Function dr_insert_it_instrs 

pub unsafe extern "C" fn dr_insert_it_instrs(
    drcontext: *mut c_void,
    ilist: *mut instrlist_t,
) -> c_int

Inserts enough OP_it instructions with proper parameters into \p ilist to make all predicated instructions in \p ilist legal in Thumb mode (#DR_ISA_ARM_THUMB). Treats predicated app and tool instructions identically, but marks inserted OP_it instructions as app instructions (see instr_set_app()).

\return the number of OP_it instructions inserted; -1 on error.

\note ARM-only