   0  int_signext %i0, $4 -> %i0
   4  int_signext %i1, $4 -> %i1
   8  residual_call_ir_i $<* fn ccall_dup2__INT_INT>, I[%i0, %i1], R[], <CallDescr(ii) EF=7> -> %i0
  17  -live- %i0
  20  int_return %i0
