[ic] Smi-handlers are now able to represent loads of constants from descriptor array.

src/ic/ic.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/ic/ic.h"
 
 #include "src/accessors.h"
 #include "src/api-arguments-inl.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 1192 matching lines @@
             SimpleFieldLoadFromPrototype(field, map, holder);
         if (!handler.is_null()) {
           return handler;
         }
         break;  // Custom-compiled handler.
       }
 
       // -------------- Constant properties --------------
       DCHECK(lookup->property_details().type() == DATA_CONSTANT);
       if (receiver_is_holder) {
+        if (FLAG_tf_load_ic_stub) {
+          TRACE_HANDLER_STATS(isolate(), LoadIC_LoadConstantDH);
+          return SmiHandler::MakeLoadConstantHandler(
+              isolate(), lookup->GetConstantIndex());
+        }
         TRACE_HANDLER_STATS(isolate(), LoadIC_LoadConstantStub);
         LoadConstantStub stub(isolate(), lookup->GetConstantIndex());
         return stub.GetCode();
       }
       break;  // Custom-compiled handler.
     }
 
     case LookupIterator::INTEGER_INDEXED_EXOTIC:
       TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub);
       return slow_stub();
@@ skipping 1738 matching lines @@
     DCHECK_EQ(LookupIterator::INTERCEPTOR, it.state());
     it.Next();
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
                                        Object::GetProperty(&it));
   }
 
   return *result;
 }
 }  // namespace internal
 }  // namespace v8