Remove fields from Isolate in Product mode

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 7769 matching lines @@
   result.set_owner(owner);
   result.set_token_pos(token_pos);
   result.set_has_initializer(false);
   result.set_is_unboxing_candidate(true);
   result.set_kernel_offset(0);
   Isolate* isolate = Isolate::Current();
 
   // Use field guards if they are enabled and the isolate has never reloaded.
   // TODO(johnmccutchan): The reload case assumes the worst case (everything is
   // dynamic and possibly null). Attempt to relax this later.
+#if defined(PRODUCT)
+  const bool use_guarded_cid =
+      FLAG_precompiled_mode || isolate->use_field_guards();
+#else
   const bool use_guarded_cid =
       FLAG_precompiled_mode ||
       (isolate->use_field_guards() && !isolate->HasAttemptedReload());
+#endif  // !defined(PRODUCT)
   result.set_guarded_cid(use_guarded_cid ? kIllegalCid : kDynamicCid);
   result.set_is_nullable(use_guarded_cid ? false : true);
   result.set_guarded_list_length_in_object_offset(Field::kUnknownLengthOffset);
   // Presently, we only attempt to remember the list length for final fields.
   if (is_final && use_guarded_cid) {
     result.set_guarded_list_length(Field::kUnknownFixedLength);
   } else {
     result.set_guarded_list_length(Field::kNoFixedLength);
   }
 }
@@ skipping 3222 matching lines @@
 }
 
 // Create a private key for this library. It is based on the hash of the
 // library URI and the sequence number of the library to guarantee unique
 // private keys without having to verify.
 void Library::AllocatePrivateKey() const {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
 
+#if !defined(PRODUCT)
   if (FLAG_support_reload && isolate->IsReloading()) {
     // When reloading, we need to make sure we use the original private key
     // if this library previously existed.
     IsolateReloadContext* reload_context = isolate->reload_context();
     const String& original_key =
         String::Handle(reload_context->FindLibraryPrivateKey(*this));
     if (!original_key.IsNull()) {
       StorePointer(&raw_ptr()->private_key_, original_key.raw());
       return;
     }
   }
+#endif  // !defined(PRODUCT)
 
   // Format of the private key is: "@<sequence number><6 digits of hash>
   const intptr_t hash_mask = 0x7FFFF;
 
   const String& url = String::Handle(zone, this->url());
   intptr_t hash_value = url.Hash() & hash_mask;
 
   const GrowableObjectArray& libs =
       GrowableObjectArray::Handle(zone, isolate->object_store()->libraries());
   intptr_t sequence_value = libs.Length();
@@ skipping 11470 matching lines @@
   }
   return UserTag::null();
 }
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart