gcc-4.9/gcc/testsuite/gcc.c-torture/execute/20010904-2.c


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typedef struct x { int a; int b; } __attribute__((aligned(32))) X;
typedef struct y { X x; X y[31]; int c; } Y;

Y y[2];

int main(void)
{
  if (((char *)&y[1] - (char *)&y[0]) & 31)
    abort ();
  exit (0);
}