001/*
002 * Copyright (c) 2013, 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.nodes;
024
025import jdk.internal.jvmci.code.*;
026
027import com.oracle.graal.graph.*;
028import com.oracle.graal.graph.spi.*;
029import com.oracle.graal.nodeinfo.*;
030import com.oracle.graal.nodes.spi.*;
031
032/**
033 * Nodes of this type are inserted into the graph to denote points of interest to debugging.
034 */
035@NodeInfo
036public final class FullInfopointNode extends InfopointNode implements LIRLowerable, NodeWithState, Simplifiable {
037    public static final NodeClass<FullInfopointNode> TYPE = NodeClass.create(FullInfopointNode.class);
038    @Input(InputType.State) FrameState state;
039    @OptionalInput ValueNode escapedReturnValue;
040
041    public FullInfopointNode(InfopointReason reason, FrameState state, ValueNode escapedReturnValue) {
042        super(TYPE, reason);
043        this.state = state;
044        this.escapedReturnValue = escapedReturnValue;
045    }
046
047    private void setEscapedReturnValue(ValueNode x) {
048        updateUsages(escapedReturnValue, x);
049        escapedReturnValue = x;
050    }
051
052    @Override
053    public void simplify(SimplifierTool tool) {
054        if (escapedReturnValue != null && state != null && state.outerFrameState() != null) {
055            ValueNode returnValue = escapedReturnValue;
056            setEscapedReturnValue(null);
057            tool.removeIfUnused(returnValue);
058        }
059    }
060
061    @Override
062    public void generate(NodeLIRBuilderTool generator) {
063        generator.visitFullInfopointNode(this);
064    }
065
066    public FrameState getState() {
067        return state;
068    }
069
070    @Override
071    public boolean verify() {
072        return state != null && super.verify();
073    }
074
075}