modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/990106-1.c (about)

     1  foo(bufp)
     2  char *bufp;
     3  {
     4      int x = 80;
     5      return (*bufp++ = x ? 'a' : 'b');
     6  }
     7  
     8  main()
     9  {
    10    char x;
    11  
    12    if (foo (&x) != 'a')
    13      abort ();
    14  
    15    exit (0);
    16  }