swift234

now that things are rearranged to our liking, introduce a new function
to handle stores that are either an assign or an init, depending on the
control flow leading to them.  This case needs to have a diamond inserted
in the CFG in the general case.  For now, we whitelist trivial types,
since init and assign are the same for them.  This fixes rdar://15530750
for trivial types.


Swift SVN r10684