[Bug fortran/52022] [4.5/4.6/4.7 Regression] Wrong-code with procedures passed as actual argument

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52022

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |burnus at gcc dot gnu.org
   Target Milestone|---                         |4.5.4

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-01-27 
17:24:42 UTC ---
The issue is seemingly a side effect of supporting proc-pointer returning
functions (a GCC 4.5 features).

This does not interact well with passing nonprocedure-pointer functions, that
return allocatables, as can be seen from the following chunk in trans-expr.c's
gfc_conv_procedure_call:

                  if (fsym && e->expr_type != EXPR_NULL
                      && ((fsym->attr.pointer
                           && fsym->attr.flavor != FL_PROCEDURE)
                          || (fsym->attr.proc_pointer
                              && !(e->expr_type == EXPR_VARIABLE
                                   && e->symtree->n.sym->attr.dummy))
                          || (fsym->attr.proc_pointer
                              && e->expr_type == EXPR_VARIABLE
                              && gfc_is_proc_ptr_comp (e, NULL))
                          || fsym->attr.allocatable))

Untested patch: Do the same as we already do for pointers.

--- trans-expr.c        (revision 183625)
+++ trans-expr.c        (working copy)
@@ -3664,3 +3664,4 @@ gfc_conv_procedure_call (gfc_se * se, gf
                              && gfc_is_proc_ptr_comp (e, NULL))
-                         || fsym->attr.allocatable))
+                         || (fsym->attr.allocatable
+                             && fsym->attr.flavor != FL_PROCEDURE)))
                    {