Add Genericity enum in VM to distinguish how a type is uninstantiated.

runtime/vm/il_printer.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/il_printer.h"
 
 #include "vm/flow_graph_range_analysis.h"
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 #include "vm/parser.h"
@@ skipping 618 matching lines @@
              expected);
   }
 
   f->Print(", immutable=%d", immutable_);
 }
 
 
 void InstantiateTypeInstr::PrintOperandsTo(BufferFormatter* f) const {
   const String& type_name = String::Handle(type().Name());
   f->Print("%s, ", type_name.ToCString());
-  instantiator()->PrintTo(f);
+  instantiator_type_arguments()->PrintTo(f);
 }
 
 
 void InstantiateTypeArgumentsInstr::PrintOperandsTo(BufferFormatter* f) const {
   const String& type_args = String::Handle(type_arguments().Name());
   f->Print("%s, ", type_args.ToCString());
-  instantiator()->PrintTo(f);
+  instantiator_type_arguments()->PrintTo(f);
 }
 
 
 void AllocateContextInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%" Pd "", num_context_variables());
 }
 
 
 void AllocateUninitializedContextInstr::PrintOperandsTo(
     BufferFormatter* f) const {
@@ skipping 659 matching lines @@
 }
 
 
 bool FlowGraphPrinter::ShouldPrint(const Function& function) {
   return false;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart