[strong] Fix inlining issue

src/arm64/lithium-arm64.h

Index: src/arm64/lithium-arm64.h
diff --git a/src/arm64/lithium-arm64.h b/src/arm64/lithium-arm64.h
index af8ef00d100e2b0de0ac43ac62f3ac0f053ee08b..7473597b151a100cf572aa18db8b95570c69c68f 100644
--- a/src/arm64/lithium-arm64.h
+++ b/src/arm64/lithium-arm64.h
@@ -737,6 +737,10 @@ class LArithmeticT final : public LTemplateInstruction<1, 3, 0> {
   void CompileToNative(LCodeGen* generator) override;
   const char* Mnemonic() const override;
 
+  DECLARE_HYDROGEN_ACCESSOR(BinaryOperation)
+
+  LanguageMode language_mode() { return hydrogen()->language_mode(); }
+
  private:
   Token::Value op_;
 };