case REF_IFCMP_opcode:case BOOLEAN_CMP_opcode:
case REF_IFCMP_opcode:case BOOLEAN_CMP_INT_opcode:case BOOLEAN_CMP_ADDR_opcode:
  private static boolean containsUnsupportedUse (OPT_IR ir, OPT_Register reg) {    for (OPT_RegisterOperand use = reg.useList; use != null;         use = (OPT_RegisterOperand)use.getNext()) {      switch (use.instruction.getOpcode()) {        case CHECKCAST_opcode:        case CHECKCAST_UNRESOLVED_opcode:        case MUST_IMPLEMENT_INTERFACE_opcode:        case CHECKCAST_NOTNULL_opcode:case GET_OBJ_TIB_opcode:        case INSTANCEOF_opcode:case INSTANCEOF_NOTNULL_opcode:        case INSTANCEOF_UNRESOLVED_opcode:        case REF_IFCMP_opcode:case BOOLEAN_CMP_opcode:          return  true;      }    }    return  false;  }