fpc/compiler/globtype.pas

{
    Copyright (c) 1998-2002 by Florian Klaempfl, Pierre Muller

    Global types

    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 globtype;

{$i fpcdefs.inc}

interface

    const
       maxidlen = 127;

    type
       { TCmdStr is used to pass command line parameters to an external program to be
         executed from the FPC application. In some circomstances, this can be more
         than 255 characters. That's why using Ansi Strings}
       TCmdStr = AnsiString;
       TPathStr = String;

       { Integer type corresponding to pointer size }
{$ifdef cpu64bitaddr}
       PUint = qword;
       PInt = int64;
{$endif cpu64bitaddr}
{$ifdef cpu32bitaddr}
       PUint = cardinal;
       PInt = longint;
{$endif cpu32bitaddr}
{$ifdef cpu16bitaddr}
       PUint = word;
       PInt = Smallint;
{$endif cpu16bitaddr}

       { Natural integer register type and size for the target machine }
{$ifdef cpu64bitalu}
       AWord = qword;
       AInt = Int64;

     Const
       AIntBits = 64;
{$endif cpu64bitalu}
{$ifdef cpu32bitalu}
       AWord = longword;
       AInt = longint;

     Const
       AIntBits = 32;
{$endif cpu32bitalu}
{$ifdef cpu16bitalu}
       AWord = Word;
       AInt = Smallint;

     Const
       AIntBits = 16;
{$endif cpu16bitalu}

     Type
       PAWord = ^AWord;
       PAInt = ^AInt;

       { This must be an ordinal type with the same size as a pointer
         Note: Must be unsigned! Otherwise, ugly code like
         pointer(-1) will result in a pointer with the value
         $fffffffffffffff on a 32bit machine if the compiler uses
         int64 constants internally (JM) }
       TConstPtrUInt = AWord;

       { Use a variant record to be sure that the array if aligned correctly }
       tdoublerec=record
         case byte of
           0 : (bytes:array[0..7] of byte);
           1 : (value:double);
       end;
       textendedrec=record
         case byte of
           0 : (bytes:array[0..9] of byte);
           1 : (value:extended);
       end;

       pconstset = ^tconstset;
       tconstset = set of 0..255;

       { Switches which can be changed locally }
       tlocalswitch = (cs_localnone,
         { codegen }
         cs_check_overflow,cs_check_range,cs_check_object,
         cs_check_io,cs_check_stack,
         cs_checkpointer,cs_check_ordinal_size,
         cs_generate_stackframes,cs_do_assertion,cs_generate_rtti,
         cs_full_boolean_eval,cs_typed_const_writable,cs_allow_enum_calc,
         cs_do_inline,cs_fpu_fwait,
         { mmx }
         cs_mmx,cs_mmx_saturation,
         { parser }
         cs_typed_addresses,cs_strict_var_strings,cs_ansistrings,cs_bitpacking,
         { macpas specific}
         cs_external_var, cs_externally_visible
       );
       tlocalswitches = set of tlocalswitch;

       { Switches which can be changed only at the beginning of a new module }
       tmoduleswitch = (cs_modulenone,
         { parser }
         cs_fp_emulation,cs_extsyntax,cs_openstring,
         { support }
         cs_support_goto,cs_support_macro,
         cs_support_c_operators,cs_static_keyword,
         { generation }
         cs_profile,cs_debuginfo,cs_compilesystem,
         cs_lineinfo,cs_implicit_exceptions,
         { linking }
         cs_create_smart,cs_create_dynamic,cs_create_pic,
         { browser switches are back }
         cs_browser,cs_local_browser,
         { target specific }
         cs_executable_stack
       );
       tmoduleswitches = set of tmoduleswitch;

       { Switches which can be changed only for a whole program/compilation,
         mostly set with commandline }
       tglobalswitch = (cs_globalnone,
         { parameter switches }
         cs_check_unit_name,cs_constructor_name,cs_support_exceptions,
         cs_support_c_objectivepas,
         { units }
         cs_load_objpas_unit,
         cs_load_gpc_unit,
         cs_load_fpcylix_unit,
         cs_support_vectors,
         { debuginfo }
         cs_use_heaptrc,cs_use_lineinfo,
         cs_gdb_valgrind,cs_no_regalloc,cs_stabs_preservecase,
         { assembling }
         cs_asm_leave,cs_asm_extern,cs_asm_pipe,cs_asm_source,
         cs_asm_regalloc,cs_asm_tempalloc,cs_asm_nodes,
         { linking }
         cs_link_nolink,cs_link_static,cs_link_smart,cs_link_shared,cs_link_deffile,
         cs_link_strip,cs_link_staticflag,cs_link_on_target,cs_link_extern,cs_link_opt_vtable,
         cs_link_opt_used_sections,cs_link_separate_dbg_file,
         cs_link_map,cs_link_pthread,cs_link_no_default_lib_order
       );
       tglobalswitches = set of tglobalswitch;

       { global switches specific to debug information }
       tdebugswitch = (ds_none,
          { enable set support in dwarf debug info, breaks gdb versions }
          { without support for that tag (they refuse to parse the rest }
          { of the debug information)                                   }
          ds_dwarf_sets,
          { use absolute paths for include files in stabs. Pro: gdb     }
          { always knows full path to file. Con: doesn't work anymore   }
          { if the include file is moved (otherwise, things still work  }
          { if your source hierarchy is the same, but has a different   }
          { base path)                                                  }
          ds_stabs_abs_include_files
       );
       tdebugswitches = set of tdebugswitch;


       { adding a new entry here requires also adding the appropriate define in
         systemh.inc (FK)
       }
       tfeature = (
         f_heap,f_init_final,f_rtti,f_classes,f_exceptions,f_exitcode,
         f_ansistrings,f_widestrings,f_textio,f_consoleio,f_fileio,
         f_random,f_variants,f_objects,f_dynarrays,f_threading,f_commandargs,
         f_processes,f_stackcheck,f_dynlibs,f_softfpu,f_objectivec1
       );
       tfeatures = set of tfeature;

     type
       { optimizer }
       toptimizerswitch = (cs_opt_none,
         cs_opt_level1,cs_opt_level2,cs_opt_level3,
         cs_opt_regvar,cs_opt_uncertain,cs_opt_size,cs_opt_stackframe,
         cs_opt_peephole,cs_opt_asmcse,cs_opt_loopunroll,cs_opt_tailrecursion,cs_opt_nodecse,
         cs_opt_nodedfa,cs_opt_loopstrength
       );
       toptimizerswitches = set of toptimizerswitch;

       { whole program optimizer }
       twpoptimizerswitch = (
         cs_wpo_devirtualize_calls,cs_wpo_optimize_vmts,
         cs_wpo_symbol_liveness
       );
       twpoptimizerswitches = set of twpoptimizerswitch;


    const
       OptimizerSwitchStr : array[toptimizerswitch] of string[10] = ('',
         'LEVEL1','LEVEL2','LEVEL3',
         'REGVAR','UNCERTAIN','SIZE','STACKFRAME',
         'PEEPHOLE','ASMCSE','LOOPUNROLL','TAILREC','CSE','DFA','STRENGTH'
       );
       WPOptimizerSwitchStr : array [twpoptimizerswitch] of string[14] = (
         'DEVIRTCALLS','OPTVMTS','SYMBOLLIVENESS'
       );

       DebugSwitchStr : array[tdebugswitch] of string[16] = ('',
         'DWARFSETS','STABSABSINCLUDES');

       { switches being applied to all CPUs at the given level }
       genericlevel1optimizerswitches = [cs_opt_level1];
       genericlevel2optimizerswitches = [cs_opt_level2];
       genericlevel3optimizerswitches = [cs_opt_level3];

       { whole program optimizations whose information generation requires
         information from all loaded units
       }
       WPOptimizationsNeedingAllUnitInfo = [cs_wpo_devirtualize_calls];

       featurestr : array[tfeature] of string[12] = (
         'HEAP','INITFINAL','RTTI','CLASSES','EXCEPTIONS','EXITCODE',
         'ANSISTRINGS','WIDESTRINGS','TEXTIO','CONSOLEIO','FILEIO',
         'RANDOM','VARIANTS','OBJECTS','DYNARRAYS','THREADING','COMMANDARGS',
         'PROCESSES','STACKCHECK','DYNLIBS','SOFTFPU','OBJECTIVEC1'
       );

    type
       { Switches which can be changed by a mode (fpc,tp7,delphi) }
       tmodeswitch = (m_none,m_all, { needed for keyword }
         { generic }
         m_fpc,m_objfpc,m_delphi,m_tp7,m_mac,
         {$ifdef fpc_mode}m_gpc,{$endif}
         { more specific }
         m_class,               { delphi class model }
         m_objpas,              { load objpas unit }
         m_result,              { result in functions }
         m_string_pchar,        { pchar 2 string conversion }
         m_cvar_support,        { cvar variable directive }
         m_nested_comment,      { nested comments }
         m_tp_procvar,          { tp style procvars (no @ needed) }
         m_mac_procvar,         { macpas style procvars }
         m_repeat_forward,      { repeating forward declarations is needed }
         m_pointer_2_procedure, { allows the assignement of pointers to
                                  procedure variables                     }
         m_autoderef,           { does auto dereferencing of struct. vars }
         m_initfinal,           { initialization/finalization for units }
         m_add_pointer,         { allow pointer add/sub operations }
         m_default_ansistring,  { ansistring turned on by default }
         m_out,                 { support the calling convention OUT }
         m_default_para,        { support default parameters }
         m_hintdirective,       { support hint directives }
         m_duplicate_names,     { allow locals/paras to have duplicate names of globals }
         m_property,            { allow properties }
         m_default_inline,      { allow inline proc directive }
         m_except,              { allow exception-related keywords }
         m_objectivec1          { support interfacing with Objective-C (1.0) }
       );
       tmodeswitches = set of tmodeswitch;

       { Win32, OS/2 & MacOS application types }
       tapptype = (
         app_none,
         app_native,
         app_gui,               { graphic user-interface application}
         app_cui,       { console application}
         app_fs,        { full-screen type application (OS/2 and EMX only) }
         app_tool,      { tool application, (MPW tool for MacOS, MacOS only)}
         app_arm7,
         app_arm9,
         app_bundle     { dynamically loadable bundle, Darwin only }
       );

       { interface types }
       tinterfacetypes = (
         it_interfacecom,
         it_interfacecorba
       );

       { currently parsed block type }
       tblock_type = (bt_none,
         bt_general,bt_type,bt_const,bt_const_type,bt_var,bt_var_type,bt_except,bt_body
       );

       { Temp types }
       ttemptype = (tt_none,
                    tt_free,tt_normal,tt_persistent,
                    tt_noreuse,tt_freenoreuse);
       ttemptypeset = set of ttemptype;

       { calling convention for tprocdef and tprocvardef }
       tproccalloption=(pocall_none,
         { procedure uses C styled calling }
         pocall_cdecl,
         { C++ calling conventions }
         pocall_cppdecl,
         { Far16 for OS/2 }
         pocall_far16,
         { Old style FPC default calling }
         pocall_oldfpccall,
         { Procedure has compiler magic}
         pocall_internproc,
         { procedure is a system call, applies e.g. to MorphOS and PalmOS }
         pocall_syscall,
         { pascal standard left to right }
         pocall_pascal,
         { procedure uses register (fastcall) calling }
         pocall_register,
         { safe call calling conventions }
         pocall_safecall,
         { procedure uses stdcall call }
         pocall_stdcall,
         { Special calling convention for cpus without a floating point
           unit. Floating point numbers are passed in integer registers
           instead of floating point registers. Depending on the other
           available calling conventions available for the cpu
           this replaces either pocall_fastcall or pocall_stdcall.
         }
         pocall_softfloat,
         { Metrowerks Pascal. Special case on Mac OS (X): passes all }
         { constant records by reference.                            }
         pocall_mwpascal
       );
       tproccalloptions = set of tproccalloption;

     const
       proccalloptionStr : array[tproccalloption] of string[14]=('',
           'CDecl',
           'CPPDecl',
           'Far16',
           'OldFPCCall',
           'InternProc',
           'SysCall',
           'Pascal',
           'Register',
           'SafeCall',
           'StdCall',
           'SoftFloat',
           'MWPascal'
         );

       { Default calling convention }
{$ifdef x86}
       pocall_default = pocall_register;
{$else}
       pocall_default = pocall_stdcall;
{$endif}

       modeswitchstr : array[tmodeswitch] of string[18] = ('','',
         '','','','','',
         {$ifdef fpc_mode}'',{$endif}
         { more specific }
         'CLASS',
         'OBJPAS',
         'RESULT',
         'PCHARTOSTRING',
         'CVAR',
         'NESTEDCOMMENTS',
         'CLASSICPROCVARS',
         'MACPROCVARS',
         'REPEATFORWARD',
         'POINTERTOPROCVAR',
         'AUTODEREF',
         'INITFINAL',
         'POINTERARITHMETICS',
         'ANSISTRINGS',
         'OUT',
         'DEFAULTPARAMETERS',
         'HINTDIRECTIVE',
         'DUPLICATELOCALS',
         'PROPERTIES',
         'ALLOWINLINE',
         'EXCEPTIONS',
         'OBJECTIVEC1');


     type
       tprocinfoflag=(
         { procedure has at least one assembler block }
         pi_has_assembler_block,
         { procedure does a call }
         pi_do_call,
         { procedure has a try statement = no register optimization }
         pi_uses_exceptions,
         { procedure is declared as @var(assembler), don't optimize}
         pi_is_assembler,
         { procedure contains data which needs to be finalized }
         pi_needs_implicit_finally,
         { procedure has the implicit try..finally generated }
         pi_has_implicit_finally,
         { procedure uses fpu}
         pi_uses_fpu,
         { procedure uses GOT for PIC code }
         pi_needs_got,
         { references var/proc/type/const in static symtable,
           i.e. not allowed for inlining from other units }
         pi_uses_static_symtable,
         { set if the procedure has to push parameters onto the stack }
         pi_has_stackparameter,
         { set if the procedure has at least one got }
         pi_has_goto,
         { calls itself recursive }
         pi_is_recursive,
         { stack frame optimization not possible (only on x86 probably) }
         pi_needs_stackframe,
         { set if the procedure has at least one register saved on the stack }
         pi_has_saved_regs,
         { dfa was generated for this proc }
         pi_dfaavailable
       );
       tprocinfoflags=set of tprocinfoflag;

    type
      { float types }
      tfloattype = (
        s32real,s64real,s80real,
        s64comp,s64currency,s128real
      );

    type
      { register allocator live range extension direction }
      TRADirection = (rad_forward, rad_backwards, rad_backwards_reinit);

    type
       TIDString = string[maxidlen];

       tnormalset = set of byte; { 256 elements set }
       pnormalset = ^tnormalset;

       pboolean   = ^boolean;
       pdouble    = ^double;
       pbyte      = ^byte;
       pword      = ^word;
       plongint   = ^longint;
       plongintarray = plongint;

       pfileposinfo = ^tfileposinfo;
       tfileposinfo = record
         { if types of column or fileindex are changed, modify tcompilerppufile.putposinfo }
         line      : longint;
         column    : word;
         fileindex : word;
         moduleindex : word;
       end;

  {$ifndef xFPC}
    type
      pguid = ^tguid;
      tguid = packed record
        D1: LongWord;
        D2: Word;
        D3: Word;
        D4: array[0..7] of Byte;
      end;
  {$endif}

    const
       { link options }
       link_none    = $0;
       link_always  = $1;
       link_static  = $2;
       link_smart   = $4;
       link_shared  = $8;

implementation

end.