[runtime] Replace the EQUALS builtin with proper Object::Equals.

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 1030 matching lines @@
   INLINE(bool IsException() const);
   INLINE(bool IsUninitialized() const);
   INLINE(bool IsTrue() const);
   INLINE(bool IsFalse() const);
   INLINE(bool IsArgumentsMarker() const);
 
   // Filler objects (fillers and free space objects).
   INLINE(bool IsFiller() const);
 
   // Extract the number.
-  inline double Number();
+  inline double Number() const;
   INLINE(bool IsNaN() const);
   INLINE(bool IsMinusZero() const);
   bool ToInt32(int32_t* value);
   bool ToUint32(uint32_t* value);
 
   inline Representation OptimalRepresentation();
 
   inline ElementsKind OptimalElementsKind();
 
   inline bool FitsRepresentation(Representation representation);
@@ skipping 14 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 7.2.12 Abstract Equality Comparison
+  MUST_USE_RESULT static Maybe<bool> Equals(Handle<Object> x, Handle<Object> y);
+
   // 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);
   MUST_USE_RESULT static MaybeHandle<JSReceiver> ToObject(
       Isolate* isolate, Handle<Object> object, Handle<Context> context);
 
@@ skipping 554 matching lines @@
  public:
   DECLARE_CAST(Simd128Value)
 
   DECLARE_PRINTER(Simd128Value)
   DECLARE_VERIFIER(Simd128Value)
 
   static Handle<String> ToString(Handle<Simd128Value> input);
 
   // Equality operations.
   inline bool Equals(Simd128Value* that);
+  static inline bool Equals(Handle<Simd128Value> one, Handle<Simd128Value> two);
 
   // 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;
@@ skipping 7425 matching lines @@
 
   // [to_number]: Cached to_number computed at startup.
   DECL_ACCESSORS(to_number, Object)
 
   // [typeof]: Cached type_of computed at startup.
   DECL_ACCESSORS(type_of, String)
 
   inline byte kind() const;
   inline void set_kind(byte kind);
 
+  // ES6 section 7.1.3 ToNumber for Boolean, Null, Undefined.
+  MUST_USE_RESULT static inline Handle<Object> ToNumber(Handle<Oddball> input);
+
   DECLARE_CAST(Oddball)
 
   // Dispatched behavior.
   DECLARE_VERIFIER(Oddball)
 
   // Initialize the fields.
   static void Initialize(Isolate* isolate, Handle<Oddball> oddball,
                          const char* to_string, Handle<Object> to_number,
                          const char* type_of, byte kind);
 
@@ skipping 1351 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_