[Bug fortran/66377] [F95] Wrong-code with equivalenced array in module

[sgk at troutmask dot apl.washington.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66377

--- Comment #9 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Wed, Jun 03, 2015 at 11:21:35AM -0700, Steve Kargl wrote:
> 
> > Does removing the code regress module size in the case
> > of modules with equiv used in modules used in modules etc?
> 
> I do not know.  I do not have a testcase handy unless there is
> one in gfortran.dg.  
> 

OK.  I tracked down Russel's patch and testcase.  After
applying his patch and then removing the code in question,
I get want we want.  Namely, the code in this PR
compiles correctly and duplicate equivalences in a
hierarchy of modules are removed.