Add the proper restrictions on the left-hand argument of a built-in
assignment operator candidate (C++ [over.match.oper]p4).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62128 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index fc619c6..dde9b76 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -458,7 +458,8 @@
                              OverloadCandidateSet& CandidateSet);
   void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 
                            Expr **Args, unsigned NumArgs,
-                           OverloadCandidateSet& CandidateSet);
+                           OverloadCandidateSet& CandidateSet,
+                           bool IsAssignmentOperator = false);
   void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 
                                     Expr **Args, unsigned NumArgs, 
                                     OverloadCandidateSet& CandidateSet);