9 instructions

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
splat_4_constants              rgb[0], rgb[1], rgb[2], a = 0
copy_constant                  rgb[0] = 0
copy_constant                  rgb[1] = 0x3F800000 (1.0)
copy_constant                  rgb[2] = 0
copy_constant                  a = 0x3F800000 (1.0)
copy_4_slots_unmasked          $0..3 = rgb[0], rgb[1], rgb[2], a
load_src                       src.rgba = $0..3