diff --git a/mlir/include/mlir/TableGen/Constraint.h b/mlir/include/mlir/TableGen/Constraint.h
--- a/mlir/include/mlir/TableGen/Constraint.h
+++ b/mlir/include/mlir/TableGen/Constraint.h
@@ -71,6 +71,9 @@
 
   Kind getKind() const { return kind; }
 
+  /// Return the underlying def.
+  const llvm::Record &getDef() const { return *def; }
+
 protected:
   // The TableGen definition of this constraint.
   const llvm::Record *def;
diff --git a/mlir/include/mlir/TableGen/Predicate.h b/mlir/include/mlir/TableGen/Predicate.h
--- a/mlir/include/mlir/TableGen/Predicate.h
+++ b/mlir/include/mlir/TableGen/Predicate.h
@@ -67,6 +67,9 @@
     return llvm::hash_value(pred.def);
   }
 
+  /// Return the underlying def.
+  const llvm::Record &getDef() const { return *def; }
+
 protected:
   // The TableGen definition of this predicate.
   const llvm::Record *def{nullptr};