001/*
002 * Copyright (c) 2014, 2015, 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.hotspot.nodes.type;
024
025import jdk.internal.jvmci.common.*;
026import jdk.internal.jvmci.meta.*;
027
028import com.oracle.graal.compiler.common.spi.*;
029import com.oracle.graal.compiler.common.type.*;
030
031public abstract class MetaspacePointerStamp extends AbstractPointerStamp {
032
033    protected MetaspacePointerStamp(boolean nonNull, boolean alwaysNull) {
034        super(nonNull, alwaysNull);
035    }
036
037    @Override
038    public LIRKind getLIRKind(LIRKindTool tool) {
039        return tool.getWordKind();
040    }
041
042    @Override
043    public Stamp empty() {
044        // there is no empty pointer stamp
045        return this;
046    }
047
048    @Override
049    public boolean hasValues() {
050        return true;
051    }
052
053    @Override
054    public ResolvedJavaType javaType(MetaAccessProvider metaAccess) {
055        throw JVMCIError.shouldNotReachHere("metaspace pointer has no Java type");
056    }
057
058    protected void appendString(StringBuilder str) {
059        str.append(nonNull() ? "!" : "").append(alwaysNull() ? " NULL" : "");
060    }
061
062}