1 /* 2 * Copyright (c) 2012, 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 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 */ 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