Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/Value.java @ 23341:67c84a8b19cc
fixed javadoc and implementation of MemoryAccessProvider methods to only throw IllegalArgumentException (JDK-8152024)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 30 Mar 2016 16:06:48 +0200 |
parents | 1bbd4a7c274b |
children | 9ed5b586018b |
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/* * Copyright (c) 2009, 2015, 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 jdk.vm.ci.meta; /** * Abstract base class for values. */ public abstract class Value { public static final Value[] NO_VALUES = new Value[0]; public static final AllocatableValue ILLEGAL = new IllegalValue(); private static final class IllegalValue extends AllocatableValue { private IllegalValue() { super(LIRKind.Illegal); } @Override public String toString() { return "-"; } @Override public boolean equals(Object other) { // Due to de-serialization this object may exist multiple times. So we compare classes // instead of the individual objects. (This anonymous class has always the same meaning) return other instanceof IllegalValue; } } private final LIRKind lirKind; /** * Initializes a new value of the specified kind. * * @param lirKind the kind */ protected Value(LIRKind lirKind) { this.lirKind = lirKind; } /** * Returns a String representation of the kind, which should be the end of all * {@link #toString()} implementation of subclasses. */ protected final String getKindSuffix() { return "|" + getPlatformKind().getTypeChar(); } public final LIRKind getLIRKind() { return lirKind; } /** * Returns the platform specific kind used to store this value. */ public final PlatformKind getPlatformKind() { return lirKind.getPlatformKind(); } @Override public int hashCode() { return 41 + lirKind.hashCode(); } @Override public boolean equals(Object obj) { if (obj instanceof Value) { Value that = (Value) obj; return lirKind.equals(that.lirKind); } return false; } /** * Checks if this value is identical to {@code other}. * * Warning: Use with caution! Usually equivalence {@link #equals(Object)} is sufficient and * should be used. */ public final boolean identityEquals(Value other) { return this == other; } }