Make int an abstract class.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 1015 matching lines @@
   return AbstractType::null();
 }
 
 
 RawAbstractType* CheckStackOverflowInstr::CompileType() const {
   return AbstractType::null();
 }
 
 
 RawAbstractType* BinarySmiOpInstr::CompileType() const {
-  return (op_kind() == Token::kSHL) ? Type::IntInterface() : Type::SmiType();
+  return (op_kind() == Token::kSHL) ? Type::IntType() : Type::SmiType();
 }
 
 
 intptr_t BinarySmiOpInstr::ResultCid() const {
   return (op_kind() == Token::kSHL) ? kDynamicCid : kSmiCid;
 }
 
 
 bool BinarySmiOpInstr::CanDeoptimize() const {
   switch (op_kind()) {
@@ skipping 643 matching lines @@
     value->set_use_index(use_index++);
     value->AddToEnvUseList();
   }
   instr->set_env(copy);
 }
 
 
 #undef __
 
 }  // namespace dart