001/*
002 * Copyright (c) 2013, 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;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.compiler.common.type.*;
028import com.oracle.graal.graph.*;
029import com.oracle.graal.hotspot.*;
030import com.oracle.graal.lir.StandardOp.SaveRegistersOp;
031import com.oracle.graal.nodeinfo.*;
032import com.oracle.graal.nodes.*;
033import com.oracle.graal.nodes.memory.*;
034import com.oracle.graal.nodes.spi.*;
035
036/**
037 * Saves all allocatable registers.
038 */
039@NodeInfo(allowedUsageTypes = {InputType.Memory})
040public final class SaveAllRegistersNode extends FixedWithNextNode implements LIRLowerable, MemoryCheckpoint.Single {
041
042    public static final NodeClass<SaveAllRegistersNode> TYPE = NodeClass.create(SaveAllRegistersNode.class);
043    protected SaveRegistersOp saveRegistersOp;
044
045    public SaveAllRegistersNode() {
046        super(TYPE, StampFactory.forKind(Kind.Long));
047    }
048
049    @Override
050    public void generate(NodeLIRBuilderTool gen) {
051        saveRegistersOp = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitSaveAllRegisters();
052    }
053
054    /**
055     * @return the map from registers to the stack locations in they are saved
056     */
057    public SaveRegistersOp getSaveRegistersOp() {
058        assert saveRegistersOp != null : "saved registers op has not yet been created";
059        return saveRegistersOp;
060    }
061
062    /**
063     * @return a token that couples this node to an {@link UncommonTrapCallNode} so that the latter
064     *         has access to the {@linkplain SaveRegistersOp#getMap register save map}
065     */
066    @NodeIntrinsic
067    public static native long saveAllRegisters();
068
069    public LocationIdentity getLocationIdentity() {
070        return LocationIdentity.any();
071    }
072}