Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/ir/ExceptionDispatch.java @ 2707:7ed72769d51a
exception handling related changes:
* changed blockPredecessors to list of Instructions, instead of Blocks
* removed explicit predecessor management in BlockBegin, now using predecessors from Graph structure
* replaced generated LIR exception entries with exception dispatch chains in IR
* added Unwind and ExceptionDispatch instructions
* removed ExceptionEntry flag in BlockBegin and all code depending on it
* removed exceptionHandler list from Instruction, replaced by exception Edge on Invoke and Throw
* replaced list of ExceptionHandlers with single exception edge in debug info
misc:
* changed GraphvizPrinter layout (smaller ports on large nodes)
* removed defunct run config
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 18 May 2011 18:09:20 +0200 |
parents | |
children | a0dd2b907806 |
rev | line source |
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2707
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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 * This instruction takes an exception object and has two successors: |
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32 * The catchSuccessor is called whenever the exception matches the given type, otherwise otherSuccessor is called. |
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33 */ |
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34 public final class ExceptionDispatch 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_EXCEPTION = 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 producing the exception object. |
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53 */ |
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54 public Value exception() { |
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55 return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION); |
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56 } |
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57 |
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58 public Value setException(Value n) { |
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59 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n); |
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60 } |
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61 |
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62 private final ExceptionHandler handler; |
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63 |
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64 /** |
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65 * Constructs a new ExceptionDispatch instruction. |
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66 */ |
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67 public ExceptionDispatch(Value exception, BlockBegin catchSuccessor, BlockBegin otherSuccessor, ExceptionHandler handler, FrameState stateAfter, boolean isSafepoint, Graph graph) { |
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68 super(CiKind.Int, stateAfter, isSafepoint, 2, INPUT_COUNT, SUCCESSOR_COUNT, graph); |
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69 setException(exception); |
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70 setBlockSuccessor(0, otherSuccessor); |
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71 setBlockSuccessor(1, catchSuccessor); |
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72 this.handler = handler; |
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73 } |
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74 |
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75 public ExceptionHandler handler() { |
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76 return handler; |
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77 } |
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78 |
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79 /** |
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80 * Gets the block corresponding to the catch block. |
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81 * @return the true successor |
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82 */ |
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83 public BlockBegin catchSuccessor() { |
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84 return blockSuccessor(1); |
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85 } |
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86 |
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87 /** |
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88 * Gets the block corresponding to the rest of the dispatch chain. |
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89 * @return the false successor |
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90 */ |
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91 public BlockBegin otherSuccessor() { |
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92 return blockSuccessor(0); |
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93 } |
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94 |
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95 /** |
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96 * Gets the block corresponding to the specified outcome of the branch. |
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97 * @param istrue {@code true} if the true successor is requested, {@code false} otherwise |
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98 * @return the corresponding successor |
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99 */ |
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100 public BlockBegin successor(boolean istrue) { |
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101 return blockSuccessor(istrue ? 1 : 0); |
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102 } |
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103 |
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104 /** |
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105 * Swaps the successor blocks to this if and negates the condition (e.g. == goes to !=) |
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106 * @see Condition#negate() |
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107 */ |
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108 public void swapSuccessors() { |
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109 BlockBegin t = blockSuccessor(0); |
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110 BlockBegin f = blockSuccessor(1); |
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111 setBlockSuccessor(0, f); |
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112 setBlockSuccessor(1, t); |
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113 } |
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114 |
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115 @Override |
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116 public void accept(ValueVisitor v) { |
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117 v.visitExceptionDispatch(this); |
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118 } |
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119 |
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120 @Override |
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121 public void print(LogStream out) { |
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122 out.print("exception_dispatch "). |
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123 print(exception()). |
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124 print(' '). |
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125 print("instanceof"). |
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126 print(' '). |
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127 print(handler.handler.catchType().name()). |
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128 print(" then B"). |
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129 print(blockSuccessors().get(1).blockID). |
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130 print(" else B"). |
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131 print(blockSuccessors().get(0).blockID); |
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132 if (isSafepoint()) { |
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133 out.print(" (safepoint)"); |
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134 } |
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135 } |
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136 |
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137 @Override |
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138 public String shortName() { |
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139 return "Dispatch " + handler.handler.catchType().name(); |
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140 } |
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141 |
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142 |
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143 } |