test/expressions/type_ctor/mat4x4/inferred/vectors/f32.wgsl

let m = mat4x4(vec4<f32>(0.0, 1.0, 2.0, 3.0),
               vec4<f32>(4.0, 5.0, 6.0, 7.0),
               vec4<f32>(8.0, 9.0, 10.0, 11.0),
               vec4<f32>(12.0, 13.0, 14.0, 15.0));