1 /* { dg-do compile } */
2 /* { dg-options "-O2 -fdump-tree-tailc-details" } */
3 extern void *alloca (__SIZE_TYPE__);
4 int q(int a);
5 int *v;
6 int
t(int a)7 t(int a)
8 {
9 	int r,r1;
10 	if (a)
11 		r1=r = q(a-1);
12 	else
13 		return 0;
14 	/* Dead alloca should not disturb us.  */
15 	if (r!=r1)
16 		v=alloca(r);
17 	return r;
18 }
19 /* { dg-final { scan-tree-dump-times "Found tail call" 1 "tailc"} } */
20