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          one = $0..3
    6. zero_4_slots_unmasked          zero = 0
    7. copy_4_constants               $0..3 = colorGreen
    8. copy_4_slots_unmasked          green = $0..3
    9. copy_4_slots_unmasked          $4..7 = one
   10. mul_4_floats                   $0..3 *= $4..7
   11. copy_4_slots_unmasked          $4..7 = zero
   12. add_4_floats                   $0..3 += $4..7
   13. copy_4_slots_unmasked          [main].result = $0..3
   14. load_src                       src.rgba = [main].result