[es6] [interpreter] Add tail calls support to Ignition.

src/interpreter/interpreter-assembler.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_ASSEMBLER_H_
 #define V8_INTERPRETER_INTERPRETER_ASSEMBLER_H_
 
 #include "src/allocation.h"
 #include "src/base/smart-pointers.h"
 #include "src/builtins.h"
@@ skipping 66 matching lines @@
                                    compiler::Node* slot_index,
                                    compiler::Node* value);
 
   // Load the TypeFeedbackVector for the current function.
   compiler::Node* LoadTypeFeedbackVector();
 
   // Call JSFunction or Callable |function| with |arg_count|
   // arguments (not including receiver) and the first argument
   // located at |first_arg|.
   compiler::Node* CallJS(compiler::Node* function, compiler::Node* context,
-                         compiler::Node* first_arg, compiler::Node* arg_count);
+                         compiler::Node* first_arg, compiler::Node* arg_count,
+                         TailCallMode tail_call_mode);
 
   // Call constructor |constructor| with |arg_count| arguments (not
   // including receiver) and the first argument located at
   // |first_arg|. The |new_target| is the same as the
   // |constructor| for the new keyword, but differs for the super
   // keyword.
   compiler::Node* CallConstruct(compiler::Node* constructor,
                                 compiler::Node* context,
                                 compiler::Node* new_target,
                                 compiler::Node* first_arg,
@@ skipping 86 matching lines @@
   compiler::Node* stack_pointer_before_call_;
 
   DISALLOW_COPY_AND_ASSIGN(InterpreterAssembler);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_INTERPRETER_ASSEMBLER_H_