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

     1  unsigned
     2  good (unsigned src, unsigned o5, unsigned w5)
     3  {
     4    return src & ~((w5 == 0) ? (~0 << o5) : (1 << o5));
     5  }
     6  
     7  unsigned
     8  bad (unsigned src, unsigned o5, unsigned w5)
     9  {
    10    return src & ((w5 == 0) ? ~(~0 << o5) : ~(1 << o5));
    11  }
    12