--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/nodes/G1ReferentFieldReadBarrier.java	2019-03-09 03:58:17.417592941 +0100
+++ /dev/null	2017-11-16 08:17:56.803999947 +0100
@@ -1,59 +0,0 @@
-/*
- * Copyright (c) 2013, 2018, 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_64;
-import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_64;
-
-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_64, size = SIZE_64)
-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;
-    }
-}