[clang] [CIR] X86 vector masked load builtins (PR #169464)

[via cfe-commits]

woruyu wrote:

@andykaylor — does this meet your expectations for using `cir.maskload`?

I’ve hit a pretty painful issue: it looks like I may need to rewrite all the `load` test cases by hand. I’ve updated three so far. Is there an easier way to get this done, or am I basically staring at a mountain of manual edits?

https://github.com/llvm/llvm-project/pull/169464