test/tint/buffer/uniform/std140/array/mat4x3_f32/to_builtin.wgsl

@group(0) @binding(0) var<uniform> u : array<mat4x3<f32>, 4>;

@compute @workgroup_size(1)
fn f() {
    let t = transpose(u[2]);
    let l = length(u[0][1].zxy);
    let a = abs(u[0][1].zxy.x);
}