1 files changed, 42 insertions, 0 deletions
diff --git a/gcc/tree-hash-traits.h b/gcc/tree-hash-traits.h
new file mode 100644
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--- /dev/null
+++ b/gcc/tree-hash-traits.h
@@ -0,0 +1,42 @@
+/* Traits for hashing trees.
+   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 tree_hash_traits_h
+#define tree_hash_traits_h
+
+/* Hash for trees based on operand_equal_p.  */
+struct tree_operand_hash : ggc_ptr_hash <tree_node>
+{
+  static inline hashval_t hash (const_tree);
+  static inline bool equal_keys (const_tree, const_tree);
+};
+
+inline hashval_t
+tree_operand_hash::hash (const_tree t)
+{
+  return iterative_hash_expr (t, 0);
+}
+
+inline bool
+tree_operand_hash::equal_keys (const_tree t1, const_tree t2)
+{
+  return operand_equal_p (t1, t2, 0);
+}
+
+#endif