[Bug fortran/49648] ICE(segfault) with MATMUL and function-result actual argument

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49648

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

           What    |Removed                     |Added
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                 CC|                            |janus at gcc dot gnu.org

--- Comment #6 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-07-06 06:43:37 UTC ---
I tried something fancier by setting the proc_pointer/pointer attribute of
sym->attr based on sym->result->attr, but that fails for proc_ptr_result_3.f90
(cf. failing patch below). -- In that case, "get_sub()" is a function, which
returns a subroutine procedure pointer, i.e. "sym->result" is a subroutine
while "sym" itself is a function.

One solution would be, to save only the result attribute - in particular the
attr.subroutine/attr.function - and construct a new result symbol, re-using as
much as possible from "sym" itself. One just needs to make sure that one does
not double free components.

Alternatively, one should somehow make sure that also expressions below
sym->result - in particular: sym->result->as->{lbound,ubound} - get fixed via a
call to resolve_ref.