VM: Compute static guarded cid for final instance fields.

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 7458 matching lines @@
   result.set_is_double_initialized(false);
   result.set_owner(owner);
   result.set_token_pos(token_pos);
   result.set_has_initializer(false);
   result.set_is_unboxing_candidate(true);
   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.
-  const bool use_field_guards =
-      FLAG_use_field_guards && !isolate->HasAttemptedReload();
-  result.set_guarded_cid(use_field_guards ? kIllegalCid : kDynamicCid);
-  result.set_is_nullable(use_field_guards ? false : true);
+  const bool use_guarded_cid =
+      FLAG_precompiled_mode ||
+      (FLAG_use_field_guards && !isolate->HasAttemptedReload());
+  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_field_guards) {
+  if (is_final && use_guarded_cid) {
     result.set_guarded_list_length(Field::kUnknownFixedLength);
   } else {
     result.set_guarded_list_length(Field::kNoFixedLength);
   }
 }
 
 
 RawField* Field::New(const String& name,
                      bool is_static,
                      bool is_final,
@@ skipping 6692 matching lines @@
   return Thread::kNoDeoptId;
 }
 
 
 const char* Code::ToCString() const {
   Zone* zone = Thread::Current()->zone();
   if (IsStubCode()) {
     const char* name = StubCode::NameOfStub(UncheckedEntryPoint());
     return zone->PrintToString("[stub: %s]", name);
   } else {
-    return zone->PrintToString("Code entry:%" Px, UncheckedEntryPoint());
+    return zone->PrintToString("Code entry: 0x%" Px, UncheckedEntryPoint());
   }
 }
 
 
 RawString* Code::Name() const {
   const Object& obj = Object::Handle(owner());
   if (obj.IsNull()) {
     // Regular stub.
     Thread* thread = Thread::Current();
     Zone* zone = thread->zone();
@@ skipping 8556 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart