Merge pull request dotnet/coreclr#19857 from CarolEidt/Fix19674
authorCarol Eidt <carol.eidt@microsoft.com>
Fri, 7 Sep 2018 20:49:17 +0000 (13:49 -0700)
committerGitHub <noreply@github.com>
Fri, 7 Sep 2018 20:49:17 +0000 (13:49 -0700)
Morph ByRef args of SIMD field assign

Commit migrated from https://github.com/dotnet/coreclr/commit/6cabe95f9dec3162a7407deee3863809511e57be


Trivial merge