Mercurial > hg > truffle
view graal/com.oracle.graal.lir/src/com/oracle/graal/lir/Variable.java @ 9631:3c9aeef2702c
Value: provide proper `hashCode()' and `equals()' implementations
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Fri, 10 May 2013 12:43:43 +0200 |
parents | 3ec29630cfb4 |
children | 65d7696fb58a |
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/* * Copyright (c) 2010, 2012, 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 com.oracle.graal.lir; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; /** * Represents a value that is yet to be bound to a machine location (such as a {@link RegisterValue} * or {@link StackSlot}) by a register allocator. */ public final class Variable extends AllocatableValue { private static final long serialVersionUID = 4507578431686109809L; /** * The identifier of the variable. This is a non-zero index in a contiguous 0-based name space. */ public final int index; /** * Creates a new variable. * * @param kind * @param index */ public Variable(PlatformKind kind, int index) { super(kind); assert index >= 0; this.index = index; } @Override public String toString() { return "v" + index + getKindSuffix(); } @Override public int hashCode() { return 31 * super.hashCode() + index; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!super.equals(obj)) { return false; } if (getClass() != obj.getClass()) { return false; } Variable other = (Variable) obj; if (index != other.index) { return false; } return true; } }