[libc] [llvm] [LLVM] Port 'llvm-gpu-loader' to use LLVMOffload (PR #162739)

[Jon Chesterfield via llvm-commits]

JonChesterfield wrote:

I'm surprised to see this. The point of the standalone loader was to not inflict the failure modes of openmp on libc. I'll ping Joseph offline for the context.

https://github.com/llvm/llvm-project/pull/162739