modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/20030707-1.c (about)

     1  /* PR c/11449.  */
     2  
     3  /* sign_bit_p() in fold-const.c failed to notice that (int) 0x80000000
     4     was the sign bit of m.  As a result, fold_single_bit_test()
     5     returned ((unsigned int) m >> 31), and that was eventually passed
     6     to invert_truthvalue(), which did not know how to handle
     7     RROTATE_EXPR, causing an ICE.  */
     8  
     9  int
    10  foo (int m)
    11  {
    12    return !(m & ((int) 0x80000000));
    13  }