[clang] [profile] runtime counter relocation is needed on windows-msvc targets (PR #127858)

[Martin Storsjö via cfe-commits]

mstorsjo wrote:

> Doesn't mingw target support it?

I'm pretty sure that profiling already works, both in mingw and MSVC configurations. I'm not familiar with all the nuances in various forms of profiling though, so it's unclear to me if this is some specific fringe configuration which didn't work before, or what this change actually changes.

Can you summarize the high level use case which didn't work before, and in which way it used to fail before, which gets fixed by this change?

https://github.com/llvm/llvm-project/pull/127858