Elements load depends on the type of the receiver.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index b5741c633bf8eaaf1f7e7f0670524b2c7aba6930..1cc0628900764d7f76d518e6e3e3967b6080429a 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -2068,14 +2068,18 @@ class HUnaryMathOperation: public HTemplateInstruction<2> {
 };
 
 
-class HLoadElements: public HUnaryOperation {
+class HLoadElements: public HTemplateInstruction<2> {
  public:
-  explicit HLoadElements(HValue* value) : HUnaryOperation(value) {
+  HLoadElements(HValue* value, HValue* typecheck) {
+    SetOperandAt(0, value);
+    SetOperandAt(1, typecheck);
     set_representation(Representation::Tagged());
     SetFlag(kUseGVN);
     SetGVNFlag(kDependsOnElementsPointer);
   }
 
+  HValue* value() { return OperandAt(0); }
+
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::Tagged();
   }