https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114232
--- Comment #14 from rguenther at suse dot de <rguenther at suse dot de> --- On Tue, 5 Mar 2024, jakub at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114232 > > Jakub Jelinek <jakub at gcc dot gnu.org> changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > CC| |jakub at gcc dot gnu.org > > --- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> --- > Still, it would be nice to understand what changed > optimize_function_for_size_p > (cfun) > after IPA. Is something adjusting node->count or node->frequency? > Otherwise it should just depend on the optimize_size flag which should not > change... Maybe we share the TREE optimization node (it gets re-materialized during LTO streaming) between hot and cold functions and the "first" one getting in set_cfun will overwrite TREE_OPTIMIZATION_OPTABS in init_tree_optimization_optabs (though it seems to overwrite things). In any case I think the tree node sharing only looks at options, not at function frequency so having TREE_OPTIMIZATION_OPTABS part of the optimization node looks a bit fragile in the light of sharing.
