27 instructions

[immutable slots]
i0 = 0x3F000000 (0.5)
i1 = 0xBF5DB3D7 (-0.8660254)
i2 = 0x3F000000 (0.5)
i3 = 0
i4 = 0xBF5DB3D7 (-0.8660254)
i5 = 0x3F000000 (0.5)
i6 = 0
i7 = 0
i8 = 0xBF5DB3D7 (-0.8660254)

store_src_rg                   v0..1 = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_constant                  $0 = 0x6BF82779 (6e+26)
splat_3_constants              $1..3 = 0
copy_constant                  $4 = 0x40000000 (2.0)
splat_3_constants              $5..7 = 0
copy_constant                  $8 = 0x40000000 (2.0)
refract_4_floats               $0..3 = refract($0..3, $4..7, $8)
swizzle_4                      $0..3 = ($0..3).xxxx
copy_4_slots_unmasked          result = $0..3
copy_uniform                   $0 = a
splat_3_constants              $1..3 = 0
copy_uniform                   $4 = b
splat_3_constants              $5..7 = 0
copy_uniform                   $8 = c
refract_4_floats               $0..3 = refract($0..3, $4..7, $8)
copy_slot_unmasked             result(0) = $0
copy_4_uniforms                $0..3 = d
copy_4_uniforms                $4..7 = e
copy_uniform                   $8 = c
refract_4_floats               $0..3 = refract($0..3, $4..7, $8)
copy_4_slots_unmasked          result = $0..3
copy_2_immutables_unmasked     result(0..1) = i0..1 [0x3F000000 (0.5), 0xBF5DB3D7 (-0.8660254)]
copy_3_immutables_unmasked     result(0..2) = i2..4 [0x3F000000 (0.5), 0, 0xBF5DB3D7 (-0.8660254)]
copy_4_immutables_unmasked     result = i5..8 [0x3F000000 (0.5), 0, 0, 0xBF5DB3D7 (-0.8660254)]
copy_4_slots_unmasked          $0..3 = result
load_src                       src.rgba = $0..3