1 /*
   2  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.core.match;
  26 
  27 import org.graalvm.compiler.core.common.LIRKind;
  28 import org.graalvm.compiler.core.gen.NodeLIRBuilder;
  29 
  30 import jdk.vm.ci.meta.Value;
  31 
  32 /**
  33  * A wrapper value for the lazy evaluation of a complex match. There's an intermediate class for the
  34  * closure because Value is serializable which is a hassle for the little inner classes which
  35  * usually occur here.
  36  */
  37 public class ComplexMatchValue extends Value {
  38 
  39     /**
  40      * This is the Value of a node which was matched as part of a complex match. The value isn't
  41      * actually useable but this marks it as having been evaluated.
  42      */
  43     public static final Value INTERIOR_MATCH = new Value(LIRKind.Illegal) {
  44 
  45         @Override
  46         public String toString() {
  47             return "INTERIOR_MATCH";
  48         }
  49 
  50         @Override
  51         public boolean equals(Object other) {
  52             // This class is a singleton
  53             return other != null && getClass() == other.getClass();
  54         }
  55     };
  56 
  57     final ComplexMatchResult result;
  58 
  59     public ComplexMatchValue(ComplexMatchResult result) {
  60         super(LIRKind.Illegal);
  61         this.result = result;
  62     }
  63 
  64     public Value evaluate(NodeLIRBuilder builder) {
  65         return result.evaluate(builder);
  66     }
  67 }