4 instructions

[immutable slots]
i0 = 0
i1 = 0x3F800000 (1.0)
i2 = 0
i3 = 0x3F800000 (1.0)

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_4_immutables_unmasked     $0..3 = i0..3 [0, 0x3F800000 (1.0), 0, 0x3F800000 (1.0)]
load_src                       src.rgba = $0..3