gcc/testsuite/gcc.c-torture/execute/20020619-1.c

   1 static int ref(void)
   2 {
   3   union {
   4     char c[5];
   5     int i;
   6   } u;
   7
   8   __builtin_memset (&u, 0, sizeof(u));
   9   u.c[0] = 1;
  10   u.c[1] = 2;
  11   u.c[2] = 3;
  12   u.c[3] = 4;
  13
  14   return u.i;
  15 }
  16
  17 #define MAX(a,b)  (a < b ? b : a)
  18
  19 static int test(void)
  20 {
  21   char c[MAX(5, sizeof(int))] __attribute__((aligned)) = { 1, 2, 3, 4 };
  22   return *(int *)c;
  23 }
  24
  25 int main()
  26 {
  27   int a = test();
  28   int b = ref();
  29   if (a != b)
  30     abort ();
  31   return 0;
  32 }