[turbofan] Initial support for monomorphic/polymorphic property stores.

src/compiler/js-native-context-specialization.h

Index: src/compiler/js-native-context-specialization.h
diff --git a/src/compiler/js-native-context-specialization.h b/src/compiler/js-native-context-specialization.h
index 8c49b1b370aa43bee08e4776ba3f861f2159d0d9..6556e9e7445a899d213490f9fffed03928176554 100644
--- a/src/compiler/js-native-context-specialization.h
+++ b/src/compiler/js-native-context-specialization.h
@@ -50,6 +50,7 @@ class JSNativeContextSpecialization final : public AdvancedReducer {
   Reduction ReduceJSLoadGlobal(Node* node);
   Reduction ReduceJSStoreGlobal(Node* node);
   Reduction ReduceJSLoadNamed(Node* node);
+  Reduction ReduceJSStoreNamed(Node* node);
 
   Reduction Replace(Node* node, Node* value, Node* effect = nullptr,
                     Node* control = nullptr) {
@@ -58,10 +59,13 @@ class JSNativeContextSpecialization final : public AdvancedReducer {
   }
   Reduction Replace(Node* node, Handle<Object> value);
 
+  enum PropertyAccessMode { kLoad, kStore };
   class PropertyAccessInfo;
   bool ComputePropertyAccessInfo(Handle<Map> map, Handle<Name> name,
+                                 PropertyAccessMode access_mode,
                                  PropertyAccessInfo* access_info);
   bool ComputePropertyAccessInfos(MapHandleList const& maps, Handle<Name> name,
+                                  PropertyAccessMode access_mode,
                                   ZoneVector<PropertyAccessInfo>* access_infos);
 
   struct ScriptContextTableLookupResult;