fpc/compiler/psystem.pas
Jonas Maebe 6165536b5e + added {$modeswitch objectivec1}/-Mobjectivec1 mode switch to enable
the use of Objective-C 1.0 constructs. Because it is a mode switch, it
    can be used cumulatively with every syntax mode. Note that a {$mode xxx}
    statement resets all mode switches as well, so you cannot use the
    -Mobjectivec1 variant if you have such a statement in a unit. This
    modeswitch is currently only enabled for Darwin/PowerPC and Darwin/i386,
    as the backend support is not yet implemented for other platforms.
  + implemented selector() statement that can be used to create an Objective-C
    selector for the message with the specified *constant* name (in the future,
    it will also work for Objective-C method identifiers)
  + added SEL type to the system unit (the selector() statement returns it)
  + added all Objective-C segments to the assembler writers
  + (currently mostly dummy) objc1 unit that is automatically included if the
    {$modeswitch objectivec1} statement is used
  + some tests for the selector() statement

git-svn-id: trunk@12870 -
2009-03-08 18:40:32 +00:00

591 lines
23 KiB
ObjectPascal

{
Copyright (c) 1998-2002 by Florian Klaempfl
Load the system unit, create required defs for systemunit
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 psystem;
{$i fpcdefs.inc}
interface
uses
symbase;
procedure create_intern_symbols;
procedure create_intern_types;
procedure load_intern_types;
procedure registernodes;
procedure registertais;
implementation
uses
globals,globtype,verbose,constexp,cpuinfo,
systems,
symconst,symtype,symsym,symdef,symtable,
aasmtai,aasmdata,aasmcpu,
ncgutil,ncgrtti,fmodule,
node,nbas,nflw,nset,ncon,ncnv,nld,nmem,ncal,nmat,nadd,ninl,nopt
;
procedure create_intern_symbols;
{
all intern procedures for the system unit
}
begin
systemunit.insert(tsyssym.create('Concat',in_concat_x));
systemunit.insert(tsyssym.create('Write',in_write_x));
systemunit.insert(tsyssym.create('WriteLn',in_writeln_x));
systemunit.insert(tsyssym.create('WriteStr',in_writestr_x));
systemunit.insert(tsyssym.create('Assigned',in_assigned_x));
systemunit.insert(tsyssym.create('Read',in_read_x));
systemunit.insert(tsyssym.create('ReadLn',in_readln_x));
systemunit.insert(tsyssym.create('ReadStr',in_readstr_x));
systemunit.insert(tsyssym.create('Ofs',in_ofs_x));
systemunit.insert(tsyssym.create('SizeOf',in_sizeof_x));
systemunit.insert(tsyssym.create('BitSizeOf',in_bitsizeof_x));
systemunit.insert(tsyssym.create('TypeOf',in_typeof_x));
systemunit.insert(tsyssym.create('Low',in_low_x));
systemunit.insert(tsyssym.create('High',in_high_x));
systemunit.insert(tsyssym.create('Slice',in_slice_x));
systemunit.insert(tsyssym.create('Seg',in_seg_x));
systemunit.insert(tsyssym.create('Ord',in_ord_x));
systemunit.insert(tsyssym.create('Pred',in_pred_x));
systemunit.insert(tsyssym.create('Succ',in_succ_x));
systemunit.insert(tsyssym.create('Exclude',in_exclude_x_y));
systemunit.insert(tsyssym.create('Include',in_include_x_y));
systemunit.insert(tsyssym.create('Pack',in_pack_x_y_z));
systemunit.insert(tsyssym.create('Unpack',in_unpack_x_y_z));
systemunit.insert(tsyssym.create('Break',in_break));
systemunit.insert(tsyssym.create('Exit',in_exit));
systemunit.insert(tsyssym.create('Continue',in_continue));
systemunit.insert(tsyssym.create('Leave',in_leave)); {macpas only}
systemunit.insert(tsyssym.create('Cycle',in_cycle)); {macpas only}
systemunit.insert(tsyssym.create('Dec',in_dec_x));
systemunit.insert(tsyssym.create('Inc',in_inc_x));
systemunit.insert(tsyssym.create('Str',in_str_x_string));
systemunit.insert(tsyssym.create('Assert',in_assert_x_y));
systemunit.insert(tsyssym.create('Val',in_val_x));
systemunit.insert(tsyssym.create('Addr',in_addr_x));
systemunit.insert(tsyssym.create('TypeInfo',in_typeinfo_x));
systemunit.insert(tsyssym.create('SetLength',in_setlength_x));
systemunit.insert(tsyssym.create('Copy',in_copy_x));
systemunit.insert(tsyssym.create('Initialize',in_initialize_x));
systemunit.insert(tsyssym.create('Finalize',in_finalize_x));
systemunit.insert(tsyssym.create('Length',in_length_x));
systemunit.insert(tsyssym.create('New',in_new_x));
systemunit.insert(tsyssym.create('Dispose',in_dispose_x));
{$if defined(x86) or defined(arm)}
systemunit.insert(tsyssym.create('Get_Frame',in_get_frame));
{$endif defined(x86) or defined(arm)}
{$ifdef SUPPORT_UNALIGNED}
systemunit.insert(tsyssym.create('Unaligned',in_unaligned_x));
{$endif SUPPORT_UNALIGNED}
systemunit.insert(tsyssym.create('Selector',in_objc_selector_x)); { objc only }
end;
procedure create_intern_types;
{
all the types inserted into the system unit
}
function addtype(const s:string;def:tdef):ttypesym;
begin
result:=ttypesym.create(s,def);
systemunit.insert(result);
end;
procedure addfield(recst:tabstractrecordsymtable;sym:tfieldvarsym);
begin
recst.insert(sym);
recst.addfield(sym,vis_hidden);
end;
procedure create_fpu_types;
begin
if init_settings.fputype<>fpu_none then
begin
s32floattype:=tfloatdef.create(s32real);
s64floattype:=tfloatdef.create(s64real);
s80floattype:=tfloatdef.create(s80real);
end else begin
s32floattype:=nil;
s64floattype:=nil;
s80floattype:=nil;
end;
end;
var
hrecst : trecordsymtable;
begin
symtablestack.push(systemunit);
cundefinedtype:=tundefineddef.create;
cformaltype:=tformaldef.create(false);
ctypedformaltype:=tformaldef.create(true);
voidtype:=torddef.create(uvoid,0,0);
u8inttype:=torddef.create(u8bit,0,255);
s8inttype:=torddef.create(s8bit,int64(-128),127);
u16inttype:=torddef.create(u16bit,0,65535);
s16inttype:=torddef.create(s16bit,int64(-32768),32767);
u32inttype:=torddef.create(u32bit,0,high(longword));
s32inttype:=torddef.create(s32bit,int64(low(longint)),int64(high(longint)));
u64inttype:=torddef.create(u64bit,low(qword),high(qword));
s64inttype:=torddef.create(s64bit,low(int64),high(int64));
booltype:=torddef.create(pasbool,0,1);
bool8type:=torddef.create(bool8bit,low(int64),high(int64));
bool16type:=torddef.create(bool16bit,low(int64),high(int64));
bool32type:=torddef.create(bool32bit,low(int64),high(int64));
bool64type:=torddef.create(bool64bit,low(int64),high(int64));
cchartype:=torddef.create(uchar,0,255);
cwidechartype:=torddef.create(uwidechar,0,65535);
cshortstringtype:=tstringdef.createshort(255);
{ should we give a length to the default long and ansi string definition ?? }
clongstringtype:=tstringdef.createlong(-1);
cansistringtype:=tstringdef.createansi;
if target_info.system in system_all_windows then
cwidestringtype:=tstringdef.createwide
else
cwidestringtype:=tstringdef.createunicode;
cunicodestringtype:=tstringdef.createunicode;
{ length=0 for shortstring is open string (needed for readln(string) }
openshortstringtype:=tstringdef.createshort(0);
openchararraytype:=tarraydef.create(0,-1,s32inttype);
tarraydef(openchararraytype).elementdef:=cchartype;
{$ifdef x86}
create_fpu_types;
if target_info.system<>system_x86_64_win64 then
s64currencytype:=tfloatdef.create(s64currency)
else
begin
s64currencytype:=torddef.create(scurrency,low(int64),high(int64));
pbestrealtype:=@s64floattype;
end;
{$endif x86}
{$ifdef powerpc}
create_fpu_types;
s64currencytype:=torddef.create(scurrency,low(int64),high(int64));
{$endif powerpc}
{$ifdef POWERPC64}
create_fpu_types;
s64currencytype:=torddef.create(scurrency,low(int64),high(int64));
{$endif POWERPC64}
{$ifdef sparc}
create_fpu_types;
s64currencytype:=torddef.create(scurrency,low(int64),high(int64));
{$endif sparc}
{$ifdef m68k}
create_fpu_types;
s64currencytype:=torddef.create(scurrency,low(int64),high(int64));
{$endif}
{$ifdef arm}
create_fpu_types;
s64currencytype:=torddef.create(scurrency,low(int64),high(int64));
{$endif arm}
{$ifdef avr}
s32floattype:=tfloatdef.create(s32real);
s64floattype:=tfloatdef.create(s64real);
s80floattype:=tfloatdef.create(s80real);
s64currencytype:=torddef.create(scurrency,low(int64),high(int64));
{$endif avr}
{$ifdef cpu64bitaddr}
uinttype:=u64inttype;
sinttype:=s64inttype;
ptruinttype:=u64inttype;
ptrsinttype:=s64inttype;
{$endif cpu64bitaddr}
{$ifdef cpu32bit}
uinttype:=u32inttype;
sinttype:=s32inttype;
ptruinttype:=u32inttype;
ptrsinttype:=s32inttype;
{$endif cpu32bit}
{$ifdef cpu16bit}
uinttype:=u16inttype;
sinttype:=s16inttype;
ptruinttype:=u16inttype;
ptrsinttype:=s16inttype;
{$endif cpu16bit}
{ some other definitions }
voidpointertype:=tpointerdef.create(voidtype);
charpointertype:=tpointerdef.create(cchartype);
widecharpointertype:=tpointerdef.create(cwidechartype);
voidfarpointertype:=tpointerdef.createfar(voidtype);
cfiletype:=tfiledef.createuntyped;
cvarianttype:=tvariantdef.create(vt_normalvariant);
colevarianttype:=tvariantdef.create(vt_olevariant);
{$ifdef cpufpemu}
{ Normal types }
(* we use the same types as without emulator, the only
difference is that direct calls to the emulator are generated
if (cs_fp_emulation in current_settings.moduleswitches) then
begin
addtype('Single',s32floattype);
{ extended size is the best real type for the target }
addtype('Real',s32floattype);
pbestrealtype:=@s32floattype;
{ extended size is the best real type for the target }
addtype('Extended',pbestrealtype^);
end
else
*)
{$endif cpufpemu}
if init_settings.fputype <> fpu_none then
begin
addtype('Single',s32floattype);
addtype('Double',s64floattype);
{ extended size is the best real type for the target }
addtype('Extended',pbestrealtype^);
end;
{$ifdef x86}
if target_info.system<>system_x86_64_win64 then
addtype('Comp',tfloatdef.create(s64comp));
{$endif x86}
addtype('Currency',s64currencytype);
addtype('Pointer',voidpointertype);
{$ifdef x86}
addtype('FarPointer',voidfarpointertype);
{$endif x86}
addtype('ShortString',cshortstringtype);
{$ifdef support_longstring}
addtype('LongString',clongstringtype);
{$endif support_longstring}
addtype('AnsiString',cansistringtype);
addtype('WideString',cwidestringtype);
addtype('UnicodeString',cunicodestringtype);
addtype('OpenString',openshortstringtype);
addtype('Boolean',booltype);
addtype('ByteBool',bool8type);
addtype('WordBool',bool16type);
addtype('LongBool',bool32type);
addtype('QWordBool',bool64type);
addtype('Byte',u8inttype);
addtype('ShortInt',s8inttype);
addtype('Word',u16inttype);
addtype('SmallInt',s16inttype);
addtype('LongWord',u32inttype);
addtype('LongInt',s32inttype);
addtype('QWord',u64inttype);
addtype('Int64',s64inttype);
addtype('Char',cchartype);
addtype('WideChar',cwidechartype);
addtype('Text',tfiledef.createtext);
addtype('TypedFile',tfiledef.createtyped(voidtype));
addtype('Variant',cvarianttype);
addtype('OleVariant',colevarianttype);
{ Internal types }
addtype('$undefined',cundefinedtype);
addtype('$formal',cformaltype);
addtype('$typedformal',ctypedformaltype);
addtype('$void',voidtype);
addtype('$byte',u8inttype);
addtype('$shortint',s8inttype);
addtype('$word',u16inttype);
addtype('$smallint',s16inttype);
addtype('$ulong',u32inttype);
addtype('$longint',s32inttype);
addtype('$qword',u64inttype);
addtype('$int64',s64inttype);
addtype('$char',cchartype);
addtype('$widechar',cwidechartype);
addtype('$shortstring',cshortstringtype);
addtype('$longstring',clongstringtype);
addtype('$ansistring',cansistringtype);
addtype('$widestring',cwidestringtype);
addtype('$unicodestring',cunicodestringtype);
addtype('$openshortstring',openshortstringtype);
addtype('$boolean',booltype);
addtype('$boolean8',bool8type);
addtype('$boolean16',bool16type);
addtype('$boolean32',bool32type);
addtype('$boolean64',bool64type);
addtype('$void_pointer',voidpointertype);
addtype('$char_pointer',charpointertype);
addtype('$widechar_pointer',widecharpointertype);
addtype('$void_farpointer',voidfarpointertype);
addtype('$openchararray',openchararraytype);
addtype('$file',cfiletype);
addtype('$variant',cvarianttype);
addtype('$olevariant',cvarianttype);
if init_settings.fputype<>fpu_none then
begin
addtype('$s32real',s32floattype);
addtype('$s64real',s64floattype);
addtype('$s80real',s80floattype);
end;
addtype('$s64currency',s64currencytype);
{ Add a type for virtual method tables }
hrecst:=trecordsymtable.create(current_settings.packrecords);
vmttype:=trecorddef.create(hrecst);
pvmttype:=tpointerdef.create(vmttype);
{ can't use addtype for pvmt because the rtti of the pointed
type is not available. The rtti for pvmt will be written implicitly
by thev tblarray below }
systemunit.insert(ttypesym.create('$pvmt',pvmttype));
addfield(hrecst,tfieldvarsym.create('$length',vs_value,ptrsinttype,[]));
addfield(hrecst,tfieldvarsym.create('$mlength',vs_value,ptrsinttype,[]));
addfield(hrecst,tfieldvarsym.create('$parent',vs_value,pvmttype,[]));
{ it seems vmttype is used both for TP objects and Delphi classes,
so the next entry could either be the first virtual method (vm1)
(object) or the class name (class). We can't easily create separate
vtable formats for both, as gdb is hard coded to search for
__vtbl_ptr_type in all cases (JM) }
addfield(hrecst,tfieldvarsym.create('$vm1_or_classname',vs_value,tpointerdef.create(cshortstringtype),[]));
vmtarraytype:=tarraydef.create(0,0,s32inttype);
tarraydef(vmtarraytype).elementdef:=voidpointertype;
addfield(hrecst,tfieldvarsym.create('$__pfn',vs_value,vmtarraytype,[]));
addtype('$__vtbl_ptr_type',vmttype);
vmtarraytype:=tarraydef.create(0,1,s32inttype);
tarraydef(vmtarraytype).elementdef:=pvmttype;
addtype('$vtblarray',vmtarraytype);
{ Add a type for methodpointers }
hrecst:=trecordsymtable.create(1);
addfield(hrecst,tfieldvarsym.create('$proc',vs_value,voidpointertype,[]));
addfield(hrecst,tfieldvarsym.create('$self',vs_value,voidpointertype,[]));
methodpointertype:=trecorddef.create(hrecst);
addtype('$methodpointer',methodpointertype);
symtablestack.pop(systemunit);
end;
procedure load_intern_types;
{
Load all default definitions for consts from the system unit
}
procedure loadtype(const s:string;var def:tdef);
var
srsym : ttypesym;
begin
srsym:=search_system_type(s);
def:=srsym.typedef;
end;
var
oldcurrentmodule : tmodule;
begin
if target_info.system=system_x86_64_win64 then
pbestrealtype:=@s64floattype;
oldcurrentmodule:=current_module;
set_current_module(nil);
loadtype('byte',u8inttype);
loadtype('shortint',s8inttype);
loadtype('word',u16inttype);
loadtype('smallint',s16inttype);
loadtype('ulong',u32inttype);
loadtype('longint',s32inttype);
loadtype('qword',u64inttype);
loadtype('int64',s64inttype);
loadtype('undefined',cundefinedtype);
loadtype('formal',cformaltype);
loadtype('typedformal',ctypedformaltype);
loadtype('void',voidtype);
loadtype('char',cchartype);
loadtype('widechar',cwidechartype);
loadtype('shortstring',cshortstringtype);
loadtype('longstring',clongstringtype);
loadtype('ansistring',cansistringtype);
loadtype('widestring',cwidestringtype);
loadtype('unicodestring',cunicodestringtype);
loadtype('openshortstring',openshortstringtype);
loadtype('openchararray',openchararraytype);
if init_settings.fputype <> fpu_none then
begin
loadtype('s32real',s32floattype);
loadtype('s64real',s64floattype);
loadtype('s80real',s80floattype);
end;
loadtype('s64currency',s64currencytype);
loadtype('boolean',booltype);
loadtype('boolean8',bool8type);
loadtype('boolean16',bool16type);
loadtype('boolean32',bool32type);
loadtype('boolean64',bool64type);
loadtype('void_pointer',voidpointertype);
loadtype('char_pointer',charpointertype);
loadtype('widechar_pointer',widecharpointertype);
loadtype('void_farpointer',voidfarpointertype);
loadtype('file',cfiletype);
loadtype('pvmt',pvmttype);
loadtype('vtblarray',vmtarraytype);
loadtype('__vtbl_ptr_type',vmttype);
loadtype('variant',cvarianttype);
loadtype('olevariant',colevarianttype);
loadtype('methodpointer',methodpointertype);
loadtype('HRESULT',hresultdef);
{$ifdef cpu64bitaddr}
uinttype:=u64inttype;
sinttype:=s64inttype;
ptruinttype:=u64inttype;
ptrsinttype:=s64inttype;
{$endif cpu64bitaddr}
{$ifdef cpu32bit}
uinttype:=u32inttype;
sinttype:=s32inttype;
ptruinttype:=u32inttype;
ptrsinttype:=s32inttype;
{$endif cpu32bit}
{$ifdef cpu16bit}
uinttype:=u16inttype;
sinttype:=s16inttype;
ptruinttype:=u16inttype;
ptrsinttype:=s16inttype;
{$endif cpu16bit}
set_current_module(oldcurrentmodule);
end;
procedure registernodes;
{
Register all possible nodes in the nodeclass array that
will be used for loading the nodes from a ppu
}
begin
nodeclass[addn]:=caddnode;
nodeclass[muln]:=caddnode;
nodeclass[subn]:=caddnode;
nodeclass[divn]:=cmoddivnode;
nodeclass[symdifn]:=caddnode;
nodeclass[modn]:=cmoddivnode;
nodeclass[assignn]:=cassignmentnode;
nodeclass[loadn]:=cloadnode;
nodeclass[rangen]:=crangenode;
nodeclass[ltn]:=caddnode;
nodeclass[lten]:=caddnode;
nodeclass[gtn]:=caddnode;
nodeclass[gten]:=caddnode;
nodeclass[equaln]:=caddnode;
nodeclass[unequaln]:=caddnode;
nodeclass[inn]:=cinnode;
nodeclass[orn]:=caddnode;
nodeclass[xorn]:=caddnode;
nodeclass[shrn]:=cshlshrnode;
nodeclass[shln]:=cshlshrnode;
nodeclass[slashn]:=caddnode;
nodeclass[andn]:=caddnode;
nodeclass[subscriptn]:=csubscriptnode;
nodeclass[derefn]:=cderefnode;
nodeclass[addrn]:=caddrnode;
nodeclass[ordconstn]:=cordconstnode;
nodeclass[typeconvn]:=ctypeconvnode;
nodeclass[calln]:=ccallnode;
nodeclass[callparan]:=ccallparanode;
nodeclass[realconstn]:=crealconstnode;
nodeclass[unaryminusn]:=cunaryminusnode;
nodeclass[asmn]:=casmnode;
nodeclass[vecn]:=cvecnode;
nodeclass[pointerconstn]:=cpointerconstnode;
nodeclass[stringconstn]:=cstringconstnode;
nodeclass[notn]:=cnotnode;
nodeclass[inlinen]:=cinlinenode;
nodeclass[niln]:=cnilnode;
nodeclass[errorn]:=cerrornode;
nodeclass[typen]:=ctypenode;
nodeclass[setelementn]:=csetelementnode;
nodeclass[setconstn]:=csetconstnode;
nodeclass[blockn]:=cblocknode;
nodeclass[statementn]:=cstatementnode;
nodeclass[ifn]:=cifnode;
nodeclass[breakn]:=cbreaknode;
nodeclass[continuen]:=ccontinuenode;
nodeclass[whilerepeatn]:=cwhilerepeatnode;
nodeclass[forn]:=cfornode;
nodeclass[exitn]:=cexitnode;
nodeclass[withn]:=cwithnode;
nodeclass[casen]:=ccasenode;
nodeclass[labeln]:=clabelnode;
nodeclass[goton]:=cgotonode;
nodeclass[tryexceptn]:=ctryexceptnode;
nodeclass[raisen]:=craisenode;
nodeclass[tryfinallyn]:=ctryfinallynode;
nodeclass[onn]:=connode;
nodeclass[isn]:=cisnode;
nodeclass[asn]:=casnode;
nodeclass[starstarn]:=caddnode;
nodeclass[arrayconstructorn]:=carrayconstructornode;
nodeclass[arrayconstructorrangen]:=carrayconstructorrangenode;
nodeclass[tempcreaten]:=ctempcreatenode;
nodeclass[temprefn]:=ctemprefnode;
nodeclass[tempdeleten]:=ctempdeletenode;
nodeclass[addoptn]:=caddnode;
nodeclass[nothingn]:=cnothingnode;
nodeclass[loadvmtaddrn]:=cloadvmtaddrnode;
nodeclass[guidconstn]:=cguidconstnode;
nodeclass[rttin]:=crttinode;
nodeclass[loadparentfpn]:=cloadparentfpnode;
end;
procedure registertais;
{
Register all possible tais in the taiclass array that
will be used for loading the tais from a ppu
}
begin
aiclass[ait_none]:=nil;
aiclass[ait_align]:=tai_align;
aiclass[ait_section]:=tai_section;
aiclass[ait_comment]:=tai_comment;
aiclass[ait_string]:=tai_string;
aiclass[ait_instruction]:=taicpu;
aiclass[ait_datablock]:=tai_datablock;
aiclass[ait_symbol]:=tai_symbol;
aiclass[ait_symbol_end]:=tai_symbol_end;
aiclass[ait_directive]:=tai_directive;
aiclass[ait_label]:=tai_label;
aiclass[ait_const]:=tai_const;
aiclass[ait_real_32bit]:=tai_real_32bit;
aiclass[ait_real_64bit]:=tai_real_64bit;
aiclass[ait_real_80bit]:=tai_real_80bit;
aiclass[ait_comp_64bit]:=tai_comp_64bit;
aiclass[ait_stab]:=tai_stab;
aiclass[ait_force_line]:=tai_force_line;
aiclass[ait_function_name]:=tai_function_name;
{$ifdef alpha}
{ the follow is for the DEC Alpha }
aiclass[ait_frame]:=tai_frame;
aiclass[ait_ent]:=tai_ent;
{$endif alpha}
{$ifdef m68k}
{ TODO: FIXME: tai_labeled_instruction doesn't exists}
// aiclass[ait_labeled_instruction]:=tai_labeled_instruction;
{$endif m68k}
{$ifdef ia64}
aiclass[ait_bundle]:=tai_bundle;
aiclass[ait_stop]:=tai_stop;
{$endif ia64}
{$ifdef SPARC}
// aiclass[ait_labeled_instruction]:=tai_labeled_instruction;
{$endif SPARC}
aiclass[ait_cutobject]:=tai_cutobject;
aiclass[ait_regalloc]:=tai_regalloc;
aiclass[ait_tempalloc]:=tai_tempalloc;
aiclass[ait_marker]:=tai_marker;
end;
end.