[Interpreter]: Add kRegList operand type for register list operands.

src/interpreter/bytecode-array-iterator.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/bytecode-array-iterator.h"
 
 #include "src/interpreter/bytecode-decoder.h"
 #include "src/interpreter/interpreter-intrinsics.h"
 #include "src/objects-inl.h"
 
@@ skipping 122 matching lines @@
       Bytecodes::GetOperandOffset(current_bytecode(), operand_index,
                                   current_operand_scale());
   return BytecodeDecoder::DecodeRegisterOperand(operand_start, operand_type,
                                                 current_operand_scale());
 }
 
 int BytecodeArrayIterator::GetRegisterOperandRange(int operand_index) const {
   DCHECK_LE(operand_index, Bytecodes::NumberOfOperands(current_bytecode()));
   const OperandType* operand_types =
       Bytecodes::GetOperandTypes(current_bytecode());
-  DCHECK(Bytecodes::IsRegisterOperandType(operand_types[operand_index]));
-  if (operand_types[operand_index + 1] == OperandType::kRegCount) {
+  OperandType operand_type = operand_types[operand_index];
+  DCHECK(Bytecodes::IsRegisterOperandType(operand_type));
+  if (operand_type == OperandType::kRegList) {
     return GetRegisterCountOperand(operand_index + 1);
   } else {
-    OperandType operand_type = operand_types[operand_index];
     return Bytecodes::GetNumberOfRegistersRepresentedBy(operand_type);
   }
 }
 
 Runtime::FunctionId BytecodeArrayIterator::GetRuntimeIdOperand(
     int operand_index) const {
   OperandType operand_type =
       Bytecodes::GetOperandType(current_bytecode(), operand_index);
   DCHECK(operand_type == OperandType::kRuntimeId);
   uint32_t raw_id = GetUnsignedOperand(operand_index, operand_type);
@@ skipping 28 matching lines @@
     return current_offset() + smi->value() + current_prefix_offset();
   } else {
     UNREACHABLE();
     return kMinInt;
   }
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8