@group(0) @binding(0) var<uniform> u : array<mat3x3<f32>, 4>;
@group(0) @binding(1) var<storage, read_write> s: f32;

fn a(a : array<mat3x3<f32>, 4>) -> f32 { return a[0][0].x; }
fn b(m : mat3x3<f32>) -> f32 { return m[0].x; }
fn c(v : vec3<f32>) -> f32 { return v.x; }
fn d(f : f32) -> f32 { return f; }

@compute @workgroup_size(1)
fn f() {
    s = a(u) +
        b(u[1]) +
        c(u[1][0].zxy) +
        d(u[1][0].zxy.x);
}