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

src/interpreter/bytecodes.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_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <iosfwd>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
@@ skipping 150 matching lines @@
   V(LogicalNot, OperandType::kNone)                                            \
   V(TypeOf, OperandType::kNone)                                                \
   V(DeletePropertyStrict, OperandType::kReg8)                                  \
   V(DeletePropertySloppy, OperandType::kReg8)                                  \
                                                                                \
   /* Call operations */                                                        \
   V(Call, OperandType::kReg8, OperandType::kReg8, OperandType::kRegCount8,     \
     OperandType::kIdx8)                                                        \
   V(CallWide, OperandType::kReg16, OperandType::kReg16,                        \
     OperandType::kRegCount16, OperandType::kIdx16)                             \
+  V(TailCall, OperandType::kReg8, OperandType::kReg8, OperandType::kRegCount8, \
+    OperandType::kIdx8)                                                        \
+  V(TailCallWide, OperandType::kReg16, OperandType::kReg16,                    \
+    OperandType::kRegCount16, OperandType::kIdx16)                             \
   V(CallRuntime, OperandType::kIdx16, OperandType::kMaybeReg8,                 \
     OperandType::kRegCount8)                                                   \
   V(CallRuntimeWide, OperandType::kIdx16, OperandType::kMaybeReg16,            \
     OperandType::kRegCount8)                                                   \
   V(CallRuntimeForPair, OperandType::kIdx16, OperandType::kMaybeReg8,          \
     OperandType::kRegCount8, OperandType::kRegOutPair8)                        \
   V(CallRuntimeForPairWide, OperandType::kIdx16, OperandType::kMaybeReg16,     \
     OperandType::kRegCount8, OperandType::kRegOutPair16)                       \
   V(CallJSRuntime, OperandType::kIdx16, OperandType::kReg8,                    \
     OperandType::kRegCount8)                                                   \
@@ skipping 317 matching lines @@
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
 std::ostream& operator<<(std::ostream& os, const OperandSize& operand_type);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_