[llvm] [WebAssembly] Implement getInterleavedMemoryOpCost (PR #146864)

[Derek Schuff via llvm-commits]

https://github.com/dschuff approved this pull request.

I think this is OK. I'll admit I'm not really an expert in the implementation here, I'm mostly going on the output, which does look like the kind of improvement that you'd expect from loop vectorization. There are maybe a few more regressions than would be ideal, but they are mostly small, and some of the improvements are quite impressive, I think it seems better overall. 

https://github.com/llvm/llvm-project/pull/146864