1 /*
2  * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
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22  */
23 
24 
25 package org.graalvm.compiler.nodes;
26 
27 import static org.graalvm.compiler.nodeinfo.InputType.Association;
28 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
29 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
30 
31 import org.graalvm.compiler.graph.NodeClass;
32 import org.graalvm.compiler.nodeinfo.NodeInfo;
33 import org.graalvm.compiler.nodes.calc.FloatingNode;
34 import org.graalvm.compiler.nodes.extended.GuardingNode;
35 import org.graalvm.compiler.nodes.spi.ValueProxy;
36 
37 /**
38  * Proxy node that is used in OSR. This node drops the stamp information from the value, since the
39  * types we see during OSR may be too precise (if a branch was not parsed for example).
40  */
41 @NodeInfo(nameTemplate = "EntryProxy({i#value})", cycles = CYCLES_0, size = SIZE_0)
42 public final class EntryProxyNode extends FloatingNode implements ValueProxy {
43 
44     public static final NodeClass<EntryProxyNode> TYPE = NodeClass.create(EntryProxyNode.class);
45     @Input(Association) EntryMarkerNode proxyPoint;
46     @Input ValueNode value;
47 
EntryProxyNode(ValueNode value, EntryMarkerNode proxyPoint)48     public EntryProxyNode(ValueNode value, EntryMarkerNode proxyPoint) {
49         super(TYPE, value.stamp(NodeView.DEFAULT).unrestricted());
50         this.value = value;
51         this.proxyPoint = proxyPoint;
52     }
53 
value()54     public ValueNode value() {
55         return value;
56     }
57 
58     @Override
getOriginalNode()59     public ValueNode getOriginalNode() {
60         return value();
61     }
62 
63     @Override
getGuard()64     public GuardingNode getGuard() {
65         return proxyPoint;
66     }
67 }
68