Mercurial > hg > truffle
view graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/RegisterValue.java @ 9125:5b25562f8bd7
assumptions: simplify hashCode()
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Fri, 12 Apr 2013 11:06:19 +0200 |
parents | ea1c2bed2bfa |
children | 149fe42411df |
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/* * Copyright (c) 2009, 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.api.code; import com.oracle.graal.api.meta.*; /** * Denotes a register that stores a value of a fixed kind. There is exactly one (canonical) instance * of {@link RegisterValue} for each ({@link Register}, {@link Kind}) pair. Use * {@link Register#asValue(Kind)} to retrieve the canonical {@link RegisterValue} instance for a * given (register,kind) pair. */ public final class RegisterValue extends AllocatableValue { private static final long serialVersionUID = 7999341472196897163L; private final Register reg; /** * Should only be called from {@link Register#Register} to ensure canonicalization. */ protected RegisterValue(Kind kind, Register register) { super(kind); this.reg = register; } @Override public int hashCode() { return (getRegister().number << 4) ^ getKind().ordinal(); } @Override public String toString() { return getRegister().name + getKindSuffix(); } /** * @return the register that contains the value */ public Register getRegister() { return reg; } }