gcc/testsuite/gcc.dg/bf-ms-layout-5.c

   1 /* PR target/52991 */
   2 /* { dg-do run { target i?86-*-* x86_64-*-* } } */
   3
   4 struct S {
   5   int a : 2;
   6   __attribute__((aligned (8))) int b : 2;
   7   int c : 28;
   8   __attribute__((aligned (16))) int d : 2;
   9   int e : 30;
  10 } __attribute__((ms_struct));
  11
  12 struct S s;
  13
  14 int
  15 main ()
  16 {
  17   int i;
  18   if (sizeof (s) != 32)
  19     __builtin_abort ();
  20   s.a = -1;
  21   for (i = 0; i < 32; ++i)
  22     if (((char *) &s)[i] != (i ? 0 : 3))
  23       __builtin_abort ();
  24   s.a = 0;
  25   s.b = -1;
  26   for (i = 0; i < 32; ++i)
  27     if (((char *) &s)[i] != (i ? 0 : 12))
  28       __builtin_abort ();
  29   s.b = 0;
  30   s.c = -1;
  31   for (i = 0; i < 32; ++i)
  32     if (((signed char *) &s)[i] != (i > 3 ? 0 : (i ? -1 : -16)))
  33       __builtin_abort ();
  34   s.c = 0;
  35   s.d = -1;
  36   for (i = 0; i < 32; ++i)
  37     if (((signed char *) &s)[i] != (i == 16 ? 3 : 0))
  38       __builtin_abort ();
  39   s.d = 0;
  40   s.e = -1;
  41   for (i = 0; i < 32; ++i)
  42     if (((signed char *) &s)[i] != ((i < 16 || i > 19) ? 0 : (i == 16 ? -4 : -1)))
  43       __builtin_abort ();
  44   return 0;
  45 }