[llvm] [SPIRV] Emit LinkageType for function with hidden visibility (PR #164374)

[Juan Manuel Martinez Caamaño via llvm-commits]

jmmartinez wrote:

> This might not work well for HLSL as is. See https://github.com/llvm/wg-hlsl/blob/main/proposals/0026-symbol-visibility.md.

Thanks for the doc ! Yeah, this PR goes against this. I'll close this PR for the moment and come back later with more background. There is probably another way to get to the same place that I don't know about yet.

Thanks for the review !

https://github.com/llvm/llvm-project/pull/164374