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annotate graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/nodes/ExplodeLoopNode.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents fb66841a0994
children
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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.snippets.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.graph.*;
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28 import com.oracle.graal.nodes.*;
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29 import com.oracle.graal.nodes.type.*;
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30 import com.oracle.graal.snippets.Snippet.VarargsParameter;
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31
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32 /**
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33 * Placeholder node to denote to snippet preparation that the following loop must be completely
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34 * unrolled.
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35 *
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36 * @see VarargsParameter
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37 */
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38 public final class ExplodeLoopNode extends FixedWithNextNode {
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39
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40 public ExplodeLoopNode() {
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41 super(StampFactory.forVoid());
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42 }
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43
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44 public LoopBeginNode findLoopBegin() {
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45 Node next = next();
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46 ArrayList<Node> succs = new ArrayList<>();
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47 while (!(next instanceof LoopBeginNode)) {
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48 assert next != null : "cannot find loop after " + this;
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49 for (Node n : next.cfgSuccessors()) {
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50 succs.add(n);
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51 }
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52 if (succs.size() == 1) {
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53 next = succs.get(0);
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54 } else {
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55 return null;
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56 }
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57 }
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58 return (LoopBeginNode) next;
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59 }
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60
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61 /**
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62 * A call to this method must be placed immediately prior to the loop that is to be exploded.
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63 */
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64 @NodeIntrinsic
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65 public static native void explodeLoop();
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66 }