--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/StateSplit.java 2017-02-15 17:06:51.670203100 -0800 @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.nodes; + +import org.graalvm.compiler.nodes.spi.NodeWithState; + +/** + * A state split is a node that may have a frame state associated with it. + */ +public interface StateSplit extends NodeWithState { + + /** + * Gets the {@link FrameState} corresponding to the state of the JVM after execution of this + * node. + */ + FrameState stateAfter(); + + /** + * Sets the {@link FrameState} corresponding to the state of the JVM after execution of this + * node. + */ + void setStateAfter(FrameState x); + + /** + * Determines if this node has a side-effect. Such nodes cannot be safely re-executed because + * they modify state which is visible to other threads or modify state beyond what is captured + * in {@link FrameState} nodes. + */ + boolean hasSideEffect(); +}