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

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