RFR 8191987: TLAB Refills for PPC64

[JC Beyler]

Please see the updated webrev :)


WebRev: http://cr.openjdk.java.net/~jcbeyler/8191987/webrev.03/

On Wed, Dec 20, 2017 at 12:30 PM, JC Beyler <jcbeyler at google.com> wrote:
> Hi all,
>
> The TLAB and the inline contiguous allocations handling are different
> for each architecture. On certain architectures, TLAB is never
> actually never refilled (ref:
> https://bugs.openjdk.java.net/browse/JDK-8190862).
>
> The PPC patch really only removes the code that augments the TLAB
> waste limit since that is already done in the common code slow path.
>
> Due to a double jump, there is an additional change to have code from
> SkipIfEqualZero available so that we don't have to manually generate
> that code in the template code.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8191987
> WebRev: http://cr.openjdk.java.net/~rasbold/8191987/webrev.03/
>
> Let me know what you think and if someone could test/verify it, that
> would be great.
>
> Thanks for your help,
> Jc