RFR: JDK-8202016: Use obj+offset in interpreter array access

[Roman Kennke]

Am 07.05.2018 um 21:47 schrieb Roman Kennke:
> In the TemplateTable::aastore() and
> InterpreterMacroAssembler::load_resolved_reference_at_index(), the
> element address is flattened, and then passed to the BarrierSetAssembler
> for actual access. GCs like Shenandoah need the original obj though.
> 
> The proposed change replaces the flattening with base+index+disp
> addressing, and removes the shift and add computations. In the case of
> aastore, we need to re-fetch the rcx/index from the stack because it
> gets trashed on the way.
> 
> Testing: passed: hotspot/jtreg:tier1
> 
> Can I please get a review?
> Thanks, Roman
> 

The webrev is missing :-)
http://cr.openjdk.java.net/~rkennke/JDK-8202016/webrev.01/

Roman