Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/ir/Switch.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/ir/Switch.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,75 @@ +/* + * 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.sun.c1x.value.*; +import com.sun.cri.ci.*; + +/** + * The {@code Switch} class is the base of both lookup and table switches. + * + * @author Ben L. Titzer + */ +public abstract class Switch extends BlockEnd { + + Value value; + + /** + * 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 + */ + public Switch(Value value, List<BlockBegin> successors, FrameState stateBefore, boolean isSafepoint) { + super(CiKind.Illegal, stateBefore, isSafepoint, successors); + this.value = value; + } + + /** + * Gets the instruction that provides the input value to this switch. + * @return the instruction producing the input value + */ + public Value value() { + return value; + } + + /** + * Gets the number of cases that this switch covers (excluding the default case). + * @return the number of cases + */ + public int numberOfCases() { + return successors.size() - 1; + } + + /** + * Iterates over the inputs to this instruction. + * @param closure the closure to apply + */ + @Override + public void inputValuesDo(ValueClosure closure) { + value = closure.apply(value); + } +}