Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/DirectCallNode.java @ 21586:6da76343d830
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 29 May 2015 12:09:07 +0200 |
parents | 57f3498a51a4 |
children |
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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 call site * sensitive AST duplication. Inlining inlines this call site into the call graph of the parent * {@link CallTarget}. Call site sensitive AST duplication duplicates the {@link CallTarget} in an * uninitialized state 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 #cloneCallTarget() */ 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. * * @deprecated we do not expose this information any longer. returns always false. */ @SuppressWarnings("static-method") @Deprecated public final boolean isInlined() { return false; } /** * Returns <code>true</code> if the runtime system supports cloning and the {@link RootNode} * returns <code>true</code> in {@link RootNode#isCloningAllowed()}. * * @return <code>true</code> if the target is allowed to be cloned. */ public abstract boolean isCallTargetCloningAllowed(); /** * Clones the {@link CallTarget} instance returned by {@link #getCallTarget()} in an * uninitialized state for this {@link DirectCallNode}. This can be sensible to gather call site * sensitive profiling information for this {@link DirectCallNode}. If * {@link #isCallTargetCloningAllowed()} returns <code>false</code> this method has no effect * and returns <code>false</code>. */ public abstract boolean cloneCallTarget(); /** * Returns <code>true</code> if the target of the {@link DirectCallNode} was cloned by the * runtime system or by the guest language implementation. * * @return if the target was split */ public final boolean isCallTargetCloned() { return getClonedCallTarget() != null; } /** * Returns the split {@link CallTarget} if this call site's {@link CallTarget} is cloned. * * @return the split {@link CallTarget} */ public abstract CallTarget getClonedCallTarget(); /** * 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 #getClonedCallTarget()}. * * @return the used {@link CallTarget} when node is called */ public CallTarget getCurrentCallTarget() { CallTarget split = getClonedCallTarget(); 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; } @Override public String toString() { return String.format("%s(target=%s)", getClass().getSimpleName(), getCurrentCallTarget()); } public static DirectCallNode create(CallTarget target) { return Truffle.getRuntime().createDirectCallNode(target); } }