[runtime] Store constructor function index on primitive maps.

src/ic/handler-compiler.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/cpu-profiler.h"
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
@@ skipping 81 matching lines @@
 }
 
 
 #define __ ACCESS_MASM(masm())
 
 
 Register NamedLoadHandlerCompiler::FrontendHeader(Register object_reg,
                                                   Handle<Name> name,
                                                   Label* miss,
                                                   ReturnHolder return_what) {
-  PrototypeCheckType check_type = CHECK_ALL_MAPS;
-  int function_index = -1;
-  if (map()->instance_type() < FIRST_NONSTRING_TYPE) {
-    function_index = Context::STRING_FUNCTION_INDEX;
-  } else if (map()->instance_type() == SYMBOL_TYPE) {
-    function_index = Context::SYMBOL_FUNCTION_INDEX;
-  } else if (map()->instance_type() == HEAP_NUMBER_TYPE) {
-    function_index = Context::NUMBER_FUNCTION_INDEX;
-  } else if (*map() == isolate()->heap()->boolean_map()) {
-    function_index = Context::BOOLEAN_FUNCTION_INDEX;
-// clang-format off
-#define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type)           \
-  } else if (map().is_identical_to(isolate()->factory()->type##_map())) { \
-    function_index = Context::TYPE##_FUNCTION_INDEX;
-  SIMD128_TYPES(SIMD128_TYPE)
-#undef SIMD128_TYPE
-    // clang-format on
-  } else {
-    check_type = SKIP_RECEIVER;
-  }
-
-  if (check_type == CHECK_ALL_MAPS) {
+  PrototypeCheckType check_type = SKIP_RECEIVER;
+  int function_index = map()->IsPrimitiveMap()
+                           ? map()->GetConstructorFunctionIndex()
+                           : Map::kNoConstructorFunctionIndex;
+  if (function_index != Map::kNoConstructorFunctionIndex) {
     GenerateDirectLoadGlobalFunctionPrototype(masm(), function_index,
                                               scratch1(), miss);
     Object* function = isolate()->native_context()->get(function_index);
     Object* prototype = JSFunction::cast(function)->instance_prototype();
     Handle<Map> map(JSObject::cast(prototype)->map());
     set_map(map);
     object_reg = scratch1();
+    check_type = CHECK_ALL_MAPS;
   }
 
   // Check that the maps starting from the prototype haven't changed.
   return CheckPrototypes(object_reg, scratch1(), scratch2(), scratch3(), name,
                          miss, check_type, return_what);
 }
 
 
 // Frontend for store uses the name register. It has to be restored before a
 // miss.
@@ skipping 451 matching lines @@
                                                  : kNoExtraICState);
         cached_stub = LoadDictionaryElementStub(isolate(), state).GetCode();
       }
     }
 
     handlers->Add(cached_stub);
   }
 }
 }  // namespace internal
 }  // namespace v8