diff --git a/llvm/include/llvm/ADT/PointerUnion.h b/llvm/include/llvm/ADT/PointerUnion.h
index 7d4ed02b62262..cdbd76d7f505b 100644
--- a/llvm/include/llvm/ADT/PointerUnion.h
+++ b/llvm/include/llvm/ADT/PointerUnion.h
@@ -147,12 +147,18 @@ class PointerUnion
   //        isa<T>, cast<T> and the llvm::dyn_cast<T>
 
   /// Test if the Union currently holds the type matching T.
-  template <typename T> inline bool is() const { return isa<T>(*this); }
+  template <typename T>
+  [[deprecated("Use isa instead")]]
+  inline bool is() const {
+    return isa<T>(*this);
+  }
 
   /// Returns the value of the specified pointer type.
   ///
   /// If the specified pointer type is incorrect, assert.
-  template <typename T> inline T get() const {
+  template <typename T>
+  [[deprecated("Use cast instead")]]
+  inline T get() const {
     assert(isa<T>(*this) && "Invalid accessor called");
     return cast<T>(*this);
   }