public static void lowerGET_OBJ_TIB(OPT_Instruction s, OPT_IR ir) {
public static void lowerGET_OBJ_TIB(OPT_Instruction s, OPT_IR ir) throws VM_PragmaInterruptible {
  public static void lowerGET_OBJ_TIB(OPT_Instruction s, OPT_IR ir) {    // TODO: valid location operand.    OPT_Operand address = GuardedUnary.getClearVal(s);    Load.mutate(s, INT_LOAD, GuardedUnary.getClearResult(s),                 address, new OPT_IntConstantOperand(TIB_OFFSET),                 null, GuardedUnary.getClearGuard(s));  }