[turbofan] Pass deoptimization mode to type feedback specializer.

src/compiler/js-type-feedback.cc

 // Copyright 2015 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-type-feedback.h"
 
 #include "src/property-details.h"
 
 #include "src/accessors.h"
 #include "src/ast.h"
@@ skipping 155 matching lines @@
 }
 
 
 Reduction JSTypeFeedbackSpecializer::ReduceJSLoadNamed(Node* node) {
   DCHECK(node->opcode() == IrOpcode::kJSLoadNamed);
   Node* receiver = node->InputAt(0);
   if (IsGlobalObject(receiver)) {
     return ReduceJSLoadNamedForGlobalVariable(node);
   }
 
-  if (!FLAG_turbo_deoptimization) return NoChange();
+  if (mode() != kDeoptimizationEnabled) return NoChange();
   Node* frame_state_before = GetFrameStateBefore(node);
   if (frame_state_before == nullptr) return NoChange();
 
   const LoadNamedParameters& p = LoadNamedParametersOf(node->op());
   Handle<Name> name = p.name().handle();
   SmallMapList maps;
 
   FeedbackVectorICSlot slot = js_type_feedback_->FindFeedbackVectorICSlot(node);
   if (slot.IsInvalid() ||
       oracle()->LoadInlineCacheState(slot) == UNINITIALIZED) {
@@ skipping 51 matching lines @@
     Node* constant = jsgraph()->Constant(constant_value);
     ReplaceWithValue(node, constant);
     return Replace(constant);
   }
 
   if (global_object_.is_null()) {
     // Nothing else can be done if we don't have a global object.
     return NoChange();
   }
 
-  if (FLAG_turbo_deoptimization) {
+  if (mode() == kDeoptimizationEnabled) {
     // Handle lookups in the script context.
     {
       Handle<ScriptContextTable> script_contexts(
           global_object_->native_context()->script_context_table());
       ScriptContextTable::LookupResult lookup;
       if (ScriptContextTable::Lookup(script_contexts, name, &lookup)) {
         // TODO(turbofan): introduce a LoadContext here.
         return NoChange();
       }
     }
@@ skipping 143 matching lines @@
       BailoutId id = OpParameter<FrameStateCallInfo>(node).bailout_id();
       if (id != BailoutId::None()) return frame_state;
     }
   }
   return nullptr;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8