Move work to omit unnecessary ObjectLiteral stores to the numbering pass.

src/ast-numbering.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/v8.h"
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/scopes.h"
 
@@ skipping 414 matching lines @@
   }
 }
 
 
 void AstNumberingVisitor::VisitObjectLiteral(ObjectLiteral* node) {
   IncrementNodeCount();
   node->set_base_id(ReserveIdRange(node->num_ids()));
   for (int i = 0; i < node->properties()->length(); i++) {
     VisitObjectLiteralProperty(node->properties()->at(i));
   }
+  // Mark all computed expressions that are bound to a key that
+  // is shadowed by a later occurrence of the same key. For the
+  // marked expressions, no store code will be is emitted.
+  node->CalculateEmitStore(zone());
 }
 
 
 void AstNumberingVisitor::VisitObjectLiteralProperty(
     ObjectLiteralProperty* node) {
   if (node->is_computed_name()) DisableOptimization(kComputedPropertyName);
   Visit(node->key());
   Visit(node->value());
 }
 
@@ skipping 87 matching lines @@
 }
 
 
 bool AstNumbering::Renumber(Isolate* isolate, Zone* zone,
                             FunctionLiteral* function) {
   AstNumberingVisitor visitor(isolate, zone);
   return visitor.Renumber(function);
 }
 }
 }  // namespace v8::internal