Cleanup most switches
[cleanup] accept FIX_619_ADD_UNDEF_VAL_FOR_CONCEALMENT_MODE, FIX_622_SILENCE_USAN_WARNING, FIX_615_UBSAN_SPAR_TO_DIRAC
[cleanup] accept FIX_619_ADD_UNDEF_VAL_FOR_CONCEALMENT_MODE, FIX_622_SILENCE_USAN_WARNING, FIX_615_UBSAN_SPAR_TO_DIRAC