[Bug tree-optimization/46316] [4.6 regression] incorrect loop optimization

[ebotcazou at gcc dot gnu.org]

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. :-)