[Interpreter] Add support for loading literals from the constant pool.

src/interpreter/bytecodes.cc

Index: src/interpreter/bytecodes.cc
diff --git a/src/interpreter/bytecodes.cc b/src/interpreter/bytecodes.cc
index 8232b657e78e0d1de05c86db3754b287779a1ee9..5f334d1ff82ae844af75cfc528731fa89917e704 100644
--- a/src/interpreter/bytecodes.cc
+++ b/src/interpreter/bytecodes.cc
@@ -126,6 +126,9 @@ std::ostream& Bytecodes::Decode(std::ostream& os,
     OperandType op_type = GetOperandType(bytecode, i);
     uint8_t operand = operands_start[i];
     switch (op_type) {
+      case interpreter::OperandType::kIdx:
+        os << "[" << static_cast<unsigned int>(operand) << "]";
+        break;
       case interpreter::OperandType::kImm8:
         os << "#" << static_cast<int>(operand);
         break;