1  /* The return argument needs a type conversion which on some targets
       2     (e.g. s390) needs additional code.  So it is invalid to do tail
       3     call optimization here.  */
       4  
       5  /* { dg-do compile } */
       6  /* { dg-options "-O2" } */
       7  
       8  extern void abort (void);
       9  
      10  long long __attribute__((noinline))
      11  foo ()
      12  {
      13    return 3;
      14  }
      15  
      16  int __attribute__((noinline))
      17  boo ()
      18  {
      19    return foo ();
      20  }
      21  
      22  int
      23  main ()
      24  {
      25    if (boo () != 3)
      26      abort ();
      27  }
      28