001/*
002 * Copyright (c) 2014, 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.hotspot.word;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.compiler.common.type.*;
028import com.oracle.graal.graph.*;
029import com.oracle.graal.hotspot.word.HotSpotOperation.HotspotOpcode;
030import com.oracle.graal.nodeinfo.*;
031import com.oracle.graal.nodes.*;
032import com.oracle.graal.nodes.calc.*;
033import com.oracle.graal.nodes.spi.*;
034
035/**
036 * Cast between Word and metaspace pointers exposed by the {@link HotspotOpcode#FROM_POINTER} and
037 * {@link HotspotOpcode#TO_KLASS_POINTER} operations.
038 */
039@NodeInfo
040public final class PointerCastNode extends FloatingNode implements LIRLowerable {
041
042    public static final NodeClass<PointerCastNode> TYPE = NodeClass.create(PointerCastNode.class);
043    @Input ValueNode input;
044
045    public PointerCastNode(Stamp stamp, ValueNode input) {
046        super(TYPE, stamp);
047        this.input = input;
048    }
049
050    public ValueNode getInput() {
051        return input;
052    }
053
054    @Override
055    public void generate(NodeLIRBuilderTool generator) {
056        Value value = generator.operand(input);
057        assert value.getLIRKind().equals(generator.getLIRGeneratorTool().getLIRKind(stamp())) : "PointerCastNode shouldn't change the LIRKind";
058
059        generator.setResult(this, value);
060    }
061}