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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/SwitchNode.java @ 5443:141817e206d4

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changes to the dependencies and stamp system: * dependencies can only be of type ValueNode * exactType is a boolean flag, not a separate RiResolvedType * use different Stamp subclasses for IntegerStamp, FloatStamp, ObjectStamp and GenericStamp * use different stamp for nodes that can be a target for dependencies * use different PhiNode constructors for value- and non-value-Phis * use correct stamps for ExceptionObjectNode and CurrentThread
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 25 May 2012 11:35:18 +0200
parents e808627bd16f
children 764db9ada24f
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1 /*
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.nodes.extended;
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25 import com.oracle.graal.nodes.*;
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26 import com.oracle.graal.nodes.type.*;
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28 /**
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29 * The {@code SwitchNode} class is the base of both lookup and table switches.
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30 */
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31 public abstract class SwitchNode extends ControlSplitNode {
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33 @Input private ValueNode value;
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35 public ValueNode value() {
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36 return value;
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37 }
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39 /**
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40 * Constructs a new Switch.
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41 * @param value the instruction that provides the value to be switched over
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42 * @param successors the list of successors of this switch
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43 * @param stateAfter the state after the switch
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44 */
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45 public SwitchNode(ValueNode value, BeginNode[] successors, double[] probability) {
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46 super(StampFactory.forVoid(), successors, probability);
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47 this.value = value;
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48 }
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50 /**
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51 * Gets the number of cases that this switch covers (excluding the default case).
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52 * @return the number of cases
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53 */
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54 public int numberOfCases() {
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55 return blockSuccessorCount() - 1;
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56 }
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57 }