[llvm] [SLP] NFC. Replace TreeEntry::setOperandsInOrder with VLOperands. (PR #113880)

[Alexey Bataev via llvm-commits]

https://github.com/alexey-bataev approved this pull request.

LG, please do not use force push, use stacked PRs

https://github.com/llvm/llvm-project/pull/113880