   0  residual_call_ir_i $<* fn ccall_ctermid__arrayPtr>, I[$<* None>], R[], <CallDescr(i) EF=7> -> %i0
   8  -live- %i0
   8  residual_call_ir_r $<* fn charp2str>, I[%i0], R[], <CallDescr(i) EF=5> -> %r0
  16  -live- %r0
  16  -live- %r0
  16  goto_if_not_ptr_iszero %r0, L1
  20  ref_return $<* struct pypy.interpreter.baseobjspace.W_Root>
  22  ---
  22  L1:
  22  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x10096124f10> -> %r1
  26  setfield_gc_r %r1, %r0, FieldDescr<pypy.objspace.std.bytesobject.W_BytesObject.inst__value>
  31  ref_return %r1
