Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/DirectCallNode.java @ 15436:ab90641473a6
Merge.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Tue, 29 Apr 2014 17:44:31 +0200 |
parents | graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/CallNode.java@70e4316c5785 graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/CallNode.java@5634b199c4da |
children | e3dd05527c2f |
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/* * Copyright (c) 2012, 2013, 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.*; import com.oracle.truffle.api.frame.*; /** * Represents a direct call to a {@link CallTarget}. Direct calls are calls for which the * {@link CallTarget} remains the same for each consecutive call. This part of the Truffle API * enables the runtime system to perform additional optimizations on direct calls. * * Optimizations that can be applied to a {@link DirectCallNode} are inlining and splitting. * Inlining inlines this call site into the call graph of the parent {@link CallTarget}. Splitting * duplicates the {@link CallTarget} using {@link RootNode#split()} to collect call site sensitive * profiling information. * * Please note: This class is not intended to be subclassed by guest language implementations. * * @see IndirectCallNode for calls with a non-constant target * @see TruffleRuntime#createDirectCallNode(CallTarget) * @see #forceInlining() * @see #split() */ public abstract class DirectCallNode extends Node { protected final CallTarget callTarget; protected DirectCallNode(CallTarget callTarget) { this.callTarget = callTarget; } /** * Calls the inner {@link CallTarget} returned by {@link #getCurrentCallTarget()}. * * @param arguments the arguments that should be passed to the callee * @return the return result of the call */ public abstract Object call(VirtualFrame frame, Object[] arguments); /** * Returns the originally supplied {@link CallTarget} when this call node was created. Please * note that the returned {@link CallTarget} is not necessarily the {@link CallTarget} that is * called. For that use {@link #getCurrentCallTarget()} instead. * * @return the {@link CallTarget} provided. */ public CallTarget getCallTarget() { return callTarget; } /** * Returns <code>true</code> if the underlying runtime system supports inlining for the * {@link CallTarget} in this {@link DirectCallNode}. * * @return true if inlining is supported. */ public abstract boolean isInlinable(); /** * Returns <code>true</code> if the {@link CallTarget} is forced to be inlined. A * {@link DirectCallNode} can either be inlined manually by invoking {@link #forceInlining()} or * by the runtime system which may at any point decide to inline. * * @return true if this method was inlined else false. */ public abstract boolean isInliningForced(); /** * Enforces the runtime system to inline the {@link CallTarget} at this call site. If the * runtime system does not support inlining or it is already inlined this method has no effect. * The runtime system may decide to not inline calls which were forced to inline. */ public abstract void forceInlining(); /** * Returns true if the runtime system has decided to inline this call-site. If the * {@link DirectCallNode} was forced to inline then this does not necessarily mean that the * {@link DirectCallNode} is really going to be inlined. This depends on whether or not the * runtime system supports inlining. The runtime system may also decide to not inline calls * which were forced to inline. */ public abstract boolean isInlined(); /** * Returns <code>true</code> if this {@link DirectCallNode} can be split. A * {@link DirectCallNode} can only be split if the runtime system supports splitting and if the * {@link RootNode} contained the {@link CallTarget} returns <code>true</code> for * {@link RootNode#isSplittable()}. * * @return <code>true</code> if the target can be split */ public abstract boolean isSplittable(); /** * Enforces the runtime system to split the {@link CallTarget}. If the {@link DirectCallNode} is * not splittable this methods has no effect. */ public abstract boolean split(); /** * Returns <code>true</code> if the target of the {@link DirectCallNode} was split. * * @return if the target was split */ public final boolean isSplit() { return getSplitCallTarget() != null; } /** * Returns the split {@link CallTarget} if this method is split. * * @return the split {@link CallTarget} */ public abstract CallTarget getSplitCallTarget(); /** * Returns the used call target when {@link #call(VirtualFrame, Object[])} is invoked. If the * {@link CallTarget} was split this method returns the {@link CallTarget} returned by * {@link #getSplitCallTarget()}. * * @return the used {@link CallTarget} when node is called */ public CallTarget getCurrentCallTarget() { CallTarget split = getSplitCallTarget(); if (split != null) { return split; } else { return getCallTarget(); } } /** * Returns the {@link RootNode} associated with {@link CallTarget} returned by * {@link #getCurrentCallTarget()}. If the stored {@link CallTarget} does not contain a * {@link RootNode} this method returns <code>null</code>. * * @see #getCurrentCallTarget() * @return the root node of the used call target */ public final RootNode getCurrentRootNode() { CallTarget target = getCurrentCallTarget(); if (target instanceof RootCallTarget) { return ((RootCallTarget) target).getRootNode(); } return null; } }