+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- F R O N T E N D --
--- --
--- B o d y --
--- --
--- $Revision: 1.3.10.1 $
--- --
--- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
--- --
--- GNAT is free software; you can redistribute it and/or modify it under --
--- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
--- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
--- OUT 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 distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
-with Atree; use Atree;
-with Checks;
-with CStand;
-with Debug; use Debug;
-with Elists;
-with Exp_Ch11;
-with Exp_Dbug;
-with Fmap;
-with Fname.UF;
-with Hostparm; use Hostparm;
-with Inline; use Inline;
-with Lib; use Lib;
-with Lib.Load; use Lib.Load;
-with Live; use Live;
-with Namet; use Namet;
-with Nlists; use Nlists;
-with Opt; use Opt;
-with Osint;
-with Output; use Output;
-with Par;
-with Rtsfind;
-with Sprint;
-with Scn; use Scn;
-with Sem; use Sem;
-with Sem_Ch8; use Sem_Ch8;
-with Sem_Elab; use Sem_Elab;
-with Sem_Prag; use Sem_Prag;
-with Sem_Warn; use Sem_Warn;
-with Sinfo; use Sinfo;
-with Sinput; use Sinput;
-with Sinput.L; use Sinput.L;
-with Types; use Types;
-
-procedure Frontend is
- Pragmas : List_Id;
- Prag : Node_Id;
-
- Save_Style_Check : constant Boolean := Opt.Style_Check;
- -- Save style check mode so it can be restored later
-
-begin
- -- Carry out package initializations. These are initializations which
- -- might logically be performed at elaboration time, were it not for
- -- the fact that we may be doing things more than once in the big loop
- -- over files. Like elaboration, the order in which these calls are
- -- made is in some cases important. For example, Lib cannot be
- -- initialized until Namet, since it uses names table entries.
-
- Rtsfind.Initialize;
- Atree.Initialize;
- Nlists.Initialize;
- Elists.Initialize;
- Lib.Load.Initialize;
- Sem_Ch8.Initialize;
- Fname.UF.Initialize;
- Exp_Ch11.Initialize;
- Checks.Initialize;
-
- -- Create package Standard
-
- CStand.Create_Standard;
-
- -- Read and process gnat.adc file if one is present
-
- if Opt.Config_File then
-
- -- We always analyze the gnat.adc file with style checks off,
- -- since we don't want a miscellaneous gnat.adc that is around
- -- to discombobulate intended -gnatg compilations.
-
- Opt.Style_Check := False;
-
- -- Capture current suppress options, which may get modified
-
- Scope_Suppress := Opt.Suppress_Options;
-
- Name_Buffer (1 .. 8) := "gnat.adc";
- Name_Len := 8;
- Source_gnat_adc := Load_Config_File (Name_Enter);
-
- if Source_gnat_adc /= No_Source_File then
- Initialize_Scanner (No_Unit, Source_gnat_adc);
- Pragmas := Par (Configuration_Pragmas => True);
-
- if Pragmas /= Error_List
- and then Operating_Mode /= Check_Syntax
- then
- Prag := First (Pragmas);
- while Present (Prag) loop
- Analyze_Pragma (Prag);
- Next (Prag);
- end loop;
- end if;
- end if;
-
- -- Restore style check, but if gnat.adc turned on checks, leave on!
-
- Opt.Style_Check := Save_Style_Check or Style_Check;
-
- -- Capture any modifications to suppress options from config pragmas
-
- Opt.Suppress_Options := Scope_Suppress;
- end if;
-
- -- Read and process the configuration pragmas file if one is present
-
- if Config_File_Name /= null then
-
- declare
- New_Pragmas : List_Id;
- Style_Check_Saved : constant Boolean := Opt.Style_Check;
- Source_Config_File : Source_File_Index := No_Source_File;
-
- begin
- -- We always analyze the config pragmas file with style checks off,
- -- since we don't want it to discombobulate intended
- -- -gnatg compilations.
-
- Opt.Style_Check := False;
-
- -- Capture current suppress options, which may get modified
-
- Scope_Suppress := Opt.Suppress_Options;
-
- Name_Buffer (1 .. Config_File_Name'Length) := Config_File_Name.all;
- Name_Len := Config_File_Name'Length;
- Source_Config_File := Load_Config_File (Name_Enter);
-
- if Source_Config_File = No_Source_File then
- Osint.Fail
- ("cannot find configuration pragmas file ",
- Config_File_Name.all);
- end if;
-
- Initialize_Scanner (No_Unit, Source_Config_File);
- New_Pragmas := Par (Configuration_Pragmas => True);
-
- if New_Pragmas /= Error_List
- and then Operating_Mode /= Check_Syntax
- then
- Prag := First (New_Pragmas);
- while Present (Prag) loop
- Analyze_Pragma (Prag);
- Next (Prag);
- end loop;
- end if;
-
- -- Restore style check, but if the config pragmas file
- -- turned on checks, leave on!
-
- Opt.Style_Check := Style_Check_Saved or Style_Check;
-
- -- Capture any modifications to suppress options from config pragmas
-
- Opt.Suppress_Options := Scope_Suppress;
- end;
-
- end if;
-
- -- If there was a -gnatem switch, initialize the mappings of unit names to
- -- file names and of file names to path names from the mapping file.
-
- if Mapping_File_Name /= null then
- Fmap.Initialize (Mapping_File_Name.all);
- end if;
-
- -- We have now processed the command line switches, and the gnat.adc
- -- file, so this is the point at which we want to capture the values
- -- of the configuration switches (see Opt for further details).
-
- Opt.Register_Opt_Config_Switches;
-
- -- Initialize the scanner. Note that we do this after the call to
- -- Create_Standard, which uses the scanner in its processing of
- -- floating-point bounds.
-
- Initialize_Scanner (Main_Unit, Source_Index (Main_Unit));
-
- -- Output header if in verbose mode or full list mode
-
- if Verbose_Mode or Full_List then
- Write_Eol;
-
- if Operating_Mode = Generate_Code then
- Write_Str ("Compiling: ");
- else
- Write_Str ("Checking: ");
- end if;
-
- Write_Name (Full_File_Name (Current_Source_File));
-
- if not Debug_Flag_7 then
- Write_Str (" (source file time stamp: ");
- Write_Time_Stamp (Current_Source_File);
- Write_Char (')');
- end if;
-
- Write_Eol;
- end if;
-
- -- Here we call the parser to parse the compilation unit (or units in
- -- the check syntax mode, but in that case we won't go on to the
- -- semantics in any case).
-
- declare
- Discard : List_Id;
-
- begin
- Discard := Par (Configuration_Pragmas => False);
- end;
-
- -- The main unit is now loaded, and subunits of it can be loaded,
- -- without reporting spurious loading circularities.
-
- Set_Loading (Main_Unit, False);
-
- -- Now on to the semantics. We skip the semantics if we are in syntax
- -- only mode, or if we encountered a fatal error during the parsing.
-
- if Operating_Mode /= Check_Syntax
- and then not Fatal_Error (Main_Unit)
- then
- -- Reset Operating_Mode to Check_Semantics for subunits. We cannot
- -- actually generate code for subunits, so we suppress expansion.
- -- This also corrects certain problems that occur if we try to
- -- incorporate subunits at a lower level.
-
- if Operating_Mode = Generate_Code
- and then Nkind (Unit (Cunit (Main_Unit))) = N_Subunit
- then
- Operating_Mode := Check_Semantics;
- end if;
-
- -- Analyze (and possibly expand) main unit
-
- Scope_Suppress := Suppress_Options;
- Semantics (Cunit (Main_Unit));
-
- -- Cleanup processing after completing main analysis
-
- if Operating_Mode = Generate_Code
- or else (Operating_Mode = Check_Semantics
- and then Tree_Output)
- then
- Instantiate_Bodies;
- end if;
-
- if Operating_Mode = Generate_Code then
-
- if Inline_Processing_Required then
- Analyze_Inlined_Bodies;
- end if;
-
- -- Remove entities from program that do not have any
- -- execution time references.
-
- if Debug_Flag_UU then
- Collect_Garbage_Entities;
- end if;
-
- Check_Elab_Calls;
-
- -- Build unit exception table. We leave this up to the end to
- -- make sure that all the necessary information is at hand.
-
- Exp_Ch11.Generate_Unit_Exception_Table;
-
- -- Save the unit name and list of packages named in Use_Package
- -- clauses for subsequent use in generating a special symbol for
- -- the debugger for certain targets that require this.
-
- Exp_Dbug.Save_Unitname_And_Use_List
- (Cunit (Main_Unit), Nkind (Unit (Cunit (Main_Unit))));
- end if;
-
- -- List library units if requested
-
- if List_Units then
- Lib.List;
- end if;
-
- -- Output any messages for unreferenced entities
-
- Output_Unreferenced_Messages;
- Sem_Warn.Check_Unused_Withs;
- end if;
-
- -- Qualify all entity names in inner packages, package bodies, etc.,
- -- except when compiling for the JVM back end, which depends on
- -- having unqualified names in certain cases and handles the generation
- -- of qualified names when needed.
-
- if not Java_VM then
- Exp_Dbug.Qualify_All_Entity_Names;
- Exp_Dbug.Generate_Auxiliary_Types;
- end if;
-
- -- Dump the source now. Note that we do this as soon as the analysis
- -- of the tree is complete, because it is not just a dump in the case
- -- of -gnatD, where it rewrites all source locations in the tree.
-
- Sprint.Source_Dump;
-end Frontend;
projects / msp430-gcc.git / blobdiff