[clang] [Clang][FIX] Fix type qualifiers on vector builtins (PR #160185)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> Thanks, that's definitely a significant step closer. I've given this a more detailed review. Unfortunately, writing builtins with custom type-checking can be a little tricky because of the range of languages we support in Clang. It mostly just involves making calls that you're supposed to be making anyway and checking for dependent types, but it's something every builtin needs to be doing.

Thanks, hopefully this is closer to what you had in mind now. It's definitely a lot of work to do all this type checking manually but I have a much better idea of what the edge cases we check for are. Appreciate the thorough reviews.

https://github.com/llvm/llvm-project/pull/160185