (DECL_POSSIBLY_INLINED); | |
1239 | compare_values (DECL_IS_NOVOPS); | |
1240 | compare_values (DECL_IS_RETURNS_TWICE); | |
1241 | compare_values (DECL_IS_MALLOC); | |
21d7bba2 | 1242 | compare_values (FUNCTION_DECL_DECL_TYPE); |
a79420f9 ML |
1243 | compare_values (DECL_DECLARED_INLINE_P); |
1244 | compare_values (DECL_STATIC_CHAIN); | |
1245 | compare_values (DECL_NO_INLINE_WARNING_P); | |
1246 | compare_values (DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT); | |
1247 | compare_values (DECL_NO_LIMIT_STACK); | |
1248 | compare_values (DECL_DISREGARD_INLINE_LIMITS); | |
1249 | compare_values (DECL_PURE_P); | |
1250 | compare_values (DECL_LOOPING_CONST_OR_PURE_P); | |
70df40ca | 1251 | compare_values (DECL_IS_REPLACEABLE_OPERATOR); |
a79420f9 ML |
1252 | compare_values (DECL_FINAL_P); |
1253 | compare_values (DECL_CXX_CONSTRUCTOR_P); | |
1254 | compare_values (DECL_CXX_DESTRUCTOR_P); | |
1255 | if (DECL_BUILT_IN_CLASS (t1) != NOT_BUILT_IN) | |
4d732405 | 1256 | compare_values (DECL_UNCHECKED_FUNCTION_CODE); |
a79420f9 ML |
1257 | } |
1258 | ||
1259 | if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON)) | |
1260 | { | |
1261 | compare_values (TYPE_MODE); | |
a79420f9 ML |
1262 | compare_values (TYPE_NEEDS_CONSTRUCTING); |
1263 | if (RECORD_OR_UNION_TYPE_P (t1)) | |
1264 | { | |
1265 | compare_values (TYPE_TRANSPARENT_AGGR); | |
1266 | compare_values (TYPE_FINAL_P); | |
f4af4019 | 1267 | compare_values (TYPE_CXX_ODR_P); |
a79420f9 ML |
1268 | } |
1269 | else if (code == ARRAY_TYPE) | |
1270 | compare_values (TYPE_NONALIASED_COMPONENT); | |
f4af4019 JH |
1271 | if (code == ARRAY_TYPE || code == INTEGER_TYPE) |
1272 | compare_values (TYPE_STRING_FLAG); | |
a79420f9 ML |
1273 | if (AGGREGATE_TYPE_P (t1)) |
1274 | compare_values (TYPE_TYPELESS_STORAGE); | |
1275 | compare_values (TYPE_EMPTY_P); | |
3967da96 QZ |
1276 | if (FUNC_OR_METHOD_TYPE_P (t1)) |
1277 | compare_values (TYPE_NO_NAMED_ARGS_STDARG_P); | |
1278 | if (RECORD_OR_UNION_TYPE_P (t1)) | |
1279 | compare_values (TYPE_INCLUDES_FLEXARRAY); | |
a79420f9 ML |
1280 | compare_values (TYPE_PACKED); |
1281 | compare_values (TYPE_RESTRICT); | |
1282 | compare_values (TYPE_USER_ALIGN); | |
1283 | compare_values (TYPE_READONLY); | |
fe48f265 | 1284 | compare_values (TYPE_PRECISION_RAW); |
a79420f9 ML |
1285 | compare_values (TYPE_ALIGN); |
1286 | /* Do not compare TYPE_ALIAS_SET. Doing so introduce ordering issues | |
ee7a003f ML |
1287 | with calls to get_alias_set which may initialize it for streamed |
1288 | in types. */ | |
a79420f9 ML |
1289 | } |
1290 | ||
1291 | /* We don't want to compare locations, so there is nothing do compare | |
1292 | for TS_EXP. */ | |
1293 | ||
1294 | /* BLOCKs are function local and we don't merge anything there, so | |
1295 | simply refuse to merge. */ | |
1296 | if (CODE_CONTAINS_STRUCT (code, TS_BLOCK)) | |
1297 | return false; | |
1298 | ||
1299 | if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL)) | |
1300 | if (strcmp (TRANSLATION_UNIT_LANGUAGE (t1), | |
1301 | TRANSLATION_UNIT_LANGUAGE (t2)) != 0) | |
1302 | return false; | |
1303 | ||
1304 | if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION)) | |
1305 | if (!cl_target_option_eq (TREE_TARGET_OPTION (t1), TREE_TARGET_OPTION (t2))) | |
1306 | return false; | |
1307 | ||
1308 | if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION)) | |
1309 | if (!cl_optimization_option_eq (TREE_OPTIMIZATION (t1), | |
1310 | TREE_OPTIMIZATION (t2))) | |
1311 | return false; | |
1312 | ||
1313 | if (CODE_CONTAINS_STRUCT (code, TS_BINFO)) | |
1314 | if (vec_safe_length (BINFO_BASE_ACCESSES (t1)) | |
1315 | != vec_safe_length (BINFO_BASE_ACCESSES (t2))) | |
1316 | return false; | |
1317 | ||
1318 | if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR)) | |
551aa757 RB |
1319 | { |
1320 | compare_values (CLOBBER_KIND); | |
1321 | compare_values (CONSTRUCTOR_NELTS); | |
1322 | } | |
a79420f9 ML |
1323 | |
1324 | if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER)) | |
1325 | if (IDENTIFIER_LENGTH (t1) != IDENTIFIER_LENGTH (t2) | |
1326 | || memcmp (IDENTIFIER_POINTER (t1), IDENTIFIER_POINTER (t2), | |
1327 | IDENTIFIER_LENGTH (t1)) != 0) | |
1328 | return false; | |
1329 | ||
1330 | if (CODE_CONTAINS_STRUCT (code, TS_STRING)) | |
1331 | if (TREE_STRING_LENGTH (t1) != TREE_STRING_LENGTH (t2) | |
1332 | || memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2), | |
1333 | TREE_STRING_LENGTH (t1)) != 0) | |
1334 | return false; | |
1335 | ||
1336 | if (code == OMP_CLAUSE) | |
1337 | { | |
1338 | compare_values (OMP_CLAUSE_CODE); | |
1339 | switch (OMP_CLAUSE_CODE (t1)) | |
1340 | { | |
1341 | case OMP_CLAUSE_DEFAULT: | |
1342 | compare_values (OMP_CLAUSE_DEFAULT_KIND); | |
1343 | break; | |
1344 | case OMP_CLAUSE_SCHEDULE: | |
1345 | compare_values (OMP_CLAUSE_SCHEDULE_KIND); | |
1346 | break; | |
1347 | case OMP_CLAUSE_DEPEND: | |
1348 | compare_values (OMP_CLAUSE_DEPEND_KIND); | |
1349 | break; | |
1350 | case OMP_CLAUSE_MAP: | |
1351 | compare_values (OMP_CLAUSE_MAP_KIND); | |
1352 | break; | |
1353 | case OMP_CLAUSE_PROC_BIND: | |
1354 | compare_values (OMP_CLAUSE_PROC_BIND_KIND); | |
1355 | break; | |
1356 | case OMP_CLAUSE_REDUCTION: | |
1357 | compare_values (OMP_CLAUSE_REDUCTION_CODE); | |
1358 | compare_values (OMP_CLAUSE_REDUCTION_GIMPLE_INIT); | |
1359 | compare_values (OMP_CLAUSE_REDUCTION_GIMPLE_MERGE); | |
1360 | break; | |
1361 | default: | |
1362 | break; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | #undef compare_values | |
1367 | ||
1368 | ||
1369 | /* Compare pointer fields. */ | |
1370 | ||
1371 | /* Recurse. Search & Replaced from DFS_write_tree_body. | |
1372 | Folding the early checks into the compare_tree_edges recursion | |
1373 | macro makes debugging way quicker as you are able to break on | |
1374 | compare_tree_sccs_1 and simply finish until a call returns false | |
1375 | to spot the SCC members with the difference. */ | |
1376 | #define compare_tree_edges(E1, E2) \ | |
1377 | do { \ | |
1378 | tree t1_ = (E1), t2_ = (E2); \ | |
1379 | if (t1_ != t2_ \ | |
1380 | && (!t1_ || !t2_ \ | |
1381 | || !TREE_VISITED (t2_) \ | |
1382 | || (!TREE_ASM_WRITTEN (t2_) \ | |
1383 | && !compare_tree_sccs_1 (t1_, t2_, map)))) \ | |
1384 | return false; \ | |
1385 | /* Only non-NULL trees outside of the SCC may compare equal. */ \ | |
1386 | gcc_checking_assert (t1_ != t2_ || (!t2_ || !TREE_VISITED (t2_))); \ | |
1387 | } while (0) | |
1388 | ||
1389 | if (CODE_CONTAINS_STRUCT (code, TS_TYPED)) | |
1390 | { | |
1391 | if (code != IDENTIFIER_NODE) | |
1392 | compare_tree_edges (TREE_TYPE (t1), TREE_TYPE (t2)); | |
1393 | } | |
1394 | ||
1395 | if (CODE_CONTAINS_STRUCT (code, TS_VECTOR)) | |
1396 | { | |
1397 | /* Note that the number of elements for EXPR has already been emitted | |
1398 | in EXPR's header (see streamer_write_tree_header). */ | |
1399 | unsigned int count = vector_cst_encoded_nelts (t1); | |
1400 | for (unsigned int i = 0; i < count; ++i) | |
1401 | compare_tree_edges (VECTOR_CST_ENCODED_ELT (t1, i), | |
1402 | VECTOR_CST_ENCODED_ELT (t2, i)); | |
1403 | } | |
1404 | ||
1405 | if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX)) | |
1406 | { | |
1407 | compare_tree_edges (TREE_REALPART (t1), TREE_REALPART (t2)); | |
1408 | compare_tree_edges (TREE_IMAGPART (t1), TREE_IMAGPART (t2)); | |
1409 | } | |
1410 | ||
1411 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL)) | |
1412 | { | |
1413 | compare_tree_edges (DECL_NAME (t1), DECL_NAME (t2)); | |
1414 | /* ??? Global decls from different TUs have non-matching | |
1415 | TRANSLATION_UNIT_DECLs. Only consider a small set of | |
1416 | decls equivalent, we should not end up merging others. */ | |
1417 | if ((code == TYPE_DECL | |
1418 | || code == NAMESPACE_DECL | |
1419 | || code == IMPORTED_DECL | |
1420 | || code == CONST_DECL | |
1421 | || (VAR_OR_FUNCTION_DECL_P (t1) | |
1422 | && (TREE_PUBLIC (t1) || DECL_EXTERNAL (t1)))) | |
1423 | && DECL_FILE_SCOPE_P (t1) && DECL_FILE_SCOPE_P (t2)) | |
1424 | ; | |
1425 | else | |
1426 | compare_tree_edges (DECL_CONTEXT (t1), DECL_CONTEXT (t2)); | |
1427 | } | |
1428 | ||
1429 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON)) | |
1430 | { | |
1431 | compare_tree_edges (DECL_SIZE (t1), DECL_SIZE (t2)); | |
1432 | compare_tree_edges (DECL_SIZE_UNIT (t1), DECL_SIZE_UNIT (t2)); | |
1433 | compare_tree_edges (DECL_ATTRIBUTES (t1), DECL_ATTRIBUTES (t2)); | |
1434 | compare_tree_edges (DECL_ABSTRACT_ORIGIN (t1), DECL_ABSTRACT_ORIGIN (t2)); | |
1435 | if ((code == VAR_DECL | |
1436 | || code == PARM_DECL) | |
1437 | && DECL_HAS_VALUE_EXPR_P (t1)) | |
1438 | compare_tree_edges (DECL_VALUE_EXPR (t1), DECL_VALUE_EXPR (t2)); | |
1439 | if (code == VAR_DECL | |
1440 | && DECL_HAS_DEBUG_EXPR_P (t1)) | |
1441 | compare_tree_edges (DECL_DEBUG_EXPR (t1), DECL_DEBUG_EXPR (t2)); | |
1442 | /* LTO specific edges. */ | |
1443 | if (code != FUNCTION_DECL | |
1444 | && code != TRANSLATION_UNIT_DECL) | |
1445 | compare_tree_edges (DECL_INITIAL (t1), DECL_INITIAL (t2)); | |
1446 | } | |
1447 | ||
1448 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON)) | |
1449 | { | |
1450 | if (code == FUNCTION_DECL) | |
1451 | { | |
1452 | tree a1, a2; | |
1453 | for (a1 = DECL_ARGUMENTS (t1), a2 = DECL_ARGUMENTS (t2); | |
1454 | a1 || a2; | |
1455 | a1 = TREE_CHAIN (a1), a2 = TREE_CHAIN (a2)) | |
1456 | compare_tree_edges (a1, a2); | |
1457 | compare_tree_edges (DECL_RESULT (t1), DECL_RESULT (t2)); | |
1458 | } | |
1459 | else if (code == TYPE_DECL) | |
1460 | compare_tree_edges (DECL_ORIGINAL_TYPE (t1), DECL_ORIGINAL_TYPE (t2)); | |
1461 | } | |
1462 | ||
1463 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS)) | |
1464 | { | |
1465 | /* Make sure we don't inadvertently set the assembler name. */ | |
1466 | if (DECL_ASSEMBLER_NAME_SET_P (t1)) | |
1467 | compare_tree_edges (DECL_ASSEMBLER_NAME (t1), | |
1468 | DECL_ASSEMBLER_NAME (t2)); | |
1469 | } | |
1470 | ||
1471 | if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL)) | |
1472 | { | |
1473 | compare_tree_edges (DECL_FIELD_OFFSET (t1), DECL_FIELD_OFFSET (t2)); | |
1474 | compare_tree_edges (DECL_BIT_FIELD_TYPE (t1), DECL_BIT_FIELD_TYPE (t2)); | |
1475 | compare_tree_edges (DECL_BIT_FIELD_REPRESENTATIVE (t1), | |
1476 | DECL_BIT_FIELD_REPRESENTATIVE (t2)); | |
1477 | compare_tree_edges (DECL_FIELD_BIT_OFFSET (t1), | |
1478 | DECL_FIELD_BIT_OFFSET (t2)); | |
1479 | compare_tree_edges (DECL_FCONTEXT (t1), DECL_FCONTEXT (t2)); | |
1480 | } | |
1481 | ||
1482 | if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL)) | |
1483 | { | |
1484 | compare_tree_edges (DECL_FUNCTION_PERSONALITY (t1), | |
1485 | DECL_FUNCTION_PERSONALITY (t2)); | |
1486 | compare_tree_edges (DECL_VINDEX (t1), DECL_VINDEX (t2)); | |
1487 | compare_tree_edges (DECL_FUNCTION_SPECIFIC_TARGET (t1), | |
1488 | DECL_FUNCTION_SPECIFIC_TARGET (t2)); | |
1489 | compare_tree_edges (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (t1), | |
1490 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (t2)); | |
1491 | } | |
1492 | ||
1493 | if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON)) | |
1494 | { | |
1495 | compare_tree_edges (TYPE_SIZE (t1), TYPE_SIZE (t2)); | |
1496 | compare_tree_edges (TYPE_SIZE_UNIT (t1), TYPE_SIZE_UNIT (t2)); | |
1497 | compare_tree_edges (TYPE_ATTRIBUTES (t1), TYPE_ATTRIBUTES (t2)); | |
1498 | compare_tree_edges (TYPE_NAME (t1), TYPE_NAME (t2)); | |
1499 | /* Do not compare TYPE_POINTER_TO or TYPE_REFERENCE_TO. They will be | |
1500 | reconstructed during fixup. */ | |
1501 | /* Do not compare TYPE_NEXT_VARIANT, we reconstruct the variant lists | |
1502 | during fixup. */ | |
1503 | compare_tree_edges (TYPE_MAIN_VARIANT (t1), TYPE_MAIN_VARIANT (t2)); | |
1504 | /* ??? Global types from different TUs have non-matching | |
1505 | TRANSLATION_UNIT_DECLs. Still merge them if they are otherwise | |
1506 | equal. */ | |
1507 | if (TYPE_FILE_SCOPE_P (t1) && TYPE_FILE_SCOPE_P (t2)) | |
1508 | ; | |
1509 | else | |
1510 | compare_tree_edges (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2)); | |
1511 | /* TYPE_CANONICAL is re-computed during type merging, so do not | |
1512 | compare it here. */ | |
1513 | compare_tree_edges (TYPE_STUB_DECL (t1), TYPE_STUB_DECL (t2)); | |
1514 | } | |
1515 | ||
1516 | if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON)) | |
1517 | { | |
3fb68f2e | 1518 | if (code == ARRAY_TYPE) |
a79420f9 ML |
1519 | compare_tree_edges (TYPE_DOMAIN (t1), TYPE_DOMAIN (t2)); |
1520 | else if (RECORD_OR_UNION_TYPE_P (t1)) | |
1521 | { | |
1522 | tree f1, f2; | |
1523 | for (f1 = TYPE_FIELDS (t1), f2 = TYPE_FIELDS (t2); | |
1524 | f1 || f2; | |
1525 | f1 = TREE_CHAIN (f1), f2 = TREE_CHAIN (f2)) | |
1526 | compare_tree_edges (f1, f2); | |
1527 | } | |
1528 | else if (code == FUNCTION_TYPE | |
1529 | || code == METHOD_TYPE) | |
1530 | compare_tree_edges (TYPE_ARG_TYPES (t1), TYPE_ARG_TYPES (t2)); | |
1531 | ||
1532 | if (!POINTER_TYPE_P (t1)) | |
1533 | compare_tree_edges (TYPE_MIN_VALUE_RAW (t1), TYPE_MIN_VALUE_RAW (t2)); | |
1534 | compare_tree_edges (TYPE_MAX_VALUE_RAW (t1), TYPE_MAX_VALUE_RAW (t2)); | |
1535 | } | |
1536 | ||
1537 | if (CODE_CONTAINS_STRUCT (code, TS_LIST)) | |
1538 | { | |
1539 | compare_tree_edges (TREE_PURPOSE (t1), TREE_PURPOSE (t2)); | |
1540 | compare_tree_edges (TREE_VALUE (t1), TREE_VALUE (t2)); | |
1541 | compare_tree_edges (TREE_CHAIN (t1), TREE_CHAIN (t2)); | |
1542 | } | |
1543 | ||
1544 | if (CODE_CONTAINS_STRUCT (code, TS_VEC)) | |
1545 | for (int i = 0; i < TREE_VEC_LENGTH (t1); i++) | |
1546 | compare_tree_edges (TREE_VEC_ELT (t1, i), TREE_VEC_ELT (t2, i)); | |
1547 | ||
1548 | if (CODE_CONTAINS_STRUCT (code, TS_EXP)) | |
1549 | { | |
1550 | for (int i = 0; i < TREE_OPERAND_LENGTH (t1); i++) | |
1551 | compare_tree_edges (TREE_OPERAND (t1, i), | |
1552 | TREE_OPERAND (t2, i)); | |
1553 | ||
1554 | /* BLOCKs are function local and we don't merge anything there. */ | |
1555 | if (TREE_BLOCK (t1) || TREE_BLOCK (t2)) | |
1556 | return false; | |
1557 | } | |
1558 | ||
1559 | if (CODE_CONTAINS_STRUCT (code, TS_BINFO)) | |
1560 | { | |
1561 | unsigned i; | |
1562 | tree t; | |
1563 | /* Lengths have already been compared above. */ | |
1564 | FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (t1), i, t) | |
1565 | compare_tree_edges (t, BINFO_BASE_BINFO (t2, i)); | |
1566 | FOR_EACH_VEC_SAFE_ELT (BINFO_BASE_ACCESSES (t1), i, t) | |
1567 | compare_tree_edges (t, BINFO_BASE_ACCESS (t2, i)); | |
1568 | compare_tree_edges (BINFO_OFFSET (t1), BINFO_OFFSET (t2)); | |
1569 | compare_tree_edges (BINFO_VTABLE (t1), BINFO_VTABLE (t2)); | |
1570 | compare_tree_edges (BINFO_VPTR_FIELD (t1), BINFO_VPTR_FIELD (t2)); | |
1571 | /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX | |
1572 | and BINFO_VPTR_INDEX; these are used by C++ FE only. */ | |
1573 | } | |
1574 | ||
1575 | if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR)) | |
1576 | { | |
1577 | unsigned i; | |
1578 | tree index, value; | |
1579 | /* Lengths have already been compared above. */ | |
1580 | FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t1), i, index, value) | |
1581 | { | |
1582 | compare_tree_edges (index, CONSTRUCTOR_ELT (t2, i)->index); | |
1583 | compare_tree_edges (value, CONSTRUCTOR_ELT (t2, i)->value); | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | if (code == OMP_CLAUSE) | |
1588 | { | |
1589 | int i; | |
1590 | ||
1591 | for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (t1)]; i++) | |
1592 | compare_tree_edges (OMP_CLAUSE_OPERAND (t1, i), | |
1593 | OMP_CLAUSE_OPERAND (t2, i)); | |
1594 | compare_tree_edges (OMP_CLAUSE_CHAIN (t1), OMP_CLAUSE_CHAIN (t2)); | |
1595 | } | |
1596 | ||
1597 | #undef compare_tree_edges | |
1598 | ||
1599 | return true; | |
1600 | } | |
1601 | ||
1602 | /* Compare the tree scc SCC to the prevailing candidate PSCC, filling | |
1603 | out MAP if they are equal. */ | |
1604 | ||
1605 | static bool | |
1606 | compare_tree_sccs (tree_scc *pscc, tree_scc *scc, | |
1607 | tree *map) | |
1608 | { | |
1609 | /* Assume SCC entry hashes are sorted after their cardinality. Which | |
1610 | means we can simply take the first n-tuple of equal hashes | |
1611 | (which is recorded as entry_len) and do n SCC entry candidate | |
1612 | comparisons. */ | |
1613 | for (unsigned i = 0; i < pscc->entry_len; ++i) | |
1614 | { | |
1615 | tree *mapp = map; | |
1616 | num_scc_compare_collisions++; | |
1617 | if (compare_tree_sccs_1 (pscc->entries[0], scc->entries[i], &mapp)) | |
1618 | { | |
1619 | /* Equal - no need to reset TREE_VISITED or TREE_ASM_WRITTEN | |
1620 | on the scc as all trees will be freed. */ | |
1621 | return true; | |
1622 | } | |
1623 | /* Reset TREE_ASM_WRITTEN on scc for the next compare or in case | |
ee7a003f | 1624 | the SCC prevails. */ |
a79420f9 ML |
1625 | for (unsigned j = 0; j < scc->len; ++j) |
1626 | TREE_ASM_WRITTEN (scc->entries[j]) = 0; | |
1627 | } | |
1628 | ||
1629 | return false; | |
1630 | } | |
1631 | ||
1632 | /* QSort sort function to sort a map of two pointers after the 2nd | |
1633 | pointer. */ | |
1634 | ||
1635 | static int | |
1636 | cmp_tree (const void *p1_, const void *p2_) | |
1637 | { | |
1638 | tree *p1 = (tree *)(const_cast<void *>(p1_)); | |
1639 | tree *p2 = (tree *)(const_cast<void *>(p2_)); | |
1640 | if (p1[1] == p2[1]) | |
1641 | return 0; | |
1642 | return ((uintptr_t)p1[1] < (uintptr_t)p2[1]) ? -1 : 1; | |
1643 | } | |
1644 | ||
03d90a20 JH |
1645 | /* New scc of size 1 containing T was streamed in from DATA_IN and not merged. |
1646 | Register it to reader cache at index FROM. */ | |
1647 | ||
1648 | static void | |
1649 | process_dref (class data_in *data_in, tree t, unsigned from) | |
1650 | { | |
1651 | struct streamer_tree_cache_d *cache = data_in->reader_cache; | |
1652 | /* If we got a debug reference queued, see if the prevailing | |
1653 | tree has a debug reference and if not, register the one | |
1654 | for the tree we are about to throw away. */ | |
1655 | if (dref_queue.length () == 1) | |
1656 | { | |
1657 | dref_entry e = dref_queue.pop (); | |
1658 | gcc_assert (e.decl | |
1659 | == streamer_tree_cache_get_tree (cache, from)); | |
1660 | const char *sym; | |
1661 | unsigned HOST_WIDE_INT off; | |
1662 | if (!debug_hooks->die_ref_for_decl (t, &sym, &off)) | |
1663 | debug_hooks->register_external_die (t, e.sym, e.off); | |
1664 | } | |
1665 | } | |
1666 | ||
a79420f9 ML |
1667 | /* Try to unify the SCC with nodes FROM to FROM + LEN in CACHE and |
1668 | hash value SCC_HASH with an already recorded SCC. Return true if | |
1669 | that was successful, otherwise return false. */ | |
1670 | ||
1671 | static bool | |
99b1c316 | 1672 | unify_scc (class data_in *data_in, unsigned from, |
a79420f9 ML |
1673 | unsigned len, unsigned scc_entry_len, hashval_t scc_hash) |
1674 | { | |
1675 | bool unified_p = false; | |
1676 | struct streamer_tree_cache_d *cache = data_in->reader_cache; | |
1677 | tree_scc *scc | |
1678 | = (tree_scc *) alloca (sizeof (tree_scc) + (len - 1) * sizeof (tree)); | |
1679 | scc->next = NULL; | |
1680 | scc->hash = scc_hash; | |
1681 | scc->len = len; | |
1682 | scc->entry_len = scc_entry_len; | |
1683 | for (unsigned i = 0; i < len; ++i) | |
1684 | { | |
1685 | tree t = streamer_tree_cache_get_tree (cache, from + i); | |
1686 | scc->entries[i] = t; | |
03d90a20 JH |
1687 | /* These types should be streamed as unshared. */ |
1688 | gcc_checking_assert | |
1689 | (!(TREE_CODE (t) == TRANSLATION_UNIT_DECL | |
1690 | || (VAR_OR_FUNCTION_DECL_P (t) | |
1691 | && !(TREE_PUBLIC (t) || DECL_EXTERNAL (t))) | |
1692 | || TREE_CODE (t) == LABEL_DECL | |
1693 | || (TREE_CODE (t) == NAMESPACE_DECL && !DECL_NAME (t)) | |
1694 | || (TYPE_P (t) | |
1695 | && type_with_linkage_p (TYPE_MAIN_VARIANT (t)) | |
1696 | && type_in_anonymous_namespace_p (TYPE_MAIN_VARIANT (t))))); | |
a79420f9 ML |
1697 | } |
1698 | ||
1699 | /* Look for the list of candidate SCCs to compare against. */ | |
1700 | tree_scc **slot; | |
1701 | slot = tree_scc_hash->find_slot_with_hash (scc, scc_hash, INSERT); | |
1702 | if (*slot) | |
1703 | { | |
1704 | /* Try unifying against each candidate. */ | |
1705 | num_scc_compares++; | |
1706 | ||
1707 | /* Set TREE_VISITED on the scc so we can easily identify tree nodes | |
1708 | outside of the scc when following tree edges. Make sure | |
1709 | that TREE_ASM_WRITTEN is unset so we can use it as 2nd bit | |
1710 | to track whether we visited the SCC member during the compare. | |
1711 | We cannot use TREE_VISITED on the pscc members as the extended | |
1712 | scc and pscc can overlap. */ | |
1713 | for (unsigned i = 0; i < scc->len; ++i) | |
1714 | { | |
1715 | TREE_VISITED (scc->entries[i]) = 1; | |
1716 | gcc_checking_assert (!TREE_ASM_WRITTEN (scc->entries[i])); | |
1717 | } | |
1718 | ||
1719 | tree *map = XALLOCAVEC (tree, 2 * len); | |
1720 | for (tree_scc *pscc = *slot; pscc; pscc = pscc->next) | |
1721 | { | |
1722 | if (!compare_tree_sccs (pscc, scc, map)) | |
1723 | continue; | |
1724 | ||
1725 | /* Found an equal SCC. */ | |
1726 | unified_p = true; | |
1727 | num_scc_compare_collisions--; | |
1728 | num_sccs_merged++; | |
1729 | total_scc_size_merged += len; | |
1730 | ||
1731 | if (flag_checking) | |
1732 | for (unsigned i = 0; i < len; ++i) | |
1733 | { | |
1734 | tree t = map[2*i+1]; | |
1735 | enum tree_code code = TREE_CODE (t); | |
1736 | /* IDENTIFIER_NODEs should be singletons and are merged by the | |
1737 | streamer. The others should be singletons, too, and we | |
1738 | should not merge them in any way. */ | |
1739 | gcc_assert (code != TRANSLATION_UNIT_DECL | |
1740 | && code != IDENTIFIER_NODE); | |
1741 | } | |
1742 | ||
1743 | /* Fixup the streamer cache with the prevailing nodes according | |
1744 | to the tree node mapping computed by compare_tree_sccs. */ | |
1745 | if (len == 1) | |
1746 | { | |
03d90a20 | 1747 | process_dref (data_in, pscc->entries[0], from); |
a79420f9 ML |
1748 | lto_maybe_register_decl (data_in, pscc->entries[0], from); |
1749 | streamer_tree_cache_replace_tree (cache, pscc->entries[0], from); | |
1750 | } | |
1751 | else | |
1752 | { | |
1753 | tree *map2 = XALLOCAVEC (tree, 2 * len); | |
1754 | for (unsigned i = 0; i < len; ++i) | |
1755 | { | |
1756 | map2[i*2] = (tree)(uintptr_t)(from + i); | |
1757 | map2[i*2+1] = scc->entries[i]; | |
1758 | } | |
1759 | qsort (map2, len, 2 * sizeof (tree), cmp_tree); | |
1760 | qsort (map, len, 2 * sizeof (tree), cmp_tree); | |
1761 | for (unsigned i = 0; i < len; ++i) | |
1762 | { | |
1763 | lto_maybe_register_decl (data_in, map[2*i], | |
1764 | (uintptr_t)map2[2*i]); | |
1765 | streamer_tree_cache_replace_tree (cache, map[2*i], | |
1766 | (uintptr_t)map2[2*i]); | |
1767 | } | |
1768 | } | |
1769 | ||
1770 | /* Free the tree nodes from the read SCC. */ | |
1771 | data_in->location_cache.revert_location_cache (); | |
1772 | for (unsigned i = 0; i < len; ++i) | |
1773 | { | |
1774 | if (TYPE_P (scc->entries[i])) | |
1775 | num_merged_types++; | |
1776 | free_node (scc->entries[i]); | |
1777 | } | |
1778 | ||
1779 | /* Drop DIE references. | |
1780 | ??? Do as in the size-one SCC case which involves sorting | |
1781 | the queue. */ | |
1782 | dref_queue.truncate (0); | |
1783 | ||
1784 | break; | |
1785 | } | |
1786 | ||
1787 | /* Reset TREE_VISITED if we didn't unify the SCC with another. */ | |
1788 | if (!unified_p) | |
1789 | for (unsigned i = 0; i < scc->len; ++i) | |
1790 | TREE_VISITED (scc->entries[i]) = 0; | |
1791 | } | |
1792 | ||
1793 | /* If we didn't unify it to any candidate duplicate the relevant | |
1794 | pieces to permanent storage and link it into the chain. */ | |
1795 | if (!unified_p) | |
1796 | { | |
1797 | tree_scc *pscc | |
1798 | = XOBNEWVAR (&tree_scc_hash_obstack, tree_scc, sizeof (tree_scc)); | |
1799 | memcpy (pscc, scc, sizeof (tree_scc)); | |
1800 | pscc->next = (*slot); | |
1801 | *slot = pscc; | |
1802 | } | |
1803 | return unified_p; | |
1804 | } | |
1805 | ||
03d90a20 | 1806 | typedef int_hash<unsigned, 0, UINT_MAX> code_id_hash; |
a79420f9 | 1807 | |
03d90a20 JH |
1808 | /* Do registering necessary once new tree fully streamed in (including all |
1809 | trees it reffers to). */ | |
1810 | ||
1811 | static void | |
1812 | process_new_tree (tree t, hash_map <code_id_hash, unsigned> *hm, | |
1813 | unsigned index, unsigned *total, class data_in *data_in) | |
1814 | { | |
1815 | /* Reconstruct the type variant and pointer-to/reference-to | |
1816 | chains. */ | |
1817 | if (TYPE_P (t)) | |
1818 | { | |
1819 | /* Map the tree types to their frequencies. */ | |
1820 | if (flag_lto_dump_type_stats) | |
1821 | { | |
1822 | unsigned key = (unsigned) TREE_CODE (t); | |
1823 | unsigned *countp = hm->get (key); | |
1824 | hm->put (key, countp ? (*countp) + 1 : 1); | |
1825 | (*total)++; | |
1826 | } | |
1827 | ||
1828 | num_prevailing_types++; | |
1829 | lto_fixup_prevailing_type (t); | |
1830 | ||
1831 | /* Compute the canonical type of all non-ODR types. | |
1832 | Delay ODR types for the end of merging process - the canonical | |
1833 | type for those can be computed using the (unique) name however | |
1834 | we want to do this only if units in other languages do not | |
1835 | contain structurally equivalent type. | |
1836 | ||
1837 | Because SCC components are streamed in random (hash) order | |
1838 | we may have encountered the type before while registering | |
1839 | type canonical of a derived type in the same SCC. */ | |
1840 | if (!TYPE_CANONICAL (t)) | |
1841 | { | |
1842 | if (!RECORD_OR_UNION_TYPE_P (t) | |
1843 | || !TYPE_CXX_ODR_P (t)) | |
1844 | gimple_register_canonical_type (t); | |
1845 | else if (COMPLETE_TYPE_P (t)) | |
1846 | vec_safe_push (types_to_register, t); | |
1847 | } | |
1848 | if (TYPE_MAIN_VARIANT (t) == t && odr_type_p (t)) | |
1849 | register_odr_type (t); | |
1850 | } | |
1851 | /* Link shared INTEGER_CSTs into TYPE_CACHED_VALUEs of its | |
1852 | type which is also member of this SCC. */ | |
1853 | if (TREE_CODE (t) == INTEGER_CST | |
1854 | && !TREE_OVERFLOW (t)) | |
1855 | cache_integer_cst (t); | |
1856 | if (!flag_ltrans) | |
1857 | { | |
1858 | lto_maybe_register_decl (data_in, t, index); | |
1859 | /* Scan the tree for references to global functions or | |
1860 | variables and record those for later fixup. */ | |
1861 | if (mentions_vars_p (t)) | |
1862 | vec_safe_push (tree_with_vars, t); | |
1863 | } | |
1864 | } | |
a0276c00 | 1865 | |
a79420f9 ML |
1866 | /* Read all the symbols from buffer DATA, using descriptors in DECL_DATA. |
1867 | RESOLUTIONS is the set of symbols picked by the linker (read from the | |
1868 | resolution file when the linker plugin is being used). */ | |
1869 | ||
1870 | static void | |
1871 | lto_read_decls (struct lto_file_decl_data *decl_data, const void *data, | |
1872 | vec<ld_plugin_symbol_resolution_t> resolutions) | |
1873 | { | |
1874 | const struct lto_decl_header *header = (const struct lto_decl_header *) data; | |
1875 | const int decl_offset = sizeof (struct lto_decl_header); | |
1876 | const int main_offset = decl_offset + header->decl_state_size; | |
1877 | const int string_offset = main_offset + header->main_size; | |
99b1c316 | 1878 | class data_in *data_in; |
a79420f9 ML |
1879 | unsigned int i; |
1880 | const uint32_t *data_ptr, *data_end; | |
1881 | uint32_t num_decl_states; | |
1882 | ||
1883 | lto_input_block ib_main ((const char *) data + main_offset, | |
d7faf7a5 | 1884 | header->main_size, decl_data); |
a79420f9 ML |
1885 | |
1886 | data_in = lto_data_in_create (decl_data, (const char *) data + string_offset, | |
1887 | header->string_size, resolutions); | |
1888 | ||
1889 | /* We do not uniquify the pre-loaded cache entries, those are middle-end | |
1890 | internal types that should not be merged. */ | |
1891 | ||
66d62d9f HK |
1892 | hash_map <code_id_hash, unsigned> hm; |
1893 | unsigned total = 0; | |
1894 | ||
a79420f9 ML |
1895 | /* Read the global declarations and types. */ |
1896 | while (ib_main.p < ib_main.len) | |
1897 | { | |
1898 | tree t; | |
1899 | unsigned from = data_in->reader_cache->nodes.length (); | |
1900 | /* Read and uniquify SCCs as in the input stream. */ | |
1901 | enum LTO_tags tag = streamer_read_record_start (&ib_main); | |
03d90a20 | 1902 | if (tag == LTO_tree_scc || tag == LTO_trees) |
a79420f9 ML |
1903 | { |
1904 | unsigned len_; | |
1905 | unsigned scc_entry_len; | |
03d90a20 JH |
1906 | |
1907 | /* Because we stream in SCC order we know that all unshared trees | |
1908 | are now fully streamed. Process them. */ | |
a79420f9 | 1909 | hashval_t scc_hash = lto_input_scc (&ib_main, data_in, &len_, |
03d90a20 JH |
1910 | &scc_entry_len, |
1911 | tag == LTO_tree_scc); | |
a79420f9 ML |
1912 | unsigned len = data_in->reader_cache->nodes.length () - from; |
1913 | gcc_assert (len == len_); | |
1914 | ||
03d90a20 JH |
1915 | if (tag == LTO_tree_scc) |
1916 | { | |
1917 | total_scc_size += len; | |
1918 | num_sccs_read++; | |
1919 | } | |
1920 | else | |
1921 | num_unshared_trees_read += len; | |
a79420f9 ML |
1922 | |
1923 | /* We have the special case of size-1 SCCs that are pre-merged | |
1924 | by means of identifier and string sharing for example. | |
1925 | ??? Maybe we should avoid streaming those as SCCs. */ | |
1926 | tree first = streamer_tree_cache_get_tree (data_in->reader_cache, | |
1927 | from); | |
03d90a20 JH |
1928 | /* Identifier and integers are shared specially, they should never |
1929 | go by the tree merging path. */ | |
1930 | gcc_checking_assert ((TREE_CODE (first) != IDENTIFIER_NODE | |
1931 | && (TREE_CODE (first) != INTEGER_CST | |
1932 | || TREE_OVERFLOW (first))) | |
1933 | || len != 1); | |
a79420f9 ML |
1934 | |
1935 | /* Try to unify the SCC with already existing ones. */ | |
03d90a20 | 1936 | if (!flag_ltrans && tag != LTO_trees |
a79420f9 ML |
1937 | && unify_scc (data_in, from, |
1938 | len, scc_entry_len, scc_hash)) | |
1939 | continue; | |
1940 | ||
1941 | /* Tree merging failed, mark entries in location cache as | |
1942 | permanent. */ | |
1943 | data_in->location_cache.accept_location_cache (); | |
1944 | ||
1945 | bool seen_type = false; | |
1946 | for (unsigned i = 0; i < len; ++i) | |
1947 | { | |
1948 | tree t = streamer_tree_cache_get_tree (data_in->reader_cache, | |
1949 | from + i); | |
03d90a20 | 1950 | process_new_tree (t, &hm, from + i, &total, data_in); |
a79420f9 | 1951 | if (TYPE_P (t)) |
03d90a20 | 1952 | seen_type = true; |
a79420f9 ML |
1953 | } |
1954 | ||
1955 | /* Register DECLs with the debuginfo machinery. */ | |
1956 | while (!dref_queue.is_empty ()) | |
1957 | { | |
1958 | dref_entry e = dref_queue.pop (); | |
1959 | debug_hooks->register_external_die (e.decl, e.sym, e.off); | |
1960 | } | |
1961 | ||
1962 | if (seen_type) | |
1963 | num_type_scc_trees += len; | |
1964 | } | |
1965 | else | |
1966 | { | |
a79420f9 | 1967 | t = lto_input_tree_1 (&ib_main, data_in, tag, 0); |
bcb63eb2 JH |
1968 | gcc_assert (data_in->reader_cache->nodes.length () == from + 1); |
1969 | num_unshared_trees_read++; | |
1970 | data_in->location_cache.accept_location_cache (); | |
1971 | process_dref (data_in, t, from); | |
1972 | if (TREE_CODE (t) == IDENTIFIER_NODE | |
1973 | || (TREE_CODE (t) == INTEGER_CST | |
1974 | && !TREE_OVERFLOW (t))) | |
1975 | ; | |
1976 | else | |
03d90a20 | 1977 | { |
bcb63eb2 JH |
1978 | lto_maybe_register_decl (data_in, t, from); |
1979 | process_new_tree (t, &hm, from, &total, data_in); | |
03d90a20 | 1980 | } |
a79420f9 ML |
1981 | } |
1982 | } | |
66d62d9f HK |
1983 | |
1984 | /* Dump type statistics. */ | |
1985 | if (flag_lto_dump_type_stats) | |
1986 | { | |
1987 | fprintf (stdout, " Type Frequency Percentage\n\n"); | |
1988 | for (hash_map<code_id_hash, unsigned>::iterator itr = hm.begin (); | |
1989 | itr != hm.end (); | |
1990 | ++itr) | |
1991 | { | |
1992 | std::pair<unsigned, unsigned> p = *itr; | |
1993 | enum tree_code code = (enum tree_code) p.first; | |
1994 | fprintf (stdout, "%14s %6d %12.2f\n", get_tree_code_name (code), | |
1995 | p.second, float (p.second)/total*100); | |
1996 | } | |
1997 | } | |
1998 | ||
a79420f9 ML |
1999 | data_in->location_cache.apply_location_cache (); |
2000 | ||
2001 | /* Read in lto_in_decl_state objects. */ | |
ee7a003f ML |
2002 | data_ptr = (const uint32_t *) ((const char*) data + decl_offset); |
2003 | data_end | |
2004 | = (const uint32_t *) ((const char*) data_ptr + header->decl_state_size); | |
a79420f9 | 2005 | num_decl_states = *data_ptr++; |
ee7a003f | 2006 | |
a79420f9 ML |
2007 | gcc_assert (num_decl_states > 0); |
2008 | decl_data->global_decl_state = lto_new_in_decl_state (); | |
2009 | data_ptr = lto_read_in_decl_state (data_in, data_ptr, | |
2010 | decl_data->global_decl_state); | |
2011 | ||
2012 | /* Read in per-function decl states and enter them in hash table. */ | |
ee7a003f ML |
2013 | decl_data->function_decl_states |
2014 | = hash_table<decl_state_hasher>::create_ggc (37); | |
a79420f9 ML |
2015 | |
2016 | for (i = 1; i < num_decl_states; i++) | |
2017 | { | |
2018 | struct lto_in_decl_state *state = lto_new_in_decl_state (); | |
2019 | ||
2020 | data_ptr = lto_read_in_decl_state (data_in, data_ptr, state); | |
2021 | lto_in_decl_state **slot | |
2022 | = decl_data->function_decl_states->find_slot (state, INSERT); | |
2023 | gcc_assert (*slot == NULL); | |
2024 | *slot = state; | |
2025 | } | |
2026 | ||
2027 | if (data_ptr != data_end) | |
2028 | internal_error ("bytecode stream: garbage at the end of symbols section"); | |
2029 | ||
ee7a003f | 2030 | /* Set the current decl state to be the global state. */ |
a79420f9 ML |
2031 | decl_data->current_decl_state = decl_data->global_decl_state; |
2032 | ||
2033 | lto_data_in_delete (data_in); | |
2034 | } | |
2035 | ||
2036 | /* Custom version of strtoll, which is not portable. */ | |
2037 | ||
2038 | static int64_t | |
2039 | lto_parse_hex (const char *p) | |
2040 | { | |
2041 | int64_t ret = 0; | |
2042 | ||
2043 | for (; *p != '\0'; ++p) | |
2044 | { | |
2045 | char c = *p; | |
2046 | unsigned char part; | |
2047 | ret <<= 4; | |
2048 | if (c >= '0' && c <= '9') | |
ee7a003f | 2049 | part = c - '0'; |
a79420f9 | 2050 | else if (c >= 'a' && c <= 'f') |
ee7a003f | 2051 | part = c - 'a' + 10; |
a79420f9 | 2052 | else if (c >= 'A' && c <= 'F') |
ee7a003f | 2053 | part = c - 'A' + 10; |
a79420f9 | 2054 | else |
ee7a003f | 2055 | internal_error ("could not parse hex number"); |
a79420f9 ML |
2056 | ret |= part; |
2057 | } | |
2058 | ||
2059 | return ret; | |
2060 | } | |
2061 | ||
ee7a003f ML |
2062 | /* Read resolution for file named FILE_NAME. The resolution is read from |
2063 | RESOLUTION. */ | |
a79420f9 ML |
2064 | |
2065 | static void | |
2066 | lto_resolution_read (splay_tree file_ids, FILE *resolution, lto_file *file) | |
2067 | { | |
2068 | /* We require that objects in the resolution file are in the same | |
ee7a003f | 2069 | order as the lto1 command line. */ |
a79420f9 ML |
2070 | unsigned int name_len; |
2071 | char *obj_name; | |
2072 | unsigned int num_symbols; | |
2073 | unsigned int i; | |
2074 | struct lto_file_decl_data *file_data; | |
ee7a003f | 2075 | splay_tree_node nd = NULL; |
a79420f9 ML |
2076 | |
2077 | if (!resolution) | |
2078 | return; | |
2079 | ||
2080 | name_len = strlen (file->filename); | |
2081 | obj_name = XNEWVEC (char, name_len + 1); | |
ee7a003f | 2082 | fscanf (resolution, " "); /* Read white space. */ |
a79420f9 ML |
2083 | |
2084 | fread (obj_name, sizeof (char), name_len, resolution); | |
2085 | obj_name[name_len] = '\0'; | |
2086 | if (filename_cmp (obj_name, file->filename) != 0) | |
2087 | internal_error ("unexpected file name %s in linker resolution file. " | |
2088 | "Expected %s", obj_name, file->filename); | |
2089 | if (file->offset != 0) | |
2090 | { | |
2091 | int t; | |
2092 | char offset_p[17]; | |
2093 | int64_t offset; | |
2094 | t = fscanf (resolution, "@0x%16s", offset_p); | |
2095 | if (t != 1) | |
ee7a003f | 2096 | internal_error ("could not parse file offset"); |
a79420f9 ML |
2097 | offset = lto_parse_hex (offset_p); |
2098 | if (offset != file->offset) | |
ee7a003f | 2099 | internal_error ("unexpected offset"); |
a79420f9 ML |
2100 | } |
2101 | ||
2102 | free (obj_name); | |
2103 | ||
2104 | fscanf (resolution, "%u", &num_symbols); | |
2105 | ||
2106 | for (i = 0; i < num_symbols; i++) | |
2107 | { | |
2108 | int t; | |
2109 | unsigned index; | |
2110 | unsigned HOST_WIDE_INT id; | |
2111 | char r_str[27]; | |
2112 | enum ld_plugin_symbol_resolution r = (enum ld_plugin_symbol_resolution) 0; | |
2113 | unsigned int j; | |
ca32b29e | 2114 | unsigned int lto_resolution_str_len = ARRAY_SIZE (lto_resolution_str); |
a79420f9 ML |
2115 | res_pair rp; |
2116 | ||
ee7a003f ML |
2117 | t = fscanf (resolution, "%u " HOST_WIDE_INT_PRINT_HEX_PURE |
2118 | " %26s %*[^\n]\n", &index, &id, r_str); | |
a79420f9 | 2119 | if (t != 3) |
ee7a003f | 2120 | internal_error ("invalid line in the resolution file"); |
a79420f9 ML |
2121 | |
2122 | for (j = 0; j < lto_resolution_str_len; j++) | |
2123 | { | |
2124 | if (strcmp (lto_resolution_str[j], r_str) == 0) | |
2125 | { | |
2126 | r = (enum ld_plugin_symbol_resolution) j; | |
39ebd3a9 JH |
2127 | /* Incremental linking together with -fwhole-program may seem |
2128 | somewhat contradictionary (as the point of incremental linking | |
2129 | is to allow re-linking with more symbols later) but it is | |
2130 | used to build LTO kernel. We want to hide all symbols that | |
2131 | are not explicitely marked as exported and thus turn | |
2132 | LDPR_PREVAILING_DEF_IRONLY_EXP | |
2133 | to LDPR_PREVAILING_DEF_IRONLY. */ | |
2134 | if (flag_whole_program | |
2135 | && flag_incremental_link == INCREMENTAL_LINK_NOLTO | |
2136 | && r == LDPR_PREVAILING_DEF_IRONLY_EXP) | |
2137 | r = LDPR_PREVAILING_DEF_IRONLY; | |
a79420f9 ML |
2138 | break; |
2139 | } | |
2140 | } | |
2141 | if (j == lto_resolution_str_len) | |
2142 | internal_error ("invalid resolution in the resolution file"); | |
2143 | ||
2144 | if (!(nd && lto_splay_tree_id_equal_p (nd->key, id))) | |
2145 | { | |
2146 | nd = lto_splay_tree_lookup (file_ids, id); | |
2147 | if (nd == NULL) | |
2148 | internal_error ("resolution sub id %wx not in object file", id); | |
2149 | } | |
2150 | ||
2151 | file_data = (struct lto_file_decl_data *)nd->value; | |
ee7a003f ML |
2152 | /* The indexes are very sparse. To save memory save them in a compact |
2153 | format that is only unpacked later when the subfile is processed. */ | |
a79420f9 ML |
2154 | rp.res = r; |
2155 | rp.index = index; | |
2156 | file_data->respairs.safe_push (rp); | |
2157 | if (file_data->max_index < index) | |
ee7a003f | 2158 | file_data->max_index = index; |
a79420f9 ML |
2159 | } |
2160 | } | |
2161 | ||
ee7a003f | 2162 | /* List of file_decl_datas. */ |
a79420f9 | 2163 | struct file_data_list |
ee7a003f ML |
2164 | { |
2165 | struct lto_file_decl_data *first, *last; | |
2166 | }; | |
a79420f9 ML |
2167 | |
2168 | /* Is the name for a id'ed LTO section? */ | |
2169 | ||
ee7a003f | 2170 | static int |
a79420f9 ML |
2171 | lto_section_with_id (const char *name, unsigned HOST_WIDE_INT *id) |
2172 | { | |
2173 | const char *s; | |
2174 | ||
2175 | if (strncmp (name, section_name_prefix, strlen (section_name_prefix))) | |
2176 | return 0; | |
2177 | s = strrchr (name, '.'); | |
2178 | if (!s) | |
2179 | return 0; | |
2180 | /* If the section is not suffixed with an ID return. */ | |
2181 | if ((size_t)(s - name) == strlen (section_name_prefix)) | |
2182 | return 0; | |
2183 | return sscanf (s, "." HOST_WIDE_INT_PRINT_HEX_PURE, id) == 1; | |
2184 | } | |
2185 | ||
ee7a003f | 2186 | /* Create file_data of each sub file id. */ |
a79420f9 | 2187 | |
ee7a003f | 2188 | static int |
a79420f9 | 2189 | create_subid_section_table (struct lto_section_slot *ls, splay_tree file_ids, |
ee7a003f | 2190 | struct file_data_list *list) |
a79420f9 ML |
2191 | { |
2192 | struct lto_section_slot s_slot, *new_slot; | |
2193 | unsigned HOST_WIDE_INT id; | |
2194 | splay_tree_node nd; | |
2195 | void **hash_slot; | |
2196 | char *new_name; | |
2197 | struct lto_file_decl_data *file_data; | |
2198 | ||
2199 | if (!lto_section_with_id (ls->name, &id)) | |
2200 | return 1; | |
ee7a003f ML |
2201 | |
2202 | /* Find hash table of sub module id. */ | |
a79420f9 ML |
2203 | nd = lto_splay_tree_lookup (file_ids, id); |
2204 | if (nd != NULL) | |
2205 | { | |
2206 | file_data = (struct lto_file_decl_data *)nd->value; | |
2207 | } | |
2208 | else | |
2209 | { | |
2210 | file_data = ggc_alloc<lto_file_decl_data> (); | |
2211 | memset(file_data, 0, sizeof (struct lto_file_decl_data)); | |
2212 | file_data->id = id; | |
2213 | file_data->section_hash_table = lto_obj_create_section_hash_table (); | |
2214 | lto_splay_tree_insert (file_ids, id, file_data); | |
2215 | ||
ee7a003f | 2216 | /* Maintain list in linker order. */ |
a79420f9 | 2217 | if (!list->first) |
ee7a003f | 2218 | list->first = file_data; |
a79420f9 | 2219 | if (list->last) |
ee7a003f ML |
2220 | list->last->next = file_data; |
2221 | ||
a79420f9 ML |
2222 | list->last = file_data; |
2223 | } | |
2224 | ||
ee7a003f | 2225 | /* Copy section into sub module hash table. */ |
a79420f9 ML |
2226 | new_name = XDUPVEC (char, ls->name, strlen (ls->name) + 1); |
2227 | s_slot.name = new_name; | |
2228 | hash_slot = htab_find_slot (file_data->section_hash_table, &s_slot, INSERT); | |
2229 | gcc_assert (*hash_slot == NULL); | |
2230 | ||
2231 | new_slot = XDUP (struct lto_section_slot, ls); | |
2232 | new_slot->name = new_name; | |
2233 | *hash_slot = new_slot; | |
2234 | return 1; | |
2235 | } | |
2236 | ||
ee7a003f | 2237 | /* Read declarations and other initializations for a FILE_DATA. */ |
a79420f9 ML |
2238 | |
2239 | static void | |
ebad2eee JH |
2240 | lto_file_finalize (struct lto_file_decl_data *file_data, lto_file *file, |
2241 | int order) | |
a79420f9 ML |
2242 | { |
2243 | const char *data; | |
2244 | size_t len; | |
2245 | vec<ld_plugin_symbol_resolution_t> | |
2246 | resolutions = vNULL; | |
2247 | int i; | |
2248 | res_pair *rp; | |
2249 | ||
ee7a003f ML |
2250 | /* Create vector for fast access of resolution. We do this lazily |
2251 | to save memory. */ | |
cb3874dc | 2252 | resolutions.safe_grow_cleared (file_data->max_index + 1, true); |
a79420f9 ML |
2253 | for (i = 0; file_data->respairs.iterate (i, &rp); i++) |
2254 | resolutions[rp->index] = rp->res; | |
2255 | file_data->respairs.release (); | |
2256 | ||
2257 | file_data->renaming_hash_table = lto_create_renaming_table (); | |
2258 | file_data->file_name = file->filename; | |
ebad2eee | 2259 | file_data->order = order; |
88614dfa ML |
2260 | |
2261 | /* Read and verify LTO section. */ | |
3c56d8d8 | 2262 | data = lto_get_summary_section_data (file_data, LTO_section_lto, &len); |
88614dfa ML |
2263 | if (data == NULL) |
2264 | { | |
2265 | fatal_error (input_location, "bytecode stream in file %qs generated " | |
2266 | "with GCC compiler older than 10.0", file_data->file_name); | |
2267 | return; | |
2268 | } | |
2269 | ||
70980ea2 | 2270 | memcpy (&file_data->lto_section_header, data, sizeof (lto_section)); |
88614dfa ML |
2271 | lto_check_version (file_data->lto_section_header.major_version, |
2272 | file_data->lto_section_header.minor_version, | |
2273 | file_data->file_name); | |
2274 | ||
b835645c ML |
2275 | #ifdef ACCEL_COMPILER |
2276 | lto_input_mode_table (file_data); | |
2277 | #else | |
c81d9b9f | 2278 | file_data->mode_table = NULL; |
86ff0533 | 2279 | file_data->mode_bits = ceil_log2 (MAX_MACHINE_MODE); |
b835645c ML |
2280 | #endif |
2281 | ||
3c56d8d8 | 2282 | data = lto_get_summary_section_data (file_data, LTO_section_decls, &len); |
a79420f9 ML |
2283 | if (data == NULL) |
2284 | { | |
0ecf545c MS |
2285 | internal_error ("cannot read %<LTO_section_decls%> from %s", |
2286 | file_data->file_name); | |
a79420f9 ML |
2287 | return; |
2288 | } | |
ee7a003f | 2289 | /* Frees resolutions. */ |
a79420f9 ML |
2290 | lto_read_decls (file_data, data, resolutions); |
2291 | lto_free_section_data (file_data, LTO_section_decls, NULL, data, len); | |
2292 | } | |
2293 | ||
ee7a003f | 2294 | /* Finalize FILE_DATA in FILE and increase COUNT. */ |
a79420f9 | 2295 | |
ee7a003f | 2296 | static int |
a79420f9 | 2297 | lto_create_files_from_ids (lto_file *file, struct lto_file_decl_data *file_data, |
ebad2eee | 2298 | int *count, int order) |
a79420f9 | 2299 | { |
ebad2eee | 2300 | lto_file_finalize (file_data, file, order); |
a79420f9 ML |
2301 | if (symtab->dump_file) |
2302 | fprintf (symtab->dump_file, | |
2303 | "Creating file %s with sub id " HOST_WIDE_INT_PRINT_HEX "\n", | |
2304 | file_data->file_name, file_data->id); | |
2305 | (*count)++; | |
2306 | return 0; | |
2307 | } | |
2308 | ||
2309 | /* Generate a TREE representation for all types and external decls | |
ee7a003f | 2310 | entities in FILE. |
a79420f9 ML |
2311 | |
2312 | Read all of the globals out of the file. Then read the cgraph | |
2313 | and process the .o index into the cgraph nodes so that it can open | |
ee7a003f | 2314 | the .o file to load the functions and ipa information. */ |
a79420f9 ML |
2315 | |
2316 | static struct lto_file_decl_data * | |
2317 | lto_file_read (lto_file *file, FILE *resolution_file, int *count) | |
2318 | { | |
2319 | struct lto_file_decl_data *file_data = NULL; | |
2320 | splay_tree file_ids; | |
2321 | htab_t section_hash_table; | |
2322 | struct lto_section_slot *section; | |
2323 | struct file_data_list file_list; | |
2324 | struct lto_section_list section_list; | |
ee7a003f ML |
2325 | |
2326 | memset (§ion_list, 0, sizeof (struct lto_section_list)); | |
a79420f9 ML |
2327 | section_hash_table = lto_obj_build_section_table (file, §ion_list); |
2328 | ||
66d62d9f HK |
2329 | /* Dump the details of LTO objects. */ |
2330 | if (flag_lto_dump_objects) | |
2331 | { | |
2332 | int i=0; | |
2333 | fprintf (stdout, "\n LTO Object Name: %s\n", file->filename); | |
2334 | fprintf (stdout, "\nNo. Offset Size Section Name\n\n"); | |
2335 | for (section = section_list.first; section != NULL; section = section->next) | |
03de2955 RO |
2336 | fprintf (stdout, "%2d %8" PRId64 " %8" PRIu64 " %s\n", |
2337 | ++i, (int64_t) section->start, (uint64_t) section->len, | |
2338 | section->name); | |
66d62d9f HK |
2339 | } |
2340 | ||
a79420f9 | 2341 | /* Find all sub modules in the object and put their sections into new hash |
ee7a003f | 2342 | tables in a splay tree. */ |
a79420f9 ML |
2343 | file_ids = lto_splay_tree_new (); |
2344 | memset (&file_list, 0, sizeof (struct file_data_list)); | |
2345 | for (section = section_list.first; section != NULL; section = section->next) | |
2346 | create_subid_section_table (section, file_ids, &file_list); | |
2347 | ||
ee7a003f | 2348 | /* Add resolutions to file ids. */ |
a79420f9 ML |
2349 | lto_resolution_read (file_ids, resolution_file, file); |
2350 | ||
ee7a003f | 2351 | /* Finalize each lto file for each submodule in the merged object. */ |
ebad2eee | 2352 | int order = 0; |
ee7a003f ML |
2353 | for (file_data = file_list.first; file_data != NULL; |
2354 | file_data = file_data->next) | |
ebad2eee | 2355 | lto_create_files_from_ids (file, file_data, count, order++); |
ee7a003f | 2356 | |
a79420f9 ML |
2357 | splay_tree_delete (file_ids); |
2358 | htab_delete (section_hash_table); | |
2359 | ||
2360 | return file_list.first; | |
2361 | } | |
2362 | ||
2363 | #if HAVE_MMAP_FILE && HAVE_SYSCONF && defined _SC_PAGE_SIZE | |
2364 | #define LTO_MMAP_IO 1 | |
2365 | #endif | |
2366 | ||
2367 | #if LTO_MMAP_IO | |
2368 | /* Page size of machine is used for mmap and munmap calls. */ | |
2369 | static size_t page_mask; | |
2370 | #endif | |
2371 | ||
2372 | /* Get the section data of length LEN from FILENAME starting at | |
2373 | OFFSET. The data segment must be freed by the caller when the | |
2374 | caller is finished. Returns NULL if all was not well. */ | |
2375 | ||
2376 | static char * | |
2377 | lto_read_section_data (struct lto_file_decl_data *file_data, | |
2378 | intptr_t offset, size_t len) | |
2379 | { | |
2380 | char *result; | |
2381 | static int fd = -1; | |
2382 | static char *fd_name; | |
2383 | #if LTO_MMAP_IO | |
2384 | intptr_t computed_len; | |
2385 | intptr_t computed_offset; | |
2386 | intptr_t diff; | |
2387 | #endif | |
2388 | ||
2389 | /* Keep a single-entry file-descriptor cache. The last file we | |
2390 | touched will get closed at exit. | |
2391 | ??? Eventually we want to add a more sophisticated larger cache | |
2392 | or rather fix function body streaming to not stream them in | |
2393 | practically random order. */ | |
2394 | if (fd != -1 | |
2395 | && filename_cmp (fd_name, file_data->file_name) != 0) | |
2396 | { | |
2397 | free (fd_name); | |
2398 | close (fd); | |
2399 | fd = -1; | |
2400 | } | |
2401 | if (fd == -1) | |
2402 | { | |
2403 | fd = open (file_data->file_name, O_RDONLY|O_BINARY); | |
2404 | if (fd == -1) | |
ee7a003f | 2405 | { |
a79420f9 ML |
2406 | fatal_error (input_location, "Cannot open %s", file_data->file_name); |
2407 | return NULL; | |
ee7a003f | 2408 | } |
a79420f9 ML |
2409 | fd_name = xstrdup (file_data->file_name); |
2410 | } | |
2411 | ||
2412 | #if LTO_MMAP_IO | |
2413 | if (!page_mask) | |
2414 | { | |
2415 | size_t page_size = sysconf (_SC_PAGE_SIZE); | |
2416 | page_mask = ~(page_size - 1); | |
2417 | } | |
2418 | ||
2419 | computed_offset = offset & page_mask; | |
2420 | diff = offset - computed_offset; | |
2421 | computed_len = len + diff; | |
2422 | ||
2423 | result = (char *) mmap (NULL, computed_len, PROT_READ, MAP_PRIVATE, | |
2424 | fd, computed_offset); | |
2425 | if (result == MAP_FAILED) | |
2426 | { | |
2427 | fatal_error (input_location, "Cannot map %s", file_data->file_name); | |
2428 | return NULL; | |
2429 | } | |
2430 | ||
2431 | return result + diff; | |
2432 | #else | |
2433 | result = (char *) xmalloc (len); | |
2434 | if (lseek (fd, offset, SEEK_SET) != offset | |
2435 | || read (fd, result, len) != (ssize_t) len) | |
2436 | { | |
2437 | free (result); | |
2438 | fatal_error (input_location, "Cannot read %s", file_data->file_name); | |
2439 | result = NULL; | |
2440 | } | |
2441 | #ifdef __MINGW32__ | |
ee7a003f ML |
2442 | /* Native windows doesn't supports delayed unlink on opened file. So |
2443 | we close file here again. This produces higher I/O load, but at least | |
a79420f9 ML |
2444 | it prevents to have dangling file handles preventing unlink. */ |
2445 | free (fd_name); | |
2446 | fd_name = NULL; | |
2447 | close (fd); | |
2448 | fd = -1; | |
2449 | #endif | |
2450 | return result; | |
2451 | #endif | |
ee7a003f | 2452 | } |
a79420f9 ML |
2453 | |
2454 | ||
2455 | /* Get the section data from FILE_DATA of SECTION_TYPE with NAME. | |
2456 | NAME will be NULL unless the section type is for a function | |
2457 | body. */ | |
2458 | ||
2459 | static const char * | |
2460 | get_section_data (struct lto_file_decl_data *file_data, | |
3c56d8d8 ML |
2461 | enum lto_section_type section_type, |
2462 | const char *name, int order, | |
2463 | size_t *len) | |
a79420f9 ML |
2464 | { |
2465 | htab_t section_hash_table = file_data->section_hash_table; | |
2466 | struct lto_section_slot *f_slot; | |
2467 | struct lto_section_slot s_slot; | |
ee7a003f | 2468 | const char *section_name = lto_get_section_name (section_type, name, |
3c56d8d8 | 2469 | order, file_data); |
a79420f9 ML |
2470 | char *data = NULL; |
2471 | ||
2472 | *len = 0; | |
2473 | s_slot.name = section_name; | |
2474 | f_slot = (struct lto_section_slot *) htab_find (section_hash_table, &s_slot); | |
2475 | if (f_slot) | |
2476 | { | |
2477 | data = lto_read_section_data (file_data, f_slot->start, f_slot->len); | |
2478 | *len = f_slot->len; | |
2479 | } | |
2480 | ||
2481 | free (CONST_CAST (char *, section_name)); | |
2482 | return data; | |
2483 | } | |
2484 | ||
2485 | ||
2486 | /* Free the section data from FILE_DATA of SECTION_TYPE with NAME that | |
2487 | starts at OFFSET and has LEN bytes. */ | |
2488 | ||
2489 | static void | |
2490 | free_section_data (struct lto_file_decl_data *file_data ATTRIBUTE_UNUSED, | |
2491 | enum lto_section_type section_type ATTRIBUTE_UNUSED, | |
2492 | const char *name ATTRIBUTE_UNUSED, | |
2493 | const char *offset, size_t len ATTRIBUTE_UNUSED) | |
2494 | { | |
2495 | #if LTO_MMAP_IO | |
2496 | intptr_t computed_len; | |
2497 | intptr_t computed_offset; | |
2498 | intptr_t diff; | |
2499 | #endif | |
2500 | ||
2501 | #if LTO_MMAP_IO | |
2502 | computed_offset = ((intptr_t) offset) & page_mask; | |
2503 | diff = (intptr_t) offset - computed_offset; | |
2504 | computed_len = len + diff; | |
2505 | ||
2506 | munmap ((caddr_t) computed_offset, computed_len); | |
2507 | #else | |
2508 | free (CONST_CAST(char *, offset)); | |
2509 | #endif | |
2510 | } | |
2511 | ||
2512 | static lto_file *current_lto_file; | |
2513 | ||
2514 | /* If TT is a variable or function decl replace it with its | |
2515 | prevailing variant. */ | |
2516 | #define LTO_SET_PREVAIL(tt) \ | |
2517 | do {\ | |
2518 | if ((tt) && VAR_OR_FUNCTION_DECL_P (tt) \ | |
2519 | && (TREE_PUBLIC (tt) || DECL_EXTERNAL (tt))) \ | |
2520 | { \ | |
ee7a003f | 2521 | tt = lto_symtab_prevailing_decl (tt); \ |
a79420f9 ML |
2522 | fixed = true; \ |
2523 | } \ | |
2524 | } while (0) | |
2525 | ||
2526 | /* Ensure that TT isn't a replacable var of function decl. */ | |
2527 | #define LTO_NO_PREVAIL(tt) \ | |
2528 | gcc_checking_assert (!(tt) || !VAR_OR_FUNCTION_DECL_P (tt)) | |
2529 | ||
2530 | /* Given a tree T replace all fields referring to variables or functions | |
2531 | with their prevailing variant. */ | |
2532 | static void | |
2533 | lto_fixup_prevailing_decls (tree t) | |
2534 | { | |
2535 | enum tree_code code = TREE_CODE (t); | |
2536 | bool fixed = false; | |
2537 | ||
2538 | gcc_checking_assert (code != TREE_BINFO); | |
2539 | LTO_NO_PREVAIL (TREE_TYPE (t)); | |
2540 | if (CODE_CONTAINS_STRUCT (code, TS_COMMON) | |
2541 | /* lto_symtab_prevail_decl use TREE_CHAIN to link to the prevailing decl. | |
ee7a003f | 2542 | in the case T is a prevailed declaration we would ICE here. */ |
a79420f9 ML |
2543 | && !VAR_OR_FUNCTION_DECL_P (t)) |
2544 | LTO_NO_PREVAIL (TREE_CHAIN (t)); | |
2545 | if (DECL_P (t)) | |
2546 | { | |
2547 | LTO_NO_PREVAIL (DECL_NAME (t)); | |
2548 | LTO_SET_PREVAIL (DECL_CONTEXT (t)); | |
2549 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON)) | |
2550 | { | |
2551 | LTO_SET_PREVAIL (DECL_SIZE (t)); | |
2552 | LTO_SET_PREVAIL (DECL_SIZE_UNIT (t)); | |
2553 | LTO_SET_PREVAIL (DECL_INITIAL (t)); | |
2554 | LTO_NO_PREVAIL (DECL_ATTRIBUTES (t)); | |
2555 | LTO_SET_PREVAIL (DECL_ABSTRACT_ORIGIN (t)); | |
2556 | } | |
2557 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS)) | |
2558 | { | |
2559 | LTO_NO_PREVAIL (DECL_ASSEMBLER_NAME_RAW (t)); | |
2560 | } | |
2561 | if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON)) | |
2562 | { | |
2563 | LTO_NO_PREVAIL (DECL_RESULT_FLD (t)); | |
2564 | } | |
2565 | if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL)) | |
2566 | { | |
2567 | LTO_NO_PREVAIL (DECL_ARGUMENTS (t)); | |
2568 | LTO_SET_PREVAIL (DECL_FUNCTION_PERSONALITY (t)); | |
2569 | LTO_NO_PREVAIL (DECL_VINDEX (t)); | |
2570 | } | |
2571 | if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL)) | |
2572 | { | |
2573 | LTO_SET_PREVAIL (DECL_FIELD_OFFSET (t)); | |
2574 | LTO_NO_PREVAIL (DECL_BIT_FIELD_TYPE (t)); | |
2575 | LTO_NO_PREVAIL (DECL_QUALIFIER (t)); | |
2576 | LTO_NO_PREVAIL (DECL_FIELD_BIT_OFFSET (t)); | |
2577 | LTO_NO_PREVAIL (DECL_FCONTEXT (t)); | |
2578 | } | |
2579 | } | |
2580 | else if (TYPE_P (t)) | |
2581 | { | |
2582 | LTO_NO_PREVAIL (TYPE_CACHED_VALUES (t)); | |
2583 | LTO_SET_PREVAIL (TYPE_SIZE (t)); | |
2584 | LTO_SET_PREVAIL (TYPE_SIZE_UNIT (t)); | |
2585 | LTO_NO_PREVAIL (TYPE_ATTRIBUTES (t)); | |
2586 | LTO_NO_PREVAIL (TYPE_NAME (t)); | |
2587 | ||
2588 | LTO_SET_PREVAIL (TYPE_MIN_VALUE_RAW (t)); | |
2589 | LTO_SET_PREVAIL (TYPE_MAX_VALUE_RAW (t)); | |
2590 | LTO_NO_PREVAIL (TYPE_LANG_SLOT_1 (t)); | |
2591 | ||
2592 | LTO_SET_PREVAIL (TYPE_CONTEXT (t)); | |
2593 | ||
2594 | LTO_NO_PREVAIL (TYPE_CANONICAL (t)); | |
2595 | LTO_NO_PREVAIL (TYPE_MAIN_VARIANT (t)); | |
2596 | LTO_NO_PREVAIL (TYPE_NEXT_VARIANT (t)); | |
2597 | } | |
2598 | else if (EXPR_P (t)) | |
2599 | { | |
2600 | int i; | |
2601 | for (i = TREE_OPERAND_LENGTH (t) - 1; i >= 0; --i) | |
2602 | LTO_SET_PREVAIL (TREE_OPERAND (t, i)); | |
2603 | } | |
2604 | else if (TREE_CODE (t) == CONSTRUCTOR) | |
2605 | { | |
2606 | unsigned i; | |
2607 | tree val; | |
2608 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (t), i, val) | |
2609 | LTO_SET_PREVAIL (val); | |
2610 | } | |
2611 | else | |
2612 | { | |
2613 | switch (code) | |
2614 | { | |
2615 | case TREE_LIST: | |
2616 | LTO_SET_PREVAIL (TREE_VALUE (t)); | |
2617 | LTO_SET_PREVAIL (TREE_PURPOSE (t)); | |
a79420f9 ML |
2618 | break; |
2619 | default: | |
2620 | gcc_unreachable (); | |
2621 | } | |
2622 | } | |
2623 | /* If we fixed nothing, then we missed something seen by | |
2624 | mentions_vars_p. */ | |
2625 | gcc_checking_assert (fixed); | |
2626 | } | |
2627 | #undef LTO_SET_PREVAIL | |
2628 | #undef LTO_NO_PREVAIL | |
2629 | ||
ee7a003f | 2630 | /* Helper function of lto_fixup_decls. Walks the var and fn streams in STATE, |
a79420f9 ML |
2631 | replaces var and function decls with the corresponding prevailing def. */ |
2632 | ||
2633 | static void | |
2634 | lto_fixup_state (struct lto_in_decl_state *state) | |
2635 | { | |
2636 | unsigned i, si; | |
2637 | ||
2638 | /* Although we only want to replace FUNCTION_DECLs and VAR_DECLs, | |
2639 | we still need to walk from all DECLs to find the reachable | |
2640 | FUNCTION_DECLs and VAR_DECLs. */ | |
2641 | for (si = 0; si < LTO_N_DECL_STREAMS; si++) | |
2642 | { | |
2643 | vec<tree, va_gc> *trees = state->streams[si]; | |
2644 | for (i = 0; i < vec_safe_length (trees); i++) | |
2645 | { | |
2646 | tree t = (*trees)[i]; | |
2647 | if (flag_checking && TYPE_P (t)) | |
2648 | verify_type (t); | |
2649 | if (VAR_OR_FUNCTION_DECL_P (t) | |
2650 | && (TREE_PUBLIC (t) || DECL_EXTERNAL (t))) | |
2651 | (*trees)[i] = lto_symtab_prevailing_decl (t); | |
2652 | } | |
2653 | } | |
2654 | } | |
2655 | ||
ee7a003f | 2656 | /* Fix the decls from all FILES. Replaces each decl with the corresponding |
a79420f9 ML |
2657 | prevailing one. */ |
2658 | ||
2659 | static void | |
2660 | lto_fixup_decls (struct lto_file_decl_data **files) | |
2661 | { | |
2662 | unsigned int i; | |
2663 | tree t; | |
2664 | ||
2665 | if (tree_with_vars) | |
2666 | FOR_EACH_VEC_ELT ((*tree_with_vars), i, t) | |
2667 | lto_fixup_prevailing_decls (t); | |
2668 | ||
2669 | for (i = 0; files[i]; i++) | |
2670 | { | |
2671 | struct lto_file_decl_data *file = files[i]; | |
2672 | struct lto_in_decl_state *state = file->global_decl_state; | |
2673 | lto_fixup_state (state); | |
2674 | ||
2675 | hash_table<decl_state_hasher>::iterator iter; | |
2676 | lto_in_decl_state *elt; | |
2677 | FOR_EACH_HASH_TABLE_ELEMENT (*file->function_decl_states, elt, | |
2678 | lto_in_decl_state *, iter) | |
2679 | lto_fixup_state (elt); | |
2680 | } | |
2681 | } | |
2682 | ||
2683 | static GTY((length ("lto_stats.num_input_files + 1"))) struct lto_file_decl_data **all_file_decl_data; | |
2684 | ||
2685 | /* Turn file datas for sub files into a single array, so that they look | |
ee7a003f | 2686 | like separate files for further passes. */ |
a79420f9 ML |
2687 | |
2688 | static void | |
ee7a003f ML |
2689 | lto_flatten_files (struct lto_file_decl_data **orig, int count, |
2690 | int last_file_ix) | |
a79420f9 ML |
2691 | { |
2692 | struct lto_file_decl_data *n, *next; | |
2693 | int i, k; | |
2694 | ||
2695 | lto_stats.num_input_files = count; | |
2696 | all_file_decl_data | |
2697 | = ggc_cleared_vec_alloc<lto_file_decl_data_ptr> (count + 1); | |
2698 | /* Set the hooks so that all of the ipa passes can read in their data. */ | |
2699 | lto_set_in_hooks (all_file_decl_data, get_section_data, free_section_data); | |
ee7a003f | 2700 | for (i = 0, k = 0; i < last_file_ix; i++) |
a79420f9 ML |
2701 | { |
2702 | for (n = orig[i]; n != NULL; n = next) | |
2703 | { | |
2704 | all_file_decl_data[k++] = n; | |
2705 | next = n->next; | |
2706 | n->next = NULL; | |
2707 | } | |
2708 | } | |
2709 | all_file_decl_data[k] = NULL; | |
2710 | gcc_assert (k == count); | |
2711 | } | |
2712 | ||
2713 | /* Input file data before flattening (i.e. splitting them to subfiles to support | |
2714 | incremental linking. */ | |
2715 | static int real_file_count; | |
2716 | static GTY((length ("real_file_count + 1"))) struct lto_file_decl_data **real_file_decl_data; | |
2717 | ||
2718 | /* Read all the symbols from the input files FNAMES. NFILES is the | |
2719 | number of files requested in the command line. Instantiate a | |
2720 | global call graph by aggregating all the sub-graphs found in each | |
2721 | file. */ | |
2722 | ||
2723 | void | |
2724 | read_cgraph_and_symbols (unsigned nfiles, const char **fnames) | |
2725 | { | |
2726 | unsigned int i, last_file_ix; | |
2727 | FILE *resolution; | |
9a92e46c | 2728 | unsigned resolution_objects = 0; |
a79420f9 ML |
2729 | int count = 0; |
2730 | struct lto_file_decl_data **decl_data; | |
2731 | symtab_node *snode; | |
2732 | ||
2733 | symtab->initialize (); | |
2734 | ||
2735 | timevar_push (TV_IPA_LTO_DECL_IN); | |
2736 | ||
2737 | #ifdef ACCEL_COMPILER | |
2738 | section_name_prefix = OFFLOAD_SECTION_NAME_PREFIX; | |
2739 | lto_stream_offload_p = true; | |
2740 | #endif | |
2741 | ||
2742 | real_file_decl_data | |
2743 | = decl_data = ggc_cleared_vec_alloc<lto_file_decl_data_ptr> (nfiles + 1); | |
2744 | real_file_count = nfiles; | |
2745 | ||
2746 | /* Read the resolution file. */ | |
2747 | resolution = NULL; | |
2748 | if (resolution_file_name) | |
2749 | { | |
2750 | int t; | |
a79420f9 ML |
2751 | |
2752 | resolution = fopen (resolution_file_name, "r"); | |
2753 | if (resolution == NULL) | |
2754 | fatal_error (input_location, | |
2755 | "could not open symbol resolution file: %m"); | |
2756 | ||
9a92e46c | 2757 | t = fscanf (resolution, "%u", &resolution_objects); |
a79420f9 | 2758 | gcc_assert (t == 1); |
a79420f9 ML |
2759 | } |
2760 | symtab->state = LTO_STREAMING; | |
2761 | ||
2762 | canonical_type_hash_cache = new hash_map<const_tree, hashval_t> (251); | |
2763 | gimple_canonical_types = htab_create (16381, gimple_canonical_type_hash, | |
2764 | gimple_canonical_type_eq, NULL); | |
2765 | gcc_obstack_init (&tree_scc_hash_obstack); | |
2766 | tree_scc_hash = new hash_table<tree_scc_hasher> (4096); | |
2767 | ||
2768 | /* Register the common node types with the canonical type machinery so | |
2769 | we properly share alias-sets across languages and TUs. Do not | |
2770 | expose the common nodes as type merge target - those that should be | |
2771 | are already exposed so by pre-loading the LTO streamer caches. | |
2772 | Do two passes - first clear TYPE_CANONICAL and then re-compute it. */ | |
2773 | for (i = 0; i < itk_none; ++i) | |
2774 | lto_register_canonical_types (integer_types[i], true); | |
2775 | for (i = 0; i < stk_type_kind_last; ++i) | |
2776 | lto_register_canonical_types (sizetype_tab[i], true); | |
2777 | for (i = 0; i < TI_MAX; ++i) | |
2778 | lto_register_canonical_types (global_trees[i], true); | |
2779 | for (i = 0; i < itk_none; ++i) | |
2780 | lto_register_canonical_types (integer_types[i], false); | |
2781 | for (i = 0; i < stk_type_kind_last; ++i) | |
2782 | lto_register_canonical_types (sizetype_tab[i], false); | |
2783 | for (i = 0; i < TI_MAX; ++i) | |
2784 | lto_register_canonical_types (global_trees[i], false); | |
2785 | ||
2786 | if (!quiet_flag) | |
2787 | fprintf (stderr, "Reading object files:"); | |
2788 | ||
2789 | /* Read all of the object files specified on the command line. */ | |
2790 | for (i = 0, last_file_ix = 0; i < nfiles; ++i) | |
2791 | { | |
2792 | struct lto_file_decl_data *file_data = NULL; | |
2793 | if (!quiet_flag) | |
2794 | { | |
2795 | fprintf (stderr, " %s", fnames[i]); | |
2796 | fflush (stderr); | |
2797 | } | |
2798 | ||
2799 | current_lto_file = lto_obj_file_open (fnames[i], false); | |
2800 | if (!current_lto_file) | |
2801 | break; | |
2802 | ||
2803 | file_data = lto_file_read (current_lto_file, resolution, &count); | |
2804 | if (!file_data) | |
2805 | { | |
2806 | lto_obj_file_close (current_lto_file); | |
2807 | free (current_lto_file); | |
2808 | current_lto_file = NULL; | |
2809 | break; | |
2810 | } | |
2811 | ||
2812 | decl_data[last_file_ix++] = file_data; | |
2813 | ||
2814 | lto_obj_file_close (current_lto_file); | |
2815 | free (current_lto_file); | |
2816 | current_lto_file = NULL; | |
2817 | } | |
2818 | ||
2819 | lto_flatten_files (decl_data, count, last_file_ix); | |
2820 | lto_stats.num_input_files = count; | |
2821 | ggc_free(decl_data); | |
2822 | real_file_decl_data = NULL; | |
2823 | ||
a0276c00 JH |
2824 | lto_register_canonical_types_for_odr_types (); |
2825 | ||
a79420f9 | 2826 | if (resolution_file_name) |
9a92e46c ML |
2827 | { |
2828 | /* True, since the plugin splits the archives. */ | |
2829 | gcc_assert (resolution_objects == nfiles); | |
2830 | fclose (resolution); | |
2831 | } | |
a79420f9 ML |
2832 | |
2833 | /* Show the LTO report before launching LTRANS. */ | |
2834 | if (flag_lto_report || (flag_wpa && flag_lto_report_wpa)) | |
2835 | print_lto_report_1 (); | |
2836 | ||
2837 | /* Free gimple type merging datastructures. */ | |
2838 | delete tree_scc_hash; | |
2839 | tree_scc_hash = NULL; | |
2840 | obstack_free (&tree_scc_hash_obstack, NULL); | |
2841 | htab_delete (gimple_canonical_types); | |
2842 | gimple_canonical_types = NULL; | |
2843 | delete canonical_type_hash_cache; | |
2844 | canonical_type_hash_cache = NULL; | |
2845 | ||
ee7a003f | 2846 | /* At this stage we know that majority of GGC memory is reachable. |
a79420f9 ML |
2847 | Growing the limits prevents unnecesary invocation of GGC. */ |
2848 | ggc_grow (); | |
c9ef0409 | 2849 | report_heap_memory_use (); |
a79420f9 ML |
2850 | |
2851 | /* Set the hooks so that all of the ipa passes can read in their data. */ | |
2852 | lto_set_in_hooks (all_file_decl_data, get_section_data, free_section_data); | |
2853 | ||
2854 | timevar_pop (TV_IPA_LTO_DECL_IN); | |
2855 | ||
2856 | if (!quiet_flag) | |
c9ef0409 | 2857 | fprintf (stderr, "\nReading the symbol table:"); |
a79420f9 ML |
2858 | |
2859 | timevar_push (TV_IPA_LTO_CGRAPH_IO); | |
2860 | /* Read the symtab. */ | |
2861 | input_symtab (); | |
2862 | ||
2863 | input_offload_tables (!flag_ltrans); | |
2864 | ||
2865 | /* Store resolutions into the symbol table. */ | |
2866 | ||
2867 | FOR_EACH_SYMBOL (snode) | |
2868 | if (snode->externally_visible && snode->real_symbol_p () | |
2869 | && snode->lto_file_data && snode->lto_file_data->resolution_map | |
2870 | && !(TREE_CODE (snode->decl) == FUNCTION_DECL | |
2871 | && fndecl_built_in_p (snode->decl)) | |
2872 | && !(VAR_P (snode->decl) && DECL_HARD_REGISTER (snode->decl))) | |
2873 | { | |
2874 | ld_plugin_symbol_resolution_t *res; | |
2875 | ||
2876 | res = snode->lto_file_data->resolution_map->get (snode->decl); | |
2877 | if (!res || *res == LDPR_UNKNOWN) | |
2878 | { | |
2879 | if (snode->output_to_lto_symbol_table_p ()) | |
2880 | fatal_error (input_location, "missing resolution data for %s", | |
ee7a003f | 2881 | IDENTIFIER_POINTER |
a79420f9 ML |
2882 | (DECL_ASSEMBLER_NAME (snode->decl))); |
2883 | } | |
40ebe1fc JH |
2884 | /* Symbol versions are always used externally, but linker does not |
2885 | report that correctly. | |
2886 | This is binutils PR25924. */ | |
2887 | else if (snode->symver && *res == LDPR_PREVAILING_DEF_IRONLY) | |
2888 | snode->resolution = LDPR_PREVAILING_DEF_IRONLY_EXP; | |
a79420f9 | 2889 | else |
ee7a003f | 2890 | snode->resolution = *res; |
a79420f9 ML |
2891 | } |
2892 | for (i = 0; all_file_decl_data[i]; i++) | |
2893 | if (all_file_decl_data[i]->resolution_map) | |
2894 | { | |
ee7a003f ML |
2895 | delete all_file_decl_data[i]->resolution_map; |
2896 | all_file_decl_data[i]->resolution_map = NULL; | |
a79420f9 | 2897 | } |
ee7a003f | 2898 | |
a79420f9 ML |
2899 | timevar_pop (TV_IPA_LTO_CGRAPH_IO); |
2900 | ||
2901 | if (!quiet_flag) | |
c9ef0409 | 2902 | fprintf (stderr, "\nMerging declarations:"); |
a79420f9 ML |
2903 | |
2904 | timevar_push (TV_IPA_LTO_DECL_MERGE); | |
2905 | /* Merge global decls. In ltrans mode we read merged cgraph, we do not | |
2906 | need to care about resolving symbols again, we only need to replace | |
2907 | duplicated declarations read from the callgraph and from function | |
2908 | sections. */ | |
2909 | if (!flag_ltrans) | |
2910 | { | |
2911 | lto_symtab_merge_decls (); | |
2912 | ||
2913 | /* If there were errors during symbol merging bail out, we have no | |
2914 | good way to recover here. */ | |
2915 | if (seen_error ()) | |
2916 | fatal_error (input_location, | |
2917 | "errors during merging of translation units"); | |
2918 | ||
2919 | /* Fixup all decls. */ | |
2920 | lto_fixup_decls (all_file_decl_data); | |
2921 | } | |
2922 | if (tree_with_vars) | |
2923 | ggc_free (tree_with_vars); | |
2924 | tree_with_vars = NULL; | |
7cc47709 JH |
2925 | /* During WPA we want to prevent ggc collecting by default. Grow limits |
2926 | until after the IPA summaries are streamed in. Basically all IPA memory | |
2927 | is explcitly managed by ggc_free and ggc collect is not useful. | |
2928 | Exception are the merged declarations. */ | |
2929 | ggc_grow (); | |
c9ef0409 | 2930 | report_heap_memory_use (); |
a79420f9 ML |
2931 | |
2932 | timevar_pop (TV_IPA_LTO_DECL_MERGE); | |
2933 | /* Each pass will set the appropriate timer. */ | |
2934 | ||
2935 | if (!quiet_flag) | |
c9ef0409 | 2936 | fprintf (stderr, "\nReading summaries:"); |
a79420f9 ML |
2937 | |
2938 | /* Read the IPA summary data. */ | |
2939 | if (flag_ltrans) | |
2940 | ipa_read_optimization_summaries (); | |
2941 | else | |
2942 | ipa_read_summaries (); | |
2943 | ||
7cc47709 JH |
2944 | ggc_grow (); |
2945 | ||
a79420f9 ML |
2946 | for (i = 0; all_file_decl_data[i]; i++) |
2947 | { | |
2948 | gcc_assert (all_file_decl_data[i]->symtab_node_encoder); | |
2949 | lto_symtab_encoder_delete (all_file_decl_data[i]->symtab_node_encoder); | |
2950 | all_file_decl_data[i]->symtab_node_encoder = NULL; | |
ee7a003f ML |
2951 | lto_in_decl_state *global_decl_state |
2952 | = all_file_decl_data[i]->global_decl_state; | |
2953 | lto_free_function_in_decl_state (global_decl_state); | |
a79420f9 | 2954 | all_file_decl_data[i]->global_decl_state = NULL; |
ee7a003f | 2955 | all_file_decl_data[i]->current_decl_state = NULL; |
a79420f9 ML |
2956 | } |
2957 | ||
2958 | if (!flag_ltrans) | |
2959 | { | |
2960 | /* Finally merge the cgraph according to the decl merging decisions. */ | |
2961 | timevar_push (TV_IPA_LTO_CGRAPH_MERGE); | |
2962 | ||
c9ef0409 JH |
2963 | if (!quiet_flag) |
2964 | fprintf (stderr, "\nMerging symbols:"); | |
2965 | ||
a79420f9 ML |
2966 | gcc_assert (!dump_file); |
2967 | dump_file = dump_begin (lto_link_dump_id, NULL); | |
2968 | ||
2969 | if (dump_file) | |
2970 | { | |
2971 | fprintf (dump_file, "Before merging:\n"); | |
2972 | symtab->dump (dump_file); | |
2973 | } | |
2974 | lto_symtab_merge_symbols (); | |
2975 | /* Removal of unreachable symbols is needed to make verify_symtab to pass; | |
2976 | we are still having duplicated comdat groups containing local statics. | |
2977 | We could also just remove them while merging. */ | |
2978 | symtab->remove_unreachable_nodes (dump_file); | |
2979 | ggc_collect (); | |
c9ef0409 | 2980 | report_heap_memory_use (); |
a79420f9 ML |
2981 | |
2982 | if (dump_file) | |
ee7a003f | 2983 | dump_end (lto_link_dump_id, dump_file); |
a79420f9 ML |
2984 | dump_file = NULL; |
2985 | timevar_pop (TV_IPA_LTO_CGRAPH_MERGE); | |
2986 | } | |
2987 | symtab->state = IPA_SSA; | |
2988 | /* All node removals happening here are useless, because | |
2989 | WPA should not stream them. Still always perform remove_unreachable_nodes | |
2990 | because we may reshape clone tree, get rid of dead masters of inline | |
2991 | clones and remove symbol entries for read-only variables we keep around | |
2992 | only to be able to constant fold them. */ | |
2993 | if (flag_ltrans) | |
2994 | { | |
2995 | if (symtab->dump_file) | |
2996 | symtab->dump (symtab->dump_file); | |
2997 | symtab->remove_unreachable_nodes (symtab->dump_file); | |
2998 | } | |
2999 | ||
3000 | /* Indicate that the cgraph is built and ready. */ | |
3001 | symtab->function_flags_ready = true; | |
3002 | ||
3003 | ggc_free (all_file_decl_data); | |
3004 | all_file_decl_data = NULL; | |
3005 | } | |
3006 | ||
3007 | ||
3008 | ||
3009 | /* Show various memory usage statistics related to LTO. */ | |
3010 | void | |
3011 | print_lto_report_1 (void) | |
3012 | { | |
3013 | const char *pfx = (flag_lto) ? "LTO" : (flag_wpa) ? "WPA" : "LTRANS"; | |
3014 | fprintf (stderr, "%s statistics\n", pfx); | |
3015 | ||
03d90a20 JH |
3016 | fprintf (stderr, "[%s] read %lu unshared trees\n", |
3017 | pfx, num_unshared_trees_read); | |
3018 | fprintf (stderr, "[%s] read %lu mergeable SCCs of average size %f\n", | |
a79420f9 | 3019 | pfx, num_sccs_read, total_scc_size / (double)num_sccs_read); |
03d90a20 JH |
3020 | fprintf (stderr, "[%s] %lu tree bodies read in total\n", pfx, |
3021 | total_scc_size + num_unshared_trees_read); | |
3022 | if (flag_wpa && tree_scc_hash && num_sccs_read) | |
a79420f9 ML |
3023 | { |
3024 | fprintf (stderr, "[%s] tree SCC table: size %ld, %ld elements, " | |
3025 | "collision ratio: %f\n", pfx, | |
3026 | (long) tree_scc_hash->size (), | |
3027 | (long) tree_scc_hash->elements (), | |
3028 | tree_scc_hash->collisions ()); | |
3029 | hash_table<tree_scc_hasher>::iterator hiter; | |
3030 | tree_scc *scc, *max_scc = NULL; | |
3031 | unsigned max_length = 0; | |
3032 | FOR_EACH_HASH_TABLE_ELEMENT (*tree_scc_hash, scc, x, hiter) | |
3033 | { | |
3034 | unsigned length = 0; | |
3035 | tree_scc *s = scc; | |
3036 | for (; s; s = s->next) | |
3037 | length++; | |
3038 | if (length > max_length) | |
3039 | { | |
3040 | max_length = length; | |
3041 | max_scc = scc; | |
3042 | } | |
3043 | } | |
3044 | fprintf (stderr, "[%s] tree SCC max chain length %u (size %u)\n", | |
3045 | pfx, max_length, max_scc->len); | |
3046 | fprintf (stderr, "[%s] Compared %lu SCCs, %lu collisions (%f)\n", pfx, | |
3047 | num_scc_compares, num_scc_compare_collisions, | |
3048 | num_scc_compare_collisions / (double) num_scc_compares); | |
3049 | fprintf (stderr, "[%s] Merged %lu SCCs\n", pfx, num_sccs_merged); | |
3050 | fprintf (stderr, "[%s] Merged %lu tree bodies\n", pfx, | |
3051 | total_scc_size_merged); | |
3052 | fprintf (stderr, "[%s] Merged %lu types\n", pfx, num_merged_types); | |
3053 | fprintf (stderr, "[%s] %lu types prevailed (%lu associated trees)\n", | |
3054 | pfx, num_prevailing_types, num_type_scc_trees); | |
3055 | fprintf (stderr, "[%s] GIMPLE canonical type table: size %ld, " | |
3056 | "%ld elements, %ld searches, %ld collisions (ratio: %f)\n", pfx, | |
3057 | (long) htab_size (gimple_canonical_types), | |
3058 | (long) htab_elements (gimple_canonical_types), | |
3059 | (long) gimple_canonical_types->searches, | |
3060 | (long) gimple_canonical_types->collisions, | |
3061 | htab_collisions (gimple_canonical_types)); | |
3062 | fprintf (stderr, "[%s] GIMPLE canonical type pointer-map: " | |
3063 | "%lu elements, %ld searches\n", pfx, | |
3064 | num_canonical_type_hash_entries, | |
3065 | num_canonical_type_hash_queries); | |
3066 | } | |
3067 | ||
3068 | print_lto_report (pfx); | |
3069 | } | |
3070 | ||
3071 | GTY(()) tree lto_eh_personality_decl; | |
3072 | ||
3073 | /* Return the LTO personality function decl. */ | |
3074 | ||
3075 | tree | |
3076 | lto_eh_personality (void) | |
3077 | { | |
3078 | if (!lto_eh_personality_decl) | |
3079 | { | |
3080 | /* Use the first personality DECL for our personality if we don't | |
3081 | support multiple ones. This ensures that we don't artificially | |
3082 | create the need for them in a single-language program. */ | |
3083 | if (first_personality_decl && !dwarf2out_do_cfi_asm ()) | |
3084 | lto_eh_personality_decl = first_personality_decl; | |
3085 | else | |
3086 | lto_eh_personality_decl = lhd_gcc_personality (); | |
3087 | } | |
3088 | ||
3089 | return lto_eh_personality_decl; | |
3090 | } | |
3091 | ||
ee7a003f | 3092 | /* Set the process name based on the LTO mode. */ |
a79420f9 | 3093 | |
ee7a003f | 3094 | static void |
a79420f9 ML |
3095 | lto_process_name (void) |
3096 | { | |
3097 | if (flag_lto) | |
3098 | setproctitle (flag_incremental_link == INCREMENTAL_LINK_LTO | |
3099 | ? "lto1-inclink" : "lto1-lto"); | |
3100 | if (flag_wpa) | |
3101 | setproctitle ("lto1-wpa"); | |
3102 | if (flag_ltrans) | |
3103 | setproctitle ("lto1-ltrans"); | |
3104 | } | |
3105 | ||
3106 | ||
3107 | /* Initialize the LTO front end. */ | |
3108 | ||
3109 | void | |
3110 | lto_fe_init (void) | |
3111 | { | |
3112 | lto_process_name (); | |
3113 | lto_streamer_hooks_init (); | |
3114 | lto_reader_init (); | |
3115 | lto_set_in_hooks (NULL, get_section_data, free_section_data); | |
3116 | memset (<o_stats, 0, sizeof (lto_stats)); | |
3117 | bitmap_obstack_initialize (NULL); | |
3118 | gimple_register_cfg_hooks (); | |
a79420f9 ML |
3119 | } |
3120 | ||
3121 | #include "gt-lto-lto-common.h" |