re PR fortran/84511 (Internal compiler error from directly printing return of C_LOC)

2018-02-23  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/84511
	* trans-io.c (transfer_expr): Deal with C_LOC in transfer statement.

From-SVN: r257943

gcc/fortran/ChangeLog

 2018-02-23  Steven G. Kargl  <kargl@gcc.gnu.org>
 
+	PR fortran/84511
+	* trans-io.c (transfer_expr): Deal with C_LOC in transfer statement.
+
+2018-02-23  Steven G. Kargl  <kargl@gcc.gnu.org>
+
 	PR fortran/84346
 	* interface.c (compare_actual_formal): Issue error if keyword is
 	used in a statement function.

gcc/fortran/trans-io.c

@@ -2289,6 +2289,16 @@ transfer_expr (gfc_se * se, gfc_typespec * ts, tree addr_expr,
       ts->kind = gfc_index_integer_kind;
     }
 
+  /* gfortran reaches here for "print *, c_loc(xxx)".  */
+  if (ts->type == BT_VOID
+      && code->expr1 && code->expr1->ts.type == BT_VOID
+      && code->expr1->symtree
+      && strcmp (code->expr1->symtree->name, "c_loc") == 0)
+    {
+      ts->type = BT_INTEGER;
+      ts->kind = gfc_index_integer_kind;
+    }
+
   kind = ts->kind;
   function = NULL;
   arg2 = NULL;