Apparently empty names are allowed here.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157117 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 3e1899c..9571a26 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -1504,15 +1504,16 @@
   Decl *Member;
   if (isInstField) {
     CXXScopeSpec &SS = D.getCXXScopeSpec();
-    IdentifierInfo *II = Name.getAsIdentifierInfo();
 
     // Data members must have identifiers for names.
-    if (!II) {
+    if (!Name.isIdentifier()) {
       Diag(Loc, diag::err_bad_variable_name)
         << Name;
       return 0;
     }
 
+    IdentifierInfo *II = Name.getAsIdentifierInfo();
+
     // Member field could not be with "template" keyword.
     // So TemplateParameterLists should be empty in this case.
     if (TemplateParameterLists.size()) {