[5701652400]

does profile guided optimisation reduce these checks?

[porridgeraisin]

Insofar as PGO helps inlining.

[5701652400]

I have hunch PGO does detect when bound check can be eliminated.

[delamon]

How so? PGO might indicate that most of the time arguments are in bounds, but that's not enough. It has to be a proof with 100% certainty before bound checks can be removed

[porridgeraisin]

bound check elimination exists separately, PGO can help unveil more opportunities for BCE.