1. store_src_rg                   coords = src.rg
    2. init_lane_masks                CondMask = LoopMask = RetMask = true
    3. zero_slot_unmasked             ok = 0
    4. copy_constant                  $0 = 0xFFFFFFFF
    5. copy_slot_unmasked             ok = $0
    6. copy_4_constants               $0..3 = colorGreen
    7. copy_4_slots_unmasked          green = $0..3
    8. copy_4_constants               $0..3 = colorRed
    9. copy_4_slots_unmasked          red = $0..3
   10. zero_slot_unmasked             param = 0
   11. copy_constant                  $0 = 0xFFFFFFFF
   12. copy_slot_unmasked             x = $0
   13. zero_slot_unmasked             [do_side_effect].result = 0
   14. copy_slot_unmasked             $0 = x
   15. copy_slot_unmasked             param = $0
   16. copy_slot_unmasked             $0 = [do_side_effect].result
   17. label                          label 0x00000000
   18. copy_constant                  call = 0xFFFFFFFF
   19. copy_slot_unmasked             $0 = ok
   20. copy_slot_unmasked             $1 = param
   21. bitwise_and_int                $0 &= $1
   22. copy_slot_unmasked             $1 = call
   23. bitwise_and_int                $0 &= $1
   24. swizzle_4                      $0..3 = ($0..3).xxxx
   25. copy_4_slots_unmasked          $4..7 = red
   26. copy_4_slots_unmasked          $8..11 = green
   27. mix_4_ints                     $0..3 = mix($4..7, $8..11, $0..3)
   28. copy_4_slots_unmasked          [main].result = $0..3
   29. load_src                       src.rgba = [main].result