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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/WhileNode.java @ 13336:d4c6dd07be76

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SL: added exemplary uses of new profiling utility BranchProfile to SL.
author Christian Humer <christian.humer@gmail.com>
date Sun, 15 Dec 2013 22:20:12 +0100
parents 5e3d1a68664e
children
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1 /*
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2 * Copyright (c) 2012, 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
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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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
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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12 * version 2 for more details (a copy is included in the LICENSE file that
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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13 * accompanied this code).
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14 *
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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15 * You should have received a copy of the GNU General Public License version
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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16 * 2 along with this work; if not, write to the Free Software Foundation,
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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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
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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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.truffle.sl.nodes;
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24
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25 import com.oracle.truffle.api.frame.*;
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26 import com.oracle.truffle.api.utilities.*;
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27
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28 public class WhileNode extends StatementNode {
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29
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30 @Child private ConditionNode condition;
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31
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32 @Child private StatementNode body;
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33
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34 private final BreakException breakTarget;
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35 private final ContinueException continueTarget;
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36
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37 private final BranchProfile continueMismatch = new BranchProfile();
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38 private final BranchProfile continueMatch = new BranchProfile();
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39 private final BranchProfile breakMismatch = new BranchProfile();
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40 private final BranchProfile breakMatch = new BranchProfile();
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41
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42 public WhileNode(ConditionNode condition, StatementNode body) {
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43 this.condition = adoptChild(condition);
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44 this.body = adoptChild(body);
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45
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46 this.breakTarget = new BreakException();
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47 this.continueTarget = new ContinueException();
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48 }
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49
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50 @Override
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51 public void executeVoid(VirtualFrame frame) {
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52 try {
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53 while (condition.executeCondition(frame)) {
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54 try {
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55 body.executeVoid(frame);
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56 } catch (ContinueException ex) {
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57 if (ex != continueTarget) {
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58 continueMismatch.enter();
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59 throw ex;
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60 }
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61 continueMatch.enter();
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62 // Fall through to next loop iteration.
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63 }
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64 }
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65 } catch (BreakException ex) {
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66 if (ex != breakTarget) {
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67 breakMismatch.enter();
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68 throw ex;
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69 }
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70 breakMatch.enter();
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71 // Done executing this loop, exit method to execute statement following the loop.
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72 }
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73 }
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74 }