[llvm] Added const reference for params wth size >= 16 bytes (PR #125074)

[James Henderson via llvm-commits]

jh7370 wrote:

This PR needs breaking up into independent ones for easier review.

Also, I'm pretty sure `MemoryBufferRef` is intended for passing by value (note the `Ref` part of the name). It's just a pair of pointers... 16 bytes is too small. By that logic, `std::string_view` should be passed by `const &`, at least on Windows, but presumably for others too.

https://github.com/llvm/llvm-project/pull/125074