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From: "Joost.VandeVondele at pci dot uzh.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/48412] New: [4.7 Regression] CP2K miscompiled due to some Fortran frontend pass
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48412

           Summary: [4.7 Regression] CP2K miscompiled due to some Fortran
                    frontend pass
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: Joost.VandeVondele@pci.uzh.ch


after the latest fix, CP2K now compiles at -O1, but is miscompiled. Manually
disabling the frontend passes like: 

gfc_run_passes (gfc_namespace *ns)
{
  if (0 && optimize)
    {

fixes the issue (and also running at -O0). The compiler was working fine before
the function optimization patch that went in a couple of days ago, so I suspect
that's the cause.

I have no other testcase than compiling CP2K and running an input like
cp2k/tests/QS/H2O.inp.