gcc/testsuite/gnat.dg/pack17.adb

   1 -- { dg-do run }
   2
   3 procedure Pack17 is
   4
   5    type Bitmap_T is array (Natural range <>) of Boolean;
   6    pragma Pack (Bitmap_T);
   7
   8    type Uint8 is range 0 .. 2 ** 8 - 1;
   9    for Uint8'Size use 8;
  10
  11    type Record_With_QImode_Variants (D : Boolean) is record
  12       C_Filler : Bitmap_T (1..7);
  13       C_Map : Bitmap_T (1..3);
  14       case D is
  15          when False =>
  16             F_Bit : Boolean;
  17             F_Filler : Bitmap_T (1..7);
  18          when True =>
  19             T_Int : Uint8;
  20       end case;
  21    end record;
  22    pragma Pack (Record_With_QImode_Variants);
  23
  24    procedure Fill (R : out Record_With_QImode_Variants) is
  25    begin
  26       R.C_Filler := (True, False, True, False, True, False, True);
  27       R.C_Map := (True, False, True);
  28       R.T_Int := 17;
  29    end;
  30
  31    RT : Record_With_QImode_Variants (D => True);
  32
  33 begin
  34    Fill (RT);
  35    if RT.T_Int /= 17 then
  36      raise Program_Error;
  37    end if;
  38 end;