modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/930217-1.c (about)

     1  /* The bit-field below would have a problem if __INT_MAX__ is too
     2     small.  */
     3  #if __INT_MAX__ < 2147483647
     4  int a;
     5  #else
     6  double g ();
     7  typedef union {
     8    struct {
     9      unsigned s:1, e:8, f:23;
    10    } u;
    11    float f;
    12  } s;
    13  
    14  f(x, n)
    15       float x;
    16  {
    17    ((s *)&x)->u.e -= n;
    18    x = g((double)x, -n);
    19  }
    20  #endif