[llvm] [TableGen] Improve handling for dag op names (PR #149248)

[Krzysztof Drewniak via llvm-commits]

https://github.com/krzysz00 approved this pull request.

No objections, op seems reasonable, documentation updates good, lgtm pending the tablegen maintainers showing up to complain

https://github.com/llvm/llvm-project/pull/149248