1  double gl;
       2  
       3  #define test(N, CMP) \
       4    void   N ## _dead(double a) { if (a CMP 0.0) gl = 1; } \
       5    double N ## _live(double a) { if (a CMP 0.0) gl = 1; return a; }
       6  
       7  test(eq, ==)
       8  test(ne, !=)
       9  test(ge, >=)
      10  test(gt, >)
      11  test(le, <=)
      12  test(lt, <)