[runtime] Store constructor function index on primitive maps.

src/ic/ic-inl.h

 // Copyright 2012 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.
 
 #ifndef V8_IC_INL_H_
 #define V8_IC_INL_H_
 
 #include "src/ic/ic.h"
 
 #include "src/compiler.h"
@@ skipping 109 matching lines @@
 
 
 Code* IC::raw_target() const {
   return GetTargetAtAddress(address(), constant_pool());
 }
 
 void IC::UpdateTarget() { target_ = handle(raw_target(), isolate_); }
 
 
 JSFunction* IC::GetRootConstructor(Map* receiver_map, Context* native_context) {
-  Isolate* isolate = receiver_map->GetIsolate();
-  if (receiver_map == isolate->heap()->boolean_map()) {
-    return native_context->boolean_function();
+  DisallowHeapAllocation no_alloc;
+  if (receiver_map->IsPrimitiveMap()) {
+    int constructor_function_index =
+        receiver_map->GetConstructorFunctionIndex();
+    if (constructor_function_index != Map::kNoConstructorFunctionIndex) {
+      return JSFunction::cast(native_context->get(constructor_function_index));
+    }
   }
-  if (receiver_map->instance_type() == HEAP_NUMBER_TYPE) {
-    return native_context->number_function();
-  }
-  if (receiver_map->instance_type() < FIRST_NONSTRING_TYPE) {
-    return native_context->string_function();
-  }
-  if (receiver_map->instance_type() == SYMBOL_TYPE) {
-    return native_context->symbol_function();
-  }
-#define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \
-  if (receiver_map == isolate->heap()->type##_map()) {        \
-    return native_context->type##_function();                 \
-  }
-  SIMD128_TYPES(SIMD128_TYPE)
-#undef SIMD128_TYPE
   return nullptr;
 }
 
 
 Handle<Map> IC::GetHandlerCacheHolder(Handle<Map> receiver_map,
                                       bool receiver_is_holder, Isolate* isolate,
                                       CacheHolderFlag* flag) {
   if (receiver_is_holder) {
     *flag = kCacheOnReceiver;
     return receiver_map;
@@ skipping 41 matching lines @@
 bool IC::AddressIsDeoptimizedCode(Isolate* isolate, Address address) {
   Code* host =
       isolate->inner_pointer_to_code_cache()->GetCacheEntry(address)->code;
   return (host->kind() == Code::OPTIMIZED_FUNCTION &&
           host->marked_for_deoptimization());
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_INL_H_