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

@@ -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());
 }
 

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);
+}