001/*
002 * Copyright (c) 2013, 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.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.spi.*;
034import com.oracle.graal.word.*;
035
036/**
037 * Emits code to enter a low-level stack frame specifically to call out to the C++ method
038 * {@link HotSpotBackend#UNPACK_FRAMES Deoptimization::unpack_frames}.
039 */
040@NodeInfo
041public final class EnterUnpackFramesStackFrameNode extends FixedWithNextNode implements LIRLowerable {
042    public static final NodeClass<EnterUnpackFramesStackFrameNode> TYPE = NodeClass.create(EnterUnpackFramesStackFrameNode.class);
043
044    @Input ValueNode framePc;
045    @Input ValueNode senderSp;
046    @Input ValueNode senderFp;
047    @Input SaveAllRegistersNode registerSaver;
048
049    public EnterUnpackFramesStackFrameNode(ValueNode framePc, ValueNode senderSp, ValueNode senderFp, ValueNode registerSaver) {
050        super(TYPE, StampFactory.forVoid());
051        this.framePc = framePc;
052        this.senderSp = senderSp;
053        this.senderFp = senderFp;
054        this.registerSaver = (SaveAllRegistersNode) registerSaver;
055    }
056
057    private SaveRegistersOp getSaveRegistersOp() {
058        return registerSaver.getSaveRegistersOp();
059    }
060
061    @Override
062    public void generate(NodeLIRBuilderTool gen) {
063        Value operandValue = gen.operand(framePc);
064        Value senderSpValue = gen.operand(senderSp);
065        Value senderFpValue = gen.operand(senderFp);
066        ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitEnterUnpackFramesStackFrame(operandValue, senderSpValue, senderFpValue, getSaveRegistersOp());
067    }
068
069    @NodeIntrinsic
070    public static native void enterUnpackFramesStackFrame(Word framePc, Word senderSp, Word senderFp, long registerSaver);
071}