1 files changed, 49 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/sibcall-1.c b/gcc/testsuite/gcc.dg/sibcall-1.c
new file mode 100644
index 000000000..e8a95513d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/sibcall-1.c
@@ -0,0 +1,49 @@
+/* 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 ();
+}