https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62051
--- Comment #13 from Jan Hubicka <hubicka at gcc dot gnu.org> --- Created attachment 37388 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37388&action=edit patch Hi, this patch adds the logic to gimple-fold.c which makes the offending dtor non-refeable. It is bit uglier than I hoped for. The reason is that the dtor itself is COMDAT so it seems perfectly OK to refer it since we can provide the body, but the body itself refers to vtable that is not output in the unit. The patch simply prohibits references to all COMDAT and EXTERN methods and vtables of types with visibility attributes which will prevent optimizing of many inlines i.e. in libstdc++. It still seem to me that the the testcase is sort of invalid because it provide inline body for the dtor. Can we think of better solution (perhaps validating comdats before using them and checking if symbols they refer to are referable)?
