   0  getfield_gc_i %r0, FieldDescr<rpython.rtyper.lltypesystem.rffi.scoped_alloc_buffer.inst_raw> -> %i1
   5  getfield_gc_r %r0, FieldDescr<rpython.rtyper.lltypesystem.rffi.scoped_alloc_buffer.inst_gc_buf> -> %r1
  10  getfield_gc_i %r0, FieldDescr<rpython.rtyper.lltypesystem.rffi.scoped_alloc_buffer.inst_case_num> -> %i2
  15  getfield_gc_i %r0, FieldDescr<rpython.rtyper.lltypesystem.rffi.scoped_alloc_buffer.inst_size> -> %i3
  20  residual_call_ir_r $<* fn str_from_buffer>, I[%i1, %i2, %i3, %i0], R[%r1], <CallDescr(iriii) EF=5> -> %r0
  32  -live- %r0
  35  ref_return %r0
