[llvm] [DataLayout] Add byte specification (PR #106536)

[Nikita Popov via llvm-commits]

nikic wrote:

@bjope FWIW, my perspective here is kind of diametrically opposed: I am happy to accept non-8-bit-byte type support upstream, as long as it is actually a properly supported, *testable* configuration. But I would *not* accept patches to "make support easier" for a configuration that is not officially supported/tested.

(A corollary of this is that I am also only open to introducing this support in the middle-end, where we *can* cleanly test this using non-standard data layouts.)

https://github.com/llvm/llvm-project/pull/106536