Cache IC handlers on the prototype's map if possible

src/hydrogen.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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2448 matching lines @@
     bool CanAccessMonomorphic();
 
     // Checks whether all types behave uniform when loading name. If all maps
     // behave the same, a single monomorphic load instruction can be emitted,
     // guarded by a single map-checks instruction that whether the receiver is
     // an instance of any of the types.
     // This method skips the first type in types, assuming that this
     // PropertyAccessInfo is built for types->first().
     bool CanAccessAsMonomorphic(SmallMapList* types);
 
-    Handle<Map> map() {
-      if (type_->Is(Type::Number())) {
-        Context* context = current_info()->closure()->context();
-        context = context->native_context();
-        return handle(context->number_function()->initial_map());
-      } else if (type_->Is(Type::Boolean())) {
-        Context* context = current_info()->closure()->context();
-        context = context->native_context();
-        return handle(context->boolean_function()->initial_map());
-      } else if (type_->Is(Type::String())) {
-        Context* context = current_info()->closure()->context();
-        context = context->native_context();
-        return handle(context->string_function()->initial_map());
-      } else {
-        return type_->AsClass()->Map();
-      }
-    }
+    Handle<Map> map();
     Type* type() const { return type_; }
     Handle<String> name() const { return name_; }
 
     bool IsJSObjectFieldAccessor() {
       int offset;  // unused
       return Accessors::IsJSObjectFieldAccessor<Type>(type_, name_, &offset);
     }
 
     bool GetJSObjectFieldAccess(HObjectAccess* access) {
       int offset;
@@ skipping 411 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_