[Bug fortran/40756] Cleanup TREE_BLOCK

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40756

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
   Last reconfirmed|                            |2013-06-20
         Depends on|                            |37132
         Resolution|FIXED                       |---
     Ever confirmed|0                           |1

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Let's reopen. I want to add a TREE_BLOCK for (module) global variables for
namelists, cf. PR37132. Those would be used by the BE/LTO.

Still, that's the opportunity to check whether we add TREE_BLOCK where it
doesn't make sense. Looking at the code, we seem might add pointless ones with
poplevel in f95-lang.c. Although, Diego stated: "They are also reachable
from EXPRs embedded in some types emitted by Fortran." - hence, there might be
additional places where they get added.