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/* Simple check that sibling calls are performed from a

   void non-leaf-function taking one int argument calling itself.

   Copyright (C) 2002 Free Software Foundation Inc.

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

/* { dg-do run } */

/* { dg-options "-O2 -foptimize-sibling-calls" } */

/* The option -foptimize-sibling-calls is the default, but serves as

   marker.  Self-recursion tail calls are optimized for all targets,

   regardless of presence of sibcall patterns.  */

extern void abort (void);

extern void exit (int);

extern void recurser_void (int);

extern void track (int);

int main ()

{

  recurser_void (0);

  exit (0);

}

void

recurser_void (int n)

{

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

    track (n);

  if (n == 10)

    return;

  recurser_void (n + 1);

}

void *trackpoint;

void __attribute__ ((noinline))

track (int n)

{

  char stackpos[1];

  if (n == 0)

    trackpoint = stackpos;

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

    abort ();

}