From 0bdcb8a239baf721a0763f1f01ed3a41cb5b6061 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Thu, 29 Jul 2010 16:05:45 +0000
Subject: [PATCH] When taking the address of a value of Objective-C object type
 (e.g., one because we're referencing a variable of type NSString &), the
 resulting type is an ObjCObjectPointerType.

llvm-svn: 109753
---
 clang/lib/Sema/SemaExpr.cpp         | 2 ++
 clang/test/SemaObjCXX/references.mm | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index b2f1a356dfb3..6f971b116d61 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -6313,6 +6313,8 @@ QualType Sema::CheckAddressOfOperand(Expr *op, SourceLocation OpLoc) {
   }
 
   // If the operand has type "type", the result has type "pointer to type".
+  if (op->getType()->isObjCObjectType())
+    return Context.getObjCObjectPointerType(op->getType());
   return Context.getPointerType(op->getType());
 }
 
diff --git a/clang/test/SemaObjCXX/references.mm b/clang/test/SemaObjCXX/references.mm
index 70ce8278e8f0..9eceeaf19f5d 100644
--- a/clang/test/SemaObjCXX/references.mm
+++ b/clang/test/SemaObjCXX/references.mm
@@ -24,3 +24,10 @@ int f2(A *a) {
   return f0(a.p1);	// expected-error {{property 'p1' not found on object of type 'A *'}}
 }
 
+// PR7740
+@class NSString;
+
+void f3(id);
+void f4(NSString &tmpstr) {
+  f3(&tmpstr);
+}