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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/ClassGetClassLoader0Node.java @ 18262:f7d45e2426d4

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converted HotSpotObjectConstant to an interface
author Doug Simon <doug.simon@oracle.com>
date Wed, 05 Nov 2014 21:07:59 +0100
parents 9619ba4daf4c
children c7e0405a35d8
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1 /*
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2 * Copyright (c) 2014, 2014, 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.meta.*;
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28 import com.oracle.graal.hotspot.replacements.*;
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29 import com.oracle.graal.nodeinfo.*;
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30 import com.oracle.graal.nodes.*;
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31 import com.oracle.graal.replacements.nodes.*;
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32
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33 /**
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34 * {@link MacroNode Macro node} for {@link Class#getClassLoader0()}.
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35 *
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36 * @see ClassSubstitutions#getClassLoader0(Class)
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37 */
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38 @SuppressWarnings("javadoc")
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39 @NodeInfo
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40 public class ClassGetClassLoader0Node extends MacroStateSplitNode implements Canonicalizable {
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41
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42 public static ClassGetClassLoader0Node create(Invoke invoke) {
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43 return new ClassGetClassLoader0Node(invoke);
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44 }
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06c15e88d383 added factory method to all Node classes; replaced Node classes instantiation with calls to factory methods; replaced identity tests on Node classes with ' == <node class>.getGenClass()' idiom
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46 protected ClassGetClassLoader0Node(Invoke invoke) {
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47 super(invoke);
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48 }
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49
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50 private ValueNode getJavaClass() {
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51 return arguments.get(0);
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52 }
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53
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54 @Override
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55 public Node canonical(CanonicalizerTool tool) {
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56 ValueNode javaClass = getJavaClass();
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57 if (javaClass.isConstant()) {
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58 Class<?> c = (Class<?>) HotSpotObjectConstantImpl.asObject(javaClass.asJavaConstant());
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59 if (c != null) {
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60 /*
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61 * This is an intrinsic for getClassLoader0, which occurs after any security checks.
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62 * We can't call that directly so just call getClassLoader.
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63 */
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64 ClassLoader classLoader = c.getClassLoader();
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65 return ConstantNode.forConstant(HotSpotObjectConstantImpl.forObject(classLoader), tool.getMetaAccess());
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66 }
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67 }
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68 return this;
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69 }
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70 }