1 /* 2 * Copyright (c) 2011, 2016, 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.memory; 24 25 import org.graalvm.compiler.core.common.LocationIdentity; 26 import org.graalvm.compiler.graph.Node; 27 import org.graalvm.compiler.nodes.FixedNode; 28 import org.graalvm.compiler.nodes.FixedNodeInterface; 29 30 /** 31 * This interface marks subclasses of {@link FixedNode} that kill a set of memory locations 32 * represented by location identities (i.e. change a value at one or more locations that belong to 33 * these location identities). 34 */ 35 public interface MemoryCheckpoint extends MemoryNode, FixedNodeInterface { 36 37 interface Single extends MemoryCheckpoint { 38 39 /** 40 * This method is used to determine which memory location is killed by this node. Returning 41 * the special value {@link LocationIdentity#any()} will kill all memory locations. 42 * 43 * @return the identity of the location killed by this node. 44 */ 45 LocationIdentity getLocationIdentity(); 46 47 } 48 49 interface Multi extends MemoryCheckpoint { 50 51 /** 52 * This method is used to determine which set of memory locations is killed by this node. 53 * Returning the special value {@link LocationIdentity#any()} will kill all memory 54 * locations. 55 * 56 * @return the identities of all locations killed by this node. 57 */ 58 LocationIdentity[] getLocationIdentities(); 59 60 } 61 62 class TypeAssertion { 63 64 public static boolean correctType(Node node) { 65 return !(node instanceof MemoryCheckpoint) || (node instanceof MemoryCheckpoint.Single ^ node instanceof MemoryCheckpoint.Multi); 66 } 67 } 68 }