RFR (S): [8] Cherry-pick fix for "8175887: C1 value numbering handling of Unsafe.get*Volatile is incorrect"

[Roman Kennke]

Am 21.04.2017 um 19:27 schrieb Aleksey Shipilev:
> On 04/19/2017 08:33 PM, Aleksey Shipilev wrote:
>> This allows shenandoah-8u to pass new jcstress.
>>
>> Let's cherry-pick into shenandoah-jdk8u, before it proliferates via 8u152. We
>> did this exercise in shenandoah-jdk9 already, and we got the actual changeset
>> via the merge there.
>>
>> https://bugs.openjdk.java.net/browse/JDK-8176451
>> http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/0e53cdb9fc2a
> Ok to push?
>
> Both Andrews would not like this one to proliferate upstream from us, but we
> need it to pass jcstress.

Ok