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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/ClassGetSuperclassNode.java @ 11959:23ccaa863eda

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made CodeCacheProvider independent of MetaAccessProvider (GRAAL-511)
author Doug Simon <doug.simon@oracle.com>
date Thu, 10 Oct 2013 16:14:55 +0200
parents 51059863da73
children db4254246f9a
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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.graph.*;
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26 import com.oracle.graal.graph.spi.*;
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27 import com.oracle.graal.hotspot.replacements.*;
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28 import com.oracle.graal.nodes.*;
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29 import com.oracle.graal.replacements.nodes.*;
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30
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31 /**
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32 * {@link MacroNode Macro node} for {@link Class#getSuperclass()}.
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33 *
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34 * @see ClassSubstitutions#getSuperclass(Class)
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35 */
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36 public class ClassGetSuperclassNode extends MacroNode implements Canonicalizable {
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37
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38 public ClassGetSuperclassNode(Invoke invoke) {
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39 super(invoke);
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40 }
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41
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42 private ValueNode getJavaClass() {
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43 return arguments.get(0);
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44 }
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45
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46 @Override
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47 public Node canonical(CanonicalizerTool tool) {
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48 ValueNode javaClass = getJavaClass();
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49 if (javaClass.isConstant()) {
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50 Class c = (Class) javaClass.asConstant().asObject();
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51 if (c != null) {
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52 Class superclass = c.getSuperclass();
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53 return ConstantNode.forObject(superclass, tool.getMetaAccess(), graph());
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54 }
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55 }
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56 return this;
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57 }
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58 }