001/*
002 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.compiler.match;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.compiler.gen.*;
028
029/**
030 * A wrapper value for the lazy evaluation of a complex match. There's an intermediate class for the
031 * closure because Value is serializable which is a hassle for the little inner classes which
032 * usually occur here.
033 */
034public class ComplexMatchValue extends AbstractValue {
035
036    /**
037     * This is the Value of a node which was matched as part of a complex match. The value isn't
038     * actually useable but this marks it as having been evaluated.
039     */
040    public static final Value INTERIOR_MATCH = new AbstractValue(LIRKind.Illegal) {
041
042        @Override
043        public String toString() {
044            return "INTERIOR_MATCH";
045        }
046
047        @Override
048        public boolean equals(Object other) {
049            // This class is a singleton
050            return other != null && getClass() == other.getClass();
051        }
052    };
053
054    final ComplexMatchResult result;
055
056    public ComplexMatchValue(ComplexMatchResult result) {
057        super(LIRKind.Illegal);
058        this.result = result;
059    }
060
061    public Value evaluate(NodeLIRBuilder builder) {
062        return result.evaluate(builder);
063    }
064}