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) 1992-2010, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with Gnatvsn; use Gnatvsn;
  33 with System;  use System;
  34 with Tree_IO; use Tree_IO;
  35
  36 package body Opt is
  37
  38    SU : constant := Storage_Unit;
  39    --  Shorthand for System.Storage_Unit
  40
  41    ----------------------------------
  42    -- Register_Opt_Config_Switches --
  43    ----------------------------------
  44
  45    procedure Register_Opt_Config_Switches is
  46    begin
  47       Ada_Version_Config                    := Ada_Version;
  48       Ada_Version_Explicit_Config           := Ada_Version_Explicit;
  49       Assertions_Enabled_Config             := Assertions_Enabled;
  50       Assume_No_Invalid_Values_Config       := Assume_No_Invalid_Values;
  51       Check_Policy_List_Config              := Check_Policy_List;
  52       Debug_Pragmas_Enabled_Config          := Debug_Pragmas_Enabled;
  53       Default_Pool_Config                   := Default_Pool;
  54       Dynamic_Elaboration_Checks_Config     := Dynamic_Elaboration_Checks;
  55       Exception_Locations_Suppressed_Config := Exception_Locations_Suppressed;
  56       Extensions_Allowed_Config             := Extensions_Allowed;
  57       External_Name_Exp_Casing_Config       := External_Name_Exp_Casing;
  58       External_Name_Imp_Casing_Config       := External_Name_Imp_Casing;
  59       Fast_Math_Config                      := Fast_Math;
  60       Init_Or_Norm_Scalars_Config           := Init_Or_Norm_Scalars;
  61       Initialize_Scalars_Config             := Initialize_Scalars;
  62       Optimize_Alignment_Config             := Optimize_Alignment;
  63       Persistent_BSS_Mode_Config            := Persistent_BSS_Mode;
  64       Polling_Required_Config               := Polling_Required;
  65       Short_Descriptors_Config              := Short_Descriptors;
  66       Use_VADS_Size_Config                  := Use_VADS_Size;
  67
  68       --  Reset the indication that Optimize_Alignment was set locally, since
  69       --  if we had a pragma in the config file, it would set this flag True,
  70       --  but that's not a local setting.
  71
  72       Optimize_Alignment_Local := False;
  73    end Register_Opt_Config_Switches;
  74
  75    ---------------------------------
  76    -- Restore_Opt_Config_Switches --
  77    ---------------------------------
  78
  79    procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type) is
  80    begin
  81       Ada_Version                    := Save.Ada_Version;
  82       Ada_Version_Explicit           := Save.Ada_Version_Explicit;
  83       Assertions_Enabled             := Save.Assertions_Enabled;
  84       Assume_No_Invalid_Values       := Save.Assume_No_Invalid_Values;
  85       Check_Policy_List              := Save.Check_Policy_List;
  86       Debug_Pragmas_Enabled          := Save.Debug_Pragmas_Enabled;
  87       Default_Pool                   := Save.Default_Pool;
  88       Dynamic_Elaboration_Checks     := Save.Dynamic_Elaboration_Checks;
  89       Exception_Locations_Suppressed := Save.Exception_Locations_Suppressed;
  90       Extensions_Allowed             := Save.Extensions_Allowed;
  91       External_Name_Exp_Casing       := Save.External_Name_Exp_Casing;
  92       External_Name_Imp_Casing       := Save.External_Name_Imp_Casing;
  93       Fast_Math                      := Save.Fast_Math;
  94       Init_Or_Norm_Scalars           := Save.Init_Or_Norm_Scalars;
  95       Initialize_Scalars             := Save.Initialize_Scalars;
  96       Optimize_Alignment             := Save.Optimize_Alignment;
  97       Optimize_Alignment_Local       := Save.Optimize_Alignment_Local;
  98       Persistent_BSS_Mode            := Save.Persistent_BSS_Mode;
  99       Polling_Required               := Save.Polling_Required;
 100       Short_Descriptors              := Save.Short_Descriptors;
 101       Use_VADS_Size                  := Save.Use_VADS_Size;
 102    end Restore_Opt_Config_Switches;
 103
 104    ------------------------------
 105    -- Save_Opt_Config_Switches --
 106    ------------------------------
 107
 108    procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type) is
 109    begin
 110       Save.Ada_Version                    := Ada_Version;
 111       Save.Ada_Version_Explicit           := Ada_Version_Explicit;
 112       Save.Assertions_Enabled             := Assertions_Enabled;
 113       Save.Assume_No_Invalid_Values       := Assume_No_Invalid_Values;
 114       Save.Check_Policy_List              := Check_Policy_List;
 115       Save.Debug_Pragmas_Enabled          := Debug_Pragmas_Enabled;
 116       Save.Default_Pool                   := Default_Pool;
 117       Save.Dynamic_Elaboration_Checks     := Dynamic_Elaboration_Checks;
 118       Save.Exception_Locations_Suppressed := Exception_Locations_Suppressed;
 119       Save.Extensions_Allowed             := Extensions_Allowed;
 120       Save.External_Name_Exp_Casing       := External_Name_Exp_Casing;
 121       Save.External_Name_Imp_Casing       := External_Name_Imp_Casing;
 122       Save.Fast_Math                      := Fast_Math;
 123       Save.Init_Or_Norm_Scalars           := Init_Or_Norm_Scalars;
 124       Save.Initialize_Scalars             := Initialize_Scalars;
 125       Save.Optimize_Alignment             := Optimize_Alignment;
 126       Save.Optimize_Alignment_Local       := Optimize_Alignment_Local;
 127       Save.Persistent_BSS_Mode            := Persistent_BSS_Mode;
 128       Save.Polling_Required               := Polling_Required;
 129       Save.Short_Descriptors              := Short_Descriptors;
 130       Save.Use_VADS_Size                  := Use_VADS_Size;
 131    end Save_Opt_Config_Switches;
 132
 133    -----------------------------
 134    -- Set_Opt_Config_Switches --
 135    -----------------------------
 136
 137    procedure Set_Opt_Config_Switches
 138      (Internal_Unit : Boolean;
 139       Main_Unit     : Boolean)
 140    is
 141    begin
 142       --  Case of internal unit
 143
 144       if Internal_Unit then
 145
 146          --  Set standard switches. Note we do NOT set Ada_Version_Explicit
 147          --  since the whole point of this is that it still properly indicates
 148          --  the configuration setting even in a run time unit.
 149
 150          Ada_Version                 := Ada_Version_Runtime;
 151          Dynamic_Elaboration_Checks  := False;
 152          Extensions_Allowed          := True;
 153          External_Name_Exp_Casing    := As_Is;
 154          External_Name_Imp_Casing    := Lowercase;
 155          Optimize_Alignment          := 'O';
 156          Persistent_BSS_Mode         := False;
 157          Use_VADS_Size               := False;
 158          Optimize_Alignment_Local    := True;
 159
 160          --  For an internal unit, assertions/debug pragmas are off unless this
 161          --  is the main unit and they were explicitly enabled. We also make
 162          --  sure we do not assume that values are necessarily valid.
 163
 164          if Main_Unit then
 165             Assertions_Enabled       := Assertions_Enabled_Config;
 166             Assume_No_Invalid_Values := Assume_No_Invalid_Values_Config;
 167             Debug_Pragmas_Enabled    := Debug_Pragmas_Enabled_Config;
 168             Check_Policy_List        := Check_Policy_List_Config;
 169          else
 170             Assertions_Enabled       := False;
 171             Assume_No_Invalid_Values := False;
 172             Debug_Pragmas_Enabled    := False;
 173             Check_Policy_List        := Empty;
 174          end if;
 175
 176       --  Case of non-internal unit
 177
 178       else
 179          Ada_Version                 := Ada_Version_Config;
 180          Ada_Version_Explicit        := Ada_Version_Explicit_Config;
 181          Assertions_Enabled          := Assertions_Enabled_Config;
 182          Assume_No_Invalid_Values    := Assume_No_Invalid_Values_Config;
 183          Check_Policy_List           := Check_Policy_List_Config;
 184          Debug_Pragmas_Enabled       := Debug_Pragmas_Enabled_Config;
 185          Dynamic_Elaboration_Checks  := Dynamic_Elaboration_Checks_Config;
 186          Extensions_Allowed          := Extensions_Allowed_Config;
 187          External_Name_Exp_Casing    := External_Name_Exp_Casing_Config;
 188          External_Name_Imp_Casing    := External_Name_Imp_Casing_Config;
 189          Fast_Math                   := Fast_Math_Config;
 190          Init_Or_Norm_Scalars        := Init_Or_Norm_Scalars_Config;
 191          Initialize_Scalars          := Initialize_Scalars_Config;
 192          Optimize_Alignment          := Optimize_Alignment_Config;
 193          Optimize_Alignment_Local    := False;
 194          Persistent_BSS_Mode         := Persistent_BSS_Mode_Config;
 195          Use_VADS_Size               := Use_VADS_Size_Config;
 196       end if;
 197
 198       Default_Pool                   := Default_Pool_Config;
 199       Exception_Locations_Suppressed := Exception_Locations_Suppressed_Config;
 200       Fast_Math                      := Fast_Math_Config;
 201       Optimize_Alignment             := Optimize_Alignment_Config;
 202       Polling_Required               := Polling_Required_Config;
 203       Short_Descriptors              := Short_Descriptors_Config;
 204    end Set_Opt_Config_Switches;
 205
 206    ---------------
 207    -- Tree_Read --
 208    ---------------
 209
 210    procedure Tree_Read is
 211       Tree_Version_String_Len         : Nat;
 212       Ada_Version_Config_Val          : Nat;
 213       Ada_Version_Explicit_Config_Val : Nat;
 214       Assertions_Enabled_Config_Val   : Nat;
 215
 216    begin
 217       Tree_Read_Int  (Tree_ASIS_Version_Number);
 218       Tree_Read_Bool (Brief_Output);
 219       Tree_Read_Bool (GNAT_Mode);
 220       Tree_Read_Char (Identifier_Character_Set);
 221       Tree_Read_Int  (Maximum_File_Name_Length);
 222       Tree_Read_Data (Suppress_Options'Address,
 223                       (Suppress_Options'Size + SU - 1) / SU);
 224       Tree_Read_Bool (Verbose_Mode);
 225       Tree_Read_Data (Warning_Mode'Address,
 226                       (Warning_Mode'Size + SU - 1) / SU);
 227       Tree_Read_Int  (Ada_Version_Config_Val);
 228       Tree_Read_Int  (Ada_Version_Explicit_Config_Val);
 229       Tree_Read_Int  (Assertions_Enabled_Config_Val);
 230       Tree_Read_Bool (All_Errors_Mode);
 231       Tree_Read_Bool (Assertions_Enabled);
 232       Tree_Read_Int  (Int (Check_Policy_List));
 233       Tree_Read_Bool (Debug_Pragmas_Enabled);
 234       Tree_Read_Int  (Int (Default_Pool));
 235       Tree_Read_Bool (Enable_Overflow_Checks);
 236       Tree_Read_Bool (Full_List);
 237
 238       Ada_Version_Config :=
 239         Ada_Version_Type'Val (Ada_Version_Config_Val);
 240       Ada_Version_Explicit_Config :=
 241         Ada_Version_Type'Val (Ada_Version_Explicit_Config_Val);
 242       Assertions_Enabled_Config :=
 243         Boolean'Val (Assertions_Enabled_Config_Val);
 244
 245       --  Read version string: we have to get the length first
 246
 247       Tree_Read_Int (Tree_Version_String_Len);
 248
 249       declare
 250          Tmp : String (1 .. Integer (Tree_Version_String_Len));
 251       begin
 252          Tree_Read_Data
 253            (Tmp'Address, Tree_Version_String_Len);
 254          System.Strings.Free (Tree_Version_String);
 255          Free (Tree_Version_String);
 256          Tree_Version_String := new String'(Tmp);
 257       end;
 258
 259       Tree_Read_Data (Distribution_Stub_Mode'Address,
 260                       (Distribution_Stub_Mode'Size + SU - 1) / Storage_Unit);
 261       Tree_Read_Bool (Inline_Active);
 262       Tree_Read_Bool (Inline_Processing_Required);
 263       Tree_Read_Bool (List_Units);
 264       Tree_Read_Bool (Configurable_Run_Time_Mode);
 265       Tree_Read_Data (Operating_Mode'Address,
 266                       (Operating_Mode'Size + SU - 1) / Storage_Unit);
 267       Tree_Read_Bool (Suppress_Checks);
 268       Tree_Read_Bool (Try_Semantics);
 269       Tree_Read_Data (Wide_Character_Encoding_Method'Address,
 270                       (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 271       Tree_Read_Bool (Upper_Half_Encoding);
 272       Tree_Read_Bool (Force_ALI_Tree_File);
 273    end Tree_Read;
 274
 275    ----------------
 276    -- Tree_Write --
 277    ----------------
 278
 279    procedure Tree_Write is
 280       Version_String : String := Gnat_Version_String;
 281
 282    begin
 283       Tree_Write_Int  (ASIS_Version_Number);
 284       Tree_Write_Bool (Brief_Output);
 285       Tree_Write_Bool (GNAT_Mode);
 286       Tree_Write_Char (Identifier_Character_Set);
 287       Tree_Write_Int  (Maximum_File_Name_Length);
 288       Tree_Write_Data (Suppress_Options'Address,
 289                        (Suppress_Options'Size + SU - 1) / SU);
 290       Tree_Write_Bool (Verbose_Mode);
 291       Tree_Write_Data (Warning_Mode'Address,
 292                        (Warning_Mode'Size + SU - 1) / Storage_Unit);
 293       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Config));
 294       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Explicit_Config));
 295       Tree_Write_Int  (Boolean'Pos (Assertions_Enabled_Config));
 296       Tree_Write_Bool (All_Errors_Mode);
 297       Tree_Write_Bool (Assertions_Enabled);
 298       Tree_Write_Int  (Int (Check_Policy_List));
 299       Tree_Write_Bool (Debug_Pragmas_Enabled);
 300       Tree_Write_Int  (Int (Default_Pool));
 301       Tree_Write_Bool (Enable_Overflow_Checks);
 302       Tree_Write_Bool (Full_List);
 303       Tree_Write_Int  (Int (Version_String'Length));
 304       Tree_Write_Data (Version_String'Address, Version_String'Length);
 305       Tree_Write_Data (Distribution_Stub_Mode'Address,
 306                        (Distribution_Stub_Mode'Size + SU - 1) / SU);
 307       Tree_Write_Bool (Inline_Active);
 308       Tree_Write_Bool (Inline_Processing_Required);
 309       Tree_Write_Bool (List_Units);
 310       Tree_Write_Bool (Configurable_Run_Time_Mode);
 311       Tree_Write_Data (Operating_Mode'Address,
 312                        (Operating_Mode'Size + SU - 1) / SU);
 313       Tree_Write_Bool (Suppress_Checks);
 314       Tree_Write_Bool (Try_Semantics);
 315       Tree_Write_Data (Wide_Character_Encoding_Method'Address,
 316                        (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 317       Tree_Write_Bool (Upper_Half_Encoding);
 318       Tree_Write_Bool (Force_ALI_Tree_File);
 319    end Tree_Write;
 320
 321 end Opt;