[llvm] [Offload]: Skip copying of unused kernel-mapped data (PR #124723)

[Jan Patrick Lehr via llvm-commits]

jplehr wrote:

I have another question: The title says that it skips unused data copies, but a lot of the info output talks about redundant copies. Can you help me understand what's that distinction and how this patch determines if data is unused?

https://github.com/llvm/llvm-project/pull/124723