1 /* { dg-do compile } */
2 /* { dg-options "-O1 -foptimize-sibling-calls -fdump-tree-tailr1-details" } */
3 int
t(int a)4 t(int a)
5 {
6 	int r;
7 	if (a)
8 		r = t(a-1);
9 	else
10 		return 0;
11 	if (r)
12 		r=r;
13 	return r;
14 }
15 /* { dg-final { scan-tree-dump-times "Eliminated tail recursion" 1 "tailr1"} } */
16