[llvm] [AMDGPU][MC] Allow op_sel in v_alignbit_b32 etc in GFX9 and GFX10 (PR #142188)

[Stanislav Mekhanoshin via llvm-commits]

https://github.com/rampitec commented:

Hm... I see it is supported, but what does it do in a b32 instruction?

https://github.com/llvm/llvm-project/pull/142188