[llvm-branch-commits] [llvm] AMDGPU: Replace unused update.dpp inputs with poison instead of undef (PR #131287)

[Jay Foad via llvm-branch-commits]

jayfoad wrote:

I have a conceptual objection: I don't think we can do both of these things:

1. Replace unused inputs of all intrinsics with poison
2. Propagate poison from any argument, for all intrinsics

So how should we handle this in general? Is it better to replace unused inputs with "freeze poison"?

https://github.com/llvm/llvm-project/pull/131287