    1. store_src_rg                   coords = src.rg
    2. init_lane_masks                CondMask = LoopMask = RetMask = true
    3. copy_constant                  $0 = unknownInput
    4. cast_to_int_from_float         $0 = FloatToInt($0)
    5. copy_slot_unmasked             i = $0
    6. swizzle_4                      $0..3 = ($0..3).xxxx
    7. copy_4_slots_unmasked          i4 = $0..3
    8. copy_slot_unmasked             $0 = i
    9. copy_slot_unmasked             $1 = $0
   10. zero_slot_unmasked             $2 = 0
   11. copy_constant                  $3 = 0x00000001 (1.401298e-45)
   12. copy_4_slots_unmasked          i4 = $0..3
   13. zero_slot_unmasked             $0 = 0
   14. copy_slot_unmasked             $1 = i
   15. copy_constant                  $2 = 0x00000001 (1.401298e-45)
   16. zero_slot_unmasked             $3 = 0
   17. copy_4_slots_unmasked          i4 = $0..3
   18. zero_slot_unmasked             $0 = 0
   19. copy_slot_unmasked             $1 = i
   20. zero_slot_unmasked             $2 = 0
   21. copy_slot_unmasked             $3 = i
   22. copy_4_slots_unmasked          i4 = $0..3
   23. cast_to_float_from_4_ints      $0..3 = IntToFloat($0..3)
   24. load_src                       src.rgba = $0..3