1; RUN: opt < %s -S -loop-unroll -simplifycfg | FileCheck %s
2; PR12513: Loop unrolling breaks with indirect branches.
3; If loop unrolling attempts to transform this loop, it replaces the
4; indirectbr successors. SimplifyCFG then considers them to be unreachable.
5declare void @subtract() nounwind uwtable
6
7; CHECK-NOT: unreachable
8define i32 @main(i32 %argc, i8** nocapture %argv) nounwind uwtable {
9entry:
10  %vals19 = alloca [5 x i32], align 16
11  %x20 = alloca i32, align 4
12  store i32 135, i32* %x20, align 4
13  br label %for.body
14
15for.body:                                         ; preds = ; %call2_termjoin, %call3_termjoin
16  %indvars.iv = phi i64 [ 0, %entry ], [ %joinphi15.in.in, %call2_termjoin ]
17  %a6 = call coldcc i8* @funca(i8* blockaddress(@main, %for.body_code), i8*
18blockaddress(@main, %for.body_codeprime)) nounwind
19  indirectbr i8* %a6, [label %for.body_code, label %for.body_codeprime]
20
21for.body_code:                                    ; preds = %for.body
22  call void @subtract()
23  br label %call2_termjoin
24
25call2_termjoin:                                   ; preds = %for.body_codeprime, %for.body_code
26  %joinphi15.in.in = add i64 %indvars.iv, 1
27  %exitcond = icmp eq i64 %joinphi15.in.in, 5
28  br i1 %exitcond, label %for.end, label %for.body
29
30for.end:                                          ; preds = %call2_termjoin
31  ret i32 0
32
33for.body_codeprime:                               ; preds = %for.body
34  call void @subtract_v2(i64 %indvars.iv)
35  br label %call2_termjoin
36}
37
38declare coldcc i8* @funca(i8*, i8*) readonly
39
40declare void @subtract_v2(i64) nounwind uwtable
41