RFR (XS): Enable UseCountedLoopSafepoints with Shenandoah

[Lennart Börjeson]

> 20 dec. 2016 kl. 16:26 skrev Aleksey Shipilev <shade at redhat.com>:
> 
> I am a bit confused about the notion of "standard behavior". There is no
> standard that mandates either putting safepoint checks into loops, or skipping them.
> 
> This Shenandoah change _inserts_ more safepoint checks, not eliminates them, so
> this seems like something you want?
> 

I was thinking about the flag UseCountedLoopSafepoints. The current default is ”false”, and I gathered you were discussing to change this to ”true”?