[compiler-rt] [llvm] Recommit "[FunctionAttrs] deduce attr `cold` on functions if all CG paths call a `cold` function" (PR #105559)

[via llvm-commits]

asmok-g wrote:

Heads-up: we're seeing probable miscompile in a google test after this commit. Working on a reproducer.

https://github.com/llvm/llvm-project/pull/105559