gcc/testsuite/gnat.dg/alignment2.adb

   1 -- { dg-do run }
   2
   3 procedure alignment2 is
   4
   5    pragma COMPONENT_ALIGNMENT(STORAGE_UNIT);
   6
   7    MAX_LIST_SIZE : constant INTEGER := 128*16;
   8
   9    LEVEL2_SIZE : constant INTEGER := 128;
  10
  11            LEVEL1_SIZE : constant INTEGER
  12               := (MAX_LIST_SIZE - 1) / LEVEL2_SIZE + 1;
  13
  14            type LEVEL2_ARRAY_TYPE is
  15               array (1..LEVEL2_SIZE) of Integer;
  16
  17            type LEVEL2_TYPE is
  18               record
  19                  NUM  : INTEGER := 0;
  20                  DATA : LEVEL2_ARRAY_TYPE := ( others => 0 );
  21               end record;
  22
  23            type LEVEL2_PTR_TYPE is access all LEVEL2_TYPE;
  24
  25            type LEVEL1_ARRAY_TYPE is
  26               array( 1..LEVEL1_SIZE ) of LEVEL2_PTR_TYPE;
  27
  28            type LEVEL1_TYPE is
  29               record
  30                  LAST_LINE  : INTEGER := 0;
  31                  LEVEL2_PTR : LEVEL1_ARRAY_TYPE;
  32               end record;
  33
  34            L1 : LEVEL1_TYPE;
  35            L2 : aliased LEVEL2_TYPE;
  36
  37    procedure q (LA : in out LEVEL1_ARRAY_TYPE) is
  38    begin
  39       LA (1) := L2'Access;
  40    end;
  41
  42 begin
  43    q (L1.LEVEL2_PTR);
  44    if L1.LEVEL2_PTR (1) /= L2'Access then
  45      raise Program_Error;
  46    end if;
  47 end;