1  /* PR c/46921  lost side effect when struct initializer expr uses comma
       2        operator  */
       3  
       4  /* { dg-do run } */
       5  /* { dg-options "" } */
       6  
       7  extern int printf(const char *, ...);
       8  extern void abort (void);
       9  
      10  typedef struct __uws_0 { } uw_unit;
      11  uw_unit uw_unit_v = {};
      12  
      13  struct __uws_1 
      14  {
      15    struct __uws_0 __uwf_1;
      16    struct __uws_1* __uwf_2;
      17  };
      18  
      19  static int left_hand_eval = 0;
      20  
      21  static void
      22  foo (const char *s)
      23  {
      24    ++left_hand_eval;
      25    printf("%s", s);
      26  }
      27  
      28  int
      29  main ()
      30  {
      31    struct __uws_1 tmp = {(foo("Inner\n"), uw_unit_v)};
      32    
      33    printf("Outer\n");
      34    /* left hand expression in comma operator initializer must always be
      35       evaluated if there are side effects.  */
      36    if (!left_hand_eval)
      37      abort ();
      38    
      39    return 0;
      40  }