   0  getarrayitem_raw_i %i0, $0, <rpython.jit.backend.llsupport.descr.ArrayDescr object at 0x7fff4f8acc30> -> %i0
   6  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x7fff4b2aefa0> -> %r1
  10  setfield_gc_i %r1, $<* None>, FieldDescr<pypy.module._cffi_backend.cdataobj.W_CData.inst__ptr>
  15  setfield_gc_i %r1, %i0, FieldDescr<pypy.module._cffi_backend.cdataobj.W_CData.inst__ptr>
  20  setfield_gc_r %r1, %r0, FieldDescr<pypy.module._cffi_backend.cdataobj.W_CData.inst_ctype>
  25  ref_return %r1
