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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLExpressionNode.java @ 21116:bf8cbbfabdcf
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author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 24 Apr 2015 12:05:38 -0700 |
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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 * 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.truffle.sl.nodes; |
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24 |
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25 import com.oracle.truffle.api.dsl.*; |
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26 import com.oracle.truffle.api.frame.*; |
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27 import com.oracle.truffle.api.instrument.ProbeNode.WrapperNode; |
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28 import com.oracle.truffle.api.nodes.*; |
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29 import com.oracle.truffle.api.source.*; |
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30 import com.oracle.truffle.sl.nodes.instrument.*; |
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31 import com.oracle.truffle.sl.runtime.*; |
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32 |
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33 /** |
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34 * Base class for all SL nodes that produce a value and therefore benefit from type specialization. |
14906 | 35 * The annotation {@link TypeSystemReference} specifies the SL types. Specifying it here defines the |
36 * type system for all subclasses. | |
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37 */ |
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38 @TypeSystemReference(SLTypes.class) |
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39 @NodeInfo(description = "The abstract base node for all expressions") |
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40 public abstract class SLExpressionNode extends SLStatementNode { |
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41 |
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42 public SLExpressionNode(SourceSection src) { |
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43 super(src); |
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44 } |
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45 |
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46 /** |
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47 * The execute method when no specialization is possible. This is the most general case, |
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48 * therefore it must be provided by all subclasses. |
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49 */ |
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50 public abstract Object executeGeneric(VirtualFrame frame); |
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51 |
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52 /** |
14906 | 53 * When we use an expression at places where a {@link SLStatementNode statement} is already |
54 * sufficient, the return value is just discarded. | |
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55 */ |
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56 @Override |
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57 public void executeVoid(VirtualFrame frame) { |
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58 executeGeneric(frame); |
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59 } |
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60 |
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61 /* |
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62 * Execute methods for specialized types. They all follow the same pattern: they call the |
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63 * generic execution method and then expect a result of their return type. Type-specialized |
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64 * subclasses overwrite the appropriate methods. |
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65 */ |
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66 |
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67 public long executeLong(VirtualFrame frame) throws UnexpectedResultException { |
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68 return SLTypesGen.expectLong(executeGeneric(frame)); |
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69 } |
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70 |
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71 public SLFunction executeFunction(VirtualFrame frame) throws UnexpectedResultException { |
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72 return SLTypesGen.expectSLFunction(executeGeneric(frame)); |
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73 } |
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74 |
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75 public boolean executeBoolean(VirtualFrame frame) throws UnexpectedResultException { |
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76 return SLTypesGen.expectBoolean(executeGeneric(frame)); |
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77 } |
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78 |
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79 @Override |
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80 public boolean isInstrumentable() { |
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81 return true; |
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82 } |
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83 |
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84 @Override |
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85 public WrapperNode createWrapperNode() { |
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86 return new SLExpressionWrapperNode(this); |
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87 } |
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88 |
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89 } |