1/*
2 * Copyright (c) 2014, 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 */
23package org.graalvm.compiler.nodeinfo;
24
25public enum InputType {
26    /**
27     * Inputs that consume an actual value generated by the referenced node.
28     */
29    Value,
30    /**
31     * Inputs that consume the memory state of the referenced node.
32     */
33    Memory,
34    /**
35     * Inputs that reference a condition.
36     */
37    Condition,
38    /**
39     * Inputs that reference a frame state.
40     */
41    State,
42    /**
43     * Inputs that reference a guard (guards, begin nodes).
44     */
45    Guard,
46    /**
47     * Inputs that reference an anchor (begin nodes, value anchors).
48     */
49    Anchor,
50    /**
51     * Inputs that represent an association between nodes, e.g., a phi and the merge or a loop begin
52     * and loop exits and ends.
53     */
54    Association,
55    /**
56     * Inputs that connect tightly coupled nodes, e.g., an InvokeNode and its CallTargetNode.
57     */
58    Extension,
59    /**
60     * Inputs of this type are temporarily exempt from type checking. This should only be used in
61     * exceptional cases and should never survive to later stages of compilation.
62     */
63    Unchecked
64}
65