freepascal.compiler/compiler/ncgcal.pas

{
    Id: ncgcal.pas,v 1.10 2002/08/17 09:23:35 florian Exp $
    Copyright (c) 1998-2002 by Florian Klaempfl

    Generate i386 assembler for in call nodes

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published bymethodpointer
    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 ncgcal;

{$i fpcdefs.inc}

interface

{ $define AnsiStrRef}

    uses
      cpubase,
      globtype,
      symdef,node,ncal;

    type
       tcgcallparanode = class(tcallparanode)
          procedure secondcallparan(push_from_left_to_right:boolean;calloption:tproccalloption;
                para_alignment,para_offset : longint);override;
       end;

       tcgcallnode = class(tcallnode)
       protected
          funcretref : treference;
          refcountedtemp : treference;
          procedure handle_return_value(inlined,extended_new:boolean);
          {# This routine is used to push the current frame pointer 
             on the stack. This is used in nested routines where the
             value of the frame pointer is always pushed as an extra
             parameter.
             
             The default handling is the standard handling used on
             most stack based machines, where the frame pointer is
             the first invisible parameter.
          }
          procedure load_framepointer;virtual;
          procedure extra_interrupt_code;virtual;
       public
          procedure pass_2;override;
       end;

       tcgprocinlinenode = class(tprocinlinenode)
          procedure pass_2;override;
       end;


implementation

    uses
      systems,
      cutils,verbose,globals,
      symconst,symbase,symsym,symtable,defutil,paramgr,
{$ifdef GDB}
  {$ifdef delphi}
      sysutils,
  {$else}
      strings,
  {$endif}
      gdb,
{$endif GDB}
      cginfo,cgbase,pass_2,
      cpuinfo,cpupi,aasmbase,aasmtai,aasmcpu,
      nmem,nld,ncnv,
{$ifdef i386}
      cga,
{$endif i386}
      cg64f32,ncgutil,cgobj,tgobj,regvars,rgobj,rgcpu,cgcpu;

{*****************************************************************************
                             TCGCALLPARANODE
*****************************************************************************}

    procedure tcgcallparanode.secondcallparan(push_from_left_to_right:boolean;calloption:tproccalloption;para_alignment,para_offset : longint);


{$ifndef VS_HIDDEN}
      { goes to pass 1 }
      procedure maybe_push_high;
        begin
           { open array ? }
           { defcoll.data can be nil for read/write }
           if assigned(paraitem.paratype.def) and
              assigned(hightree) then
            begin
              secondpass(hightree);
              { this is a longint anyway ! }
              push_value_para(hightree,calloption,para_offset,4,paraitem.paraloc);
            end;
        end;
{$endif VS_HIDDEN}

      var
         otlabel,oflabel : tasmlabel;
         { temporary variables: }
         tempdeftype : tdeftype;
         tmpreg : tregister;
         href   : treference;

      begin
         { push from left to right if specified }
         if push_from_left_to_right and assigned(right) then
          begin
            if (nf_varargs_para in flags) then
              tcallparanode(right).secondcallparan(push_from_left_to_right,
                                                   calloption,para_alignment,para_offset)
            else
              tcallparanode(right).secondcallparan(push_from_left_to_right,
                                                   calloption,para_alignment,para_offset);
          end;

         otlabel:=truelabel;
         oflabel:=falselabel;
         objectlibrary.getlabel(truelabel);
         objectlibrary.getlabel(falselabel);
         secondpass(left);
         { handle varargs first, because defcoll is not valid }
         if (nf_varargs_para in flags) then
           begin
             if paramanager.push_addr_param(left.resulttype.def,calloption) then
               begin
                 inc(pushedparasize,4);
                 cg.a_paramaddr_ref(exprasmlist,left.location.reference,paraitem.paraloc);
                 location_release(exprasmlist,left.location);
               end
             else
               push_value_para(left,calloption,para_offset,para_alignment,paraitem.paraloc);
           end
         { filter array constructor with c styled args }
         else if is_array_constructor(left.resulttype.def) and (nf_cargs in left.flags) then
           begin
             { nothing, everything is already pushed }
           end
         { in codegen.handleread.. paraitem.data is set to nil }
         else if assigned(paraitem.paratype.def) and
                 (paraitem.paratype.def.deftype=formaldef) then
           begin
              { allow passing of a constant to a const formaldef }
              if (paraitem.paratyp=vs_const) and
                 (left.location.loc=LOC_CONSTANT) then
                location_force_mem(exprasmlist,left.location);

              { allow @var }
              inc(pushedparasize,4);
              if (left.nodetype=addrn) and
                 (not(nf_procvarload in left.flags)) then
                begin
                  if calloption=pocall_inline then
                    begin
                       reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
                       cg.a_load_loc_ref(exprasmlist,left.location,href);
                    end
                  else
                    cg.a_param_loc(exprasmlist,left.location,paraitem.paraloc);
                  location_release(exprasmlist,left.location);
                end
              else
                begin
                   if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
                     begin
                        CGMessage(type_e_mismatch)
                     end
                   else
                     begin
                       if calloption=pocall_inline then
                         begin
                           tmpreg:=cg.get_scratch_reg_address(exprasmlist);
                           cg.a_loadaddr_ref_reg(exprasmlist,left.location.reference,tmpreg);
                           reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
                           cg.a_load_reg_ref(exprasmlist,OS_ADDR,tmpreg,href);
                           cg.free_scratch_reg(exprasmlist,tmpreg);
                         end
                       else
                         cg.a_paramaddr_ref(exprasmlist,left.location.reference,paraitem.paraloc);
                       location_release(exprasmlist,left.location);
                     end;
                end;
           end
         { handle call by reference parameter }
         else if (paraitem.paratyp in [vs_var,vs_out]) then
           begin
              if (left.location.loc<>LOC_REFERENCE) then
               begin
                 { passing self to a var parameter is allowed in
                   TP and delphi }
                 if not((left.location.loc=LOC_CREFERENCE) and
                        (left.nodetype=selfn)) then
                  internalerror(200106041);
               end;
{$ifdef unused}
              if not push_from_left_to_right then
{$endif unused}
{$ifndef VS_HIDDEN}
                maybe_push_high;
{$endif VS_HIDDEN}
              if (paraitem.paratyp=vs_out) and
                 assigned(paraitem.paratype.def) and
                 not is_class(paraitem.paratype.def) and
                 paraitem.paratype.def.needs_inittable then
                cg.g_finalize(exprasmlist,paraitem.paratype.def,left.location.reference,false);
              inc(pushedparasize,4);
              if calloption=pocall_inline then
                begin
                   tmpreg:=cg.get_scratch_reg_address(exprasmlist);
                   cg.a_loadaddr_ref_reg(exprasmlist,left.location.reference,tmpreg);
                   reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
                   cg.a_load_reg_ref(exprasmlist,OS_ADDR,tmpreg,href);
                   cg.free_scratch_reg(exprasmlist,tmpreg);
                end
              else
                cg.a_paramaddr_ref(exprasmlist,left.location.reference,paraitem.paraloc);
              location_release(exprasmlist,left.location);
{$ifdef unused}
              if push_from_left_to_right then
                maybe_push_high;
{$endif unused}
           end
         else
           begin
              tempdeftype:=resulttype.def.deftype;
              if tempdeftype=filedef then
               CGMessage(cg_e_file_must_call_by_reference);
              { open array must always push the address, this is needed to
                also push addr of small open arrays and with cdecl functions (PFV) }
              if (
                  assigned(paraitem.paratype.def) and
                  (is_open_array(paraitem.paratype.def) or
                   is_array_of_const(paraitem.paratype.def))
                 ) or
                 (
                  paramanager.push_addr_param(resulttype.def,calloption)
                 ) then
                begin
                   if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
                    begin
                      { allow passing nil to a procvardef (methodpointer) }
(*                      if (left.nodetype=typeconvn) and
                         (left.resulttype.def.deftype=procvardef) and
                         (ttypeconvnode(left).left.nodetype=niln) then
*)
                      if (left.location.size <> OS_NO) then
                       begin
                         tg.GetTemp(exprasmlist,tcgsize2size[left.location.size],tt_normal,href);
                         if not (left.location.size in [OS_64,OS_S64]) then
                           cg.a_load_loc_ref(exprasmlist,left.location,href)
                         else
                           cg64.a_load64_loc_ref(exprasmlist,left.location,href);
                         location_reset(left.location,LOC_REFERENCE,left.location.size);
                         left.location.reference:=href;
                       end
                      else
                       internalerror(200204011);
                    end;

{$ifdef unused}
                   if not push_from_left_to_right then
{$endif unused}
{$ifndef VS_HIDDEN}
                     maybe_push_high;
{$endif VS_HIDDEN}
                   inc(pushedparasize,4);
                   if calloption=pocall_inline then
                     begin
                        tmpreg:=cg.get_scratch_reg_address(exprasmlist);
                        cg.a_loadaddr_ref_reg(exprasmlist,left.location.reference,tmpreg);
                        reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
                        cg.a_load_reg_ref(exprasmlist,OS_ADDR,tmpreg,href);
                        cg.free_scratch_reg(exprasmlist,tmpreg);
                     end
                   else
                     cg.a_paramaddr_ref(exprasmlist,left.location.reference,paraitem.paraloc);
                   location_release(exprasmlist,left.location);
{$ifdef unused}
                   if push_from_left_to_right then
                     maybe_push_high;
{$endif unused}
                end
              else
                begin
                   push_value_para(left,calloption,
                     para_offset,para_alignment,paraitem.paraloc);
                end;
           end;
         truelabel:=otlabel;
         falselabel:=oflabel;
         { push from right to left }
         if not push_from_left_to_right and assigned(right) then
          begin
            if (nf_varargs_para in flags) then
              tcallparanode(right).secondcallparan(push_from_left_to_right,
                                                   calloption,para_alignment,para_offset)
            else
              tcallparanode(right).secondcallparan(push_from_left_to_right,
                                                   calloption,para_alignment,para_offset);
          end;
      end;


{*****************************************************************************
                             TCGCALLNODE
*****************************************************************************}

    procedure tcgcallnode.extra_interrupt_code;

    var r:Tregister;

      begin
{$ifdef i386}
         { if the i386 ever uses tcgcal, we've to move this into an overriden method }
         emit_none(A_PUSHF,S_L);
         r.enum:=R_CS;
         emit_reg(A_PUSH,S_L,r);
{$endif i386}
      end;
      
      
      procedure tcgcallnode.load_framepointer;
        var href : treference;
            hregister : tregister;
            i: integer; 
        begin
          { this routine is itself not nested }
          if lexlevel=(tprocdef(procdefinition).parast.symtablelevel) then
            begin
              reference_reset_base(href,procinfo.framepointer,procinfo.framepointer_offset);
              cg.a_param_ref(exprasmlist,OS_ADDR,href,paramanager.getintparaloc(1));
            end
          { one nesting level }
          else if (lexlevel=(tprocdef(procdefinition).parast.symtablelevel)-1) then
            begin
              cg.a_param_reg(exprasmlist,OS_ADDR,procinfo.framepointer,paramanager.getintparaloc(1));
            end
          { very complex nesting level ... }  
          else if (lexlevel>(tprocdef(procdefinition).parast.symtablelevel)) then
            begin
              hregister:=rg.getaddressregister(exprasmlist);
              reference_reset_base(href,procinfo.framepointer,procinfo.framepointer_offset);
              cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,hregister);
              for i:=(tprocdef(procdefinition).parast.symtablelevel) to lexlevel-1 do
                begin
                  reference_reset_base(href,hregister,procinfo.framepointer_offset);
                  cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,hregister);
                end;
              cg.a_param_reg(exprasmlist,OS_ADDR,hregister,paramanager.getintparaloc(1));
              rg.ungetaddressregister(exprasmlist,hregister);
            end;
        end;
      



    procedure tcgcallnode.handle_return_value(inlined,extended_new:boolean);
      var
        cgsize : tcgsize;
        r,hregister : tregister;
        nr:Tnewregister;
      begin
        { structured results are easy to handle.... }
        { needed also when result_no_used !! }
        if paramanager.ret_in_param(resulttype.def,procdefinition.proccalloption) then
         begin
           location_reset(location,LOC_CREFERENCE,def_cgsize(resulttype.def));
           location.reference.symbol:=nil;
           location.reference:=funcretref;
         end
        else
        { ansi/widestrings must be registered, so we can dispose them }
         if is_ansistring(resulttype.def) or
            is_widestring(resulttype.def) then
          begin
            location_reset(location,LOC_CREFERENCE,OS_ADDR);
            location.reference:=refcountedtemp;
            r.enum:=accumulator;
            cg.a_reg_alloc(exprasmlist,r);
            cg.a_load_reg_ref(exprasmlist,OS_ADDR,r,location.reference);
            cg.a_reg_dealloc(exprasmlist,r);
          end
        else
        { we have only to handle the result if it is used }
         if (nf_return_value_used in flags) then
          begin
            case resulttype.def.deftype of
              enumdef,
              orddef :
                begin
                  cgsize:=def_cgsize(resulttype.def);
                  { an object constructor is a function with boolean result }
                  if (inlined or (right=nil)) and
                     (procdefinition.proctypeoption=potype_constructor) then
                   begin
{$ifdef x86}
                     if extended_new then
                      cgsize:=OS_INT
                     else
                      begin
                        cgsize:=OS_NO;
                        { this fails if popsize > 0 PM }
                        location_reset(location,LOC_FLAGS,OS_NO);
                        location.resflags:=F_NE;
                      end;
{$else x86}
                     cgsize:=OS_INT
{$endif x86}
                   end;

                  if cgsize<>OS_NO then
                   begin
                     location_reset(location,LOC_REGISTER,cgsize);
{$ifndef cpu64bit}
                     if cgsize in [OS_64,OS_S64] then
                      begin
                        {Move the function result to free registers, preferably the
                         accumulator/accumulatorhigh, so no move is necessary.}
                        r.enum:=R_INTREGISTER;
                        r.number:=NR_ACCUMULATOR;
                        hregister.enum:=R_INTREGISTER;
                        hregister.number:=NR_ACCUMULATORHIGH;
                        cg.a_reg_alloc(exprasmlist,r);
                        cg.a_reg_alloc(exprasmlist,hregister);
                        if RS_ACCUMULATOR in rg.unusedregsint then
                          location.registerlow:=rg.getexplicitregisterint(exprasmlist,NR_ACCUMULATOR)
                        else
                          location.registerlow:=rg.getregisterint(exprasmlist,OS_INT);
                        if RS_ACCUMULATORHIGH in rg.unusedregsint then
                          location.registerhigh:=rg.getexplicitregisterint(exprasmlist,NR_ACCUMULATORHIGH)
                        else
                          location.registerhigh:=rg.getregisterint(exprasmlist,OS_INT);
                        cg64.a_load64_reg_reg(exprasmlist,joinreg64(r,hregister),
                            location.register64);
                      end
                     else
{$endif cpu64bit}
                      begin
                        {Move the function result to a free register, preferably the
                         accumulator, so no move is necessary.}
                        nr:=RS_ACCUMULATOR shl 8 or cgsize2subreg(cgsize);
                        r.enum:=R_INTREGISTER;
                        r.number:=nr;
                        cg.a_reg_alloc(exprasmlist,r);
                        if RS_ACCUMULATOR in rg.unusedregsint then
                          location.register:=rg.getexplicitregisterint(exprasmlist,nr)
                        else
                          location.register:=rg.getregisterint(exprasmlist,cgsize);
                        cg.a_load_reg_reg(exprasmlist,cgsize,cgsize,r,location.register);
                      end;
                   end;
                end;
              floatdef :
                begin
                  location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
{$ifdef cpufpemu}
                  if cs_fp_emulation in aktmoduleswitches then
                    location.register.enum := accumulator
                 else
{$endif cpufpemu}
                  location.register.enum:=fpu_result_reg;
{$ifdef x86}
                  inc(trgcpu(rg).fpuvaroffset);
{$endif x86}
                end;
{$ifdef TEST_WIN32_RECORDS}
              recorddef :
                begin
                  if (target_info.system=system_i386_win32) then
                   begin
                     location_reset(location,LOC_REFERENCE,def_cgsize(resulttype.def));
                     tg.GetTemp(exprasmlist,resulttype.size,tt_normal,location);
{$ifndef cpu64bit}
                     if cgsize in [OS_64,OS_S64] then
                       cg64.a_load64_reg_loc(exprasmlist,joinreg64(accumulator,accumulatorhigh),location)
                     else
{$endif cpu64bit}
                       cg.a_load_reg_loc(exprasmlist,accumulator,location);
                   end
                  else
                   internalerror(200211141);
                end;
{$endif TEST_WIN32_RECORDS}
              else
                begin
                  location_reset(location,LOC_REGISTER,OS_INT);
                  if RS_ACCUMULATOR in rg.unusedregsint then
                    location.register:=rg.getexplicitregisterint(exprasmlist,NR_ACCUMULATOR)
                  else
                    location.register:=rg.getregisterint(exprasmlist,OS_INT);
                  r.enum:=R_INTREGISTER;
                  r.number:=NR_ACCUMULATOR;
                  cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,r,location.register);
                end;
            end;
         end;
      end;


    procedure tcgcallnode.pass_2;
      var
         regs_to_push_int : Tsupregset;
         regs_to_push_other : tregisterset;
         unusedstate: pointer;
         pushed : tpushedsaved;
         pushedint : tpushedsavedint;
         tmpreg : tregister;
         hregister : tregister;
         hregister64 : tregister64;
         oldpushedparasize : longint;
         { true if ESI must be loaded again after the subroutine }
         loadesi : boolean;
         { true if a virtual method must be called directly }
         no_virtual_call : boolean;
         { true if we produce a con- or destrutor in a call }
         is_con_or_destructor : boolean;
         { true if a constructor is called again }
         extended_new : boolean;
         { adress returned from an I/O-error }
         iolabel : tasmlabel;
         { lexlevel count }
         i : longint;
         { help reference pointer }
         href : treference;
         hrefvmt : treference;
         hp : tnode;
         pp : tbinarynode;
         params : tnode;
         inlined : boolean;
         inlinecode : tprocinlinenode;
         store_parast_fixup,
         para_alignment,
         para_offset : longint;
         cgsize : tcgsize;
         { instruction for alignement correction }
{        corr : paicpu;}
         { we must pop this size also after !! }
{        must_pop : boolean; }
         pop_size : longint;
{$ifdef OPTALIGN}
         pop_esp : boolean;
         push_size : longint;
{$endif OPTALIGN}
         pop_allowed : boolean;
         release_tmpreg : boolean;
         constructorfailed : tasmlabel;
         resultloc : tparalocation;
         returnref,
         pararef : treference;
         r,r2:Tregister;
      label
         dont_call;

      begin
         extended_new:=false;
         iolabel:=nil;
         inlinecode:=nil;
         inlined:=false;
         loadesi:=true;
         no_virtual_call:=false;
         rg.saveunusedstate(unusedstate);

         { if we allocate the temp. location for ansi- or widestrings }
         { already here, we avoid later a push/pop                    }
         if is_widestring(resulttype.def) then
           begin
             tg.GetTemp(exprasmlist,pointer_size,tt_widestring,refcountedtemp);
             cg.g_decrrefcount(exprasmlist,resulttype.def,refcountedtemp);
           end
         else if is_ansistring(resulttype.def) then
           begin
             tg.GetTemp(exprasmlist,pointer_size,tt_ansistring,refcountedtemp);
             cg.g_decrrefcount(exprasmlist,resulttype.def,refcountedtemp);
           end;

         if (procdefinition.proccalloption in [pocall_cdecl,pocall_cppdecl,pocall_stdcall]) then
          para_alignment:=4
         else
          para_alignment:=aktalignment.paraalign;

         if not assigned(procdefinition) then
          exit;

         { Deciding whether we may still need the parameters happens next (JM) }
         if assigned(left) then
           params:=left.getcopy
         else
           params := nil;

         if (procdefinition.proccalloption=pocall_inline) then
           begin
              inlined:=true;
              inlinecode:=tprocinlinenode(right);
              right:=nil;
              { set it to the same lexical level as the local symtable, becuase
                the para's are stored there }
              tprocdef(procdefinition).parast.symtablelevel:=aktprocdef.localst.symtablelevel;
              if assigned(params) then
               begin
                 inlinecode.para_size:=tprocdef(procdefinition).para_size(para_alignment);
                 tg.GetTemp(exprasmlist,inlinecode.para_size,tt_persistant,pararef);
                 inlinecode.para_offset:=pararef.offset;
               end;
              store_parast_fixup:=tprocdef(procdefinition).parast.address_fixup;
              tprocdef(procdefinition).parast.address_fixup:=inlinecode.para_offset;
{$ifdef extdebug}
             Comment(V_debug,
               'inlined parasymtable is at offset '
               +tostr(tprocdef(procdefinition).parast.address_fixup));
             exprasmList.concat(tai_comment.Create(
               strpnew('inlined parasymtable is at offset '
               +tostr(tprocdef(procdefinition).parast.address_fixup))));
{$endif extdebug}
           end;
         { only if no proc var }
         if inlined or
            not(assigned(right)) then
           is_con_or_destructor:=(procdefinition.proctypeoption in [potype_constructor,potype_destructor]);
         { proc variables destroy all registers }
         if (inlined or
            (right=nil)) and
            { virtual methods too }
            not(po_virtualmethod in procdefinition.procoptions) then
           begin
              if (cs_check_io in aktlocalswitches) and
                 (po_iocheck in procdefinition.procoptions) and
                 not(po_iocheck in aktprocdef.procoptions) then
                begin
                   objectlibrary.getaddrlabel(iolabel);
                   cg.a_label(exprasmlist,iolabel);
                end
              else
                iolabel:=nil;

              { save all used registers and possible registers
                used for the return value }
              regs_to_push_int := tprocdef(procdefinition).usedintregisters;
              regs_to_push_other := tprocdef(procdefinition).usedotherregisters;
              if (not is_void(resulttype.def)) and
                 (not paramanager.ret_in_param(resulttype.def,procdefinition.proccalloption)) then
               begin
                 include(regs_to_push_int,RS_ACCUMULATOR);
{$ifndef cpu64bit}
                 if resulttype.def.size>sizeof(aword) then
                   include(regs_to_push_int,RS_ACCUMULATORHIGH);
{$endif cpu64bit}
               end;
              rg.saveusedintregisters(exprasmlist,pushedint,regs_to_push_int);
              rg.saveusedotherregisters(exprasmlist,pushed,regs_to_push_other);

              { give used registers through }
              rg.usedintinproc:=rg.usedintinproc + tprocdef(procdefinition).usedintregisters;
              rg.usedinproc:=rg.usedinproc + tprocdef(procdefinition).usedotherregisters;
           end
         else
           begin
              regs_to_push_int := all_intregisters;
              regs_to_push_other := all_registers;
              rg.saveusedintregisters(exprasmlist,pushedint,regs_to_push_int);
              rg.saveusedotherregisters(exprasmlist,pushed,regs_to_push_other);
              rg.usedinproc:=all_registers;
              { no IO check for methods and procedure variables }
              iolabel:=nil;
           end;

         { generate the code for the parameter and push them }
         oldpushedparasize:=pushedparasize;
         pushedparasize:=0;
         pop_size:=0;

{$ifdef dummy}
         { no inc esp for inlined procedure
           and for objects constructors PM }
         if inlined or
            ((procdefinition.proctypeoption=potype_constructor) and
            { quick'n'dirty check if it is a class or an object }
             (resulttype.def.deftype=orddef)) then
           pop_allowed:=false
         else
           pop_allowed:=true;
         if pop_allowed then
          begin
          { Old pushedsize aligned on 4 ? }
            i:=oldpushedparasize and 3;
            if i>0 then
             inc(pop_size,4-i);
          { This parasize aligned on 4 ? }
            i:=procdefinition.para_size(para_alignment) and 3;
            if i>0 then
             inc(pop_size,4-i);
          { insert the opcode and update pushedparasize }
          { never push 4 or more !! }
            pop_size:=pop_size mod 4;
            if pop_size>0 then
             begin
               inc(pushedparasize,pop_size);
               cg.a_const_reg(A_SUB,S_L,pop_size,R_ESP);
{$ifdef GDB}
               if (cs_debuginfo in aktmoduleswitches) and
                  (exprasmList.first=exprasmList.last) then
                 exprasmList.concat(Tai_force_line.Create);
{$endif GDB}
             end;
          end;
{$endif dummy}

{$ifdef OPTALIGN}
         if pop_allowed and (cs_align in aktglobalswitches) then
           begin
              pop_esp:=true;
              push_size:=procdefinition.para_size(para_alignment);
              { !!!! here we have to take care of return type, self
                and nested procedures
              }
              inc(push_size,12);
              r.enum:=R_ESP:
              r2.enum:=R_EDI;
              emit_reg_reg(A_MOV,S_L,r,r2);
              if (push_size mod 8)=0 then
                emit_const_reg(A_AND,S_L,$fffffff8,r)
              else
                begin
                   emit_const_reg(A_SUB,S_L,push_size,r);
                   emit_const_reg(A_AND,S_L,$fffffff8,r);
                   emit_const_reg(A_SUB,S_L,push_size,r);
                end;
              emit_reg(A_PUSH,S_L,r2);
           end
         else
           pop_esp:=false;
{$endif OPTALIGN}

         { Push parameters }
         if assigned(params) then
           begin
              { be found elsewhere }
              if inlined then
                para_offset:=tprocdef(procdefinition).parast.address_fixup+
                  tprocdef(procdefinition).parast.datasize
              else
                para_offset:=0;
              if not(inlined) and
                 assigned(right) then
                tcallparanode(params).secondcallparan(
                 { TParaItem(tabstractprocdef(right.resulttype.def).Para.first), }
                  (po_leftright in procdefinition.procoptions),procdefinition.proccalloption,
                  para_alignment,para_offset)
              else
                tcallparanode(params).secondcallparan(
                  { TParaItem(procdefinition.Para.first), }
                  (po_leftright in procdefinition.procoptions),procdefinition.proccalloption,
                  para_alignment,para_offset);
           end;

         { Allocate return value for inlined routines }
         if inlined and
            (resulttype.def.size>0) then
           begin
             tg.GetTemp(exprasmlist,Align(resulttype.def.size,aktalignment.paraalign),tt_persistant,returnref);
             inlinecode.retoffset:=returnref.offset;
           end;

         { Allocate return value when returned in argument }
         if paramanager.ret_in_param(resulttype.def,procdefinition.proccalloption) then
           begin
             if assigned(funcretrefnode) then
              begin
                secondpass(funcretrefnode);
                if codegenerror then
                 exit;
                if (funcretrefnode.location.loc<>LOC_REFERENCE) then
                 internalerror(200204246);
                funcretref:=funcretrefnode.location.reference;
              end
             else
              begin
                if inlined then
                 begin
                   tg.GetTemp(exprasmlist,resulttype.def.size,tt_persistant,funcretref);
{$ifdef extdebug}
                   Comment(V_debug,'function return value is at offset '
                                   +tostr(funcretref.offset));
                   exprasmlist.concat(tai_comment.create(
                                       strpnew('function return value is at offset '
                                               +tostr(funcretref.offset))));
{$endif extdebug}
                 end
                else
                 tg.GetTemp(exprasmlist,resulttype.def.size,tt_normal,funcretref);
              end;

             { This must not be counted for C code
               complex return address is removed from stack
               by function itself !   }
{$ifdef OLD_C_STACK}
             inc(pushedparasize,4); { lets try without it PM }
{$endif not OLD_C_STACK}
             if inlined then
               begin
                  hregister:=cg.get_scratch_reg_address(exprasmlist);
                  cg.a_loadaddr_ref_reg(exprasmlist,funcretref,hregister);
                  reference_reset_base(href,procinfo.framepointer,inlinecode.retoffset);
                  cg.a_load_reg_ref(exprasmlist,OS_ADDR,hregister,href);
                  cg.free_scratch_reg(exprasmlist,hregister);
               end
             else
               cg.a_paramaddr_ref(exprasmlist,funcretref,
                 paramanager.getfuncretparaloc(procdefinition));
           end;

         { procedure variable or normal function call ? }
         if inlined or
            (right=nil) then
           begin
              { Normal function call }

{$ifdef dummy}
              { overloaded operator has no symtable }
              { push self }
              if assigned(symtableproc) and
                (symtableproc.symtabletype=withsymtable) then
                begin
                   { dirty trick to avoid the secondcall below }
                   methodpointer:=ccallparanode.create(nil,nil);
                   location_reset(methodpointer.location,LOC_REGISTER,OS_ADDR);
                   rg.getexplicitregisterint(exprasmlist,R_ESI);
                   methodpointer.location.register:=R_ESI;
                   { ARGHHH this is wrong !!!
                     if we can init from base class for a child
                     class that the wrong VMT will be
                     transfered to constructor !! }
                   methodpointer.resulttype:=
                     twithnode(twithsymtable(symtableproc).withnode).left.resulttype;
                   { make a reference }
                   href:=twithnode(twithsymtable(symtableproc).withnode).withreference;
                   if ((not(nf_islocal in twithnode(twithsymtable(symtableproc).withnode).flags)) and
                       (not twithsymtable(symtableproc).direct_with)) or
                      is_class_or_interface(methodpointer.resulttype.def) then
                     cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,self_pointer_reg)
                   else
                     cg.a_loadaddr_ref_reg(exprasmlist,href,self_pointer_reg);
                end;

              { push self }
              if assigned(symtableproc) and
                ((symtableproc.symtabletype=objectsymtable) or
                (symtableproc.symtabletype=withsymtable)) then
                begin
                   if assigned(methodpointer) then
                     begin
                        {
                        if methodpointer^.resulttype.def=classrefdef then
                          begin
                              two possibilities:
                               1. constructor
                               2. class method

                          end
                        else }
                          begin
                             case methodpointer.nodetype of
                               typen:
                                 begin
                                    { direct call to inherited method }
                                    if (po_abstractmethod in procdefinition.procoptions) then
                                      begin
                                         CGMessage(cg_e_cant_call_abstract_method);
                                         goto dont_call;
                                      end;
                                    { generate no virtual call }
                                    no_virtual_call:=true;

                                    if (sp_static in symtableprocentry.symoptions) then
                                      begin
                                         { well lets put the VMT address directly into ESI }
                                         { it is kind of dirty but that is the simplest    }
                                         { way to accept virtual static functions (PM)     }
                                         loadesi:=true;
                                         { if no VMT just use $0 bug0214 PM }
                                         rg.getexplicitregisterint(exprasmlist,R_ESI);
                                         if not(oo_has_vmt in tobjectdef(methodpointer.resulttype.def).objectoptions) then
                                           cg.a_load_const_reg(exprasmlist,OS_ADDR,0,self_pointer_reg)
                                         else
                                           begin
                                             reference_reset_symbol(href,objectlibrary.newasmsymbol(tobjectdef(methodpointer.resulttype.def).vmt_mangledname),0);
                                             cg.a_loadaddr_ref_reg(exprasmlist,href,self_pointer_reg);
                                           end;
                                         { emit_reg(A_PUSH,S_L,R_ESI);
                                           this is done below !! }
                                      end
                                    else
                                      { this is a member call, so ESI isn't modfied }
                                      loadesi:=false;

                                    { a class destructor needs a flag }
                                    if is_class(tobjectdef(methodpointer.resulttype.def)) and
                                       (procdefinition.proctypeoption=potype_destructor) then
                                      begin
                                        cg.a_param_const(exprasmlist,OS_ADDR,0,2);
                                        cg.a_param_reg(exprasmlist,OS_ADDR,self_pointer_reg,1);
                                      end;

                                    if not(is_con_or_destructor and
                                           is_class(methodpointer.resulttype.def) and
                                           (procdefinition.proctypeoption in [potype_constructor,potype_destructor])
                                          ) then
                                      cg.a_param_reg(exprasmlist,OS_ADDR,self_pointer_reg,1);
                                    { if an inherited con- or destructor should be  }
                                    { called in a con- or destructor then a warning }
                                    { will be made                                  }
                                    { con- and destructors need a pointer to the vmt }
                                    if is_con_or_destructor and
                                      is_object(methodpointer.resulttype.def) and
                                      assigned(aktprocdef) then
                                      begin
                                         if not(aktprocdef.proctypeoption in
                                                [potype_constructor,potype_destructor]) then
                                          CGMessage(cg_w_member_cd_call_from_method);
                                      end;
                                    { class destructors get there flag above }
                                    { constructor flags ?                    }
                                    if is_con_or_destructor and
                                      not(
                                        is_class(methodpointer.resulttype.def) and
                                        assigned(aktprocdef) and
                                        (aktprocdef.proctypeoption=potype_destructor)) then
                                      begin
                                         { a constructor needs also a flag }
                                         if is_class(methodpointer.resulttype.def) then
                                           cg.a_param_const(exprasmlist,OS_ADDR,0,2);
                                         cg.a_param_const(exprasmlist,OS_ADDR,0,1);
                                      end;
                                 end;
                               hnewn:
                                 begin
                                    { extended syntax of new }
                                    { ESI must be zero }
                                    rg.getexplicitregisterint(exprasmlist,R_ESI);
                                    cg.a_load_const_reg(exprasmlist,OS_ADDR,0,self_pointer_reg);
                                    cg.a_param_reg(exprasmlist,OS_ADDR,self_pointer_reg,2);
                                    { insert the vmt }
                                    reference_reset_symbol(href,objectlibrary.newasmsymbol(tobjectdef(methodpointer.resulttype.def).vmt_mangledname),0);
                                    cg.a_paramaddr_ref(exprasmlist,href,1);
                                    extended_new:=true;
                                 end;
                               hdisposen:
                                 begin
                                    secondpass(methodpointer);

                                    { destructor with extended syntax called from dispose }
                                    { hdisposen always deliver LOC_REFERENCE          }
                                    rg.getexplicitregisterint(exprasmlist,R_ESI);
                                    emit_ref_reg(A_LEA,S_L,methodpointer.location.reference,R_ESI);
                                    reference_release(exprasmlist,methodpointer.location.reference);
                                    cg.a_param_reg(exprasmlist,OS_ADDR,self_pointer_reg,2);
                                    reference_reset_symbol(href,objectlibrary.newasmsymbol(tobjectdef(methodpointer.resulttype.def).vmt_mangledname),0);
                                    cg.a_paramaddr_ref(exprasmlist,href,1);
                                 end;
                               else
                                 begin
                                    { call to an instance member }
                                    if (symtableproc.symtabletype<>withsymtable) then
                                      begin
                                         secondpass(methodpointer);
                                         rg.getexplicitregisterint(exprasmlist,R_ESI);
                                         case methodpointer.location.loc of
                                            LOC_CREGISTER,
                                            LOC_REGISTER:
                                              begin
                                                 cg.a_load_reg_reg(exprasmlist,OS_ADDR,OS_ADDR,methodpointer.location.register,R_ESI);
                                                 rg.ungetregisterint(exprasmlist,methodpointer.location.register);
                                              end;
                                            else
                                              begin
                                                 if (methodpointer.resulttype.def.deftype=classrefdef) or
                                                    is_class_or_interface(methodpointer.resulttype.def) then
                                                   cg.a_load_ref_reg(exprasmlist,OS_ADDR,methodpointer.location.reference,R_ESI)
                                                 else
                                                   cg.a_loadaddr_ref_reg(exprasmlist,methodpointer.location.reference,R_ESI);
                                                 reference_release(exprasmlist,methodpointer.location.reference);
                                              end;
                                         end;
                                      end;
                                    { when calling a class method, we have to load ESI with the VMT !
                                      But, not for a class method via self }
                                    if not(po_containsself in procdefinition.procoptions) then
                                      begin
                                        if (po_staticmethod in procdefinition.procoptions) or
                                           ((po_classmethod in procdefinition.procoptions) and
                                            not(methodpointer.resulttype.def.deftype=classrefdef)) then
                                          begin
                                            r.enum:=self_pointer_reg;
                                            rg.getexplicitregisterint(exprasmlist,r.enum);
                                            if not(oo_has_vmt in tprocdef(procdefinition)._class.objectoptions) then
                                              cg.a_load_const_reg(exprasmlist,OS_ADDR,0,r)
                                            else
                                              begin
                                                { class method and static methods needs current VMT }
                                                cg.g_maybe_testself(exprasmlist,r);
                                                reference_reset_base(href,r,tprocdef(procdefinition)._class.vmt_offset);
                                                cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,r);
                                                cg.g_maybe_testvmt(exprasmlist,r,tprocdef(procdefinition)._class);
                                              end;
                                          end;

                                        { direct call to destructor: remove data }
                                        if (procdefinition.proctypeoption=potype_destructor) and
                                           is_class(methodpointer.resulttype.def) then
                                          cg.a_param_const(exprasmlist,OS_INT,1,1);

                                        { direct call to class constructor, don't allocate memory }
                                        if (procdefinition.proctypeoption=potype_constructor) and
                                           is_class(methodpointer.resulttype.def) then
                                          begin
                                             cg.a_param_const(exprasmlist,OS_INT,0,2);
                                             cg.a_param_const(exprasmlist,OS_INT,0,1);
                                          end
                                        else
                                          begin
                                             { constructor call via classreference => allocate memory }
                                             if (procdefinition.proctypeoption=potype_constructor) and
                                                (methodpointer.resulttype.def.deftype=classrefdef) and
                                                is_class(tclassrefdef(methodpointer.resulttype.def).pointertype.def) then
                                               cg.a_param_const(exprasmlist,OS_INT,1,1);
                                             cg.a_param_reg(exprasmlist,OS_ADDR,self_pointer_reg,1);
                                          end;
                                      end;

                                    if is_con_or_destructor then
                                      begin
                                         { classes don't get a VMT pointer pushed }
                                         if is_object(methodpointer.resulttype.def) then
                                           begin
                                              if (procdefinition.proctypeoption=potype_constructor) then
                                                begin
                                                  { it's no bad idea, to insert the VMT }
                                                  reference_reset_symbol(href,objectlibrary.newasmsymbol(
                                                     tobjectdef(methodpointer.resulttype.def).vmt_mangledname),0);
                                                  cg.a_paramaddr_ref(exprasmlist,href,1);
                                                end
                                              { destructors haven't to dispose the instance, if this is }
                                              { a direct call                                           }
                                              else
                                                cg.a_param_const(exprasmlist,OS_INT,0,1);
                                           end;
                                      end;
                                 end;
                             end;
                          end;
                     end
                   else
                     begin
                        if (
                            (po_classmethod in procdefinition.procoptions) and
                            not(assigned(aktprocdef) and
                                (po_classmethod in aktprocdef.procoptions))
                           ) or
                           (
                            (po_staticmethod in procdefinition.procoptions) and
                             not(assigned(aktprocdef) and
                                 (po_staticmethod in aktprocdef.procoptions))
                           ) then
                          begin
                            r.enum:=self_pointer_reg;
                            rg.getexplicitregisterint(exprasmlist,r.enum);
                            if not(oo_has_vmt in tprocdef(procdefinition)._class.objectoptions) then
                             cg.a_load_const_reg(exprasmlist,OS_ADDR,0,r)
                            else
                             begin
                               { class method and static methods needs current VMT }
                               cg.g_maybe_testself(exprasmlist,r);
                               reference_reset_base(href,r,tprocdef(procdefinition)._class.vmt_offset);
                               cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,r);
                               cg.g_maybe_testvmt(exprasmlist,r,tprocdef(procdefinition)._class);
                             end;
                          end
                        else
                          begin
                             { member call, ESI isn't modified }
                             loadesi:=false;
                          end;
                        { direct call to destructor: don't remove data! }
                        if is_class(procinfo._class) then
                          begin
                             if (procdefinition.proctypeoption=potype_destructor) then
                               begin
                                  cg.a_param_const(exprasmlist,OS_INT,0,2);
                                  cg.a_param_reg(exprasmlist,OS_ADDR,R_ESI,1);
                               end
                             else if (procdefinition.proctypeoption=potype_constructor) then
                               begin
                                  cg.a_param_const(exprasmlist,OS_INT,0,2);
                                  cg.a_param_const(exprasmlist,OS_INT,0,1);
                               end
                             else
                               cg.a_param_reg(exprasmlist,OS_ADDR,R_ESI,1);
                          end
                        else if is_object(procinfo._class) then
                          begin
                             cg.a_param_reg(exprasmlist,OS_ADDR,R_ESI,1);
                             if is_con_or_destructor then
                               begin
                                  if (procdefinition.proctypeoption=potype_constructor) then
                                    begin
                                      { it's no bad idea, to insert the VMT }
                                      reference_reset_symbol(href,objectlibrary.newasmsymbol(procinfo._class.vmt_mangledname),0);
                                      cg.a_paramaddr_ref(exprasmlist,href,1);
                                    end
                                  { destructors haven't to dispose the instance, if this is }
                                  { a direct call                                           }
                                  else
                                    cg.a_param_const(exprasmlist,OS_INT,0,1);
                               end;
                          end
                        else
                          Internalerror(200006165);
                     end;
                end;
{$endif dummy}

                { call to BeforeDestruction? }
                if (procdefinition.proctypeoption=potype_destructor) and
                   assigned(methodpointer) and
                   (methodpointer.nodetype<>typen) and
                   is_class(tobjectdef(methodpointer.resulttype.def)) and
                   (inlined or
                   (right=nil)) then
                  begin
                     r.enum:=self_pointer_reg;
                     cg.a_param_reg(exprasmlist,OS_ADDR,r,paramanager.getintparaloc(1));
                     reference_reset_base(href,r,0);
                     tmpreg:=cg.get_scratch_reg_address(exprasmlist);
                     cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,tmpreg);
                     reference_reset_base(href,tmpreg,72);
                     cg.a_call_ref(exprasmlist,href);
                     cg.free_scratch_reg(exprasmlist,tmpreg);
                  end;
{$ifndef SPARC}{We don't need that on SPARC arch!}
              { push base pointer ?}
              { never when inlining, since if necessary, the base pointer }
              { can/will be gottten from the current procedure's symtable }
              { (JM)}
              if not inlined then
                if (lexlevel>=normal_function_level) and assigned(tprocdef(procdefinition).parast) and
                  ((tprocdef(procdefinition).parast.symtablelevel)>normal_function_level) then
                  load_framepointer;

              rg.saveintregvars(exprasmlist,regs_to_push_int);
              rg.saveotherregvars(exprasmlist,regs_to_push_other);
{$endif SPARC}

{$ifdef dummy}
              if (po_virtualmethod in procdefinition.procoptions) and
                 not(no_virtual_call) then
                begin
                   { static functions contain the vmt_address in ESI }
                   { also class methods                       }
                   { Here it is quite tricky because it also depends }
                   { on the methodpointer                        PM }
                   release_tmpreg:=false;
                   rg.getexplicitregisterint(exprasmlist,R_ESI);
                   if assigned(aktprocdef) then
                     begin
                       if (((sp_static in aktprocdef.procsym.symoptions) or
                        (po_classmethod in aktprocdef.procoptions)) and
                        ((methodpointer=nil) or (methodpointer.nodetype=typen)))
                        or
                        (po_staticmethod in procdefinition.procoptions) or
                        ((procdefinition.proctypeoption=potype_constructor) and
                        { esi contains the vmt if we call a constructor via a class ref }
                         assigned(methodpointer) and
                         (methodpointer.resulttype.def.deftype=classrefdef)
                        ) or
                        { is_interface(tprocdef(procdefinition)._class) or }
                        { ESI is loaded earlier }
                        (po_classmethod in procdefinition.procoptions) then
                         begin
                            reference_reset_base(href,R_ESI,0);
                         end
                       else
                         begin
                            { this is one point where we need vmt_offset (PM) }
                            reference_reset_base(href,R_ESI,tprocdef(procdefinition)._class.vmt_offset);
                            cg.a_maybe_testself(exprasmlist);
                            tmpreg:=cg.get_scratch_reg_address(exprasmlist);
                            cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,tmpreg);
                            reference_reset_base(href,tmpreg,0);
                            release_tmpreg:=true;
                         end;
                     end
                   else
                     { aktprocdef should be assigned, also in main program }
                     internalerror(12345);

                   if tprocdef(procdefinition).extnumber=-1 then
                     internalerror(44584);

                   href.offset:=tprocdef(procdefinition)._class.vmtmethodoffset(tprocdef(procdefinition).extnumber);
                   if not(is_interface(tprocdef(procdefinition)._class)) and
                      not(is_cppclass(tprocdef(procdefinition)._class)) then
                     cg.g_maybe_testvmt(exprasmlist,href.base,tprocdef(procdefinition)._class);
                   cg.a_call_ref(exprasmlist,href);
                   if release_tmpreg then
                     cg.free_scratch_reg(exprasmlist,tmpreg);
                end
              else
{$endif dummy}
              if not inlined then
                begin
                  { We can call interrupts from within the smae code
                    by just pushing the flags and CS PM }
                  if (po_interrupt in procdefinition.procoptions) then
                    extra_interrupt_code;
                  cg.a_call_name(exprasmlist,tprocdef(procdefinition).mangledname);
                end
              else { inlined proc }
                { inlined code is in inlinecode }
                begin
                   { process the inlinecode }
                   secondpass(tnode(inlinecode));
                   { free the args }
                   if tprocdef(procdefinition).parast.datasize>0 then
                     tg.UnGetTemp(exprasmlist,pararef);
                end;
           end
         else
           { now procedure variable case }
           begin
              secondpass(right);
              if (po_interrupt in procdefinition.procoptions) then
                extra_interrupt_code;
              { procedure of object? }
              if (po_methodpointer in procdefinition.procoptions) then
                begin
{$ifdef dummy}
                   { method pointer can't be in a register }
                   hregister:=R_NO;

                   { do some hacking if we call a method pointer }
                   { which is a class member                 }
                   { else ESI is overwritten !             }
                   if (right.location.reference.base=R_ESI) or
                      (right.location.reference.index=R_ESI) then
                     begin
                        reference_release(exprasmlist,right.location.reference);
                        hregister:=cg.get_scratch_reg_address(exprasmlist);
                        cg.a_load_ref_reg(exprasmlist,OS_ADDR,right.location.reference,hregister);
                     end;

                   { load self, but not if it's already explicitly pushed }
                   if not(po_containsself in procdefinition.procoptions) then
                     begin
                       { load ESI }
                       href:=right.location.reference;
                       inc(href.offset,4);
                       rg.getexplicitregisterint(exprasmlist,R_ESI);
                       cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,self_pointer_reg);
                       { push self pointer }
                       cg.a_param_reg(exprasmlist,OS_ADDR,self_pointer_reg,-1);
                     end;

                   rg.saveregvars(exprasmlist,ALL_REGISTERS);
                   if hregister<>R_NO then
                     cg.a_call_reg(exprasmlist,hregister)
                   else
                     cg.a_call_ref(exprasmlist,right.location.reference);

                   if hregister<>R_NO then
                     cg.free_scratch_reg(exprasmlist,hregister);
                   reference_release(exprasmlist,right.location.reference);
                   tg.Ungetiftemp(exprasmlist,right.location.reference);
{$endif dummy}
                end
              else
                begin
                   rg.saveintregvars(exprasmlist,ALL_INTREGISTERS);
                   rg.saveotherregvars(exprasmlist,ALL_REGISTERS);
                   cg.a_call_loc(exprasmlist,right.location);
                   location_release(exprasmlist,right.location);
                   location_freetemp(exprasmlist,right.location);
                end;
           end;

{$ifdef dummy}
           { this was only for normal functions
             displaced here so we also get
             it to work for procvars PM }
           if (not inlined) and (po_clearstack in procdefinition.procoptions) then
             begin
                { we also add the pop_size which is included in pushedparasize }
                pop_size:=0;
                { better than an add on all processors }
                if pushedparasize=4 then
                  begin
                    rg.getexplicitregisterint(exprasmlist,R_EDI);
                    emit_reg(A_POP,S_L,R_EDI);
                    rg.ungetregisterint(exprasmlist,R_EDI);
                  end
                { the pentium has two pipes and pop reg is pairable }
                { but the registers must be different!        }
                else if (pushedparasize=8) and
                  not(cs_littlesize in aktglobalswitches) and
{$ifdef i386}
                  (aktoptprocessor=ClassP5) and
{$endif}
                  (procinfo._class=nil) then
                    begin
                       rg.getexplicitregisterint(exprasmlist,R_EDI);
                       emit_reg(A_POP,S_L,R_EDI);
                       rg.ungetregisterint(exprasmlist,R_EDI);
                       exprasmList.concat(tai_regalloc.Alloc(R_ESI));
                       emit_reg(A_POP,S_L,R_ESI);
                       exprasmList.concat(tai_regalloc.DeAlloc(R_ESI));
                    end
                else if pushedparasize<>0 then
                  emit_const_reg(A_ADD,S_L,pushedparasize,R_ESP);
             end;
{$endif dummy}

{$ifdef powerpc}
         { this calculation must be done in pass_1 anyway, so don't worry }
         if tppcprocinfo(procinfo).maxpushedparasize<pushedparasize then
           tppcprocinfo(procinfo).maxpushedparasize:=pushedparasize;
{$endif powerpc}
{$ifdef OPTALIGN}
         r.enum:=R_ESP;
         if pop_esp then
           emit_reg(A_POP,S_L,r);
{$endif OPTALIGN}
      dont_call:
         pushedparasize:=oldpushedparasize;
         rg.restoreunusedstate(unusedstate);
{$ifdef TEMPREGDEBUG}
         testregisters32;
{$endif TEMPREGDEBUG}

         { a constructor could be a function with boolean result }
         { if calling constructor called fail we
           must jump directly to quickexitlabel  PM
           but only if it is a call of an inherited constructor }
         if (inlined or
             (right=nil)) and
            (procdefinition.proctypeoption=potype_constructor) and
            assigned(methodpointer) and
            (methodpointer.nodetype=typen) and
            (aktprocdef.proctypeoption=potype_constructor) then
           begin
              r.enum:=accumulator;
              cg.a_cmp_const_reg_label(exprasmlist,OS_ADDR,OC_EQ,0,r,faillabel);
           end;

         { call to AfterConstruction? }
         if is_class(resulttype.def) and
           (inlined or
           (right=nil)) and
           (procdefinition.proctypeoption=potype_constructor) and
           assigned(methodpointer) and
           (methodpointer.nodetype<>typen) then
           begin
              objectlibrary.getlabel(constructorfailed);
              r.enum:=self_pointer_reg;
              r2.enum:=accumulator;
              cg.a_cmp_const_reg_label(exprasmlist,OS_ADDR,OC_EQ,0,r,constructorfailed);
              cg.a_param_reg(exprasmlist,OS_ADDR,r2,paramanager.getintparaloc(1));
              reference_reset_base(href,r,0);
              tmpreg:=cg.get_scratch_reg_address(exprasmlist);
              cg.a_load_ref_reg(exprasmlist,OS_ADDR,href,tmpreg);
              reference_reset_base(href,tmpreg,17*pointer_size);
              cg.a_call_ref(exprasmlist,href);
              cg.free_scratch_reg(exprasmlist,tmpreg);
              exprasmList.concat(tai_regalloc.Alloc(r2));
              cg.a_label(exprasmlist,constructorfailed);
              cg.a_load_reg_reg(exprasmlist,OS_ADDR,OS_ADDR,r,r2);
           end;

         { handle function results }
         if (not is_void(resulttype.def)) then
          handle_return_value(inlined,extended_new);

         { perhaps i/o check ? }
         if iolabel<>nil then
           begin
              reference_reset_symbol(href,iolabel,0);
              cg.a_paramaddr_ref(exprasmlist,href,paramanager.getintparaloc(1));
              cg.a_call_name(exprasmlist,'FPC_IOCHECK');
           end;

{$ifdef i386}
         r.enum:=R_ESP;
         if pop_size>0 then
           emit_const_reg(A_ADD,S_L,pop_size,r);
{$endif i386}

         { restore registers }
         rg.restoreusedotherregisters(exprasmlist,pushed);
         rg.restoreusedintregisters(exprasmlist,pushedint);

         { at last, restore instance pointer (SELF) }
         if loadesi then
           cg.g_maybe_loadself(exprasmlist);
         pp:=tbinarynode(params);
         while assigned(pp) do
           begin
              if assigned(pp.left) then
                begin
                  location_freetemp(exprasmlist,pp.left.location);
                  { process also all nodes of an array of const }
                  if pp.left.nodetype=arrayconstructorn then
                    begin
                      if assigned(tarrayconstructornode(pp.left).left) then
                       begin
                         hp:=pp.left;
                         while assigned(hp) do
                          begin
                            location_freetemp(exprasmlist,tarrayconstructornode(hp).left.location);
                            hp:=tarrayconstructornode(hp).right;
                          end;
                       end;
                    end;
                end;
              pp:=tbinarynode(pp.right);
           end;
         if inlined then
           begin
             if (resulttype.def.size>0) then
               tg.UnGetTemp(exprasmlist,returnref);
             tprocdef(procdefinition).parast.address_fixup:=store_parast_fixup;
             right:=inlinecode;
           end;
         if assigned(params) then
           params.free;

         { from now on the result can be freed normally }
         if inlined and paramanager.ret_in_param(resulttype.def,procdefinition.proccalloption) then
           tg.ChangeTempType(exprasmlist,funcretref,tt_normal);

         { if return value is not used }
         if (not(nf_return_value_used in flags)) and (not is_void(resulttype.def)) then
           begin
              if location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then
                begin
                   { data which must be finalized ? }
                   if (resulttype.def.needs_inittable) then
                      cg.g_finalize(exprasmlist,resulttype.def,location.reference,false);
                   { release unused temp }
                   tg.ungetiftemp(exprasmlist,location.reference)
                end
              else if location.loc=LOC_FPUREGISTER then
                begin
{$ifdef i386}
                  { release FPU stack }
                  r.enum:=R_ST;
                  emit_reg(A_FSTP,S_NO,r);
                  {
                    dec(trgcpu(rg).fpuvaroffset);
                    do NOT decrement as the increment before
                    is not called for unused results PM }
{$endif i386}
                end;
           end;
      end;



{*****************************************************************************
                             TCGPROCINLINENODE
*****************************************************************************}


    procedure tcgprocinlinenode.pass_2;
       var st : tsymtable;
           oldprocdef : tprocdef;
           ps, i : longint;
           tmpreg: tregister;
           oldprocinfo : tprocinfo;
           oldinlining_procedure,
           nostackframe,make_global : boolean;
           inlineentrycode,inlineexitcode : TAAsmoutput;
           oldexitlabel,oldexit2label,oldquickexitlabel:tasmlabel;
           oldregstate: pointer;
           localsref : treference;
{$ifdef GDB}
           startlabel,endlabel : tasmlabel;
           pp : pchar;
           mangled_length  : longint;
{$endif GDB}
       begin
          { deallocate the registers used for the current procedure's regvars }
          if assigned(aktprocdef.regvarinfo) then
            begin
              with pregvarinfo(aktprocdef.regvarinfo)^ do
                for i := 1 to maxvarregs do
                  if assigned(regvars[i]) then
                    store_regvar(exprasmlist,regvars[i].reg);
              rg.saveStateForInline(oldregstate);
              { make sure the register allocator knows what the regvars in the }
              { inlined code block are (JM)                                    }
              rg.resetusableregisters;
              rg.clearregistercount;
              rg.cleartempgen;
              if assigned(inlineprocdef.regvarinfo) then
                with pregvarinfo(inlineprocdef.regvarinfo)^ do
                  for i := 1 to maxvarregs do
                    if assigned(regvars[i]) then
                      begin
                        tmpreg:=rg.makeregsize(regvars[i].reg,OS_INT);
                        {Fix me!!}
{                        rg.makeregvar(tmpreg);}
                        internalerror(200301232);
                      end;
            end;
          oldinlining_procedure:=inlining_procedure;
          oldexitlabel:=aktexitlabel;
          oldexit2label:=aktexit2label;
          oldquickexitlabel:=quickexitlabel;
          oldprocdef:=aktprocdef;
          oldprocinfo:=procinfo;
          objectlibrary.getlabel(aktexitlabel);
          objectlibrary.getlabel(aktexit2label);
          { we're inlining a procedure }
          inlining_procedure:=true;
          aktprocdef:=inlineprocdef;

          { clone procinfo, but not the asmlists }
          procinfo:=tprocinfo(cprocinfo.newinstance);
          move(pointer(oldprocinfo)^,pointer(procinfo)^,cprocinfo.InstanceSize);
          procinfo.aktentrycode:=nil;
          procinfo.aktexitcode:=nil;
          procinfo.aktproccode:=nil;
          procinfo.aktlocaldata:=nil;

          { set new procinfo }
          procinfo.return_offset:=retoffset;
          procinfo.para_offset:=para_offset;
          procinfo.no_fast_exit:=false;

          { arg space has been filled by the parent secondcall }
          st:=aktprocdef.localst;
          { set it to the same lexical level }
          st.symtablelevel:=oldprocdef.localst.symtablelevel;
          if st.datasize>0 then
            begin
              tg.GetTemp(exprasmlist,st.datasize,tt_persistant,localsref);
              st.address_fixup:=localsref.offset+st.datasize;
{$ifdef extdebug}
              Comment(V_debug,'local symtable is at offset '+tostr(st.address_fixup));
              exprasmList.concat(tai_comment.Create(strpnew(
                'local symtable is at offset '+tostr(st.address_fixup))));
{$endif extdebug}
            end;
          exprasmList.concat(Tai_Marker.Create(InlineStart));
{$ifdef extdebug}
          exprasmList.concat(tai_comment.Create(strpnew('Start of inlined proc')));
{$endif extdebug}
{$ifdef GDB}
          if (cs_debuginfo in aktmoduleswitches) then
            begin
              objectlibrary.getaddrlabel(startlabel);
              objectlibrary.getaddrlabel(endlabel);
              cg.a_label(exprasmlist,startlabel);
              inlineprocdef.localst.symtabletype:=inlinelocalsymtable;
              inlineprocdef.parast.symtabletype:=inlineparasymtable;

              { Here we must include the para and local symtable info }
              inlineprocdef.concatstabto(withdebuglist);

              { set it back for safety }
              inlineprocdef.localst.symtabletype:=localsymtable;
              inlineprocdef.parast.symtabletype:=parasymtable;

              mangled_length:=length(oldprocdef.mangledname);
              getmem(pp,mangled_length+50);
              strpcopy(pp,'192,0,0,'+startlabel.name);
              if (target_info.use_function_relative_addresses) then
                begin
                  strpcopy(strend(pp),'-');
                  strpcopy(strend(pp),oldprocdef.mangledname);
                end;
              withdebugList.concat(Tai_stabn.Create(strnew(pp)));
            end;
{$endif GDB}
          { takes care of local data initialization }
          inlineentrycode:=TAAsmoutput.Create;
          inlineexitcode:=TAAsmoutput.Create;
          ps:=para_size;
          make_global:=false; { to avoid warning }
          genentrycode(inlineentrycode,make_global,0,ps,nostackframe,true);
          if po_assembler in aktprocdef.procoptions then
            inlineentrycode.insert(Tai_marker.Create(asmblockstart));
          exprasmList.concatlist(inlineentrycode);
          secondpass(inlinetree);
          genexitcode(inlineexitcode,0,false,true);
          if po_assembler in aktprocdef.procoptions then
            inlineexitcode.concat(Tai_marker.Create(asmblockend));
          exprasmList.concatlist(inlineexitcode);

          inlineentrycode.free;
          inlineexitcode.free;
{$ifdef extdebug}
          exprasmList.concat(tai_comment.Create(strpnew('End of inlined proc')));
{$endif extdebug}
          exprasmList.concat(Tai_Marker.Create(InlineEnd));

          {we can free the local data now, reset also the fixup address }
          if st.datasize>0 then
            begin
              tg.UnGetTemp(exprasmlist,localsref);
              st.address_fixup:=0;
            end;
          { restore procinfo }
          procinfo.free;
          procinfo:=oldprocinfo;
{$ifdef GDB}
          if (cs_debuginfo in aktmoduleswitches) then
            begin
              cg.a_label(exprasmlist,endlabel);
              strpcopy(pp,'224,0,0,'+endlabel.name);
             if (target_info.use_function_relative_addresses) then
               begin
                 strpcopy(strend(pp),'-');
                 strpcopy(strend(pp),oldprocdef.mangledname);
               end;
              withdebugList.concat(Tai_stabn.Create(strnew(pp)));
              freemem(pp,mangled_length+50);
            end;
{$endif GDB}
          { restore }
          aktprocdef:=oldprocdef;
          aktexitlabel:=oldexitlabel;
          aktexit2label:=oldexit2label;
          quickexitlabel:=oldquickexitlabel;
          inlining_procedure:=oldinlining_procedure;

          { reallocate the registers used for the current procedure's regvars, }
          { since they may have been used and then deallocated in the inlined  }
          { procedure (JM)                                                     }
          if assigned(aktprocdef.regvarinfo) then
            begin
              rg.restoreStateAfterInline(oldregstate);
            end;
       end;


begin
   ccallparanode:=tcgcallparanode;
   ccallnode:=tcgcallnode;
   cprocinlinenode:=tcgprocinlinenode;
end.
{
  $Log$
  Revision 1.39  2003-02-19 22:00:14  daniel
    * Code generator converted to new register notation
    - Horribily outdated todo.txt removed

  Revision 1.38  2003/02/15 22:17:38  carl
   * bugfix of FPU emulation code

  Revision 1.37  2003/02/12 22:10:07  carl
    * load_frame_pointer is now generic
    * change fpu emulation routine names

  Revision 1.36  2003/01/30 21:46:57  peter
    * self fixes for static methods (merged)

  Revision 1.35  2003/01/22 20:45:15  mazen
  * making math code in RTL compiling.
  *NB : This does NOT mean necessary that it will generate correct code!

  Revision 1.34  2003/01/17 12:03:45  daniel
    * Optalign conditional code adapted to record Tregister

  Revision 1.33  2003/01/08 18:43:56  daniel
   * Tregister changed into a record

  Revision 1.32  2002/12/15 22:50:00  florian
    + some stuff for the new hidden parameter handling added

  Revision 1.31  2002/12/15 21:30:12  florian
    * tcallnode.paraitem introduced, all references to defcoll removed

  Revision 1.30  2002/11/27 20:04:39  peter
    * cdecl array of const fixes

  Revision 1.29  2002/11/25 17:43:17  peter
    * splitted defbase in defutil,symutil,defcmp
    * merged isconvertable and is_equal into compare_defs(_ext)
    * made operator search faster by walking the list only once

  Revision 1.28  2002/11/18 17:31:54  peter
    * pass proccalloption to ret_in_xxx and push_xxx functions

  Revision 1.27  2002/11/16 15:34:30  florian
    * generic location for float results

  Revision 1.26  2002/11/15 01:58:51  peter
    * merged changes from 1.0.7 up to 04-11
      - -V option for generating bug report tracing
      - more tracing for option parsing
      - errors for cdecl and high()
      - win32 import stabs
      - win32 records<=8 are returned in eax:edx (turned off by default)
      - heaptrc update
      - more info for temp management in .s file with EXTDEBUG

  Revision 1.25  2002/10/05 12:43:25  carl
    * fixes for Delphi 6 compilation
     (warning : Some features do not work under Delphi)

  Revision 1.24  2002/09/30 07:00:45  florian
    * fixes to common code to get the alpha compiler compiled applied

  Revision 1.23  2002/09/17 18:54:02  jonas
    * a_load_reg_reg() now has two size parameters: source and dest. This
      allows some optimizations on architectures that don't encode the
      register size in the register name.

  Revision 1.22  2002/09/07 15:25:02  peter
    * old logs removed and tabs fixed

  Revision 1.21  2002/09/07 11:50:02  jonas
    * fixed small regalloction info bug

  Revision 1.20  2002/09/02 11:25:20  florian
    * fixed generic procedure variable calling

  Revision 1.19  2002/09/01 21:04:48  florian
    * several powerpc related stuff fixed

  Revision 1.18  2002/09/01 18:43:27  peter
    * include accumulator in regs_to_push list

  Revision 1.17  2002/09/01 12:13:00  peter
    * use a_call_reg
    * ungetiftemp for procvar of object temp

  Revision 1.16  2002/08/25 19:25:18  peter
    * sym.insert_in_data removed
    * symtable.insertvardata/insertconstdata added
    * removed insert_in_data call from symtable.insert, it needs to be
      called separatly. This allows to deref the address calculation
    * procedures now calculate the parast addresses after the procedure
      directives are parsed. This fixes the cdecl parast problem
    * push_addr_param has an extra argument that specifies if cdecl is used
      or not

  Revision 1.15  2002/08/23 16:14:48  peter
    * tempgen cleanup
    * tt_noreuse temp type added that will be used in genentrycode

  Revision 1.14  2002/08/20 16:55:38  peter
    * don't write (stabs)line info when inlining a procedure

  Revision 1.13  2002/08/19 19:36:42  peter
    * More fixes for cross unit inlining, all tnodes are now implemented
    * Moved pocall_internconst to po_internconst because it is not a
      calling type at all and it conflicted when inlining of these small
      functions was requested

  Revision 1.12  2002/08/18 20:06:23  peter
    * inlining is now also allowed in interface
    * renamed write/load to ppuwrite/ppuload
    * tnode storing in ppu
    * nld,ncon,nbas are already updated for storing in ppu

  Revision 1.11  2002/08/17 22:09:44  florian
    * result type handling in tcgcal.pass_2 overhauled
    * better tnode.dowrite
    * some ppc stuff fixed

  Revision 1.10  2002/08/17 09:23:35  florian
    * first part of procinfo rewrite

  Revision 1.9  2002/08/13 21:40:55  florian
    * more fixes for ppc calling conventions

  Revision 1.8  2002/08/13 18:01:51  carl
    * rename swatoperands to swapoperands
    + m68k first compilable version (still needs a lot of testing):
        assembler generator, system information , inline
        assembler reader.

  Revision 1.7  2002/08/12 15:08:39  carl
    + stab register indexes for powerpc (moved from gdb to cpubase)
    + tprocessor enumeration moved to cpuinfo
    + linker in target_info is now a class
    * many many updates for m68k (will soon start to compile)
    - removed some ifdef or correct them for correct cpu

  Revision 1.6  2002/08/11 14:32:26  peter
    * renamed current_library to objectlibrary

  Revision 1.5  2002/08/11 13:24:11  peter
    * saving of asmsymbols in ppu supported
    * asmsymbollist global is removed and moved into a new class
      tasmlibrarydata that will hold the info of a .a file which
      corresponds with a single module. Added librarydata to tmodule
      to keep the library info stored for the module. In the future the
      objectfiles will also be stored to the tasmlibrarydata class
    * all getlabel/newasmsymbol and friends are moved to the new class

  Revision 1.4  2002/08/06 20:55:20  florian
    * first part of ppc calling conventions fix

  Revision 1.3  2002/07/20 11:57:53  florian
    * types.pas renamed to defbase.pas because D6 contains a types
      unit so this would conflicts if D6 programms are compiled
    + Willamette/SSE2 instructions to assembler added

  Revision 1.2  2002/07/13 19:38:43  florian
    * some more generic calling stuff fixed

}