[llvm] Fix code quality issues. (PR #160851)

[Cyndy Ishida via llvm-commits]

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

LGTM, but could you change the commit/PR title to be more specific when merging? e.g. 
`[llvm] Fix Rule of Three/Five issues NFC` 

https://github.com/llvm/llvm-project/pull/160851