Sema: don't emit AIR `reduce` for single-element vectors
This is equivalent to `array_elem_val`, and doing that conversion in
Sema (seems reasonable since it's just a simple branch) is much easier
for the self-hosted x86_64 backend then actually handling this case.
7c31f9d4ffmlugg committed on 5/28/2025, 7:10:22 PM· committed by Jacob Youngparent7bfdb7f