[turbofan] Introduce proper ObjectIsReceiver operator.

src/compiler/js-native-context-specialization.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/js-native-context-specialization.h"
 
 #include "src/accessors.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
@@ skipping 687 matching lines @@
                                    this_length);
     Node* branch = graph()->NewNode(common()->Branch(BranchHint::kTrue), check,
                                     this_control);
     exit_controls.push_back(graph()->NewNode(common()->IfFalse(), branch));
     this_control = graph()->NewNode(common()->IfTrue(), branch);
 
     // Compute the element access.
     Type* element_type = Type::Any();
     MachineType element_machine_type = MachineType::AnyTagged();
     if (IsFastDoubleElementsKind(elements_kind)) {
-      element_type = type_cache_.kFloat64;
+      element_type = Type::Number();
       element_machine_type = MachineType::Float64();
     } else if (IsFastSmiElementsKind(elements_kind)) {
       element_type = type_cache_.kSmi;
     }
     ElementAccess element_access = {kTaggedBase, FixedArray::kHeaderSize,
                                     element_type, element_machine_type};
 
     // Access the actual element.
     // TODO(bmeurer): Refactor this into separate methods or even a separate
     // class that deals with the elements access.
@@ skipping 305 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSNativeContextSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8