* cp-tree.h (remap_save_expr): Add walk_subtrees parameter.
	* optimize.c (copy_body_r): Pass it.
	* tree.c (remap_save_expr): Clear walk_subtrees for an
	already-handled SAVE_EXPR.
	(cp_unsave_r): Pass walk_subtrees to remap_save_expr.

From-SVN: r30926