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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/LoadFieldNode.java @ 5540:a891c53a295b

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Renaming RiKind => Kind.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Fri, 08 Jun 2012 23:47:42 +0200
parents e18ba36bfebc
children b4c406861c33
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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.java;
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24
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25 import com.oracle.graal.api.code.*;
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26 import com.oracle.graal.api.meta.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.nodes.*;
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29 import com.oracle.graal.nodes.spi.*;
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30 import com.oracle.graal.nodes.type.*;
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32 /**
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33 * The {@code LoadFieldNode} represents a read of a static or instance field.
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34 */
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35 public final class LoadFieldNode extends AccessFieldNode implements Canonicalizable, Node.IterableNodeType {
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37 /**
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38 * Creates a new LoadFieldNode instance.
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39 *
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40 * @param object the receiver object
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41 * @param field the compiler interface field
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42 */
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43 public LoadFieldNode(ValueNode object, RiResolvedField field, long leafGraphId) {
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44 super(createStamp(field), object, field, leafGraphId);
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45 }
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47 private static Stamp createStamp(RiResolvedField field) {
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48 Kind kind = field.kind();
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49 if (kind == Kind.Object && field.type() instanceof RiResolvedType) {
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50 return StampFactory.declared((RiResolvedType) field.type());
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51 } else {
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52 return StampFactory.forKind(kind);
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53 }
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54 }
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56 @Override
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57 public ValueNode canonical(CanonicalizerTool tool) {
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58 RiRuntime runtime = tool.runtime();
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59 if (runtime != null) {
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60 Constant constant = null;
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61 if (isStatic()) {
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62 constant = field().constantValue(null);
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63 } else if (object().isConstant() && !object().isNullConstant()) {
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64 constant = field().constantValue(object().asConstant());
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65 }
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66 if (constant != null) {
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67 return ConstantNode.forCiConstant(constant, runtime, graph());
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68 }
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69 }
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70 return this;
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71 }
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72 }