[interpreter] Support for ES6 class literals.

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 124 matching lines @@
     OperandType::kIdx8)                                                        \
   V(StoreICSloppyWide, OperandType::kReg8, OperandType::kIdx16,                \
     OperandType::kIdx16)                                                       \
   V(StoreICStrictWide, OperandType::kReg8, OperandType::kIdx16,                \
     OperandType::kIdx16)                                                       \
   V(KeyedStoreICSloppyWide, OperandType::kReg8, OperandType::kReg8,            \
     OperandType::kIdx16)                                                       \
   V(KeyedStoreICStrictWide, OperandType::kReg8, OperandType::kReg8,            \
     OperandType::kIdx16)                                                       \
                                                                                \
+  /* Class information */                                                      \
+  V(LdaInitialMap, OperandType::kNone)                                         \
+                                                                               \
   /* Binary Operators */                                                       \
   V(Add, OperandType::kReg8)                                                   \
   V(Sub, OperandType::kReg8)                                                   \
   V(Mul, OperandType::kReg8)                                                   \
   V(Div, OperandType::kReg8)                                                   \
   V(Mod, OperandType::kReg8)                                                   \
   V(BitwiseOr, OperandType::kReg8)                                             \
   V(BitwiseXor, OperandType::kReg8)                                            \
   V(BitwiseAnd, OperandType::kReg8)                                            \
   V(ShiftLeft, OperandType::kReg8)                                             \
@@ skipping 145 matching lines @@
 #undef COUNT_BYTECODE
 };
 
 
 // An interpreter Register which is located in the function's Register file
 // in its stack-frame. Register hold parameters, this, and expression values.
 class Register {
  public:
   explicit Register(int index = kInvalidIndex) : index_(index) {}
 
-  int index() const {
-    DCHECK(index_ != kInvalidIndex);
-    return index_;
-  }
+  int index() const { return index_; }
   bool is_parameter() const { return index() < 0; }
   bool is_valid() const { return index_ != kInvalidIndex; }
   bool is_byte_operand() const;
   bool is_short_operand() const;
 
   static Register FromParameterIndex(int index, int parameter_count);
   int ToParameterIndex(int parameter_count) const;
   static int MaxParameterIndex();
   static int MaxRegisterIndex();
   static int MaxRegisterIndexForByteOperand();
@@ skipping 163 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_