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view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.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 | dd2c23065f47 |
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 java.util.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; /** * A root node is a node with a method to execute it given only a frame as a parameter. Therefore, a * root node can be used to create a call target using * {@link TruffleRuntime#createCallTarget(RootNode)}. */ public abstract class RootNode extends Node { private CallTarget callTarget; private final FrameDescriptor frameDescriptor; /* * Internal set to keep back-references to the call-sites. */ private final Set<CallNode> cachedCallNodes = Collections.newSetFromMap(new WeakHashMap<CallNode, Boolean>()); protected RootNode() { this(null, null); } protected RootNode(SourceSection sourceSection) { this(sourceSection, null); } protected RootNode(SourceSection sourceSection, FrameDescriptor frameDescriptor) { super(sourceSection); if (frameDescriptor == null) { this.frameDescriptor = new FrameDescriptor(); } else { this.frameDescriptor = frameDescriptor; } } /** * @deprecated Not required anymore. Do not use. */ @Deprecated public RootNode inline() { if (!isInlinable()) { throw new UnsupportedOperationException("Inlining is not enabled."); } return split(); } /** * @deprecated Not required anymore. Do not use. */ @Deprecated public int getInlineNodeCount() { return 0; } /** * @deprecated Not required anymore. Do not use. */ @Deprecated public boolean isInlinable() { return true; } public RootNode split() { return NodeUtil.cloneNode(this); } public boolean isSplittable() { return false; } /** * Reports the execution count of a loop that is a child of this node. The optimization * heuristics can use the loop count to guide compilation and inlining. */ public void reportLoopCount(int count) { if (getCallTarget() instanceof LoopCountReceiver) { ((LoopCountReceiver) getCallTarget()).reportLoopCount(count); } } /** * Executes this function using the specified frame and returns the result value. * * @param frame the frame of the currently executing guest language method * @return the value of the execution */ public abstract Object execute(VirtualFrame frame); public CallTarget getCallTarget() { return callTarget; } public final FrameDescriptor getFrameDescriptor() { return frameDescriptor; } public final void setCallTarget(CallTarget callTarget) { this.callTarget = callTarget; } /* Internal API. Do not use. */ void addCachedCallNode(CallNode callSite) { this.cachedCallNodes.add(callSite); } /* Internal API. Do not use. */ void removeCachedCallNode(CallNode callSite) { this.cachedCallNodes.remove(callSite); } /** * Returns a {@link Set} of {@link CallNode} nodes which are created to invoke this RootNode. * This method does not make any guarantees to contain all the {@link CallNode} nodes that are * invoking this method. Due to its weak nature the elements returned by this method may change * with each consecutive call. * * @return a set of {@link CallNode} nodes */ public final Set<CallNode> getCachedCallNodes() { return Collections.unmodifiableSet(cachedCallNodes); } /** * @deprecated use {@link #getCachedCallNodes()} instead. */ @Deprecated public final CallNode getParentInlinedCall() { return cachedCallNodes.isEmpty() ? null : cachedCallNodes.iterator().next(); } }