OPT_PhysicalRegisterSet phys = ir.regpool.getPhysicalRegisterSet();
  private void saveFloatingPointState(OPT_Instruction inst) {    OPT_PhysicalRegisterSet phys = ir.regpool.getPhysicalRegisterSet();    OPT_Operand M = new OPT_StackLocationOperand(true, -fsaveLocation, 4);    inst.insertBefore(MIR_FSave.create(IA32_FNSAVE, M));  }