[turbofan] Implement sharing of context-independent code.

src/factory.cc

 // Copyright 2014 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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1372 matching lines @@
   if (cached.code != nullptr) {
     // Caching of optimized code enabled and optimized code found.
     if (cached.literals != nullptr) result->set_literals(cached.literals);
     DCHECK(!cached.code->marked_for_deoptimization());
     DCHECK(result->shared()->is_compiled());
     result->ReplaceCode(cached.code);
   }
 
   if (cached.literals == nullptr && !info->bound()) {
     int number_of_literals = info->num_literals();
+    // TODO(mstarzinger): Consider sharing the newly created literals array.
     Handle<FixedArray> literals = NewFixedArray(number_of_literals, pretenure);
     result->set_literals(*literals);
   }
 
   return result;
 }
 
 
 Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
   Handle<FixedArray> array = NewFixedArray(length, TENURED);
@@ skipping 1026 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8