On 27 February 2015 at 21:49, Jan Hubicka <hubi...@ucw.cz> wrote: >> >> ../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
For the record, I have noticed similar errors on ARM and AArch64 targets, when building glibc. Christophe.
