[turbofan] Disable inline allocation of closures.

src/compiler/js-create-lowering.cc

 // Copyright 2016 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/compiler/js-create-lowering.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
@@ skipping 733 matching lines @@
         int capacity = static_cast<int>(length_type->Max());
         return ReduceNewArray(node, length, capacity, site);
       }
     }
   }
 
   return ReduceNewArrayToStubCall(node, site);
 }
 
 Reduction JSCreateLowering::ReduceJSCreateClosure(Node* node) {
+  if (!FLAG_turbo_lower_create_closure) return NoChange();
   DCHECK_EQ(IrOpcode::kJSCreateClosure, node->opcode());
   CreateClosureParameters const& p = CreateClosureParametersOf(node->op());
   Handle<SharedFunctionInfo> shared = p.shared_info();
   Node* effect = NodeProperties::GetEffectInput(node);
   Node* control = NodeProperties::GetControlInput(node);
   Node* context = NodeProperties::GetContextInput(node);
 
   int const function_map_index =
       Context::FunctionMapIndex(shared->language_mode(), shared->kind());
   Node* function_map = jsgraph()->HeapConstant(
@@ skipping 623 matching lines @@
   return jsgraph()->simplified();
 }
 
 MachineOperatorBuilder* JSCreateLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8