[strong] Disallow implicit conversions for comparison

src/x87/lithium-x87.h

Index: src/x87/lithium-x87.h
diff --git a/src/x87/lithium-x87.h b/src/x87/lithium-x87.h
index 1422f65adecd3ef6e27b2549b8ac27df11da2e01..7251fda0f5f9788b0c6178bacd50560dbd927761 100644
--- a/src/x87/lithium-x87.h
+++ b/src/x87/lithium-x87.h
@@ -1202,6 +1202,8 @@ class LCmpT final : public LTemplateInstruction<1, 3, 0> {
   DECLARE_CONCRETE_INSTRUCTION(CmpT, "cmp-t")
   DECLARE_HYDROGEN_ACCESSOR(CompareGeneric)
 
+  LanguageMode language_mode() { return hydrogen()->language_mode(); }
+
   LOperand* context() { return inputs_[0]; }
   Token::Value op() const { return hydrogen()->token(); }
 };