RFR 8049105: Move array component mirror to instance of java/lang/Class (hotspot part 2)

[Mikael Gerdin]

Coleen,

On 08/26/2014 03:56 PM, Coleen Phillimore wrote:
> Summary: This removes component mirrors from arrayKlass metadata and the
> C2 intrinsic for them.
>
> I'm sending this out to hotspot-dev so I can get someone from the
> compiler to review this (again).  Chris Thalinger, you already saw this
> once, it's the same thing, but I had to hold this change until it was
> okay'd by licensees.   Can you re-review?
>
> Also GC team note that Klass::oops_do() is now non-virtual.  Will that
> help?

It may. But the oops_do code is riddled with closures and indirect calls 
through callbacks so I don't think it will gain us any significant 
performance boost.

>
> Tested with jck, nsk and jtreg tests.  Also, ran refworkload with no
> difference in performance.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8049105/

Looks good to me too.
/Mikael

> bug link https://bugs.openjdk.java.net/browse/JDK-8049105
>
> Thanks,
> Coleen