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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/LocationNode.java @ 21678:7355942cb270

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Improve lowering of the type check node.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Wed, 03 Jun 2015 01:10:18 +0200
parents 48c1ebd24120
children
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1 /*
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2 * Copyright (c) 2011, 2015, 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.compiler.common.type.*;
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26 import com.oracle.graal.graph.Node.ValueNumberable;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.lir.gen.*;
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29 import com.oracle.graal.nodeinfo.*;
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30 import com.oracle.graal.nodes.calc.*;
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31 import com.oracle.graal.nodes.spi.*;
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32 import com.oracle.jvmci.meta.*;
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33
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34 /**
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35 * A location for a memory access in terms of the kind of value accessed and how to access it. All
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36 * locations have the form [base + location], where base is a node and location is defined by
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37 * subclasses of the {@link LocationNode}.
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38 */
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39 @NodeInfo(allowedUsageTypes = {InputType.Association})
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40 public abstract class LocationNode extends FloatingNode implements LIRLowerable, ValueNumberable {
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41
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42 public static final NodeClass<LocationNode> TYPE = NodeClass.create(LocationNode.class);
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43
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44 /**
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45 * Marker interface for locations in snippets.
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46 */
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47 public interface Location {
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48 }
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49
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50 protected LocationNode(NodeClass<? extends LocationNode> c, Stamp stamp) {
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51 super(c, stamp);
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52 }
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53
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54 /**
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55 * Returns the identity of the accessed memory location.
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56 */
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57 public abstract LocationIdentity getLocationIdentity();
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58
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59 @Override
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60 public final void generate(NodeLIRBuilderTool generator) {
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61 // nothing to do...
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62 }
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63
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64 public abstract Value generateAddress(NodeMappableLIRBuilder builder, LIRGeneratorTool gen, Value base);
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66 /**
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67 * @return the range of the displacement as a 64-bit integer stamp
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68 */
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69 public abstract IntegerStamp getDisplacementStamp();
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70 }