[clang] [llvm] Define pointer layout for AVR program address space (PR #134254)

[Ben Shi via llvm-commits]

benshi001 wrote:

> CC @benshi001
> 
> To be 100% honest I haven't tested this on AVR silicon yet. My motivation for the change is to allow for non-zero data address spaces in Rust which parses these LLVM data format specs, but would then use both 64-bit and 16-bit pointers for AVR. Apologies if this is bad practice!

Thanks! I will have a look later.

https://github.com/llvm/llvm-project/pull/134254