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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/ClassGetSuperclassNode.java @ 10902:4cda6853056e

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added ClassGetComponentTypeNode macro node
author Doug Simon <doug.simon@oracle.com>
date Mon, 29 Jul 2013 11:43:27 +0200
parents 2ed6b9c832be
children 4b8aa6386c12
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1 /*
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2 * Copyright (c) 2013, 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.hotspot.nodes;
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24
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25 import com.oracle.graal.hotspot.replacements.*;
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26 import com.oracle.graal.nodes.*;
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27 import com.oracle.graal.nodes.spi.*;
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28 import com.oracle.graal.replacements.nodes.*;
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29
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30 /**
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31 * {@link MacroNode Macro node} for {@link Class#getSuperclass()}.
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32 *
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33 * @see ClassSubstitutions#getSuperclass(Class)
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34 */
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35 public class ClassGetSuperclassNode extends MacroNode implements Canonicalizable, Lowerable {
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36
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37 public ClassGetSuperclassNode(Invoke invoke) {
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38 super(invoke);
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39 }
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40
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41 private ValueNode getJavaClass() {
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42 return arguments.get(0);
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43 }
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44
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45 public ValueNode canonical(CanonicalizerTool tool) {
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46 ValueNode javaClass = getJavaClass();
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47 if (javaClass.isConstant()) {
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48 Class c = (Class) javaClass.asConstant().asObject();
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49 Class superclass = c.getSuperclass();
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50 return ConstantNode.forObject(superclass, tool.runtime(), graph());
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51 }
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52 return this;
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53 }
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54 }