Auto merge of rust-lang#105262 - eduardosm:more-inline-always, r=thomcc

Make some trivial functions `#[inline(always)]`

This is some kind of follow-up of PRs like rust-lang#85218, rust-lang#84061, rust-lang#87150. Functions that do very basic operations are made `#[inline(always)]` to avoid pessimizing them in debug builds when compared to using built-in operations directly.

Author: bors