Change heuristic to determine which fields contain modifieable double boxes: do it if field was ini…

runtime/vm/raw_object.h

 // 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/globals.h"
@@ skipping 829 matching lines @@
 
   int32_t token_pos_;
   classid_t guarded_cid_;
   classid_t is_nullable_;  // kNullCid if field can contain null value and
                            // any other value otherwise.
   // Offset to the guarded length field inside an instance of class matching
   // guarded_cid_. Stored corrected by -kHeapObjectTag to simplify code
   // generated on platforms with weak addressing modes (ARM, MIPS).
   int8_t guarded_list_length_in_object_offset_;
 
-  uint8_t kind_bits_;  // static, final, const, has initializer.
+  uint8_t kind_bits_;  // static, final, const, has initializer....
 };
 
 
 class RawLiteralToken : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(LiteralToken);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->literal_);
   }
   RawString* literal_;  // Literal characters as they appear in source text.
@@ skipping 1333 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_