[llvm] [WebAssembly] [Codegen] Add patterns for relaxed dot (PR #163266)

[Derek Schuff via llvm-commits]

dschuff wrote:

I don't think I'd wait for it. It doesn't cover running the tests on wasm, and in any case it's mostly focused on library compliance rather than codegen. (Which isn't to say that codegen changes can't break it, but the likelihood seems small enough that I don't think it's worth waiting arbitrary amounts of time for the job to start).

https://github.com/llvm/llvm-project/pull/163266