[clang] [llvm] [transforms] Inline simple variadic functions (PR #81058)

[Johannes Doerfert via cfe-commits]

jdoerfert wrote:

High level question:
Does this patch eliminate the variadic call edge, or, does it perform inlining on very special variadic function definitions?
I thought the former but `isFunctionInlinable`, sufficiently confused me.



https://github.com/llvm/llvm-project/pull/81058