1; RUN: opt -regions -analyze < %s | FileCheck %s
2; RUN: opt -regions -stats < %s |& FileCheck -check-prefix=STAT %s
3; RUN: opt -regions -print-region-style=bb  -analyze < %s |& FileCheck -check-prefix=BBIT %s
4; RUN: opt -regions -print-region-style=rn  -analyze < %s |& FileCheck -check-prefix=RNIT %s
5
6define void @meread_() nounwind {
7entry:
8  br label %bb23
9
10bb23:
11  br label %bb.i
12
13bb.i:                                             ; preds = %bb.i, %bb54
14  br label %pflini_.exit
15
16pflini_.exit:                                     ; preds = %bb.i
17  br label %bb58thread-split
18
19bb58thread-split:                                 ; preds = %bb64, %bb61, %pflini_.exit
20  br label %bb58
21
22bb58:                                             ; preds = %bb60, %bb58thread-split
23  br i1 1, label %bb59, label %bb23
24
25bb59:                                             ; preds = %bb58
26  switch i32 1, label %bb60 [
27    i32 1, label %l98
28  ]
29
30bb60:                                             ; preds = %bb59
31  br i1 1, label %bb61, label %bb58
32
33bb61:                                             ; preds = %bb60
34  br label %bb58thread-split
35
36l98:                                   ; preds = %bb69, %bb59
37  ret void
38}
39; CHECK-NOT: =>
40; CHECK: [0] entry => <Function Return>
41; CHECK: [1] bb23 => l98
42; STAT: 2 region - The # of regions
43; STAT: 1 region - The # of simple regions
44
45; BBIT: entry, bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61, l98,
46; BBIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61,
47
48; RNIT: entry, bb23 => l98, l98,
49; RNIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61,
50