bitcast is not supported - https://www.w3.org/TR/WGSL/#bit-reinterp-builtin-functions Used by https://www.babylonjs.com/demos/webgpu/forestwebgpu Seems like this would map directly to Metal's "as_type" casting function (section 2.20, page 71 of the Metal language specification)
<rdar://problem/116936258>