Starting nbench after compiling it with -ftree-loop-linear leads to an endless loop in the 'neural net' benchmark. This is reproducible with gcc-4.0.0 to gcc-4.0.2. I haven't looked at the preprocessed source for now, sorry.
-- Summary: [4.0] endless loop in nbench neural net with -ftree- loop-linear Product: gcc Version: 4.0.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: RonnyPeine at gmx dot de GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25449