gimplify.c (gimplify_init_constructor): Do a block move for very small objects as well.

	* gimplify.c (gimplify_init_constructor): Do a block move for very
	small objects as well.

From-SVN: r187498

gcc/ChangeLog

+2012-05-15  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gimplify.c (gimplify_init_constructor): Do a block move for very
+	small objects as well.
+
 2012-05-15  Bernd Schmidt  <bernds@codesourcery.com>
 
 	* ira.c (find_moveable_pseudos): Skip registers whose

gcc/gimplify.c

@@ -4033,9 +4033,13 @@ gimplify_init_constructor (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
 	    else
 	      align = TYPE_ALIGN (type);
 
+	    /* Do a block move either if the size is so small as to make
+	       each individual move a sub-unit move on average, or if it
+	       is so large as to make individual moves inefficient.  */
 	    if (size > 0
 		&& num_nonzero_elements > 1
-		&& !can_move_by_pieces (size, align))
+		&& (size < num_nonzero_elements
+		    || !can_move_by_pieces (size, align)))
 	      {
 		if (notify_temp_creation)
 		  return GS_ERROR;