    1. store_src_rg                   coords = src.rg
    2. init_lane_masks                CondMask = LoopMask = RetMask = true
    3. copy_constant                  $0 = unknownInput
    4. swizzle_4                      $0..3 = ($0..3).xxxx
    5. copy_4_slots_unmasked          h4 = $0..3
    6. copy_constant                  $0 = unknownInput
    7. copy_slot_unmasked             $1 = $0
    8. zero_slot_unmasked             $2 = 0
    9. copy_constant                  $3 = 0x3F800000 (1.0)
   10. copy_4_slots_unmasked          h4 = $0..3
   11. zero_slot_unmasked             $0 = 0
   12. copy_constant                  $1 = unknownInput
   13. copy_constant                  $2 = 0x3F800000 (1.0)
   14. zero_slot_unmasked             $3 = 0
   15. copy_4_slots_unmasked          h4 = $0..3
   16. zero_slot_unmasked             $0 = 0
   17. copy_constant                  $1 = unknownInput
   18. zero_slot_unmasked             $2 = 0
   19. copy_constant                  $3 = unknownInput
   20. copy_4_slots_unmasked          h4 = $0..3
   21. load_src                       src.rgba = $0..3