: spill-at-sync-point? ( sync-point live-interval -- ? )
{
[ drop keep-dst?>> not ]
- [ [ n>> ] dip find-use dup [ def-rep>> ] when not ]
+ [ [ n>> ] dip find-use [ def-rep>> ] ?call not ]
} 2|| ;
: spill-at-sync-point ( sync-point live-interval -- ? )