+2015-06-25 Richard Sandiford <richard.sandiford@arm.com>
+
+ * hash-table.h: Include hash-traits.h.
+ (typed_free_remove, typed_noop_remove, pointer_hash, ggc_hasher)
+ (ggc_cache_hasher): Move to...
+ * hash-traits.h: ...this new file.
+
2015-06-25 Andrew MacLeod <amacleod@redhat.com>
* tree-core.h (struct tree_optimization_option): Make opts a pointer to
We compose this into a few steps.
1. Decide on a removal policy for values stored in the table.
- This header provides class templates for the two most common
+ hash-traits.h provides class templates for the two most common
policies.
* typed_free_remove implements the static 'remove' member function
#include "hashtab.h"
#include "inchash.h"
#include "mem-stats-traits.h"
+#include "hash-traits.h"
#include "hash-map-traits.h"
template<typename, typename, typename> class hash_map;
}
-/* Helpful type for removing with free. */
-
-template <typename Type>
-struct typed_free_remove
-{
- static inline void remove (Type *p);
-};
-
-
-/* Remove with free. */
-
-template <typename Type>
-inline void
-typed_free_remove <Type>::remove (Type *p)
-{
- free (p);
-}
-
-
-/* Helpful type for a no-op remove. */
-
-template <typename Type>
-struct typed_noop_remove
-{
- static inline void remove (Type *p);
-};
-
-
-/* Remove doing nothing. */
-
-template <typename Type>
-inline void
-typed_noop_remove <Type>::remove (Type *p ATTRIBUTE_UNUSED)
-{
-}
-
-
-/* Pointer hash with a no-op remove method. */
-
-template <typename Type>
-struct pointer_hash : typed_noop_remove <Type>
-{
- typedef Type *value_type;
- typedef Type *compare_type;
-
- static inline hashval_t hash (const value_type &);
-
- static inline bool equal (const value_type &existing,
- const compare_type &candidate);
-};
-
-template <typename Type>
-inline hashval_t
-pointer_hash <Type>::hash (const value_type &candidate)
-{
- /* This is a really poor hash function, but it is what the current code uses,
- so I am reusing it to avoid an additional axis in testing. */
- return (hashval_t) ((intptr_t)candidate >> 3);
-}
-
-template <typename Type>
-inline bool
-pointer_hash <Type>::equal (const value_type &existing,
- const compare_type &candidate)
-{
- return existing == candidate;
-}
-
-/* Hasher for entry in gc memory. */
-
-template<typename T>
-struct ggc_hasher
-{
- typedef T value_type;
- typedef T compare_type;
-
- static void remove (T) {}
-
- static void
- ggc_mx (T p)
- {
- extern void gt_ggc_mx (T &);
- gt_ggc_mx (p);
- }
-
- static void
- pch_nx (T &p)
- {
- extern void gt_pch_nx (T &);
- gt_pch_nx (p);
- }
-
- static void
- pch_nx (T &p, gt_pointer_operator op, void *cookie)
- {
- op (&p, cookie);
- }
-};
-
-/* Hasher for cache entry in gc memory. */
-
-template<typename T>
-struct ggc_cache_hasher
-{
- typedef T value_type;
- typedef T compare_type;
-
- static void remove (T &) {}
-
- /* Entries are weakly held because this is for caches. */
-
- static void ggc_mx (T &) {}
-
- static void
- pch_nx (T &p)
- {
- extern void gt_pch_nx (T &);
- gt_pch_nx (p);
- }
-
- static void
- pch_nx (T &p, gt_pointer_operator op, void *cookie)
- {
- op (&p, cookie);
- }
-
- /* Clear out entries if they are about to be gc'd. */
-
- static void
- handle_cache_entry (T &e)
- {
- if (e != HTAB_EMPTY_ENTRY && e != HTAB_DELETED_ENTRY && !ggc_marked_p (e))
- e = static_cast<T> (HTAB_DELETED_ENTRY);
- }
-};
-
-
/* Table of primes and their inversion information. */
struct prime_ent
--- /dev/null
+/* Traits for hashable types.
+ Copyright (C) 2014-2015 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef hash_traits_h
+#define hash_traits_h
+
+/* Helpful type for removing with free. */
+
+template <typename Type>
+struct typed_free_remove
+{
+ static inline void remove (Type *p);
+};
+
+
+/* Remove with free. */
+
+template <typename Type>
+inline void
+typed_free_remove <Type>::remove (Type *p)
+{
+ free (p);
+}
+
+
+/* Helpful type for a no-op remove. */
+
+template <typename Type>
+struct typed_noop_remove
+{
+ static inline void remove (Type *p);
+};
+
+
+/* Remove doing nothing. */
+
+template <typename Type>
+inline void
+typed_noop_remove <Type>::remove (Type *p ATTRIBUTE_UNUSED)
+{
+}
+
+
+/* Pointer hash with a no-op remove method. */
+
+template <typename Type>
+struct pointer_hash : typed_noop_remove <Type>
+{
+ typedef Type *value_type;
+ typedef Type *compare_type;
+
+ static inline hashval_t hash (const value_type &);
+
+ static inline bool equal (const value_type &existing,
+ const compare_type &candidate);
+};
+
+template <typename Type>
+inline hashval_t
+pointer_hash <Type>::hash (const value_type &candidate)
+{
+ /* This is a really poor hash function, but it is what the current code uses,
+ so I am reusing it to avoid an additional axis in testing. */
+ return (hashval_t) ((intptr_t)candidate >> 3);
+}
+
+template <typename Type>
+inline bool
+pointer_hash <Type>::equal (const value_type &existing,
+ const compare_type &candidate)
+{
+ return existing == candidate;
+}
+
+/* Hasher for entry in gc memory. */
+
+template<typename T>
+struct ggc_hasher
+{
+ typedef T value_type;
+ typedef T compare_type;
+
+ static void remove (T) {}
+
+ static void
+ ggc_mx (T p)
+ {
+ extern void gt_ggc_mx (T &);
+ gt_ggc_mx (p);
+ }
+
+ static void
+ pch_nx (T &p)
+ {
+ extern void gt_pch_nx (T &);
+ gt_pch_nx (p);
+ }
+
+ static void
+ pch_nx (T &p, gt_pointer_operator op, void *cookie)
+ {
+ op (&p, cookie);
+ }
+};
+
+/* Hasher for cache entry in gc memory. */
+
+template<typename T>
+struct ggc_cache_hasher
+{
+ typedef T value_type;
+ typedef T compare_type;
+
+ static void remove (T &) {}
+
+ /* Entries are weakly held because this is for caches. */
+
+ static void ggc_mx (T &) {}
+
+ static void
+ pch_nx (T &p)
+ {
+ extern void gt_pch_nx (T &);
+ gt_pch_nx (p);
+ }
+
+ static void
+ pch_nx (T &p, gt_pointer_operator op, void *cookie)
+ {
+ op (&p, cookie);
+ }
+
+ /* Clear out entries if they are about to be gc'd. */
+
+ static void
+ handle_cache_entry (T &e)
+ {
+ if (e != HTAB_EMPTY_ENTRY && e != HTAB_DELETED_ENTRY && !ggc_marked_p (e))
+ e = static_cast<T> (HTAB_DELETED_ENTRY);
+ }
+};
+
+#endif
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