571     SV *sv2 = *PL_stack_sp--;  in Perl_rpp_popfree_2_NN()  local
572     assert(sv2);  in Perl_rpp_popfree_2_NN()
578     U32 rc2 = SvREFCNT(sv2);  in Perl_rpp_popfree_2_NN()
588         Perl_rpp_free_2_(aTHX_ sv1, sv2, rc1, rc2);  in Perl_rpp_popfree_2_NN()
591         SvREFCNT(sv2) = rc2 - 1;  in Perl_rpp_popfree_2_NN()
678 Perl_rpp_push_2(pTHX_ SV *sv1, SV *sv2)  in Perl_rpp_push_2()  argument
683     *++PL_stack_sp = sv2;  in Perl_rpp_push_2()
687     SvREFCNT_inc_simple_void_NN(sv2);  in Perl_rpp_push_2()
710 Perl_rpp_xpush_2(pTHX_ SV *sv1, SV *sv2)  in Perl_rpp_xpush_2()  argument
715     rpp_push_2(sv1, sv2);  in Perl_rpp_xpush_2()
873     SV *sv2 = *PL_stack_sp--;  in Perl_rpp_replace_2_1_COMMON()  local
874     assert(sv2);  in Perl_rpp_replace_2_1_COMMON()
881     U32 rc2 = SvREFCNT(sv2);  in Perl_rpp_replace_2_1_COMMON()
891         Perl_rpp_free_2_(aTHX_ sv1, sv2, rc1, rc2);  in Perl_rpp_replace_2_1_COMMON()
894         SvREFCNT(sv2) = rc2 - 1;  in Perl_rpp_replace_2_1_COMMON()