1; REQUIRES: asserts
2; RUN: opt < %s -loop-unswitch -stats -disable-output 2>&1 | grep "1 loop-unswitch - Number of branches unswitched" | count 1
3; PR 3170
4define i32 @a(i32 %x, i32 %y) nounwind {
5entry:
6	%0 = icmp ult i32 0, %y		; <i1> [#uses=1]
7	br i1 %0, label %bb.nph, label %bb4
8
9bb.nph:		; preds = %entry
10	%1 = icmp eq i32 %x, 0		; <i1> [#uses=1]
11	br label %bb
12
13bb:		; preds = %bb.nph, %bb3
14	%i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ]		; <i32> [#uses=1]
15	br i1 %1, label %bb2, label %bb1
16
17bb1:		; preds = %bb
18	%2 = tail call i32 (...)* @b() nounwind		; <i32> [#uses=0]
19	br label %bb2
20
21bb2:		; preds = %bb, %bb1
22	%3 = add i32 %i.01, 1		; <i32> [#uses=2]
23	br label %bb3
24
25bb3:		; preds = %bb2
26	%i.0 = phi i32 [ %3, %bb2 ]		; <i32> [#uses=1]
27	%4 = icmp ult i32 %i.0, %y		; <i1> [#uses=1]
28	br i1 %4, label %bb, label %bb3.bb4_crit_edge
29
30bb3.bb4_crit_edge:		; preds = %bb3
31	br label %bb4
32
33bb4:		; preds = %bb3.bb4_crit_edge, %entry
34	ret i32 0
35}
36
37declare i32 @b(...)
38