Mercurial > hg > graal-compiler
annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiRegisterValue.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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children | bc8527f3071c |
rev | line source |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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1 /* |
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2 * Copyright (c) 2009, 2011, 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.sun.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 |
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32 /** |
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33 * The register. |
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34 */ |
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35 public final CiRegister reg; |
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36 |
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37 /** |
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38 * Should only be called from {@link CiRegister#CiRegister} to ensure canonicalization. |
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39 */ |
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40 CiRegisterValue(CiKind kind, CiRegister register) { |
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41 super(kind); |
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42 this.reg = register; |
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43 } |
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44 |
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45 @Override |
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46 public int hashCode() { |
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47 return kind.ordinal() ^ reg.number; |
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48 } |
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49 |
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50 @Override |
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51 public boolean equals(Object o) { |
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52 return o == this; |
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53 } |
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54 |
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55 @Override |
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56 public boolean equalsIgnoringKind(CiValue other) { |
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57 if (other instanceof CiRegisterValue) { |
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58 return ((CiRegisterValue) other).reg == reg; |
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59 } |
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60 return false; |
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61 } |
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62 |
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63 @Override |
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64 public String name() { |
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65 return reg.name; |
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66 } |
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67 |
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68 @Override |
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69 public CiRegister asRegister() { |
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70 return reg; |
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71 } |
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72 } |