[Webkit-unassigned] [Bug 268425] New: [WGSL] override expressions as array lengths do not compile

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=268425

            Bug ID: 268425
           Summary: [WGSL] override expressions as array lengths do not
                    compile
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGPU
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mwyrzykowski at apple.com

Running the following CTS test:
  https://gpuweb.github.io/cts/standalone/?q=webgpu:api,validation,compute_pipeline:overrides,workgroup_size,limits,workgroup_storage_size:isAsync=true

We see the error:
  1 error generated while compiling the shader:
  5:45: array count must evaluate to a constant integer expression or override variable

--------------- Shader source ---------------

              override a: u32;
              override b: u32;

              var<workgroup> mat4_data: array<mat4x4<f32>, b>;
              @compute @workgroup_size(1) fn main() {

                _ = mat4_data[0];
              }
--------------- end shader source ---------------

We can use function constants inside the generated metal shading language array length declaration.

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