1 ; RUN: opt < %s -loop-unroll -indvars -disable-output
3 @b = external global i32, align 4
5 ; Function Attrs: nounwind uwtable
6 define void @fn1() #0 {
8 br label %for.cond1thread-pre-split
10 for.cond1thread-pre-split: ; preds = %for.inc8, %entry
11 %storemerge1 = phi i32 [ 0, %entry ], [ %inc9, %for.inc8 ]
12 br i1 undef, label %for.inc8, label %for.cond2.preheader.lr.ph
14 for.cond2.preheader.lr.ph: ; preds = %for.cond1thread-pre-split
15 br label %for.cond2.preheader
17 for.cond2.preheader: ; preds = %for.inc5, %for.cond2.preheader.lr.ph
20 for.cond2: ; preds = %for.body3, %for.cond2.preheader
21 %storemerge = phi i32 [ %add, %for.body3 ], [ 0, %for.cond2.preheader ]
22 %cmp = icmp slt i32 %storemerge, 1
23 br i1 %cmp, label %for.body3, label %for.inc5
25 for.body3: ; preds = %for.cond2
26 %tobool4 = icmp eq i32 %storemerge, 0
27 %add = add nsw i32 %storemerge, 1
28 br i1 %tobool4, label %for.cond2, label %if.then
30 if.then: ; preds = %for.body3
31 store i32 %storemerge1, i32* @b, align 4
34 for.inc5: ; preds = %for.cond2
35 br i1 undef, label %for.cond1.for.inc8_crit_edge, label %for.cond2.preheader
37 for.cond1.for.inc8_crit_edge: ; preds = %for.inc5
40 for.inc8: ; preds = %for.cond1.for.inc8_crit_edge, %for.cond1thread-pre-split
41 %inc9 = add nsw i32 %storemerge1, 1
42 br label %for.cond1thread-pre-split