Move object literal checking into checker classes

src/ast.cc

 // 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.
 
 #include "src/ast.h"
 
 #include <cmath>  // For isfinite.
 #include "src/builtins.h"
 #include "src/code-stubs.h"
 #include "src/contexts.h"
@@ skipping 221 matching lines @@
 bool ObjectLiteral::Property::emit_store() {
   return emit_store_;
 }
 
 
 void ObjectLiteral::CalculateEmitStore(Zone* zone) {
   ZoneAllocationPolicy allocator(zone);
 
   ZoneHashMap table(Literal::Match, ZoneHashMap::kDefaultHashMapCapacity,
                     allocator);
-  bool seen_prototype = false;
   for (int i = properties()->length() - 1; i >= 0; i--) {
     ObjectLiteral::Property* property = properties()->at(i);
     if (property->is_computed_name()) continue;
     Literal* literal = property->key()->AsLiteral();
     if (literal->value()->IsNull()) continue;
     uint32_t hash = literal->Hash();
     // If the key of a computed property value is in the table, do not emit
     // a store for the property later.
     if ((property->kind() == ObjectLiteral::Property::MATERIALIZED_LITERAL ||
          property->kind() == ObjectLiteral::Property::COMPUTED) &&
         table.Lookup(literal, hash, false, allocator) != NULL) {
       property->set_emit_store(false);
-    } else if (property->kind() == ObjectLiteral::Property::PROTOTYPE) {
-      // Only emit a store for the last prototype property. Make sure we do not
-      // clobber the "__proto__" name for instance properties (using method or
-      // literal shorthand syntax).
-      property->set_emit_store(!seen_prototype);
-      seen_prototype = true;
-    } else {
+    } else if (property->kind() != ObjectLiteral::Property::PROTOTYPE) {
       // Add key to the table.
       table.Lookup(literal, hash, true, allocator);
     }
   }
 }
 
 
 bool ObjectLiteral::IsBoilerplateProperty(ObjectLiteral::Property* property) {
   return property != NULL &&
          property->kind() != ObjectLiteral::Property::PROTOTYPE;
@@ skipping 764 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 
 } }  // namespace v8::internal