Mercurial > hg > truffle
diff graal/com.oracle.max.graal.compiler/src/com/sun/c1x/ir/ExceptionDispatch.java @ 2872:0341b6424579
Project renaming.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
---|---|
date | Wed, 08 Jun 2011 08:42:25 +0200 |
parents | graal/GraalCompiler/src/com/sun/c1x/ir/ExceptionDispatch.java@14708c03abba |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.max.graal.compiler/src/com/sun/c1x/ir/ExceptionDispatch.java Wed Jun 08 08:42:25 2011 +0200 @@ -0,0 +1,133 @@ +/* + * 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(); + } + + @Override + public Node copy(Graph into) { + ExceptionDispatch x = new ExceptionDispatch(null, null, null, catchType, into); + return x; + } +}