Make HConstant::InstanceOf less ambiguous.

src/hydrogen-instructions.h

 // 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 2587 matching lines @@
     SetFlag(kUseGVN);
     SetFlag(kTrackSideEffectDominators);
     SetGVNFlag(kDependsOnMaps);
     SetGVNFlag(kDependsOnElementsKind);
   }
 
   void omit(CompilationInfo* info) {
     omit_ = true;
     for (int i = 0; i < map_set_.length(); i++) {
       Handle<Map> map = map_set_.at(i);
+      if (!map->CanTransition()) continue;
       map->AddDependentCompilationInfo(DependentCode::kPrototypeCheckGroup,
                                        info);
     }
   }
 
   bool omit_;
   bool has_migration_target_;
   SmallMapList map_set_;
   ZoneList<UniqueValueId> map_unique_ids_;
 };
@@ skipping 604 matching lines @@
       Factory* factory = Isolate::Current()->factory();
       // Default arguments to is_not_in_new_space depend on this heap number
       // to be tenured so that it's guaranteed not be be located in new space.
       handle_ = factory->NewNumber(double_value_, TENURED);
     }
     AllowDeferredHandleDereference smi_check;
     ASSERT(has_int32_value_ || !handle_->IsSmi());
     return handle_;
   }
 
-  bool InstanceOf(Handle<Map> map) {
+  bool HasMap(Handle<Map> map) {
     Handle<Object> constant_object = handle();
-    return constant_object->IsJSObject() &&
-        Handle<JSObject>::cast(constant_object)->map() == *map;
+    return constant_object->IsHeapObject() &&
+        Handle<HeapObject>::cast(constant_object)->map() == *map;
   }
 
   bool IsSpecialDouble() const {
     return has_double_value_ &&
         (BitCast<int64_t>(double_value_) == BitCast<int64_t>(-0.0) ||
          FixedDoubleArray::is_the_hole_nan(double_value_) ||
          std::isnan(double_value_));
   }
 
   bool NotInNewSpace() const {
@@ skipping 3542 matching lines @@
   virtual bool IsDeletable() const { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_