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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLExpressionNode.java @ 13883:ff3136ecb5a7

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SL: small changes
author Christian Wimmer <christian.wimmer@oracle.com>
date Wed, 05 Feb 2014 03:16:21 -0800
parents b16ec83edc73
children f3a5036cc13c
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1 /*
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2 * Copyright (c) 2012, 2014, 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 java.math.*;
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26
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27 import com.oracle.truffle.api.dsl.*;
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28 import com.oracle.truffle.api.frame.*;
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29 import com.oracle.truffle.api.nodes.*;
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30 import com.oracle.truffle.sl.runtime.*;
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31
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32 /**
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33 * Base class for all SL nodes that produce a value and therefore benefit from type specialization.
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34 * The annotation {@Link TypeSystemReference} specifies the SL types. Specifying it here
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35 * defines the type system for all subclasses.
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36 */
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37 @TypeSystemReference(SLTypes.class)
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38 public abstract class SLExpressionNode extends SLStatementNode {
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39
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40 /**
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41 * The execute method when no specialization is possible. This is the most general case,
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42 * therefore it must be provided by all subclasses.
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43 */
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44 public abstract Object executeGeneric(VirtualFrame frame);
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45
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46 /**
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47 * When we use an expression at places where a {@SLStatmentNode statement} is
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48 * already sufficient, the return value is just discarded.
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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 executeGeneric(frame);
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53 }
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54
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55 /*
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56 * Execute methods for specialized types. They all follow the same pattern: they call the
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57 * generic execution method and then expect a result of their return type. Type-specialized
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58 * subclasses overwrite the appropriate methods.
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59 */
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60
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61 public long executeLong(VirtualFrame frame) throws UnexpectedResultException {
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62 return SLTypesGen.SLTYPES.expectLong(executeGeneric(frame));
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63 }
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64
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65 public BigInteger executeBigInteger(VirtualFrame frame) throws UnexpectedResultException {
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66 return SLTypesGen.SLTYPES.expectBigInteger(executeGeneric(frame));
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67 }
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68
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69 public boolean executeBoolean(VirtualFrame frame) throws UnexpectedResultException {
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70 return SLTypesGen.SLTYPES.expectBoolean(executeGeneric(frame));
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71 }
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72
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73 public String executeString(VirtualFrame frame) throws UnexpectedResultException {
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74 return SLTypesGen.SLTYPES.expectString(executeGeneric(frame));
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75 }
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76
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77 public SLFunction executeFunction(VirtualFrame frame) throws UnexpectedResultException {
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78 return SLTypesGen.SLTYPES.expectSLFunction(executeGeneric(frame));
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79 }
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80
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81 public SLNull executeNull(VirtualFrame frame) throws UnexpectedResultException {
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82 return SLTypesGen.SLTYPES.expectSLNull(executeGeneric(frame));
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83 }
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84 }