hg: jdk9/hs-rt/hotspot: 8129558: Coalesce dead objects during removal of self-forwarded pointers

[thomas.schatzl at oracle.com]

Changeset: 9690cc21ec74
Author:    tschatzl
Date:      2015-07-07 14:20 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/9690cc21ec74

8129558: Coalesce dead objects during removal of self-forwarded pointers
Summary: To improve performance of self-forwarding fixup during evacuation failure, coalesce the work done for dead objects.
Reviewed-by: mgerdin, tbenson, tonyp

! src/share/vm/gc/g1/g1CollectedHeap.cpp
! src/share/vm/gc/g1/g1EvacFailure.cpp
! src/share/vm/gc/g1/g1EvacFailure.hpp