Fix rdar://6222856: the receiver of a message expr is an
arbitrary expr, not just a assign expr.  The grammar comment
was right, the code was just wrong.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@56353 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseObjc.cpp b/lib/Parse/ParseObjc.cpp
index a2f4eb2..e957db4 100644
--- a/lib/Parse/ParseObjc.cpp
+++ b/lib/Parse/ParseObjc.cpp
@@ -1435,7 +1435,7 @@
     return ParseObjCMessageExpressionBody(LBracLoc, ReceiverName, 0);
   }
 
-  ExprResult Res = ParseAssignmentExpression();
+  ExprResult Res = ParseExpression();
   if (Res.isInvalid) {
     SkipUntil(tok::r_square);
     return Res;