[wasm] Avoid js-typed-lowering optimization for wasm Memory objects

src/objects.h

 // 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 9334 matching lines @@
 
   inline bool was_neutered();
   inline void set_was_neutered(bool value);
 
   inline bool is_shared();
   inline void set_is_shared(bool value);
 
   inline bool has_guard_region();
   inline void set_has_guard_region(bool value);
 
+  // TODO(gdeepti): This flag is introduced to disable asm.js optimizations in
+  // js-typer-lowering.cc, remove when the asm.js case is fixed.
+  inline bool is_wasm_buffer();
+  inline void set_is_wasm_buffer(bool value);
+
   DECLARE_CAST(JSArrayBuffer)
 
   void Neuter();
 
   V8_EXPORT_PRIVATE static void Setup(
       Handle<JSArrayBuffer> array_buffer, Isolate* isolate, bool is_external,
       void* data, size_t allocated_length,
       SharedFlag shared = SharedFlag::kNotShared);
 
   // Returns false if array buffer contents could not be allocated.
@@ skipping 22 matching lines @@
 
   // Iterates all fields in the object including internal ones except
   // kBackingStoreOffset and kBitFieldSlot.
   class BodyDescriptor;
 
   class IsExternal : public BitField<bool, 1, 1> {};
   class IsNeuterable : public BitField<bool, 2, 1> {};
   class WasNeutered : public BitField<bool, 3, 1> {};
   class IsShared : public BitField<bool, 4, 1> {};
   class HasGuardRegion : public BitField<bool, 5, 1> {};
+  class IsWasmBuffer : public BitField<bool, 6, 1> {};
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSArrayBuffer);
 };
 
 
 class JSArrayBufferView: public JSObject {
  public:
   // [buffer]: ArrayBuffer that this typed array views.
   DECL_ACCESSORS(buffer, Object)
@@ skipping 819 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_