http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46316
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2010-11-06 10:05:21 UTC --- > It is very likely caused by revision 166280: > > http://gcc.gnu.org/ml/gcc-cvs/2010-11/msg00166.html Indeed, this apparently exposed a bug in the scalar evolution analysis invoked during the 2nd VRP pass. This stuff always causes me headaches. :-)