fs_reg result = prepare_alu_destination_and_sources(bld, instr, op, need_dest);
switch (instr->op) {
case nir_op_mov:
case nir_op_vec2:
case nir_op_vec3:
fs_reg result = prepare_alu_destination_and_sources(bld, instr, op, need_dest);
switch (instr->op) {
case nir_op_mov:
case nir_op_vec2:
case nir_op_vec3: