1; REQUIRES: asserts
2; RUN: opt < %s -passes='simple-loop-unswitch<nontrivial>' -disable-output
3
4
5; Make sure we don't crash due to a dangling use of %tmp2 in bb7.
6define void @test.use_in_dead_block(i1 %arg1, i1 %arg2) {
7bb1:
8  br label %bb2
9
10bb2:                                              ; preds = %bb4, %bb1
11  %tmp1 = phi i64 [ 0, %bb4 ], [ 42, %bb1 ]
12  br i1 %arg1, label %bb3, label %bb6
13
14bb3:                                              ; preds = %bb2
15  br i1 %arg2, label %bb5, label %bb4
16
17bb4:                                              ; preds = %bb3
18  %tmp2 = add i32 1, 1
19  br label %bb2
20
21bb5:                                             ; preds = %bb3
22  ret void
23
24bb6:                                             ; preds = %bb2
25  %tmp3 = add i64 %tmp1, 1
26  ret void
27
28bb7:                                             ; No predecessors!
29  %tmp4 = add i32 %tmp2, 1
30  ret void
31}
32