modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/align-1.c (about)

     1  typedef int new_int __attribute__ ((aligned(16)));
     2  struct S { int x; };
     3   
     4  int main()
     5  {
     6    if (sizeof(struct S) != sizeof(int))
     7      abort ();
     8    return 0;
     9  }