[turbofan] Always install code dependency when optimizing a store to global property.

src/compiler/js-global-object-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-global-object-specialization.h"
 
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-graph.h"
@@ skipping 207 matching lines @@
         property_cell_value_type = Type::SignedSmall();
         representation = MachineRepresentation::kTaggedSigned;
       }
       effect = graph()->NewNode(
           simplified()->StoreField(ForPropertyCellValue(
               representation, property_cell_value_type, name)),
           jsgraph()->HeapConstant(property_cell), value, effect, control);
       break;
     }
     case PropertyCellType::kMutable: {
-      // Store to non-configurable, data property on the global can be lowered
-      // to a field store, even without recording a code dependency on the cell,
-      // because the property cannot be deleted or reconfigured to an accessor
-      // or interceptor property.
-      if (property_details.IsConfigurable()) {
-        // Protect lowering by recording a code dependency on the cell.
-        dependencies()->AssumePropertyCell(property_cell);
-      }
+      // Record a code dependency on the cell, and just deoptimize if the
+      // property ever becomes read-only.
+      dependencies()->AssumePropertyCell(property_cell);
       effect = graph()->NewNode(
           simplified()->StoreField(ForPropertyCellValue(
               MachineRepresentation::kTagged, Type::NonInternal(), name)),
           jsgraph()->HeapConstant(property_cell), value, effect, control);
       break;
     }
   }
   ReplaceWithValue(node, value, effect, control);
   return Replace(value);
 }
@@ skipping 32 matching lines @@
   return jsgraph()->javascript();
 }
 
 SimplifiedOperatorBuilder* JSGlobalObjectSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8