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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/UnsafeLoadNode.java @ 7090:05ce1defa4f9

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Common out some parts of UnsafeLoad/Store in UnsafeAccess
author Gilles Duboscq <duboscq@ssw.jku.at>
date Thu, 29 Nov 2012 13:24:08 +0100
parents ccade022ec83
children 08fe3a509cf1
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1 /*
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2 * Copyright (c) 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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24
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25 import com.oracle.graal.api.meta.*;
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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.nodes.type.*;
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29 import com.oracle.graal.nodes.virtual.*;
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30
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31 /**
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32 * Load of a value from a location specified as an offset relative to an object.
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33 * No null check is performed before the load.
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34 */
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35 public class UnsafeLoadNode extends UnsafeAccessNode implements Lowerable, Virtualizable {
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36
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37 public UnsafeLoadNode(ValueNode object, int displacement, ValueNode offset, boolean nonNull) {
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38 this(nonNull ? StampFactory.objectNonNull() : StampFactory.object(), object, displacement, offset, Kind.Object);
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39 }
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40
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41 public UnsafeLoadNode(ValueNode object, int displacement, ValueNode offset, Kind accessKind) {
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42 this(StampFactory.forKind(accessKind.getStackKind()), object, displacement, offset, accessKind);
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43 }
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44
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45 public UnsafeLoadNode(Stamp stamp, ValueNode object, int displacement, ValueNode offset, Kind accessKind) {
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46 super(stamp, object, displacement, offset, accessKind);
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47 }
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48
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49 @Override
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50 public void lower(LoweringTool tool) {
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51 tool.getRuntime().lower(this, tool);
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52 }
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53
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54 @Override
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55 public void virtualize(VirtualizerTool tool) {
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56 VirtualObjectNode virtual = tool.getVirtualState(object());
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57 if (virtual != null) {
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58 ValueNode indexValue = tool.getReplacedValue(offset());
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59 if (indexValue.isConstant()) {
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60 int fieldIndex = virtual.fieldIndexForOffset(indexValue.asConstant().asLong());
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61 if (fieldIndex != -1) {
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62 ValueNode result = tool.getVirtualEntry(virtual, fieldIndex);
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63 VirtualObjectNode virtualResult = tool.getVirtualState(result);
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64 if (virtualResult != null) {
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65 tool.replaceWithVirtual(virtualResult);
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66 } else {
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67 tool.replaceWithValue(result);
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68 }
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69 }
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70 }
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71 }
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72 }
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73
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74 @NodeIntrinsic
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75 public static native <T> T load(Object object, @ConstantNodeParameter int displacement, long offset, @ConstantNodeParameter Kind kind);
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76
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77 @NodeIntrinsic
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78 public static native Object loadObject(Object object, @ConstantNodeParameter int displacement, long offset, @ConstantNodeParameter boolean nonNull);
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79 }