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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 ();
}
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