Mercurial > hg > graal-jvmci-8
view graal/GraalCompiler/src/com/sun/c1x/ir/ExceptionDispatch.java @ 2824:244921d7cf50
Merge
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Mon, 30 May 2011 16:41:05 +0200 |
parents | d3fc4fe063bf |
children | bd17ac598c6e |
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/* * Copyright (c) 2009, 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.*; import com.sun.cri.ri.*; /** * This instruction takes an exception object and has two successors: * The catchSuccessor is called whenever the exception matches the given type, otherwise otherSuccessor is called. */ public final class ExceptionDispatch 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 producing the exception object. */ public Value exception() { return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION); } public Value setException(Value n) { return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n); } private final RiType catchType; /** * Constructs a new ExceptionDispatch instruction. */ public ExceptionDispatch(Value exception, Instruction catchSuccessor, Instruction otherSuccessor, RiType catchType, Graph graph) { super(CiKind.Int, 2, INPUT_COUNT, SUCCESSOR_COUNT, graph); setException(exception); setBlockSuccessor(0, otherSuccessor); setBlockSuccessor(1, catchSuccessor); this.catchType = catchType; } public RiType catchType() { return catchType; } /** * Gets the block corresponding to the catch block. * @return the true successor */ public Instruction catchSuccessor() { return blockSuccessor(1); } /** * Gets the block corresponding to the rest of the dispatch chain. * @return the false successor */ public Instruction otherSuccessor() { return blockSuccessor(0); } /** * Gets the block corresponding to the specified outcome of the branch. * @param istrue {@code true} if the true successor is requested, {@code false} otherwise * @return the corresponding successor */ public Instruction successor(boolean istrue) { return blockSuccessor(istrue ? 1 : 0); } @Override public void accept(ValueVisitor v) { v.visitExceptionDispatch(this); } @Override public void print(LogStream out) { out.print("exception_dispatch "). print(exception()). print(' '). print("instanceof"). print(' '). print(catchType().name()). print(" then "). print(blockSuccessors().get(1).toString()). print(" else B"). print(blockSuccessors().get(0).toString()); } @Override public String shortName() { return "Dispatch " + catchType().name(); } }