Increase execution counter for this function and potentially tier up to
the next JIT level. data is an offset to a structure recording
execution counts and the next-level JIT code corresponding to this
function. The increment values are currently 30 for
instrument-entry and 2 for
instrument-entry will also run the apply hook, if VM hooks are
Handle pending asynchronous interrupts (asyncs). See Asyncs. The
handle-interrupts instructions before any call,
return, or loop back-edge.
A special instruction to return from a call and also pop off the stack frame from the call. Used when returning from asynchronous interrupts.