[Interpreter] Add support for new local function context creation.

src/interpreter/interpreter.cc

 // 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.
 
 #include "src/interpreter/interpreter.h"
 
 #include "src/code-factory.h"
 #include "src/compiler.h"
 #include "src/compiler/interpreter-assembler.h"
 #include "src/factory.h"
@@ skipping 329 matching lines @@
 // Calls the strict mode KeyStoreIC at FeedBackVector slot <slot> for <object>
 // and the key <key> with the value in the accumulator.
 void Interpreter::DoKeyedStoreICStrict(
     compiler::InterpreterAssembler* assembler) {
   Callable ic =
       CodeFactory::KeyedStoreICInOptimizedCode(isolate_, STRICT, UNINITIALIZED);
   DoPropertyStoreIC(ic, assembler);
 }
 
 
+// PushContext <context>
+//
+// Pushes the accumulator as the current context, and saves it in <context>
+void Interpreter::DoPushContext(compiler::InterpreterAssembler* assembler) {
+  Node* reg_index = __ BytecodeOperandReg8(0);
+  Node* context = __ GetAccumulator();
+  __ SetContext(context);
+  __ StoreRegister(context, reg_index);
+  __ Dispatch();
+}
+
+
+// PopContext <context>
+//
+// Pops the current context and sets <context> as the new context.
+void Interpreter::DoPopContext(compiler::InterpreterAssembler* assembler) {
+  Node* reg_index = __ BytecodeOperandReg8(0);
+  Node* context = __ LoadRegister(reg_index);
+  __ SetContext(context);
+  __ Dispatch();
+}
+
+
 void Interpreter::DoBinaryOp(Runtime::FunctionId function_id,
                              compiler::InterpreterAssembler* assembler) {
   // TODO(rmcilroy): Call ICs which back-patch bytecode with type specialized
   // operations, instead of calling builtins directly.
   Node* reg_index = __ BytecodeOperandReg8(0);
   Node* lhs = __ LoadRegister(reg_index);
   Node* rhs = __ GetAccumulator();
   Node* result = __ CallRuntime(function_id, lhs, rhs);
   __ SetAccumulator(result);
   __ Dispatch();
@@ skipping 348 matching lines @@
 //
 // Return the value in the accumulator.
 void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
   __ Return();
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8