1  /* { dg-require-effective-target return_address } */
       2  int check_fa_work (const char *, const char *) __attribute__((noinline));
       3  int check_fa_mid (const char *) __attribute__((noinline));
       4  int check_fa (char *) __attribute__((noinline));
       5  int how_much (void) __attribute__((noinline));
       6  
       7  int check_fa_work (const char *c, const char *f)
       8  {
       9    const char d = 0;
      10  
      11    if (c >= &d)
      12      return c >= f && f >= &d;
      13    else
      14      return c <= f && f <= &d;
      15  }
      16  
      17  int check_fa_mid (const char *c)
      18  {
      19    const char *f = __builtin_frame_address (0);
      20  
      21    /* Prevent a tail call to check_fa_work, eliding the current stack frame.  */
      22    return check_fa_work (c, f) != 0;
      23  }
      24  
      25  int check_fa (char *unused)
      26  {
      27    const char c = 0;
      28  
      29    /* Prevent a tail call to check_fa_mid, eliding the current stack frame.  */
      30    return check_fa_mid (&c) != 0;
      31  }
      32  
      33  int how_much (void)
      34  {
      35  	return 8;
      36  }
      37  
      38  int main (void)
      39  {
      40    char *unused = __builtin_alloca (how_much ());
      41  
      42    if (!check_fa(unused))
      43      abort();
      44    return 0;
      45  }