{pu : Lean.Compiler.LCNF.Purity} →
  {motive : Lean.Compiler.LCNF.LetValue pu → Sort u} →
    (t : Lean.Compiler.LCNF.LetValue pu) →
      ((fvarId : Lean.FVarId) →
          (args : Array (Lean.Compiler.LCNF.Arg pu)) → motive (Lean.Compiler.LCNF.LetValue.fvar fvarId args)) →
        (Nat.hasNotBit 16 t.ctorIdx → motive t) → motive t