[libcxx-commits] [libcxx] Mark some std::string functions noinline. (PR #72869)

[via libcxx-commits]

EricWF wrote:

The project has had a checked past with `_LIBCPP_ALWAYS_INLINE` and `_LIBCPP_NOINLINE` coming and going. I'm afraid this is the start to another one of those cycles.

For future readers of the code, I would like to leave more of a trace exactly _why_ we're doing this, and when it should and shouldn't be used to solve other problems.

https://github.com/llvm/llvm-project/pull/72869