--- /dev/null	2017-11-16 08:17:56.803999947 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/nodes/ZeroMemoryNode.java	2019-05-04 02:43:41.236100767 +0200
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2019, 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.replacements.nodes;
+
+import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8;
+import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_8;
+
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.nodeinfo.InputType;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.ValueNode;
+import org.graalvm.compiler.nodes.memory.FixedAccessNode;
+import org.graalvm.compiler.nodes.memory.address.AddressNode;
+import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;
+import org.graalvm.compiler.nodes.spi.LIRLowerable;
+import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
+import org.graalvm.compiler.word.Word;
+import jdk.internal.vm.compiler.word.LocationIdentity;
+
+/**
+ * Zeros a chunk of memory.
+ */
+@NodeInfo(nameTemplate = "ZeroMemory#{p#location/s}", allowedUsageTypes = {InputType.Memory}, cycles = CYCLES_8, size = SIZE_8)
+public class ZeroMemoryNode extends FixedAccessNode implements LIRLowerable {
+    public static final NodeClass<ZeroMemoryNode> TYPE = NodeClass.create(ZeroMemoryNode.class);
+
+    @Input ValueNode length;
+
+    public ZeroMemoryNode(ValueNode address, ValueNode length, LocationIdentity locationIdentity) {
+        this(OffsetAddressNode.create(address), length, locationIdentity, BarrierType.NONE);
+    }
+
+    public ZeroMemoryNode(AddressNode address, ValueNode length, LocationIdentity locationIdentity, BarrierType type) {
+        super(TYPE, address, locationIdentity, StampFactory.forVoid(), type);
+        this.length = length;
+    }
+
+    @Override
+    public void generate(NodeLIRBuilderTool gen) {
+        gen.getLIRGeneratorTool().getArithmetic().emitZeroMemory(gen.operand(getAddress()), gen.operand(length));
+    }
+
+    @Override
+    public boolean canNullCheck() {
+        return false;
+    }
+
+    @NodeIntrinsic
+    public static native void zero(Word address, long length, @ConstantNodeParameter LocationIdentity locationIdentity);
+}