1 ; RUN: opt < %s -loop-unswitch -stats -disable-output |& grep "1 loop-unswitch - Number of branches unswitched" | count 1 2 ; PR 3170 3 define i32 @a(i32 %x, i32 %y) nounwind { 4 entry: 5 %0 = icmp ult i32 0, %y ; <i1> [#uses=1] 6 br i1 %0, label %bb.nph, label %bb4 7 8 bb.nph: ; preds = %entry 9 %1 = icmp eq i32 %x, 0 ; <i1> [#uses=1] 10 br label %bb 11 12 bb: ; preds = %bb.nph, %bb3 13 %i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=1] 14 br i1 %1, label %bb2, label %bb1 15 16 bb1: ; preds = %bb 17 %2 = tail call i32 (...)* @b() nounwind ; <i32> [#uses=0] 18 br label %bb2 19 20 bb2: ; preds = %bb, %bb1 21 %3 = add i32 %i.01, 1 ; <i32> [#uses=2] 22 br label %bb3 23 24 bb3: ; preds = %bb2 25 %i.0 = phi i32 [ %3, %bb2 ] ; <i32> [#uses=1] 26 %4 = icmp ult i32 %i.0, %y ; <i1> [#uses=1] 27 br i1 %4, label %bb, label %bb3.bb4_crit_edge 28 29 bb3.bb4_crit_edge: ; preds = %bb3 30 br label %bb4 31 32 bb4: ; preds = %bb3.bb4_crit_edge, %entry 33 ret i32 0 34 } 35 36 declare i32 @b(...) 37
