diff -r 6b6bf0de534b -r d068b1e534de src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot.aarch64/src/jdk/vm/ci/hotspot/aarch64/AArch64HotSpotJVMCIBackendFactory.java
--- a/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot.aarch64/src/jdk/vm/ci/hotspot/aarch64/AArch64HotSpotJVMCIBackendFactory.java	Wed Oct 16 14:50:53 2019 +0100
+++ b/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot.aarch64/src/jdk/vm/ci/hotspot/aarch64/AArch64HotSpotJVMCIBackendFactory.java	Wed Oct 16 16:54:56 2019 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 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
@@ -127,8 +127,8 @@
         return new HotSpotConstantReflectionProvider(runtime);
     }
 
-    private static RegisterConfig createRegisterConfig(AArch64HotSpotVMConfig config, TargetDescription target) {
-        return new AArch64HotSpotRegisterConfig(target, config.useCompressedOops);
+    private static RegisterConfig createRegisterConfig(TargetDescription target) {
+        return new AArch64HotSpotRegisterConfig(target);
     }
 
     protected HotSpotCodeCacheProvider createCodeCache(HotSpotJVMCIRuntime runtime, TargetDescription target, RegisterConfig regConfig) {
@@ -167,7 +167,7 @@
                 metaAccess = createMetaAccess(runtime);
             }
             try (InitTimer rt = timer("create RegisterConfig")) {
-                regConfig = createRegisterConfig(config, target);
+                regConfig = createRegisterConfig(target);
             }
             try (InitTimer rt = timer("create CodeCache provider")) {
                 codeCache = createCodeCache(runtime, target, regConfig);