modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/alias-3.c (about)

     1  /* { dg-require-alias "" } */
     2  static int a=0;
     3  extern int b __attribute__ ((alias("a")));
     4  __attribute__ ((noinline))
     5  static inc()
     6  {
     7    b++;
     8  }
     9  int
    10  main()
    11  {
    12    a=0;
    13    inc ();
    14    if (a!=1)
    15      __builtin_abort ();
    16    return 0;
    17  }