| /* |
| * Copyright (c) 2013, 2015, 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 org.graalvm.compiler.hotspot.nodes; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_50; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_50; |
| |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.memory.address.AddressNode; |
| |
| /** |
| * The {@code G1ReferentFieldReadBarrier} is added when a read access is performed to the referent |
| * field of a {@link java.lang.ref.Reference} object (through a {@code LoadFieldNode} or an |
| * {@code UnsafeLoadNode}). The return value of the read is passed to the snippet implementing the |
| * read barrier and consequently is added to the SATB queue if the concurrent marker is enabled. |
| */ |
| @NodeInfo(cycles = CYCLES_50, size = SIZE_50) |
| public final class G1ReferentFieldReadBarrier extends ObjectWriteBarrier { |
| public static final NodeClass<G1ReferentFieldReadBarrier> TYPE = NodeClass.create(G1ReferentFieldReadBarrier.class); |
| |
| protected final boolean doLoad; |
| |
| public G1ReferentFieldReadBarrier(AddressNode address, ValueNode expectedObject, boolean doLoad) { |
| super(TYPE, address, expectedObject, true); |
| this.doLoad = doLoad; |
| } |
| |
| public ValueNode getExpectedObject() { |
| return getValue(); |
| } |
| |
| public boolean doLoad() { |
| return doLoad; |
| } |
| } |
