1; RUN: opt -S -loop-idiom < %s
2; Don't crash
3; PR13892
4
5target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
6target triple = "x86_64-unknown-linux-gnu"
7
8define void @test(i32* %currMB) nounwind uwtable {
9entry:
10  br i1 undef, label %start.exit, label %if.then.i
11
12if.then.i:                                        ; preds = %entry
13  unreachable
14
15start.exit:                       ; preds = %entry
16  indirectbr i8* undef, [label %0, label %for.bodyprime]
17
18; <label>:0                                       ; preds = %start.exit
19  unreachable
20
21for.bodyprime:                                    ; preds = %for.bodyprime, %start.exit
22  %i.057375 = phi i32 [ 0, %start.exit ], [ %1, %for.bodyprime ]
23  %arrayidx8prime = getelementptr inbounds i32, i32* %currMB, i32 %i.057375
24  store i32 0, i32* %arrayidx8prime, align 4
25  %1 = add i32 %i.057375, 1
26  %cmp5prime = icmp slt i32 %1, 4
27  br i1 %cmp5prime, label %for.bodyprime, label %for.endprime
28
29for.endprime:                                     ; preds = %for.bodyprime
30  br label %for.body23prime
31
32for.body23prime:                                  ; preds = %for.body23prime, %for.endprime
33  br label %for.body23prime
34}
35