Refactor unboxed fields in preparation of reusable SIMD boxes

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/cpu.h"
@@ skipping 6275 matching lines @@
 intptr_t Field::guarded_list_length() const {
   return Smi::Value(raw_ptr()->guarded_list_length_);
 }
 
 
 void Field::set_guarded_list_length(intptr_t list_length) const {
   raw_ptr()->guarded_list_length_ = Smi::New(list_length);
 }
 
 
+bool Field::IsUnboxedField() const {
+  // TODO(johnmccutchan): Add kFloat32x4Cid here.
+  return is_unboxing_candidate() && !is_final() && !is_nullable() &&
+         ((guarded_cid() == kDoubleCid));
+}
+
+
+bool Field::IsPotentialUnboxedField() const {
+  return is_unboxing_candidate() &&
+         (IsUnboxedField() || (!is_final() && (guarded_cid() == kIllegalCid)));
+}
+
+
 const char* Field::ToCString() const {
   if (IsNull()) {
     return "Field::null";
   }
   const char* kF0 = is_static() ? " static" : "";
   const char* kF1 = is_final() ? " final" : "";
   const char* kF2 = is_const() ? " const" : "";
   const char* kFormat = "Field <%s.%s>:%s%s%s";
   const char* field_name = String::Handle(name()).ToCString();
   const Class& cls = Class::Handle(owner());
@@ skipping 10903 matching lines @@
   return "_MirrorReference";
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   Instance::PrintToJSONStream(stream, ref);
 }
 
 
 }  // namespace dart