Shrink AOT snapshot size and memory usage.

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/native_entry.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
@@ skipping 746 matching lines @@
 
   // Write out the boolean is_in_fullsnapshot first as this will
   // help the reader decide how the rest of the information needs
   // to be interpreted.
   writer->Write<bool>(is_in_fullsnapshot);
 
   if (!is_in_fullsnapshot) {
     bool is_optimized = Code::IsOptimized(ptr()->code_);
 
     // Write out all the non object fields.
+#if !defined(DART_PRECOMPILED_RUNTIME)

[Florian Schneider, 2016/09/15 17:17:37]

In a separate CL, it may be worth excluding the writer code not used for
messages in precompiled runtime like you did for the clustered writer.

[rmacnak, 2016/09/16 21:59:02]

Acknowledged.

     writer->Write<int32_t>(ptr()->token_pos_.SnapshotEncode());
     writer->Write<int32_t>(ptr()->end_token_pos_.SnapshotEncode());
+#endif
     writer->Write<int16_t>(ptr()->num_fixed_parameters_);
     writer->Write<int16_t>(ptr()->num_optional_parameters_);
     writer->Write<uint32_t>(ptr()->kind_tag_);
+#if !defined(DART_PRECOMPILED_RUNTIME)
     if (is_optimized) {
       writer->Write<int32_t>(FLAG_optimization_counter_threshold);
     } else {
       writer->Write<int32_t>(0);
     }
     writer->Write<int8_t>(ptr()->deoptimization_counter_);
     writer->Write<uint16_t>(ptr()->optimized_instruction_count_);
     writer->Write<uint16_t>(ptr()->optimized_call_site_count_);
+#endif
 
     // Write out all the object pointer fields.
     SnapshotWriterVisitor visitor(writer, kAsReference);
     visitor.VisitPointers(from(), to_snapshot());
     if (is_optimized) {
       // Write out the ic data array as the function is optimized.
       writer->WriteObjectImpl(ptr()->ic_data_array_, kAsReference);
     }
   } else {
     writer->WriteFunctionId(this, owner_is_class);
@@ skipping 745 matching lines @@
 RawICData* ICData::ReadFrom(SnapshotReader* reader,
                             intptr_t object_id,
                             intptr_t tags,
                             Snapshot::Kind kind,
                             bool as_reference) {
   ASSERT(kind == Snapshot::kScript);
 
   ICData& result = ICData::ZoneHandle(reader->zone(), ICData::New());
   reader->AddBackRef(object_id, &result, kIsDeserialized);
 
-  result.set_deopt_id(reader->Read<int32_t>());
+  NOT_IN_PRECOMPILED(result.set_deopt_id(reader->Read<int32_t>()));
   result.set_state_bits(reader->Read<uint32_t>());
 #if defined(TAG_IC_DATA)
   result.set_tag(reader->Read<int16_t>());
 #endif
 
   // Set all the object fields.
   READ_OBJECT_FIELDS(result,
                      result.raw()->from(),
                      result.raw()->to_snapshot(kind),
                      kAsReference);
 
   return result.raw();
 }
 
 
 void RawICData::WriteTo(SnapshotWriter* writer,
                         intptr_t object_id,
                         Snapshot::Kind kind,
                         bool as_reference) {
   ASSERT(kind == Snapshot::kScript);
 
   // Write out the serialization header value for this object.
   writer->WriteInlinedObjectHeader(object_id);
 
   // Write out the class and tags information.
   writer->WriteVMIsolateObject(kICDataCid);
   writer->WriteTags(writer->GetObjectTags(this));
 
   // Write out all the non object fields.
-  writer->Write<int32_t>(ptr()->deopt_id_);
+  NOT_IN_PRECOMPILED(writer->Write<int32_t>(ptr()->deopt_id_));
   writer->Write<uint32_t>(ptr()->state_bits_);
 #if defined(TAG_IC_DATA)
   writer->Write<int16_t>(ptr()->tag_);
 #endif
 
   // Write out all the object pointer fields.
   // In precompiled snapshots, omit the owner field. The owner field may
   // refer to a function which was always inlined and no longer needed.
   SnapshotWriterVisitor visitor(writer, kAsReference);
   visitor.VisitPointers(from(), to_snapshot(kind));
@@ skipping 1456 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