[llvm] [Support] Give llvm_strlcpy restrict semantics (PR #78168)

[Nikita Popov via llvm-commits]

nikic wrote:

> > This looks like an unnecessary change for the sake of change.
> 
> It is just for consistency.

Consistency with what? This is an utterly unimportant helper used only by the regex implementation, which is imported from a 3rd party to boot. The code is not performance critical, so why would we care to sprinkle about dangerous optimization attributes in its implementation?

https://github.com/llvm/llvm-project/pull/78168