re PR fortran/20847 (common block object may not have save attribute)

2005-10-12  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/20847
	PR fortran/20856
	* symbol.c (check_conflict): Prevent common variables and
	function results from having the SAVE attribute,as required
	by the standard.

2005-10-12  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/20847
	gfortran.dg/save_common.f90: New test.

	PR fortran/20856
	gfortran.dg/save_result.f90: New test.

From-SVN: r105325

gcc/fortran/ChangeLog

 2005-10-12  Paul Thomas  <pault@gcc.gnu.org>
 
+	PR fortran/20847
+	PR fortran/20856
+	* symbol.c (check_conflict): Prevent common variables and
+	function results from having the SAVE attribute,as required
+	by the standard.
+
+2005-10-12  Paul Thomas  <pault@gcc.gnu.org>
+
 	PR fortran/24207
 	* resolve.c (resolve_symbol): Exclude use and host associated
 	symbols from the test for private objects in a public namelist.

gcc/fortran/symbol.c

@@ -322,6 +322,9 @@ check_conflict (symbol_attribute * attr, const char * name, locus * where)
   conf (in_common, dummy);
   conf (in_common, allocatable);
   conf (in_common, result);
+  conf (in_common, save);
+  conf (result, save);
+
   conf (dummy, result);
 
   conf (in_equivalence, use_assoc);

gcc/testsuite/ChangeLog

+2005-10-12  Paul Thomas  <pault@gcc.gnu.org>
+
+	PR fortran/20847
+	gfortran.dg/save_common.f90: New test.
+
+	PR fortran/20856
+	gfortran.dg/save_result.f90: New test.
+
 2005-10-12  Nathan Sidwell  <nathan@codesourcery.com>
 
 	PR c++/21592

gcc/testsuite/gfortran.dg/save_common.f90

+! { dg-do compile }
+! PR20847 - A common variable may not have the SAVE attribute.
+! Contributed by Joost VandeVondele <jv244@cam.ac.uk>
+INTEGER, SAVE :: X
+COMMON /COM/ X ! { dg-error "conflicts with SAVE attribute" }
+END
\ No newline at end of file

gcc/testsuite/gfortran.dg/save_result.f90

+! { dg-do compile }
+! PR20856 - A function result may not have SAVE attribute.
+! Contributed by Joost VandeVondele <jv244@cam.ac.uk>
+FUNCTION X() RESULT(Y)
+REAL, SAVE :: Y ! { dg-error "RESULT attribute conflicts with SAVE" }
+y = 1
+END FUNCTION X
+END
\ No newline at end of file