gcc/ada/opt.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                                  O P T                                   --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with Gnatvsn; use Gnatvsn;
  35 with System;  use System;
  36 with Tree_IO; use Tree_IO;
  37
  38 package body Opt is
  39
  40    SU : constant := Storage_Unit;
  41    --  Shorthand for System.Storage_Unit
  42
  43    ----------------------------------
  44    -- Register_Opt_Config_Switches --
  45    ----------------------------------
  46
  47    procedure Register_Opt_Config_Switches is
  48    begin
  49       Ada_Version_Config                    := Ada_Version;
  50       Ada_Version_Explicit_Config           := Ada_Version_Explicit;
  51       Assertions_Enabled_Config             := Assertions_Enabled;
  52       Debug_Pragmas_Enabled_Config          := Debug_Pragmas_Enabled;
  53       Dynamic_Elaboration_Checks_Config     := Dynamic_Elaboration_Checks;
  54       Exception_Locations_Suppressed_Config := Exception_Locations_Suppressed;
  55       Extensions_Allowed_Config             := Extensions_Allowed;
  56       External_Name_Exp_Casing_Config       := External_Name_Exp_Casing;
  57       External_Name_Imp_Casing_Config       := External_Name_Imp_Casing;
  58       Fast_Math_Config                      := Fast_Math;
  59       Optimize_Alignment_Config             := Optimize_Alignment;
  60       Persistent_BSS_Mode_Config            := Persistent_BSS_Mode;
  61       Polling_Required_Config               := Polling_Required;
  62       Use_VADS_Size_Config                  := Use_VADS_Size;
  63    end Register_Opt_Config_Switches;
  64
  65    ---------------------------------
  66    -- Restore_Opt_Config_Switches --
  67    ---------------------------------
  68
  69    procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type) is
  70    begin
  71       Ada_Version                    := Save.Ada_Version;
  72       Ada_Version_Explicit           := Save.Ada_Version_Explicit;
  73       Assertions_Enabled             := Save.Assertions_Enabled;
  74       Debug_Pragmas_Enabled          := Save.Debug_Pragmas_Enabled;
  75       Dynamic_Elaboration_Checks     := Save.Dynamic_Elaboration_Checks;
  76       Exception_Locations_Suppressed := Save.Exception_Locations_Suppressed;
  77       Extensions_Allowed             := Save.Extensions_Allowed;
  78       External_Name_Exp_Casing       := Save.External_Name_Exp_Casing;
  79       External_Name_Imp_Casing       := Save.External_Name_Imp_Casing;
  80       Fast_Math                      := Save.Fast_Math;
  81       Optimize_Alignment             := Save.Optimize_Alignment;
  82       Persistent_BSS_Mode            := Save.Persistent_BSS_Mode;
  83       Polling_Required               := Save.Polling_Required;
  84       Use_VADS_Size                  := Save.Use_VADS_Size;
  85    end Restore_Opt_Config_Switches;
  86
  87    ------------------------------
  88    -- Save_Opt_Config_Switches --
  89    ------------------------------
  90
  91    procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type) is
  92    begin
  93       Save.Ada_Version                    := Ada_Version;
  94       Save.Ada_Version_Explicit           := Ada_Version_Explicit;
  95       Save.Assertions_Enabled             := Assertions_Enabled;
  96       Save.Debug_Pragmas_Enabled          := Debug_Pragmas_Enabled;
  97       Save.Dynamic_Elaboration_Checks     := Dynamic_Elaboration_Checks;
  98       Save.Exception_Locations_Suppressed := Exception_Locations_Suppressed;
  99       Save.Extensions_Allowed             := Extensions_Allowed;
 100       Save.External_Name_Exp_Casing       := External_Name_Exp_Casing;
 101       Save.External_Name_Imp_Casing       := External_Name_Imp_Casing;
 102       Save.Fast_Math                      := Fast_Math;
 103       Save.Optimize_Alignment             := Optimize_Alignment;
 104       Save.Persistent_BSS_Mode            := Persistent_BSS_Mode;
 105       Save.Polling_Required               := Polling_Required;
 106       Save.Use_VADS_Size                  := Use_VADS_Size;
 107    end Save_Opt_Config_Switches;
 108
 109    -----------------------------
 110    -- Set_Opt_Config_Switches --
 111    -----------------------------
 112
 113    procedure Set_Opt_Config_Switches
 114      (Internal_Unit : Boolean;
 115       Main_Unit     : Boolean)
 116    is
 117    begin
 118       --  Case of internal unit
 119
 120       if Internal_Unit then
 121
 122          --  Set standard switches. Note we do NOT set Ada_Version_Explicit
 123          --  since the whole point of this is that it still properly indicates
 124          --  the configuration setting even in a run time unit.
 125
 126          Ada_Version                := Ada_Version_Runtime;
 127          Dynamic_Elaboration_Checks := False;
 128          Extensions_Allowed         := True;
 129          External_Name_Exp_Casing   := As_Is;
 130          External_Name_Imp_Casing   := Lowercase;
 131          Optimize_Alignment         := 'O';
 132          Persistent_BSS_Mode        := False;
 133          Use_VADS_Size              := False;
 134
 135          --  For an internal unit, assertions/debug pragmas are off unless this
 136          --  is the main unit and they were explicitly enabled.
 137
 138          if Main_Unit then
 139             Assertions_Enabled    := Assertions_Enabled_Config;
 140             Debug_Pragmas_Enabled := Debug_Pragmas_Enabled_Config;
 141          else
 142             Assertions_Enabled    := False;
 143             Debug_Pragmas_Enabled := False;
 144          end if;
 145
 146       --  Case of non-internal unit
 147
 148       else
 149          Ada_Version                := Ada_Version_Config;
 150          Ada_Version_Explicit       := Ada_Version_Explicit_Config;
 151          Assertions_Enabled         := Assertions_Enabled_Config;
 152          Debug_Pragmas_Enabled      := Debug_Pragmas_Enabled_Config;
 153          Dynamic_Elaboration_Checks := Dynamic_Elaboration_Checks_Config;
 154          Extensions_Allowed         := Extensions_Allowed_Config;
 155          External_Name_Exp_Casing   := External_Name_Exp_Casing_Config;
 156          External_Name_Imp_Casing   := External_Name_Imp_Casing_Config;
 157          Fast_Math                  := Fast_Math_Config;
 158          Optimize_Alignment         := Optimize_Alignment_Config;
 159          Persistent_BSS_Mode        := Persistent_BSS_Mode_Config;
 160          Use_VADS_Size              := Use_VADS_Size_Config;
 161       end if;
 162
 163       Exception_Locations_Suppressed := Exception_Locations_Suppressed_Config;
 164       Fast_Math                      := Fast_Math_Config;
 165       Optimize_Alignment             := Optimize_Alignment_Config;
 166       Polling_Required               := Polling_Required_Config;
 167    end Set_Opt_Config_Switches;
 168
 169    ---------------
 170    -- Tree_Read --
 171    ---------------
 172
 173    procedure Tree_Read is
 174       Tree_Version_String_Len         : Nat;
 175       Ada_Version_Config_Val          : Nat;
 176       Ada_Version_Explicit_Config_Val : Nat;
 177       Assertions_Enabled_Config_Val   : Nat;
 178
 179    begin
 180       Tree_Read_Int  (Tree_ASIS_Version_Number);
 181       Tree_Read_Bool (Brief_Output);
 182       Tree_Read_Bool (GNAT_Mode);
 183       Tree_Read_Char (Identifier_Character_Set);
 184       Tree_Read_Int  (Maximum_File_Name_Length);
 185       Tree_Read_Data (Suppress_Options'Address,
 186                       (Suppress_Options'Size + SU - 1) / SU);
 187       Tree_Read_Bool (Verbose_Mode);
 188       Tree_Read_Data (Warning_Mode'Address,
 189                       (Warning_Mode'Size + SU - 1) / SU);
 190       Tree_Read_Int  (Ada_Version_Config_Val);
 191       Tree_Read_Int  (Ada_Version_Explicit_Config_Val);
 192       Tree_Read_Int  (Assertions_Enabled_Config_Val);
 193       Tree_Read_Bool (All_Errors_Mode);
 194       Tree_Read_Bool (Assertions_Enabled);
 195       Tree_Read_Bool (Debug_Pragmas_Enabled);
 196       Tree_Read_Bool (Enable_Overflow_Checks);
 197       Tree_Read_Bool (Full_List);
 198
 199       Ada_Version_Config :=
 200         Ada_Version_Type'Val (Ada_Version_Config_Val);
 201       Ada_Version_Explicit_Config :=
 202         Ada_Version_Type'Val (Ada_Version_Explicit_Config_Val);
 203       Assertions_Enabled_Config :=
 204         Boolean'Val (Assertions_Enabled_Config_Val);
 205
 206       --  Read version string: we have to get the length first
 207
 208       Tree_Read_Int (Tree_Version_String_Len);
 209
 210       declare
 211          Tmp : String (1 .. Integer (Tree_Version_String_Len));
 212       begin
 213          Tree_Read_Data
 214            (Tmp'Address, Tree_Version_String_Len);
 215          System.Strings.Free (Tree_Version_String);
 216          Free (Tree_Version_String);
 217          Tree_Version_String := new String'(Tmp);
 218       end;
 219
 220       Tree_Read_Data (Distribution_Stub_Mode'Address,
 221                       (Distribution_Stub_Mode'Size + SU - 1) / Storage_Unit);
 222       Tree_Read_Bool (Inline_Active);
 223       Tree_Read_Bool (Inline_Processing_Required);
 224       Tree_Read_Bool (List_Units);
 225       Tree_Read_Bool (Configurable_Run_Time_Mode);
 226       Tree_Read_Data (Operating_Mode'Address,
 227                       (Operating_Mode'Size + SU - 1) / Storage_Unit);
 228       Tree_Read_Bool (Suppress_Checks);
 229       Tree_Read_Bool (Try_Semantics);
 230       Tree_Read_Data (Wide_Character_Encoding_Method'Address,
 231                       (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 232       Tree_Read_Bool (Upper_Half_Encoding);
 233       Tree_Read_Bool (Force_ALI_Tree_File);
 234    end Tree_Read;
 235
 236    ----------------
 237    -- Tree_Write --
 238    ----------------
 239
 240    procedure Tree_Write is
 241       Version_String : String := Gnat_Version_String;
 242
 243    begin
 244       Tree_Write_Int  (ASIS_Version_Number);
 245       Tree_Write_Bool (Brief_Output);
 246       Tree_Write_Bool (GNAT_Mode);
 247       Tree_Write_Char (Identifier_Character_Set);
 248       Tree_Write_Int  (Maximum_File_Name_Length);
 249       Tree_Write_Data (Suppress_Options'Address,
 250                        (Suppress_Options'Size + SU - 1) / SU);
 251       Tree_Write_Bool (Verbose_Mode);
 252       Tree_Write_Data (Warning_Mode'Address,
 253                        (Warning_Mode'Size + SU - 1) / Storage_Unit);
 254       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Config));
 255       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Explicit_Config));
 256       Tree_Write_Int  (Boolean'Pos (Assertions_Enabled_Config));
 257       Tree_Write_Bool (All_Errors_Mode);
 258       Tree_Write_Bool (Assertions_Enabled);
 259       Tree_Write_Bool (Debug_Pragmas_Enabled);
 260       Tree_Write_Bool (Enable_Overflow_Checks);
 261       Tree_Write_Bool (Full_List);
 262       Tree_Write_Int  (Int (Version_String'Length));
 263       Tree_Write_Data (Version_String'Address, Version_String'Length);
 264       Tree_Write_Data (Distribution_Stub_Mode'Address,
 265                        (Distribution_Stub_Mode'Size + SU - 1) / SU);
 266       Tree_Write_Bool (Inline_Active);
 267       Tree_Write_Bool (Inline_Processing_Required);
 268       Tree_Write_Bool (List_Units);
 269       Tree_Write_Bool (Configurable_Run_Time_Mode);
 270       Tree_Write_Data (Operating_Mode'Address,
 271                        (Operating_Mode'Size + SU - 1) / SU);
 272       Tree_Write_Bool (Suppress_Checks);
 273       Tree_Write_Bool (Try_Semantics);
 274       Tree_Write_Data (Wide_Character_Encoding_Method'Address,
 275                        (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 276       Tree_Write_Bool (Upper_Half_Encoding);
 277       Tree_Write_Bool (Force_ALI_Tree_File);
 278    end Tree_Write;
 279
 280 end Opt;