1; RUN: opt < %s -loop-rotate -verify-dom-info -verify-loop-info -disable-output
2
3define void @func() {
4bb0:
5  br label %bb1
6
7bb1:                                              ; preds = %bb4, %bb0
8  %0 = phi i16 [ %2, %bb4 ], [ 0, %bb0 ]
9  %1 = icmp sle i16 %0, 2
10  br i1 %1, label %bb2, label %bb5
11
12bb2:                                              ; preds = %bb1
13  br i1 undef, label %bb6, label %bb4
14
15bb3:                                              ; No predecessors!
16  br label %bb6
17
18bb4:                                              ; preds = %bb2
19  %2 = add i16 undef, 1
20  br label %bb1
21
22bb5:                                              ; preds = %bb1
23  br label %bb6
24
25bb6:                                              ; preds = %bb5, %bb3, %bb2
26  unreachable
27}
28