SKIP: FAILED fn isNormal_863dcd() { var res : vec4 = isNormal(vec4()); } [[stage(vertex)]] fn vertex_main() { isNormal_863dcd(); } [[stage(fragment)]] fn fragment_main() { isNormal_863dcd(); } [[stage(compute)]] fn compute_main() { isNormal_863dcd(); } Failed to generate: error: is_normal not supported in HLSL backend yet