8 gl_Position = gl_Vertex;
15 /* Test for a bug in the Mesa IR optimizer where source
16 * register values for arithmetic ops were considered based on
17 * a destination channel count basis rather than the positions
18 * of the channels in the writemask.
20 gl_FragColor.xzw = vec3(0.0);
21 gl_FragColor.y = color.w + color.y;
25 uniform vec4 color 0.0 1.0 0.0 0.0
27 probe rgb 1 1 0.0 1.0 0.0