[llvm-branch-commits] [llvm] AMDGPU: Replace unused permlane inputs with poison instead of undef (PR #131288)

[Jay Foad via llvm-branch-commits]

jayfoad wrote:

Same kind of objection as #131287: as a general strategy, "replace unused inputs with poison" seems incompatible with "propagate poison from arguments to result". @nunoplopes any thoughts on this?

https://github.com/llvm/llvm-project/pull/131288