8334060: Implementation of Late Barrier Expansion for G1
Co-authored-by: Roberto Castañeda Lozano <rcastanedalo@openjdk.org>
Co-authored-by: Erik Österlund <eosterlund@openjdk.org>
Co-authored-by: Siyao Liu <siyao.l.liu@oracle.com>
Co-authored-by: Kim Barrett <kbarrett@openjdk.org>
Co-authored-by: Amit Kumar <amitkumar@openjdk.org>
Co-authored-by: Martin Doerr <mdoerr@openjdk.org>
Co-authored-by: Feilong Jiang <fjiang@openjdk.org>
Co-authored-by: Sergey Nazarkin <snazarki@openjdk.org>
Reviewed-by: kvn, tschatzl, fyang, ayang, kbarrett
