bgfx/3rdparty/glsl-optimizer/tests/fragment/swizzle-writemask-out.txt

void main ()
{
  vec4 c_1;
  c_1.x = dot (gl_FragCoord.xyz, vec3(1.0, 2.0, 3.0));
  c_1.yzw = vec3(4.0, 5.0, 6.0);
  gl_FragColor = c_1;
}