[turbofan] Fix effect chain for polymorphic array access.

src/compiler/js-native-context-specialization.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-native-context-specialization.h"
 
 #include "src/accessors.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
@@ skipping 586 matching lines @@
               check = graph()->NewNode(simplified()->CheckIf(), check,
                                        this_effect, this_control);
               this_controls.push_back(this_control);
               this_effects.push_back(check);
               fallthrough_control = nullptr;
             } else {
               Node* branch = graph()->NewNode(common()->Branch(), check,
                                               fallthrough_control);
               this_controls.push_back(
                   graph()->NewNode(common()->IfTrue(), branch));
-              this_effects.push_back(effect);
+              this_effects.push_back(this_effect);
               fallthrough_control =
                   graph()->NewNode(common()->IfFalse(), branch);
             }
           }
 
           // Create single chokepoint for the control.
           int const this_control_count = static_cast<int>(this_controls.size());
           if (this_control_count == 1) {
             this_control = this_controls.front();
             this_effect = this_effects.front();
@@ skipping 885 matching lines @@
   return jsgraph()->javascript();
 }
 
 SimplifiedOperatorBuilder* JSNativeContextSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8