[clang] [llvm] [AMDGPU][GFX12] Add new v_permlane16 variants (PR #75475)

[Mariusz Sikora via cfe-commits]

mariusz-sikora-at-amd wrote:

> LGTM
> 
> You could also update existing permlane tests with run lines for gfx12:
> 
>     * test/CodeGen/AMDGPU/llvm.amdgcn.permlane.ll
> 
>     * test/CodeGen/AMDGPU/vcmpx-permlane-hazard.mir
> 
> 
> This can also be a separate patch.

New patch: https://github.com/llvm/llvm-project/pull/75572

https://github.com/llvm/llvm-project/pull/75475