Add flag polymorphic_with_deopt (default true) and handle case when false: use megamorphic instead …

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 389 matching lines @@
                                  intptr_t token_pos,
                                  LocationSummary* locs);
 
   void EmitInstanceCall(ExternalLabel* target_label,
                         const ICData& ic_data,
                         intptr_t argument_count,
                         intptr_t deopt_id,
                         intptr_t token_pos,
                         LocationSummary* locs);
 
+  void EmitPolymorphicInstanceCall(const ICData& ic_data,
+                                   intptr_t argument_count,
+                                   const Array& argument_names,
+                                   intptr_t deopt_id,
+                                   intptr_t token_pos,
+                                   LocationSummary* locs);
+
   void EmitMegamorphicInstanceCall(const ICData& ic_data,
                                    intptr_t argument_count,
                                    intptr_t deopt_id,
                                    intptr_t token_pos,
                                    LocationSummary* locs);
 
   void EmitTestAndCall(const ICData& ic_data,
                        intptr_t arg_count,
                        const Array& arg_names,
                        Label* failed,
@@ skipping 290 matching lines @@
   Array& inlined_code_intervals_;
   const GrowableArray<const Function*>& inline_id_to_function_;
   const GrowableArray<intptr_t>& caller_inline_id_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_H_