PR target/81369
[official-gcc.git] / gcc / tree-hash-traits.h
blob01fda3c25ee390a38168b0dbffd27b16c032ed53
1 /* Traits for hashing trees.
2 Copyright (C) 2014-2017 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef tree_hash_traits_h
21 #define tree_hash_traits_h
23 /* Hash for trees based on operand_equal_p. */
24 struct tree_operand_hash : ggc_ptr_hash <tree_node>
26 static inline hashval_t hash (const value_type &);
27 static inline bool equal (const value_type &,
28 const compare_type &);
31 inline hashval_t
32 tree_operand_hash::hash (const value_type &t)
34 return iterative_hash_expr (t, 0);
37 inline bool
38 tree_operand_hash::equal (const value_type &t1,
39 const compare_type &t2)
41 return operand_equal_p (t1, t2, 0);
44 /* Hasher for tree decls. Pointer equality is enough here, but the DECL_UID
45 is a better hash than the pointer value and gives a predictable traversal
46 order. */
47 struct tree_decl_hash : ggc_ptr_hash <tree_node>
49 static inline hashval_t hash (tree);
52 inline hashval_t
53 tree_decl_hash::hash (tree t)
55 return DECL_UID (t);
58 /* Hash for SSA_NAMEs in the same function. Pointer equality is enough
59 here, but the SSA_NAME_VERSION is a better hash than the pointer
60 value and gives a predictable traversal order. */
61 struct tree_ssa_name_hash : ggc_ptr_hash <tree_node>
63 static inline hashval_t hash (tree);
66 inline hashval_t
67 tree_ssa_name_hash::hash (tree t)
69 return SSA_NAME_VERSION (t);
72 /* Hasher for general trees, based on their TREE_HASH. */
73 struct tree_hash : ggc_ptr_hash <tree_node>
75 static hashval_t hash (tree);
78 inline hashval_t
79 tree_hash::hash (tree t)
81 return TREE_HASH (t);
84 #endif