http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59948
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> --- The code in fold-const for nonzero check is really broken. I have somewerhe WIP symtab patch for doing this, but it is not completely trivial to hook it into fold-const when symtab is not built yet - just as in this case and in some cases for LTO you really want to know if symbol is defined...
