[generators] Replace some runtime functions with Turbofan JS operators.

src/compiler/access-builder.h

 // Copyright 2014 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_ACCESS_BUILDER_H_
 #define V8_COMPILER_ACCESS_BUILDER_H_
 
 #include "src/compiler/simplified-operator.h"
 
 namespace v8 {
@@ skipping 34 matching lines @@
 
   // Provides access to JSFunction::literals() field.
   static FieldAccess ForJSFunctionLiterals();
 
   // Provides access to JSFunction::code() field.
   static FieldAccess ForJSFunctionCodeEntry();
 
   // Provides access to JSFunction::next_function_link() field.
   static FieldAccess ForJSFunctionNextFunctionLink();
 
+  // Provides access to JSGeneratorObject::context() field.
+  static FieldAccess ForJSGeneratorObjectContext();
+
+  // Provides access to JSGeneratorObject::continuation() field.
+  static FieldAccess ForJSGeneratorObjectContinuation();
+
+  // Provides access to JSGeneratorObject::operand_stack() field.
+  static FieldAccess ForJSGeneratorObjectOperandStack();
+
   // Provides access to JSArray::length() field.
   static FieldAccess ForJSArrayLength(ElementsKind elements_kind);
 
   // Provides access to JSArrayBuffer::backing_store() field.
   static FieldAccess ForJSArrayBufferBackingStore();
 
   // Provides access to JSArrayBuffer::bit_field() field.
   static FieldAccess ForJSArrayBufferBitField();
 
   // Provides access to JSArrayBufferView::buffer() field.
@@ skipping 79 matching lines @@
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(AccessBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ACCESS_BUILDER_H_