RFR: Upstream merge 2018-06-01

[Aleksey Shipilev]

On 06/01/2018 11:50 AM, Roman Kennke wrote:
> Let's pull upstream changes up to:
> 
> changeset:   50225:a09af8ef8e5c
> user:        roland
> date:        Thu Apr 26 12:48:35 2018 -0700
> summary:     8201367: assert(current != first_mem) failed: corrupted
> memory graph in superword code
> 
> After that comes the C1 barriers modularization, and I'm going to take
> this as single piece.
> 
> There've been a few trivial conflicts, but nothing in Shenandoah.
> 
> List of changes:
> http://cr.openjdk.java.net/~rkennke/upstream-merge-2018-06-01/outgoing.txt
> 
> 
> Testing: hotspot_gc_shenandoah looks good.
> 
> Ok?

OK.

-Aleksey