modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/930527-1.c (about)

     1  f (unsigned char x)
     2  {
     3    return (0x50 | (x >> 4)) ^ 0xff;
     4  }
     5  
     6  main ()
     7  {
     8    if (f (0) != 0xaf)
     9      abort ();
    10    exit (0);
    11  }