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

src/compiler/js-global-specialization.h

Index: src/compiler/js-global-specialization.h
diff --git a/src/compiler/js-global-specialization.h b/src/compiler/js-global-specialization.h
index a040e9bdbfcb345e41ce7eaa51a866f8d305d5f0..eed9de89f6fd023bff28d9717625eba1f112c2dd 100644
--- a/src/compiler/js-global-specialization.h
+++ b/src/compiler/js-global-specialization.h
@@ -22,6 +22,7 @@ namespace compiler {
 class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
+class MachineOperatorBuilder;
 
 
 // Specializes a given JSGraph to a given GlobalObject, potentially constant
@@ -38,13 +39,14 @@ class JSGlobalSpecialization final : public AdvancedReducer {
 
   JSGlobalSpecialization(Editor* editor, JSGraph* jsgraph, Flags flags,
                          Handle<GlobalObject> global_object,
-                         CompilationDependencies* dependencies);
+                         CompilationDependencies* dependencies, Zone* zone);
 
   Reduction Reduce(Node* node) final;
 
  private:
   Reduction ReduceJSLoadGlobal(Node* node);
   Reduction ReduceJSStoreGlobal(Node* node);
+  Reduction ReduceJSLoadNamed(Node* node);
 
   Reduction Replace(Node* node, Node* value, Node* effect = nullptr,
                     Node* control = nullptr) {
@@ -53,6 +55,12 @@ class JSGlobalSpecialization final : public AdvancedReducer {
   }
   Reduction Replace(Node* node, Handle<Object> value);
 
+  class PropertyAccessInfo;
+  bool ComputePropertyAccessInfo(Handle<Map> map, Handle<Name> name,
+                                 PropertyAccessInfo* access_info);
+  bool ComputePropertyAccessInfos(MapHandleList const& maps, Handle<Name> name,
+                                  ZoneVector<PropertyAccessInfo>* access_infos);
+
   struct ScriptContextTableLookupResult;
   bool LookupInScriptContextTable(Handle<Name> name,
                                   ScriptContextTableLookupResult* result);
@@ -63,14 +71,17 @@ class JSGlobalSpecialization final : public AdvancedReducer {
   CommonOperatorBuilder* common() const;
   JSOperatorBuilder* javascript() const;
   SimplifiedOperatorBuilder* simplified() const;
+  MachineOperatorBuilder* machine() const;
   Flags flags() const { return flags_; }
   Handle<GlobalObject> global_object() const { return global_object_; }
   CompilationDependencies* dependencies() const { return dependencies_; }
+  Zone* zone() const { return zone_; }
 
   JSGraph* const jsgraph_;
   Flags const flags_;
   Handle<GlobalObject> global_object_;
   CompilationDependencies* const dependencies_;
+  Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(JSGlobalSpecialization);
 };