Mercurial > hg > graal-compiler
view 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 |
parents | |
children | a0dd2b907806 |
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/* * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.c1x.ir; import com.oracle.graal.graph.*; import com.sun.c1x.debug.*; import com.sun.cri.ci.*; /** * Unwind takes an exception object, destroys the current stack frame and passes the exception object to the system's exception dispatch code. */ public final class Unwind extends BlockEnd { private static final int INPUT_COUNT = 1; private static final int INPUT_EXCEPTION = 0; private static final int SUCCESSOR_COUNT = 0; @Override protected int inputCount() { return super.inputCount() + INPUT_COUNT; } @Override protected int successorCount() { return super.successorCount() + SUCCESSOR_COUNT; } /** * The instruction that produces the exception object. */ public Value exception() { return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION); } public Value setException(Value n) { assert n == null || n.kind == CiKind.Object; return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n); } public Unwind(Value exception, boolean isSafepoint, Graph graph) { super(CiKind.Object, null, isSafepoint, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph); setException(exception); } @Override public void accept(ValueVisitor v) { v.visitUnwind(this); } @Override public void print(LogStream out) { out.print(kind.typeChar).print("unwind ").print(exception()); } }