From 17e37c7959d60d8bfcbc8cb5630d3101ae583be5 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Wed, 1 Jun 2011 15:12:24 +0000
Subject: [PATCH] Implement comparisons between nullptr and Objective-C object
 pointers. Fixes PR10052.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132397 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaExpr.cpp      |  4 ++--
 test/SemaObjCXX/nullptr.mm | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 test/SemaObjCXX/nullptr.mm

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index e75af910bd..9afd5f8ccd 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -7536,7 +7536,7 @@ QualType Sema::CheckCompareOperands(ExprResult &lex, ExprResult &rex, SourceLoca
     // Comparison of pointers with null pointer constants and equality
     // comparisons of member pointers to null pointer constants.
     if (RHSIsNull &&
-        ((lType->isPointerType() || lType->isNullPtrType()) ||
+        ((lType->isAnyPointerType() || lType->isNullPtrType()) ||
          (!isRelational && lType->isMemberPointerType()))) {
       rex = ImpCastExprToType(rex.take(), lType, 
                         lType->isMemberPointerType()
@@ -7545,7 +7545,7 @@ QualType Sema::CheckCompareOperands(ExprResult &lex, ExprResult &rex, SourceLoca
       return ResultTy;
     }
     if (LHSIsNull &&
-        ((rType->isPointerType() || rType->isNullPtrType()) ||
+        ((rType->isAnyPointerType() || rType->isNullPtrType()) ||
          (!isRelational && rType->isMemberPointerType()))) {
       lex = ImpCastExprToType(lex.take(), rType, 
                         rType->isMemberPointerType()
diff --git a/test/SemaObjCXX/nullptr.mm b/test/SemaObjCXX/nullptr.mm
new file mode 100644
index 0000000000..4cd5669ef5
--- /dev/null
+++ b/test/SemaObjCXX/nullptr.mm
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify %s
+
+@interface A
+@end
+
+void comparisons(A *a) {
+  (void)(a == nullptr);
+  (void)(nullptr == a);
+}
+
+void assignment(A *a) {
+  a = nullptr;
+}