[require]
GLSL >= 1.10

[vertex shader]
void main()
{
	gl_Position = gl_Vertex;
}

[fragment shader]
uniform vec4 color;
void main()
{
	gl_FragColor = vec4(0.0);

	vec4 vec = color.xzyw + color.w;
	/* Test for a bug in the Mesa IR optimizer where MOV source
	 * register channels were considered based on a destination
	 * channel count basis rather than the positions of the
	 * channels in the writemask.
	 */
	gl_FragColor.y = vec.z;
}

[test]
uniform vec4 color 0.0 1.0 0.0 0.0
draw rect -1 -1 2 2
probe rgb 1 1 0.0 1.0 0.0