compiler: fix crash on invalid result type for `@splat`

This introduces a new ZIR instruction, `vec_elem_type`.

Co-Authored-By: Ali Chraghi <alichraghi@proton.me>
Resolves: #16567
93e53d1e00mlugg committed on 8/9/2023, 6:46:58 PMparent6917a8c
5 files changedLine totals unavailable