1 ; REQUIRES: asserts 2 ; RUN: opt < %s -loop-unswitch -stats -disable-output 2>&1 | grep "1 loop-unswitch - Number of branches unswitched" | count 1 3 ; PR 3170 4 define i32 @a(i32 %x, i32 %y) nounwind { 5 entry: 6 %0 = icmp ult i32 0, %y ; <i1> [#uses=1] 7 br i1 %0, label %bb.nph, label %bb4 8 9 bb.nph: ; preds = %entry 10 %1 = icmp eq i32 %x, 0 ; <i1> [#uses=1] 11 br label %bb 12 13 bb: ; preds = %bb.nph, %bb3 14 %i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=1] 15 br i1 %1, label %bb2, label %bb1 16 17 bb1: ; preds = %bb 18 %2 = tail call i32 (...)* @b() nounwind ; <i32> [#uses=0] 19 br label %bb2 20 21 bb2: ; preds = %bb, %bb1 22 %3 = add i32 %i.01, 1 ; <i32> [#uses=2] 23 br label %bb3 24 25 bb3: ; preds = %bb2 26 %i.0 = phi i32 [ %3, %bb2 ] ; <i32> [#uses=1] 27 %4 = icmp ult i32 %i.0, %y ; <i1> [#uses=1] 28 br i1 %4, label %bb, label %bb3.bb4_crit_edge 29 30 bb3.bb4_crit_edge: ; preds = %bb3 31 br label %bb4 32 33 bb4: ; preds = %bb3.bb4_crit_edge, %entry 34 ret i32 0 35 } 36 37 declare i32 @b(...) 38
