https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114099
--- Comment #8 from Tamar Christina <tnfchris at gcc dot gnu.org> --- Created attachment 57537 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57537&action=edit uses.patch new code seems sensitive to visitation order as get_virtual_phi returns NULL for blocks which don't define or use a virtual PHI. testing patch.