[Bug fortran/34053] -frecursive: No need to use the stack for local variables of the main program

[burnus at gcc dot gnu dot org]

------- Comment #4 from burnus at gcc dot gnu dot org  2009-05-26 19:29 -------
s/main_program/is_main_program/

CLOSE as WONTFIX. As Andrew pointed out, there are a couple of issues using
static memory:

1. The middle end does not optimize static variables that well as it does not
know about non-recursive procedures

2. Marking loop variables etc. as static does not work well in the context of
OpenMP's private. This problem can be reduced by using a certain threshold (as
currently done for local variables), but it always exists

3. Given all the trouble, it is unlikely that a real-world program only has a
too large array in the main program (which can be cured by this patch); more
likely is that further large arrays exists in subroutines etc. For those this
patch won't help, but "ulimit -s unlimited" does.

4. This seems to be a relatively rarely reported problem; general stack limit
problems are more common, though.

-> CLOSE


-- 

burnus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34053