[llvm] [X86][GlobalISel] Added support for llvm.set.rounding (PR #156591)

[Pranav Kant via llvm-commits]

pranavk wrote:

Yeah, I meant the process crashes in general while it shouldn't. We noticed this because our test runner uses `bash -o pipefail`. This seems concerning that upstream testing was not able to detect it and crash was hidden.

https://github.com/llvm/llvm-project/pull/156591