Mercurial > hg > graal-jvmci-8
annotate graal/GraalCompiler/src/com/sun/c1x/ir/Throw.java @ 2783:9bc0c2eb00d6
Made graph builder removal of BlockBegin work.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 25 May 2011 12:04:58 +0200 |
parents | bda5972a40a5 |
children | bd17ac598c6e |
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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.c1x.debug.*; |
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27 import com.sun.c1x.value.*; |
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28 import com.sun.cri.ci.*; |
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29 |
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30 /** |
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31 * The {@code Throw} instruction represents a throw of an exception. |
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32 */ |
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33 public final class Throw extends BlockEnd implements ExceptionEdgeInstruction { |
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34 |
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35 private static final int INPUT_COUNT = 2; |
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36 private static final int INPUT_EXCEPTION = 0; |
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37 private static final int INPUT_STATE_BEFORE = 1; |
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38 |
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39 private static final int SUCCESSOR_COUNT = 1; |
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40 private static final int SUCCESSOR_EXCEPTION_EDGE = 0; |
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41 |
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42 @Override |
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43 protected int inputCount() { |
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44 return super.inputCount() + INPUT_COUNT; |
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45 } |
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46 |
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47 @Override |
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48 protected int successorCount() { |
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49 return super.successorCount() + SUCCESSOR_COUNT; |
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50 } |
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51 |
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52 /** |
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53 * The instruction which produces the exception to throw. |
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54 */ |
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55 public Value exception() { |
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56 return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION); |
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57 } |
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58 |
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59 public Value setException(Value n) { |
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60 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n); |
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61 } |
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62 |
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63 /** |
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64 * The state for this instruction. |
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65 */ |
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66 public FrameState stateBefore() { |
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67 return (FrameState) inputs().get(super.inputCount() + INPUT_STATE_BEFORE); |
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68 } |
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69 |
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70 public FrameState setStateBefore(FrameState n) { |
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71 return (FrameState) inputs().set(super.inputCount() + INPUT_STATE_BEFORE, n); |
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72 } |
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73 |
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74 /** |
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75 * The entry to the exception dispatch chain for this throw. |
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76 * TODO ls: this needs more cleanup - throw should either unwind or jump to the exception dispatch chain |
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77 */ |
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78 @Override |
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79 public Instruction exceptionEdge() { |
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80 return (Instruction) successors().get(super.successorCount() + SUCCESSOR_EXCEPTION_EDGE); |
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81 } |
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82 |
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83 public Instruction setExceptionEdge(Instruction n) { |
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84 return (Instruction) successors().set(super.successorCount() + SUCCESSOR_EXCEPTION_EDGE, n); |
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85 } |
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86 |
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87 /** |
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88 * Creates a new Throw instruction. |
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89 * @param exception the instruction that generates the exception to throw |
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90 * @param stateAfter the state before the exception is thrown but after the exception object has been popped |
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91 * @param graph |
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92 */ |
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93 public Throw(Value exception, Graph graph) { |
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94 super(CiKind.Illegal, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph); |
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95 setException(exception); |
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96 } |
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97 |
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98 @Override |
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99 public void accept(ValueVisitor v) { |
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100 v.visitThrow(this); |
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101 } |
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102 |
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103 @Override |
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104 public void print(LogStream out) { |
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105 out.print("throw ").print(exception()); |
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106 } |
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107 } |