[compiler-rt] [llvm] [Transforms][IPO] Add func suffix in ArgumentPromotion and DeadArgumentElimination (PR #109899)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> In kernel tracing, if func name is not changed, the func signature will be assumed to be based on source code. If compiler silently changes signature, then kernel tracing could get incorrect result. So we either need to change func name to indicate func signature have changed or we need additional information in the binary which will tell signature has changed and better what is the new signature.

The signature won't change if it's externally visible. 

https://github.com/llvm/llvm-project/pull/109899