  We study what kind of topological crystalline insulator phase emerges from
nodal line semimetal phases in the face-centered cubic system which is not
indicated by topological indices when spin-orbit coupling (SOC) is introduced.
We construct an effective model which hosts two different nodal lines phases,
and calculated mirror Chern numbers in it by introducing SOC. As a result, we
find that the two nodal line phases with different nodal line configurations
are mapped to different topological crystalline insulator phases. This result
shows that turning off SOC and checking the nodal line configuration can
distinguish the two topological crystalline insulator phases, which have not
been distinguished by previous methods.
