[Interpreter] Add support for JS runtime calls.

src/interpreter/bytecodes.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/bytecodes.h"
 
 #include "src/frames.h"
 #include "src/interpreter/bytecode-traits.h"
 
 namespace v8 {
@@ skipping 213 matching lines @@
       case interpreter::OperandType::kIdx8:
         os << "[" << static_cast<unsigned int>(*operand_start) << "]";
         break;
       case interpreter::OperandType::kIdx16: {
         os << "[" << Bytecodes::ShortOperandFromBytes(operand_start) << "]";
         break;
       }
       case interpreter::OperandType::kImm8:
         os << "#" << static_cast<int>(static_cast<int8_t>(*operand_start));
         break;
-      case interpreter::OperandType::kReg8: {
+      case interpreter::OperandType::kReg8:
+      case interpreter::OperandType::kMaybeReg8: {
         Register reg = Register::FromOperand(*operand_start);
         if (reg.is_function_context()) {
           os << "<context>";
         } else if (reg.is_function_closure()) {
           os << "<closure>";
         } else if (reg.is_parameter()) {
           int parameter_index = reg.ToParameterIndex(parameter_count);
           if (parameter_index == 0) {
             os << "<this>";
           } else {
@@ skipping 106 matching lines @@
   }
   if (reg5.is_valid() && reg4.index() + 1 != reg5.index()) {
     return false;
   }
   return true;
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8