[llvm] draft: inline asm mode (PR #146215)

[Andrew Pinski via llvm-commits]

pinskia wrote:

If anything this should be part of the (clang?) static analyzer instead because of the false positives due to the `%=` usage that comes from the inline-asm. Just like the rust inline-asm linter exist. Though I feel like static analyzer for inline-asm could be broken in general and not just because of things like the fix needed for https://github.com/rust-lang/rust/issues/143021 but for other reasons.

https://github.com/llvm/llvm-project/pull/146215