http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58270
--- Comment #18 from Krzysztof Strasburger <strasbur at chkw386 dot ch.pwr.wroc.pl> --- I have found that tree-fre, tree-pre and tree-dse have to be disabled in order to generate correctly working code at all optimization levels (both C and FORTRAN). I'm happy with this workaround, so thank you for all suggestions.
