[TargetInstrInfo] Why does MachineBranchPredicate::ComparePredicate have only PRED_EQ and PRED_NE?

Hi,

I wonder why MachineBranchPredicate::ComparePredicate has only PRED_EQ and PRED_NE but not other predicates such as GT, LT, etc. Is there a reason behind that?

Thanks,
Taewook