src/jdk.compiler/share/classes/com/sun/tools/javac/tree/TreeInfo.java

@@ -165,10 +165,23 @@
              default:
                  return false;
          }
      }
  
+     public static boolean isSuperQualifier(JCTree tree) {
+         switch (tree.getTag()) {
+             case PARENS:
+                 return isThisQualifier(skipParens(tree));
+             case IDENT: {
+                 JCIdent id = (JCIdent)tree;
+                 return id.name == id.name.table.names._super;
+             }
+             default:
+                 return false;
+         }
+     }
+ 
      /** Is this tree an identifier, possibly qualified by 'this'?
       */
      public static boolean isIdentOrThisDotIdent(JCTree tree) {
          switch (tree.getTag()) {
              case PARENS: