[llvm] [AArch64][LV][SLP] Vectorizers use getFRemInstrCost for frem costs (PR #82488)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

> True, but the newly introduced function makes it quite explicit to it's users.
> They can't use it by mistake without noticing. And now we'll have it in two places that we know are OK.

Same with adding the new parameter to the existing function, no difference at all.

> Exactly. Until codegen can fully handle frem, we'd prefer not to set any 'traps' for future patches and authors, and instead be very explicit about it.

As I said, this is not a problem of this patch

https://github.com/llvm/llvm-project/pull/82488