[llvm] [AArch64] Improve getPartialReductionCost for fixed-width VFs (PR #126538)

[Sam Tebbs via llvm-commits]

================
@@ -218,41 +218,50 @@ define i64 @dotp_i8_to_i64_has_neon_dotprod(ptr readonly %a, ptr readonly %b) #1
 ; CHECK-INTERLEAVE1-LABEL: define i64 @dotp_i8_to_i64_has_neon_dotprod(
----------------
SamTebbs33 wrote:

I think it would be good to add `not` to the start of the function name to match the convention with the other functions. Same for the i16 to i64 one.

https://github.com/llvm/llvm-project/pull/126538