[llvm-branch-commits] [llvm] [AMDGPU] New llvm.amdgcn.wave.id intrinsic (#79325) (PR #79689)

[Jay Foad via llvm-branch-commits]

jayfoad wrote:

@tstellar does this backport PR look OK? I created it with `gh pr create -f -B release/18.x` and I wasn't sure if I had to edit anything, apart from adding the release milestone.

https://github.com/llvm/llvm-project/pull/79689