In https://embarkstudios.github.io/rust-gpu/api/spirv_std/arch/fn.control_barrier.html , there's no explanation of the MEMORY template parameter, or even what values are valid in it. (Turns out it is a scope, just like the EXECUTION parameter).

I guess what would be most immediately helpful is basically just examples matching the common ones like HLSL's GroupMemoryBarrierWithGroupSync.