[llvm] [llvm][x86] Add TLSDESC support for X86 code generation (PR #84085)

[Paul Kirth via llvm-commits]

ilovepi wrote:

Oh I wasn’t aware of that. And yeah I agree that the approach here isn’t as elegant. I’m still pretty new to the backend and SelectionDAG is a bit confusing to me. It didn’t occur to me that I could expand the tlscall that way without messing with the Apple TLS bits. 

https://github.com/llvm/llvm-project/pull/84085