Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/debug/WeakCounterNode.java @ 16919:0fe4732e5181
made use of generated Node classes predicated on value of graal.useGeneratedNodes system property (default is false)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 25 Aug 2014 13:45:12 +0200 |
parents | f90dcdbbb75e |
children | 845e881ce054 |
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/* * Copyright (c) 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. * * 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.graal.nodes.debug; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; /** * This is a special version of the dynamic counter node that removes itself as soon as it's the * only usage of the associated node. This way it only increments the counter if the node is * actually executed. */ @NodeInfo public class WeakCounterNode extends DynamicCounterNode implements Simplifiable, Virtualizable { @Input ValueNode checkedValue; public static WeakCounterNode create(String group, String name, ValueNode increment, boolean addContext, ValueNode checkedValue) { return USE_GENERATED_NODES ? new WeakCounterNodeGen(group, name, increment, addContext, checkedValue) : new WeakCounterNode(group, name, increment, addContext, checkedValue); } WeakCounterNode(String group, String name, ValueNode increment, boolean addContext, ValueNode checkedValue) { super(group, name, increment, addContext); this.checkedValue = checkedValue; } @Override public void simplify(SimplifierTool tool) { if (checkedValue instanceof FloatingNode && checkedValue.usages().count() == 1) { tool.addToWorkList(checkedValue); graph().removeFixed(this); } } @Override public void virtualize(VirtualizerTool tool) { State state = tool.getObjectState(checkedValue); if (state != null && state.getState() == EscapeState.Virtual) { tool.delete(); } } public static void addCounterBefore(String group, String name, long increment, boolean addContext, ValueNode checkedValue, FixedNode position) { StructuredGraph graph = position.graph(); WeakCounterNode counter = graph.add(WeakCounterNode.create(name, group, ConstantNode.forLong(increment, graph), addContext, checkedValue)); graph.addBeforeFixed(position, counter); } }