1 ; RUN: opt < %s -scalar-evolution -analyze | grep {Loop %bb: backedge-taken count is (-1 + (-1 \\* %x) + %y)} 2 ; PR1597 3 4 define i32 @f(i32 %x, i32 %y) { 5 entry: 6 %tmp63 = icmp ult i32 %x, %y ; <i1> [#uses=1] 7 br i1 %tmp63, label %bb.preheader, label %bb8 8 9 bb.preheader: ; preds = %entry 10 br label %bb 11 12 bb: ; preds = %bb3, %bb.preheader 13 %x_addr.0 = phi i32 [ %tmp2, %bb3 ], [ %x, %bb.preheader ] ; <i32> [#uses=1] 14 %tmp2 = add i32 %x_addr.0, 1 ; <i32> [#uses=3] 15 br label %bb3 16 17 bb3: ; preds = %bb 18 %tmp6 = icmp ult i32 %tmp2, %y ; <i1> [#uses=1] 19 br i1 %tmp6, label %bb, label %bb8.loopexit 20 21 bb8.loopexit: ; preds = %bb3 22 br label %bb8 23 24 bb8: ; preds = %bb8.loopexit, %entry 25 %x_addr.1 = phi i32 [ %x, %entry ], [ %tmp2, %bb8.loopexit ] ; <i32> [#uses=1] 26 br label %return 27 28 return: ; preds = %bb8 29 ret i32 %x_addr.1 30 } 31
