[Bug fortran/56342] MATMUL with PARAMETER: Simplification usually doesn't work

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56342

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Another example: http://gcc.gnu.org/ml/fortran/2013-07/msg00005.html - Here,
the SUM is not simplified.