[clang] Hlsl or intrinsic (PR #128979)

[Damyan Pepper via cfe-commits]

https://github.com/damyanp commented:

Please be sure to tag the issue that this is addressing in the PR description (something like "Closes #xxxx".)  Or at least make sure that it is linked in the "Development" section.

(Oops, I had two tabs open and confused github and myself)

https://github.com/llvm/llvm-project/pull/128979