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tree-hash-traits.h (tree_decl_hash): New class. 

gcc/
	* tree-hash-traits.h (tree_decl_hash): New class.
	* tree-ssa-strlen.c: Include tree-hash-traits.h.
	(stridxlist_hash_traits): Use tree_decl_hash.

From-SVN: r224968
This commit is contained in:
Richard Sandiford 2015-06-25 17:15:54 +00:00 committed by Richard Sandiford
parent d6a818c59e
commit 910ee068df
3 changed files with 22 additions and 14 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2015-06-25 Richard Sandiford <richard.sandiford@arm.com>
* tree-hash-traits.h (tree_decl_hash): New class.
* tree-ssa-strlen.c: Include tree-hash-traits.h.
(stridxlist_hash_traits): Use tree_decl_hash.
2015-06-25 Richard Sandiford <richard.sandiford@arm.com>
* tree-hash-traits.h: New file.

14
gcc/tree-hash-traits.h
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@ -39,4 +39,18 @@ tree_operand_hash::equal_keys (const_tree t1, const_tree t2)
return operand_equal_p (t1, t2, 0);
}
/* Hasher for tree decls. Pointer equality is enough here, but the DECL_UID
is a better hash than the pointer value and gives a predictable traversal
order. */
struct tree_decl_hash : ggc_ptr_hash <tree_node>
{
static inline hashval_t hash (tree);
};
inline hashval_t
tree_decl_hash::hash (tree t)
{
return DECL_UID (t);
}
#endif

16
gcc/tree-ssa-strlen.c
View File

@ -71,6 +71,7 @@ along with GCC; see the file COPYING3. If not see
#include "ipa-ref.h"
#include "cgraph.h"
#include "ipa-chkp.h"
#include "tree-hash-traits.h"
/* A vector indexed by SSA_NAME_VERSION. 0 means unknown, positive value
is an index into strinfo vector, negative value stands for
@ -153,20 +154,7 @@ struct decl_stridxlist_map
struct stridxlist list;
};
/* stridxlist hashtable helpers. */
struct stridxlist_hash_traits : default_hashmap_traits
{
static inline hashval_t hash (tree);
};
/* Hash a from tree in a decl_stridxlist_map. */
inline hashval_t
stridxlist_hash_traits::hash (tree item)
{
return DECL_UID (item);
}
typedef simple_hashmap_traits <tree_decl_hash> stridxlist_hash_traits;
/* Hash table for mapping decls to a chained list of offset -> idx
mappings. */