* splay-tree.h (splay_tree_predecessor): Declare.

	* splay-tree.c (splay_tree_predecessor): New function.
	(splay_tree_successor): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@36304 138bc75d-0d04-0410-961f-82ee72b054a4