Reland "Optimize function across closures."

src/factory.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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/conversions.h"
 #include "src/isolate-inl.h"
@@ skipping 1340 matching lines @@
   Handle<JSObject> prototype = NewJSObjectFromMap(new_map);
 
   if (!function->shared()->is_generator()) {
     JSObject::AddProperty(prototype, constructor_string(), function, DONT_ENUM);
   }
 
   return prototype;
 }
 
 
+static bool ShouldOptimizeNewClosure(Isolate* isolate,
+                                     Handle<SharedFunctionInfo> info) {
+  return isolate->use_crankshaft() && !info->is_toplevel() &&
+         info->is_compiled() && info->allows_lazy_compilation() &&
+         !info->optimization_disabled() && !isolate->DebuggerHasBreakPoints();
+}
+
+
 Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
     Handle<SharedFunctionInfo> info,
     Handle<Context> context,
     PretenureFlag pretenure) {
   int map_index = Context::FunctionMapIndex(info->strict_mode(), info->kind());
   Handle<Map> map(Map::cast(context->native_context()->get(map_index)));
   Handle<JSFunction> result = NewFunction(map, info, context, pretenure);
 
   if (info->ic_age() != isolate()->heap()->global_ic_age()) {
     info->ResetForNewContext(isolate()->heap()->global_ic_age());
@@ skipping 17 matching lines @@
   if (index > 0) {
     // Caching of optimized code enabled and optimized code found.
     FixedArray* literals = info->GetLiteralsFromOptimizedCodeMap(index);
     if (literals != NULL) result->set_literals(literals);
     Code* code = info->GetCodeFromOptimizedCodeMap(index);
     DCHECK(!code->marked_for_deoptimization());
     result->ReplaceCode(code);
     return result;
   }
 
-  if (isolate()->use_crankshaft() &&
-      FLAG_always_opt &&
-      result->is_compiled() &&
-      !info->is_toplevel() &&
-      info->allows_lazy_compilation() &&
-      !info->optimization_disabled() &&
-      !isolate()->DebuggerHasBreakPoints()) {
+  if (FLAG_always_opt && ShouldOptimizeNewClosure(isolate(), info)) {
     result->MarkForOptimization();
+  } else if (info->optimize_next_closure() &&
+             ShouldOptimizeNewClosure(isolate(), info)) {
+    result->AttemptConcurrentOptimization();
   }
   return result;
 }
 
 
 Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
   Handle<FixedArray> array = NewFixedArray(length, TENURED);
   array->set_map_no_write_barrier(*scope_info_map());
   Handle<ScopeInfo> scope_info = Handle<ScopeInfo>::cast(array);
   return scope_info;
@@ skipping 1082 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal