[Interpreter] Add for/while/do support to the bytecode generator.

src/interpreter/bytecode-generator.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_BYTECODE_GENERATOR_H_
 #define V8_INTERPRETER_BYTECODE_GENERATOR_H_
 
 #include "src/ast.h"
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecodes.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
 class BytecodeGenerator : public AstVisitor {
  public:
   BytecodeGenerator(Isolate* isolate, Zone* zone);
   virtual ~BytecodeGenerator();
 
   Handle<BytecodeArray> MakeBytecode(CompilationInfo* info);
 
 #define DECLARE_VISIT(type) void Visit##type(type* node) override;
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
  private:
+  class ControlScope;
+  class ControlScopeForIteration;
+
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
 
   void VisitArithmeticExpression(BinaryOperation* binop);
   void VisitPropertyLoad(Register obj, Property* expr);
   void VisitVariableLoad(Variable* variable);
 
-  inline BytecodeArrayBuilder& builder() { return builder_; }
+  inline BytecodeArrayBuilder* builder() { return &builder_; }
   inline Scope* scope() const { return scope_; }
   inline void set_scope(Scope* scope) { scope_ = scope; }
+  inline ControlScope* control_scope() const { return control_scope_; }
+  inline void set_control_scope(ControlScope* scope) { control_scope_ = scope; }
   inline CompilationInfo* info() const { return info_; }
   inline void set_info(CompilationInfo* info) { info_ = info; }
 
   LanguageMode language_mode() const;
   int feedback_index(FeedbackVectorICSlot slot) const;
 
   BytecodeArrayBuilder builder_;
   CompilationInfo* info_;
   Scope* scope_;
+  ControlScope* control_scope_;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_GENERATOR_H_