test/tint/buffer/uniform/std140/unnested/mat3x4_f32/to_builtin.wgsl

@group(0) @binding(0) var<uniform> u : mat3x4<f32>;

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