Silence compiler warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132624 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/SetTheory.h b/utils/TableGen/SetTheory.h
index c648d46..2202f22 100644
--- a/utils/TableGen/SetTheory.h
+++ b/utils/TableGen/SetTheory.h
@@ -66,6 +66,8 @@
/// Operator - A callback representing a DAG operator.
struct Operator {
+ virtual ~Operator() {}
+
/// apply - Apply this operator to Expr's arguments and insert the result
/// in Elts.
virtual void apply(SetTheory&, DagInit *Expr, RecSet &Elts) =0;
@@ -75,6 +77,8 @@
/// set into a fully expanded list of elements. Expanders provide a way for
/// users to define named sets that can be used in DAG expressions.
struct Expander {
+ virtual ~Expander() {}
+
virtual void expand(SetTheory&, Record*, RecSet &Elts) =0;
};