freepascal.compiler/compiler/ninl.pas

{
    $Id$
    Copyright (c) 1998-2002 by Florian Klaempfl

    Type checking and register allocation for inline 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 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 ninl;

{$i fpcdefs.inc}

interface

    uses
       node,htypechk,cpuinfo,symtype;

    {$i compinnr.inc}

    type
       tinlinenode = class(tunarynode)
          inlinenumber : byte;
          constructor create(number : byte;is_const:boolean;l : tnode);virtual;
          constructor ppuload(t:tnodetype;ppufile:tcompilerppufile);override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function getcopy : tnode;override;
          function pass_1 : tnode;override;
          function det_resulttype:tnode;override;
          function docompare(p: tnode): boolean; override;
          { All the following routines currently
            call compilerproc's, unless they are
            overriden in which case, the code
            generator handles them.
          }
          function first_pi: tnode ; virtual;
          function first_arctan_real: tnode; virtual;
          function first_abs_real: tnode; virtual;
          function first_sqr_real: tnode; virtual;
          function first_sqrt_real: tnode; virtual;
          function first_ln_real: tnode; virtual;
          function first_cos_real: tnode; virtual;
          function first_sin_real: tnode; virtual;
        private
          function handle_str: tnode;
          function handle_reset_rewrite_typed: tnode;
          function handle_read_write: tnode;
          function handle_val: tnode;
       end;
       tinlinenodeclass = class of tinlinenode;

    var
       cinlinenode : tinlinenodeclass;

   function geninlinenode(number : byte;is_const:boolean;l : tnode) : tinlinenode;

implementation

    uses
      verbose,globals,systems,
      globtype, cutils,
      symbase,symconst,symdef,symsym,symtable,paramgr,defutil,defcmp,
      pass_1,
      ncal,ncon,ncnv,nadd,nld,nbas,nflw,nmem,nmat,nutils,
      cgbase,procinfo
      ;

   function geninlinenode(number : byte;is_const:boolean;l : tnode) : tinlinenode;

     begin
        geninlinenode:=cinlinenode.create(number,is_const,l);
     end;

{*****************************************************************************
                           TINLINENODE
*****************************************************************************}

    constructor tinlinenode.create(number : byte;is_const:boolean;l : tnode);

      begin
         inherited create(inlinen,l);
         if is_const then
           include(flags,nf_inlineconst);
         inlinenumber:=number;
      end;


    constructor tinlinenode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
      begin
        inherited ppuload(t,ppufile);
        inlinenumber:=ppufile.getbyte;
      end;


    procedure tinlinenode.ppuwrite(ppufile:tcompilerppufile);
      begin
        inherited ppuwrite(ppufile);
        ppufile.putbyte(inlinenumber);
      end;


    function tinlinenode.getcopy : tnode;
      var
         n : tinlinenode;
      begin
         n:=tinlinenode(inherited getcopy);
         n.inlinenumber:=inlinenumber;
         result:=n;
      end;


      function tinlinenode.handle_str : tnode;
      var
        lenpara,
        fracpara,
        newparas,
        dest,
        source  : tcallparanode;
        procname: string;
        is_real : boolean;

      begin
        result := cerrornode.create;

        { make sure we got at least two parameters (if we got only one, }
        { this parameter may not be encapsulated in a callparan)        }
        if not assigned(left) or
           (left.nodetype <> callparan) then
          begin
            CGMessage(parser_e_wrong_parameter_size);
            exit;
          end;
        { get destination string }
        dest := tcallparanode(left);

        { get source para (number) }
        source := dest;
        while assigned(source.right) do
          source := tcallparanode(source.right);
        is_real := source.resulttype.def.deftype = floatdef;

        if not assigned(dest) or
           ((dest.left.resulttype.def.deftype<>stringdef) and
            not(is_chararray(dest.left.resulttype.def))) or
           not(is_real or
               (source.left.resulttype.def.deftype = orddef)) then
          begin
            { the parser will give this message already because we }
            { return an errornode (JM)                             }
            { CGMessagePos(fileinfo,parser_e_illegal_expression);      }
            exit;
          end;

        { get len/frac parameters }
        lenpara := nil;
        fracpara := nil;
        if (cpf_is_colon_para in tcallparanode(dest.right).callparaflags) then
          begin
            lenpara := tcallparanode(dest.right);

            { we can let the callnode do the type checking of these parameters too, }
            { but then the error messages aren't as nice                            }
            if not is_integer(lenpara.resulttype.def) then
              begin
                CGMessagePos1(lenpara.fileinfo,
                  type_e_integer_expr_expected,lenpara.resulttype.def.typename);
                exit;
              end;
            if (cpf_is_colon_para in tcallparanode(lenpara.right).callparaflags) then
              begin
                { parameters are in reverse order! }
                fracpara := lenpara;
                lenpara := tcallparanode(lenpara.right);
                if not is_real then
                  begin
                    CGMessagePos(lenpara.fileinfo,parser_e_illegal_colon_qualifier);
                    exit
                  end;
                if not is_integer(lenpara.resulttype.def) then
                  begin
                    CGMessagePos1(lenpara.fileinfo,
                      type_e_integer_expr_expected,lenpara.resulttype.def.typename);
                    exit;
                  end;
              end;
          end;

        { generate the parameter list for the compilerproc }
        newparas := dest;

        { if we have a float parameter, insert the realtype, len and fracpara parameters }
        if is_real then
          begin
            { insert realtype parameter }
            newparas.right := ccallparanode.create(cordconstnode.create(
              ord(tfloatdef(source.left.resulttype.def).typ),s32inttype,true),
               newparas.right);
            { if necessary, insert a fraction parameter }
            if not assigned(fracpara) then
              begin
                tcallparanode(newparas.right).right := ccallparanode.create(
                  cordconstnode.create(-1,s32inttype,false),
                   tcallparanode(newparas.right).right);
                fracpara := tcallparanode(tcallparanode(newparas.right).right);
              end;
            { if necessary, insert a length para }
            if not assigned(lenpara) then
              fracpara.right := ccallparanode.create(
                cordconstnode.create(-32767,s32inttype,false),
                   fracpara.right);
          end
        else
          { for a normal parameter, insert a only length parameter if one is missing }
          if not assigned(lenpara) then
            newparas.right := ccallparanode.create(cordconstnode.create(-1,s32inttype,false),
              newparas.right);

        { remove the parameters from the original node so they won't get disposed, }
        { since they're reused                                                     }
        left := nil;

        { create procedure name }
        if is_chararray(dest.resulttype.def) then
          procname:='fpc_chararray_'
        else
          procname := 'fpc_' + tstringdef(dest.resulttype.def).stringtypname+'_';
        if is_real then
          procname := procname + 'float'
        else
          case torddef(source.resulttype.def).typ of
{$ifdef cpu64bit}
            u64bit:
              procname := procname + 'uint';
{$else}
            u32bit:
              procname := procname + 'uint';
            u64bit:
              procname := procname + 'qword';
            scurrency,
            s64bit:
              procname := procname + 'int64';
{$endif}
            else
              procname := procname + 'sint';
          end;

        { free the errornode we generated in the beginning }
        result.free;
        { create the call node, }
        result := ccallnode.createintern(procname,newparas);
      end;


    function tinlinenode.handle_reset_rewrite_typed: tnode;
      begin
        { since this is a "in_xxxx_typedfile" node, we can be sure we have  }
        { a typed file as argument and we don't have to check it again (JM) }

        { add the recsize parameter }
        { note: for some reason, the parameter of intern procedures with only one }
        {   parameter is gets lifted out of its original tcallparanode (see round }
        {   line 1306 of ncal.pas), so recreate a tcallparanode here (JM)         }
        left := ccallparanode.create(cordconstnode.create(
          tfiledef(left.resulttype.def).typedfiletype.def.size,s32inttype,true),
          ccallparanode.create(left,nil));
        { create the correct call }
        if inlinenumber=in_reset_typedfile then
          result := ccallnode.createintern('fpc_reset_typed',left)
        else
          result := ccallnode.createintern('fpc_rewrite_typed',left);
        { make sure left doesn't get disposed, since we use it in the new call }
        left := nil;
      end;


    function tinlinenode.handle_read_write: tnode;

      const
{$ifdef cpu64bit}
        hasownreadfunc = [uchar,uwidechar,bool8bit,bool16bit,bool32bit];
{$else cpu64bit}
        hasownreadfunc = [uchar,uwidechar,bool8bit,bool16bit,bool32bit,s64bit,u64bit];
{$endif cpu64bit}

        procnames: array[boolean,boolean] of string[11] =
          (('write_text_','read_text_'),('typed_write','typed_read'));

      var
        filepara,
        lenpara,
        fracpara,
        nextpara,
        para          : tcallparanode;
        newstatement  : tstatementnode;
        newblock      : tblocknode;
        p1            : tnode;
        filetemp,
        temp          : ttempcreatenode;
        procprefix,
        name          : string[31];
        srsym         : tvarsym;
        tempowner     : tsymtable;
        restype       : ^ttype;
        is_typed,
        do_read,
        is_real,
        error_para,
        found_error,
        is_ordinal   : boolean;
      begin
        filepara := nil;
        is_typed := false;
        filetemp := nil;
        do_read := inlinenumber in [in_read_x,in_readln_x];
        { if we fail, we can quickly exit this way. We must generate something }
        { instead of the inline node, because firstpass will bomb with an      }
        { internalerror if it encounters a read/write                          }
        result := cerrornode.create;

        { reverse the parameters (needed to get the colon parameters in the }
        { correct order when processing write(ln)                           }
        left := reverseparameters(tcallparanode(left));

        if assigned(left) then
          begin
            { check if we have a file parameter and if yes, what kind it is }
            filepara := tcallparanode(left);

            if (filepara.resulttype.def.deftype=filedef) then
              begin
                if (tfiledef(filepara.resulttype.def).filetyp=ft_untyped) then
                  begin
                    CGMessagePos(fileinfo,type_e_no_read_write_for_untyped_file);
                    exit;
                  end
                else
                  begin
                    if (tfiledef(filepara.resulttype.def).filetyp=ft_typed) then
                      begin
                        if (inlinenumber in [in_readln_x,in_writeln_x]) then
                          begin
                            CGMessagePos(fileinfo,type_e_no_readln_writeln_for_typed_file);
                            exit;
                          end;
                        is_typed := true;
                      end
                  end;
              end
            else
              filepara := nil;
          end;

        { create a blocknode in which the successive write/read statements will be  }
        { put, since they belong together. Also create a dummy statement already to }
        { make inserting of additional statements easier                            }
        newblock:=internalstatements(newstatement);

        { if we don't have a filepara, create one containing the default }
        if not assigned(filepara) then
          begin
            { retrieve the symbols for standard input/output handle }
            if do_read then
              name := 'INPUT'
            else
              name := 'OUTPUT';
            if not searchsysvar(name,srsym,tempowner) then
              internalerror(200108141);

            { since the input/output variables are threadvars loading them into
              a temp once is faster. Create a temp which will hold a pointer to the file }
            filetemp := ctempcreatenode.create_reg(voidpointertype,voidpointertype.def.size,tt_persistent);
            addstatement(newstatement,filetemp);

            { make sure the resulttype of the temp (and as such of the }
            { temprefs coming after it) is set (necessary because the  }
            { temprefs will be part of the filepara, of which we need  }
            { the resulttype later on and temprefs can only be         }
            { resulttypepassed if the resulttype of the temp is known) }
            resulttypepass(tnode(filetemp));

            { assign the address of the file to the temp }
            addstatement(newstatement,
              cassignmentnode.create(ctemprefnode.create(filetemp),
                caddrnode.create(cloadnode.create(srsym,tempowner))));

            { create a new fileparameter as follows: file_type(temp^)    }
            { (so that we pass the value and not the address of the temp }
            { to the read/write routine)                                 }
            filepara := ccallparanode.create(ctypeconvnode.create_explicit(
              cderefnode.create(ctemprefnode.create(filetemp)),srsym.vartype),nil);
          end
        else
          { remove filepara from the parameter chain }
          begin
            left := filepara.right;
            filepara.right := nil;
            { the file para is a var parameter, but it must be valid already }
            set_varstate(filepara.left,vs_used,true);
            { check if we should make a temp to store the result of a complex }
            { expression (better heuristics, anyone?) (JM)                    }
            if (filepara.left.nodetype <> loadn) then
              begin
                { create a temp which will hold a pointer to the file }
                filetemp := ctempcreatenode.create_reg(voidpointertype,voidpointertype.def.size,tt_persistent);

                { add it to the statements }
                addstatement(newstatement,filetemp);

                { make sure the resulttype of the temp (and as such of the }
                { temprefs coming after it) is set (necessary because the  }
                { temprefs will be part of the filepara, of which we need  }
                { the resulttype later on and temprefs can only be         }
                { resulttypepassed if the resulttype of the temp is known) }
                resulttypepass(tnode(filetemp));

                { assign the address of the file to the temp }
                addstatement(newstatement,
                  cassignmentnode.create(ctemprefnode.create(filetemp),
                    caddrnode.create(filepara.left)));
                resulttypepass(newstatement.left);
                { create a new fileparameter as follows: file_type(temp^)    }
                { (so that we pass the value and not the address of the temp }
                { to the read/write routine)                                 }
                nextpara := ccallparanode.create(ctypeconvnode.create_explicit(
                  cderefnode.create(ctemprefnode.create(filetemp)),filepara.left.resulttype),nil);

                { replace the old file para with the new one }
                filepara.left := nil;
                filepara.free;
                filepara := nextpara;
              end;
          end;

        { the resulttype of the filepara must be set since it's }
        { used below                                            }
        filepara.get_paratype;

        { now, filepara is nowhere referenced anymore, so we can safely dispose it }
        { if something goes wrong or at the end of the procedure                   }

        { choose the correct procedure prefix }
        procprefix := 'fpc_'+procnames[is_typed,do_read];

        { we're going to reuse the paranodes, so make sure they don't get freed }
        { twice                                                                 }
        para := tcallparanode(left);
        left := nil;

        { no errors found yet... }
        found_error := false;

        if is_typed then
          begin
            { add the typesize to the filepara }
            filepara.right := ccallparanode.create(cordconstnode.create(
              tfiledef(filepara.resulttype.def).typedfiletype.def.size,s32inttype,true),nil);

            { check for "no parameters" (you need at least one extra para for typed files) }
            if not assigned(para) then
              begin
                CGMessage(parser_e_wrong_parameter_size);
                found_error := true;
              end;

            { process all parameters }
            while assigned(para) do
              begin
                { check if valid parameter }
                if para.left.nodetype=typen then
                  begin
                    CGMessagePos(para.left.fileinfo,type_e_cant_read_write_type);
                    found_error := true;
                  end;

                { support writeln(procvar) }
                if (para.left.resulttype.def.deftype=procvardef) then
                  begin
                    p1:=ccallnode.create_procvar(nil,para.left);
                    resulttypepass(p1);
                    para.left:=p1;
                  end;

                inserttypeconv(para.left,tfiledef(filepara.resulttype.def).typedfiletype);

                if assigned(para.right) and
                   (cpf_is_colon_para in tcallparanode(para.right).callparaflags) then
                  begin
                    CGMessagePos(para.right.fileinfo,parser_e_illegal_colon_qualifier);

                    { skip all colon para's }
                    nextpara := tcallparanode(tcallparanode(para.right).right);
                    while assigned(nextpara) and
                          (cpf_is_colon_para in nextpara.callparaflags) do
                      nextpara := tcallparanode(nextpara.right);

                    found_error := true;
                  end
                else
                  { get next parameter }
                  nextpara := tcallparanode(para.right);

                { When we have a call, we have a problem: you can't pass the  }
                { result of a call as a formal const parameter. Solution:     }
                { assign the result to a temp and pass this temp as parameter }
                { This is not very efficient, but write(typedfile,x) is       }
                { already slow by itself anyway (no buffering) (JM)           }
                { Actually, thge same goes for every non-simple expression    }
                { (such as an addition, ...) -> put everything but load nodes }
                { into temps (JM)                                             }
                { of course, this must only be allowed for writes!!! (JM)     }
                if not(do_read) and
                   (para.left.nodetype <> loadn) then
                  begin
                    { create temp for result }
                    temp := ctempcreatenode.create(para.left.resulttype,
                      para.left.resulttype.def.size,tt_persistent);
                    addstatement(newstatement,temp);
                    { assign result to temp }
                    addstatement(newstatement,
                      cassignmentnode.create(ctemprefnode.create(temp),
                        para.left));
                    { replace (reused) paranode with temp }
                    para.left := ctemprefnode.create(temp);
                  end;
                { add fileparameter }
                para.right := filepara.getcopy;

                { create call statment                                             }
                { since the parameters are in the correct order, we have to insert }
                { the statements always at the end of the current block            }
                addstatement(newstatement,ccallnode.createintern(procprefix,para));

                { if we used a temp, free it }
                if para.left.nodetype = temprefn then
                  addstatement(newstatement,ctempdeletenode.create(temp));

                { process next parameter }
                para := nextpara;
              end;

            { free the file parameter }
            filepara.free;
          end
        else
          { text read/write }
          begin
            while assigned(para) do
              begin
                { is this parameter faulty? }
                error_para := false;
                { is this parameter an ordinal? }
                is_ordinal := false;
                { is this parameter a real? }
                is_real:=false;

                { can't read/write types }
                if para.left.nodetype=typen then
                  begin
                    CGMessagePos(para.fileinfo,type_e_cant_read_write_type);
                    error_para := true;
                  end;

                { support writeln(procvar) }
                if (para.left.resulttype.def.deftype=procvardef) then
                  begin
                    p1:=ccallnode.create_procvar(nil,para.left);
                    resulttypepass(p1);
                    para.left:=p1;
                  end;

                { Currency will be written using the bestreal }
                if is_currency(para.left.resulttype.def) then
                  inserttypeconv(para.left,pbestrealtype^);

                case para.left.resulttype.def.deftype of
                  stringdef :
                    begin
                      name := procprefix+tstringdef(para.left.resulttype.def).stringtypname;
                    end;
                  pointerdef :
                    begin
                      if not is_pchar(para.left.resulttype.def) then
                        begin
                          CGMessagePos(para.fileinfo,type_e_cant_read_write_type);
                          error_para := true;
                        end
                      else
                        name := procprefix+'pchar_as_pointer';
                    end;
                  floatdef :
                    begin
                      is_real:=true;
                      name := procprefix+'float';
                    end;
                  orddef :
                    begin
                      is_ordinal := true;
                      case torddef(para.left.resulttype.def).typ of
{$ifdef cpu64bit}
                        s64bit,
{$endif cpu64bit}
                        s8bit,
                        s16bit,
                        s32bit :
                          name := procprefix+'sint';
{$ifdef cpu64bit}
                        u64bit,
{$endif cpu64bit}
                        u8bit,
                        u16bit,
                        u32bit :
                          name := procprefix+'uint';
                        uchar :
                          name := procprefix+'char';
                        uwidechar :
                          name := procprefix+'widechar';
{$ifndef cpu64bit}
                        s64bit :
                          name := procprefix+'int64';
                        u64bit :
                          name := procprefix+'qword';
{$endif cpu64bit}
                        bool8bit,
                        bool16bit,
                        bool32bit :
                          begin
                            if do_read then
                              begin
                                CGMessagePos(para.fileinfo,type_e_cant_read_write_type);
                                error_para := true;
                              end
                            else
                              name := procprefix+'boolean'
                            end
                        else
                          begin
                            CGMessagePos(para.fileinfo,type_e_cant_read_write_type);
                            error_para := true;
                          end;
                      end;
                    end;
                  variantdef :
                    name:=procprefix+'variant';
                  arraydef :
                    begin
                      if is_chararray(para.left.resulttype.def) then
                        name := procprefix+'pchar_as_array'
                      else
                        begin
                          CGMessagePos(para.fileinfo,type_e_cant_read_write_type);
                          error_para := true;
                        end
                    end
                  else
                    begin
                      CGMessagePos(para.fileinfo,type_e_cant_read_write_type);
                      error_para := true;
                    end
                end;

                { check for length/fractional colon para's }
                fracpara := nil;
                lenpara := nil;
                if assigned(para.right) and
                   (cpf_is_colon_para in tcallparanode(para.right).callparaflags) then
                  begin
                    lenpara := tcallparanode(para.right);
                    if assigned(lenpara.right) and
                       (cpf_is_colon_para in tcallparanode(lenpara.right).callparaflags) then
                      fracpara:=tcallparanode(lenpara.right);
                  end;
                { get the next parameter now already, because we're going }
                { to muck around with the pointers                        }
                if assigned(fracpara) then
                  nextpara := tcallparanode(fracpara.right)
                else if assigned(lenpara) then
                  nextpara := tcallparanode(lenpara.right)
                else
                  nextpara := tcallparanode(para.right);

                { check if a fracpara is allowed }
                if assigned(fracpara) and not is_real then
                  begin
                    CGMessagePos(fracpara.fileinfo,parser_e_illegal_colon_qualifier);
                    error_para := true;
                  end
                else if assigned(lenpara) and do_read then
                  begin
                    { I think this is already filtered out by parsing, but I'm not sure (JM) }
                    CGMessagePos(lenpara.fileinfo,parser_e_illegal_colon_qualifier);
                    error_para := true;
                  end;

                { adjust found_error }
                found_error := found_error or error_para;

                if not error_para then
                  begin
                    { create dummy frac/len para's if necessary }
                    if not do_read then
                      begin
                        { difference in default value for floats and the rest :( }
                        if not is_real then
                          begin
                            if not assigned(lenpara) then
                              lenpara := ccallparanode.create(
                                cordconstnode.create(0,sinttype,false),nil)
                            else
                              { make sure we don't pass the successive }
                              { parameters too. We also already have a }
                              { reference to the next parameter in     }
                              { nextpara                               }
                              lenpara.right := nil;
                          end
                        else
                          begin
                            if not assigned(lenpara) then
                              lenpara := ccallparanode.create(
                                cordconstnode.create(-32767,sinttype,false),nil);
                            { also create a default fracpara if necessary }
                            if not assigned(fracpara) then
                              fracpara := ccallparanode.create(
                                cordconstnode.create(-1,sinttype,false),nil);
                            { add it to the lenpara }
                            lenpara.right := fracpara;
                            { and add the realtype para (this also removes the link }
                            { to any parameters coming after it)                    }
                            fracpara.right := ccallparanode.create(
                                cordconstnode.create(ord(tfloatdef(para.left.resulttype.def).typ),
                                sinttype,true),nil);
                          end;
                      end;

                    if do_read and
                      ((is_ordinal and
                        not(torddef(para.left.resulttype.def).typ in hasownreadfunc) and
                        (para.left.resulttype.def.size<>sinttype.def.size)
                       ) or
                       (is_real and
                        not equal_defs(para.left.resulttype.def,pbestrealtype^.def)
                       )
                      ) then
                      { special handling of reading small numbers, because the helpers  }
                      { expect a longint/card/bestreal var parameter. Use a temp. can't }
                      { use functions because then the call to FPC_IOCHECK destroys     }
                      { their result before we can store it                             }
                      begin
                        { get the resulttype of the var parameter of the helper }
                        if is_real then
                          restype := pbestrealtype
                        else if is_signed(para.left.resulttype.def) then
                          restype := @sinttype
                        else
                          restype := @uinttype;

                        { create the parameter list: the temp ... }
                        temp := ctempcreatenode.create(restype^,restype^.def.size,tt_persistent);
                        addstatement(newstatement,temp);

                        { ... and the file }
                        p1 := ccallparanode.create(ctemprefnode.create(temp),
                          filepara.getcopy);

                        { create the call to the helper }
                        addstatement(newstatement,
                          ccallnode.createintern(name,tcallparanode(p1)));

                        { assign the result to the original var (this automatically }
                        { takes care of range checking)                             }
                        addstatement(newstatement,
                          cassignmentnode.create(para.left,
                            ctemprefnode.create(temp)));

                        { release the temp location }
                        addstatement(newstatement,ctempdeletenode.create(temp));

                        { statement of para is used }
                        para.left := nil;

                        { free the enclosing tcallparanode, but not the }
                        { parameters coming after it                    }
                        para.right := nil;
                        para.free;
                      end
                    else
                      { read of non s/u-8/16bit, or a write }
                      begin
                        { add the filepara to the current parameter }
                        para.right := filepara.getcopy;
                        { add the lenpara (fracpara and realtype are already linked }
                        { with it if necessary)                                     }
                        tcallparanode(para.right).right := lenpara;
                        { create the call statement }
                        addstatement(newstatement,
                          ccallnode.createintern(name,para));
                      end
                  end
                else
                  { error_para = true }
                  begin
                    { free the parameter, since it isn't referenced anywhere anymore }
                    para.right := nil;
                    para.free;
                    if assigned(lenpara) then
                      begin
                        lenpara.right := nil;
                        lenpara.free;
                      end;
                    if assigned(fracpara) then
                      begin
                        fracpara.right := nil;
                        fracpara.free;
                      end;
                  end;

                { process next parameter }
                para := nextpara;
              end;

            { if no error, add the write(ln)/read(ln) end calls }
            if not found_error then
              begin
                case inlinenumber of
                  in_read_x:
                    name:='fpc_read_end';
                  in_write_x:
                    name:='fpc_write_end';
                  in_readln_x:
                    name:='fpc_readln_end';
                  in_writeln_x:
                    name:='fpc_writeln_end';
                end;
                addstatement(newstatement,ccallnode.createintern(name,filepara));
              end;
          end;

          { if we found an error, simply delete the generated blocknode }
          if found_error then
            newblock.free
          else
            begin
              { deallocate the temp for the file para if we used one }
              if assigned(filetemp) then
                addstatement(newstatement,ctempdeletenode.create(filetemp));
              { otherwise return the newly generated block of instructions, }
              { but first free the errornode we generated at the beginning }
              result.free;
              result := newblock
            end;
      end;


    function tinlinenode.handle_val: tnode;
      var
        procname,
        suffix        : string[31];
        sourcepara,
        destpara,
        codepara,
        sizepara,
        newparas      : tcallparanode;
        orgcode       : tnode;
        newstatement  : tstatementnode;
        newblock      : tblocknode;
        tempcode      : ttempcreatenode;
      begin
        { for easy exiting if something goes wrong }
        result := cerrornode.create;

        { check the amount of parameters }
        if not(assigned(left)) or
           not(assigned(tcallparanode(left).right)) then
         begin
           CGMessage(parser_e_wrong_parameter_size);
           exit;
         end;

        { reverse parameters for easier processing }
        left := reverseparameters(tcallparanode(left));

        { get the parameters }
        tempcode := nil;
        orgcode := nil;
        sizepara := nil;
        sourcepara := tcallparanode(left);
        destpara := tcallparanode(sourcepara.right);
        codepara := tcallparanode(destpara.right);

        { check if codepara is valid }
        if assigned(codepara) and
           (
            (codepara.resulttype.def.deftype <> orddef)
{$ifndef cpu64bit}
            or is_64bitint(codepara.resulttype.def)
{$endif cpu64bit}
            ) then
          begin
            CGMessagePos1(codepara.fileinfo,type_e_integer_expr_expected,codepara.resulttype.def.typename);
            exit;
          end;

        { check if dest para is valid }
        if not(destpara.resulttype.def.deftype in [orddef,floatdef]) then
          begin
            CGMessagePos(destpara.fileinfo,type_e_integer_or_real_expr_expected);
            exit;
          end;

        { we're going to reuse the exisiting para's, so make sure they }
        { won't be disposed                                            }
        left := nil;

        { create the blocknode which will hold the generated statements + }
        { an initial dummy statement                                      }

        newblock:=internalstatements(newstatement);

        { do we need a temp for code? Yes, if no code specified, or if  }
        { code is not a 32bit parameter (we already checked whether the }
        { the code para, if specified, was an orddef)                   }
        if not assigned(codepara) or
           (codepara.resulttype.def.size<>sinttype.def.size) then
          begin
            tempcode := ctempcreatenode.create(sinttype,sinttype.def.size,tt_persistent);
            addstatement(newstatement,tempcode);
            { set the resulttype of the temp (needed to be able to get }
            { the resulttype of the tempref used in the new code para) }
            resulttypepass(tnode(tempcode));
            { create a temp codepara, but save the original code para to }
            { assign the result to later on                              }
            if assigned(codepara) then
              begin
                orgcode := codepara.left;
                codepara.left := ctemprefnode.create(tempcode);
              end
            else
              codepara := ccallparanode.create(ctemprefnode.create(tempcode),nil);
            { we need its resulttype later on }
            codepara.get_paratype;
          end
        else if (torddef(codepara.resulttype.def).typ = torddef(sinttype.def).typ) then
          { because code is a var parameter, it must match types exactly    }
          { however, since it will return values in [0..255], both longints }
          { and cardinals are fine. Since the formal code para type is      }
          { longint, insert a typecoversion to longint for cardinal para's  }
          begin
            codepara.left := ctypeconvnode.create_explicit(codepara.left,sinttype);
            { make it explicit, oterwise you may get a nonsense range }
            { check error if the cardinal already contained a value   }
            { > $7fffffff                                             }
            codepara.get_paratype;
          end;

        { create the procedure name }
        procname := 'fpc_val_';

        case destpara.resulttype.def.deftype of
          orddef:
            begin
              case torddef(destpara.resulttype.def).typ of
{$ifdef cpu64bit}
                scurrency,
                s64bit,
{$endif cpu64bit}
                s8bit,
                s16bit,
                s32bit:
                  begin
                    suffix := 'sint_';
                    { we also need a destsize para in this case }
                    sizepara := ccallparanode.create(cordconstnode.create
                      (destpara.resulttype.def.size,s32inttype,true),nil);
                  end;
{$ifdef cpu64bit}
                u64bit,
{$endif cpu64bit}
                u8bit,
                u16bit,
                u32bit:
                   suffix := 'uint_';
{$ifndef cpu64bit}
                scurrency,
                s64bit: suffix := 'int64_';
                u64bit: suffix := 'qword_';
{$endif cpu64bit}
                else
                  internalerror(200304225);
              end;
            end;
          floatdef:
            begin
              suffix := 'real_';
            end;
        end;

        procname := procname + suffix;

        { play a trick to have tcallnode handle invalid source parameters: }
        { the shortstring-longint val routine by default                   }
        if (sourcepara.resulttype.def.deftype = stringdef) then
          procname := procname + tstringdef(sourcepara.resulttype.def).stringtypname
        else
          procname := procname + 'shortstr';

        { set up the correct parameters for the call: the code para... }
        newparas := codepara;
        { and the source para }
        codepara.right := sourcepara;
        { sizepara either contains nil if none is needed (which is ok, since   }
        { then the next statement severes any possible links with other paras  }
        { that sourcepara may have) or it contains the necessary size para and }
        { its right field is nil                                               }
        sourcepara.right := sizepara;

        { create the call and assign the result to dest  }
        { (val helpers are functions)                    }
        { the assignment will take care of rangechecking }
        addstatement(newstatement,cassignmentnode.create(
          destpara.left,ccallnode.createintern(procname,newparas)));

        { dispose of the enclosing paranode of the destination }
        destpara.left := nil;
        destpara.right := nil;
        destpara.free;

        { check if we used a temp for code and whether we have to store }
        { it to the real code parameter                                 }
        if assigned(orgcode) then
          addstatement(newstatement,cassignmentnode.create(
              orgcode,
              ctemprefnode.create(tempcode)));

        { release the temp if we allocated one }
        if assigned(tempcode) then
          addstatement(newstatement,ctempdeletenode.create(tempcode));

        { free the errornode }
        result.free;
        { and return it }
        result := newblock;
      end;


{$ifdef fpc}
{$maxfpuregisters 0}
{$endif fpc}

    function tinlinenode.det_resulttype:tnode;

        function do_lowhigh(const t:ttype) : tnode;
        var
           v    : tconstexprint;
           enum : tenumsym;
           hp   : tnode;
        begin
           case t.def.deftype of
             orddef:
               begin
                  if inlinenumber=in_low_x then
                    v:=torddef(t.def).low
                  else
                    v:=torddef(t.def).high;
                  { low/high of torddef are longints, so we need special }
                  { handling for cardinal and 64bit types (JM)           }
                  { 1.0.x doesn't support int64($ffffffff) correct, it'll expand
                    to -1 instead of staying $ffffffff. Therefor we use $ffff with
                    shl twice (PFV) }
                  case torddef(t.def).typ of
                    s64bit,scurrency :
                      begin
                        if (inlinenumber=in_low_x) then
                          v := int64($80000000) shl 32
                        else
                          v := (int64($7fffffff) shl 32) or int64($ffff) shl 16 or int64($ffff)
                      end;
                    u64bit :
                      begin
                        { we have to use a dirty trick for high(qword),     }
                        { because it's bigger than high(tconstexprint) (JM) }
                        v := 0
                      end
                    else
                      begin
                        if not is_signed(t.def) then
                          v := cardinal(v);
                      end;
                  end;
                  hp:=cordconstnode.create(v,t,true);
                  resulttypepass(hp);
                  { fix high(qword) }
                  if (torddef(t.def).typ=u64bit) and
                     (inlinenumber = in_high_x) then
                    tordconstnode(hp).value := -1; { is the same as qword($ffffffffffffffff) }
                  do_lowhigh:=hp;
               end;
             enumdef:
               begin
                  enum:=tenumsym(tenumdef(t.def).firstenum);
                  v:=tenumdef(t.def).maxval;
                  if inlinenumber=in_high_x then
                    while assigned(enum) and (enum.value <> v) do
                      enum:=enum.nextenum;
                  if not assigned(enum) then
                    internalerror(309993)
                  else
                    hp:=genenumnode(enum);
                  do_lowhigh:=hp;
               end;
           else
             internalerror(87);
           end;
        end;

        function getconstrealvalue : bestreal;
        begin
           case left.nodetype of
              ordconstn:
                getconstrealvalue:=tordconstnode(left).value;
              realconstn:
                getconstrealvalue:=trealconstnode(left).value_real;
              else
                internalerror(309992);
           end;
        end;

        procedure setconstrealvalue(r : bestreal);
        begin
           result:=crealconstnode.create(r,pbestrealtype^);
        end;


        function handle_ln_const(r : bestreal) : tnode;
          begin
            if r<=0.0 then
              if (cs_check_range in aktlocalswitches) or
                 (cs_check_overflow in aktlocalswitches) then
                 begin
                   result:=crealconstnode.create(0,pbestrealtype^);
                   CGMessage(type_e_wrong_math_argument)
                 end
              else
                begin
                  if r=0.0 then
                    result:=crealconstnode.create(double(MathQNaN),pbestrealtype^)
                  else
                    result:=crealconstnode.create(double(MathNegInf),pbestrealtype^)
                end
            else
              result:=crealconstnode.create(ln(r),pbestrealtype^)
          end;


        function handle_sqrt_const(r : bestreal) : tnode;
          begin
            if r<0.0 then
              if (cs_check_range in aktlocalswitches) or
                 (cs_check_overflow in aktlocalswitches) then
                 begin
                   result:=crealconstnode.create(0,pbestrealtype^);
                   CGMessage(type_e_wrong_math_argument)
                 end
              else
                result:=crealconstnode.create(double(MathQNaN),pbestrealtype^)
            else
              result:=crealconstnode.create(sqrt(r),pbestrealtype^)
          end;


      var
         vl,vl2    : TConstExprInt;
         vr        : bestreal;
         hightree,
         hp        : tnode;
         srsym     : tsym;
         isreal    : boolean;
         checkrange : boolean;
      label
         myexit;
      begin
         result:=nil;
         { if we handle writeln; left contains no valid address }
         if assigned(left) then
           begin
             if left.nodetype=callparan then
               tcallparanode(left).get_paratype
             else
               resulttypepass(left);
           end;
         inc(parsing_para_level);

         { handle intern constant functions in separate case }
         if nf_inlineconst in flags then
          begin
            { no parameters? }
            if not assigned(left) then
             begin
               case inlinenumber of
                 in_const_pi :
                   hp:=crealconstnode.create(pi,pbestrealtype^);
                 else
                   internalerror(89);
               end;
             end
            else
             begin
               vl:=0;
               vl2:=0; { second parameter Ex: ptr(vl,vl2) }
               vr:=0;
               isreal:=false;
               case left.nodetype of
                 realconstn :
                   begin
                     isreal:=true;
                     vr:=trealconstnode(left).value_real;
                   end;
                 ordconstn :
                   vl:=tordconstnode(left).value;
                 callparan :
                   begin
                     { both exists, else it was not generated }
                     vl:=tordconstnode(tcallparanode(left).left).value;
                     vl2:=tordconstnode(tcallparanode(tcallparanode(left).right).left).value;
                   end;
                 else
                   CGMessage(parser_e_illegal_expression);
               end;
               case inlinenumber of
                 in_const_trunc :
                   begin
                     if isreal then
                       begin
                          if (vr>=9223372036854775808.0) or (vr<=-9223372036854775809.0) then
                            begin
                               CGMessage(parser_e_range_check_error);
                               hp:=cordconstnode.create(1,s64inttype,false)
                            end
                          else
                            hp:=cordconstnode.create(trunc(vr),s64inttype,true)
                       end
                     else
                      hp:=cordconstnode.create(trunc(vl),s64inttype,true);
                   end;
                 in_const_round :
                   begin
                     if isreal then
                       begin
                          if (vr>=9223372036854775807.5) or (vr<=-9223372036854775808.5) then
                            begin
                               CGMessage(parser_e_range_check_error);
                               hp:=cordconstnode.create(1,s64inttype,false)
                            end
                          else
                            hp:=cordconstnode.create(round(vr),s64inttype,true)
                       end
                     else
                      hp:=cordconstnode.create(round(vl),s64inttype,true);
                   end;
                 in_const_frac :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(frac(vr),pbestrealtype^)
                     else
                      hp:=crealconstnode.create(frac(vl),pbestrealtype^);
                   end;
                 in_const_int :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(int(vr),pbestrealtype^)
                     else
                      hp:=crealconstnode.create(int(vl),pbestrealtype^);
                   end;
                 in_const_abs :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(abs(vr),pbestrealtype^)
                     else
                      hp:=cordconstnode.create(abs(vl),left.resulttype,true);
                   end;
                 in_const_sqr :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(sqr(vr),pbestrealtype^)
                     else
                      hp:=cordconstnode.create(sqr(vl),left.resulttype,true);
                   end;
                 in_const_odd :
                   begin
                     if isreal then
                      CGMessage1(type_e_integer_expr_expected,left.resulttype.def.typename)
                     else
                      hp:=cordconstnode.create(byte(odd(vl)),booltype,true);
                   end;
                 in_const_swap_word :
                   begin
                     if isreal then
                      CGMessage1(type_e_integer_expr_expected,left.resulttype.def.typename)
                     else
                      hp:=cordconstnode.create((vl and $ff) shl 8+(vl shr 8),left.resulttype,true);
                   end;
                 in_const_swap_long :
                   begin
                     if isreal then
                      CGMessage1(type_e_integer_expr_expected,left.resulttype.def.typename)
                     else
                      hp:=cordconstnode.create((vl and $ffff) shl 16+(vl shr 16),left.resulttype,true);
                   end;
                 in_const_swap_qword :
                   begin
                     if isreal then
                      CGMessage1(type_e_integer_expr_expected,left.resulttype.def.typename)
                     else
                      hp:=cordconstnode.create((vl and $ffff) shl 32+(vl shr 32),left.resulttype,true);
                   end;
                 in_const_ptr :
                   begin
                     if isreal then
                      CGMessage1(type_e_integer_expr_expected,left.resulttype.def.typename)
                     else
                      hp:=cpointerconstnode.create((vl2 shl 4)+vl,voidfarpointertype);
                   end;
                 in_const_sqrt :
                   begin
                     if isreal then
                       hp:=handle_sqrt_const(vr)
                     else
                       hp:=handle_sqrt_const(vl)
                   end;
                 in_const_arctan :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(arctan(vr),pbestrealtype^)
                     else
                      hp:=crealconstnode.create(arctan(vl),pbestrealtype^);
                   end;
                 in_const_cos :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(cos(vr),pbestrealtype^)
                     else
                      hp:=crealconstnode.create(cos(vl),pbestrealtype^);
                   end;
                 in_const_sin :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(sin(vr),pbestrealtype^)
                     else
                      hp:=crealconstnode.create(sin(vl),pbestrealtype^);
                   end;
                 in_const_exp :
                   begin
                     if isreal then
                      hp:=crealconstnode.create(exp(vr),pbestrealtype^)
                     else
                      hp:=crealconstnode.create(exp(vl),pbestrealtype^);
                   end;
                 in_const_ln :
                   begin
                     if isreal then
                       hp:=handle_ln_const(vr)
                     else
                       hp:=handle_ln_const(vl)
                   end;
                 else
                   internalerror(88);
               end;
             end;
            if hp=nil then
             hp:=tnode.create(errorn);
            result:=hp;
            goto myexit;
          end
         else
          begin
            case inlinenumber of
              in_lo_long,
              in_hi_long,
              in_lo_qword,
              in_hi_qword,
              in_lo_word,
              in_hi_word :
                begin
                  { give warning for incompatibility with tp and delphi }
                  if (inlinenumber in [in_lo_long,in_hi_long,in_lo_qword,in_hi_qword]) and
                     ((m_tp7 in aktmodeswitches) or
                      (m_delphi in aktmodeswitches)) then
                    CGMessage(type_w_maybe_wrong_hi_lo);
                  { constant folding }
                  if left.nodetype=ordconstn then
                   begin
                     case inlinenumber of
                       in_lo_word :
                         hp:=cordconstnode.create(tordconstnode(left).value and $ff,left.resulttype,true);
                       in_hi_word :
                         hp:=cordconstnode.create(tordconstnode(left).value shr 8,left.resulttype,true);
                       in_lo_long :
                         hp:=cordconstnode.create(tordconstnode(left).value and $ffff,left.resulttype,true);
                       in_hi_long :
                         hp:=cordconstnode.create(tordconstnode(left).value shr 16,left.resulttype,true);
                       in_lo_qword :
                         hp:=cordconstnode.create(tordconstnode(left).value and $ffffffff,left.resulttype,true);
                       in_hi_qword :
                         hp:=cordconstnode.create(tordconstnode(left).value shr 32,left.resulttype,true);
                     end;
                     result:=hp;
                     goto myexit;
                   end;
                  set_varstate(left,vs_used,true);
                  if not is_integer(left.resulttype.def) then
                    CGMessage1(type_e_integer_expr_expected,left.resulttype.def.typename);
                  case inlinenumber of
                    in_lo_word,
                    in_hi_word :
                      resulttype:=u8inttype;
                    in_lo_long,
                    in_hi_long :
                      resulttype:=u16inttype;
                    in_lo_qword,
                    in_hi_qword :
                      resulttype:=u32inttype;
                  end;
                end;


              in_sizeof_x:
                begin
                  set_varstate(left,vs_used,false);
                  if paramanager.push_high_param(vs_value,left.resulttype.def,current_procinfo.procdef.proccalloption) then
                   begin
                     hightree:=load_high_value_node(tvarsym(tloadnode(left).symtableentry));
                     if assigned(hightree) then
                      begin
                        hp:=caddnode.create(addn,hightree,
                                         cordconstnode.create(1,sinttype,false));
                        if (left.resulttype.def.deftype=arraydef) and
                           (tarraydef(left.resulttype.def).elesize<>1) then
                          hp:=caddnode.create(muln,hp,cordconstnode.create(tarraydef(
                            left.resulttype.def).elesize,sinttype,true));
                        result:=hp;
                      end;
                   end
                  else
                   resulttype:=sinttype;
                end;

              in_typeof_x:
                begin
                  set_varstate(left,vs_used,false);
                  resulttype:=voidpointertype;
                end;

              in_ord_x:
                begin
                   if (left.nodetype=ordconstn) then
                    begin
                      hp:=cordconstnode.create(
                         tordconstnode(left).value,sinttype,true);
                      result:=hp;
                      goto myexit;
                    end;
                   set_varstate(left,vs_used,true);
                   case left.resulttype.def.deftype of
                     orddef :
                       begin
                         case torddef(left.resulttype.def).typ of
                           bool8bit,
                           uchar:
                             begin
                               { change to byte() }
                               hp:=ctypeconvnode.create_explicit(left,u8inttype);
                               left:=nil;
                               result:=hp;
                             end;
                           bool16bit,
                           uwidechar :
                             begin
                               { change to word() }
                               hp:=ctypeconvnode.create_explicit(left,u16inttype);
                               left:=nil;
                               result:=hp;
                             end;
                           bool32bit :
                             begin
                               { change to dword() }
                               hp:=ctypeconvnode.create_explicit(left,u32inttype);
                               left:=nil;
                               result:=hp;
                             end;
                           uvoid :
                             CGMessage1(type_e_ordinal_expr_expected,left.resulttype.def.typename);
                           else
                             begin
                               { all other orddef need no transformation }
                               hp:=left;
                               left:=nil;
                               result:=hp;
                             end;
                         end;
                       end;
                     enumdef :
                       begin
                         hp:=ctypeconvnode.create_explicit(left,s32inttype);
                         left:=nil;
                         result:=hp;
                       end;
                     pointerdef :
                       begin
                         if m_mac in aktmodeswitches then
                           begin
                             hp:=ctypeconvnode.create_explicit(left,ptrinttype);
                             left:=nil;
                             result:=hp;
                           end
                         else
                           CGMessage1(type_e_ordinal_expr_expected,left.resulttype.def.typename);
                       end
                     else
                       CGMessage1(type_e_ordinal_expr_expected,left.resulttype.def.typename);
                   end;
                end;

              in_chr_byte:
                begin
                   { convert to explicit char() }
                   set_varstate(left,vs_used,true);
                   hp:=ctypeconvnode.create_explicit(left,cchartype);
                   left:=nil;
                   result:=hp;
                end;

              in_length_x:
                begin
                  set_varstate(left,vs_used,true);

                  case left.resulttype.def.deftype of
                    stringdef :
                      begin
                        { we don't need string convertions here }
                        if (left.nodetype=typeconvn) and
                           (ttypeconvnode(left).left.resulttype.def.deftype=stringdef) then
                         begin
                           hp:=ttypeconvnode(left).left;
                           ttypeconvnode(left).left:=nil;
                           left.free;
                           left:=hp;
                         end;

                        { evaluates length of constant strings direct }
                        if (left.nodetype=stringconstn) then
                         begin
                           hp:=cordconstnode.create(
                             tstringconstnode(left).len,s32inttype,true);
                           result:=hp;
                           goto myexit;
                         end;
                      end;
                    orddef :
                      begin
                        { length of char is one allways }
                        if is_char(left.resulttype.def) or
                           is_widechar(left.resulttype.def) then
                         begin
                           hp:=cordconstnode.create(1,s32inttype,false);
                           result:=hp;
                           goto myexit;
                         end
                        else
                         CGMessage(type_e_mismatch);
                      end;
                    pointerdef :
                      begin
                        if is_pchar(left.resulttype.def) then
                         begin
                            hp := ccallparanode.create(left,nil);
                            result := ccallnode.createintern('fpc_pchar_length',hp);
                            { make sure the left node doesn't get disposed, since it's }
                            { reused in the new node (JM)                              }
                            left:=nil;
                            goto myexit;
                         end
                        else if is_pwidechar(left.resulttype.def) then
                         begin
                            hp := ccallparanode.create(left,nil);
                            result := ccallnode.createintern('fpc_pwidechar_length',hp);
                            { make sure the left node doesn't get disposed, since it's }
                            { reused in the new node (JM)                              }
                            left:=nil;
                            goto myexit;
                         end
                        else
                         CGMessage(type_e_mismatch);
                      end;
                    arraydef :
                      begin
                        if is_open_array(left.resulttype.def) or
                           is_array_of_const(left.resulttype.def) then
                         begin
                           hightree:=load_high_value_node(tvarsym(tloadnode(left).symtableentry));
                           if assigned(hightree) then
                            begin
                              hp:=caddnode.create(addn,hightree,
                                                  cordconstnode.create(1,s32inttype,false));
                              result:=hp;
                            end;
                           goto myexit;
                         end
                        else
                         if not is_dynamic_array(left.resulttype.def) then
                          begin
                            hp:=cordconstnode.create(tarraydef(left.resulttype.def).highrange-
                                                      tarraydef(left.resulttype.def).lowrange+1,
                                                     s32inttype,true);
                            result:=hp;
                            goto myexit;
                          end
                        else
                          begin
                            hp := ccallparanode.create(ctypeconvnode.create_explicit(left,voidpointertype),nil);
                            result := ccallnode.createintern('fpc_dynarray_length',hp);
                            { make sure the left node doesn't get disposed, since it's }
                            { reused in the new node (JM)                              }
                            left:=nil;
                            goto myexit;
                          end;
                      end;
                    else
                      CGMessage(type_e_mismatch);
                  end;

                  { shortstring return an 8 bit value as the length
                    is the first byte of the string }
                  if is_shortstring(left.resulttype.def) then
                   resulttype:=u8inttype
                  else
                   resulttype:=sinttype;
                end;

              in_typeinfo_x:
                begin
                   set_varstate(left,vs_used,true);
                   resulttype:=voidpointertype;
                end;

              in_assigned_x:
                begin
                  { the parser has already made sure the expression is valid }

                  { handle constant expressions }
                  if is_constnode(tcallparanode(left).left) or
                     (tcallparanode(left).left.nodetype = pointerconstn) then
                    begin
                      { let an add node figure it out }
                      result := caddnode.create(unequaln,tcallparanode(left).left,cnilnode.create);
                      tcallparanode(left).left := nil;
                      { free left, because otherwise some code at 'myexit' tries  }
                      { to run get_paratype for it, which crashes since left.left }
                      { is now nil                                                }
                      left.free;
                      left := nil;
                      goto myexit;
                    end;
                  { otherwise handle separately, because there could be a procvar, which }
                  { is 2*sizeof(pointer), while we must only check the first pointer     }
                  set_varstate(tcallparanode(left).left,vs_used,true);
                  resulttype:=booltype;
                end;

              in_ofs_x :
                internalerror(2000101001);

              in_seg_x :
                begin
                  set_varstate(left,vs_used,false);
                  hp:=cordconstnode.create(0,s32inttype,false);
                  result:=hp;
                  goto myexit;
                end;

              in_pred_x,
              in_succ_x:
                begin
                   set_varstate(left,vs_used,true);
                   resulttype:=left.resulttype;
                   if not is_ordinal(resulttype.def) then
                     CGMessage(type_e_ordinal_expr_expected)
                   else
                     begin
                       if (resulttype.def.deftype=enumdef) and
                          (tenumdef(resulttype.def).has_jumps) then
                         CGMessage(type_e_succ_and_pred_enums_with_assign_not_possible);
                     end;

                   { only if the result is an enum do we do range checking }
                   if (resulttype.def.deftype=enumdef) then
                     checkrange := true
                   else
                     checkrange := false;

                   { do constant folding after check for jumps }
                   if left.nodetype=ordconstn then
                    begin
                      if inlinenumber=in_succ_x then
                       hp:=cordconstnode.create(tordconstnode(left).value+1,left.resulttype,checkrange)
                      else
                       hp:=cordconstnode.create(tordconstnode(left).value-1,left.resulttype,checkrange);
                      result:=hp;
                    end;
                end;

              in_initialize_x,
              in_finalize_x,
              in_setlength_x:
                begin
                  { inlined from pinline }
                  internalerror(200204231);
                end;

              in_inc_x,
              in_dec_x:
                begin
                  resulttype:=voidtype;
                  if assigned(left) then
                    begin
                       { first param must be var }
                       valid_for_var(tcallparanode(left).left);
                       set_varstate(tcallparanode(left).left,vs_used,true);

                       if (left.resulttype.def.deftype in [enumdef,pointerdef]) or
                          is_ordinal(left.resulttype.def) or
                          is_currency(left.resulttype.def) then
                        begin
                          { value of left gets changed -> must be unique }
                          set_unique(tcallparanode(left).left);
                          { two paras ? }
                          if assigned(tcallparanode(left).right) then
                           begin
                             set_varstate(tcallparanode(tcallparanode(left).right).left,vs_used,true);
                             inserttypeconv_explicit(tcallparanode(tcallparanode(left).right).left,tcallparanode(left).left.resulttype);
                             if assigned(tcallparanode(tcallparanode(left).right).right) then
                               CGMessage(parser_e_illegal_expression);
                           end;
                        end
                       else
                        CGMessage(type_e_ordinal_expr_expected);
                    end
                  else
                    CGMessage(type_e_mismatch);
                end;

              in_read_x,
              in_readln_x,
              in_write_x,
              in_writeln_x :
                begin
                  result := handle_read_write;
                end;

              in_settextbuf_file_x :
                begin
                  resulttype:=voidtype;
                  { now we know the type of buffer }
                  srsym:=searchsymonlyin(systemunit,'SETTEXTBUF');
                  hp:=ccallparanode.create(cordconstnode.create(
                     tcallparanode(left).left.resulttype.def.size,s32inttype,true),left);
                  hp:=ccallnode.create(hp,tprocsym(srsym),systemunit,nil,[]);
                  left:=nil;
                  result:=hp;
                end;

              { the firstpass of the arg has been done in firstcalln ? }
              in_reset_typedfile,
              in_rewrite_typedfile :
                begin
                  result := handle_reset_rewrite_typed;
                end;

              in_str_x_string :
                begin
                  result := handle_str;
                end;

              in_val_x :
                begin
                  result := handle_val;
                end;

              in_include_x_y,
              in_exclude_x_y:
                begin
                  resulttype:=voidtype;
                  { the parser already checks whether we have two (and exectly two) }
                  { parameters (JM)                                                 }
                  { first param must be var }
                  valid_for_var(tcallparanode(left).left);
                  set_varstate(tcallparanode(left).left,vs_used,true);
                  { check type }
                  if (left.resulttype.def.deftype=setdef) then
                    begin
                      { insert a type conversion       }
                      { to the type of the set elements  }
                      set_varstate(tcallparanode(tcallparanode(left).right).left,vs_used,true);
                      inserttypeconv(tcallparanode(tcallparanode(left).right).left,
                        tsetdef(left.resulttype.def).elementtype);
                    end
                  else
                    CGMessage(type_e_mismatch);
                end;

              in_low_x,
              in_high_x:
                begin
                  set_varstate(left,vs_used,false);
                  case left.resulttype.def.deftype of
                    orddef,
                    enumdef:
                      begin
                        result:=do_lowhigh(left.resulttype);
                      end;
                    setdef:
                      begin
                        result:=do_lowhigh(tsetdef(left.resulttype.def).elementtype);
                      end;
                    arraydef:
                      begin
                        if inlinenumber=in_low_x then
                         begin
                           result:=cordconstnode.create(tarraydef(
                            left.resulttype.def).lowrange,tarraydef(left.resulttype.def).rangetype,true);
                         end
                        else
                         begin
                           if is_open_array(left.resulttype.def) or
                              is_array_of_const(left.resulttype.def) then
                            begin
                              result:=load_high_value_node(tvarsym(tloadnode(left).symtableentry));
                            end
                           else
                            if is_dynamic_array(left.resulttype.def) then
                              begin
                                { can't use inserttypeconv because we need }
                                { an explicit type conversion (JM)         }
                                hp := ccallparanode.create(ctypeconvnode.create_explicit(left,voidpointertype),nil);
                                result := ccallnode.createintern('fpc_dynarray_high',hp);
                                { make sure the left node doesn't get disposed, since it's }
                                { reused in the new node (JM)                              }
                                left:=nil;
                              end
                           else
                            begin
                              result:=cordconstnode.create(tarraydef(
                               left.resulttype.def).highrange,tarraydef(left.resulttype.def).rangetype,true);
                            end;
                         end;
                      end;
                    stringdef:
                      begin
                        if inlinenumber=in_low_x then
                         begin
                           result:=cordconstnode.create(0,u8inttype,false);
                         end
                        else
                         begin
                           if is_open_string(left.resulttype.def) then
                            result:=load_high_value_node(tvarsym(tloadnode(left).symtableentry))
                           else
                            result:=cordconstnode.create(tstringdef(left.resulttype.def).len,u8inttype,true);
                         end;
                     end;
                    else
                      CGMessage(type_e_mismatch);
                  end;
                end;

             in_pi:
                begin
                  if block_type=bt_const then
                     setconstrealvalue(pi)
                  else
                     resulttype:=pbestrealtype^;
                end;
              in_cos_extended :
                begin
                  if left.nodetype in [ordconstn,realconstn] then
                   setconstrealvalue(cos(getconstrealvalue))
                  else
                   begin
                     set_varstate(left,vs_used,true);
                     inserttypeconv(left,pbestrealtype^);
                     resulttype:=pbestrealtype^;
                   end;
                end;

              in_sin_extended :
                begin
                  if left.nodetype in [ordconstn,realconstn] then
                   setconstrealvalue(sin(getconstrealvalue))
                  else
                   begin
                     set_varstate(left,vs_used,true);
                     inserttypeconv(left,pbestrealtype^);
                     resulttype:=pbestrealtype^;
                   end;
                end;

              in_arctan_extended :
                begin
                  if left.nodetype in [ordconstn,realconstn] then
                   setconstrealvalue(arctan(getconstrealvalue))
                  else
                   begin
                     set_varstate(left,vs_used,true);
                     inserttypeconv(left,pbestrealtype^);
                     resulttype:=pbestrealtype^;
                   end;
                end;

              in_abs_extended :
                begin
                  if left.nodetype in [ordconstn,realconstn] then
                   setconstrealvalue(abs(getconstrealvalue))
                  else
                   begin
                     set_varstate(left,vs_used,true);
                     inserttypeconv(left,pbestrealtype^);
                     resulttype:=pbestrealtype^;
                   end;
                end;

              in_sqr_extended :
                begin
                  if left.nodetype in [ordconstn,realconstn] then
                   setconstrealvalue(sqr(getconstrealvalue))
                  else
                   begin
                     set_varstate(left,vs_used,true);
                     inserttypeconv(left,pbestrealtype^);
                     resulttype:=pbestrealtype^;
                   end;
                end;

              in_sqrt_extended :
                begin
                  if left.nodetype in [ordconstn,realconstn] then
                   begin
                     vr:=getconstrealvalue;
                     if vr<0.0 then
                       result:=handle_sqrt_const(vr)
                     else
                       setconstrealvalue(sqrt(vr));
                   end
                  else
                   begin
                     set_varstate(left,vs_used,true);
                     inserttypeconv(left,pbestrealtype^);
                     resulttype:=pbestrealtype^;
                   end;
                end;

              in_ln_extended :
                begin
                  if left.nodetype in [ordconstn,realconstn] then
                   begin
                     vr:=getconstrealvalue;
                     if vr<=0.0 then
                       result:=handle_ln_const(vr)
                     else
                       setconstrealvalue(ln(vr));
                   end
                  else
                   begin
                     set_varstate(left,vs_used,true);
                     inserttypeconv(left,pbestrealtype^);
                     resulttype:=pbestrealtype^;
                   end;
                end;

 {$ifdef SUPPORT_MMX}
              in_mmx_pcmpeqb..in_mmx_pcmpgtw:
                begin
                end;
 {$endif SUPPORT_MMX}
              in_prefetch_var:
                begin
                  resulttype:=voidtype;
                end;
              in_assert_x_y :
                begin
                  resulttype:=voidtype;
                  if assigned(left) then
                    begin
                       set_varstate(tcallparanode(left).left,vs_used,true);
                       { check type }
                       if is_boolean(left.resulttype.def) then
                         begin
                            set_varstate(tcallparanode(tcallparanode(left).right).left,vs_used,true);
                            { must always be a string }
                            inserttypeconv(tcallparanode(tcallparanode(left).right).left,cshortstringtype);
                         end
                       else
                         CGMessage1(type_e_boolean_expr_expected,left.resulttype.def.typename);
                    end
                  else
                    CGMessage(type_e_mismatch);

                  { We've checked the whole statement for correctness, now we
                    can remove it if assertions are off }
                  if not(cs_do_assertion in aktlocalswitches) then
                    begin
                      { we need a valid node, so insert a nothingn }
                      result:=cnothingnode.create;
                    end
                   else
                     include(current_procinfo.flags,pi_do_call);
                end;

               else
                internalerror(8);
            end;
          end;

      myexit:
        { Run get_paratype again to update maybe inserted typeconvs }
        if not codegenerror then
         begin
           if assigned(left) and
              (left.nodetype=callparan) then
            tcallparanode(left).get_paratype;
         end;
        dec(parsing_para_level);
      end;


    function tinlinenode.pass_1 : tnode;
      var
         hp,hpp  : tnode;
         shiftconst: longint;
         tempnode: ttempcreatenode;
         newstatement: tstatementnode;
         newblock: tblocknode;

      begin
         result:=nil;
         { if we handle writeln; left contains no valid address }
         if assigned(left) then
           begin
              if left.nodetype=callparan then
                tcallparanode(left).firstcallparan
              else
                firstpass(left);
              left_max;
           end;

         inc(parsing_para_level);
         { intern const should already be handled }
         if nf_inlineconst in flags then
          internalerror(200104044);
         case inlinenumber of
          in_lo_qword,
          in_hi_qword,
          in_lo_long,
          in_hi_long,
          in_lo_word,
          in_hi_word:
            begin
              shiftconst := 0;
              case inlinenumber of
                in_hi_qword:
                  shiftconst := 32;
                in_hi_long:
                  shiftconst := 16;
                in_hi_word:
                  shiftconst := 8;
              end;
              if shiftconst <> 0 then
                result := ctypeconvnode.create_explicit(cshlshrnode.create(shrn,left,
                    cordconstnode.create(shiftconst,u32inttype,false)),resulttype)
              else
                result := ctypeconvnode.create_explicit(left,resulttype);
              left := nil;
              firstpass(result);
            end;

          in_sizeof_x:
            begin
              if registersint<1 then
                 registersint:=1;
              expectloc:=LOC_REGISTER;
            end;

          in_typeof_x:
            begin
               if registersint<1 then
                 registersint:=1;
               expectloc:=LOC_REGISTER;
            end;

          in_length_x:
            begin
               if is_shortstring(left.resulttype.def) then
                expectloc:=left.expectloc
               else
                begin
                  { ansi/wide string }
                  if registersint<1 then
                   registersint:=1;
                  expectloc:=LOC_REGISTER;
                end;
            end;

          in_typeinfo_x:
            begin
               expectloc:=LOC_REGISTER;
               registersint:=1;
            end;

          in_assigned_x:
            begin
              expectloc := LOC_JUMP;
              registersint:=1;
            end;

          in_pred_x,
          in_succ_x:
            begin
              if is_64bit(resulttype.def) then
               begin
                 if (registersint<2) then
                  registersint:=2
               end
              else
               begin
                 if (registersint<1) then
                  registersint:=1;
               end;
              expectloc:=LOC_REGISTER;
            end;

          in_setlength_x,
          in_initialize_x,
          in_finalize_x:
            begin
              expectloc:=LOC_VOID;
            end;

          in_inc_x,
          in_dec_x:
            begin
               expectloc:=LOC_VOID;

               { check type }
               if
{$ifndef cpu64bit}
                  is_64bit(left.resulttype.def) or
{$endif cpu64bit}
                  { range/overflow checking doesn't work properly }
                  { with the inc/dec code that's generated (JM)   }
                  (
                   (left.resulttype.def.deftype = orddef) and
                   not(is_char(left.resulttype.def)) and
                   not(is_boolean(left.resulttype.def)) and
                   (aktlocalswitches * [cs_check_overflow,cs_check_range] <> [])
                  ) then
                 { convert to simple add (JM) }
                 begin
                   newblock := internalstatements(newstatement);
                   { extra parameter? }
                   if assigned(tcallparanode(left).right) then
                     begin
                       { Yes, use for add node }
                       hpp := tcallparanode(tcallparanode(left).right).left;
                       tcallparanode(tcallparanode(left).right).left := nil;
                       if assigned(tcallparanode(tcallparanode(left).right).right) then
                         CGMessage(parser_e_illegal_expression);
                     end
                   else
                     { no, create constant 1 }
                     hpp := cordconstnode.create(1,tcallparanode(left).left.resulttype,false);
                   { make sure we don't call functions part of the left node twice (and generally }
                   { optimize the code generation)                                                }
                   if node_complexity(tcallparanode(left).left) > 1 then
                     begin
                       tempnode := ctempcreatenode.create_reg(voidpointertype,voidpointertype.def.size,tt_persistent);
                       addstatement(newstatement,tempnode);
                       addstatement(newstatement,cassignmentnode.create(ctemprefnode.create(tempnode),
                         caddrnode.create(tcallparanode(left).left.getcopy)));
                       hp := cderefnode.create(ctemprefnode.create(tempnode));
                       inserttypeconv_explicit(hp,tcallparanode(left).left.resulttype);
                     end
                   else
                     begin
                       hp := tcallparanode(left).left.getcopy;
                       tempnode := nil;
                     end;
                   { addition/substraction depending on inc/dec }
                   if inlinenumber = in_inc_x then
                     hpp := caddnode.create(addn,hp,hpp)
                   else
                     hpp := caddnode.create(subn,hp,hpp);
                   { assign result of addition }
                   addstatement(newstatement,cassignmentnode.create(hp.getcopy,hpp));
                   { deallocate the temp }
                   if assigned(tempnode) then
                     addstatement(newstatement,ctempdeletenode.create(tempnode));
                   { firstpass it }
                   firstpass(newblock);
                   { return new node }
                   result := newblock;
                 end
               else if (left.resulttype.def.deftype in [enumdef,pointerdef]) or
                       is_ordinal(left.resulttype.def) then
                 begin
                    { two paras ? }
                    if assigned(tcallparanode(left).right) then
                      begin
                         { need we an additional register ? }
                         if not(is_constintnode(tcallparanode(tcallparanode(left).right).left)) and
                           (tcallparanode(tcallparanode(left).right).left.expectloc in [LOC_CREFERENCE,LOC_REFERENCE]) and
                           (tcallparanode(tcallparanode(left).right).left.registersint<=1) then
                           inc(registersint);

                         { do we need an additional register to restore the first parameter? }
                         if tcallparanode(tcallparanode(left).right).left.registersint>=registersint then
                           inc(registersint);
                      end;
                 end;
            end;

         in_include_x_y,
         in_exclude_x_y:
           begin
              expectloc:=LOC_VOID;

              registersint:=left.registersint;
              registersfpu:=left.registersfpu;
{$ifdef SUPPORT_MMX}
              registersmmx:=left.registersmmx;
{$endif SUPPORT_MMX}
           end;

         in_cos_extended:
           begin
             result:= first_cos_real;
           end;

         in_sin_extended:
           begin
             result := first_sin_real;
           end;

         in_arctan_extended:
           begin
             result := first_arctan_real;
           end;

         in_pi:
           begin
             result := first_pi;
           end;

         in_abs_extended:
           begin
             result := first_abs_real;
           end;

         in_sqr_extended:
           begin
             result := first_sqr_real;
           end;

         in_sqrt_extended:
           begin
             result := first_sqrt_real;
           end;

         in_ln_extended:
           begin
             result := first_ln_real;
           end;

{$ifdef SUPPORT_MMX}
         in_mmx_pcmpeqb..in_mmx_pcmpgtw:
           begin
           end;
{$endif SUPPORT_MMX}

         in_assert_x_y :
            begin
              expectloc:=LOC_VOID;
              registersint:=left.registersint;
              registersfpu:=left.registersfpu;
{$ifdef SUPPORT_MMX}
              registersmmx:=left.registersmmx;
{$endif SUPPORT_MMX}
            end;

          in_low_x,
          in_high_x:
            internalerror(200104047);

          in_ord_x,
          in_chr_byte:
            begin
               { should not happend as it's converted to typeconv }
               internalerror(200104045);
            end;

          in_ofs_x :
            internalerror(2000101001);

          in_seg_x :
            internalerror(200104046);

          in_settextbuf_file_x,
          in_reset_typedfile,
          in_rewrite_typedfile,
          in_str_x_string,
          in_val_x,
          in_read_x,
          in_readln_x,
          in_write_x,
          in_writeln_x :
            begin
              { should be handled by det_resulttype }
              internalerror(200108234);
            end;

         in_prefetch_var:
           begin
             expectloc:=LOC_VOID;
           end;

          else
            internalerror(8);
          end;
         dec(parsing_para_level);
       end;
{$ifdef fpc}
{$maxfpuregisters default}
{$endif fpc}

    function tinlinenode.docompare(p: tnode): boolean;
      begin
        docompare :=
          inherited docompare(p) and
          (inlinenumber = tinlinenode(p).inlinenumber);
      end;


     function tinlinenode.first_pi : tnode;
      begin
        result := crealconstnode.create(pi,pbestrealtype^);
      end;


     function tinlinenode.first_arctan_real : tnode;
      begin
        { create the call to the helper }
        { on entry left node contains the parameter }
        first_arctan_real := ccallnode.createintern('fpc_arctan_real',
                ccallparanode.create(left,nil));
        left := nil;
      end;

     function tinlinenode.first_abs_real : tnode;
      begin
        { create the call to the helper }
        { on entry left node contains the parameter }
        first_abs_real := ccallnode.createintern('fpc_abs_real',
                ccallparanode.create(left,nil));
        left := nil;
      end;

     function tinlinenode.first_sqr_real : tnode;
      begin
        { create the call to the helper }
        { on entry left node contains the parameter }
        first_sqr_real := ccallnode.createintern('fpc_sqr_real',
                ccallparanode.create(left,nil));
        left := nil;
      end;

     function tinlinenode.first_sqrt_real : tnode;
      begin
        { create the call to the helper }
        { on entry left node contains the parameter }
        first_sqrt_real := ccallnode.createintern('fpc_sqrt_real',
                ccallparanode.create(left,nil));
        left := nil;
      end;

     function tinlinenode.first_ln_real : tnode;
      begin
        { create the call to the helper }
        { on entry left node contains the parameter }
        first_ln_real := ccallnode.createintern('fpc_ln_real',
                ccallparanode.create(left,nil));
        left := nil;
      end;

     function tinlinenode.first_cos_real : tnode;
      begin
        { create the call to the helper }
        { on entry left node contains the parameter }
        first_cos_real := ccallnode.createintern('fpc_cos_real',
                ccallparanode.create(left,nil));
        left := nil;
      end;

     function tinlinenode.first_sin_real : tnode;
      begin
        { create the call to the helper }
        { on entry left node contains the parameter }
        first_sin_real := ccallnode.createintern('fpc_sin_real',
                ccallparanode.create(left,nil));
        left := nil;
      end;


begin
   cinlinenode:=tinlinenode;
end.
{
  $Log$
  Revision 1.141  2004-07-15 19:55:39  jonas
    + (incomplete) node_complexity function to assess the complexity of a
      tree
    + support for inlining value and const parameters at the node level
      (all procedures without local variables and without formal parameters
       can now be inlined at the node level)

  Revision 1.140  2004/07/14 21:40:52  olle
    + added Ord(pointer) for macpas

  Revision 1.139  2004/07/14 14:38:35  jonas
    * fix for web bug 3210

  Revision 1.138  2004/06/20 08:55:29  florian
    * logs truncated

  Revision 1.137  2004/06/18 15:16:46  peter
    * remove obsolete cardinal() typecasts

  Revision 1.136  2004/06/16 20:07:08  florian
    * dwarf branch merged

  Revision 1.135  2004/05/28 21:15:20  peter
    * inc(x,y) makes y always of type x to prevent 64bit operations
      when x is a u32bit and y is signed

  Revision 1.134  2004/05/23 18:28:41  peter
    * methodpointer is loaded into a temp when it was a calln

  Revision 1.133.2.9  2004/05/03 16:49:00  peter
    * sizeof fixed

}