What is RecordMopInitTable used for

[Warfley]

I'm currently playing a bit around in the RTTI initialization and finalization code of the FPC, and I found the following:

Code: Pascal  [Select][+][-]

1.            { for management operators like initialize call int_initialize }
2.            vmt := PVmt(self);
3.            if assigned(vmt) then
4.              begin
5.                inittable:=vmt^.vInitTable;
6.                if assigned(inittable) then
7.                  begin
8.                    mopinittable:=RTTIRecordMopInitTable(inittable);
9.                    if assigned(mopinittable) then
10.                      begin
11.                        {$push}
12.                        { ensure that no range check errors pop up with the [0..0] array }
13.                        {$R-}
14.                        for i:=0 to mopinittable^.Count-1 do
15.                          TRTTIRecVarOp(mopinittable^.Entries[i].ManagmentOperator)(PByte(Instance)+mopinittable^.Entries[i].FieldOffset);
16.                        {$pop}
17.                      end;
18.                  end;
19.              end;
20.  

Which, first, the very first comment seems to be outdated as it does not call int_initialize/fpc_initialize anymore.
Second, when looking at how records are initialized, it uses a different approach, by simply iterating over the RTTI fields and calling fpc_initialize on them:

Code: Pascal  [Select][+][-]

1.       { if possible try to use more optimal initrtti }
2.       with RTTIRecordOp(typeinfo, typeinfo)^ do
3.       begin
4.         recordrtti(data,typeinfo,@int_initialize);
5.         if Assigned(recordop) and Assigned(recordop^.Initialize) then
6.           recordop^.Initialize(data);
7.       end;
8.  

Also CleanupInstance is using the "old" rtti way:

Code: Pascal  [Select][+][-]

1.                { The RTTI format matches one for records, except the type is tkClass.
2.                  Since RecordRTTI does not check the type, calling it yields the desired result. }
3.                if Assigned(Temp) then
4.                  RecordRTTI(Self,Temp,@int_finalize);
5.  

As this is the only point where RTTIRecordMopInitTable is being used within the whole codebase (at least if the gitlab search is correct), I was wondering what this is about? Is there something special for classes, or is this maybe just a new implementation which is simply not fully finished and therefore just implemented for class initialization?