From 470e08e1d1ec4c3c0eae96fab98c1f4a1552c2a3 Mon Sep 17 00:00:00 2001
From: John McCall <rjmccall@apple.com>
Date: Wed, 23 Sep 2009 06:53:51 +0000
Subject: [PATCH] Make the type traits for a const pointer defer to those for a
 unqualified pointer, instead of providing independent values modelled on the
 default implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82620 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/PointerLikeTypeTraits.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/llvm/Support/PointerLikeTypeTraits.h b/include/llvm/Support/PointerLikeTypeTraits.h
index b0edd3bd09f..d64993f54d1 100644
--- a/include/llvm/Support/PointerLikeTypeTraits.h
+++ b/include/llvm/Support/PointerLikeTypeTraits.h
@@ -50,12 +50,16 @@ public:
 // Provide PointerLikeTypeTraits for const pointers.
 template<typename T>
 class PointerLikeTypeTraits<const T*> {
+  typedef PointerLikeTypeTraits<T*> NonConst;
+
 public:
-  static inline const void *getAsVoidPointer(const T* P) { return P; }
-  static inline const T *getFromVoidPointer(const void *P) {
-    return static_cast<const T*>(P);
+  static inline const void *getAsVoidPointer(const T* P) {
+    return NonConst::getAsVoidPointer(const_cast<T*>(P));
   }
-  enum { NumLowBitsAvailable = 2 };
+  static inline const T *getFromVoidPointer(const void *P) {
+    return NonConst::getFromVoidPointer(const_cast<void*>(P));
+  }
+  enum { NumLowBitsAvailable = NonConst::NumLowBitsAvailable };
 };
 
 // Provide PointerLikeTypeTraits for uintptr_t.