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

test/unittests/interpreter/interpreter-assembler-unittest.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 "test/unittests/interpreter/interpreter-assembler-unittest.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/node.h"
 #include "src/interface-descriptors.h"
@@ skipping 412 matching lines @@
             break;
           case interpreter::OperandType::kUImm:
             EXPECT_THAT(m.BytecodeOperandUImm(i),
                         m.IsUnsignedOperand(offset, operand_size));
             break;
           case interpreter::OperandType::kImm: {
             EXPECT_THAT(m.BytecodeOperandImm(i),
                         m.IsSignedOperand(offset, operand_size));
             break;
           }
-          case interpreter::OperandType::kMaybeReg:
+          case interpreter::OperandType::kRegList:
           case interpreter::OperandType::kReg:
           case interpreter::OperandType::kRegOut:
           case interpreter::OperandType::kRegOutPair:
           case interpreter::OperandType::kRegOutTriple:
           case interpreter::OperandType::kRegPair:
             EXPECT_THAT(m.BytecodeOperandReg(i),
                         m.IsSignedOperand(offset, operand_size));
             break;
           case interpreter::OperandType::kRuntimeId:
             EXPECT_THAT(m.BytecodeOperandRuntimeId(i),
@@ skipping 273 matching lines @@
     EXPECT_THAT(feedback_vector,
                 m.IsLoad(MachineType::AnyTagged(), load_literals_matcher,
                          IsIntPtrConstant(LiteralsArray::kFeedbackVectorOffset -
                                           kHeapObjectTag)));
   }
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8