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annotate graal/GraalCompiler/src/com/sun/c1x/ir/TableSwitch.java @ 2634:4dd0573f510b
FrameState fixes.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 10:52:37 +0200 |
parents | 0c6564c254af |
children | a0dd2b907806 |
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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.c1x.ir; |
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24 |
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25 import static com.sun.c1x.debug.InstructionPrinter.InstructionLineColumn.*; |
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26 |
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27 import java.util.*; |
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28 |
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29 import com.oracle.graal.graph.*; |
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30 import com.sun.c1x.debug.*; |
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31 import com.sun.c1x.value.*; |
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32 |
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33 /** |
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34 * The {@code TableSwitch} instruction represents a table switch. |
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35 */ |
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36 public final class TableSwitch extends Switch { |
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37 |
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38 private static final int INPUT_COUNT = 0; |
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39 private static final int SUCCESSOR_COUNT = 0; |
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40 |
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41 final int lowKey; |
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42 |
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43 /** |
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44 * Constructs a new TableSwitch instruction. |
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45 * @param value the instruction producing the value being switched on |
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46 * @param successors the list of successors |
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47 * @param lowKey the lowest integer key in the table |
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48 * @param stateBefore the state before the switch |
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49 * @param isSafepoint {@code true} if this instruction is a safepoint |
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50 * @param graph |
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51 */ |
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52 public TableSwitch(Value value, List<BlockBegin> successors, int lowKey, FrameState stateBefore, boolean isSafepoint, Graph graph) { |
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53 super(value, successors, stateBefore, isSafepoint, INPUT_COUNT, SUCCESSOR_COUNT, graph); |
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54 this.lowKey = lowKey; |
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55 } |
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56 |
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57 /** |
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58 * Gets the lowest key in the table switch (inclusive). |
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59 * @return the low key |
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60 */ |
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61 public int lowKey() { |
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62 return lowKey; |
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63 } |
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64 |
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65 /** |
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66 * Gets the highest key in the table switch (exclusive). |
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67 * @return the high key |
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68 */ |
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69 public int highKey() { |
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70 return lowKey + numberOfCases(); |
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71 } |
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72 |
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73 @Override |
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74 public void accept(ValueVisitor v) { |
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75 v.visitTableSwitch(this); |
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76 } |
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77 |
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78 @Override |
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79 public void print(LogStream out) { |
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80 out.print("tableswitch "); |
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81 if (isSafepoint()) { |
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82 out.print("(safepoint) "); |
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83 } |
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84 out.println(value()); |
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85 int l = numberOfCases(); |
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86 for (int i = 0; i < l; i++) { |
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87 INSTRUCTION.advance(out); |
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88 out.printf("case %5d: B%d%n", lowKey() + i, blockSuccessors().get(i).blockID); |
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89 } |
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90 INSTRUCTION.advance(out); |
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91 out.print("default : B").print(defaultSuccessor().blockID); |
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92 } |
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93 } |