1  /* Check that eliminable compare-instructions are eliminated. */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2" } */
       4  /* { dg-final { scan-assembler-not "\tcmp|\ttest" } } */
       5  
       6  #ifndef t
       7  #define t short int
       8  #endif
       9  #ifndef t2
      10  #define t2 t
      11  #endif
      12  #ifndef op
      13  #define op +
      14  #endif
      15  #ifndef do_f
      16  #define do_f 1
      17  #endif
      18  #ifndef do_g
      19  #define do_g 1
      20  #endif
      21  
      22  extern void foo(void);
      23  
      24  #if do_f
      25  void f(t a, t b)
      26  {
      27    t2 c = a op b;
      28  
      29    if (c == 0)
      30      foo();
      31  }
      32  #endif
      33  
      34  #if do_g
      35  void g(t a, t b)
      36  {
      37    t2 c = a op b;
      38  
      39    if (c >= 0)
      40      foo();
      41  }
      42  #endif