RFR (XS): Native Brooks ptr accesses can be constant-folded

[Roman Kennke]

Am Dienstag, den 25.10.2016, 17:22 +0200 schrieb Aleksey Shipilev:
> Hi,
> 
> When I did the bugfix for 16-byte object alignments, I had to make
> the
> byte/word offsets non-constant and agreeing with allocated sizes --
> otherwise we were crashing with reading garbage. But now I see there
> is
> a little inconsistency in C2 that bumps the size based on offset, not
> the size. When we fix that, we can get our constant offsets back!
> Native
> disassembly for, say, ShenandoahBarrierSet::obj_equals looks much
> better
> now.
> 
> Webrev:
>   http://cr.openjdk.java.net/~shade/shenandoah/brooks-cnst-fold/webre
> v.01/
> 
> Testing:
>  hs_gc_shenandoah (fastdebug)

Ok!

Roman