In optimized code use IC calls for instance calls that have no IC data instead of deoptimizing. The…

runtime/vm/flow_graph_compiler_x64.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_X64_H_
 #define VM_FLOW_GRAPH_COMPILER_X64_H_
 
 #ifndef VM_FLOW_GRAPH_COMPILER_H_
 #error Include flow_graph_compiler.h instead of flow_graph_compiler_x64.h.
 #endif
@@ skipping 107 matching lines @@
                                Label* is_instance_lbl,
                                Label* is_not_instance_lbl);
   void GenerateStringTypeCheck(Register kClassIdReg,
                                Label* is_instance_lbl,
                                Label* is_not_instance_lbl);
   void GenerateListTypeCheck(Register kClassIdReg,
                              Label* is_instance_lbl);
 
   void EmitComment(Instruction* instr);
 
+  void EmitOptimizedInstanceCall(ExternalLabel* target_label,
+                                 const ICData& ic_data,
+                                 const Array& arguments_descriptor,
+                                 intptr_t argument_count,
+                                 intptr_t deopt_id,
+                                 intptr_t token_pos,
+                                 LocationSummary* locs);
+
   void EmitInstanceCall(ExternalLabel* target_label,
                         const ICData& ic_data,
                         const Array& arguments_descriptor,
                         intptr_t argument_count,
                         intptr_t deopt_id,
                         intptr_t token_pos,
                         LocationSummary* locs);
 
   void EmitTestAndCall(const ICData& ic_data,
                        Register class_id_reg,
@@ skipping 59 matching lines @@
   void SaveLiveRegisters(LocationSummary* locs);
   void RestoreLiveRegisters(LocationSummary* locs);
 
   intptr_t CurrentTryIndex() const {
     if (current_block_ == NULL) {
       return CatchClauseNode::kInvalidTryIndex;
     }
     return current_block_->try_index();
   }
 
+  bool may_reoptimize() const { return may_reoptimize_; }
+
   static Condition FlipCondition(Condition condition);
 
   static bool EvaluateCondition(Condition condition, intptr_t l, intptr_t r);
 
   // Array/list element address computations.
   static FieldAddress ElementAddressForIntIndex(intptr_t cid,
                                                 Register array,
                                                 intptr_t offset);
   static FieldAddress ElementAddressForRegIndex(intptr_t cid,
                                                 Register array,
@@ skipping 87 matching lines @@
   // for convenience.  This is not the block's index in the block order,
   // which is reverse postorder.
   BlockEntryInstr* current_block_;
   ExceptionHandlerList* exception_handlers_list_;
   DescriptorList* pc_descriptors_list_;
   StackmapTableBuilder* stackmap_table_builder_;
   GrowableArray<BlockInfo*> block_info_;
   GrowableArray<CompilerDeoptInfo*> deopt_infos_;
   GrowableArray<SlowPathCode*> slow_path_code_;
   const bool is_optimizing_;
+  // Set to true if optimized code has IC calls.
+  bool may_reoptimize_;
 
   const Bool& bool_true_;
   const Bool& bool_false_;
   const Class& double_class_;
 
   ParallelMoveResolver parallel_move_resolver_;
 
   // Currently instructions generate deopt stubs internally by
   // calling AddDeoptStub.  To communicate deoptimization environment
   // that should be used when deoptimizing we store it in this variable.
   // In future AddDeoptStub should be moved out of the instruction template.
   Environment* pending_deoptimization_env_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_X64_H_