1 /* 2 * Copyright (c) 2009, 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 */ 23 package org.graalvm.compiler.nodes; 24 25 import org.graalvm.compiler.core.common.type.StampFactory; 26 import org.graalvm.compiler.graph.NodeClass; 27 import org.graalvm.compiler.graph.NodeInputList; 28 import org.graalvm.compiler.nodeinfo.InputType; 29 import org.graalvm.compiler.nodeinfo.NodeInfo; 30 import org.graalvm.compiler.nodes.extended.GuardingNode; 31 32 /** 33 * Guard {@link PhiNode}s merge guard dependencies at control flow merges. 34 */ 35 @NodeInfo(nameTemplate = "GuardPhi({i#values})", allowedUsageTypes = {InputType.Guard}) 36 public final class GuardPhiNode extends PhiNode implements GuardingNode { 37 38 public static final NodeClass<GuardPhiNode> TYPE = NodeClass.create(GuardPhiNode.class); 39 @OptionalInput(InputType.Guard) NodeInputList<ValueNode> values; 40 41 public GuardPhiNode(AbstractMergeNode merge) { 42 super(TYPE, StampFactory.forVoid(), merge); 43 this.values = new NodeInputList<>(this); 44 } 45 46 public GuardPhiNode(AbstractMergeNode merge, ValueNode[] values) { 47 super(TYPE, StampFactory.forVoid(), merge); 48 this.values = new NodeInputList<>(this, values); 49 } 50 51 @Override 52 public NodeInputList<ValueNode> values() { 53 return values; 54 } 55 56 @Override 57 public boolean hasValidInput() { 58 return true; 59 } 60 }