Don't explicitly pass the Smi-representation to IfCompare.

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1110 matching lines @@
 
 HValue* HGraphBuilder::BuildCheckForCapacityGrow(HValue* object,
                                                  HValue* elements,
                                                  ElementsKind kind,
                                                  HValue* length,
                                                  HValue* key,
                                                  bool is_js_array) {
   Zone* zone = this->zone();
   IfBuilder length_checker(this);
 
-  length_checker.IfCompare(length, key, Token::EQ, Representation::Smi());
+  length_checker.IfCompare(length, key, Token::EQ);
   length_checker.Then();
 
   HValue* current_capacity =
       AddInstruction(new(zone) HFixedArrayBaseLength(elements));
 
   IfBuilder capacity_checker(this);
 
-  capacity_checker.IfCompare(
-      length, current_capacity, Token::EQ, Representation::Smi());
+  capacity_checker.IfCompare(length, current_capacity, Token::EQ);
   capacity_checker.Then();
 
   HValue* context = environment()->LookupContext();
 
   HValue* new_capacity =
       BuildNewElementsCapacity(context, current_capacity);
 
   HValue* new_elements = BuildGrowElementsCapacity(object, elements,
                                                    kind, length,
                                                    new_capacity);
@@ skipping 101 matching lines @@
     length = AddInstruction(new(zone) HFixedArrayBaseLength(elements));
   }
   HValue* checked_key = NULL;
   if (IsExternalArrayElementsKind(elements_kind)) {
     if (store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS) {
       NoObservableSideEffectsScope no_effects(this);
       HLoadExternalArrayPointer* external_elements =
           new(zone) HLoadExternalArrayPointer(elements);
       AddInstruction(external_elements);
       IfBuilder length_checker(this);
-      length_checker.IfCompare(key, length, Token::LT, Representation::Smi());
+      length_checker.IfCompare(key, length, Token::LT);
       length_checker.Then();
       IfBuilder negative_checker(this);
       HValue* bounds_check = negative_checker.IfCompare(
-          key, graph()->GetConstant0(), Token::GTE, Representation::Smi());
+          key, graph()->GetConstant0(), Token::GTE);
       negative_checker.Then();
       HInstruction* result = BuildExternalArrayElementAccess(
           external_elements, key, val, bounds_check,
           elements_kind, is_store);
       AddInstruction(result);
       negative_checker.ElseDeopt();
       length_checker.End();
       return result;
     } else {
       ASSERT(store_mode == STANDARD_STORE);
@@ skipping 10238 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal