6 instructions

store_src_rg                   xy = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
splat_4_constants              color = 0
splat_4_constants              color = 0x3F800000 (1.0)
label                          label 0
copy_4_slots_unmasked          $0..3 = color
load_src                       src.rgba = $0..3