Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/phases/WriteBarrierAdditionPhase.java @ 10832:623accae20d1
Leave null check at original node when adding G1ReferentFieldReadBarrier.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 22 Jul 2013 10:46:26 +0200 |
parents | 761002c55728 |
children | 079513fc609e |
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/* * Copyright (c) 2013, 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.hotspot.phases; import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.HeapAccess.BarrierType; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.phases.*; public class WriteBarrierAdditionPhase extends Phase { public WriteBarrierAdditionPhase() { } @Override protected void run(StructuredGraph graph) { for (ReadNode node : graph.getNodes(ReadNode.class)) { addReadNodeBarriers(node, graph); } for (WriteNode node : graph.getNodes(WriteNode.class)) { addWriteNodeBarriers(node, graph); } for (CompareAndSwapNode node : graph.getNodes(CompareAndSwapNode.class)) { addCASBarriers(node, graph); } for (ArrayRangeWriteNode node : graph.getNodes(ArrayRangeWriteNode.class)) { if (node.isObjectArray()) { addArrayRangeBarriers(node, graph); } } } private static void addReadNodeBarriers(ReadNode node, StructuredGraph graph) { if (node.getBarrierType() == BarrierType.PRECISE) { assert useG1GC(); G1ReferentFieldReadBarrier barrier = graph.add(new G1ReferentFieldReadBarrier(node.object(), node, node.location(), false, false)); graph.addAfterFixed(node, barrier); } else { assert node.getBarrierType() == BarrierType.NONE : "Non precise read barrier has been attached to read node."; } } private static void addWriteNodeBarriers(WriteNode node, StructuredGraph graph) { BarrierType barrierType = node.getBarrierType(); if (barrierType == BarrierType.PRECISE) { if (useG1GC()) { if (node.isInitialized()) { G1PreWriteBarrier preBarrier = graph.add(new G1PreWriteBarrier(node.object(), null, node.location(), true, node.getNullCheck())); preBarrier.setDeoptimizationState(node.getDeoptimizationState()); node.setNullCheck(false); graph.addBeforeFixed(node, preBarrier); } graph.addAfterFixed(node, graph.add(new G1PostWriteBarrier(node.object(), node.value(), node.location(), true))); } else { graph.addAfterFixed(node, graph.add(new SerialWriteBarrier(node.object(), node.location(), true))); } } else if (barrierType == BarrierType.IMPRECISE) { if (useG1GC()) { G1PreWriteBarrier preBarrier = graph.add(new G1PreWriteBarrier(node.object(), null, node.location(), true, node.getNullCheck())); preBarrier.setDeoptimizationState(node.getDeoptimizationState()); node.setNullCheck(false); graph.addBeforeFixed(node, preBarrier); graph.addAfterFixed(node, graph.add(new G1PostWriteBarrier(node.object(), node.value(), node.location(), false))); } else { graph.addAfterFixed(node, graph.add(new SerialWriteBarrier(node.object(), node.location(), false))); } } else { assert barrierType == BarrierType.NONE; } } private static void addCASBarriers(CompareAndSwapNode node, StructuredGraph graph) { BarrierType barrierType = node.getBarrierType(); if (barrierType == BarrierType.PRECISE) { if (useG1GC()) { graph.addBeforeFixed(node, graph.add(new G1PreWriteBarrier(node.object(), node.expected(), node.getLocation(), false, false))); graph.addAfterFixed(node, graph.add(new G1PostWriteBarrier(node.object(), node.newValue(), node.getLocation(), true))); } else { graph.addAfterFixed(node, graph.add(new SerialWriteBarrier(node.object(), node.getLocation(), true))); } } else if (barrierType == BarrierType.IMPRECISE) { if (useG1GC()) { graph.addBeforeFixed(node, graph.add(new G1PreWriteBarrier(node.object(), node.expected(), node.getLocation(), false, false))); graph.addAfterFixed(node, graph.add(new G1PostWriteBarrier(node.object(), node.newValue(), node.getLocation(), false))); } else { graph.addAfterFixed(node, graph.add(new SerialWriteBarrier(node.object(), node.getLocation(), false))); } } else { assert barrierType == BarrierType.NONE; } } private static void addArrayRangeBarriers(ArrayRangeWriteNode node, StructuredGraph graph) { if (useG1GC()) { if (node.isInitialized()) { G1ArrayRangePreWriteBarrier g1ArrayRangePreWriteBarrier = graph.add(new G1ArrayRangePreWriteBarrier(node.getArray(), node.getIndex(), node.getLength())); graph.addBeforeFixed(node, g1ArrayRangePreWriteBarrier); } G1ArrayRangePostWriteBarrier g1ArrayRangePostWriteBarrier = graph.add(new G1ArrayRangePostWriteBarrier(node.getArray(), node.getIndex(), node.getLength())); graph.addAfterFixed(node, g1ArrayRangePostWriteBarrier); } else { SerialArrayRangeWriteBarrier serialArrayRangeWriteBarrier = graph.add(new SerialArrayRangeWriteBarrier(node.getArray(), node.getIndex(), node.getLength())); graph.addAfterFixed(node, serialArrayRangeWriteBarrier); } } }