http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55585
--- Comment #3 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> 2012-12-04 09:39:12 UTC --- (In reply to comment #2) > It's probably the very many calls. At -O2 VRP runs and eventually removes > most of them. Unfortunately, gfortran -c -ftime-report -O1 -fbounds-check -g -ftree-vrp slow.f90 is still equally slow.