From 843adf8844d4ec43d13dd05f7269cabc7058c027 Mon Sep 17 00:00:00 2001
From: Richard Sandiford <richard.sandiford@arm.com>
Date: Thu, 25 Jun 2015 17:06:02 +0000
Subject: gcc/ 	* hash-traits.h (pointer_hash::mark_deleted,
 pointer_hash::mark_empty) 	(pointer_hash::is_deleted,
 pointer_hash::is_empty): New functions.

From-SVN: r224956
---
 gcc/ChangeLog     |  5 +++++
 gcc/hash-traits.h | 33 ++++++++++++++++++++++++++++++++-
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 32cecf1..a9220e6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2015-06-25  Richard Sandiford  <richard.sandiford@arm.com>
 
+	* hash-traits.h (pointer_hash::mark_deleted, pointer_hash::mark_empty)
+	(pointer_hash::is_deleted, pointer_hash::is_empty): New functions.
+
+2015-06-25  Richard Sandiford  <richard.sandiford@arm.com>
+
 	* hash-traits.h (ggc_hasher::remove): Take a reference parameter.
 	(ggc_hasher::ggc_mx): Likewise.
 	(ggc_cache_hasher): Inherit from ggc_hasher.  Remove definitions
diff --git a/gcc/hash-traits.h b/gcc/hash-traits.h
index 1d1a220..65ed32c 100644
--- a/gcc/hash-traits.h
+++ b/gcc/hash-traits.h
@@ -66,9 +66,12 @@ struct pointer_hash : typed_noop_remove <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);
+  static inline void mark_deleted (Type *&);
+  static inline void mark_empty (Type *&);
+  static inline bool is_deleted (Type *);
+  static inline bool is_empty (Type *);
 };
 
 template <typename Type>
@@ -88,6 +91,34 @@ pointer_hash <Type>::equal (const value_type &existing,
   return existing == candidate;
 }
 
+template <typename Type>
+inline void
+pointer_hash <Type>::mark_deleted (Type *&e)
+{
+  e = reinterpret_cast<Type *> (1);
+}
+
+template <typename Type>
+inline void
+pointer_hash <Type>::mark_empty (Type *&e)
+{
+  e = NULL;
+}
+
+template <typename Type>
+inline bool
+pointer_hash <Type>::is_deleted (Type *e)
+{
+  return e == reinterpret_cast<Type *> (1);
+}
+
+template <typename Type>
+inline bool
+pointer_hash <Type>::is_empty (Type *e)
+{
+  return e == NULL;
+}
+
 /* Hasher for entry in gc memory.  */
 
 template<typename T>
-- 
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