Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeCost.java @ 16464:76081918079d
Truffle: move TraceRewrites code to NodeUtil
author | Andreas Woess <andreas.woess@jku.at> |
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date | Thu, 10 Jul 2014 18:08:29 +0200 |
parents | 6681b9eb3f4c |
children | fe5d4383b505 |
rev | line source |
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Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
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1 /* |
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2 * Copyright (c) 2012, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.nodes; |
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26 |
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27 import com.oracle.truffle.api.*; |
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28 |
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29 /** |
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30 * Represents a rough estimate for the cost of a {@link Node}. This estimate can be used by runtime |
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31 * systems or guest languages to implement heuristics based on Truffle ASTs. |
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32 * |
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33 * @see Node#getCost() |
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34 */ |
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35 public enum NodeCost { |
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36 |
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37 /** |
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38 * This node has literally no costs and should be ignored for heuristics. This is particularly |
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39 * useful for wrapper and profiling nodes which should not influence the heuristics. |
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40 */ |
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41 NONE, |
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42 |
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43 /** |
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44 * This node has a {@link CompilerDirectives#transferToInterpreter()} or |
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45 * {@link CompilerDirectives#transferToInterpreterAndInvalidate()} as its first unconditional |
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46 * statement. |
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47 */ |
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48 UNINITIALIZED, |
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49 |
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50 /** |
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51 * This node represents a specialized monomorphic version of an operation. |
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52 */ |
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53 MONOMORPHIC, |
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54 |
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55 /** |
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56 * This node represents a polymorphic version of an operation. For multiple chained polymorphic |
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57 * nodes the first may return {@link #MONOMORPHIC} and all addtional nodes should return |
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58 * {@link #POLYMORPHIC}. |
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59 */ |
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60 POLYMORPHIC, |
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61 |
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62 /** |
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63 * This node represents a megamorphic version of an operation. This value should only be used if |
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64 * the operation implementation supports monomorphism and polymorphism otherwise |
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65 * {@link #MONOMORPHIC} should be used instead. |
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66 */ |
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67 MEGAMORPHIC; |
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68 |
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69 } |