    1. store_src_rg                   coords = src.rg
    2. init_lane_masks                CondMask = LoopMask = RetMask = true
    3. copy_constant                  $0 = 0x3F800000 (1.0)
    4. swizzle_4                      $0..3 = ($0..3).xxxx
    5. copy_4_slots_unmasked          x = $0..3
    6. store_loop_mask                $0 = LoopMask
    7. jump                           jump +14 (label 1 at #21)
    8. label                          label 0x00000002
    9. copy_slot_unmasked             $1 = x(0)
   10. copy_constant                  $2 = 0x3E800000 (0.25)
   11. sub_float                      $1 -= $2
   12. copy_slot_masked               x(0) = Mask($1)
   13. store_condition_mask           $1 = CondMask
   14. copy_slot_unmasked             $2 = x(0)
   15. zero_slot_unmasked             $3 = 0
   16. cmple_float                    $2 = lessThanEqual($2, $3)
   17. merge_condition_mask           CondMask = $1 & $2
   18. branch_if_all_lanes_active     branch_if_all_lanes_active +10 (label 0 at #28)
   19. mask_off_loop_mask             LoopMask &= ~(CondMask & LoopMask & RetMask)
   20. load_condition_mask            CondMask = $1
   21. label                          label 0x00000001
   22. copy_slot_unmasked             $1 = x(3)
   23. copy_constant                  $2 = 0x3F800000 (1.0)
   24. cmpeq_float                    $1 = equal($1, $2)
   25. merge_loop_mask                LoopMask &= $1
   26. stack_rewind
   27. branch_if_any_lanes_active     branch_if_any_lanes_active -19 (label 2 at #8)
   28. label                          label 0x00000000
   29. load_loop_mask                 LoopMask = $0
   30. store_loop_mask                $0 = LoopMask
   31. jump                           jump +19 (label 4 at #50)
   32. label                          label 0x00000005
   33. zero_slot_unmasked             $4 = 0
   34. copy_slot_unmasked             $1 = x(2)
   35. copy_constant                  $2 = 0x3E800000 (0.25)
   36. sub_float                      $1 -= $2
   37. copy_slot_masked               x(2) = Mask($1)
   38. store_condition_mask           $1 = CondMask
   39. copy_slot_unmasked             $2 = x(3)
   40. copy_constant                  $3 = 0x3F800000 (1.0)
   41. cmpeq_float                    $2 = equal($2, $3)
   42. merge_condition_mask           CondMask = $1 & $2
   43. copy_constant                  $5 = 0xFFFFFFFF
   44. copy_slot_masked               $4 = Mask($5)
   45. mask_off_loop_mask             LoopMask &= ~(CondMask & LoopMask & RetMask)
   46. load_condition_mask            CondMask = $1
   47. zero_slot_unmasked             $1 = 0
   48. copy_slot_masked               x(1) = Mask($1)
   49. reenable_loop_mask             LoopMask |= $4
   50. label                          label 0x00000004
   51. zero_slot_unmasked             $1 = 0
   52. copy_slot_unmasked             $2 = x(2)
   53. cmplt_float                    $1 = lessThan($1, $2)
   54. merge_loop_mask                LoopMask &= $1
   55. stack_rewind
   56. branch_if_any_lanes_active     branch_if_any_lanes_active -24 (label 5 at #32)
   57. label                          label 0x00000003
   58. load_loop_mask                 LoopMask = $0
   59. copy_4_slots_unmasked          $0..3 = x
   60. load_src                       src.rgba = $0..3