1  /* PR ipa/81128 */
       2  /* { dg-do run } */
       3  /* { dg-options "-O3" } */
       4  /* { dg-require-ifunc "" } */
       5  
       6  
       7  #include <stdio.h>
       8  #include <stdlib.h>
       9  #include <time.h>
      10  
      11  int resolver_fn = 0;
      12  int resolved_fn = 0;
      13  
      14  static inline void
      15  do_it_right_at_runtime_A ()
      16  {
      17    resolved_fn++;
      18  }
      19  
      20  static inline void
      21  do_it_right_at_runtime_B ()
      22  {
      23    resolved_fn++;
      24  }
      25  
      26  static inline void do_it_right_at_runtime (void);
      27  
      28  void do_it_right_at_runtime (void)
      29    __attribute__ ((ifunc ("resolve_do_it_right_at_runtime")));
      30  
      31  static void (*resolve_do_it_right_at_runtime (void)) (void)
      32  {
      33    srand (time (NULL));
      34    int r = rand ();
      35    resolver_fn++;
      36  
      37    /* Use intermediate variable to get a warning for non-matching
      38     * prototype. */
      39    typeof(do_it_right_at_runtime) *func;
      40    if (r & 1)
      41      func = do_it_right_at_runtime_A;
      42    else
      43      func = do_it_right_at_runtime_B;
      44  
      45    return (void *) func;
      46  }
      47  
      48  int
      49  main (void)
      50  {
      51    const unsigned int ITERS = 10;
      52  
      53    for (int i = ITERS; i > 0; i--)
      54      {
      55        do_it_right_at_runtime ();
      56      }
      57  
      58    if (resolver_fn != 1)
      59      __builtin_abort ();
      60  
      61    if (resolved_fn != 10)
      62      __builtin_abort ();
      63  
      64    return 0;
      65  }