re PR fortran/47023 (C_Sizeof: Rejects valid code)

2011-10-18  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/47023
	* decl.c (verify_c_interop_param): Renamed to
	'gfc_verify_c_interop_param'. Add error message for polymorphic
	arguments.
	(verify_c_interop): Renamed to 'gfc_verify_c_interop'. Reject
	polymorphic variables.
	(verify_bind_c_sym): Renamed 'verify_c_interop'.
	* gfortran.h (verify_c_interop,verify_c_interop_param): Renamed.
	* check.c (gfc_check_sizeof): Ditto.
	* resolve.c (gfc_iso_c_func_interface,resolve_fl_procedure): Ditto.
	* symbol.c (verify_bind_c_derived_type): Ditto.


2011-10-18  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/47023
	* gfortran.dg/iso_c_binding_class.f03: New.

From-SVN: r180130

gcc/fortran/ChangeLog

+2011-10-18  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/47023
+	* decl.c (verify_c_interop_param): Renamed to
+	'gfc_verify_c_interop_param'. Add error message for polymorphic
+	arguments.
+	(verify_c_interop): Renamed to 'gfc_verify_c_interop'. Reject
+	polymorphic variables.
+	(verify_bind_c_sym): Renamed 'verify_c_interop'.
+	* gfortran.h (verify_c_interop,verify_c_interop_param): Renamed.
+	* check.c (gfc_check_sizeof): Ditto.
+	* resolve.c (gfc_iso_c_func_interface,resolve_fl_procedure): Ditto.
+	* symbol.c (verify_bind_c_derived_type): Ditto.
+
 2011-10-15  Tom Tromey  <tromey@redhat.com>
 	    Dodji Seketeli  <dodji@redhat.com>
 

gcc/fortran/check.c

@@ -3455,7 +3455,7 @@ gfc_check_sizeof (gfc_expr *arg ATTRIBUTE_UNUSED)
 gfc_try
 gfc_check_c_sizeof (gfc_expr *arg)
 {
-  if (verify_c_interop (&arg->ts) != SUCCESS)
+  if (gfc_verify_c_interop (&arg->ts) != SUCCESS)
     {
       gfc_error ("'%s' argument of '%s' intrinsic at %L must be an "
 		 "interoperable data entity",

gcc/fortran/decl.c

@@ -961,7 +961,7 @@ get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
    across platforms.  */
 
 gfc_try
-verify_c_interop_param (gfc_symbol *sym)
+gfc_verify_c_interop_param (gfc_symbol *sym)
 {
   int is_c_interop = 0;
   gfc_try retval = SUCCESS;
@@ -1000,20 +1000,24 @@ verify_c_interop_param (gfc_symbol *sym)
     {
       if (sym->ns->proc_name->attr.is_bind_c == 1)
 	{
-	  is_c_interop =
-	    (verify_c_interop (&(sym->ts))
-	     == SUCCESS ? 1 : 0);
+	  is_c_interop = (gfc_verify_c_interop (&(sym->ts)) == SUCCESS ? 1 : 0);
 
 	  if (is_c_interop != 1)
 	    {
 	      /* Make personalized messages to give better feedback.  */
 	      if (sym->ts.type == BT_DERIVED)
-		gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
-			   "procedure '%s' but is not C interoperable "
+		gfc_error ("Variable '%s' at %L is a dummy argument to the "
+			   "BIND(C) procedure '%s' but is not C interoperable "
 			   "because derived type '%s' is not C interoperable",
 			   sym->name, &(sym->declared_at),
 			   sym->ns->proc_name->name, 
 			   sym->ts.u.derived->name);
+	      else if (sym->ts.type == BT_CLASS)
+		gfc_error ("Variable '%s' at %L is a dummy argument to the "
+			   "BIND(C) procedure '%s' but is not C interoperable "
+			   "because it is polymorphic",
+			   sym->name, &(sym->declared_at),
+			   sym->ns->proc_name->name);
 	      else
 		gfc_warning ("Variable '%s' at %L is a parameter to the "
 			     "BIND(C) procedure '%s' but may not be C "
@@ -3711,11 +3715,13 @@ set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
 /* Verify that the given gfc_typespec is for a C interoperable type.  */
 
 gfc_try
-verify_c_interop (gfc_typespec *ts)
+gfc_verify_c_interop (gfc_typespec *ts)
 {
   if (ts->type == BT_DERIVED && ts->u.derived != NULL)
     return (ts->u.derived->ts.is_c_interop || ts->u.derived->attr.is_bind_c)
 	   ? SUCCESS : FAILURE;
+  else if (ts->type == BT_CLASS)
+    return FAILURE;
   else if (ts->is_c_interop != 1)
     return FAILURE;
   
@@ -3788,7 +3794,7 @@ verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
      the given ts (current_ts), so look in both.  */
   if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) 
     {
-      if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
+      if (gfc_verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
 	{
 	  /* See if we're dealing with a sym in a common block or not.	*/
 	  if (is_in_common == 1)

gcc/fortran/gfortran.h

@@ -2581,8 +2581,8 @@ gfc_symtree* gfc_find_symtree_in_proc (const char *, gfc_namespace *);
 int gfc_find_symbol (const char *, gfc_namespace *, int, gfc_symbol **);
 int gfc_find_sym_tree (const char *, gfc_namespace *, int, gfc_symtree **);
 int gfc_get_symbol (const char *, gfc_namespace *, gfc_symbol **);
-gfc_try verify_c_interop (gfc_typespec *);
-gfc_try verify_c_interop_param (gfc_symbol *);
+gfc_try gfc_verify_c_interop (gfc_typespec *);
+gfc_try gfc_verify_c_interop_param (gfc_symbol *);
 gfc_try verify_bind_c_sym (gfc_symbol *, gfc_typespec *, int, gfc_common_head *);
 gfc_try verify_bind_c_derived_type (gfc_symbol *);
 gfc_try verify_com_block_vars_c_interop (gfc_common_head *);

gcc/fortran/resolve.c

@@ -2809,7 +2809,7 @@ gfc_iso_c_func_interface (gfc_symbol *sym, gfc_actual_arglist *args,
 			 &(args->expr->where));
 			 
           /* See if we have interoperable type and type param.  */
-          if (verify_c_interop (arg_ts) == SUCCESS
+          if (gfc_verify_c_interop (arg_ts) == SUCCESS
               || gfc_check_any_c_kind (arg_ts) == SUCCESS)
             {
               if (args_sym->attr.target == 1)
@@ -10544,7 +10544,7 @@ resolve_fl_procedure (gfc_symbol *sym, int mp_flag)
         {
           /* Skip implicitly typed dummy args here.  */
 	  if (curr_arg->sym->attr.implicit_type == 0)
-	    if (verify_c_interop_param (curr_arg->sym) == FAILURE)
+	    if (gfc_verify_c_interop_param (curr_arg->sym) == FAILURE)
 	      /* If something is found to fail, record the fact so we
 		 can mark the symbol for the procedure as not being
 		 BIND(C) to try and prevent multiple errors being

gcc/fortran/symbol.c

@@ -3635,7 +3635,7 @@ verify_bind_c_derived_type (gfc_symbol *derived_sym)
       else
 	{
 	  /* Grab the typespec for the given component and test the kind.  */ 
-	  is_c_interop = verify_c_interop (&(curr_comp->ts));
+	  is_c_interop = gfc_verify_c_interop (&(curr_comp->ts));
 	  
 	  if (is_c_interop != SUCCESS)
 	    {

gcc/testsuite/ChangeLog

+2011-10-18  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/47023
+	* gfortran.dg/iso_c_binding_class.f03: New.
+
 2011-10-18  Ira Rosen  <ira.rosen@linaro.org>
 
 	* testsuite/lib/target-supports.exp

gcc/testsuite/gfortran.dg/iso_c_binding_class.f03

+! { dg-do compile }
+!
+! PR 47023: C_Sizeof: Rejects valid code
+!
+! Contributed by Tobias Burnus <burnus@gcc.gnu.org>
+
+  use iso_c_binding
+  type t
+    integer(c_int) :: i
+  end type t
+contains
+  subroutine test(a) bind(c)  ! { dg-error "is not C interoperable" }
+    class(t) :: a
+  end subroutine
+end