Mercurial > hg > graal-jvmci-8
view graal/GraalCompiler/src/com/sun/c1x/ir/Throw.java @ 2756:bfcdda4fdd73
Removed the direct connection between BlockBegin and BlockEnd.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
---|---|
date | Fri, 20 May 2011 14:51:45 +0200 |
parents | 3ac3dd97d8df |
children | ca31e84ff154 |
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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.c1x.value.*; import com.sun.cri.ci.*; /** * The {@code Throw} instruction represents a throw of an exception. */ public final class Throw extends BlockEnd implements ExceptionEdgeInstruction { private static final int INPUT_COUNT = 2; private static final int INPUT_EXCEPTION = 0; private static final int INPUT_STATE_BEFORE = 1; private static final int SUCCESSOR_COUNT = 1; private static final int SUCCESSOR_EXCEPTION_EDGE = 0; @Override protected int inputCount() { return super.inputCount() + INPUT_COUNT; } @Override protected int successorCount() { return super.successorCount() + SUCCESSOR_COUNT; } /** * The instruction which produces the exception to throw. */ 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); } /** * The state for this instruction. */ public FrameState stateBefore() { return (FrameState) inputs().get(super.inputCount() + INPUT_STATE_BEFORE); } public FrameState setStateBefore(FrameState n) { return (FrameState) inputs().set(super.inputCount() + INPUT_STATE_BEFORE, n); } /** * The entry to the exception dispatch chain for this throw. * TODO ls: this needs more cleanup - throw should either unwind or jump to the exception dispatch chain */ @Override public BlockBegin exceptionEdge() { return (BlockBegin) successors().get(super.successorCount() + SUCCESSOR_EXCEPTION_EDGE); } public BlockBegin setExceptionEdge(BlockBegin n) { return (BlockBegin) successors().set(super.successorCount() + SUCCESSOR_EXCEPTION_EDGE, n); } /** * Creates a new Throw instruction. * @param exception the instruction that generates the exception to throw * @param stateAfter the state before the exception is thrown but after the exception object has been popped * @param isSafepoint {@code true} if this instruction is a safepoint instruction * @param graph */ public Throw(Value exception, Graph graph) { super(CiKind.Illegal, null, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph); setException(exception); } @Override public void accept(ValueVisitor v) { v.visitThrow(this); } @Override public void print(LogStream out) { out.print("throw ").print(exception()); } }