   0  getfield_gc_r_pure %r0, FieldDescr<pypy.module.array.interp_array.ArrayBuffer.inst_w_array> -> %r0
   5  getfield_gc_i %r0, FieldDescr<pypy.module.array.interp_array.W_ArrayBase.inst_len> -> %i0
  10  -live- %i0, %r0
  13  guard_class %r0 -> %i1
  16  getfield_raw_i %i1, FieldDescr<pypy.interpreter.baseobjspace.W_Root_vtable.cls_itemsize> -> %i1
  21  int_mul %i0, %i1 -> %i0
  25  int_return %i0
