In the 09-May-2015 merge of hs main into the hs-rt brought following change to test/compiler/testlibrary/rtm/predicate/SupportedCPU.java:

--- a/test/compiler/testlibrary/rtm/predicate/SupportedCPU.java Tue May 05 16:09:30 2015 -0400
+++ b/test/compiler/testlibrary/rtm/predicate/SupportedCPU.java Fri May 08 13:25:11 2015 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 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
@@ -28,9 +28,12 @@
 
 import java.util.function.BooleanSupplier;
 
+import com.oracle.java.testlibrary.Platform;
+
 public class SupportedCPU implements BooleanSupplier {
     @Override
     public boolean getAsBoolean() {
+ if (Platform.isPPC()) { return CPUInfo.hasFeature("tcheck"); }
         return CPUInfo.hasFeature("rtm");
     }
 }

com.oracle.java.testlibrary does not exist after http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/ed6389f70257 (8067013: Rename the com.oracle.java.testlibary package).