I really like the minimal approach you've taken here - it's refreshing to see this built completely from the ground up and it's clearly readable and for me, very educational.

But help me understand something. BarraCuda does its own codegen and therefore has to implement its own optimisation layer? It's increbibly impressive to get "working" binaries, but will it ever become a "viable" alternative to nvidia's CUDA if it has to re-invent decades of optimisation techniques? Is there a performance comparison between the binaries produced by this compiler and the nvidia one? Is this something you working on as an interesting technical project to learn from and prove that this "can be done"? Or are you trying to create something that can make CUDA a realistic option on AMD GPUs?