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       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       Init_Or_Norm_Scalars_Config           := Init_Or_Norm_Scalars;
  60       Initialize_Scalars_Config             := Initialize_Scalars;
  61       Optimize_Alignment_Config             := Optimize_Alignment;
  62       Persistent_BSS_Mode_Config            := Persistent_BSS_Mode;
  63       Polling_Required_Config               := Polling_Required;
  64       Short_Descriptors_Config              := Short_Descriptors;
  65       Use_VADS_Size_Config                  := Use_VADS_Size;
  66
  67       --  Reset the indication that Optimize_Alignment was set locally, since
  68       --  if we had a pragma in the config file, it would set this flag True,
  69       --  but that's not a local setting.
  70
  71       Optimize_Alignment_Local := False;
  72    end Register_Opt_Config_Switches;
  73
  74    ---------------------------------
  75    -- Restore_Opt_Config_Switches --
  76    ---------------------------------
  77
  78    procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type) is
  79    begin
  80       Ada_Version                    := Save.Ada_Version;
  81       Ada_Version_Explicit           := Save.Ada_Version_Explicit;
  82       Assertions_Enabled             := Save.Assertions_Enabled;
  83       Assume_No_Invalid_Values       := Save.Assume_No_Invalid_Values;
  84       Check_Policy_List              := Save.Check_Policy_List;
  85       Debug_Pragmas_Enabled          := Save.Debug_Pragmas_Enabled;
  86       Dynamic_Elaboration_Checks     := Save.Dynamic_Elaboration_Checks;
  87       Exception_Locations_Suppressed := Save.Exception_Locations_Suppressed;
  88       Extensions_Allowed             := Save.Extensions_Allowed;
  89       External_Name_Exp_Casing       := Save.External_Name_Exp_Casing;
  90       External_Name_Imp_Casing       := Save.External_Name_Imp_Casing;
  91       Fast_Math                      := Save.Fast_Math;
  92       Init_Or_Norm_Scalars           := Save.Init_Or_Norm_Scalars;
  93       Initialize_Scalars             := Save.Initialize_Scalars;
  94       Optimize_Alignment             := Save.Optimize_Alignment;
  95       Optimize_Alignment_Local       := Save.Optimize_Alignment_Local;
  96       Persistent_BSS_Mode            := Save.Persistent_BSS_Mode;
  97       Polling_Required               := Save.Polling_Required;
  98       Short_Descriptors              := Save.Short_Descriptors;
  99       Use_VADS_Size                  := Save.Use_VADS_Size;
 100    end Restore_Opt_Config_Switches;
 101
 102    ------------------------------
 103    -- Save_Opt_Config_Switches --
 104    ------------------------------
 105
 106    procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type) is
 107    begin
 108       Save.Ada_Version                    := Ada_Version;
 109       Save.Ada_Version_Explicit           := Ada_Version_Explicit;
 110       Save.Assertions_Enabled             := Assertions_Enabled;
 111       Save.Assume_No_Invalid_Values       := Assume_No_Invalid_Values;
 112       Save.Check_Policy_List              := Check_Policy_List;
 113       Save.Debug_Pragmas_Enabled          := Debug_Pragmas_Enabled;
 114       Save.Dynamic_Elaboration_Checks     := Dynamic_Elaboration_Checks;
 115       Save.Exception_Locations_Suppressed := Exception_Locations_Suppressed;
 116       Save.Extensions_Allowed             := Extensions_Allowed;
 117       Save.External_Name_Exp_Casing       := External_Name_Exp_Casing;
 118       Save.External_Name_Imp_Casing       := External_Name_Imp_Casing;
 119       Save.Fast_Math                      := Fast_Math;
 120       Save.Init_Or_Norm_Scalars           := Init_Or_Norm_Scalars;
 121       Save.Initialize_Scalars             := Initialize_Scalars;
 122       Save.Optimize_Alignment             := Optimize_Alignment;
 123       Save.Optimize_Alignment_Local       := Optimize_Alignment_Local;
 124       Save.Persistent_BSS_Mode            := Persistent_BSS_Mode;
 125       Save.Polling_Required               := Polling_Required;
 126       Save.Short_Descriptors              := Short_Descriptors;
 127       Save.Use_VADS_Size                  := Use_VADS_Size;
 128    end Save_Opt_Config_Switches;
 129
 130    -----------------------------
 131    -- Set_Opt_Config_Switches --
 132    -----------------------------
 133
 134    procedure Set_Opt_Config_Switches
 135      (Internal_Unit : Boolean;
 136       Main_Unit     : Boolean)
 137    is
 138    begin
 139       --  Case of internal unit
 140
 141       if Internal_Unit then
 142
 143          --  Set standard switches. Note we do NOT set Ada_Version_Explicit
 144          --  since the whole point of this is that it still properly indicates
 145          --  the configuration setting even in a run time unit.
 146
 147          Ada_Version                 := Ada_Version_Runtime;
 148          Dynamic_Elaboration_Checks  := False;
 149          Extensions_Allowed          := True;
 150          External_Name_Exp_Casing    := As_Is;
 151          External_Name_Imp_Casing    := Lowercase;
 152          Optimize_Alignment          := 'O';
 153          Persistent_BSS_Mode         := False;
 154          Use_VADS_Size               := False;
 155          Optimize_Alignment_Local    := True;
 156
 157          --  For an internal unit, assertions/debug pragmas are off unless this
 158          --  is the main unit and they were explicitly enabled. We also make
 159          --  sure we do not assume that values are necessarily valid.
 160
 161          if Main_Unit then
 162             Assertions_Enabled       := Assertions_Enabled_Config;
 163             Assume_No_Invalid_Values := Assume_No_Invalid_Values_Config;
 164             Debug_Pragmas_Enabled    := Debug_Pragmas_Enabled_Config;
 165             Check_Policy_List        := Check_Policy_List_Config;
 166          else
 167             Assertions_Enabled       := False;
 168             Assume_No_Invalid_Values := False;
 169             Debug_Pragmas_Enabled    := False;
 170             Check_Policy_List        := Empty;
 171          end if;
 172
 173       --  Case of non-internal unit
 174
 175       else
 176          Ada_Version                 := Ada_Version_Config;
 177          Ada_Version_Explicit        := Ada_Version_Explicit_Config;
 178          Assertions_Enabled          := Assertions_Enabled_Config;
 179          Assume_No_Invalid_Values    := Assume_No_Invalid_Values_Config;
 180          Check_Policy_List           := Check_Policy_List_Config;
 181          Debug_Pragmas_Enabled       := Debug_Pragmas_Enabled_Config;
 182          Dynamic_Elaboration_Checks  := Dynamic_Elaboration_Checks_Config;
 183          Extensions_Allowed          := Extensions_Allowed_Config;
 184          External_Name_Exp_Casing    := External_Name_Exp_Casing_Config;
 185          External_Name_Imp_Casing    := External_Name_Imp_Casing_Config;
 186          Fast_Math                   := Fast_Math_Config;
 187          Init_Or_Norm_Scalars        := Init_Or_Norm_Scalars_Config;
 188          Initialize_Scalars          := Initialize_Scalars_Config;
 189          Optimize_Alignment          := Optimize_Alignment_Config;
 190          Optimize_Alignment_Local    := False;
 191          Persistent_BSS_Mode         := Persistent_BSS_Mode_Config;
 192          Use_VADS_Size               := Use_VADS_Size_Config;
 193       end if;
 194
 195       Exception_Locations_Suppressed := Exception_Locations_Suppressed_Config;
 196       Fast_Math                      := Fast_Math_Config;
 197       Optimize_Alignment             := Optimize_Alignment_Config;
 198       Polling_Required               := Polling_Required_Config;
 199       Short_Descriptors              := Short_Descriptors_Config;
 200    end Set_Opt_Config_Switches;
 201
 202    ---------------
 203    -- Tree_Read --
 204    ---------------
 205
 206    procedure Tree_Read is
 207       Tree_Version_String_Len         : Nat;
 208       Ada_Version_Config_Val          : Nat;
 209       Ada_Version_Explicit_Config_Val : Nat;
 210       Assertions_Enabled_Config_Val   : Nat;
 211
 212    begin
 213       Tree_Read_Int  (Tree_ASIS_Version_Number);
 214       Tree_Read_Bool (Brief_Output);
 215       Tree_Read_Bool (GNAT_Mode);
 216       Tree_Read_Char (Identifier_Character_Set);
 217       Tree_Read_Int  (Maximum_File_Name_Length);
 218       Tree_Read_Data (Suppress_Options'Address,
 219                       (Suppress_Options'Size + SU - 1) / SU);
 220       Tree_Read_Bool (Verbose_Mode);
 221       Tree_Read_Data (Warning_Mode'Address,
 222                       (Warning_Mode'Size + SU - 1) / SU);
 223       Tree_Read_Int  (Ada_Version_Config_Val);
 224       Tree_Read_Int  (Ada_Version_Explicit_Config_Val);
 225       Tree_Read_Int  (Assertions_Enabled_Config_Val);
 226       Tree_Read_Bool (All_Errors_Mode);
 227       Tree_Read_Bool (Assertions_Enabled);
 228       Tree_Read_Int  (Int (Check_Policy_List));
 229       Tree_Read_Bool (Debug_Pragmas_Enabled);
 230       Tree_Read_Bool (Enable_Overflow_Checks);
 231       Tree_Read_Bool (Full_List);
 232
 233       Ada_Version_Config :=
 234         Ada_Version_Type'Val (Ada_Version_Config_Val);
 235       Ada_Version_Explicit_Config :=
 236         Ada_Version_Type'Val (Ada_Version_Explicit_Config_Val);
 237       Assertions_Enabled_Config :=
 238         Boolean'Val (Assertions_Enabled_Config_Val);
 239
 240       --  Read version string: we have to get the length first
 241
 242       Tree_Read_Int (Tree_Version_String_Len);
 243
 244       declare
 245          Tmp : String (1 .. Integer (Tree_Version_String_Len));
 246       begin
 247          Tree_Read_Data
 248            (Tmp'Address, Tree_Version_String_Len);
 249          System.Strings.Free (Tree_Version_String);
 250          Free (Tree_Version_String);
 251          Tree_Version_String := new String'(Tmp);
 252       end;
 253
 254       Tree_Read_Data (Distribution_Stub_Mode'Address,
 255                       (Distribution_Stub_Mode'Size + SU - 1) / Storage_Unit);
 256       Tree_Read_Bool (Inline_Active);
 257       Tree_Read_Bool (Inline_Processing_Required);
 258       Tree_Read_Bool (List_Units);
 259       Tree_Read_Bool (Configurable_Run_Time_Mode);
 260       Tree_Read_Data (Operating_Mode'Address,
 261                       (Operating_Mode'Size + SU - 1) / Storage_Unit);
 262       Tree_Read_Bool (Suppress_Checks);
 263       Tree_Read_Bool (Try_Semantics);
 264       Tree_Read_Data (Wide_Character_Encoding_Method'Address,
 265                       (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 266       Tree_Read_Bool (Upper_Half_Encoding);
 267       Tree_Read_Bool (Force_ALI_Tree_File);
 268    end Tree_Read;
 269
 270    ----------------
 271    -- Tree_Write --
 272    ----------------
 273
 274    procedure Tree_Write is
 275       Version_String : String := Gnat_Version_String;
 276
 277    begin
 278       Tree_Write_Int  (ASIS_Version_Number);
 279       Tree_Write_Bool (Brief_Output);
 280       Tree_Write_Bool (GNAT_Mode);
 281       Tree_Write_Char (Identifier_Character_Set);
 282       Tree_Write_Int  (Maximum_File_Name_Length);
 283       Tree_Write_Data (Suppress_Options'Address,
 284                        (Suppress_Options'Size + SU - 1) / SU);
 285       Tree_Write_Bool (Verbose_Mode);
 286       Tree_Write_Data (Warning_Mode'Address,
 287                        (Warning_Mode'Size + SU - 1) / Storage_Unit);
 288       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Config));
 289       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Explicit_Config));
 290       Tree_Write_Int  (Boolean'Pos (Assertions_Enabled_Config));
 291       Tree_Write_Bool (All_Errors_Mode);
 292       Tree_Write_Bool (Assertions_Enabled);
 293       Tree_Write_Int  (Int (Check_Policy_List));
 294       Tree_Write_Bool (Debug_Pragmas_Enabled);
 295       Tree_Write_Bool (Enable_Overflow_Checks);
 296       Tree_Write_Bool (Full_List);
 297       Tree_Write_Int  (Int (Version_String'Length));
 298       Tree_Write_Data (Version_String'Address, Version_String'Length);
 299       Tree_Write_Data (Distribution_Stub_Mode'Address,
 300                        (Distribution_Stub_Mode'Size + SU - 1) / SU);
 301       Tree_Write_Bool (Inline_Active);
 302       Tree_Write_Bool (Inline_Processing_Required);
 303       Tree_Write_Bool (List_Units);
 304       Tree_Write_Bool (Configurable_Run_Time_Mode);
 305       Tree_Write_Data (Operating_Mode'Address,
 306                        (Operating_Mode'Size + SU - 1) / SU);
 307       Tree_Write_Bool (Suppress_Checks);
 308       Tree_Write_Bool (Try_Semantics);
 309       Tree_Write_Data (Wide_Character_Encoding_Method'Address,
 310                        (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 311       Tree_Write_Bool (Upper_Half_Encoding);
 312       Tree_Write_Bool (Force_ALI_Tree_File);
 313    end Tree_Write;
 314
 315 end Opt;