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  */
  23 package org.graalvm.compiler.nodeinfo;
  24 
  25 public 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 }