[llvm] solve #65072, scalarize binary ops of splats by not check isTypeLegal (PR #100749)

[via llvm-commits]

github-actions[bot] wrote:

⚠️ We detected that you are using a GitHub private e-mail address to contribute to the repo.<br/> Please turn off [Keep my email addresses private](https://github.com/settings/emails) setting in your account.<br/> See [LLVM Discourse](https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it) for more information.

https://github.com/llvm/llvm-project/pull/100749