1; RUN: opt < %s -simplifycfg -S | FileCheck %s
2; PR9420
3
4; Note that the crash in PR9420 test is sensitive to the ordering of
5; the transformations done by SimplifyCFG, so this test is likely to rot
6; quickly.
7
8define noalias i8* @func_29() nounwind {
9; CHECK: entry:
10; CHECK-NEXT: unreachable
11entry:
12  br label %for.cond
13
14for.cond:                                         ; preds = %for.inc38, %entry
15  %p_34.addr.0 = phi i16 [ 1, %entry ], [ %conv40, %for.inc38 ]
16  br label %for.cond1
17
18for.cond1:                                        ; preds = %for.inc29, %for.cond
19  %p_32.addr.0 = phi i1 [ true, %for.cond ], [ true, %for.inc29 ]
20  br i1 %p_32.addr.0, label %for.body8, label %for.inc38
21
22for.body8:                                        ; preds = %for.cond1
23  unreachable
24
25for.inc29:                                        ; preds = %for.cond17
26  br label %for.cond1
27
28for.inc38:                                        ; preds = %for.end32
29  %conv40 = add i16 %p_34.addr.0, 1
30  br label %for.cond
31}
32