[Bug fortran/49540] [4.6/4.7 Regression] Memory-hog with large DATA stmt

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49540

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |burnus at gcc dot gnu.org,
                   |                            |dfranke at gcc dot gnu.org,
                   |                            |jvdelisle at gcc dot
                   |                            |gnu.org

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-06-27 12:31:53 UTC ---
The patch in question (Rev. 159076, cf. link in comment 0) is:

2010-05-05  Daniel Franke  <franke.daniel@gmail.com>
    PR fortran/24978
    * gfortran.h: Removed repeat count from constructor, removed
    all usages.

That PR fixed an ICE on invalid code - and ensured gfortran diagnoses code
like:
  real :: e(3)
  data       e    / 3*1 /
  data       e(2) / 2 /
where "e"'s second element is multiple times initialized (which is not
diagnosed with -std=gnu, only with -std=f2008 - with gnu/legacy and with ifort,
the second initialization is plainly ignored).

Thus, in some way, the repeat count must come back. One possibility is to
handle the special case /<array_size>*<value>/, which is equivalent to a scalar
initialization. I think that should cover the most common case.