Description

It seems the MSVC bug has been resolved:

• https://developercommunity.visualstudio.com/t/corrupt-optimization-on-arm64-with-Ox-/10102551
• https://developercommunity.visualstudio.com/t/Prev-Issue---with-__assume-isnan-/1597317
  So should we remove the ifdef?

@cmb69 you know more about Windows than I do, so is this proposal reasonable?