[llvm] [RFC] IR: Define noalias.addrspace metadata (PR #102461)

[Yaxun Liu via llvm-commits]

yxsamliu wrote:

Is the MD a promise to the backend that the attached memory operation is not in a specific address space?

Who will attach the MD to the IR? FE or some LLVM passes? FE may not be able to figure out the real address space of some memory operations.

https://github.com/llvm/llvm-project/pull/102461