hg: jdk/sandbox: 8233439: G1 zero_filled optimization when committing CardCountsTable does not work

[chris.hegarty at oracle.com]

Changeset: 54401699cab1
Author:    sjohanss
Date:      2020-05-04 15:05 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/54401699cab1

8233439: G1 zero_filled optimization when committing CardCountsTable does not work
Reviewed-by: tschatzl, kbarrett

! src/hotspot/share/gc/g1/g1RegionToSpaceMapper.cpp
! src/hotspot/share/gc/g1/g1RegionToSpaceMapper.hpp