Implement basic code generation for arrow functions

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 "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/builtins.h"
@@ skipping 7244 matching lines @@
 
   // Indicates that code for this function cannot be cached.
   DECL_BOOLEAN_ACCESSORS(dont_cache)
 
   // Indicates that code for this function cannot be flushed.
   DECL_BOOLEAN_ACCESSORS(dont_flush)
 
   // Indicates that this function is a generator.
   DECL_BOOLEAN_ACCESSORS(is_generator)
 
+  // Indicates that this function is an arrow function.
+  DECL_BOOLEAN_ACCESSORS(is_arrow)
+
   // Indicates whether or not the code in the shared function support
   // deoptimization.
   inline bool has_deoptimization_support();
 
   // Enable deoptimization support through recompiled code.
   void EnableDeoptimizationSupport(Code* recompiled);
 
   // Disable (further) attempted optimization of all functions sharing this
   // shared function info.
   void DisableOptimization(BailoutReason reason);
@@ skipping 175 matching lines @@
     kHasDuplicateParameters,
     kNative,
     kInlineBuiltin,
     kBoundFunction,
     kIsAnonymous,
     kNameShouldPrintAsAnonymous,
     kIsFunction,
     kDontCache,
     kDontFlush,
     kIsGenerator,
+    kIsArrow,
     kCompilerHintsCount  // Pseudo entry
   };
 
   class DeoptCountBits: public BitField<int, 0, 4> {};
   class OptReenableTriesBits: public BitField<int, 4, 18> {};
   class ICAgeBits: public BitField<int, 22, 8> {};
 
   class OptCountBits: public BitField<int, 0, 22> {};
   class DisabledOptimizationReasonBits: public BitField<int, 22, 8> {};
 
@@ skipping 3748 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_