[Bug tree-optimization/21732] New: -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

["Ralf_Recker at gmx dot de" <gcc-bugzilla at gcc dot gnu dot org>]

When dumping the trees during compilation GCC-4.1-2005010[1,8] went into
an endless loop during the *.c.t22.copyprop or the *.c.t37.copyprop2 dump, thus
generating larger and larger files. After the file reaches 2GB in size gcc stops.

The same happens with gcc-4.1-20050515 in the steps *.c.t24.copyprop or
*.c.t38.copyprop2.

The dumper seems to follow and print a copy propagation chain like this in all
the cases: A->B->A->B->A->B->...

I've observed this behaviour with many source files.

-- 
           Summary: -ftree-dump-all-details hangs during *.c.t24.copyprop or
                    *.c.t38.copyprop2
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: Ralf_Recker at gmx dot de
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732