Mercurial > hg > truffle
annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiRegisterValue.java @ 5109:6766253384bf
more preparations for disabling runtime feedback selectively based on deoptimization history
author | Christian Haeubl <christian.haeubl@oracle.com> |
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date | Tue, 13 Mar 2012 18:53:33 -0700 |
parents | aaac4894175c |
children | 438ab53efdd0 |
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1 /* |
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2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.max.cri.ci; |
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24 |
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25 /** |
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26 * Denotes a register that stores a value of a fixed kind. There is exactly one (canonical) instance of {@code |
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27 * CiRegisterValue} for each ({@link CiRegister}, {@link CiKind}) pair. Use {@link CiRegister#asValue(CiKind)} to |
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28 * retrieve the canonical {@link CiRegisterValue} instance for a given (register,kind) pair. |
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29 */ |
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30 public final class CiRegisterValue extends CiValue { |
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31 private static final long serialVersionUID = 7999341472196897163L; |
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32 |
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33 /** |
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34 * The register. |
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35 */ |
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36 public final CiRegister reg; |
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37 |
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38 /** |
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39 * Should only be called from {@link CiRegister#CiRegister} to ensure canonicalization. |
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40 */ |
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41 protected CiRegisterValue(CiKind kind, CiRegister register) { |
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42 super(kind); |
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43 this.reg = register; |
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44 } |
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45 |
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46 @Override |
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47 public int hashCode() { |
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48 return (reg.number << 4) ^ kind.ordinal(); |
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49 } |
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50 |
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51 @Override |
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52 public String toString() { |
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53 return reg.name + kindSuffix(); |
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54 } |
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55 } |