src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/JDK9StringSubstitutions.java

rev 52509 : [mq]: graal2

*** 73,78 ****
--- 73,82 ----
       * Will be intrinsified with an {@link InvocationPlugin} to a {@link LoadFieldNode}.
       */
      public static native byte[] getValue(String s);
  
      public static native int getCoder(String s);
+ 
+     public static boolean isCompactString(String s) {
+         return getCoder(s) == 0;
+     }
  }