[Bug fortran/42945] New: Gcov -a fails on Fortan generated object file (infinite loop?)

[Bug fortran/42945] New: Gcov -a fails on Fortan generated object file (infinite loop?)

[graeme dot parkin at btinternet dot com]

On trying to do code coverage on set of Fortran files. After using gfortran-4
-fprofile-arcs -ftest-coverage, running test when you try to run gcov -a on one
of the Fortran files never ends (the rest are OK). The particular Fortran file
contains complex allocate commands. Can simplify and then it works.

The Fortran file is configure_arrays.f90 the modified one is
configure_arrays.modified.


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           Summary: Gcov -a fails on Fortan generated object file (infinite
                    loop?)
           Product: gcc
           Version: 4.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: graeme dot parkin at btinternet dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42945

[Bug fortran/42945] Gcov -a fails on Fortan generated object file (infinite loop?)

[graeme dot parkin at btinternet dot com]

------- Comment #1 from graeme dot parkin at btinternet dot com  2010-02-03 15:06 -------
Created an attachment (id=19796)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19796&action=view)
Contains all Fortran files which give this gcov -a error

Note can use compile.sh to run compilation etc. Expects lcov in place but can
remove and replace with gcov -a. Only run under cygwin 1.7.1.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42945

[Bug fortran/42945] Gcov -a fails on Fortan generated object file (infinite loop?)

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2010-02-03 15:41 -------
-a is very expensive and prone to run into some endless cfg reduction, try
to avoid it.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42945

[Bug fortran/42945] Gcov -a fails on Fortan generated object file (infinite loop?)

[graeme dot parkin at btinternet dot com]

------- Comment #3 from graeme dot parkin at btinternet dot com  2010-02-03 15:47 -------
(In reply to comment #2)
> -a is very expensive and prone to run into some endless cfg reduction, try
> to avoid it.
> 
I am actually using lcov (1.9) which uses it automatically (only by looking
into lcov discovered it used -a if available). I assume lcov uses it for some
analysis purpose. Not sure you can stop it and not sure what it does if I do.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42945