[clang] [llvm] [ARM] Add support for Windows SEH (PR #184953)

[Martin Storsjö via cfe-commits]

mstorsjo wrote:

Whether LLVM supports targeting ARM mode for 32 bit ARM on Windows, or only Thumb, is a separate topic here - and it's getting off topic.

Currently LLVM only supports Thumb mode for Windows on ARM, and this is already a very very niche target. I'm not currently expecting this to change.

So for now, I think it's off topic to request any consideration for potential ARM mode anywhere in this patch. Documenting where things would differ for ARM mode, and possibly adding assertions to make the assumptions clear is of course welcome.

>  MSVC does generate ARM‑mode functions in real binaries.

I'd like to see an example of where MSVC does this - I'm not aware of such a case. But this is very much off topic, so if you want to follow up on this, please open a separate issue for discussion on the topic of ARM mode on Windows on ARM32.


https://github.com/llvm/llvm-project/pull/184953