[Openmp-commits] [openmp] [NFC][OpenMP][OMPX] Use `[[clang::always_inline]]` instead of `inline` (PR #91294)

[Shilei Tian via Openmp-commits]

shiltian wrote:

> Why do we need these to be always_inline? The `inline` keyword pretty much just means that the function doesn't get a symbol, which is typical for header implementations like this. Some context in the description would help.

`inline` almost means nothing for a compiler, which would not make an attempt if it is `-O0`. On the other hand, `always_inline` tells the compiler to try to inline the function regardless of optimization level. We want this to make sure that there is no multiple defined symbols in any case.

https://github.com/llvm/llvm-project/pull/91294