957009978e
For now always allocate space for the special built-in variables that need filling in for the vertex shader. Ideally we should get the compiler to analyze the shader and tell the driver if they are used so that we don't reserve and fill them needlessly. Signed-off-by: Karmjit Mahil <Karmjit.Mahil@imgtec.com> Reviewed-by: Frank Binns <frank.binns@imgtec.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21590>