diff --git a/llvm/include/llvm/CodeGen/GlobalISel/IRTranslator.h b/llvm/include/llvm/CodeGen/GlobalISel/IRTranslator.h
--- a/llvm/include/llvm/CodeGen/GlobalISel/IRTranslator.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/IRTranslator.h
@@ -194,14 +194,14 @@
   /// 3. Create the generic instruction.
   ///
   /// \return true if the translation succeeded.
-  bool translate(const Instruction &Inst);
+  virtual bool translate(const Instruction &Inst);
 
   /// Materialize \p C into virtual-register \p Reg. The generic instructions
   /// performing this materialization will be inserted into the entry block of
   /// the function.
   ///
   /// \return true if the materialization succeeded.
-  bool translate(const Constant &C, Register Reg);
+  virtual bool translate(const Constant &C, Register Reg);
 
   // Translate U as a copy of V.
   bool translateCopy(const User &U, const Value &V,