1 /*
   2  * Copyright (c) 2011, 2015, 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 static java.lang.Character.toLowerCase;
  26 
  27 import java.util.ArrayList;
  28 import java.util.Collection;
  29 
  30 import org.graalvm.compiler.graph.Node;
  31 import org.graalvm.compiler.nodeinfo.Verbosity;
  32 import org.graalvm.compiler.nodes.memory.MemoryNode;
  33 
  34 import jdk.vm.ci.meta.JavaKind;
  35 
  36 public class ValueNodeUtil {
  37 
  38     public static ValueNode assertKind(JavaKind kind, ValueNode x) {
  39         assert x != null && x.getStackKind() == kind : "kind=" + kind + ", value=" + x + ((x == null) ? "" : ", value.kind=" + x.getStackKind());
  40         return x;
  41     }
  42 
  43     public static RuntimeException shouldNotReachHere(String msg) {
  44         throw new InternalError("should not reach here: " + msg);
  45     }
  46 
  47     public static RuntimeException shouldNotReachHere() {
  48         throw new InternalError("should not reach here");
  49     }
  50 
  51     public static ValueNode assertLong(ValueNode x) {
  52         assert x != null && (x.getStackKind() == JavaKind.Long);
  53         return x;
  54     }
  55 
  56     public static ValueNode assertInt(ValueNode x) {
  57         assert x != null && (x.getStackKind() == JavaKind.Int);
  58         return x;
  59     }
  60 
  61     public static ValueNode assertFloat(ValueNode x) {
  62         assert x != null && (x.getStackKind() == JavaKind.Float);
  63         return x;
  64     }
  65 
  66     public static ValueNode assertObject(ValueNode x) {
  67         assert x != null && (x.getStackKind() == JavaKind.Object);
  68         return x;
  69     }
  70 
  71     public static ValueNode assertDouble(ValueNode x) {
  72         assert x != null && (x.getStackKind() == JavaKind.Double);
  73         return x;
  74     }
  75 
  76     public static void assertHigh(ValueNode x) {
  77         assert x == null;
  78     }
  79 
  80     @SuppressWarnings("unchecked")
  81     public static <T extends Node> Collection<T> filter(Iterable<Node> nodes, Class<T> clazz) {
  82         ArrayList<T> phis = new ArrayList<>();
  83         for (Node node : nodes) {
  84             if (clazz.isInstance(node)) {
  85                 phis.add((T) node);
  86             }
  87         }
  88         return phis;
  89     }
  90 
  91     /**
  92      * Converts a given instruction to a value string. The representation of an node as a value is
  93      * formed by concatenating the {@linkplain jdk.vm.ci.meta.JavaKind#getTypeChar character}
  94      * denoting its {@linkplain ValueNode#getStackKind kind} and its id. For example, {@code "i13"}.
  95      *
  96      * @param value the instruction to convert to a value string. If {@code value == null}, then "-"
  97      *            is returned.
  98      * @return the instruction representation as a string
  99      */
 100     public static String valueString(ValueNode value) {
 101         return (value == null) ? "-" : ("" + toLowerCase(value.getStackKind().getTypeChar()) + value.toString(Verbosity.Id));
 102     }
 103 
 104     public static ValueNode asNode(MemoryNode node) {
 105         if (node == null) {
 106             return null;
 107         } else {
 108             return node.asNode();
 109         }
 110     }
 111 }