1  /* { dg-do compile { target trampolines } } */
       2  /* { dg-options "-O2 -fdump-tree-tailc-details" } */
       3  
       4  struct s { int x; };
       5  struct s f (int);
       6  struct s global;
       7  void callit (void (*) (void));
       8  
       9  /* Tail call.  */
      10  void
      11  g1 (void)
      12  {
      13    f (1);
      14  }
      15  
      16  /* Not a tail call.  */
      17  void
      18  g2 (void)
      19  {
      20    global = f (2);
      21  }
      22  
      23  /* Not a tail call.  */
      24  void
      25  g3 (struct s *ptr)
      26  {
      27    *ptr = f (3);
      28  }
      29  
      30  /* Tail call.  */
      31  struct s
      32  g4 (struct s param)
      33  {
      34    param = f (4);
      35    return param;
      36  }
      37  
      38  /* Tail call.  */
      39  struct s
      40  g5 (void)
      41  {
      42    struct s local = f (5);
      43    return local;
      44  }
      45  
      46  /* Tail call.  */
      47  struct s
      48  g6 (void)
      49  {
      50    return f (6);
      51  }
      52  
      53  /* Not a tail call.  */
      54  struct s
      55  g7 (void)
      56  {
      57    struct s local = f (7);
      58    global = local;
      59    return local;
      60  }
      61  
      62  /* Not a tail call.  */
      63  struct s
      64  g8 (struct s *ptr)
      65  {
      66    struct s local = f (8);
      67    *ptr = local;
      68    return local;
      69  }
      70  
      71  /* Not a tail call.  */
      72  int
      73  g9 (struct s param)
      74  {
      75    void inner (void) { param = f (9); }
      76    callit (inner);
      77    return 9;
      78  }
      79  
      80  /* Tail call.  */
      81  int
      82  g10 (int param)
      83  {
      84    void inner (void) { f (param); }
      85    callit (inner);
      86    return 10;
      87  }
      88  
      89  /* { dg-final { scan-tree-dump-times "Found tail call" 5 "tailc" } } */