[ignition] Add bytecodes for loads/stores in the current context

src/interpreter/interpreter.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_INTERPRETER_INTERPRETER_H_
 #define V8_INTERPRETER_INTERPRETER_H_
 
 #include <memory>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
@@ skipping 124 matching lines @@
                              InterpreterAssembler* assembler);
 
   // Generates code to perform a lookup slot store depending on
   // |language_mode|.
   void DoStaLookupSlot(LanguageMode language_mode,
                        InterpreterAssembler* assembler);
 
   // Generates code to load a context slot.
   compiler::Node* BuildLoadContextSlot(InterpreterAssembler* assembler);
 
+  // Generates code to load a slot in the current context.
+  compiler::Node* BuildLoadCurrentContextSlot(InterpreterAssembler* assembler);
+
   // Generates code to load a global.
   compiler::Node* BuildLoadGlobal(Callable ic, compiler::Node* context,
                                   compiler::Node* feedback_slot,
                                   InterpreterAssembler* assembler);
 
   // Generates code to load a named property.
   compiler::Node* BuildLoadNamedProperty(Callable ic,
                                          InterpreterAssembler* assembler);
 
   // Generates code to load a keyed property.
@@ skipping 31 matching lines @@
   std::unique_ptr<uintptr_t[]> bytecode_dispatch_counters_table_;
 
   DISALLOW_COPY_AND_ASSIGN(Interpreter);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_INTERPRETER_H_