src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/ir/AccessNode.java

*** 26,35 ****
--- 26,37 ----
  package jdk.nashorn.internal.ir;
  
  import jdk.nashorn.internal.codegen.types.Type;
  import jdk.nashorn.internal.ir.annotations.Immutable;
  import jdk.nashorn.internal.ir.visitor.NodeVisitor;
+ import jdk.nashorn.internal.parser.Token;
+ import jdk.nashorn.internal.parser.TokenType;
  
  /**
   * IR representation of a property access (period operator.)
   */
  @Immutable
*** 99,108 ****
--- 101,118 ----
       */
      public String getProperty() {
          return property;
      }
  
+     /**
+      * Return true if this node represents an index operation normally represented as {@link IndexNode}.
+      * @return true if an index access.
+      */
+     public boolean isIndex() {
+         return Token.descType(getToken()) == TokenType.LBRACKET;
+     }
+ 
      private AccessNode setBase(final Expression base) {
          if (this.base == base) {
              return this;
          }
          return new AccessNode(this, base, property, isFunction(), type, programPoint);