[llvm] [msan] Implement support for avx512fp16.mask.{add/sub/mul/div/max/min}.sh.round (PR #137441)

[Thurston Dang via llvm-commits]

thurstond wrote:

> Relevant test is failing on windows bot

Argh, evaluation order got me again. Fixed in https://github.com/llvm/llvm-project/pull/137441/commits/33ee8544bb15376f861676a5a4c28d706671123f

https://github.com/llvm/llvm-project/pull/137441