Mercurial > hg > graal-compiler
annotate graal/GraalCompiler/src/com/sun/c1x/ir/Unwind.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 |
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children | a0dd2b907806 |
rev | line source |
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2707
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1 /* |
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2 * Copyright (c) 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.cri.ci.*; |
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28 |
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29 /** |
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30 * Unwind takes an exception object, destroys the current stack frame and passes the exception object to the system's exception dispatch code. |
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31 */ |
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32 public final class Unwind extends BlockEnd { |
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33 |
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34 private static final int INPUT_COUNT = 1; |
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35 private static final int INPUT_EXCEPTION = 0; |
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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 that produces the exception object. |
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51 */ |
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52 public Value exception() { |
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53 return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION); |
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54 } |
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55 |
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56 public Value setException(Value n) { |
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57 assert n == null || n.kind == CiKind.Object; |
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58 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n); |
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59 } |
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60 |
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61 public Unwind(Value exception, boolean isSafepoint, Graph graph) { |
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62 super(CiKind.Object, null, isSafepoint, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph); |
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63 setException(exception); |
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64 } |
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65 |
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66 @Override |
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67 public void accept(ValueVisitor v) { |
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68 v.visitUnwind(this); |
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69 } |
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70 |
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71 @Override |
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72 public void print(LogStream out) { |
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73 out.print(kind.typeChar).print("unwind ").print(exception()); |
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74 } |
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75 } |