Recognize and optimize a.runtimeType == b.runtimeType pattern.

runtime/vm/flow_graph_inliner.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_INLINER_H_
 #define VM_FLOW_GRAPH_INLINER_H_
 
 #include "vm/allocation.h"
 #include "vm/growable_array.h"
 
 namespace dart {
 
 class Definition;
 class Field;
 class FlowGraph;
 class ForwardInstructionIterator;
 class Function;
 class InstanceCallInstr;
 class Instruction;
 class StaticCallInstr;
 class TargetEntryInstr;
+class Precompiler;
 
 class FlowGraphInliner : ValueObject {
  public:
   FlowGraphInliner(FlowGraph* flow_graph,
                    GrowableArray<const Function*>* inline_id_to_function,
                    GrowableArray<TokenPosition>* inline_id_to_token_pos,
                    GrowableArray<intptr_t>* caller_inline_id,
                    bool use_speculative_inlining,
-                   GrowableArray<intptr_t>* inlining_black_list);
+                   GrowableArray<intptr_t>* inlining_black_list,
+                   Precompiler* precompiler);
 
   // The flow graph is destructively updated upon inlining.
   void Inline();
 
   // Compute graph info if it was not already computed or if 'force' is true.
   static void CollectGraphInfo(FlowGraph* flow_graph, bool force = false);
   static void SetInliningId(FlowGraph* flow_graph, intptr_t inlining_id);
 
   bool AlwaysInline(const Function& function);
 
@@ skipping 29 matching lines @@
  private:
   friend class CallSiteInliner;
 
   FlowGraph* flow_graph_;
   GrowableArray<const Function*>* inline_id_to_function_;
   GrowableArray<TokenPosition>* inline_id_to_token_pos_;
   GrowableArray<intptr_t>* caller_inline_id_;
   const bool trace_inlining_;
   const bool use_speculative_inlining_;
   GrowableArray<intptr_t>* inlining_black_list_;
+  Precompiler* precompiler_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphInliner);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_INLINER_H_