6 instructions

[immutable slots]
i0 = 0

store_src_rg                   xy = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_constant                  $0 = 0
cast_to_float_from_int         $0 = IntToFloat($0)
swizzle_4                      $0..3 = ($0..3).xxxx
load_src                       src.rgba = $0..3