8206163: AArch64: incorrect code generation for StoreCM Summary: StoreCM may require planting a StoreStore barrier Reviewed-by: aph, zyao, roland

8205426: Humongous continues remembered set does not match humongous start region one after Remark Summary: Remembered set states for humongous objects crossing an internal per-thread processing threshold could synchronized if the humongous continues regions were processed first. Reviewed-by: ehelin, kbarrett