[turbofan] Don't flush LoadElimination on unsupported field stores.

src/compiler/load-elimination.h

 // 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.
 
 #ifndef V8_COMPILER_LOAD_ELIMINATION_H_
 #define V8_COMPILER_LOAD_ELIMINATION_H_
 
 #include "src/base/compiler-specific.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/globals.h"
@@ skipping 149 matching lines @@
       }
     }
 
     bool Equals(AbstractState const* that) const;
     void Merge(AbstractState const* that, Zone* zone);
 
     AbstractState const* AddField(Node* object, size_t index, Node* value,
                                   Zone* zone) const;
     AbstractState const* KillField(Node* object, size_t index,
                                    Zone* zone) const;
+    AbstractState const* KillFields(Node* object, Zone* zone) const;
     Node* LookupField(Node* object, size_t index) const;
 
     AbstractState const* AddElement(Node* object, Node* index, Node* value,
                                     Zone* zone) const;
     AbstractState const* KillElement(Node* object, Node* index,
                                      Zone* zone) const;
     Node* LookupElement(Node* object, Node* index) const;
 
     AbstractState const* AddCheck(Node* node, Zone* zone) const;
     Node* LookupCheck(Node* node) const;
@@ skipping 51 matching lines @@
   JSGraph* const jsgraph_;
 
   DISALLOW_COPY_AND_ASSIGN(LoadElimination);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LOAD_ELIMINATION_H_