[turbofan] Rename JSGlobalSpecialization to JSNativeContextSpecialization.

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

 // 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.
 
-#ifndef V8_COMPILER_JS_GLOBAL_SPECIALIZATION_H_
-#define V8_COMPILER_JS_GLOBAL_SPECIALIZATION_H_
+#ifndef V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_
+#define V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class CompilationDependencies;
 
 
 namespace compiler {
 
 // Forward declarations.
 class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
 class MachineOperatorBuilder;
 
 
-// Specializes a given JSGraph to a given GlobalObject, potentially constant
+// Specializes a given JSGraph to a given native context, potentially constant
 // folding some {LoadGlobal} nodes or strength reducing some {StoreGlobal}
-// nodes.
-class JSGlobalSpecialization final : public AdvancedReducer {
+// nodes.  And also specializes {LoadNamed} and {StoreNamed} nodes according
+// to type feedback (if available).
+class JSNativeContextSpecialization final : public AdvancedReducer {
  public:
   // Flags that control the mode of operation.
   enum Flag {
     kNoFlags = 0u,
     kDeoptimizationEnabled = 1u << 0,
   };
   typedef base::Flags<Flag> Flags;
 
-  JSGlobalSpecialization(Editor* editor, JSGraph* jsgraph, Flags flags,
-                         Handle<GlobalObject> global_object,
-                         CompilationDependencies* dependencies, Zone* zone);
+  JSNativeContextSpecialization(Editor* editor, JSGraph* jsgraph, Flags flags,
+                                Handle<GlobalObject> global_object,
+                                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) {
@@ skipping 23 matching lines @@
   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);
+  DISALLOW_COPY_AND_ASSIGN(JSNativeContextSpecialization);
 };
 
-DEFINE_OPERATORS_FOR_FLAGS(JSGlobalSpecialization::Flags)
+DEFINE_OPERATORS_FOR_FLAGS(JSNativeContextSpecialization::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_COMPILER_JS_GLOBAL_SPECIALIZATION_H_
+#endif  // V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_