[llvm] [ConstantTime][LLVM] Add llvm.ct.select intrinsic with generic SelectionDAG lowering (PR #166702)

[Akshay K via llvm-commits]

kumarak wrote:

@topperc @arsenm @nikic @RKSimon

I’ve submitted a request for LLVM commit access (https://github.com/llvm/llvm-project/issues/210594) to help unblock progress on the constant-time PR series. Without it, every revision has to go through another committer, which delays responding to review feedback and landing updates.

When you have a chance, I’d appreciate your support or any guidance on the best way to move this work forward if commit access isn’t the right path.

Thanks!

https://github.com/llvm/llvm-project/pull/166702