[clang] [llvm] [llvm][AArch64] Do not inline a function with different signing scheme. (PR #80642)

[Nick Desaulniers via cfe-commits]

nickdesaulniers wrote:

Also, consider submitting your 3 commits as 3 distinct PRs. The first is ready to land.  I think the auto upgrade could be detached from the inlining decisions.

Also, I'm kind of surprised you didn't have to change anything in clang codegen of LLVM IR.  Shouldn't clang now be generating fn attrs rather than module attrs?  Was there a different PR for that?

https://github.com/llvm/llvm-project/pull/80642