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

src/mips/full-codegen-mips.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"
 
 #if V8_TARGET_ARCH_MIPS
 
 // Note on Mips implementation:
 //
@@ skipping 1643 matching lines @@
   } else {
     FastCloneShallowObjectStub stub(isolate(), expr->properties_count());
     __ CallStub(&stub);
   }
   PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);
 
   // If result_saved is true the result is on top of the stack.  If
   // result_saved is false the result is in v0.
   bool result_saved = false;
 
-  // 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 is emitted.
-  expr->CalculateEmitStore(zone());
-
   AccessorTable accessor_table(zone());
   int property_index = 0;
   for (; property_index < expr->properties()->length(); property_index++) {
     ObjectLiteral::Property* property = expr->properties()->at(property_index);
     if (property->is_computed_name()) break;
     if (property->IsCompileTimeValue()) continue;
 
     Literal* key = property->key()->AsLiteral();
     Expression* value = property->value();
     if (!result_saved) {
@@ skipping 3785 matching lines @@
       Assembler::target_address_at(pc_immediate_load_address)) ==
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS