[strong] Fix inlining issue

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index b2ab1a058fd7264069b99f71887ae37785cb970d..667487014a66857be35bdbc40c085e6eff6b3389 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -1528,6 +1528,10 @@ 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_;
 };