Just see if every suspend call is followed only by safe instructions or
returns, then insert a suspension point check if there isn't a direct
return.
The first part of this is equivalent to the old implementation, just
refactored. The second part generates strictly more checks; see, for
example, the fixed test, in which the previous implementation failed to
insert a check before a CHECKCAST.
^KT-51818 Fixed
pyos
a07e21d913