RFR: remove loop strip mining and profiled loop predication from 9

[Aleksey Shipilev]

On 10/02/2017 12:01 PM, Roman Kennke wrote:
> Am 02.10.2017 um 11:55 schrieb Andrew Haley:
>> On 29/09/17 10:39, Roland Westrelin wrote:
>>> http://cr.openjdk.java.net/~roland/shenandoah/dropstripmining_9/webrev.00/
>> What's the concern here?  Stability, compatibility?
>>
> This is a non-Shenandoah-specific improvement. It should go via upstream and only land in a released
> Java if upstream also has it. (And gone through upstream review, testing, etc etc.) Otherwise it's
> an additional risk that we break stuff that is not broken in upstream. Right?

Yup. We also have experimental stuff like that in sh/jdk10 at most, for the interim time between our
own testing and upstreaming. sh/jdk8u and sh/jdk9 are backport (stable) repositories, and should not
have these experimental things. Loop strip mining was never backported to sh/jdk8u for this reason.
Now that sh/jdk9 is stabilizing, loop strip mining should be purged from sh/jdk9 too, which is what
Roland is doing in this change.

Thanks,
-Aleksey