Compress deopt instructions in memory using variable length encoding.

runtime/vm/raw_object_snapshot.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 "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 #include "vm/visitor.h"
@@ skipping 1324 matching lines @@
 }
 
 
 void RawExceptionHandlers::WriteTo(SnapshotWriter* writer,
                                    intptr_t object_id,
                                    Snapshot::Kind kind) {
   UNREACHABLE();
 }
 
 
-RawDeoptInfo* DeoptInfo::ReadFrom(SnapshotReader* reader,
-                                  intptr_t object_id,
-                                  intptr_t tags,
-                                  Snapshot::Kind kind) {
-  UNREACHABLE();
-  return DeoptInfo::null();
-}
-
-
-void RawDeoptInfo::WriteTo(SnapshotWriter* writer,
-                           intptr_t object_id,
-                           Snapshot::Kind kind) {
-  UNREACHABLE();
-}
-
-
 RawContext* Context::ReadFrom(SnapshotReader* reader,
                               intptr_t object_id,
                               intptr_t tags,
                               Snapshot::Kind kind) {
   ASSERT(reader != NULL);
 
   // Allocate context object.
   int32_t num_vars = reader->Read<int32_t>();
   Context& context = Context::ZoneHandle(reader->zone());
   reader->AddBackRef(object_id, &context, kIsDeserialized);
@@ skipping 1532 matching lines @@
     // We do not allow objects with native fields in an isolate message.
     writer->SetWriteException(Exceptions::kArgument,
                               "Illegal argument in isolate message"
                               " : (object is a UserTag)");
   } else {
     UNREACHABLE();
   }
 }
 
 }  // namespace dart