1; REQUIRES: asserts
2; This function contains two tail calls, which should be eliminated
3; RUN: opt < %s -tailcallelim -stats -disable-output 2>&1 | grep "2 tailcallelim"
4
5define i32 @Ack(i32 %M.1, i32 %N.1) {
6entry:
7	%tmp.1 = icmp eq i32 %M.1, 0		; <i1> [#uses=1]
8	br i1 %tmp.1, label %then.0, label %endif.0
9then.0:		; preds = %entry
10	%tmp.4 = add i32 %N.1, 1		; <i32> [#uses=1]
11	ret i32 %tmp.4
12endif.0:		; preds = %entry
13	%tmp.6 = icmp eq i32 %N.1, 0		; <i1> [#uses=1]
14	br i1 %tmp.6, label %then.1, label %endif.1
15then.1:		; preds = %endif.0
16	%tmp.10 = add i32 %M.1, -1		; <i32> [#uses=1]
17	%tmp.8 = call i32 @Ack( i32 %tmp.10, i32 1 )		; <i32> [#uses=1]
18	ret i32 %tmp.8
19endif.1:		; preds = %endif.0
20	%tmp.13 = add i32 %M.1, -1		; <i32> [#uses=1]
21	%tmp.17 = add i32 %N.1, -1		; <i32> [#uses=1]
22	%tmp.14 = call i32 @Ack( i32 %M.1, i32 %tmp.17 )		; <i32> [#uses=1]
23	%tmp.11 = call i32 @Ack( i32 %tmp.13, i32 %tmp.14 )		; <i32> [#uses=1]
24	ret i32 %tmp.11
25}
26
27