   0  inline_call_r_i <JitCode 'allocate_ll_lock'>, R[] -> %i0
   5  -live- %i0
   8  residual_call_r_r $<* fn _ll_0_alloc_with_del___>, R[], <CallDescr() EF=5> -> %r0
  14  -live- %i0, %r0
  17  setfield_gc_i %r0, $0, FieldDescr<rpython.rlib.rthread.Lock.special_memory_pressure>
  22  setfield_gc_i %r0, %i0, FieldDescr<rpython.rlib.rthread.Lock.inst__lock>
  27  residual_call_ir_v $<* fn _ll_2_gc_add_memory_pressure__Signed_rpython_rlib_rthread_LockPtr>, I[$40], R[%r0], <CallDescr(ir) EF=7>
  35  -live- %r0
  38  ref_return %r0
