VM: Avoid smi-check when loading class-ids from known non-smi values

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 122 matching lines @@
   static CompileType Dynamic();
 
   static CompileType Null();
 
   // Create non-nullable Bool type.
   static CompileType Bool();
 
   // Create non-nullable Int type.
   static CompileType Int();
 
+  // Create non-nullable Smi type.
+  static CompileType Smi();
+
   // Create non-nullable String type.
   static CompileType String();
 
   // Perform a join operation over the type lattice.
   void Union(CompileType* other);
 
   // Returns true if this and other types are the same.
   bool IsEqualTo(CompileType* other) {
     return (is_nullable_ == other->is_nullable_) &&
         (ToNullableCid() == other->ToNullableCid()) &&
@@ skipping 8131 matching lines @@
   LocationSummary* Name::MakeLocationSummary(Zone* zone, bool opt) const {    \
     UNIMPLEMENTED();                                                          \
     return NULL;                                                              \
   }                                                                           \
   void Name::EmitNativeCode(FlowGraphCompiler* compiler) { UNIMPLEMENTED(); }
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_