Refactor the check for generating inline constructors...

src/runtime.cc

 // Copyright 2006-2009 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 4832 matching lines @@
   PretenureFlag pretenure = (context->global_context() == *context)
       ? TENURED       // Allocate global closures in old space.
       : NOT_TENURED;  // Allocate local closures in new space.
   Handle<JSFunction> result =
       Factory::NewFunctionFromBoilerplate(boilerplate, context, pretenure);
   return *result;
 }
 
 
 static Code* ComputeConstructStub(Handle<JSFunction> function) {
-  if (FLAG_inline_new
-      && function->shared()->has_only_simple_this_property_assignments()
-      && (!function->has_instance_prototype()
-          || !JSObject::cast(function->instance_prototype())->HasSetter())) {
+  Handle<Object> prototype = Factory::null_value();
+  if (function->has_instance_prototype()) {
+    prototype = Handle<Object>(function->instance_prototype());
+  }
+  if (function->shared()->CanGenerateInlineConstructor(*prototype)) {
     ConstructStubCompiler compiler;
     Object* code = compiler.CompileConstructStub(function->shared());
     if (code->IsFailure()) {
       return Builtins::builtin(Builtins::JSConstructStubGeneric);
     }
     return Code::cast(code);
   }
 
   return function->shared()->construct_stub();
 }
@@ skipping 3372 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal