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annotate graal/GraalCompiler/src/com/sun/c1x/ir/AccessMonitor.java @ 2822:530366123e46

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Invoke is a block end
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Fri, 27 May 2011 15:41:10 +0200
parents 569228710be8
children
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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 com.oracle.graal.graph.*;
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26 import com.sun.cri.ci.*;
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27
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28 /**
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29 * The {@code AccessMonitor} instruction is the base class of both monitor acquisition and release.
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30 */
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31 public abstract class AccessMonitor extends StateSplit {
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32
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33 private static final int INPUT_COUNT = 2;
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34 private static final int INPUT_OBJECT = 0;
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35 private static final int INPUT_LOCK_ADDRESS = 1;
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36
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37 private static final int SUCCESSOR_COUNT = 0;
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38
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39 @Override
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40 protected int inputCount() {
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41 return super.inputCount() + INPUT_COUNT;
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42 }
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43
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44 @Override
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45 protected int successorCount() {
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46 return super.successorCount() + SUCCESSOR_COUNT;
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47 }
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48
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49 /**
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50 * The instruction producing the object locked or unlocked by this instruction.
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51 */
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52 public Value object() {
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53 return (Value) inputs().get(super.inputCount() + INPUT_OBJECT);
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54 }
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55
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56 public Value setObject(Value n) {
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57 return (Value) inputs().set(super.inputCount() + INPUT_OBJECT, n);
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58 }
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59
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60 /**
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61 * The instruction producing the address of the lock object.
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62 */
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63 public Value lockAddress() {
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64 return (Value) inputs().get(super.inputCount() + INPUT_LOCK_ADDRESS);
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65 }
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66
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67 public Value setLockAddress(Value n) {
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68 return (Value) inputs().set(super.inputCount() + INPUT_LOCK_ADDRESS, n);
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69 }
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70
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71 /**
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72 * The lock number of this monitor access.
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73 */
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74 public final int lockNumber;
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75
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76 /**
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77 * Creates a new AccessMonitor instruction.
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78 *
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79 * @param object the instruction producing the object
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80 * @param lockAddress the address of the on-stack lock object or {@code null} if the runtime does not place locks on the stack
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81 * @param stateBefore the state before executing the monitor operation
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82 * @param lockNumber the number of the lock being acquired
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83 * @param inputCount
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84 * @param successorCount
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85 * @param graph
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86 */
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87 public AccessMonitor(Value object, Value lockAddress, int lockNumber, int inputCount, int successorCount, Graph graph) {
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88 super(CiKind.Illegal, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
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89 this.lockNumber = lockNumber;
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90 setObject(object);
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91 setLockAddress(lockAddress);
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92 }
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93 }