Add IR nodes needed for deferred loading.

runtime/vm/kernel_binary.cc

 // Copyright (c) 2016, 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.
 #if !defined(DART_PRECOMPILED_RUNTIME)
 
 #include <map>
 #include <vector>
 
 #include "platform/globals.h"
 #include "vm/flags.h"
@@ skipping 626 matching lines @@
 
 Library* Library::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   int flags = reader->ReadFlags();
   ASSERT(flags == 0);  // external libraries not supported
   name_ = Reference::ReadStringFrom(reader);
   import_uri_ = Reference::ReadStringFrom(reader);
   source_uri_index_ = reader->ReadUInt();
   reader->set_current_script_id(source_uri_index_);
 
+  int num_imports = reader->ReadUInt();
+  if (num_imports != 0) {
+    FATAL("Deferred imports not implemented in VM");
+  }
   int num_classes = reader->ReadUInt();
   classes().EnsureInitialized(num_classes);
   for (int i = 0; i < num_classes; i++) {
     Tag tag = reader->ReadTag();
     if (tag == kNormalClass) {
       NormalClass* klass = classes().GetOrCreate<NormalClass>(i, this);
       klass->ReadFrom(reader);
     } else {
       ASSERT(tag == kMixinClass);
       MixinClass* klass = classes().GetOrCreate<MixinClass>(i, this);
@@ skipping 1230 matching lines @@
 
 kernel::Program* ReadPrecompiledKernelFromBuffer(const uint8_t* buffer,
                                                  intptr_t buffer_length) {
   kernel::Reader reader(buffer, buffer_length);
   return kernel::Program::ReadFrom(&reader);
 }
 
 
 }  // namespace dart
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)