1; RUN: opt < %s -loop-unroll -indvars -disable-output 2 3@b = external global i32, align 4 4 5; Function Attrs: nounwind uwtable 6define void @fn1() #0 { 7entry: 8 br label %for.cond1thread-pre-split 9 10for.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 13 14for.cond2.preheader.lr.ph: ; preds = %for.cond1thread-pre-split 15 br label %for.cond2.preheader 16 17for.cond2.preheader: ; preds = %for.inc5, %for.cond2.preheader.lr.ph 18 br label %for.cond2 19 20for.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 24 25for.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 29 30if.then: ; preds = %for.body3 31 store i32 %storemerge1, i32* @b, align 4 32 ret void 33 34for.inc5: ; preds = %for.cond2 35 br i1 undef, label %for.cond1.for.inc8_crit_edge, label %for.cond2.preheader 36 37for.cond1.for.inc8_crit_edge: ; preds = %for.inc5 38 br label %for.inc8 39 40for.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 43} 44