[llvm] [FunctionAttrs] deduce attr `cold` on functions if all CG paths call a `cold` function (PR #101298)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw approved this pull request.

LGTM if compilation time regressions are acceptable.

But I'm still dubious about the usefulness of inferring `cold` from `coldcc`.


https://github.com/llvm/llvm-project/pull/101298