It's unlikely to diverge from the same general flavor as vulkan. The worst parts of the DXIL to SPIR-V conversion I remember from that chain of blog posts is re

It's unlikely to diverge from the same general flavor as vulkan. The worst parts of the DXIL to SPIR-V conversion I remember from that chain of blog posts is rebuilding structured control flow and how it interacts with atomics and wave convergence. That's a problem that goes away irrespective of any DX extensions to SPIR-V for supporting the binding model DX uses.