freepascal.compiler/compiler/symdef.pas

{
    Symbol table implementation for the definitions

    Copyright (c) 1998-2005 by Florian Klaempfl, Pierre Muller

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 ****************************************************************************
}
unit symdef;

{$i fpcdefs.inc}

interface

    uses
       { common }
       cclasses,
       { global }
       globtype,globals,tokens,constexp,
       { symtable }
       symconst,symbase,symtype,
       { ppu }
       ppu,
       { node }
       node,
       { aasm }
       aasmbase,aasmtai,aasmdata,
       cpubase,cpuinfo,
       cgbase,cgutils,
       parabase
       ;


    type
{************************************************
                    TDef
************************************************}

       { tstoreddef }

       tstoreddef = class(tdef)
       protected
          typesymderef  : tderef;
       public
{$ifdef EXTDEBUG}
          fileinfo   : tfileposinfo;
{$endif}
          { generic support }
          genericdef      : tstoreddef;
          genericdefderef : tderef;
          generictokenbuf : tdynamicarray;
          constructor create(dt:tdeftyp);
          constructor ppuload(dt:tdeftyp;ppufile:tcompilerppufile);
          destructor  destroy;override;
          procedure reset;virtual;
          function getcopy : tstoreddef;virtual;
          procedure ppuwrite(ppufile:tcompilerppufile);virtual;
          procedure buildderef;override;
          procedure buildderefimpl;override;
          procedure deref;override;
          procedure derefimpl;override;
          function  size:aint;override;
          function  getvardef:longint;override;
          function  alignment:shortint;override;
          function  is_publishable : boolean;override;
          function  needs_inittable : boolean;override;
          function  rtti_mangledname(rt:trttitype):string;override;
{$ifdef support_llvm}
          function  llvm_mangledname:string;override;
{$endif support_llvm}
          { regvars }
          function is_intregable : boolean;
          function is_fpuregable : boolean;
          { generics }
          procedure initgeneric;
       protected
{$ifdef support_llvm}
          procedure set_llvm_name_syms; virtual;
          function get_llvm_name_sym: tasmsymbol;override;
          function get_llvm_pointer_name_sym: tasmsymbol;override;
{$endif support_llvm}
       private
          savesize  : aint;
       end;

       tfiletyp = (ft_text,ft_typed,ft_untyped);

       tfiledef = class(tstoreddef)
          filetyp : tfiletyp;
          typedfiledef : tdef;
          typedfiledefderef : tderef;
          constructor createtext;
          constructor createuntyped;
          constructor createtyped(def : tdef);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          function  GetTypeName:string;override;
          function  getmangledparaname:string;override;
          procedure setsize;
{$ifdef support_llvm}
          function  llvm_mangledname:string;override;
{$endif support_llvm}
       end;

       tvariantdef = class(tstoreddef)
          varianttype : tvarianttype;
          constructor create(v : tvarianttype);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          function GetTypeName:string;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  getvardef:longint;override;
          procedure setsize;
          function is_publishable : boolean;override;
          function needs_inittable : boolean;override;
{$ifdef support_llvm}
          function  llvm_mangledname:string;override;
{$endif support_llvm}
       end;

       tformaldef = class(tstoreddef)
          typed:boolean;
          constructor create(Atyped:boolean);
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
       end;

       tforwarddef = class(tstoreddef)
          tosymname : pshortstring;
          forwardpos : tfileposinfo;
          constructor create(const s:string;const pos : tfileposinfo);
          destructor destroy;override;
          function  GetTypeName:string;override;
       end;

       tundefineddef = class(tstoreddef)
          constructor create;
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
       end;

       terrordef = class(tstoreddef)
          constructor create;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  getmangledparaname : string;override;
       end;

       tabstractpointerdef = class(tstoreddef)
          pointeddef : tdef;
          pointeddefderef : tderef;
          constructor create(dt:tdeftyp;def:tdef);
          constructor ppuload(dt:tdeftyp;ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
       end;

       tpointerdef = class(tabstractpointerdef)
          is_far : boolean;
          constructor create(def:tdef);
          constructor createfar(def:tdef);
          function getcopy : tstoreddef;override;
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
{$ifdef support_llvm}
          function  llvm_mangledname:string;override;
{$endif support_llvm}
       end;

       tabstractrecorddef= class(tstoreddef)
          symtable : TSymtable;
          cloneddef      : tabstractrecorddef;
          cloneddefderef : tderef;
          procedure reset;override;
          function  GetSymtable(t:tGetSymtable):TSymtable;override;
          function is_packed:boolean;
       end;

       trecorddef = class(tabstractrecorddef)
       public
          isunion       : boolean;
          constructor create(p : TSymtable);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor destroy;override;
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          function  size:aint;override;
          function  alignment : shortint;override;
          function  padalignment: shortint;
          function  GetTypeName:string;override;
          { debug }
          function  needs_inittable : boolean;override;
       end;

       tprocdef = class;
       tobjectdef = class;

       { TImplementedInterface }

       TImplementedInterface = class
         IntfDef      : tobjectdef;
         IntfDefDeref : tderef;
         IType        : tinterfaceentrytype;
         IOffset      : longint;
         VtblImplIntf : TImplementedInterface;
         NameMappings : TFPHashList;
         ProcDefs     : TFPObjectList;
         ImplementsGetter :  tsym;
         constructor create(aintf: tobjectdef);
         constructor create_deref(d:tderef);
         destructor  destroy; override;
         function  getcopy:TImplementedInterface;
         procedure buildderef;
         procedure deref;
         procedure AddMapping(const origname, newname: string);
         function  GetMapping(const origname: string):string;
         procedure AddImplProc(pd:tprocdef);
         function  IsImplMergePossible(MergingIntf:TImplementedInterface;out weight: longint): boolean;
       end;

       { tvmtentry }
       tvmtentry = record
         procdef      : tprocdef;
         procdefderef : tderef;
         visibility   : tvisibility;
       end;
       pvmtentry = ^tvmtentry;

       { tobjectdef }

       tobjectdef = class(tabstractrecorddef)
{$ifdef support_llvm}
       private
          fllvm_class_struct_name_sym : tasmsymbol;
          fllvm_vmt_name_sym : tasmsymbol;
          procedure set_llvm_name_syms; override;
          function get_llvm_class_struct_name_sym: tasmsymbol;
          function get_llvm_vmt_name_sym: tasmsymbol;
{$endif}
       public
          dwarf_struct_lab : tasmsymbol;
          childof        : tobjectdef;
          childofderef   : tderef;

          objname,
          objrealname    : pshortstring;
          objectoptions  : tobjectoptions;
          { to be able to have a variable vmt position }
          { and no vmt field for objects without virtuals }
          vmtentries     : TFPList;
          vmt_offset     : longint;
          writing_class_record_dbginfo : boolean;
          objecttype     : tobjecttyp;
          iidguid        : pguid;
          iidstr         : pshortstring;
          { store implemented interfaces defs and name mappings }
          ImplementedInterfaces : TFPObjectList;
          constructor create(ot : tobjecttyp;const n : string;c : tobjectdef);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor  destroy;override;
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function GetTypeName:string;override;
          procedure buildderef;override;
          procedure deref;override;
          procedure buildderefimpl;override;
          procedure derefimpl;override;
          procedure resetvmtentries;
          procedure copyvmtentries(objdef:tobjectdef);
          function  getparentdef:tdef;override;
          function  size : aint;override;
          function  alignment:shortint;override;
          function  vmtmethodoffset(index:longint):longint;
          function  members_need_inittable : boolean;
          function  find_implemented_interface(aintfdef:tobjectdef):TImplementedInterface;
          { this should be called when this class implements an interface }
          procedure prepareguid;
          function  is_publishable : boolean;override;
          function  needs_inittable : boolean;override;
          function  vmt_mangledname : string;
          procedure check_forwards;
          function  is_related(d : tdef) : boolean;override;
          procedure insertvmt;
          procedure set_parent(c : tobjectdef);
          function FindDestructor : tprocdef;
          function implements_any_interfaces: boolean;
{$ifdef support_llvm}
          property llvm_class_struct_name_sym: tasmsymbol read get_llvm_class_struct_name_sym;
          property llvm_vmt_name_sym: tasmsymbol read get_llvm_vmt_name_sym;
          procedure reset; override;
{$endif support_llvm}
       end;

       tclassrefdef = class(tabstractpointerdef)
          constructor create(def:tdef);
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function GetTypeName:string;override;
          function  is_publishable : boolean;override;
{$ifdef support_llvm}
       protected
          procedure set_llvm_name_syms; override;
{$endif}
       end;

       tarraydef = class(tstoreddef)
          lowrange,
          highrange  : aint;
          rangedef   : tdef;
          rangedefderef : tderef;
          arrayoptions : tarraydefoptions;
       protected
          _elementdef : tdef;
          _elementdefderef : tderef;
          procedure setelementdef(def:tdef);
       public
          function elesize : aint;
          function elepackedbitsize : aint;
          function elecount : aword;
          constructor create_from_pointer(def:tdef);
          constructor create(l,h : aint;def:tdef);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  getmangledparaname : string;override;
          procedure buildderef;override;
          procedure deref;override;
          function size : aint;override;
          function alignment : shortint;override;
          { returns the label of the range check string }
          function needs_inittable : boolean;override;
          property elementdef : tdef read _elementdef write setelementdef;
          function is_publishable : boolean;override;
       end;

       torddef = class(tstoreddef)
          low,high : TConstExprInt;
          ordtype  : tordtype;
          constructor create(t : tordtype;v,b : TConstExprInt);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  is_publishable : boolean;override;
          function  GetTypeName:string;override;
          function alignment:shortint;override;
          procedure setsize;
          function  packedbitsize: aint; override;
          function getvardef : longint;override;
       end;

       tfloatdef = class(tstoreddef)
          floattype : tfloattype;
          constructor create(t : tfloattype);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
          function alignment:shortint;override;
          procedure setsize;
          function  getvardef:longint;override;
       end;

       tabstractprocdef = class(tstoreddef)
          { saves a definition to the return type }
          returndef       : tdef;
          returndefderef  : tderef;
          parast          : TSymtable;
          paras           : tparalist;
          proctypeoption  : tproctypeoption;
          proccalloption  : tproccalloption;
          procoptions     : tprocoptions;
          requiredargarea : aint;
          { number of user visibile parameters }
          maxparacount,
          minparacount    : byte;
{$ifdef m68k}
          exp_funcretloc : tregister;   { explicit funcretloc for AmigaOS }
{$endif}
          funcretloc : array[tcallercallee] of TLocation;
          has_paraloc_info : boolean; { paraloc info is available }
          constructor create(dt:tdeftyp;level:byte);
          constructor ppuload(dt:tdeftyp;ppufile:tcompilerppufile);
          destructor destroy;override;
          procedure  ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          procedure calcparas;
          function  typename_paras(showhidden:boolean): string;
          function  is_methodpointer:boolean;virtual;
          function  is_addressonly:boolean;virtual;
       private
          procedure count_para(p:TObject;arg:pointer);
          procedure insert_para(p:TObject;arg:pointer);
       end;

       tprocvardef = class(tabstractprocdef)
          constructor create(level:byte);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetSymtable(t:tGetSymtable):TSymtable;override;
          function  size : aint;override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
          function  is_methodpointer:boolean;override;
          function  is_addressonly:boolean;override;
          function  getmangledparaname:string;override;
       end;

       tmessageinf = record
         case integer of
           0 : (str : pshortstring);
           1 : (i : longint);
       end;

       tinlininginfo = record
          { node tree }
          code  : tnode;
          flags : tprocinfoflags;
       end;
       pinlininginfo = ^tinlininginfo;


{$ifdef oldregvars}
       { register variables }
       pregvarinfo = ^tregvarinfo;
       tregvarinfo = record
          regvars : array[1..maxvarregs] of tsym;
          regvars_para : array[1..maxvarregs] of boolean;
          regvars_refs : array[1..maxvarregs] of longint;

          fpuregvars : array[1..maxfpuvarregs] of tsym;
          fpuregvars_para : array[1..maxfpuvarregs] of boolean;
          fpuregvars_refs : array[1..maxfpuvarregs] of longint;
       end;
{$endif oldregvars}

       tprocdef = class(tabstractprocdef)
       private
          _mangledname : pshortstring;
       public
          messageinf : tmessageinf;
          dispid : longint;
          extnumber      : word;
{$ifndef EXTDEBUG}
          { where is this function defined and what were the symbol
            flags, needed here because there
            is only one symbol for all overloaded functions
            EXTDEBUG has fileinfo in tdef (PFV) }
          fileinfo : tfileposinfo;
{$endif}
          visibility : tvisibility;
          symoptions : tsymoptions;
          { symbol owning this definition }
          procsym : tsym;
          procsymderef : tderef;
          { alias names }
          aliasnames : TCmdStrList;
          { symtables }
          localst : TSymtable;
          funcretsym : tsym;
          funcretsymderef : tderef;
          _class : tobjectdef;
          _classderef : tderef;
{$if defined(powerpc) or defined(m68k)}
          { library symbol for AmigaOS/MorphOS }
          libsym : tsym;
          libsymderef : tderef;
{$endif powerpc or m68k}
          { name of the result variable to insert in the localsymtable }
          resultname : pshortstring;
          { true, if the procedure is only declared
            (forward procedure) }
          forwarddef,
          { true if the procedure is declared in the interface }
          interfacedef : boolean;
          { true if the procedure has a forward declaration }
          hasforward : boolean;
          { import info }
          import_dll,
          import_name : pshortstring;
          import_nr   : word;
          { info for inlining the subroutine, if this pointer is nil,
            the procedure can't be inlined }
          inlininginfo : pinlininginfo;
{$ifdef oldregvars}
          regvarinfo: pregvarinfo;
{$endif oldregvars}
{$ifdef i386}
          fpu_used     : byte;
{$endif i386}
          { position in aasmoutput list }
          procstarttai,
          procendtai   : tai;
          constructor create(level:byte);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor  destroy;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure buildderefimpl;override;
          procedure deref;override;
          procedure derefimpl;override;
          procedure reset;override;
          function  GetSymtable(t:tGetSymtable):TSymtable;override;
          function  GetTypeName : string;override;
          function  mangledname : string;
          procedure setmangledname(const s : string);
          function  fullprocname(showhidden:boolean):string;
          function  cplusplusmangledname : string;
          function  is_methodpointer:boolean;override;
          function  is_addressonly:boolean;override;
       end;

       { single linked list of overloaded procs }
       pprocdeflist = ^tprocdeflist;
       tprocdeflist = record
         def  : tprocdef;
         defderef : tderef;
         next : pprocdeflist;
       end;

       tstringdef = class(tstoreddef)
          stringtype : tstringtype;
          len        : aint;
          constructor createshort(l : byte);
          constructor loadshort(ppufile:tcompilerppufile);
          constructor createlong(l : aint);
          constructor loadlong(ppufile:tcompilerppufile);
          constructor createansi;
          constructor loadansi(ppufile:tcompilerppufile);
          constructor createwide;
          constructor loadwide(ppufile:tcompilerppufile);
          constructor createunicode;
          constructor loadunicode(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          function  stringtypname:string;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  getmangledparaname:string;override;
          function  is_publishable : boolean;override;
          function alignment : shortint;override;
          function  needs_inittable : boolean;override;
          function  getvardef:longint;override;
       end;

       tenumdef = class(tstoreddef)
          minval,
          maxval    : aint;
          has_jumps : boolean;
          firstenum : tsym;  {tenumsym}
          basedef   : tenumdef;
          basedefderef : tderef;
          constructor create;
          constructor create_subrange(_basedef:tenumdef;_min,_max:aint);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          procedure derefimpl;override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
          procedure calcsavesize;
          function  packedbitsize: aint; override;
          procedure setmax(_max:aint);
          procedure setmin(_min:aint);
          function  min:aint;
          function  max:aint;
       end;

       tsetdef = class(tstoreddef)
          elementdef : tdef;
          elementdefderef : tderef;
          setbase,
          setmax   : aword;
          constructor create(def:tdef;low, high : aint);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
       end;

    var
       current_objectdef : tobjectdef;  { used for private functions check !! }

    { default types }
       generrordef,              { error in definition }
       voidpointertype,           { pointer for Void-pointeddef }
       charpointertype,           { pointer for Char-pointeddef }
       widecharpointertype,       { pointer for WideChar-pointeddef }
       voidfarpointertype,
       cundefinedtype,
       cformaltype,               { unique formal definition }
       ctypedformaltype,          { unique typed formal definition }
       voidtype,                  { Void (procedure) }
       cchartype,                 { Char }
       cwidechartype,             { WideChar }
       booltype,                  { boolean type }
       bool8type,
       bool16type,
       bool32type,
       bool64type,                { implement me }
       u8inttype,                 { 8-Bit unsigned integer }
       s8inttype,                 { 8-Bit signed integer }
       u16inttype,                { 16-Bit unsigned integer }
       s16inttype,                { 16-Bit signed integer }
       u32inttype,                { 32-Bit unsigned integer }
       s32inttype,                { 32-Bit signed integer }
       u64inttype,                { 64-bit unsigned integer }
       s64inttype,                { 64-bit signed integer }
       s32floattype,              { pointer for realconstn }
       s64floattype,              { pointer for realconstn }
       s80floattype,              { pointer to type of temp. floats }
       s64currencytype,           { pointer to a currency type }
       cshortstringtype,          { pointer to type of short string const   }
       clongstringtype,           { pointer to type of long string const   }
       cansistringtype,           { pointer to type of ansi string const  }
       cwidestringtype,           { pointer to type of wide string const  }
       cunicodestringtype,
       openshortstringtype,       { pointer to type of an open shortstring,
                                    needed for readln() }
       openchararraytype,         { pointer to type of an open array of char,
                                    needed for readln() }
       cfiletype,                 { get the same definition for all file }
                                  { used for stabs }
       methodpointertype,         { typecasting of methodpointers to extract self }
       hresultdef,
       { we use only one variant def for every variant class }
       cvarianttype,
       colevarianttype,
       { default integer type s32inttype on 32 bit systems, s64bittype on 64 bit systems }
       sinttype,
       uinttype,
       { unsigned and signed ord type with the same size as a pointer }
       ptruinttype,
       ptrsinttype,
       { several types to simulate more or less C++ objects for GDB }
       vmttype,
       vmtarraytype,
       pvmttype      : tdef;     { type of classrefs, used for stabs }

       { pointer to the anchestor of all classes }
       class_tobject : tobjectdef;
       { pointer to the ancestor of all COM interfaces }
       interface_iunknown : tobjectdef;
       { pointer to the TGUID type
         of all interfaces         }
       rec_tguid : trecorddef;

    const
{$ifdef i386}
       pbestrealtype : ^tdef = @s80floattype;
{$endif}
{$ifdef x86_64}
       pbestrealtype : ^tdef = @s80floattype;
{$endif}
{$ifdef m68k}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef alpha}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef powerpc}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef POWERPC64}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef ia64}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef SPARC}
       pbestrealtype : ^tdef = @s64floattype;
{$endif SPARC}
{$ifdef vis}
       pbestrealtype : ^tdef = @s64floattype;
{$endif vis}
{$ifdef ARM}
       pbestrealtype : ^tdef = @s64floattype;
{$endif ARM}
{$ifdef MIPS}
       pbestrealtype : ^tdef = @s64floattype;
{$endif MIPS}
{$ifdef AVR}
       pbestrealtype : ^tdef = @s64floattype;
{$endif AVR}

    function make_mangledname(const typeprefix:string;st:TSymtable;const suffix:string):string;

    { should be in the types unit, but the types unit uses the node stuff :( }
    function is_interfacecom(def: tdef): boolean;
    function is_interfacecorba(def: tdef): boolean;
    function is_interface(def: tdef): boolean;
    function is_dispinterface(def: tdef): boolean;
    function is_object(def: tdef): boolean;
    function is_class(def: tdef): boolean;
    function is_cppclass(def: tdef): boolean;
    function is_class_or_interface(def: tdef): boolean;
    function is_class_or_interface_or_object(def: tdef): boolean;
    function is_class_or_interface_or_dispinterface(def: tdef): boolean;


{$ifdef x86}
    function use_sse(def : tdef) : boolean;
{$endif x86}

implementation

    uses
      SysUtils,
      cutils,
      { global }
      verbose,
      { target }
      systems,aasmcpu,paramgr,
      { symtable }
      symsym,symtable,symutil,defutil,
      { module }
      fmodule,
      { other }
      gendef,
      fpccrc
      ;

{****************************************************************************
                                  Constants
****************************************************************************}

    const
      varempty = 0;
      varnull = 1;
      varsmallint = 2;
      varinteger = 3;
      varsingle = 4;
      vardouble = 5;
      varcurrency = 6;
      vardate = 7;
      varolestr = 8;
      vardispatch = 9;
      varerror = 10;
      varboolean = 11;
      varvariant = 12;
      varunknown = 13;
      vardecimal = 14;
      varshortint = 16;
      varbyte = 17;
      varword = 18;
      varlongword = 19;
      varint64 = 20;
      varqword = 21;
      varunicodestr = 22;

      varUndefined = -1;

      varstrarg = $48;
      varstring = $100;
      varany = $101;
      vardefmask = $fff;
      vararray = $2000;
      varbyref = $4000;

{****************************************************************************
                                  Helpers
****************************************************************************}

    function make_mangledname(const typeprefix:string;st:TSymtable;const suffix:string):string;
      var
        s,hs,
        prefix : string;
        oldlen,
        newlen,
        i   : longint;
        crc : dword;
        hp  : tparavarsym;
      begin
        prefix:='';
        if not assigned(st) then
         internalerror(200204212);
        { sub procedures }
        while (st.symtabletype=localsymtable) do
         begin
           if st.defowner.typ<>procdef then
            internalerror(200204173);
           { Add the full mangledname of procedure to prevent
             conflicts with 2 overloads having both a nested procedure
             with the same name, see tb0314 (PFV) }
           s:=tprocdef(st.defowner).procsym.name;
           oldlen:=length(s);
           for i:=0 to tprocdef(st.defowner).paras.count-1 do
            begin
              hp:=tparavarsym(tprocdef(st.defowner).paras[i]);
              if not(vo_is_hidden_para in hp.varoptions) then
                s:=s+'$'+hp.vardef.mangledparaname;
            end;
           if not is_void(tprocdef(st.defowner).returndef) then
             s:=s+'$$'+tprocdef(st.defowner).returndef.mangledparaname;
           newlen:=length(s);
           { Replace with CRC if the parameter line is very long }
           if (newlen-oldlen>12) and
              ((newlen+length(prefix)>128) or (newlen-oldlen>32)) then
             begin
               crc:=0;
               for i:=0 to tprocdef(st.defowner).paras.count-1 do
                 begin
                   hp:=tparavarsym(tprocdef(st.defowner).paras[i]);
                   if not(vo_is_hidden_para in hp.varoptions) then
                     begin
                       hs:=hp.vardef.mangledparaname;
                       crc:=UpdateCrc32(crc,hs[1],length(hs));
                     end;
                 end;
               hs:=hp.vardef.mangledparaname;
               crc:=UpdateCrc32(crc,hs[1],length(hs));
               s:=Copy(s,1,oldlen)+'$crc'+hexstr(crc,8);
             end;
           if prefix<>'' then
             prefix:=s+'_'+prefix
           else
             prefix:=s;
           st:=st.defowner.owner;
         end;
        { object/classes symtable }
        if (st.symtabletype=ObjectSymtable) then
         begin
           if st.defowner.typ<>objectdef then
            internalerror(200204174);
           prefix:=tobjectdef(st.defowner).objname^+'_$_'+prefix;
           st:=st.defowner.owner;
         end;
        { symtable must now be static or global }
        if not(st.symtabletype in [staticsymtable,globalsymtable]) then
         internalerror(200204175);
        result:='';
        if typeprefix<>'' then
          result:=result+typeprefix+'_';
        { Add P$ for program, which can have the same name as
          a unit }
        if (TSymtable(main_module.localsymtable)=st) and
           (not main_module.is_unit) then
          result:=result+'P$'+st.name^
        else
          result:=result+st.name^;
        if prefix<>'' then
          result:=result+'_'+prefix;
        if suffix<>'' then
          result:=result+'_'+suffix;
        { the Darwin assembler assumes that all symbols starting with 'L' are local }
        { Further, the Mac OS X 10.5 linker does not consider symbols which do not  }
        { start with '_' as regular symbols (it does not generate N_GSYM entries    }
        { those in the debug map, leading to troubles with dsymutil). So always     }
        { add an underscore on darwin.                                              }
        if (target_info.system in systems_darwin) then
          result := '_' + result;
      end;


{****************************************************************************
                     TDEF (base class for definitions)
****************************************************************************}

    constructor tstoreddef.create(dt:tdeftyp);
      var
        insertstack : psymtablestackitem;
      begin
         inherited create(dt);
         savesize := 0;
{$ifdef EXTDEBUG}
         fileinfo := current_filepos;
{$endif}
         generictokenbuf:=nil;
         genericdef:=nil;
         { Don't register forwarddefs, they are disposed at the
           end of an type block }
         if (dt=forwarddef) then
           exit;
         { Register in current_module }
         if assigned(current_module) then
           begin
             current_module.deflist.Add(self);
             DefId:=current_module.deflist.Count-1;
           end;
         { Register in symtable stack }
         if assigned(symtablestack) then
           begin
             insertstack:=symtablestack.stack;
             while assigned(insertstack) and
                   (insertstack^.symtable.symtabletype=withsymtable) do
               insertstack:=insertstack^.next;
             if not assigned(insertstack) then
               internalerror(200602044);
             insertstack^.symtable.insertdef(self);
           end;
      end;


    destructor tstoreddef.destroy;
      begin
        { Direct calls are not allowed, use symtable.deletedef() }
        if assigned(owner) then
          internalerror(200612311);
        if assigned(generictokenbuf) then
          begin
            generictokenbuf.free;
            generictokenbuf:=nil;
          end;
        inherited destroy;
      end;


    constructor tstoreddef.ppuload(dt:tdeftyp;ppufile:tcompilerppufile);
      var
        sizeleft,i : longint;
        buf  : array[0..255] of byte;
      begin
         inherited create(dt);
         DefId:=ppufile.getlongint;
         current_module.deflist[DefId]:=self;
{$ifdef EXTDEBUG}
         fillchar(fileinfo,sizeof(fileinfo),0);
{$endif}
         { load }
         ppufile.getderef(typesymderef);
         ppufile.getsmallset(defoptions);
         ppufile.getsmallset(defstates);
         if df_generic in defoptions then
           begin
             sizeleft:=ppufile.getlongint;
             initgeneric;
             while sizeleft>0 do
               begin
                 if sizeleft>sizeof(buf) then
                   i:=sizeof(buf)
                 else
                   i:=sizeleft;
                 ppufile.getdata(buf,i);
                 generictokenbuf.write(buf,i);
                 dec(sizeleft,i);
               end;
           end;
        if df_specialization in defoptions then
          ppufile.getderef(genericdefderef);
      end;


    function Tstoreddef.rtti_mangledname(rt:trttitype):string;
      var
        prefix : string[4];
      begin
        if rt=fullrtti then
          begin
            prefix:='RTTI';
            include(defstates,ds_rtti_table_used);
          end
        else
          begin
            prefix:='INIT';
            include(defstates,ds_init_table_used);
          end;
        if assigned(typesym) and
           (owner.symtabletype in [staticsymtable,globalsymtable]) then
          result:=make_mangledname(prefix,owner,typesym.name)
        else
          result:=make_mangledname(prefix,findunitsymtable(owner),'DEF'+tostr(DefId))
      end;


{$ifdef support_llvm}
    function Tstoreddef.llvm_mangledname:string;
      begin
        if assigned(typesym) and
           (owner.symtabletype in [staticsymtable,globalsymtable]) then
          result:=make_mangledname('llvm$$$',owner,typesym.name+'_DEF'+tostr(DefId))
        else
          result:=make_mangledname('llvm$$$',findunitsymtable(owner),'DEF'+tostr(DefId));
        result:='%'+result;
      end;
{$endif support_llvm}


    procedure Tstoreddef.reset;
      begin
{$ifdef support_llvm}
        fllvm_name_sym:=nil;
        fllvm_pointer_name_sym:=nil;
{$endif support_llvm}
      end;


    function tstoreddef.getcopy : tstoreddef;
      begin
        Message(sym_e_cant_create_unique_type);
        getcopy:=terrordef.create;
      end;


    procedure tstoreddef.ppuwrite(ppufile:tcompilerppufile);
      var
        sizeleft,i : longint;
        buf  : array[0..255] of byte;
        oldintfcrc : boolean;
      begin
        ppufile.putlongint(DefId);
        ppufile.putderef(typesymderef);
        ppufile.putsmallset(defoptions);
        oldintfcrc:=ppufile.do_crc;
        ppufile.do_crc:=false;
        ppufile.putsmallset(defstates);
        if df_generic in defoptions then
          begin
            if assigned(generictokenbuf) then
              begin
                sizeleft:=generictokenbuf.size;
                generictokenbuf.seek(0);
              end
            else
              sizeleft:=0;
            ppufile.putlongint(sizeleft);
            while sizeleft>0 do
              begin
                if sizeleft>sizeof(buf) then
                  i:=sizeof(buf)
                else
                  i:=sizeleft;
                generictokenbuf.read(buf,i);
                ppufile.putdata(buf,i);
                dec(sizeleft,i);
              end;
          end;
        ppufile.do_crc:=oldintfcrc;
        if df_specialization in defoptions then
          ppufile.putderef(genericdefderef);
      end;


    procedure tstoreddef.buildderef;
      begin
        typesymderef.build(typesym);
        genericdefderef.build(genericdef);
      end;


    procedure tstoreddef.buildderefimpl;
      begin
      end;


    procedure tstoreddef.deref;
      begin
        typesym:=ttypesym(typesymderef.resolve);
        if df_specialization in defoptions then
          genericdef:=tstoreddef(genericdefderef.resolve);
      end;


    procedure tstoreddef.derefimpl;
      begin
      end;


    function tstoreddef.size : aint;
      begin
         size:=savesize;
      end;


    function tstoreddef.getvardef:longint;
      begin
        result:=varUndefined;
      end;


    function tstoreddef.alignment : shortint;
      begin
         { natural alignment by default }
         alignment:=size_2_align(savesize);
      end;


    { returns true, if the definition can be published }
    function tstoreddef.is_publishable : boolean;
      begin
         is_publishable:=false;
      end;


    { needs an init table }
    function tstoreddef.needs_inittable : boolean;
      begin
         needs_inittable:=false;
      end;


   function tstoreddef.is_intregable : boolean;
     var
       recsize,temp: longint;
     begin
        is_intregable:=false;
        case typ of
          orddef,
          pointerdef,
          enumdef,
          classrefdef:
            is_intregable:=true;
          procvardef :
            is_intregable:=not(po_methodpointer in tprocvardef(self).procoptions);
          objectdef:
            is_intregable:=(is_class(self) or is_interface(self)) and not needs_inittable;
          setdef:
            is_intregable:=is_smallset(self);
          recorddef:
            begin
              recsize:=size;
              is_intregable:=
                ispowerof2(recsize,temp) and
                (recsize <= sizeof(aint));
            end;
        end;
     end;


   function tstoreddef.is_fpuregable : boolean;
     begin
{$ifdef x86}
       result:=use_sse(self);
{$else x86}
       result:=(typ=floatdef) and not(cs_fp_emulation in current_settings.moduleswitches);
{$endif x86}
     end;


   procedure tstoreddef.initgeneric;
     begin
       if assigned(generictokenbuf) then
         internalerror(200512131);
       generictokenbuf:=tdynamicarray.create(256);
     end;


{$ifdef support_llvm}
    procedure tstoreddef.set_llvm_name_syms;
      begin
        if not assigned(fllvm_name_sym) then
          begin
            fllvm_name_sym:=current_asmdata.DefineAsmSymbol(llvm_mangledname,AB_LOCAL,AT_DATA);
            fllvm_pointer_name_sym:=current_asmdata.DefineAsmSymbol(llvm_mangledname+'*',AB_LOCAL,AT_DATA);
          end;
      end;


    function tstoreddef.get_llvm_name_sym: tasmsymbol;
      begin
        set_llvm_name_syms;
        result:=fllvm_name_sym;
      end;


    function tstoreddef.get_llvm_pointer_name_sym: tasmsymbol;
      begin
        set_llvm_name_syms;
        result:=fllvm_pointer_name_sym;
      end;
{$endif support_llvm}


{****************************************************************************
                               Tstringdef
****************************************************************************}

    constructor tstringdef.createshort(l : byte);
      begin
         inherited create(stringdef);
         stringtype:=st_shortstring;
         len:=l;
         savesize:=len+1;
      end;


    constructor tstringdef.loadshort(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         stringtype:=st_shortstring;
         len:=ppufile.getbyte;
         savesize:=len+1;
      end;


    constructor tstringdef.createlong(l : aint);
      begin
         inherited create(stringdef);
         stringtype:=st_longstring;
         len:=l;
         savesize:=sizeof(pint);
      end;


    constructor tstringdef.loadlong(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         stringtype:=st_longstring;
         len:=ppufile.getaint;
         savesize:=sizeof(pint);
      end;


    constructor tstringdef.createansi;
      begin
         inherited create(stringdef);
         stringtype:=st_ansistring;
         len:=-1;
         savesize:=sizeof(pint);
      end;


    constructor tstringdef.loadansi(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         stringtype:=st_ansistring;
         len:=ppufile.getaint;
         savesize:=sizeof(pint);
      end;


    constructor tstringdef.createwide;
      begin
         inherited create(stringdef);
         stringtype:=st_widestring;
         len:=-1;
         savesize:=sizeof(pint);
      end;


    constructor tstringdef.loadwide(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         stringtype:=st_widestring;
         len:=ppufile.getaint;
         savesize:=sizeof(pint);
      end;


    constructor tstringdef.createunicode;
      begin
         inherited create(stringdef);
         stringtype:=st_unicodestring;
         len:=-1;
         savesize:=sizeof(pint);
      end;


    constructor tstringdef.loadunicode(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         stringtype:=st_unicodestring;
         len:=ppufile.getaint;
         savesize:=sizeof(pint);
      end;


    function tstringdef.getcopy : tstoreddef;
      begin
        result:=tstringdef.create(typ);
        result.typ:=stringdef;
        tstringdef(result).stringtype:=stringtype;
        tstringdef(result).len:=len;
        tstringdef(result).savesize:=savesize;
      end;


    function tstringdef.stringtypname:string;
      const
        typname:array[tstringtype] of string[10]=(
          'shortstr','longstr','ansistr','widestr','unicodestr'
        );
      begin
        stringtypname:=typname[stringtype];
      end;


    procedure tstringdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         if stringtype=st_shortstring then
           begin
{$ifdef extdebug}
            if len > 255 then internalerror(12122002);
{$endif}
            ppufile.putbyte(byte(len))
           end
         else
           ppufile.putaint(len);
         case stringtype of
            st_shortstring : ppufile.writeentry(ibshortstringdef);
            st_longstring : ppufile.writeentry(iblongstringdef);
            st_ansistring : ppufile.writeentry(ibansistringdef);
            st_widestring : ppufile.writeentry(ibwidestringdef);
            st_unicodestring : ppufile.writeentry(ibunicodestringdef);
         end;
      end;


    function tstringdef.needs_inittable : boolean;
      begin
         needs_inittable:=stringtype in [st_ansistring,st_widestring,st_unicodestring];
      end;


    function tstringdef.GetTypeName : string;
      const
         names : array[tstringtype] of string[15] = (
           'ShortString','LongString','AnsiString','WideString','UnicodeString');
      begin
         GetTypeName:=names[stringtype];
      end;


    function tstringdef.getvardef : longint;
      const
        vardef : array[tstringtype] of longint = (
          varUndefined,varUndefined,varString,varOleStr,varUnicodeStr);
      begin
        result:=vardef[stringtype];
      end;


    function tstringdef.alignment : shortint;
      begin
        case stringtype of
          st_unicodestring,
          st_widestring,
          st_ansistring:
            alignment:=size_2_align(savesize);
          st_longstring,
          st_shortstring:
            if (tf_requires_proper_alignment in target_info.flags) then
              { char to string accesses byte 0 and 1 with one word access }
              alignment:=size_2_align(2)
            else
              alignment:=size_2_align(1);
          else
            internalerror(200412301);
        end;
      end;


    function tstringdef.getmangledparaname : string;
      begin
        getmangledparaname:='STRING';
      end;


    function tstringdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;


{****************************************************************************
                                 TENUMDEF
****************************************************************************}

    constructor tenumdef.create;
      begin
         inherited create(enumdef);
         minval:=0;
         maxval:=0;
         calcsavesize;
         has_jumps:=false;
         basedef:=nil;
         firstenum:=nil;
      end;


    constructor tenumdef.create_subrange(_basedef:tenumdef;_min,_max:aint);
      begin
         inherited create(enumdef);
         minval:=_min;
         maxval:=_max;
         basedef:=_basedef;
         calcsavesize;
         has_jumps:=false;
         firstenum:=basedef.firstenum;
         while assigned(firstenum) and (tenumsym(firstenum).value<>minval) do
           firstenum:=tenumsym(firstenum).nextenum;
      end;


    constructor tenumdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(enumdef,ppufile);
         ppufile.getderef(basedefderef);
         minval:=ppufile.getaint;
         maxval:=ppufile.getaint;
         savesize:=ppufile.getaint;
         has_jumps:=false;
         firstenum:=Nil;
      end;


    function tenumdef.getcopy : tstoreddef;
      begin
        if assigned(basedef) then
          result:=tenumdef.create_subrange(basedef,minval,maxval)
        else
          begin
            result:=tenumdef.create;
            tenumdef(result).minval:=minval;
            tenumdef(result).maxval:=maxval;
          end;
        tenumdef(result).has_jumps:=has_jumps;
        tenumdef(result).firstenum:=firstenum;
        tenumdef(result).basedefderef:=basedefderef;
      end;


    procedure tenumdef.calcsavesize;
      begin
        if (current_settings.packenum=8) or (min<low(longint)) or (int64(max)>high(cardinal)) then
         savesize:=8
        else
         if (current_settings.packenum=4) or (min<low(smallint)) or (max>high(word)) then
          savesize:=4
        else
         if (current_settings.packenum=2) or (min<low(shortint)) or (max>high(byte)) then
          savesize:=2
        else
         savesize:=1;
      end;


    function tenumdef.packedbitsize: aint;
      var
        sizeval: tconstexprint;
        power: longint;
      begin
        result := 0;
        if (minval >= 0) and
           (maxval <= 1) then
          result := 1
        else
          begin
            if (minval>=0) then
              sizeval:=maxval
            else
              { don't count 0 twice }
              sizeval:=(cutils.max(-minval,maxval)*2)-1;
            { 256 must become 512 etc. }
            nextpowerof2(sizeval+1,power);
            result := power;
          end;
      end;


    procedure tenumdef.setmax(_max:aint);
      begin
        maxval:=_max;
        calcsavesize;
      end;


    procedure tenumdef.setmin(_min:aint);
      begin
        minval:=_min;
        calcsavesize;
      end;


    function tenumdef.min:aint;
      begin
        min:=minval;
      end;


    function tenumdef.max:aint;
      begin
        max:=maxval;
      end;


    procedure tenumdef.buildderef;
      begin
        inherited buildderef;
        basedefderef.build(basedef);
      end;


    procedure tenumdef.deref;
      begin
        inherited deref;
        basedef:=tenumdef(basedefderef.resolve);
        { restart ordering }
        firstenum:=nil;
      end;


    procedure tenumdef.derefimpl;
      begin
        if assigned(basedef) and
           (firstenum=nil) then
          begin
            firstenum:=basedef.firstenum;
            while assigned(firstenum) and (tenumsym(firstenum).value<>minval) do
              firstenum:=tenumsym(firstenum).nextenum;
          end;
      end;


    procedure tenumdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(basedefderef);
         ppufile.putaint(min);
         ppufile.putaint(max);
         ppufile.putaint(savesize);
         ppufile.writeentry(ibenumdef);
      end;


    function tenumdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;


    function tenumdef.GetTypeName : string;
      begin
         GetTypeName:='<enumeration type>';
      end;


{****************************************************************************
                                 TORDDEF
****************************************************************************}

    constructor torddef.create(t : tordtype;v,b : TConstExprInt);
      begin
         inherited create(orddef);
         low:=v;
         high:=b;
         ordtype:=t;
         setsize;
      end;


    constructor torddef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(orddef,ppufile);
         ordtype:=tordtype(ppufile.getbyte);
         low:=ppufile.getexprint;
         high:=ppufile.getexprint;
         setsize;
      end;


    function torddef.getcopy : tstoreddef;
      begin
         result:=torddef.create(ordtype,low,high);
         result.typ:=orddef;
         torddef(result).low:=low;
         torddef(result).high:=high;
         torddef(result).ordtype:=ordtype;
         torddef(result).savesize:=savesize;
      end;


    function torddef.alignment:shortint;
      begin
        if (target_info.system in [system_i386_darwin,system_arm_darwin]) and
           (ordtype in [s64bit,u64bit]) then
          result := 4
        else
          result := inherited alignment;
      end;


    procedure torddef.setsize;
      const
        sizetbl : array[tordtype] of longint = (
          0,
          1,2,4,8,
          1,2,4,8,
          1,1,2,4,8,
          1,2,8
        );
      begin
        savesize:=sizetbl[ordtype];
      end;


    function torddef.packedbitsize: aint;
      var
        sizeval: tconstexprint;
        power: longint;
      begin
        result := 0;
        if ordtype = uvoid then
          exit;

        if (ordtype = u64bit) or
           ((ordtype = s64bit) and
            ((low <= (system.low(int64) div 2)) or
             (high > (system.high(int64) div 2)))) then
          result := 64
        else if (low >= 0) and
           (high <= 1) then
          result := 1
        else
          begin
            if (low>=0) then
              sizeval:=high
            else
              { don't count 0 twice }
              sizeval:=(cutils.max(-low,high)*2)-1;
            { 256 must become 512 etc. }
            nextpowerof2(sizeval+1,power);
            result := power;
         end;
      end;


    function torddef.getvardef : longint;
      const
        basetype2vardef : array[tordtype] of longint = (
          varUndefined,
          varbyte,varqword,varlongword,varqword,
          varshortint,varsmallint,varinteger,varint64,
          varboolean,varboolean,varboolean,varUndefined,varUndefined,
          varUndefined,varUndefined,varCurrency);
      begin
        result:=basetype2vardef[ordtype];
      end;


    procedure torddef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(ordtype));
         ppufile.putexprint(low);
         ppufile.putexprint(high);
         ppufile.writeentry(iborddef);
      end;


    function torddef.is_publishable : boolean;
      begin
         is_publishable:=(ordtype<>uvoid);
      end;


    function torddef.GetTypeName : string;
      const
        names : array[tordtype] of string[20] = (
          'untyped',
          'Byte','Word','DWord','QWord',
          'ShortInt','SmallInt','LongInt','Int64',
          'Boolean','ByteBool','WordBool','LongBool','QWordBool',
          'Char','WideChar','Currency');

      begin
         GetTypeName:=names[ordtype];
      end;


{****************************************************************************
                                TFLOATDEF
****************************************************************************}

    constructor tfloatdef.create(t : tfloattype);
      begin
         inherited create(floatdef);
         floattype:=t;
         setsize;
      end;


    constructor tfloatdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(floatdef,ppufile);
         floattype:=tfloattype(ppufile.getbyte);
         setsize;
      end;


    function tfloatdef.getcopy : tstoreddef;
      begin
         result:=tfloatdef.create(floattype);
         result.typ:=floatdef;
         tfloatdef(result).savesize:=savesize;
      end;


    function tfloatdef.alignment:shortint;
      begin
        if (target_info.system in [system_i386_darwin,system_arm_darwin]) then
          case floattype of
            s80real : result:=16;
            s64real,
            s64currency,
            s64comp : result:=4;
            else
              result := inherited alignment;
          end
        else
          result := inherited alignment;
      end;


    procedure tfloatdef.setsize;
      begin
         case floattype of
           s32real : savesize:=4;
           s80real : savesize:=10;
           s64real,
           s64currency,
           s64comp : savesize:=8;
         else
           savesize:=0;
         end;
      end;


    function tfloatdef.getvardef : longint;
      const
        floattype2vardef : array[tfloattype] of longint = (
          varSingle,varDouble,varUndefined,
          varUndefined,varCurrency,varUndefined);
      begin
        if (upper(typename)='TDATETIME') and
          assigned(owner) and
          assigned(owner.name) and
          (owner.name^='SYSTEM') then
          result:=varDate
        else
          result:=floattype2vardef[floattype];
      end;


    procedure tfloatdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(floattype));
         ppufile.writeentry(ibfloatdef);
      end;


    function tfloatdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;


    function tfloatdef.GetTypeName : string;
      const
        names : array[tfloattype] of string[20] = (
          'Single','Double','Extended','Comp','Currency','Float128');
      begin
         GetTypeName:=names[floattype];
      end;


{****************************************************************************
                                TFILEDEF
****************************************************************************}

    constructor tfiledef.createtext;
      begin
         inherited create(filedef);
         filetyp:=ft_text;
         typedfiledef:=nil;
         setsize;
      end;


    constructor tfiledef.createuntyped;
      begin
         inherited create(filedef);
         filetyp:=ft_untyped;
         typedfiledef:=nil;
         setsize;
      end;


    constructor tfiledef.createtyped(def:tdef);
      begin
         inherited create(filedef);
         filetyp:=ft_typed;
         typedfiledef:=def;
         setsize;
      end;


    constructor tfiledef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(filedef,ppufile);
         filetyp:=tfiletyp(ppufile.getbyte);
         if filetyp=ft_typed then
           ppufile.getderef(typedfiledefderef)
         else
           typedfiledef:=nil;
         setsize;
      end;


    function tfiledef.getcopy : tstoreddef;
      begin
        case filetyp of
          ft_typed:
            result:=tfiledef.createtyped(typedfiledef);
          ft_untyped:
            result:=tfiledef.createuntyped;
          ft_text:
            result:=tfiledef.createtext;
          else
            internalerror(2004121201);
        end;
      end;


    procedure tfiledef.buildderef;
      begin
        inherited buildderef;
        if filetyp=ft_typed then
          typedfiledefderef.build(typedfiledef);
      end;


    procedure tfiledef.deref;
      begin
        inherited deref;
        if filetyp=ft_typed then
          typedfiledef:=tdef(typedfiledefderef.resolve);
      end;


    procedure tfiledef.setsize;
      begin
{$ifdef cpu64bitaddr}
        case filetyp of
          ft_text :
            if target_info.system in [system_x86_64_win64,system_ia64_win64] then
              savesize:=632{+8}
            else
              savesize:=628{+8};
          ft_typed,
          ft_untyped :
            if target_info.system in [system_x86_64_win64,system_ia64_win64] then
              savesize:=372
            else
              savesize:=368;
        end;
{$else cpu64bitaddr}
        case filetyp of
          ft_text :
            savesize:=592{+4};
          ft_typed,
          ft_untyped :
            savesize:=332;
        end;
{$endif cpu64bitaddr}
      end;


    procedure tfiledef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(filetyp));
         if filetyp=ft_typed then
           ppufile.putderef(typedfiledefderef);
         ppufile.writeentry(ibfiledef);
      end;


    function tfiledef.GetTypeName : string;
      begin
         case filetyp of
           ft_untyped:
             GetTypeName:='File';
           ft_typed:
             GetTypeName:='File Of '+typedfiledef.typename;
           ft_text:
             GetTypeName:='Text'
         end;
      end;


    function tfiledef.getmangledparaname : string;
      begin
         case filetyp of
           ft_untyped:
             getmangledparaname:='FILE';
           ft_typed:
             getmangledparaname:='FILE$OF$'+typedfiledef.mangledparaname;
           ft_text:
             getmangledparaname:='TEXT'
         end;
      end;


{$ifdef support_llvm}
    function tfiledef.llvm_mangledname:string;
      begin
        result:='< ['+ tostr(savesize div 4) + 'x i32] >';
      end;
{$endif support_llvm}

{****************************************************************************
                               TVARIANTDEF
****************************************************************************}

    constructor tvariantdef.create(v : tvarianttype);
      begin
         inherited create(variantdef);
         varianttype:=v;
         setsize;
      end;


    constructor tvariantdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(variantdef,ppufile);
         varianttype:=tvarianttype(ppufile.getbyte);
         setsize;
      end;


    function tvariantdef.getcopy : tstoreddef;
      begin
        result:=tvariantdef.create(varianttype);
      end;


    procedure tvariantdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(varianttype));
         ppufile.writeentry(ibvariantdef);
      end;


    function tvariantdef.getvardef : longint;
      begin
        Result:=varVariant;
      end;


    procedure tvariantdef.setsize;
      begin
{$ifdef cpu64bitaddr}
        savesize:=24;
{$else cpu64bitaddr}
        savesize:=16;
{$endif cpu64bitaddr}
      end;


    function tvariantdef.GetTypeName : string;
      begin
         case varianttype of
           vt_normalvariant:
             GetTypeName:='Variant';
           vt_olevariant:
             GetTypeName:='OleVariant';
         end;
      end;


    function tvariantdef.needs_inittable : boolean;
      begin
         needs_inittable:=true;
      end;


    function tvariantdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;


{$ifdef support_llvm}
    function tvariantdef.llvm_mangledname:string;
      begin
        result:=search_system_type('TVARDATA').typedef.llvm_mangledname;
      end;
{$endif support_llvm}

{****************************************************************************
                            TABSTRACtpointerdef
****************************************************************************}

    constructor tabstractpointerdef.create(dt:tdeftyp;def:tdef);
      begin
        inherited create(dt);
        pointeddef:=def;
        savesize:=sizeof(pint);
      end;


    constructor tabstractpointerdef.ppuload(dt:tdeftyp;ppufile:tcompilerppufile);
      begin
         inherited ppuload(dt,ppufile);
         ppufile.getderef(pointeddefderef);
         savesize:=sizeof(pint);
      end;


    procedure tabstractpointerdef.buildderef;
      begin
        inherited buildderef;
        pointeddefderef.build(pointeddef);
      end;


    procedure tabstractpointerdef.deref;
      begin
        inherited deref;
        pointeddef:=tdef(pointeddefderef.resolve);
      end;


    procedure tabstractpointerdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(pointeddefderef);
      end;


{****************************************************************************
                               tpointerdef
****************************************************************************}

    constructor tpointerdef.create(def:tdef);
      begin
        inherited create(pointerdef,def);
        is_far:=false;
      end;


    constructor tpointerdef.createfar(def:tdef);
      begin
        inherited create(pointerdef,def);
        is_far:=true;
      end;


    constructor tpointerdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(pointerdef,ppufile);
         is_far:=(ppufile.getbyte<>0);
      end;


    function tpointerdef.getcopy : tstoreddef;
      begin
        result:=tpointerdef.create(pointeddef);
        tpointerdef(result).is_far:=is_far;
        tpointerdef(result).savesize:=savesize;
      end;


    procedure tpointerdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(is_far));
         ppufile.writeentry(ibpointerdef);
      end;


    function tpointerdef.GetTypeName : string;
      begin
         if is_far then
          GetTypeName:='^'+pointeddef.typename+';far'
         else
          GetTypeName:='^'+pointeddef.typename;
      end;


{$ifdef support_llvm}
    function tpointerdef.llvm_mangledname:string;
      begin
        if not is_void(pointeddef) then
          result:=pointeddef.llvm_mangledname+'*'
        else
          result:='i8*'
      end;
{$endif support_llvm}


{****************************************************************************
                              TCLASSREFDEF
****************************************************************************}

    constructor tclassrefdef.create(def:tdef);
      begin
         inherited create(classrefdef,def);
      end;


    constructor tclassrefdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(classrefdef,ppufile);
      end;


    procedure tclassrefdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.writeentry(ibclassrefdef);
      end;


    function tclassrefdef.GetTypeName : string;
      begin
         GetTypeName:='Class Of '+pointeddef.typename;
      end;


    function tclassrefdef.is_publishable : boolean;
      begin
         result:=true;
      end;


{$ifdef support_llvm}
    procedure tclassrefdef.set_llvm_name_syms;
      begin
        tobjectdef(pointeddef).set_llvm_name_syms;
        fllvm_name_sym:=tobjectdef(pointeddef).llvm_vmt_name_sym;
        fllvm_pointer_name_sym:=current_asmdata.DefineAsmSymbol(llvm_mangledname+'*',AB_LOCAL,AT_DATA);
      end;
{$endif support_llvm}

{***************************************************************************
                                   TSETDEF
***************************************************************************}

    constructor tsetdef.create(def:tdef;low, high : aint);
      var
        setallocbits: aint;
        packedsavesize: aint;
      begin
         inherited create(setdef);
         elementdef:=def;
         setmax:=high;
         if (current_settings.setalloc=0) then
           begin
             setbase:=0;
             if (high<32) then
               savesize:=Sizeof(longint)
             else if (high<256) then
               savesize:=32
             else
               savesize:=(high+7) div 8
           end
         else
           begin
             setallocbits:=current_settings.setalloc*8;
             setbase:=low and not(setallocbits-1);
             packedsavesize:=current_settings.setalloc*((((high+setallocbits)-setbase)) DIV setallocbits);
             savesize:=packedsavesize;
             if savesize=3 then
               savesize:=4;
           end;
      end;


    constructor tsetdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(setdef,ppufile);
         ppufile.getderef(elementdefderef);
         savesize:=ppufile.getaint;
         setbase:=ppufile.getaint;
         setmax:=ppufile.getaint;
      end;


    function tsetdef.getcopy : tstoreddef;
      begin
        result:=tsetdef.create(elementdef,setbase,setmax);
        { the copy might have been created with a different setalloc setting }
        tsetdef(result).savesize:=savesize;
      end;


    procedure tsetdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(elementdefderef);
         ppufile.putaint(savesize);
         ppufile.putaint(setbase);
         ppufile.putaint(setmax);
         ppufile.writeentry(ibsetdef);
      end;


    procedure tsetdef.buildderef;
      begin
        inherited buildderef;
        elementdefderef.build(elementdef);
      end;


    procedure tsetdef.deref;
      begin
        inherited deref;
        elementdef:=tdef(elementdefderef.resolve);
      end;


    function tsetdef.is_publishable : boolean;
      begin
         is_publishable:=savesize in [1,2,4];
      end;


    function tsetdef.GetTypeName : string;
      begin
         if assigned(elementdef) then
          GetTypeName:='Set Of '+elementdef.typename
         else
          GetTypeName:='Empty Set';
      end;


{***************************************************************************
                                 TFORMALDEF
***************************************************************************}

    constructor tformaldef.create(Atyped:boolean);
      begin
         inherited create(formaldef);
         typed:=Atyped;
         savesize:=0;
      end;


    constructor tformaldef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(formaldef,ppufile);
         typed:=boolean(ppufile.getbyte);
         savesize:=0;
      end;


    procedure tformaldef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(typed));
         ppufile.writeentry(ibformaldef);
      end;


    function tformaldef.GetTypeName : string;
      begin
         if typed then
           GetTypeName:='<Typed formal type>'
         else
           GetTypeName:='<Formal type>';
      end;


{***************************************************************************
                           TARRAYDEF
***************************************************************************}

    constructor tarraydef.create(l,h : aint;def:tdef);
      begin
         inherited create(arraydef);
         lowrange:=l;
         highrange:=h;
         rangedef:=def;
         _elementdef:=nil;
         arrayoptions:=[];
      end;


    constructor tarraydef.create_from_pointer(def:tdef);
      begin
         { use -1 so that the elecount will not overflow }
         self.create(0,high(aint)-1,s32inttype);
         arrayoptions:=[ado_IsConvertedPointer];
         setelementdef(def);
      end;


    constructor tarraydef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(arraydef,ppufile);
         { the addresses are calculated later }
         ppufile.getderef(_elementdefderef);
         ppufile.getderef(rangedefderef);
         lowrange:=ppufile.getaint;
         highrange:=ppufile.getaint;
         ppufile.getsmallset(arrayoptions);
      end;


    function tarraydef.getcopy : tstoreddef;
      begin
        result:=tarraydef.create(lowrange,highrange,rangedef);
        tarraydef(result).arrayoptions:=arrayoptions;
        tarraydef(result)._elementdef:=_elementdef;
      end;


    procedure tarraydef.buildderef;
      begin
        inherited buildderef;
        _elementdefderef.build(_elementdef);
        rangedefderef.build(rangedef);
      end;


    procedure tarraydef.deref;
      begin
        inherited deref;
        _elementdef:=tdef(_elementdefderef.resolve);
        rangedef:=tdef(rangedefderef.resolve);
      end;


    procedure tarraydef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(_elementdefderef);
         ppufile.putderef(rangedefderef);
         ppufile.putaint(lowrange);
         ppufile.putaint(highrange);
         ppufile.putsmallset(arrayoptions);
         ppufile.writeentry(ibarraydef);
      end;


    function tarraydef.elesize : aint;
      begin
        if (ado_IsBitPacked in arrayoptions) then
          internalerror(2006080101);
        if assigned(_elementdef) then
          result:=_elementdef.size
        else
          result:=0;
      end;


    function tarraydef.elepackedbitsize : aint;
      begin
        if not(ado_IsBitPacked in arrayoptions) then
          internalerror(2006080102);
	if assigned(_elementdef) then
          result:=_elementdef.packedbitsize
	else
	  result:=0;
      end;


    function tarraydef.elecount : aword;
      var
        qhigh,qlow : qword;
      begin
        if ado_IsDynamicArray in arrayoptions then
          begin
            result:=0;
            exit;
          end;
        if (highrange>0) and (lowrange<0) then
          begin
            qhigh:=highrange;
            qlow:=qword(-lowrange);
            { prevent overflow, return 0 to indicate overflow }
            if qhigh+qlow>qword(high(aint)-1) then
              result:=0
            else
              result:=qhigh+qlow+1;
          end
        else
          result:=int64(highrange)-lowrange+1;
      end;


    function tarraydef.size : aint;
      var
        cachedelecount : aword;
        cachedelesize : aint;
      begin
        if ado_IsDynamicArray in arrayoptions then
          begin
            size:=sizeof(pint);
            exit;
          end;

        { Tarraydef.size may never be called for an open array! }
        if highrange<lowrange then
          internalerror(99080501);
        if not (ado_IsBitPacked in arrayoptions) then
          cachedelesize:=elesize
        else
          cachedelesize := elepackedbitsize;
        cachedelecount:=elecount;

        if (cachedelesize = 0) then
          begin
            size := 0;
            exit;
          end;

        if (cachedelecount = 0) then
          begin
            size := -1;
            exit;
          end;

        { prevent overflow, return -1 to indicate overflow }
        { also make sure we don't need 64/128 bit arithmetic to calculate offsets }
        if (cachedelecount > high(aint)) or
           ((high(aint) div cachedelesize) < aint(cachedelecount)) or
           { also lowrange*elesize must be < high(aint) to prevent overflow when
             accessing the array, see ncgmem (PFV) }
           ((high(aint) div cachedelesize) < abs(lowrange)) then
          begin
            result:=-1;
            exit;
          end;

        if (ado_IsBitPacked in arrayoptions) then
          size:=(cachedelesize * aint(cachedelecount) + 7) div 8
        else
          result:=cachedelesize*aint(cachedelecount);
      end;


    procedure tarraydef.setelementdef(def:tdef);
      begin
        _elementdef:=def;
        if not(
               (ado_IsDynamicArray in arrayoptions) or
               (ado_IsConvertedPointer in arrayoptions) or
               (highrange<lowrange)
	      ) and
           (size=-1) then
          Message(sym_e_segment_too_large);
      end;


    function tarraydef.alignment : shortint;
      begin
         { alignment of dyn. arrays doesn't depend on the element size }
         if (ado_IsDynamicArray in arrayoptions) then
           alignment:=size_2_align(sizeof(pint))
         { alignment is the size of the elements }
         else if (elementdef.typ in [arraydef,recorddef]) or
           ((elementdef.typ=objectdef) and
             is_object(elementdef)) then
           alignment:=elementdef.alignment
         else if not (ado_IsBitPacked in arrayoptions) then
           alignment:=size_2_align(elesize)
         else
           alignment:=packedbitsloadsize(elepackedbitsize);
      end;


    function tarraydef.needs_inittable : boolean;
      begin
         needs_inittable:=(ado_IsDynamicArray in arrayoptions) or elementdef.needs_inittable;
      end;


    function tarraydef.GetTypeName : string;
      begin
         if (ado_IsConstString in arrayoptions) then
           result:='Constant String'
         else if (ado_isarrayofconst in arrayoptions) or
                 (ado_isConstructor in arrayoptions) then
           begin
             if (ado_isvariant in arrayoptions) or ((highrange=-1) and (lowrange=0)) then
               GetTypeName:='Array Of Const'
             else
               GetTypeName:='Array Of Const/Constant Open Array of '+elementdef.typename;
           end
         else if (ado_IsDynamicArray in arrayoptions) then
           GetTypeName:='Dynamic Array Of '+elementdef.typename
         else if ((highrange=-1) and (lowrange=0)) then
           GetTypeName:='Open Array Of '+elementdef.typename
         else
           begin
              result := '';
              if (ado_IsBitPacked in arrayoptions) then
                result:='Packed ';
              if rangedef.typ=enumdef then
                result:=result+'Array['+rangedef.typename+'] Of '+elementdef.typename
              else
                result:=result+'Array['+tostr(lowrange)+'..'+
                  tostr(highrange)+'] Of '+elementdef.typename
           end;
      end;


    function tarraydef.getmangledparaname : string;
      begin
         if ado_isarrayofconst in arrayoptions then
          getmangledparaname:='array_of_const'
         else
          if ((highrange=-1) and (lowrange=0)) then
           getmangledparaname:='array_of_'+elementdef.mangledparaname
         else
          internalerror(200204176);
      end;


    function tarraydef.is_publishable : boolean;
      begin
        Result:=ado_IsDynamicArray in arrayoptions;
      end;

{***************************************************************************
                              tabstractrecorddef
***************************************************************************}

    function tabstractrecorddef.GetSymtable(t:tGetSymtable):TSymtable;
      begin
         if t=gs_record then
         GetSymtable:=symtable
        else
         GetSymtable:=nil;
      end;


    procedure tabstractrecorddef.reset;
      begin
        inherited reset;
        tstoredsymtable(symtable).reset_all_defs;
      end;


    function tabstractrecorddef.is_packed:boolean;
      begin
        result:=tabstractrecordsymtable(symtable).is_packed;
      end;


{***************************************************************************
                                  trecorddef
***************************************************************************}

    constructor trecorddef.create(p : TSymtable);
      begin
         inherited create(recorddef);
         symtable:=p;
         { we can own the symtable only if nobody else owns a copy so far }
         if symtable.refcount=1 then
           symtable.defowner:=self;
         isunion:=false;
      end;


    constructor trecorddef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(recorddef,ppufile);
         if df_copied_def in defoptions then
           ppufile.getderef(cloneddefderef)
         else
           begin
             symtable:=trecordsymtable.create(0);
             trecordsymtable(symtable).fieldalignment:=shortint(ppufile.getbyte);
             trecordsymtable(symtable).recordalignment:=shortint(ppufile.getbyte);
             trecordsymtable(symtable).padalignment:=shortint(ppufile.getbyte);
             trecordsymtable(symtable).usefieldalignment:=shortint(ppufile.getbyte);
             trecordsymtable(symtable).datasize:=ppufile.getaint;
             trecordsymtable(symtable).ppuload(ppufile);
             { requires usefieldalignment to be set }
             symtable.defowner:=self;
           end;
         isunion:=false;
      end;


    destructor trecorddef.destroy;
      begin
         if assigned(symtable) then
           begin
             symtable.free;
             symtable:=nil;
           end;
         inherited destroy;
      end;


    function trecorddef.getcopy : tstoreddef;
      begin
        result:=trecorddef.create(symtable.getcopy);
        trecorddef(result).isunion:=isunion;
        include(trecorddef(result).defoptions,df_copied_def);
      end;


    function trecorddef.needs_inittable : boolean;
      begin
        needs_inittable:=trecordsymtable(symtable).needs_init_final
      end;


    procedure trecorddef.buildderef;
      begin
         inherited buildderef;
         if df_copied_def in defoptions then
           cloneddefderef.build(symtable.defowner)
         else
           tstoredsymtable(symtable).buildderef;
      end;


    procedure trecorddef.deref;
      begin
         inherited deref;
         { now dereference the definitions }
         if df_copied_def in defoptions then
           begin
             cloneddef:=trecorddef(cloneddefderef.resolve);
             symtable:=cloneddef.symtable.getcopy;
           end
         else
           tstoredsymtable(symtable).deref;
         { assign TGUID? load only from system unit }
         if not(assigned(rec_tguid)) and
            (upper(typename)='TGUID') and
            assigned(owner) and
            assigned(owner.name) and
            (owner.name^='SYSTEM') then
           rec_tguid:=self;
      end;


    procedure trecorddef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         if df_copied_def in defoptions then
           ppufile.putderef(cloneddefderef)
         else
           begin
             ppufile.putbyte(byte(trecordsymtable(symtable).fieldalignment));
             ppufile.putbyte(byte(trecordsymtable(symtable).recordalignment));
             ppufile.putbyte(byte(trecordsymtable(symtable).padalignment));
             ppufile.putbyte(byte(trecordsymtable(symtable).usefieldalignment));
             ppufile.putaint(trecordsymtable(symtable).datasize);
           end;

         ppufile.writeentry(ibrecorddef);

         if not(df_copied_def in defoptions) then
           trecordsymtable(symtable).ppuwrite(ppufile);
      end;


    function trecorddef.size:aint;
      begin
        result:=trecordsymtable(symtable).datasize;
      end;


    function trecorddef.alignment:shortint;
      begin
        alignment:=trecordsymtable(symtable).recordalignment;
      end;


    function trecorddef.padalignment:shortint;
      begin
        padalignment := trecordsymtable(symtable).padalignment;
      end;


    function trecorddef.GetTypeName : string;
      begin
         GetTypeName:='<record type>'
      end;


{***************************************************************************
                       TABSTRACTPROCDEF
***************************************************************************}

    constructor tabstractprocdef.create(dt:tdeftyp;level:byte);
      begin
         inherited create(dt);
         parast:=tparasymtable.create(self,level);
         paras:=nil;
         minparacount:=0;
         maxparacount:=0;
         proctypeoption:=potype_none;
         proccalloption:=pocall_none;
         procoptions:=[];
         returndef:=voidtype;
         savesize:=sizeof(pint);
         requiredargarea:=0;
         has_paraloc_info:=false;
         location_reset(funcretloc[callerside],LOC_INVALID,OS_NO);
         location_reset(funcretloc[calleeside],LOC_INVALID,OS_NO);
      end;


    destructor tabstractprocdef.destroy;
      begin
         if assigned(paras) then
           begin
{$ifdef MEMDEBUG}
             memprocpara.start;
{$endif MEMDEBUG}
             paras.free;
             paras:=nil;
{$ifdef MEMDEBUG}
             memprocpara.stop;
{$endif MEMDEBUG}
          end;
         if assigned(parast) then
          begin
{$ifdef MEMDEBUG}
            memprocparast.start;
{$endif MEMDEBUG}
            parast.free;
            parast:=nil;
{$ifdef MEMDEBUG}
            memprocparast.stop;
{$endif MEMDEBUG}
          end;
         inherited destroy;
      end;


    procedure tabstractprocdef.count_para(p:TObject;arg:pointer);
      begin
        if (tsym(p).typ<>paravarsym) then
          exit;
        inc(plongint(arg)^);
        if not(vo_is_hidden_para in tparavarsym(p).varoptions) then
         begin
           if not assigned(tparavarsym(p).defaultconstsym) then
             inc(minparacount);
           inc(maxparacount);
         end;
      end;


    procedure tabstractprocdef.insert_para(p:TObject;arg:pointer);
      begin
        if (tsym(p).typ<>paravarsym) then
          exit;
        paras.add(p);
      end;


    procedure tabstractprocdef.calcparas;
      var
        paracount : longint;
      begin
        { This can already be assigned when
          we need to reresolve this unit (PFV) }
        if assigned(paras) then
          paras.free;
        paras:=tparalist.create(false);
        paracount:=0;
        minparacount:=0;
        maxparacount:=0;
        parast.SymList.ForEachCall(@count_para,@paracount);
        paras.capacity:=paracount;
        { Insert parameters in table }
        parast.SymList.ForEachCall(@insert_para,nil);
        { Order parameters }
        paras.sortparas;
      end;


    procedure tabstractprocdef.buildderef;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;
         inherited buildderef;
         returndefderef.build(returndef);
         { parast }
         tparasymtable(parast).buildderef;
      end;


    procedure tabstractprocdef.deref;
      begin
         inherited deref;
         returndef:=tdef(returndefderef.resolve);
         { parast }
         tparasymtable(parast).deref;
         { recalculated parameters }
         calcparas;
      end;


    constructor tabstractprocdef.ppuload(dt:tdeftyp;ppufile:tcompilerppufile);
      var
        b : byte;
      begin
         inherited ppuload(dt,ppufile);
         parast:=nil;
         Paras:=nil;
         minparacount:=0;
         maxparacount:=0;
         ppufile.getderef(returndefderef);
{ TODO: remove fpu_used loading}
         ppufile.getbyte;
         proctypeoption:=tproctypeoption(ppufile.getbyte);
         proccalloption:=tproccalloption(ppufile.getbyte);
         ppufile.getnormalset(procoptions);

         location_reset(funcretloc[callerside],LOC_INVALID,OS_NO);
         location_reset(funcretloc[calleeside],LOC_INVALID,OS_NO);
         if po_explicitparaloc in procoptions then
           begin
             b:=ppufile.getbyte;
             if b<>sizeof(funcretloc[callerside]) then
               internalerror(200411154);
             ppufile.getdata(funcretloc[callerside],sizeof(funcretloc[callerside]));
           end;

         savesize:=sizeof(pint);
         has_paraloc_info:=(po_explicitparaloc in procoptions);
      end;


    procedure tabstractprocdef.ppuwrite(ppufile:tcompilerppufile);
      var
        oldintfcrc : boolean;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;
         inherited ppuwrite(ppufile);
         ppufile.putderef(returndefderef);
         oldintfcrc:=ppufile.do_interface_crc;
         ppufile.do_interface_crc:=false;
         ppufile.putbyte(0);
         ppufile.putbyte(ord(proctypeoption));
         ppufile.putbyte(ord(proccalloption));
         ppufile.putnormalset(procoptions);
         ppufile.do_interface_crc:=oldintfcrc;

         if (po_explicitparaloc in procoptions) then
           begin
             { Make a 'valid' funcretloc for procedures }
             ppufile.putbyte(sizeof(funcretloc[callerside]));
             ppufile.putdata(funcretloc[callerside],sizeof(funcretloc[callerside]));
           end;
      end;


    function tabstractprocdef.typename_paras(showhidden:boolean) : string;
      var
        hs,s  : string;
        hp    : TParavarsym;
        hpc   : tconstsym;
        first : boolean;
        i     : integer;
      begin
        s:='';
        first:=true;
        for i:=0 to paras.count-1 do
         begin
           hp:=tparavarsym(paras[i]);
           if not(vo_is_hidden_para in hp.varoptions) or
              (showhidden) then
            begin
               if first then
                begin
                  s:=s+'(';
                  first:=false;
                end
               else
                s:=s+',';
               if vo_is_hidden_para in hp.varoptions then
                 s:=s+'<';
               case hp.varspez of
                 vs_var :
                   s:=s+'var ';
                 vs_const :
                   s:=s+'const ';
                 vs_out :
                   s:=s+'out ';
               end;
               if assigned(hp.vardef.typesym) then
                 begin
                   hs:=hp.vardef.typesym.realname;
                   if hs[1]<>'$' then
                     s:=s+hs
                   else
                     s:=s+hp.vardef.GetTypeName;
                 end
               else
                 s:=s+hp.vardef.GetTypeName;
               { default value }
               if assigned(hp.defaultconstsym) then
                begin
                  hpc:=tconstsym(hp.defaultconstsym);
                  hs:='';
                  case hpc.consttyp of
                    conststring,
                    constresourcestring :
                      begin
                      If hpc.value.len>0 then
                        begin
                        setLength(hs,hpc.value.len);
                        move(hpc.value.valueptr^,hs[1],hpc.value.len);
                        end;
                      end;
                    constreal :
                      str(pbestreal(hpc.value.valueptr)^,hs);
                    constpointer :
                      hs:=tostr(hpc.value.valueordptr);
                    constord :
                      begin
                        if is_boolean(hpc.constdef) then
                          begin
                            if hpc.value.valueord<>0 then
                             hs:='TRUE'
                            else
                             hs:='FALSE';
                          end
                        else
                          hs:=tostr(hpc.value.valueord);
                      end;
                    constnil :
                      hs:='nil';
                    constset :
                      hs:='<set>';
                  end;
                  if hs<>'' then
                   s:=s+'="'+hs+'"';
                end;
               if vo_is_hidden_para in hp.varoptions then
                 s:=s+'>';
             end;
         end;
        if not first then
         s:=s+')';
        if (po_varargs in procoptions) then
         s:=s+';VarArgs';
        typename_paras:=s;
      end;


    function tabstractprocdef.is_methodpointer:boolean;
      begin
        result:=false;
      end;


    function tabstractprocdef.is_addressonly:boolean;
      begin
        result:=true;
      end;


{***************************************************************************
                                  TPROCDEF
***************************************************************************}

    constructor tprocdef.create(level:byte);
      begin
         inherited create(procdef,level);
         localst:=tlocalsymtable.create(self,parast.symtablelevel);
         _mangledname:=nil;
         fileinfo:=current_filepos;
         extnumber:=$ffff;
         aliasnames:=TCmdStrList.create;
         funcretsym:=nil;
         forwarddef:=true;
         interfacedef:=false;
         hasforward:=false;
         _class := nil;
         import_dll:=nil;
         import_name:=nil;
         import_nr:=0;
         inlininginfo:=nil;
{$ifdef i386}
          fpu_used:=maxfpuregs;
{$endif i386}
      end;


    constructor tprocdef.ppuload(ppufile:tcompilerppufile);
      var
        i,aliasnamescount : longint;
        level : byte;
      begin
         inherited ppuload(procdef,ppufile);
         if po_has_mangledname in procoptions then
          _mangledname:=stringdup(ppufile.getstring)
         else
          _mangledname:=nil;
         extnumber:=ppufile.getword;
         level:=ppufile.getbyte;
         ppufile.getderef(_classderef);
         ppufile.getderef(procsymderef);
         ppufile.getposinfo(fileinfo);
         visibility:=tvisibility(ppufile.getbyte);
         ppufile.getsmallset(symoptions);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         ppufile.getderef(libsymderef);
{$endif powerpc}
         { import stuff }
         if po_has_importdll in procoptions then
           import_dll:=stringdup(ppufile.getstring)
         else
           import_dll:=nil;
         if po_has_importname in procoptions then
           import_name:=stringdup(ppufile.getstring)
         else
           import_name:=nil;
         import_nr:=ppufile.getword;
         if (po_msgint in procoptions) then
           messageinf.i:=ppufile.getlongint;
         if (po_msgstr in procoptions) then
           messageinf.str:=stringdup(ppufile.getstring);
         if (po_dispid in procoptions) then
           dispid:=ppufile.getlongint;
         { inline stuff }
         if (po_has_inlininginfo in procoptions) then
           begin
             ppufile.getderef(funcretsymderef);
             new(inlininginfo);
             ppufile.getsmallset(inlininginfo^.flags);
           end
         else
           begin
             inlininginfo:=nil;
             funcretsym:=nil;
           end;

         aliasnames:=TCmdStrList.create;
         { count alias names }
         aliasnamescount:=ppufile.getbyte;
         for i:=1 to aliasnamescount do
           aliasnames.insert(ppufile.getstring);

         { load para symtable }
         parast:=tparasymtable.create(self,level);
         tparasymtable(parast).ppuload(ppufile);
         { load local symtable }
         if (po_has_inlininginfo in procoptions) then
          begin
            localst:=tlocalsymtable.create(self,level);
            tlocalsymtable(localst).ppuload(ppufile);
          end
         else
          localst:=nil;
         { inline stuff }
         if (po_has_inlininginfo in procoptions) then
           inlininginfo^.code:=ppuloadnodetree(ppufile);
         { default values for no persistent data }
         if (cs_link_deffile in current_settings.globalswitches) and
            (tf_need_export in target_info.flags) and
            (po_exports in procoptions) then
           deffile.AddExport(mangledname);
         forwarddef:=false;
         interfacedef:=false;
         hasforward:=false;
         { Disable po_has_inlining until the derefimpl is done }
         exclude(procoptions,po_has_inlininginfo);
{$ifdef i386}
         fpu_used:=maxfpuregs;
{$endif i386}
      end;


    destructor tprocdef.destroy;
      begin
         aliasnames.free;
         aliasnames:=nil;
         if assigned(localst) and
           (localst.symtabletype<>staticsymtable) then
          begin
{$ifdef MEMDEBUG}
            memproclocalst.start;
{$endif MEMDEBUG}
            localst.free;
            localst:=nil;
{$ifdef MEMDEBUG}
            memproclocalst.start;
{$endif MEMDEBUG}
          end;
         if assigned(inlininginfo) then
          begin
{$ifdef MEMDEBUG}
            memprocnodetree.start;
{$endif MEMDEBUG}
            tnode(inlininginfo^.code).free;
{$ifdef MEMDEBUG}
            memprocnodetree.start;
{$endif MEMDEBUG}
            dispose(inlininginfo);
            inlininginfo:=nil;
          end;
         stringdispose(resultname);
         stringdispose(import_dll);
         stringdispose(import_name);
         if (po_msgstr in procoptions) then
           stringdispose(messageinf.str);
         if assigned(_mangledname) then
          begin
{$ifdef MEMDEBUG}
            memmanglednames.start;
{$endif MEMDEBUG}
            stringdispose(_mangledname);
{$ifdef MEMDEBUG}
            memmanglednames.stop;
{$endif MEMDEBUG}
          end;
         inherited destroy;
      end;


    procedure tprocdef.ppuwrite(ppufile:tcompilerppufile);
      var
        oldintfcrc : boolean;
        aliasnamescount : longint;
        item : TCmdStrListItem;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;

         inherited ppuwrite(ppufile);
         if po_has_mangledname in procoptions then
          ppufile.putstring(_mangledname^);

         ppufile.putword(extnumber);
         ppufile.putbyte(parast.symtablelevel);
         ppufile.putderef(_classderef);
         ppufile.putderef(procsymderef);
         ppufile.putposinfo(fileinfo);
         ppufile.putbyte(byte(visibility));
         ppufile.putsmallset(symoptions);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         ppufile.putderef(libsymderef);
{$endif powerpc}
         { import }
         if po_has_importdll in procoptions then
           ppufile.putstring(import_dll^);
         if po_has_importname in procoptions then
           ppufile.putstring(import_name^);
         ppufile.putword(import_nr);
         if (po_msgint in procoptions) then
           ppufile.putlongint(messageinf.i);
         if (po_msgstr in procoptions) then
           ppufile.putstring(messageinf.str^);
         if (po_dispid in procoptions) then
           ppufile.putlongint(dispid);
         { inline stuff }
         oldintfcrc:=ppufile.do_crc;
         ppufile.do_crc:=false;
         if (po_has_inlininginfo in procoptions) then
           begin
             ppufile.putderef(funcretsymderef);
             ppufile.putsmallset(inlininginfo^.flags);
           end;

         { count alias names }
         aliasnamescount:=0;
         item:=TCmdStrListItem(aliasnames.first);
         while assigned(item) do
           begin
             inc(aliasnamescount);
             item:=TCmdStrListItem(item.next);
           end;
         if aliasnamescount>255 then
           internalerror(200711021);
         ppufile.putbyte(aliasnamescount);
         item:=TCmdStrListItem(aliasnames.first);
         while assigned(item) do
          begin
            ppufile.putstring(item.str);
            item:=TCmdStrListItem(item.next);
          end;

         ppufile.do_crc:=oldintfcrc;

         { write this entry }
         ppufile.writeentry(ibprocdef);

         { Save the para symtable, this is taken from the interface }
         tparasymtable(parast).ppuwrite(ppufile);

         { save localsymtable for inline procedures or when local
           browser info is requested, this has no influence on the crc }
         if (po_has_inlininginfo in procoptions) then
          begin
            oldintfcrc:=ppufile.do_crc;
            ppufile.do_crc:=false;
            tlocalsymtable(localst).ppuwrite(ppufile);
            ppufile.do_crc:=oldintfcrc;
          end;

         { node tree for inlining }
         oldintfcrc:=ppufile.do_crc;
         ppufile.do_crc:=false;
         if (po_has_inlininginfo in procoptions) then
           ppuwritenodetree(ppufile,inlininginfo^.code);
         ppufile.do_crc:=oldintfcrc;
      end;


    procedure tprocdef.reset;
      begin
        inherited reset;
        procstarttai:=nil;
        procendtai:=nil;
      end;


    function tprocdef.fullprocname(showhidden:boolean):string;
      var
        s : string;
        t : ttoken;
      begin
{$ifdef EXTDEBUG}
        showhidden:=true;
{$endif EXTDEBUG}
        s:='';
        if owner.symtabletype=localsymtable then
         s:=s+'local ';
        if assigned(_class) then
         begin
           if po_classmethod in procoptions then
            s:=s+'class ';
           s:=s+_class.objrealname^+'.';
         end;
        if proctypeoption=potype_operator then
          begin
            for t:=NOTOKEN to last_overloaded do
              if procsym.realname='$'+overloaded_names[t] then
                begin
                  s:='operator '+arraytokeninfo[t].str+typename_paras(showhidden);
                  break;
                end;
          end
        else
          s:=s+procsym.realname+typename_paras(showhidden);
        case proctypeoption of
          potype_constructor:
            s:='constructor '+s;
          potype_destructor:
            s:='destructor '+s;
          else
            if assigned(returndef) and
              not(is_void(returndef)) then
              s:=s+':'+returndef.GetTypeName;
        end;
        s:=s+';';
        { forced calling convention? }
        if (po_hascallingconvention in procoptions) then
          s:=s+' '+ProcCallOptionStr[proccalloption]+';';
        if po_staticmethod in procoptions then
          s:=s+' Static;';
        fullprocname:=s;
      end;


    function tprocdef.is_methodpointer:boolean;
      begin
        result:=assigned(_class);
      end;


    function tprocdef.is_addressonly:boolean;
      begin
        result:=assigned(owner) and
                (owner.symtabletype<>ObjectSymtable);
      end;


    function tprocdef.GetSymtable(t:tGetSymtable):TSymtable;
      begin
        case t of
          gs_local :
            GetSymtable:=localst;
          gs_para :
            GetSymtable:=parast;
          else
            GetSymtable:=nil;
        end;
      end;


    procedure tprocdef.buildderef;
      begin
         inherited buildderef;
         _classderef.build(_class);
         { procsym that originaly defined this definition, should be in the
           same symtable }
         procsymderef.build(procsym);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         libsymderef.build(libsym);
{$endif powerpc}
      end;


    procedure tprocdef.buildderefimpl;
      begin
         inherited buildderefimpl;

         { Localst is not available for main/unit init }
         if assigned(localst) then
           begin
             tlocalsymtable(localst).buildderef;
             tlocalsymtable(localst).buildderefimpl;
           end;

         { inline tree }
         if (po_has_inlininginfo in procoptions) then
           begin
             funcretsymderef.build(funcretsym);
             inlininginfo^.code.buildderefimpl;
           end;
      end;


    procedure tprocdef.deref;
      begin
         inherited deref;
         _class:=tobjectdef(_classderef.resolve);
         { procsym that originaly defined this definition, should be in the
           same symtable }
         procsym:=tprocsym(procsymderef.resolve);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         libsym:=tsym(libsymderef.resolve);
{$endif powerpc}
      end;


    procedure tprocdef.derefimpl;
      begin
         { Enable has_inlininginfo when the inlininginfo
           structure is available. The has_inlininginfo was disabled
           after the load, since the data was invalid }
         if assigned(inlininginfo) then
           include(procoptions,po_has_inlininginfo);

         { Locals }
         if assigned(localst) then
           begin
             tlocalsymtable(localst).deref;
             tlocalsymtable(localst).derefimpl;
           end;

        { Inline }
        if (po_has_inlininginfo in procoptions) then
          begin
            inlininginfo^.code.derefimpl;
            { funcretsym, this is always located in the localst }
            funcretsym:=tsym(funcretsymderef.resolve);
          end
        else
          begin
            { safety }
            funcretsym:=nil;
          end;
      end;


    function tprocdef.GetTypeName : string;
      begin
         GetTypeName := FullProcName(false);
      end;


    function tprocdef.mangledname : string;
      var
        hp   : TParavarsym;
        hs   : string;
        crc  : dword;
        newlen,
        oldlen,
        i    : integer;
      begin
        if assigned(_mangledname) then
         begin
         {$ifdef compress}
           mangledname:=minilzw_decode(_mangledname^);
         {$else}
           mangledname:=_mangledname^;
         {$endif}
           exit;
         end;
        { we need to use the symtable where the procsym is inserted,
          because that is visible to the world }
        mangledname:=make_mangledname('',procsym.owner,procsym.name);
        oldlen:=length(mangledname);
        { add parameter types }
        for i:=0 to paras.count-1 do
         begin
           hp:=tparavarsym(paras[i]);
           if not(vo_is_hidden_para in hp.varoptions) then
             mangledname:=mangledname+'$'+hp.vardef.mangledparaname;
         end;
        { add resultdef, add $$ as separator to make it unique from a
          parameter separator }
        if not is_void(returndef) then
          mangledname:=mangledname+'$$'+returndef.mangledparaname;
        newlen:=length(mangledname);
        { Replace with CRC if the parameter line is very long }
        if (newlen-oldlen>12) and
           ((newlen>128) or (newlen-oldlen>64)) then
          begin
            crc:=0;
            for i:=0 to paras.count-1 do
              begin
                hp:=tparavarsym(paras[i]);
                if not(vo_is_hidden_para in hp.varoptions) then
                  begin
                    hs:=hp.vardef.mangledparaname;
                    crc:=UpdateCrc32(crc,hs[1],length(hs));
                  end;
              end;
            hs:=hp.vardef.mangledparaname;
            crc:=UpdateCrc32(crc,hs[1],length(hs));
            mangledname:=Copy(mangledname,1,oldlen)+'$crc'+hexstr(crc,8);
          end;
       {$ifdef compress}
        _mangledname:=stringdup(minilzw_encode(mangledname));
       {$else}
        _mangledname:=stringdup(mangledname);
       {$endif}
      end;


    function tprocdef.cplusplusmangledname : string;

      function getcppparaname(p : tdef) : string;

        const
           ordtype2str : array[tordtype] of string[2] = (
             '',
             'Uc','Us','Ui','Us',
             'Sc','s','i','x',
             'b','b','b','b','b',
             'c','w','x');

        var
           s : string;

        begin
           case p.typ of
              orddef:
                s:=ordtype2str[torddef(p).ordtype];
              pointerdef:
                s:='P'+getcppparaname(tpointerdef(p).pointeddef);
              else
                internalerror(2103001);
           end;
           getcppparaname:=s;
        end;

      var
         s,s2 : string;
         hp   : TParavarsym;
         i    : integer;

      begin
        { outdated gcc 2.x name mangling scheme }
{$ifdef NAMEMANGLING_GCC2}

         s := procsym.realname;
         if procsym.owner.symtabletype=ObjectSymtable then
           begin
              s2:=upper(tobjectdef(procsym.owner.defowner).objrealname^);
              case proctypeoption of
                 potype_destructor:
                   s:='_$_'+tostr(length(s2))+s2;
                 potype_constructor:
                   s:='___'+tostr(length(s2))+s2;
                 else
                   s:='_'+s+'__'+tostr(length(s2))+s2;
              end;

           end
         else s:=s+'__';

         s:=s+'F';

         { concat modifiers }
         { !!!!! }

         { now we handle the parameters }
         if maxparacount>0 then
           begin
             for i:=0 to paras.count-1 do
               begin
                 hp:=tparavarsym(paras[i]);
                 s2:=getcppparaname(hp.vardef);
                 if hp.varspez in [vs_var,vs_out] then
                   s2:='R'+s2;
                 s:=s+s2;
               end;
           end
         else
           s:=s+'v';
         cplusplusmangledname:=s;
{$endif NAMEMANGLING_GCC2}

         { gcc 3.x name mangling scheme }
         if procsym.owner.symtabletype=ObjectSymtable then
           begin
             s:='_ZN';

             s2:=tobjectdef(procsym.owner.defowner).objrealname^;
             s:=s+tostr(length(s2))+s2;
             case proctypeoption of
                potype_constructor:
                  s:=s+'C1';
                potype_destructor:
                  s:=s+'D1';
                else
                  s:=s+tostr(length(procsym.realname))+procsym.realname;
             end;

             s:=s+'E';
           end
         else
           s:=procsym.realname;

         { now we handle the parameters }
         if maxparacount>0 then
           begin
             for i:=0 to paras.count-1 do
               begin
                 hp:=tparavarsym(paras[i]);
                 s2:=getcppparaname(hp.vardef);
                 if hp.varspez in [vs_var,vs_out] then
                   s2:='R'+s2;
                 s:=s+s2;
               end;
           end
         else
           s:=s+'v';
         cplusplusmangledname:=s;
      end;


    procedure tprocdef.setmangledname(const s : string);
      begin
        { This is not allowed anymore, the forward declaration
          already needs to create the correct mangledname, no changes
          afterwards are allowed (PFV) }
        { Exception: interface definitions in mode macpas, since in that }
        {   case no reference to the old name can exist yet (JM)         }
        if assigned(_mangledname) then
          if ((m_mac in current_settings.modeswitches) and
              (interfacedef)) then
            stringdispose(_mangledname)
          else
            internalerror(200411171);
      {$ifdef compress}
        _mangledname:=stringdup(minilzw_encode(s));
      {$else}
        _mangledname:=stringdup(s);
      {$endif}
        include(procoptions,po_has_mangledname);
      end;


{***************************************************************************
                                 TPROCVARDEF
***************************************************************************}

    constructor tprocvardef.create(level:byte);
      begin
         inherited create(procvardef,level);
      end;


    constructor tprocvardef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(procvardef,ppufile);
         { load para symtable }
         parast:=tparasymtable.create(self,unknown_level);
         tparasymtable(parast).ppuload(ppufile);
      end;


    function tprocvardef.getcopy : tstoreddef;
      var
        i : tcallercallee;
        j : longint;
      begin
        result:=tprocvardef.create(parast.symtablelevel);
        tprocvardef(result).returndef:=returndef;
        tprocvardef(result).returndefderef:=returndefderef;
        tprocvardef(result).parast:=parast.getcopy;
        tprocvardef(result).savesize:=savesize;

        { create paralist copy }
        tprocvardef(result).paras:=tparalist.create(false);
        tprocvardef(result).paras.count:=paras.count;
        for j:=0 to paras.count-1 do
          tprocvardef(result).paras[j]:=paras[j];

        tprocvardef(result).proctypeoption:=proctypeoption;
        tprocvardef(result).proccalloption:=proccalloption;
        tprocvardef(result).procoptions:=procoptions;
        tprocvardef(result).requiredargarea:=requiredargarea;
        tprocvardef(result).maxparacount:=maxparacount;
        tprocvardef(result).minparacount:=minparacount;
        for i:=low(tcallercallee) to high(tcallercallee) do
          location_copy(tprocvardef(result).funcretloc[i],funcretloc[i]);
        tprocvardef(result).has_paraloc_info:=has_paraloc_info;
{$ifdef m68k}
        tprocvardef(result).exp_funcretloc:=exp_funcretloc;
{$endif}
      end;


    procedure tprocvardef.ppuwrite(ppufile:tcompilerppufile);
      begin
        inherited ppuwrite(ppufile);

        { Write this entry }
        ppufile.writeentry(ibprocvardef);

        { Save the para symtable, this is taken from the interface }
        tparasymtable(parast).ppuwrite(ppufile);
      end;


    function tprocvardef.GetSymtable(t:tGetSymtable):TSymtable;
      begin
        case t of
          gs_para :
            GetSymtable:=parast;
          else
            GetSymtable:=nil;
        end;
      end;


    function tprocvardef.size : aint;
      begin
         if (po_methodpointer in procoptions) and
            not(po_addressonly in procoptions) then
           size:=2*sizeof(pint)
         else
           size:=sizeof(pint);
      end;


    function tprocvardef.is_methodpointer:boolean;
      begin
        result:=(po_methodpointer in procoptions);
      end;


    function tprocvardef.is_addressonly:boolean;
      begin
        result:=not(po_methodpointer in procoptions) or
                (po_addressonly in procoptions);
      end;


    function tprocvardef.getmangledparaname:string;
      begin
        result:='procvar';
      end;


    function tprocvardef.is_publishable : boolean;
      begin
         is_publishable:=(po_methodpointer in procoptions);
      end;


    function tprocvardef.GetTypeName : string;
      var
        s: string;
        showhidden : boolean;
      begin
{$ifdef EXTDEBUG}
         showhidden:=true;
{$else EXTDEBUG}
         showhidden:=false;
{$endif EXTDEBUG}
         s:='<';
         if po_classmethod in procoptions then
           s := s+'class method type of'
         else
           if po_addressonly in procoptions then
             s := s+'address of'
           else
             s := s+'procedure variable type of';
         if po_local in procoptions then
           s := s+' local';
         if assigned(returndef) and
            (returndef<>voidtype) then
           s:=s+' function'+typename_paras(showhidden)+':'+returndef.GetTypeName
         else
           s:=s+' procedure'+typename_paras(showhidden);
         if po_methodpointer in procoptions then
           s := s+' of object';
         GetTypeName := s+';'+ProcCallOptionStr[proccalloption]+'>';
      end;


{***************************************************************************
                              TOBJECTDEF
***************************************************************************}

   constructor tobjectdef.create(ot : tobjecttyp;const n : string;c : tobjectdef);
     begin
        inherited create(objectdef);
        objecttype:=ot;
        objectoptions:=[];
        childof:=nil;
        symtable:=tObjectSymtable.create(self,n,current_settings.packrecords);
        { create space for vmt !! }
        vmtentries:=TFPList.Create;
        vmt_offset:=0;
        set_parent(c);
        objname:=stringdup(upper(n));
        objrealname:=stringdup(n);
        if objecttype in [odt_interfacecorba,odt_interfacecom,odt_dispinterface] then
          prepareguid;
        { setup implemented interfaces }
        if objecttype in [odt_class,odt_interfacecorba] then
          ImplementedInterfaces:=TFPObjectList.Create(true)
        else
          ImplementedInterfaces:=nil;
        writing_class_record_dbginfo:=false;
     end;


    constructor tobjectdef.ppuload(ppufile:tcompilerppufile);
      var
         i,
         implintfcount : longint;
         d : tderef;
         ImplIntf : TImplementedInterface;
         vmtentry : pvmtentry;
      begin
         inherited ppuload(objectdef,ppufile);
         objecttype:=tobjecttyp(ppufile.getbyte);
         objrealname:=stringdup(ppufile.getstring);
         objname:=stringdup(upper(objrealname^));
         symtable:=tObjectSymtable.create(self,objrealname^,0);
         tObjectSymtable(symtable).datasize:=ppufile.getaint;
         tObjectSymtable(symtable).fieldalignment:=ppufile.getbyte;
         tObjectSymtable(symtable).recordalignment:=ppufile.getbyte;
         vmt_offset:=ppufile.getlongint;
         ppufile.getderef(childofderef);
         ppufile.getsmallset(objectoptions);

         { load guid }
         iidstr:=nil;
         if objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
           begin
              new(iidguid);
              ppufile.getguid(iidguid^);
              iidstr:=stringdup(ppufile.getstring);
           end;

         vmtentries:=TFPList.Create;
         vmtentries.count:=ppufile.getlongint;
         for i:=0 to vmtentries.count-1 do
           begin
             ppufile.getderef(d);
             new(vmtentry);
             vmtentry^.procdef:=nil;
             vmtentry^.procdefderef:=d;
             vmtentry^.visibility:=tvisibility(ppufile.getbyte);
             vmtentries[i]:=vmtentry;
           end;

         { load implemented interfaces }
         if objecttype in [odt_class,odt_interfacecorba] then
           begin
             ImplementedInterfaces:=TFPObjectList.Create(true);
             implintfcount:=ppufile.getlongint;
             for i:=0 to implintfcount-1 do
               begin
                 ppufile.getderef(d);
                 ImplIntf:=TImplementedInterface.Create_deref(d);
                 ImplIntf.IOffset:=ppufile.getlongint;
                 ImplementedInterfaces.Add(ImplIntf);
               end;
           end
         else
           ImplementedInterfaces:=nil;

         if df_copied_def in defoptions then
           ppufile.getderef(cloneddefderef)
         else
           tObjectSymtable(symtable).ppuload(ppufile);

         { handles the predefined class tobject  }
         { the last TOBJECT which is loaded gets }
         { it !                                  }
         if (childof=nil) and
            (objecttype=odt_class) and
            (objname^='TOBJECT') then
           class_tobject:=self;
         if (childof=nil) and
            (objecttype=odt_interfacecom) and
            (objname^='IUNKNOWN') then
           interface_iunknown:=self;
         writing_class_record_dbginfo:=false;
       end;


    destructor tobjectdef.destroy;
      begin
         if assigned(symtable) then
           begin
             symtable.free;
             symtable:=nil;
           end;
         stringdispose(objname);
         stringdispose(objrealname);
         stringdispose(iidstr);
         if assigned(ImplementedInterfaces) then
           begin
             ImplementedInterfaces.free;
             ImplementedInterfaces:=nil;
           end;
         if assigned(iidguid) then
           begin
             dispose(iidguid);
             iidguid:=nil;
           end;
         if assigned(vmtentries) then
           begin
             resetvmtentries;
             vmtentries.free;
             vmtentries:=nil;
           end;
         inherited destroy;
      end;


    function tobjectdef.getcopy : tstoreddef;
      var
        i : longint;
      begin
        result:=tobjectdef.create(objecttype,objname^,childof);
        { the constructor allocates a symtable which we release to avoid memory leaks }
        tobjectdef(result).symtable.free;
        tobjectdef(result).symtable:=symtable.getcopy;
        if assigned(objname) then
          tobjectdef(result).objname:=stringdup(objname^);
        if assigned(objrealname) then
          tobjectdef(result).objrealname:=stringdup(objrealname^);
        tobjectdef(result).objectoptions:=objectoptions;
        include(tobjectdef(result).defoptions,df_copied_def);
        tobjectdef(result).vmt_offset:=vmt_offset;
        if assigned(iidguid) then
          begin
            new(tobjectdef(result).iidguid);
            move(iidguid^,tobjectdef(result).iidguid^,sizeof(iidguid^));
          end;
        if assigned(iidstr) then
          tobjectdef(result).iidstr:=stringdup(iidstr^);
        if assigned(ImplementedInterfaces) then
          begin
            for i:=0 to ImplementedInterfaces.count-1 do
              tobjectdef(result).ImplementedInterfaces.Add(TImplementedInterface(ImplementedInterfaces[i]).Getcopy);
          end;
        if assigned(vmtentries) then
          begin
            tobjectdef(result).vmtentries:=TFPList.Create;
            tobjectdef(result).copyvmtentries(self);
          end;
      end;


    procedure tobjectdef.ppuwrite(ppufile:tcompilerppufile);
      var
         i : longint;
         vmtentry : pvmtentry;
         ImplIntf : TImplementedInterface;
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(objecttype));
         ppufile.putstring(objrealname^);
         ppufile.putaint(tObjectSymtable(symtable).datasize);
         ppufile.putbyte(tObjectSymtable(symtable).fieldalignment);
         ppufile.putbyte(tObjectSymtable(symtable).recordalignment);
         ppufile.putlongint(vmt_offset);
         ppufile.putderef(childofderef);
         ppufile.putsmallset(objectoptions);
         if objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
           begin
              ppufile.putguid(iidguid^);
              ppufile.putstring(iidstr^);
           end;

         ppufile.putlongint(vmtentries.count);
         for i:=0 to vmtentries.count-1 do
           begin
             vmtentry:=pvmtentry(vmtentries[i]);
             ppufile.putderef(vmtentry^.procdefderef);
             ppufile.putbyte(byte(vmtentry^.visibility));
           end;


         if assigned(ImplementedInterfaces) then
           begin
             ppufile.putlongint(ImplementedInterfaces.Count);
             for i:=0 to ImplementedInterfaces.Count-1 do
               begin
                 ImplIntf:=TImplementedInterface(ImplementedInterfaces[i]);
                 ppufile.putderef(ImplIntf.intfdefderef);
                 ppufile.putlongint(ImplIntf.Ioffset);
               end;
           end;

         if df_copied_def in defoptions then
           ppufile.putderef(cloneddefderef);

         ppufile.writeentry(ibobjectdef);

         if not(df_copied_def in defoptions) then
           tObjectSymtable(symtable).ppuwrite(ppufile);
      end;


    function tobjectdef.GetTypeName:string;
      begin
        { in this case we will go in endless recursion, because then  }
        { there is no tsym associated yet with the def. It can occur  }
        { (tests/webtbf/tw4757.pp), so for now give a generic name    }
        { instead of the actual type name                             }
        if not assigned(typesym) then
          result:='<Currently Parsed Class>'
        else
          result:=typename;
      end;


    procedure tobjectdef.buildderef;
      var
         i : longint;
         vmtentry : pvmtentry;
      begin
         inherited buildderef;
         childofderef.build(childof);
         if df_copied_def in defoptions then
           cloneddefderef.build(symtable.defowner)
         else
           tstoredsymtable(symtable).buildderef;

         for i:=0 to vmtentries.count-1 do
           begin
             vmtentry:=pvmtentry(vmtentries[i]);
             vmtentry^.procdefderef.build(vmtentry^.procdef);
           end;

         if assigned(ImplementedInterfaces) then
           begin
             for i:=0 to ImplementedInterfaces.count-1 do
               TImplementedInterface(ImplementedInterfaces[i]).buildderef;
           end;
      end;


    procedure tobjectdef.deref;
      var
         i : longint;
         vmtentry : pvmtentry;
      begin
         inherited deref;
         childof:=tobjectdef(childofderef.resolve);
         if df_copied_def in defoptions then
           begin
             cloneddef:=tobjectdef(cloneddefderef.resolve);
             symtable:=cloneddef.symtable.getcopy;
           end
         else
           tstoredsymtable(symtable).deref;
         for i:=0 to vmtentries.count-1 do
           begin
             vmtentry:=pvmtentry(vmtentries[i]);
             vmtentry^.procdef:=tprocdef(vmtentry^.procdefderef.resolve);
           end;
         if assigned(ImplementedInterfaces) then
           begin
             for i:=0 to ImplementedInterfaces.count-1 do
               TImplementedInterface(ImplementedInterfaces[i]).deref;
           end;
      end;


    procedure tobjectdef.buildderefimpl;
      begin
         inherited buildderefimpl;
         if not (df_copied_def in defoptions) then
           tstoredsymtable(symtable).buildderefimpl;
      end;


    procedure tobjectdef.derefimpl;
      begin
         inherited derefimpl;
         if not (df_copied_def in defoptions) then
           tstoredsymtable(symtable).derefimpl;
      end;


    procedure tobjectdef.resetvmtentries;
      var
        i : longint;
      begin
        for i:=0 to vmtentries.Count-1 do
          Dispose(pvmtentry(vmtentries[i]));
        vmtentries.clear;
      end;


    procedure tobjectdef.copyvmtentries(objdef:tobjectdef);
      var
        i : longint;
        vmtentry : pvmtentry;
      begin
        resetvmtentries;
        vmtentries.count:=objdef.vmtentries.count;
        for i:=0 to objdef.vmtentries.count-1 do
          begin
            new(vmtentry);
            vmtentry^:=pvmtentry(objdef.vmtentries[i])^;
            vmtentries[i]:=vmtentry;
          end;
       end;


    function tobjectdef.getparentdef:tdef;
      begin
{ TODO: Remove getparentdef hack}
        { With 2 forward declared classes with the child class before the
          parent class the child class is written earlier to the ppu. Leaving it
          possible to have a reference to the parent class for property overriding,
          but the parent class still has the childof not resolved yet (PFV) }
        if childof=nil then
          childof:=tobjectdef(childofderef.resolve);
        result:=childof;
      end;


    procedure tobjectdef.prepareguid;
      begin
        { set up guid }
        if not assigned(iidguid) then
         begin
            new(iidguid);
            fillchar(iidguid^,sizeof(iidguid^),0); { default null guid }
         end;
        { setup iidstring }
        if not assigned(iidstr) then
          iidstr:=stringdup(''); { default is empty string }
      end;


    procedure tobjectdef.set_parent( c : tobjectdef);
      begin
        if assigned(childof) then
          exit;
        childof:=c;
        if not assigned(c) then
          exit;
        { inherit options and status }
        objectoptions:=objectoptions+(c.objectoptions*inherited_objectoptions);
        { add the data of the anchestor class/object }
        if (objecttype in [odt_class,odt_object]) then
          begin
            tObjectSymtable(symtable).datasize:=tObjectSymtable(symtable).datasize+tObjectSymtable(c.symtable).datasize;
            { inherit recordalignment }
            tObjectSymtable(symtable).recordalignment:=tObjectSymtable(c.symtable).recordalignment;
            if (oo_has_vmt in objectoptions) and
               (oo_has_vmt in c.objectoptions) then
              tObjectSymtable(symtable).datasize:=tObjectSymtable(symtable).datasize-sizeof(pint);
            { if parent has a vmt field then the offset is the same for the child PM }
            if (oo_has_vmt in c.objectoptions) or is_class(self) then
              begin
                vmt_offset:=c.vmt_offset;
                include(objectoptions,oo_has_vmt);
              end;
          end;
      end;


   procedure tobjectdef.insertvmt;
     var
       vs: tfieldvarsym;
     begin
        if objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
          exit;
        if (oo_has_vmt in objectoptions) then
          internalerror(12345)
        else
          begin
             tObjectSymtable(symtable).datasize:=align(tObjectSymtable(symtable).datasize,
                 tObjectSymtable(symtable).fieldalignment);

             if (tf_requires_proper_alignment in target_info.flags) then
               begin
                 { Align VMT pointer and whole object instance if target CPU requires alignment. }
                 tObjectSymtable(symtable).datasize:=align(tObjectSymtable(symtable).datasize,sizeof(pint));
                 tObjectSymtable(symtable).alignrecord(tObjectSymtable(symtable).datasize,sizeof(pint));
               end;

             vmt_offset:=tObjectSymtable(symtable).datasize;
             vs:=tfieldvarsym.create('_vptr$'+objname^,vs_value,voidpointertype,[]);
             hidesym(vs);
             tObjectSymtable(symtable).insert(vs);
             tObjectSymtable(symtable).addfield(vs,vis_hidden);
             include(objectoptions,oo_has_vmt);
          end;
     end;



   procedure tobjectdef.check_forwards;
     begin
        if not(objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface]) then
          tstoredsymtable(symtable).check_forwards;
        if (oo_is_forward in objectoptions) then
          begin
             { ok, in future, the forward can be resolved }
             Message1(sym_e_class_forward_not_resolved,objrealname^);
             exclude(objectoptions,oo_is_forward);
          end;
     end;


   { true, if self inherits from d (or if they are equal) }
   function tobjectdef.is_related(d : tdef) : boolean;
     var
        hp : tobjectdef;
     begin
        hp:=self;
        while assigned(hp) do
          begin
             if hp=d then
               begin
                  is_related:=true;
                  exit;
               end;
             hp:=hp.childof;
          end;
        is_related:=false;
     end;


   function tobjectdef.FindDestructor : tprocdef;
     var
        objdef : tobjectdef;
        i   : longint;
        sym : tsym;
        pd  : tprocdef;
     begin
        result:=nil;
        objdef:=self;
        while assigned(objdef) do
          begin
            for i:=0 to objdef.symtable.SymList.Count-1 do
              begin
                sym:=TSym(objdef.symtable.SymList[i]);
                if sym.typ=procsym then
                  begin
                    pd:=Tprocsym(sym).Find_procdef_bytype(potype_destructor);
                    if assigned(pd) then
                      begin
                        result:=pd;
                        exit;
                      end;
                  end;
               end;
             objdef:=objdef.childof;
          end;
     end;

    function tobjectdef.implements_any_interfaces: boolean;
      begin
        result := (ImplementedInterfaces.Count > 0) or
          (assigned(childof) and childof.implements_any_interfaces);
      end;


{$ifdef support_llvm}
    procedure tobjectdef.reset;
      begin
        fllvm_class_struct_name_sym:=nil;
        fllvm_vmt_name_sym:=nil;
        inherited reset;
      end;
{$endif support_llvm}


    function tobjectdef.size : aint;
      begin
        if objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
          result:=sizeof(pint)
        else
          result:=tObjectSymtable(symtable).datasize;
      end;


    function tobjectdef.alignment:shortint;
      begin
        if objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
          alignment:=sizeof(pint)
        else
          alignment:=tObjectSymtable(symtable).recordalignment;
      end;


    function tobjectdef.vmtmethodoffset(index:longint):longint;
      begin
        { for offset of methods for classes, see rtl/inc/objpash.inc }
        case objecttype of
        odt_class:
          { the +2*sizeof(pint) is size and -size }
          vmtmethodoffset:=(index+10)*sizeof(pint)+2*sizeof(pint);
        odt_interfacecom,odt_interfacecorba:
          vmtmethodoffset:=index*sizeof(pint);
        else
{$ifdef WITHDMT}
          vmtmethodoffset:=(index+4)*sizeof(pint);
{$else WITHDMT}
          vmtmethodoffset:=(index+3)*sizeof(pint);
{$endif WITHDMT}
        end;
      end;


    function tobjectdef.vmt_mangledname : string;
      begin
        if not(oo_has_vmt in objectoptions) then
          Message1(parser_n_object_has_no_vmt,objrealname^);
        vmt_mangledname:=make_mangledname('VMT',owner,objname^);
      end;


    function tobjectdef.needs_inittable : boolean;
      begin
         case objecttype of
            odt_dispinterface,
            odt_class :
              needs_inittable:=false;
            odt_interfacecom:
              needs_inittable:=true;
            odt_interfacecorba:
              needs_inittable:=is_related(interface_iunknown);
            odt_object:
              needs_inittable:=tObjectSymtable(symtable).needs_init_final;
            odt_cppclass:
              needs_inittable:=false;
            else
              internalerror(200108267);
         end;
      end;


    function tobjectdef.members_need_inittable : boolean;
      begin
        members_need_inittable:=tObjectSymtable(symtable).needs_init_final;
      end;


    function tobjectdef.find_implemented_interface(aintfdef:tobjectdef):TImplementedInterface;
      var
        ImplIntf : TImplementedInterface;
        i : longint;
      begin
        result:=nil;
        if not assigned(ImplementedInterfaces) then
          exit;
        for i:=0 to ImplementedInterfaces.Count-1 do
          begin
            ImplIntf:=TImplementedInterface(ImplementedInterfaces[i]);
            if ImplIntf.intfdef=aintfdef then
              begin
                result:=ImplIntf;
                exit;
              end;
          end;
      end;


    function tobjectdef.is_publishable : boolean;
      begin
         is_publishable:=objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_dispinterface];
      end;


{$ifdef support_llvm}
    procedure tobjectdef.set_llvm_name_syms;
      begin
        inherited set_llvm_name_syms;
        if not assigned(fllvm_class_struct_name_sym) and
           is_class_or_interface_or_dispinterface(self) then
          begin
            fllvm_class_struct_name_sym:=current_asmdata.DefineAsmSymbol(llvm_mangledname+'$$$struct',AB_LOCAL,AT_DATA);
            fllvm_vmt_name_sym:=current_asmdata.DefineAsmSymbol(llvm_mangledname+'$$$vmt',AB_LOCAL,AT_DATA);
          end;
      end;


    function tobjectdef.get_llvm_class_struct_name_sym: tasmsymbol;
      begin
        set_llvm_name_syms;
        result:=fllvm_class_struct_name_sym;
      end;


    function tobjectdef.get_llvm_vmt_name_sym: tasmsymbol;
      begin
        set_llvm_name_syms;
        result:=fllvm_vmt_name_sym;
      end;
{$endif support_llvm}

{****************************************************************************
                             TImplementedInterface
****************************************************************************}

    constructor TImplementedInterface.create(aintf: tobjectdef);
      begin
        inherited create;
        intfdef:=aintf;
        IOffset:=-1;
        IType:=etStandard;
        NameMappings:=nil;
        procdefs:=nil;
      end;


    constructor TImplementedInterface.create_deref(d:tderef);
      begin
        inherited create;
        intfdef:=nil;
        intfdefderef:=d;
        IOffset:=-1;
        IType:=etStandard;
        NameMappings:=nil;
        procdefs:=nil;
      end;


    destructor  TImplementedInterface.destroy;
      var
        i : longint;
        mappedname : pshortstring;
      begin
        if assigned(NameMappings) then
          begin
            for i:=0 to NameMappings.Count-1 do
              begin
                mappedname:=pshortstring(NameMappings[i]);
                stringdispose(mappedname);
              end;
            NameMappings.free;
            NameMappings:=nil;
          end;
        if assigned(procdefs) then
          begin
            procdefs.free;
            procdefs:=nil;
          end;
        inherited destroy;
      end;


    procedure TImplementedInterface.buildderef;
      begin
        intfdefderef.build(intfdef);
      end;


    procedure TImplementedInterface.deref;
      begin
        intfdef:=tobjectdef(intfdefderef.resolve);
      end;


    procedure TImplementedInterface.AddMapping(const origname,newname: string);
      begin
        if not assigned(NameMappings) then
          NameMappings:=TFPHashList.Create;
        NameMappings.Add(origname,stringdup(newname));
      end;


    function TImplementedInterface.GetMapping(const origname: string):string;
      var
        mappedname : pshortstring;
      begin
        result:='';
        if not assigned(NameMappings) then
          exit;
        mappedname:=PShortstring(NameMappings.Find(origname));
        if assigned(mappedname) then
          result:=mappedname^;
      end;


    procedure TImplementedInterface.AddImplProc(pd:tprocdef);
      begin
        if not assigned(procdefs) then
          procdefs:=TFPObjectList.Create(false);
        { duplicate entries must be stored, because multiple }
        { interfaces can declare methods with the same name  }
        { and all of these get their own VMT entry           }
        procdefs.Add(pd);
      end;


    function TImplementedInterface.IsImplMergePossible(MergingIntf:TImplementedInterface;out weight: longint): boolean;
      var
        i : longint;
      begin
        result:=false;
        { interfaces being implemented through delegation are not mergable (FK) }
        if (MergingIntf.IType<>etStandard) or not(assigned(ProcDefs)) then
          exit;
        weight:=0;
        { empty interface is mergeable }
        if ProcDefs.Count=0 then
          begin
            result:=true;
            exit;
          end;
        { The interface to merge must at least the number of
          procedures of this interface }
        if MergingIntf.ProcDefs.Count<ProcDefs.Count then
          exit;
        for i:=0 to ProcDefs.Count-1 do
          begin
            if MergingIntf.ProcDefs[i]<>ProcDefs[i] then
              exit;
          end;
        weight:=ProcDefs.Count;
        result:=true;
      end;


    function TImplementedInterface.getcopy:TImplementedInterface;
      begin
        Result:=TImplementedInterface.Create(nil);
        Move(pointer(self)^,pointer(result)^,InstanceSize);
      end;


{****************************************************************************
                                TFORWARDDEF
****************************************************************************}

   constructor tforwarddef.create(const s:string;const pos : tfileposinfo);
     begin
        inherited create(forwarddef);
        tosymname:=stringdup(s);
        forwardpos:=pos;
     end;


    function tforwarddef.GetTypeName:string;
      begin
        GetTypeName:='unresolved forward to '+tosymname^;
      end;


    destructor tforwarddef.destroy;
      begin
        stringdispose(tosymname);
        inherited destroy;
      end;


{****************************************************************************
                               TUNDEFINEDDEF
****************************************************************************}

   constructor tundefineddef.create;
     begin
        inherited create(undefineddef);
     end;


    constructor tundefineddef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(undefineddef,ppufile);
      end;

    function tundefineddef.GetTypeName:string;
      begin
        GetTypeName:='<undefined type>';
      end;


    procedure tundefineddef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.writeentry(ibundefineddef);
      end;


{****************************************************************************
                                  TERRORDEF
****************************************************************************}

    constructor terrordef.create;
      begin
        inherited create(errordef);
        { prevent consecutive faults }
        savesize:=1;
      end;


    procedure terrordef.ppuwrite(ppufile:tcompilerppufile);
      begin
        { Can't write errordefs to ppu }
        internalerror(200411063);
      end;


    function terrordef.GetTypeName:string;
      begin
        GetTypeName:='<erroneous type>';
      end;


    function terrordef.getmangledparaname:string;
      begin
        getmangledparaname:='error';
      end;


{****************************************************************************
                           Definition Helpers
****************************************************************************}

    function is_interfacecom(def: tdef): boolean;
      begin
        is_interfacecom:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype=odt_interfacecom);
      end;

    function is_interfacecorba(def: tdef): boolean;
      begin
        is_interfacecorba:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype=odt_interfacecorba);
      end;

    function is_interface(def: tdef): boolean;
      begin
        is_interface:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype in [odt_interfacecom,odt_interfacecorba]);
      end;


    function is_dispinterface(def: tdef): boolean;
      begin
        result:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype=odt_dispinterface);
      end;


    function is_class(def: tdef): boolean;
      begin
        is_class:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype=odt_class);
      end;


    function is_object(def: tdef): boolean;
      begin
        is_object:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype=odt_object);
      end;


    function is_cppclass(def: tdef): boolean;
      begin
        is_cppclass:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype=odt_cppclass);
      end;


    function is_class_or_interface(def: tdef): boolean;
      begin
        result:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype in [odt_class,odt_interfacecom,odt_interfacecorba]);
      end;


    function is_class_or_interface_or_object(def: tdef): boolean;
      begin
        result:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_object]);
      end;


    function is_class_or_interface_or_dispinterface(def: tdef): boolean;
      begin
        result:=
          assigned(def) and
          (def.typ=objectdef) and
          (tobjectdef(def).objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_dispinterface]);
      end;


{$ifdef x86}
    function use_sse(def : tdef) : boolean;
      begin
        use_sse:=(is_single(def) and (current_settings.fputype in sse_singlescalar)) or
          (is_double(def) and (current_settings.fputype in sse_doublescalar));
      end;
{$endif x86}

end.