Re-check when remaining barrier support is in place

gc/z/TestUncommit.java :

Internal Error (open/src/hotspot/share/gc/z/zBarrier.cpp:48), pid=31926, tid=32018
assert(ZAddress::is_marked(addr)) failed: Should be marked

gc/z/TestHighUsage.java :

# Internal Error (open/src/hotspot/cpu/x86/macroAssembler_x86.cpp:894), pid=23585, tid=23586
# fatal error: DEBUG MESSAGE: Verify oop store failed
#