Mercurial > hg > graal-jvmci-8
view graal/GraalCompiler/src/com/sun/c1x/ir/Switch.java @ 2603:01c5c0443158
new node layout: Phi
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 06 May 2011 11:18:15 +0200 |
parents | 0c6564c254af |
children | a0dd2b907806 |
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/* * Copyright (c) 2009, 2010, 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 java.util.*; import com.oracle.graal.graph.*; import com.sun.c1x.value.*; import com.sun.cri.ci.*; /** * The {@code Switch} class is the base of both lookup and table switches. */ public abstract class Switch extends BlockEnd { private static final int INPUT_COUNT = 1; private static final int INPUT_VALUE = 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 provides the input value to this switch. */ public Value value() { return (Value) inputs().get(super.inputCount() + INPUT_VALUE); } public Value setValue(Value n) { return (Value) inputs().set(super.inputCount() + INPUT_VALUE, n); } /** * Constructs a new Switch. * @param value the instruction that provides the value to be switched over * @param successors the list of successors of this switch * @param stateBefore the state before the switch * @param isSafepoint {@code true} if this switch is a safepoint * @param graph */ public Switch(Value value, List<BlockBegin> successors, FrameState stateBefore, boolean isSafepoint, int inputCount, int successorCount, Graph graph) { super(CiKind.Illegal, stateBefore, isSafepoint, successors, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph); setValue(value); } /** * Gets the number of cases that this switch covers (excluding the default case). * @return the number of cases */ public int numberOfCases() { return blockSuccessorCount() - 1; } }