[llvm] [X86] Enable alias analysis (AA) during codegen (PR #123787)

[Benjamin Maxwell via llvm-commits]

MacDue wrote:

> @MacDue It's a nice improvement: https://llvm-compile-time-tracker.com/compare.php?from=b3ab8b78fc3f3bed0347a69bf035741a03862c94&to=033a963fb3f69491c8ada5422593b93d0b87f438&stat=instructions:u Can you please submit it as a separate PR?

Sure, will do :+1: 

https://github.com/llvm/llvm-project/pull/123787