--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/nodes/MonitorCounterNode.java	Thu Oct 17 20:27:44 2019 +0100
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/nodes/MonitorCounterNode.java	Thu Oct 17 20:53:35 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 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
@@ -26,8 +26,6 @@
 
 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
 
-import java.util.BitSet;
-
 import org.graalvm.compiler.core.common.type.StampFactory;
 import org.graalvm.compiler.graph.Node;
 import org.graalvm.compiler.graph.NodeClass;
@@ -56,7 +54,7 @@
     @Override
     public void generate(NodeLIRBuilderTool gen) {
         assert graph().getNodes().filter(MonitorCounterNode.class).count() == 1 : "monitor counters not canonicalized to single instance";
-        VirtualStackSlot counter = gen.getLIRGeneratorTool().getResult().getFrameMapBuilder().allocateStackSlots(1, new BitSet(0), null);
+        VirtualStackSlot counter = gen.getLIRGeneratorTool().getResult().getFrameMapBuilder().allocateStackSlots(1);
         Value result = gen.getLIRGeneratorTool().emitAddress(counter);
         gen.setResult(this, result);
     }