Should pointers be 64-bit?

With the current 32-bit pointer width, raw physical pointers are unconvenient at best and open up a bunch of pitfalls at worst.

Technically, pointers should be 64-bit, at least when any physical addressing model is enabled.
This is problematic because of the preferred integer width of 32-bit in shaders, while Rust assumes usize in most APIs.

Is there any way we could switch to a 64-bit target without compromising performance?
For example

• Add optimization passes to convert usize -> u32 for logical ops
• Add a custom SPIR-V type for usize that somehow gets inferred late
• Customize core to add u32 indexing

On the other hand, physical pointers in shaders are somewhat niche, especially with more progress towards better bindless extension.

Comienza revisando el PR #237 enlazado y el debate de la issue sobre punteros de 32 bits, direccionamiento físico, anchos de enteros de los shaders y las APIs usize de Rust. Determina si se puede admitir un destino de 64 bits sin comprometer el rendimiento de las operaciones lógicas, y documenta una dirección viable o las razones por las que no resulta práctico.