s390x: Implement Ist_MBE
VEX IR provides the statement Ist_MBE which is used to implement memory
barriers (Imbe_Fence). We use this statement to implement serialization which
is similar.
Fixes #271385.  (Florian Krohm, britzel@acm.org)



git-svn-id: svn://svn.valgrind.org/vex/trunk@2134 8f6e269a-dfd6-0310-a8e1-e2731360e62c
4 files changed