RFR: Eliminate extra forwarding pointer per object

[Aleksey Shipilev]

On 5/8/19 5:03 PM, Roman Kennke wrote:
> http://cr.openjdk.java.net/~rkennke/eliminate-fwdptr/webrev.03/

Looks good. I think it is good to go to sh/jdk, and we would follow-up on any subsequent issues later.

Minor nit in shenandoahHeap.inline.hpp, need to fix indent a bit:

 445     assert (cs >= tams,  "only objects past TAMS here: "   PTR_FORMAT " (" PTR_FORMAT ")",
p2i(cs), p2i(tams));
 446     assert (cs < limit, "only objects below limit here: " PTR_FORMAT " (" PTR_FORMAT ")",
p2i(cs), p2i(limit));

-Aleksey