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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/call/SLCallNode.java @ 13821:b16ec83edc73

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Documentation and more refactoring of Simple Language
author Christian Wimmer <christian.wimmer@oracle.com>
date Wed, 29 Jan 2014 20:45:43 -0800
parents 7c418666c6c9
children f9b934e1e172
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1 /*
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2 * Copyright (c) 2013, 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
71991b7a0f14 SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
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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.call;
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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.nodes.*;
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28 import com.oracle.truffle.sl.nodes.*;
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29 import com.oracle.truffle.sl.runtime.*;
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30
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31 /**
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32 * The node for a function call in SL. Since SL has first class functions, the {@link SLFunction
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33 * target function} can be computed by an {@link #functionNode arbitrary expression}. This node is
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34 * responsible for evaluating this expression, as well as evaluating the {@link #argumentNodes
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35 * arguments}. The actual call dispatch is then delegated to a chain of
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36 * {@link SLAbstractDispatchNode}s that form a polymorphic inline cache.
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37 */
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38 @NodeInfo(shortName = "call")
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39 public final class SLCallNode extends SLExpressionNode {
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40
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41 public static SLCallNode create(SLExpressionNode function, SLExpressionNode[] arguments) {
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42 return new SLCallNode(function, arguments, new SLUninitializedDispatchNode());
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43 }
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44
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45 @Child protected SLExpressionNode functionNode;
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46 @Children protected final SLExpressionNode[] argumentNodes;
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47 @Child protected SLAbstractDispatchNode dispatchNode;
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48
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49 private SLCallNode(SLExpressionNode functionNode, SLExpressionNode[] argumentNodes, SLAbstractDispatchNode dispatchNode) {
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50 this.functionNode = adoptChild(functionNode);
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51 this.argumentNodes = adoptChildren(argumentNodes);
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52 this.dispatchNode = adoptChild(dispatchNode);
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53 }
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54
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55 @Override
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56 @ExplodeLoop
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57 public Object executeGeneric(VirtualFrame frame) {
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58 SLFunction function = evaluateFunction(frame);
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59
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60 Object[] argumentValues = new Object[argumentNodes.length];
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61 for (int i = 0; i < argumentNodes.length; i++) {
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62 argumentValues[i] = argumentNodes[i].executeGeneric(frame);
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63 }
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64 SLArguments arguments = new SLArguments(argumentValues);
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65
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66 return dispatchNode.executeDispatch(frame, function, arguments);
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67 }
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68
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69 private SLFunction evaluateFunction(VirtualFrame frame) {
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70 try {
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71 /*
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72 * The function node must evaluate to a SLFunction value, so we call
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73 * function-specialized method.
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74 */
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75 return functionNode.executeFunction(frame);
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76 } catch (UnexpectedResultException ex) {
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77 /*
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78 * The function node evaluated to a non-function result. This is a type error in the SL
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79 * program. We report it with the same exception that Truffle DSL generated nodes use to
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80 * report type errors.
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81 */
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82 throw new UnsupportedSpecializationException(this, ex.getResult());
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83 }
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84 }
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85 }