Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeCost.java @ 18243:b363053f6cac
Add missing import.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 01 Jul 2014 21:44:57 +0200 |
parents | 6681b9eb3f4c |
children | fe5d4383b505 |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.api.nodes; import com.oracle.truffle.api.*; /** * Represents a rough estimate for the cost of a {@link Node}. This estimate can be used by runtime * systems or guest languages to implement heuristics based on Truffle ASTs. * * @see Node#getCost() */ public enum NodeCost { /** * This node has literally no costs and should be ignored for heuristics. This is particularly * useful for wrapper and profiling nodes which should not influence the heuristics. */ NONE, /** * This node has a {@link CompilerDirectives#transferToInterpreter()} or * {@link CompilerDirectives#transferToInterpreterAndInvalidate()} as its first unconditional * statement. */ UNINITIALIZED, /** * This node represents a specialized monomorphic version of an operation. */ MONOMORPHIC, /** * This node represents a polymorphic version of an operation. For multiple chained polymorphic * nodes the first may return {@link #MONOMORPHIC} and all addtional nodes should return * {@link #POLYMORPHIC}. */ POLYMORPHIC, /** * This node represents a megamorphic version of an operation. This value should only be used if * the operation implementation supports monomorphism and polymorphism otherwise * {@link #MONOMORPHIC} should be used instead. */ MEGAMORPHIC; }