Firefox nightly shader compilation issue

[meepen]

Issue Template

Description

On Firefox Nightly 136.0a1 (2025-01-15) (64-bit), using GPU acceleration while using Relic Optimizer causes a shader compilation issue

Steps to Reproduce

1. Use Firefox Nightly
2. Go to https://fribbels.github.io/hsr-optimizer#main
3. Select GPU Acceleration (stable)

Expected Behavior

No shader compilation issues

Actual Behavior

A shader compilation issue occurs,

Shader validation error: Function [42] 'calculateAshblazingSet' is invalid
     ┌─ :1784:1
     │  
1784 │ ╭ fn calculateAshblazingSet(
1785 │ │   p_x: ptr<function, ComputedStats>,
1786 │ │   p_state: ptr<function, ConditionalState>,
1787 │ │   hitMulti: f32,
     · │
1795 │ │ 
1796 │ │   return 0;
     │ │          ^ naga::Expression [23]
     │ ╰───────────^ naga::Function [42]
     │  
     = The `return` value Some([23]) does not match the function return value

Screenshots

Additional Information

I am aware Firefox Nightly is not a stable environment, and as such could cause issues that don't matter. I apologize if this is the case, but it was the only way to enable GPU acceleration via Firefox.

[fribbels]

Yeah this is unfortunately a known issue: https://github.com/fribbels/hsr-optimizer/blob/main/docs/guides/en/troubleshooting.md#error-gpu-acceleration-is-not-supported and we're awaiting a fix on Firefox's side. Their shader compilation method doesn't match the webgpu spec and hopefully will be updated soon.