1 ; RUN: opt < %s -analyze -scalar-evolution 2>&1 | grep "/u 3" 2 ; XFAIL: * 3 4 ; This is a tricky testcase for unsigned wrap detection which ScalarEvolution 5 ; doesn't yet know how to do. 6 7 define i32 @f(i32 %x) nounwind readnone { 8 entry: 9 %0 = icmp ugt i32 %x, 999 ; <i1> [#uses=1] 10 br i1 %0, label %bb2, label %bb.nph 11 12 bb.nph: ; preds = %entry 13 br label %bb 14 15 bb: ; preds = %bb.nph, %bb1 16 %indvar = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2] 17 %tmp = mul i32 %indvar, 3 ; <i32> [#uses=1] 18 %x_addr.04 = add i32 %tmp, %x ; <i32> [#uses=1] 19 %1 = add i32 %x_addr.04, 3 ; <i32> [#uses=2] 20 br label %bb1 21 22 bb1: ; preds = %bb 23 %2 = icmp ugt i32 %1, 999 ; <i1> [#uses=1] 24 %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1] 25 br i1 %2, label %bb1.bb2_crit_edge, label %bb 26 27 bb1.bb2_crit_edge: ; preds = %bb1 28 %.lcssa = phi i32 [ %1, %bb1 ] ; <i32> [#uses=1] 29 br label %bb2 30 31 bb2: ; preds = %bb1.bb2_crit_edge, %entry 32 %x_addr.0.lcssa = phi i32 [ %.lcssa, %bb1.bb2_crit_edge ], [ %x, %entry ] ; <i32> [#uses=1] 33 ret i32 %x_addr.0.lcssa 34 } 35
