001/*
002 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodeinfo;
024
025public enum InputType {
026    /**
027     * Inputs that consume an actual value generated by the referenced node.
028     */
029    Value,
030    /**
031     * Inputs that consume the memory state of the referenced node.
032     */
033    Memory,
034    /**
035     * Inputs that reference a condition.
036     */
037    Condition,
038    /**
039     * Inputs that reference a frame state.
040     */
041    State,
042    /**
043     * Inputs that reference a guard (guards, begin nodes).
044     */
045    Guard,
046    /**
047     * Inputs that reference an anchor (begin nodes, value anchors).
048     */
049    Anchor,
050    /**
051     * Inputs that represent an association between nodes, e.g., a phi and the merge or a loop begin
052     * and loop exits and ends.
053     */
054    Association,
055    /**
056     * Inputs that connect tightly coupled nodes, e.g., an InvokeNode and its CallTargetNode.
057     */
058    Extension,
059    /**
060     * Inputs of this type are temporarily exempt from type checking. This should only be used in
061     * exceptional cases and should never survive to later stages of compilation.
062     */
063    Unchecked
064}