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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Switch.java @ 2602:0c6564c254af
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author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 06 May 2011 10:25:37 +0200 |
parents | 16b9a8b5ad39 |
children | a0dd2b907806 |
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1 /* |
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2 * Copyright (c) 2009, 2010, 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.c1x.ir; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.oracle.graal.graph.*; |
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28 import com.sun.c1x.value.*; |
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29 import com.sun.cri.ci.*; |
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30 |
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31 /** |
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32 * The {@code Switch} class is the base of both lookup and table switches. |
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33 */ |
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34 public abstract class Switch extends BlockEnd { |
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35 |
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36 private static final int INPUT_COUNT = 1; |
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37 private static final int INPUT_VALUE = 0; |
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38 |
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39 private static final int SUCCESSOR_COUNT = 0; |
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40 |
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41 @Override |
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42 protected int inputCount() { |
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43 return super.inputCount() + INPUT_COUNT; |
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44 } |
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45 |
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46 @Override |
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47 protected int successorCount() { |
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48 return super.successorCount() + SUCCESSOR_COUNT; |
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49 } |
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50 |
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51 /** |
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52 * The instruction that provides the input value to this switch. |
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53 */ |
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54 public Value value() { |
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55 return (Value) inputs().get(super.inputCount() + INPUT_VALUE); |
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56 } |
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57 |
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58 public Value setValue(Value n) { |
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59 return (Value) inputs().set(super.inputCount() + INPUT_VALUE, n); |
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60 } |
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61 |
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62 /** |
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63 * Constructs a new Switch. |
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64 * @param value the instruction that provides the value to be switched over |
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65 * @param successors the list of successors of this switch |
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66 * @param stateBefore the state before the switch |
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67 * @param isSafepoint {@code true} if this switch is a safepoint |
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68 * @param graph |
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69 */ |
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70 public Switch(Value value, List<BlockBegin> successors, FrameState stateBefore, boolean isSafepoint, int inputCount, int successorCount, Graph graph) { |
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71 super(CiKind.Illegal, stateBefore, isSafepoint, successors, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph); |
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72 setValue(value); |
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73 } |
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74 |
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75 /** |
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76 * Gets the number of cases that this switch covers (excluding the default case). |
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77 * @return the number of cases |
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78 */ |
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79 public int numberOfCases() { |
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80 return blockSuccessorCount() - 1; |
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81 } |
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82 |
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83 } |