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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/AllocaNode.java @ 16811:5d468add216f

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added @NodeInfo annotations to all Node classes
author Doug Simon <doug.simon@oracle.com>
date Wed, 13 Aug 2014 18:25:45 +0200
parents c260582ba074
children cbd42807a31f
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1 /*
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2 * Copyright (c) 2012, 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 java.util.*;
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26
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27 import com.oracle.graal.api.code.*;
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28 import com.oracle.graal.api.meta.*;
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29 import com.oracle.graal.compiler.common.type.*;
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30 import com.oracle.graal.graph.*;
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31 import com.oracle.graal.hotspot.*;
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32 import com.oracle.graal.nodes.*;
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33 import com.oracle.graal.nodes.spi.*;
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34
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35 /**
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36 * Reserves a block of memory in the stack frame of a method. The block is reserved in the frame for
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37 * the entire execution of the associated method.
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38 */
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39 @NodeInfo
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40 public class AllocaNode extends FixedWithNextNode implements LIRLowerable {
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41
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42 /**
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43 * The number of slots in block.
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44 */
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45 private final int slots;
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46
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47 /**
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48 * The indexes of the object pointer slots in the block. Each such object pointer slot must be
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49 * initialized before any safepoint in the method otherwise the garbage collector will see
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50 * garbage values when processing these slots.
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51 */
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52 private final BitSet objects;
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53
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54 public AllocaNode(int slots, BitSet objects) {
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55 super(StampFactory.forKind(HotSpotGraalRuntime.getHostWordKind()));
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56 this.slots = slots;
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57 this.objects = objects;
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58 }
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59
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60 @Override
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61 public void generate(NodeLIRBuilderTool gen) {
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62 StackSlot array = gen.getLIRGeneratorTool().getResult().getFrameMap().allocateStackSlots(slots, objects, null);
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63 Value result = gen.getLIRGeneratorTool().emitAddress(array);
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64 gen.setResult(this, result);
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65 }
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66 }