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      1 ; RUN: opt -jump-threading -disable-output < %s
      2 ; PR9112
      3 
      4 ; This is actually a test for value tracking. Jump threading produces
      5 ; "%phi = phi i16" when it removes all edges leading to %unreachable.
      6 ; The .ll parser won't let us write that directly since it's invalid code.
      7 
      8 define void @func() nounwind {
      9 entry:
     10   br label %bb
     11 
     12 bb:
     13   br label %bb
     14 
     15 unreachable:
     16   %phi = phi i16 [ %add, %unreachable ], [ 0, %next ]
     17   %add = add i16 0, %phi
     18   %cmp = icmp slt i16 %phi, 0
     19   br i1 %cmp, label %unreachable, label %next
     20 
     21 next:
     22   br label %unreachable
     23 }
     24 
     25