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annotate truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLExpressionNode.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 503529c65456
children 20380d1d41f2
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1 /*
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2 * Copyright (c) 2012, 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 * The Universal Permissive License (UPL), Version 1.0
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6 *
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7 * Subject to the condition set forth below, permission is hereby granted to any
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8 * person obtaining a copy of this software, associated documentation and/or
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9 * data (collectively the "Software"), free of charge and under any and all
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10 * copyright rights in the Software, and any and all patent rights owned or
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11 * freely licensable by each licensor hereunder covering either (i) the
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12 * unmodified Software as contributed to or provided by such licensor, or (ii)
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13 * the Larger Works (as defined below), to deal in both
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14 *
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15 * (a) the Software, and
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16 *
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17 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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18 * one is included with the Software each a "Larger Work" to which the Software
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19 * is contributed by such licensors),
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20 *
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21 * without restriction, including without limitation the rights to copy, create
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22 * derivative works of, display, perform, and distribute the Software and make,
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23 * use, sell, offer for sale, import, export, have made, and have sold the
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24 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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25 * either these or other terms.
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26 *
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27 * This license is subject to the following condition:
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28 *
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29 * The above copyright notice and either this complete permission notice or at a
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30 * minimum a reference to the UPL must be included in all copies or substantial
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31 * portions of the Software.
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32 *
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33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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34 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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35 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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36 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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37 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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38 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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39 * SOFTWARE.
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40 */
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41 package com.oracle.truffle.sl.nodes;
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42
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43 import com.oracle.truffle.api.dsl.TypeSystemReference;
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44 import com.oracle.truffle.api.frame.VirtualFrame;
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45 import com.oracle.truffle.api.instrument.ProbeNode.WrapperNode;
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46 import com.oracle.truffle.api.nodes.NodeInfo;
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47 import com.oracle.truffle.api.nodes.UnexpectedResultException;
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48 import com.oracle.truffle.api.source.SourceSection;
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49 import com.oracle.truffle.sl.nodes.instrument.SLExpressionWrapperNode;
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50 import com.oracle.truffle.sl.runtime.SLFunction;
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51
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52 /**
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53 * Base class for all SL nodes that produce a value and therefore benefit from type specialization.
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54 * The annotation {@link TypeSystemReference} specifies the SL types. Specifying it here defines the
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55 * type system for all subclasses.
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56 */
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57 @TypeSystemReference(SLTypes.class)
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58 @NodeInfo(description = "The abstract base node for all expressions")
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59 public abstract class SLExpressionNode extends SLStatementNode {
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60
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61 public SLExpressionNode(SourceSection src) {
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62 super(src);
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63 }
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64
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65 /**
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66 * The execute method when no specialization is possible. This is the most general case,
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67 * therefore it must be provided by all subclasses.
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68 */
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69 public abstract Object executeGeneric(VirtualFrame frame);
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70
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71 /**
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72 * When we use an expression at places where a {@link SLStatementNode statement} is already
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73 * sufficient, the return value is just discarded.
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74 */
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75 @Override
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76 public void executeVoid(VirtualFrame frame) {
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77 executeGeneric(frame);
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78 }
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79
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80 /*
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81 * Execute methods for specialized types. They all follow the same pattern: they call the
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82 * generic execution method and then expect a result of their return type. Type-specialized
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83 * subclasses overwrite the appropriate methods.
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84 */
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85
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86 public long executeLong(VirtualFrame frame) throws UnexpectedResultException {
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87 return SLTypesGen.expectLong(executeGeneric(frame));
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88 }
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89
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90 public SLFunction executeFunction(VirtualFrame frame) throws UnexpectedResultException {
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91 return SLTypesGen.expectSLFunction(executeGeneric(frame));
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92 }
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93
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94 public boolean executeBoolean(VirtualFrame frame) throws UnexpectedResultException {
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95 return SLTypesGen.expectBoolean(executeGeneric(frame));
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96 }
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97
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98 @Override
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99 public boolean isInstrumentable() {
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100 return true;
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101 }
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103 @Override
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104 public WrapperNode createWrapperNode() {
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105 return new SLExpressionWrapperNode(this);
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106 }
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107
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108 }