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/* Simple check that tail recursive call optimization is also

   controlled by -foptimize-sibling-calls.

   Copyright (C) 2006 Free Software Foundation Inc.

   Original test by Hans-Peter Nilsson  <hp@bitrange.com>  */

/* On IA64 the call frame is allocated on the register stack, not the

   normal stack.  */

/* { dg-do run { target { ! "ia64-*-*" } } } */

/* { dg-options "-O2 -fno-optimize-sibling-calls" } */

extern void abort (void);

extern void recurser_void (int);

extern void track (int);

int main (void)

{

  recurser_void (0);

  return 0;

}

void recurser_void (int n)

{

  if (n == 0 || n == 7)

    track (n);

  if (n == 10)

    return;

  recurser_void (n + 1);

}

void *trackpoint;

void track (int n)

{

  char stackpos[1];

  if (n == 0)

    trackpoint = stackpos;

  else if (n != 7 || trackpoint == stackpos)

    abort ();

}