https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79472
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Seems even unpatched switchconf isn't able to deal with virtual phis: void foo (int); void f1 (int v, int w) { int i; if (w) { foo (23); i = 129; } else switch (v) { case 170: i = 27; break; case 171: i = 8; break; case 172: i = 21; break; case 173: i = 18; break; case 174: i = 139; break; case 175: i = 14; break; case 176: i = -14; break; case 177: i = 12; break; default: i = 80; break; } lab: foo (i); } isn't converted either.