[llvm-branch-commits] [llvm] [AMDGPU] Add synthetic apertures and use them for barriers (PR #209748)

[Pierre van Houtryve via llvm-branch-commits]

Pierre-vh wrote:

> The lld test seems to suggest we need bitcode auto upgrade

Indeed, I added it to #209746 along with unit tests

https://github.com/llvm/llvm-project/pull/209748