6914402: G1: assert(!is_young_card(cached_ptr),"shouldn't get a card in young region") Summary: Invalid assert. Filter cards evicted from the card count cache instead. Reviewed-by: apetrusenko, tonyp

6904516: More object array barrier fixes, following up on 6906727 Summary: Fixed missing pre-barrier calls for G1, modified C1 to call pre- and correct post-barrier interfaces, deleted obsolete interface, (temporarily) disabled redundant deferred barrier in BacktraceBuilder. Reviewed-by: coleenp, jmasa, kvn, never