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annotate graal/GraalCompiler/src/com/sun/c1x/ir/LookupSwitch.java @ 2750:6048da340364

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less references to BlockBegin in BlockEnd instructions
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 20 May 2011 14:22:19 +0200
parents a3cd5eb68837
children ca31e84ff154
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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 LookupSwitch} instruction represents a lookup switch bytecode, which has a sorted
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35 * array of key values.
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36 */
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37 public final class LookupSwitch extends Switch {
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38
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39 private static final int INPUT_COUNT = 0;
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40 private static final int SUCCESSOR_COUNT = 0;
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41
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42 final int[] keys;
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43
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44 /**
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45 * Constructs a new LookupSwitch instruction.
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46 * @param value the instruction producing the value being switched on
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47 * @param successors the list of successors
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48 * @param keys the list of keys, sorted
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49 * @param stateAfter the state after the switch
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50 * @param isSafepoint {@code true} if this instruction is a safepoint
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51 * @param graph
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52 */
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53 public LookupSwitch(Value value, List<? extends Instruction> successors, int[] keys, FrameState stateAfter, Graph graph) {
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54 super(value, successors, stateAfter, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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55 this.keys = keys;
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56 }
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57
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58 /**
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59 * Gets the key at the specified index.
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60 * @param i the index
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61 * @return the key at that index
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62 */
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63 public int keyAt(int i) {
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64 return keys[i];
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65 }
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66
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67 public int keysLength() {
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68 return keys.length;
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69 }
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70
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71 @Override
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72 public void accept(ValueVisitor v) {
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73 v.visitLookupSwitch(this);
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74 }
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75
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76 @Override
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77 public void print(LogStream out) {
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78 out.print("lookupswitch ");
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79 out.println(value());
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80 int l = numberOfCases();
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81 for (int i = 0; i < l; i++) {
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82 INSTRUCTION.advance(out);
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83 out.printf("case %5d: B%d%n", keyAt(i), blockSuccessors().get(i).blockID);
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84 }
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85 INSTRUCTION.advance(out);
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86 out.print("default : B").print(defaultSuccessor().blockID);
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87 }
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88 }