14 instructions

[immutable slots]
i0 = 0

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
store_loop_mask                $0 = LoopMask
jump                           jump +4 (label 1 at #8)
label                          label 0x00000002
branch_if_all_lanes_active     branch_if_all_lanes_active +8 (label 0 at #14)
mask_off_loop_mask             LoopMask &= ~(CondMask & LoopMask & RetMask)
label                          label 0x00000001
copy_constant                  $1 = 0
cmplt_imm_int                  $1 = lessThan($1, 0x00000004)
merge_loop_mask                LoopMask &= $1
stack_rewind
branch_if_any_lanes_active     branch_if_any_lanes_active -8 (label 2 at #5)
label                          label 0
load_loop_mask                 LoopMask = $0
copy_4_uniforms                $0..3 = colorGreen
load_src                       src.rgba = $0..3