[llvm] [AMDGPU] Extend type support for update_dpp intrinsic (PR #114597)

[Jay Foad via llvm-commits]

jayfoad wrote:

> > Do we still need `V_MOV_B64_DPP_PSEUDO` after this?
> 
> Yes, we need a single MI to have something to be able to combine with other 64-bit VALU on targets supporting it. We could probably replace it with V_MOV_B64, but gfx90a has FeatureDPALU_DPP, but does not have V_MOV_B64.

Oh, I see. That's annoying. 64-bit DPP is only allowed on F64 operations, so there is nothing that we could easily use as a dummy V_MOV_B64-like instruction.

https://github.com/llvm/llvm-project/pull/114597