tests/sksl/runtime/LargeProgram_ZeroIterFor.skrp

store_src_rg                   xy = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_constant                  i = 0
copy_slot_unmasked             $0 = i
cast_to_float_from_int         $0 = IntToFloat($0)
swizzle_4                      $0..3 = ($0..3).xxxx
load_src                       src.rgba = $0..3