[llvm] Add support for x87 registers on GISel register selection (PR #83528)

[Malay Sanghi via llvm-commits]

MalaySanghiIntel wrote:

> This commit is associated with a `users.noreply.github.com` email address. Per https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it/74223/32 , proper email addresses are preferred.

I've made my email public. Thanks for pointing this out.

https://github.com/llvm/llvm-project/pull/83528