RFR: JDK-8211792: Fix misplaced BarrierSet forward declarations

[Roman Kennke]

> On 10/05/2018 11:46 PM, Roman Kennke wrote:
>> In templateTable.hpp there's a forward declaration for BarrierSet
>> missing, while in oop.hpp we have a gratituous one.
>>
>> Bug:
>> https://bugs.openjdk.java.net/browse/JDK-8211792
>> Webrev:
>> http://cr.openjdk.java.net/~rkennke/JDK-8211792/webrev.00/
> 
> Looks good to me.
> 
> Indeed, templateTable.hpp needs the declaration for:
>     97   static BarrierSet*     _bs;                    // Cache the barrier set.
> 
> ...and oop.hpp does not reference BarrierSet anywhere. The transitive dependencies that get
> BarrierSet from oop.hpp should really get BarrierSet explicitly. I have build Linux x86_64/fastdebug
> without PCH to make sure this does not happen now on common paths.

Thanks for reviewing, Aleksey!

jdk/submit came back with PASSED too. Ok to push it?


Roman