Canonicalize CheckedSmiOp if compile type turns out to be smi.

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 6892 matching lines @@
 
   InstanceCallInstr* call() const { return call_; }
   Token::Kind op_kind() const { return op_kind_; }
   Value* left() const { return inputs_[0]; }
   Value* right() const { return inputs_[1]; }
 
   virtual bool CanDeoptimize() const { return true; }
 
   virtual EffectSet Effects() const { return EffectSet::All(); }
 
+  virtual Definition* Canonicalize(FlowGraph* flow_graph);
+
   PRINT_OPERANDS_TO_SUPPORT
 
   DECLARE_INSTRUCTION(CheckedSmiOp)
 
  private:
   InstanceCallInstr* call_;
   const Token::Kind op_kind_;
   DISALLOW_COPY_AND_ASSIGN(CheckedSmiOpInstr);
 };
 
@@ skipping 1370 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_