1 ; RUN: opt < %s -loop-rotate -verify-dom-info -verify-loop-info -disable-output 2 3 define void @func() { 4 bb0: 5 br label %bb1 6 7 bb1: ; preds = %bb4, %bb0 8 %0 = phi i16 [ %2, %bb4 ], [ 0, %bb0 ] 9 %1 = icmp sle i16 %0, 2 10 br i1 %1, label %bb2, label %bb5 11 12 bb2: ; preds = %bb1 13 br i1 undef, label %bb6, label %bb4 14 15 bb3: ; No predecessors! 16 br label %bb6 17 18 bb4: ; preds = %bb2 19 %2 = add i16 undef, 1 20 br label %bb1 21 22 bb5: ; preds = %bb1 23 br label %bb6 24 25 bb6: ; preds = %bb5, %bb3, %bb2 26 unreachable 27 } 28
