42 instructions

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_constant                  check = 0
copy_slot_unmasked             $0 = check
copy_uniform                   $12 = colorGreen(1)
cmpeq_imm_float                $12 = equal($12, 0x3F800000 (1.0))
branch_if_no_active_lanes_eq   branch +3 (label 0 at #10) if no lanes of $12 == 0xFFFFFFFF
copy_constant                  $1 = 0
jump                           jump +3 (label 1 at #12)
label                          label 0
copy_constant                  $1 = 0x00000001 (1.401298e-45)
label                          label 0x00000001
add_int                        $0 += $1
copy_slot_unmasked             check = $0
copy_uniform                   $1 = colorGreen(0)
cmpeq_imm_float                $1 = equal($1, 0x3F800000 (1.0))
bitwise_and_imm_int            $1 &= 0x00000001
add_int                        $0 += $1
copy_slot_unmasked             check = $0
copy_4_uniforms                $12..15 = colorGreen
swizzle_2                      $12..13 = ($12..13).yx
copy_2_uniforms                $14..15 = colorRed(0..1)
cmpeq_2_floats                 $12..13 = equal($12..13, $14..15)
bitwise_and_int                $12 &= $13
branch_if_no_active_lanes_eq   branch +3 (label 2 at #28) if no lanes of $12 == 0xFFFFFFFF
copy_constant                  $1 = 0
jump                           jump +3 (label 3 at #30)
label                          label 0x00000002
copy_constant                  $1 = 0x00000001 (1.401298e-45)
label                          label 0x00000003
add_int                        $0 += $1
copy_slot_unmasked             check = $0
copy_4_uniforms                $1..4 = colorGreen
swizzle_2                      $1..2 = ($1..2).yx
copy_2_uniforms                $3..4 = colorRed(0..1)
cmpne_2_floats                 $1..2 = notEqual($1..2, $3..4)
bitwise_or_int                 $1 |= $2
bitwise_and_imm_int            $1 &= 0x00000001
add_int                        $0 += $1
copy_slot_unmasked             check = $0
cmpeq_imm_int                  $0 = equal($0, 0)
swizzle_4                      $0..3 = ($0..3).xxxx
copy_4_uniforms                $4..7 = colorRed
copy_4_uniforms                $8..11 = colorGreen
mix_4_ints                     $0..3 = mix($4..7, $8..11, $0..3)
load_src                       src.rgba = $0..3