[Migrated] How to get spir-v with OpCapability Kernel?

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
25/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Stale
Tech stack
rust
Domain
compilers, computer-graphics

Research direction

The issue names a dummy Rust compute kernel, Vulkano, Intel Level Zero, and the required SPIR-V capabilities and memory model, but no repository file or test. Start by tracing how rust-gpu generates SPIR-V for compute shaders and compare that output with Level Zero's validation rules. Done means identifying a supported path to the required form or documenting the limitation clearly.

Written by the indexing model from the issue text.

Description

Issue automatically imported from old repo: https://github.com/EmbarkStudios/rust-gpu/issues/1094

Originally creatd by jczaja on 2023-09-22T07:57:23Z

Hi,

I have a dummy compute kernel:

#[spirv(compute(threads(768)))]
pub fn main_cs(
    #[spirv(global_invocation_id)] id: UVec3,
    #[spirv(storage_buffer, descriptor_set = 0, binding = 0)] prime_indices: &mut [u32],
) {
    let index = id.x as usize;
    prime_indices[index] = collatz(prime_indices[index]).1u32;
}

I can run it using Vulkano abd it works, but I wanted to run this spir-v kernel using Intel Level Zero and this did not work. Problem is that Intel Level zero is OpenCL like API and it require that SPIR-V is :

OpCapability Kernel
OpMemoryModel Physical64 OpenCL
..

while my dummy compute kernel as SPIR-V contains:

OpCapability Shader 
OpMemoryModel Logical Simple 
...

How can I compiler my rust compute shader so it is of SPIR-V form OpCapability Kernel ?

Dominant language
Rust
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