RFR: fix loop unswitching with -XX:-ShenandoahWriteBarrierMemBar

[Aleksey Shipilev]

On 01/31/2018 05:04 PM, Roland Westrelin wrote:
>> Do we care anywhere else about deeper chain from that iff to the actual load? I.e. no other code is
>> broken due to the new graph shape?
> 
> Not as far as can tell.

All good then.

-Aleksey