1 /* 2 * Copyright (c) 2011, 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.spi; 24 25 /** 26 * This interface allows a node to convey information about what its effect would be if some of its 27 * inputs were virtualized. The {@link #virtualize(VirtualizerTool)} method will only be called for 28 * nodes that have some interaction with virtualized nodes. However, the virtualized nodes might 29 * have been re-materialized in the meantime. 30 */ 31 public interface Virtualizable { 32 33 /** 34 * A node class can implement this method to convey information about what its effect would be 35 * if some of its inputs were virtualized. All modifications must be made through the supplied 36 * tool, and not directly on the node, because by the time this method is called the 37 * virtualized/non-virtualized state is still speculative and might not hold because of loops, 38 * etc. 39 * 40 * @param tool the tool used to describe the effects of this node 41 */ 42 void virtualize(VirtualizerTool tool); 43 }