[clang] [llvm] [clang] report inlining decisions with -Wattribute-{warning|error} (PR #73552)

[David Blaikie via cfe-commits]

dwblaikie wrote:

> I did have a related RFC, but the [proposal](https://discourse.llvm.org/t/rfc-improving-clangs-middle-and-back-end-diagnostics/69261/16?u=nickdesaulniers) from @rnk is a yak shave that I don't intend to pursue.

I'd push on that a bit more. As I mentioned on the phab review, I think it'd be unfortunate to build a second system for tracking inlining apart from the debug info.

Guess it comes down to whether some sufficient quorum insist on that being necessary yak shaving here or not.

https://github.com/llvm/llvm-project/pull/73552