why the translation should be done a second time for a "Load-store forwarding mis-match" when the translation has been done ?

[gxflying]

Hi sir:
I found that the when a load is scheduled because of it having partitial address overlapped with a older store,
it will be resshduled by IEW::rescheduleMemInst --> InstructionQueue::rescheduleMemInst where eventully set the translationCompleted flag and translationStated flag to false
then the load when be issue again will have to do address translation one more time while it has done the translation completely
so why should be this flow? is it be better that just re-do the data request by the physical address having translated before ?
or is this a hardware constraint that the addr translation and the data request are integreted into one pipeline ?

InstructionQueue::rescheduleMemInst(const DynInstPtr &resched_inst)
{
    ...
    resched_inst->translationStarted(false);
    resched_inst->translationCompleted(false);
    ...
}