modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/compile/990203-1.c (about)

     1  int
     2  f (f)
     3       float f;
     4  {
     5    long long  *ip = (long long  *) &f;
     6    return (*ip & 0x7ff0000000000000LL ) != 0x7ff0000000000000LL ;
     7  }