VM: Improve polymorphic check-class in optimized code.

runtime/vm/flow_graph_compiler.h

 // 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.
 
 #ifndef VM_FLOW_GRAPH_COMPILER_H_
 #define VM_FLOW_GRAPH_COMPILER_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/code_descriptors.h"
@@ skipping 483 matching lines @@
     if (current_block_ == NULL) {
       return CatchClauseNode::kInvalidTryIndex;
     }
     return current_block_->try_index();
   }
 
   bool may_reoptimize() const { return may_reoptimize_; }
 
   // Returns 'sorted' array in decreasing count order.
   static void SortICDataByCount(const ICData& ic_data,
-                                GrowableArray<CidTarget>* sorted);
+                                GrowableArray<CidTarget>* sorted,
+                                bool drop_smi);
 
   // Use in unoptimized compilation to preserve/reuse ICData.
   const ICData* GetOrAddInstanceCallICData(intptr_t deopt_id,
                                            const String& target_name,
                                            const Array& arguments_descriptor,
                                            intptr_t num_args_tested);
 
   const ICData* GetOrAddStaticCallICData(intptr_t deopt_id,
                                          const Function& target,
                                          const Array& arguments_descriptor,
@@ skipping 169 matching lines @@
 
   const Array* inlined_code_intervals_;
   const GrowableArray<const Function*>& inline_id_to_function_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_H_