[runtime] Unify and fix the strict equality comparison.

src/objects.h

 // Copyright 2012 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1070 matching lines @@
                                            Representation representation);
 
   // Returns true if the object is of the correct type to be used as a
   // implementation of a JSObject's elements.
   inline bool HasValidElements();
 
   inline bool HasSpecificClassOf(String* name);
 
   bool BooleanValue();                                      // ECMA-262 9.2.
 
+  // ES6 section 7.2.13 Strict Equality Comparison
+  bool StrictEquals(Object* that);
+
   // Convert to a JSObject if needed.
   // native_context is used when creating wrapper object.
   static inline MaybeHandle<JSReceiver> ToObject(Isolate* isolate,
                                                  Handle<Object> object);
   static MaybeHandle<JSReceiver> ToObject(Isolate* isolate,
                                           Handle<Object> object,
                                           Handle<Context> context);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetProperty(
       LookupIterator* it, LanguageMode language_mode = SLOPPY);
@@ skipping 485 matching lines @@
 
 
 // The Simd128Value class describes heap allocated 128 bit SIMD values.
 class Simd128Value : public HeapObject {
  public:
   DECLARE_CAST(Simd128Value)
 
   DECLARE_PRINTER(Simd128Value)
   DECLARE_VERIFIER(Simd128Value)
 
+  // Equality operations.
+  inline bool Equals(Simd128Value* that);
+
   // Checks that another instance is bit-wise equal.
   bool BitwiseEquals(const Simd128Value* other) const;
   // Computes a hash from the 128 bit value, viewed as 4 32-bit integers.
   uint32_t Hash() const;
   // Copies the 16 bytes of SIMD data to the destination address.
   void CopyBits(void* destination) const;
 
   // Layout description.
   static const int kValueOffset = HeapObject::kHeaderSize;
   static const int kSize = kValueOffset + kSimd128Size;
@@ skipping 16 matching lines @@
 #define SIMD128_VALUE_CLASS(TYPE, Type, type, lane_count, lane_type) \
   class Type final : public Simd128Value {                           \
    public:                                                           \
     inline lane_type get_lane(int lane) const;                       \
     inline void set_lane(int lane, lane_type value);                 \
                                                                      \
     DECLARE_CAST(Type)                                               \
                                                                      \
     DECLARE_PRINTER(Type)                                            \
                                                                      \
+    inline bool Equals(Type* that);                                  \
+                                                                     \
    private:                                                          \
     DISALLOW_IMPLICIT_CONSTRUCTORS(Type);                            \
   };
 SIMD128_TYPES(SIMD128_VALUE_CLASS)
 #undef SIMD128_VALUE_CLASS
 
 
 enum EnsureElementsMode {
   DONT_ALLOW_DOUBLE_ELEMENTS,
   ALLOW_COPIED_DOUBLE_ELEMENTS,
@@ skipping 8605 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_