1/* 2 * Copyright (c) 2012, 2014, 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 16 * 2 along with this work; if not, write to the Free Software Foundation, 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 21 * questions. 22 */ 23package org.graalvm.compiler.nodes; 24 25import org.graalvm.compiler.core.common.type.StampFactory; 26import org.graalvm.compiler.graph.Node; 27import org.graalvm.compiler.graph.NodeClass; 28import org.graalvm.compiler.graph.spi.Canonicalizable; 29import org.graalvm.compiler.graph.spi.CanonicalizerTool; 30import org.graalvm.compiler.nodeinfo.InputType; 31import org.graalvm.compiler.nodeinfo.NodeInfo; 32import org.graalvm.compiler.nodes.extended.GuardingNode; 33import org.graalvm.compiler.nodes.spi.LIRLowerable; 34import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 35import org.graalvm.compiler.nodes.spi.Proxy; 36 37@NodeInfo(allowedUsageTypes = {InputType.Guard}, nameTemplate = "Proxy({i#value})") 38public final class GuardProxyNode extends ProxyNode implements GuardingNode, Proxy, LIRLowerable, Canonicalizable { 39 40 public static final NodeClass<GuardProxyNode> TYPE = NodeClass.create(GuardProxyNode.class); 41 @OptionalInput(InputType.Guard) GuardingNode value; 42 43 public GuardProxyNode(GuardingNode value, LoopExitNode proxyPoint) { 44 super(TYPE, StampFactory.forVoid(), proxyPoint); 45 this.value = value; 46 } 47 48 @Override 49 public void generate(NodeLIRBuilderTool generator) { 50 } 51 52 public void setValue(GuardingNode newValue) { 53 this.updateUsages(value.asNode(), newValue.asNode()); 54 this.value = newValue; 55 } 56 57 @Override 58 public ValueNode value() { 59 return (value == null ? null : value.asNode()); 60 } 61 62 @Override 63 public Node getOriginalNode() { 64 return (value == null ? null : value.asNode()); 65 } 66 67 @Override 68 public Node canonical(CanonicalizerTool tool) { 69 if (value == null) { 70 return null; 71 } 72 return this; 73 } 74} 75