gcc/testsuite/gcc.c-torture/execute/20081218-1.c

   1 struct A { int i, j; char pad[512]; } a;
   2
   3 int __attribute__((noinline))
   4 foo (void)
   5 {
   6   __builtin_memset (&a, 0x26, sizeof a);
   7   return a.i;
   8 }
   9
  10 void __attribute__((noinline))
  11 bar (void)
  12 {
  13   __builtin_memset (&a, 0x36, sizeof a);
  14   a.i = 0x36363636;
  15   a.j = 0x36373636;
  16 }
  17
  18 int
  19 main (void)
  20 {
  21   int i;
  22   if (sizeof (int) != 4 || __CHAR_BIT__ != 8)
  23     return 0;
  24
  25   if (foo () != 0x26262626)
  26     __builtin_abort ();
  27   for (i = 0; i < sizeof a; i++)
  28     if (((char *)&a)[i] != 0x26)
  29       __builtin_abort ();
  30
  31   bar ();
  32   if (a.j != 0x36373636)
  33     __builtin_abort ();
  34   a.j = 0x36363636;
  35   for (i = 0; i < sizeof a; i++)
  36     if (((char *)&a)[i] != 0x36)
  37       __builtin_abort ();
  38   return 0;
  39 }