I have been using the last gfortran trunk snapshot (Nov 7, 2008), from
www.equation.com.

My matrix code is unable to converge using the -O3 flag.  Unfortunately I can't
send the code so this is likely not very useful except for me to say that the
code generated through using -O3 did not work while using -O2 did work.


-- 
           Summary: gfortran code generation error using -03 that is removed
                    when using -O2
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rich dot otero at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38060

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