AOT: Enable optimizing native functions. Removes some initialization of unused split slots.

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 5959 matching lines @@
 void Function::SetNumOptionalParameters(intptr_t num_optional_parameters,
                                         bool are_optional_positional) const {
   ASSERT(num_optional_parameters >= 0);
   set_num_optional_parameters(are_optional_positional ?
                               num_optional_parameters :
                               -num_optional_parameters);
 }
 
 
 bool Function::IsOptimizable() const {
+  if (FLAG_precompiled_mode) {
+    return true;
+  }
   if (is_native()) {
     // Native methods don't need to be optimized.
     return false;
   }
-  if (FLAG_precompiled_mode) {
-    return true;
-  }
   const intptr_t function_length = end_token_pos().Pos() - token_pos().Pos();
   if (is_optimizable() && (script() != Script::null()) &&
       (function_length < FLAG_huge_method_cutoff_in_tokens)) {
     // Additional check needed for implicit getters.
     return (unoptimized_code() == Object::null()) ||
         (Code::Handle(unoptimized_code()).Size() <
             FLAG_huge_method_cutoff_in_code_size);
   }
   return false;
 }
@@ skipping 16964 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart