[clang] [llvm] target ABI: improve call parameters extensions handling (PR #100757)

[Nikita Popov via cfe-commits]

https://github.com/nikic commented:

I think the general direction is fine here. I would suggest to split this up into three parts: 1. Add noext attribute and disabled verification, 2. fix any verification failures (e.g. by emitting noext), 3. enable verification.

It would be good to still be able to enable the verification in llc via an opt option, so you can write tests for it (and maybe useful when reducing an issue). 

https://github.com/llvm/llvm-project/pull/100757