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view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/CallNode.java @ 14816:836d558c3a5f
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author | Josef Eisl <josef.eisl@jku.at> |
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date | Wed, 19 Mar 2014 15:14:37 +0100 |
parents | cd4595e8a685 |
children | 9c01fabfb167 |
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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.*; /** * This node represents a call to a static {@link CallTarget}. This node should be used whenever a * {@link CallTarget} is considered constant at a certain location in the tree. This enables the * Truffle runtime to perform inlining or other optimizations for this call-site. This class is * intended to be implemented by truffle runtime implementors and not by guest language * implementors. * * @see #create(CallTarget) to create a CallNode instance. */ public abstract class CallNode extends Node { protected final CallTarget callTarget; protected CallNode(CallTarget callTarget) { this.callTarget = callTarget; } /** * Calls this constant target passing a caller frame and arguments. * * @param caller the caller frame * @param arguments the arguments that should be passed to the callee * @return the return result of the call */ public abstract Object call(PackedFrame caller, Arguments 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; } /** * @return true if this {@link CallNode} was already inlined. */ public abstract boolean isInlined(); public abstract void inline(); public abstract boolean isSplittable(); public abstract boolean split(); public final boolean isSplit() { return getSplitCallTarget() != null; } public abstract CallTarget getSplitCallTarget(); /** * Returns the used call target when {@link #call(PackedFrame, Arguments)} is invoked. If the * {@link CallNode} was split this method returns the {@link CallTarget} returned by * {@link #getSplitCallTarget()}. If not split this method returns the original supplied * {@link CallTarget}. * * @return the used {@link CallTarget} when node is called */ public CallTarget getCurrentCallTarget() { CallTarget split = getSplitCallTarget(); if (split != null) { return split; } else { return getCallTarget(); } } @Override protected void onReplace(Node newNode, String reason) { super.onReplace(newNode, reason); /* * Old call nodes are removed in the old target root node. */ CallNode oldCall = this; RootNode oldRoot = getCurrentRootNode(); if (oldRoot != null) { oldRoot.removeCachedCallNode(oldCall); } registerCallTarget((CallNode) newNode); } protected static final void registerCallTarget(CallNode newNode) { RootNode newRoot = newNode.getCurrentRootNode(); if (newRoot != null) { newRoot.addCachedCallNode(newNode); } } protected void notifyCallNodeAdded() { } /** * Returns the {@link RootNode} associated with {@link CallTarget} returned by * {@link #getCurrentCallTarget()}. * * @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; } /** * @deprecated always returns <code>true</code> now. */ @Deprecated public boolean isInlinable() { return true; } /** * @deprecated instead use {@link #getCurrentRootNode()} and check for {@link #isInlined()} for * true. */ @Deprecated public RootNode getInlinedRoot() { if (!isInlined()) { return null; } return getCurrentRootNode(); } /** * @deprecated use {@link TruffleRuntime#createCallNode(CallTarget)} instead */ @Deprecated public static CallNode create(CallTarget target) { return Truffle.getRuntime().createCallNode(target); } }