case nir_intrinsic_load_per_vertex_input:
case nir_intrinsic_load_per_vertex_output:
case nir_intrinsic_store_output:
return &instr->src[1];
case nir_intrinsic_load_per_vertex_input:
case nir_intrinsic_load_per_vertex_output:
case nir_intrinsic_store_output:
return &instr->src[1];