[llvm] [AMDGPU] SelectionDAG support for vector type set 0 to multiple sgpr64 (PR #128017)

[Janek van Oirschot via llvm-commits]

JanekvO wrote:

> You also have a number of regressions in the VALU cases. Should do something about those (which may mean not doing this for VALU values). 

Looking into it
> Also should consider v_mov_b64 on gfx940

Was going to be a follow up patch to fold the sgpr64 set 0 cases into vgpr64 in SIFoldOperand (perhaps should be peephole opt?)



https://github.com/llvm/llvm-project/pull/128017