[llvm] [X86] Add llvm.x86.movnt, an opaque non-temporal store intrinsic (PR #228875)

[Jarrod Petz via llvm-commits]

jlpetz wrote:

> Please reply to this message to confirm that you have read these policies, especially the LLVM AI Tool Use Policy, and that any AI tool usage has been noted in the PR description.

I confirm I have read all three policies. This patch was developed with AI assistance (Claude Opus 5.5), noted in the PR description; I've reviewed and tested the change.



https://github.com/llvm/llvm-project/pull/228875