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; 24 25 import org.graalvm.compiler.nodes.spi.NodeWithState; 26 27 /** 28 * A state split is a node that may have a frame state associated with it. 29 */ 30 public interface StateSplit extends NodeWithState { 31 32 /** 33 * Gets the {@link FrameState} corresponding to the state of the JVM after execution of this 34 * node. 35 */ 36 FrameState stateAfter(); 37 38 /** 39 * Sets the {@link FrameState} corresponding to the state of the JVM after execution of this 40 * node. 41 */ 42 void setStateAfter(FrameState x); 43 44 /** 45 * Determines if this node has a side-effect. Such nodes cannot be safely re-executed because 46 * they modify state which is visible to other threads or modify state beyond what is captured 47 * in {@link FrameState} nodes. 48 */ 49 boolean hasSideEffect(); 50 }