   0  int_mul %i0, $3 -> %i0
   4  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x0000560964144640> -> %r0
   8  inline_call_ir_v <JitCode 'W_UnicodeBuilder.__init__'>, I[%i0], R[%r0]
  15  -live- %r0
  18  ref_return %r0
