Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLRootNode.java @ 14628:a08b8694f556
Truffle: Node API changes
deprecate adoptChild, no longer needed in constructor
add Node#insert for inserting new nodes into the tree (previously adoptChild)
add Node#adoptChildren() helper method that adopts all (direct and indirect) children of a node, automatically called in TruffleRuntime#createCallTarget
author | Andreas Woess <andreas.woess@jku.at> |
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date | Wed, 19 Mar 2014 23:11:46 +0100 |
parents | 5243fe9a3fbc |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
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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 com.oracle.truffle.api.frame.*; |
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26 import com.oracle.truffle.api.nodes.*; |
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27 import com.oracle.truffle.sl.builtins.*; |
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28 import com.oracle.truffle.sl.nodes.controlflow.*; |
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29 |
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30 /** |
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31 * The root of all SL execution trees. It is a Truffle requirement that the tree root extends the |
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32 * class {@link RootNode}. This class is used for both builtin and user-defined functions. For |
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33 * builtin functions, the {@link #bodyNode} is a subclass of {@link SLBuiltinNode}. For user-defined |
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34 * functions, the {@link #bodyNode} is a {@link SLFunctionBodyNode}. |
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35 */ |
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36 public final class SLRootNode extends RootNode { |
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37 |
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38 /** The function body that is executed, and specialized during execution. */ |
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39 @Child private SLExpressionNode bodyNode; |
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40 |
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41 /** |
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42 * A copy of the uninitialized body. When performing method inlining, it is beneficial to inline |
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43 * the unspecialized function body, so that it is specialized in the context of the caller. This |
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44 * makes the specializations of the inlined function more precise. |
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45 */ |
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46 private final SLExpressionNode uninitializedBodyNode; |
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47 |
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48 /** The name of the function, for printing purposes only. */ |
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49 private final String name; |
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50 |
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51 public SLRootNode(FrameDescriptor frameDescriptor, SLExpressionNode bodyNode, String name) { |
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52 super(null, frameDescriptor); |
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53 /* Deep copy the body before any specialization occurs during execution. */ |
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54 this.uninitializedBodyNode = NodeUtil.cloneNode(bodyNode); |
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55 this.bodyNode = bodyNode; |
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56 this.name = name; |
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57 } |
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58 |
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59 @Override |
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60 public Object execute(VirtualFrame frame) { |
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61 return bodyNode.executeGeneric(frame); |
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62 } |
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63 |
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64 @Override |
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65 public boolean isSplittable() { |
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66 return true; |
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67 } |
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68 |
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69 @Override |
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70 public RootNode split() { |
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71 return new SLRootNode(getFrameDescriptor().shallowCopy(), NodeUtil.cloneNode(uninitializedBodyNode), name); |
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72 } |
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73 |
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74 @Override |
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75 public String toString() { |
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76 return "root " + name; |
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77 } |
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78 } |