re PR c++/42837 (FAIL: g++.dg/abi/packed1.C execution test)

	PR c++/42837
	* stor-layout.c (place_field): Don't warn about unnecessary DECL_PACKED
	if the type is packed.

From-SVN: r157013

gcc/ChangeLog

+2010-02-23  Jason Merrill  <jason@redhat.com>
+
+	PR c++/42837
+	* stor-layout.c (place_field): Don't warn about unnecessary
+	DECL_PACKED if the type is packed.
+
 2010-02-23  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/43139

gcc/stor-layout.c

@@ -1100,7 +1100,8 @@ place_field (record_layout_info rli, tree field)
 	      if (STRICT_ALIGNMENT)
 		warning (OPT_Wattributes, "packed attribute causes "
                          "inefficient alignment for %q+D", field);
-	      else
+	      /* Don't warn if DECL_PACKED was set by the type.  */
+	      else if (!TYPE_PACKED (rli->t))
 		warning (OPT_Wattributes, "packed attribute is "
 			 "unnecessary for %q+D", field);
 	    }