1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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13  * accompanied this code).
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23 
24 
25 package org.graalvm.compiler.nodes;
26 
27 import org.graalvm.compiler.core.common.type.StampFactory;
28 import org.graalvm.compiler.graph.Node;
29 import org.graalvm.compiler.graph.NodeClass;
30 import org.graalvm.compiler.graph.spi.Canonicalizable;
31 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
32 import org.graalvm.compiler.nodeinfo.InputType;
33 import org.graalvm.compiler.nodeinfo.NodeInfo;
34 import org.graalvm.compiler.nodes.extended.GuardingNode;
35 import org.graalvm.compiler.nodes.spi.LIRLowerable;
36 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
37 import org.graalvm.compiler.nodes.spi.Proxy;
38 
39 @NodeInfo(allowedUsageTypes = {InputType.Guard}, nameTemplate = "Proxy({i#value})")
40 public final class GuardProxyNode extends ProxyNode implements GuardingNode, Proxy, LIRLowerable, Canonicalizable {
41 
42     public static final NodeClass<GuardProxyNode> TYPE = NodeClass.create(GuardProxyNode.class);
43     @OptionalInput(InputType.Guard) GuardingNode value;
44 
GuardProxyNode(GuardingNode value, LoopExitNode proxyPoint)45     public GuardProxyNode(GuardingNode value, LoopExitNode proxyPoint) {
46         super(TYPE, StampFactory.forVoid(), proxyPoint);
47         this.value = value;
48     }
49 
50     @Override
generate(NodeLIRBuilderTool generator)51     public void generate(NodeLIRBuilderTool generator) {
52     }
53 
setValue(GuardingNode newValue)54     public void setValue(GuardingNode newValue) {
55         this.updateUsages(value.asNode(), newValue.asNode());
56         this.value = newValue;
57     }
58 
59     @Override
value()60     public ValueNode value() {
61         return (value == null ? null : value.asNode());
62     }
63 
64     @Override
getOriginalNode()65     public Node getOriginalNode() {
66         return (value == null ? null : value.asNode());
67     }
68 
69     @Override
canonical(CanonicalizerTool tool)70     public Node canonical(CanonicalizerTool tool) {
71         if (value == null) {
72             return null;
73         }
74         return this;
75     }
76 }
77