Line data Source code
1 : /* A type-safe hash table template.
2 : Copyright (C) 2012-2026 Free Software Foundation, Inc.
3 : Contributed by Lawrence Crowl <crowl@google.com>
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 :
22 : /* This file implements a typed hash table.
23 : The implementation borrows from libiberty's htab_t in hashtab.h.
24 :
25 :
26 : INTRODUCTION TO TYPES
27 :
28 : Users of the hash table generally need to be aware of three types.
29 :
30 : 1. The type being placed into the hash table. This type is called
31 : the value type.
32 :
33 : 2. The type used to describe how to handle the value type within
34 : the hash table. This descriptor type provides the hash table with
35 : several things.
36 :
37 : - A typedef named 'value_type' to the value type (from above).
38 : Provided a suitable Descriptor class it may be a user-defined,
39 : non-POD type.
40 :
41 : - A static member function named 'hash' that takes a value_type
42 : (or 'const value_type &') and returns a hashval_t value.
43 :
44 : - A typedef named 'compare_type' that is used to test when a value
45 : is found. This type is the comparison type. Usually, it will be
46 : the same as value_type and may be a user-defined, non-POD type.
47 : If it is not the same type, you must generally explicitly compute
48 : hash values and pass them to the hash table.
49 :
50 : - A static member function named 'equal' that takes a value_type
51 : and a compare_type, and returns a bool. Both arguments can be
52 : const references.
53 :
54 : - A static function named 'remove' that takes an value_type pointer
55 : and frees the memory allocated by it. This function is used when
56 : individual elements of the table need to be disposed of (e.g.,
57 : when deleting a hash table, removing elements from the table, etc).
58 :
59 : - An optional static function named 'keep_cache_entry'. This
60 : function is provided only for garbage-collected elements that
61 : are not marked by the normal gc mark pass. It describes what
62 : what should happen to the element at the end of the gc mark phase.
63 : The return value should be:
64 : - 0 if the element should be deleted
65 : - 1 if the element should be kept and needs to be marked
66 : - -1 if the element should be kept and is already marked.
67 : Returning -1 rather than 1 is purely an optimization.
68 :
69 : 3. The type of the hash table itself. (More later.)
70 :
71 : In very special circumstances, users may need to know about a fourth type.
72 :
73 : 4. The template type used to describe how hash table memory
74 : is allocated. This type is called the allocator type. It is
75 : parameterized on the value type. It provides two functions:
76 :
77 : - A static member function named 'data_alloc'. This function
78 : allocates the data elements in the table.
79 :
80 : - A static member function named 'data_free'. This function
81 : deallocates the data elements in the table.
82 :
83 : Hash table are instantiated with two type arguments.
84 :
85 : * The descriptor type, (2) above.
86 :
87 : * The allocator type, (4) above. In general, you will not need to
88 : provide your own allocator type. By default, hash tables will use
89 : the class template xcallocator, which uses malloc/free for allocation.
90 :
91 :
92 : DEFINING A DESCRIPTOR TYPE
93 :
94 : The first task in using the hash table is to describe the element type.
95 : We compose this into a few steps.
96 :
97 : 1. Decide on a removal policy for values stored in the table.
98 : hash-traits.h provides class templates for the four most common
99 : policies:
100 :
101 : * typed_free_remove implements the static 'remove' member function
102 : by calling free().
103 :
104 : * typed_noop_remove implements the static 'remove' member function
105 : by doing nothing.
106 :
107 : * ggc_remove implements the static 'remove' member by doing nothing,
108 : but instead provides routines for gc marking and for PCH streaming.
109 : Use this for garbage-collected data that needs to be preserved across
110 : collections.
111 :
112 : * ggc_cache_remove is like ggc_remove, except that it does not
113 : mark the entries during the normal gc mark phase. Instead it
114 : uses 'keep_cache_entry' (described above) to keep elements that
115 : were not collected and delete those that were. Use this for
116 : garbage-collected caches that should not in themselves stop
117 : the data from being collected.
118 :
119 : You can use these policies by simply deriving the descriptor type
120 : from one of those class template, with the appropriate argument.
121 :
122 : Otherwise, you need to write the static 'remove' member function
123 : in the descriptor class.
124 :
125 : 2. Choose a hash function. Write the static 'hash' member function.
126 :
127 : 3. Decide whether the lookup function should take as input an object
128 : of type value_type or something more restricted. Define compare_type
129 : accordingly.
130 :
131 : 4. Choose an equality testing function 'equal' that compares a value_type
132 : and a compare_type.
133 :
134 : If your elements are pointers, it is usually easiest to start with one
135 : of the generic pointer descriptors described below and override the bits
136 : you need to change.
137 :
138 : AN EXAMPLE DESCRIPTOR TYPE
139 :
140 : Suppose you want to put some_type into the hash table. You could define
141 : the descriptor type as follows.
142 :
143 : struct some_type_hasher : nofree_ptr_hash <some_type>
144 : // Deriving from nofree_ptr_hash means that we get a 'remove' that does
145 : // nothing. This choice is good for raw values.
146 : {
147 : static inline hashval_t hash (const value_type *);
148 : static inline bool equal (const value_type *, const compare_type *);
149 : };
150 :
151 : inline hashval_t
152 : some_type_hasher::hash (const value_type *e)
153 : { ... compute and return a hash value for E ... }
154 :
155 : inline bool
156 : some_type_hasher::equal (const value_type *p1, const compare_type *p2)
157 : { ... compare P1 vs P2. Return true if they are the 'same' ... }
158 :
159 :
160 : AN EXAMPLE HASH_TABLE DECLARATION
161 :
162 : To instantiate a hash table for some_type:
163 :
164 : hash_table <some_type_hasher> some_type_hash_table;
165 :
166 : There is no need to mention some_type directly, as the hash table will
167 : obtain it using some_type_hasher::value_type.
168 :
169 : You can then use any of the functions in hash_table's public interface.
170 : See hash_table for details. The interface is very similar to libiberty's
171 : htab_t.
172 :
173 : If a hash table is used only in some rare cases, it is possible
174 : to construct the hash_table lazily before first use. This is done
175 : through:
176 :
177 : hash_table <some_type_hasher, true> some_type_hash_table;
178 :
179 : which will cause whatever methods actually need the allocated entries
180 : array to allocate it later.
181 :
182 :
183 : EASY DESCRIPTORS FOR POINTERS
184 :
185 : There are four descriptors for pointer elements, one for each of
186 : the removal policies above:
187 :
188 : * nofree_ptr_hash (based on typed_noop_remove)
189 : * free_ptr_hash (based on typed_free_remove)
190 : * ggc_ptr_hash (based on ggc_remove)
191 : * ggc_cache_ptr_hash (based on ggc_cache_remove)
192 :
193 : These descriptors hash and compare elements by their pointer value,
194 : rather than what they point to. So, to instantiate a hash table over
195 : pointers to whatever_type, without freeing the whatever_types, use:
196 :
197 : hash_table <nofree_ptr_hash <whatever_type> > whatever_type_hash_table;
198 :
199 :
200 : HASH TABLE ITERATORS
201 :
202 : The hash table provides standard C++ iterators. For example, consider a
203 : hash table of some_info. We wish to consume each element of the table:
204 :
205 : extern void consume (some_info *);
206 :
207 : We define a convenience typedef and the hash table:
208 :
209 : typedef hash_table <some_info_hasher> info_table_type;
210 : info_table_type info_table;
211 :
212 : Then we write the loop in typical C++ style:
213 :
214 : for (info_table_type::iterator iter = info_table.begin ();
215 : iter != info_table.end ();
216 : ++iter)
217 : if ((*iter).status == INFO_READY)
218 : consume (&*iter);
219 :
220 : Or with common sub-expression elimination:
221 :
222 : for (info_table_type::iterator iter = info_table.begin ();
223 : iter != info_table.end ();
224 : ++iter)
225 : {
226 : some_info &elem = *iter;
227 : if (elem.status == INFO_READY)
228 : consume (&elem);
229 : }
230 :
231 : One can also use a more typical GCC style:
232 :
233 : typedef some_info *some_info_p;
234 : some_info *elem_ptr;
235 : info_table_type::iterator iter;
236 : FOR_EACH_HASH_TABLE_ELEMENT (info_table, elem_ptr, some_info_p, iter)
237 : if (elem_ptr->status == INFO_READY)
238 : consume (elem_ptr);
239 :
240 : */
241 :
242 :
243 : #ifndef TYPED_HASHTAB_H
244 : #define TYPED_HASHTAB_H
245 :
246 : #include "statistics.h"
247 : #include "ggc.h"
248 : #include "vec.h"
249 : #include "hashtab.h"
250 : #include "inchash.h"
251 : #include "mem-stats-traits.h"
252 : #include "hash-traits.h"
253 : #include "hash-map-traits.h"
254 :
255 : template<typename, typename, typename> class hash_map;
256 : template<typename, bool, typename> class hash_set;
257 :
258 : /* The ordinary memory allocator. */
259 : /* FIXME (crowl): This allocator may be extracted for wider sharing later. */
260 :
261 : template <typename Type>
262 : struct xcallocator
263 : {
264 : static Type *data_alloc (size_t count);
265 : static void data_free (Type *memory);
266 : };
267 :
268 :
269 : /* Allocate memory for COUNT data blocks. */
270 :
271 : template <typename Type>
272 : inline Type *
273 9607788355 : xcallocator <Type>::data_alloc (size_t count)
274 : {
275 9607788355 : return static_cast <Type *> (xcalloc (count, sizeof (Type)));
276 : }
277 :
278 :
279 : /* Free memory for data blocks. */
280 :
281 : template <typename Type>
282 : inline void
283 9605719686 : xcallocator <Type>::data_free (Type *memory)
284 : {
285 9605719686 : return ::free (memory);
286 : }
287 :
288 :
289 : /* Table of primes and their inversion information. */
290 :
291 : struct prime_ent
292 : {
293 : hashval_t prime;
294 : hashval_t inv;
295 : hashval_t inv_m2; /* inverse of prime-2 */
296 : hashval_t shift;
297 : };
298 :
299 : extern struct prime_ent const prime_tab[];
300 :
301 : /* Limit number of comparisons when calling hash_table<>::verify. */
302 : extern unsigned int hash_table_sanitize_eq_limit;
303 :
304 : /* Functions for computing hash table indexes. */
305 :
306 : extern unsigned int hash_table_higher_prime_index (unsigned long n)
307 : ATTRIBUTE_PURE;
308 :
309 : extern ATTRIBUTE_NORETURN ATTRIBUTE_COLD void hashtab_chk_error ();
310 :
311 : /* Return X % Y using multiplicative inverse values INV and SHIFT.
312 :
313 : The multiplicative inverses computed above are for 32-bit types,
314 : and requires that we be able to compute a highpart multiply.
315 :
316 : FIX: I am not at all convinced that
317 : 3 loads, 2 multiplications, 3 shifts, and 3 additions
318 : will be faster than
319 : 1 load and 1 modulus
320 : on modern systems running a compiler. */
321 :
322 : inline hashval_t
323 >25392*10^7 : mul_mod (hashval_t x, hashval_t y, hashval_t inv, int shift)
324 : {
325 >25392*10^7 : hashval_t t1, t2, t3, t4, q, r;
326 :
327 >25392*10^7 : t1 = ((uint64_t)x * inv) >> 32;
328 >25392*10^7 : t2 = x - t1;
329 >25392*10^7 : t3 = t2 >> 1;
330 >25392*10^7 : t4 = t1 + t3;
331 >25392*10^7 : q = t4 >> shift;
332 >25392*10^7 : r = x - (q * y);
333 :
334 >25392*10^7 : return r;
335 : }
336 :
337 : /* Compute the primary table index for HASH given current prime index. */
338 :
339 : inline hashval_t
340 >15824*10^7 : hash_table_mod1 (hashval_t hash, unsigned int index)
341 : {
342 >15824*10^7 : const struct prime_ent *p = &prime_tab[index];
343 >15824*10^7 : gcc_checking_assert (sizeof (hashval_t) * CHAR_BIT <= 32);
344 >15824*10^7 : return mul_mod (hash, p->prime, p->inv, p->shift);
345 : }
346 :
347 : /* Compute the secondary table index for HASH given current prime index. */
348 :
349 : inline hashval_t
350 95684952977 : hash_table_mod2 (hashval_t hash, unsigned int index)
351 : {
352 95684952977 : const struct prime_ent *p = &prime_tab[index];
353 95684952977 : gcc_checking_assert (sizeof (hashval_t) * CHAR_BIT <= 32);
354 95684952977 : return 1 + mul_mod (hash, p->prime - 2, p->inv_m2, p->shift);
355 : }
356 :
357 : class mem_usage;
358 :
359 : /* User-facing hash table type.
360 :
361 : The table stores elements of type Descriptor::value_type and uses
362 : the static descriptor functions described at the top of the file
363 : to hash, compare and remove elements.
364 :
365 : Specify the template Allocator to allocate and free memory.
366 : The default is xcallocator.
367 :
368 : Storage is an implementation detail and should not be used outside the
369 : hash table code.
370 :
371 : */
372 : template <typename Descriptor, bool Lazy = false,
373 : template<typename Type> class Allocator = xcallocator>
374 : class hash_table
375 : {
376 : typedef typename Descriptor::value_type value_type;
377 : typedef typename Descriptor::compare_type compare_type;
378 :
379 : public:
380 : explicit hash_table (size_t, bool ggc = false,
381 : bool sanitize_eq_and_hash = true,
382 : bool gather_mem_stats = GATHER_STATISTICS,
383 : mem_alloc_origin origin = HASH_TABLE_ORIGIN
384 : CXX_MEM_STAT_INFO);
385 : explicit hash_table (const hash_table &, bool ggc = false,
386 : bool sanitize_eq_and_hash = true,
387 : bool gather_mem_stats = GATHER_STATISTICS,
388 : mem_alloc_origin origin = HASH_TABLE_ORIGIN
389 : CXX_MEM_STAT_INFO);
390 : ~hash_table ();
391 :
392 : /* Create a hash_table in gc memory. */
393 : static hash_table *
394 48613396 : create_ggc (size_t n, bool sanitize_eq_and_hash = true CXX_MEM_STAT_INFO)
395 : {
396 48613396 : hash_table *table = ggc_alloc<hash_table> ();
397 48613396 : new (table) hash_table (n, true, sanitize_eq_and_hash, GATHER_STATISTICS,
398 : HASH_TABLE_ORIGIN PASS_MEM_STAT);
399 48613396 : return table;
400 : }
401 :
402 : /* Current size (in entries) of the hash table. */
403 1301253860 : size_t size () const { return m_size; }
404 :
405 : /* Return the current number of elements in this hash table. */
406 2177727645 : size_t elements () const { return m_n_elements - m_n_deleted; }
407 :
408 : /* Return the current number of elements in this hash table. */
409 : size_t elements_with_deleted () const { return m_n_elements; }
410 :
411 : /* This function clears all entries in this hash table. */
412 1006627555 : void empty () { if (elements ()) empty_slow (); }
413 :
414 : /* Return true when there are no elements in this hash table. */
415 133607625 : bool is_empty () const { return elements () == 0; }
416 :
417 : /* This function clears a specified SLOT in a hash table. It is
418 : useful when you've already done the lookup and don't want to do it
419 : again. */
420 : void clear_slot (value_type *);
421 :
422 : /* This function searches for a hash table entry equal to the given
423 : COMPARABLE element starting with the given HASH value. It cannot
424 : be used to insert or delete an element. */
425 : value_type &find_with_hash (const compare_type &, hashval_t);
426 :
427 : /* Like find_slot_with_hash, but compute the hash value from the element. */
428 1896668727 : value_type &find (const value_type &value)
429 : {
430 1896668727 : return find_with_hash (value, Descriptor::hash (value));
431 : }
432 :
433 2873810784 : value_type *find_slot (const value_type &value, insert_option insert)
434 : {
435 2876214431 : return find_slot_with_hash (value, Descriptor::hash (value), insert);
436 : }
437 :
438 : /* This function searches for a hash table slot containing an entry
439 : equal to the given COMPARABLE element and starting with the given
440 : HASH. To delete an entry, call this with insert=NO_INSERT, then
441 : call clear_slot on the slot returned (possibly after doing some
442 : checks). To insert an entry, call this with insert=INSERT, then
443 : write the value you want into the returned slot. When inserting an
444 : entry, NULL may be returned if memory allocation fails. */
445 : value_type *find_slot_with_hash (const compare_type &comparable,
446 : hashval_t hash, enum insert_option insert);
447 :
448 : /* This function deletes an element with the given COMPARABLE value
449 : from hash table starting with the given HASH. If there is no
450 : matching element in the hash table, this function does nothing. */
451 : void remove_elt_with_hash (const compare_type &, hashval_t);
452 :
453 : /* Like remove_elt_with_hash, but compute the hash value from the
454 : element. */
455 593737 : void remove_elt (const value_type &value)
456 : {
457 593737 : remove_elt_with_hash (value, Descriptor::hash (value));
458 591341 : }
459 :
460 : /* This function scans over the entire hash table calling CALLBACK for
461 : each live entry. If CALLBACK returns false, the iteration stops.
462 : ARGUMENT is passed as CALLBACK's second argument. */
463 : template <typename Argument,
464 : int (*Callback) (value_type *slot, Argument argument)>
465 : void traverse_noresize (Argument argument);
466 :
467 : /* Like traverse_noresize, but does resize the table when it is too empty
468 : to improve effectivity of subsequent calls. */
469 : template <typename Argument,
470 : int (*Callback) (value_type *slot, Argument argument)>
471 : void traverse (Argument argument);
472 :
473 : class iterator
474 : {
475 : public:
476 3528679138 : iterator () : m_slot (NULL), m_limit (NULL) {}
477 :
478 305022614 : iterator (value_type *slot, value_type *limit) :
479 305022614 : m_slot (slot), m_limit (limit) {}
480 :
481 7820151 : inline value_type &operator * () { return *m_slot; }
482 : void slide ();
483 : inline iterator &operator ++ ();
484 5706393514 : bool operator != (const iterator &other) const
485 : {
486 1498747779 : return m_slot != other.m_slot || m_limit != other.m_limit;
487 : }
488 :
489 : private:
490 : value_type *m_slot;
491 : value_type *m_limit;
492 : };
493 :
494 305022618 : iterator begin () const
495 : {
496 8 : if (Lazy && m_entries == NULL)
497 4 : return iterator ();
498 305022614 : check_complete_insertion ();
499 305022614 : iterator iter (m_entries, m_entries + m_size);
500 305022614 : iter.slide ();
501 305022614 : return iter;
502 : }
503 :
504 2687405361 : iterator end () const { return iterator (); }
505 :
506 287 : double collisions () const
507 : {
508 287 : return m_searches ? static_cast <double> (m_collisions) / m_searches : 0;
509 : }
510 :
511 : private:
512 : /* FIXME: Make the class assignable. See pr90959. */
513 : void operator= (hash_table&);
514 :
515 : template<typename T> friend void gt_ggc_mx (hash_table<T> *);
516 : template<typename T> friend void gt_pch_nx (hash_table<T> *);
517 : template<typename T> friend void
518 : hashtab_entry_note_pointers (void *, void *, gt_pointer_operator, void *);
519 : template<typename T, typename U, typename V> friend void
520 : gt_pch_nx (hash_map<T, U, V> *, gt_pointer_operator, void *);
521 : template<typename T, typename U>
522 : friend void gt_pch_nx (hash_set<T, false, U> *, gt_pointer_operator, void *);
523 : template<typename T> friend void gt_pch_nx (hash_table<T> *,
524 : gt_pointer_operator, void *);
525 :
526 : template<typename T> friend void gt_cleare_cache (hash_table<T> *);
527 :
528 : void empty_slow ();
529 :
530 : value_type *alloc_entries (size_t n CXX_MEM_STAT_INFO) const;
531 : value_type *find_empty_slot_for_expand (hashval_t);
532 : void verify (const compare_type &comparable, hashval_t hash);
533 : bool too_empty_p (unsigned int);
534 : void expand ();
535 >71195*10^7 : static bool is_deleted (value_type &v)
536 : {
537 : /* Traits are supposed to avoid recognizing elements as both empty
538 : and deleted, but to fail safe in case custom traits fail to do
539 : that, make sure we never test for is_deleted without having
540 : first ruled out is_empty. */
541 >71195*10^7 : gcc_checking_assert (!Descriptor::is_empty (v));
542 >71195*10^7 : return Descriptor::is_deleted (v);
543 : }
544 :
545 >18096*10^8 : static bool is_empty (value_type &v)
546 : {
547 >11626*10^7 : return Descriptor::is_empty (v);
548 : }
549 :
550 715448605 : static void mark_deleted (value_type &v)
551 : {
552 715448605 : Descriptor::mark_deleted (v);
553 : /* Traits are supposed to refuse to set elements as deleted if
554 : those would be indistinguishable from empty, but to fail safe
555 : in case custom traits fail to do that, check that the
556 : just-deleted element does not look empty. */
557 0 : gcc_checking_assert (!Descriptor::is_empty (v));
558 1666762 : }
559 :
560 1947060210 : static void mark_empty (value_type &v)
561 : {
562 1947060210 : Descriptor::mark_empty (v);
563 : }
564 :
565 : public:
566 >13732*10^7 : void check_complete_insertion () const
567 : {
568 : #if CHECKING_P
569 >13732*10^7 : if (!m_inserting_slot)
570 : return;
571 :
572 48516255859 : gcc_checking_assert (m_inserting_slot >= &m_entries[0]
573 : && m_inserting_slot < &m_entries[m_size]);
574 :
575 48516255859 : if (!is_empty (*m_inserting_slot))
576 48516255859 : m_inserting_slot = NULL;
577 : else
578 0 : gcc_unreachable ();
579 : #endif
580 : }
581 :
582 : private:
583 47871537657 : value_type *check_insert_slot (value_type *ret)
584 : {
585 : #if CHECKING_P
586 7759561490 : gcc_checking_assert (is_empty (*ret));
587 48530853446 : m_inserting_slot = ret;
588 : #endif
589 67323 : return ret;
590 : }
591 :
592 : #if CHECKING_P
593 : mutable value_type *m_inserting_slot;
594 : #endif
595 :
596 : /* Table itself. */
597 : value_type *m_entries;
598 :
599 : size_t m_size;
600 :
601 : /* Current number of elements including also deleted elements. */
602 : size_t m_n_elements;
603 :
604 : /* Current number of deleted elements in the table. */
605 : size_t m_n_deleted;
606 :
607 : /* The following member is used for debugging. Its value is number
608 : of all calls of `htab_find_slot' for the hash table. */
609 : unsigned int m_searches;
610 :
611 : /* The following member is used for debugging. Its value is number
612 : of collisions fixed for time of work with the hash table. */
613 : unsigned int m_collisions;
614 :
615 : /* Current size (in entries) of the hash table, as an index into the
616 : table of primes. */
617 : unsigned int m_size_prime_index;
618 :
619 : /* if m_entries is stored in ggc memory. */
620 : bool m_ggc;
621 :
622 : /* True if the table should be sanitized for equal and hash functions. */
623 : bool m_sanitize_eq_and_hash;
624 :
625 : /* If we should gather memory statistics for the table. */
626 : #if GATHER_STATISTICS
627 : bool m_gather_mem_stats;
628 : #else
629 : static const bool m_gather_mem_stats = false;
630 : #endif
631 : };
632 :
633 : /* As mem-stats.h heavily utilizes hash maps (hash tables), we have to include
634 : mem-stats.h after hash_table declaration. */
635 :
636 : #include "mem-stats.h"
637 : #include "hash-map.h"
638 :
639 : extern mem_alloc_description<mem_usage>& hash_table_usage (void);
640 :
641 : /* Support function for statistics. */
642 : extern void dump_hash_table_loc_statistics (void);
643 :
644 : template<typename Descriptor, bool Lazy,
645 : template<typename Type> class Allocator>
646 8628021426 : hash_table<Descriptor, Lazy, Allocator>::hash_table (size_t size, bool ggc,
647 : bool sanitize_eq_and_hash,
648 : bool gather_mem_stats
649 : ATTRIBUTE_UNUSED,
650 : mem_alloc_origin origin
651 : MEM_STAT_DECL) :
652 : #if CHECKING_P
653 8628021426 : m_inserting_slot (0),
654 : #endif
655 8628021426 : m_n_elements (0), m_n_deleted (0), m_searches (0), m_collisions (0),
656 8628021426 : m_ggc (ggc), m_sanitize_eq_and_hash (sanitize_eq_and_hash)
657 : #if GATHER_STATISTICS
658 : , m_gather_mem_stats (gather_mem_stats)
659 : #endif
660 : {
661 : unsigned int size_prime_index;
662 :
663 8628021426 : size_prime_index = hash_table_higher_prime_index (size);
664 8628021426 : size = prime_tab[size_prime_index].prime;
665 :
666 : if (m_gather_mem_stats)
667 : hash_table_usage ().register_descriptor (this, origin, ggc
668 : FINAL_PASS_MEM_STAT);
669 :
670 : if (Lazy)
671 2490318 : m_entries = NULL;
672 : else
673 8625531108 : m_entries = alloc_entries (size PASS_MEM_STAT);
674 8628021426 : m_size = size;
675 8628021426 : m_size_prime_index = size_prime_index;
676 8625531108 : }
677 :
678 : template<typename Descriptor, bool Lazy,
679 : template<typename Type> class Allocator>
680 26996120 : hash_table<Descriptor, Lazy, Allocator>::hash_table (const hash_table &h,
681 : bool ggc,
682 : bool sanitize_eq_and_hash,
683 : bool gather_mem_stats
684 : ATTRIBUTE_UNUSED,
685 : mem_alloc_origin origin
686 : MEM_STAT_DECL) :
687 : #if CHECKING_P
688 26996120 : m_inserting_slot (0),
689 : #endif
690 26996120 : m_n_elements (h.m_n_elements), m_n_deleted (h.m_n_deleted),
691 26996120 : m_searches (0), m_collisions (0), m_ggc (ggc),
692 26996120 : m_sanitize_eq_and_hash (sanitize_eq_and_hash)
693 : #if GATHER_STATISTICS
694 : , m_gather_mem_stats (gather_mem_stats)
695 : #endif
696 : {
697 26996120 : h.check_complete_insertion ();
698 :
699 26996120 : size_t size = h.m_size;
700 :
701 : if (m_gather_mem_stats)
702 : hash_table_usage ().register_descriptor (this, origin, ggc
703 : FINAL_PASS_MEM_STAT);
704 :
705 : if (Lazy && h.m_entries == NULL)
706 : m_entries = NULL;
707 : else
708 : {
709 26996120 : value_type *nentries = alloc_entries (size PASS_MEM_STAT);
710 378842508 : for (size_t i = 0; i < size; ++i)
711 : {
712 351846388 : value_type &entry = h.m_entries[i];
713 351846388 : if (is_empty (entry))
714 332491584 : continue;
715 19354804 : else if (is_deleted (entry))
716 1660693 : mark_deleted (nentries[i]);
717 : else
718 17694111 : new ((void*) (nentries + i)) value_type (entry);
719 : }
720 26996120 : m_entries = nentries;
721 : }
722 26996120 : m_size = size;
723 26996120 : m_size_prime_index = h.m_size_prime_index;
724 26996120 : }
725 :
726 : template<typename Descriptor, bool Lazy,
727 : template<typename Type> class Allocator>
728 8606802412 : hash_table<Descriptor, Lazy, Allocator>::~hash_table ()
729 : {
730 8606802412 : check_complete_insertion ();
731 :
732 2490318 : if (!Lazy || m_entries)
733 : {
734 >18467*10^7 : for (size_t i = m_size - 1; i < m_size; i--)
735 >17607*10^7 : if (!is_empty (m_entries[i]) && !is_deleted (m_entries[i]))
736 1872424742 : Descriptor::remove (m_entries[i]);
737 :
738 8604837143 : if (!m_ggc)
739 8577041197 : Allocator <value_type> ::data_free (m_entries);
740 : else
741 27795946 : ggc_free (m_entries);
742 : if (m_gather_mem_stats)
743 : hash_table_usage ().release_instance_overhead (this,
744 : sizeof (value_type)
745 : * m_size, true);
746 : }
747 : else if (m_gather_mem_stats)
748 : hash_table_usage ().unregister_descriptor (this);
749 8606802412 : }
750 :
751 : /* This function returns an array of empty hash table elements. */
752 :
753 : template<typename Descriptor, bool Lazy,
754 : template<typename Type> class Allocator>
755 : inline typename hash_table<Descriptor, Lazy, Allocator>::value_type *
756 9715126735 : hash_table<Descriptor, Lazy,
757 : Allocator>::alloc_entries (size_t n MEM_STAT_DECL) const
758 : {
759 : value_type *nentries;
760 :
761 : if (m_gather_mem_stats)
762 : hash_table_usage ().register_instance_overhead (sizeof (value_type) * n, this);
763 :
764 9715126735 : if (!m_ggc)
765 9607788355 : nentries = Allocator <value_type> ::data_alloc (n);
766 : else
767 107338380 : nentries = ::ggc_cleared_vec_alloc<value_type> (n PASS_MEM_STAT);
768 :
769 139163023 : gcc_assert (nentries != NULL);
770 : if (!Descriptor::empty_zero_p)
771 1707927134 : for (size_t i = 0; i < n; i++)
772 1675099858 : mark_empty (nentries[i]);
773 :
774 9715126735 : return nentries;
775 : }
776 :
777 : /* Similar to find_slot, but without several unwanted side effects:
778 : - Does not call equal when it finds an existing entry.
779 : - Does not change the count of elements/searches/collisions in the
780 : hash table.
781 : This function also assumes there are no deleted entries in the table.
782 : HASH is the hash value for the element to be inserted. */
783 :
784 : template<typename Descriptor, bool Lazy,
785 : template<typename Type> class Allocator>
786 : typename hash_table<Descriptor, Lazy, Allocator>::value_type *
787 31262954858 : hash_table<Descriptor, Lazy,
788 : Allocator>::find_empty_slot_for_expand (hashval_t hash)
789 : {
790 31262954858 : hashval_t index = hash_table_mod1 (hash, m_size_prime_index);
791 31262954858 : size_t size = m_size;
792 31262954858 : value_type *slot = m_entries + index;
793 : hashval_t hash2;
794 :
795 31262969177 : if (is_empty (*slot))
796 : return slot;
797 4939729296 : gcc_checking_assert (!is_deleted (*slot));
798 :
799 4939729296 : hash2 = hash_table_mod2 (hash, m_size_prime_index);
800 : for (;;)
801 : {
802 6957212729 : index += hash2;
803 6957212729 : if (index >= size)
804 3326470424 : index -= size;
805 :
806 6957212729 : slot = m_entries + index;
807 6957273240 : if (is_empty (*slot))
808 : return slot;
809 2017483433 : gcc_checking_assert (!is_deleted (*slot));
810 : }
811 : }
812 :
813 : /* Return true if the current table is excessively big for ELTS elements. */
814 :
815 : template<typename Descriptor, bool Lazy,
816 : template<typename Type> class Allocator>
817 : inline bool
818 517514961 : hash_table<Descriptor, Lazy, Allocator>::too_empty_p (unsigned int elts)
819 : {
820 251364413 : return elts * 8 < m_size && m_size > 32;
821 : }
822 :
823 : /* The following function changes size of memory allocated for the
824 : entries and repeatedly inserts the table elements. The occupancy
825 : of the table after the call will be about 50%. Naturally the hash
826 : table must already exist. Remember also that the place of the
827 : table entries is changed. If memory allocation fails, this function
828 : will abort. */
829 :
830 : template<typename Descriptor, bool Lazy,
831 : template<typename Type> class Allocator>
832 : void
833 1053852232 : hash_table<Descriptor, Lazy, Allocator>::expand ()
834 : {
835 1053852232 : check_complete_insertion ();
836 :
837 1053852232 : value_type *oentries = m_entries;
838 1053852232 : unsigned int oindex = m_size_prime_index;
839 1053852232 : size_t osize = size ();
840 1053852232 : value_type *olimit = oentries + osize;
841 1053852232 : size_t elts = elements ();
842 :
843 : /* Resize only when table after removal of unused elements is either
844 : too full or too empty. */
845 : unsigned int nindex;
846 : size_t nsize;
847 1053852232 : if (elts * 2 > osize || too_empty_p (elts))
848 : {
849 1045754754 : nindex = hash_table_higher_prime_index (elts * 2);
850 1045754754 : nsize = prime_tab[nindex].prime;
851 : }
852 : else
853 : {
854 : nindex = oindex;
855 : nsize = osize;
856 : }
857 :
858 1053852232 : value_type *nentries = alloc_entries (nsize);
859 :
860 : if (m_gather_mem_stats)
861 : hash_table_usage ().release_instance_overhead (this, sizeof (value_type)
862 : * osize);
863 :
864 1053852232 : size_t n_deleted = m_n_deleted;
865 :
866 1053852232 : m_entries = nentries;
867 1053852232 : m_size = nsize;
868 1053852232 : m_size_prime_index = nindex;
869 1053852232 : m_n_elements -= m_n_deleted;
870 1053852232 : m_n_deleted = 0;
871 :
872 1053852232 : size_t n_elements = m_n_elements;
873 :
874 1053852232 : value_type *p = oentries;
875 : do
876 : {
877 41802595848 : value_type &x = *p;
878 :
879 41802670678 : if (is_empty (x))
880 : ;
881 31487800327 : else if (is_deleted (x))
882 224845469 : n_deleted--;
883 : else
884 : {
885 31262954858 : n_elements--;
886 31264702094 : value_type *q = find_empty_slot_for_expand (Descriptor::hash (x));
887 31262954858 : new ((void*) q) value_type (std::move (x));
888 : /* After the resources of 'x' have been moved to a new object at 'q',
889 : we now have to destroy the 'x' object, to end its lifetime. */
890 31262954858 : x.~value_type ();
891 : }
892 :
893 41802595848 : p++;
894 : }
895 41802595848 : while (p < olimit);
896 :
897 1053852232 : gcc_checking_assert (!n_elements && !n_deleted);
898 :
899 1053852232 : if (!m_ggc)
900 1027709595 : Allocator <value_type> ::data_free (oentries);
901 : else
902 26142637 : ggc_free (oentries);
903 1053852232 : }
904 :
905 : /* Implements empty() in cases where it isn't a no-op. */
906 :
907 : template<typename Descriptor, bool Lazy,
908 : template<typename Type> class Allocator>
909 : void
910 230567694 : hash_table<Descriptor, Lazy, Allocator>::empty_slow ()
911 : {
912 230567694 : check_complete_insertion ();
913 :
914 230567694 : size_t size = m_size;
915 230567694 : size_t nsize = size;
916 230567694 : value_type *entries = m_entries;
917 :
918 16436216800 : for (size_t i = size - 1; i < size; i--)
919 16205649106 : if (!is_empty (entries[i]) && !is_deleted (entries[i]))
920 45389123 : Descriptor::remove (entries[i]);
921 :
922 : /* Instead of clearing megabyte, downsize the table. */
923 230567694 : if (size > 1024*1024 / sizeof (value_type))
924 : nsize = 1024 / sizeof (value_type);
925 230567674 : else if (too_empty_p (m_n_elements))
926 8222206 : nsize = m_n_elements * 2;
927 :
928 230567674 : if (nsize != size)
929 : {
930 8222226 : unsigned int nindex = hash_table_higher_prime_index (nsize);
931 :
932 8222226 : nsize = prime_tab[nindex].prime;
933 :
934 8222226 : if (!m_ggc)
935 968894 : Allocator <value_type> ::data_free (m_entries);
936 : else
937 7253332 : ggc_free (m_entries);
938 :
939 8222226 : m_entries = alloc_entries (nsize);
940 8222226 : m_size = nsize;
941 8222226 : m_size_prime_index = nindex;
942 : }
943 : else if (Descriptor::empty_zero_p)
944 222344150 : memset ((void *) entries, 0, size * sizeof (value_type));
945 : else
946 18644 : for (size_t i = 0; i < size; i++)
947 17326 : mark_empty (entries[i]);
948 :
949 230567694 : m_n_deleted = 0;
950 230567694 : m_n_elements = 0;
951 230567694 : }
952 :
953 : /* This function clears a specified SLOT in a hash table. It is
954 : useful when you've already done the lookup and don't want to do it
955 : again. */
956 :
957 : template<typename Descriptor, bool Lazy,
958 : template<typename Type> class Allocator>
959 : void
960 620399920 : hash_table<Descriptor, Lazy, Allocator>::clear_slot (value_type *slot)
961 : {
962 620399920 : check_complete_insertion ();
963 :
964 620399920 : gcc_checking_assert (!(slot < m_entries || slot >= m_entries + size ()
965 : || is_empty (*slot) || is_deleted (*slot)));
966 :
967 620399920 : Descriptor::remove (*slot);
968 :
969 620399920 : mark_deleted (*slot);
970 620399920 : m_n_deleted++;
971 620399920 : }
972 :
973 : /* This function searches for a hash table entry equal to the given
974 : COMPARABLE element starting with the given HASH value. It cannot
975 : be used to insert or delete an element. */
976 :
977 : template<typename Descriptor, bool Lazy,
978 : template<typename Type> class Allocator>
979 : typename hash_table<Descriptor, Lazy, Allocator>::value_type &
980 50040068083 : hash_table<Descriptor, Lazy, Allocator>
981 : ::find_with_hash (const compare_type &comparable, hashval_t hash)
982 : {
983 50040068083 : m_searches++;
984 50040068083 : size_t size = m_size;
985 50040068083 : hashval_t index = hash_table_mod1 (hash, m_size_prime_index);
986 :
987 : if (Lazy && m_entries == NULL)
988 : m_entries = alloc_entries (size);
989 :
990 50040068083 : check_complete_insertion ();
991 :
992 : #if CHECKING_P
993 50040068083 : if (m_sanitize_eq_and_hash)
994 50040068083 : verify (comparable, hash);
995 : #endif
996 :
997 50040068083 : value_type *entry = &m_entries[index];
998 50042005968 : if (is_empty (*entry)
999 50064458555 : || (!is_deleted (*entry) && Descriptor::equal (*entry, comparable)))
1000 1090805621 : return *entry;
1001 :
1002 13805076664 : hashval_t hash2 = hash_table_mod2 (hash, m_size_prime_index);
1003 : for (;;)
1004 : {
1005 28440166149 : m_collisions++;
1006 28440166149 : index += hash2;
1007 28440166149 : if (index >= size)
1008 13848091763 : index -= size;
1009 :
1010 28440166149 : entry = &m_entries[index];
1011 28473713717 : if (is_empty (*entry)
1012 28479440066 : || (!is_deleted (*entry) && Descriptor::equal (*entry, comparable)))
1013 : return *entry;
1014 : }
1015 : }
1016 :
1017 : /* This function searches for a hash table slot containing an entry
1018 : equal to the given COMPARABLE element and starting with the given
1019 : HASH. To delete an entry, call this with insert=NO_INSERT, then
1020 : call clear_slot on the slot returned (possibly after doing some
1021 : checks). To insert an entry, call this with insert=INSERT, then
1022 : write the value you want into the returned slot. When inserting an
1023 : entry, NULL may be returned if memory allocation fails. */
1024 :
1025 : template<typename Descriptor, bool Lazy,
1026 : template<typename Type> class Allocator>
1027 : typename hash_table<Descriptor, Lazy, Allocator>::value_type *
1028 76940147021 : hash_table<Descriptor, Lazy, Allocator>
1029 : ::find_slot_with_hash (const compare_type &comparable, hashval_t hash,
1030 : enum insert_option insert)
1031 : {
1032 1713998 : if (Lazy && m_entries == NULL)
1033 : {
1034 525053 : if (insert == INSERT)
1035 525049 : m_entries = alloc_entries (m_size);
1036 : else
1037 : return NULL;
1038 : }
1039 76940147017 : if (insert == INSERT && m_size * 3 <= m_n_elements * 4)
1040 1052569405 : expand ();
1041 : else
1042 75887577612 : check_complete_insertion ();
1043 :
1044 : #if CHECKING_P
1045 76940147017 : if (m_sanitize_eq_and_hash)
1046 76107712342 : verify (comparable, hash);
1047 : #endif
1048 :
1049 76940147017 : m_searches++;
1050 76940147017 : value_type *first_deleted_slot = NULL;
1051 76940147017 : hashval_t index = hash_table_mod1 (hash, m_size_prime_index);
1052 76940147017 : hashval_t hash2 = hash_table_mod2 (hash, m_size_prime_index);
1053 76940147017 : value_type *entry = &m_entries[index];
1054 76940147017 : size_t size = m_size;
1055 76940147017 : if (is_empty (*entry))
1056 43817666280 : goto empty_entry;
1057 33122480737 : else if (is_deleted (*entry))
1058 19030672 : first_deleted_slot = &m_entries[index];
1059 32846180310 : else if (Descriptor::equal (*entry, comparable))
1060 2554014583 : return &m_entries[index];
1061 :
1062 : for (;;)
1063 : {
1064 43775543292 : m_collisions++;
1065 43775543292 : index += hash2;
1066 43775543292 : if (index >= size)
1067 21002734763 : index -= size;
1068 :
1069 43775543292 : entry = &m_entries[index];
1070 43775543292 : if (is_empty (*entry))
1071 17143121947 : goto empty_entry;
1072 26632421345 : else if (is_deleted (*entry))
1073 : {
1074 274165919 : if (!first_deleted_slot)
1075 21718893811 : first_deleted_slot = &m_entries[index];
1076 : }
1077 26370266026 : else if (Descriptor::equal (*entry, comparable))
1078 1251415314 : return &m_entries[index];
1079 : }
1080 :
1081 60960788227 : empty_entry:
1082 60960788227 : if (insert == NO_INSERT)
1083 : return NULL;
1084 :
1085 48530853446 : if (first_deleted_slot)
1086 : {
1087 271943026 : m_n_deleted--;
1088 271943026 : mark_empty (*first_deleted_slot);
1089 271943026 : return check_insert_slot (first_deleted_slot);
1090 : }
1091 :
1092 48258910420 : m_n_elements++;
1093 48258910420 : return check_insert_slot (&m_entries[index]);
1094 : }
1095 :
1096 : /* Verify that all existing elements in the hash table which are
1097 : equal to COMPARABLE have an equal HASH value provided as argument.
1098 : Also check that the hash table element counts are correct. */
1099 :
1100 : template<typename Descriptor, bool Lazy,
1101 : template<typename Type> class Allocator>
1102 : void
1103 >12614*10^7 : hash_table<Descriptor, Lazy, Allocator>
1104 : ::verify (const compare_type &comparable, hashval_t hash)
1105 : {
1106 >12614*10^7 : size_t n_elements = m_n_elements;
1107 >12614*10^7 : size_t n_deleted = m_n_deleted;
1108 >13844*10^8 : for (size_t i = 0; i < MIN (hash_table_sanitize_eq_limit, m_size); i++)
1109 : {
1110 >12583*10^8 : value_type *entry = &m_entries[i];
1111 >12583*10^8 : if (!is_empty (*entry))
1112 : {
1113 >48629*10^7 : n_elements--;
1114 >48629*10^7 : if (is_deleted (*entry))
1115 25945781317 : n_deleted--;
1116 >46030*10^7 : else if (hash != Descriptor::hash (*entry)
1117 >46176*10^7 : && Descriptor::equal (*entry, comparable))
1118 0 : hashtab_chk_error ();
1119 : }
1120 : }
1121 >12614*10^7 : if (hash_table_sanitize_eq_limit >= m_size)
1122 418476574 : gcc_checking_assert (!n_elements && !n_deleted);
1123 >12614*10^7 : }
1124 :
1125 : /* This function deletes an element with the given COMPARABLE value
1126 : from hash table starting with the given HASH. If there is no
1127 : matching element in the hash table, this function does nothing. */
1128 :
1129 : template<typename Descriptor, bool Lazy,
1130 : template<typename Type> class Allocator>
1131 : void
1132 279919696 : hash_table<Descriptor, Lazy, Allocator>
1133 : ::remove_elt_with_hash (const compare_type &comparable, hashval_t hash)
1134 : {
1135 279919696 : check_complete_insertion ();
1136 :
1137 279919696 : value_type *slot = find_slot_with_hash (comparable, hash, NO_INSERT);
1138 279919696 : if (slot == NULL)
1139 : return;
1140 :
1141 93388022 : Descriptor::remove (*slot);
1142 :
1143 93388022 : mark_deleted (*slot);
1144 93388022 : m_n_deleted++;
1145 : }
1146 :
1147 : /* This function scans over the entire hash table calling CALLBACK for
1148 : each live entry. If CALLBACK returns false, the iteration stops.
1149 : ARGUMENT is passed as CALLBACK's second argument. */
1150 :
1151 : template<typename Descriptor, bool Lazy,
1152 : template<typename Type> class Allocator>
1153 : template<typename Argument,
1154 : int (*Callback)
1155 : (typename hash_table<Descriptor, Lazy, Allocator>::value_type *slot,
1156 : Argument argument)>
1157 : void
1158 278375162 : hash_table<Descriptor, Lazy, Allocator>::traverse_noresize (Argument argument)
1159 : {
1160 : if (Lazy && m_entries == NULL)
1161 : return;
1162 :
1163 278375162 : check_complete_insertion ();
1164 :
1165 278375162 : value_type *slot = m_entries;
1166 278375162 : value_type *limit = slot + size ();
1167 :
1168 : do
1169 : {
1170 14417680078 : value_type &x = *slot;
1171 :
1172 14417680078 : if (!is_empty (x) && !is_deleted (x))
1173 4907871643 : if (! Callback (slot, argument))
1174 : break;
1175 : }
1176 14417451406 : while (++slot < limit);
1177 : }
1178 :
1179 : /* Like traverse_noresize, but does resize the table when it is too empty
1180 : to improve effectivity of subsequent calls. */
1181 :
1182 : template <typename Descriptor, bool Lazy,
1183 : template <typename Type> class Allocator>
1184 : template <typename Argument,
1185 : int (*Callback)
1186 : (typename hash_table<Descriptor, Lazy, Allocator>::value_type *slot,
1187 : Argument argument)>
1188 : void
1189 277499811 : hash_table<Descriptor, Lazy, Allocator>::traverse (Argument argument)
1190 : {
1191 277499811 : if (too_empty_p (elements ()) && (!Lazy || m_entries))
1192 1282827 : expand ();
1193 :
1194 277499811 : traverse_noresize <Argument, Callback> (argument);
1195 277499811 : }
1196 :
1197 : /* Slide down the iterator slots until an active entry is found. */
1198 :
1199 : template<typename Descriptor, bool Lazy,
1200 : template<typename Type> class Allocator>
1201 : void
1202 5706635806 : hash_table<Descriptor, Lazy, Allocator>::iterator::slide ()
1203 : {
1204 19529701205 : for ( ; m_slot < m_limit; ++m_slot )
1205 : {
1206 19226292223 : value_type &x = *m_slot;
1207 19226292223 : if (!is_empty (x) && !is_deleted (x))
1208 978580166 : return;
1209 : }
1210 303408982 : m_slot = NULL;
1211 303408982 : m_limit = NULL;
1212 : }
1213 :
1214 : /* Bump the iterator. */
1215 :
1216 : template<typename Descriptor, bool Lazy,
1217 : template<typename Type> class Allocator>
1218 : inline typename hash_table<Descriptor, Lazy, Allocator>::iterator &
1219 5401565073 : hash_table<Descriptor, Lazy, Allocator>::iterator::operator ++ ()
1220 : {
1221 5401565073 : ++m_slot;
1222 3069612693 : slide ();
1223 3609441331 : return *this;
1224 : }
1225 :
1226 :
1227 : /* Iterate through the elements of hash_table HTAB,
1228 : using hash_table <....>::iterator ITER,
1229 : storing each element in RESULT, which is of type TYPE. */
1230 :
1231 : #define FOR_EACH_HASH_TABLE_ELEMENT(HTAB, RESULT, TYPE, ITER) \
1232 : for ((ITER) = (HTAB).begin (); \
1233 : (ITER) != (HTAB).end () ? (RESULT = *(ITER) , true) : false; \
1234 : ++(ITER))
1235 :
1236 : /* ggc walking routines. */
1237 :
1238 : template<typename E>
1239 : inline void
1240 81139354 : gt_ggc_mx (hash_table<E> *h)
1241 : {
1242 : typedef hash_table<E> table;
1243 :
1244 81139354 : if (!ggc_test_and_set_mark (h->m_entries))
1245 0 : return;
1246 :
1247 20332261902 : for (size_t i = 0; i < h->m_size; i++)
1248 : {
1249 32660944529 : if (table::is_empty (h->m_entries[i])
1250 20251110882 : || table::is_deleted (h->m_entries[i]))
1251 13741060871 : continue;
1252 :
1253 : /* Use ggc_maxbe_mx so we don't mark right away for cache tables; we'll
1254 : mark in gt_cleare_cache if appropriate. */
1255 3845642646 : E::ggc_maybe_mx (h->m_entries[i]);
1256 : }
1257 : }
1258 :
1259 : template<typename D>
1260 : inline void
1261 19942 : hashtab_entry_note_pointers (void *obj, void *h, gt_pointer_operator op,
1262 : void *cookie)
1263 : {
1264 19942 : hash_table<D> *map = static_cast<hash_table<D> *> (h);
1265 19942 : gcc_checking_assert (map->m_entries == obj);
1266 7781456 : for (size_t i = 0; i < map->m_size; i++)
1267 : {
1268 : typedef hash_table<D> table;
1269 13062290 : if (table::is_empty (map->m_entries[i])
1270 7761136 : || table::is_deleted (map->m_entries[i]))
1271 5666529 : continue;
1272 :
1273 2094945 : D::pch_nx (map->m_entries[i], op, cookie);
1274 : }
1275 19942 : }
1276 :
1277 : template<typename D>
1278 : void
1279 19942 : gt_pch_nx (hash_table<D> *h)
1280 : {
1281 19942 : h->check_complete_insertion ();
1282 19942 : bool success
1283 19942 : = gt_pch_note_object (h->m_entries, h, hashtab_entry_note_pointers<D>);
1284 19942 : gcc_checking_assert (success);
1285 7781456 : for (size_t i = 0; i < h->m_size; i++)
1286 : {
1287 13062290 : if (hash_table<D>::is_empty (h->m_entries[i])
1288 7761136 : || hash_table<D>::is_deleted (h->m_entries[i]))
1289 5666529 : continue;
1290 :
1291 2094945 : D::pch_nx (h->m_entries[i]);
1292 : }
1293 19942 : }
1294 :
1295 : template<typename D>
1296 : inline void
1297 10077 : gt_pch_nx (hash_table<D> *h, gt_pointer_operator op, void *cookie)
1298 : {
1299 10077 : op (&h->m_entries, NULL, cookie);
1300 10077 : }
1301 :
1302 : template<typename H>
1303 : inline void
1304 14063001 : gt_cleare_cache (hash_table<H> *h)
1305 : {
1306 : typedef hash_table<H> table;
1307 14063001 : if (!h)
1308 : return;
1309 :
1310 4408743017 : for (typename table::iterator iter = h->begin (); iter != h->end (); ++iter)
1311 2492994979 : if (!table::is_empty (*iter) && !table::is_deleted (*iter))
1312 : {
1313 3087892400 : int res = H::keep_cache_entry (*iter);
1314 1898097558 : if (res == 0)
1315 141877429 : h->clear_slot (&*iter);
1316 : else if (res != -1)
1317 1799260109 : H::ggc_mx (*iter);
1318 : }
1319 : }
1320 :
1321 : #endif /* TYPED_HASHTAB_H */
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