[Bug fortran/45077] ICE with -fwhole-file in fold_convert_loc, at fold-const.c:2021

["burnus at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #5 from burnus at gcc dot gnu dot org  2010-07-29 17:00 -------
(In reply to comment #4)
> Fixed for the unmodified example in comment 1 - and also for PR 40011 comment
> 47.
> 
> However, the following remains to be done: It still fails if one moves "module
> iso_red" into a separate file (cf. PR 44945). The reason is that then "gsym"
> will come up as NULL and every
> module user uses a different decl.

The challenge to handle truly external procedures correctly is to use - if
possible - the correct interface. For EXTERNAL this is not quite possible - but
one should try to merge the different declarations while one parses the file,
e.g. when one encounters "EXTERNAL" one generates a GSYM - which later gets
updated with the interface (if present somewhere), by procedure usage ("call"),
or by the actual external procedure if it comes later in the file. At the same
time, a consistency check for type and arguments can be done.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45077