> > ../sysdeps/gnu/siglist.c:72:1: internal compiler error: in address_matters_p, > at symtab.c:1908 > versioned_symbol (libc, __new_sys_sigabbrev, sys_sigabbrev, GLIBC_2_3_3); > ^ > 0x66a080 symtab_node::address_matters_p() > /scratch/sellcey/repos/bootstrap/src/gcc/gcc/symtab.c:1908 > 0xe7cbe5 ipa_icf::sem_variable::merge(ipa_icf::sem_item*) > /scratch/sellcey/repos/bootstrap/src/gcc/gcc/ipa-icf.c:1443
Indeed, the ipa-icf should not try to analyze aliases - just prove ekvialence of definitions they are attached to. It already does that for functions (bit by accident; it gives up when there is no gimple body), but it does not do that for variables because it gets into ctor_for_folding. For that reason it sometimes decides to try to make two variable aliases alias of each other that is not a good idea, because of possible creation of loops. I am just discussing with Martin the fix. Honza
