Expose receiver check type in call type feedback.

src/heap.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2706 matching lines @@
   Object* result;
   if (!maybe_result->ToObject(&result)) return maybe_result;
 
   // Initialize the object
   HeapObject::cast(result)->set_map(code_map());
   Code* code = Code::cast(result);
   ASSERT(!CodeRange::exists() || CodeRange::contains(code->address()));
   code->set_instruction_size(desc.instr_size);
   code->set_relocation_info(ByteArray::cast(reloc_info));
   code->set_flags(flags);
+  if (code->is_call_stub() || code->is_keyed_call_stub()) {
+    code->set_check_type(RECEIVER_MAP_CHECK);
+  }
   code->set_deoptimization_data(empty_fixed_array());
   // Allow self references to created code object by patching the handle to
   // point to the newly allocated Code object.
   if (!self_reference.is_null()) {
     *(self_reference.location()) = code;
   }
   // Migrate generated code.
   // The generated code can contain Object** values (typically from handles)
   // that are dereferenced during the copy to point directly to the actual heap
   // objects. These pointers can include references to the code object itself,
@@ skipping 2799 matching lines @@
 void ExternalStringTable::TearDown() {
   new_space_strings_.Free();
   old_space_strings_.Free();
 }
 
 
 List<Object*> ExternalStringTable::new_space_strings_;
 List<Object*> ExternalStringTable::old_space_strings_;
 
 } }  // namespace v8::internal